X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/ebb1b9f42b62218f29061826217bb0f71cd375a6..4ba76501152d51ccb5647018f3192c6096367d48:/bsd/vfs/vfs_subr.c?ds=sidebyside diff --git a/bsd/vfs/vfs_subr.c b/bsd/vfs/vfs_subr.c index 4280f3bfd..f8304f9ad 100644 --- a/bsd/vfs/vfs_subr.c +++ b/bsd/vfs/vfs_subr.c @@ -1,8 +1,8 @@ /* - * Copyright (c) 2000-2010 Apple Inc. All rights reserved. + * Copyright (c) 2000-2019 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ - * + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in @@ -11,10 +11,10 @@ * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. - * + * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. - * + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -22,7 +22,7 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * + * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ @@ -76,7 +76,6 @@ * External virtual filesystem routines */ - #include #include #include @@ -105,14 +104,18 @@ #include #include #include +#include #include +#include #include #include -#include - +#include #include +#include +#include +#include #include @@ -120,21 +123,26 @@ #include #include -#include /* kalloc()/kfree() */ -#include /* delay_for_interval() */ -#include /* OSAddAtomic() */ - +#include /* kalloc()/kfree() */ +#include /* delay_for_interval() */ +#include /* OSAddAtomic() */ +#if !CONFIG_EMBEDDED +#include +#endif #ifdef JOE_DEBUG #include #endif -#include /* vnode_pager_vrele() */ +#include /* vnode_pager_vrele() */ #if CONFIG_MACF #include #endif +#include +#include + extern lck_grp_t *vnode_lck_grp; extern lck_attr_t *vnode_lck_attr; @@ -149,7 +157,7 @@ enum vtype iftovt_tab[16] = { VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON, VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD, }; -int vttoif_tab[9] = { +int vttoif_tab[9] = { 0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, S_IFSOCK, S_IFIFO, S_IFMT, }; @@ -163,40 +171,46 @@ extern void memory_object_mark_unused( memory_object_control_t control, boolean_t rage); +extern void memory_object_mark_io_tracking( + memory_object_control_t control); /* XXX next protptype should be from */ extern int nfs_vinvalbuf(vnode_t, int, vfs_context_t, int); +extern int paniclog_append_noflush(const char *format, ...); + /* XXX next prototytype should be from libsa/stdlib.h> but conflicts libkern */ __private_extern__ void qsort( - void * array, - size_t nmembers, - size_t member_size, - int (*)(const void *, const void *)); + void * array, + size_t nmembers, + size_t member_size, + int (*)(const void *, const void *)); -extern kern_return_t adjust_vm_object_cache(vm_size_t oval, vm_size_t nval); __private_extern__ void vntblinit(void); -__private_extern__ kern_return_t reset_vmobjectcache(unsigned int val1, - unsigned int val2); -__private_extern__ int unlink1(vfs_context_t, struct nameidata *, int); +__private_extern__ int unlink1(vfs_context_t, vnode_t, user_addr_t, + enum uio_seg, int); extern int system_inshutdown; static void vnode_list_add(vnode_t); +static void vnode_async_list_add(vnode_t); static void vnode_list_remove(vnode_t); static void vnode_list_remove_locked(vnode_t); +static void vnode_abort_advlocks(vnode_t); static errno_t vnode_drain(vnode_t); static void vgone(vnode_t, int flags); static void vclean(vnode_t vp, int flag); static void vnode_reclaim_internal(vnode_t, int, int, int); -static void vnode_dropiocount (vnode_t); +static void vnode_dropiocount(vnode_t); static vnode_t checkalias(vnode_t vp, dev_t nvp_rdev); static int vnode_reload(vnode_t); static int vnode_isinuse_locked(vnode_t, int, int); +static int unmount_callback(mount_t, __unused void *); + static void insmntque(vnode_t vp, mount_t mp); static int mount_getvfscnt(void); static int mount_fillfsids(fsid_t *, int ); @@ -207,102 +221,118 @@ static int vnode_iterate_reloadq(mount_t); static void vnode_iterate_clear(mount_t); static mount_t vfs_getvfs_locked(fsid_t *); static int vn_create_reg(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, - struct vnode_attr *vap, uint32_t flags, int fmode, uint32_t *statusp, vfs_context_t ctx); + struct vnode_attr *vap, uint32_t flags, int fmode, uint32_t *statusp, vfs_context_t ctx); static int vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uint32_t *defaulted_fieldsp, vfs_context_t ctx); -errno_t rmdir_remove_orphaned_appleDouble(vnode_t, vfs_context_t, int *); +errno_t rmdir_remove_orphaned_appleDouble(vnode_t, vfs_context_t, int *); #ifdef JOE_DEBUG static void record_vp(vnode_t vp, int count); #endif +#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG) +extern int bootarg_no_vnode_jetsam; /* from bsd_init.c default value is 0 */ +#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */ + +extern int bootarg_no_vnode_drain; /* from bsd_init.c default value is 0 */ + +boolean_t root_is_CF_drive = FALSE; + #if CONFIG_TRIGGERS static int vnode_resolver_create(mount_t, vnode_t, struct vnode_trigger_param *, boolean_t external); static void vnode_resolver_detach(vnode_t); #endif -TAILQ_HEAD(freelst, vnode) vnode_free_list; /* vnode free list */ -TAILQ_HEAD(deadlst, vnode) vnode_dead_list; /* vnode dead list */ +TAILQ_HEAD(freelst, vnode) vnode_free_list; /* vnode free list */ +TAILQ_HEAD(deadlst, vnode) vnode_dead_list; /* vnode dead list */ +TAILQ_HEAD(async_work_lst, vnode) vnode_async_work_list; -TAILQ_HEAD(ragelst, vnode) vnode_rage_list; /* vnode rapid age list */ + +TAILQ_HEAD(ragelst, vnode) vnode_rage_list; /* vnode rapid age list */ struct timeval rage_tv; -int rage_limit = 0; -int ragevnodes = 0; +int rage_limit = 0; +int ragevnodes = 0; +static int vfs_unmountall_started = 0; + +#define RAGE_LIMIT_MIN 100 +#define RAGE_TIME_LIMIT 5 + +/* + * ROSV definitions + * NOTE: These are shadowed from PlatformSupport definitions, but XNU + * builds standalone. + */ +#define PLATFORM_DATA_VOLUME_MOUNT_POINT "/System/Volumes/Data" +#define PLATFORM_VM_VOLUME_MOUNT_POINT "/private/var/vm" -#define RAGE_LIMIT_MIN 100 -#define RAGE_TIME_LIMIT 5 -struct mntlist mountlist; /* mounted filesystem list */ +struct mntlist mountlist; /* mounted filesystem list */ static int nummounts = 0; +static int print_busy_vnodes = 0; /* print out busy vnodes */ + #if DIAGNOSTIC -#define VLISTCHECK(fun, vp, list) \ +#define VLISTCHECK(fun, vp, list) \ if ((vp)->v_freelist.tqe_prev == (struct vnode **)0xdeadb) \ - panic("%s: %s vnode not on %slist", (fun), (list), (list)); + panic("%s: %s vnode not on %slist", (fun), (list), (list)); #else #define VLISTCHECK(fun, vp, list) #endif /* DIAGNOSTIC */ -#define VLISTNONE(vp) \ - do { \ - (vp)->v_freelist.tqe_next = (struct vnode *)0; \ - (vp)->v_freelist.tqe_prev = (struct vnode **)0xdeadb; \ +#define VLISTNONE(vp) \ + do { \ + (vp)->v_freelist.tqe_next = (struct vnode *)0; \ + (vp)->v_freelist.tqe_prev = (struct vnode **)0xdeadb; \ } while(0) -#define VONLIST(vp) \ +#define VONLIST(vp) \ ((vp)->v_freelist.tqe_prev != (struct vnode **)0xdeadb) /* remove a vnode from free vnode list */ -#define VREMFREE(fun, vp) \ - do { \ - VLISTCHECK((fun), (vp), "free"); \ - TAILQ_REMOVE(&vnode_free_list, (vp), v_freelist); \ - VLISTNONE((vp)); \ - freevnodes--; \ +#define VREMFREE(fun, vp) \ + do { \ + VLISTCHECK((fun), (vp), "free"); \ + TAILQ_REMOVE(&vnode_free_list, (vp), v_freelist); \ + VLISTNONE((vp)); \ + freevnodes--; \ } while(0) - /* remove a vnode from dead vnode list */ -#define VREMDEAD(fun, vp) \ - do { \ - VLISTCHECK((fun), (vp), "dead"); \ - TAILQ_REMOVE(&vnode_dead_list, (vp), v_freelist); \ - VLISTNONE((vp)); \ - vp->v_listflag &= ~VLIST_DEAD; \ - deadvnodes--; \ +#define VREMDEAD(fun, vp) \ + do { \ + VLISTCHECK((fun), (vp), "dead"); \ + TAILQ_REMOVE(&vnode_dead_list, (vp), v_freelist); \ + VLISTNONE((vp)); \ + vp->v_listflag &= ~VLIST_DEAD; \ + deadvnodes--; \ } while(0) -/* remove a vnode from rage vnode list */ -#define VREMRAGE(fun, vp) \ - do { \ - if ( !(vp->v_listflag & VLIST_RAGE)) \ - panic("VREMRAGE: vp not on rage list"); \ - VLISTCHECK((fun), (vp), "rage"); \ - TAILQ_REMOVE(&vnode_rage_list, (vp), v_freelist); \ - VLISTNONE((vp)); \ - vp->v_listflag &= ~VLIST_RAGE; \ - ragevnodes--; \ +/* remove a vnode from async work vnode list */ +#define VREMASYNC_WORK(fun, vp) \ + do { \ + VLISTCHECK((fun), (vp), "async_work"); \ + TAILQ_REMOVE(&vnode_async_work_list, (vp), v_freelist); \ + VLISTNONE((vp)); \ + vp->v_listflag &= ~VLIST_ASYNC_WORK; \ + async_work_vnodes--; \ } while(0) -/* - * vnodetarget hasn't been used in a long time, but - * it was exported for some reason... I'm leaving in - * place for now... it should be deprecated out of the - * exports and removed eventually. - */ -u_int32_t vnodetarget; /* target for vnreclaim() */ -#define VNODE_FREE_TARGET 20 /* Default value for vnodetarget */ +/* remove a vnode from rage vnode list */ +#define VREMRAGE(fun, vp) \ + do { \ + if ( !(vp->v_listflag & VLIST_RAGE)) \ + panic("VREMRAGE: vp not on rage list"); \ + VLISTCHECK((fun), (vp), "rage"); \ + TAILQ_REMOVE(&vnode_rage_list, (vp), v_freelist); \ + VLISTNONE((vp)); \ + vp->v_listflag &= ~VLIST_RAGE; \ + ragevnodes--; \ + } while(0) -/* - * We need quite a few vnodes on the free list to sustain the - * rapid stat() the compilation process does, and still benefit from the name - * cache. Having too few vnodes on the free list causes serious disk - * thrashing as we cycle through them. - */ -#define VNODE_FREE_MIN CONFIG_VNODE_FREE_MIN /* freelist should have at least this many */ +static void async_work_continue(void); /* * Initialize the vnode management data structures. @@ -310,69 +340,51 @@ u_int32_t vnodetarget; /* target for vnreclaim() */ __private_extern__ void vntblinit(void) { + thread_t thread = THREAD_NULL; + TAILQ_INIT(&vnode_free_list); TAILQ_INIT(&vnode_rage_list); TAILQ_INIT(&vnode_dead_list); + TAILQ_INIT(&vnode_async_work_list); TAILQ_INIT(&mountlist); - if (!vnodetarget) - vnodetarget = VNODE_FREE_TARGET; - microuptime(&rage_tv); rage_limit = desiredvnodes / 100; - if (rage_limit < RAGE_LIMIT_MIN) - rage_limit = RAGE_LIMIT_MIN; - - /* - * Scale the vm_object_cache to accomodate the vnodes - * we want to cache - */ - (void) adjust_vm_object_cache(0, desiredvnodes - VNODE_FREE_MIN); -} - -/* Reset the VM Object Cache with the values passed in */ -__private_extern__ kern_return_t -reset_vmobjectcache(unsigned int val1, unsigned int val2) -{ - vm_size_t oval = val1 - VNODE_FREE_MIN; - vm_size_t nval; - - if (val1 == val2) { - return KERN_SUCCESS; + if (rage_limit < RAGE_LIMIT_MIN) { + rage_limit = RAGE_LIMIT_MIN; } - if(val2 < VNODE_FREE_MIN) - nval = 0; - else - nval = val2 - VNODE_FREE_MIN; - - return(adjust_vm_object_cache(oval, nval)); + /* + * create worker threads + */ + kernel_thread_start((thread_continue_t)async_work_continue, NULL, &thread); + thread_deallocate(thread); } - /* the timeout is in 10 msecs */ int -vnode_waitforwrites(vnode_t vp, int output_target, int slpflag, int slptimeout, const char *msg) { - int error = 0; +vnode_waitforwrites(vnode_t vp, int output_target, int slpflag, int slptimeout, const char *msg) +{ + int error = 0; struct timespec ts; KERNEL_DEBUG(0x3010280 | DBG_FUNC_START, (int)vp, output_target, vp->v_numoutput, 0, 0); if (vp->v_numoutput > output_target) { + slpflag |= PDROP; - slpflag |= PDROP; - - vnode_lock_spin(vp); + vnode_lock_spin(vp); while ((vp->v_numoutput > output_target) && error == 0) { - if (output_target) - vp->v_flag |= VTHROTTLED; - else - vp->v_flag |= VBWAIT; + if (output_target) { + vp->v_flag |= VTHROTTLED; + } else { + vp->v_flag |= VBWAIT; + } - ts.tv_sec = (slptimeout/100); - ts.tv_nsec = (slptimeout % 1000) * 10 * NSEC_PER_USEC * 1000 ; + ts.tv_sec = (slptimeout / 100); + ts.tv_nsec = (slptimeout % 1000) * 10 * NSEC_PER_USEC * 1000; error = msleep((caddr_t)&vp->v_numoutput, &vp->v_lock, (slpflag | (PRIBIO + 1)), msg, &ts); vnode_lock_spin(vp); @@ -386,9 +398,9 @@ vnode_waitforwrites(vnode_t vp, int output_target, int slpflag, int slptimeout, void -vnode_startwrite(vnode_t vp) { - - OSAddAtomic(1, &vp->v_numoutput); +vnode_startwrite(vnode_t vp) +{ + OSAddAtomic(1, &vp->v_numoutput); } @@ -398,12 +410,13 @@ vnode_writedone(vnode_t vp) if (vp) { int need_wakeup = 0; - OSAddAtomic(-1, &vp->v_numoutput); + OSAddAtomic(-1, &vp->v_numoutput); vnode_lock_spin(vp); - if (vp->v_numoutput < 0) + if (vp->v_numoutput < 0) { panic("vnode_writedone: numoutput < 0"); + } if ((vp->v_flag & VTHROTTLED)) { vp->v_flag &= ~VTHROTTLED; @@ -414,9 +427,10 @@ vnode_writedone(vnode_t vp) need_wakeup = 1; } vnode_unlock(vp); - - if (need_wakeup) + + if (need_wakeup) { wakeup((caddr_t)&vp->v_numoutput); + } } } @@ -425,27 +439,30 @@ vnode_writedone(vnode_t vp) int vnode_hasdirtyblks(vnode_t vp) { - struct cl_writebehind *wbp; + struct cl_writebehind *wbp; /* * Not taking the buf_mtxp as there is little * point doing it. Even if the lock is taken the - * state can change right after that. If their + * state can change right after that. If their * needs to be a synchronization, it must be driven * by the caller - */ - if (vp->v_dirtyblkhd.lh_first) - return (1); - - if (!UBCINFOEXISTS(vp)) - return (0); + */ + if (vp->v_dirtyblkhd.lh_first) { + return 1; + } + + if (!UBCINFOEXISTS(vp)) { + return 0; + } wbp = vp->v_ubcinfo->cl_wbehind; - if (wbp && (wbp->cl_number || wbp->cl_scmap)) - return (1); + if (wbp && (wbp->cl_number || wbp->cl_scmap)) { + return 1; + } - return (0); + return 0; } int @@ -454,58 +471,72 @@ vnode_hascleanblks(vnode_t vp) /* * Not taking the buf_mtxp as there is little * point doing it. Even if the lock is taken the - * state can change right after that. If their + * state can change right after that. If their * needs to be a synchronization, it must be driven * by the caller - */ - if (vp->v_cleanblkhd.lh_first) - return (1); - return (0); + */ + if (vp->v_cleanblkhd.lh_first) { + return 1; + } + return 0; } void vnode_iterate_setup(mount_t mp) { - while (mp->mnt_lflag & MNT_LITER) { - mp->mnt_lflag |= MNT_LITERWAIT; - msleep((caddr_t)mp, &mp->mnt_mlock, PVFS, "vnode_iterate_setup", NULL); - } - mp->mnt_lflag |= MNT_LITER; - } int vnode_umount_preflight(mount_t mp, vnode_t skipvp, int flags) { vnode_t vp; + int ret = 0; TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { - /* disable preflight only for udf, a hack to be removed after 4073176 is fixed */ - if (vp->v_tag == VT_UDF) - return 0; - if (vp->v_type == VDIR) + if (vp->v_type == VDIR) { continue; - if (vp == skipvp) + } + if (vp == skipvp) { continue; - if ((flags & SKIPSYSTEM) && ((vp->v_flag & VSYSTEM) || - (vp->v_flag & VNOFLUSH))) + } + if ((flags & SKIPSYSTEM) && ((vp->v_flag & VSYSTEM) || (vp->v_flag & VNOFLUSH))) { continue; - if ((flags & SKIPSWAP) && (vp->v_flag & VSWAP)) + } + if ((flags & SKIPSWAP) && (vp->v_flag & VSWAP)) { continue; - if ((flags & WRITECLOSE) && - (vp->v_writecount == 0 || vp->v_type != VREG)) + } + if ((flags & WRITECLOSE) && (vp->v_writecount == 0 || vp->v_type != VREG)) { continue; + } + /* Look for busy vnode */ - if (((vp->v_usecount != 0) && - ((vp->v_usecount - vp->v_kusecount) != 0))) - return(1); + if ((vp->v_usecount != 0) && ((vp->v_usecount - vp->v_kusecount) != 0)) { + ret = 1; + if (print_busy_vnodes && ((flags & FORCECLOSE) == 0)) { + vprint("vnode_umount_preflight - busy vnode", vp); + } else { + return ret; + } + } else if (vp->v_iocount > 0) { + /* Busy if iocount is > 0 for more than 3 seconds */ + tsleep(&vp->v_iocount, PVFS, "vnode_drain_network", 3 * hz); + if (vp->v_iocount > 0) { + ret = 1; + if (print_busy_vnodes && ((flags & FORCECLOSE) == 0)) { + vprint("vnode_umount_preflight - busy vnode", vp); + } else { + return ret; + } + } + continue; } - - return(0); + } + + return ret; } -/* +/* * This routine prepares iteration by moving all the vnodes to worker queue * called with mount lock held */ @@ -516,8 +547,8 @@ vnode_iterate_prepare(mount_t mp) if (TAILQ_EMPTY(&mp->mnt_vnodelist)) { /* nothing to do */ - return (0); - } + return 0; + } vp = TAILQ_FIRST(&mp->mnt_vnodelist); vp->v_mntvnodes.tqe_prev = &(mp->mnt_workerqueue.tqh_first); @@ -525,16 +556,17 @@ vnode_iterate_prepare(mount_t mp) mp->mnt_workerqueue.tqh_last = mp->mnt_vnodelist.tqh_last; TAILQ_INIT(&mp->mnt_vnodelist); - if (mp->mnt_newvnodes.tqh_first != NULL) + if (mp->mnt_newvnodes.tqh_first != NULL) { panic("vnode_iterate_prepare: newvnode when entering vnode"); + } TAILQ_INIT(&mp->mnt_newvnodes); - return (1); + return 1; } /* called with mount lock held */ -int +int vnode_iterate_reloadq(mount_t mp) { int moved = 0; @@ -543,12 +575,13 @@ vnode_iterate_reloadq(mount_t mp) if (!TAILQ_EMPTY(&mp->mnt_workerqueue)) { struct vnode * mvp; mvp = TAILQ_LAST(&mp->mnt_vnodelist, vnodelst); - + /* Joining the workerque entities to mount vnode list */ - if (mvp) + if (mvp) { mvp->v_mntvnodes.tqe_next = mp->mnt_workerqueue.tqh_first; - else + } else { mp->mnt_vnodelist.tqh_first = mp->mnt_workerqueue.tqh_first; + } mp->mnt_workerqueue.tqh_first->v_mntvnodes.tqe_prev = mp->mnt_vnodelist.tqh_last; mp->mnt_vnodelist.tqh_last = mp->mnt_workerqueue.tqh_last; TAILQ_INIT(&mp->mnt_workerqueue); @@ -558,19 +591,20 @@ vnode_iterate_reloadq(mount_t mp) if (!TAILQ_EMPTY(&mp->mnt_newvnodes)) { struct vnode * nlvp; nlvp = TAILQ_LAST(&mp->mnt_newvnodes, vnodelst); - + mp->mnt_newvnodes.tqh_first->v_mntvnodes.tqe_prev = &mp->mnt_vnodelist.tqh_first; nlvp->v_mntvnodes.tqe_next = mp->mnt_vnodelist.tqh_first; - if(mp->mnt_vnodelist.tqh_first) + if (mp->mnt_vnodelist.tqh_first) { mp->mnt_vnodelist.tqh_first->v_mntvnodes.tqe_prev = &nlvp->v_mntvnodes.tqe_next; - else + } else { mp->mnt_vnodelist.tqh_last = mp->mnt_newvnodes.tqh_last; + } mp->mnt_vnodelist.tqh_first = mp->mnt_newvnodes.tqh_first; TAILQ_INIT(&mp->mnt_newvnodes); moved = 1; } - return(moved); + return moved; } @@ -578,37 +612,89 @@ void vnode_iterate_clear(mount_t mp) { mp->mnt_lflag &= ~MNT_LITER; - if (mp->mnt_lflag & MNT_LITERWAIT) { - mp->mnt_lflag &= ~MNT_LITERWAIT; - wakeup(mp); - } } +#if !CONFIG_EMBEDDED + +#include + +struct vnode_iterate_panic_hook { + panic_hook_t hook; + mount_t mp; + struct vnode *vp; +}; + +static void +vnode_iterate_panic_hook(panic_hook_t *hook_) +{ + struct vnode_iterate_panic_hook *hook = (struct vnode_iterate_panic_hook *)hook_; + panic_phys_range_t range; + uint64_t phys; + + if (panic_phys_range_before(hook->mp, &phys, &range)) { + paniclog_append_noflush("mp = %p, phys = %p, prev (%p: %p-%p)\n", + hook->mp, phys, range.type, range.phys_start, + range.phys_start + range.len); + } else { + paniclog_append_noflush("mp = %p, phys = %p, prev (!)\n", hook->mp, phys); + } + + if (panic_phys_range_before(hook->vp, &phys, &range)) { + paniclog_append_noflush("vp = %p, phys = %p, prev (%p: %p-%p)\n", + hook->vp, phys, range.type, range.phys_start, + range.phys_start + range.len); + } else { + paniclog_append_noflush("vp = %p, phys = %p, prev (!)\n", hook->vp, phys); + } + panic_dump_mem((void *)(((vm_offset_t)hook->mp - 4096) & ~4095), 12288); +} +#endif //CONFIG_EMBEDDED int vnode_iterate(mount_t mp, int flags, int (*callout)(struct vnode *, void *), - void *arg) + void *arg) { struct vnode *vp; int vid, retval; int ret = 0; + /* + * The mount iterate mutex is held for the duration of the iteration. + * This can be done by a state flag on the mount structure but we can + * run into priority inversion issues sometimes. + * Using a mutex allows us to benefit from the priority donation + * mechanisms in the kernel for locks. This mutex should never be + * acquired in spin mode and it should be acquired before attempting to + * acquire the mount lock. + */ + mount_iterate_lock(mp); + mount_lock(mp); vnode_iterate_setup(mp); - /* it is returns 0 then there is nothing to do */ + /* If it returns 0 then there is nothing to do */ retval = vnode_iterate_prepare(mp); - if (retval == 0) { + if (retval == 0) { vnode_iterate_clear(mp); mount_unlock(mp); - return(ret); + mount_iterate_unlock(mp); + return ret; } - + +#if !CONFIG_EMBEDDED + struct vnode_iterate_panic_hook hook; + hook.mp = mp; + hook.vp = NULL; + panic_hook(&hook.hook, vnode_iterate_panic_hook); +#endif /* iterate over all the vnodes */ while (!TAILQ_EMPTY(&mp->mnt_workerqueue)) { vp = TAILQ_FIRST(&mp->mnt_workerqueue); +#if !CONFIG_EMBEDDED + hook.vp = vp; +#endif TAILQ_REMOVE(&mp->mnt_workerqueue, vp, v_mntvnodes); TAILQ_INSERT_TAIL(&mp->mnt_vnodelist, vp, v_mntvnodes); vid = vp->v_id; @@ -617,52 +703,56 @@ vnode_iterate(mount_t mp, int flags, int (*callout)(struct vnode *, void *), } mount_unlock(mp); - if ( vget_internal(vp, vid, (flags | VNODE_NODEAD| VNODE_WITHID | VNODE_NOSUSPEND))) { + if (vget_internal(vp, vid, (flags | VNODE_NODEAD | VNODE_WITHID | VNODE_NOSUSPEND))) { mount_lock(mp); - continue; + continue; } if (flags & VNODE_RELOAD) { - /* + /* * we're reloading the filesystem * cast out any inactive vnodes... */ - if (vnode_reload(vp)) { - /* vnode will be recycled on the refcount drop */ - vnode_put(vp); + if (vnode_reload(vp)) { + /* vnode will be recycled on the refcount drop */ + vnode_put(vp); mount_lock(mp); - continue; + continue; } } retval = callout(vp, arg); switch (retval) { - case VNODE_RETURNED: - case VNODE_RETURNED_DONE: - vnode_put(vp); - if (retval == VNODE_RETURNED_DONE) { + case VNODE_RETURNED: + case VNODE_RETURNED_DONE: + vnode_put(vp); + if (retval == VNODE_RETURNED_DONE) { mount_lock(mp); ret = 0; goto out; - } - break; + } + break; - case VNODE_CLAIMED_DONE: - mount_lock(mp); - ret = 0; - goto out; - case VNODE_CLAIMED: - default: - break; + case VNODE_CLAIMED_DONE: + mount_lock(mp); + ret = 0; + goto out; + case VNODE_CLAIMED: + default: + break; } mount_lock(mp); } out: +#if !CONFIG_EMBEDDED + panic_unhook(&hook.hook); +#endif (void)vnode_iterate_reloadq(mp); vnode_iterate_clear(mp); mount_unlock(mp); - return (ret); + mount_iterate_unlock(mp); + return ret; } void @@ -677,6 +767,18 @@ mount_unlock_renames(mount_t mp) lck_mtx_unlock(&mp->mnt_renamelock); } +void +mount_iterate_lock(mount_t mp) +{ + lck_mtx_lock(&mp->mnt_iter_lock); +} + +void +mount_iterate_unlock(mount_t mp) +{ + lck_mtx_unlock(&mp->mnt_iter_lock); +} + void mount_lock(mount_t mp) { @@ -699,29 +801,34 @@ mount_unlock(mount_t mp) void mount_ref(mount_t mp, int locked) { - if ( !locked) - mount_lock_spin(mp); - + if (!locked) { + mount_lock_spin(mp); + } + mp->mnt_count++; - if ( !locked) - mount_unlock(mp); + if (!locked) { + mount_unlock(mp); + } } void mount_drop(mount_t mp, int locked) { - if ( !locked) - mount_lock_spin(mp); - + if (!locked) { + mount_lock_spin(mp); + } + mp->mnt_count--; - if (mp->mnt_count == 0 && (mp->mnt_lflag & MNT_LDRAIN)) - wakeup(&mp->mnt_lflag); + if (mp->mnt_count == 0 && (mp->mnt_lflag & MNT_LDRAIN)) { + wakeup(&mp->mnt_lflag); + } - if ( !locked) - mount_unlock(mp); + if (!locked) { + mount_unlock(mp); + } } @@ -730,16 +837,18 @@ mount_iterref(mount_t mp, int locked) { int retval = 0; - if (!locked) + if (!locked) { mount_list_lock(); + } if (mp->mnt_iterref < 0) { retval = 1; } else { mp->mnt_iterref++; } - if (!locked) + if (!locked) { mount_list_unlock(); - return(retval); + } + return retval; } int @@ -747,15 +856,18 @@ mount_isdrained(mount_t mp, int locked) { int retval; - if (!locked) + if (!locked) { mount_list_lock(); - if (mp->mnt_iterref < 0) + } + if (mp->mnt_iterref < 0) { retval = 1; - else - retval = 0; - if (!locked) + } else { + retval = 0; + } + if (!locked) { mount_list_unlock(); - return(retval); + } + return retval; } void @@ -771,8 +883,9 @@ void mount_iterdrain(mount_t mp) { mount_list_lock(); - while (mp->mnt_iterref) + while (mp->mnt_iterref) { msleep((caddr_t)&mp->mnt_iterref, mnt_list_mtx_lock, PVFS, "mount_iterdrain", NULL); + } /* mount iterations drained */ mp->mnt_iterref = -1; mount_list_unlock(); @@ -781,36 +894,41 @@ void mount_iterreset(mount_t mp) { mount_list_lock(); - if (mp->mnt_iterref == -1) + if (mp->mnt_iterref == -1) { mp->mnt_iterref = 0; + } mount_list_unlock(); } /* always called with mount lock held */ -int +int mount_refdrain(mount_t mp) { - if (mp->mnt_lflag & MNT_LDRAIN) + if (mp->mnt_lflag & MNT_LDRAIN) { panic("already in drain"); + } mp->mnt_lflag |= MNT_LDRAIN; - while (mp->mnt_count) + while (mp->mnt_count) { msleep((caddr_t)&mp->mnt_lflag, &mp->mnt_mlock, PVFS, "mount_drain", NULL); + } - if (mp->mnt_vnodelist.tqh_first != NULL) - panic("mount_refdrain: dangling vnode"); + if (mp->mnt_vnodelist.tqh_first != NULL) { + panic("mount_refdrain: dangling vnode"); + } mp->mnt_lflag &= ~MNT_LDRAIN; - return(0); + return 0; } /* Tags the mount point as not supportine extended readdir for NFS exports */ -void -mount_set_noreaddirext(mount_t mp) { - mount_lock (mp); +void +mount_set_noreaddirext(mount_t mp) +{ + mount_lock(mp); mp->mnt_kern_flag |= MNTK_DENY_READDIREXT; - mount_unlock (mp); + mount_unlock(mp); } /* @@ -820,52 +938,48 @@ mount_set_noreaddirext(mount_t mp) { int vfs_busy(mount_t mp, int flags) { - restart: - if (mp->mnt_lflag & MNT_LDEAD) - return(ENOENT); - - if (mp->mnt_lflag & MNT_LUNMOUNT) { - if (flags & LK_NOWAIT) - return (ENOENT); + if (mp->mnt_lflag & MNT_LDEAD) { + return ENOENT; + } - mount_lock(mp); + mount_lock(mp); - if (mp->mnt_lflag & MNT_LDEAD) { - mount_unlock(mp); - return(ENOENT); - } - if (mp->mnt_lflag & MNT_LUNMOUNT) { - mp->mnt_lflag |= MNT_LWAIT; - /* - * Since all busy locks are shared except the exclusive - * lock granted when unmounting, the only place that a - * wakeup needs to be done is at the release of the - * exclusive lock at the end of dounmount. - */ - msleep((caddr_t)mp, &mp->mnt_mlock, (PVFS | PDROP), "vfsbusy", NULL); - return (ENOENT); + if (mp->mnt_lflag & MNT_LUNMOUNT) { + if (flags & LK_NOWAIT || mp->mnt_lflag & MNT_LDEAD) { + mount_unlock(mp); + return ENOENT; } - mount_unlock(mp); + + /* + * Since all busy locks are shared except the exclusive + * lock granted when unmounting, the only place that a + * wakeup needs to be done is at the release of the + * exclusive lock at the end of dounmount. + */ + mp->mnt_lflag |= MNT_LWAIT; + msleep((caddr_t)mp, &mp->mnt_mlock, (PVFS | PDROP), "vfsbusy", NULL); + return ENOENT; } + mount_unlock(mp); + lck_rw_lock_shared(&mp->mnt_rwlock); - /* - * until we are granted the rwlock, it's possible for the mount point to - * change state, so reevaluate before granting the vfs_busy + /* + * Until we are granted the rwlock, it's possible for the mount point to + * change state, so re-evaluate before granting the vfs_busy. */ if (mp->mnt_lflag & (MNT_LDEAD | MNT_LUNMOUNT)) { lck_rw_done(&mp->mnt_rwlock); goto restart; } - return (0); + return 0; } /* * Free a busy filesystem. */ - void vfs_unbusy(mount_t mp) { @@ -875,8 +989,8 @@ vfs_unbusy(mount_t mp) static void -vfs_rootmountfailed(mount_t mp) { - +vfs_rootmountfailed(mount_t mp) +{ mount_list_lock(); mp->mnt_vtable->vfc_refcount--; mount_list_unlock(); @@ -901,7 +1015,7 @@ vfs_rootmountfailed(mount_t mp) { static mount_t vfs_rootmountalloc_internal(struct vfstable *vfsp, const char *devname) { - mount_t mp; + mount_t mp; mp = _MALLOC_ZONE(sizeof(struct mount), M_MOUNT, M_WAITOK); bzero((char *)mp, sizeof(struct mount)); @@ -939,7 +1053,7 @@ vfs_rootmountalloc_internal(struct vfstable *vfsp, const char *devname) vfsp->vfc_refcount++; mount_list_unlock(); - strncpy(mp->mnt_vfsstat.f_fstypename, vfsp->vfc_name, MFSTYPENAMELEN); + strlcpy(mp->mnt_vfsstat.f_fstypename, vfsp->vfc_name, MFSTYPENAMELEN); mp->mnt_vfsstat.f_mntonname[0] = '/'; /* XXX const poisoning layering violation */ (void) copystr((const void *)devname, mp->mnt_vfsstat.f_mntfromname, MAXPATHLEN - 1, NULL); @@ -948,29 +1062,34 @@ vfs_rootmountalloc_internal(struct vfstable *vfsp, const char *devname) mac_mount_label_init(mp); mac_mount_label_associate(vfs_context_kernel(), mp); #endif - return (mp); + return mp; } errno_t vfs_rootmountalloc(const char *fstypename, const char *devname, mount_t *mpp) { - struct vfstable *vfsp; + struct vfstable *vfsp; - for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) - if (!strncmp(vfsp->vfc_name, fstypename, - sizeof(vfsp->vfc_name))) - break; - if (vfsp == NULL) - return (ENODEV); + for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) { + if (!strncmp(vfsp->vfc_name, fstypename, + sizeof(vfsp->vfc_name))) { + break; + } + } + if (vfsp == NULL) { + return ENODEV; + } *mpp = vfs_rootmountalloc_internal(vfsp, devname); - if (*mpp) - return (0); + if (*mpp) { + return 0; + } - return (ENOMEM); + return ENOMEM; } +#define DBG_MOUNTROOT (FSDBG_CODE(DBG_MOUNT, 0)) /* * Find an appropriate filesystem to use for the root. If a filesystem @@ -988,37 +1107,50 @@ vfs_mountroot(void) #endif struct vfstable *vfsp; vfs_context_t ctx = vfs_context_kernel(); - struct vfs_attr vfsattr; - int error; + struct vfs_attr vfsattr; + int error; mount_t mp; - vnode_t bdevvp_rootvp; + vnode_t bdevvp_rootvp; + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_START); if (mountroot != NULL) { /* * used for netboot which follows a different set of rules */ error = (*mountroot)(); - return (error); + + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_END, error, 0); + return error; } if ((error = bdevvp(rootdev, &rootvp))) { printf("vfs_mountroot: can't setup bdevvp\n"); - return (error); + + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_END, error, 1); + return error; } /* - * 4951998 - code we call in vfc_mountroot may replace rootvp + * 4951998 - code we call in vfc_mountroot may replace rootvp * so keep a local copy for some house keeping. */ bdevvp_rootvp = rootvp; for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) { - if (vfsp->vfc_mountroot == NULL) + if (vfsp->vfc_mountroot == NULL + && !ISSET(vfsp->vfc_vfsflags, VFC_VFSCANMOUNTROOT)) { continue; + } mp = vfs_rootmountalloc_internal(vfsp, "root_device"); mp->mnt_devvp = rootvp; - if ((error = (*vfsp->vfc_mountroot)(mp, rootvp, ctx)) == 0) { - if ( bdevvp_rootvp != rootvp ) { + if (vfsp->vfc_mountroot) { + error = (*vfsp->vfc_mountroot)(mp, rootvp, ctx); + } else { + error = VFS_MOUNT(mp, rootvp, 0, ctx); + } + + if (!error) { + if (bdevvp_rootvp != rootvp) { /* * rootvp changed... * bump the iocount and fix up mnt_devvp for the @@ -1029,8 +1161,8 @@ vfs_mountroot(void) vnode_getwithref(rootvp); mp->mnt_devvp = rootvp; - vnode_rele(bdevvp_rootvp); - vnode_put(bdevvp_rootvp); + vnode_rele(bdevvp_rootvp); + vnode_put(bdevvp_rootvp); } mp->mnt_devvp->v_specflags |= SI_MOUNTEDON; @@ -1046,6 +1178,10 @@ vfs_mountroot(void) */ vfs_init_io_attributes(rootvp, mp); + if (mp->mnt_ioflags & MNT_IOFLAGS_FUSION_DRIVE) { + root_is_CF_drive = TRUE; + } + /* * Shadow the VFC_VFSNATIVEXATTR flag to MNTK_EXTENDED_ATTRS. */ @@ -1056,6 +1192,18 @@ vfs_mountroot(void) mp->mnt_kern_flag |= MNTK_UNMOUNT_PREFLIGHT; } +#if !CONFIG_EMBEDDED + uint32_t speed; + + if (MNTK_VIRTUALDEV & mp->mnt_kern_flag) { + speed = 128; + } else if (disk_conditioner_mount_is_ssd(mp)) { + speed = 7 * 256; + } else { + speed = 256; + } + vc_progress_setdiskspeed(speed); +#endif /* * Probe root file system for additional features. */ @@ -1063,7 +1211,7 @@ vfs_mountroot(void) VFSATTR_INIT(&vfsattr); VFSATTR_WANTED(&vfsattr, f_capabilities); - if (vfs_getattr(mp, &vfsattr, ctx) == 0 && + if (vfs_getattr(mp, &vfsattr, ctx) == 0 && VFSATTR_IS_SUPPORTED(&vfsattr, f_capabilities)) { if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_EXTENDED_ATTR) && (vfsattr.f_capabilities.valid[VOL_CAPABILITIES_INTERFACES] & VOL_CAP_INT_EXTENDED_ATTR)) { @@ -1079,6 +1227,11 @@ vfs_mountroot(void) (vfsattr.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_PATH_FROM_ID)) { mp->mnt_kern_flag |= MNTK_PATH_FROM_ID; } + + if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_DIR_HARDLINKS) && + (vfsattr.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_DIR_HARDLINKS)) { + mp->mnt_kern_flag |= MNTK_DIR_HARDLINKS; + } } /* @@ -1090,8 +1243,10 @@ vfs_mountroot(void) vnode_put(rootvp); #if CONFIG_MACF - if ((vfs_flags(mp) & MNT_MULTILABEL) == 0) - return (0); + if ((vfs_flags(mp) & MNT_MULTILABEL) == 0) { + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_END, 0, 2); + return 0; + } error = VFS_ROOT(mp, &vp, ctx); if (error) { @@ -1113,85 +1268,180 @@ vfs_mountroot(void) goto fail; } #endif - return (0); + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_END, 0, 3); + return 0; } #if CONFIG_MACF fail: #endif vfs_rootmountfailed(mp); - - if (error != EINVAL) + + if (error != EINVAL) { printf("%s_mountroot failed: %d\n", vfsp->vfc_name, error); + } } - return (ENODEV); + KDBG_RELEASE(DBG_MOUNTROOT | DBG_FUNC_END, error ? error : ENODEV, 4); + return ENODEV; } /* - * Lookup a mount point by filesystem identifier. + * Mount the data volume of an ROSV volume group */ - -struct mount * -vfs_getvfs(fsid_t *fsid) -{ - return (mount_list_lookupby_fsid(fsid, 0, 0)); -} - -static struct mount * -vfs_getvfs_locked(fsid_t *fsid) +int +vfs_mount_rosv_data(void) { - return(mount_list_lookupby_fsid(fsid, 1, 0)); -} +#if CONFIG_ROSV_STARTUP + int error = 0; + int do_rosv_mounts = 0; -struct mount * -vfs_getvfs_by_mntonname(char *path) -{ - mount_t retmp = (mount_t)0; - mount_t mp; + error = vnode_get(rootvnode); + if (error) { + /* root must be mounted first */ + printf("vnode_get(rootvnode) failed with error %d\n", error); + return error; + } - mount_list_lock(); - TAILQ_FOREACH(mp, &mountlist, mnt_list) { - if (!strncmp(mp->mnt_vfsstat.f_mntonname, path, - sizeof(mp->mnt_vfsstat.f_mntonname))) { - retmp = mp; - if (mount_iterref(retmp, 1)) - retmp = NULL; - goto out; + printf("NOTE: Attempting ROSV mount\n"); + struct vfs_attr vfsattr; + VFSATTR_INIT(&vfsattr); + VFSATTR_WANTED(&vfsattr, f_capabilities); + if (vfs_getattr(rootvnode->v_mount, &vfsattr, vfs_context_kernel()) == 0 && + VFSATTR_IS_SUPPORTED(&vfsattr, f_capabilities)) { + if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_VOL_GROUPS) && + (vfsattr.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_VOL_GROUPS)) { + printf("NOTE: DETECTED ROSV CONFIG\n"); + do_rosv_mounts = 1; } } -out: - mount_list_unlock(); - return (retmp); -} -/* generation number for creation of new fsids */ -u_short mntid_gen = 0; -/* - * Get a new unique fsid + if (!do_rosv_mounts) { + vnode_put(rootvnode); + //bail out if config not supported + return 0; + } + + char datapath[] = PLATFORM_DATA_VOLUME_MOUNT_POINT; /* !const because of internal casting */ + + /* Mount the data volume */ + printf("attempting kernel mount for data volume... \n"); + error = kernel_mount(rootvnode->v_mount->mnt_vfsstat.f_fstypename, NULLVP, NULLVP, + datapath, (rootvnode->v_mount), 0, 0, (KERNEL_MOUNT_DATAVOL), vfs_context_kernel()); + + if (error) { + printf("Failed to mount data volume (%d)\n", error); + } + + vnode_put(rootvnode); + + return error; + +#else + return 0; +#endif +} + +/* + * Mount the VM volume of a container + */ +int +vfs_mount_vm(void) +{ +#if CONFIG_MOUNT_VM + int error = 0; + + error = vnode_get(rootvnode); + if (error) { + /* root must be mounted first */ + printf("vnode_get(rootvnode) failed with error %d\n", error); + return error; + } + + char vmpath[] = PLATFORM_VM_VOLUME_MOUNT_POINT; /* !const because of internal casting */ + + /* Mount the VM volume */ + printf("attempting kernel mount for vm volume... \n"); + error = kernel_mount(rootvnode->v_mount->mnt_vfsstat.f_fstypename, NULLVP, NULLVP, + vmpath, (rootvnode->v_mount), 0, 0, (KERNEL_MOUNT_VMVOL), vfs_context_kernel()); + + if (error) { + printf("Failed to mount vm volume (%d)\n", error); + } else { + printf("mounted VM volume\n"); + } + + vnode_put(rootvnode); + return error; +#else + return 0; +#endif +} + +/* + * Lookup a mount point by filesystem identifier. + */ + +struct mount * +vfs_getvfs(fsid_t *fsid) +{ + return mount_list_lookupby_fsid(fsid, 0, 0); +} + +static struct mount * +vfs_getvfs_locked(fsid_t *fsid) +{ + return mount_list_lookupby_fsid(fsid, 1, 0); +} + +struct mount * +vfs_getvfs_by_mntonname(char *path) +{ + mount_t retmp = (mount_t)0; + mount_t mp; + + mount_list_lock(); + TAILQ_FOREACH(mp, &mountlist, mnt_list) { + if (!strncmp(mp->mnt_vfsstat.f_mntonname, path, + sizeof(mp->mnt_vfsstat.f_mntonname))) { + retmp = mp; + if (mount_iterref(retmp, 1)) { + retmp = NULL; + } + goto out; + } + } +out: + mount_list_unlock(); + return retmp; +} + +/* generation number for creation of new fsids */ +u_short mntid_gen = 0; +/* + * Get a new unique fsid */ void vfs_getnewfsid(struct mount *mp) { - fsid_t tfsid; int mtype; - mount_t nmp; mount_list_lock(); /* generate a new fsid */ mtype = mp->mnt_vtable->vfc_typenum; - if (++mntid_gen == 0) + if (++mntid_gen == 0) { mntid_gen++; + } tfsid.val[0] = makedev(nblkdev + mtype, mntid_gen); tfsid.val[1] = mtype; - TAILQ_FOREACH(nmp, &mountlist, mnt_list) { - while (vfs_getvfs_locked(&tfsid)) { - if (++mntid_gen == 0) - mntid_gen++; - tfsid.val[0] = makedev(nblkdev + mtype, mntid_gen); + while (vfs_getvfs_locked(&tfsid)) { + if (++mntid_gen == 0) { + mntid_gen++; } + tfsid.val[0] = makedev(nblkdev + mtype, mntid_gen); } + mp->mnt_vfsstat.f_fsid.val[0] = tfsid.val[0]; mp->mnt_vfsstat.f_fsid.val[1] = tfsid.val[1]; mount_list_unlock(); @@ -1200,10 +1450,15 @@ vfs_getnewfsid(struct mount *mp) /* * Routines having to do with the management of the vnode table. */ -extern int (**dead_vnodeop_p)(void *); -long numvnodes, freevnodes, deadvnodes; +extern int(**dead_vnodeop_p)(void *); +long numvnodes, freevnodes, deadvnodes, async_work_vnodes; +int async_work_timed_out = 0; +int async_work_handled = 0; +int dead_vnode_wanted = 0; +int dead_vnode_waited = 0; + /* * Move a vnode from one mount queue to another. */ @@ -1214,9 +1469,10 @@ insmntque(vnode_t vp, mount_t mp) /* * Delete from old mount point vnode list, if on one. */ - if ( (lmp = vp->v_mount) != NULL && lmp != dead_mountp) { - if ((vp->v_lflag & VNAMED_MOUNT) == 0) + if ((lmp = vp->v_mount) != NULL && lmp != dead_mountp) { + if ((vp->v_lflag & VNAMED_MOUNT) == 0) { panic("insmntque: vp not in mount vnode list"); + } vp->v_lflag &= ~VNAMED_MOUNT; mount_lock_spin(lmp); @@ -1224,16 +1480,17 @@ insmntque(vnode_t vp, mount_t mp) mount_drop(lmp, 1); if (vp->v_mntvnodes.tqe_next == NULL) { - if (TAILQ_LAST(&lmp->mnt_vnodelist, vnodelst) == vp) + if (TAILQ_LAST(&lmp->mnt_vnodelist, vnodelst) == vp) { TAILQ_REMOVE(&lmp->mnt_vnodelist, vp, v_mntvnodes); - else if (TAILQ_LAST(&lmp->mnt_newvnodes, vnodelst) == vp) + } else if (TAILQ_LAST(&lmp->mnt_newvnodes, vnodelst) == vp) { TAILQ_REMOVE(&lmp->mnt_newvnodes, vp, v_mntvnodes); - else if (TAILQ_LAST(&lmp->mnt_workerqueue, vnodelst) == vp) + } else if (TAILQ_LAST(&lmp->mnt_workerqueue, vnodelst) == vp) { TAILQ_REMOVE(&lmp->mnt_workerqueue, vp, v_mntvnodes); - } else { + } + } else { vp->v_mntvnodes.tqe_next->v_mntvnodes.tqe_prev = vp->v_mntvnodes.tqe_prev; *vp->v_mntvnodes.tqe_prev = vp->v_mntvnodes.tqe_next; - } + } vp->v_mntvnodes.tqe_next = NULL; vp->v_mntvnodes.tqe_prev = NULL; mount_unlock(lmp); @@ -1245,14 +1502,17 @@ insmntque(vnode_t vp, mount_t mp) */ if ((vp->v_mount = mp) != NULL) { mount_lock_spin(mp); - if ((vp->v_mntvnodes.tqe_next != 0) && (vp->v_mntvnodes.tqe_prev != 0)) + if ((vp->v_mntvnodes.tqe_next != 0) && (vp->v_mntvnodes.tqe_prev != 0)) { panic("vp already in mount list"); - if (mp->mnt_lflag & MNT_LITER) + } + if (mp->mnt_lflag & MNT_LITER) { TAILQ_INSERT_HEAD(&mp->mnt_newvnodes, vp, v_mntvnodes); - else + } else { TAILQ_INSERT_HEAD(&mp->mnt_vnodelist, vp, v_mntvnodes); - if (vp->v_lflag & VNAMED_MOUNT) + } + if (vp->v_lflag & VNAMED_MOUNT) { panic("insmntque: vp already in mount vnode list"); + } vp->v_lflag |= VNAMED_MOUNT; mount_ref(mp, 1); mount_unlock(mp); @@ -1268,14 +1528,14 @@ insmntque(vnode_t vp, mount_t mp) int bdevvp(dev_t dev, vnode_t *vpp) { - vnode_t nvp; - int error; + vnode_t nvp; + int error; struct vnode_fsparam vfsp; struct vfs_context context; if (dev == NODEV) { *vpp = NULLVP; - return (ENODEV); + return ENODEV; } context.vc_thread = current_thread(); @@ -1296,41 +1556,41 @@ bdevvp(dev_t dev, vnode_t *vpp) vfsp.vnfs_marksystem = 0; vfsp.vnfs_markroot = 0; - if ( (error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp)) ) { + if ((error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp))) { *vpp = NULLVP; - return (error); + return error; } vnode_lock_spin(nvp); nvp->v_flag |= VBDEVVP; - nvp->v_tag = VT_NON; /* set this to VT_NON so during aliasing it can be replaced */ + nvp->v_tag = VT_NON; /* set this to VT_NON so during aliasing it can be replaced */ vnode_unlock(nvp); - if ( (error = vnode_ref(nvp)) ) { + if ((error = vnode_ref(nvp))) { panic("bdevvp failed: vnode_ref"); - return (error); + return error; } - if ( (error = VNOP_FSYNC(nvp, MNT_WAIT, &context)) ) { + if ((error = VNOP_FSYNC(nvp, MNT_WAIT, &context))) { panic("bdevvp failed: fsync"); - return (error); + return error; } - if ( (error = buf_invalidateblks(nvp, BUF_WRITE_DATA, 0, 0)) ) { + if ((error = buf_invalidateblks(nvp, BUF_WRITE_DATA, 0, 0))) { panic("bdevvp failed: invalidateblks"); - return (error); + return error; } #if CONFIG_MACF - /* + /* * XXXMAC: We can't put a MAC check here, the system will * panic without this vnode. */ -#endif /* MAC */ +#endif /* MAC */ - if ( (error = VNOP_OPEN(nvp, FREAD, &context)) ) { + if ((error = VNOP_OPEN(nvp, FREAD, &context))) { panic("bdevvp failed: open"); - return (error); + return error; } *vpp = nvp; - return (0); + return 0; } /* @@ -1355,7 +1615,7 @@ loop: for (vp = *vpp; vp; vp = vp->v_specnext) { if (nvp_rdev == vp->v_rdev && nvp->v_type == vp->v_type) { - vid = vp->v_id; + vid = vp->v_id; break; } } @@ -1363,8 +1623,8 @@ loop: if (vp) { found_alias: - if (vnode_getwithvid(vp,vid)) { - goto loop; + if (vnode_getwithvid(vp, vid)) { + goto loop; } /* * Termination state is checked in vnode_getwithvid @@ -1375,17 +1635,16 @@ found_alias: * Alias, but not in use, so flush it out. */ if ((vp->v_iocount == 1) && (vp->v_usecount == 0)) { - vnode_reclaim_internal(vp, 1, 1, 0); + vnode_reclaim_internal(vp, 1, 1, 0); vnode_put_locked(vp); vnode_unlock(vp); goto loop; } - } if (vp == NULL || vp->v_tag != VT_NON) { if (sin == NULL) { MALLOC_ZONE(sin, struct specinfo *, sizeof(struct specinfo), - M_SPECINFO, M_WAITOK); + M_SPECINFO, M_WAITOK); } nvp->v_specinfo = sin; @@ -1394,9 +1653,11 @@ found_alias: nvp->v_specflags = 0; nvp->v_speclastr = -1; nvp->v_specinfo->si_opencount = 0; + nvp->v_specinfo->si_initted = 0; + nvp->v_specinfo->si_throttleable = 0; SPECHASH_LOCK(); - + /* We dropped the lock, someone could have added */ if (vp == NULLVP) { for (vp = *vpp; vp; vp = vp->v_specnext) { @@ -1406,7 +1667,7 @@ found_alias: goto found_alias; } } - } + } nvp->v_hashchain = vpp; nvp->v_specnext = *vpp; @@ -1422,19 +1683,20 @@ found_alias: SPECHASH_UNLOCK(); } - return (NULLVP); + return NULLVP; } if (sin) { FREE_ZONE(sin, sizeof(struct specinfo), M_SPECINFO); } - if ((vp->v_flag & (VBDEVVP | VDEVFLUSH)) != 0) - return(vp); + if ((vp->v_flag & (VBDEVVP | VDEVFLUSH)) != 0) { + return vp; + } panic("checkalias with VT_NON vp that shouldn't: %p", vp); - return (vp); + return vp; } @@ -1455,17 +1717,18 @@ vget_internal(vnode_t vp, int vid, int vflags) vnode_lock_spin(vp); - if ((vflags & VNODE_WRITEABLE) && (vp->v_writecount == 0)) - /* - * vnode to be returned only if it has writers opened + if ((vflags & VNODE_WRITEABLE) && (vp->v_writecount == 0)) { + /* + * vnode to be returned only if it has writers opened */ - error = EINVAL; - else - error = vnode_getiocount(vp, vid, vflags); + error = EINVAL; + } else { + error = vnode_getiocount(vp, vid, vflags); + } vnode_unlock(vp); - return (error); + return error; } /* @@ -1475,8 +1738,7 @@ vget_internal(vnode_t vp, int vid, int vflags) int vnode_ref(vnode_t vp) { - - return (vnode_ref_ext(vp, 0, 0)); + return vnode_ref_ext(vp, 0, 0); } /* @@ -1486,7 +1748,7 @@ vnode_ref(vnode_t vp) int vnode_ref_ext(vnode_t vp, int fmode, int flags) { - int error = 0; + int error = 0; vnode_lock_spin(vp); @@ -1495,8 +1757,9 @@ vnode_ref_ext(vnode_t vp, int fmode, int flags) * taken an iocount, we can toughen this assert up and insist that the * iocount is non-zero... a non-zero usecount doesn't insure correctness */ - if (vp->v_iocount <= 0 && vp->v_usecount <= 0) + if (vp->v_iocount <= 0 && vp->v_usecount <= 0) { panic("vnode_ref_ext: vp %p has no valid reference %d, %d", vp, vp->v_iocount, vp->v_usecount); + } /* * if you are the owner of drain/termination, can acquire usecount @@ -1512,21 +1775,23 @@ vnode_ref_ext(vnode_t vp, int fmode, int flags) vp->v_usecount++; if (fmode & FWRITE) { - if (++vp->v_writecount <= 0) - panic("vnode_ref_ext: v_writecount"); + if (++vp->v_writecount <= 0) { + panic("vnode_ref_ext: v_writecount"); + } } if (fmode & O_EVTONLY) { - if (++vp->v_kusecount <= 0) - panic("vnode_ref_ext: v_kusecount"); + if (++vp->v_kusecount <= 0) { + panic("vnode_ref_ext: v_kusecount"); + } } if (vp->v_flag & VRAGE) { - struct uthread *ut; + struct uthread *ut; - ut = get_bsdthread_info(current_thread()); - - if ( !(current_proc()->p_lflag & P_LRAGE_VNODES) && - !(ut->uu_flag & UT_RAGE_VNODES)) { - /* + ut = get_bsdthread_info(current_thread()); + + if (!(current_proc()->p_lflag & P_LRAGE_VNODES) && + !(ut->uu_flag & UT_RAGE_VNODES)) { + /* * a 'normal' process accessed this vnode * so make sure its no longer marked * for rapid aging... also, make sure @@ -1540,7 +1805,6 @@ vnode_ref_ext(vnode_t vp, int fmode, int flags) } } if (vp->v_usecount == 1 && vp->v_type == VREG && !(vp->v_flag & VSYSTEM)) { - if (vp->v_ubcinfo) { vnode_lock_convert(vp); memory_object_mark_used(vp->v_ubcinfo->ui_control); @@ -1549,7 +1813,36 @@ vnode_ref_ext(vnode_t vp, int fmode, int flags) out: vnode_unlock(vp); - return (error); + return error; +} + + +boolean_t +vnode_on_reliable_media(vnode_t vp) +{ + if (!(vp->v_mount->mnt_kern_flag & MNTK_VIRTUALDEV) && (vp->v_mount->mnt_flag & MNT_LOCAL)) { + return TRUE; + } + return FALSE; +} + +static void +vnode_async_list_add(vnode_t vp) +{ + vnode_list_lock(); + + if (VONLIST(vp) || (vp->v_lflag & (VL_TERMINATE | VL_DEAD))) { + panic("vnode_async_list_add: %p is in wrong state", vp); + } + + TAILQ_INSERT_HEAD(&vnode_async_work_list, vp, v_freelist); + vp->v_listflag |= VLIST_ASYNC_WORK; + + async_work_vnodes++; + + vnode_list_unlock(); + + wakeup(&vnode_async_work_list); } @@ -1560,14 +1853,38 @@ out: static void vnode_list_add(vnode_t vp) { + boolean_t need_dead_wakeup = FALSE; + #if DIAGNOSTIC lck_mtx_assert(&vp->v_lock, LCK_MTX_ASSERT_OWNED); #endif + +again: + /* - * if it is already on a list or non zero references return + * if it is already on a list or non zero references return */ - if (VONLIST(vp) || (vp->v_usecount != 0) || (vp->v_iocount != 0) || (vp->v_lflag & VL_TERMINATE)) + if (VONLIST(vp) || (vp->v_usecount != 0) || (vp->v_iocount != 0) || (vp->v_lflag & VL_TERMINATE)) { return; + } + + /* + * In vclean, we might have deferred ditching locked buffers + * because something was still referencing them (indicated by + * usecount). We can ditch them now. + */ + if (ISSET(vp->v_lflag, VL_DEAD) + && (!LIST_EMPTY(&vp->v_cleanblkhd) || !LIST_EMPTY(&vp->v_dirtyblkhd))) { + ++vp->v_iocount; // Probably not necessary, but harmless +#ifdef JOE_DEBUG + record_vp(vp, 1); +#endif + vnode_unlock(vp); + buf_invalidateblks(vp, BUF_INVALIDATE_LOCKED, 0, 0); + vnode_lock(vp); + vnode_dropiocount(vp); + goto again; + } vnode_list_lock(); @@ -1575,10 +1892,11 @@ vnode_list_add(vnode_t vp) /* * add the new guy to the appropriate end of the RAGE list */ - if ((vp->v_flag & VAGE)) - TAILQ_INSERT_HEAD(&vnode_rage_list, vp, v_freelist); - else - TAILQ_INSERT_TAIL(&vnode_rage_list, vp, v_freelist); + if ((vp->v_flag & VAGE)) { + TAILQ_INSERT_HEAD(&vnode_rage_list, vp, v_freelist); + } else { + TAILQ_INSERT_TAIL(&vnode_rage_list, vp, v_freelist); + } vp->v_listflag |= VLIST_RAGE; ragevnodes++; @@ -1593,24 +1911,33 @@ vnode_list_add(vnode_t vp) */ microuptime(&rage_tv); } else { - /* + /* * if VL_DEAD, insert it at head of the dead list * else insert at tail of LRU list or at head if VAGE is set */ - if ( (vp->v_lflag & VL_DEAD)) { - TAILQ_INSERT_HEAD(&vnode_dead_list, vp, v_freelist); + if ((vp->v_lflag & VL_DEAD)) { + TAILQ_INSERT_HEAD(&vnode_dead_list, vp, v_freelist); vp->v_listflag |= VLIST_DEAD; deadvnodes++; + + if (dead_vnode_wanted) { + dead_vnode_wanted--; + need_dead_wakeup = TRUE; + } } else if ((vp->v_flag & VAGE)) { - TAILQ_INSERT_HEAD(&vnode_free_list, vp, v_freelist); + TAILQ_INSERT_HEAD(&vnode_free_list, vp, v_freelist); vp->v_flag &= ~VAGE; freevnodes++; } else { - TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist); + TAILQ_INSERT_TAIL(&vnode_free_list, vp, v_freelist); freevnodes++; } } vnode_list_unlock(); + + if (need_dead_wakeup == TRUE) { + wakeup_one((caddr_t)&dead_vnode_wanted); + } } @@ -1627,12 +1954,15 @@ vnode_list_remove_locked(vnode_t vp) * the v_listflag field is * protected by the vnode_list_lock */ - if (vp->v_listflag & VLIST_RAGE) - VREMRAGE("vnode_list_remove", vp); - else if (vp->v_listflag & VLIST_DEAD) - VREMDEAD("vnode_list_remove", vp); - else - VREMFREE("vnode_list_remove", vp); + if (vp->v_listflag & VLIST_RAGE) { + VREMRAGE("vnode_list_remove", vp); + } else if (vp->v_listflag & VLIST_DEAD) { + VREMDEAD("vnode_list_remove", vp); + } else if (vp->v_listflag & VLIST_ASYNC_WORK) { + VREMASYNC_WORK("vnode_list_remove", vp); + } else { + VREMFREE("vnode_list_remove", vp); + } } } @@ -1647,14 +1977,14 @@ vnode_list_remove(vnode_t vp) #if DIAGNOSTIC lck_mtx_assert(&vp->v_lock, LCK_MTX_ASSERT_OWNED); #endif - /* + /* * we want to avoid taking the list lock * in the case where we're not on the free * list... this will be true for most * directories and any currently in use files * * we're guaranteed that we can't go from - * the not-on-list state to the on-list + * the not-on-list state to the on-list * state since we hold the vnode lock... * all calls to vnode_list_add are done * under the vnode lock... so we can @@ -1662,12 +1992,12 @@ vnode_list_remove(vnode_t vp) * without taking the list lock */ if (VONLIST(vp)) { - vnode_list_lock(); + vnode_list_lock(); /* * however, we're not guaranteed that * we won't go from the on-list state * to the not-on-list state until we - * hold the vnode_list_lock... this + * hold the vnode_list_lock... this * is due to "new_vnode" removing vnodes * from the free list uder the list_lock * w/o the vnode lock... so we need to @@ -1684,69 +2014,79 @@ vnode_list_remove(vnode_t vp) void vnode_rele(vnode_t vp) { - vnode_rele_internal(vp, 0, 0, 0); + vnode_rele_internal(vp, 0, 0, 0); } void vnode_rele_ext(vnode_t vp, int fmode, int dont_reenter) { - vnode_rele_internal(vp, fmode, dont_reenter, 0); + vnode_rele_internal(vp, fmode, dont_reenter, 0); } void vnode_rele_internal(vnode_t vp, int fmode, int dont_reenter, int locked) { - - if ( !locked) - vnode_lock_spin(vp); + if (!locked) { + vnode_lock_spin(vp); + } #if DIAGNOSTIC - else + else { lck_mtx_assert(&vp->v_lock, LCK_MTX_ASSERT_OWNED); + } #endif - if (--vp->v_usecount < 0) - panic("vnode_rele_ext: vp %p usecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_usecount, vp->v_tag, vp->v_type, vp->v_flag); + if (--vp->v_usecount < 0) { + panic("vnode_rele_ext: vp %p usecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_usecount, vp->v_tag, vp->v_type, vp->v_flag); + } if (fmode & FWRITE) { - if (--vp->v_writecount < 0) - panic("vnode_rele_ext: vp %p writecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_writecount, vp->v_tag, vp->v_type, vp->v_flag); + if (--vp->v_writecount < 0) { + panic("vnode_rele_ext: vp %p writecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_writecount, vp->v_tag, vp->v_type, vp->v_flag); + } } if (fmode & O_EVTONLY) { - if (--vp->v_kusecount < 0) - panic("vnode_rele_ext: vp %p kusecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_kusecount, vp->v_tag, vp->v_type, vp->v_flag); + if (--vp->v_kusecount < 0) { + panic("vnode_rele_ext: vp %p kusecount -ve : %d. v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_kusecount, vp->v_tag, vp->v_type, vp->v_flag); + } + } + if (vp->v_kusecount > vp->v_usecount) { + panic("vnode_rele_ext: vp %p kusecount(%d) out of balance with usecount(%d). v_tag = %d, v_type = %d, v_flag = %x.", vp, vp->v_kusecount, vp->v_usecount, vp->v_tag, vp->v_type, vp->v_flag); } - if (vp->v_kusecount > vp->v_usecount) - panic("vnode_rele_ext: vp %p kusecount(%d) out of balance with usecount(%d). v_tag = %d, v_type = %d, v_flag = %x.",vp, vp->v_kusecount, vp->v_usecount, vp->v_tag, vp->v_type, vp->v_flag); if ((vp->v_iocount > 0) || (vp->v_usecount > 0)) { - /* + /* * vnode is still busy... if we're the last * usecount, mark for a future call to VNOP_INACTIVE * when the iocount finally drops to 0 */ - if (vp->v_usecount == 0) { - vp->v_lflag |= VL_NEEDINACTIVE; + if (vp->v_usecount == 0) { + vp->v_lflag |= VL_NEEDINACTIVE; vp->v_flag &= ~(VNOCACHE_DATA | VRAOFF | VOPENEVT); } goto done; } vp->v_flag &= ~(VNOCACHE_DATA | VRAOFF | VOPENEVT); - if ( (vp->v_lflag & (VL_TERMINATE | VL_DEAD)) || dont_reenter) { - /* + if (ISSET(vp->v_lflag, VL_TERMINATE | VL_DEAD) || dont_reenter) { + /* * vnode is being cleaned, or * we've requested that we don't reenter - * the filesystem on this release... in - * this case, we'll mark the vnode aged - * if it's been marked for termination + * the filesystem on this release...in + * the latter case, we'll mark the vnode aged */ - if (dont_reenter) { - if ( !(vp->v_lflag & (VL_TERMINATE | VL_DEAD | VL_MARKTERM)) ) - vp->v_lflag |= VL_NEEDINACTIVE; - vp->v_flag |= VAGE; + if (dont_reenter) { + if (!(vp->v_lflag & (VL_TERMINATE | VL_DEAD | VL_MARKTERM))) { + vp->v_lflag |= VL_NEEDINACTIVE; + + if (vnode_on_reliable_media(vp) == FALSE || vp->v_flag & VISDIRTY) { + vnode_async_list_add(vp); + goto done; + } + } + vp->v_flag |= VAGE; } - vnode_list_add(vp); + vnode_list_add(vp); goto done; } @@ -1760,7 +2100,7 @@ vnode_rele_internal(vnode_t vp, int fmode, int dont_reenter, int locked) #ifdef JOE_DEBUG record_vp(vp, 1); #endif - vp->v_lflag &= ~VL_NEEDINACTIVE; + vp->v_lflag &= ~VL_NEEDINACTIVE; vnode_unlock(vp); VNOP_INACTIVE(vp, vfs_context_current()); @@ -1775,32 +2115,32 @@ vnode_rele_internal(vnode_t vp, int fmode, int dont_reenter, int locked) * this point... if the reference counts are up, we'll pick * up the MARKTERM state when they get subsequently dropped */ - if ( (vp->v_iocount == 1) && (vp->v_usecount == 0) && - ((vp->v_lflag & (VL_MARKTERM | VL_TERMINATE | VL_DEAD)) == VL_MARKTERM)) { - struct uthread *ut; + if ((vp->v_iocount == 1) && (vp->v_usecount == 0) && + ((vp->v_lflag & (VL_MARKTERM | VL_TERMINATE | VL_DEAD)) == VL_MARKTERM)) { + struct uthread *ut; + + ut = get_bsdthread_info(current_thread()); - ut = get_bsdthread_info(current_thread()); - if (ut->uu_defer_reclaims) { - vp->v_defer_reclaimlist = ut->uu_vreclaims; + vp->v_defer_reclaimlist = ut->uu_vreclaims; ut->uu_vreclaims = vp; goto done; } vnode_lock_convert(vp); - vnode_reclaim_internal(vp, 1, 1, 0); + vnode_reclaim_internal(vp, 1, 1, 0); } vnode_dropiocount(vp); vnode_list_add(vp); done: if (vp->v_usecount == 0 && vp->v_type == VREG && !(vp->v_flag & VSYSTEM)) { - if (vp->v_ubcinfo) { vnode_lock_convert(vp); memory_object_mark_unused(vp->v_ubcinfo->ui_control, (vp->v_flag & VRAGE) == VRAGE); } } - if ( !locked) - vnode_unlock(vp); + if (!locked) { + vnode_unlock(vp); + } return; } @@ -1812,12 +2152,6 @@ done: * system error). If MNT_FORCE is specified, detach any active vnodes * that are found. */ -#if DIAGNOSTIC -int busyprt = 0; /* print out busy vnodes */ -#if 0 -struct ctldebug debug1 = { "busyprt", &busyprt }; -#endif /* 0 */ -#endif int vflush(struct mount *mp, struct vnode *skipvp, int flags) @@ -1827,6 +2161,12 @@ vflush(struct mount *mp, struct vnode *skipvp, int flags) int reclaimed = 0; int retval; unsigned int vid; + bool first_try = true; + + /* + * See comments in vnode_iterate() for the rationale for this lock + */ + mount_iterate_lock(mp); mount_lock(mp); vnode_iterate_setup(mp); @@ -1837,31 +2177,32 @@ vflush(struct mount *mp, struct vnode *skipvp, int flags) * tries unmounting every so often to see whether * it is still busy or not. */ - if (((flags & FORCECLOSE)==0) && ((mp->mnt_kern_flag & MNTK_UNMOUNT_PREFLIGHT) != 0)) { + if (((flags & FORCECLOSE) == 0) && ((mp->mnt_kern_flag & MNTK_UNMOUNT_PREFLIGHT) != 0)) { if (vnode_umount_preflight(mp, skipvp, flags)) { vnode_iterate_clear(mp); mount_unlock(mp); - return(EBUSY); + mount_iterate_unlock(mp); + return EBUSY; } } loop: - /* it is returns 0 then there is nothing to do */ + /* If it returns 0 then there is nothing to do */ retval = vnode_iterate_prepare(mp); - if (retval == 0) { + if (retval == 0) { vnode_iterate_clear(mp); mount_unlock(mp); - return(retval); + mount_iterate_unlock(mp); + return retval; } /* iterate over all the vnodes */ while (!TAILQ_EMPTY(&mp->mnt_workerqueue)) { - vp = TAILQ_FIRST(&mp->mnt_workerqueue); TAILQ_REMOVE(&mp->mnt_workerqueue, vp, v_mntvnodes); TAILQ_INSERT_TAIL(&mp->mnt_vnodelist, vp, v_mntvnodes); - if ( (vp->v_mount != mp) || (vp == skipvp)) { + if ((vp->v_mount != mp) || (vp == skipvp)) { continue; } vid = vp->v_id; @@ -1869,16 +2210,22 @@ loop: vnode_lock_spin(vp); - if ((vp->v_id != vid) || ((vp->v_lflag & (VL_DEAD | VL_TERMINATE)))) { - vnode_unlock(vp); - mount_lock(mp); - continue; + // If vnode is already terminating, wait for it... + while (vp->v_id == vid && ISSET(vp->v_lflag, VL_TERMINATE)) { + vp->v_lflag |= VL_TERMWANT; + msleep(&vp->v_lflag, &vp->v_lock, PVFS, "vflush", NULL); + } + + if ((vp->v_id != vid) || ISSET(vp->v_lflag, VL_DEAD)) { + vnode_unlock(vp); + mount_lock(mp); + continue; } /* * If requested, skip over vnodes marked VSYSTEM. * Skip over all vnodes marked VNOFLUSH. - */ + */ if ((flags & SKIPSYSTEM) && ((vp->v_flag & VSYSTEM) || (vp->v_flag & VNOFLUSH))) { vnode_unlock(vp); @@ -1917,9 +2264,8 @@ loop: */ if (((vp->v_usecount == 0) || ((vp->v_usecount - vp->v_kusecount) == 0))) { - vnode_lock_convert(vp); - vp->v_iocount++; /* so that drain waits for * other iocounts */ + vp->v_iocount++; /* so that drain waits for * other iocounts */ #ifdef JOE_DEBUG record_vp(vp, 1); #endif @@ -1941,10 +2287,11 @@ loop: vnode_lock_convert(vp); if (vp->v_type != VBLK && vp->v_type != VCHR) { - vp->v_iocount++; /* so that drain waits * for other iocounts */ + vp->v_iocount++; /* so that drain waits * for other iocounts */ #ifdef JOE_DEBUG record_vp(vp, 1); #endif + vnode_abort_advlocks(vp); vnode_reclaim_internal(vp, 1, 1, 0); vnode_dropiocount(vp); vnode_list_add(vp); @@ -1959,35 +2306,42 @@ loop: mount_lock(mp); continue; } -#if DIAGNOSTIC - if (busyprt) - vprint("vflush: busy vnode", vp); -#endif + + /* log vnodes blocking unforced unmounts */ + if (print_busy_vnodes && first_try && ((flags & FORCECLOSE) == 0)) { + vprint("vflush - busy vnode", vp); + } + vnode_unlock(vp); mount_lock(mp); busy++; } /* At this point the worker queue is completed */ - if (busy && ((flags & FORCECLOSE)==0) && reclaimed) { + if (busy && ((flags & FORCECLOSE) == 0) && reclaimed) { busy = 0; reclaimed = 0; (void)vnode_iterate_reloadq(mp); + first_try = false; /* returned with mount lock held */ goto loop; } /* if new vnodes were created in between retry the reclaim */ - if ( vnode_iterate_reloadq(mp) != 0) { - if (!(busy && ((flags & FORCECLOSE)==0))) + if (vnode_iterate_reloadq(mp) != 0) { + if (!(busy && ((flags & FORCECLOSE) == 0))) { + first_try = false; goto loop; + } } vnode_iterate_clear(mp); mount_unlock(mp); + mount_iterate_unlock(mp); - if (busy && ((flags & FORCECLOSE)==0)) - return (EBUSY); - return (0); + if (busy && ((flags & FORCECLOSE) == 0)) { + return EBUSY; + } + return 0; } long num_recycledvnodes = 0; @@ -2031,12 +2385,6 @@ vclean(vnode_t vp, int flags) vp->v_lflag |= VL_TERMINATE; - /* - * remove the vnode from any mount list - * it might be on... - */ - insmntque(vp, (struct mount *)0); - #if NAMEDSTREAMS is_namedstream = vnode_isnamedstream(vp); #endif @@ -2045,46 +2393,59 @@ vclean(vnode_t vp, int flags) OSAddAtomicLong(1, &num_recycledvnodes); - if (flags & DOCLOSE) + if (flags & DOCLOSE) { clflags |= IO_NDELAY; - if (flags & REVOKEALL) + } + if (flags & REVOKEALL) { clflags |= IO_REVOKE; - - if (active && (flags & DOCLOSE)) + } + + if (active && (flags & DOCLOSE)) { VNOP_CLOSE(vp, clflags, ctx); + } /* * Clean out any buffers associated with the vnode. */ if (flags & DOCLOSE) { #if NFSCLIENT - if (vp->v_tag == VT_NFS) + if (vp->v_tag == VT_NFS) { nfs_vinvalbuf(vp, V_SAVE, ctx, 0); - else + } else #endif { - VNOP_FSYNC(vp, MNT_WAIT, ctx); - buf_invalidateblks(vp, BUF_WRITE_DATA | BUF_INVALIDATE_LOCKED, 0, 0); + VNOP_FSYNC(vp, MNT_WAIT, ctx); + + /* + * If the vnode is still in use (by the journal for + * example) we don't want to invalidate locked buffers + * here. In that case, either the journal will tidy them + * up, or we will deal with it when the usecount is + * finally released in vnode_rele_internal. + */ + buf_invalidateblks(vp, BUF_WRITE_DATA | (active ? 0 : BUF_INVALIDATE_LOCKED), 0, 0); } - if (UBCINFOEXISTS(vp)) - /* + if (UBCINFOEXISTS(vp)) { + /* * Clean the pages in VM. */ - (void)ubc_msync(vp, (off_t)0, ubc_getsize(vp), NULL, UBC_PUSHALL | UBC_INVALIDATE | UBC_SYNC); + (void)ubc_msync(vp, (off_t)0, ubc_getsize(vp), NULL, UBC_PUSHALL | UBC_INVALIDATE | UBC_SYNC); + } } - if (active || need_inactive) + if (active || need_inactive) { VNOP_INACTIVE(vp, ctx); + } #if NAMEDSTREAMS if ((is_namedstream != 0) && (vp->v_parent != NULLVP)) { vnode_t pvp = vp->v_parent; - + /* Delete the shadow stream file before we reclaim its vnode */ if (vnode_isshadow(vp)) { - vnode_relenamedstream(pvp, vp, ctx); + vnode_relenamedstream(pvp, vp); } - - /* + + /* * No more streams associated with the parent. We * have a ref on it, so its identity is stable. * If the parent is on an opaque volume, then we need to know @@ -2102,6 +2463,8 @@ vclean(vnode_t vp, int flags) * Destroy ubc named reference * cluster_release is done on this path * along with dropping the reference on the ucred + * (and in the case of forced unmount of an mmap-ed file, + * the ubc reference on the vnode is dropped here too). */ ubc_destroy_named(vp); @@ -2109,35 +2472,46 @@ vclean(vnode_t vp, int flags) /* * cleanup trigger info from vnode (if any) */ - if (vp->v_resolve) + if (vp->v_resolve) { vnode_resolver_detach(vp); + } #endif /* * Reclaim the vnode. */ - if (VNOP_RECLAIM(vp, ctx)) + if (VNOP_RECLAIM(vp, ctx)) { panic("vclean: cannot reclaim"); - + } + // make sure the name & parent ptrs get cleaned out! - vnode_update_identity(vp, NULLVP, NULL, 0, 0, VNODE_UPDATE_PARENT | VNODE_UPDATE_NAME | VNODE_UPDATE_PURGE); + vnode_update_identity(vp, NULLVP, NULL, 0, 0, VNODE_UPDATE_PARENT | VNODE_UPDATE_NAME | VNODE_UPDATE_PURGE | VNODE_UPDATE_PURGEFIRMLINK); vnode_lock(vp); + /* + * Remove the vnode from any mount list it might be on. It is not + * safe to do this any earlier because unmount needs to wait for + * any vnodes to terminate and it cannot do that if it cannot find + * them. + */ + insmntque(vp, (struct mount *)0); + vp->v_mount = dead_mountp; vp->v_op = dead_vnodeop_p; vp->v_tag = VT_NON; vp->v_data = NULL; vp->v_lflag |= VL_DEAD; + vp->v_flag &= ~VISDIRTY; if (already_terminating == 0) { - vp->v_lflag &= ~VL_TERMINATE; + vp->v_lflag &= ~VL_TERMINATE; /* * Done with purge, notify sleepers of the grim news. */ if (vp->v_lflag & VL_TERMWANT) { - vp->v_lflag &= ~VL_TERMWANT; + vp->v_lflag &= ~VL_TERMWANT; wakeup(&vp->v_lflag); } } @@ -2158,8 +2532,9 @@ vn_revoke(vnode_t vp, __unused int flags, __unused vfs_context_t a_context) int vid; #if DIAGNOSTIC - if ((flags & REVOKEALL) == 0) + if ((flags & REVOKEALL) == 0) { panic("vnop_revoke"); + } #endif if (vnode_isaliased(vp)) { @@ -2167,8 +2542,9 @@ vn_revoke(vnode_t vp, __unused int flags, __unused vfs_context_t a_context) * If a vgone (or vclean) is already in progress, * return an immediate error */ - if (vp->v_lflag & VL_TERMINATE) - return(ENOENT); + if (vp->v_lflag & VL_TERMINATE) { + return ENOENT; + } /* * Ensure that vp will not be vgone'd while we @@ -2178,25 +2554,36 @@ vn_revoke(vnode_t vp, __unused int flags, __unused vfs_context_t a_context) while ((vp->v_specflags & SI_ALIASED)) { for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { if (vq->v_rdev != vp->v_rdev || - vq->v_type != vp->v_type || vp == vq) + vq->v_type != vp->v_type || vp == vq) { continue; + } vid = vq->v_id; SPECHASH_UNLOCK(); - if (vnode_getwithvid(vq,vid)){ - SPECHASH_LOCK(); + if (vnode_getwithvid(vq, vid)) { + SPECHASH_LOCK(); break; } - vnode_reclaim_internal(vq, 0, 1, 0); - vnode_put(vq); + vnode_lock(vq); + if (!(vq->v_lflag & VL_TERMINATE)) { + vnode_reclaim_internal(vq, 1, 1, 0); + } + vnode_put_locked(vq); + vnode_unlock(vq); SPECHASH_LOCK(); break; } } SPECHASH_UNLOCK(); } - vnode_reclaim_internal(vp, 0, 0, REVOKEALL); + vnode_lock(vp); + if (vp->v_lflag & VL_TERMINATE) { + vnode_unlock(vp); + return ENOENT; + } + vnode_reclaim_internal(vp, 1, 0, REVOKEALL); + vnode_unlock(vp); - return (0); + return 0; } /* @@ -2211,14 +2598,14 @@ vnode_recycle(struct vnode *vp) if (vp->v_iocount || vp->v_usecount) { vp->v_lflag |= VL_MARKTERM; vnode_unlock(vp); - return(0); - } + return 0; + } vnode_lock_convert(vp); vnode_reclaim_internal(vp, 1, 0, 0); vnode_unlock(vp); - return (1); + return 1; } static int @@ -2228,16 +2615,17 @@ vnode_reload(vnode_t vp) if ((vp->v_iocount > 1) || vp->v_usecount) { vnode_unlock(vp); - return(0); - } - if (vp->v_iocount <= 0) + return 0; + } + if (vp->v_iocount <= 0) { panic("vnode_reload with no iocount %d", vp->v_iocount); + } /* mark for release when iocount is dopped */ vp->v_lflag |= VL_MARKTERM; vnode_unlock(vp); - return (1); + return 1; } @@ -2259,41 +2647,47 @@ vgone(vnode_t vp, int flags) * if it is on one. */ if ((vp->v_type == VBLK || vp->v_type == VCHR) && vp->v_specinfo != 0) { - SPECHASH_LOCK(); - if (*vp->v_hashchain == vp) { - *vp->v_hashchain = vp->v_specnext; - } else { - for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { - if (vq->v_specnext != vp) - continue; - vq->v_specnext = vp->v_specnext; - break; + SPECHASH_LOCK(); + if (*vp->v_hashchain == vp) { + *vp->v_hashchain = vp->v_specnext; + } else { + for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { + if (vq->v_specnext != vp) { + continue; } - if (vq == NULL) - panic("missing bdev"); + vq->v_specnext = vp->v_specnext; + break; } - if (vp->v_specflags & SI_ALIASED) { - vx = NULL; - for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { - if (vq->v_rdev != vp->v_rdev || - vq->v_type != vp->v_type) - continue; - if (vx) - break; - vx = vq; - } - if (vx == NULL) - panic("missing alias"); - if (vq == NULL) - vx->v_specflags &= ~SI_ALIASED; - vp->v_specflags &= ~SI_ALIASED; + if (vq == NULL) { + panic("missing bdev"); } - SPECHASH_UNLOCK(); - { + } + if (vp->v_specflags & SI_ALIASED) { + vx = NULL; + for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { + if (vq->v_rdev != vp->v_rdev || + vq->v_type != vp->v_type) { + continue; + } + if (vx) { + break; + } + vx = vq; + } + if (vx == NULL) { + panic("missing alias"); + } + if (vq == NULL) { + vx->v_specflags &= ~SI_ALIASED; + } + vp->v_specflags &= ~SI_ALIASED; + } + SPECHASH_UNLOCK(); + { struct specinfo *tmp = vp->v_specinfo; vp->v_specinfo = NULL; - FREE_ZONE((void *)tmp, sizeof(struct specinfo), M_SPECINFO); - } + FREE_ZONE(tmp, sizeof(struct specinfo), M_SPECINFO); + } } } @@ -2303,31 +2697,35 @@ vgone(vnode_t vp, int flags) int check_mountedon(dev_t dev, enum vtype type, int *errorp) { - vnode_t vp; + vnode_t vp; int rc = 0; int vid; loop: SPECHASH_LOCK(); for (vp = speclisth[SPECHASH(dev)]; vp; vp = vp->v_specnext) { - if (dev != vp->v_rdev || type != vp->v_type) + if (dev != vp->v_rdev || type != vp->v_type) { continue; + } vid = vp->v_id; SPECHASH_UNLOCK(); - if (vnode_getwithvid(vp,vid)) + if (vnode_getwithvid(vp, vid)) { goto loop; + } vnode_lock_spin(vp); if ((vp->v_usecount > 0) || (vp->v_iocount > 1)) { vnode_unlock(vp); - if ((*errorp = vfs_mountedon(vp)) != 0) + if ((*errorp = vfs_mountedon(vp)) != 0) { rc = 1; - } else + } + } else { vnode_unlock(vp); + } vnode_put(vp); - return(rc); + return rc; } SPECHASH_UNLOCK(); - return (0); + return 0; } /* @@ -2340,9 +2738,14 @@ vcount(vnode_t vp) int count; int vid; + if (!vnode_isspec(vp)) { + return vp->v_usecount - vp->v_kusecount; + } + loop: - if (!vnode_isaliased(vp)) - return (vp->v_specinfo->si_opencount); + if (!vnode_isaliased(vp)) { + return vp->v_specinfo->si_opencount; + } count = 0; SPECHASH_LOCK(); @@ -2364,7 +2767,7 @@ loop: vnode_lock(vq); if (vq->v_rdev == vp->v_rdev && vq->v_type == vp->v_type) { - if ((vq->v_usecount == 0) && (vq->v_iocount == 1) && vq != vp) { + if ((vq->v_usecount == 0) && (vq->v_iocount == 1) && vq != vp) { /* * Alias, but not in use, so flush it out. */ @@ -2393,41 +2796,50 @@ loop: vq = vnext; } - return (count); + return count; } -int prtactive = 0; /* 1 => print out reclaim of active vnodes */ +int prtactive = 0; /* 1 => print out reclaim of active vnodes */ /* * Print out a description of a vnode. */ static const char *typename[] = - { "VNON", "VREG", "VDIR", "VBLK", "VCHR", "VLNK", "VSOCK", "VFIFO", "VBAD" }; +{ "VNON", "VREG", "VDIR", "VBLK", "VCHR", "VLNK", "VSOCK", "VFIFO", "VBAD" }; void vprint(const char *label, struct vnode *vp) { char sbuf[64]; - if (label != NULL) + if (label != NULL) { printf("%s: ", label); - printf("type %s, usecount %d, writecount %d", - typename[vp->v_type], vp->v_usecount, vp->v_writecount); + } + printf("name %s type %s, usecount %d, writecount %d\n", + vp->v_name, typename[vp->v_type], + vp->v_usecount, vp->v_writecount); sbuf[0] = '\0'; - if (vp->v_flag & VROOT) + if (vp->v_flag & VROOT) { strlcat(sbuf, "|VROOT", sizeof(sbuf)); - if (vp->v_flag & VTEXT) + } + if (vp->v_flag & VTEXT) { strlcat(sbuf, "|VTEXT", sizeof(sbuf)); - if (vp->v_flag & VSYSTEM) + } + if (vp->v_flag & VSYSTEM) { strlcat(sbuf, "|VSYSTEM", sizeof(sbuf)); - if (vp->v_flag & VNOFLUSH) + } + if (vp->v_flag & VNOFLUSH) { strlcat(sbuf, "|VNOFLUSH", sizeof(sbuf)); - if (vp->v_flag & VBWAIT) + } + if (vp->v_flag & VBWAIT) { strlcat(sbuf, "|VBWAIT", sizeof(sbuf)); - if (vnode_isaliased(vp)) + } + if (vnode_isaliased(vp)) { strlcat(sbuf, "|VALIASED", sizeof(sbuf)); - if (sbuf[0] != '\0') - printf(" flags (%s)", &sbuf[1]); + } + if (sbuf[0] != '\0') { + printf("vnode flags (%s\n", &sbuf[1]); + } } @@ -2443,6 +2855,65 @@ vn_getpath_fsenter(struct vnode *vp, char *pathbuf, int *len) return build_path(vp, pathbuf, *len, len, 0, vfs_context_current()); } +/* + * vn_getpath_fsenter_with_parent will reenter the file system to fine the path of the + * vnode. It requires that there are IO counts on both the vnode and the directory vnode. + * + * vn_getpath_fsenter is called by MAC hooks to authorize operations for every thing, but + * unlink, rmdir and rename. For these operation the MAC hook calls vn_getpath. This presents + * problems where if the path can not be found from the name cache, those operations can + * erroneously fail with EPERM even though the call should succeed. When removing or moving + * file system objects with operations such as unlink or rename, those operations need to + * take IO counts on the target and containing directory. Calling vn_getpath_fsenter from a + * MAC hook from these operations during forced unmount operations can lead to dead + * lock. This happens when the operation starts, IO counts are taken on the containing + * directories and targets. Before the MAC hook is called a forced unmount from another + * thread takes place and blocks on the on going operation's directory vnode in vdrain. + * After which, the MAC hook gets called and calls vn_getpath_fsenter. vn_getpath_fsenter + * is called with the understanding that there is an IO count on the target. If in + * build_path the directory vnode is no longer in the cache, then the parent object id via + * vnode_getattr from the target is obtain and used to call VFS_VGET to get the parent + * vnode. The file system's VFS_VGET then looks up by inode in its hash and tries to get + * an IO count. But VFS_VGET "sees" the directory vnode is in vdrain and can block + * depending on which version and how it calls the vnode_get family of interfaces. + * + * N.B. A reasonable interface to use is vnode_getwithvid. This interface was modified to + * call vnode_getiocount with VNODE_DRAINO, so it will happily get an IO count and not + * cause issues, but there is no guarantee that all or any file systems are doing that. + * + * vn_getpath_fsenter_with_parent can enter the file system safely since there is a known + * IO count on the directory vnode by calling build_path_with_parent. + */ + +int +vn_getpath_fsenter_with_parent(struct vnode *dvp, struct vnode *vp, char *pathbuf, int *len) +{ + return build_path_with_parent(vp, dvp, pathbuf, *len, len, 0, vfs_context_current()); +} + +int +vn_getpath_ext(struct vnode *vp, struct vnode *dvp, char *pathbuf, int *len, int flags) +{ + int bpflags = (flags & VN_GETPATH_FSENTER) ? 0 : BUILDPATH_NO_FS_ENTER; + + if (flags && (flags != VN_GETPATH_FSENTER)) { + if (flags & VN_GETPATH_NO_FIRMLINK) { + bpflags |= BUILDPATH_NO_FIRMLINK;; + } + if (flags & VN_GETPATH_VOLUME_RELATIVE) { + bpflags |= (BUILDPATH_VOLUME_RELATIVE | BUILDPATH_NO_FIRMLINK); + } + } + + return build_path_with_parent(vp, dvp, pathbuf, *len, len, bpflags, vfs_context_current()); +} + +int +vn_getpath_no_firmlink(struct vnode *vp, char *pathbuf, int *len) +{ + return vn_getpath_ext(vp, NULLVP, pathbuf, len, VN_GETPATH_NO_FIRMLINK); +} + int vn_getcdhash(struct vnode *vp, off_t offset, unsigned char *cdhash) { @@ -2450,14 +2921,14 @@ vn_getcdhash(struct vnode *vp, off_t offset, unsigned char *cdhash) } -static char *extension_table=NULL; +static char *extension_table = NULL; static int nexts; static int max_ext_width; static int extension_cmp(const void *a, const void *b) { - return (strlen((const char *)a) - strlen((const char *)b)); + return strlen((const char *)a) - strlen((const char *)b); } @@ -2478,143 +2949,145 @@ extern lck_mtx_t *pkg_extensions_lck; __private_extern__ int set_package_extensions_table(user_addr_t data, int nentries, int maxwidth) { - char *new_exts, *old_exts; - int error; - - if (nentries <= 0 || nentries > 1024 || maxwidth <= 0 || maxwidth > 255) { - return EINVAL; - } - - - // allocate one byte extra so we can guarantee null termination - MALLOC(new_exts, char *, (nentries * maxwidth) + 1, M_TEMP, M_WAITOK); - if (new_exts == NULL) { - return ENOMEM; - } - - error = copyin(data, new_exts, nentries * maxwidth); - if (error) { - FREE(new_exts, M_TEMP); - return error; - } + char *new_exts, *old_exts; + int error; + + if (nentries <= 0 || nentries > 1024 || maxwidth <= 0 || maxwidth > 255) { + return EINVAL; + } + + + // allocate one byte extra so we can guarantee null termination + MALLOC(new_exts, char *, (nentries * maxwidth) + 1, M_TEMP, M_WAITOK); + if (new_exts == NULL) { + return ENOMEM; + } - new_exts[(nentries * maxwidth)] = '\0'; // guarantee null termination of the block + error = copyin(data, new_exts, nentries * maxwidth); + if (error) { + FREE(new_exts, M_TEMP); + return error; + } - qsort(new_exts, nentries, maxwidth, extension_cmp); + new_exts[(nentries * maxwidth)] = '\0'; // guarantee null termination of the block - lck_mtx_lock(pkg_extensions_lck); + qsort(new_exts, nentries, maxwidth, extension_cmp); - old_exts = extension_table; - extension_table = new_exts; - nexts = nentries; - max_ext_width = maxwidth; + lck_mtx_lock(pkg_extensions_lck); - lck_mtx_unlock(pkg_extensions_lck); + old_exts = extension_table; + extension_table = new_exts; + nexts = nentries; + max_ext_width = maxwidth; - if (old_exts) { - FREE(old_exts, M_TEMP); - } + lck_mtx_unlock(pkg_extensions_lck); - return 0; + if (old_exts) { + FREE(old_exts, M_TEMP); + } + + return 0; } -__private_extern__ int +int is_package_name(const char *name, int len) { - int i, extlen; - const char *ptr, *name_ext; - - if (len <= 3) { - return 0; - } + int i, extlen; + const char *ptr, *name_ext; - name_ext = NULL; - for(ptr=name; *ptr != '\0'; ptr++) { - if (*ptr == '.') { - name_ext = ptr; + if (len <= 3) { + return 0; } - } - // if there is no "." extension, it can't match - if (name_ext == NULL) { - return 0; - } + name_ext = NULL; + for (ptr = name; *ptr != '\0'; ptr++) { + if (*ptr == '.') { + name_ext = ptr; + } + } + + // if there is no "." extension, it can't match + if (name_ext == NULL) { + return 0; + } - // advance over the "." - name_ext++; + // advance over the "." + name_ext++; - lck_mtx_lock(pkg_extensions_lck); + lck_mtx_lock(pkg_extensions_lck); - // now iterate over all the extensions to see if any match - ptr = &extension_table[0]; - for(i=0; i < nexts; i++, ptr+=max_ext_width) { - extlen = strlen(ptr); - if (strncasecmp(name_ext, ptr, extlen) == 0 && name_ext[extlen] == '\0') { - // aha, a match! - lck_mtx_unlock(pkg_extensions_lck); - return 1; + // now iterate over all the extensions to see if any match + ptr = &extension_table[0]; + for (i = 0; i < nexts; i++, ptr += max_ext_width) { + extlen = strlen(ptr); + if (strncasecmp(name_ext, ptr, extlen) == 0 && name_ext[extlen] == '\0') { + // aha, a match! + lck_mtx_unlock(pkg_extensions_lck); + return 1; + } } - } - lck_mtx_unlock(pkg_extensions_lck); + lck_mtx_unlock(pkg_extensions_lck); - // if we get here, no extension matched - return 0; + // if we get here, no extension matched + return 0; } int vn_path_package_check(__unused vnode_t vp, char *path, int pathlen, int *component) { - char *ptr, *end; - int comp=0; - - *component = -1; - if (*path != '/') { - return EINVAL; - } + char *ptr, *end; + int comp = 0; - end = path + 1; - while(end < path + pathlen && *end != '\0') { - while(end < path + pathlen && *end == '/' && *end != '\0') { - end++; + *component = -1; + if (*path != '/') { + return EINVAL; } - ptr = end; + end = path + 1; + while (end < path + pathlen && *end != '\0') { + while (end < path + pathlen && *end == '/' && *end != '\0') { + end++; + } - while(end < path + pathlen && *end != '/' && *end != '\0') { - end++; - } + ptr = end; - if (end > path + pathlen) { - // hmm, string wasn't null terminated - return EINVAL; - } + while (end < path + pathlen && *end != '/' && *end != '\0') { + end++; + } - *end = '\0'; - if (is_package_name(ptr, end - ptr)) { - *component = comp; - break; - } + if (end > path + pathlen) { + // hmm, string wasn't null terminated + return EINVAL; + } + + *end = '\0'; + if (is_package_name(ptr, end - ptr)) { + *component = comp; + break; + } - end++; - comp++; - } + end++; + comp++; + } - return 0; + return 0; } -/* +/* * Determine if a name is inappropriate for a searchfs query. * This list consists of /System currently. */ -int vn_searchfs_inappropriate_name(const char *name, int len) { +int +vn_searchfs_inappropriate_name(const char *name, int len) +{ const char *bad_names[] = { "System" }; int bad_len[] = { 6 }; int i; - for(i=0; i < (int) (sizeof(bad_names) / sizeof(bad_names[0])); i++) { + for (i = 0; i < (int) (sizeof(bad_names) / sizeof(bad_names[0])); i++) { if (len == bad_len[i] && strncmp(name, bad_names[i], strlen(bad_names[i]) + 1) == 0) { return 1; } @@ -2629,131 +3102,140 @@ int vn_searchfs_inappropriate_name(const char *name, int len) { */ extern unsigned int vfs_nummntops; +/* + * The VFS_NUMMNTOPS shouldn't be at name[1] since + * is a VFS generic variable. Since we no longer support + * VT_UFS, we reserve its value to support this sysctl node. + * + * It should have been: + * name[0]: VFS_GENERIC + * name[1]: VFS_NUMMNTOPS + */ +SYSCTL_INT(_vfs, VFS_NUMMNTOPS, nummntops, + CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, + &vfs_nummntops, 0, ""); + +int +vfs_sysctl(int *name __unused, u_int namelen __unused, + user_addr_t oldp __unused, size_t *oldlenp __unused, + user_addr_t newp __unused, size_t newlen __unused, proc_t p __unused); + int -vfs_sysctl(int *name, u_int namelen, user_addr_t oldp, size_t *oldlenp, - user_addr_t newp, size_t newlen, proc_t p) +vfs_sysctl(int *name __unused, u_int namelen __unused, + user_addr_t oldp __unused, size_t *oldlenp __unused, + user_addr_t newp __unused, size_t newlen __unused, proc_t p __unused) { - struct vfstable *vfsp; - int *username; - u_int usernamelen; - int error; - struct vfsconf vfsc; + return EINVAL; +} - /* All non VFS_GENERIC and in VFS_GENERIC, - * VFS_MAXTYPENUM, VFS_CONF, VFS_SET_PACKAGE_EXTS - * needs to have root priv to have modifiers. - * For rest the userland_sysctl(CTLFLAG_ANYBODY) would cover. - */ - if ((newp != USER_ADDR_NULL) && ((name[0] != VFS_GENERIC) || - ((name[1] == VFS_MAXTYPENUM) || - (name[1] == VFS_CONF) || - (name[1] == VFS_SET_PACKAGE_EXTS))) - && (error = suser(kauth_cred_get(), &p->p_acflag))) { - return(error); - } - /* - * The VFS_NUMMNTOPS shouldn't be at name[0] since - * is a VFS generic variable. So now we must check - * namelen so we don't end up covering any UFS - * variables (sinc UFS vfc_typenum is 1). - * - * It should have been: - * name[0]: VFS_GENERIC - * name[1]: VFS_NUMMNTOPS - */ - if (namelen == 1 && name[0] == VFS_NUMMNTOPS) { - return (sysctl_rdint(oldp, oldlenp, newp, vfs_nummntops)); - } - /* all sysctl names at this level are at least name and field */ - if (namelen < 2) - return (EISDIR); /* overloaded */ - if (name[0] != VFS_GENERIC) { +// +// The following code disallows specific sysctl's that came through +// the direct sysctl interface (vfs_sysctl_node) instead of the newer +// sysctl_vfs_ctlbyfsid() interface. We can not allow these selectors +// through vfs_sysctl_node() because it passes the user's oldp pointer +// directly to the file system which (for these selectors) casts it +// back to a struct sysctl_req and then proceed to use SYSCTL_IN() +// which jumps through an arbitrary function pointer. When called +// through the sysctl_vfs_ctlbyfsid() interface this does not happen +// and so it's safe. +// +// Unfortunately we have to pull in definitions from AFP and SMB and +// perform explicit name checks on the file system to determine if +// these selectors are being used. +// - mount_list_lock(); - for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) - if (vfsp->vfc_typenum == name[0]) { - vfsp->vfc_refcount++; - break; - } - mount_list_unlock(); +#define AFPFS_VFS_CTL_GETID 0x00020001 +#define AFPFS_VFS_CTL_NETCHANGE 0x00020002 +#define AFPFS_VFS_CTL_VOLCHANGE 0x00020003 - if (vfsp == NULL) - return (ENOTSUP); +#define SMBFS_SYSCTL_REMOUNT 1 +#define SMBFS_SYSCTL_REMOUNT_INFO 2 +#define SMBFS_SYSCTL_GET_SERVER_SHARE 3 - /* XXX current context proxy for proc p? */ - error = ((*vfsp->vfc_vfsops->vfs_sysctl)(&name[1], namelen - 1, - oldp, oldlenp, newp, newlen, - vfs_context_current())); - mount_list_lock(); - vfsp->vfc_refcount--; - mount_list_unlock(); - return error; +static int +is_bad_sysctl_name(struct vfstable *vfsp, int selector_name) +{ + switch (selector_name) { + case VFS_CTL_QUERY: + case VFS_CTL_TIMEO: + case VFS_CTL_NOLOCKS: + case VFS_CTL_NSTATUS: + case VFS_CTL_SADDR: + case VFS_CTL_DISC: + case VFS_CTL_SERVERINFO: + return 1; + + default: + break; } - switch (name[1]) { - case VFS_MAXTYPENUM: - return (sysctl_rdint(oldp, oldlenp, newp, maxvfsconf)); - case VFS_CONF: - if (namelen < 3) - return (ENOTDIR); /* overloaded */ - mount_list_lock(); - for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) - if (vfsp->vfc_typenum == name[2]) - break; + // the more complicated check for some of SMB's special values + if (strcmp(vfsp->vfc_name, "smbfs") == 0) { + switch (selector_name) { + case SMBFS_SYSCTL_REMOUNT: + case SMBFS_SYSCTL_REMOUNT_INFO: + case SMBFS_SYSCTL_GET_SERVER_SHARE: + return 1; + } + } else if (strcmp(vfsp->vfc_name, "afpfs") == 0) { + switch (selector_name) { + case AFPFS_VFS_CTL_GETID: + case AFPFS_VFS_CTL_NETCHANGE: + case AFPFS_VFS_CTL_VOLCHANGE: + return 1; + } + } + + // + // If we get here we passed all the checks so the selector is ok + // + return 0; +} + + +int vfs_sysctl_node SYSCTL_HANDLER_ARGS +{ + int *name, namelen; + struct vfstable *vfsp; + int error; + int fstypenum; + + fstypenum = oidp->oid_number; + name = arg1; + namelen = arg2; - if (vfsp == NULL) { - mount_list_unlock(); - return (ENOTSUP); + /* all sysctl names at this level should have at least one name slot for the FS */ + if (namelen < 1) { + return EISDIR; /* overloaded */ + } + mount_list_lock(); + for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) { + if (vfsp->vfc_typenum == fstypenum) { + vfsp->vfc_refcount++; + break; } + } + mount_list_unlock(); - vfsc.vfc_reserved1 = 0; - bcopy(vfsp->vfc_name, vfsc.vfc_name, sizeof(vfsc.vfc_name)); - vfsc.vfc_typenum = vfsp->vfc_typenum; - vfsc.vfc_refcount = vfsp->vfc_refcount; - vfsc.vfc_flags = vfsp->vfc_flags; - vfsc.vfc_reserved2 = 0; - vfsc.vfc_reserved3 = 0; + if (vfsp == NULL) { + return ENOTSUP; + } - mount_list_unlock(); - return (sysctl_rdstruct(oldp, oldlenp, newp, &vfsc, - sizeof(struct vfsconf))); - - case VFS_SET_PACKAGE_EXTS: - return set_package_extensions_table((user_addr_t)((unsigned)name[1]), name[2], name[3]); + if (is_bad_sysctl_name(vfsp, name[0])) { + printf("vfs: bad selector 0x%.8x for old-style sysctl(). use the sysctl-by-fsid interface instead\n", name[0]); + return EPERM; } - /* - * We need to get back into the general MIB, so we need to re-prepend - * CTL_VFS to our name and try userland_sysctl(). - */ - usernamelen = namelen + 1; - MALLOC(username, int *, usernamelen * sizeof(*username), - M_TEMP, M_WAITOK); - bcopy(name, username + 1, namelen * sizeof(*name)); - username[0] = CTL_VFS; - error = userland_sysctl(p, username, usernamelen, oldp, - oldlenp, newp, newlen, oldlenp); - FREE(username, M_TEMP); - return (error); -} -/* - * Dump vnode list (via sysctl) - defunct - * use "pstat" instead - */ -/* ARGSUSED */ -int -sysctl_vnode -(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, __unused struct sysctl_req *req) -{ - return(EINVAL); -} + error = (vfsp->vfc_vfsops->vfs_sysctl)(name, namelen, req->oldptr, &req->oldlen, req->newptr, req->newlen, vfs_context_current()); -SYSCTL_PROC(_kern, KERN_VNODE, vnode, - CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MASKED | CTLFLAG_LOCKED, - 0, 0, sysctl_vnode, "S,", ""); + mount_list_lock(); + vfsp->vfc_refcount--; + mount_list_unlock(); + return error; +} /* * Check to see if a filesystem is mounted on a block device. @@ -2772,8 +3254,9 @@ vfs_mountedon(struct vnode *vp) if (vp->v_specflags & SI_ALIASED) { for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) { if (vq->v_rdev != vp->v_rdev || - vq->v_type != vp->v_type) + vq->v_type != vp->v_type) { continue; + } if (vq->v_specflags & SI_MOUNTEDON) { error = EBUSY; break; @@ -2782,45 +3265,79 @@ vfs_mountedon(struct vnode *vp) } out: SPECHASH_UNLOCK(); - return (error); + return error; +} + +struct unmount_info { + int u_errs; // Total failed unmounts + int u_busy; // EBUSY failed unmounts +}; + +static int +unmount_callback(mount_t mp, void *arg) +{ + int error; + char *mntname; + struct unmount_info *uip = arg; + + mount_ref(mp, 0); + mount_iterdrop(mp); // avoid vfs_iterate deadlock in dounmount() + + MALLOC_ZONE(mntname, void *, MAXPATHLEN, M_NAMEI, M_WAITOK); + if (mntname) { + strlcpy(mntname, mp->mnt_vfsstat.f_mntonname, MAXPATHLEN); + } + + error = dounmount(mp, MNT_FORCE, 1, vfs_context_current()); + if (error) { + uip->u_errs++; + printf("Unmount of %s failed (%d)\n", mntname ? mntname:"?", error); + if (error == EBUSY) { + uip->u_busy++; + } + } + if (mntname) { + FREE_ZONE(mntname, MAXPATHLEN, M_NAMEI); + } + + return VFS_RETURNED; } /* * Unmount all filesystems. The list is traversed in reverse order * of mounting to avoid dependencies. + * Busy mounts are retried. */ __private_extern__ void vfs_unmountall(void) { - struct mount *mp; - int error; + int mounts, sec = 1; + struct unmount_info ui; - /* - * Since this only runs when rebooting, it is not interlocked. - */ - mount_list_lock(); - while(!TAILQ_EMPTY(&mountlist)) { - mp = TAILQ_LAST(&mountlist, mntlist); - mount_list_unlock(); - error = dounmount(mp, MNT_FORCE, 0, vfs_context_current()); - if ((error != 0) && (error != EBUSY)) { - printf("unmount of %s failed (", mp->mnt_vfsstat.f_mntonname); - printf("%d)\n", error); - mount_list_lock(); - TAILQ_REMOVE(&mountlist, mp, mnt_list); - continue; - } else if (error == EBUSY) { - /* If EBUSY is returned, the unmount was already in progress */ - printf("unmount of %p failed (", mp); - printf("BUSY)\n"); - } - mount_list_lock(); + vfs_unmountall_started = 1; + +retry: + ui.u_errs = ui.u_busy = 0; + vfs_iterate(VFS_ITERATE_CB_DROPREF | VFS_ITERATE_TAIL_FIRST, unmount_callback, &ui); + mounts = mount_getvfscnt(); + if (mounts == 0) { + return; } - mount_list_unlock(); -} + if (ui.u_busy > 0) { // Busy mounts - wait & retry + tsleep(&nummounts, PVFS, "busy mount", sec * hz); + sec *= 2; + if (sec <= 32) { + goto retry; + } + printf("Unmounting timed out\n"); + } else if (ui.u_errs < mounts) { + // If the vfs_iterate missed mounts in progress - wait a bit + tsleep(&nummounts, PVFS, "missed mount", 2 * hz); + } +} -/* +/* * This routine is called from vnode_pager_deallocate out of the VM * The path to vnode_pager_deallocate can only be initiated by ubc_destroy_named * on a vnode that has a UBCINFO @@ -2828,11 +3345,28 @@ vfs_unmountall(void) __private_extern__ void vnode_pager_vrele(vnode_t vp) { - struct ubc_info *uip; + struct ubc_info *uip; vnode_lock_spin(vp); vp->v_lflag &= ~VNAMED_UBC; + if (vp->v_usecount != 0) { + /* + * At the eleventh hour, just before the ubcinfo is + * destroyed, ensure the ubc-specific v_usecount + * reference has gone. We use v_usecount != 0 as a hint; + * ubc_unmap() does nothing if there's no mapping. + * + * This case is caused by coming here via forced unmount, + * versus the usual vm_object_deallocate() path. + * In the forced unmount case, ubc_destroy_named() + * releases the pager before memory_object_last_unmap() + * can be called. + */ + vnode_unlock(vp); + ubc_unmap(vp); + vnode_lock_spin(vp); + } uip = vp->v_ubcinfo; vp->v_ubcinfo = UBC_INFO_NULL; @@ -2847,24 +3381,33 @@ vnode_pager_vrele(vnode_t vp) u_int32_t rootunit = (u_int32_t)-1; +#if CONFIG_IOSCHED +extern int lowpri_throttle_enabled; +extern int iosched_enabled; +#endif + errno_t vfs_init_io_attributes(vnode_t devvp, mount_t mp) { - int error; - off_t readblockcnt = 0; - off_t writeblockcnt = 0; - off_t readmaxcnt = 0; - off_t writemaxcnt = 0; - off_t readsegcnt = 0; - off_t writesegcnt = 0; - off_t readsegsize = 0; - off_t writesegsize = 0; - off_t alignment = 0; - off_t ioqueue_depth = 0; + int error; + off_t readblockcnt = 0; + off_t writeblockcnt = 0; + off_t readmaxcnt = 0; + off_t writemaxcnt = 0; + off_t readsegcnt = 0; + off_t writesegcnt = 0; + off_t readsegsize = 0; + off_t writesegsize = 0; + off_t alignment = 0; + u_int32_t minsaturationbytecount = 0; + u_int32_t ioqueue_depth = 0; u_int32_t blksize; u_int64_t temp; u_int32_t features; + u_int64_t location = 0; vfs_context_t ctx = vfs_context_current(); + dk_corestorage_info_t cs_info; + boolean_t cs_present = FALSE;; int isssd = 0; int isvirtual = 0; @@ -2876,8 +3419,9 @@ vfs_init_io_attributes(vnode_t devvp, mount_t mp) */ mp->mnt_devbsdunit = num_trailing_0(mp->mnt_throttle_mask); - if (devvp == rootvp) + if (devvp == rootvp) { rootunit = mp->mnt_devbsdunit; + } if (mp->mnt_devbsdunit == rootunit) { /* @@ -2896,8 +3440,9 @@ vfs_init_io_attributes(vnode_t devvp, mount_t mp) if ((error = VNOP_IOCTL(devvp, DKIOCGETBLOCKSIZE, - (caddr_t)&blksize, 0, ctx))) - return (error); + (caddr_t)&blksize, 0, ctx))) { + return error; + } mp->mnt_devblocksize = blksize; @@ -2908,138 +3453,210 @@ vfs_init_io_attributes(vnode_t devvp, mount_t mp) * and if those advertised constraints result in a smaller * limit for a given I/O */ - mp->mnt_maxreadcnt = MAX_UPL_SIZE * PAGE_SIZE; - mp->mnt_maxwritecnt = MAX_UPL_SIZE * PAGE_SIZE; + mp->mnt_maxreadcnt = MAX_UPL_SIZE_BYTES; + mp->mnt_maxwritecnt = MAX_UPL_SIZE_BYTES; if (VNOP_IOCTL(devvp, DKIOCISVIRTUAL, (caddr_t)&isvirtual, 0, ctx) == 0) { - if (isvirtual) - mp->mnt_kern_flag |= MNTK_VIRTUALDEV; + if (isvirtual) { + mp->mnt_kern_flag |= MNTK_VIRTUALDEV; + mp->mnt_flag |= MNT_REMOVABLE; + } } if (VNOP_IOCTL(devvp, DKIOCISSOLIDSTATE, (caddr_t)&isssd, 0, ctx) == 0) { - if (isssd) - mp->mnt_kern_flag |= MNTK_SSD; + if (isssd) { + mp->mnt_kern_flag |= MNTK_SSD; + } } if ((error = VNOP_IOCTL(devvp, DKIOCGETFEATURES, - (caddr_t)&features, 0, ctx))) - return (error); + (caddr_t)&features, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXBLOCKCOUNTREAD, - (caddr_t)&readblockcnt, 0, ctx))) - return (error); + (caddr_t)&readblockcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXBLOCKCOUNTWRITE, - (caddr_t)&writeblockcnt, 0, ctx))) - return (error); + (caddr_t)&writeblockcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXBYTECOUNTREAD, - (caddr_t)&readmaxcnt, 0, ctx))) - return (error); + (caddr_t)&readmaxcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXBYTECOUNTWRITE, - (caddr_t)&writemaxcnt, 0, ctx))) - return (error); + (caddr_t)&writemaxcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXSEGMENTCOUNTREAD, - (caddr_t)&readsegcnt, 0, ctx))) - return (error); + (caddr_t)&readsegcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXSEGMENTCOUNTWRITE, - (caddr_t)&writesegcnt, 0, ctx))) - return (error); + (caddr_t)&writesegcnt, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXSEGMENTBYTECOUNTREAD, - (caddr_t)&readsegsize, 0, ctx))) - return (error); + (caddr_t)&readsegsize, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMAXSEGMENTBYTECOUNTWRITE, - (caddr_t)&writesegsize, 0, ctx))) - return (error); + (caddr_t)&writesegsize, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETMINSEGMENTALIGNMENTBYTECOUNT, - (caddr_t)&alignment, 0, ctx))) - return (error); + (caddr_t)&alignment, 0, ctx))) { + return error; + } if ((error = VNOP_IOCTL(devvp, DKIOCGETCOMMANDPOOLSIZE, - (caddr_t)&ioqueue_depth, 0, ctx))) - return (error); + (caddr_t)&ioqueue_depth, 0, ctx))) { + return error; + } - if (readmaxcnt) + if (readmaxcnt) { mp->mnt_maxreadcnt = (readmaxcnt > UINT32_MAX) ? UINT32_MAX : readmaxcnt; + } if (readblockcnt) { temp = readblockcnt * blksize; temp = (temp > UINT32_MAX) ? UINT32_MAX : temp; - if (temp < mp->mnt_maxreadcnt) + if (temp < mp->mnt_maxreadcnt) { mp->mnt_maxreadcnt = (u_int32_t)temp; + } } - if (writemaxcnt) + if (writemaxcnt) { mp->mnt_maxwritecnt = (writemaxcnt > UINT32_MAX) ? UINT32_MAX : writemaxcnt; + } if (writeblockcnt) { temp = writeblockcnt * blksize; temp = (temp > UINT32_MAX) ? UINT32_MAX : temp; - if (temp < mp->mnt_maxwritecnt) + if (temp < mp->mnt_maxwritecnt) { mp->mnt_maxwritecnt = (u_int32_t)temp; + } } if (readsegcnt) { - temp = (readsegcnt > UINT16_MAX) ? UINT16_MAX : readsegcnt; + temp = (readsegcnt > UINT16_MAX) ? UINT16_MAX : readsegcnt; } else { temp = mp->mnt_maxreadcnt / PAGE_SIZE; - if (temp > UINT16_MAX) + if (temp > UINT16_MAX) { temp = UINT16_MAX; + } } mp->mnt_segreadcnt = (u_int16_t)temp; if (writesegcnt) { - temp = (writesegcnt > UINT16_MAX) ? UINT16_MAX : writesegcnt; + temp = (writesegcnt > UINT16_MAX) ? UINT16_MAX : writesegcnt; } else { temp = mp->mnt_maxwritecnt / PAGE_SIZE; - if (temp > UINT16_MAX) + if (temp > UINT16_MAX) { temp = UINT16_MAX; + } } mp->mnt_segwritecnt = (u_int16_t)temp; - if (readsegsize) - temp = (readsegsize > UINT32_MAX) ? UINT32_MAX : readsegsize; - else - temp = mp->mnt_maxreadcnt; + if (readsegsize) { + temp = (readsegsize > UINT32_MAX) ? UINT32_MAX : readsegsize; + } else { + temp = mp->mnt_maxreadcnt; + } mp->mnt_maxsegreadsize = (u_int32_t)temp; - if (writesegsize) - temp = (writesegsize > UINT32_MAX) ? UINT32_MAX : writesegsize; - else - temp = mp->mnt_maxwritecnt; + if (writesegsize) { + temp = (writesegsize > UINT32_MAX) ? UINT32_MAX : writesegsize; + } else { + temp = mp->mnt_maxwritecnt; + } mp->mnt_maxsegwritesize = (u_int32_t)temp; - if (alignment) - temp = (alignment > PAGE_SIZE) ? PAGE_MASK : alignment - 1; - else - temp = 0; + if (alignment) { + temp = (alignment > PAGE_SIZE) ? PAGE_MASK : alignment - 1; + } else { + temp = 0; + } mp->mnt_alignmentmask = temp; - if (ioqueue_depth > MNT_DEFAULT_IOQUEUE_DEPTH) + if (ioqueue_depth > MNT_DEFAULT_IOQUEUE_DEPTH) { temp = ioqueue_depth; - else + } else { temp = MNT_DEFAULT_IOQUEUE_DEPTH; + } mp->mnt_ioqueue_depth = temp; - mp->mnt_ioscale = (mp->mnt_ioqueue_depth + (MNT_DEFAULT_IOQUEUE_DEPTH - 1)) / MNT_DEFAULT_IOQUEUE_DEPTH; + mp->mnt_ioscale = MNT_IOSCALE(mp->mnt_ioqueue_depth); + + if (mp->mnt_ioscale > 1) { + printf("ioqueue_depth = %d, ioscale = %d\n", (int)mp->mnt_ioqueue_depth, (int)mp->mnt_ioscale); + } + + if (features & DK_FEATURE_FORCE_UNIT_ACCESS) { + mp->mnt_ioflags |= MNT_IOFLAGS_FUA_SUPPORTED; + } + + if (VNOP_IOCTL(devvp, DKIOCGETIOMINSATURATIONBYTECOUNT, (caddr_t)&minsaturationbytecount, 0, ctx) == 0) { + mp->mnt_minsaturationbytecount = minsaturationbytecount; + } else { + mp->mnt_minsaturationbytecount = 0; + } + + if (VNOP_IOCTL(devvp, DKIOCCORESTORAGE, (caddr_t)&cs_info, 0, ctx) == 0) { + cs_present = TRUE; + } + + if (features & DK_FEATURE_UNMAP) { + mp->mnt_ioflags |= MNT_IOFLAGS_UNMAP_SUPPORTED; + + if (cs_present == TRUE) { + mp->mnt_ioflags |= MNT_IOFLAGS_CSUNMAP_SUPPORTED; + } + } + if (cs_present == TRUE) { + /* + * for now we'll use the following test as a proxy for + * the underlying drive being FUSION in nature + */ + if ((cs_info.flags & DK_CORESTORAGE_PIN_YOUR_METADATA)) { + mp->mnt_ioflags |= MNT_IOFLAGS_FUSION_DRIVE; + } + } else { + /* Check for APFS Fusion */ + dk_apfs_flavour_t flavour; + if ((VNOP_IOCTL(devvp, DKIOCGETAPFSFLAVOUR, (caddr_t)&flavour, 0, ctx) == 0) && + (flavour == DK_APFS_FUSION)) { + mp->mnt_ioflags |= MNT_IOFLAGS_FUSION_DRIVE; + } + } - if (mp->mnt_ioscale > 1) - printf("ioqueue_depth = %d, ioscale = %d\n", (int)mp->mnt_ioqueue_depth, (int)mp->mnt_ioscale); + if (VNOP_IOCTL(devvp, DKIOCGETLOCATION, (caddr_t)&location, 0, ctx) == 0) { + if (location & DK_LOCATION_EXTERNAL) { + mp->mnt_ioflags |= MNT_IOFLAGS_PERIPHERAL_DRIVE; + mp->mnt_flag |= MNT_REMOVABLE; + } + } - if (features & DK_FEATURE_FORCE_UNIT_ACCESS) - mp->mnt_ioflags |= MNT_IOFLAGS_FUA_SUPPORTED; - if (features & DK_FEATURE_UNMAP) - mp->mnt_ioflags |= MNT_IOFLAGS_UNMAP_SUPPORTED; - return (error); +#if CONFIG_IOSCHED + if (iosched_enabled && (features & DK_FEATURE_PRIORITY)) { + mp->mnt_ioflags |= MNT_IOFLAGS_IOSCHED_SUPPORTED; + throttle_info_disable_throttle(mp->mnt_devbsdunit, (mp->mnt_ioflags & MNT_IOFLAGS_FUSION_DRIVE) != 0); + } +#endif /* CONFIG_IOSCHED */ + return error; } static struct klist fs_klist; @@ -3049,15 +3666,27 @@ lck_mtx_t *fs_klist_lock; void vfs_event_init(void) { - klist_init(&fs_klist); fs_klist_lck_grp = lck_grp_alloc_init("fs_klist", NULL); fs_klist_lock = lck_mtx_alloc_init(fs_klist_lck_grp, NULL); } void -vfs_event_signal(__unused fsid_t *fsid, u_int32_t event, __unused intptr_t data) -{ +vfs_event_signal(fsid_t *fsid, u_int32_t event, intptr_t data) +{ + if (event == VQ_DEAD || event == VQ_NOTRESP) { + struct mount *mp = vfs_getvfs(fsid); + if (mp) { + mount_lock_spin(mp); + if (data) { + mp->mnt_kern_flag &= ~MNT_LNOTRESP; // Now responding + } else { + mp->mnt_kern_flag |= MNT_LNOTRESP; // Not responding + } + mount_unlock(mp); + } + } + lck_mtx_lock(fs_klist_lock); KNOTE(&fs_klist, event); lck_mtx_unlock(fs_klist_lock); @@ -3069,7 +3698,7 @@ vfs_event_signal(__unused fsid_t *fsid, u_int32_t event, __unused intptr_t data) static int sysctl_vfs_getvfscnt(void) { - return(mount_getvfscnt()); + return mount_getvfscnt(); } @@ -3081,8 +3710,7 @@ mount_getvfscnt(void) mount_list_lock(); ret = nummounts; mount_list_unlock(); - return (ret); - + return ret; } @@ -3091,7 +3719,7 @@ static int mount_fillfsids(fsid_t *fsidlst, int count) { struct mount *mp; - int actual=0; + int actual = 0; actual = 0; mount_list_lock(); @@ -3102,8 +3730,7 @@ mount_fillfsids(fsid_t *fsidlst, int count) } } mount_list_unlock(); - return (actual); - + return actual; } /* @@ -3122,24 +3749,26 @@ sysctl_vfs_getvfslist(fsid_t *fsidlst, int count, int *actual) mount_list_lock(); TAILQ_FOREACH(mp, &mountlist, mnt_list) { (*actual)++; - if (*actual <= count) + if (*actual <= count) { fsidlst[(*actual) - 1] = mp->mnt_vfsstat.f_fsid; + } } mount_list_unlock(); - return (*actual <= count ? 0 : ENOMEM); + return *actual <= count ? 0 : ENOMEM; } static int sysctl_vfs_vfslist(__unused struct sysctl_oid *oidp, __unused void *arg1, - __unused int arg2, struct sysctl_req *req) + __unused int arg2, struct sysctl_req *req) { int actual, error; size_t space; fsid_t *fsidlst; /* This is a readonly node. */ - if (req->newptr != USER_ADDR_NULL) - return (EPERM); + if (req->newptr != USER_ADDR_NULL) { + return EPERM; + } /* they are querying us so just return the space required. */ if (req->oldptr == USER_ADDR_NULL) { @@ -3155,12 +3784,13 @@ again: req->oldlen = sysctl_vfs_getvfscnt() * sizeof(fsid_t); /* they didn't give us enough space. */ - if (space < req->oldlen) - return (ENOMEM); + if (space < req->oldlen) { + return ENOMEM; + } - MALLOC(fsidlst, fsid_t *, req->oldlen, M_TEMP, M_WAITOK); + MALLOC(fsidlst, fsid_t *, req->oldlen, M_TEMP, M_WAITOK | M_ZERO); if (fsidlst == NULL) { - return (ENOMEM); + return ENOMEM; } error = sysctl_vfs_getvfslist(fsidlst, req->oldlen / sizeof(fsid_t), @@ -3178,7 +3808,7 @@ again: error = SYSCTL_OUT(req, fsidlst, actual * sizeof(fsid_t)); } FREE(fsidlst, M_TEMP); - return (error); + return error; } /* @@ -3186,15 +3816,15 @@ again: */ static int sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, - struct sysctl_req *req) + struct sysctl_req *req) { union union_vfsidctl vc; struct mount *mp; struct vfsstatfs *sp; int *name, flags, namelen; - int error=0, gotref=0; + int error = 0, gotref = 0; vfs_context_t ctx = vfs_context_current(); - proc_t p = req->p; /* XXX req->p != current_proc()? */ + proc_t p = req->p; /* XXX req->p != current_proc()? */ boolean_t is_64_bit; name = arg1; @@ -3202,8 +3832,9 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, is_64_bit = proc_is64bit(p); error = SYSCTL_IN(req, &vc, is_64_bit? sizeof(vc.vc64):sizeof(vc.vc32)); - if (error) + if (error) { goto out; + } if (vc.vc32.vc_vers != VFS_CTL_VERS1) { /* works for 32 and 64 */ error = EINVAL; goto out; @@ -3226,17 +3857,15 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, if (vfs_64bitready(mp)) { error = mp->mnt_op->vfs_sysctl(name, namelen, CAST_USER_ADDR_T(req), - NULL, USER_ADDR_NULL, 0, + NULL, USER_ADDR_NULL, 0, ctx); - } - else { + } else { error = ENOTSUP; } - } - else { + } else { error = mp->mnt_op->vfs_sysctl(name, namelen, CAST_USER_ADDR_T(req), - NULL, USER_ADDR_NULL, 0, + NULL, USER_ADDR_NULL, 0, ctx); } if (error != ENOTSUP) { @@ -3249,14 +3878,14 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, if (is_64_bit) { req->newptr = vc.vc64.vc_ptr; req->newlen = (size_t)vc.vc64.vc_len; - } - else { + } else { req->newptr = CAST_USER_ADDR_T(vc.vc32.vc_ptr); req->newlen = vc.vc32.vc_len; } error = SYSCTL_IN(req, &flags, sizeof(flags)); - if (error) + if (error) { break; + } mount_ref(mp, 0); mount_iterdrop(mp); @@ -3269,18 +3898,19 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, if (is_64_bit) { req->newptr = vc.vc64.vc_ptr; req->newlen = (size_t)vc.vc64.vc_len; - } - else { + } else { req->newptr = CAST_USER_ADDR_T(vc.vc32.vc_ptr); req->newlen = vc.vc32.vc_len; } error = SYSCTL_IN(req, &flags, sizeof(flags)); - if (error) + if (error) { break; + } sp = &mp->mnt_vfsstat; if (((flags & MNT_NOWAIT) == 0 || (flags & (MNT_WAIT | MNT_DWAIT))) && - (error = vfs_update_vfsstat(mp, ctx, VFS_USER_EVENT))) + (error = vfs_update_vfsstat(mp, ctx, VFS_USER_EVENT))) { goto out; + } if (is_64_bit) { struct user64_statfs sfs; bzero(&sfs, sizeof(sfs)); @@ -3295,18 +3925,19 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, sfs.f_ffree = (user64_long_t)sp->f_ffree; sfs.f_fsid = sp->f_fsid; sfs.f_owner = sp->f_owner; - +#ifdef NFSCLIENT if (mp->mnt_kern_flag & MNTK_TYPENAME_OVERRIDE) { - strlcpy(&sfs.f_fstypename[0], &mp->fstypename_override[0], MFSTYPENAMELEN); - } else { + strlcpy(&sfs.f_fstypename[0], &mp->fstypename_override[0], MFSNAMELEN); + } else +#endif + { strlcpy(sfs.f_fstypename, sp->f_fstypename, MFSNAMELEN); } strlcpy(sfs.f_mntonname, sp->f_mntonname, MNAMELEN); strlcpy(sfs.f_mntfromname, sp->f_mntfromname, MNAMELEN); - + error = SYSCTL_OUT(req, &sfs, sizeof(sfs)); - } - else { + } else { struct user32_statfs sfs; bzero(&sfs, sizeof(sfs)); sfs.f_flags = mp->mnt_flag & MNT_VISFLAGMASK; @@ -3318,7 +3949,7 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, * to reflect the filesystem size as best we can. */ if (sp->f_blocks > INT_MAX) { - int shift; + int shift; /* * Work out how far we have to shift the block count down to make it fit. @@ -3330,12 +3961,14 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, * being smaller than f_bsize. */ for (shift = 0; shift < 32; shift++) { - if ((sp->f_blocks >> shift) <= INT_MAX) + if ((sp->f_blocks >> shift) <= INT_MAX) { break; - if ((((long long)sp->f_bsize) << (shift + 1)) > INT_MAX) + } + if ((((long long)sp->f_bsize) << (shift + 1)) > INT_MAX) { break; + } } -#define __SHIFT_OR_CLIP(x, s) ((((x) >> (s)) > INT_MAX) ? INT_MAX : ((x) >> (s))) +#define __SHIFT_OR_CLIP(x, s) ((((x) >> (s)) > INT_MAX) ? INT_MAX : ((x) >> (s))) sfs.f_blocks = (user32_long_t)__SHIFT_OR_CLIP(sp->f_blocks, shift); sfs.f_bfree = (user32_long_t)__SHIFT_OR_CLIP(sp->f_bfree, shift); sfs.f_bavail = (user32_long_t)__SHIFT_OR_CLIP(sp->f_bavail, shift); @@ -3353,15 +3986,18 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, sfs.f_ffree = (user32_long_t)sp->f_ffree; sfs.f_fsid = sp->f_fsid; sfs.f_owner = sp->f_owner; - + +#ifdef NFSCLIENT if (mp->mnt_kern_flag & MNTK_TYPENAME_OVERRIDE) { - strlcpy(&sfs.f_fstypename[0], &mp->fstypename_override[0], MFSTYPENAMELEN); - } else { + strlcpy(&sfs.f_fstypename[0], &mp->fstypename_override[0], MFSNAMELEN); + } else +#endif + { strlcpy(sfs.f_fstypename, sp->f_fstypename, MFSNAMELEN); } strlcpy(sfs.f_mntonname, sp->f_mntonname, MNAMELEN); strlcpy(sfs.f_mntfromname, sp->f_mntfromname, MNAMELEN); - + error = SYSCTL_OUT(req, &sfs, sizeof(sfs)); } break; @@ -3370,29 +4006,40 @@ sysctl_vfs_ctlbyfsid(__unused struct sysctl_oid *oidp, void *arg1, int arg2, goto out; } out: - if(gotref != 0) + if (gotref != 0) { mount_iterdrop(mp); - return (error); + } + return error; } -static int filt_fsattach(struct knote *kn); -static void filt_fsdetach(struct knote *kn); -static int filt_fsevent(struct knote *kn, long hint); -struct filterops fs_filtops = { - .f_attach = filt_fsattach, - .f_detach = filt_fsdetach, - .f_event = filt_fsevent, +static int filt_fsattach(struct knote *kn, struct kevent_qos_s *kev); +static void filt_fsdetach(struct knote *kn); +static int filt_fsevent(struct knote *kn, long hint); +static int filt_fstouch(struct knote *kn, struct kevent_qos_s *kev); +static int filt_fsprocess(struct knote *kn, struct kevent_qos_s *kev); +SECURITY_READ_ONLY_EARLY(struct filterops) fs_filtops = { + .f_attach = filt_fsattach, + .f_detach = filt_fsdetach, + .f_event = filt_fsevent, + .f_touch = filt_fstouch, + .f_process = filt_fsprocess, }; static int -filt_fsattach(struct knote *kn) +filt_fsattach(struct knote *kn, __unused struct kevent_qos_s *kev) { + kn->kn_flags |= EV_CLEAR; /* automatic */ + kn->kn_sdata = 0; /* incoming data is ignored */ lck_mtx_lock(fs_klist_lock); - kn->kn_flags |= EV_CLEAR; KNOTE_ATTACH(&fs_klist, kn); lck_mtx_unlock(fs_klist_lock); - return (0); + + /* + * filter only sees future events, + * so it can't be fired already. + */ + return 0; } static void @@ -3415,28 +4062,71 @@ filt_fsevent(struct knote *kn, long hint) kn->kn_fflags |= hint; } - return (kn->kn_fflags != 0); + return kn->kn_fflags != 0; +} + +static int +filt_fstouch(struct knote *kn, struct kevent_qos_s *kev) +{ + int res; + + lck_mtx_lock(fs_klist_lock); + + kn->kn_sfflags = kev->fflags; + + /* + * the above filter function sets bits even if nobody is looking for them. + * Just preserve those bits even in the new mask is more selective + * than before. + * + * For compatibility with previous implementations, we leave kn_fflags + * as they were before. + */ + //if (kn->kn_sfflags) + // kn->kn_fflags &= kn->kn_sfflags; + res = (kn->kn_fflags != 0); + + lck_mtx_unlock(fs_klist_lock); + + return res; +} + +static int +filt_fsprocess(struct knote *kn, struct kevent_qos_s *kev) +{ + int res = 0; + + lck_mtx_lock(fs_klist_lock); + if (kn->kn_fflags) { + knote_fill_kevent(kn, kev, 0); + res = 1; + } + lck_mtx_unlock(fs_klist_lock); + return res; } static int sysctl_vfs_noremotehang(__unused struct sysctl_oid *oidp, - __unused void *arg1, __unused int arg2, struct sysctl_req *req) + __unused void *arg1, __unused int arg2, struct sysctl_req *req) { int out, error; pid_t pid; proc_t p; /* We need a pid. */ - if (req->newptr == USER_ADDR_NULL) - return (EINVAL); + if (req->newptr == USER_ADDR_NULL) { + return EINVAL; + } error = SYSCTL_IN(req, &pid, sizeof(pid)); - if (error) - return (error); + if (error) { + return error; + } p = proc_find(pid < 0 ? -pid : pid); - if (p == NULL) - return (ESRCH); + if (p == NULL) { + return ESRCH; + } /* * Fetching the value is ok, but we only fetch if the old @@ -3446,61 +4136,300 @@ sysctl_vfs_noremotehang(__unused struct sysctl_oid *oidp, out = !((p->p_flag & P_NOREMOTEHANG) == 0); proc_rele(p); error = SYSCTL_OUT(req, &out, sizeof(out)); - return (error); + return error; } /* cansignal offers us enough security. */ if (p != req->p && proc_suser(req->p) != 0) { proc_rele(p); - return (EPERM); + return EPERM; } - if (pid < 0) + if (pid < 0) { OSBitAndAtomic(~((uint32_t)P_NOREMOTEHANG), &p->p_flag); - else + } else { OSBitOrAtomic(P_NOREMOTEHANG, &p->p_flag); + } proc_rele(p); - return (0); + return 0; +} + +static int +sysctl_vfs_generic_conf SYSCTL_HANDLER_ARGS +{ + int *name, namelen; + struct vfstable *vfsp; + struct vfsconf vfsc = {}; + + (void)oidp; + name = arg1; + namelen = arg2; + + if (namelen < 1) { + return EISDIR; + } else if (namelen > 1) { + return ENOTDIR; + } + + mount_list_lock(); + for (vfsp = vfsconf; vfsp; vfsp = vfsp->vfc_next) { + if (vfsp->vfc_typenum == name[0]) { + break; + } + } + + if (vfsp == NULL) { + mount_list_unlock(); + return ENOTSUP; + } + + vfsc.vfc_reserved1 = 0; + bcopy(vfsp->vfc_name, vfsc.vfc_name, sizeof(vfsc.vfc_name)); + vfsc.vfc_typenum = vfsp->vfc_typenum; + vfsc.vfc_refcount = vfsp->vfc_refcount; + vfsc.vfc_flags = vfsp->vfc_flags; + vfsc.vfc_reserved2 = 0; + vfsc.vfc_reserved3 = 0; + + mount_list_unlock(); + return SYSCTL_OUT(req, &vfsc, sizeof(struct vfsconf)); } /* the vfs.generic. branch. */ SYSCTL_NODE(_vfs, VFS_GENERIC, generic, CTLFLAG_RW | CTLFLAG_LOCKED, NULL, "vfs generic hinge"); /* retreive a list of mounted filesystem fsid_t */ -SYSCTL_PROC(_vfs_generic, OID_AUTO, vfsidlist, CTLFLAG_RD | CTLFLAG_LOCKED, +SYSCTL_PROC(_vfs_generic, OID_AUTO, vfsidlist, + CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, NULL, 0, sysctl_vfs_vfslist, "S,fsid", "List of mounted filesystem ids"); /* perform operations on filesystem via fsid_t */ SYSCTL_NODE(_vfs_generic, OID_AUTO, ctlbyfsid, CTLFLAG_RW | CTLFLAG_LOCKED, sysctl_vfs_ctlbyfsid, "ctlbyfsid"); SYSCTL_PROC(_vfs_generic, OID_AUTO, noremotehang, CTLFLAG_RW | CTLFLAG_ANYBODY, NULL, 0, sysctl_vfs_noremotehang, "I", "noremotehang"); - - +SYSCTL_INT(_vfs_generic, VFS_MAXTYPENUM, maxtypenum, + CTLFLAG_RD | CTLFLAG_KERN | CTLFLAG_LOCKED, + &maxvfstypenum, 0, ""); +SYSCTL_INT(_vfs_generic, OID_AUTO, sync_timeout, CTLFLAG_RW | CTLFLAG_LOCKED, &sync_timeout_seconds, 0, ""); +SYSCTL_NODE(_vfs_generic, VFS_CONF, conf, + CTLFLAG_RD | CTLFLAG_LOCKED, + sysctl_vfs_generic_conf, ""); +#if DEVELOPMENT || DEBUG +SYSCTL_INT(_vfs_generic, OID_AUTO, print_busy_vnodes, + CTLTYPE_INT | CTLFLAG_RW, + &print_busy_vnodes, 0, + "VFS log busy vnodes blocking unmount"); +#endif + +/* Indicate that the root file system unmounted cleanly */ +static int vfs_root_unmounted_cleanly = 0; +SYSCTL_INT(_vfs_generic, OID_AUTO, root_unmounted_cleanly, CTLFLAG_RD, &vfs_root_unmounted_cleanly, 0, "Root filesystem was unmounted cleanly"); + +void +vfs_set_root_unmounted_cleanly(void) +{ + vfs_root_unmounted_cleanly = 1; +} + +/* + * Print vnode state. + */ +void +vn_print_state(struct vnode *vp, const char *fmt, ...) +{ + va_list ap; + char perm_str[] = "(VM_KERNEL_ADDRPERM pointer)"; + char fs_name[MFSNAMELEN]; + + va_start(ap, fmt); + vprintf(fmt, ap); + va_end(ap); + printf("vp 0x%0llx %s: ", (uint64_t)VM_KERNEL_ADDRPERM(vp), perm_str); + printf("tag %d, type %d\n", vp->v_tag, vp->v_type); + /* Counts .. */ + printf(" iocount %d, usecount %d, kusecount %d references %d\n", + vp->v_iocount, vp->v_usecount, vp->v_kusecount, vp->v_references); + printf(" writecount %d, numoutput %d\n", vp->v_writecount, + vp->v_numoutput); + /* Flags */ + printf(" flag 0x%x, lflag 0x%x, listflag 0x%x\n", vp->v_flag, + vp->v_lflag, vp->v_listflag); + + if (vp->v_mount == NULL || vp->v_mount == dead_mountp) { + strlcpy(fs_name, "deadfs", MFSNAMELEN); + } else { + vfs_name(vp->v_mount, fs_name); + } + + printf(" v_data 0x%0llx %s\n", + (vp->v_data ? (uint64_t)VM_KERNEL_ADDRPERM(vp->v_data) : 0), + perm_str); + printf(" v_mount 0x%0llx %s vfs_name %s\n", + (vp->v_mount ? (uint64_t)VM_KERNEL_ADDRPERM(vp->v_mount) : 0), + perm_str, fs_name); +} + long num_reusedvnodes = 0; + +static vnode_t +process_vp(vnode_t vp, int want_vp, int *deferred) +{ + unsigned int vpid; + + *deferred = 0; + + vpid = vp->v_id; + + vnode_list_remove_locked(vp); + + vnode_list_unlock(); + + vnode_lock_spin(vp); + + /* + * We could wait for the vnode_lock after removing the vp from the freelist + * and the vid is bumped only at the very end of reclaim. So it is possible + * that we are looking at a vnode that is being terminated. If so skip it. + */ + if ((vpid != vp->v_id) || (vp->v_usecount != 0) || (vp->v_iocount != 0) || + VONLIST(vp) || (vp->v_lflag & VL_TERMINATE)) { + /* + * we lost the race between dropping the list lock + * and picking up the vnode_lock... someone else + * used this vnode and it is now in a new state + */ + vnode_unlock(vp); + + return NULLVP; + } + if ((vp->v_lflag & (VL_NEEDINACTIVE | VL_MARKTERM)) == VL_NEEDINACTIVE) { + /* + * we did a vnode_rele_ext that asked for + * us not to reenter the filesystem during + * the release even though VL_NEEDINACTIVE was + * set... we'll do it here by doing a + * vnode_get/vnode_put + * + * pick up an iocount so that we can call + * vnode_put and drive the VNOP_INACTIVE... + * vnode_put will either leave us off + * the freelist if a new ref comes in, + * or put us back on the end of the freelist + * or recycle us if we were marked for termination... + * so we'll just go grab a new candidate + */ + vp->v_iocount++; +#ifdef JOE_DEBUG + record_vp(vp, 1); +#endif + vnode_put_locked(vp); + vnode_unlock(vp); + + return NULLVP; + } + /* + * Checks for anyone racing us for recycle + */ + if (vp->v_type != VBAD) { + if (want_vp && (vnode_on_reliable_media(vp) == FALSE || (vp->v_flag & VISDIRTY))) { + vnode_async_list_add(vp); + vnode_unlock(vp); + + *deferred = 1; + + return NULLVP; + } + if (vp->v_lflag & VL_DEAD) { + panic("new_vnode(%p): the vnode is VL_DEAD but not VBAD", vp); + } + + vnode_lock_convert(vp); + (void)vnode_reclaim_internal(vp, 1, want_vp, 0); + + if (want_vp) { + if ((VONLIST(vp))) { + panic("new_vnode(%p): vp on list", vp); + } + if (vp->v_usecount || vp->v_iocount || vp->v_kusecount || + (vp->v_lflag & (VNAMED_UBC | VNAMED_MOUNT | VNAMED_FSHASH))) { + panic("new_vnode(%p): free vnode still referenced", vp); + } + if ((vp->v_mntvnodes.tqe_prev != 0) && (vp->v_mntvnodes.tqe_next != 0)) { + panic("new_vnode(%p): vnode seems to be on mount list", vp); + } + if (!LIST_EMPTY(&vp->v_nclinks) || !TAILQ_EMPTY(&vp->v_ncchildren)) { + panic("new_vnode(%p): vnode still hooked into the name cache", vp); + } + } else { + vnode_unlock(vp); + vp = NULLVP; + } + } + return vp; +} + +__attribute__((noreturn)) +static void +async_work_continue(void) +{ + struct async_work_lst *q; + int deferred; + vnode_t vp; + + q = &vnode_async_work_list; + + for (;;) { + vnode_list_lock(); + + if (TAILQ_EMPTY(q)) { + assert_wait(q, (THREAD_UNINT)); + + vnode_list_unlock(); + + thread_block((thread_continue_t)async_work_continue); + + continue; + } + async_work_handled++; + + vp = TAILQ_FIRST(q); + + vp = process_vp(vp, 0, &deferred); + + if (vp != NULLVP) { + panic("found VBAD vp (%p) on async queue", vp); + } + } +} + + static int new_vnode(vnode_t *vpp) { - vnode_t vp; - int retries = 0; /* retry incase of tablefull */ + vnode_t vp; + uint32_t retries = 0, max_retries = 100; /* retry incase of tablefull */ int force_alloc = 0, walk_count = 0; - unsigned int vpid; - struct timespec ts; - struct timeval current_tv; -#ifndef __LP64__ - struct unsafe_fsnode *l_unsafefs = 0; -#endif /* __LP64__ */ + boolean_t need_reliable_vp = FALSE; + int deferred; + struct timeval initial_tv; + struct timeval current_tv; proc_t curproc = current_proc(); + initial_tv.tv_sec = 0; retry: - microuptime(¤t_tv); - vp = NULLVP; vnode_list_lock(); + if (need_reliable_vp == TRUE) { + async_work_timed_out++; + } + if ((numvnodes - deadvnodes) < desiredvnodes || force_alloc) { - if ( !TAILQ_EMPTY(&vnode_dead_list)) { + struct timespec ts; + + if (!TAILQ_EMPTY(&vnode_dead_list)) { /* * Can always reuse a dead one */ @@ -3516,84 +4445,105 @@ retry: MALLOC_ZONE(vp, struct vnode *, sizeof(*vp), M_VNODE, M_WAITOK); bzero((char *)vp, sizeof(*vp)); - VLISTNONE(vp); /* avoid double queue removal */ + VLISTNONE(vp); /* avoid double queue removal */ lck_mtx_init(&vp->v_lock, vnode_lck_grp, vnode_lck_attr); + TAILQ_INIT(&vp->v_ncchildren); + klist_init(&vp->v_knotes); nanouptime(&ts); vp->v_id = ts.tv_nsec; vp->v_flag = VSTANDARD; #if CONFIG_MACF - if (mac_vnode_label_init_needed(vp)) + if (mac_vnode_label_init_needed(vp)) { mac_vnode_label_init(vp); + } #endif /* MAC */ vp->v_iocount = 1; goto done; } + microuptime(¤t_tv); #define MAX_WALK_COUNT 1000 - if ( !TAILQ_EMPTY(&vnode_rage_list) && - (ragevnodes >= rage_limit || - (current_tv.tv_sec - rage_tv.tv_sec) >= RAGE_TIME_LIMIT)) { - + if (!TAILQ_EMPTY(&vnode_rage_list) && + (ragevnodes >= rage_limit || + (current_tv.tv_sec - rage_tv.tv_sec) >= RAGE_TIME_LIMIT)) { TAILQ_FOREACH(vp, &vnode_rage_list, v_freelist) { - if ( !(vp->v_listflag & VLIST_RAGE)) - panic("new_vnode: vp (%p) on RAGE list not marked VLIST_RAGE", vp); + if (!(vp->v_listflag & VLIST_RAGE)) { + panic("new_vnode: vp (%p) on RAGE list not marked VLIST_RAGE", vp); + } - // if we're a dependency-capable process, skip vnodes that can + // if we're a dependency-capable process, skip vnodes that can // cause recycling deadlocks. (i.e. this process is diskimages // helper and the vnode is in a disk image). Querying the // mnt_kern_flag for the mount's virtual device status // is safer than checking the mnt_dependent_process, which - // may not be updated if there are multiple devnode layers + // may not be updated if there are multiple devnode layers // in between the disk image and the final consumer. - if ((curproc->p_flag & P_DEPENDENCY_CAPABLE) == 0 || vp->v_mount == NULL || - (vp->v_mount->mnt_kern_flag & MNTK_VIRTUALDEV) == 0) { - break; - } + if ((curproc->p_flag & P_DEPENDENCY_CAPABLE) == 0 || vp->v_mount == NULL || + (vp->v_mount->mnt_kern_flag & MNTK_VIRTUALDEV) == 0) { + /* + * if need_reliable_vp == TRUE, then we've already sent one or more + * non-reliable vnodes to the async thread for processing and timed + * out waiting for a dead vnode to show up. Use the MAX_WALK_COUNT + * mechanism to first scan for a reliable vnode before forcing + * a new vnode to be created + */ + if (need_reliable_vp == FALSE || vnode_on_reliable_media(vp) == TRUE) { + break; + } + } - // don't iterate more than MAX_WALK_COUNT vnodes to - // avoid keeping the vnode list lock held for too long. - if (walk_count++ > MAX_WALK_COUNT) { + // don't iterate more than MAX_WALK_COUNT vnodes to + // avoid keeping the vnode list lock held for too long. + + if (walk_count++ > MAX_WALK_COUNT) { vp = NULL; - break; - } + break; + } } - } if (vp == NULL && !TAILQ_EMPTY(&vnode_free_list)) { - /* + /* * Pick the first vp for possible reuse */ walk_count = 0; TAILQ_FOREACH(vp, &vnode_free_list, v_freelist) { - // if we're a dependency-capable process, skip vnodes that can // cause recycling deadlocks. (i.e. this process is diskimages // helper and the vnode is in a disk image). Querying the // mnt_kern_flag for the mount's virtual device status // is safer than checking the mnt_dependent_process, which - // may not be updated if there are multiple devnode layers + // may not be updated if there are multiple devnode layers // in between the disk image and the final consumer. - if ((curproc->p_flag & P_DEPENDENCY_CAPABLE) == 0 || vp->v_mount == NULL || - (vp->v_mount->mnt_kern_flag & MNTK_VIRTUALDEV) == 0) { - break; - } + if ((curproc->p_flag & P_DEPENDENCY_CAPABLE) == 0 || vp->v_mount == NULL || + (vp->v_mount->mnt_kern_flag & MNTK_VIRTUALDEV) == 0) { + /* + * if need_reliable_vp == TRUE, then we've already sent one or more + * non-reliable vnodes to the async thread for processing and timed + * out waiting for a dead vnode to show up. Use the MAX_WALK_COUNT + * mechanism to first scan for a reliable vnode before forcing + * a new vnode to be created + */ + if (need_reliable_vp == FALSE || vnode_on_reliable_media(vp) == TRUE) { + break; + } + } + + // don't iterate more than MAX_WALK_COUNT vnodes to + // avoid keeping the vnode list lock held for too long. - // don't iterate more than MAX_WALK_COUNT vnodes to - // avoid keeping the vnode list lock held for too long. - if (walk_count++ > MAX_WALK_COUNT) { - vp = NULL; - break; - } + if (walk_count++ > MAX_WALK_COUNT) { + vp = NULL; + break; + } } - } // @@ -3606,9 +4556,9 @@ retry: // the allocation. // if (vp == NULL && walk_count >= MAX_WALK_COUNT) { - force_alloc = 1; - vnode_list_unlock(); - goto retry; + force_alloc = 1; + vnode_list_unlock(); + goto retry; } if (vp == NULL) { @@ -3616,25 +4566,32 @@ retry: * we've reached the system imposed maximum number of vnodes * but there isn't a single one available * wait a bit and then retry... if we can't get a vnode - * after 100 retries, than log a complaint + * after our target number of retries, than log a complaint */ - if (++retries <= 100) { + if (++retries <= max_retries) { vnode_list_unlock(); delay_for_interval(1, 1000 * 1000); goto retry; } - + vnode_list_unlock(); tablefull("vnode"); log(LOG_EMERG, "%d desired, %d numvnodes, " - "%d free, %d dead, %d rage\n", - desiredvnodes, numvnodes, freevnodes, deadvnodes, ragevnodes); -#if CONFIG_EMBEDDED + "%d free, %d dead, %d async, %d rage\n", + desiredvnodes, numvnodes, freevnodes, deadvnodes, async_work_vnodes, ragevnodes); +#if CONFIG_JETSAM + +#if DEVELOPMENT || DEBUG + if (bootarg_no_vnode_jetsam) { + panic("vnode table is full\n"); + } +#endif /* DEVELOPMENT || DEBUG */ + /* * Running out of vnodes tends to make a system unusable. Start killing * processes that jetsam knows are killable. */ - if (jetsam_kill_top_proc(TRUE, kJetsamFlagsKilledVnodes) < 0) { + if (memorystatus_kill_on_vnode_limit() == FALSE) { /* * If jetsam can't find any more processes to kill and there * still aren't any free vnodes, panic. Hopefully we'll get a @@ -3643,101 +4600,87 @@ retry: panic("vnode table is full\n"); } - delay_for_interval(1, 1000 * 1000); + /* + * Now that we've killed someone, wait a bit and continue looking + * (with fewer retries before trying another kill). + */ + delay_for_interval(3, 1000 * 1000); + retries = 0; + max_retries = 10; goto retry; #endif *vpp = NULL; - return (ENFILE); + return ENFILE; } steal_this_vp: - vpid = vp->v_id; + if ((vp = process_vp(vp, 1, &deferred)) == NULLVP) { + if (deferred) { + int elapsed_msecs; + struct timeval elapsed_tv; - vnode_list_remove_locked(vp); + if (initial_tv.tv_sec == 0) { + microuptime(&initial_tv); + } - vnode_list_unlock(); + vnode_list_lock(); - vnode_lock_spin(vp); + dead_vnode_waited++; + dead_vnode_wanted++; - /* - * We could wait for the vnode_lock after removing the vp from the freelist - * and the vid is bumped only at the very end of reclaim. So it is possible - * that we are looking at a vnode that is being terminated. If so skip it. - */ - if ((vpid != vp->v_id) || (vp->v_usecount != 0) || (vp->v_iocount != 0) || - VONLIST(vp) || (vp->v_lflag & VL_TERMINATE)) { - /* - * we lost the race between dropping the list lock - * and picking up the vnode_lock... someone else - * used this vnode and it is now in a new state - * so we need to go back and try again - */ - vnode_unlock(vp); - goto retry; - } - if ( (vp->v_lflag & (VL_NEEDINACTIVE | VL_MARKTERM)) == VL_NEEDINACTIVE ) { - /* - * we did a vnode_rele_ext that asked for - * us not to reenter the filesystem during - * the release even though VL_NEEDINACTIVE was - * set... we'll do it here by doing a - * vnode_get/vnode_put - * - * pick up an iocount so that we can call - * vnode_put and drive the VNOP_INACTIVE... - * vnode_put will either leave us off - * the freelist if a new ref comes in, - * or put us back on the end of the freelist - * or recycle us if we were marked for termination... - * so we'll just go grab a new candidate - */ - vp->v_iocount++; -#ifdef JOE_DEBUG - record_vp(vp, 1); -#endif - vnode_put_locked(vp); - vnode_unlock(vp); - goto retry; - } - OSAddAtomicLong(1, &num_reusedvnodes); + /* + * note that we're only going to explicitly wait 10ms + * for a dead vnode to become available, since even if one + * isn't available, a reliable vnode might now be available + * at the head of the VRAGE or free lists... if so, we + * can satisfy the new_vnode request with less latency then waiting + * for the full 100ms duration we're ultimately willing to tolerate + */ + assert_wait_timeout((caddr_t)&dead_vnode_wanted, (THREAD_INTERRUPTIBLE), 10000, NSEC_PER_USEC); - /* Checks for anyone racing us for recycle */ - if (vp->v_type != VBAD) { - if (vp->v_lflag & VL_DEAD) - panic("new_vnode(%p): the vnode is VL_DEAD but not VBAD", vp); - vnode_lock_convert(vp); - (void)vnode_reclaim_internal(vp, 1, 1, 0); + vnode_list_unlock(); - if ((VONLIST(vp))) - panic("new_vnode(%p): vp on list", vp); - if (vp->v_usecount || vp->v_iocount || vp->v_kusecount || - (vp->v_lflag & (VNAMED_UBC | VNAMED_MOUNT | VNAMED_FSHASH))) - panic("new_vnode(%p): free vnode still referenced", vp); - if ((vp->v_mntvnodes.tqe_prev != 0) && (vp->v_mntvnodes.tqe_next != 0)) - panic("new_vnode(%p): vnode seems to be on mount list", vp); - if ( !LIST_EMPTY(&vp->v_nclinks) || !LIST_EMPTY(&vp->v_ncchildren)) - panic("new_vnode(%p): vnode still hooked into the name cache", vp); - } + thread_block(THREAD_CONTINUE_NULL); -#ifndef __LP64__ - if (vp->v_unsafefs) { - l_unsafefs = vp->v_unsafefs; - vp->v_unsafefs = (struct unsafe_fsnode *)NULL; + microuptime(&elapsed_tv); + + timevalsub(&elapsed_tv, &initial_tv); + elapsed_msecs = elapsed_tv.tv_sec * 1000 + elapsed_tv.tv_usec / 1000; + + if (elapsed_msecs >= 100) { + /* + * we've waited long enough... 100ms is + * somewhat arbitrary for this case, but the + * normal worst case latency used for UI + * interaction is 100ms, so I've chosen to + * go with that. + * + * setting need_reliable_vp to TRUE + * forces us to find a reliable vnode + * that we can process synchronously, or + * to create a new one if the scan for + * a reliable one hits the scan limit + */ + need_reliable_vp = TRUE; + } + } + goto retry; } -#endif /* __LP64__ */ + OSAddAtomicLong(1, &num_reusedvnodes); + #if CONFIG_MACF /* * We should never see VL_LABELWAIT or VL_LABEL here. * as those operations hold a reference. */ - assert ((vp->v_lflag & VL_LABELWAIT) != VL_LABELWAIT); - assert ((vp->v_lflag & VL_LABEL) != VL_LABEL); - if (vp->v_lflag & VL_LABELED) { - vnode_lock_convert(vp); + assert((vp->v_lflag & VL_LABELWAIT) != VL_LABELWAIT); + assert((vp->v_lflag & VL_LABEL) != VL_LABEL); + if (vp->v_lflag & VL_LABELED || vp->v_label != NULL) { + vnode_lock_convert(vp); mac_vnode_label_recycle(vp); } else if (mac_vnode_label_init_needed(vp)) { - vnode_lock_convert(vp); + vnode_lock_convert(vp); mac_vnode_label_init(vp); } @@ -3746,7 +4689,7 @@ steal_this_vp: vp->v_iocount = 1; vp->v_lflag = 0; vp->v_writecount = 0; - vp->v_references = 0; + vp->v_references = 0; vp->v_iterblkflags = 0; vp->v_flag = VSTANDARD; /* vbad vnodes can point to dead_mountp */ @@ -3755,17 +4698,10 @@ steal_this_vp: vnode_unlock(vp); -#ifndef __LP64__ - if (l_unsafefs) { - lck_mtx_destroy(&l_unsafefs->fsnodelock, vnode_lck_grp); - FREE_ZONE((void *)l_unsafefs, sizeof(struct unsafe_fsnode), M_UNSAFEFS); - } -#endif /* __LP64__ */ - done: *vpp = vp; - return (0); + return 0; } void @@ -3791,13 +4727,13 @@ vnode_unlock(vnode_t vp) int vnode_get(struct vnode *vp) { - int retval; + int retval; - vnode_lock_spin(vp); + vnode_lock_spin(vp); retval = vnode_get_locked(vp); vnode_unlock(vp); - return(retval); + return retval; } int @@ -3807,13 +4743,17 @@ vnode_get_locked(struct vnode *vp) lck_mtx_assert(&vp->v_lock, LCK_MTX_ASSERT_OWNED); #endif if ((vp->v_iocount == 0) && (vp->v_lflag & (VL_TERMINATE | VL_DEAD))) { - return(ENOENT); + return ENOENT; } - vp->v_iocount++; + + if (os_add_overflow(vp->v_iocount, 1, &vp->v_iocount)) { + panic("v_iocount overflow"); + } + #ifdef JOE_DEBUG record_vp(vp, 1); #endif - return (0); + return 0; } /* @@ -3825,7 +4765,7 @@ vnode_get_locked(struct vnode *vp) int vnode_getwithvid(vnode_t vp, uint32_t vid) { - return(vget_internal(vp, vid, ( VNODE_NODEAD | VNODE_WITHID | VNODE_DRAINO ))); + return vget_internal(vp, vid, (VNODE_NODEAD | VNODE_WITHID | VNODE_DRAINO)); } /* @@ -3836,54 +4776,65 @@ vnode_getwithvid(vnode_t vp, uint32_t vid) int vnode_getwithvid_drainok(vnode_t vp, uint32_t vid) { - return(vget_internal(vp, vid, ( VNODE_NODEAD | VNODE_WITHID ))); + return vget_internal(vp, vid, (VNODE_NODEAD | VNODE_WITHID)); } int vnode_getwithref(vnode_t vp) { - return(vget_internal(vp, 0, 0)); + return vget_internal(vp, 0, 0); } __private_extern__ int vnode_getalways(vnode_t vp) { - return(vget_internal(vp, 0, VNODE_ALWAYS)); + return vget_internal(vp, 0, VNODE_ALWAYS); } int vnode_put(vnode_t vp) { - int retval; + int retval; vnode_lock_spin(vp); retval = vnode_put_locked(vp); vnode_unlock(vp); - return(retval); + return retval; +} + +static inline void +vn_set_dead(vnode_t vp) +{ + vp->v_mount = NULL; + vp->v_op = dead_vnodeop_p; + vp->v_tag = VT_NON; + vp->v_data = NULL; + vp->v_type = VBAD; + vp->v_lflag |= VL_DEAD; } int vnode_put_locked(vnode_t vp) { - vfs_context_t ctx = vfs_context_current(); /* hoist outside loop */ + vfs_context_t ctx = vfs_context_current(); /* hoist outside loop */ #if DIAGNOSTIC lck_mtx_assert(&vp->v_lock, LCK_MTX_ASSERT_OWNED); #endif retry: - if (vp->v_iocount < 1) + if (vp->v_iocount < 1) { panic("vnode_put(%p): iocount < 1", vp); + } - if ((vp->v_usecount > 0) || (vp->v_iocount > 1)) { + if ((vp->v_usecount > 0) || (vp->v_iocount > 1)) { vnode_dropiocount(vp); - return(0); + return 0; } if ((vp->v_lflag & (VL_DEAD | VL_NEEDINACTIVE)) == VL_NEEDINACTIVE) { - - vp->v_lflag &= ~VL_NEEDINACTIVE; - vnode_unlock(vp); + vp->v_lflag &= ~VL_NEEDINACTIVE; + vnode_unlock(vp); VNOP_INACTIVE(vp, ctx); @@ -3899,62 +4850,74 @@ retry: */ goto retry; } - vp->v_lflag &= ~VL_NEEDINACTIVE; + vp->v_lflag &= ~VL_NEEDINACTIVE; if ((vp->v_lflag & (VL_MARKTERM | VL_TERMINATE | VL_DEAD)) == VL_MARKTERM) { - vnode_lock_convert(vp); - vnode_reclaim_internal(vp, 1, 1, 0); + vnode_lock_convert(vp); + vnode_reclaim_internal(vp, 1, 1, 0); } vnode_dropiocount(vp); vnode_list_add(vp); - return(0); + return 0; } /* is vnode_t in use by others? */ -int +int vnode_isinuse(vnode_t vp, int refcnt) { - return(vnode_isinuse_locked(vp, refcnt, 0)); + return vnode_isinuse_locked(vp, refcnt, 0); +} + +int +vnode_usecount(vnode_t vp) +{ + return vp->v_usecount; } +int +vnode_iocount(vnode_t vp) +{ + return vp->v_iocount; +} -static int +static int vnode_isinuse_locked(vnode_t vp, int refcnt, int locked) { int retval = 0; - if (!locked) + if (!locked) { vnode_lock_spin(vp); - if ((vp->v_type != VREG) && ((vp->v_usecount - vp->v_kusecount) > refcnt)) { + } + if ((vp->v_type != VREG) && ((vp->v_usecount - vp->v_kusecount) > refcnt)) { retval = 1; goto out; } - if (vp->v_type == VREG) { + if (vp->v_type == VREG) { retval = ubc_isinuse_locked(vp, refcnt, 1); } - + out: - if (!locked) + if (!locked) { vnode_unlock(vp); - return(retval); + } + return retval; } /* resume vnode_t */ -errno_t +errno_t vnode_resume(vnode_t vp) { if ((vp->v_lflag & VL_SUSPENDED) && vp->v_owner == current_thread()) { - vnode_lock_spin(vp); - vp->v_lflag &= ~VL_SUSPENDED; + vp->v_lflag &= ~VL_SUSPENDED; vp->v_owner = NULL; vnode_unlock(vp); wakeup(&vp->v_iocount); } - return(0); + return 0; } /* suspend vnode_t @@ -3967,13 +4930,13 @@ errno_t vnode_suspend(vnode_t vp) { if (vp->v_lflag & VL_SUSPENDED) { - return(EBUSY); + return EBUSY; } vnode_lock_spin(vp); - /* - * xxx is this sufficient to check if a vnode_drain is + /* + * xxx is this sufficient to check if a vnode_drain is * progress? */ @@ -3983,28 +4946,59 @@ vnode_suspend(vnode_t vp) } vnode_unlock(vp); - return(0); + return 0; +} + +/* + * Release any blocked locking requests on the vnode. + * Used for forced-unmounts. + * + * XXX What about network filesystems? + */ +static void +vnode_abort_advlocks(vnode_t vp) +{ + if (vp->v_flag & VLOCKLOCAL) { + lf_abort_advlocks(vp); + } } - - -static errno_t + +static errno_t vnode_drain(vnode_t vp) { - if (vp->v_lflag & VL_DRAIN) { panic("vnode_drain: recursive drain"); - return(ENOENT); + return ENOENT; } vp->v_lflag |= VL_DRAIN; vp->v_owner = current_thread(); - while (vp->v_iocount > 1) - msleep(&vp->v_iocount, &vp->v_lock, PVFS, "vnode_drain", NULL); + while (vp->v_iocount > 1) { + if (bootarg_no_vnode_drain) { + struct timespec ts = {.tv_sec = 10, .tv_nsec = 0}; + int error; + + if (vfs_unmountall_started) { + ts.tv_sec = 1; + } + + error = msleep(&vp->v_iocount, &vp->v_lock, PVFS, "vnode_drain_with_timeout", &ts); + + /* Try to deal with leaked iocounts under bootarg and shutting down */ + if (vp->v_iocount > 1 && error == EWOULDBLOCK && + ts.tv_sec == 1 && vp->v_numoutput == 0) { + vp->v_iocount = 1; + break; + } + } else { + msleep(&vp->v_iocount, &vp->v_lock, PVFS, "vnode_drain", NULL); + } + } vp->v_lflag &= ~VL_DRAIN; - return(0); + return 0; } @@ -4016,8 +5010,10 @@ vnode_drain(vnode_t vp) * this allows us to keep actively referenced vnodes in the list without having * to constantly remove and add to the list each time a vnode w/o a usecount is * referenced which costs us taking and dropping a global lock twice. + * However, if the vnode is marked DIRTY, we want to pull it out much earlier */ -#define UNAGE_THRESHHOLD 25 +#define UNAGE_THRESHHOLD 25 +#define UNAGE_DIRTYTHRESHHOLD 6 errno_t vnode_getiocount(vnode_t vp, unsigned int vid, int vflags) @@ -4026,25 +5022,28 @@ vnode_getiocount(vnode_t vp, unsigned int vid, int vflags) int nosusp = vflags & VNODE_NOSUSPEND; int always = vflags & VNODE_ALWAYS; int beatdrain = vflags & VNODE_DRAINO; + int withvid = vflags & VNODE_WITHID; for (;;) { + int sleepflg = 0; + /* * if it is a dead vnode with deadfs */ - if (nodead && (vp->v_lflag & VL_DEAD) && ((vp->v_type == VBAD) || (vp->v_data == 0))) { - return(ENOENT); + if (nodead && (vp->v_lflag & VL_DEAD) && ((vp->v_type == VBAD) || (vp->v_data == 0))) { + return ENOENT; } /* * will return VL_DEAD ones */ - if ((vp->v_lflag & (VL_SUSPENDED | VL_DRAIN | VL_TERMINATE)) == 0 ) { + if ((vp->v_lflag & (VL_SUSPENDED | VL_DRAIN | VL_TERMINATE)) == 0) { break; } /* * if suspended vnodes are to be failed */ if (nosusp && (vp->v_lflag & VL_SUSPENDED)) { - return(ENOENT); + return ENOENT; } /* * if you are the owner of drain/suspend/termination , can acquire iocount @@ -4052,58 +5051,92 @@ vnode_getiocount(vnode_t vp, unsigned int vid, int vflags) */ if ((vp->v_lflag & (VL_DRAIN | VL_SUSPENDED | VL_TERMINATE)) && (vp->v_owner == current_thread())) { - break; + break; } - - if (always != 0) + + if (always != 0) { break; + } /* - * In some situations, we want to get an iocount - * even if the vnode is draining to prevent deadlock, - * e.g. if we're in the filesystem, potentially holding - * resources that could prevent other iocounts from - * being released. + * If this vnode is getting drained, there are some cases where + * we can't block or, in case of tty vnodes, want to be + * interruptible. */ - if (beatdrain && (vp->v_lflag & VL_DRAIN)) { - break; + if (vp->v_lflag & VL_DRAIN) { + /* + * In some situations, we want to get an iocount + * even if the vnode is draining to prevent deadlock, + * e.g. if we're in the filesystem, potentially holding + * resources that could prevent other iocounts from + * being released. + */ + if (beatdrain) { + break; + } + /* + * Don't block if the vnode's mount point is unmounting as + * we may be the thread the unmount is itself waiting on + * Only callers who pass in vids (at this point, we've already + * handled nosusp and nodead) are expecting error returns + * from this function, so only we can only return errors for + * those. ENODEV is intended to inform callers that the call + * failed because an unmount is in progress. + */ + if (withvid && (vp->v_mount) && vfs_isunmount(vp->v_mount)) { + return ENODEV; + } + + if (vnode_istty(vp)) { + sleepflg = PCATCH; + } } vnode_lock_convert(vp); if (vp->v_lflag & VL_TERMINATE) { + int error; + vp->v_lflag |= VL_TERMWANT; - msleep(&vp->v_lflag, &vp->v_lock, PVFS, "vnode getiocount", NULL); - } else + error = msleep(&vp->v_lflag, &vp->v_lock, + (PVFS | sleepflg), "vnode getiocount", NULL); + if (error) { + return error; + } + } else { msleep(&vp->v_iocount, &vp->v_lock, PVFS, "vnode_getiocount", NULL); + } } - if (((vflags & VNODE_WITHID) != 0) && vid != vp->v_id) { - return(ENOENT); + if (withvid && vid != vp->v_id) { + return ENOENT; } - if (++vp->v_references >= UNAGE_THRESHHOLD) { - vp->v_references = 0; + if (++vp->v_references >= UNAGE_THRESHHOLD || + (vp->v_flag & VISDIRTY && vp->v_references >= UNAGE_DIRTYTHRESHHOLD)) { + vp->v_references = 0; vnode_list_remove(vp); } vp->v_iocount++; #ifdef JOE_DEBUG record_vp(vp, 1); #endif - return(0); + return 0; } static void -vnode_dropiocount (vnode_t vp) +vnode_dropiocount(vnode_t vp) { - if (vp->v_iocount < 1) + if (vp->v_iocount < 1) { panic("vnode_dropiocount(%p): v_iocount < 1", vp); + } vp->v_iocount--; #ifdef JOE_DEBUG record_vp(vp, -1); #endif - if ((vp->v_lflag & (VL_DRAIN | VL_SUSPENDED)) && (vp->v_iocount <= 1)) + if ((vp->v_lflag & (VL_DRAIN | VL_SUSPENDED)) && (vp->v_iocount <= 1)) { wakeup(&vp->v_iocount); + } } @@ -4119,8 +5152,9 @@ vnode_reclaim_internal(struct vnode * vp, int locked, int reuse, int flags) { int isfifo = 0; - if (!locked) + if (!locked) { vnode_lock(vp); + } if (vp->v_lflag & VL_TERMINATE) { panic("vnode reclaim in progress"); @@ -4129,13 +5163,20 @@ vnode_reclaim_internal(struct vnode * vp, int locked, int reuse, int flags) vn_clearunionwait(vp, 1); + if (vnode_istty(vp) && (flags & REVOKEALL) && vp->v_usecount && + (vp->v_iocount > 1)) { + vnode_unlock(vp); + VNOP_IOCTL(vp, TIOCREVOKE, (caddr_t)NULL, 0, vfs_context_kernel()); + vnode_lock(vp); + } + vnode_drain(vp); isfifo = (vp->v_type == VFIFO); - if (vp->v_type != VBAD) - vgone(vp, flags); /* clean and reclaim the vnode */ - + if (vp->v_type != VBAD) { + vgone(vp, flags); /* clean and reclaim the vnode */ + } /* * give the vnode a new identity so that vnode_getwithvid will fail * on any stale cache accesses... @@ -4168,16 +5209,21 @@ vnode_reclaim_internal(struct vnode * vp, int locked, int reuse, int flags) } vp->v_type = VBAD; - if (vp->v_data) + if (vp->v_data) { panic("vnode_reclaim_internal: cleaned vnode isn't"); - if (vp->v_numoutput) + } + if (vp->v_numoutput) { panic("vnode_reclaim_internal: clean vnode has pending I/O's"); - if (UBCINFOEXISTS(vp)) + } + if (UBCINFOEXISTS(vp)) { panic("vnode_reclaim_internal: ubcinfo not cleaned"); - if (vp->v_parent) - panic("vnode_reclaim_internal: vparent not removed"); - if (vp->v_name) - panic("vnode_reclaim_internal: vname not removed"); + } + if (vp->v_parent) { + panic("vnode_reclaim_internal: vparent not removed"); + } + if (vp->v_name) { + panic("vnode_reclaim_internal: vname not removed"); + } vp->v_socket = NULL; @@ -4194,58 +5240,95 @@ vnode_reclaim_internal(struct vnode * vp, int locked, int reuse, int flags) wakeup(&vp->v_lflag); } if (!reuse) { - /* + /* * make sure we get on the * dead list if appropriate */ - vnode_list_add(vp); + vnode_list_add(vp); + } + if (!locked) { + vnode_unlock(vp); } - if (!locked) - vnode_unlock(vp); } -/* USAGE: - * The following api creates a vnode and associates all the parameter specified in vnode_fsparam - * structure and returns a vnode handle with a reference. device aliasing is handled here so checkalias - * is obsoleted by this. - */ -int -vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) +static int +vnode_create_internal(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp, + int init_vnode) { int error; int insert = 1; + int existing_vnode; vnode_t vp; vnode_t nvp; vnode_t dvp; - struct uthread *ut; + struct uthread *ut; struct componentname *cnp; struct vnode_fsparam *param = (struct vnode_fsparam *)data; #if CONFIG_TRIGGERS struct vnode_trigger_param *tinfo = NULL; #endif - if (param == NULL) - return (EINVAL); + if (*vpp) { + vp = *vpp; + *vpp = NULLVP; + existing_vnode = 1; + } else { + existing_vnode = 0; + } -#if CONFIG_TRIGGERS - if ((flavor == VNCREATE_TRIGGER) && (size == VNCREATE_TRIGGER_SIZE)) { - tinfo = (struct vnode_trigger_param *)data; + if (init_vnode) { + /* Do quick sanity check on the parameters. */ + if ((param == NULL) || (param->vnfs_vtype == VBAD)) { + error = EINVAL; + goto error_out; + } - /* Validate trigger vnode input */ - if ((param->vnfs_vtype != VDIR) || - (tinfo->vnt_resolve_func == NULL) || - (tinfo->vnt_flags & ~VNT_VALID_MASK)) { - return (EINVAL); +#if CONFIG_TRIGGERS + if ((flavor == VNCREATE_TRIGGER) && (size == VNCREATE_TRIGGER_SIZE)) { + tinfo = (struct vnode_trigger_param *)data; + + /* Validate trigger vnode input */ + if ((param->vnfs_vtype != VDIR) || + (tinfo->vnt_resolve_func == NULL) || + (tinfo->vnt_flags & ~VNT_VALID_MASK)) { + error = EINVAL; + goto error_out; + } + /* Fall through a normal create (params will be the same) */ + flavor = VNCREATE_FLAVOR; + size = VCREATESIZE; } - /* Fall through a normal create (params will be the same) */ - flavor = VNCREATE_FLAVOR; - size = VCREATESIZE; - } #endif - if ((flavor != VNCREATE_FLAVOR) || (size != VCREATESIZE)) - return (EINVAL); + if ((flavor != VNCREATE_FLAVOR) || (size != VCREATESIZE)) { + error = EINVAL; + goto error_out; + } + } - if ( (error = new_vnode(&vp)) ) - return(error); + if (!existing_vnode) { + if ((error = new_vnode(&vp))) { + return error; + } + if (!init_vnode) { + /* Make it so that it can be released by a vnode_put) */ + vn_set_dead(vp); + *vpp = vp; + return 0; + } + } else { + /* + * A vnode obtained by vnode_create_empty has been passed to + * vnode_initialize - Unset VL_DEAD set by vn_set_dead. After + * this point, it is set back on any error. + * + * N.B. vnode locking - We make the same assumptions as the + * "unsplit" vnode_create did - i.e. it is safe to update the + * vnode's fields without the vnode lock. This vnode has been + * out and about with the filesystem and hopefully nothing + * was done to the vnode between the vnode_create_empty and + * now when it has come in through vnode_initialize. + */ + vp->v_lflag &= ~VL_DEAD; + } dvp = param->vnfs_dvp; cnp = param->vnfs_cnp; @@ -4254,39 +5337,44 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) vp->v_type = param->vnfs_vtype; vp->v_data = param->vnfs_fsnode; - if (param->vnfs_markroot) + if (param->vnfs_markroot) { vp->v_flag |= VROOT; - if (param->vnfs_marksystem) + } + if (param->vnfs_marksystem) { vp->v_flag |= VSYSTEM; + } if (vp->v_type == VREG) { error = ubc_info_init_withsize(vp, param->vnfs_filesize); if (error) { #ifdef JOE_DEBUG record_vp(vp, 1); #endif - vp->v_mount = NULL; - vp->v_op = dead_vnodeop_p; - vp->v_tag = VT_NON; - vp->v_data = NULL; - vp->v_type = VBAD; - vp->v_lflag |= VL_DEAD; + vn_set_dead(vp); vnode_put(vp); - return(error); + return error; + } + if (param->vnfs_mp->mnt_ioflags & MNT_IOFLAGS_IOSCHED_SUPPORTED) { + memory_object_mark_io_tracking(vp->v_ubcinfo->ui_control); } } #ifdef JOE_DEBUG record_vp(vp, 1); #endif +#if CONFIG_FIRMLINKS + vp->v_fmlink = NULLVP; +#endif + vp->v_flag &= ~VFMLINKTARGET; + #if CONFIG_TRIGGERS /* * For trigger vnodes, attach trigger info to vnode */ if ((vp->v_type == VDIR) && (tinfo != NULL)) { - /* + /* * Note: has a side effect of incrementing trigger count on the - * mount if successful, which we would need to undo on a + * mount if successful, which we would need to undo on a * subsequent failure. */ #ifdef JOE_DEBUG @@ -4295,25 +5383,19 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) error = vnode_resolver_create(param->vnfs_mp, vp, tinfo, FALSE); if (error) { printf("vnode_create: vnode_resolver_create() err %d\n", error); - vp->v_mount = NULL; - vp->v_op = dead_vnodeop_p; - vp->v_tag = VT_NON; - vp->v_data = NULL; - vp->v_type = VBAD; - vp->v_lflag |= VL_DEAD; + vn_set_dead(vp); #ifdef JOE_DEBUG record_vp(vp, 1); #endif vnode_put(vp); - return (error); + return error; } } #endif if (vp->v_type == VCHR || vp->v_type == VBLK) { + vp->v_tag = VT_DEVFS; /* callers will reset if needed (bdevvp) */ - vp->v_tag = VT_DEVFS; /* callers will reset if needed (bdevvp) */ - - if ( (nvp = checkalias(vp, param->vnfs_rdev)) ) { + if ((nvp = checkalias(vp, param->vnfs_rdev))) { /* * if checkalias returns a vnode, it will be locked * @@ -4323,7 +5405,7 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) vp->v_op = spec_vnodeop_p; vp->v_type = VBAD; vp->v_lflag = VL_DEAD; - vp->v_data = NULL; + vp->v_data = NULL; vp->v_tag = VT_NON; vnode_put(vp); @@ -4343,14 +5425,22 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) insert = 0; vnode_unlock(vp); } + + if (VCHR == vp->v_type) { + u_int maj = major(vp->v_rdev); + + if (maj < (u_int)nchrdev && cdevsw[maj].d_type == D_TTY) { + vp->v_flag |= VISTTY; + } + } } if (vp->v_type == VFIFO) { struct fifoinfo *fip; MALLOC(fip, struct fifoinfo *, - sizeof(*fip), M_TEMP, M_WAITOK); - bzero(fip, sizeof(struct fifoinfo )); + sizeof(*fip), M_TEMP, M_WAITOK); + bzero(fip, sizeof(struct fifoinfo)); vp->v_fifoinfo = fip; } /* The file systems must pass the address of the location where @@ -4365,26 +5455,19 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) vp->v_lflag |= VNAMED_FSHASH; } if (param->vnfs_mp) { - if (param->vnfs_mp->mnt_kern_flag & MNTK_LOCK_LOCAL) - vp->v_flag |= VLOCKLOCAL; + if (param->vnfs_mp->mnt_kern_flag & MNTK_LOCK_LOCAL) { + vp->v_flag |= VLOCKLOCAL; + } if (insert) { - if ((vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb)) + if ((vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb)) { panic("insmntque: vp on the free list\n"); + } /* * enter in mount vnode list */ insmntque(vp, param->vnfs_mp); } -#ifndef __LP64__ - if ((param->vnfs_mp->mnt_vtable->vfc_vfsflags & VFC_VFSTHREADSAFE) == 0) { - MALLOC_ZONE(vp->v_unsafefs, struct unsafe_fsnode *, - sizeof(struct unsafe_fsnode), M_UNSAFEFS, M_WAITOK); - vp->v_unsafefs->fsnode_count = 0; - vp->v_unsafefs->fsnodeowner = (void *)NULL; - lck_mtx_init(&vp->v_unsafefs->fsnodelock, vnode_lck_grp, vnode_lck_attr); - } -#endif /* __LP64__ */ } if (dvp && vnode_ref(dvp) == 0) { vp->v_parent = dvp; @@ -4398,11 +5481,13 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) * the name entered into the string cache */ vp->v_name = cache_enter_create(dvp, vp, cnp); - } else + } else { vp->v_name = vfs_addname(cnp->cn_nameptr, cnp->cn_namelen, cnp->cn_hash, 0); + } - if ((cnp->cn_flags & UNIONCREATED) == UNIONCREATED) + if ((cnp->cn_flags & UNIONCREATED) == UNIONCREATED) { vp->v_flag |= VISUNION; + } } if ((param->vnfs_flags & VNFS_CANTCACHE) == 0) { /* @@ -4411,56 +5496,161 @@ vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) */ vp->v_flag |= VNCACHEABLE; } - ut = get_bsdthread_info(current_thread()); + ut = get_bsdthread_info(current_thread()); + + if ((current_proc()->p_lflag & P_LRAGE_VNODES) || + (ut->uu_flag & (UT_RAGE_VNODES | UT_KERN_RAGE_VNODES))) { + /* + * process has indicated that it wants any + * vnodes created on its behalf to be rapidly + * aged to reduce the impact on the cached set + * of vnodes + * + * if UT_KERN_RAGE_VNODES is set, then the + * kernel internally wants vnodes to be rapidly + * aged, even if the process hasn't requested + * this + */ + vp->v_flag |= VRAGE; + } + +#if CONFIG_SECLUDED_MEMORY + switch (secluded_for_filecache) { + case 0: + /* + * secluded_for_filecache == 0: + * + no file contents in secluded pool + */ + break; + case 1: + /* + * secluded_for_filecache == 1: + * + no files from / + * + files from /Applications/ are OK + * + files from /Applications/Camera are not OK + * + no files that are open for write + */ + if (vnode_vtype(vp) == VREG && + vnode_mount(vp) != NULL && + (!(vfs_flags(vnode_mount(vp)) & MNT_ROOTFS))) { + /* not from root filesystem: eligible for secluded pages */ + memory_object_mark_eligible_for_secluded( + ubc_getobject(vp, UBC_FLAGS_NONE), + TRUE); + } + break; + case 2: + /* + * secluded_for_filecache == 2: + * + all read-only files OK, except: + * + dyld_shared_cache_arm64* + * + Camera + * + mediaserverd + */ + if (vnode_vtype(vp) == VREG) { + memory_object_mark_eligible_for_secluded( + ubc_getobject(vp, UBC_FLAGS_NONE), + TRUE); + } + break; + default: + break; + } +#endif /* CONFIG_SECLUDED_MEMORY */ + + return 0; + +error_out: + if (existing_vnode) { + vnode_put(vp); + } + return error; +} - if ((current_proc()->p_lflag & P_LRAGE_VNODES) || - (ut->uu_flag & UT_RAGE_VNODES)) { - /* - * process has indicated that it wants any - * vnodes created on its behalf to be rapidly - * aged to reduce the impact on the cached set - * of vnodes - */ - vp->v_flag |= VRAGE; +/* USAGE: + * The following api creates a vnode and associates all the parameter specified in vnode_fsparam + * structure and returns a vnode handle with a reference. device aliasing is handled here so checkalias + * is obsoleted by this. + */ +int +vnode_create(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) +{ + *vpp = NULLVP; + return vnode_create_internal(flavor, size, data, vpp, 1); +} + +int +vnode_create_empty(vnode_t *vpp) +{ + *vpp = NULLVP; + return vnode_create_internal(VNCREATE_FLAVOR, VCREATESIZE, NULL, + vpp, 0); +} + +int +vnode_initialize(uint32_t flavor, uint32_t size, void *data, vnode_t *vpp) +{ + if (*vpp == NULLVP) { + panic("NULL vnode passed to vnode_initialize"); } - return (0); +#if DEVELOPMENT || DEBUG + /* + * We lock to check that vnode is fit for unlocked use in + * vnode_create_internal. + */ + vnode_lock_spin(*vpp); + VNASSERT(((*vpp)->v_iocount == 1), *vpp, + ("vnode_initialize : iocount not 1, is %d", (*vpp)->v_iocount)); + VNASSERT(((*vpp)->v_usecount == 0), *vpp, + ("vnode_initialize : usecount not 0, is %d", (*vpp)->v_usecount)); + VNASSERT(((*vpp)->v_lflag & VL_DEAD), *vpp, + ("vnode_initialize : v_lflag does not have VL_DEAD, is 0x%x", + (*vpp)->v_lflag)); + VNASSERT(((*vpp)->v_data == NULL), *vpp, + ("vnode_initialize : v_data not NULL")); + vnode_unlock(*vpp); +#endif + return vnode_create_internal(flavor, size, data, vpp, 1); } int vnode_addfsref(vnode_t vp) { vnode_lock_spin(vp); - if (vp->v_lflag & VNAMED_FSHASH) + if (vp->v_lflag & VNAMED_FSHASH) { panic("add_fsref: vp already has named reference"); - if ((vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb)) - panic("addfsref: vp on the free list\n"); + } + if ((vp->v_freelist.tqe_prev != (struct vnode **)0xdeadb)) { + panic("addfsref: vp on the free list\n"); + } vp->v_lflag |= VNAMED_FSHASH; vnode_unlock(vp); - return(0); - + return 0; } int vnode_removefsref(vnode_t vp) { vnode_lock_spin(vp); - if ((vp->v_lflag & VNAMED_FSHASH) == 0) + if ((vp->v_lflag & VNAMED_FSHASH) == 0) { panic("remove_fsref: no named reference"); + } vp->v_lflag &= ~VNAMED_FSHASH; vnode_unlock(vp); - return(0); - + return 0; } int vfs_iterate(int flags, int (*callout)(mount_t, void *), void *arg) { - mount_t mp; + mount_t mp; int ret = 0; fsid_t * fsid_list; - int count, actualcount, i; + int count, actualcount, i; void * allocmem; int indx_start, indx_stop, indx_incr; + int cb_dropref = (flags & VFS_ITERATE_CB_DROPREF); + int noskip_unmount = (flags & VFS_ITERATE_NOSKIP_UNMOUNT); count = mount_getvfscnt(); count += 10; @@ -4478,32 +5668,38 @@ vfs_iterate(int flags, int (*callout)(mount_t, void *), void *arg) indx_start = actualcount - 1; indx_stop = -1; indx_incr = -1; - } else /* Head first by default */ { + } else { /* Head first by default */ indx_start = 0; indx_stop = actualcount; indx_incr = 1; } - for (i=indx_start; i != indx_stop; i += indx_incr) { - + for (i = indx_start; i != indx_stop; i += indx_incr) { /* obtain the mount point with iteration reference */ mp = mount_list_lookupby_fsid(&fsid_list[i], 0, 1); - if(mp == (struct mount *)0) + if (mp == (struct mount *)0) { continue; + } mount_lock(mp); - if (mp->mnt_lflag & (MNT_LDEAD | MNT_LUNMOUNT)) { + if ((mp->mnt_lflag & MNT_LDEAD) || + (!noskip_unmount && (mp->mnt_lflag & MNT_LUNMOUNT))) { mount_unlock(mp); mount_iterdrop(mp); continue; - } mount_unlock(mp); /* iterate over all the vnodes */ ret = callout(mp, arg); - mount_iterdrop(mp); + /* + * Drop the iterref here if the callback didn't do it. + * Note: If cb_dropref is set the mp may no longer exist. + */ + if (!cb_dropref) { + mount_iterdrop(mp); + } switch (ret) { case VFS_RETURNED: @@ -4526,7 +5722,7 @@ vfs_iterate(int flags, int (*callout)(mount_t, void *), void *arg) out: kfree(allocmem, (count * sizeof(fsid_t))); - return (ret); + return ret; } /* @@ -4538,8 +5734,8 @@ out: int vfs_update_vfsstat(mount_t mp, vfs_context_t ctx, __unused int eventtype) { - struct vfs_attr va; - int error; + struct vfs_attr va; + int error; /* * Request the attributes we want to propagate into @@ -4555,19 +5751,19 @@ vfs_update_vfsstat(mount_t mp, vfs_context_t ctx, __unused int eventtype) VFSATTR_WANTED(&va, f_ffree); VFSATTR_WANTED(&va, f_bsize); VFSATTR_WANTED(&va, f_fssubtype); + + if ((error = vfs_getattr(mp, &va, ctx)) != 0) { + KAUTH_DEBUG("STAT - filesystem returned error %d", error); + return error; + } #if CONFIG_MACF if (eventtype == VFS_USER_EVENT) { error = mac_mount_check_getattr(ctx, mp, &va); - if (error != 0) - return (error); + if (error != 0) { + return error; + } } #endif - - if ((error = vfs_getattr(mp, &va, ctx)) != 0) { - KAUTH_DEBUG("STAT - filesystem returned error %d", error); - return(error); - } - /* * Unpack into the per-mount structure. * @@ -4590,31 +5786,38 @@ vfs_update_vfsstat(mount_t mp, vfs_context_t ctx, __unused int eventtype) /* 4822056 - protect against malformed server mount */ mp->mnt_vfsstat.f_bsize = (va.f_bsize > 0 ? va.f_bsize : 512); } else { - mp->mnt_vfsstat.f_bsize = mp->mnt_devblocksize; /* default from the device block size */ + mp->mnt_vfsstat.f_bsize = mp->mnt_devblocksize; /* default from the device block size */ } if (VFSATTR_IS_SUPPORTED(&va, f_iosize)) { mp->mnt_vfsstat.f_iosize = va.f_iosize; } else { - mp->mnt_vfsstat.f_iosize = 1024 * 1024; /* 1MB sensible I/O size */ + mp->mnt_vfsstat.f_iosize = 1024 * 1024; /* 1MB sensible I/O size */ } - if (VFSATTR_IS_SUPPORTED(&va, f_blocks)) + if (VFSATTR_IS_SUPPORTED(&va, f_blocks)) { mp->mnt_vfsstat.f_blocks = va.f_blocks; - if (VFSATTR_IS_SUPPORTED(&va, f_bfree)) + } + if (VFSATTR_IS_SUPPORTED(&va, f_bfree)) { mp->mnt_vfsstat.f_bfree = va.f_bfree; - if (VFSATTR_IS_SUPPORTED(&va, f_bavail)) + } + if (VFSATTR_IS_SUPPORTED(&va, f_bavail)) { mp->mnt_vfsstat.f_bavail = va.f_bavail; - if (VFSATTR_IS_SUPPORTED(&va, f_bused)) + } + if (VFSATTR_IS_SUPPORTED(&va, f_bused)) { mp->mnt_vfsstat.f_bused = va.f_bused; - if (VFSATTR_IS_SUPPORTED(&va, f_files)) + } + if (VFSATTR_IS_SUPPORTED(&va, f_files)) { mp->mnt_vfsstat.f_files = va.f_files; - if (VFSATTR_IS_SUPPORTED(&va, f_ffree)) + } + if (VFSATTR_IS_SUPPORTED(&va, f_ffree)) { mp->mnt_vfsstat.f_ffree = va.f_ffree; + } /* this is unlikely to change, but has to be queried for */ - if (VFSATTR_IS_SUPPORTED(&va, f_fssubtype)) + if (VFSATTR_IS_SUPPORTED(&va, f_fssubtype)) { mp->mnt_vfsstat.f_fssubtype = va.f_fssubtype; + } - return(0); + return 0; } int @@ -4626,7 +5829,7 @@ mount_list_add(mount_t mp) if (system_inshutdown != 0) { res = -1; } else { - TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); + TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list); nummounts++; res = 0; } @@ -4659,7 +5862,7 @@ mount_lookupby_volfsid(int volfs_id, int withref) (mp->mnt_vfsstat.f_fsid.val[0] == volfs_id)) { cur_mount = mp; if (withref) { - if (mount_iterref(cur_mount, 1)) { + if (mount_iterref(cur_mount, 1)) { cur_mount = (mount_t)0; mount_list_unlock(); goto out; @@ -4677,64 +5880,87 @@ mount_lookupby_volfsid(int volfs_id, int withref) mount_iterdrop(mp); } out: - return(cur_mount); + return cur_mount; } -mount_t +mount_t mount_list_lookupby_fsid(fsid_t *fsid, int locked, int withref) { mount_t retmp = (mount_t)0; mount_t mp; - if (!locked) + if (!locked) { mount_list_lock(); - TAILQ_FOREACH(mp, &mountlist, mnt_list) - if (mp->mnt_vfsstat.f_fsid.val[0] == fsid->val[0] && - mp->mnt_vfsstat.f_fsid.val[1] == fsid->val[1]) { - retmp = mp; - if (withref) { - if (mount_iterref(retmp, 1)) - retmp = (mount_t)0; + } + TAILQ_FOREACH(mp, &mountlist, mnt_list) + if (mp->mnt_vfsstat.f_fsid.val[0] == fsid->val[0] && + mp->mnt_vfsstat.f_fsid.val[1] == fsid->val[1]) { + retmp = mp; + if (withref) { + if (mount_iterref(retmp, 1)) { + retmp = (mount_t)0; } - goto out; } + goto out; + } out: - if (!locked) + if (!locked) { mount_list_unlock(); - return (retmp); + } + return retmp; } errno_t -vnode_lookup(const char *path, int flags, vnode_t *vpp, vfs_context_t ctx) +vnode_lookupat(const char *path, int flags, vnode_t *vpp, vfs_context_t ctx, + vnode_t start_dvp) { struct nameidata nd; int error; u_int32_t ndflags = 0; - if (ctx == NULL) { /* XXX technically an error */ - ctx = vfs_context_current(); + if (ctx == NULL) { + return EINVAL; } - if (flags & VNODE_LOOKUP_NOFOLLOW) + if (flags & VNODE_LOOKUP_NOFOLLOW) { ndflags = NOFOLLOW; - else + } else { ndflags = FOLLOW; + } - if (flags & VNODE_LOOKUP_NOCROSSMOUNT) + if (flags & VNODE_LOOKUP_NOCROSSMOUNT) { ndflags |= NOCROSSMOUNT; - if (flags & VNODE_LOOKUP_DOWHITEOUT) - ndflags |= DOWHITEOUT; + } + + if (flags & VNODE_LOOKUP_CROSSMOUNTNOWAIT) { + ndflags |= CN_NBMOUNTLOOK; + } /* XXX AUDITVNPATH1 needed ? */ NDINIT(&nd, LOOKUP, OP_LOOKUP, ndflags, UIO_SYSSPACE, - CAST_USER_ADDR_T(path), ctx); + CAST_USER_ADDR_T(path), ctx); + + if (start_dvp && (path[0] != '/')) { + nd.ni_dvp = start_dvp; + nd.ni_cnd.cn_flags |= USEDVP; + } + + if ((error = namei(&nd))) { + return error; + } + + nd.ni_cnd.cn_flags &= ~USEDVP; - if ((error = namei(&nd))) - return (error); *vpp = nd.ni_vp; nameidone(&nd); - - return (0); + + return 0; +} + +errno_t +vnode_lookup(const char *path, int flags, vnode_t *vpp, vfs_context_t ctx) +{ + return vnode_lookupat(path, flags, vpp, ctx, NULLVP); } errno_t @@ -4745,33 +5971,39 @@ vnode_open(const char *path, int fmode, int cmode, int flags, vnode_t *vpp, vfs_ u_int32_t ndflags = 0; int lflags = flags; - if (ctx == NULL) { /* XXX technically an error */ + if (ctx == NULL) { /* XXX technically an error */ ctx = vfs_context_current(); } - if (fmode & O_NOFOLLOW) + if (fmode & O_NOFOLLOW) { lflags |= VNODE_LOOKUP_NOFOLLOW; + } - if (lflags & VNODE_LOOKUP_NOFOLLOW) + if (lflags & VNODE_LOOKUP_NOFOLLOW) { ndflags = NOFOLLOW; - else + } else { ndflags = FOLLOW; + } - if (lflags & VNODE_LOOKUP_NOCROSSMOUNT) + if (lflags & VNODE_LOOKUP_NOCROSSMOUNT) { ndflags |= NOCROSSMOUNT; - if (lflags & VNODE_LOOKUP_DOWHITEOUT) - ndflags |= DOWHITEOUT; - + } + + if (lflags & VNODE_LOOKUP_CROSSMOUNTNOWAIT) { + ndflags |= CN_NBMOUNTLOOK; + } + /* XXX AUDITVNPATH1 needed ? */ NDINIT(&nd, LOOKUP, OP_OPEN, ndflags, UIO_SYSSPACE, - CAST_USER_ADDR_T(path), ctx); + CAST_USER_ADDR_T(path), ctx); - if ((error = vn_open(&nd, fmode, cmode))) + if ((error = vn_open(&nd, fmode, cmode))) { *vpp = NULL; - else + } else { *vpp = nd.ni_vp; - - return (error); + } + + return error; } errno_t @@ -4782,10 +6014,40 @@ vnode_close(vnode_t vp, int flags, vfs_context_t ctx) if (ctx == NULL) { ctx = vfs_context_current(); } - + error = vn_close(vp, flags, ctx); vnode_put(vp); - return (error); + return error; +} + +errno_t +vnode_mtime(vnode_t vp, struct timespec *mtime, vfs_context_t ctx) +{ + struct vnode_attr va; + int error; + + VATTR_INIT(&va); + VATTR_WANTED(&va, va_modify_time); + error = vnode_getattr(vp, &va, ctx); + if (!error) { + *mtime = va.va_modify_time; + } + return error; +} + +errno_t +vnode_flags(vnode_t vp, uint32_t *flags, vfs_context_t ctx) +{ + struct vnode_attr va; + int error; + + VATTR_INIT(&va); + VATTR_WANTED(&va, va_flags); + error = vnode_getattr(vp, &va, ctx); + if (!error) { + *flags = va.va_flags; + } + return error; } /* @@ -4795,26 +6057,57 @@ vnode_close(vnode_t vp, int flags, vfs_context_t ctx) errno_t vnode_size(vnode_t vp, off_t *sizep, vfs_context_t ctx) { - struct vnode_attr va; - int error; + struct vnode_attr va; + int error; VATTR_INIT(&va); VATTR_WANTED(&va, va_data_size); error = vnode_getattr(vp, &va, ctx); - if (!error) + if (!error) { *sizep = va.va_data_size; - return(error); + } + return error; } errno_t vnode_setsize(vnode_t vp, off_t size, int ioflag, vfs_context_t ctx) { - struct vnode_attr va; + struct vnode_attr va; VATTR_INIT(&va); VATTR_SET(&va, va_data_size, size); va.va_vaflags = ioflag & 0xffff; - return(vnode_setattr(vp, &va, ctx)); + return vnode_setattr(vp, &va, ctx); +} + +int +vnode_setdirty(vnode_t vp) +{ + vnode_lock_spin(vp); + vp->v_flag |= VISDIRTY; + vnode_unlock(vp); + return 0; +} + +int +vnode_cleardirty(vnode_t vp) +{ + vnode_lock_spin(vp); + vp->v_flag &= ~VISDIRTY; + vnode_unlock(vp); + return 0; +} + +int +vnode_isdirty(vnode_t vp) +{ + int dirty; + + vnode_lock_spin(vp); + dirty = (vp->v_flag & VISDIRTY) ? 1 : 0; + vnode_unlock(vp); + + return dirty; } static int @@ -4823,7 +6116,7 @@ vn_create_reg(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_att /* Only use compound VNOP for compound operation */ if (vnode_compound_open_available(dvp) && ((flags & VN_CREATE_DOOPEN) != 0)) { *vpp = NULLVP; - return VNOP_COMPOUND_OPEN(dvp, vpp, ndp, VNOP_COMPOUND_OPEN_DO_CREATE, fmode, statusp, vap, ctx); + return VNOP_COMPOUND_OPEN(dvp, vpp, ndp, O_CREAT, fmode, statusp, vap, ctx); } else { return VNOP_CREATE(dvp, vpp, &ndp->ni_cnd, vap, ctx); } @@ -4846,7 +6139,7 @@ vn_create_reg(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_att * flags VN_* flags controlling ACL inheritance * and whether or not authorization is to * be required for the operation. - * + * * Returns: 0 Success * !0 errno value * @@ -4855,10 +6148,10 @@ vn_create_reg(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_att * *cnp May be modified by the underlying VFS. * *vap May be modified by the underlying VFS. * modified by either ACL inheritance or - * - * + * + * * be modified, even if the operation is - * + * * * Notes: The kauth_filesec_t in 'vap', if any, is in host byte order. * @@ -4873,7 +6166,7 @@ vn_create_reg(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_att errno_t vn_create(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *vap, uint32_t flags, int fmode, uint32_t *statusp, vfs_context_t ctx) { - errno_t error, old_error; + errno_t error, old_error; vnode_t vp = (vnode_t)0; boolean_t batched; struct componentname *cnp; @@ -4885,10 +6178,12 @@ vn_create(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *v KAUTH_DEBUG("%p CREATE - '%s'", dvp, cnp->cn_nameptr); - if (flags & VN_CREATE_NOINHERIT) + if (flags & VN_CREATE_NOINHERIT) { vap->va_vaflags |= VA_NOINHERIT; - if (flags & VN_CREATE_NOAUTH) + } + if (flags & VN_CREATE_NOAUTH) { vap->va_vaflags |= VA_NOAUTH; + } /* * Handle ACL inheritance, initialize vap. */ @@ -4904,10 +6199,11 @@ vn_create(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *v panic("Mode for open, but not trying to open..."); } + /* * Create the requested node. */ - switch(vap->va_type) { + switch (vap->va_type) { case VREG: error = vn_create_reg(dvp, vpp, ndp, vap, flags, fmode, statusp, ctx); break; @@ -4934,8 +6230,9 @@ vn_create(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *v #if CONFIG_MACF if (!(flags & VN_CREATE_NOLABEL)) { error = vnode_label(vnode_mount(vp), dvp, vp, cnp, VNODE_LABEL_CREATE, ctx); - if (error) + if (error) { goto error; + } } #endif @@ -4951,7 +6248,6 @@ vn_create(vnode_t dvp, vnode_t *vpp, struct nameidata *ndp, struct vnode_attr *v error: #endif if ((error != 0) && (vp != (vnode_t)0)) { - /* If we've done a compound open, close */ if (batched && (old_error == 0) && (vap->va_type == VREG)) { VNOP_CLOSE(vp, fmode, ctx); @@ -4961,33 +6257,43 @@ error: if (!batched) { *vpp = (vnode_t) 0; vnode_put(vp); + vp = NULLVP; } } + /* + * For creation VNOPs, this is the equivalent of + * lookup_handle_found_vnode. + */ + if (kdebug_enable && *vpp) { + kdebug_lookup(*vpp, cnp); + } + out: vn_attribute_cleanup(vap, defaulted); - return(error); + return error; } -static kauth_scope_t vnode_scope; -static int vnode_authorize_callback(kauth_cred_t credential, void *idata, kauth_action_t action, - uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3); -static int vnode_authorize_callback_int(__unused kauth_cred_t credential, __unused void *idata, kauth_action_t action, +static kauth_scope_t vnode_scope; +static int vnode_authorize_callback(kauth_cred_t credential, void *idata, kauth_action_t action, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3); +static int vnode_authorize_callback_int(kauth_action_t action, vfs_context_t ctx, + vnode_t vp, vnode_t dvp, int *errorp); typedef struct _vnode_authorize_context { - vnode_t vp; + vnode_t vp; struct vnode_attr *vap; - vnode_t dvp; + vnode_t dvp; struct vnode_attr *dvap; - vfs_context_t ctx; - int flags; - int flags_valid; -#define _VAC_IS_OWNER (1<<0) -#define _VAC_IN_GROUP (1<<1) -#define _VAC_IS_DIR_OWNER (1<<2) -#define _VAC_IN_DIR_GROUP (1<<3) + vfs_context_t ctx; + int flags; + int flags_valid; +#define _VAC_IS_OWNER (1<<0) +#define _VAC_IN_GROUP (1<<1) +#define _VAC_IS_DIR_OWNER (1<<2) +#define _VAC_IN_DIR_GROUP (1<<3) +#define _VAC_NO_VNODE_POINTERS (1<<4) } *vauth_ctx; void @@ -4996,9 +6302,9 @@ vnode_authorize_init(void) vnode_scope = kauth_register_scope(KAUTH_SCOPE_VNODE, vnode_authorize_callback, NULL); } -#define VATTR_PREPARE_DEFAULTED_UID 0x1 -#define VATTR_PREPARE_DEFAULTED_GID 0x2 -#define VATTR_PREPARE_DEFAULTED_MODE 0x4 +#define VATTR_PREPARE_DEFAULTED_UID 0x1 +#define VATTR_PREPARE_DEFAULTED_GID 0x2 +#define VATTR_PREPARE_DEFAULTED_MODE 0x4 int vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fieldsp, vfs_context_t ctx) @@ -5017,12 +6323,12 @@ vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fi vap->va_acl = NULL; if ((error = kauth_acl_inherit(dvp, - oacl, - &nacl, - vap->va_type == VDIR, - ctx)) != 0) { + oacl, + &nacl, + vap->va_type == VDIR, + ctx)) != 0) { KAUTH_DEBUG("%p CREATE - error %d processing inheritance", dvp, error); - return(error); + return error; } /* @@ -5036,11 +6342,11 @@ vn_attribute_prepare(vnode_t dvp, struct vnode_attr *vap, uint32_t *defaulted_fi VATTR_SET(vap, va_acl, nacl); } } - + error = vnode_authattr_new_internal(dvp, vap, (vap->va_vaflags & VA_NOAUTH), defaulted_fieldsp, ctx); if (error) { vn_attribute_cleanup(vap, *defaulted_fieldsp); - } + } return error; } @@ -5059,7 +6365,7 @@ vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields) nacl = vap->va_acl; oacl = vap->va_base_acl; - if (oacl) { + if (oacl) { VATTR_SET(vap, va_acl, oacl); vap->va_base_acl = NULL; } else { @@ -5087,24 +6393,29 @@ vn_attribute_cleanup(struct vnode_attr *vap, uint32_t defaulted_fields) int vn_authorize_unlink(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, __unused void *reserved) { +#if !CONFIG_MACF +#pragma unused(cnp) +#endif int error = 0; /* - * Normally, unlinking of directories is not supported. + * Normally, unlinking of directories is not supported. * However, some file systems may have limited support. */ if ((vp->v_type == VDIR) && - !(vp->v_mount->mnt_vtable->vfc_vfsflags & VFC_VFSDIRLINKS)) { - return (EPERM); /* POSIX */ + !(vp->v_mount->mnt_kern_flag & MNTK_DIR_HARDLINKS)) { + return EPERM; /* POSIX */ } /* authorize the delete operation */ #if CONFIG_MACF - if (!error) + if (!error) { error = mac_vnode_check_unlink(ctx, dvp, vp, cnp); + } #endif /* MAC */ - if (!error) + if (!error) { error = vnode_authorize(vp, dvp, KAUTH_VNODE_DELETE, ctx); + } return error; } @@ -5115,7 +6426,6 @@ vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs /* Open of existing case */ kauth_action_t action; int error = 0; - if (cnp->cn_ndp == NULL) { panic("NULL ndp"); } @@ -5127,44 +6437,45 @@ vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs /* XXX may do duplicate work here, but ignore that for now (idempotent) */ if (vfs_flags(vnode_mount(vp)) & MNT_MULTILABEL) { error = vnode_label(vnode_mount(vp), NULL, vp, NULL, 0, ctx); - if (error) - return (error); + if (error) { + return error; + } } #endif - if ( (fmode & O_DIRECTORY) && vp->v_type != VDIR ) { - return (ENOTDIR); + if ((fmode & O_DIRECTORY) && vp->v_type != VDIR) { + return ENOTDIR; } if (vp->v_type == VSOCK && vp->v_tag != VT_FDESC) { - return (EOPNOTSUPP); /* Operation not supported on socket */ + return EOPNOTSUPP; /* Operation not supported on socket */ } if (vp->v_type == VLNK && (fmode & O_NOFOLLOW) != 0) { - return (ELOOP); /* O_NOFOLLOW was specified and the target is a symbolic link */ + return ELOOP; /* O_NOFOLLOW was specified and the target is a symbolic link */ } /* disallow write operations on directories */ if (vnode_isdir(vp) && (fmode & (FWRITE | O_TRUNC))) { - return (EISDIR); + return EISDIR; } if ((cnp->cn_ndp->ni_flag & NAMEI_TRAILINGSLASH)) { if (vp->v_type != VDIR) { - return (ENOTDIR); + return ENOTDIR; } } #if CONFIG_MACF - /* If a file being opened is a shadow file containing - * namedstream data, ignore the macf checks because it - * is a kernel internal file and access should always + /* If a file being opened is a shadow file containing + * namedstream data, ignore the macf checks because it + * is a kernel internal file and access should always * be allowed. */ if (!(vnode_isshadow(vp) && vnode_isnamedstream(vp))) { error = mac_vnode_check_open(ctx, vp, fmode); if (error) { - return (error); + return error; } } #endif @@ -5187,12 +6498,30 @@ vn_authorize_open_existing(vnode_t vp, struct componentname *cnp, int fmode, vfs action |= KAUTH_VNODE_WRITE_DATA; } } - return (vnode_authorize(vp, NULL, action, ctx)); + error = vnode_authorize(vp, NULL, action, ctx); +#if NAMEDSTREAMS + if (error == EACCES) { + /* + * Shadow files may exist on-disk with a different UID/GID + * than that of the current context. Verify that this file + * is really a shadow file. If it was created successfully + * then it should be authorized. + */ + if (vnode_isshadow(vp) && vnode_isnamedstream(vp)) { + error = vnode_verifynamedstream(vp); + } + } +#endif + + return error; } int vn_authorize_create(vnode_t dvp, struct componentname *cnp, struct vnode_attr *vap, vfs_context_t ctx, void *reserved) { +#if !CONFIG_MACF +#pragma unused(vap) +#endif /* Creation case */ int error; @@ -5206,26 +6535,45 @@ vn_authorize_create(vnode_t dvp, struct componentname *cnp, struct vnode_attr *v /* Only validate path for creation if we didn't do a complete lookup */ if (cnp->cn_ndp->ni_flag & NAMEI_UNFINISHED) { error = lookup_validate_creation_path(cnp->cn_ndp); - if (error) - return (error); + if (error) { + return error; + } } #if CONFIG_MACF error = mac_vnode_check_create(ctx, dvp, cnp, vap); - if (error) - return (error); + if (error) { + return error; + } #endif /* CONFIG_MACF */ - return (vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx)); + return vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_FILE, ctx); } -int -vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, - struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, - vfs_context_t ctx, void *reserved) +int +vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, + struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, + vfs_context_t ctx, void *reserved) +{ + return vn_authorize_renamex(fdvp, fvp, fcnp, tdvp, tvp, tcnp, ctx, 0, reserved); +} + +int +vn_authorize_renamex(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, + struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, + vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved) +{ + return vn_authorize_renamex_with_paths(fdvp, fvp, fcnp, NULL, tdvp, tvp, tcnp, NULL, ctx, flags, reserved); +} + +int +vn_authorize_renamex_with_paths(struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp, const char *from_path, + struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp, const char *to_path, + vfs_context_t ctx, vfs_rename_flags_t flags, void *reserved) { int error = 0; int moving = 0; + bool swap = flags & VFS_RENAME_SWAP; if (reserved != NULL) { panic("Passed something other than NULL as reserved field!"); @@ -5239,42 +6587,54 @@ vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentnam */ if (fvp->v_type == VDIR && ((fdvp == fvp) || - (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || - ((fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT)) ) { + (fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') || + ((fcnp->cn_flags | tcnp->cn_flags) & ISDOTDOT))) { error = EINVAL; goto out; } if (tvp == NULLVP && vnode_compound_rename_available(tdvp)) { error = lookup_validate_creation_path(tcnp->cn_ndp); - if (error) + if (error) { goto out; + } } /***** *****/ #if CONFIG_MACF - error = mac_vnode_check_rename_from(ctx, fdvp, fvp, fcnp); - if (error) - goto out; -#endif - -#if CONFIG_MACF - error = mac_vnode_check_rename_to(ctx, - tdvp, tvp, fdvp == tdvp, tcnp); - if (error) + error = mac_vnode_check_rename(ctx, fdvp, fvp, fcnp, tdvp, tvp, tcnp); + if (error) { goto out; + } + if (swap) { + error = mac_vnode_check_rename(ctx, tdvp, tvp, tcnp, fdvp, fvp, fcnp); + if (error) { + goto out; + } + } #endif /***** *****/ /***** *****/ if (tvp != NULL) { - if (fvp->v_type == VDIR && tvp->v_type != VDIR) { - error = ENOTDIR; - goto out; - } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { - error = EISDIR; - goto out; + if (!swap) { + if (fvp->v_type == VDIR && tvp->v_type != VDIR) { + error = ENOTDIR; + goto out; + } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { + error = EISDIR; + goto out; + } } + } else if (swap) { + /* + * Caller should have already checked this and returned + * ENOENT. If we send back ENOENT here, caller will retry + * which isn't what we want so we send back EINVAL here + * instead. + */ + error = EINVAL; + goto out; } if (fvp == tdvp) { @@ -5301,51 +6661,133 @@ vn_authorize_rename(struct vnode *fdvp, struct vnode *fvp, struct componentnam error = EINVAL; goto out; } - /***** *****/ - - /***** *****/ - error = 0; - if ((tvp != NULL) && vnode_isdir(tvp)) { - if (tvp != fdvp) - moving = 1; - } else if (tdvp != fdvp) { - moving = 1; + if (swap && fdvp->v_parent == tvp) { + error = EINVAL; + goto out; } + /***** *****/ + /***** *****/ /* - * must have delete rights to remove the old name even in - * the simple case of fdvp == tdvp. + * As part of the Kauth step, we call out to allow 3rd-party + * fileop notification of "about to rename". This is needed + * in the event that 3rd-parties need to know that the DELETE + * authorization is actually part of a rename. It's important + * that we guarantee that the DELETE call-out will always be + * made if the WILL_RENAME call-out is made. Another fileop + * call-out will be performed once the operation is completed. + * We can ignore the result of kauth_authorize_fileop(). * - * If fvp is a directory, and we are changing it's parent, - * then we also need rights to rewrite its ".." entry as well. + * N.B. We are passing the vnode and *both* paths to each + * call; kauth_authorize_fileop() extracts the "from" path + * when posting a KAUTH_FILEOP_WILL_RENAME notification. + * As such, we only post these notifications if all of the + * information we need is provided. */ - if (vnode_isdir(fvp)) { - if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE | KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0) + + if (swap) { + kauth_action_t f = 0, t = 0; + + /* + * Directories changing parents need ...ADD_SUBDIR... to + * permit changing ".." + */ + if (fdvp != tdvp) { + if (vnode_isdir(fvp)) { + f = KAUTH_VNODE_ADD_SUBDIRECTORY; + } + if (vnode_isdir(tvp)) { + t = KAUTH_VNODE_ADD_SUBDIRECTORY; + } + } + if (to_path != NULL) { + kauth_authorize_fileop(vfs_context_ucred(ctx), + KAUTH_FILEOP_WILL_RENAME, + (uintptr_t)fvp, + (uintptr_t)to_path); + } + error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE | f, ctx); + if (error) { goto out; - } else { - if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE, ctx)) != 0) + } + if (from_path != NULL) { + kauth_authorize_fileop(vfs_context_ucred(ctx), + KAUTH_FILEOP_WILL_RENAME, + (uintptr_t)tvp, + (uintptr_t)from_path); + } + error = vnode_authorize(tvp, tdvp, KAUTH_VNODE_DELETE | t, ctx); + if (error) { goto out; - } - if (moving) { - /* moving into tdvp or tvp, must have rights to add */ - if ((error = vnode_authorize(((tvp != NULL) && vnode_isdir(tvp)) ? tvp : tdvp, - NULL, - vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE, - ctx)) != 0) { + } + f = vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE; + t = vnode_isdir(tvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE; + if (fdvp == tdvp) { + error = vnode_authorize(fdvp, NULL, f | t, ctx); + } else { + error = vnode_authorize(fdvp, NULL, t, ctx); + if (error) { + goto out; + } + error = vnode_authorize(tdvp, NULL, f, ctx); + } + if (error) { goto out; } - } else { - /* node staying in same directory, must be allowed to add new name */ - if ((error = vnode_authorize(fdvp, NULL, - vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE, ctx)) != 0) + } else { + error = 0; + if ((tvp != NULL) && vnode_isdir(tvp)) { + if (tvp != fdvp) { + moving = 1; + } + } else if (tdvp != fdvp) { + moving = 1; + } + + /* + * must have delete rights to remove the old name even in + * the simple case of fdvp == tdvp. + * + * If fvp is a directory, and we are changing it's parent, + * then we also need rights to rewrite its ".." entry as well. + */ + if (to_path != NULL) { + kauth_authorize_fileop(vfs_context_ucred(ctx), + KAUTH_FILEOP_WILL_RENAME, + (uintptr_t)fvp, + (uintptr_t)to_path); + } + if (vnode_isdir(fvp)) { + if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE | KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0) { + goto out; + } + } else { + if ((error = vnode_authorize(fvp, fdvp, KAUTH_VNODE_DELETE, ctx)) != 0) { + goto out; + } + } + if (moving) { + /* moving into tdvp or tvp, must have rights to add */ + if ((error = vnode_authorize(((tvp != NULL) && vnode_isdir(tvp)) ? tvp : tdvp, + NULL, + vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE, + ctx)) != 0) { + goto out; + } + } else { + /* node staying in same directory, must be allowed to add new name */ + if ((error = vnode_authorize(fdvp, NULL, + vnode_isdir(fvp) ? KAUTH_VNODE_ADD_SUBDIRECTORY : KAUTH_VNODE_ADD_FILE, ctx)) != 0) { + goto out; + } + } + /* overwriting tvp */ + if ((tvp != NULL) && !vnode_isdir(tvp) && + ((error = vnode_authorize(tvp, tdvp, KAUTH_VNODE_DELETE, ctx)) != 0)) { goto out; - } - /* overwriting tvp */ - if ((tvp != NULL) && !vnode_isdir(tvp) && - ((error = vnode_authorize(tvp, tdvp, KAUTH_VNODE_DELETE, ctx)) != 0)) { - goto out; + } } /***** *****/ @@ -5358,10 +6800,13 @@ out: int vn_authorize_mkdir(vnode_t dvp, struct componentname *cnp, struct vnode_attr *vap, vfs_context_t ctx, void *reserved) { +#if !CONFIG_MACF +#pragma unused(vap) +#endif int error; if (reserved != NULL) { - panic("reserved not NULL in vn_authorize_mkdir()"); + panic("reserved not NULL in vn_authorize_mkdir()"); } /* XXX A hack for now, to make shadow files work */ @@ -5371,21 +6816,24 @@ vn_authorize_mkdir(vnode_t dvp, struct componentname *cnp, struct vnode_attr *va if (vnode_compound_mkdir_available(dvp)) { error = lookup_validate_creation_path(cnp->cn_ndp); - if (error) + if (error) { goto out; + } } #if CONFIG_MACF error = mac_vnode_check_create(ctx, dvp, cnp, vap); - if (error) + if (error) { goto out; + } #endif - /* authorize addition of a directory to the parent */ - if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0) - goto out; - + /* authorize addition of a directory to the parent */ + if ((error = vnode_authorize(dvp, NULL, KAUTH_VNODE_ADD_SUBDIRECTORY, ctx)) != 0) { + goto out; + } + out: return error; } @@ -5393,8 +6841,11 @@ out: int vn_authorize_rmdir(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_context_t ctx, void *reserved) { +#if CONFIG_MACF int error; - +#else +#pragma unused(cnp) +#endif if (reserved != NULL) { panic("Non-NULL reserved argument to vn_authorize_rmdir()"); } @@ -5404,25 +6855,135 @@ vn_authorize_rmdir(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_conte * rmdir only deals with directories */ return ENOTDIR; - } - + } + if (dvp == vp) { /* * No rmdir "." please. */ return EINVAL; - } - + } + #if CONFIG_MACF error = mac_vnode_check_unlink(ctx, dvp, - vp, cnp); - if (error) + vp, cnp); + if (error) { return error; + } #endif return vnode_authorize(vp, dvp, KAUTH_VNODE_DELETE, ctx); } +/* + * Authorizer for directory cloning. This does not use vnodes but instead + * uses prefilled vnode attributes from the filesystem. + * + * The same function is called to set up the attributes required, perform the + * authorization and cleanup (if required) + */ +int +vnode_attr_authorize_dir_clone(struct vnode_attr *vap, kauth_action_t action, + struct vnode_attr *dvap, __unused vnode_t sdvp, mount_t mp, + dir_clone_authorizer_op_t vattr_op, uint32_t flags, vfs_context_t ctx, + __unused void *reserved) +{ + int error; + int is_suser = vfs_context_issuser(ctx); + + if (vattr_op == OP_VATTR_SETUP) { + VATTR_INIT(vap); + + /* + * When ACL inheritence is implemented, both vap->va_acl and + * dvap->va_acl will be required (even as superuser). + */ + VATTR_WANTED(vap, va_type); + VATTR_WANTED(vap, va_mode); + VATTR_WANTED(vap, va_flags); + VATTR_WANTED(vap, va_uid); + VATTR_WANTED(vap, va_gid); + if (dvap) { + VATTR_INIT(dvap); + VATTR_WANTED(dvap, va_flags); + } + + if (!is_suser) { + /* + * If not superuser, we have to evaluate ACLs and + * need the target directory gid to set the initial + * gid of the new object. + */ + VATTR_WANTED(vap, va_acl); + if (dvap) { + VATTR_WANTED(dvap, va_gid); + } + } else if (dvap && (flags & VNODE_CLONEFILE_NOOWNERCOPY)) { + VATTR_WANTED(dvap, va_gid); + } + return 0; + } else if (vattr_op == OP_VATTR_CLEANUP) { + return 0; /* Nothing to do for now */ + } + + /* dvap isn't used for authorization */ + error = vnode_attr_authorize(vap, NULL, mp, action, ctx); + + if (error) { + return error; + } + + /* + * vn_attribute_prepare should be able to accept attributes as well as + * vnodes but for now we do this inline. + */ + if (!is_suser || (flags & VNODE_CLONEFILE_NOOWNERCOPY)) { + /* + * If the filesystem is mounted IGNORE_OWNERSHIP and an explicit + * owner is set, that owner takes ownership of all new files. + */ + if ((mp->mnt_flag & MNT_IGNORE_OWNERSHIP) && + (mp->mnt_fsowner != KAUTH_UID_NONE)) { + VATTR_SET(vap, va_uid, mp->mnt_fsowner); + } else { + /* default owner is current user */ + VATTR_SET(vap, va_uid, + kauth_cred_getuid(vfs_context_ucred(ctx))); + } + + if ((mp->mnt_flag & MNT_IGNORE_OWNERSHIP) && + (mp->mnt_fsgroup != KAUTH_GID_NONE)) { + VATTR_SET(vap, va_gid, mp->mnt_fsgroup); + } else { + /* + * default group comes from parent object, + * fallback to current user + */ + if (VATTR_IS_SUPPORTED(dvap, va_gid)) { + VATTR_SET(vap, va_gid, dvap->va_gid); + } else { + VATTR_SET(vap, va_gid, + kauth_cred_getgid(vfs_context_ucred(ctx))); + } + } + } + + /* Inherit SF_RESTRICTED bit from destination directory only */ + if (VATTR_IS_ACTIVE(vap, va_flags)) { + VATTR_SET(vap, va_flags, + ((vap->va_flags & ~(UF_DATAVAULT | SF_RESTRICTED)))); /* Turn off from source */ + if (VATTR_IS_ACTIVE(dvap, va_flags)) { + VATTR_SET(vap, va_flags, + vap->va_flags | (dvap->va_flags & (UF_DATAVAULT | SF_RESTRICTED))); + } + } else if (VATTR_IS_ACTIVE(dvap, va_flags)) { + VATTR_SET(vap, va_flags, (dvap->va_flags & (UF_DATAVAULT | SF_RESTRICTED))); + } + + return 0; +} + + /* * Authorize an operation on a vnode. * @@ -5444,24 +7005,27 @@ vn_authorize_rmdir(vnode_t dvp, vnode_t vp, struct componentname *cnp, vfs_conte int vnode_authorize(vnode_t vp, vnode_t dvp, kauth_action_t action, vfs_context_t ctx) { - int error, result; + int error, result; /* * We can't authorize against a dead vnode; allow all operations through so that * the correct error can be returned. */ - if (vp->v_type == VBAD) - return(0); - + if (vp->v_type == VBAD) { + return 0; + } + error = 0; result = kauth_authorize_action(vnode_scope, vfs_context_ucred(ctx), action, - (uintptr_t)ctx, (uintptr_t)vp, (uintptr_t)dvp, (uintptr_t)&error); - if (result == EPERM) /* traditional behaviour */ + (uintptr_t)ctx, (uintptr_t)vp, (uintptr_t)dvp, (uintptr_t)&error); + if (result == EPERM) { /* traditional behaviour */ result = EACCES; + } /* did the lower layers give a better error return? */ - if ((result != 0) && (error != 0)) - return(error); - return(result); + if ((result != 0) && (error != 0)) { + return error; + } + return result; } /* @@ -5477,14 +7041,15 @@ vnode_authorize(vnode_t vp, vnode_t dvp, kauth_action_t action, vfs_context_t ct static int vnode_immutable(struct vnode_attr *vap, int append, int ignore) { - int mask; + int mask; /* start with all bits precluding the operation */ mask = IMMUTABLE | APPEND; /* if appending only, remove the append-only bits */ - if (append) + if (append) { mask &= ~APPEND; + } /* ignore only set when authorizing flags changes */ if (ignore) { @@ -5497,9 +7062,10 @@ vnode_immutable(struct vnode_attr *vap, int append, int ignore) } } KAUTH_DEBUG("IMMUTABLE - file flags 0x%x mask 0x%x append = %d ignore = %d", vap->va_flags, mask, append, ignore); - if ((vap->va_flags & mask) != 0) - return(EPERM); - return(0); + if ((vap->va_flags & mask) != 0) { + return EPERM; + } + return 0; } static int @@ -5517,8 +7083,8 @@ vauth_node_owner(struct vnode_attr *vap, kauth_cred_t cred) result = (vap->va_uid == kauth_cred_getuid(cred)) ? 1 : 0; } /* we could test the owner UUID here if we had a policy for it */ - - return(result); + + return result; } /* @@ -5540,8 +7106,8 @@ vauth_node_owner(struct vnode_attr *vap, kauth_cred_t cred) static int vauth_node_group(struct vnode_attr *vap, kauth_cred_t cred, int *ismember, int idontknow) { - int error; - int result; + int error; + int result; error = 0; result = 0; @@ -5568,8 +7134,9 @@ vauth_node_group(struct vnode_attr *vap, kauth_cred_t cred, int *ismember, int i * XXX all currently known cases, however, this wil result * XXX in correct behaviour. */ - if (error == ENOENT) + if (error == ENOENT) { error = idontknow; + } } /* * XXX We could test the group UUID here if we had a policy for it, @@ -5584,9 +7151,10 @@ vauth_node_group(struct vnode_attr *vap, kauth_cred_t cred, int *ismember, int i * XXX caching DNS server). */ - if (!error) + if (!error) { *ismember = result; - return(error); + } + return error; } static int @@ -5607,7 +7175,7 @@ vauth_file_owner(vauth_ctx vcp) vcp->flags &= ~_VAC_IS_OWNER; } } - return(result); + return result; } @@ -5634,7 +7202,7 @@ vauth_file_owner(vauth_ctx vcp) static int vauth_file_ingroup(vauth_ctx vcp, int *ismember, int idontknow) { - int error; + int error; /* Check for a cached answer first, to avoid the check if possible */ if (vcp->flags_valid & _VAC_IN_GROUP) { @@ -5653,9 +7221,8 @@ vauth_file_ingroup(vauth_ctx vcp, int *ismember, int idontknow) vcp->flags &= ~_VAC_IN_GROUP; } } - } - return(error); + return error; } static int @@ -5676,7 +7243,7 @@ vauth_dir_owner(vauth_ctx vcp) vcp->flags &= ~_VAC_IS_DIR_OWNER; } } - return(result); + return result; } /* @@ -5702,7 +7269,7 @@ vauth_dir_owner(vauth_ctx vcp) static int vauth_dir_ingroup(vauth_ctx vcp, int *ismember, int idontknow) { - int error; + int error; /* Check for a cached answer first, to avoid the check if possible */ if (vcp->flags_valid & _VAC_IN_DIR_GROUP) { @@ -5722,7 +7289,7 @@ vauth_dir_ingroup(vauth_ctx vcp, int *ismember, int idontknow) } } } - return(error); + return error; } /* @@ -5736,7 +7303,7 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) int needed, error, owner_ok, group_ok, world_ok, ismember; #ifdef KAUTH_DEBUG_ENABLE const char *where = "uninitialized"; -# define _SETWHERE(c) where = c; +# define _SETWHERE(c) where = c; #else # define _SETWHERE(c) #endif @@ -5747,9 +7314,9 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) } else { vap = vcp->vap; } - + error = 0; - + /* * We want to do as little work here as possible. So first we check * which sets of permissions grant us the access we need, and avoid checking @@ -5758,32 +7325,41 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) /* owner permissions */ needed = 0; - if (action & VREAD) + if (action & VREAD) { needed |= S_IRUSR; - if (action & VWRITE) + } + if (action & VWRITE) { needed |= S_IWUSR; - if (action & VEXEC) + } + if (action & VEXEC) { needed |= S_IXUSR; + } owner_ok = (needed & vap->va_mode) == needed; /* group permissions */ needed = 0; - if (action & VREAD) + if (action & VREAD) { needed |= S_IRGRP; - if (action & VWRITE) + } + if (action & VWRITE) { needed |= S_IWGRP; - if (action & VEXEC) + } + if (action & VEXEC) { needed |= S_IXGRP; + } group_ok = (needed & vap->va_mode) == needed; /* world permissions */ needed = 0; - if (action & VREAD) + if (action & VREAD) { needed |= S_IROTH; - if (action & VWRITE) + } + if (action & VWRITE) { needed |= S_IWOTH; - if (action & VEXEC) + } + if (action & VEXEC) { needed |= S_IXOTH; + } world_ok = (needed & vap->va_mode) == needed; /* If granted/denied by all three, we're done */ @@ -5801,8 +7377,9 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) if ((on_dir && vauth_dir_owner(vcp)) || (!on_dir && vauth_file_owner(vcp))) { _SETWHERE("user"); - if (!owner_ok) + if (!owner_ok) { error = EACCES; + } goto out; } @@ -5818,7 +7395,7 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) } /* Check group membership (most expensive) */ - ismember = 0; /* Default to allow, if the target has no group owner */ + ismember = 0; /* Default to allow, if the target has no group owner */ /* * In the case we can't get an answer about the user from the call to @@ -5833,21 +7410,24 @@ vnode_authorize_posix(vauth_ctx vcp, int action, int on_dir) error = vauth_file_ingroup(vcp, &ismember, (!group_ok ? EACCES : 0)); } if (error) { - if (!group_ok) + if (!group_ok) { ismember = 1; + } error = 0; } if (ismember) { _SETWHERE("group"); - if (!group_ok) + if (!group_ok) { error = EACCES; + } goto out; } /* Not owner, not in group, use world result */ _SETWHERE("world"); - if (!world_ok) + if (!world_ok) { error = EACCES; + } /* FALLTHROUGH */ @@ -5870,7 +7450,7 @@ out: kauth_cred_getuid(vcp->ctx->vc_ucred), on_dir ? vcp->dvap->va_uid : vcp->vap->va_uid, on_dir ? vcp->dvap->va_gid : vcp->vap->va_gid); - return(error); + return error; } /* @@ -5880,149 +7460,191 @@ out: * - Neither the node nor the directory are immutable. * - The user is not the superuser. * - * Deletion is not permitted if the directory is sticky and the caller is - * not owner of the node or directory. + * The precedence of factors for authorizing or denying delete for a credential + * + * 1) Explicit ACE on the node. (allow or deny DELETE) + * 2) Explicit ACE on the directory (allow or deny DELETE_CHILD). + * + * If there are conflicting ACEs on the node and the directory, the node + * ACE wins. * - * If either the node grants DELETE, or the directory grants DELETE_CHILD, - * the node may be deleted. If neither denies the permission, and the - * caller has Posix write access to the directory, then the node may be - * deleted. + * 3) Sticky bit on the directory. + * Deletion is not permitted if the directory is sticky and the caller is + * not owner of the node or directory. The sticky bit rules are like a deny + * delete ACE except lower in priority than ACL's either allowing or denying + * delete. + * + * 4) POSIX permisions on the directory. * * As an optimization, we cache whether or not delete child is permitted - * on directories without the sticky bit set. + * on directories. This enables us to skip directory ACL and POSIX checks + * as we already have the result from those checks. However, we always check the + * node ACL and, if the directory has the sticky bit set, we always check its + * ACL (even for a directory with an authorized delete child). Furthermore, + * caching the delete child authorization is independent of the sticky bit + * being set as it is only applicable in determining whether the node can be + * deleted or not. */ -int -vnode_authorize_delete(vauth_ctx vcp, boolean_t cached_delete_child); -/*static*/ int +static int vnode_authorize_delete(vauth_ctx vcp, boolean_t cached_delete_child) { - struct vnode_attr *vap = vcp->vap; - struct vnode_attr *dvap = vcp->dvap; - kauth_cred_t cred = vcp->ctx->vc_ucred; - struct kauth_acl_eval eval; - int error, delete_denied, delete_child_denied, ismember; + struct vnode_attr *vap = vcp->vap; + struct vnode_attr *dvap = vcp->dvap; + kauth_cred_t cred = vcp->ctx->vc_ucred; + struct kauth_acl_eval eval; + int error, ismember; - /* check the ACL on the directory */ - delete_child_denied = 0; - if (!cached_delete_child && VATTR_IS_NOT(dvap, va_acl, NULL)) { - eval.ae_requested = KAUTH_VNODE_DELETE_CHILD; - eval.ae_acl = &dvap->va_acl->acl_ace[0]; - eval.ae_count = dvap->va_acl->acl_entrycount; + /* Check the ACL on the node first */ + if (VATTR_IS_NOT(vap, va_acl, NULL)) { + eval.ae_requested = KAUTH_VNODE_DELETE; + eval.ae_acl = &vap->va_acl->acl_ace[0]; + eval.ae_count = vap->va_acl->acl_entrycount; eval.ae_options = 0; - if (vauth_dir_owner(vcp)) + if (vauth_file_owner(vcp)) { eval.ae_options |= KAUTH_AEVAL_IS_OWNER; + } /* * We use ENOENT as a marker to indicate we could not get * information in order to delay evaluation until after we * have the ACL evaluation answer. Previously, we would * always deny the operation at this point. */ - if ((error = vauth_dir_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) - return(error); - if (error == ENOENT) + if ((error = vauth_file_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) { + return error; + } + if (error == ENOENT) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP_UNKNOWN; - else if (ismember) + } else if (ismember) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP; + } eval.ae_exp_gall = KAUTH_VNODE_GENERIC_ALL_BITS; eval.ae_exp_gread = KAUTH_VNODE_GENERIC_READ_BITS; eval.ae_exp_gwrite = KAUTH_VNODE_GENERIC_WRITE_BITS; eval.ae_exp_gexec = KAUTH_VNODE_GENERIC_EXECUTE_BITS; - /* - * If there is no entry, we are going to defer to other - * authorization mechanisms. - */ - error = kauth_acl_evaluate(cred, &eval); - - if (error != 0) { + if ((error = kauth_acl_evaluate(cred, &eval)) != 0) { KAUTH_DEBUG("%p ERROR during ACL processing - %d", vcp->vp, error); - return(error); + return error; } - switch(eval.ae_result) { + + switch (eval.ae_result) { case KAUTH_RESULT_DENY: - delete_child_denied = 1; - break; - /* FALLSTHROUGH */ - case KAUTH_RESULT_ALLOW: - KAUTH_DEBUG("%p ALLOWED - granted by directory ACL", vcp->vp); - return(0); + KAUTH_DEBUG("%p DENIED - denied by ACL", vcp->vp); + return EACCES; + case KAUTH_RESULT_ALLOW: + KAUTH_DEBUG("%p ALLOWED - granted by ACL", vcp->vp); + return 0; case KAUTH_RESULT_DEFER: default: - /* Effectively the same as !delete_child_denied */ - KAUTH_DEBUG("%p DEFERRED - directory ACL", vcp->vp); + /* Defer to directory */ + KAUTH_DEBUG("%p DEFERRED - by file ACL", vcp->vp); break; } } - /* check the ACL on the node */ - delete_denied = 0; - if (VATTR_IS_NOT(vap, va_acl, NULL)) { - eval.ae_requested = KAUTH_VNODE_DELETE; - eval.ae_acl = &vap->va_acl->acl_ace[0]; - eval.ae_count = vap->va_acl->acl_entrycount; + /* + * Without a sticky bit, a previously authorized delete child is + * sufficient to authorize this delete. + * + * If the sticky bit is set, a directory ACL which allows delete child + * overrides a (potential) sticky bit deny. The authorized delete child + * cannot tell us if it was authorized because of an explicit delete + * child allow ACE or because of POSIX permisions so we have to check + * the directory ACL everytime if the directory has a sticky bit. + */ + if (!(dvap->va_mode & S_ISTXT) && cached_delete_child) { + KAUTH_DEBUG("%p ALLOWED - granted by directory ACL or POSIX permissions and no sticky bit on directory", vcp->vp); + return 0; + } + + /* check the ACL on the directory */ + if (VATTR_IS_NOT(dvap, va_acl, NULL)) { + eval.ae_requested = KAUTH_VNODE_DELETE_CHILD; + eval.ae_acl = &dvap->va_acl->acl_ace[0]; + eval.ae_count = dvap->va_acl->acl_entrycount; eval.ae_options = 0; - if (vauth_file_owner(vcp)) + if (vauth_dir_owner(vcp)) { eval.ae_options |= KAUTH_AEVAL_IS_OWNER; + } /* * We use ENOENT as a marker to indicate we could not get * information in order to delay evaluation until after we * have the ACL evaluation answer. Previously, we would * always deny the operation at this point. */ - if ((error = vauth_file_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) - return(error); - if (error == ENOENT) + if ((error = vauth_dir_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) { + return error; + } + if (error == ENOENT) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP_UNKNOWN; - else if (ismember) + } else if (ismember) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP; + } eval.ae_exp_gall = KAUTH_VNODE_GENERIC_ALL_BITS; eval.ae_exp_gread = KAUTH_VNODE_GENERIC_READ_BITS; eval.ae_exp_gwrite = KAUTH_VNODE_GENERIC_WRITE_BITS; eval.ae_exp_gexec = KAUTH_VNODE_GENERIC_EXECUTE_BITS; - if ((error = kauth_acl_evaluate(cred, &eval)) != 0) { + /* + * If there is no entry, we are going to defer to other + * authorization mechanisms. + */ + error = kauth_acl_evaluate(cred, &eval); + + if (error != 0) { KAUTH_DEBUG("%p ERROR during ACL processing - %d", vcp->vp, error); - return(error); + return error; } - - switch(eval.ae_result) { + switch (eval.ae_result) { case KAUTH_RESULT_DENY: - delete_denied = 1; - break; + KAUTH_DEBUG("%p DENIED - denied by directory ACL", vcp->vp); + return EACCES; case KAUTH_RESULT_ALLOW: - KAUTH_DEBUG("%p ALLOWED - granted by file ACL", vcp->vp); - return(0); + KAUTH_DEBUG("%p ALLOWED - granted by directory ACL", vcp->vp); + if (!cached_delete_child && vcp->dvp) { + vnode_cache_authorized_action(vcp->dvp, + vcp->ctx, KAUTH_VNODE_DELETE_CHILD); + } + return 0; case KAUTH_RESULT_DEFER: default: - /* Effectively the same as !delete_child_denied */ - KAUTH_DEBUG("%p DEFERRED%s - by file ACL", vcp->vp, delete_denied ? "(DENY)" : ""); + /* Deferred by directory ACL */ + KAUTH_DEBUG("%p DEFERRED - directory ACL", vcp->vp); break; } } - /* if denied by ACL on directory or node, return denial */ - if (delete_denied || delete_child_denied) { - KAUTH_DEBUG("%p DENIED - denied by ACL", vcp->vp); - return(EACCES); + /* + * From this point, we can't explicitly allow and if we reach the end + * of the function without a denial, then the delete is authorized. + */ + if (!cached_delete_child) { + if (vnode_authorize_posix(vcp, VWRITE, 1 /* on_dir */) != 0) { + KAUTH_DEBUG("%p DENIED - denied by posix permisssions", vcp->vp); + return EACCES; + } + /* + * Cache the authorized action on the vnode if allowed by the + * directory ACL or POSIX permissions. It is correct to cache + * this action even if sticky bit would deny deleting the node. + */ + if (vcp->dvp) { + vnode_cache_authorized_action(vcp->dvp, vcp->ctx, + KAUTH_VNODE_DELETE_CHILD); + } } /* enforce sticky bit behaviour */ if ((dvap->va_mode & S_ISTXT) && !vauth_file_owner(vcp) && !vauth_dir_owner(vcp)) { KAUTH_DEBUG("%p DENIED - sticky bit rules (user %d file %d dir %d)", vcp->vp, cred->cr_posix.cr_uid, vap->va_uid, dvap->va_uid); - return(EACCES); - } - - /* check the directory */ - if (!cached_delete_child && (error = vnode_authorize_posix(vcp, VWRITE, 1 /* on_dir */)) != 0) { - KAUTH_DEBUG("%p DENIED - denied by posix permisssions", vcp->vp); - return(error); + return EACCES; } /* not denied, must be OK */ - return(0); + return 0; } - + /* * Authorize an operation based on the node's attributes. @@ -6030,19 +7652,20 @@ vnode_authorize_delete(vauth_ctx vcp, boolean_t cached_delete_child) static int vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_rights_t preauth_rights, boolean_t *found_deny) { - struct vnode_attr *vap = vcp->vap; - kauth_cred_t cred = vcp->ctx->vc_ucred; - struct kauth_acl_eval eval; - int error, ismember; - mode_t posix_action; + struct vnode_attr *vap = vcp->vap; + kauth_cred_t cred = vcp->ctx->vc_ucred; + struct kauth_acl_eval eval; + int error, ismember; + mode_t posix_action; /* * If we are the file owner, we automatically have some rights. * * Do we need to expand this to support group ownership? */ - if (vauth_file_owner(vcp)) + if (vauth_file_owner(vcp)) { acl_rights &= ~(KAUTH_VNODE_WRITE_SECURITY); + } /* * If we are checking both TAKE_OWNERSHIP and WRITE_SECURITY, we can @@ -6053,12 +7676,13 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r * the owner. */ if ((acl_rights & KAUTH_VNODE_TAKE_OWNERSHIP) && - (acl_rights & KAUTH_VNODE_WRITE_SECURITY)) + (acl_rights & KAUTH_VNODE_WRITE_SECURITY)) { acl_rights &= ~KAUTH_VNODE_WRITE_SECURITY; - + } + if (acl_rights == 0) { KAUTH_DEBUG("%p ALLOWED - implicit or no rights required", vcp->vp); - return(0); + return 0; } /* if we have an ACL, evaluate it */ @@ -6067,37 +7691,40 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r eval.ae_acl = &vap->va_acl->acl_ace[0]; eval.ae_count = vap->va_acl->acl_entrycount; eval.ae_options = 0; - if (vauth_file_owner(vcp)) + if (vauth_file_owner(vcp)) { eval.ae_options |= KAUTH_AEVAL_IS_OWNER; + } /* * We use ENOENT as a marker to indicate we could not get * information in order to delay evaluation until after we * have the ACL evaluation answer. Previously, we would * always deny the operation at this point. */ - if ((error = vauth_file_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) - return(error); - if (error == ENOENT) + if ((error = vauth_file_ingroup(vcp, &ismember, ENOENT)) != 0 && error != ENOENT) { + return error; + } + if (error == ENOENT) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP_UNKNOWN; - else if (ismember) + } else if (ismember) { eval.ae_options |= KAUTH_AEVAL_IN_GROUP; + } eval.ae_exp_gall = KAUTH_VNODE_GENERIC_ALL_BITS; eval.ae_exp_gread = KAUTH_VNODE_GENERIC_READ_BITS; eval.ae_exp_gwrite = KAUTH_VNODE_GENERIC_WRITE_BITS; eval.ae_exp_gexec = KAUTH_VNODE_GENERIC_EXECUTE_BITS; - + if ((error = kauth_acl_evaluate(cred, &eval)) != 0) { KAUTH_DEBUG("%p ERROR during ACL processing - %d", vcp->vp, error); - return(error); + return error; } - - switch(eval.ae_result) { + + switch (eval.ae_result) { case KAUTH_RESULT_DENY: KAUTH_DEBUG("%p DENIED - by ACL", vcp->vp); - return(EACCES); /* deny, deny, counter-allege */ + return EACCES; /* deny, deny, counter-allege */ case KAUTH_RESULT_ALLOW: KAUTH_DEBUG("%p ALLOWED - all rights granted by ACL", vcp->vp); - return(0); + return 0; case KAUTH_RESULT_DEFER: default: /* Effectively the same as !delete_child_denied */ @@ -6121,14 +7748,15 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r /* * We grant WRITE_ATTRIBUTES to the owner if it hasn't been denied. */ - if (vauth_file_owner(vcp)) + if (vauth_file_owner(vcp)) { eval.ae_residual &= ~KAUTH_VNODE_WRITE_ATTRIBUTES; - + } + if (eval.ae_residual == 0) { KAUTH_DEBUG("%p ALLOWED - rights already authorized", vcp->vp); - return(0); - } - + return 0; + } + /* * Bail if we have residual rights that can't be granted by posix permissions, * or aren't presumed granted at this point. @@ -6137,16 +7765,17 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r */ if (eval.ae_residual & KAUTH_VNODE_CHANGE_OWNER) { KAUTH_DEBUG("%p DENIED - CHANGE_OWNER not permitted", vcp->vp); - return(EACCES); + return EACCES; } if (eval.ae_residual & KAUTH_VNODE_WRITE_SECURITY) { KAUTH_DEBUG("%p DENIED - WRITE_SECURITY not permitted", vcp->vp); - return(EACCES); + return EACCES; } #if DIAGNOSTIC - if (eval.ae_residual & KAUTH_VNODE_DELETE) + if (eval.ae_residual & KAUTH_VNODE_DELETE) { panic("vnode_authorize: can't be checking delete permission here"); + } #endif /* @@ -6155,22 +7784,25 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r */ posix_action = 0; if (eval.ae_residual & (KAUTH_VNODE_READ_DATA | - KAUTH_VNODE_LIST_DIRECTORY | - KAUTH_VNODE_READ_EXTATTRIBUTES)) + KAUTH_VNODE_LIST_DIRECTORY | + KAUTH_VNODE_READ_EXTATTRIBUTES)) { posix_action |= VREAD; + } if (eval.ae_residual & (KAUTH_VNODE_WRITE_DATA | - KAUTH_VNODE_ADD_FILE | - KAUTH_VNODE_ADD_SUBDIRECTORY | - KAUTH_VNODE_DELETE_CHILD | - KAUTH_VNODE_WRITE_ATTRIBUTES | - KAUTH_VNODE_WRITE_EXTATTRIBUTES)) + KAUTH_VNODE_ADD_FILE | + KAUTH_VNODE_ADD_SUBDIRECTORY | + KAUTH_VNODE_DELETE_CHILD | + KAUTH_VNODE_WRITE_ATTRIBUTES | + KAUTH_VNODE_WRITE_EXTATTRIBUTES)) { posix_action |= VWRITE; + } if (eval.ae_residual & (KAUTH_VNODE_EXECUTE | - KAUTH_VNODE_SEARCH)) + KAUTH_VNODE_SEARCH)) { posix_action |= VEXEC; - + } + if (posix_action != 0) { - return(vnode_authorize_posix(vcp, posix_action, 0 /* !on_dir */)); + return vnode_authorize_posix(vcp, posix_action, 0 /* !on_dir */); } else { KAUTH_DEBUG("%p ALLOWED - residual rights %s%s%s%s%s%s%s%s%s%s%s%s%s%s granted due to no posix mapping", vcp->vp, @@ -6207,16 +7839,15 @@ vnode_authorize_simple(vauth_ctx vcp, kauth_ace_rights_t acl_rights, kauth_ace_r /* * Lack of required Posix permissions implies no reason to deny access. */ - return(0); + return 0; } /* * Check for file immutability. */ static int -vnode_authorize_checkimmutable(vnode_t vp, struct vnode_attr *vap, int rights, int ignore) +vnode_authorize_checkimmutable(mount_t mp, struct vnode_attr *vap, int rights, int ignore) { - mount_t mp; int error; int append; @@ -6225,7 +7856,7 @@ vnode_authorize_checkimmutable(vnode_t vp, struct vnode_attr *vap, int rights, i * * Sockets, fifos and devices require special handling. */ - switch(vp->v_type) { + switch (vap->va_type) { case VSOCK: case VFIFO: case VBLK: @@ -6242,39 +7873,38 @@ vnode_authorize_checkimmutable(vnode_t vp, struct vnode_attr *vap, int rights, i error = 0; if (rights & KAUTH_VNODE_WRITE_RIGHTS) { - /* check per-filesystem options if possible */ - mp = vp->v_mount; if (mp != NULL) { - /* check for no-EA filesystems */ if ((rights & KAUTH_VNODE_WRITE_EXTATTRIBUTES) && (vfs_flags(mp) & MNT_NOUSERXATTR)) { - KAUTH_DEBUG("%p DENIED - filesystem disallowed extended attributes", vp); + KAUTH_DEBUG("%p DENIED - filesystem disallowed extended attributes", vap); error = EACCES; /* User attributes disabled */ goto out; } } - /* - * check for file immutability. first, check if the requested rights are + /* + * check for file immutability. first, check if the requested rights are * allowable for a UF_APPEND file. */ append = 0; - if (vp->v_type == VDIR) { - if ((rights & (KAUTH_VNODE_ADD_FILE | KAUTH_VNODE_ADD_SUBDIRECTORY | KAUTH_VNODE_WRITE_EXTATTRIBUTES)) == rights) + if (vap->va_type == VDIR) { + if ((rights & (KAUTH_VNODE_ADD_FILE | KAUTH_VNODE_ADD_SUBDIRECTORY | KAUTH_VNODE_WRITE_EXTATTRIBUTES)) == rights) { append = 1; + } } else { - if ((rights & (KAUTH_VNODE_APPEND_DATA | KAUTH_VNODE_WRITE_EXTATTRIBUTES)) == rights) + if ((rights & (KAUTH_VNODE_APPEND_DATA | KAUTH_VNODE_WRITE_EXTATTRIBUTES)) == rights) { append = 1; + } } if ((error = vnode_immutable(vap, append, ignore)) != 0) { - KAUTH_DEBUG("%p DENIED - file is immutable", vp); + KAUTH_DEBUG("%p DENIED - file is immutable", vap); goto out; } } out: - return(error); + return error; } /* @@ -6295,18 +7925,18 @@ out: static int vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_context_t ctx) { - int error; + int error; /* * If the vp is a device node, socket or FIFO it actually represents a local * endpoint, so we need to handle it locally. */ - switch(vp->v_type) { + switch (vp->v_type) { case VBLK: case VCHR: case VSOCK: case VFIFO: - return(0); + return 0; default: break; } @@ -6315,8 +7945,9 @@ vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_cont * In the advisory request case, if the filesystem doesn't think it's reliable * we will attempt to formulate a result ourselves based on VNOP_GETATTR data. */ - if ((action & KAUTH_VNODE_ACCESS) && !vfs_authopaqueaccess(vp->v_mount)) - return(0); + if ((action & KAUTH_VNODE_ACCESS) && !vfs_authopaqueaccess(vp->v_mount)) { + return 0; + } /* * Let the filesystem have a say in the matter. It's OK for it to not implemnent @@ -6325,9 +7956,9 @@ vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_cont if ((error = VNOP_ACCESS(vp, action, ctx)) != ENOTSUP) { *resultp = error; KAUTH_DEBUG("%p DENIED - opaque filesystem VNOP_ACCESS denied access", vp); - return(1); + return 1; } - + /* * Typically opaque filesystems do authorisation in-line, but exec is a special case. In * order to be reasonably sure that exec will be permitted, we try a bit harder here. @@ -6337,7 +7968,7 @@ vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_cont if ((error = VNOP_OPEN(vp, FREAD, ctx)) != 0) { *resultp = error; KAUTH_DEBUG("%p DENIED - EXECUTE denied because file could not be opened readonly", vp); - return(1); + return 1; } VNOP_CLOSE(vp, FREAD, ctx); } @@ -6348,7 +7979,7 @@ vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_cont */ *resultp = 0; KAUTH_DEBUG("%p ALLOWED - bypassing access check for non-local filesystem", vp); - return(1); + return 1; } @@ -6372,15 +8003,16 @@ vnode_authorize_opaque(vnode_t vp, int *resultp, kauth_action_t action, vfs_cont static int -vnode_authorize_callback(kauth_cred_t cred, void *idata, kauth_action_t action, - uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3) +vnode_authorize_callback(__unused kauth_cred_t cred, __unused void *idata, + kauth_action_t action, uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, + uintptr_t arg3) { - vfs_context_t ctx; - vnode_t cvp = NULLVP; - vnode_t vp, dvp; - int result = KAUTH_RESULT_DENY; - int parent_iocount = 0; - int parent_action; /* In case we need to use namedstream's data fork for cached rights*/ + vfs_context_t ctx; + vnode_t cvp = NULLVP; + vnode_t vp, dvp; + int result = KAUTH_RESULT_DENY; + int parent_iocount = 0; + int parent_action; /* In case we need to use namedstream's data fork for cached rights*/ ctx = (vfs_context_t)arg0; vp = (vnode_t)arg1; @@ -6388,7 +8020,7 @@ vnode_authorize_callback(kauth_cred_t cred, void *idata, kauth_action_t action, /* * if there are 2 vnodes passed in, we don't know at - * this point which rights to look at based on the + * this point which rights to look at based on the * combined action being passed in... defer until later... * otherwise check the kauth 'rights' cache hung * off of the vnode we're interested in... if we've already @@ -6398,25 +8030,26 @@ vnode_authorize_callback(kauth_cred_t cred, void *idata, kauth_action_t action, * succeeds, we'll add the right(s) to the cache. * VNOP_SETATTR and VNOP_SETXATTR will invalidate this cache */ - if (dvp && vp) - goto defer; + if (dvp && vp) { + goto defer; + } if (dvp) { - cvp = dvp; + cvp = dvp; } else { - /* + /* * For named streams on local-authorization volumes, rights are cached on the parent; * authorization is determined by looking at the parent's properties anyway, so storing - * on the parent means that we don't recompute for the named stream and that if + * on the parent means that we don't recompute for the named stream and that if * we need to flush rights (e.g. on VNOP_SETATTR()) we don't need to track down the * stream to flush its cache separately. If we miss in the cache, then we authorize - * as if there were no cached rights (passing the named stream vnode and desired rights to + * as if there were no cached rights (passing the named stream vnode and desired rights to * vnode_authorize_callback_int()). * - * On an opaquely authorized volume, we don't know the relationship between the + * On an opaquely authorized volume, we don't know the relationship between the * data fork's properties and the rights granted on a stream. Thus, named stream vnodes * on such a volume are authorized directly (rather than using the parent) and have their * own caches. When a named stream vnode is created, we mark the parent as having a named - * stream. On a VNOP_SETATTR() for the parent that may invalidate cached authorization, we + * stream. On a VNOP_SETATTR() for the parent that may invalidate cached authorization, we * find the stream and flush its cache. */ if (vnode_isnamedstream(vp) && (!vfs_authopaque(vp->v_mount))) { @@ -6438,56 +8071,127 @@ vnode_authorize_callback(kauth_cred_t cred, void *idata, kauth_action_t action, parent_action &= ~KAUTH_VNODE_WRITE_DATA; parent_action |= KAUTH_VNODE_WRITE_EXTATTRIBUTES; } + } else { + cvp = vp; + } + } + + if (vnode_cache_is_authorized(cvp, ctx, parent_iocount ? parent_action : action) == TRUE) { + result = KAUTH_RESULT_ALLOW; + goto out; + } +defer: + result = vnode_authorize_callback_int(action, ctx, vp, dvp, (int *)arg3); + + if (result == KAUTH_RESULT_ALLOW && cvp != NULLVP) { + KAUTH_DEBUG("%p - caching action = %x", cvp, action); + vnode_cache_authorized_action(cvp, ctx, action); + } + +out: + if (parent_iocount) { + vnode_put(cvp); + } + + return result; +} + +static int +vnode_attr_authorize_internal(vauth_ctx vcp, mount_t mp, + kauth_ace_rights_t rights, int is_suser, boolean_t *found_deny, + int noimmutable, int parent_authorized_for_delete_child) +{ + int result; + + /* + * Check for immutability. + * + * In the deletion case, parent directory immutability vetoes specific + * file rights. + */ + if ((result = vnode_authorize_checkimmutable(mp, vcp->vap, rights, + noimmutable)) != 0) { + goto out; + } - } else { - cvp = vp; + if ((rights & KAUTH_VNODE_DELETE) && + !parent_authorized_for_delete_child) { + result = vnode_authorize_checkimmutable(mp, vcp->dvap, + KAUTH_VNODE_DELETE_CHILD, 0); + if (result) { + goto out; } } - if (vnode_cache_is_authorized(cvp, ctx, parent_iocount ? parent_action : action) == TRUE) { - result = KAUTH_RESULT_ALLOW; + /* + * Clear rights that have been authorized by reaching this point, bail if nothing left to + * check. + */ + rights &= ~(KAUTH_VNODE_LINKTARGET | KAUTH_VNODE_CHECKIMMUTABLE); + if (rights == 0) { goto out; } -defer: - result = vnode_authorize_callback_int(cred, idata, action, arg0, arg1, arg2, arg3); - if (result == KAUTH_RESULT_ALLOW && cvp != NULLVP) { - KAUTH_DEBUG("%p - caching action = %x", cvp, action); - vnode_cache_authorized_action(cvp, ctx, action); - } + /* + * If we're not the superuser, authorize based on file properties; + * note that even if parent_authorized_for_delete_child is TRUE, we + * need to check on the node itself. + */ + if (!is_suser) { + /* process delete rights */ + if ((rights & KAUTH_VNODE_DELETE) && + ((result = vnode_authorize_delete(vcp, parent_authorized_for_delete_child)) != 0)) { + goto out; + } -out: - if (parent_iocount) { - vnode_put(cvp); - } + /* process remaining rights */ + if ((rights & ~KAUTH_VNODE_DELETE) && + (result = vnode_authorize_simple(vcp, rights, rights & KAUTH_VNODE_DELETE, found_deny)) != 0) { + goto out; + } + } else { + /* + * Execute is only granted to root if one of the x bits is set. This check only + * makes sense if the posix mode bits are actually supported. + */ + if ((rights & KAUTH_VNODE_EXECUTE) && + (vcp->vap->va_type == VREG) && + VATTR_IS_SUPPORTED(vcp->vap, va_mode) && + !(vcp->vap->va_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) { + result = EPERM; + KAUTH_DEBUG("%p DENIED - root execute requires at least one x bit in 0x%x", vcp, vcp->vap->va_mode); + goto out; + } + /* Assume that there were DENYs so we don't wrongly cache KAUTH_VNODE_SEARCHBYANYONE */ + *found_deny = TRUE; + + KAUTH_DEBUG("%p ALLOWED - caller is superuser", vcp); + } +out: return result; } - static int -vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *idata, kauth_action_t action, - uintptr_t arg0, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3) +vnode_authorize_callback_int(kauth_action_t action, vfs_context_t ctx, + vnode_t vp, vnode_t dvp, int *errorp) { struct _vnode_authorize_context auth_context; - vauth_ctx vcp; - vfs_context_t ctx; - vnode_t vp, dvp; - kauth_cred_t cred; - kauth_ace_rights_t rights; - struct vnode_attr va, dva; - int result; - int *errorp; - int noimmutable; - boolean_t parent_authorized_for_delete_child = FALSE; - boolean_t found_deny = FALSE; - boolean_t parent_ref= FALSE; + vauth_ctx vcp; + kauth_cred_t cred; + kauth_ace_rights_t rights; + struct vnode_attr va, dva; + int result; + int noimmutable; + boolean_t parent_authorized_for_delete_child = FALSE; + boolean_t found_deny = FALSE; + boolean_t parent_ref = FALSE; + boolean_t is_suser = FALSE; vcp = &auth_context; - ctx = vcp->ctx = (vfs_context_t)arg0; - vp = vcp->vp = (vnode_t)arg1; - dvp = vcp->dvp = (vnode_t)arg2; - errorp = (int *)arg3; + vcp->ctx = ctx; + vcp->vp = vp; + vcp->dvp = dvp; /* * Note that we authorize against the context, not the passed cred * (the same thing anyway) @@ -6502,27 +8206,28 @@ vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *i vcp->flags = vcp->flags_valid = 0; #if DIAGNOSTIC - if ((ctx == NULL) || (vp == NULL) || (cred == NULL)) + if ((ctx == NULL) || (vp == NULL) || (cred == NULL)) { panic("vnode_authorize: bad arguments (context %p vp %p cred %p)", ctx, vp, cred); + } #endif KAUTH_DEBUG("%p AUTH - %s %s%s%s%s%s%s%s%s%s%s%s%s%s%s%s on %s '%s' (0x%x:%p/%p)", vp, vfs_context_proc(ctx)->p_comm, - (action & KAUTH_VNODE_ACCESS) ? "access" : "auth", - (action & KAUTH_VNODE_READ_DATA) ? vnode_isdir(vp) ? " LIST_DIRECTORY" : " READ_DATA" : "", - (action & KAUTH_VNODE_WRITE_DATA) ? vnode_isdir(vp) ? " ADD_FILE" : " WRITE_DATA" : "", - (action & KAUTH_VNODE_EXECUTE) ? vnode_isdir(vp) ? " SEARCH" : " EXECUTE" : "", - (action & KAUTH_VNODE_DELETE) ? " DELETE" : "", - (action & KAUTH_VNODE_APPEND_DATA) ? vnode_isdir(vp) ? " ADD_SUBDIRECTORY" : " APPEND_DATA" : "", - (action & KAUTH_VNODE_DELETE_CHILD) ? " DELETE_CHILD" : "", - (action & KAUTH_VNODE_READ_ATTRIBUTES) ? " READ_ATTRIBUTES" : "", - (action & KAUTH_VNODE_WRITE_ATTRIBUTES) ? " WRITE_ATTRIBUTES" : "", - (action & KAUTH_VNODE_READ_EXTATTRIBUTES) ? " READ_EXTATTRIBUTES" : "", - (action & KAUTH_VNODE_WRITE_EXTATTRIBUTES) ? " WRITE_EXTATTRIBUTES" : "", - (action & KAUTH_VNODE_READ_SECURITY) ? " READ_SECURITY" : "", - (action & KAUTH_VNODE_WRITE_SECURITY) ? " WRITE_SECURITY" : "", - (action & KAUTH_VNODE_CHANGE_OWNER) ? " CHANGE_OWNER" : "", - (action & KAUTH_VNODE_NOIMMUTABLE) ? " (noimmutable)" : "", + (action & KAUTH_VNODE_ACCESS) ? "access" : "auth", + (action & KAUTH_VNODE_READ_DATA) ? vnode_isdir(vp) ? " LIST_DIRECTORY" : " READ_DATA" : "", + (action & KAUTH_VNODE_WRITE_DATA) ? vnode_isdir(vp) ? " ADD_FILE" : " WRITE_DATA" : "", + (action & KAUTH_VNODE_EXECUTE) ? vnode_isdir(vp) ? " SEARCH" : " EXECUTE" : "", + (action & KAUTH_VNODE_DELETE) ? " DELETE" : "", + (action & KAUTH_VNODE_APPEND_DATA) ? vnode_isdir(vp) ? " ADD_SUBDIRECTORY" : " APPEND_DATA" : "", + (action & KAUTH_VNODE_DELETE_CHILD) ? " DELETE_CHILD" : "", + (action & KAUTH_VNODE_READ_ATTRIBUTES) ? " READ_ATTRIBUTES" : "", + (action & KAUTH_VNODE_WRITE_ATTRIBUTES) ? " WRITE_ATTRIBUTES" : "", + (action & KAUTH_VNODE_READ_EXTATTRIBUTES) ? " READ_EXTATTRIBUTES" : "", + (action & KAUTH_VNODE_WRITE_EXTATTRIBUTES) ? " WRITE_EXTATTRIBUTES" : "", + (action & KAUTH_VNODE_READ_SECURITY) ? " READ_SECURITY" : "", + (action & KAUTH_VNODE_WRITE_SECURITY) ? " WRITE_SECURITY" : "", + (action & KAUTH_VNODE_CHANGE_OWNER) ? " CHANGE_OWNER" : "", + (action & KAUTH_VNODE_NOIMMUTABLE) ? " (noimmutable)" : "", vnode_isdir(vp) ? "directory" : "file", vp->v_name ? vp->v_name : "", action, vp, dvp); @@ -6532,11 +8237,12 @@ vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *i */ noimmutable = (action & KAUTH_VNODE_NOIMMUTABLE) ? 1 : 0; rights = action & ~(KAUTH_VNODE_ACCESS | KAUTH_VNODE_NOIMMUTABLE); - + if (rights & KAUTH_VNODE_DELETE) { #if DIAGNOSTIC - if (dvp == NULL) + if (dvp == NULL) { panic("vnode_authorize: KAUTH_VNODE_DELETE test requires a directory"); + } #endif /* * check to see if we've already authorized the parent @@ -6544,20 +8250,22 @@ vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *i * can skip a whole bunch of work... we will still have to * authorize that this specific child can be removed */ - if (vnode_cache_is_authorized(dvp, ctx, KAUTH_VNODE_DELETE_CHILD) == TRUE) - parent_authorized_for_delete_child = TRUE; + if (vnode_cache_is_authorized(dvp, ctx, KAUTH_VNODE_DELETE_CHILD) == TRUE) { + parent_authorized_for_delete_child = TRUE; + } } else { - dvp = NULL; + vcp->dvp = NULLVP; + vcp->dvap = NULL; } - + /* * Check for read-only filesystems. */ if ((rights & KAUTH_VNODE_WRITE_RIGHTS) && (vp->v_mount->mnt_flag & MNT_RDONLY) && - ((vp->v_type == VREG) || (vp->v_type == VDIR) || - (vp->v_type == VLNK) || (vp->v_type == VCPLX) || - (rights & KAUTH_VNODE_DELETE) || (rights & KAUTH_VNODE_DELETE_CHILD))) { + ((vp->v_type == VREG) || (vp->v_type == VDIR) || + (vp->v_type == VLNK) || (vp->v_type == VCPLX) || + (rights & KAUTH_VNODE_DELETE) || (rights & KAUTH_VNODE_DELETE_CHILD))) { result = EROFS; goto out; } @@ -6576,37 +8284,13 @@ vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *i * check based on VNOP_GETATTR data. Otherwise it returns 1 and sets * an appropriate result, at which point we can return immediately. */ - if ((vp->v_mount->mnt_kern_flag & MNTK_AUTH_OPAQUE) && vnode_authorize_opaque(vp, &result, action, ctx)) - goto out; - - /* - * Get vnode attributes and extended security information for the vnode - * and directory if required. - */ - VATTR_WANTED(&va, va_mode); - VATTR_WANTED(&va, va_uid); - VATTR_WANTED(&va, va_gid); - VATTR_WANTED(&va, va_flags); - VATTR_WANTED(&va, va_acl); - if ((result = vnode_getattr(vp, &va, ctx)) != 0) { - KAUTH_DEBUG("%p ERROR - failed to get vnode attributes - %d", vp, result); + if ((vp->v_mount->mnt_kern_flag & MNTK_AUTH_OPAQUE) && vnode_authorize_opaque(vp, &result, action, ctx)) { goto out; } - if (dvp) { - VATTR_WANTED(&dva, va_mode); - VATTR_WANTED(&dva, va_uid); - VATTR_WANTED(&dva, va_gid); - VATTR_WANTED(&dva, va_flags); - VATTR_WANTED(&dva, va_acl); - if ((result = vnode_getattr(dvp, &dva, ctx)) != 0) { - KAUTH_DEBUG("%p ERROR - failed to get directory vnode attributes - %d", vp, result); - goto out; - } - } /* - * If the vnode is an extended attribute data vnode (eg. a resource fork), *_DATA becomes - * *_EXTATTRIBUTES. + * If the vnode is a namedstream (extended attribute) data vnode (eg. + * a resource fork), *_DATA becomes *_EXTATTRIBUTES. */ if (vnode_isnamedstream(vp)) { if (rights & KAUTH_VNODE_READ_DATA) { @@ -6617,135 +8301,221 @@ vnode_authorize_callback_int(__unused kauth_cred_t unused_cred, __unused void *i rights &= ~KAUTH_VNODE_WRITE_DATA; rights |= KAUTH_VNODE_WRITE_EXTATTRIBUTES; } + + /* + * Point 'vp' to the namedstream's parent for ACL checking + */ + if ((vp->v_parent != NULL) && + (vget_internal(vp->v_parent, 0, VNODE_NODEAD | VNODE_DRAINO) == 0)) { + parent_ref = TRUE; + vcp->vp = vp = vp->v_parent; + } + } + + if (vfs_context_issuser(ctx)) { + /* + * if we're not asking for execute permissions or modifications, + * then we're done, this action is authorized. + */ + if (!(rights & (KAUTH_VNODE_EXECUTE | KAUTH_VNODE_WRITE_RIGHTS))) { + goto success; + } + + is_suser = TRUE; } /* - * Point 'vp' to the resource fork's parent for ACL checking + * Get vnode attributes and extended security information for the vnode + * and directory if required. + * + * If we're root we only want mode bits and flags for checking + * execute and immutability. */ - if (vnode_isnamedstream(vp) && - (vp->v_parent != NULL) && - (vget_internal(vp->v_parent, 0, VNODE_NODEAD | VNODE_DRAINO) == 0)) { - parent_ref = TRUE; - vcp->vp = vp = vp->v_parent; - if (VATTR_IS_SUPPORTED(&va, va_acl) && (va.va_acl != NULL)) - kauth_acl_free(va.va_acl); - VATTR_INIT(&va); - VATTR_WANTED(&va, va_mode); + VATTR_WANTED(&va, va_mode); + VATTR_WANTED(&va, va_flags); + if (!is_suser) { VATTR_WANTED(&va, va_uid); VATTR_WANTED(&va, va_gid); - VATTR_WANTED(&va, va_flags); VATTR_WANTED(&va, va_acl); - if ((result = vnode_getattr(vp, &va, ctx)) != 0) - goto out; } - - /* - * Check for immutability. - * - * In the deletion case, parent directory immutability vetoes specific - * file rights. - */ - if ((result = vnode_authorize_checkimmutable(vp, &va, rights, noimmutable)) != 0) - goto out; - if ((rights & KAUTH_VNODE_DELETE) && - parent_authorized_for_delete_child == FALSE && - ((result = vnode_authorize_checkimmutable(dvp, &dva, KAUTH_VNODE_DELETE_CHILD, 0)) != 0)) - goto out; - - /* - * Clear rights that have been authorized by reaching this point, bail if nothing left to - * check. - */ - rights &= ~(KAUTH_VNODE_LINKTARGET | KAUTH_VNODE_CHECKIMMUTABLE); - if (rights == 0) + if ((result = vnode_getattr(vp, &va, ctx)) != 0) { + KAUTH_DEBUG("%p ERROR - failed to get vnode attributes - %d", vp, result); goto out; + } + VATTR_WANTED(&va, va_type); + VATTR_RETURN(&va, va_type, vnode_vtype(vp)); - /* - * If we're not the superuser, authorize based on file properties; - * note that even if parent_authorized_for_delete_child is TRUE, we - * need to check on the node itself. - */ - if (!vfs_context_issuser(ctx)) { - /* process delete rights */ - if ((rights & KAUTH_VNODE_DELETE) && - ((result = vnode_authorize_delete(vcp, parent_authorized_for_delete_child)) != 0)) - goto out; - - /* process remaining rights */ - if ((rights & ~KAUTH_VNODE_DELETE) && - (result = vnode_authorize_simple(vcp, rights, rights & KAUTH_VNODE_DELETE, &found_deny)) != 0) - goto out; - } else { - - /* - * Execute is only granted to root if one of the x bits is set. This check only - * makes sense if the posix mode bits are actually supported. - */ - if ((rights & KAUTH_VNODE_EXECUTE) && - (vp->v_type == VREG) && - VATTR_IS_SUPPORTED(&va, va_mode) && - !(va.va_mode & (S_IXUSR | S_IXGRP | S_IXOTH))) { - result = EPERM; - KAUTH_DEBUG("%p DENIED - root execute requires at least one x bit in 0x%x", vp, va.va_mode); + if (vcp->dvp) { + VATTR_WANTED(&dva, va_mode); + VATTR_WANTED(&dva, va_flags); + if (!is_suser) { + VATTR_WANTED(&dva, va_uid); + VATTR_WANTED(&dva, va_gid); + VATTR_WANTED(&dva, va_acl); + } + if ((result = vnode_getattr(vcp->dvp, &dva, ctx)) != 0) { + KAUTH_DEBUG("%p ERROR - failed to get directory vnode attributes - %d", vp, result); goto out; } - - KAUTH_DEBUG("%p ALLOWED - caller is superuser", vp); + VATTR_WANTED(&dva, va_type); + VATTR_RETURN(&dva, va_type, vnode_vtype(vcp->dvp)); } + + result = vnode_attr_authorize_internal(vcp, vp->v_mount, rights, is_suser, + &found_deny, noimmutable, parent_authorized_for_delete_child); out: - if (VATTR_IS_SUPPORTED(&va, va_acl) && (va.va_acl != NULL)) + if (VATTR_IS_SUPPORTED(&va, va_acl) && (va.va_acl != NULL)) { kauth_acl_free(va.va_acl); - if (VATTR_IS_SUPPORTED(&dva, va_acl) && (dva.va_acl != NULL)) + } + if (VATTR_IS_SUPPORTED(&dva, va_acl) && (dva.va_acl != NULL)) { kauth_acl_free(dva.va_acl); + } if (result) { - if (parent_ref) + if (parent_ref) { vnode_put(vp); + } *errorp = result; KAUTH_DEBUG("%p DENIED - auth denied", vp); - return(KAUTH_RESULT_DENY); + return KAUTH_RESULT_DENY; } if ((rights & KAUTH_VNODE_SEARCH) && found_deny == FALSE && vp->v_type == VDIR) { - /* + /* * if we were successfully granted the right to search this directory * and there were NO ACL DENYs for search and the posix permissions also don't - * deny execute, we can synthesize a global right that allows anyone to + * deny execute, we can synthesize a global right that allows anyone to * traverse this directory during a pathname lookup without having to * match the credential associated with this cache of rights. + * + * Note that we can correctly cache KAUTH_VNODE_SEARCHBYANYONE + * only if we actually check ACLs which we don't for root. As + * a workaround, the lookup fast path checks for root. */ - if (!VATTR_IS_SUPPORTED(&va, va_mode) || + if (!VATTR_IS_SUPPORTED(&va, va_mode) || ((va.va_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) == - (S_IXUSR | S_IXGRP | S_IXOTH))) { - vnode_cache_authorized_action(vp, ctx, KAUTH_VNODE_SEARCHBYANYONE); - } - } - if ((rights & KAUTH_VNODE_DELETE) && parent_authorized_for_delete_child == FALSE) { - /* - * parent was successfully and newly authorized for content deletions - * add it to the cache, but only if it doesn't have the sticky - * bit set on it. This same check is done earlier guarding - * fetching of dva, and if we jumped to out without having done - * this, we will have returned already because of a non-zero - * 'result' value. - */ - if (VATTR_IS_SUPPORTED(&dva, va_mode) && - !(dva.va_mode & (S_ISVTX))) { - /* OK to cache delete rights */ - KAUTH_DEBUG("%p - caching DELETE_CHILD rights", dvp); - vnode_cache_authorized_action(dvp, ctx, KAUTH_VNODE_DELETE_CHILD); + (S_IXUSR | S_IXGRP | S_IXOTH))) { + vnode_cache_authorized_action(vp, ctx, KAUTH_VNODE_SEARCHBYANYONE); } } - if (parent_ref) +success: + if (parent_ref) { vnode_put(vp); + } + /* * Note that this implies that we will allow requests for no rights, as well as * for rights that we do not recognise. There should be none of these. */ KAUTH_DEBUG("%p ALLOWED - auth granted", vp); - return(KAUTH_RESULT_ALLOW); + return KAUTH_RESULT_ALLOW; +} + +int +vnode_attr_authorize_init(struct vnode_attr *vap, struct vnode_attr *dvap, + kauth_action_t action, vfs_context_t ctx) +{ + VATTR_INIT(vap); + VATTR_WANTED(vap, va_type); + VATTR_WANTED(vap, va_mode); + VATTR_WANTED(vap, va_flags); + if (dvap) { + VATTR_INIT(dvap); + if (action & KAUTH_VNODE_DELETE) { + VATTR_WANTED(dvap, va_type); + VATTR_WANTED(dvap, va_mode); + VATTR_WANTED(dvap, va_flags); + } + } else if (action & KAUTH_VNODE_DELETE) { + return EINVAL; + } + + if (!vfs_context_issuser(ctx)) { + VATTR_WANTED(vap, va_uid); + VATTR_WANTED(vap, va_gid); + VATTR_WANTED(vap, va_acl); + if (dvap && (action & KAUTH_VNODE_DELETE)) { + VATTR_WANTED(dvap, va_uid); + VATTR_WANTED(dvap, va_gid); + VATTR_WANTED(dvap, va_acl); + } + } + + return 0; +} + +int +vnode_attr_authorize(struct vnode_attr *vap, struct vnode_attr *dvap, mount_t mp, + kauth_action_t action, vfs_context_t ctx) +{ + struct _vnode_authorize_context auth_context; + vauth_ctx vcp; + kauth_ace_rights_t rights; + int noimmutable; + boolean_t found_deny; + boolean_t is_suser = FALSE; + int result = 0; + + vcp = &auth_context; + vcp->ctx = ctx; + vcp->vp = NULLVP; + vcp->vap = vap; + vcp->dvp = NULLVP; + vcp->dvap = dvap; + vcp->flags = vcp->flags_valid = 0; + + noimmutable = (action & KAUTH_VNODE_NOIMMUTABLE) ? 1 : 0; + rights = action & ~(KAUTH_VNODE_ACCESS | KAUTH_VNODE_NOIMMUTABLE); + + /* + * Check for read-only filesystems. + */ + if ((rights & KAUTH_VNODE_WRITE_RIGHTS) && + mp && (mp->mnt_flag & MNT_RDONLY) && + ((vap->va_type == VREG) || (vap->va_type == VDIR) || + (vap->va_type == VLNK) || (rights & KAUTH_VNODE_DELETE) || + (rights & KAUTH_VNODE_DELETE_CHILD))) { + result = EROFS; + goto out; + } + + /* + * Check for noexec filesystems. + */ + if ((rights & KAUTH_VNODE_EXECUTE) && + (vap->va_type == VREG) && mp && (mp->mnt_flag & MNT_NOEXEC)) { + result = EACCES; + goto out; + } + + if (vfs_context_issuser(ctx)) { + /* + * if we're not asking for execute permissions or modifications, + * then we're done, this action is authorized. + */ + if (!(rights & (KAUTH_VNODE_EXECUTE | KAUTH_VNODE_WRITE_RIGHTS))) { + goto out; + } + is_suser = TRUE; + } else { + if (!VATTR_IS_SUPPORTED(vap, va_uid) || + !VATTR_IS_SUPPORTED(vap, va_gid) || + (mp && vfs_extendedsecurity(mp) && !VATTR_IS_SUPPORTED(vap, va_acl))) { + panic("vnode attrs not complete for vnode_attr_authorize\n"); + } + } + + result = vnode_attr_authorize_internal(vcp, mp, rights, is_suser, + &found_deny, noimmutable, FALSE); + + if (result == EPERM) { + result = EACCES; + } +out: + return result; } -int + +int vnode_authattr_new(vnode_t dvp, struct vnode_attr *vap, int noauth, vfs_context_t ctx) { return vnode_authattr_new_internal(dvp, vap, noauth, NULL, ctx); @@ -6758,11 +8528,13 @@ vnode_authattr_new(vnode_t dvp, struct vnode_attr *vap, int noauth, vfs_context_ static int vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uint32_t *defaulted_fieldsp, vfs_context_t ctx) { - int error; - int has_priv_suser, ismember, defaulted_owner, defaulted_group, defaulted_mode; - kauth_cred_t cred; - guid_t changer; - mount_t dmp; + int error; + int has_priv_suser, ismember, defaulted_owner, defaulted_group, defaulted_mode; + uint32_t inherit_flags; + kauth_cred_t cred; + guid_t changer; + mount_t dmp; + struct vnode_attr dva; error = 0; @@ -6772,6 +8544,8 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin defaulted_owner = defaulted_group = defaulted_mode = 0; + inherit_flags = 0; + /* * Require that the filesystem support extended security to apply any. */ @@ -6780,7 +8554,7 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin error = EINVAL; goto out; } - + /* * Default some fields. */ @@ -6801,6 +8575,17 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin } } + /* + * We need the dvp's va_flags and *may* need the gid of the directory, + * we ask for both here. + */ + VATTR_INIT(&dva); + VATTR_WANTED(&dva, va_gid); + VATTR_WANTED(&dva, va_flags); + if ((error = vnode_getattr(dvp, &dva, ctx)) != 0) { + goto out; + } + /* * If the filesystem is mounted IGNORE_OWNERSHIP and an explicit grouo is set, that * group takes ownership of all new files. @@ -6811,11 +8596,6 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin } else { if (!VATTR_IS_ACTIVE(vap, va_gid)) { /* default group comes from parent object, fallback to current user */ - struct vnode_attr dva; - VATTR_INIT(&dva); - VATTR_WANTED(&dva, va_gid); - if ((error = vnode_getattr(dvp, &dva, ctx)) != 0) - goto out; if (VATTR_IS_SUPPORTED(&dva, va_gid)) { VATTR_SET(vap, va_gid, dva.va_gid); } else { @@ -6825,9 +8605,16 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin } } - if (!VATTR_IS_ACTIVE(vap, va_flags)) + if (!VATTR_IS_ACTIVE(vap, va_flags)) { VATTR_SET(vap, va_flags, 0); - + } + + /* Determine if SF_RESTRICTED should be inherited from the parent + * directory. */ + if (VATTR_IS_SUPPORTED(&dva, va_flags)) { + inherit_flags = dva.va_flags & (UF_DATAVAULT | SF_RESTRICTED); + } + /* default mode is everything, masked with current umask */ if (!VATTR_IS_ACTIVE(vap, va_mode)) { VATTR_SET(vap, va_mode, ACCESSPERMS & ~vfs_context_proc(ctx)->p_fd->fd_cmask); @@ -6839,7 +8626,7 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin nanotime(&vap->va_create_time); VATTR_SET_ACTIVE(vap, va_create_time); } - + /* * Check for attempts to set nonsensical fields. */ @@ -6854,8 +8641,9 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin * Quickly check for the applicability of any enforcement here. * Tests below maintain the integrity of the local security model. */ - if (vfs_authopaque(dvp->v_mount)) - goto out; + if (vfs_authopaque(dvp->v_mount)) { + goto out; + } /* * We need to know if the caller is the superuser, or if the work is @@ -6871,6 +8659,7 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin if (VATTR_IS_ACTIVE(vap, va_flags)) { + vap->va_flags &= ~SF_SYNTHETIC; if (has_priv_suser) { if ((vap->va_flags & (UF_SETTABLE | SF_SETTABLE)) != vap->va_flags) { error = EPERM; @@ -6951,7 +8740,13 @@ vnode_authattr_new_internal(vnode_t dvp, struct vnode_attr *vap, int noauth, uin } } } -out: +out: + if (inherit_flags) { + /* Apply SF_RESTRICTED to the file if its parent directory was + * restricted. This is done at the end so that root is not + * required if this flag is only set due to inheritance. */ + VATTR_SET(vap, va_flags, (vap->va_flags | inherit_flags)); + } if (defaulted_fieldsp) { if (defaulted_mode) { *defaulted_fieldsp |= VATTR_PREPARE_DEFAULTED_MODE; @@ -6963,7 +8758,7 @@ out: *defaulted_fieldsp |= VATTR_PREPARE_DEFAULTED_UID; } } - return(error); + return error; } /* @@ -6980,14 +8775,14 @@ int vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_context_t ctx) { struct vnode_attr ova; - kauth_action_t required_action; - int error, has_priv_suser, ismember, chowner, chgroup, clear_suid, clear_sgid; - guid_t changer; - gid_t group; - uid_t owner; - mode_t newmode; - kauth_cred_t cred; - uint32_t fdelta; + kauth_action_t required_action; + int error, has_priv_suser, ismember, chowner, chgroup, clear_suid, clear_sgid; + guid_t changer; + gid_t group; + uid_t owner; + mode_t newmode; + kauth_cred_t cred; + uint32_t fdelta; VATTR_INIT(&ova); required_action = 0; @@ -6996,9 +8791,10 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ /* * Quickly check for enforcement applicability. */ - if (vfs_authopaque(vp->v_mount)) + if (vfs_authopaque(vp->v_mount)) { goto out; - + } + /* * Check for attempts to set nonsensical fields. */ @@ -7013,7 +8809,7 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ */ cred = vfs_context_ucred(ctx); has_priv_suser = kauth_cred_issuser(cred); - + /* * If any of the following are changing, we need information from the old file: * va_uid @@ -7043,15 +8839,15 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ VATTR_IS_ACTIVE(vap, va_change_time) || VATTR_IS_ACTIVE(vap, va_modify_time) || VATTR_IS_ACTIVE(vap, va_access_time) || - VATTR_IS_ACTIVE(vap, va_backup_time)) { - + VATTR_IS_ACTIVE(vap, va_backup_time) || + VATTR_IS_ACTIVE(vap, va_addedtime)) { VATTR_WANTED(&ova, va_uid); -#if 0 /* enable this when we support UUIDs as official owners */ +#if 0 /* enable this when we support UUIDs as official owners */ VATTR_WANTED(&ova, va_uuuid); #endif KAUTH_DEBUG("ATTR - timestamps changing, fetching uid and GUID"); } - + /* * If flags are being changed, we need the old flags. */ @@ -7072,10 +8868,10 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ * If the size is being set, make sure it's not a directory. */ if (VATTR_IS_ACTIVE(vap, va_data_size)) { - /* size is meaningless on a directory, don't permit this */ - if (vnode_isdir(vp)) { - KAUTH_DEBUG("ATTR - ERROR: size change requested on a directory"); - error = EISDIR; + /* size is only meaningful on regular files, don't permit otherwise */ + if (!vnode_isreg(vp)) { + KAUTH_DEBUG("ATTR - ERROR: size change requested on non-file"); + error = vnode_isdir(vp) ? EISDIR : EINVAL; goto out; } } @@ -7094,8 +8890,8 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ */ if (VATTR_IS_ACTIVE(vap, va_data_size)) { /* if we can't get the size, or it's different, we need write access */ - KAUTH_DEBUG("ATTR - size change, requiring WRITE_DATA"); - required_action |= KAUTH_VNODE_WRITE_DATA; + KAUTH_DEBUG("ATTR - size change, requiring WRITE_DATA"); + required_action |= KAUTH_VNODE_WRITE_DATA; } /* @@ -7112,7 +8908,8 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ VATTR_IS_ACTIVE(vap, va_change_time) || VATTR_IS_ACTIVE(vap, va_modify_time) || VATTR_IS_ACTIVE(vap, va_access_time) || - VATTR_IS_ACTIVE(vap, va_backup_time)) { + VATTR_IS_ACTIVE(vap, va_backup_time) || + VATTR_IS_ACTIVE(vap, va_addedtime)) { /* * The owner and root may set any timestamps they like, * provided that the file is not immutable. The owner still needs @@ -7157,7 +8954,7 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ * existing group information in the case we're not setting it right now. */ if (vap->va_mode & S_ISGID) { - required_action |= KAUTH_VNODE_CHECKIMMUTABLE; /* always required */ + required_action |= KAUTH_VNODE_CHECKIMMUTABLE; /* always required */ if (!has_priv_suser) { if (VATTR_IS_ACTIVE(vap, va_gid)) { group = vap->va_gid; @@ -7188,7 +8985,7 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ * Can't set the setuid bit unless you're root or the file's owner. */ if (vap->va_mode & S_ISUID) { - required_action |= KAUTH_VNODE_CHECKIMMUTABLE; /* always required */ + required_action |= KAUTH_VNODE_CHECKIMMUTABLE; /* always required */ if (!has_priv_suser) { if (VATTR_IS_ACTIVE(vap, va_uid)) { owner = vap->va_uid; @@ -7210,7 +9007,7 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ } } } - + /* * Validate/mask flags changes. This checks that only the flags in * the UF_SETTABLE mask are being set, and preserves the flags in @@ -7219,10 +9016,12 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ * Since flags changes may be made in conjunction with other changes, * we will ask the auth code to ignore immutability in the case that * the SF_* flags are not set and we are only manipulating the file flags. - * + * */ if (VATTR_IS_ACTIVE(vap, va_flags)) { /* compute changing flags bits */ + vap->va_flags &= ~SF_SYNTHETIC; + ova.va_flags &= ~SF_SYNTHETIC; if (VATTR_IS_SUPPORTED(&ova, va_flags)) { fdelta = vap->va_flags ^ ova.va_flags; } else { @@ -7283,16 +9082,16 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ */ if (VATTR_IS_ACTIVE(vap, va_uid)) { if (VATTR_IS_SUPPORTED(&ova, va_uid) && (vap->va_uid != ova.va_uid)) { - if (!has_priv_suser && (kauth_cred_getuid(cred) != vap->va_uid)) { - KAUTH_DEBUG(" DENIED - non-superuser cannot change ownershipt to a third party"); - error = EPERM; - goto out; + if (!has_priv_suser && (kauth_cred_getuid(cred) != vap->va_uid)) { + KAUTH_DEBUG(" DENIED - non-superuser cannot change ownershipt to a third party"); + error = EPERM; + goto out; + } + chowner = 1; } - chowner = 1; - } clear_suid = 1; } - + /* * gid changing * Note that if the filesystem didn't give us a GID, we expect that it doesn't @@ -7301,20 +9100,20 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ */ if (VATTR_IS_ACTIVE(vap, va_gid)) { if (VATTR_IS_SUPPORTED(&ova, va_gid) && (vap->va_gid != ova.va_gid)) { - if (!has_priv_suser) { - if ((error = kauth_cred_ismember_gid(cred, vap->va_gid, &ismember)) != 0) { - KAUTH_DEBUG(" ERROR - got %d checking for membership in %d", error, vap->va_gid); - goto out; - } - if (!ismember) { - KAUTH_DEBUG(" DENIED - group change from %d to %d but not a member of target group", - ova.va_gid, vap->va_gid); - error = EPERM; - goto out; + if (!has_priv_suser) { + if ((error = kauth_cred_ismember_gid(cred, vap->va_gid, &ismember)) != 0) { + KAUTH_DEBUG(" ERROR - got %d checking for membership in %d", error, vap->va_gid); + goto out; + } + if (!ismember) { + KAUTH_DEBUG(" DENIED - group change from %d to %d but not a member of target group", + ova.va_gid, vap->va_gid); + error = EPERM; + goto out; + } } + chgroup = 1; } - chgroup = 1; - } clear_sgid = 1; } @@ -7324,9 +9123,10 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ if (VATTR_IS_ACTIVE(vap, va_uuuid)) { /* if the owner UUID is not actually changing ... */ if (VATTR_IS_SUPPORTED(&ova, va_uuuid)) { - if (kauth_guid_equal(&vap->va_uuuid, &ova.va_uuuid)) + if (kauth_guid_equal(&vap->va_uuuid, &ova.va_uuuid)) { goto no_uuuid_change; - + } + /* * If the current owner UUID is a null GUID, check * it against the UUID corresponding to the owner UID. @@ -7336,11 +9136,12 @@ vnode_authattr(vnode_t vp, struct vnode_attr *vap, kauth_action_t *actionp, vfs_ guid_t uid_guid; if (kauth_cred_uid2guid(ova.va_uid, &uid_guid) == 0 && - kauth_guid_equal(&vap->va_uuuid, &uid_guid)) - goto no_uuuid_change; + kauth_guid_equal(&vap->va_uuuid, &uid_guid)) { + goto no_uuuid_change; + } } } - + /* * The owner UUID cannot be set by a non-superuser to anything other than * their own or a null GUID (to "unset" the owner UUID). @@ -7371,8 +9172,9 @@ no_uuuid_change: if (VATTR_IS_ACTIVE(vap, va_guuid)) { /* if the group UUID is not actually changing ... */ if (VATTR_IS_SUPPORTED(&ova, va_guuid)) { - if (kauth_guid_equal(&vap->va_guuid, &ova.va_guuid)) + if (kauth_guid_equal(&vap->va_guuid, &ova.va_guuid)) { goto no_guuid_change; + } /* * If the current group UUID is a null UUID, check @@ -7383,8 +9185,9 @@ no_uuuid_change: guid_t gid_guid; if (kauth_cred_gid2guid(ova.va_gid, &gid_guid) == 0 && - kauth_guid_equal(&vap->va_guuid, &gid_guid)) - goto no_guuid_change; + kauth_guid_equal(&vap->va_guuid, &gid_guid)) { + goto no_guuid_change; + } } } @@ -7397,9 +9200,9 @@ no_uuuid_change: * system. */ if (!has_priv_suser) { - if (kauth_guid_equal(&vap->va_guuid, &kauth_null_guid)) + if (kauth_guid_equal(&vap->va_guuid, &kauth_null_guid)) { ismember = 1; - else if ((error = kauth_cred_ismember_guid(cred, &vap->va_guuid, &ismember)) != 0) { + } else if ((error = kauth_cred_ismember_guid(cred, &vap->va_guuid, &ismember)) != 0) { KAUTH_DEBUG(" ERROR - got %d trying to check group membership", error); goto out; } @@ -7427,22 +9230,35 @@ no_guuid_change: } if (chgroup && !chowner) { KAUTH_DEBUG("ATTR - group change, requiring WRITE_SECURITY"); - required_action |= KAUTH_VNODE_WRITE_SECURITY; - } - - /* clear set-uid and set-gid bits as required by Posix */ - if (VATTR_IS_ACTIVE(vap, va_mode)) { - newmode = vap->va_mode; - } else if (VATTR_IS_SUPPORTED(&ova, va_mode)) { - newmode = ova.va_mode; - } else { - KAUTH_DEBUG("CHOWN - trying to change owner but cannot get mode from filesystem to mask setugid bits"); - newmode = 0; + required_action |= KAUTH_VNODE_WRITE_SECURITY; } - if (newmode & (S_ISUID | S_ISGID)) { - VATTR_SET(vap, va_mode, newmode & ~(S_ISUID | S_ISGID)); - KAUTH_DEBUG("CHOWN - masking setugid bits from mode %o to %o", newmode, vap->va_mode); + } + + /* + * clear set-uid and set-gid bits. POSIX only requires this for + * non-privileged processes but we do it even for root. + */ + if (VATTR_IS_ACTIVE(vap, va_mode)) { + newmode = vap->va_mode; + } else if (VATTR_IS_SUPPORTED(&ova, va_mode)) { + newmode = ova.va_mode; + } else { + KAUTH_DEBUG("CHOWN - trying to change owner but cannot get mode from filesystem to mask setugid bits"); + newmode = 0; + } + + /* chown always clears setuid/gid bits. An exception is made for + * setattrlist which can set both at the same time: on a file: + * setattrlist is allowed to set the new mode on the file and change (chown) + * uid/gid. + */ + if (newmode & (S_ISUID | S_ISGID)) { + if (!VATTR_IS_ACTIVE(vap, va_mode)) { + KAUTH_DEBUG("CHOWN - masking setugid bits from mode %o to %o", + newmode, newmode & ~(S_ISUID | S_ISGID)); + newmode &= ~(S_ISUID | S_ISGID); } + VATTR_SET(vap, va_mode, newmode); } } @@ -7450,10 +9266,8 @@ no_guuid_change: * Authorise changes in the ACL. */ if (VATTR_IS_ACTIVE(vap, va_acl)) { - /* no existing ACL */ if (!VATTR_IS_ACTIVE(&ova, va_acl) || (ova.va_acl == NULL)) { - /* adding an ACL */ if (vap->va_acl != NULL) { required_action |= KAUTH_VNODE_WRITE_SECURITY; @@ -7474,7 +9288,7 @@ no_guuid_change: } else if (vap->va_acl->acl_entrycount > 0) { /* both ACLs have the same ACE count, said count is 1 or more, bitwise compare ACLs */ if (memcmp(&vap->va_acl->acl_ace[0], &ova.va_acl->acl_ace[0], - sizeof(struct kauth_ace) * vap->va_acl->acl_entrycount)) { + sizeof(struct kauth_ace) * vap->va_acl->acl_entrycount)) { required_action |= KAUTH_VNODE_WRITE_SECURITY; KAUTH_DEBUG("CHMOD - changing ACL entries"); } @@ -7485,15 +9299,18 @@ no_guuid_change: /* * Other attributes that require authorisation. */ - if (VATTR_IS_ACTIVE(vap, va_encoding)) + if (VATTR_IS_ACTIVE(vap, va_encoding)) { required_action |= KAUTH_VNODE_WRITE_ATTRIBUTES; - + } + out: - if (VATTR_IS_SUPPORTED(&ova, va_acl) && (ova.va_acl != NULL)) + if (VATTR_IS_SUPPORTED(&ova, va_acl) && (ova.va_acl != NULL)) { kauth_acl_free(ova.va_acl); - if (error == 0) + } + if (error == 0) { *actionp = required_action; - return(error); + } + return error; } static int @@ -7503,7 +9320,7 @@ setlocklocal_callback(struct vnode *vp, __unused void *cargs) vp->v_flag |= VLOCKLOCAL; vnode_unlock(vp); - return (VNODE_RETURNED); + return VNODE_RETURNED; } void @@ -7521,21 +9338,37 @@ vfs_setlocklocal(mount_t mp) } void -vfs_setunmountpreflight(mount_t mp) +vfs_setcompoundopen(mount_t mp) { mount_lock_spin(mp); - mp->mnt_kern_flag |= MNTK_UNMOUNT_PREFLIGHT; + mp->mnt_compound_ops |= COMPOUND_VNOP_OPEN; mount_unlock(mp); } void -vfs_setcompoundopen(mount_t mp) +vnode_setswapmount(vnode_t vp) { - mount_lock_spin(mp); - mp->mnt_compound_ops |= COMPOUND_VNOP_OPEN; - mount_unlock(mp); + mount_lock(vp->v_mount); + vp->v_mount->mnt_kern_flag |= MNTK_SWAP_MOUNT; + mount_unlock(vp->v_mount); +} + + +int64_t +vnode_getswappin_avail(vnode_t vp) +{ + int64_t max_swappin_avail = 0; + + mount_lock(vp->v_mount); + if (vp->v_mount->mnt_ioflags & MNT_IOFLAGS_SWAPPIN_SUPPORTED) { + max_swappin_avail = vp->v_mount->mnt_max_swappin_available; + } + mount_unlock(vp->v_mount); + + return max_swappin_avail; } + void vn_setunionwait(vnode_t vp) { @@ -7549,58 +9382,103 @@ void vn_checkunionwait(vnode_t vp) { vnode_lock_spin(vp); - while ((vp->v_flag & VISUNION) == VISUNION) + while ((vp->v_flag & VISUNION) == VISUNION) { msleep((caddr_t)&vp->v_flag, &vp->v_lock, 0, 0, 0); + } vnode_unlock(vp); } void vn_clearunionwait(vnode_t vp, int locked) { - if (!locked) + if (!locked) { vnode_lock_spin(vp); - if((vp->v_flag & VISUNION) == VISUNION) { + } + if ((vp->v_flag & VISUNION) == VISUNION) { vp->v_flag &= ~VISUNION; wakeup((caddr_t)&vp->v_flag); } - if (!locked) + if (!locked) { vnode_unlock(vp); + } } -/* - * XXX - get "don't trigger mounts" flag for thread; used by autofs. - */ -extern int thread_notrigger(void); - int -thread_notrigger(void) +vnode_materialize_dataless_file(vnode_t vp, uint64_t op_type) { - struct uthread *uth = (struct uthread *)get_bsdthread_info(current_thread()); - return (uth->uu_notrigger); + int error; + + /* Swap files are special; ignore them */ + if (vnode_isswap(vp)) { + return 0; + } + + error = resolve_nspace_item(vp, + op_type | NAMESPACE_HANDLER_NSPACE_EVENT); + + /* + * The file resolver owns the logic about what error to return + * to the caller. We only need to handle a couple of special + * cases here: + */ + if (error == EJUSTRETURN) { + /* + * The requesting process is allowed to interact with + * dataless objects. Make a couple of sanity-checks + * here to ensure the action makes sense. + */ + switch (op_type) { + case NAMESPACE_HANDLER_WRITE_OP: + case NAMESPACE_HANDLER_TRUNCATE_OP: + case NAMESPACE_HANDLER_RENAME_OP: + /* + * This handles the case of the resolver itself + * writing data to the file (or throwing it + * away). + */ + error = 0; + break; + case NAMESPACE_HANDLER_READ_OP: + /* + * This handles the case of the resolver needing + * to look up inside of a dataless directory while + * it's in the process of materializing it (for + * example, creating files or directories). + */ + error = (vnode_vtype(vp) == VDIR) ? 0 : EBADF; + break; + default: + error = EBADF; + break; + } + } + + return error; } -/* +/* * Removes orphaned apple double files during a rmdir * Works by: * 1. vnode_suspend(). - * 2. Call VNOP_READDIR() till the end of directory is reached. - * 3. Check if the directory entries returned are regular files with name starting with "._". If not, return ENOTEMPTY. + * 2. Call VNOP_READDIR() till the end of directory is reached. + * 3. Check if the directory entries returned are regular files with name starting with "._". If not, return ENOTEMPTY. * 4. Continue (2) and (3) till end of directory is reached. * 5. If all the entries in the directory were files with "._" name, delete all the files. * 6. vnode_resume() * 7. If deletion of all files succeeded, call VNOP_RMDIR() again. */ -errno_t rmdir_remove_orphaned_appleDouble(vnode_t vp , vfs_context_t ctx, int * restart_flag) +errno_t +rmdir_remove_orphaned_appleDouble(vnode_t vp, vfs_context_t ctx, int * restart_flag) { - #define UIO_BUFF_SIZE 2048 uio_t auio = NULL; int eofflag, siz = UIO_BUFF_SIZE, nentries = 0; int open_flag = 0, full_erase_flag = 0; - char uio_buf[ UIO_SIZEOF(1) ]; - char *rbuf = NULL, *cpos, *cend; - struct nameidata nd_temp; + char uio_buf[UIO_SIZEOF(1)]; + char *rbuf = NULL; + void *dir_pos; + void *dir_end; struct dirent *dp; errno_t error; @@ -7609,31 +9487,44 @@ errno_t rmdir_remove_orphaned_appleDouble(vnode_t vp , vfs_context_t ctx, int * /* * restart_flag is set so that the calling rmdir sleeps and resets */ - if (error == EBUSY) + if (error == EBUSY) { *restart_flag = 1; - if (error != 0) - goto outsc; + } + if (error != 0) { + return error; + } + + /* + * Prevent dataless fault materialization while we have + * a suspended vnode. + */ + uthread_t ut = get_bsdthread_info(current_thread()); + bool saved_nodatalessfaults = + (ut->uu_flag & UT_NSPACE_NODATALESSFAULTS) ? true : false; + ut->uu_flag |= UT_NSPACE_NODATALESSFAULTS; /* * set up UIO */ MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); - if (rbuf) + if (rbuf) { auio = uio_createwithbuffer(1, 0, UIO_SYSSPACE, UIO_READ, - &uio_buf[0], sizeof(uio_buf)); + &uio_buf[0], sizeof(uio_buf)); + } if (!rbuf || !auio) { error = ENOMEM; goto outsc; } - uio_setoffset(auio,0); + uio_setoffset(auio, 0); eofflag = 0; - if ((error = VNOP_OPEN(vp, FREAD, ctx))) - goto outsc; - else + if ((error = VNOP_OPEN(vp, FREAD, ctx))) { + goto outsc; + } else { open_flag = 1; + } /* * First pass checks if all files are appleDouble files. @@ -7644,60 +9535,63 @@ errno_t rmdir_remove_orphaned_appleDouble(vnode_t vp , vfs_context_t ctx, int * uio_reset(auio, uio_offset(auio), UIO_SYSSPACE, UIO_READ); uio_addiov(auio, CAST_USER_ADDR_T(rbuf), UIO_BUFF_SIZE); - if((error = VNOP_READDIR(vp, auio, 0, &eofflag, &nentries, ctx))) + if ((error = VNOP_READDIR(vp, auio, 0, &eofflag, &nentries, ctx))) { goto outsc; + } - if (uio_resid(auio) != 0) + if (uio_resid(auio) != 0) { siz -= uio_resid(auio); + } /* * Iterate through directory */ - cpos = rbuf; - cend = rbuf + siz; - dp = (struct dirent*) cpos; + dir_pos = (void*) rbuf; + dir_end = (void*) (rbuf + siz); + dp = (struct dirent*) (dir_pos); - if (cpos == cend) + if (dir_pos == dir_end) { eofflag = 1; + } - while ((cpos < cend)) { + while (dir_pos < dir_end) { /* * Check for . and .. as well as directories */ - if (dp->d_ino != 0 && - !((dp->d_namlen == 1 && dp->d_name[0] == '.') || - (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.'))) { + if (dp->d_ino != 0 && + !((dp->d_namlen == 1 && dp->d_name[0] == '.') || + (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.'))) { /* * Check for irregular files and ._ files * If there is a ._._ file abort the op */ - if ( dp->d_namlen < 2 || - strncmp(dp->d_name,"._",2) || - (dp->d_namlen >= 4 && !strncmp(&(dp->d_name[2]), "._",2))) { + if (dp->d_namlen < 2 || + strncmp(dp->d_name, "._", 2) || + (dp->d_namlen >= 4 && !strncmp(&(dp->d_name[2]), "._", 2))) { error = ENOTEMPTY; goto outsc; } } - cpos += dp->d_reclen; - dp = (struct dirent*)cpos; + dir_pos = (void*) ((uint8_t*)dir_pos + dp->d_reclen); + dp = (struct dirent*)dir_pos; } - + /* - * workaround for HFS/NFS setting eofflag before end of file + * workaround for HFS/NFS setting eofflag before end of file */ - if (vp->v_tag == VT_HFS && nentries > 2) - eofflag=0; + if (vp->v_tag == VT_HFS && nentries > 2) { + eofflag = 0; + } if (vp->v_tag == VT_NFS) { if (eofflag && !full_erase_flag) { full_erase_flag = 1; eofflag = 0; uio_reset(auio, 0, UIO_SYSSPACE, UIO_READ); - } - else if (!eofflag && full_erase_flag) + } else if (!eofflag && full_erase_flag) { full_erase_flag = 0; + } } - } while (!eofflag); /* * If we've made it here all the files in the dir are ._ files. @@ -7716,84 +9610,89 @@ errno_t rmdir_remove_orphaned_appleDouble(vnode_t vp , vfs_context_t ctx, int * error = VNOP_READDIR(vp, auio, 0, &eofflag, &nentries, ctx); - if (error != 0) + if (error != 0) { goto outsc; + } - if (uio_resid(auio) != 0) + if (uio_resid(auio) != 0) { siz -= uio_resid(auio); + } /* * Iterate through directory */ - cpos = rbuf; - cend = rbuf + siz; - dp = (struct dirent*) cpos; - - if (cpos == cend) + dir_pos = (void*) rbuf; + dir_end = (void*) (rbuf + siz); + dp = (struct dirent*) dir_pos; + + if (dir_pos == dir_end) { eofflag = 1; - - while ((cpos < cend)) { + } + + while (dir_pos < dir_end) { /* * Check for . and .. as well as directories */ - if (dp->d_ino != 0 && - !((dp->d_namlen == 1 && dp->d_name[0] == '.') || - (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.')) - ) { - - NDINIT(&nd_temp, DELETE, OP_UNLINK, USEDVP, - UIO_SYSSPACE, CAST_USER_ADDR_T(dp->d_name), - ctx); - nd_temp.ni_dvp = vp; - error = unlink1(ctx, &nd_temp, 0); - - if (error && error != ENOENT) { + if (dp->d_ino != 0 && + !((dp->d_namlen == 1 && dp->d_name[0] == '.') || + (dp->d_namlen == 2 && dp->d_name[0] == '.' && dp->d_name[1] == '.')) + ) { + error = unlink1(ctx, vp, + CAST_USER_ADDR_T(dp->d_name), UIO_SYSSPACE, + VNODE_REMOVE_SKIP_NAMESPACE_EVENT | + VNODE_REMOVE_NO_AUDIT_PATH); + + if (error && error != ENOENT) { goto outsc; } - } - cpos += dp->d_reclen; - dp = (struct dirent*)cpos; + dir_pos = (void*) ((uint8_t*)dir_pos + dp->d_reclen); + dp = (struct dirent*)dir_pos; } - + /* - * workaround for HFS/NFS setting eofflag before end of file + * workaround for HFS/NFS setting eofflag before end of file */ - if (vp->v_tag == VT_HFS && nentries > 2) - eofflag=0; + if (vp->v_tag == VT_HFS && nentries > 2) { + eofflag = 0; + } if (vp->v_tag == VT_NFS) { if (eofflag && !full_erase_flag) { full_erase_flag = 1; eofflag = 0; uio_reset(auio, 0, UIO_SYSSPACE, UIO_READ); - } - else if (!eofflag && full_erase_flag) + } else if (!eofflag && full_erase_flag) { full_erase_flag = 0; + } } - } while (!eofflag); error = 0; outsc: - if (open_flag) + if (open_flag) { VNOP_CLOSE(vp, FREAD, ctx); + } - uio_free(auio); + if (auio) { + uio_free(auio); + } FREE(rbuf, M_TEMP); - vnode_resume(vp); - + if (saved_nodatalessfaults == false) { + ut->uu_flag &= ~UT_NSPACE_NODATALESSFAULTS; + } - return(error); + vnode_resume(vp); + return error; } -void -lock_vnode_and_post(vnode_t vp, int kevent_num) +void +lock_vnode_and_post(vnode_t vp, int kevent_num) { /* Only take the lock if there's something there! */ if (vp->v_knotes.slh_first != NULL) { @@ -7803,19 +9702,168 @@ lock_vnode_and_post(vnode_t vp, int kevent_num) } } +void panic_print_vnodes(void); + +/* define PANIC_PRINTS_VNODES only if investigation is required. */ +#ifdef PANIC_PRINTS_VNODES + +static const char * +__vtype(uint16_t vtype) +{ + switch (vtype) { + case VREG: + return "R"; + case VDIR: + return "D"; + case VBLK: + return "B"; + case VCHR: + return "C"; + case VLNK: + return "L"; + case VSOCK: + return "S"; + case VFIFO: + return "F"; + case VBAD: + return "x"; + case VSTR: + return "T"; + case VCPLX: + return "X"; + default: + return "?"; + } +} + +/* + * build a path from the bottom up + * NOTE: called from the panic path - no alloc'ing of memory and no locks! + */ +static char * +__vpath(vnode_t vp, char *str, int len, int depth) +{ + int vnm_len; + const char *src; + char *dst; + + if (len <= 0) { + return str; + } + /* str + len is the start of the string we created */ + if (!vp->v_name) { + return str + len; + } + + /* follow mount vnodes to get the full path */ + if ((vp->v_flag & VROOT)) { + if (vp->v_mount != NULL && vp->v_mount->mnt_vnodecovered) { + return __vpath(vp->v_mount->mnt_vnodecovered, + str, len, depth + 1); + } + return str + len; + } + + src = vp->v_name; + vnm_len = strlen(src); + if (vnm_len > len) { + /* truncate the name to fit in the string */ + src += (vnm_len - len); + vnm_len = len; + } + + /* start from the back and copy just characters (no NULLs) */ + + /* this will chop off leaf path (file) names */ + if (depth > 0) { + dst = str + len - vnm_len; + memcpy(dst, src, vnm_len); + len -= vnm_len; + } else { + dst = str + len; + } + + if (vp->v_parent && len > 1) { + /* follow parents up the chain */ + len--; + *(dst - 1) = '/'; + return __vpath(vp->v_parent, str, len, depth + 1); + } + + return dst; +} + +#define SANE_VNODE_PRINT_LIMIT 5000 +void +panic_print_vnodes(void) +{ + mount_t mnt; + vnode_t vp; + int nvnodes = 0; + const char *type; + char *nm; + char vname[257]; + + paniclog_append_noflush("\n***** VNODES *****\n" + "TYPE UREF ICNT PATH\n"); + + /* NULL-terminate the path name */ + vname[sizeof(vname) - 1] = '\0'; + + /* + * iterate all vnodelist items in all mounts (mntlist) -> mnt_vnodelist + */ + TAILQ_FOREACH(mnt, &mountlist, mnt_list) { + if (!ml_validate_nofault((vm_offset_t)mnt, sizeof(mount_t))) { + paniclog_append_noflush("Unable to iterate the mount list %p - encountered an invalid mount pointer %p \n", + &mountlist, mnt); + break; + } + + TAILQ_FOREACH(vp, &mnt->mnt_vnodelist, v_mntvnodes) { + if (!ml_validate_nofault((vm_offset_t)vp, sizeof(vnode_t))) { + paniclog_append_noflush("Unable to iterate the vnode list %p - encountered an invalid vnode pointer %p \n", + &mnt->mnt_vnodelist, vp); + break; + } + + if (++nvnodes > SANE_VNODE_PRINT_LIMIT) { + return; + } + type = __vtype(vp->v_type); + nm = __vpath(vp, vname, sizeof(vname) - 1, 0); + paniclog_append_noflush("%s %0d %0d %s\n", + type, vp->v_usecount, vp->v_iocount, nm); + } + } +} + +#else /* !PANIC_PRINTS_VNODES */ +void +panic_print_vnodes(void) +{ + return; +} +#endif + + #ifdef JOE_DEBUG -static void record_vp(vnode_t vp, int count) { - struct uthread *ut; +static void +record_vp(vnode_t vp, int count) +{ + struct uthread *ut; #if CONFIG_TRIGGERS - if (vp->v_resolve) + if (vp->v_resolve) { return; + } #endif - if ((vp->v_flag & VSYSTEM)) - return; + if ((vp->v_flag & VSYSTEM)) { + return; + } ut = get_bsdthread_info(current_thread()); - ut->uu_iocount += count; + ut->uu_iocount += count; if (count == 1) { if (ut->uu_vpindex < 32) { @@ -7850,16 +9898,16 @@ vfs_resolver_result(uint32_t seq, enum resolver_status stat, int aux) * |<--- 32 --->|<--- 28 --->|<- 4 ->| * sequence auxiliary status */ - return (((uint64_t)seq) << 32) | - (((uint64_t)(aux & 0x0fffffff)) << 4) | - (uint64_t)(stat & 0x0000000F); + return (((uint64_t)seq) << 32) | + (((uint64_t)(aux & 0x0fffffff)) << 4) | + (uint64_t)(stat & 0x0000000F); } enum resolver_status vfs_resolver_status(resolver_result_t result) { /* lower 4 bits is status */ - return (result & 0x0000000F); + return result & 0x0000000F; } uint32_t @@ -7888,31 +9936,32 @@ vnode_trigger_update(vnode_t vp, resolver_result_t result) enum resolver_status stat; if (vp->v_resolve == NULL) { - return (EINVAL); + return EINVAL; } stat = vfs_resolver_status(result); seq = vfs_resolver_sequence(result); if ((stat != RESOLVER_RESOLVED) && (stat != RESOLVER_UNRESOLVED)) { - return (EINVAL); + return EINVAL; } rp = vp->v_resolve; lck_mtx_lock(&rp->vr_lock); if (seq > rp->vr_lastseq) { - if (stat == RESOLVER_RESOLVED) + if (stat == RESOLVER_RESOLVED) { rp->vr_flags |= VNT_RESOLVED; - else + } else { rp->vr_flags &= ~VNT_RESOLVED; + } rp->vr_lastseq = seq; } lck_mtx_unlock(&rp->vr_lock); - return (0); + return 0; } static int @@ -7928,7 +9977,7 @@ vnode_resolver_attach(vnode_t vp, vnode_resolve_t rp, boolean_t ref) vp->v_resolve = rp; } vnode_unlock(vp); - + if (ref) { error = vnode_ref_ext(vp, O_EVTONLY, VNODE_REF_FORCE); if (error != 0) { @@ -7954,12 +10003,14 @@ vnode_resolver_create(mount_t mp, vnode_t vp, struct vnode_trigger_param *tinfo, #if 1 /* minimum pointer test (debugging) */ - if (tinfo->vnt_data) + if (tinfo->vnt_data) { byte = *((char *)tinfo->vnt_data); + } #endif MALLOC(rp, vnode_resolve_t, sizeof(*rp), M_TEMP, M_WAITOK); - if (rp == NULL) - return (ENOMEM); + if (rp == NULL) { + return ENOMEM; + } lck_mtx_init(&rp->vr_lock, trigger_vnode_lck_grp, trigger_vnode_lck_attr); @@ -7983,7 +10034,7 @@ vnode_resolver_create(mount_t mp, vnode_t vp, struct vnode_trigger_param *tinfo, OSAddAtomic(1, &mp->mnt_numtriggers); } - return (result); + return result; out: FREE(rp, M_TEMP); @@ -8002,7 +10053,6 @@ vnode_resolver_release(vnode_resolve_t rp) lck_mtx_destroy(&rp->vr_lock, trigger_vnode_lck_grp); FREE(rp, M_TEMP); - } /* Called after the vnode has been drained */ @@ -8010,7 +10060,7 @@ static void vnode_resolver_detach(vnode_t vp) { vnode_resolve_t rp; - mount_t mp; + mount_t mp; mp = vnode_mount(vp); @@ -8021,32 +10071,12 @@ vnode_resolver_detach(vnode_t vp) if ((rp->vr_flags & VNT_EXTERNAL) != 0) { vnode_rele_ext(vp, O_EVTONLY, 1); - } + } vnode_resolver_release(rp); - - /* Keep count of active trigger vnodes per mount */ - OSAddAtomic(-1, &mp->mnt_numtriggers); -} -/* - * Pathname operations that don't trigger a mount for trigger vnodes - */ -static const u_int64_t ignorable_pathops_mask = - 1LL << OP_MOUNT | - 1LL << OP_UNMOUNT | - 1LL << OP_STATFS | - 1LL << OP_ACCESS | - 1LL << OP_GETATTR | - 1LL << OP_LISTXATTR; - -int -vfs_istraditionaltrigger(enum path_operation op, const struct componentname *cnp) -{ - if (cnp->cn_flags & ISLASTCN) - return ((1LL << op) & ignorable_pathops_mask) == 0; - else - return (1); + /* Keep count of active trigger vnodes per mount */ + OSAddAtomic(-1, &mp->mnt_numtriggers); } __private_extern__ @@ -8089,8 +10119,9 @@ vnode_trigger_rearm(vnode_t vp, vfs_context_t ctx) lck_mtx_lock(&rp->vr_lock); if (seq > rp->vr_lastseq) { - if (status == RESOLVER_UNRESOLVED) + if (status == RESOLVER_UNRESOLVED) { rp->vr_flags &= ~VNT_RESOLVED; + } rp->vr_lastseq = seq; } lck_mtx_unlock(&rp->vr_lock); @@ -8110,7 +10141,7 @@ vnode_trigger_resolve(vnode_t vp, struct nameidata *ndp, vfs_context_t ctx) if ((vp->v_resolve == NULL) || (vp->v_resolve->vr_resolve_func == NULL) || (vp->v_mountedhere != NULL)) { - return (0); + return 0; } rp = vp->v_resolve; @@ -8119,11 +10150,25 @@ vnode_trigger_resolve(vnode_t vp, struct nameidata *ndp, vfs_context_t ctx) /* Check if this vnode is already resolved */ if (rp->vr_flags & VNT_RESOLVED) { lck_mtx_unlock(&rp->vr_lock); - return (0); + return 0; } lck_mtx_unlock(&rp->vr_lock); +#if CONFIG_MACF + if ((rp->vr_flags & VNT_KERN_RESOLVE) == 0) { + /* + * VNT_KERN_RESOLVE indicates this trigger has no parameters + * at the discression of the accessing process other than + * the act of access. All other triggers must be checked + */ + int rv = mac_vnode_check_trigger_resolve(ctx, vp, &ndp->ni_cnd); + if (rv != 0) { + return rv; + } + } +#endif + /* * XXX * assumes that resolver will not access this trigger vnode (otherwise the kernel will deadlock) @@ -8131,7 +10176,7 @@ vnode_trigger_resolve(vnode_t vp, struct nameidata *ndp, vfs_context_t ctx) * there can also be other legitimate lookups in parallel * * XXX - should we call this on a separate thread with a timeout? - * + * * XXX - should we use ISLASTCN to pick the op value??? Perhaps only leafs should * get the richer set and non-leafs should get generic OP_LOOKUP? TBD */ @@ -8143,14 +10188,15 @@ vnode_trigger_resolve(vnode_t vp, struct nameidata *ndp, vfs_context_t ctx) lck_mtx_lock(&rp->vr_lock); if (seq > rp->vr_lastseq) { - if (status == RESOLVER_RESOLVED) + if (status == RESOLVER_RESOLVED) { rp->vr_flags |= VNT_RESOLVED; + } rp->vr_lastseq = seq; } lck_mtx_unlock(&rp->vr_lock); /* On resolver errors, propagate the error back up */ - return (status == RESOLVER_ERROR ? vfs_resolver_auxiliary(result) : 0); + return status == RESOLVER_ERROR ? vfs_resolver_auxiliary(result) : 0; } static int @@ -8162,7 +10208,7 @@ vnode_trigger_unresolve(vnode_t vp, int flags, vfs_context_t ctx) uint32_t seq; if ((vp->v_resolve == NULL) || (vp->v_resolve->vr_unresolve_func == NULL)) { - return (0); + return 0; } rp = vp->v_resolve; @@ -8172,7 +10218,7 @@ vnode_trigger_unresolve(vnode_t vp, int flags, vfs_context_t ctx) if ((rp->vr_flags & VNT_RESOLVED) == 0) { printf("vnode_trigger_unresolve: not currently resolved\n"); lck_mtx_unlock(&rp->vr_lock); - return (0); + return 0; } rp->vr_flags |= VNT_VFS_UNMOUNTED; @@ -8193,15 +10239,16 @@ vnode_trigger_unresolve(vnode_t vp, int flags, vfs_context_t ctx) lck_mtx_lock(&rp->vr_lock); if (seq > rp->vr_lastseq) { - if (status == RESOLVER_UNRESOLVED) + if (status == RESOLVER_UNRESOLVED) { rp->vr_flags &= ~VNT_RESOLVED; + } rp->vr_lastseq = seq; } rp->vr_flags &= ~VNT_VFS_UNMOUNTED; lck_mtx_unlock(&rp->vr_lock); /* On resolver errors, propagate the error back up */ - return (status == RESOLVER_ERROR ? vfs_resolver_auxiliary(result) : 0); + return status == RESOLVER_ERROR ? vfs_resolver_auxiliary(result) : 0; } static int @@ -8218,12 +10265,14 @@ triggerisdescendant(mount_t mp, mount_t rmp) vnode_t vp; /* did we encounter "/" ? */ - if (mp->mnt_flag & MNT_ROOTFS) + if (mp->mnt_flag & MNT_ROOTFS) { break; + } vp = mp->mnt_vnodecovered; - if (vp == NULLVP) + if (vp == NULLVP) { break; + } mp = vp->v_mount; if (mp == rmp) { @@ -8234,16 +10283,16 @@ triggerisdescendant(mount_t mp, mount_t rmp) name_cache_unlock(); - return (match); + return match; } struct trigger_unmount_info { - vfs_context_t ctx; - mount_t top_mp; - vnode_t trigger_vp; - mount_t trigger_mp; - uint32_t trigger_vid; - int flags; + vfs_context_t ctx; + mount_t top_mp; + vnode_t trigger_vp; + mount_t trigger_mp; + uint32_t trigger_vid; + int flags; }; static int @@ -8255,12 +10304,13 @@ trigger_unmount_callback(mount_t mp, void * arg) /* * When we encounter the top level mount we're done */ - if (mp == infop->top_mp) - return (VFS_RETURNED_DONE); + if (mp == infop->top_mp) { + return VFS_RETURNED_DONE; + } if ((mp->mnt_vnodecovered == NULL) || (vnode_getwithref(mp->mnt_vnodecovered) != 0)) { - return (VFS_RETURNED); + return VFS_RETURNED; } if ((mp->mnt_vnodecovered->v_mountedhere == mp) && @@ -8273,8 +10323,9 @@ trigger_unmount_callback(mount_t mp, void * arg) /* * When we encounter a mounted trigger, check if its under the top level mount */ - if ( !mountedtrigger || !triggerisdescendant(mp, infop->top_mp) ) - return (VFS_RETURNED); + if (!mountedtrigger || !triggerisdescendant(mp, infop->top_mp)) { + return VFS_RETURNED; + } /* * Process any pending nested mount (now that its not referenced) @@ -8285,17 +10336,17 @@ trigger_unmount_callback(mount_t mp, void * arg) int error; infop->trigger_vp = NULLVP; - + if (mp == vp->v_mountedhere) { vnode_put(vp); printf("trigger_unmount_callback: unexpected match '%s'\n", - mp->mnt_vfsstat.f_mntonname); - return (VFS_RETURNED); + mp->mnt_vfsstat.f_mntonname); + return VFS_RETURNED; } if (infop->trigger_mp != vp->v_mountedhere) { vnode_put(vp); printf("trigger_unmount_callback: trigger mnt changed! (%p != %p)\n", - infop->trigger_mp, vp->v_mountedhere); + infop->trigger_mp, vp->v_mountedhere); goto savenext; } @@ -8303,9 +10354,9 @@ trigger_unmount_callback(mount_t mp, void * arg) vnode_put(vp); if (error) { printf("unresolving: '%s', err %d\n", - vp->v_mountedhere ? vp->v_mountedhere->mnt_vfsstat.f_mntonname : - "???", error); - return (VFS_RETURNED_DONE); /* stop iteration on errors */ + vp->v_mountedhere ? vp->v_mountedhere->mnt_vfsstat.f_mntonname : + "???", error); + return VFS_RETURNED_DONE; /* stop iteration on errors */ } } savenext: @@ -8323,7 +10374,7 @@ savenext: vnode_put(infop->trigger_vp); } - return (VFS_RETURNED); + return VFS_RETURNED; } /* @@ -8353,8 +10404,9 @@ vfs_nested_trigger_unmounts(mount_t mp, int flags, vfs_context_t ctx) recursive = TRUE; } vnode_put(mp->mnt_vnodecovered); - if (recursive) + if (recursive) { return; + } } /* @@ -8390,16 +10442,16 @@ vfs_addtrigger(mount_t mp, const char *relpath, struct vnode_trigger_info *vtip, int res; vnode_t rvp, vp; struct vnode_trigger_param vtp; - - /* - * Must be called for trigger callback, wherein rwlock is held + + /* + * Must be called for trigger callback, wherein rwlock is held */ lck_rw_assert(&mp->mnt_rwlock, LCK_RW_ASSERT_HELD); TRIG_LOG("Adding trigger at %s\n", relpath); TRIG_LOG("Trying VFS_ROOT\n"); - /* + /* * We do a lookup starting at the root of the mountpoint, unwilling * to cross into other mountpoints. */ @@ -8411,21 +10463,21 @@ vfs_addtrigger(mount_t mp, const char *relpath, struct vnode_trigger_info *vtip, TRIG_LOG("Trying namei\n"); NDINIT(&nd, LOOKUP, OP_LOOKUP, USEDVP | NOCROSSMOUNT | FOLLOW, UIO_SYSSPACE, - CAST_USER_ADDR_T(relpath), ctx); + CAST_USER_ADDR_T(relpath), ctx); nd.ni_dvp = rvp; res = namei(&nd); if (res != 0) { vnode_put(rvp); goto out; } - + vp = nd.ni_vp; nameidone(&nd); vnode_put(rvp); TRIG_LOG("Trying vnode_resolver_create()\n"); - /* + /* * Set up blob. vnode_create() takes a larger structure * with creation info, and we needed something different * for this case. One needs to win, or we need to munge both; @@ -8448,3 +10500,91 @@ out: } #endif /* CONFIG_TRIGGERS */ + +vm_offset_t +kdebug_vnode(vnode_t vp) +{ + return VM_KERNEL_ADDRPERM(vp); +} + +static int flush_cache_on_write = 0; +SYSCTL_INT(_kern, OID_AUTO, flush_cache_on_write, + CTLFLAG_RW | CTLFLAG_LOCKED, &flush_cache_on_write, 0, + "always flush the drive cache on writes to uncached files"); + +int +vnode_should_flush_after_write(vnode_t vp, int ioflag) +{ + return flush_cache_on_write + && (ISSET(ioflag, IO_NOCACHE) || vnode_isnocache(vp)); +} + +/* + * sysctl for use by disk I/O tracing tools to get the list of existing + * vnodes' paths + */ + +struct vnode_trace_paths_context { + uint64_t count; + long path[MAXPATHLEN / sizeof(long) + 1]; /* + 1 in case sizeof (long) does not divide MAXPATHLEN */ +}; + +static int +vnode_trace_path_callback(struct vnode *vp, void *arg) +{ + int len, rv; + struct vnode_trace_paths_context *ctx; + + ctx = arg; + + len = sizeof(ctx->path); + rv = vn_getpath(vp, (char *)ctx->path, &len); + /* vn_getpath() NUL-terminates, and len includes the NUL */ + + if (!rv) { + kdebug_vfs_lookup(ctx->path, len, vp, + KDBG_VFS_LOOKUP_FLAG_LOOKUP | KDBG_VFS_LOOKUP_FLAG_NOPROCFILT); + + if (++(ctx->count) == 1000) { + thread_yield_to_preemption(); + ctx->count = 0; + } + } + + return VNODE_RETURNED; +} + +static int +vfs_trace_paths_callback(mount_t mp, void *arg) +{ + if (mp->mnt_flag & MNT_LOCAL) { + vnode_iterate(mp, VNODE_ITERATE_ALL, vnode_trace_path_callback, arg); + } + + return VFS_RETURNED; +} + +static int sysctl_vfs_trace_paths SYSCTL_HANDLER_ARGS { + struct vnode_trace_paths_context ctx; + + (void)oidp; + (void)arg1; + (void)arg2; + (void)req; + + if (!kauth_cred_issuser(kauth_cred_get())) { + return EPERM; + } + + if (!kdebug_enable || !kdebug_debugid_enabled(VFS_LOOKUP)) { + return EINVAL; + } + + bzero(&ctx, sizeof(struct vnode_trace_paths_context)); + + vfs_iterate(0, vfs_trace_paths_callback, &ctx); + + return 0; +} + +SYSCTL_PROC(_vfs_generic, OID_AUTO, trace_paths, CTLFLAG_RD | CTLFLAG_LOCKED | CTLFLAG_MASKED, NULL, 0, &sysctl_vfs_trace_paths, "-", "trace_paths");