/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 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
* 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,
* 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 */
#include <sys/param.h>
+#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/mount_internal.h>
+#include <sys/vnode_internal.h>
#include <sys/vnode.h>
#include <sys/ubc.h>
#include <sys/malloc.h>
+#include <sys/fcntl.h>
+#include <sys/time.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsnode.h>
+#include <nfs/nfs_gss.h>
#include <nfs/nfsmount.h>
-LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
-u_long nfsnodehash;
+#define NFSNOHASH(fhsum) \
+ (&nfsnodehashtbl[(fhsum) & nfsnodehash])
+static LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
+static u_long nfsnodehash;
-lck_grp_t * nfs_node_hash_lck_grp;
-lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
-lck_attr_t * nfs_node_hash_lck_attr;
+static lck_grp_t *nfs_node_hash_lck_grp;
+static lck_grp_t *nfs_node_lck_grp;
+static lck_grp_t *nfs_data_lck_grp;
lck_mtx_t *nfs_node_hash_mutex;
+#define NFS_NODE_DBG(...) NFS_DBG(NFS_FAC_NODE, 7, ## __VA_ARGS__)
+
/*
* Initialize hash links for nfsnodes
* and build nfsnode free list.
void
nfs_nhinit(void)
{
- nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
-
- nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
- nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);
-
- nfs_node_hash_lck_attr = lck_attr_alloc_init();
+ nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", LCK_GRP_ATTR_NULL);
+ nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, LCK_ATTR_NULL);
+ nfs_node_lck_grp = lck_grp_alloc_init("nfs_node", LCK_GRP_ATTR_NULL);
+ nfs_data_lck_grp = lck_grp_alloc_init("nfs_data", LCK_GRP_ATTR_NULL);
+}
- nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
+void
+nfs_nhinit_finish(void)
+{
+ lck_mtx_lock(nfs_node_hash_mutex);
+ if (!nfsnodehashtbl)
+ nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
+ lck_mtx_unlock(nfs_node_hash_mutex);
}
/*
return (fhsum);
}
+
+int nfs_case_insensitive(mount_t);
+
+int
+nfs_case_insensitive(mount_t mp)
+{
+ struct nfsmount *nmp = VFSTONFS(mp);
+ int answer = 0;
+ int skip = 0;
+
+ if (nfs_mount_gone(nmp)) {
+ return (0);
+ }
+
+ if (nmp->nm_vers == NFS_VER2) {
+ /* V2 has no way to know */
+ return (0);
+ }
+
+ lck_mtx_lock(&nmp->nm_lock);
+ if (nmp->nm_vers == NFS_VER3) {
+ if (!(nmp->nm_state & NFSSTA_GOTPATHCONF)) {
+ /* We're holding the node lock so we just return
+ * with answer as case sensitive. Is very rare
+ * for file systems not to be homogenous w.r.t. pathconf
+ */
+ skip = 1;
+ }
+ } else if (!(nmp->nm_fsattr.nfsa_flags & NFS_FSFLAG_HOMOGENEOUS)) {
+ /* no pathconf info cached */
+ skip = 1;
+ }
+
+ if (!skip && (nmp->nm_fsattr.nfsa_flags & NFS_FSFLAG_CASE_INSENSITIVE))
+ answer = 1;
+
+ lck_mtx_unlock(&nmp->nm_lock);
+
+ return (answer);
+}
+
+
/*
* Look up a vnode/nfsnode by file handle.
* Callers must check for mount points!!
*/
int
nfs_nget(
- mount_t mntp,
- vnode_t dvp,
+ mount_t mp,
+ nfsnode_t dnp,
struct componentname *cnp,
u_char *fhp,
int fhsize,
struct nfs_vattr *nvap,
u_int64_t *xidp,
+ uint32_t auth,
int flags,
- struct nfsnode **npp)
+ nfsnode_t *npp)
{
- struct nfsnode *np;
+ nfsnode_t np;
struct nfsnodehashhead *nhpp;
- vnode_t vp, nvp;
- int error;
- mount_t mp;
+ vnode_t vp;
+ int error, nfsvers;
+ mount_t mp2;
struct vnode_fsparam vfsp;
uint32_t vid;
+ FSDBG_TOP(263, mp, dnp, flags, npp);
+
/* Check for unmount in progress */
- if (!mntp || (mntp->mnt_kern_flag & MNTK_UNMOUNT)) {
- *npp = 0;
- return (!mntp ? ENXIO : EPERM);
+ if (!mp || vfs_isforce(mp)) {
+ *npp = NULL;
+ error = ENXIO;
+ FSDBG_BOT(263, mp, dnp, 0xd1e, error);
+ return (error);
}
+ nfsvers = VFSTONFS(mp)->nm_vers;
nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
loop:
lck_mtx_lock(nfs_node_hash_mutex);
for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
- mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
- if (mntp != mp || np->n_fhsize != fhsize ||
+ mp2 = (np->n_hflag & NHINIT) ? np->n_mount : NFSTOMP(np);
+ if (mp != mp2 || np->n_fhsize != fhsize ||
bcmp(fhp, np->n_fhp, fhsize))
continue;
- /* if the node is still being initialized, sleep on it */
- if (np->n_flag & NINIT) {
- np->n_flag |= NWINIT;
- msleep(np, nfs_node_hash_mutex, PDROP | PINOD, "nfs_nget", 0);
+ if (nvap && (nvap->nva_flags & NFS_FFLAG_TRIGGER_REFERRAL) &&
+ cnp && (cnp->cn_namelen > (fhsize - (int)sizeof(dnp)))) {
+ /* The name was too long to fit in the file handle. Check it against the node's name. */
+ int namecmp = 0;
+ const char *vname = vnode_getname(NFSTOV(np));
+ if (vname) {
+ if (cnp->cn_namelen != (int)strlen(vname))
+ namecmp = 1;
+ else
+ namecmp = strncmp(vname, cnp->cn_nameptr, cnp->cn_namelen);
+ vnode_putname(vname);
+ }
+ if (namecmp) /* full name didn't match */
+ continue;
+ }
+ FSDBG(263, dnp, np, np->n_flag, 0xcace0000);
+ /* if the node is locked, sleep on it */
+ if ((np->n_hflag & NHLOCKED) && !(flags & NG_NOCREATE)) {
+ np->n_hflag |= NHLOCKWANT;
+ FSDBG(263, dnp, np, np->n_flag, 0xcace2222);
+ msleep(np, nfs_node_hash_mutex, PDROP | PINOD, "nfs_nget", NULL);
+ FSDBG(263, dnp, np, np->n_flag, 0xcace3333);
goto loop;
}
vp = NFSTOV(np);
* If vnode is being reclaimed or has already
* changed identity, no need to wait.
*/
+ FSDBG_BOT(263, dnp, *npp, 0xcace0d1e, error);
return (error);
- }
+ }
+ if ((error = nfs_node_lock(np))) {
+ /* this only fails if the node is now unhashed */
+ /* so let's see if we can find/create it again */
+ FSDBG(263, dnp, *npp, 0xcaced1e2, error);
+ vnode_put(vp);
+ if (flags & NG_NOCREATE) {
+ *npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0xcaced1e0, ENOENT);
+ return (ENOENT);
+ }
+ goto loop;
+ }
/* update attributes */
- error = nfs_loadattrcache(np, nvap, xidp, 0);
+ if (nvap)
+ error = nfs_loadattrcache(np, nvap, xidp, 0);
if (error) {
+ nfs_node_unlock(np);
vnode_put(vp);
} else {
- if (dvp && cnp && (flags & NG_MAKEENTRY))
- cache_enter(dvp, vp, cnp);
+ if (dnp && cnp && (flags & NG_MAKEENTRY))
+ cache_enter(NFSTOV(dnp), vp, cnp);
+ /*
+ * Update the vnode if the name/and or the parent has
+ * changed. We need to do this so that if getattrlist is
+ * called asking for ATTR_CMN_NAME, that the "most"
+ * correct name is being returned. In addition for
+ * monitored vnodes we need to kick the vnode out of the
+ * name cache. We do this so that if there are hard
+ * links in the same directory the link will not be
+ * found and a lookup will get us here to return the
+ * name of the current link. In addition by removing the
+ * name from the name cache the old name will not be
+ * found after a rename done on another client or the
+ * server. The principle reason to do this is because
+ * Finder is asking for notifications on a directory.
+ * The directory changes, Finder gets notified, reads
+ * the directory (which we have purged) and for each
+ * entry returned calls getattrlist with the name
+ * returned from readdir. gettattrlist has to call
+ * namei/lookup to resolve the name, because its not in
+ * the cache we end up here. We need to update the name
+ * so Finder will get the name it called us with.
+ *
+ * We had an imperfect solution with respect to case
+ * sensitivity. There is a test that is run in
+ * FileBuster that does renames from some name to
+ * another name differing only in case. It then reads
+ * the directory looking for the new name, after it
+ * finds that new name, it ask gettattrlist to verify
+ * that the name is the new name. Usually that works,
+ * but renames generate fsevents and fseventsd will do a
+ * lookup on the name via lstat. Since that test renames
+ * old name to new name back and forth there is a race
+ * that an fsevent will be behind and will access the
+ * file by the old name, on a case insensitive file
+ * system that will work. Problem is if we do a case
+ * sensitive compare, we're going to change the name,
+ * which the test's getattrlist verification step is
+ * going to fail. So we will check the case sensitivity
+ * of the file system and do the appropriate compare. In
+ * a rare instance for non homogeneous file systems
+ * w.r.t. pathconf we will use case sensitive compares.
+ * That could break if the file system is actually case
+ * insensitive.
+ *
+ * Note that V2 does not know the case, so we just
+ * assume case sensitivity.
+ *
+ * This is clearly not perfect due to races, but this is
+ * as good as its going to get. You can defeat the
+ * handling of hard links simply by doing:
+ *
+ * while :; do ls -l > /dev/null; done
+ *
+ * in a terminal window. Even a single ls -l can cause a
+ * race.
+ *
+ * <rant>What we really need is for the caller, that
+ * knows the name being used is valid since it got it
+ * from a readdir to use that name and not ask for the
+ * ATTR_CMN_NAME</rant>
+ */
+ if (dnp && cnp && (vp != NFSTOV(dnp))) {
+ int update_flags = (vnode_ismonitored((NFSTOV(dnp)))) ? VNODE_UPDATE_CACHE : 0;
+ int (*cmp)(const char *s1, const char *s2, size_t n);
+
+ cmp = nfs_case_insensitive(mp) ? strncasecmp : strncmp;
+
+ if (vp->v_name && cnp->cn_namelen && (*cmp)(cnp->cn_nameptr, vp->v_name, cnp->cn_namelen))
+ update_flags |= VNODE_UPDATE_NAME;
+ if ((vp->v_name == NULL && cnp->cn_namelen != 0) || (vp->v_name != NULL && cnp->cn_namelen == 0))
+ update_flags |= VNODE_UPDATE_NAME;
+ if (vnode_parent(vp) != NFSTOV(dnp))
+ update_flags |= VNODE_UPDATE_PARENT;
+ if (update_flags) {
+ NFS_NODE_DBG("vnode_update_identity old name %s new name %.*s update flags = %x\n",
+ vp->v_name, cnp->cn_namelen, cnp->cn_nameptr ? cnp->cn_nameptr : "", update_flags);
+ vnode_update_identity(vp, NFSTOV(dnp), cnp->cn_nameptr, cnp->cn_namelen, 0, update_flags);
+ }
+ }
+
*npp = np;
}
+ FSDBG_BOT(263, dnp, *npp, 0xcace0000, error);
return(error);
}
+ FSDBG(263, mp, dnp, npp, 0xaaaaaaaa);
+
+ if (flags & NG_NOCREATE) {
+ lck_mtx_unlock(nfs_node_hash_mutex);
+ *npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0x80000001, ENOENT);
+ return (ENOENT);
+ }
+
/*
* allocate and initialize nfsnode and stick it in the hash
* before calling getnewvnode(). Anyone finding it in the
* hash before initialization is complete will wait for it.
*/
- MALLOC_ZONE(np, struct nfsnode *, sizeof *np, M_NFSNODE, M_WAITOK);
+ MALLOC_ZONE(np, nfsnode_t, sizeof *np, M_NFSNODE, M_WAITOK);
if (!np) {
lck_mtx_unlock(nfs_node_hash_mutex);
*npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0x80000001, ENOMEM);
return (ENOMEM);
}
- bzero((caddr_t)np, sizeof *np);
- np->n_flag |= NINIT;
- np->n_mount = mntp;
+ bzero(np, sizeof *np);
+ np->n_hflag |= (NHINIT | NHLOCKED);
+ np->n_mount = mp;
+ np->n_auth = auth;
+ TAILQ_INIT(&np->n_opens);
+ TAILQ_INIT(&np->n_lock_owners);
+ TAILQ_INIT(&np->n_locks);
+ np->n_dlink.tqe_next = NFSNOLIST;
+ np->n_dreturn.tqe_next = NFSNOLIST;
+ np->n_monlink.le_next = NFSNOLIST;
+
+ /* ugh... need to keep track of ".zfs" directories to workaround server bugs */
+ if ((nvap->nva_type == VDIR) && cnp && (cnp->cn_namelen == 4) &&
+ (cnp->cn_nameptr[0] == '.') && (cnp->cn_nameptr[1] == 'z') &&
+ (cnp->cn_nameptr[2] == 'f') && (cnp->cn_nameptr[3] == 's'))
+ np->n_flag |= NISDOTZFS;
+ if (dnp && (dnp->n_flag & NISDOTZFS))
+ np->n_flag |= NISDOTZFSCHILD;
+
+ if (dnp && cnp && ((cnp->cn_namelen != 2) ||
+ (cnp->cn_nameptr[0] != '.') || (cnp->cn_nameptr[1] != '.'))) {
+ vnode_t dvp = NFSTOV(dnp);
+ if (!vnode_get(dvp)) {
+ if (!vnode_ref(dvp))
+ np->n_parent = dvp;
+ vnode_put(dvp);
+ }
+ }
/* setup node's file handle */
if (fhsize > NFS_SMALLFH) {
lck_mtx_unlock(nfs_node_hash_mutex);
FREE_ZONE(np, sizeof *np, M_NFSNODE);
*npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0x80000002, ENOMEM);
return (ENOMEM);
}
} else {
np->n_fhsize = fhsize;
/* Insert the nfsnode in the hash queue for its new file handle */
- np->n_flag |= NHASHED;
LIST_INSERT_HEAD(nhpp, np, n_hash);
+ np->n_hflag |= NHHASHED;
+ FSDBG(266, 0, np, np->n_flag, np->n_hflag);
+
+ /* lock the new nfsnode */
+ lck_mtx_init(&np->n_lock, nfs_node_lck_grp, LCK_ATTR_NULL);
+ lck_rw_init(&np->n_datalock, nfs_data_lck_grp, LCK_ATTR_NULL);
+ lck_mtx_init(&np->n_openlock, nfs_open_grp, LCK_ATTR_NULL);
+ lck_mtx_lock(&np->n_lock);
/* release lock on hash table */
lck_mtx_unlock(nfs_node_hash_mutex);
/* do initial loading of attributes */
+ NACLINVALIDATE(np);
+ NACCESSINVALIDATE(np);
error = nfs_loadattrcache(np, nvap, xidp, 1);
if (error) {
+ FSDBG(266, 0, np, np->n_flag, 0xb1eb1e);
+ nfs_node_unlock(np);
lck_mtx_lock(nfs_node_hash_mutex);
LIST_REMOVE(np, n_hash);
- np->n_flag &= ~(NHASHED|NINIT);
- if (np->n_flag & NWINIT) {
- np->n_flag &= ~NWINIT;
- wakeup((caddr_t)np);
+ np->n_hflag &= ~(NHHASHED|NHINIT|NHLOCKED);
+ if (np->n_hflag & NHLOCKWANT) {
+ np->n_hflag &= ~NHLOCKWANT;
+ wakeup(np);
}
lck_mtx_unlock(nfs_node_hash_mutex);
+ if (np->n_parent) {
+ if (!vnode_get(np->n_parent)) {
+ vnode_rele(np->n_parent);
+ vnode_put(np->n_parent);
+ }
+ np->n_parent = NULL;
+ }
+ lck_mtx_destroy(&np->n_lock, nfs_node_lck_grp);
+ lck_rw_destroy(&np->n_datalock, nfs_data_lck_grp);
+ lck_mtx_destroy(&np->n_openlock, nfs_open_grp);
if (np->n_fhsize > NFS_SMALLFH)
FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
FREE_ZONE(np, sizeof *np, M_NFSNODE);
*npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0x80000003, error);
return (error);
}
- np->n_mtime = nvap->nva_mtime;
+ NFS_CHANGED_UPDATE(nfsvers, np, nvap);
if (nvap->nva_type == VDIR)
- np->n_ncmtime = nvap->nva_mtime;
- NMODEINVALIDATE(np);
+ NFS_CHANGED_UPDATE_NC(nfsvers, np, nvap);
/* now, attempt to get a new vnode */
- vfsp.vnfs_mp = mntp;
+ vfsp.vnfs_mp = mp;
vfsp.vnfs_vtype = nvap->nva_type;
vfsp.vnfs_str = "nfs";
- vfsp.vnfs_dvp = dvp;
+ vfsp.vnfs_dvp = dnp ? NFSTOV(dnp) : NULL;
vfsp.vnfs_fsnode = np;
- if (nvap->nva_type == VFIFO)
- vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
- else if (nvap->nva_type == VBLK || nvap->nva_type == VCHR)
- vfsp.vnfs_vops = spec_nfsv2nodeop_p;
- else
- vfsp.vnfs_vops = nfsv2_vnodeop_p;
+ if (nfsvers == NFS_VER4) {
+#if FIFO
+ if (nvap->nva_type == VFIFO)
+ vfsp.vnfs_vops = fifo_nfsv4nodeop_p;
+ else
+#endif /* FIFO */
+ if (nvap->nva_type == VBLK || nvap->nva_type == VCHR)
+ vfsp.vnfs_vops = spec_nfsv4nodeop_p;
+ else
+ vfsp.vnfs_vops = nfsv4_vnodeop_p;
+ } else {
+#if FIFO
+ if (nvap->nva_type == VFIFO)
+ vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
+ else
+#endif /* FIFO */
+ if (nvap->nva_type == VBLK || nvap->nva_type == VCHR)
+ vfsp.vnfs_vops = spec_nfsv2nodeop_p;
+ else
+ vfsp.vnfs_vops = nfsv2_vnodeop_p;
+ }
vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
vfsp.vnfs_marksystem = 0;
vfsp.vnfs_rdev = 0;
vfsp.vnfs_filesize = nvap->nva_size;
vfsp.vnfs_cnp = cnp;
- if (dvp && cnp && (flags & NG_MAKEENTRY))
- vfsp.vnfs_flags = 0;
- else
- vfsp.vnfs_flags = VNFS_NOCACHE;
- error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
+ vfsp.vnfs_flags = VNFS_ADDFSREF;
+ if (!dnp || !cnp || !(flags & NG_MAKEENTRY))
+ vfsp.vnfs_flags |= VNFS_NOCACHE;
+
+#if CONFIG_TRIGGERS
+ if ((nfsvers >= NFS_VER4) && (nvap->nva_type == VDIR) && (np->n_vattr.nva_flags & NFS_FFLAG_TRIGGER)) {
+ struct vnode_trigger_param vtp;
+ bzero(&vtp, sizeof(vtp));
+ bcopy(&vfsp, &vtp.vnt_params, sizeof(vfsp));
+ vtp.vnt_resolve_func = nfs_mirror_mount_trigger_resolve;
+ vtp.vnt_unresolve_func = nfs_mirror_mount_trigger_unresolve;
+ vtp.vnt_rearm_func = nfs_mirror_mount_trigger_rearm;
+ vtp.vnt_flags = VNT_AUTO_REARM;
+ error = vnode_create(VNCREATE_TRIGGER, VNCREATE_TRIGGER_SIZE, &vtp, &np->n_vnode);
+ } else
+#endif
+ {
+ error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &np->n_vnode);
+ }
if (error) {
+ FSDBG(266, 0, np, np->n_flag, 0xb1eb1e);
+ nfs_node_unlock(np);
lck_mtx_lock(nfs_node_hash_mutex);
LIST_REMOVE(np, n_hash);
- np->n_flag &= ~(NHASHED|NINIT);
- if (np->n_flag & NWINIT) {
- np->n_flag &= ~NWINIT;
- wakeup((caddr_t)np);
+ np->n_hflag &= ~(NHHASHED|NHINIT|NHLOCKED);
+ if (np->n_hflag & NHLOCKWANT) {
+ np->n_hflag &= ~NHLOCKWANT;
+ wakeup(np);
}
lck_mtx_unlock(nfs_node_hash_mutex);
+ if (np->n_parent) {
+ if (!vnode_get(np->n_parent)) {
+ vnode_rele(np->n_parent);
+ vnode_put(np->n_parent);
+ }
+ np->n_parent = NULL;
+ }
+ lck_mtx_destroy(&np->n_lock, nfs_node_lck_grp);
+ lck_rw_destroy(&np->n_datalock, nfs_data_lck_grp);
+ lck_mtx_destroy(&np->n_openlock, nfs_open_grp);
if (np->n_fhsize > NFS_SMALLFH)
FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
FREE_ZONE(np, sizeof *np, M_NFSNODE);
*npp = 0;
+ FSDBG_BOT(263, dnp, *npp, 0x80000004, error);
return (error);
}
- vp = nvp;
- np->n_vnode = vp;
- vnode_addfsref(vp);
- vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
- *npp = np;
+ vp = np->n_vnode;
+ vnode_settag(vp, VT_NFS);
/* node is now initialized */
/* check if anyone's waiting on this node */
lck_mtx_lock(nfs_node_hash_mutex);
- np->n_flag &= ~NINIT;
- if (np->n_flag & NWINIT) {
- np->n_flag &= ~NWINIT;
- wakeup((caddr_t)np);
+ np->n_hflag &= ~(NHINIT|NHLOCKED);
+ if (np->n_hflag & NHLOCKWANT) {
+ np->n_hflag &= ~NHLOCKWANT;
+ wakeup(np);
}
lck_mtx_unlock(nfs_node_hash_mutex);
+ *npp = np;
+
+ FSDBG_BOT(263, dnp, vp, *npp, error);
return (error);
}
int
-nfs_inactive(ap)
+nfs_vnop_inactive(
struct vnop_inactive_args /* {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vfs_context_t a_context;
- } */ *ap;
+ } */ *ap)
{
- register struct nfsnode *np;
- register struct sillyrename *sp;
+ vnode_t vp = ap->a_vp;
+ vfs_context_t ctx = ap->a_context;
+ nfsnode_t np;
+ struct nfs_sillyrename *nsp;
+ struct nfs_vattr nvattr;
+ int unhash, attrerr, busyerror, error, inuse, busied, force;
+ struct nfs_open_file *nofp;
+ struct componentname cn;
+ struct nfsmount *nmp;
+ mount_t mp;
- np = VTONFS(ap->a_vp);
- if (vnode_vtype(ap->a_vp) != VDIR) {
- sp = np->n_sillyrename;
- np->n_sillyrename = (struct sillyrename *)0;
- } else
- sp = (struct sillyrename *)0;
+ if (vp == NULL)
+ panic("nfs_vnop_inactive: vp == NULL");
+ np = VTONFS(vp);
+ if (np == NULL)
+ panic("nfs_vnop_inactive: np == NULL");
+
+ nmp = NFSTONMP(np);
+ mp = vnode_mount(vp);
- if (sp) {
+restart:
+ force = (!mp || vfs_isforce(mp));
+ error = 0;
+ inuse = (nfs_mount_state_in_use_start(nmp, NULL) == 0);
+
+ /* There shouldn't be any open or lock state at this point */
+ lck_mtx_lock(&np->n_openlock);
+ if (np->n_openrefcnt && !force) {
/*
- * Remove the silly file that was rename'd earlier
+ * vnode_rele and vnode_put drop the vnode lock before
+ * calling VNOP_INACTIVE, so there is a race were the
+ * vnode could become active again. Perhaps there are
+ * other places where this can happen, so if we've got
+ * here we need to get out.
*/
-#if DIAGNOSTIC
- kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n",
- &sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap,
- (unsigned)np, (unsigned)sp);
-#endif
- nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
- np->n_size = 0;
- ubc_setsize(ap->a_vp, (off_t)0);
- nfs_removeit(sp);
+#ifdef NFS_NODE_DEBUG
+ NP(np, "nfs_vnop_inactive: still open: %d", np->n_openrefcnt);
+#endif
+ lck_mtx_unlock(&np->n_openlock);
+ return 0;
+ }
+
+ TAILQ_FOREACH(nofp, &np->n_opens, nof_link) {
+ lck_mtx_lock(&nofp->nof_lock);
+ if (nofp->nof_flags & NFS_OPEN_FILE_BUSY) {
+ if (!force)
+ NP(np, "nfs_vnop_inactive: open file busy");
+ busied = 0;
+ } else {
+ nofp->nof_flags |= NFS_OPEN_FILE_BUSY;
+ busied = 1;
+ }
+ lck_mtx_unlock(&nofp->nof_lock);
+ if ((np->n_flag & NREVOKE) || (nofp->nof_flags & NFS_OPEN_FILE_LOST)) {
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ continue;
+ }
+ /*
+ * If we just created the file, we already had it open in
+ * anticipation of getting a subsequent open call. If the
+ * node has gone inactive without being open, we need to
+ * clean up (close) the open done in the create.
+ */
+ if ((nofp->nof_flags & NFS_OPEN_FILE_CREATE) && nofp->nof_creator && !force) {
+ if (nofp->nof_flags & NFS_OPEN_FILE_REOPEN) {
+ lck_mtx_unlock(&np->n_openlock);
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ if (inuse)
+ nfs_mount_state_in_use_end(nmp, 0);
+ if (!nfs4_reopen(nofp, NULL))
+ goto restart;
+ }
+ nofp->nof_flags &= ~NFS_OPEN_FILE_CREATE;
+ lck_mtx_unlock(&np->n_openlock);
+ error = nfs_close(np, nofp, NFS_OPEN_SHARE_ACCESS_BOTH, NFS_OPEN_SHARE_DENY_NONE, ctx);
+ if (error) {
+ NP(np, "nfs_vnop_inactive: create close error: %d", error);
+ nofp->nof_flags |= NFS_OPEN_FILE_CREATE;
+ }
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ if (inuse)
+ nfs_mount_state_in_use_end(nmp, error);
+ goto restart;
+ }
+ if (nofp->nof_flags & NFS_OPEN_FILE_NEEDCLOSE) {
+ /*
+ * If the file is marked as needing reopen, but this was the only
+ * open on the file, just drop the open.
+ */
+ nofp->nof_flags &= ~NFS_OPEN_FILE_NEEDCLOSE;
+ if ((nofp->nof_flags & NFS_OPEN_FILE_REOPEN) && (nofp->nof_opencnt == 1)) {
+ nofp->nof_flags &= ~NFS_OPEN_FILE_REOPEN;
+ nofp->nof_r--;
+ nofp->nof_opencnt--;
+ nofp->nof_access = 0;
+ } else if (!force) {
+ lck_mtx_unlock(&np->n_openlock);
+ if (nofp->nof_flags & NFS_OPEN_FILE_REOPEN) {
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ if (inuse)
+ nfs_mount_state_in_use_end(nmp, 0);
+ if (!nfs4_reopen(nofp, NULL))
+ goto restart;
+ }
+ error = nfs_close(np, nofp, NFS_OPEN_SHARE_ACCESS_READ, NFS_OPEN_SHARE_DENY_NONE, ctx);
+ if (error) {
+ NP(np, "nfs_vnop_inactive: need close error: %d", error);
+ nofp->nof_flags |= NFS_OPEN_FILE_NEEDCLOSE;
+ }
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ if (inuse)
+ nfs_mount_state_in_use_end(nmp, error);
+ goto restart;
+ }
+ }
+ if (nofp->nof_opencnt && !force)
+ NP(np, "nfs_vnop_inactive: file still open: %d", nofp->nof_opencnt);
+ if (!force && (nofp->nof_access || nofp->nof_deny ||
+ nofp->nof_mmap_access || nofp->nof_mmap_deny ||
+ nofp->nof_r || nofp->nof_w || nofp->nof_rw ||
+ nofp->nof_r_dw || nofp->nof_w_dw || nofp->nof_rw_dw ||
+ nofp->nof_r_drw || nofp->nof_w_drw || nofp->nof_rw_drw ||
+ nofp->nof_d_r || nofp->nof_d_w || nofp->nof_d_rw ||
+ nofp->nof_d_r_dw || nofp->nof_d_w_dw || nofp->nof_d_rw_dw ||
+ nofp->nof_d_r_drw || nofp->nof_d_w_drw || nofp->nof_d_rw_drw)) {
+ NP(np, "nfs_vnop_inactive: non-zero access: %d %d %d %d # %u.%u %u.%u %u.%u dw %u.%u %u.%u %u.%u drw %u.%u %u.%u %u.%u",
+ nofp->nof_access, nofp->nof_deny,
+ nofp->nof_mmap_access, nofp->nof_mmap_deny,
+ nofp->nof_r, nofp->nof_d_r,
+ nofp->nof_w, nofp->nof_d_w,
+ nofp->nof_rw, nofp->nof_d_rw,
+ nofp->nof_r_dw, nofp->nof_d_r_dw,
+ nofp->nof_w_dw, nofp->nof_d_w_dw,
+ nofp->nof_rw_dw, nofp->nof_d_rw_dw,
+ nofp->nof_r_drw, nofp->nof_d_r_drw,
+ nofp->nof_w_drw, nofp->nof_d_w_drw,
+ nofp->nof_rw_drw, nofp->nof_d_rw_drw);
+ }
+ if (busied)
+ nfs_open_file_clear_busy(nofp);
+ }
+ lck_mtx_unlock(&np->n_openlock);
+
+ if (inuse && nfs_mount_state_in_use_end(nmp, error))
+ goto restart;
+
+ nfs_node_lock_force(np);
+
+ if (vnode_vtype(vp) != VDIR) {
+ nsp = np->n_sillyrename;
+ np->n_sillyrename = NULL;
+ } else {
+ nsp = NULL;
+ }
+
+ FSDBG_TOP(264, vp, np, np->n_flag, nsp);
+
+ if (!nsp) {
+ /* no silly file to clean up... */
+ /* clear all flags other than these */
+ np->n_flag &= (NMODIFIED);
+ nfs_node_unlock(np);
+ FSDBG_BOT(264, vp, np, np->n_flag, 0);
+ return (0);
+ }
+ nfs_node_unlock(np);
+
+ /* Remove the silly file that was rename'd earlier */
+
+ /* flush all the buffers */
+ nfs_vinvalbuf2(vp, V_SAVE, vfs_context_thread(ctx), nsp->nsr_cred, 1);
+
+ /* try to get the latest attributes */
+ attrerr = nfs_getattr(np, &nvattr, ctx, NGA_UNCACHED);
+
+ /* Check if we should remove it from the node hash. */
+ /* Leave it if inuse or it has multiple hard links. */
+ if (vnode_isinuse(vp, 0) || (!attrerr && (nvattr.nva_nlink > 1))) {
+ unhash = 0;
+ } else {
+ unhash = 1;
+ ubc_setsize(vp, 0);
+ }
+
+ /* mark this node and the directory busy while we do the remove */
+ busyerror = nfs_node_set_busy2(nsp->nsr_dnp, np, vfs_context_thread(ctx));
+
+ /* lock the node while we remove the silly file */
+ lck_mtx_lock(nfs_node_hash_mutex);
+ while (np->n_hflag & NHLOCKED) {
+ np->n_hflag |= NHLOCKWANT;
+ msleep(np, nfs_node_hash_mutex, PINOD, "nfs_inactive", NULL);
+ }
+ np->n_hflag |= NHLOCKED;
+ lck_mtx_unlock(nfs_node_hash_mutex);
+
+ /* purge the name cache to deter others from finding it */
+ bzero(&cn, sizeof(cn));
+ cn.cn_nameptr = nsp->nsr_name;
+ cn.cn_namelen = nsp->nsr_namlen;
+ nfs_name_cache_purge(nsp->nsr_dnp, np, &cn, ctx);
+
+ FSDBG(264, np, np->n_size, np->n_vattr.nva_size, 0xf00d00f1);
+
+ /* now remove the silly file */
+ nfs_removeit(nsp);
+
+ /* clear all flags other than these */
+ nfs_node_lock_force(np);
+ np->n_flag &= (NMODIFIED);
+ nfs_node_unlock(np);
+
+ if (!busyerror)
+ nfs_node_clear_busy2(nsp->nsr_dnp, np);
+
+ if (unhash && vnode_isinuse(vp, 0)) {
+ /* vnode now inuse after silly remove? */
+ unhash = 0;
+ ubc_setsize(vp, np->n_size);
+ }
+
+ lck_mtx_lock(nfs_node_hash_mutex);
+ if (unhash) {
/*
* remove nfsnode from hash now so we can't accidentally find it
* again if another object gets created with the same filehandle
* before this vnode gets reclaimed
*/
- lck_mtx_lock(nfs_node_hash_mutex);
- LIST_REMOVE(np, n_hash);
- np->n_flag &= ~NHASHED;
- lck_mtx_unlock(nfs_node_hash_mutex);
- if (IS_VALID_CRED(sp->s_cred)) {
- kauth_cred_unref(&sp->s_cred);
+ if (np->n_hflag & NHHASHED) {
+ LIST_REMOVE(np, n_hash);
+ np->n_hflag &= ~NHHASHED;
+ FSDBG(266, 0, np, np->n_flag, 0xb1eb1e);
}
- vnode_rele(sp->s_dvp);
- FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
- vnode_recycle(ap->a_vp);
+ vnode_recycle(vp);
}
- /* clear all flags other than these */
- np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NHASHED);
+ /* unlock the node */
+ np->n_hflag &= ~NHLOCKED;
+ if (np->n_hflag & NHLOCKWANT) {
+ np->n_hflag &= ~NHLOCKWANT;
+ wakeup(np);
+ }
+ lck_mtx_unlock(nfs_node_hash_mutex);
+
+ /* cleanup sillyrename info */
+ if (nsp->nsr_cred != NOCRED)
+ kauth_cred_unref(&nsp->nsr_cred);
+ vnode_rele(NFSTOV(nsp->nsr_dnp));
+ FREE_ZONE(nsp, sizeof(*nsp), M_NFSREQ);
+
+ FSDBG_BOT(264, vp, np, np->n_flag, 0);
return (0);
}
* Reclaim an nfsnode so that it can be used for other purposes.
*/
int
-nfs_reclaim(ap)
+nfs_vnop_reclaim(
struct vnop_reclaim_args /* {
struct vnodeop_desc *a_desc;
vnode_t a_vp;
vfs_context_t a_context;
- } */ *ap;
+ } */ *ap)
{
vnode_t vp = ap->a_vp;
- struct nfsnode *np = VTONFS(vp);
- struct nfsdmap *dp, *dp2;
+ nfsnode_t np = VTONFS(vp);
+ vfs_context_t ctx = ap->a_context;
+ struct nfs_open_file *nofp, *nextnofp;
+ struct nfs_file_lock *nflp, *nextnflp;
+ struct nfs_lock_owner *nlop, *nextnlop;
+ struct nfsmount *nmp = np->n_mount ? VFSTONFS(np->n_mount) : NFSTONMP(np);
+ mount_t mp = vnode_mount(vp);
+ int force;
+
+ FSDBG_TOP(265, vp, np, np->n_flag, 0);
+ force = (!mp || vfs_isforce(mp) || nfs_mount_gone(nmp));
+
+ /* There shouldn't be any open or lock state at this point */
+ lck_mtx_lock(&np->n_openlock);
+
+ if (nmp && (nmp->nm_vers >= NFS_VER4)) {
+ /* need to drop a delegation */
+ if (np->n_dreturn.tqe_next != NFSNOLIST) {
+ /* remove this node from the delegation return list */
+ lck_mtx_lock(&nmp->nm_lock);
+ if (np->n_dreturn.tqe_next != NFSNOLIST) {
+ TAILQ_REMOVE(&nmp->nm_dreturnq, np, n_dreturn);
+ np->n_dreturn.tqe_next = NFSNOLIST;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ if (np->n_dlink.tqe_next != NFSNOLIST) {
+ /* remove this node from the delegation list */
+ lck_mtx_lock(&nmp->nm_lock);
+ if (np->n_dlink.tqe_next != NFSNOLIST) {
+ TAILQ_REMOVE(&nmp->nm_delegations, np, n_dlink);
+ np->n_dlink.tqe_next = NFSNOLIST;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+ if ((np->n_openflags & N_DELEG_MASK) && !force) {
+ /* try to return the delegation */
+ np->n_openflags &= ~N_DELEG_MASK;
+ nfs4_delegreturn_rpc(nmp, np->n_fhp, np->n_fhsize, &np->n_dstateid,
+ R_RECOVER, vfs_context_thread(ctx), vfs_context_ucred(ctx));
+ }
+ if (np->n_attrdirfh) {
+ FREE(np->n_attrdirfh, M_TEMP);
+ np->n_attrdirfh = NULL;
+ }
+ }
+
+ /* clean up file locks */
+ TAILQ_FOREACH_SAFE(nflp, &np->n_locks, nfl_link, nextnflp) {
+ if (!(nflp->nfl_flags & NFS_FILE_LOCK_DEAD) && !force) {
+ NP(np, "nfs_vnop_reclaim: lock 0x%llx 0x%llx 0x%x (bc %d)",
+ nflp->nfl_start, nflp->nfl_end, nflp->nfl_flags, nflp->nfl_blockcnt);
+ }
+ if (!(nflp->nfl_flags & (NFS_FILE_LOCK_BLOCKED|NFS_FILE_LOCK_DEAD))) {
+ /* try sending an unlock RPC if it wasn't delegated */
+ if (!(nflp->nfl_flags & NFS_FILE_LOCK_DELEGATED) && !force)
+ nmp->nm_funcs->nf_unlock_rpc(np, nflp->nfl_owner, F_WRLCK, nflp->nfl_start, nflp->nfl_end, R_RECOVER,
+ NULL, nflp->nfl_owner->nlo_open_owner->noo_cred);
+ lck_mtx_lock(&nflp->nfl_owner->nlo_lock);
+ TAILQ_REMOVE(&nflp->nfl_owner->nlo_locks, nflp, nfl_lolink);
+ lck_mtx_unlock(&nflp->nfl_owner->nlo_lock);
+ }
+ TAILQ_REMOVE(&np->n_locks, nflp, nfl_link);
+ nfs_file_lock_destroy(nflp);
+ }
+ /* clean up lock owners */
+ TAILQ_FOREACH_SAFE(nlop, &np->n_lock_owners, nlo_link, nextnlop) {
+ if (!TAILQ_EMPTY(&nlop->nlo_locks) && !force)
+ NP(np, "nfs_vnop_reclaim: lock owner with locks");
+ TAILQ_REMOVE(&np->n_lock_owners, nlop, nlo_link);
+ nfs_lock_owner_destroy(nlop);
+ }
+ /* clean up open state */
+ if (np->n_openrefcnt && !force)
+ NP(np, "nfs_vnop_reclaim: still open: %d", np->n_openrefcnt);
+ TAILQ_FOREACH_SAFE(nofp, &np->n_opens, nof_link, nextnofp) {
+ if (nofp->nof_flags & NFS_OPEN_FILE_BUSY)
+ NP(np, "nfs_vnop_reclaim: open file busy");
+ if (!(np->n_flag & NREVOKE) && !(nofp->nof_flags & NFS_OPEN_FILE_LOST)) {
+ if (nofp->nof_opencnt && !force)
+ NP(np, "nfs_vnop_reclaim: file still open: %d", nofp->nof_opencnt);
+ if (!force && (nofp->nof_access || nofp->nof_deny ||
+ nofp->nof_mmap_access || nofp->nof_mmap_deny ||
+ nofp->nof_r || nofp->nof_w || nofp->nof_rw ||
+ nofp->nof_r_dw || nofp->nof_w_dw || nofp->nof_rw_dw ||
+ nofp->nof_r_drw || nofp->nof_w_drw || nofp->nof_rw_drw ||
+ nofp->nof_d_r || nofp->nof_d_w || nofp->nof_d_rw ||
+ nofp->nof_d_r_dw || nofp->nof_d_w_dw || nofp->nof_d_rw_dw ||
+ nofp->nof_d_r_drw || nofp->nof_d_w_drw || nofp->nof_d_rw_drw)) {
+ NP(np, "nfs_vnop_reclaim: non-zero access: %d %d %d %d # %u.%u %u.%u %u.%u dw %u.%u %u.%u %u.%u drw %u.%u %u.%u %u.%u",
+ nofp->nof_access, nofp->nof_deny,
+ nofp->nof_mmap_access, nofp->nof_mmap_deny,
+ nofp->nof_r, nofp->nof_d_r,
+ nofp->nof_w, nofp->nof_d_w,
+ nofp->nof_rw, nofp->nof_d_rw,
+ nofp->nof_r_dw, nofp->nof_d_r_dw,
+ nofp->nof_w_dw, nofp->nof_d_w_dw,
+ nofp->nof_rw_dw, nofp->nof_d_rw_dw,
+ nofp->nof_r_drw, nofp->nof_d_r_drw,
+ nofp->nof_w_drw, nofp->nof_d_w_drw,
+ nofp->nof_rw_drw, nofp->nof_d_rw_drw);
+ /* try sending a close RPC if it wasn't delegated */
+ if (nofp->nof_r || nofp->nof_w || nofp->nof_rw ||
+ nofp->nof_r_dw || nofp->nof_w_dw || nofp->nof_rw_dw ||
+ nofp->nof_r_drw || nofp->nof_w_drw || nofp->nof_rw_drw)
+ nfs4_close_rpc(np, nofp, NULL, nofp->nof_owner->noo_cred, R_RECOVER);
+ }
+ }
+ TAILQ_REMOVE(&np->n_opens, nofp, nof_link);
+ nfs_open_file_destroy(nofp);
+ }
+ lck_mtx_unlock(&np->n_openlock);
+
+ if (np->n_monlink.le_next != NFSNOLIST) {
+ /* Wait for any in-progress getattr to complete, */
+ /* then remove this node from the monitored node list. */
+ lck_mtx_lock(&nmp->nm_lock);
+ while (np->n_mflag & NMMONSCANINPROG) {
+ struct timespec ts = { 1, 0 };
+ np->n_mflag |= NMMONSCANWANT;
+ msleep(&np->n_mflag, &nmp->nm_lock, PZERO-1, "nfswaitmonscan", &ts);
+ }
+ if (np->n_monlink.le_next != NFSNOLIST) {
+ LIST_REMOVE(np, n_monlink);
+ np->n_monlink.le_next = NFSNOLIST;
+ }
+ lck_mtx_unlock(&nmp->nm_lock);
+ }
+
+ lck_mtx_lock(nfs_buf_mutex);
+ if (!force && (!LIST_EMPTY(&np->n_dirtyblkhd) || !LIST_EMPTY(&np->n_cleanblkhd)))
+ NP(np, "nfs_reclaim: dropping %s buffers", (!LIST_EMPTY(&np->n_dirtyblkhd) ? "dirty" : "clean"));
+ lck_mtx_unlock(nfs_buf_mutex);
+ nfs_vinvalbuf(vp, V_IGNORE_WRITEERR, ap->a_context, 0);
+
+ lck_mtx_lock(nfs_node_hash_mutex);
+
+ if ((vnode_vtype(vp) != VDIR) && np->n_sillyrename) {
+ if (!force)
+ NP(np, "nfs_reclaim: leaving unlinked file %s", np->n_sillyrename->nsr_name);
+ if (np->n_sillyrename->nsr_cred != NOCRED)
+ kauth_cred_unref(&np->n_sillyrename->nsr_cred);
+ vnode_rele(NFSTOV(np->n_sillyrename->nsr_dnp));
+ FREE_ZONE(np->n_sillyrename, sizeof(*np->n_sillyrename), M_NFSREQ);
+ }
vnode_removefsref(vp);
- if (np->n_flag & NHASHED) {
- lck_mtx_lock(nfs_node_hash_mutex);
+ if (np->n_hflag & NHHASHED) {
LIST_REMOVE(np, n_hash);
- np->n_flag &= ~NHASHED;
- lck_mtx_unlock(nfs_node_hash_mutex);
+ np->n_hflag &= ~NHHASHED;
+ FSDBG(266, 0, np, np->n_flag, 0xb1eb1e);
}
+ lck_mtx_unlock(nfs_node_hash_mutex);
/*
- * Free up any directory cookie structures and
- * large file handle structures that might be associated with
- * this nfs node.
+ * Free up any directory cookie structures and large file handle
+ * structures that might be associated with this nfs node.
*/
- if (vnode_vtype(vp) == VDIR) {
- dp = np->n_cookies.lh_first;
- while (dp) {
- dp2 = dp;
- dp = dp->ndm_list.le_next;
- FREE_ZONE((caddr_t)dp2,
- sizeof (struct nfsdmap), M_NFSDIROFF);
- }
- }
- if (np->n_fhsize > NFS_SMALLFH) {
+ nfs_node_lock_force(np);
+ if ((vnode_vtype(vp) == VDIR) && np->n_cookiecache)
+ FREE_ZONE(np->n_cookiecache, sizeof(struct nfsdmap), M_NFSDIROFF);
+ if (np->n_fhsize > NFS_SMALLFH)
FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
- }
+ if (np->n_vattr.nva_acl)
+ kauth_acl_free(np->n_vattr.nva_acl);
+ nfs_node_unlock(np);
vnode_clearfsnode(vp);
+ if (np->n_parent) {
+ if (!vnode_get(np->n_parent)) {
+ vnode_rele(np->n_parent);
+ vnode_put(np->n_parent);
+ }
+ np->n_parent = NULL;
+ }
+
+ lck_mtx_destroy(&np->n_lock, nfs_node_lck_grp);
+ lck_rw_destroy(&np->n_datalock, nfs_data_lck_grp);
+ lck_mtx_destroy(&np->n_openlock, nfs_open_grp);
+
+ FSDBG_BOT(265, vp, np, np->n_flag, 0xd1ed1e);
FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
return (0);
}
+/*
+ * Acquire an NFS node lock
+ */
+
+int
+nfs_node_lock_internal(nfsnode_t np, int force)
+{
+ FSDBG_TOP(268, np, force, 0, 0);
+ lck_mtx_lock(&np->n_lock);
+ if (!force && !(np->n_hflag && NHHASHED)) {
+ FSDBG_BOT(268, np, 0xdead, 0, 0);
+ lck_mtx_unlock(&np->n_lock);
+ return (ENOENT);
+ }
+ FSDBG_BOT(268, np, force, 0, 0);
+ return (0);
+}
+
+int
+nfs_node_lock(nfsnode_t np)
+{
+ return nfs_node_lock_internal(np, 0);
+}
+
+void
+nfs_node_lock_force(nfsnode_t np)
+{
+ nfs_node_lock_internal(np, 1);
+}
+
+/*
+ * Release an NFS node lock
+ */
+void
+nfs_node_unlock(nfsnode_t np)
+{
+ FSDBG(269, np, current_thread(), 0, 0);
+ lck_mtx_unlock(&np->n_lock);
+}
+
+/*
+ * Acquire 2 NFS node locks
+ * - locks taken in reverse address order
+ * - both or neither of the locks are taken
+ * - only one lock taken per node (dup nodes are skipped)
+ */
+int
+nfs_node_lock2(nfsnode_t np1, nfsnode_t np2)
+{
+ nfsnode_t first, second;
+ int error;
+
+ first = (np1 > np2) ? np1 : np2;
+ second = (np1 > np2) ? np2 : np1;
+ if ((error = nfs_node_lock(first)))
+ return (error);
+ if (np1 == np2)
+ return (error);
+ if ((error = nfs_node_lock(second)))
+ nfs_node_unlock(first);
+ return (error);
+}
+
+void
+nfs_node_unlock2(nfsnode_t np1, nfsnode_t np2)
+{
+ nfs_node_unlock(np1);
+ if (np1 != np2)
+ nfs_node_unlock(np2);
+}
+
+/*
+ * Manage NFS node busy state.
+ * (Similar to NFS node locks above)
+ */
+int
+nfs_node_set_busy(nfsnode_t np, thread_t thd)
+{
+ struct timespec ts = { 2, 0 };
+ int error;
+
+ if ((error = nfs_node_lock(np)))
+ return (error);
+ while (ISSET(np->n_flag, NBUSY)) {
+ SET(np->n_flag, NBUSYWANT);
+ msleep(np, &np->n_lock, PZERO-1, "nfsbusywant", &ts);
+ if ((error = nfs_sigintr(NFSTONMP(np), NULL, thd, 0)))
+ break;
+ }
+ if (!error)
+ SET(np->n_flag, NBUSY);
+ nfs_node_unlock(np);
+ return (error);
+}
+
+void
+nfs_node_clear_busy(nfsnode_t np)
+{
+ int wanted;
+
+ nfs_node_lock_force(np);
+ wanted = ISSET(np->n_flag, NBUSYWANT);
+ CLR(np->n_flag, NBUSY|NBUSYWANT);
+ nfs_node_unlock(np);
+ if (wanted)
+ wakeup(np);
+}
+
+int
+nfs_node_set_busy2(nfsnode_t np1, nfsnode_t np2, thread_t thd)
+{
+ nfsnode_t first, second;
+ int error;
+
+ first = (np1 > np2) ? np1 : np2;
+ second = (np1 > np2) ? np2 : np1;
+ if ((error = nfs_node_set_busy(first, thd)))
+ return (error);
+ if (np1 == np2)
+ return (error);
+ if ((error = nfs_node_set_busy(second, thd)))
+ nfs_node_clear_busy(first);
+ return (error);
+}
+
+void
+nfs_node_clear_busy2(nfsnode_t np1, nfsnode_t np2)
+{
+ nfs_node_clear_busy(np1);
+ if (np1 != np2)
+ nfs_node_clear_busy(np2);
+}
+
+/* helper function to sort four nodes in reverse address order (no dupes) */
+static void
+nfs_node_sort4(nfsnode_t np1, nfsnode_t np2, nfsnode_t np3, nfsnode_t np4, nfsnode_t *list, int *lcntp)
+{
+ nfsnode_t na[2], nb[2];
+ int a, b, i, lcnt;
+
+ /* sort pairs then merge */
+ na[0] = (np1 > np2) ? np1 : np2;
+ na[1] = (np1 > np2) ? np2 : np1;
+ nb[0] = (np3 > np4) ? np3 : np4;
+ nb[1] = (np3 > np4) ? np4 : np3;
+ for (a = b = i = lcnt = 0; i < 4; i++) {
+ if (a >= 2)
+ list[lcnt] = nb[b++];
+ else if ((b >= 2) || (na[a] >= nb[b]))
+ list[lcnt] = na[a++];
+ else
+ list[lcnt] = nb[b++];
+ if ((lcnt <= 0) || (list[lcnt] != list[lcnt-1]))
+ lcnt++; /* omit dups */
+ }
+ if (list[lcnt-1] == NULL)
+ lcnt--;
+ *lcntp = lcnt;
+}
+
+int
+nfs_node_set_busy4(nfsnode_t np1, nfsnode_t np2, nfsnode_t np3, nfsnode_t np4, thread_t thd)
+{
+ nfsnode_t list[4];
+ int i, lcnt, error;
+
+ nfs_node_sort4(np1, np2, np3, np4, list, &lcnt);
+
+ /* Now we can lock using list[0 - lcnt-1] */
+ for (i = 0; i < lcnt; ++i)
+ if ((error = nfs_node_set_busy(list[i], thd))) {
+ /* Drop any locks we acquired. */
+ while (--i >= 0)
+ nfs_node_clear_busy(list[i]);
+ return (error);
+ }
+ return (0);
+}
+
+void
+nfs_node_clear_busy4(nfsnode_t np1, nfsnode_t np2, nfsnode_t np3, nfsnode_t np4)
+{
+ nfsnode_t list[4];
+ int lcnt;
+
+ nfs_node_sort4(np1, np2, np3, np4, list, &lcnt);
+ while (--lcnt >= 0)
+ nfs_node_clear_busy(list[lcnt]);
+}
+
+/*
+ * Acquire an NFS node data lock
+ */
+void
+nfs_data_lock(nfsnode_t np, int locktype)
+{
+ nfs_data_lock_internal(np, locktype, 1);
+}
+void
+nfs_data_lock_noupdate(nfsnode_t np, int locktype)
+{
+ nfs_data_lock_internal(np, locktype, 0);
+}
+void
+nfs_data_lock_internal(nfsnode_t np, int locktype, int updatesize)
+{
+ FSDBG_TOP(270, np, locktype, np->n_datalockowner, 0);
+ if (locktype == NFS_DATA_LOCK_SHARED) {
+ if (updatesize && ISSET(np->n_flag, NUPDATESIZE))
+ nfs_data_update_size(np, 0);
+ lck_rw_lock_shared(&np->n_datalock);
+ } else {
+ lck_rw_lock_exclusive(&np->n_datalock);
+ np->n_datalockowner = current_thread();
+ if (updatesize && ISSET(np->n_flag, NUPDATESIZE))
+ nfs_data_update_size(np, 1);
+ }
+ FSDBG_BOT(270, np, locktype, np->n_datalockowner, 0);
+}
+
+/*
+ * Release an NFS node data lock
+ */
+void
+nfs_data_unlock(nfsnode_t np)
+{
+ nfs_data_unlock_internal(np, 1);
+}
+void
+nfs_data_unlock_noupdate(nfsnode_t np)
+{
+ nfs_data_unlock_internal(np, 0);
+}
+void
+nfs_data_unlock_internal(nfsnode_t np, int updatesize)
+{
+ int mine = (np->n_datalockowner == current_thread());
+ FSDBG_TOP(271, np, np->n_datalockowner, current_thread(), 0);
+ if (updatesize && mine && ISSET(np->n_flag, NUPDATESIZE))
+ nfs_data_update_size(np, 1);
+ np->n_datalockowner = NULL;
+ lck_rw_done(&np->n_datalock);
+ if (updatesize && !mine && ISSET(np->n_flag, NUPDATESIZE))
+ nfs_data_update_size(np, 0);
+ FSDBG_BOT(271, np, np->n_datalockowner, current_thread(), 0);
+}
+
+
+/*
+ * update an NFS node's size
+ */
+void
+nfs_data_update_size(nfsnode_t np, int datalocked)
+{
+ int error;
+
+ FSDBG_TOP(272, np, np->n_flag, np->n_size, np->n_newsize);
+ if (!datalocked) {
+ nfs_data_lock(np, NFS_DATA_LOCK_EXCLUSIVE);
+ /* grabbing data lock will automatically update size */
+ nfs_data_unlock(np);
+ FSDBG_BOT(272, np, np->n_flag, np->n_size, np->n_newsize);
+ return;
+ }
+ error = nfs_node_lock(np);
+ if (error || !ISSET(np->n_flag, NUPDATESIZE)) {
+ if (!error)
+ nfs_node_unlock(np);
+ FSDBG_BOT(272, np, np->n_flag, np->n_size, np->n_newsize);
+ return;
+ }
+ CLR(np->n_flag, NUPDATESIZE);
+ np->n_size = np->n_newsize;
+ /* make sure we invalidate buffers the next chance we get */
+ SET(np->n_flag, NNEEDINVALIDATE);
+ nfs_node_unlock(np);
+ ubc_setsize(NFSTOV(np), (off_t)np->n_size); /* XXX error? */
+ FSDBG_BOT(272, np, np->n_flag, np->n_size, np->n_newsize);
+}
+
+#define DODEBUG 1
+
+int
+nfs_mount_is_dirty(mount_t mp)
+{
+ u_long i;
+ nfsnode_t np;
+#ifdef DODEBUG
+ struct timeval now, then, diff;
+ u_long ncnt = 0;
+ microuptime(&now);
+#endif
+ lck_mtx_lock(nfs_node_hash_mutex);
+ for (i = 0; i <= nfsnodehash; i++) {
+ LIST_FOREACH(np, &nfsnodehashtbl[i], n_hash) {
+#ifdef DODEBUG
+ ncnt++;
+#endif
+ if (np->n_mount == mp && !LIST_EMPTY(&np->n_dirtyblkhd))
+ goto out;
+ }
+ }
+out:
+ lck_mtx_unlock(nfs_node_hash_mutex);
+#ifdef DODEBUG
+ microuptime(&then);
+ timersub(&then, &now, &diff);
+
+ NFS_DBG(NFS_FAC_SOCK, 7, "mount_is_dirty for %s took %lld mics for %ld slots and %ld nodes return %d\n",
+ vfs_statfs(mp)->f_mntfromname, (uint64_t)diff.tv_sec * 1000000LL + diff.tv_usec, i, ncnt, (i <= nfsnodehash));
+#endif
+
+ return (i <= nfsnodehash);
+}
projects / apple / xnu.git / blobdiff