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>
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
50 #include "dns_resolve.h"
52 #define NFSDBG_FACILITY NFSDBG_VFS
54 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
56 /* Default is to see 64-bit inode numbers */
57 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
59 static void nfs_invalidate_inode(struct inode *);
60 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
62 static struct kmem_cache * nfs_inode_cachep;
64 static inline unsigned long
65 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
67 return nfs_fileid_to_ino_t(fattr->fileid);
71 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
72 * @word: long word containing the bit lock
74 int nfs_wait_bit_killable(void *word)
76 if (fatal_signal_pending(current))
83 * nfs_compat_user_ino64 - returns the user-visible inode number
84 * @fileid: 64-bit fileid
86 * This function returns a 32-bit inode number if the boot parameter
87 * nfs.enable_ino64 is zero.
89 u64 nfs_compat_user_ino64(u64 fileid)
96 if (sizeof(ino) < sizeof(fileid))
97 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
101 static void nfs_clear_inode(struct inode *inode)
104 * The following should never happen...
106 BUG_ON(nfs_have_writebacks(inode));
107 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
108 nfs_zap_acl_cache(inode);
109 nfs_access_zap_cache(inode);
110 nfs_fscache_release_inode_cookie(inode);
113 void nfs_evict_inode(struct inode *inode)
115 truncate_inode_pages(&inode->i_data, 0);
116 end_writeback(inode);
117 nfs_clear_inode(inode);
121 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
123 int nfs_sync_mapping(struct address_space *mapping)
127 if (mapping->nrpages != 0) {
128 unmap_mapping_range(mapping, 0, 0, 0);
129 ret = nfs_wb_all(mapping->host);
135 * Invalidate the local caches
137 static void nfs_zap_caches_locked(struct inode *inode)
139 struct nfs_inode *nfsi = NFS_I(inode);
140 int mode = inode->i_mode;
142 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
144 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
145 nfsi->attrtimeo_timestamp = jiffies;
147 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
148 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
149 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
151 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
154 void nfs_zap_caches(struct inode *inode)
156 spin_lock(&inode->i_lock);
157 nfs_zap_caches_locked(inode);
158 spin_unlock(&inode->i_lock);
161 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
163 if (mapping->nrpages != 0) {
164 spin_lock(&inode->i_lock);
165 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
166 spin_unlock(&inode->i_lock);
170 void nfs_zap_acl_cache(struct inode *inode)
172 void (*clear_acl_cache)(struct inode *);
174 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
175 if (clear_acl_cache != NULL)
176 clear_acl_cache(inode);
177 spin_lock(&inode->i_lock);
178 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
179 spin_unlock(&inode->i_lock);
182 void nfs_invalidate_atime(struct inode *inode)
184 spin_lock(&inode->i_lock);
185 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
186 spin_unlock(&inode->i_lock);
190 * Invalidate, but do not unhash, the inode.
191 * NB: must be called with inode->i_lock held!
193 static void nfs_invalidate_inode(struct inode *inode)
195 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
196 nfs_zap_caches_locked(inode);
199 struct nfs_find_desc {
201 struct nfs_fattr *fattr;
205 * In NFSv3 we can have 64bit inode numbers. In order to support
206 * this, and re-exported directories (also seen in NFSv2)
207 * we are forced to allow 2 different inodes to have the same
211 nfs_find_actor(struct inode *inode, void *opaque)
213 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
214 struct nfs_fh *fh = desc->fh;
215 struct nfs_fattr *fattr = desc->fattr;
217 if (NFS_FILEID(inode) != fattr->fileid)
219 if (nfs_compare_fh(NFS_FH(inode), fh))
221 if (is_bad_inode(inode) || NFS_STALE(inode))
227 nfs_init_locked(struct inode *inode, void *opaque)
229 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
230 struct nfs_fattr *fattr = desc->fattr;
232 set_nfs_fileid(inode, fattr->fileid);
233 nfs_copy_fh(NFS_FH(inode), desc->fh);
237 /* Don't use READDIRPLUS on directories that we believe are too large */
238 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
241 * This is our front-end to iget that looks up inodes by file handle
242 * instead of inode number.
245 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
247 struct nfs_find_desc desc = {
251 struct inode *inode = ERR_PTR(-ENOENT);
254 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
256 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
259 hash = nfs_fattr_to_ino_t(fattr);
261 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
263 inode = ERR_PTR(-ENOMEM);
267 if (inode->i_state & I_NEW) {
268 struct nfs_inode *nfsi = NFS_I(inode);
269 unsigned long now = jiffies;
271 /* We set i_ino for the few things that still rely on it,
275 /* We can't support update_atime(), since the server will reset it */
276 inode->i_flags |= S_NOATIME|S_NOCMTIME;
277 inode->i_mode = fattr->mode;
278 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
279 && nfs_server_capable(inode, NFS_CAP_MODE))
280 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
281 | NFS_INO_INVALID_ACCESS
282 | NFS_INO_INVALID_ACL;
283 /* Why so? Because we want revalidate for devices/FIFOs, and
284 * that's precisely what we have in nfs_file_inode_operations.
286 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
287 if (S_ISREG(inode->i_mode)) {
288 inode->i_fop = &nfs_file_operations;
289 inode->i_data.a_ops = &nfs_file_aops;
290 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
291 } else if (S_ISDIR(inode->i_mode)) {
292 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
293 inode->i_fop = &nfs_dir_operations;
294 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
295 && fattr->size <= NFS_LIMIT_READDIRPLUS)
296 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
297 /* Deal with crossing mountpoints */
298 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
299 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
300 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
301 inode->i_op = &nfs_referral_inode_operations;
303 inode->i_op = &nfs_mountpoint_inode_operations;
305 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
307 } else if (S_ISLNK(inode->i_mode))
308 inode->i_op = &nfs_symlink_inode_operations;
310 init_special_inode(inode, inode->i_mode, fattr->rdev);
312 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
313 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
314 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
315 nfsi->change_attr = 0;
321 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
323 nfsi->read_cache_jiffies = fattr->time_start;
324 nfsi->attr_gencount = fattr->gencount;
325 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
326 inode->i_atime = fattr->atime;
327 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
328 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
329 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
330 inode->i_mtime = fattr->mtime;
331 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
332 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
333 | NFS_INO_INVALID_DATA;
334 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
335 inode->i_ctime = fattr->ctime;
336 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
337 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
338 | NFS_INO_INVALID_ACCESS
339 | NFS_INO_INVALID_ACL;
340 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
341 nfsi->change_attr = fattr->change_attr;
342 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
343 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
344 | NFS_INO_INVALID_DATA;
345 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
346 inode->i_size = nfs_size_to_loff_t(fattr->size);
348 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
349 | NFS_INO_INVALID_DATA
350 | NFS_INO_REVAL_PAGECACHE;
351 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
352 inode->i_nlink = fattr->nlink;
353 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
354 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
355 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
356 inode->i_uid = fattr->uid;
357 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
358 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
359 | NFS_INO_INVALID_ACCESS
360 | NFS_INO_INVALID_ACL;
361 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
362 inode->i_gid = fattr->gid;
363 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
364 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
365 | NFS_INO_INVALID_ACCESS
366 | NFS_INO_INVALID_ACL;
367 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
368 inode->i_blocks = fattr->du.nfs2.blocks;
369 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
371 * report the blocks in 512byte units
373 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
375 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
376 nfsi->attrtimeo_timestamp = now;
377 nfsi->access_cache = RB_ROOT;
379 nfs_fscache_init_inode_cookie(inode);
381 unlock_new_inode(inode);
383 nfs_refresh_inode(inode, fattr);
384 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
386 (long long)NFS_FILEID(inode),
387 atomic_read(&inode->i_count));
393 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
397 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
400 nfs_setattr(struct dentry *dentry, struct iattr *attr)
402 struct inode *inode = dentry->d_inode;
403 struct nfs_fattr *fattr;
406 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
408 /* skip mode change if it's just for clearing setuid/setgid */
409 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
410 attr->ia_valid &= ~ATTR_MODE;
412 if (attr->ia_valid & ATTR_SIZE) {
413 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
414 attr->ia_valid &= ~ATTR_SIZE;
417 /* Optimization: if the end result is no change, don't RPC */
418 attr->ia_valid &= NFS_VALID_ATTRS;
419 if ((attr->ia_valid & ~ATTR_FILE) == 0)
422 /* Write all dirty data */
423 if (S_ISREG(inode->i_mode))
426 fattr = nfs_alloc_fattr();
430 * Return any delegations if we're going to change ACLs
432 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
433 nfs_inode_return_delegation(inode);
434 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
436 nfs_refresh_inode(inode, fattr);
437 nfs_free_fattr(fattr);
443 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
444 * @inode: inode of the file used
445 * @offset: file offset to start truncating
447 * This is a copy of the common vmtruncate, but with the locking
448 * corrected to take into account the fact that NFS requires
449 * inode->i_size to be updated under the inode->i_lock.
451 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
456 err = inode_newsize_ok(inode, offset);
460 spin_lock(&inode->i_lock);
461 oldsize = inode->i_size;
462 i_size_write(inode, offset);
463 spin_unlock(&inode->i_lock);
465 truncate_pagecache(inode, oldsize, offset);
471 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
472 * @inode: pointer to struct inode
473 * @attr: pointer to struct iattr
475 * Note: we do this in the *proc.c in order to ensure that
476 * it works for things like exclusive creates too.
478 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
480 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
481 spin_lock(&inode->i_lock);
482 if ((attr->ia_valid & ATTR_MODE) != 0) {
483 int mode = attr->ia_mode & S_IALLUGO;
484 mode |= inode->i_mode & ~S_IALLUGO;
485 inode->i_mode = mode;
487 if ((attr->ia_valid & ATTR_UID) != 0)
488 inode->i_uid = attr->ia_uid;
489 if ((attr->ia_valid & ATTR_GID) != 0)
490 inode->i_gid = attr->ia_gid;
491 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
492 spin_unlock(&inode->i_lock);
494 if ((attr->ia_valid & ATTR_SIZE) != 0) {
495 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
496 nfs_vmtruncate(inode, attr->ia_size);
500 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
502 struct inode *inode = dentry->d_inode;
503 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
506 /* Flush out writes to the server in order to update c/mtime. */
507 if (S_ISREG(inode->i_mode)) {
508 err = filemap_write_and_wait(inode->i_mapping);
514 * We may force a getattr if the user cares about atime.
516 * Note that we only have to check the vfsmount flags here:
517 * - NFS always sets S_NOATIME by so checking it would give a
519 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
520 * no point in checking those.
522 if ((mnt->mnt_flags & MNT_NOATIME) ||
523 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
527 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
529 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
531 generic_fillattr(inode, stat);
532 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
538 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
540 atomic_set(&l_ctx->count, 1);
541 l_ctx->lockowner = current->files;
542 l_ctx->pid = current->tgid;
543 INIT_LIST_HEAD(&l_ctx->list);
546 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
548 struct nfs_lock_context *pos;
550 list_for_each_entry(pos, &ctx->lock_context.list, list) {
551 if (pos->lockowner != current->files)
553 if (pos->pid != current->tgid)
555 atomic_inc(&pos->count);
561 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
563 struct nfs_lock_context *res, *new = NULL;
564 struct inode *inode = ctx->path.dentry->d_inode;
566 spin_lock(&inode->i_lock);
567 res = __nfs_find_lock_context(ctx);
569 spin_unlock(&inode->i_lock);
570 new = kmalloc(sizeof(*new), GFP_KERNEL);
573 nfs_init_lock_context(new);
574 spin_lock(&inode->i_lock);
575 res = __nfs_find_lock_context(ctx);
577 list_add_tail(&new->list, &ctx->lock_context.list);
578 new->open_context = ctx;
583 spin_unlock(&inode->i_lock);
588 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
590 struct nfs_open_context *ctx = l_ctx->open_context;
591 struct inode *inode = ctx->path.dentry->d_inode;
593 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
595 list_del(&l_ctx->list);
596 spin_unlock(&inode->i_lock);
601 * nfs_close_context - Common close_context() routine NFSv2/v3
602 * @ctx: pointer to context
603 * @is_sync: is this a synchronous close
605 * always ensure that the attributes are up to date if we're mounted
606 * with close-to-open semantics
608 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
611 struct nfs_server *server;
613 if (!(ctx->mode & FMODE_WRITE))
617 inode = ctx->path.dentry->d_inode;
618 if (!list_empty(&NFS_I(inode)->open_files))
620 server = NFS_SERVER(inode);
621 if (server->flags & NFS_MOUNT_NOCTO)
623 nfs_revalidate_inode(server, inode);
626 struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
628 struct nfs_open_context *ctx;
630 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
633 path_get(&ctx->path);
634 ctx->cred = get_rpccred(cred);
640 nfs_init_lock_context(&ctx->lock_context);
641 ctx->lock_context.open_context = ctx;
642 INIT_LIST_HEAD(&ctx->list);
647 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
650 atomic_inc(&ctx->lock_context.count);
654 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
656 struct inode *inode = ctx->path.dentry->d_inode;
658 if (!list_empty(&ctx->list)) {
659 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
661 list_del(&ctx->list);
662 spin_unlock(&inode->i_lock);
663 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
666 NFS_PROTO(inode)->close_context(ctx, is_sync);
667 if (ctx->cred != NULL)
668 put_rpccred(ctx->cred);
669 path_put(&ctx->path);
673 void put_nfs_open_context(struct nfs_open_context *ctx)
675 __put_nfs_open_context(ctx, 0);
679 * Ensure that mmap has a recent RPC credential for use when writing out
682 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
684 struct inode *inode = filp->f_path.dentry->d_inode;
685 struct nfs_inode *nfsi = NFS_I(inode);
687 filp->private_data = get_nfs_open_context(ctx);
688 spin_lock(&inode->i_lock);
689 list_add(&ctx->list, &nfsi->open_files);
690 spin_unlock(&inode->i_lock);
694 * Given an inode, search for an open context with the desired characteristics
696 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
698 struct nfs_inode *nfsi = NFS_I(inode);
699 struct nfs_open_context *pos, *ctx = NULL;
701 spin_lock(&inode->i_lock);
702 list_for_each_entry(pos, &nfsi->open_files, list) {
703 if (cred != NULL && pos->cred != cred)
705 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
707 ctx = get_nfs_open_context(pos);
710 spin_unlock(&inode->i_lock);
714 static void nfs_file_clear_open_context(struct file *filp)
716 struct inode *inode = filp->f_path.dentry->d_inode;
717 struct nfs_open_context *ctx = nfs_file_open_context(filp);
720 filp->private_data = NULL;
721 spin_lock(&inode->i_lock);
722 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
723 spin_unlock(&inode->i_lock);
724 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
729 * These allocate and release file read/write context information.
731 int nfs_open(struct inode *inode, struct file *filp)
733 struct nfs_open_context *ctx;
734 struct rpc_cred *cred;
736 cred = rpc_lookup_cred();
738 return PTR_ERR(cred);
739 ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
743 nfs_file_set_open_context(filp, ctx);
744 put_nfs_open_context(ctx);
745 nfs_fscache_set_inode_cookie(inode, filp);
749 int nfs_release(struct inode *inode, struct file *filp)
751 nfs_file_clear_open_context(filp);
756 * This function is called whenever some part of NFS notices that
757 * the cached attributes have to be refreshed.
760 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
762 int status = -ESTALE;
763 struct nfs_fattr *fattr = NULL;
764 struct nfs_inode *nfsi = NFS_I(inode);
766 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
767 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
769 if (is_bad_inode(inode))
771 if (NFS_STALE(inode))
775 fattr = nfs_alloc_fattr();
779 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
780 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
782 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
784 (long long)NFS_FILEID(inode), status);
785 if (status == -ESTALE) {
786 nfs_zap_caches(inode);
787 if (!S_ISDIR(inode->i_mode))
788 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
793 status = nfs_refresh_inode(inode, fattr);
795 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
797 (long long)NFS_FILEID(inode), status);
801 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
802 nfs_zap_acl_cache(inode);
804 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
806 (long long)NFS_FILEID(inode));
809 nfs_free_fattr(fattr);
813 int nfs_attribute_timeout(struct inode *inode)
815 struct nfs_inode *nfsi = NFS_I(inode);
817 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
820 static int nfs_attribute_cache_expired(struct inode *inode)
822 if (nfs_have_delegated_attributes(inode))
824 return nfs_attribute_timeout(inode);
828 * nfs_revalidate_inode - Revalidate the inode attributes
829 * @server - pointer to nfs_server struct
830 * @inode - pointer to inode struct
832 * Updates inode attribute information by retrieving the data from the server.
834 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
836 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
837 && !nfs_attribute_cache_expired(inode))
838 return NFS_STALE(inode) ? -ESTALE : 0;
839 return __nfs_revalidate_inode(server, inode);
842 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
844 struct nfs_inode *nfsi = NFS_I(inode);
846 if (mapping->nrpages != 0) {
847 int ret = invalidate_inode_pages2(mapping);
851 spin_lock(&inode->i_lock);
852 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
853 if (S_ISDIR(inode->i_mode))
854 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
855 spin_unlock(&inode->i_lock);
856 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
857 nfs_fscache_reset_inode_cookie(inode);
858 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
859 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
864 * nfs_revalidate_mapping - Revalidate the pagecache
865 * @inode - pointer to host inode
866 * @mapping - pointer to mapping
868 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
870 struct nfs_inode *nfsi = NFS_I(inode);
873 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
874 || nfs_attribute_cache_expired(inode)
875 || NFS_STALE(inode)) {
876 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
880 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
881 ret = nfs_invalidate_mapping(inode, mapping);
886 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
888 struct nfs_inode *nfsi = NFS_I(inode);
890 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
891 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
892 && nfsi->change_attr == fattr->pre_change_attr) {
893 nfsi->change_attr = fattr->change_attr;
894 if (S_ISDIR(inode->i_mode))
895 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
897 /* If we have atomic WCC data, we may update some attributes */
898 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
899 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
900 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
901 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
903 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
904 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
905 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
906 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
907 if (S_ISDIR(inode->i_mode))
908 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
910 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
911 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
912 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
913 && nfsi->npages == 0)
914 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
918 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
919 * @inode - pointer to inode
920 * @fattr - updated attributes
922 * Verifies the attribute cache. If we have just changed the attributes,
923 * so that fattr carries weak cache consistency data, then it may
924 * also update the ctime/mtime/change_attribute.
926 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
928 struct nfs_inode *nfsi = NFS_I(inode);
929 loff_t cur_size, new_isize;
930 unsigned long invalid = 0;
933 /* Has the inode gone and changed behind our back? */
934 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
936 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
939 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
940 nfsi->change_attr != fattr->change_attr)
941 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
943 /* Verify a few of the more important attributes */
944 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
945 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
947 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
948 cur_size = i_size_read(inode);
949 new_isize = nfs_size_to_loff_t(fattr->size);
950 if (cur_size != new_isize && nfsi->npages == 0)
951 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
954 /* Have any file permissions changed? */
955 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
956 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
957 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
958 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
959 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
960 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
962 /* Has the link count changed? */
963 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
964 invalid |= NFS_INO_INVALID_ATTR;
966 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
967 invalid |= NFS_INO_INVALID_ATIME;
970 nfsi->cache_validity |= invalid;
972 nfsi->read_cache_jiffies = fattr->time_start;
976 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
978 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
980 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
983 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
985 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
987 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
990 static atomic_long_t nfs_attr_generation_counter;
992 static unsigned long nfs_read_attr_generation_counter(void)
994 return atomic_long_read(&nfs_attr_generation_counter);
997 unsigned long nfs_inc_attr_generation_counter(void)
999 return atomic_long_inc_return(&nfs_attr_generation_counter);
1002 void nfs_fattr_init(struct nfs_fattr *fattr)
1005 fattr->time_start = jiffies;
1006 fattr->gencount = nfs_inc_attr_generation_counter();
1009 struct nfs_fattr *nfs_alloc_fattr(void)
1011 struct nfs_fattr *fattr;
1013 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1015 nfs_fattr_init(fattr);
1019 struct nfs_fh *nfs_alloc_fhandle(void)
1023 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1030 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1031 * @inode - pointer to inode
1032 * @fattr - attributes
1034 * Attempt to divine whether or not an RPC call reply carrying stale
1035 * attributes got scheduled after another call carrying updated ones.
1037 * To do so, the function first assumes that a more recent ctime means
1038 * that the attributes in fattr are newer, however it also attempt to
1039 * catch the case where ctime either didn't change, or went backwards
1040 * (if someone reset the clock on the server) by looking at whether
1041 * or not this RPC call was started after the inode was last updated.
1042 * Note also the check for wraparound of 'attr_gencount'
1044 * The function returns 'true' if it thinks the attributes in 'fattr' are
1045 * more recent than the ones cached in the inode.
1048 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1050 const struct nfs_inode *nfsi = NFS_I(inode);
1052 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1053 nfs_ctime_need_update(inode, fattr) ||
1054 nfs_size_need_update(inode, fattr) ||
1055 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1058 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1060 if (nfs_inode_attrs_need_update(inode, fattr))
1061 return nfs_update_inode(inode, fattr);
1062 return nfs_check_inode_attributes(inode, fattr);
1066 * nfs_refresh_inode - try to update the inode attribute cache
1067 * @inode - pointer to inode
1068 * @fattr - updated attributes
1070 * Check that an RPC call that returned attributes has not overlapped with
1071 * other recent updates of the inode metadata, then decide whether it is
1072 * safe to do a full update of the inode attributes, or whether just to
1073 * call nfs_check_inode_attributes.
1075 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1079 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1081 spin_lock(&inode->i_lock);
1082 status = nfs_refresh_inode_locked(inode, fattr);
1083 spin_unlock(&inode->i_lock);
1088 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1090 struct nfs_inode *nfsi = NFS_I(inode);
1092 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1093 if (S_ISDIR(inode->i_mode))
1094 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1095 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1097 return nfs_refresh_inode_locked(inode, fattr);
1101 * nfs_post_op_update_inode - try to update the inode attribute cache
1102 * @inode - pointer to inode
1103 * @fattr - updated attributes
1105 * After an operation that has changed the inode metadata, mark the
1106 * attribute cache as being invalid, then try to update it.
1108 * NB: if the server didn't return any post op attributes, this
1109 * function will force the retrieval of attributes before the next
1110 * NFS request. Thus it should be used only for operations that
1111 * are expected to change one or more attributes, to avoid
1112 * unnecessary NFS requests and trips through nfs_update_inode().
1114 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1118 spin_lock(&inode->i_lock);
1119 status = nfs_post_op_update_inode_locked(inode, fattr);
1120 spin_unlock(&inode->i_lock);
1125 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1126 * @inode - pointer to inode
1127 * @fattr - updated attributes
1129 * After an operation that has changed the inode metadata, mark the
1130 * attribute cache as being invalid, then try to update it. Fake up
1131 * weak cache consistency data, if none exist.
1133 * This function is mainly designed to be used by the ->write_done() functions.
1135 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1139 spin_lock(&inode->i_lock);
1140 /* Don't do a WCC update if these attributes are already stale */
1141 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1142 !nfs_inode_attrs_need_update(inode, fattr)) {
1143 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1144 | NFS_ATTR_FATTR_PRESIZE
1145 | NFS_ATTR_FATTR_PREMTIME
1146 | NFS_ATTR_FATTR_PRECTIME);
1149 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1150 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1151 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1152 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1154 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1155 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1156 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1157 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1159 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1160 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1161 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1162 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1164 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1165 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1166 fattr->pre_size = i_size_read(inode);
1167 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1170 status = nfs_post_op_update_inode_locked(inode, fattr);
1171 spin_unlock(&inode->i_lock);
1176 * Many nfs protocol calls return the new file attributes after
1177 * an operation. Here we update the inode to reflect the state
1178 * of the server's inode.
1180 * This is a bit tricky because we have to make sure all dirty pages
1181 * have been sent off to the server before calling invalidate_inode_pages.
1182 * To make sure no other process adds more write requests while we try
1183 * our best to flush them, we make them sleep during the attribute refresh.
1185 * A very similar scenario holds for the dir cache.
1187 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1189 struct nfs_server *server;
1190 struct nfs_inode *nfsi = NFS_I(inode);
1191 loff_t cur_isize, new_isize;
1192 unsigned long invalid = 0;
1193 unsigned long now = jiffies;
1194 unsigned long save_cache_validity;
1196 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1197 __func__, inode->i_sb->s_id, inode->i_ino,
1198 atomic_read(&inode->i_count), fattr->valid);
1200 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1204 * Make sure the inode's type hasn't changed.
1206 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1209 server = NFS_SERVER(inode);
1210 /* Update the fsid? */
1211 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1212 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1213 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1214 server->fsid = fattr->fsid;
1217 * Update the read time so we don't revalidate too often.
1219 nfsi->read_cache_jiffies = fattr->time_start;
1221 save_cache_validity = nfsi->cache_validity;
1222 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1223 | NFS_INO_INVALID_ATIME
1224 | NFS_INO_REVAL_FORCED
1225 | NFS_INO_REVAL_PAGECACHE);
1227 /* Do atomic weak cache consistency updates */
1228 nfs_wcc_update_inode(inode, fattr);
1230 /* More cache consistency checks */
1231 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1232 if (nfsi->change_attr != fattr->change_attr) {
1233 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1234 inode->i_sb->s_id, inode->i_ino);
1235 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1236 if (S_ISDIR(inode->i_mode))
1237 nfs_force_lookup_revalidate(inode);
1238 nfsi->change_attr = fattr->change_attr;
1240 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1241 invalid |= save_cache_validity;
1243 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1244 /* NFSv2/v3: Check if the mtime agrees */
1245 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1246 dprintk("NFS: mtime change on server for file %s/%ld\n",
1247 inode->i_sb->s_id, inode->i_ino);
1248 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1249 if (S_ISDIR(inode->i_mode))
1250 nfs_force_lookup_revalidate(inode);
1251 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1253 } else if (server->caps & NFS_CAP_MTIME)
1254 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1255 | NFS_INO_INVALID_DATA
1256 | NFS_INO_REVAL_PAGECACHE
1257 | NFS_INO_REVAL_FORCED);
1259 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1260 /* If ctime has changed we should definitely clear access+acl caches */
1261 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1262 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1263 /* and probably clear data for a directory too as utimes can cause
1264 * havoc with our cache.
1266 if (S_ISDIR(inode->i_mode)) {
1267 invalid |= NFS_INO_INVALID_DATA;
1268 nfs_force_lookup_revalidate(inode);
1270 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1272 } else if (server->caps & NFS_CAP_CTIME)
1273 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1274 | NFS_INO_INVALID_ACCESS
1275 | NFS_INO_INVALID_ACL
1276 | NFS_INO_REVAL_FORCED);
1278 /* Check if our cached file size is stale */
1279 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1280 new_isize = nfs_size_to_loff_t(fattr->size);
1281 cur_isize = i_size_read(inode);
1282 if (new_isize != cur_isize) {
1283 /* Do we perhaps have any outstanding writes, or has
1284 * the file grown beyond our last write? */
1285 if (nfsi->npages == 0 || new_isize > cur_isize) {
1286 i_size_write(inode, new_isize);
1287 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1289 dprintk("NFS: isize change on server for file %s/%ld\n",
1290 inode->i_sb->s_id, inode->i_ino);
1293 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1294 | NFS_INO_REVAL_PAGECACHE
1295 | NFS_INO_REVAL_FORCED);
1298 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1299 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1300 else if (server->caps & NFS_CAP_ATIME)
1301 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1302 | NFS_INO_REVAL_FORCED);
1304 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1305 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1306 umode_t newmode = inode->i_mode & S_IFMT;
1307 newmode |= fattr->mode & S_IALLUGO;
1308 inode->i_mode = newmode;
1309 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1311 } else if (server->caps & NFS_CAP_MODE)
1312 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1313 | NFS_INO_INVALID_ACCESS
1314 | NFS_INO_INVALID_ACL
1315 | NFS_INO_REVAL_FORCED);
1317 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1318 if (inode->i_uid != fattr->uid) {
1319 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1320 inode->i_uid = fattr->uid;
1322 } else if (server->caps & NFS_CAP_OWNER)
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_GROUP) {
1329 if (inode->i_gid != fattr->gid) {
1330 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1331 inode->i_gid = fattr->gid;
1333 } else if (server->caps & NFS_CAP_OWNER_GROUP)
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_NLINK) {
1340 if (inode->i_nlink != fattr->nlink) {
1341 invalid |= NFS_INO_INVALID_ATTR;
1342 if (S_ISDIR(inode->i_mode))
1343 invalid |= NFS_INO_INVALID_DATA;
1344 inode->i_nlink = fattr->nlink;
1346 } else if (server->caps & NFS_CAP_NLINK)
1347 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1348 | NFS_INO_REVAL_FORCED);
1350 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1352 * report the blocks in 512byte units
1354 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1356 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1357 inode->i_blocks = fattr->du.nfs2.blocks;
1359 /* Update attrtimeo value if we're out of the unstable period */
1360 if (invalid & NFS_INO_INVALID_ATTR) {
1361 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1362 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1363 nfsi->attrtimeo_timestamp = now;
1364 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1366 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1367 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1368 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1369 nfsi->attrtimeo_timestamp = now;
1372 invalid &= ~NFS_INO_INVALID_ATTR;
1373 /* Don't invalidate the data if we were to blame */
1374 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1375 || S_ISLNK(inode->i_mode)))
1376 invalid &= ~NFS_INO_INVALID_DATA;
1377 if (!nfs_have_delegation(inode, FMODE_READ) ||
1378 (save_cache_validity & NFS_INO_REVAL_FORCED))
1379 nfsi->cache_validity |= invalid;
1384 * Big trouble! The inode has become a different object.
1386 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1387 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1390 * No need to worry about unhashing the dentry, as the
1391 * lookup validation will know that the inode is bad.
1392 * (But we fall through to invalidate the caches.)
1394 nfs_invalidate_inode(inode);
1398 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1399 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1400 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1401 (long long)nfsi->fileid, (long long)fattr->fileid);
1406 #ifdef CONFIG_NFS_V4
1409 * Clean out any remaining NFSv4 state that might be left over due
1410 * to open() calls that passed nfs_atomic_lookup, but failed to call
1413 void nfs4_evict_inode(struct inode *inode)
1415 truncate_inode_pages(&inode->i_data, 0);
1416 end_writeback(inode);
1417 /* If we are holding a delegation, return it! */
1418 nfs_inode_return_delegation_noreclaim(inode);
1419 /* First call standard NFS clear_inode() code */
1420 nfs_clear_inode(inode);
1424 struct inode *nfs_alloc_inode(struct super_block *sb)
1426 struct nfs_inode *nfsi;
1427 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1431 nfsi->cache_validity = 0UL;
1432 #ifdef CONFIG_NFS_V3_ACL
1433 nfsi->acl_access = ERR_PTR(-EAGAIN);
1434 nfsi->acl_default = ERR_PTR(-EAGAIN);
1436 #ifdef CONFIG_NFS_V4
1437 nfsi->nfs4_acl = NULL;
1438 #endif /* CONFIG_NFS_V4 */
1439 return &nfsi->vfs_inode;
1442 void nfs_destroy_inode(struct inode *inode)
1444 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1447 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1449 #ifdef CONFIG_NFS_V4
1450 INIT_LIST_HEAD(&nfsi->open_states);
1451 nfsi->delegation = NULL;
1452 nfsi->delegation_state = 0;
1453 init_rwsem(&nfsi->rwsem);
1457 static void init_once(void *foo)
1459 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1461 inode_init_once(&nfsi->vfs_inode);
1462 INIT_LIST_HEAD(&nfsi->open_files);
1463 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1464 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1465 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1468 atomic_set(&nfsi->silly_count, 1);
1469 INIT_HLIST_HEAD(&nfsi->silly_list);
1470 init_waitqueue_head(&nfsi->waitqueue);
1471 nfs4_init_once(nfsi);
1474 static int __init nfs_init_inodecache(void)
1476 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1477 sizeof(struct nfs_inode),
1478 0, (SLAB_RECLAIM_ACCOUNT|
1481 if (nfs_inode_cachep == NULL)
1487 static void nfs_destroy_inodecache(void)
1489 kmem_cache_destroy(nfs_inode_cachep);
1492 struct workqueue_struct *nfsiod_workqueue;
1495 * start up the nfsiod workqueue
1497 static int nfsiod_start(void)
1499 struct workqueue_struct *wq;
1500 dprintk("RPC: creating workqueue nfsiod\n");
1501 wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
1504 nfsiod_workqueue = wq;
1509 * Destroy the nfsiod workqueue
1511 static void nfsiod_stop(void)
1513 struct workqueue_struct *wq;
1515 wq = nfsiod_workqueue;
1518 nfsiod_workqueue = NULL;
1519 destroy_workqueue(wq);
1525 static int __init init_nfs_fs(void)
1529 err = nfs_dns_resolver_init();
1533 err = nfs_fscache_register();
1537 err = nfsiod_start();
1541 err = nfs_fs_proc_init();
1545 err = nfs_init_nfspagecache();
1549 err = nfs_init_inodecache();
1553 err = nfs_init_readpagecache();
1557 err = nfs_init_writepagecache();
1561 err = nfs_init_directcache();
1565 #ifdef CONFIG_PROC_FS
1566 rpc_proc_register(&nfs_rpcstat);
1568 if ((err = register_nfs_fs()) != 0)
1572 #ifdef CONFIG_PROC_FS
1573 rpc_proc_unregister("nfs");
1575 nfs_destroy_directcache();
1577 nfs_destroy_writepagecache();
1579 nfs_destroy_readpagecache();
1581 nfs_destroy_inodecache();
1583 nfs_destroy_nfspagecache();
1589 nfs_fscache_unregister();
1591 nfs_dns_resolver_destroy();
1596 static void __exit exit_nfs_fs(void)
1598 nfs_destroy_directcache();
1599 nfs_destroy_writepagecache();
1600 nfs_destroy_readpagecache();
1601 nfs_destroy_inodecache();
1602 nfs_destroy_nfspagecache();
1603 nfs_fscache_unregister();
1604 nfs_dns_resolver_destroy();
1605 #ifdef CONFIG_PROC_FS
1606 rpc_proc_unregister("nfs");
1608 unregister_nfs_fs();
1613 /* Not quite true; I just maintain it */
1614 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1615 MODULE_LICENSE("GPL");
1616 module_param(enable_ino64, bool, 0644);
1618 module_init(init_nfs_fs)
1619 module_exit(exit_nfs_fs)