4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/sched.h>
19 #include <linux/time.h>
20 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/stat.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/sunrpc/clnt.h>
27 #include <linux/sunrpc/stats.h>
28 #include <linux/sunrpc/metrics.h>
29 #include <linux/nfs_fs.h>
30 #include <linux/nfs_mount.h>
31 #include <linux/nfs4_mount.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/nfs_idmap.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
39 #include <linux/slab.h>
40 #include <linux/compat.h>
42 #include <asm/system.h>
43 #include <asm/uaccess.h>
47 #include "delegation.h"
51 #include "dns_resolve.h"
54 #define NFSDBG_FACILITY NFSDBG_VFS
56 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
58 /* Default is to see 64-bit inode numbers */
59 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
61 static void nfs_invalidate_inode(struct inode *);
62 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
64 static struct kmem_cache * nfs_inode_cachep;
66 static inline unsigned long
67 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
69 return nfs_fileid_to_ino_t(fattr->fileid);
73 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
74 * @word: long word containing the bit lock
76 int nfs_wait_bit_killable(void *word)
78 if (fatal_signal_pending(current))
85 * nfs_compat_user_ino64 - returns the user-visible inode number
86 * @fileid: 64-bit fileid
88 * This function returns a 32-bit inode number if the boot parameter
89 * nfs.enable_ino64 is zero.
91 u64 nfs_compat_user_ino64(u64 fileid)
102 if (sizeof(ino) < sizeof(fileid))
103 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
107 static void nfs_clear_inode(struct inode *inode)
110 * The following should never happen...
112 BUG_ON(nfs_have_writebacks(inode));
113 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
114 nfs_zap_acl_cache(inode);
115 nfs_access_zap_cache(inode);
116 nfs_fscache_release_inode_cookie(inode);
119 void nfs_evict_inode(struct inode *inode)
121 truncate_inode_pages(&inode->i_data, 0);
122 end_writeback(inode);
123 nfs_clear_inode(inode);
127 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
129 int nfs_sync_mapping(struct address_space *mapping)
133 if (mapping->nrpages != 0) {
134 unmap_mapping_range(mapping, 0, 0, 0);
135 ret = nfs_wb_all(mapping->host);
141 * Invalidate the local caches
143 static void nfs_zap_caches_locked(struct inode *inode)
145 struct nfs_inode *nfsi = NFS_I(inode);
146 int mode = inode->i_mode;
148 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
150 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
151 nfsi->attrtimeo_timestamp = jiffies;
153 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
154 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
155 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
157 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
160 void nfs_zap_caches(struct inode *inode)
162 spin_lock(&inode->i_lock);
163 nfs_zap_caches_locked(inode);
164 spin_unlock(&inode->i_lock);
167 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
169 if (mapping->nrpages != 0) {
170 spin_lock(&inode->i_lock);
171 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
172 spin_unlock(&inode->i_lock);
176 void nfs_zap_acl_cache(struct inode *inode)
178 void (*clear_acl_cache)(struct inode *);
180 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
181 if (clear_acl_cache != NULL)
182 clear_acl_cache(inode);
183 spin_lock(&inode->i_lock);
184 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
185 spin_unlock(&inode->i_lock);
188 void nfs_invalidate_atime(struct inode *inode)
190 spin_lock(&inode->i_lock);
191 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
192 spin_unlock(&inode->i_lock);
196 * Invalidate, but do not unhash, the inode.
197 * NB: must be called with inode->i_lock held!
199 static void nfs_invalidate_inode(struct inode *inode)
201 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
202 nfs_zap_caches_locked(inode);
205 struct nfs_find_desc {
207 struct nfs_fattr *fattr;
211 * In NFSv3 we can have 64bit inode numbers. In order to support
212 * this, and re-exported directories (also seen in NFSv2)
213 * we are forced to allow 2 different inodes to have the same
217 nfs_find_actor(struct inode *inode, void *opaque)
219 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
220 struct nfs_fh *fh = desc->fh;
221 struct nfs_fattr *fattr = desc->fattr;
223 if (NFS_FILEID(inode) != fattr->fileid)
225 if (nfs_compare_fh(NFS_FH(inode), fh))
227 if (is_bad_inode(inode) || NFS_STALE(inode))
233 nfs_init_locked(struct inode *inode, void *opaque)
235 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
236 struct nfs_fattr *fattr = desc->fattr;
238 set_nfs_fileid(inode, fattr->fileid);
239 nfs_copy_fh(NFS_FH(inode), desc->fh);
244 * This is our front-end to iget that looks up inodes by file handle
245 * instead of inode number.
248 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
250 struct nfs_find_desc desc = {
254 struct inode *inode = ERR_PTR(-ENOENT);
257 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
259 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
262 hash = nfs_fattr_to_ino_t(fattr);
264 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
266 inode = ERR_PTR(-ENOMEM);
270 if (inode->i_state & I_NEW) {
271 struct nfs_inode *nfsi = NFS_I(inode);
272 unsigned long now = jiffies;
274 /* We set i_ino for the few things that still rely on it,
278 /* We can't support update_atime(), since the server will reset it */
279 inode->i_flags |= S_NOATIME|S_NOCMTIME;
280 inode->i_mode = fattr->mode;
281 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
282 && nfs_server_capable(inode, NFS_CAP_MODE))
283 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
284 | NFS_INO_INVALID_ACCESS
285 | NFS_INO_INVALID_ACL;
286 /* Why so? Because we want revalidate for devices/FIFOs, and
287 * that's precisely what we have in nfs_file_inode_operations.
289 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
290 if (S_ISREG(inode->i_mode)) {
291 inode->i_fop = &nfs_file_operations;
292 inode->i_data.a_ops = &nfs_file_aops;
293 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
294 } else if (S_ISDIR(inode->i_mode)) {
295 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
296 inode->i_fop = &nfs_dir_operations;
297 inode->i_data.a_ops = &nfs_dir_aops;
298 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
299 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
300 /* Deal with crossing mountpoints */
301 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
302 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
303 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
304 inode->i_op = &nfs_referral_inode_operations;
306 inode->i_op = &nfs_mountpoint_inode_operations;
308 inode->i_flags |= S_AUTOMOUNT;
310 } else if (S_ISLNK(inode->i_mode))
311 inode->i_op = &nfs_symlink_inode_operations;
313 init_special_inode(inode, inode->i_mode, fattr->rdev);
315 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
316 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
317 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
318 nfsi->change_attr = 0;
324 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
326 nfsi->read_cache_jiffies = fattr->time_start;
327 nfsi->attr_gencount = fattr->gencount;
328 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
329 inode->i_atime = fattr->atime;
330 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
331 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
332 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
333 inode->i_mtime = fattr->mtime;
334 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
335 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
336 | NFS_INO_INVALID_DATA;
337 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
338 inode->i_ctime = fattr->ctime;
339 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
340 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
341 | NFS_INO_INVALID_ACCESS
342 | NFS_INO_INVALID_ACL;
343 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
344 nfsi->change_attr = fattr->change_attr;
345 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
346 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
347 | NFS_INO_INVALID_DATA;
348 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
349 inode->i_size = nfs_size_to_loff_t(fattr->size);
351 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
352 | NFS_INO_INVALID_DATA
353 | NFS_INO_REVAL_PAGECACHE;
354 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
355 inode->i_nlink = fattr->nlink;
356 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
357 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
358 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
359 inode->i_uid = fattr->uid;
360 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
361 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
362 | NFS_INO_INVALID_ACCESS
363 | NFS_INO_INVALID_ACL;
364 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
365 inode->i_gid = fattr->gid;
366 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
367 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
368 | NFS_INO_INVALID_ACCESS
369 | NFS_INO_INVALID_ACL;
370 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
371 inode->i_blocks = fattr->du.nfs2.blocks;
372 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
374 * report the blocks in 512byte units
376 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
378 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
379 nfsi->attrtimeo_timestamp = now;
380 nfsi->access_cache = RB_ROOT;
382 nfs_fscache_init_inode_cookie(inode);
384 unlock_new_inode(inode);
386 nfs_refresh_inode(inode, fattr);
387 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
389 (long long)NFS_FILEID(inode),
390 atomic_read(&inode->i_count));
396 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
400 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
403 nfs_setattr(struct dentry *dentry, struct iattr *attr)
405 struct inode *inode = dentry->d_inode;
406 struct nfs_fattr *fattr;
409 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
411 /* skip mode change if it's just for clearing setuid/setgid */
412 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
413 attr->ia_valid &= ~ATTR_MODE;
415 if (attr->ia_valid & ATTR_SIZE) {
416 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
417 attr->ia_valid &= ~ATTR_SIZE;
420 /* Optimization: if the end result is no change, don't RPC */
421 attr->ia_valid &= NFS_VALID_ATTRS;
422 if ((attr->ia_valid & ~ATTR_FILE) == 0)
425 /* Write all dirty data */
426 if (S_ISREG(inode->i_mode))
429 fattr = nfs_alloc_fattr();
433 * Return any delegations if we're going to change ACLs
435 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
436 nfs_inode_return_delegation(inode);
437 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
439 nfs_refresh_inode(inode, fattr);
440 nfs_free_fattr(fattr);
446 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
447 * @inode: inode of the file used
448 * @offset: file offset to start truncating
450 * This is a copy of the common vmtruncate, but with the locking
451 * corrected to take into account the fact that NFS requires
452 * inode->i_size to be updated under the inode->i_lock.
454 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
459 err = inode_newsize_ok(inode, offset);
463 spin_lock(&inode->i_lock);
464 oldsize = inode->i_size;
465 i_size_write(inode, offset);
466 spin_unlock(&inode->i_lock);
468 truncate_pagecache(inode, oldsize, offset);
474 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
475 * @inode: pointer to struct inode
476 * @attr: pointer to struct iattr
478 * Note: we do this in the *proc.c in order to ensure that
479 * it works for things like exclusive creates too.
481 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
483 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
484 spin_lock(&inode->i_lock);
485 if ((attr->ia_valid & ATTR_MODE) != 0) {
486 int mode = attr->ia_mode & S_IALLUGO;
487 mode |= inode->i_mode & ~S_IALLUGO;
488 inode->i_mode = mode;
490 if ((attr->ia_valid & ATTR_UID) != 0)
491 inode->i_uid = attr->ia_uid;
492 if ((attr->ia_valid & ATTR_GID) != 0)
493 inode->i_gid = attr->ia_gid;
494 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
495 spin_unlock(&inode->i_lock);
497 if ((attr->ia_valid & ATTR_SIZE) != 0) {
498 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
499 nfs_vmtruncate(inode, attr->ia_size);
503 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
505 struct inode *inode = dentry->d_inode;
506 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
509 /* Flush out writes to the server in order to update c/mtime. */
510 if (S_ISREG(inode->i_mode)) {
511 err = filemap_write_and_wait(inode->i_mapping);
517 * We may force a getattr if the user cares about atime.
519 * Note that we only have to check the vfsmount flags here:
520 * - NFS always sets S_NOATIME by so checking it would give a
522 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
523 * no point in checking those.
525 if ((mnt->mnt_flags & MNT_NOATIME) ||
526 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
530 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
532 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
534 generic_fillattr(inode, stat);
535 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
541 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
543 atomic_set(&l_ctx->count, 1);
544 l_ctx->lockowner = current->files;
545 l_ctx->pid = current->tgid;
546 INIT_LIST_HEAD(&l_ctx->list);
549 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
551 struct nfs_lock_context *pos;
553 list_for_each_entry(pos, &ctx->lock_context.list, list) {
554 if (pos->lockowner != current->files)
556 if (pos->pid != current->tgid)
558 atomic_inc(&pos->count);
564 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
566 struct nfs_lock_context *res, *new = NULL;
567 struct inode *inode = ctx->path.dentry->d_inode;
569 spin_lock(&inode->i_lock);
570 res = __nfs_find_lock_context(ctx);
572 spin_unlock(&inode->i_lock);
573 new = kmalloc(sizeof(*new), GFP_KERNEL);
576 nfs_init_lock_context(new);
577 spin_lock(&inode->i_lock);
578 res = __nfs_find_lock_context(ctx);
580 list_add_tail(&new->list, &ctx->lock_context.list);
581 new->open_context = ctx;
586 spin_unlock(&inode->i_lock);
591 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
593 struct nfs_open_context *ctx = l_ctx->open_context;
594 struct inode *inode = ctx->path.dentry->d_inode;
596 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
598 list_del(&l_ctx->list);
599 spin_unlock(&inode->i_lock);
604 * nfs_close_context - Common close_context() routine NFSv2/v3
605 * @ctx: pointer to context
606 * @is_sync: is this a synchronous close
608 * always ensure that the attributes are up to date if we're mounted
609 * with close-to-open semantics
611 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
614 struct nfs_server *server;
616 if (!(ctx->mode & FMODE_WRITE))
620 inode = ctx->path.dentry->d_inode;
621 if (!list_empty(&NFS_I(inode)->open_files))
623 server = NFS_SERVER(inode);
624 if (server->flags & NFS_MOUNT_NOCTO)
626 nfs_revalidate_inode(server, inode);
629 struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
631 struct nfs_open_context *ctx;
633 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
636 path_get(&ctx->path);
637 ctx->cred = get_rpccred(cred);
643 nfs_init_lock_context(&ctx->lock_context);
644 ctx->lock_context.open_context = ctx;
645 INIT_LIST_HEAD(&ctx->list);
650 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
653 atomic_inc(&ctx->lock_context.count);
657 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
659 struct inode *inode = ctx->path.dentry->d_inode;
661 if (!list_empty(&ctx->list)) {
662 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
664 list_del(&ctx->list);
665 spin_unlock(&inode->i_lock);
666 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
669 NFS_PROTO(inode)->close_context(ctx, is_sync);
670 if (ctx->cred != NULL)
671 put_rpccred(ctx->cred);
672 path_put(&ctx->path);
676 void put_nfs_open_context(struct nfs_open_context *ctx)
678 __put_nfs_open_context(ctx, 0);
682 * Ensure that mmap has a recent RPC credential for use when writing out
685 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
687 struct inode *inode = filp->f_path.dentry->d_inode;
688 struct nfs_inode *nfsi = NFS_I(inode);
690 filp->private_data = get_nfs_open_context(ctx);
691 spin_lock(&inode->i_lock);
692 list_add(&ctx->list, &nfsi->open_files);
693 spin_unlock(&inode->i_lock);
697 * Given an inode, search for an open context with the desired characteristics
699 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
701 struct nfs_inode *nfsi = NFS_I(inode);
702 struct nfs_open_context *pos, *ctx = NULL;
704 spin_lock(&inode->i_lock);
705 list_for_each_entry(pos, &nfsi->open_files, list) {
706 if (cred != NULL && pos->cred != cred)
708 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
710 ctx = get_nfs_open_context(pos);
713 spin_unlock(&inode->i_lock);
717 static void nfs_file_clear_open_context(struct file *filp)
719 struct inode *inode = filp->f_path.dentry->d_inode;
720 struct nfs_open_context *ctx = nfs_file_open_context(filp);
723 filp->private_data = NULL;
724 spin_lock(&inode->i_lock);
725 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
726 spin_unlock(&inode->i_lock);
727 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
732 * These allocate and release file read/write context information.
734 int nfs_open(struct inode *inode, struct file *filp)
736 struct nfs_open_context *ctx;
737 struct rpc_cred *cred;
739 cred = rpc_lookup_cred();
741 return PTR_ERR(cred);
742 ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
746 nfs_file_set_open_context(filp, ctx);
747 put_nfs_open_context(ctx);
748 nfs_fscache_set_inode_cookie(inode, filp);
752 int nfs_release(struct inode *inode, struct file *filp)
754 nfs_file_clear_open_context(filp);
759 * This function is called whenever some part of NFS notices that
760 * the cached attributes have to be refreshed.
763 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
765 int status = -ESTALE;
766 struct nfs_fattr *fattr = NULL;
767 struct nfs_inode *nfsi = NFS_I(inode);
769 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
770 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
772 if (is_bad_inode(inode))
774 if (NFS_STALE(inode))
778 fattr = nfs_alloc_fattr();
782 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
783 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
785 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
787 (long long)NFS_FILEID(inode), status);
788 if (status == -ESTALE) {
789 nfs_zap_caches(inode);
790 if (!S_ISDIR(inode->i_mode))
791 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
796 status = nfs_refresh_inode(inode, fattr);
798 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
800 (long long)NFS_FILEID(inode), status);
804 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
805 nfs_zap_acl_cache(inode);
807 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
809 (long long)NFS_FILEID(inode));
812 nfs_free_fattr(fattr);
816 int nfs_attribute_timeout(struct inode *inode)
818 struct nfs_inode *nfsi = NFS_I(inode);
820 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
823 static int nfs_attribute_cache_expired(struct inode *inode)
825 if (nfs_have_delegated_attributes(inode))
827 return nfs_attribute_timeout(inode);
831 * nfs_revalidate_inode - Revalidate the inode attributes
832 * @server - pointer to nfs_server struct
833 * @inode - pointer to inode struct
835 * Updates inode attribute information by retrieving the data from the server.
837 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
839 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
840 && !nfs_attribute_cache_expired(inode))
841 return NFS_STALE(inode) ? -ESTALE : 0;
842 return __nfs_revalidate_inode(server, inode);
845 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
847 struct nfs_inode *nfsi = NFS_I(inode);
849 if (mapping->nrpages != 0) {
850 int ret = invalidate_inode_pages2(mapping);
854 spin_lock(&inode->i_lock);
855 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
856 if (S_ISDIR(inode->i_mode))
857 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
858 spin_unlock(&inode->i_lock);
859 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
860 nfs_fscache_reset_inode_cookie(inode);
861 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
862 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
867 * nfs_revalidate_mapping - Revalidate the pagecache
868 * @inode - pointer to host inode
869 * @mapping - pointer to mapping
871 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
873 struct nfs_inode *nfsi = NFS_I(inode);
876 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
877 || nfs_attribute_cache_expired(inode)
878 || NFS_STALE(inode)) {
879 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
883 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
884 ret = nfs_invalidate_mapping(inode, mapping);
889 static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
891 struct nfs_inode *nfsi = NFS_I(inode);
892 unsigned long ret = 0;
894 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
895 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
896 && nfsi->change_attr == fattr->pre_change_attr) {
897 nfsi->change_attr = fattr->change_attr;
898 if (S_ISDIR(inode->i_mode))
899 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
900 ret |= NFS_INO_INVALID_ATTR;
902 /* If we have atomic WCC data, we may update some attributes */
903 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
904 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
905 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
906 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
907 ret |= NFS_INO_INVALID_ATTR;
910 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
911 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
912 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
913 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
914 if (S_ISDIR(inode->i_mode))
915 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
916 ret |= NFS_INO_INVALID_ATTR;
918 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
919 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
920 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
921 && nfsi->npages == 0) {
922 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
923 ret |= NFS_INO_INVALID_ATTR;
929 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
930 * @inode - pointer to inode
931 * @fattr - updated attributes
933 * Verifies the attribute cache. If we have just changed the attributes,
934 * so that fattr carries weak cache consistency data, then it may
935 * also update the ctime/mtime/change_attribute.
937 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
939 struct nfs_inode *nfsi = NFS_I(inode);
940 loff_t cur_size, new_isize;
941 unsigned long invalid = 0;
944 /* Has the inode gone and changed behind our back? */
945 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
947 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
950 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
951 nfsi->change_attr != fattr->change_attr)
952 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
954 /* Verify a few of the more important attributes */
955 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
956 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
958 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
959 cur_size = i_size_read(inode);
960 new_isize = nfs_size_to_loff_t(fattr->size);
961 if (cur_size != new_isize && nfsi->npages == 0)
962 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
965 /* Have any file permissions changed? */
966 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
967 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
968 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
969 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
970 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
971 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
973 /* Has the link count changed? */
974 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
975 invalid |= NFS_INO_INVALID_ATTR;
977 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
978 invalid |= NFS_INO_INVALID_ATIME;
981 nfsi->cache_validity |= invalid;
983 nfsi->read_cache_jiffies = fattr->time_start;
987 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
989 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
991 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
994 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
996 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
998 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
1001 static atomic_long_t nfs_attr_generation_counter;
1003 static unsigned long nfs_read_attr_generation_counter(void)
1005 return atomic_long_read(&nfs_attr_generation_counter);
1008 unsigned long nfs_inc_attr_generation_counter(void)
1010 return atomic_long_inc_return(&nfs_attr_generation_counter);
1013 void nfs_fattr_init(struct nfs_fattr *fattr)
1016 fattr->time_start = jiffies;
1017 fattr->gencount = nfs_inc_attr_generation_counter();
1020 struct nfs_fattr *nfs_alloc_fattr(void)
1022 struct nfs_fattr *fattr;
1024 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1026 nfs_fattr_init(fattr);
1030 struct nfs_fh *nfs_alloc_fhandle(void)
1034 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1041 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1042 * @inode - pointer to inode
1043 * @fattr - attributes
1045 * Attempt to divine whether or not an RPC call reply carrying stale
1046 * attributes got scheduled after another call carrying updated ones.
1048 * To do so, the function first assumes that a more recent ctime means
1049 * that the attributes in fattr are newer, however it also attempt to
1050 * catch the case where ctime either didn't change, or went backwards
1051 * (if someone reset the clock on the server) by looking at whether
1052 * or not this RPC call was started after the inode was last updated.
1053 * Note also the check for wraparound of 'attr_gencount'
1055 * The function returns 'true' if it thinks the attributes in 'fattr' are
1056 * more recent than the ones cached in the inode.
1059 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1061 const struct nfs_inode *nfsi = NFS_I(inode);
1063 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1064 nfs_ctime_need_update(inode, fattr) ||
1065 nfs_size_need_update(inode, fattr) ||
1066 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1069 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1071 if (nfs_inode_attrs_need_update(inode, fattr))
1072 return nfs_update_inode(inode, fattr);
1073 return nfs_check_inode_attributes(inode, fattr);
1077 * nfs_refresh_inode - try to update the inode attribute cache
1078 * @inode - pointer to inode
1079 * @fattr - updated attributes
1081 * Check that an RPC call that returned attributes has not overlapped with
1082 * other recent updates of the inode metadata, then decide whether it is
1083 * safe to do a full update of the inode attributes, or whether just to
1084 * call nfs_check_inode_attributes.
1086 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1090 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1092 spin_lock(&inode->i_lock);
1093 status = nfs_refresh_inode_locked(inode, fattr);
1094 spin_unlock(&inode->i_lock);
1099 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1101 struct nfs_inode *nfsi = NFS_I(inode);
1103 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1104 if (S_ISDIR(inode->i_mode))
1105 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1106 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1108 return nfs_refresh_inode_locked(inode, fattr);
1112 * nfs_post_op_update_inode - try to update the inode attribute cache
1113 * @inode - pointer to inode
1114 * @fattr - updated attributes
1116 * After an operation that has changed the inode metadata, mark the
1117 * attribute cache as being invalid, then try to update it.
1119 * NB: if the server didn't return any post op attributes, this
1120 * function will force the retrieval of attributes before the next
1121 * NFS request. Thus it should be used only for operations that
1122 * are expected to change one or more attributes, to avoid
1123 * unnecessary NFS requests and trips through nfs_update_inode().
1125 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1129 spin_lock(&inode->i_lock);
1130 status = nfs_post_op_update_inode_locked(inode, fattr);
1131 spin_unlock(&inode->i_lock);
1136 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1137 * @inode - pointer to inode
1138 * @fattr - updated attributes
1140 * After an operation that has changed the inode metadata, mark the
1141 * attribute cache as being invalid, then try to update it. Fake up
1142 * weak cache consistency data, if none exist.
1144 * This function is mainly designed to be used by the ->write_done() functions.
1146 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1150 spin_lock(&inode->i_lock);
1151 /* Don't do a WCC update if these attributes are already stale */
1152 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1153 !nfs_inode_attrs_need_update(inode, fattr)) {
1154 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1155 | NFS_ATTR_FATTR_PRESIZE
1156 | NFS_ATTR_FATTR_PREMTIME
1157 | NFS_ATTR_FATTR_PRECTIME);
1160 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1161 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1162 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1163 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1165 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1166 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1167 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1168 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1170 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1171 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1172 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1173 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1175 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1176 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1177 fattr->pre_size = i_size_read(inode);
1178 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1181 status = nfs_post_op_update_inode_locked(inode, fattr);
1182 spin_unlock(&inode->i_lock);
1187 * Many nfs protocol calls return the new file attributes after
1188 * an operation. Here we update the inode to reflect the state
1189 * of the server's inode.
1191 * This is a bit tricky because we have to make sure all dirty pages
1192 * have been sent off to the server before calling invalidate_inode_pages.
1193 * To make sure no other process adds more write requests while we try
1194 * our best to flush them, we make them sleep during the attribute refresh.
1196 * A very similar scenario holds for the dir cache.
1198 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1200 struct nfs_server *server;
1201 struct nfs_inode *nfsi = NFS_I(inode);
1202 loff_t cur_isize, new_isize;
1203 unsigned long invalid = 0;
1204 unsigned long now = jiffies;
1205 unsigned long save_cache_validity;
1207 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1208 __func__, inode->i_sb->s_id, inode->i_ino,
1209 atomic_read(&inode->i_count), fattr->valid);
1211 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1215 * Make sure the inode's type hasn't changed.
1217 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1220 server = NFS_SERVER(inode);
1221 /* Update the fsid? */
1222 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1223 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1224 !IS_AUTOMOUNT(inode))
1225 server->fsid = fattr->fsid;
1228 * Update the read time so we don't revalidate too often.
1230 nfsi->read_cache_jiffies = fattr->time_start;
1232 save_cache_validity = nfsi->cache_validity;
1233 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1234 | NFS_INO_INVALID_ATIME
1235 | NFS_INO_REVAL_FORCED
1236 | NFS_INO_REVAL_PAGECACHE);
1238 /* Do atomic weak cache consistency updates */
1239 invalid |= nfs_wcc_update_inode(inode, fattr);
1241 /* More cache consistency checks */
1242 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1243 if (nfsi->change_attr != fattr->change_attr) {
1244 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1245 inode->i_sb->s_id, inode->i_ino);
1246 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1247 if (S_ISDIR(inode->i_mode))
1248 nfs_force_lookup_revalidate(inode);
1249 nfsi->change_attr = fattr->change_attr;
1251 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1252 invalid |= save_cache_validity;
1254 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1255 /* NFSv2/v3: Check if the mtime agrees */
1256 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1257 dprintk("NFS: mtime change on server for file %s/%ld\n",
1258 inode->i_sb->s_id, inode->i_ino);
1259 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1260 if (S_ISDIR(inode->i_mode))
1261 nfs_force_lookup_revalidate(inode);
1262 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1264 } else if (server->caps & NFS_CAP_MTIME)
1265 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1266 | NFS_INO_INVALID_DATA
1267 | NFS_INO_REVAL_PAGECACHE
1268 | NFS_INO_REVAL_FORCED);
1270 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1271 /* If ctime has changed we should definitely clear access+acl caches */
1272 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1273 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1274 /* and probably clear data for a directory too as utimes can cause
1275 * havoc with our cache.
1277 if (S_ISDIR(inode->i_mode)) {
1278 invalid |= NFS_INO_INVALID_DATA;
1279 nfs_force_lookup_revalidate(inode);
1281 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1283 } else if (server->caps & NFS_CAP_CTIME)
1284 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1285 | NFS_INO_INVALID_ACCESS
1286 | NFS_INO_INVALID_ACL
1287 | NFS_INO_REVAL_FORCED);
1289 /* Check if our cached file size is stale */
1290 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1291 new_isize = nfs_size_to_loff_t(fattr->size);
1292 cur_isize = i_size_read(inode);
1293 if (new_isize != cur_isize) {
1294 /* Do we perhaps have any outstanding writes, or has
1295 * the file grown beyond our last write? */
1296 if (nfsi->npages == 0 || new_isize > cur_isize) {
1297 i_size_write(inode, new_isize);
1298 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1300 dprintk("NFS: isize change on server for file %s/%ld\n",
1301 inode->i_sb->s_id, inode->i_ino);
1304 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1305 | NFS_INO_REVAL_PAGECACHE
1306 | NFS_INO_REVAL_FORCED);
1309 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1310 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1311 else if (server->caps & NFS_CAP_ATIME)
1312 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1313 | NFS_INO_REVAL_FORCED);
1315 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1316 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1317 umode_t newmode = inode->i_mode & S_IFMT;
1318 newmode |= fattr->mode & S_IALLUGO;
1319 inode->i_mode = newmode;
1320 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1322 } else if (server->caps & NFS_CAP_MODE)
1323 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1324 | NFS_INO_INVALID_ACCESS
1325 | NFS_INO_INVALID_ACL
1326 | NFS_INO_REVAL_FORCED);
1328 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1329 if (inode->i_uid != fattr->uid) {
1330 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1331 inode->i_uid = fattr->uid;
1333 } else if (server->caps & NFS_CAP_OWNER)
1334 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1335 | NFS_INO_INVALID_ACCESS
1336 | NFS_INO_INVALID_ACL
1337 | NFS_INO_REVAL_FORCED);
1339 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1340 if (inode->i_gid != fattr->gid) {
1341 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1342 inode->i_gid = fattr->gid;
1344 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1345 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1346 | NFS_INO_INVALID_ACCESS
1347 | NFS_INO_INVALID_ACL
1348 | NFS_INO_REVAL_FORCED);
1350 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1351 if (inode->i_nlink != fattr->nlink) {
1352 invalid |= NFS_INO_INVALID_ATTR;
1353 if (S_ISDIR(inode->i_mode))
1354 invalid |= NFS_INO_INVALID_DATA;
1355 inode->i_nlink = fattr->nlink;
1357 } else if (server->caps & NFS_CAP_NLINK)
1358 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1359 | NFS_INO_REVAL_FORCED);
1361 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1363 * report the blocks in 512byte units
1365 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1367 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1368 inode->i_blocks = fattr->du.nfs2.blocks;
1370 /* Update attrtimeo value if we're out of the unstable period */
1371 if (invalid & NFS_INO_INVALID_ATTR) {
1372 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1373 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1374 nfsi->attrtimeo_timestamp = now;
1375 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1377 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1378 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1379 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1380 nfsi->attrtimeo_timestamp = now;
1383 invalid &= ~NFS_INO_INVALID_ATTR;
1384 /* Don't invalidate the data if we were to blame */
1385 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1386 || S_ISLNK(inode->i_mode)))
1387 invalid &= ~NFS_INO_INVALID_DATA;
1388 if (!nfs_have_delegation(inode, FMODE_READ) ||
1389 (save_cache_validity & NFS_INO_REVAL_FORCED))
1390 nfsi->cache_validity |= invalid;
1395 * Big trouble! The inode has become a different object.
1397 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1398 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1401 * No need to worry about unhashing the dentry, as the
1402 * lookup validation will know that the inode is bad.
1403 * (But we fall through to invalidate the caches.)
1405 nfs_invalidate_inode(inode);
1409 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1410 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1411 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1412 (long long)nfsi->fileid, (long long)fattr->fileid);
1417 #ifdef CONFIG_NFS_V4
1420 * Clean out any remaining NFSv4 state that might be left over due
1421 * to open() calls that passed nfs_atomic_lookup, but failed to call
1424 void nfs4_evict_inode(struct inode *inode)
1426 pnfs_destroy_layout(NFS_I(inode));
1427 truncate_inode_pages(&inode->i_data, 0);
1428 end_writeback(inode);
1429 /* If we are holding a delegation, return it! */
1430 nfs_inode_return_delegation_noreclaim(inode);
1431 /* First call standard NFS clear_inode() code */
1432 nfs_clear_inode(inode);
1436 struct inode *nfs_alloc_inode(struct super_block *sb)
1438 struct nfs_inode *nfsi;
1439 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1443 nfsi->cache_validity = 0UL;
1444 #ifdef CONFIG_NFS_V3_ACL
1445 nfsi->acl_access = ERR_PTR(-EAGAIN);
1446 nfsi->acl_default = ERR_PTR(-EAGAIN);
1448 #ifdef CONFIG_NFS_V4
1449 nfsi->nfs4_acl = NULL;
1450 #endif /* CONFIG_NFS_V4 */
1451 return &nfsi->vfs_inode;
1454 static void nfs_i_callback(struct rcu_head *head)
1456 struct inode *inode = container_of(head, struct inode, i_rcu);
1457 INIT_LIST_HEAD(&inode->i_dentry);
1458 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1461 void nfs_destroy_inode(struct inode *inode)
1463 call_rcu(&inode->i_rcu, nfs_i_callback);
1466 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1468 #ifdef CONFIG_NFS_V4
1469 INIT_LIST_HEAD(&nfsi->open_states);
1470 nfsi->delegation = NULL;
1471 nfsi->delegation_state = 0;
1472 init_rwsem(&nfsi->rwsem);
1473 nfsi->layout = NULL;
1477 static void init_once(void *foo)
1479 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1481 inode_init_once(&nfsi->vfs_inode);
1482 INIT_LIST_HEAD(&nfsi->open_files);
1483 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1484 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1485 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1488 atomic_set(&nfsi->silly_count, 1);
1489 INIT_HLIST_HEAD(&nfsi->silly_list);
1490 init_waitqueue_head(&nfsi->waitqueue);
1491 nfs4_init_once(nfsi);
1494 static int __init nfs_init_inodecache(void)
1496 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1497 sizeof(struct nfs_inode),
1498 0, (SLAB_RECLAIM_ACCOUNT|
1501 if (nfs_inode_cachep == NULL)
1507 static void nfs_destroy_inodecache(void)
1509 kmem_cache_destroy(nfs_inode_cachep);
1512 struct workqueue_struct *nfsiod_workqueue;
1515 * start up the nfsiod workqueue
1517 static int nfsiod_start(void)
1519 struct workqueue_struct *wq;
1520 dprintk("RPC: creating workqueue nfsiod\n");
1521 wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
1524 nfsiod_workqueue = wq;
1529 * Destroy the nfsiod workqueue
1531 static void nfsiod_stop(void)
1533 struct workqueue_struct *wq;
1535 wq = nfsiod_workqueue;
1538 nfsiod_workqueue = NULL;
1539 destroy_workqueue(wq);
1545 static int __init init_nfs_fs(void)
1549 err = nfs_idmap_init();
1553 err = nfs_dns_resolver_init();
1557 err = nfs_fscache_register();
1561 err = nfsiod_start();
1565 err = nfs_fs_proc_init();
1569 err = nfs_init_nfspagecache();
1573 err = nfs_init_inodecache();
1577 err = nfs_init_readpagecache();
1581 err = nfs_init_writepagecache();
1585 err = nfs_init_directcache();
1589 #ifdef CONFIG_PROC_FS
1590 rpc_proc_register(&nfs_rpcstat);
1592 if ((err = register_nfs_fs()) != 0)
1596 #ifdef CONFIG_PROC_FS
1597 rpc_proc_unregister("nfs");
1599 nfs_destroy_directcache();
1601 nfs_destroy_writepagecache();
1603 nfs_destroy_readpagecache();
1605 nfs_destroy_inodecache();
1607 nfs_destroy_nfspagecache();
1613 nfs_fscache_unregister();
1615 nfs_dns_resolver_destroy();
1622 static void __exit exit_nfs_fs(void)
1624 nfs_destroy_directcache();
1625 nfs_destroy_writepagecache();
1626 nfs_destroy_readpagecache();
1627 nfs_destroy_inodecache();
1628 nfs_destroy_nfspagecache();
1629 nfs_fscache_unregister();
1630 nfs_dns_resolver_destroy();
1632 #ifdef CONFIG_PROC_FS
1633 rpc_proc_unregister("nfs");
1635 nfs_cleanup_cb_ident_idr();
1636 unregister_nfs_fs();
1641 /* Not quite true; I just maintain it */
1642 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1643 MODULE_LICENSE("GPL");
1644 module_param(enable_ino64, bool, 0644);
1646 module_init(init_nfs_fs)
1647 module_exit(exit_nfs_fs)