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>
41 #include <linux/freezer.h>
42 #include <linux/crc32.h>
44 #include <asm/uaccess.h>
48 #include "delegation.h"
52 #include "dns_resolve.h"
56 #define NFSDBG_FACILITY NFSDBG_VFS
58 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
60 /* Default is to see 64-bit inode numbers */
61 static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
63 static void nfs_invalidate_inode(struct inode *);
64 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
66 static struct kmem_cache * nfs_inode_cachep;
68 static inline unsigned long
69 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
71 return nfs_fileid_to_ino_t(fattr->fileid);
75 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
76 * @word: long word containing the bit lock
78 int nfs_wait_bit_killable(void *word)
80 if (fatal_signal_pending(current))
87 * nfs_compat_user_ino64 - returns the user-visible inode number
88 * @fileid: 64-bit fileid
90 * This function returns a 32-bit inode number if the boot parameter
91 * nfs.enable_ino64 is zero.
93 u64 nfs_compat_user_ino64(u64 fileid)
104 if (sizeof(ino) < sizeof(fileid))
105 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
109 static void nfs_clear_inode(struct inode *inode)
112 * The following should never happen...
114 BUG_ON(nfs_have_writebacks(inode));
115 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
116 nfs_zap_acl_cache(inode);
117 nfs_access_zap_cache(inode);
118 nfs_fscache_release_inode_cookie(inode);
121 void nfs_evict_inode(struct inode *inode)
123 truncate_inode_pages(&inode->i_data, 0);
124 end_writeback(inode);
125 nfs_clear_inode(inode);
129 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
131 int nfs_sync_mapping(struct address_space *mapping)
135 if (mapping->nrpages != 0) {
136 unmap_mapping_range(mapping, 0, 0, 0);
137 ret = nfs_wb_all(mapping->host);
143 * Invalidate the local caches
145 static void nfs_zap_caches_locked(struct inode *inode)
147 struct nfs_inode *nfsi = NFS_I(inode);
148 int mode = inode->i_mode;
150 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
152 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
153 nfsi->attrtimeo_timestamp = jiffies;
155 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
156 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
157 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
159 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
162 void nfs_zap_caches(struct inode *inode)
164 spin_lock(&inode->i_lock);
165 nfs_zap_caches_locked(inode);
166 spin_unlock(&inode->i_lock);
169 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
171 if (mapping->nrpages != 0) {
172 spin_lock(&inode->i_lock);
173 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
174 spin_unlock(&inode->i_lock);
178 void nfs_zap_acl_cache(struct inode *inode)
180 void (*clear_acl_cache)(struct inode *);
182 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
183 if (clear_acl_cache != NULL)
184 clear_acl_cache(inode);
185 spin_lock(&inode->i_lock);
186 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
187 spin_unlock(&inode->i_lock);
190 void nfs_invalidate_atime(struct inode *inode)
192 spin_lock(&inode->i_lock);
193 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
194 spin_unlock(&inode->i_lock);
198 * Invalidate, but do not unhash, the inode.
199 * NB: must be called with inode->i_lock held!
201 static void nfs_invalidate_inode(struct inode *inode)
203 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
204 nfs_zap_caches_locked(inode);
207 struct nfs_find_desc {
209 struct nfs_fattr *fattr;
213 * In NFSv3 we can have 64bit inode numbers. In order to support
214 * this, and re-exported directories (also seen in NFSv2)
215 * we are forced to allow 2 different inodes to have the same
219 nfs_find_actor(struct inode *inode, void *opaque)
221 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
222 struct nfs_fh *fh = desc->fh;
223 struct nfs_fattr *fattr = desc->fattr;
225 if (NFS_FILEID(inode) != fattr->fileid)
227 if (nfs_compare_fh(NFS_FH(inode), fh))
229 if (is_bad_inode(inode) || NFS_STALE(inode))
235 nfs_init_locked(struct inode *inode, void *opaque)
237 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
238 struct nfs_fattr *fattr = desc->fattr;
240 set_nfs_fileid(inode, fattr->fileid);
241 nfs_copy_fh(NFS_FH(inode), desc->fh);
246 * This is our front-end to iget that looks up inodes by file handle
247 * instead of inode number.
250 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
252 struct nfs_find_desc desc = {
256 struct inode *inode = ERR_PTR(-ENOENT);
259 nfs_attr_check_mountpoint(sb, fattr);
261 if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) &&
262 !nfs_attr_use_mounted_on_fileid(fattr))
264 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
267 hash = nfs_fattr_to_ino_t(fattr);
269 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
271 inode = ERR_PTR(-ENOMEM);
275 if (inode->i_state & I_NEW) {
276 struct nfs_inode *nfsi = NFS_I(inode);
277 unsigned long now = jiffies;
279 /* We set i_ino for the few things that still rely on it,
283 /* We can't support update_atime(), since the server will reset it */
284 inode->i_flags |= S_NOATIME|S_NOCMTIME;
285 inode->i_mode = fattr->mode;
286 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
287 && nfs_server_capable(inode, NFS_CAP_MODE))
288 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
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 /* Deal with crossing mountpoints */
302 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
303 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
304 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
305 inode->i_op = &nfs_referral_inode_operations;
307 inode->i_op = &nfs_mountpoint_inode_operations;
309 inode->i_flags |= S_AUTOMOUNT;
311 } else if (S_ISLNK(inode->i_mode))
312 inode->i_op = &nfs_symlink_inode_operations;
314 init_special_inode(inode, inode->i_mode, fattr->rdev);
316 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
317 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
318 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
319 inode->i_version = 0;
325 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
327 nfsi->read_cache_jiffies = fattr->time_start;
328 nfsi->attr_gencount = fattr->gencount;
329 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
330 inode->i_atime = fattr->atime;
331 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
332 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
333 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
334 inode->i_mtime = fattr->mtime;
335 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
336 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
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 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
342 inode->i_version = fattr->change_attr;
343 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
344 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
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_REVAL_PAGECACHE;
350 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
351 set_nlink(inode, fattr->nlink);
352 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
353 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
354 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
355 inode->i_uid = fattr->uid;
356 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
357 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
358 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
359 inode->i_gid = fattr->gid;
360 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
361 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
362 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
363 inode->i_blocks = fattr->du.nfs2.blocks;
364 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
366 * report the blocks in 512byte units
368 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
370 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
371 nfsi->attrtimeo_timestamp = now;
372 nfsi->access_cache = RB_ROOT;
374 nfs_fscache_init_inode_cookie(inode);
376 unlock_new_inode(inode);
378 nfs_refresh_inode(inode, fattr);
379 dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n",
381 (long long)NFS_FILEID(inode),
382 nfs_display_fhandle_hash(fh),
383 atomic_read(&inode->i_count));
389 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
393 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
396 nfs_setattr(struct dentry *dentry, struct iattr *attr)
398 struct inode *inode = dentry->d_inode;
399 struct nfs_fattr *fattr;
402 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
404 /* skip mode change if it's just for clearing setuid/setgid */
405 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
406 attr->ia_valid &= ~ATTR_MODE;
408 if (attr->ia_valid & ATTR_SIZE) {
409 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
410 attr->ia_valid &= ~ATTR_SIZE;
413 /* Optimization: if the end result is no change, don't RPC */
414 attr->ia_valid &= NFS_VALID_ATTRS;
415 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
418 /* Write all dirty data */
419 if (S_ISREG(inode->i_mode))
422 fattr = nfs_alloc_fattr();
426 * Return any delegations if we're going to change ACLs
428 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
429 nfs_inode_return_delegation(inode);
430 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
432 nfs_refresh_inode(inode, fattr);
433 nfs_free_fattr(fattr);
439 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
440 * @inode: inode of the file used
441 * @offset: file offset to start truncating
443 * This is a copy of the common vmtruncate, but with the locking
444 * corrected to take into account the fact that NFS requires
445 * inode->i_size to be updated under the inode->i_lock.
447 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
452 err = inode_newsize_ok(inode, offset);
456 spin_lock(&inode->i_lock);
457 oldsize = inode->i_size;
458 i_size_write(inode, offset);
459 spin_unlock(&inode->i_lock);
461 truncate_pagecache(inode, oldsize, offset);
467 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
468 * @inode: pointer to struct inode
469 * @attr: pointer to struct iattr
471 * Note: we do this in the *proc.c in order to ensure that
472 * it works for things like exclusive creates too.
474 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
476 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
477 spin_lock(&inode->i_lock);
478 if ((attr->ia_valid & ATTR_MODE) != 0) {
479 int mode = attr->ia_mode & S_IALLUGO;
480 mode |= inode->i_mode & ~S_IALLUGO;
481 inode->i_mode = mode;
483 if ((attr->ia_valid & ATTR_UID) != 0)
484 inode->i_uid = attr->ia_uid;
485 if ((attr->ia_valid & ATTR_GID) != 0)
486 inode->i_gid = attr->ia_gid;
487 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
488 spin_unlock(&inode->i_lock);
490 if ((attr->ia_valid & ATTR_SIZE) != 0) {
491 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
492 nfs_vmtruncate(inode, attr->ia_size);
496 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
498 struct inode *inode = dentry->d_inode;
499 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
502 /* Flush out writes to the server in order to update c/mtime. */
503 if (S_ISREG(inode->i_mode)) {
504 err = filemap_write_and_wait(inode->i_mapping);
510 * We may force a getattr if the user cares about atime.
512 * Note that we only have to check the vfsmount flags here:
513 * - NFS always sets S_NOATIME by so checking it would give a
515 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
516 * no point in checking those.
518 if ((mnt->mnt_flags & MNT_NOATIME) ||
519 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
523 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
525 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
527 generic_fillattr(inode, stat);
528 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
534 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
536 atomic_set(&l_ctx->count, 1);
537 l_ctx->lockowner = current->files;
538 l_ctx->pid = current->tgid;
539 INIT_LIST_HEAD(&l_ctx->list);
542 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
544 struct nfs_lock_context *pos;
546 list_for_each_entry(pos, &ctx->lock_context.list, list) {
547 if (pos->lockowner != current->files)
549 if (pos->pid != current->tgid)
551 atomic_inc(&pos->count);
557 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
559 struct nfs_lock_context *res, *new = NULL;
560 struct inode *inode = ctx->dentry->d_inode;
562 spin_lock(&inode->i_lock);
563 res = __nfs_find_lock_context(ctx);
565 spin_unlock(&inode->i_lock);
566 new = kmalloc(sizeof(*new), GFP_KERNEL);
569 nfs_init_lock_context(new);
570 spin_lock(&inode->i_lock);
571 res = __nfs_find_lock_context(ctx);
573 list_add_tail(&new->list, &ctx->lock_context.list);
574 new->open_context = ctx;
579 spin_unlock(&inode->i_lock);
584 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
586 struct nfs_open_context *ctx = l_ctx->open_context;
587 struct inode *inode = ctx->dentry->d_inode;
589 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
591 list_del(&l_ctx->list);
592 spin_unlock(&inode->i_lock);
597 * nfs_close_context - Common close_context() routine NFSv2/v3
598 * @ctx: pointer to context
599 * @is_sync: is this a synchronous close
601 * always ensure that the attributes are up to date if we're mounted
602 * with close-to-open semantics
604 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
607 struct nfs_server *server;
609 if (!(ctx->mode & FMODE_WRITE))
613 inode = ctx->dentry->d_inode;
614 if (!list_empty(&NFS_I(inode)->open_files))
616 server = NFS_SERVER(inode);
617 if (server->flags & NFS_MOUNT_NOCTO)
619 nfs_revalidate_inode(server, inode);
622 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode)
624 struct nfs_open_context *ctx;
625 struct rpc_cred *cred = rpc_lookup_cred();
627 return ERR_CAST(cred);
629 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
632 return ERR_PTR(-ENOMEM);
634 nfs_sb_active(dentry->d_sb);
635 ctx->dentry = dget(dentry);
641 nfs_init_lock_context(&ctx->lock_context);
642 ctx->lock_context.open_context = ctx;
643 INIT_LIST_HEAD(&ctx->list);
644 ctx->mdsthreshold = NULL;
648 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
651 atomic_inc(&ctx->lock_context.count);
655 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
657 struct inode *inode = ctx->dentry->d_inode;
658 struct super_block *sb = ctx->dentry->d_sb;
660 if (!list_empty(&ctx->list)) {
661 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
663 list_del(&ctx->list);
664 spin_unlock(&inode->i_lock);
665 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
668 NFS_PROTO(inode)->close_context(ctx, is_sync);
669 if (ctx->cred != NULL)
670 put_rpccred(ctx->cred);
673 kfree(ctx->mdsthreshold);
677 void put_nfs_open_context(struct nfs_open_context *ctx)
679 __put_nfs_open_context(ctx, 0);
683 * Ensure that mmap has a recent RPC credential for use when writing out
686 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
688 struct inode *inode = filp->f_path.dentry->d_inode;
689 struct nfs_inode *nfsi = NFS_I(inode);
691 filp->private_data = get_nfs_open_context(ctx);
692 spin_lock(&inode->i_lock);
693 list_add(&ctx->list, &nfsi->open_files);
694 spin_unlock(&inode->i_lock);
698 * Given an inode, search for an open context with the desired characteristics
700 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
702 struct nfs_inode *nfsi = NFS_I(inode);
703 struct nfs_open_context *pos, *ctx = NULL;
705 spin_lock(&inode->i_lock);
706 list_for_each_entry(pos, &nfsi->open_files, list) {
707 if (cred != NULL && pos->cred != cred)
709 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
711 ctx = get_nfs_open_context(pos);
714 spin_unlock(&inode->i_lock);
718 static void nfs_file_clear_open_context(struct file *filp)
720 struct inode *inode = filp->f_path.dentry->d_inode;
721 struct nfs_open_context *ctx = nfs_file_open_context(filp);
724 filp->private_data = NULL;
725 spin_lock(&inode->i_lock);
726 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
727 spin_unlock(&inode->i_lock);
728 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
733 * These allocate and release file read/write context information.
735 int nfs_open(struct inode *inode, struct file *filp)
737 struct nfs_open_context *ctx;
739 ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
742 nfs_file_set_open_context(filp, ctx);
743 put_nfs_open_context(ctx);
744 nfs_fscache_set_inode_cookie(inode, filp);
748 int nfs_release(struct inode *inode, struct file *filp)
750 nfs_file_clear_open_context(filp);
755 * This function is called whenever some part of NFS notices that
756 * the cached attributes have to be refreshed.
759 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
761 int status = -ESTALE;
762 struct nfs_fattr *fattr = NULL;
763 struct nfs_inode *nfsi = NFS_I(inode);
765 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
766 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
768 if (is_bad_inode(inode))
770 if (NFS_STALE(inode))
774 fattr = nfs_alloc_fattr();
778 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
779 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
781 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
783 (long long)NFS_FILEID(inode), status);
784 if (status == -ESTALE) {
785 nfs_zap_caches(inode);
786 if (!S_ISDIR(inode->i_mode))
787 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
792 status = nfs_refresh_inode(inode, fattr);
794 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
796 (long long)NFS_FILEID(inode), status);
800 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
801 nfs_zap_acl_cache(inode);
803 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
805 (long long)NFS_FILEID(inode));
808 nfs_free_fattr(fattr);
812 int nfs_attribute_timeout(struct inode *inode)
814 struct nfs_inode *nfsi = NFS_I(inode);
816 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
819 static int nfs_attribute_cache_expired(struct inode *inode)
821 if (nfs_have_delegated_attributes(inode))
823 return nfs_attribute_timeout(inode);
827 * nfs_revalidate_inode - Revalidate the inode attributes
828 * @server - pointer to nfs_server struct
829 * @inode - pointer to inode struct
831 * Updates inode attribute information by retrieving the data from the server.
833 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
835 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
836 && !nfs_attribute_cache_expired(inode))
837 return NFS_STALE(inode) ? -ESTALE : 0;
838 return __nfs_revalidate_inode(server, inode);
841 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
843 struct nfs_inode *nfsi = NFS_I(inode);
845 if (mapping->nrpages != 0) {
846 int ret = invalidate_inode_pages2(mapping);
850 spin_lock(&inode->i_lock);
851 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
852 if (S_ISDIR(inode->i_mode))
853 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
854 spin_unlock(&inode->i_lock);
855 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
856 nfs_fscache_reset_inode_cookie(inode);
857 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
858 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
862 static bool nfs_mapping_need_revalidate_inode(struct inode *inode)
864 if (nfs_have_delegated_attributes(inode))
866 return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE)
867 || nfs_attribute_timeout(inode)
872 * nfs_revalidate_mapping - Revalidate the pagecache
873 * @inode - pointer to host inode
874 * @mapping - pointer to mapping
876 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
878 struct nfs_inode *nfsi = NFS_I(inode);
881 if (nfs_mapping_need_revalidate_inode(inode)) {
882 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
886 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
887 ret = nfs_invalidate_mapping(inode, mapping);
892 static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
894 struct nfs_inode *nfsi = NFS_I(inode);
895 unsigned long ret = 0;
897 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
898 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
899 && inode->i_version == fattr->pre_change_attr) {
900 inode->i_version = fattr->change_attr;
901 if (S_ISDIR(inode->i_mode))
902 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
903 ret |= NFS_INO_INVALID_ATTR;
905 /* If we have atomic WCC data, we may update some attributes */
906 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
907 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
908 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
909 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
910 ret |= NFS_INO_INVALID_ATTR;
913 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
914 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
915 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
916 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
917 if (S_ISDIR(inode->i_mode))
918 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
919 ret |= NFS_INO_INVALID_ATTR;
921 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
922 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
923 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
924 && nfsi->npages == 0) {
925 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
926 ret |= NFS_INO_INVALID_ATTR;
932 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
933 * @inode - pointer to inode
934 * @fattr - updated attributes
936 * Verifies the attribute cache. If we have just changed the attributes,
937 * so that fattr carries weak cache consistency data, then it may
938 * also update the ctime/mtime/change_attribute.
940 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
942 struct nfs_inode *nfsi = NFS_I(inode);
943 loff_t cur_size, new_isize;
944 unsigned long invalid = 0;
947 if (nfs_have_delegated_attributes(inode))
949 /* Has the inode gone and changed behind our back? */
950 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
952 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
955 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
956 inode->i_version != fattr->change_attr)
957 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
959 /* Verify a few of the more important attributes */
960 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
961 invalid |= NFS_INO_INVALID_ATTR;
963 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
964 cur_size = i_size_read(inode);
965 new_isize = nfs_size_to_loff_t(fattr->size);
966 if (cur_size != new_isize && nfsi->npages == 0)
967 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
970 /* Have any file permissions changed? */
971 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
972 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
973 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
974 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
975 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
976 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
978 /* Has the link count changed? */
979 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
980 invalid |= NFS_INO_INVALID_ATTR;
982 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
983 invalid |= NFS_INO_INVALID_ATIME;
986 nfsi->cache_validity |= invalid;
988 nfsi->read_cache_jiffies = fattr->time_start;
992 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
994 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
996 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
999 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1001 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
1003 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
1006 static atomic_long_t nfs_attr_generation_counter;
1008 static unsigned long nfs_read_attr_generation_counter(void)
1010 return atomic_long_read(&nfs_attr_generation_counter);
1013 unsigned long nfs_inc_attr_generation_counter(void)
1015 return atomic_long_inc_return(&nfs_attr_generation_counter);
1018 void nfs_fattr_init(struct nfs_fattr *fattr)
1021 fattr->time_start = jiffies;
1022 fattr->gencount = nfs_inc_attr_generation_counter();
1023 fattr->owner_name = NULL;
1024 fattr->group_name = NULL;
1027 struct nfs_fattr *nfs_alloc_fattr(void)
1029 struct nfs_fattr *fattr;
1031 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1033 nfs_fattr_init(fattr);
1037 struct nfs_fh *nfs_alloc_fhandle(void)
1041 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1049 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1050 * in the same way that wireshark does
1054 * For debugging only.
1056 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1058 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1059 * not on the result */
1060 return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size);
1064 * _nfs_display_fhandle - display an NFS file handle on the console
1066 * @fh: file handle to display
1067 * @caption: display caption
1069 * For debugging only.
1071 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1075 if (fh == NULL || fh->size == 0) {
1076 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1080 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1081 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1082 for (i = 0; i < fh->size; i += 16) {
1083 __be32 *pos = (__be32 *)&fh->data[i];
1085 switch ((fh->size - i - 1) >> 2) {
1087 printk(KERN_DEFAULT " %08x\n",
1091 printk(KERN_DEFAULT " %08x %08x\n",
1092 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1095 printk(KERN_DEFAULT " %08x %08x %08x\n",
1096 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1097 be32_to_cpup(pos + 2));
1100 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1101 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1102 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1109 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1110 * @inode - pointer to inode
1111 * @fattr - attributes
1113 * Attempt to divine whether or not an RPC call reply carrying stale
1114 * attributes got scheduled after another call carrying updated ones.
1116 * To do so, the function first assumes that a more recent ctime means
1117 * that the attributes in fattr are newer, however it also attempt to
1118 * catch the case where ctime either didn't change, or went backwards
1119 * (if someone reset the clock on the server) by looking at whether
1120 * or not this RPC call was started after the inode was last updated.
1121 * Note also the check for wraparound of 'attr_gencount'
1123 * The function returns 'true' if it thinks the attributes in 'fattr' are
1124 * more recent than the ones cached in the inode.
1127 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1129 const struct nfs_inode *nfsi = NFS_I(inode);
1131 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1132 nfs_ctime_need_update(inode, fattr) ||
1133 nfs_size_need_update(inode, fattr) ||
1134 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1137 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1139 if (nfs_inode_attrs_need_update(inode, fattr))
1140 return nfs_update_inode(inode, fattr);
1141 return nfs_check_inode_attributes(inode, fattr);
1145 * nfs_refresh_inode - try to update the inode attribute cache
1146 * @inode - pointer to inode
1147 * @fattr - updated attributes
1149 * Check that an RPC call that returned attributes has not overlapped with
1150 * other recent updates of the inode metadata, then decide whether it is
1151 * safe to do a full update of the inode attributes, or whether just to
1152 * call nfs_check_inode_attributes.
1154 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1158 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1160 spin_lock(&inode->i_lock);
1161 status = nfs_refresh_inode_locked(inode, fattr);
1162 spin_unlock(&inode->i_lock);
1167 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1169 struct nfs_inode *nfsi = NFS_I(inode);
1171 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1172 if (S_ISDIR(inode->i_mode))
1173 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1174 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1176 return nfs_refresh_inode_locked(inode, fattr);
1180 * nfs_post_op_update_inode - try to update the inode attribute cache
1181 * @inode - pointer to inode
1182 * @fattr - updated attributes
1184 * After an operation that has changed the inode metadata, mark the
1185 * attribute cache as being invalid, then try to update it.
1187 * NB: if the server didn't return any post op attributes, this
1188 * function will force the retrieval of attributes before the next
1189 * NFS request. Thus it should be used only for operations that
1190 * are expected to change one or more attributes, to avoid
1191 * unnecessary NFS requests and trips through nfs_update_inode().
1193 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1197 spin_lock(&inode->i_lock);
1198 status = nfs_post_op_update_inode_locked(inode, fattr);
1199 spin_unlock(&inode->i_lock);
1204 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1205 * @inode - pointer to inode
1206 * @fattr - updated attributes
1208 * After an operation that has changed the inode metadata, mark the
1209 * attribute cache as being invalid, then try to update it. Fake up
1210 * weak cache consistency data, if none exist.
1212 * This function is mainly designed to be used by the ->write_done() functions.
1214 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1218 spin_lock(&inode->i_lock);
1219 /* Don't do a WCC update if these attributes are already stale */
1220 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1221 !nfs_inode_attrs_need_update(inode, fattr)) {
1222 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1223 | NFS_ATTR_FATTR_PRESIZE
1224 | NFS_ATTR_FATTR_PREMTIME
1225 | NFS_ATTR_FATTR_PRECTIME);
1228 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1229 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1230 fattr->pre_change_attr = inode->i_version;
1231 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1233 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1234 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1235 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1236 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1238 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1239 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1240 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1241 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1243 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1244 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1245 fattr->pre_size = i_size_read(inode);
1246 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1249 status = nfs_post_op_update_inode_locked(inode, fattr);
1250 spin_unlock(&inode->i_lock);
1255 * Many nfs protocol calls return the new file attributes after
1256 * an operation. Here we update the inode to reflect the state
1257 * of the server's inode.
1259 * This is a bit tricky because we have to make sure all dirty pages
1260 * have been sent off to the server before calling invalidate_inode_pages.
1261 * To make sure no other process adds more write requests while we try
1262 * our best to flush them, we make them sleep during the attribute refresh.
1264 * A very similar scenario holds for the dir cache.
1266 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1268 struct nfs_server *server;
1269 struct nfs_inode *nfsi = NFS_I(inode);
1270 loff_t cur_isize, new_isize;
1271 unsigned long invalid = 0;
1272 unsigned long now = jiffies;
1273 unsigned long save_cache_validity;
1275 dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n",
1276 __func__, inode->i_sb->s_id, inode->i_ino,
1277 nfs_display_fhandle_hash(NFS_FH(inode)),
1278 atomic_read(&inode->i_count), fattr->valid);
1280 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) {
1281 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1282 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1283 NFS_SERVER(inode)->nfs_client->cl_hostname,
1284 inode->i_sb->s_id, (long long)nfsi->fileid,
1285 (long long)fattr->fileid);
1290 * Make sure the inode's type hasn't changed.
1292 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1294 * Big trouble! The inode has become a different object.
1296 printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n",
1297 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1301 server = NFS_SERVER(inode);
1302 /* Update the fsid? */
1303 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1304 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1305 !IS_AUTOMOUNT(inode))
1306 server->fsid = fattr->fsid;
1309 * Update the read time so we don't revalidate too often.
1311 nfsi->read_cache_jiffies = fattr->time_start;
1313 save_cache_validity = nfsi->cache_validity;
1314 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1315 | NFS_INO_INVALID_ATIME
1316 | NFS_INO_REVAL_FORCED
1317 | NFS_INO_REVAL_PAGECACHE);
1319 /* Do atomic weak cache consistency updates */
1320 invalid |= nfs_wcc_update_inode(inode, fattr);
1322 /* More cache consistency checks */
1323 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1324 if (inode->i_version != fattr->change_attr) {
1325 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1326 inode->i_sb->s_id, inode->i_ino);
1327 invalid |= NFS_INO_INVALID_ATTR
1328 | NFS_INO_INVALID_DATA
1329 | NFS_INO_INVALID_ACCESS
1330 | NFS_INO_INVALID_ACL
1331 | NFS_INO_REVAL_PAGECACHE;
1332 if (S_ISDIR(inode->i_mode))
1333 nfs_force_lookup_revalidate(inode);
1334 inode->i_version = fattr->change_attr;
1336 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1337 invalid |= save_cache_validity;
1339 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1340 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1341 } else if (server->caps & NFS_CAP_MTIME)
1342 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1343 | NFS_INO_REVAL_FORCED);
1345 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1346 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1347 } else if (server->caps & NFS_CAP_CTIME)
1348 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1349 | NFS_INO_REVAL_FORCED);
1351 /* Check if our cached file size is stale */
1352 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1353 new_isize = nfs_size_to_loff_t(fattr->size);
1354 cur_isize = i_size_read(inode);
1355 if (new_isize != cur_isize) {
1356 /* Do we perhaps have any outstanding writes, or has
1357 * the file grown beyond our last write? */
1358 if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) ||
1359 new_isize > cur_isize) {
1360 i_size_write(inode, new_isize);
1361 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1363 dprintk("NFS: isize change on server for file %s/%ld "
1367 (long long)cur_isize,
1368 (long long)new_isize);
1371 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1372 | NFS_INO_REVAL_PAGECACHE
1373 | NFS_INO_REVAL_FORCED);
1376 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1377 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1378 else if (server->caps & NFS_CAP_ATIME)
1379 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1380 | NFS_INO_REVAL_FORCED);
1382 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1383 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1384 umode_t newmode = inode->i_mode & S_IFMT;
1385 newmode |= fattr->mode & S_IALLUGO;
1386 inode->i_mode = newmode;
1387 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1389 } else if (server->caps & NFS_CAP_MODE)
1390 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1391 | NFS_INO_INVALID_ACCESS
1392 | NFS_INO_INVALID_ACL
1393 | NFS_INO_REVAL_FORCED);
1395 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1396 if (inode->i_uid != fattr->uid) {
1397 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1398 inode->i_uid = fattr->uid;
1400 } else if (server->caps & NFS_CAP_OWNER)
1401 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1402 | NFS_INO_INVALID_ACCESS
1403 | NFS_INO_INVALID_ACL
1404 | NFS_INO_REVAL_FORCED);
1406 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1407 if (inode->i_gid != fattr->gid) {
1408 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1409 inode->i_gid = fattr->gid;
1411 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1412 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1413 | NFS_INO_INVALID_ACCESS
1414 | NFS_INO_INVALID_ACL
1415 | NFS_INO_REVAL_FORCED);
1417 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1418 if (inode->i_nlink != fattr->nlink) {
1419 invalid |= NFS_INO_INVALID_ATTR;
1420 if (S_ISDIR(inode->i_mode))
1421 invalid |= NFS_INO_INVALID_DATA;
1422 set_nlink(inode, fattr->nlink);
1424 } else if (server->caps & NFS_CAP_NLINK)
1425 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1426 | NFS_INO_REVAL_FORCED);
1428 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1430 * report the blocks in 512byte units
1432 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1434 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1435 inode->i_blocks = fattr->du.nfs2.blocks;
1437 /* Update attrtimeo value if we're out of the unstable period */
1438 if (invalid & NFS_INO_INVALID_ATTR) {
1439 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1440 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1441 nfsi->attrtimeo_timestamp = now;
1442 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1444 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1445 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1446 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1447 nfsi->attrtimeo_timestamp = now;
1450 invalid &= ~NFS_INO_INVALID_ATTR;
1451 /* Don't invalidate the data if we were to blame */
1452 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1453 || S_ISLNK(inode->i_mode)))
1454 invalid &= ~NFS_INO_INVALID_DATA;
1455 if (!nfs_have_delegation(inode, FMODE_READ) ||
1456 (save_cache_validity & NFS_INO_REVAL_FORCED))
1457 nfsi->cache_validity |= invalid;
1462 * No need to worry about unhashing the dentry, as the
1463 * lookup validation will know that the inode is bad.
1464 * (But we fall through to invalidate the caches.)
1466 nfs_invalidate_inode(inode);
1471 #ifdef CONFIG_NFS_V4
1474 * Clean out any remaining NFSv4 state that might be left over due
1475 * to open() calls that passed nfs_atomic_lookup, but failed to call
1478 void nfs4_evict_inode(struct inode *inode)
1480 truncate_inode_pages(&inode->i_data, 0);
1481 end_writeback(inode);
1482 pnfs_return_layout(inode);
1483 pnfs_destroy_layout(NFS_I(inode));
1484 /* If we are holding a delegation, return it! */
1485 nfs_inode_return_delegation_noreclaim(inode);
1486 /* First call standard NFS clear_inode() code */
1487 nfs_clear_inode(inode);
1491 struct inode *nfs_alloc_inode(struct super_block *sb)
1493 struct nfs_inode *nfsi;
1494 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1498 nfsi->cache_validity = 0UL;
1499 #ifdef CONFIG_NFS_V3_ACL
1500 nfsi->acl_access = ERR_PTR(-EAGAIN);
1501 nfsi->acl_default = ERR_PTR(-EAGAIN);
1503 #ifdef CONFIG_NFS_V4
1504 nfsi->nfs4_acl = NULL;
1505 #endif /* CONFIG_NFS_V4 */
1506 return &nfsi->vfs_inode;
1509 static void nfs_i_callback(struct rcu_head *head)
1511 struct inode *inode = container_of(head, struct inode, i_rcu);
1512 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1515 void nfs_destroy_inode(struct inode *inode)
1517 call_rcu(&inode->i_rcu, nfs_i_callback);
1520 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1522 #ifdef CONFIG_NFS_V4
1523 INIT_LIST_HEAD(&nfsi->open_states);
1524 nfsi->delegation = NULL;
1525 nfsi->delegation_state = 0;
1526 init_rwsem(&nfsi->rwsem);
1527 nfsi->layout = NULL;
1528 atomic_set(&nfsi->commit_info.rpcs_out, 0);
1532 static void init_once(void *foo)
1534 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1536 inode_init_once(&nfsi->vfs_inode);
1537 INIT_LIST_HEAD(&nfsi->open_files);
1538 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1539 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1540 INIT_LIST_HEAD(&nfsi->commit_info.list);
1542 nfsi->commit_info.ncommit = 0;
1543 atomic_set(&nfsi->silly_count, 1);
1544 INIT_HLIST_HEAD(&nfsi->silly_list);
1545 init_waitqueue_head(&nfsi->waitqueue);
1546 nfs4_init_once(nfsi);
1549 static int __init nfs_init_inodecache(void)
1551 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1552 sizeof(struct nfs_inode),
1553 0, (SLAB_RECLAIM_ACCOUNT|
1556 if (nfs_inode_cachep == NULL)
1562 static void nfs_destroy_inodecache(void)
1564 kmem_cache_destroy(nfs_inode_cachep);
1567 struct workqueue_struct *nfsiod_workqueue;
1570 * start up the nfsiod workqueue
1572 static int nfsiod_start(void)
1574 struct workqueue_struct *wq;
1575 dprintk("RPC: creating workqueue nfsiod\n");
1576 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
1579 nfsiod_workqueue = wq;
1584 * Destroy the nfsiod workqueue
1586 static void nfsiod_stop(void)
1588 struct workqueue_struct *wq;
1590 wq = nfsiod_workqueue;
1593 nfsiod_workqueue = NULL;
1594 destroy_workqueue(wq);
1598 EXPORT_SYMBOL_GPL(nfs_net_id);
1600 static int nfs_net_init(struct net *net)
1602 nfs_clients_init(net);
1603 return nfs_dns_resolver_cache_init(net);
1606 static void nfs_net_exit(struct net *net)
1608 nfs_dns_resolver_cache_destroy(net);
1609 nfs_cleanup_cb_ident_idr(net);
1612 static struct pernet_operations nfs_net_ops = {
1613 .init = nfs_net_init,
1614 .exit = nfs_net_exit,
1616 .size = sizeof(struct nfs_net),
1622 static int __init init_nfs_fs(void)
1626 err = nfs_idmap_init();
1630 err = nfs_dns_resolver_init();
1634 err = register_pernet_subsys(&nfs_net_ops);
1638 err = nfs_fscache_register();
1642 err = nfsiod_start();
1646 err = nfs_fs_proc_init();
1650 err = nfs_init_nfspagecache();
1654 err = nfs_init_inodecache();
1658 err = nfs_init_readpagecache();
1662 err = nfs_init_writepagecache();
1666 err = nfs_init_directcache();
1670 #ifdef CONFIG_PROC_FS
1671 rpc_proc_register(&init_net, &nfs_rpcstat);
1673 if ((err = register_nfs_fs()) != 0)
1677 #ifdef CONFIG_PROC_FS
1678 rpc_proc_unregister(&init_net, "nfs");
1680 nfs_destroy_directcache();
1682 nfs_destroy_writepagecache();
1684 nfs_destroy_readpagecache();
1686 nfs_destroy_inodecache();
1688 nfs_destroy_nfspagecache();
1694 nfs_fscache_unregister();
1696 unregister_pernet_subsys(&nfs_net_ops);
1698 nfs_dns_resolver_destroy();
1705 static void __exit exit_nfs_fs(void)
1707 nfs_destroy_directcache();
1708 nfs_destroy_writepagecache();
1709 nfs_destroy_readpagecache();
1710 nfs_destroy_inodecache();
1711 nfs_destroy_nfspagecache();
1712 nfs_fscache_unregister();
1713 unregister_pernet_subsys(&nfs_net_ops);
1714 nfs_dns_resolver_destroy();
1716 #ifdef CONFIG_PROC_FS
1717 rpc_proc_unregister(&init_net, "nfs");
1719 unregister_nfs_fs();
1724 /* Not quite true; I just maintain it */
1725 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1726 MODULE_LICENSE("GPL");
1727 module_param(enable_ino64, bool, 0644);
1729 module_init(init_nfs_fs)
1730 module_exit(exit_nfs_fs)