/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999-2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* File: ubc_subr.c
*
* Functions related to Unified Buffer cache.
*
+ * Caller of UBC functions MUST have a valid reference on the vnode.
+ *
*/
+#undef DIAGNOSTIC
#define DIAGNOSTIC 1
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/lock.h>
-#include <sys/ubc.h>
-#include <sys/mount.h>
-#include <sys/vnode.h>
-#include <sys/ubc.h>
+#include <sys/mman.h>
+#include <sys/mount_internal.h>
+#include <sys/vnode_internal.h>
+#include <sys/ubc_internal.h>
#include <sys/ucred.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <sys/buf.h>
+#include <sys/user.h>
#include <mach/mach_types.h>
#include <mach/memory_object_types.h>
+#include <mach/memory_object_control.h>
+#include <mach/vm_map.h>
+#include <mach/upl.h>
+#include <kern/kern_types.h>
#include <kern/zalloc.h>
+#include <kern/thread.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_protos.h> /* last */
#if DIAGNOSTIC
#if defined(assert)
#undef assert()
#endif
#define assert(cond) \
- if (!(cond)) panic("%s:%d (%s)", __FILE__, __LINE__, # cond)
+ ((void) ((cond) ? 0 : panic("%s:%d (%s)", __FILE__, __LINE__, # cond)))
#else
#include <kern/assert.h>
#endif /* DIAGNOSTIC */
-struct zone *ubc_info_zone;
-
-#if DIAGNOSTIC
-#define USHOULDNOT(fun) panic("%s: should not", (fun));
-#else
-#define USHOULDNOT(fun)
-#endif /* DIAGNOSTIC */
-
-
-static void *_ubc_getobject(struct vnode *, int);
-static void ubc_lock(struct vnode *);
-static void ubc_unlock(struct vnode *);
-
-static void
-ubc_getobjref(struct vnode *vp)
-{
- register struct ubc_info *uip;
- void *pager_cport;
- void *object;
-
- uip = vp->v_ubcinfo;
+int ubc_info_init_internal(struct vnode *vp, int withfsize, off_t filesize);
+static int ubc_umcallback(vnode_t, void *);
+int ubc_isinuse_locked(vnode_t, int, int);
+static int ubc_msync_internal(vnode_t, off_t, off_t, off_t *, int, int *);
- if (pager_cport = (void *)vnode_pager_lookup(vp, uip->ui_pager))
- object = (void *)vm_object_lookup(pager_cport);
-
- if (object != uip->ui_object) {
-#if 0
- Debugger("ubc_getobjref: object changed");
-#endif /* 0 */
- uip->ui_object = object;
- }
-
- if (uip->ui_object == NULL)
- panic("ubc_getobjref: lost object");
-}
+struct zone *ubc_info_zone;
/*
* Initialization of the zone for Unified Buffer Cache.
*/
-void
+__private_extern__ void
ubc_init()
{
int i;
*/
int
ubc_info_init(struct vnode *vp)
+{
+ return(ubc_info_init_internal(vp, 0, 0));
+}
+int
+ubc_info_init_withsize(struct vnode *vp, off_t filesize)
+{
+ return(ubc_info_init_internal(vp, 1, filesize));
+}
+
+int
+ubc_info_init_internal(struct vnode *vp, int withfsize, off_t filesize)
{
register struct ubc_info *uip;
void * pager;
- struct vattr vattr;
struct proc *p = current_proc();
int error = 0;
kern_return_t kret;
- void * pager_cport;
+ memory_object_control_t control;
- assert(vp);
- assert(UBCISVALID(vp));
+ uip = vp->v_ubcinfo;
- ubc_lock(vp);
- if (ISSET(vp->v_flag, VUINIT)) {
- /*
- * other thread is already doing this
- * wait till done
- */
- while (ISSET(vp->v_flag, VUINIT)) {
- SET(vp->v_flag, VUWANT); /* XXX overloaded! */
- ubc_unlock(vp);
- (void) tsleep((caddr_t)vp, PINOD, "ubcinfo", 0);
- ubc_lock(vp);
- }
- ubc_unlock(vp);
- return (0);
- } else {
- SET(vp->v_flag, VUINIT);
- }
+ if (uip == UBC_INFO_NULL) {
- uip = vp->v_ubcinfo;
- if ((uip == UBC_INFO_NULL) || (uip == UBC_NOINFO)) {
- ubc_unlock(vp);
uip = (struct ubc_info *) zalloc(ubc_info_zone);
- bzero(uip, sizeof(struct ubc_info));
- ubc_lock(vp);
- SET(uip->ui_flags, UI_INITED);
+ bzero((char *)uip, sizeof(struct ubc_info));
+
uip->ui_vnode = vp;
+ uip->ui_flags = UI_INITED;
uip->ui_ucred = NOCRED;
}
+#if DIAGNOSTIC
+ else
+ Debugger("ubc_info_init: already");
+#endif /* DIAGNOSTIC */
assert(uip->ui_flags != UI_NONE);
assert(uip->ui_vnode == vp);
-#if 0
- if(ISSET(uip->ui_flags, UI_HASPAGER))
- goto done;
-#endif /* 0 */
-
/* now set this ubc_info in the vnode */
vp->v_ubcinfo = uip;
- SET(uip->ui_flags, UI_HASPAGER);
- ubc_unlock(vp);
+
pager = (void *)vnode_pager_setup(vp, uip->ui_pager);
assert(pager);
+ SET(uip->ui_flags, UI_HASPAGER);
+ uip->ui_pager = pager;
+
/*
- * Can not use VOP_GETATTR() to get accurate value
- * of ui_size. Thanks to NFS.
+ * Note: We can not use VNOP_GETATTR() to get accurate
+ * value of ui_size. Thanks to NFS.
* nfs_getattr() can call vinvalbuf() and in this case
* ubc_info is not set up to deal with that.
* So use bogus size.
*/
- /* create a vm_object association */
- kret = vm_object_create_nomap(pager, (vm_object_offset_t)uip->ui_size);
- if (kret != KERN_SUCCESS)
- panic("ubc_info_init: vm_object_create_nomap returned %d", kret);
-
- /* _ubc_getobject() gets a reference on the memory object */
- if (_ubc_getobject(vp, 0) == NULL)
- panic("ubc_info_init: lost vmobject : uip = 0X%08x", uip);
-
/*
- * vm_object_allocate() called from vm_object_create_nomap()
- * created the object with a refcount of 1
- * need to drop the reference gained by vm_object_lookup()
+ * create a vnode - vm_object association
+ * memory_object_create_named() creates a "named" reference on the
+ * memory object we hold this reference as long as the vnode is
+ * "alive." Since memory_object_create_named() took its own reference
+ * on the vnode pager we passed it, we can drop the reference
+ * vnode_pager_setup() returned here.
*/
- vm_object_deallocate(uip->ui_object);
+ kret = memory_object_create_named(pager,
+ (memory_object_size_t)uip->ui_size, &control);
+ vnode_pager_deallocate(pager);
+ if (kret != KERN_SUCCESS)
+ panic("ubc_info_init: memory_object_create_named returned %d", kret);
+ assert(control);
+ uip->ui_control = control; /* cache the value of the mo control */
+ SET(uip->ui_flags, UI_HASOBJREF); /* with a named reference */
+#if 0
/* create a pager reference on the vnode */
- error = vget(vp, LK_INTERLOCK, p);
+ error = vnode_pager_vget(vp);
if (error)
- panic("ubc_info_init: vget error = %d", error);
-
- /* initialize the size */
- error = VOP_GETATTR(vp, &vattr, p->p_ucred, p);
-
- ubc_lock(vp);
- uip->ui_size = (error ? 0: vattr.va_size);
-
-done:
- CLR(vp->v_flag, VUINIT);
- if (ISSET(vp->v_flag, VUWANT)) {
- CLR(vp->v_flag, VUWANT);
- ubc_unlock(vp);
- wakeup((caddr_t)vp);
- } else
- ubc_unlock(vp);
+ panic("ubc_info_init: vnode_pager_vget error = %d", error);
+#endif
+ if (withfsize == 0) {
+ struct vfs_context context;
+ /* initialize the size */
+ context.vc_proc = p;
+ context.vc_ucred = kauth_cred_get();
+ error = vnode_size(vp, &uip->ui_size, &context);
+ if (error)
+ uip->ui_size = 0;
+ } else {
+ uip->ui_size = filesize;
+ }
+ vp->v_lflag |= VNAMED_UBC;
- return(error);
+ return (error);
}
/* Free the ubc_info */
-void
-ubc_info_free(struct vnode *vp)
+static void
+ubc_info_free(struct ubc_info *uip)
{
- register struct ubc_info *uip;
- struct ucred *credp;
+ if (IS_VALID_CRED(uip->ui_ucred)) {
+ kauth_cred_unref(&uip->ui_ucred);
+ }
+
+ if (uip->ui_control != MEMORY_OBJECT_CONTROL_NULL)
+ memory_object_control_deallocate(uip->ui_control);
- assert(vp);
+ cluster_release(uip);
- uip = vp->v_ubcinfo;
- vp->v_ubcinfo = UBC_INFO_NULL;
- credp = uip->ui_ucred;
- if (credp != NOCRED) {
- uip->ui_ucred = NOCRED;
- crfree(credp);
- }
zfree(ubc_info_zone, (vm_offset_t)uip);
return;
}
+void
+ubc_info_deallocate(struct ubc_info *uip)
+{
+ ubc_info_free(uip);
+}
+
/*
* Communicate with VM the size change of the file
* returns 1 on success, 0 on failure
off_t osize; /* ui_size before change */
off_t lastpg, olastpgend, lastoff;
struct ubc_info *uip;
- void *object;
+ memory_object_control_t control;
kern_return_t kret;
- int didhold;
-#if DIAGNOSTIC
- assert(vp);
- assert(nsize >= (off_t)0);
-#endif
-
- if (UBCINVALID(vp))
- return(0);
+ if (nsize < (off_t)0)
+ return (0);
if (!UBCINFOEXISTS(vp))
- return(0);
+ return (0);
uip = vp->v_ubcinfo;
osize = uip->ui_size; /* call ubc_getsize() ??? */
uip->ui_size = nsize;
if (nsize >= osize) /* Nothing more to do */
- return(0);
+ return (1); /* return success */
/*
* When the file shrinks, invalidate the pages beyond the
* end of the file.
*/
- didhold = ubc_hold(vp);
lastpg = trunc_page_64(nsize);
olastpgend = round_page_64(osize);
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
+ control = uip->ui_control;
+ assert(control);
lastoff = (nsize & PAGE_MASK_64);
/*
* invalidating is sufficient
*/
if (!lastoff) {
- /*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
-
/* invalidate last page and old contents beyond nsize */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)lastpg,
- (memory_object_size_t)(olastpgend - lastpg),
- MEMORY_OBJECT_RETURN_NONE,TRUE,
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
+ kret = memory_object_lock_request(control,
+ (memory_object_offset_t)lastpg,
+ (memory_object_size_t)(olastpgend - lastpg), NULL, NULL,
+ MEMORY_OBJECT_RETURN_NONE, MEMORY_OBJECT_DATA_FLUSH,
+ VM_PROT_NO_CHANGE);
if (kret != KERN_SUCCESS)
printf("ubc_setsize: invalidate failed (error = %d)\n", kret);
- if (didhold)
- ubc_rele(vp);
return ((kret == KERN_SUCCESS) ? 1 : 0);
}
- /*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
-
/* flush the last page */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)lastpg,
- PAGE_SIZE_64,
- MEMORY_OBJECT_RETURN_DIRTY,FALSE,
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
+ kret = memory_object_lock_request(control,
+ (memory_object_offset_t)lastpg,
+ PAGE_SIZE_64, NULL, NULL,
+ MEMORY_OBJECT_RETURN_DIRTY, FALSE,
+ VM_PROT_NO_CHANGE);
if (kret == KERN_SUCCESS) {
- /*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
-
/* invalidate last page and old contents beyond nsize */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)lastpg,
- (memory_object_size_t)(olastpgend - lastpg),
- MEMORY_OBJECT_RETURN_NONE,TRUE,
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
+ kret = memory_object_lock_request(control,
+ (memory_object_offset_t)lastpg,
+ (memory_object_size_t)(olastpgend - lastpg), NULL, NULL,
+ MEMORY_OBJECT_RETURN_NONE, MEMORY_OBJECT_DATA_FLUSH,
+ VM_PROT_NO_CHANGE);
if (kret != KERN_SUCCESS)
printf("ubc_setsize: invalidate failed (error = %d)\n", kret);
} else
printf("ubc_setsize: flush failed (error = %d)\n", kret);
- if (didhold)
- ubc_rele(vp);
return ((kret == KERN_SUCCESS) ? 1 : 0);
}
/*
* Get the size of the file
- * For local file systems the size is locally cached. For NFS
- * there might be a network transaction for this.
*/
off_t
ubc_getsize(struct vnode *vp)
{
- /* XXX deal with NFS */
+ /* people depend on the side effect of this working this way
+ * as they call this for directory
+ */
+ if (!UBCINFOEXISTS(vp))
+ return ((off_t)0);
return (vp->v_ubcinfo->ui_size);
}
-/* lock for changes to struct UBC */
-static void
-ubc_lock(struct vnode *vp)
-{
- /* For now, just use the v_interlock */
- simple_lock(&vp->v_interlock);
-}
-
-/* unlock */
-static void
-ubc_unlock(struct vnode *vp)
-{
- /* For now, just use the v_interlock */
- simple_unlock(&vp->v_interlock);
-}
-
/*
- * Caller indicate that the object corresponding to the vnode
- * can not be cached in object cache. Make it so.
+ * call ubc_sync_range(vp, 0, EOF, UBC_PUSHALL) on all the vnodes
+ * for this mount point.
* returns 1 on success, 0 on failure
- *
- * Caller of ubc_uncache() MUST have a valid reference on the vnode.
*/
-int
-ubc_uncache(struct vnode *vp)
-{
- void *object;
- kern_return_t kret;
- struct ubc_info *uip;
- memory_object_perf_info_data_t perf;
- int didhold;
-
- assert(vp);
-
- if (!UBCINFOEXISTS(vp))
- return (0);
-
- uip = vp->v_ubcinfo;
- assert(uip != UBC_INFO_NULL);
-
- /*
- * AGE it so that vfree() can make sure that it
- * would get recycled soon after the last reference is gone
- * This will insure that .nfs turds would not linger
- */
- vagevp(vp);
-
- /* set the "do not cache" bit */
- SET(uip->ui_flags, UI_DONTCACHE);
-
- didhold = ubc_hold(vp);
-
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
+__private_extern__ int
+ubc_umount(struct mount *mp)
+{
+ vnode_iterate(mp, 0, ubc_umcallback, 0);
+ return(0);
+}
- /*
- * memory_object_change_attributes() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
+static int
+ubc_umcallback(vnode_t vp, __unused void * args)
+{
- perf.cluster_size = PAGE_SIZE; /* XXX use real cluster_size. */
- perf.may_cache = FALSE;
- kret = memory_object_change_attributes(object,
- MEMORY_OBJECT_PERFORMANCE_INFO,
- (memory_object_info_t) &perf,
- MEMORY_OBJECT_PERF_INFO_COUNT,
- MACH_PORT_NULL, 0);
+ if (UBCINFOEXISTS(vp)) {
- if (didhold)
- ubc_rele(vp);
+ cluster_push(vp, 0);
- if (kret != KERN_SUCCESS) {
-#if DIAGNOSTIC
- panic("ubc_uncache: memory_object_change_attributes "
- "kret = %d", kret);
-#endif /* DIAGNOSTIC */
- return (0);
+ (void) ubc_msync(vp, (off_t)0, ubc_getsize(vp), NULL, UBC_PUSHALL);
}
-
- return (1);
+ return (VNODE_RETURNED);
}
-/*
- * call ubc_clean() and ubc_uncache() on all the vnodes
- * for this mount point.
- * returns 1 on success, 0 on failure
- */
-int
-ubc_umount(struct mount *mp)
-{
- struct proc *p = current_proc();
- struct vnode *vp, *nvp;
- int ret = 1;
-
-loop:
- simple_lock(&mntvnode_slock);
- for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) {
- if (vp->v_mount != mp) {
- simple_unlock(&mntvnode_slock);
- goto loop;
- }
- nvp = vp->v_mntvnodes.le_next;
- simple_unlock(&mntvnode_slock);
- if (UBCINFOEXISTS(vp)) {
- ret &= ubc_clean(vp, 0); /* do not invalidate */
- ret &= ubc_uncache(vp);
- ubc_release(vp);
- }
- simple_lock(&mntvnode_slock);
- }
- simple_unlock(&mntvnode_slock);
- return (ret);
-}
-/*
- * Call ubc_unmount() for all filesystems.
- * The list is traversed in reverse order
- * of mounting to avoid dependencies.
- */
-void
-ubc_unmountall()
+/* Get the credentials */
+kauth_cred_t
+ubc_getcred(struct vnode *vp)
{
- struct mount *mp, *nmp;
+ if (UBCINFOEXISTS(vp))
+ return (vp->v_ubcinfo->ui_ucred);
- /*
- * Since this only runs when rebooting, it is not interlocked.
- */
- for (mp = mountlist.cqh_last; mp != (void *)&mountlist; mp = nmp) {
- nmp = mp->mnt_list.cqe_prev;
- (void) ubc_umount(mp);
- }
+ return (NOCRED);
}
-/* Get the credentials */
-struct ucred *
-ubc_getcred(struct vnode *vp)
+int
+ubc_setthreadcred(struct vnode *vp, struct proc *p, thread_t thread)
{
struct ubc_info *uip;
+ kauth_cred_t credp;
+ struct uthread *uthread = get_bsdthread_info(thread);
- assert(vp);
+ if (!UBCINFOEXISTS(vp))
+ return (1);
- uip = vp->v_ubcinfo;
+ vnode_lock(vp);
- assert(uip);
+ uip = vp->v_ubcinfo;
+ credp = uip->ui_ucred;
- if (UBCINVALID(vp)) {
- return (NOCRED);
+ if (!IS_VALID_CRED(credp)) {
+ /* use per-thread cred, if assumed identity, else proc cred */
+ if (uthread == NULL || (uthread->uu_flag & UT_SETUID) == 0) {
+ uip->ui_ucred = kauth_cred_proc_ref(p);
+ } else {
+ uip->ui_ucred = uthread->uu_ucred;
+ kauth_cred_ref(uip->ui_ucred);
+ }
}
+ vnode_unlock(vp);
- return (uip->ui_ucred);
+ return (0);
}
/*
* existing credentials are not changed
* returns 1 on success and 0 on failure
*/
-
int
ubc_setcred(struct vnode *vp, struct proc *p)
{
struct ubc_info *uip;
- struct ucred *credp;
-
- assert(vp);
- assert(p);
-
- uip = vp->v_ubcinfo;
-
- assert(uip);
+ kauth_cred_t credp;
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_setcred");
+ if ( !UBCINFOEXISTS(vp))
return (0);
- }
+ vnode_lock(vp);
+
+ uip = vp->v_ubcinfo;
credp = uip->ui_ucred;
- if (credp == NOCRED) {
- crhold(p->p_ucred);
- uip->ui_ucred = p->p_ucred;
+
+ if (!IS_VALID_CRED(credp)) {
+ uip->ui_ucred = kauth_cred_proc_ref(p);
}
+ vnode_unlock(vp);
return (1);
}
/* Get the pager */
-void *
+__private_extern__ memory_object_t
ubc_getpager(struct vnode *vp)
{
- struct ubc_info *uip;
-
- assert(vp);
-
- uip = vp->v_ubcinfo;
-
- assert(uip);
+ if (UBCINFOEXISTS(vp))
+ return (vp->v_ubcinfo->ui_pager);
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_getpager");
- return (0);
- }
-
- return (uip->ui_pager);
+ return (0);
}
/*
* Get the memory object associated with this vnode
* If the vnode was reactivated, memory object would not exist.
* Unless "do not rectivate" was specified, look it up using the pager.
- * The vm_object_lookup() would create a reference on the memory object.
* If hold was requested create an object reference of one does not
* exist already.
*/
-static void *
-_ubc_getobject(struct vnode *vp, int flags)
+memory_object_control_t
+ubc_getobject(struct vnode *vp, __unused int flags)
{
- struct ubc_info *uip;
- void *object;
-
- uip = vp->v_ubcinfo;
- object = uip->ui_object;
+ if (UBCINFOEXISTS(vp))
+ return((vp->v_ubcinfo->ui_control));
- if ((object == NULL) && ISSET(uip->ui_flags, UI_HASPAGER)
- && !(flags & UBC_NOREACTIVATE)) {
- void *pager_cport;
+ return (0);
+}
- if (ISSET(uip->ui_flags, UI_HASOBJREF))
- panic("ubc_getobject: lost object");
- if (pager_cport = (void *)vnode_pager_lookup(vp, uip->ui_pager)) {
- object = (void *)vm_object_lookup(pager_cport);
-#if 0
- if ((uip->ui_object) && (uip->ui_object != object))
- Debugger("_ubc_getobject: object changed");
-#endif /* 0 */
+off_t
+ubc_blktooff(vnode_t vp, daddr64_t blkno)
+{
+ off_t file_offset;
+ int error;
- uip->ui_object = object;
- }
+ if (UBCINVALID(vp))
+ return ((off_t)-1);
- if (object != NULL)
- SET(uip->ui_flags, UI_HASOBJREF);
- }
+ error = VNOP_BLKTOOFF(vp, blkno, &file_offset);
+ if (error)
+ file_offset = -1;
- if ((flags & UBC_HOLDOBJECT)
- && (object != NULL)) {
- if (!ISSET(uip->ui_flags, UI_HASOBJREF)) {
- ubc_getobjref(vp);
- SET(uip->ui_flags, UI_HASOBJREF);
- }
- }
- return (uip->ui_object);
+ return (file_offset);
}
-void *
-ubc_getobject(struct vnode *vp, int flags)
+daddr64_t
+ubc_offtoblk(vnode_t vp, off_t offset)
{
- struct ubc_info *uip;
- void *object;
-
- assert(vp);
- uip = vp->v_ubcinfo;
- assert(uip);
+ daddr64_t blkno;
+ int error = 0;
- if (UBCINVALID(vp)) {
- return (0);
- }
+ if (UBCINVALID(vp))
+ return ((daddr64_t)-1);
- object = _ubc_getobject(vp, flags);
- assert(object);
+ error = VNOP_OFFTOBLK(vp, offset, &blkno);
+ if (error)
+ blkno = -1;
- if (!ISSET(uip->ui_flags, (UI_HASOBJREF|UI_WASMAPPED))
- && !(uip->ui_holdcnt)) {
- if (!(flags & UBC_PAGINGOP))
- panic("ubc_getobject: lost reference");
- }
+ return (blkno);
}
-/* Set the pager */
int
-ubc_setpager(struct vnode *vp, void *pager)
+ubc_pages_resident(vnode_t vp)
{
- struct ubc_info *uip;
-
- assert(vp);
-
- uip = vp->v_ubcinfo;
+ kern_return_t kret;
+ boolean_t has_pages_resident;
+
+ if ( !UBCINFOEXISTS(vp))
+ return (0);
+
+ kret = memory_object_pages_resident(vp->v_ubcinfo->ui_control, &has_pages_resident);
+
+ if (kret != KERN_SUCCESS)
+ return (0);
+
+ if (has_pages_resident == TRUE)
+ return (1);
+
+ return (0);
+}
- assert(uip);
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_setpager");
- return (0);
- }
- uip->ui_pager = pager;
- return (1);
+/*
+ * This interface will eventually be deprecated
+ *
+ * clean and/or invalidate a range in the memory object that backs this
+ * vnode. The start offset is truncated to the page boundary and the
+ * size is adjusted to include the last page in the range.
+ *
+ * returns 1 for success, 0 for failure
+ */
+int
+ubc_sync_range(vnode_t vp, off_t beg_off, off_t end_off, int flags)
+{
+ return (ubc_msync_internal(vp, beg_off, end_off, NULL, flags, NULL));
}
-int
-ubc_setflags(struct vnode * vp, int flags)
-{
- struct ubc_info *uip;
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_setflags");
- return (EINVAL);
- }
+/*
+ * clean and/or invalidate a range in the memory object that backs this
+ * vnode. The start offset is truncated to the page boundary and the
+ * size is adjusted to include the last page in the range.
+ * if a
+ */
+errno_t
+ubc_msync(vnode_t vp, off_t beg_off, off_t end_off, off_t *resid_off, int flags)
+{
+ int retval;
+ int io_errno = 0;
+
+ if (resid_off)
+ *resid_off = beg_off;
- assert(vp);
+ retval = ubc_msync_internal(vp, beg_off, end_off, resid_off, flags, &io_errno);
- uip = vp->v_ubcinfo;
-
- assert(uip);
+ if (retval == 0 && io_errno == 0)
+ return (EINVAL);
+ return (io_errno);
+}
- SET(uip->ui_flags, flags);
- return(0);
-}
-int
-ubc_clearflags(struct vnode * vp, int flags)
+/*
+ * clean and/or invalidate a range in the memory object that backs this
+ * vnode. The start offset is truncated to the page boundary and the
+ * size is adjusted to include the last page in the range.
+ */
+static int
+ubc_msync_internal(vnode_t vp, off_t beg_off, off_t end_off, off_t *resid_off, int flags, int *io_errno)
{
- struct ubc_info *uip;
-
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_clearflags");
- return (EINVAL);
- }
+ memory_object_size_t tsize;
+ kern_return_t kret;
+ int request_flags = 0;
+ int flush_flags = MEMORY_OBJECT_RETURN_NONE;
+
+ if ( !UBCINFOEXISTS(vp))
+ return (0);
+ if (end_off <= beg_off)
+ return (0);
+ if ((flags & (UBC_INVALIDATE | UBC_PUSHDIRTY | UBC_PUSHALL)) == 0)
+ return (0);
+
+ if (flags & UBC_INVALIDATE)
+ /*
+ * discard the resident pages
+ */
+ request_flags = (MEMORY_OBJECT_DATA_FLUSH | MEMORY_OBJECT_DATA_NO_CHANGE);
- assert(vp);
+ if (flags & UBC_SYNC)
+ /*
+ * wait for all the I/O to complete before returning
+ */
+ request_flags |= MEMORY_OBJECT_IO_SYNC;
- uip = vp->v_ubcinfo;
+ if (flags & UBC_PUSHDIRTY)
+ /*
+ * we only return the dirty pages in the range
+ */
+ flush_flags = MEMORY_OBJECT_RETURN_DIRTY;
- assert(uip);
+ if (flags & UBC_PUSHALL)
+ /*
+ * then return all the interesting pages in the range (both dirty and precious)
+ * to the pager
+ */
+ flush_flags = MEMORY_OBJECT_RETURN_ALL;
- CLR(uip->ui_flags, flags);
+ beg_off = trunc_page_64(beg_off);
+ end_off = round_page_64(end_off);
+ tsize = (memory_object_size_t)end_off - beg_off;
- return(0);
-}
+ /* flush and/or invalidate pages in the range requested */
+ kret = memory_object_lock_request(vp->v_ubcinfo->ui_control,
+ beg_off, tsize, resid_off, io_errno,
+ flush_flags, request_flags, VM_PROT_NO_CHANGE);
+
+ return ((kret == KERN_SUCCESS) ? 1 : 0);
+}
-int
-ubc_issetflags(struct vnode * vp, int flags)
+/*
+ * The vnode is mapped explicitly, mark it so.
+ */
+__private_extern__ int
+ubc_map(vnode_t vp, int flags)
{
struct ubc_info *uip;
+ int error = 0;
+ int need_ref = 0;
+ struct vfs_context context;
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_issetflags");
- return (EINVAL);
- }
-
- assert(vp);
-
- uip = vp->v_ubcinfo;
-
- assert(uip);
-
- return(ISSET(uip->ui_flags, flags));
-}
+ if (vnode_getwithref(vp))
+ return (0);
-off_t
-ubc_blktooff(struct vnode *vp, daddr_t blkno)
-{
- off_t file_offset;
- int error;
+ if (UBCINFOEXISTS(vp)) {
+ context.vc_proc = current_proc();
+ context.vc_ucred = kauth_cred_get();
- assert(vp);
- if (UBCINVALID(vp)) {
- USHOULDNOT("ubc_blktooff");
- return ((off_t)-1);
- }
+ error = VNOP_MMAP(vp, flags, &context);
- error = VOP_BLKTOOFF(vp, blkno, &file_offset);
- if (error)
- file_offset = -1;
+ if (error != EPERM)
+ error = 0;
- return (file_offset);
-}
-daddr_t
-ubc_offtoblk(struct vnode *vp, off_t offset)
-{
- daddr_t blkno;
- int error=0;
+ if (error == 0) {
+ vnode_lock(vp);
+
+ uip = vp->v_ubcinfo;
- assert(vp);
- if (UBCINVALID(vp)) {
- return ((daddr_t)-1);
- }
+ if ( !ISSET(uip->ui_flags, UI_ISMAPPED))
+ need_ref = 1;
+ SET(uip->ui_flags, (UI_WASMAPPED | UI_ISMAPPED));
- error = VOP_OFFTOBLK(vp, offset, &blkno);
- if (error)
- blkno = -1;
+ vnode_unlock(vp);
+
+ if (need_ref)
+ vnode_ref(vp);
+ }
+ }
+ vnode_put(vp);
- return (blkno);
+ return (error);
}
/*
- * Cause the file data in VM to be pushed out to the storage
- * it also causes all currently valid pages to be released
- * returns 1 on success, 0 on failure
+ * destroy the named reference for a given vnode
*/
-int
-ubc_clean(struct vnode *vp, int invalidate)
+__private_extern__ int
+ubc_destroy_named(struct vnode *vp)
{
- off_t size;
+ memory_object_control_t control;
struct ubc_info *uip;
- void *object;
kern_return_t kret;
- int flags = 0;
- int didhold;
-
-#if DIAGNOSTIC
- assert(vp);
-#endif
-
- if (UBCINVALID(vp))
- return(0);
-
- if (!UBCINFOEXISTS(vp))
- return(0);
/*
- * if invalidate was requested, write dirty data and then discard
- * the resident pages
+ * We may already have had the object terminated
+ * and the ubcinfo released as a side effect of
+ * some earlier processing. If so, pretend we did
+ * it, because it probably was a result of our
+ * efforts.
*/
- if (invalidate)
- flags = (MEMORY_OBJECT_DATA_FLUSH | MEMORY_OBJECT_DATA_NO_CHANGE);
+ if (!UBCINFOEXISTS(vp))
+ return (1);
- didhold = ubc_hold(vp);
uip = vp->v_ubcinfo;
- size = uip->ui_size; /* call ubc_getsize() ??? */
-
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
/*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
+ * Terminate the memory object.
+ * memory_object_destroy() will result in
+ * vnode_pager_no_senders().
+ * That will release the pager reference
+ * and the vnode will move to the free list.
*/
- ubc_getobjref(vp);
+ control = ubc_getobject(vp, UBC_HOLDOBJECT);
+ if (control != MEMORY_OBJECT_CONTROL_NULL) {
- vp->v_flag &= ~VHASDIRTY;
- vp->v_clen = 0;
+ /*
+ * XXXXX - should we hold the vnode lock here?
+ */
+ if (ISSET(vp->v_flag, VTERMINATE))
+ panic("ubc_destroy_named: already teminating");
+ SET(vp->v_flag, VTERMINATE);
- /* Write the dirty data in the file and discard cached pages */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)0,
- (memory_object_size_t)round_page_64(size),
- MEMORY_OBJECT_RETURN_ALL, flags,
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
+ kret = memory_object_destroy(control, 0);
+ if (kret != KERN_SUCCESS)
+ return (0);
- if (kret != KERN_SUCCESS) {
- printf("ubc_clean: clean failed (error = %d)\n", kret);
+ /*
+ * memory_object_destroy() is asynchronous
+ * with respect to vnode_pager_no_senders().
+ * wait for vnode_pager_no_senders() to clear
+ * VTERMINATE
+ */
+ vnode_lock(vp);
+ while (ISSET(vp->v_lflag, VNAMED_UBC)) {
+ (void)msleep((caddr_t)&vp->v_lflag, &vp->v_lock,
+ PINOD, "ubc_destroy_named", 0);
+ }
+ vnode_unlock(vp);
}
-
- if (didhold)
- ubc_rele(vp);
-
- return ((kret == KERN_SUCCESS) ? 1 : 0);
+ return (1);
}
+
/*
- * Cause the file data in VM to be pushed out to the storage
- * currently valid pages are NOT invalidated
- * returns 1 on success, 0 on failure
+ * Find out whether a vnode is in use by UBC
+ * Returns 1 if file is in use by UBC, 0 if not
*/
int
-ubc_pushdirty(struct vnode *vp)
+ubc_isinuse(struct vnode *vp, int busycount)
{
- off_t size;
- struct ubc_info *uip;
- void *object;
- kern_return_t kret;
- int didhold;
-
-#if DIAGNOSTIC
- assert(vp);
-#endif
-
- if (UBCINVALID(vp))
- return(0);
-
- if (!UBCINFOEXISTS(vp))
- return(0);
-
- didhold = ubc_hold(vp);
- uip = vp->v_ubcinfo;
- size = uip->ui_size; /* call ubc_getsize() ??? */
-
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
+ if ( !UBCINFOEXISTS(vp))
+ return (0);
+ return(ubc_isinuse_locked(vp, busycount, 0));
+}
- /*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
- vp->v_flag &= ~VHASDIRTY;
- vp->v_clen = 0;
+int
+ubc_isinuse_locked(struct vnode *vp, int busycount, int locked)
+{
+ int retval = 0;
- /* Write the dirty data in the file and discard cached pages */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)0,
- (memory_object_size_t)round_page_64(size),
- MEMORY_OBJECT_RETURN_DIRTY,FALSE,
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
- if (kret != KERN_SUCCESS) {
- printf("ubc_pushdirty: flush failed (error = %d)\n", kret);
- }
+ if (!locked)
+ vnode_lock(vp);
- if (didhold)
- ubc_rele(vp);
+ if ((vp->v_usecount - vp->v_kusecount) > busycount)
+ retval = 1;
- return ((kret == KERN_SUCCESS) ? 1 : 0);
+ if (!locked)
+ vnode_unlock(vp);
+ return (retval);
}
+
/*
- * Make sure the vm object does not vanish
- * returns 1 if the hold count was incremented
- * returns 0 if the hold count was not incremented
- * This return value should be used to balance
- * ubc_hold() and ubc_rele().
+ * MUST only be called by the VM
*/
-int
-ubc_hold(struct vnode *vp)
+__private_extern__ void
+ubc_unmap(struct vnode *vp)
{
+ struct vfs_context context;
struct ubc_info *uip;
- void *object;
+ int need_rele = 0;
- if (UBCINVALID(vp))
- return (0);
+ if (vnode_getwithref(vp))
+ return;
- if (!UBCINFOEXISTS(vp)) {
- /* nothing more to do for a dying vnode */
- if ((vp->v_flag & VXLOCK) || (vp->v_flag & VTERMINATE))
- return (0);
- vp->v_ubcinfo = UBC_INFO_NULL;
- ubc_info_init(vp);
- }
- uip = vp->v_ubcinfo;
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
-
- if (uip->ui_holdcnt++ == 0)
- ubc_getobjref(vp);
- if (uip->ui_holdcnt < 0)
- panic("ubc_hold: ui_holdcnt");
+ if (UBCINFOEXISTS(vp)) {
+ vnode_lock(vp);
- return (1);
+ uip = vp->v_ubcinfo;
+ if (ISSET(uip->ui_flags, UI_ISMAPPED)) {
+ CLR(uip->ui_flags, UI_ISMAPPED);
+ need_rele = 1;
+ }
+ vnode_unlock(vp);
+
+ if (need_rele) {
+ context.vc_proc = current_proc();
+ context.vc_ucred = kauth_cred_get();
+ (void)VNOP_MNOMAP(vp, &context);
+
+ vnode_rele(vp);
+ }
+ }
+ /*
+ * the drop of the vnode ref will cleanup
+ */
+ vnode_put(vp);
}
-/* relese the reference on the vm object */
-void
-ubc_rele(struct vnode *vp)
+kern_return_t
+ubc_page_op(
+ struct vnode *vp,
+ off_t f_offset,
+ int ops,
+ ppnum_t *phys_entryp,
+ int *flagsp)
{
- struct ubc_info *uip;
- void *object;
+ memory_object_control_t control;
- if (UBCINVALID(vp))
- return;
+ control = ubc_getobject(vp, UBC_FLAGS_NONE);
+ if (control == MEMORY_OBJECT_CONTROL_NULL)
+ return KERN_INVALID_ARGUMENT;
- if (!UBCINFOEXISTS(vp)) {
- /* nothing more to do for a dying vnode */
- if ((vp->v_flag & VXLOCK) || (vp->v_flag & VTERMINATE))
- return;
- panic("ubc_rele: can not");
- }
+ return (memory_object_page_op(control,
+ (memory_object_offset_t)f_offset,
+ ops,
+ phys_entryp,
+ flagsp));
+}
+
+__private_extern__ kern_return_t
+ubc_page_op_with_control(
+ memory_object_control_t control,
+ off_t f_offset,
+ int ops,
+ ppnum_t *phys_entryp,
+ int *flagsp)
+{
+ return (memory_object_page_op(control,
+ (memory_object_offset_t)f_offset,
+ ops,
+ phys_entryp,
+ flagsp));
+}
+
+kern_return_t
+ubc_range_op(
+ struct vnode *vp,
+ off_t f_offset_beg,
+ off_t f_offset_end,
+ int ops,
+ int *range)
+{
+ memory_object_control_t control;
- uip = vp->v_ubcinfo;
+ control = ubc_getobject(vp, UBC_FLAGS_NONE);
+ if (control == MEMORY_OBJECT_CONTROL_NULL)
+ return KERN_INVALID_ARGUMENT;
- /* get the object before loosing to hold count */
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
+ return (memory_object_range_op(control,
+ (memory_object_offset_t)f_offset_beg,
+ (memory_object_offset_t)f_offset_end,
+ ops,
+ range));
+}
+
+kern_return_t
+ubc_create_upl(
+ struct vnode *vp,
+ off_t f_offset,
+ long bufsize,
+ upl_t *uplp,
+ upl_page_info_t **plp,
+ int uplflags)
+{
+ memory_object_control_t control;
+ int count;
+ int ubcflags;
+ kern_return_t kr;
+
+ if (bufsize & 0xfff)
+ return KERN_INVALID_ARGUMENT;
- if (uip->ui_holdcnt == 0)
- panic("ubc_rele: ui_holdcnt");
+ if (uplflags & UPL_FOR_PAGEOUT) {
+ uplflags &= ~UPL_FOR_PAGEOUT;
+ ubcflags = UBC_FOR_PAGEOUT;
+ } else
+ ubcflags = UBC_FLAGS_NONE;
- if (--uip->ui_holdcnt == 0) {
- /* If the object is already dead do nothing */
- if (object)
- vm_object_deallocate(object);
-#if DIAGNOSTIC
- else
- printf("ubc_rele: null object for %x", vp);
-#endif /* DIAGNOSTIC */
- }
+ control = ubc_getobject(vp, ubcflags);
+ if (control == MEMORY_OBJECT_CONTROL_NULL)
+ return KERN_INVALID_ARGUMENT;
- return;
+ if (uplflags & UPL_WILL_BE_DUMPED) {
+ uplflags &= ~UPL_WILL_BE_DUMPED;
+ uplflags |= (UPL_NO_SYNC|UPL_SET_INTERNAL);
+ } else
+ uplflags |= (UPL_NO_SYNC|UPL_CLEAN_IN_PLACE|UPL_SET_INTERNAL);
+ count = 0;
+ kr = memory_object_upl_request(control, f_offset, bufsize,
+ uplp, NULL, &count, uplflags);
+ if (plp != NULL)
+ *plp = UPL_GET_INTERNAL_PAGE_LIST(*uplp);
+ return kr;
}
+
-/*
- * The vnode is mapped explicitly
- * Mark it so, and release the vm object reference gained in
- * ubc_info_init()
- */
-void
-ubc_map(struct vnode *vp)
+kern_return_t
+ubc_upl_map(
+ upl_t upl,
+ vm_offset_t *dst_addr)
{
- struct ubc_info *uip;
- void *object;
-
- ubc_lock(vp);
-#if DIAGNOSTIC
- assert(vp);
-#endif
-
- if (UBCINVALID(vp)) {
- ubc_unlock(vp);
- return;
- }
-
- if (!UBCINFOEXISTS(vp))
- panic("ubc_map: can not");
-
- uip = vp->v_ubcinfo;
+ return (vm_upl_map(kernel_map, upl, dst_addr));
+}
- SET(uip->ui_flags, UI_WASMAPPED);
- uip->ui_mapped = 1;
- ubc_unlock(vp);
-#if 1
- /*
- * Do not release the ubc reference on the
- * memory object right away. Let vnreclaim
- * deal with that
- */
-#else
- /*
- * Release the ubc reference. memory object cahe
- * is responsible for caching this object now.
- */
- if (ISSET(uip->ui_flags, UI_HASOBJREF)) {
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
- CLR(uip->ui_flags, UI_HASOBJREF);
- vm_object_deallocate(object);
- }
-#endif
+kern_return_t
+ubc_upl_unmap(
+ upl_t upl)
+{
+ return(vm_upl_unmap(kernel_map, upl));
+}
- return;
+kern_return_t
+ubc_upl_commit(
+ upl_t upl)
+{
+ upl_page_info_t *pl;
+ kern_return_t kr;
+ pl = UPL_GET_INTERNAL_PAGE_LIST(upl);
+ kr = upl_commit(upl, pl, MAX_UPL_TRANSFER);
+ upl_deallocate(upl);
+ return kr;
}
-/*
- * Release the memory object reference on the vnode
- * only if it is not in use
- * Return 1 if the reference was released, 0 otherwise.
- */
-int
-ubc_release(struct vnode *vp)
+
+kern_return_t
+ubc_upl_commit_range(
+ upl_t upl,
+ vm_offset_t offset,
+ vm_size_t size,
+ int flags)
{
- struct ubc_info *uip;
- void *object;
-#if DIAGNOSTIC
- assert(vp);
-#endif
+ upl_page_info_t *pl;
+ boolean_t empty;
+ kern_return_t kr;
- if (UBCINVALID(vp))
- return (0);
+ if (flags & UPL_COMMIT_FREE_ON_EMPTY)
+ flags |= UPL_COMMIT_NOTIFY_EMPTY;
- if (!UBCINFOEXISTS(vp))
- panic("ubc_release: can not");
+ pl = UPL_GET_INTERNAL_PAGE_LIST(upl);
- uip = vp->v_ubcinfo;
+ kr = upl_commit_range(upl, offset, size, flags,
+ pl, MAX_UPL_TRANSFER, &empty);
- /* can not release held vnodes */
- if (uip->ui_holdcnt)
- return (0);
+ if((flags & UPL_COMMIT_FREE_ON_EMPTY) && empty)
+ upl_deallocate(upl);
- if (ISSET(uip->ui_flags, UI_HASOBJREF)) {
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
- CLR(uip->ui_flags, UI_HASOBJREF);
- vm_object_deallocate(object);
- return (1);
- } else
- return (0);
+ return kr;
}
-
-/*
- * Invalidate a range in the memory object that backs this
- * vnode. The offset is truncated to the page boundary and the
- * size is adjusted to include the last page in the range.
- */
-int
-ubc_invalidate(struct vnode *vp, off_t offset, size_t size)
+
+kern_return_t
+ubc_upl_abort_range(
+ upl_t upl,
+ vm_offset_t offset,
+ vm_size_t size,
+ int abort_flags)
{
- struct ubc_info *uip;
- void *object;
- kern_return_t kret;
- off_t toff;
- size_t tsize;
- int didhold;
+ kern_return_t kr;
+ boolean_t empty = FALSE;
-#if DIAGNOSTIC
- assert(vp);
-#endif
+ if (abort_flags & UPL_ABORT_FREE_ON_EMPTY)
+ abort_flags |= UPL_ABORT_NOTIFY_EMPTY;
- if (UBCINVALID(vp))
- return;
+ kr = upl_abort_range(upl, offset, size, abort_flags, &empty);
- if (!UBCINFOEXISTS(vp))
- panic("ubc_invalidate: can not");
-
- didhold = ubc_hold(vp);
- toff = trunc_page_64(offset);
- tsize = (size_t)(round_page_64(offset+size) - toff);
- uip = vp->v_ubcinfo;
- object = _ubc_getobject(vp, UBC_NOREACTIVATE);
- assert(object);
-
- /*
- * memory_object_lock_request() drops an object
- * reference. gain a reference before calling it
- */
- ubc_getobjref(vp);
-
- /* invalidate pages in the range requested */
- kret = memory_object_lock_request(object,
- (vm_object_offset_t)toff,
- (memory_object_size_t)tsize,
- MEMORY_OBJECT_RETURN_NONE,
- (MEMORY_OBJECT_DATA_NO_CHANGE| MEMORY_OBJECT_DATA_FLUSH),
- VM_PROT_NO_CHANGE,MACH_PORT_NULL);
- if (kret != KERN_SUCCESS)
- printf("ubc_invalidate: invalidate failed (error = %d)\n", kret);
-
- if (didhold)
- ubc_rele(vp);
+ if((abort_flags & UPL_ABORT_FREE_ON_EMPTY) && empty)
+ upl_deallocate(upl);
- return ((kret == KERN_SUCCESS) ? 1 : 0);
+ return kr;
}
-/*
- * Find out whether a vnode is in use by UBC
- * Returns 1 if file is in use by UBC, 0 if not
- */
-int
-ubc_isinuse(struct vnode *vp, int tookref)
+kern_return_t
+ubc_upl_abort(
+ upl_t upl,
+ int abort_type)
{
- int busycount = tookref ? 2 : 1;
+ kern_return_t kr;
- if (!UBCINFOEXISTS(vp))
- return(0);
-
- if (vp->v_usecount > busycount)
- return (1);
+ kr = upl_abort(upl, abort_type);
+ upl_deallocate(upl);
+ return kr;
+}
- if ((vp->v_usecount == busycount)
- && (vp->v_ubcinfo->ui_mapped == 1))
- return(1);
- else
- return(0);
+upl_page_info_t *
+ubc_upl_pageinfo(
+ upl_t upl)
+{
+ return (UPL_GET_INTERNAL_PAGE_LIST(upl));
}
+/************* UBC APIS **************/
-/* -- UGLY HACK ALERT -- */
-/*
- * The backdoor routine to clear the UI_WASMAPPED bit.
- * MUST only be called by the VM
- *
- * Note that this routine is not under funnel. There are numerous
- * thing about the calling sequence that make this work on SMP.
- * Any code change in those paths can break this.
- *
- * This will be replaced soon.
- */
-void
-ubc_unmap(struct vnode *vp)
+int
+UBCINFOMISSING(struct vnode * vp)
{
- struct ubc_info *uip;
-
-#if DIAGNOSTIC
- assert(vp);
-#endif
-
- if (UBCINVALID(vp)) {
- return;
- }
-
- if (!UBCINFOEXISTS(vp))
- panic("ubc_unmap: can not");
+ return((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_INFO_NULL));
+}
- ubc_lock(vp);
- uip = vp->v_ubcinfo;
+int
+UBCINFORECLAIMED(struct vnode * vp)
+{
+ return((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo == UBC_INFO_NULL));
+}
- uip->ui_mapped = 0;
- ubc_unlock(vp);
- return;
+int
+UBCINFOEXISTS(struct vnode * vp)
+{
+ return((vp) && ((vp)->v_type == VREG) && ((vp)->v_ubcinfo != UBC_INFO_NULL));
+}
+int
+UBCISVALID(struct vnode * vp)
+{
+ return((vp) && ((vp)->v_type == VREG) && !((vp)->v_flag & VSYSTEM));
+}
+int
+UBCINVALID(struct vnode * vp)
+{
+ return(((vp) == NULL) || ((vp) && ((vp)->v_type != VREG))
+ || ((vp) && ((vp)->v_flag & VSYSTEM)));
+}
+int
+UBCINFOCHECK(const char * fun, struct vnode * vp)
+{
+ if ((vp) && ((vp)->v_type == VREG) &&
+ ((vp)->v_ubcinfo == UBC_INFO_NULL)) {
+ panic("%s: lost ubc_info", (fun));
+ return(1);
+ } else
+ return(0);
}
projects / apple / xnu.git / blobdiff