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_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
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 nfs_attr_check_mountpoint(sb, fattr);
259 if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) &&
260 !nfs_attr_use_mounted_on_fileid(fattr))
262 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
265 hash = nfs_fattr_to_ino_t(fattr);
267 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
269 inode = ERR_PTR(-ENOMEM);
273 if (inode->i_state & I_NEW) {
274 struct nfs_inode *nfsi = NFS_I(inode);
275 unsigned long now = jiffies;
277 /* We set i_ino for the few things that still rely on it,
281 /* We can't support update_atime(), since the server will reset it */
282 inode->i_flags |= S_NOATIME|S_NOCMTIME;
283 inode->i_mode = fattr->mode;
284 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
285 && nfs_server_capable(inode, NFS_CAP_MODE))
286 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
287 | NFS_INO_INVALID_ACCESS
288 | NFS_INO_INVALID_ACL;
289 /* Why so? Because we want revalidate for devices/FIFOs, and
290 * that's precisely what we have in nfs_file_inode_operations.
292 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
293 if (S_ISREG(inode->i_mode)) {
294 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
295 inode->i_data.a_ops = &nfs_file_aops;
296 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
297 } else if (S_ISDIR(inode->i_mode)) {
298 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
299 inode->i_fop = &nfs_dir_operations;
300 inode->i_data.a_ops = &nfs_dir_aops;
301 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
302 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
303 /* Deal with crossing mountpoints */
304 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
305 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
306 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
307 inode->i_op = &nfs_referral_inode_operations;
309 inode->i_op = &nfs_mountpoint_inode_operations;
311 inode->i_flags |= S_AUTOMOUNT;
313 } else if (S_ISLNK(inode->i_mode))
314 inode->i_op = &nfs_symlink_inode_operations;
316 init_special_inode(inode, inode->i_mode, fattr->rdev);
318 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
319 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
320 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
321 inode->i_version = 0;
327 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
329 nfsi->read_cache_jiffies = fattr->time_start;
330 nfsi->attr_gencount = fattr->gencount;
331 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
332 inode->i_atime = fattr->atime;
333 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
334 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
335 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
336 inode->i_mtime = fattr->mtime;
337 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
338 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
339 | NFS_INO_INVALID_DATA;
340 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
341 inode->i_ctime = fattr->ctime;
342 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
343 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
344 | NFS_INO_INVALID_ACCESS
345 | NFS_INO_INVALID_ACL;
346 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
347 inode->i_version = fattr->change_attr;
348 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
349 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
350 | NFS_INO_INVALID_DATA;
351 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
352 inode->i_size = nfs_size_to_loff_t(fattr->size);
354 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
355 | NFS_INO_INVALID_DATA
356 | NFS_INO_REVAL_PAGECACHE;
357 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
358 set_nlink(inode, fattr->nlink);
359 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
360 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
361 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
362 inode->i_uid = fattr->uid;
363 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
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_GROUP)
368 inode->i_gid = fattr->gid;
369 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
370 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
371 | NFS_INO_INVALID_ACCESS
372 | NFS_INO_INVALID_ACL;
373 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
374 inode->i_blocks = fattr->du.nfs2.blocks;
375 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
377 * report the blocks in 512byte units
379 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
381 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
382 nfsi->attrtimeo_timestamp = now;
383 nfsi->access_cache = RB_ROOT;
385 nfs_fscache_init_inode_cookie(inode);
387 unlock_new_inode(inode);
389 nfs_refresh_inode(inode, fattr);
390 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
392 (long long)NFS_FILEID(inode),
393 atomic_read(&inode->i_count));
399 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
403 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
406 nfs_setattr(struct dentry *dentry, struct iattr *attr)
408 struct inode *inode = dentry->d_inode;
409 struct nfs_fattr *fattr;
412 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
414 /* skip mode change if it's just for clearing setuid/setgid */
415 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
416 attr->ia_valid &= ~ATTR_MODE;
418 if (attr->ia_valid & ATTR_SIZE) {
419 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
420 attr->ia_valid &= ~ATTR_SIZE;
423 /* Optimization: if the end result is no change, don't RPC */
424 attr->ia_valid &= NFS_VALID_ATTRS;
425 if ((attr->ia_valid & ~ATTR_FILE) == 0)
428 /* Write all dirty data */
429 if (S_ISREG(inode->i_mode))
432 fattr = nfs_alloc_fattr();
436 * Return any delegations if we're going to change ACLs
438 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
439 nfs_inode_return_delegation(inode);
440 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
442 nfs_refresh_inode(inode, fattr);
443 nfs_free_fattr(fattr);
449 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
450 * @inode: inode of the file used
451 * @offset: file offset to start truncating
453 * This is a copy of the common vmtruncate, but with the locking
454 * corrected to take into account the fact that NFS requires
455 * inode->i_size to be updated under the inode->i_lock.
457 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
462 err = inode_newsize_ok(inode, offset);
466 spin_lock(&inode->i_lock);
467 oldsize = inode->i_size;
468 i_size_write(inode, offset);
469 spin_unlock(&inode->i_lock);
471 truncate_pagecache(inode, oldsize, offset);
477 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
478 * @inode: pointer to struct inode
479 * @attr: pointer to struct iattr
481 * Note: we do this in the *proc.c in order to ensure that
482 * it works for things like exclusive creates too.
484 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
486 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
487 spin_lock(&inode->i_lock);
488 if ((attr->ia_valid & ATTR_MODE) != 0) {
489 int mode = attr->ia_mode & S_IALLUGO;
490 mode |= inode->i_mode & ~S_IALLUGO;
491 inode->i_mode = mode;
493 if ((attr->ia_valid & ATTR_UID) != 0)
494 inode->i_uid = attr->ia_uid;
495 if ((attr->ia_valid & ATTR_GID) != 0)
496 inode->i_gid = attr->ia_gid;
497 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
498 spin_unlock(&inode->i_lock);
500 if ((attr->ia_valid & ATTR_SIZE) != 0) {
501 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
502 nfs_vmtruncate(inode, attr->ia_size);
506 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
508 struct inode *inode = dentry->d_inode;
509 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
512 /* Flush out writes to the server in order to update c/mtime. */
513 if (S_ISREG(inode->i_mode)) {
514 err = filemap_write_and_wait(inode->i_mapping);
520 * We may force a getattr if the user cares about atime.
522 * Note that we only have to check the vfsmount flags here:
523 * - NFS always sets S_NOATIME by so checking it would give a
525 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
526 * no point in checking those.
528 if ((mnt->mnt_flags & MNT_NOATIME) ||
529 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
533 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
535 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
537 generic_fillattr(inode, stat);
538 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
544 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
546 atomic_set(&l_ctx->count, 1);
547 l_ctx->lockowner = current->files;
548 l_ctx->pid = current->tgid;
549 INIT_LIST_HEAD(&l_ctx->list);
552 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
554 struct nfs_lock_context *pos;
556 list_for_each_entry(pos, &ctx->lock_context.list, list) {
557 if (pos->lockowner != current->files)
559 if (pos->pid != current->tgid)
561 atomic_inc(&pos->count);
567 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
569 struct nfs_lock_context *res, *new = NULL;
570 struct inode *inode = ctx->dentry->d_inode;
572 spin_lock(&inode->i_lock);
573 res = __nfs_find_lock_context(ctx);
575 spin_unlock(&inode->i_lock);
576 new = kmalloc(sizeof(*new), GFP_KERNEL);
579 nfs_init_lock_context(new);
580 spin_lock(&inode->i_lock);
581 res = __nfs_find_lock_context(ctx);
583 list_add_tail(&new->list, &ctx->lock_context.list);
584 new->open_context = ctx;
589 spin_unlock(&inode->i_lock);
594 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
596 struct nfs_open_context *ctx = l_ctx->open_context;
597 struct inode *inode = ctx->dentry->d_inode;
599 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
601 list_del(&l_ctx->list);
602 spin_unlock(&inode->i_lock);
607 * nfs_close_context - Common close_context() routine NFSv2/v3
608 * @ctx: pointer to context
609 * @is_sync: is this a synchronous close
611 * always ensure that the attributes are up to date if we're mounted
612 * with close-to-open semantics
614 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
617 struct nfs_server *server;
619 if (!(ctx->mode & FMODE_WRITE))
623 inode = ctx->dentry->d_inode;
624 if (!list_empty(&NFS_I(inode)->open_files))
626 server = NFS_SERVER(inode);
627 if (server->flags & NFS_MOUNT_NOCTO)
629 nfs_revalidate_inode(server, inode);
632 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred, fmode_t f_mode)
634 struct nfs_open_context *ctx;
636 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
638 nfs_sb_active(dentry->d_sb);
639 ctx->dentry = dget(dentry);
640 ctx->cred = get_rpccred(cred);
645 nfs_init_lock_context(&ctx->lock_context);
646 ctx->lock_context.open_context = ctx;
647 INIT_LIST_HEAD(&ctx->list);
652 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
655 atomic_inc(&ctx->lock_context.count);
659 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
661 struct inode *inode = ctx->dentry->d_inode;
662 struct super_block *sb = ctx->dentry->d_sb;
664 if (!list_empty(&ctx->list)) {
665 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
667 list_del(&ctx->list);
668 spin_unlock(&inode->i_lock);
669 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
672 NFS_PROTO(inode)->close_context(ctx, is_sync);
673 if (ctx->cred != NULL)
674 put_rpccred(ctx->cred);
680 void put_nfs_open_context(struct nfs_open_context *ctx)
682 __put_nfs_open_context(ctx, 0);
686 * Ensure that mmap has a recent RPC credential for use when writing out
689 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
691 struct inode *inode = filp->f_path.dentry->d_inode;
692 struct nfs_inode *nfsi = NFS_I(inode);
694 filp->private_data = get_nfs_open_context(ctx);
695 spin_lock(&inode->i_lock);
696 list_add(&ctx->list, &nfsi->open_files);
697 spin_unlock(&inode->i_lock);
701 * Given an inode, search for an open context with the desired characteristics
703 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
705 struct nfs_inode *nfsi = NFS_I(inode);
706 struct nfs_open_context *pos, *ctx = NULL;
708 spin_lock(&inode->i_lock);
709 list_for_each_entry(pos, &nfsi->open_files, list) {
710 if (cred != NULL && pos->cred != cred)
712 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
714 ctx = get_nfs_open_context(pos);
717 spin_unlock(&inode->i_lock);
721 static void nfs_file_clear_open_context(struct file *filp)
723 struct inode *inode = filp->f_path.dentry->d_inode;
724 struct nfs_open_context *ctx = nfs_file_open_context(filp);
727 filp->private_data = NULL;
728 spin_lock(&inode->i_lock);
729 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
730 spin_unlock(&inode->i_lock);
731 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
736 * These allocate and release file read/write context information.
738 int nfs_open(struct inode *inode, struct file *filp)
740 struct nfs_open_context *ctx;
741 struct rpc_cred *cred;
743 cred = rpc_lookup_cred();
745 return PTR_ERR(cred);
746 ctx = alloc_nfs_open_context(filp->f_path.dentry, cred, filp->f_mode);
750 nfs_file_set_open_context(filp, ctx);
751 put_nfs_open_context(ctx);
752 nfs_fscache_set_inode_cookie(inode, filp);
756 int nfs_release(struct inode *inode, struct file *filp)
758 nfs_file_clear_open_context(filp);
763 * This function is called whenever some part of NFS notices that
764 * the cached attributes have to be refreshed.
767 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
769 int status = -ESTALE;
770 struct nfs_fattr *fattr = NULL;
771 struct nfs_inode *nfsi = NFS_I(inode);
773 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
774 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
776 if (is_bad_inode(inode))
778 if (NFS_STALE(inode))
782 fattr = nfs_alloc_fattr();
786 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
787 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
789 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
791 (long long)NFS_FILEID(inode), status);
792 if (status == -ESTALE) {
793 nfs_zap_caches(inode);
794 if (!S_ISDIR(inode->i_mode))
795 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
800 status = nfs_refresh_inode(inode, fattr);
802 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
804 (long long)NFS_FILEID(inode), status);
808 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
809 nfs_zap_acl_cache(inode);
811 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
813 (long long)NFS_FILEID(inode));
816 nfs_free_fattr(fattr);
820 int nfs_attribute_timeout(struct inode *inode)
822 struct nfs_inode *nfsi = NFS_I(inode);
824 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
827 static int nfs_attribute_cache_expired(struct inode *inode)
829 if (nfs_have_delegated_attributes(inode))
831 return nfs_attribute_timeout(inode);
835 * nfs_revalidate_inode - Revalidate the inode attributes
836 * @server - pointer to nfs_server struct
837 * @inode - pointer to inode struct
839 * Updates inode attribute information by retrieving the data from the server.
841 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
843 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
844 && !nfs_attribute_cache_expired(inode))
845 return NFS_STALE(inode) ? -ESTALE : 0;
846 return __nfs_revalidate_inode(server, inode);
849 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
851 struct nfs_inode *nfsi = NFS_I(inode);
853 if (mapping->nrpages != 0) {
854 int ret = invalidate_inode_pages2(mapping);
858 spin_lock(&inode->i_lock);
859 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
860 if (S_ISDIR(inode->i_mode))
861 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
862 spin_unlock(&inode->i_lock);
863 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
864 nfs_fscache_reset_inode_cookie(inode);
865 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
866 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
871 * nfs_revalidate_mapping - Revalidate the pagecache
872 * @inode - pointer to host inode
873 * @mapping - pointer to mapping
875 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
877 struct nfs_inode *nfsi = NFS_I(inode);
880 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
881 || nfs_attribute_cache_expired(inode)
882 || NFS_STALE(inode)) {
883 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
887 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
888 ret = nfs_invalidate_mapping(inode, mapping);
893 static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
895 struct nfs_inode *nfsi = NFS_I(inode);
896 unsigned long ret = 0;
898 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
899 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
900 && inode->i_version == fattr->pre_change_attr) {
901 inode->i_version = fattr->change_attr;
902 if (S_ISDIR(inode->i_mode))
903 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
904 ret |= NFS_INO_INVALID_ATTR;
906 /* If we have atomic WCC data, we may update some attributes */
907 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
908 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
909 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
910 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
911 ret |= NFS_INO_INVALID_ATTR;
914 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
915 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
916 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
917 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
918 if (S_ISDIR(inode->i_mode))
919 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
920 ret |= NFS_INO_INVALID_ATTR;
922 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
923 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
924 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
925 && nfsi->npages == 0) {
926 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
927 ret |= NFS_INO_INVALID_ATTR;
933 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
934 * @inode - pointer to inode
935 * @fattr - updated attributes
937 * Verifies the attribute cache. If we have just changed the attributes,
938 * so that fattr carries weak cache consistency data, then it may
939 * also update the ctime/mtime/change_attribute.
941 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
943 struct nfs_inode *nfsi = NFS_I(inode);
944 loff_t cur_size, new_isize;
945 unsigned long invalid = 0;
948 /* Has the inode gone and changed behind our back? */
949 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
951 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
954 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
955 inode->i_version != fattr->change_attr)
956 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
958 /* Verify a few of the more important attributes */
959 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
960 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
962 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
963 cur_size = i_size_read(inode);
964 new_isize = nfs_size_to_loff_t(fattr->size);
965 if (cur_size != new_isize && nfsi->npages == 0)
966 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
969 /* Have any file permissions changed? */
970 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
971 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
972 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
973 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
974 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
975 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
977 /* Has the link count changed? */
978 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
979 invalid |= NFS_INO_INVALID_ATTR;
981 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
982 invalid |= NFS_INO_INVALID_ATIME;
985 nfsi->cache_validity |= invalid;
987 nfsi->read_cache_jiffies = fattr->time_start;
991 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
993 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
995 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
998 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1000 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
1002 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
1005 static atomic_long_t nfs_attr_generation_counter;
1007 static unsigned long nfs_read_attr_generation_counter(void)
1009 return atomic_long_read(&nfs_attr_generation_counter);
1012 unsigned long nfs_inc_attr_generation_counter(void)
1014 return atomic_long_inc_return(&nfs_attr_generation_counter);
1017 void nfs_fattr_init(struct nfs_fattr *fattr)
1020 fattr->time_start = jiffies;
1021 fattr->gencount = nfs_inc_attr_generation_counter();
1024 struct nfs_fattr *nfs_alloc_fattr(void)
1026 struct nfs_fattr *fattr;
1028 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1030 nfs_fattr_init(fattr);
1034 struct nfs_fh *nfs_alloc_fhandle(void)
1038 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1045 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1046 * @inode - pointer to inode
1047 * @fattr - attributes
1049 * Attempt to divine whether or not an RPC call reply carrying stale
1050 * attributes got scheduled after another call carrying updated ones.
1052 * To do so, the function first assumes that a more recent ctime means
1053 * that the attributes in fattr are newer, however it also attempt to
1054 * catch the case where ctime either didn't change, or went backwards
1055 * (if someone reset the clock on the server) by looking at whether
1056 * or not this RPC call was started after the inode was last updated.
1057 * Note also the check for wraparound of 'attr_gencount'
1059 * The function returns 'true' if it thinks the attributes in 'fattr' are
1060 * more recent than the ones cached in the inode.
1063 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1065 const struct nfs_inode *nfsi = NFS_I(inode);
1067 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1068 nfs_ctime_need_update(inode, fattr) ||
1069 nfs_size_need_update(inode, fattr) ||
1070 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1073 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1075 if (nfs_inode_attrs_need_update(inode, fattr))
1076 return nfs_update_inode(inode, fattr);
1077 return nfs_check_inode_attributes(inode, fattr);
1081 * nfs_refresh_inode - try to update the inode attribute cache
1082 * @inode - pointer to inode
1083 * @fattr - updated attributes
1085 * Check that an RPC call that returned attributes has not overlapped with
1086 * other recent updates of the inode metadata, then decide whether it is
1087 * safe to do a full update of the inode attributes, or whether just to
1088 * call nfs_check_inode_attributes.
1090 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1094 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1096 spin_lock(&inode->i_lock);
1097 status = nfs_refresh_inode_locked(inode, fattr);
1098 spin_unlock(&inode->i_lock);
1103 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1105 struct nfs_inode *nfsi = NFS_I(inode);
1107 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1108 if (S_ISDIR(inode->i_mode))
1109 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1110 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1112 return nfs_refresh_inode_locked(inode, fattr);
1116 * nfs_post_op_update_inode - try to update the inode attribute cache
1117 * @inode - pointer to inode
1118 * @fattr - updated attributes
1120 * After an operation that has changed the inode metadata, mark the
1121 * attribute cache as being invalid, then try to update it.
1123 * NB: if the server didn't return any post op attributes, this
1124 * function will force the retrieval of attributes before the next
1125 * NFS request. Thus it should be used only for operations that
1126 * are expected to change one or more attributes, to avoid
1127 * unnecessary NFS requests and trips through nfs_update_inode().
1129 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1133 spin_lock(&inode->i_lock);
1134 status = nfs_post_op_update_inode_locked(inode, fattr);
1135 spin_unlock(&inode->i_lock);
1140 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1141 * @inode - pointer to inode
1142 * @fattr - updated attributes
1144 * After an operation that has changed the inode metadata, mark the
1145 * attribute cache as being invalid, then try to update it. Fake up
1146 * weak cache consistency data, if none exist.
1148 * This function is mainly designed to be used by the ->write_done() functions.
1150 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1154 spin_lock(&inode->i_lock);
1155 /* Don't do a WCC update if these attributes are already stale */
1156 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1157 !nfs_inode_attrs_need_update(inode, fattr)) {
1158 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1159 | NFS_ATTR_FATTR_PRESIZE
1160 | NFS_ATTR_FATTR_PREMTIME
1161 | NFS_ATTR_FATTR_PRECTIME);
1164 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1165 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1166 fattr->pre_change_attr = inode->i_version;
1167 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1169 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1170 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1171 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1172 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1174 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1175 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1176 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1177 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1179 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1180 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1181 fattr->pre_size = i_size_read(inode);
1182 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1185 status = nfs_post_op_update_inode_locked(inode, fattr);
1186 spin_unlock(&inode->i_lock);
1191 * Many nfs protocol calls return the new file attributes after
1192 * an operation. Here we update the inode to reflect the state
1193 * of the server's inode.
1195 * This is a bit tricky because we have to make sure all dirty pages
1196 * have been sent off to the server before calling invalidate_inode_pages.
1197 * To make sure no other process adds more write requests while we try
1198 * our best to flush them, we make them sleep during the attribute refresh.
1200 * A very similar scenario holds for the dir cache.
1202 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1204 struct nfs_server *server;
1205 struct nfs_inode *nfsi = NFS_I(inode);
1206 loff_t cur_isize, new_isize;
1207 unsigned long invalid = 0;
1208 unsigned long now = jiffies;
1209 unsigned long save_cache_validity;
1210 bool cache_revalidated = true;
1212 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1213 __func__, inode->i_sb->s_id, inode->i_ino,
1214 atomic_read(&inode->i_count), fattr->valid);
1216 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1220 * Make sure the inode's type hasn't changed.
1222 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1225 server = NFS_SERVER(inode);
1226 /* Update the fsid? */
1227 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1228 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1229 !IS_AUTOMOUNT(inode))
1230 server->fsid = fattr->fsid;
1233 * Update the read time so we don't revalidate too often.
1235 nfsi->read_cache_jiffies = fattr->time_start;
1237 save_cache_validity = nfsi->cache_validity;
1238 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1239 | NFS_INO_INVALID_ATIME
1240 | NFS_INO_REVAL_FORCED
1241 | NFS_INO_REVAL_PAGECACHE);
1243 /* Do atomic weak cache consistency updates */
1244 invalid |= nfs_wcc_update_inode(inode, fattr);
1246 /* More cache consistency checks */
1247 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1248 if (inode->i_version != fattr->change_attr) {
1249 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1250 inode->i_sb->s_id, inode->i_ino);
1251 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1252 if (S_ISDIR(inode->i_mode))
1253 nfs_force_lookup_revalidate(inode);
1254 inode->i_version = fattr->change_attr;
1256 } else if (server->caps & NFS_CAP_CHANGE_ATTR) {
1257 invalid |= save_cache_validity;
1258 cache_revalidated = false;
1261 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1262 /* NFSv2/v3: Check if the mtime agrees */
1263 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1264 dprintk("NFS: mtime change on server for file %s/%ld\n",
1265 inode->i_sb->s_id, inode->i_ino);
1266 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1267 if (S_ISDIR(inode->i_mode))
1268 nfs_force_lookup_revalidate(inode);
1269 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1271 } else if (server->caps & NFS_CAP_MTIME) {
1272 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1273 | NFS_INO_INVALID_DATA
1274 | NFS_INO_REVAL_PAGECACHE
1275 | NFS_INO_REVAL_FORCED);
1276 cache_revalidated = false;
1279 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1280 /* If ctime has changed we should definitely clear access+acl caches */
1281 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1282 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1283 /* and probably clear data for a directory too as utimes can cause
1284 * havoc with our cache.
1286 if (S_ISDIR(inode->i_mode)) {
1287 invalid |= NFS_INO_INVALID_DATA;
1288 nfs_force_lookup_revalidate(inode);
1290 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1292 } else if (server->caps & NFS_CAP_CTIME) {
1293 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1294 | NFS_INO_INVALID_ACCESS
1295 | NFS_INO_INVALID_ACL
1296 | NFS_INO_REVAL_FORCED);
1297 cache_revalidated = false;
1300 /* Check if our cached file size is stale */
1301 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1302 new_isize = nfs_size_to_loff_t(fattr->size);
1303 cur_isize = i_size_read(inode);
1304 if (new_isize != cur_isize) {
1305 /* Do we perhaps have any outstanding writes, or has
1306 * the file grown beyond our last write? */
1307 if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) ||
1308 new_isize > cur_isize) {
1309 i_size_write(inode, new_isize);
1310 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1312 dprintk("NFS: isize change on server for file %s/%ld "
1316 (long long)cur_isize,
1317 (long long)new_isize);
1320 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1321 | NFS_INO_REVAL_PAGECACHE
1322 | NFS_INO_REVAL_FORCED);
1323 cache_revalidated = false;
1327 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1328 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1329 else if (server->caps & NFS_CAP_ATIME) {
1330 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1331 | NFS_INO_REVAL_FORCED);
1332 cache_revalidated = false;
1335 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1336 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1337 umode_t newmode = inode->i_mode & S_IFMT;
1338 newmode |= fattr->mode & S_IALLUGO;
1339 inode->i_mode = newmode;
1340 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1342 } else if (server->caps & NFS_CAP_MODE) {
1343 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1344 | NFS_INO_INVALID_ACCESS
1345 | NFS_INO_INVALID_ACL
1346 | NFS_INO_REVAL_FORCED);
1347 cache_revalidated = false;
1350 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1351 if (inode->i_uid != fattr->uid) {
1352 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1353 inode->i_uid = fattr->uid;
1355 } else if (server->caps & NFS_CAP_OWNER) {
1356 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1357 | NFS_INO_INVALID_ACCESS
1358 | NFS_INO_INVALID_ACL
1359 | NFS_INO_REVAL_FORCED);
1360 cache_revalidated = false;
1363 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1364 if (inode->i_gid != fattr->gid) {
1365 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1366 inode->i_gid = fattr->gid;
1368 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
1369 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1370 | NFS_INO_INVALID_ACCESS
1371 | NFS_INO_INVALID_ACL
1372 | NFS_INO_REVAL_FORCED);
1373 cache_revalidated = false;
1376 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1377 if (inode->i_nlink != fattr->nlink) {
1378 invalid |= NFS_INO_INVALID_ATTR;
1379 if (S_ISDIR(inode->i_mode))
1380 invalid |= NFS_INO_INVALID_DATA;
1381 set_nlink(inode, fattr->nlink);
1383 } else if (server->caps & NFS_CAP_NLINK) {
1384 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1385 | NFS_INO_REVAL_FORCED);
1386 cache_revalidated = false;
1389 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1391 * report the blocks in 512byte units
1393 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1394 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1395 inode->i_blocks = fattr->du.nfs2.blocks;
1397 cache_revalidated = false;
1399 /* Update attrtimeo value if we're out of the unstable period */
1400 if (invalid & NFS_INO_INVALID_ATTR) {
1401 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1402 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1403 nfsi->attrtimeo_timestamp = now;
1404 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1406 if (cache_revalidated) {
1407 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
1408 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1409 nfsi->attrtimeo <<= 1;
1410 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
1411 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1413 nfsi->attrtimeo_timestamp = now;
1417 /* Don't declare attrcache up to date if there were no attrs! */
1418 if (cache_revalidated)
1419 invalid &= ~NFS_INO_INVALID_ATTR;
1421 /* Don't invalidate the data if we were to blame */
1422 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1423 || S_ISLNK(inode->i_mode)))
1424 invalid &= ~NFS_INO_INVALID_DATA;
1425 if (!nfs_have_delegation(inode, FMODE_READ) ||
1426 (save_cache_validity & NFS_INO_REVAL_FORCED))
1427 nfsi->cache_validity |= invalid;
1432 * Big trouble! The inode has become a different object.
1434 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1435 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1438 * No need to worry about unhashing the dentry, as the
1439 * lookup validation will know that the inode is bad.
1440 * (But we fall through to invalidate the caches.)
1442 nfs_invalidate_inode(inode);
1446 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1447 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1448 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1449 (long long)nfsi->fileid, (long long)fattr->fileid);
1454 #ifdef CONFIG_NFS_V4
1457 * Clean out any remaining NFSv4 state that might be left over due
1458 * to open() calls that passed nfs_atomic_lookup, but failed to call
1461 void nfs4_evict_inode(struct inode *inode)
1463 truncate_inode_pages(&inode->i_data, 0);
1464 end_writeback(inode);
1465 pnfs_return_layout(inode);
1466 pnfs_destroy_layout(NFS_I(inode));
1467 /* If we are holding a delegation, return it! */
1468 nfs_inode_return_delegation_noreclaim(inode);
1469 /* First call standard NFS clear_inode() code */
1470 nfs_clear_inode(inode);
1474 struct inode *nfs_alloc_inode(struct super_block *sb)
1476 struct nfs_inode *nfsi;
1477 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1481 nfsi->cache_validity = 0UL;
1482 #ifdef CONFIG_NFS_V3_ACL
1483 nfsi->acl_access = ERR_PTR(-EAGAIN);
1484 nfsi->acl_default = ERR_PTR(-EAGAIN);
1486 #ifdef CONFIG_NFS_V4
1487 nfsi->nfs4_acl = NULL;
1488 #endif /* CONFIG_NFS_V4 */
1489 return &nfsi->vfs_inode;
1492 static void nfs_i_callback(struct rcu_head *head)
1494 struct inode *inode = container_of(head, struct inode, i_rcu);
1495 INIT_LIST_HEAD(&inode->i_dentry);
1496 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1499 void nfs_destroy_inode(struct inode *inode)
1501 call_rcu(&inode->i_rcu, nfs_i_callback);
1504 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1506 #ifdef CONFIG_NFS_V4
1507 INIT_LIST_HEAD(&nfsi->open_states);
1508 nfsi->delegation = NULL;
1509 nfsi->delegation_state = 0;
1510 init_rwsem(&nfsi->rwsem);
1511 nfsi->layout = NULL;
1512 atomic_set(&nfsi->commits_outstanding, 0);
1516 static void init_once(void *foo)
1518 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1520 inode_init_once(&nfsi->vfs_inode);
1521 INIT_LIST_HEAD(&nfsi->open_files);
1522 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1523 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1524 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1527 atomic_set(&nfsi->silly_count, 1);
1528 INIT_HLIST_HEAD(&nfsi->silly_list);
1529 init_waitqueue_head(&nfsi->waitqueue);
1530 nfs4_init_once(nfsi);
1533 static int __init nfs_init_inodecache(void)
1535 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1536 sizeof(struct nfs_inode),
1537 0, (SLAB_RECLAIM_ACCOUNT|
1540 if (nfs_inode_cachep == NULL)
1546 static void nfs_destroy_inodecache(void)
1548 kmem_cache_destroy(nfs_inode_cachep);
1551 struct workqueue_struct *nfsiod_workqueue;
1554 * start up the nfsiod workqueue
1556 static int nfsiod_start(void)
1558 struct workqueue_struct *wq;
1559 dprintk("RPC: creating workqueue nfsiod\n");
1560 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
1563 nfsiod_workqueue = wq;
1568 * Destroy the nfsiod workqueue
1570 static void nfsiod_stop(void)
1572 struct workqueue_struct *wq;
1574 wq = nfsiod_workqueue;
1577 nfsiod_workqueue = NULL;
1578 destroy_workqueue(wq);
1584 static int __init init_nfs_fs(void)
1588 err = nfs_idmap_init();
1592 err = nfs_dns_resolver_init();
1596 err = nfs_fscache_register();
1600 err = nfsiod_start();
1604 err = nfs_fs_proc_init();
1608 err = nfs_init_nfspagecache();
1612 err = nfs_init_inodecache();
1616 err = nfs_init_readpagecache();
1620 err = nfs_init_writepagecache();
1624 err = nfs_init_directcache();
1628 #ifdef CONFIG_PROC_FS
1629 rpc_proc_register(&nfs_rpcstat);
1631 if ((err = register_nfs_fs()) != 0)
1635 #ifdef CONFIG_PROC_FS
1636 rpc_proc_unregister("nfs");
1638 nfs_destroy_directcache();
1640 nfs_destroy_writepagecache();
1642 nfs_destroy_readpagecache();
1644 nfs_destroy_inodecache();
1646 nfs_destroy_nfspagecache();
1652 nfs_fscache_unregister();
1654 nfs_dns_resolver_destroy();
1661 static void __exit exit_nfs_fs(void)
1663 nfs_destroy_directcache();
1664 nfs_destroy_writepagecache();
1665 nfs_destroy_readpagecache();
1666 nfs_destroy_inodecache();
1667 nfs_destroy_nfspagecache();
1668 nfs_fscache_unregister();
1669 nfs_dns_resolver_destroy();
1671 #ifdef CONFIG_PROC_FS
1672 rpc_proc_unregister("nfs");
1674 nfs_cleanup_cb_ident_idr();
1675 unregister_nfs_fs();
1680 /* Not quite true; I just maintain it */
1681 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1682 MODULE_LICENSE("GPL");
1683 module_param(enable_ino64, bool, 0644);
1685 module_init(init_nfs_fs)
1686 module_exit(exit_nfs_fs)