blob: e358df75a6ad2e4f64361298fa335bed78c5c6ab [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/nfs/inode.c
3 *
4 * Copyright (C) 1992 Rick Sladkey
5 *
6 * nfs inode and superblock handling functions
7 *
Alan Cox526719b2008-10-27 15:19:48 +00008 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
10 *
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
13 *
14 */
15
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/module.h>
17#include <linux/init.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040018#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/time.h>
20#include <linux/kernel.h>
21#include <linux/mm.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>
Chuck Lever4ece3a22006-03-20 13:44:22 -050028#include <linux/sunrpc/metrics.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/nfs_fs.h>
30#include <linux/nfs_mount.h>
31#include <linux/nfs4_mount.h>
32#include <linux/lockd/bind.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/seq_file.h>
34#include <linux/mount.h>
35#include <linux/nfs_idmap.h>
36#include <linux/vfs.h>
Manoj Naik9cdb3882006-06-09 09:34:28 -040037#include <linux/inet.h>
38#include <linux/nfs_xdr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
40#include <asm/system.h>
41#include <asm/uaccess.h>
42
Trond Myklebust4ce79712005-06-22 17:16:21 +000043#include "nfs4_fs.h"
Trond Myklebusta72b4422006-01-03 09:55:41 +010044#include "callback.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include "delegation.h"
Chuck Leverd9ef5a82006-03-20 13:44:13 -050046#include "iostat.h"
David Howellsf7b422b2006-06-09 09:34:33 -040047#include "internal.h"
David Howells8ec442a2009-04-03 16:42:42 +010048#include "fscache.h"
Trond Myklebuste571cbf2009-08-19 18:12:27 -040049#include "dns_resolve.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#define NFSDBG_FACILITY NFSDBG_VFS
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040053#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
54
55/* Default is to see 64-bit inode numbers */
56static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058static void nfs_invalidate_inode(struct inode *);
Trond Myklebust24aa1fe2005-12-03 15:20:07 -050059static int nfs_update_inode(struct inode *, struct nfs_fattr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
Christoph Lametere18b8902006-12-06 20:33:20 -080061static struct kmem_cache * nfs_inode_cachep;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000062
Linus Torvalds1da177e2005-04-16 15:20:36 -070063static inline unsigned long
64nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
65{
66 return nfs_fileid_to_ino_t(fattr->fileid);
67}
68
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040069/**
Trond Myklebust72cb77f2009-03-11 14:10:30 -040070 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
71 * @word: long word containing the bit lock
72 */
73int nfs_wait_bit_killable(void *word)
74{
75 if (fatal_signal_pending(current))
76 return -ERESTARTSYS;
77 schedule();
78 return 0;
79}
80
81/**
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040082 * nfs_compat_user_ino64 - returns the user-visible inode number
83 * @fileid: 64-bit fileid
84 *
85 * This function returns a 32-bit inode number if the boot parameter
86 * nfs.enable_ino64 is zero.
87 */
88u64 nfs_compat_user_ino64(u64 fileid)
89{
90 int ino;
91
92 if (enable_ino64)
93 return fileid;
94 ino = fileid;
95 if (sizeof(ino) < sizeof(fileid))
96 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
97 return ino;
98}
99
David Howellsf7b422b2006-06-09 09:34:33 -0400100void nfs_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
Trond Myklebustda6d5032006-06-01 17:26:35 -0400102 /*
103 * The following should never happen...
104 */
105 BUG_ON(nfs_have_writebacks(inode));
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400106 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
Trond Myklebustada70d92005-06-22 17:16:22 +0000107 nfs_zap_acl_cache(inode);
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400108 nfs_access_zap_cache(inode);
David Howellsef79c092009-04-03 16:42:43 +0100109 nfs_fscache_release_inode_cookie(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
Trond Myklebust29884df2005-12-13 16:13:54 -0500112/**
113 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
114 */
115int nfs_sync_mapping(struct address_space *mapping)
116{
Trond Myklebust5cf95212010-02-19 17:03:29 -0800117 int ret = 0;
Trond Myklebust29884df2005-12-13 16:13:54 -0500118
Trond Myklebust5cf95212010-02-19 17:03:29 -0800119 if (mapping->nrpages != 0) {
120 unmap_mapping_range(mapping, 0, 0, 0);
121 ret = nfs_wb_all(mapping->host);
122 }
Trond Myklebust29884df2005-12-13 16:13:54 -0500123 return ret;
124}
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126/*
127 * Invalidate the local caches
128 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500129static void nfs_zap_caches_locked(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130{
131 struct nfs_inode *nfsi = NFS_I(inode);
132 int mode = inode->i_mode;
133
Chuck Lever91d5b472006-03-20 13:44:14 -0500134 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
135
Trond Myklebustc7c20972007-09-28 19:22:40 -0400136 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
137 nfsi->attrtimeo_timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
139 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
140 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
Chuck Lever55296802005-08-18 11:24:09 -0700141 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 else
Chuck Lever55296802005-08-18 11:24:09 -0700143 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500144}
Chuck Leverdc592502005-08-18 11:24:12 -0700145
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500146void nfs_zap_caches(struct inode *inode)
147{
148 spin_lock(&inode->i_lock);
149 nfs_zap_caches_locked(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700150 spin_unlock(&inode->i_lock);
Trond Myklebustada70d92005-06-22 17:16:22 +0000151}
152
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700153void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
154{
155 if (mapping->nrpages != 0) {
156 spin_lock(&inode->i_lock);
157 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
158 spin_unlock(&inode->i_lock);
159 }
160}
161
Trond Myklebustf41f7412008-06-11 17:39:04 -0400162void nfs_zap_acl_cache(struct inode *inode)
Trond Myklebustada70d92005-06-22 17:16:22 +0000163{
164 void (*clear_acl_cache)(struct inode *);
165
166 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
167 if (clear_acl_cache != NULL)
168 clear_acl_cache(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700169 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700170 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700171 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172}
173
Trond Myklebustc4812992007-09-28 17:11:45 -0400174void nfs_invalidate_atime(struct inode *inode)
175{
176 spin_lock(&inode->i_lock);
177 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
178 spin_unlock(&inode->i_lock);
179}
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/*
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500182 * Invalidate, but do not unhash, the inode.
183 * NB: must be called with inode->i_lock held!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500185static void nfs_invalidate_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Benny Halevy3a10c302008-01-23 08:58:59 +0200187 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500188 nfs_zap_caches_locked(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189}
190
191struct nfs_find_desc {
192 struct nfs_fh *fh;
193 struct nfs_fattr *fattr;
194};
195
196/*
197 * In NFSv3 we can have 64bit inode numbers. In order to support
198 * this, and re-exported directories (also seen in NFSv2)
199 * we are forced to allow 2 different inodes to have the same
200 * i_ino.
201 */
202static int
203nfs_find_actor(struct inode *inode, void *opaque)
204{
205 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
206 struct nfs_fh *fh = desc->fh;
207 struct nfs_fattr *fattr = desc->fattr;
208
209 if (NFS_FILEID(inode) != fattr->fileid)
210 return 0;
211 if (nfs_compare_fh(NFS_FH(inode), fh))
212 return 0;
213 if (is_bad_inode(inode) || NFS_STALE(inode))
214 return 0;
215 return 1;
216}
217
218static int
219nfs_init_locked(struct inode *inode, void *opaque)
220{
221 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
222 struct nfs_fattr *fattr = desc->fattr;
223
Benny Halevy99fadcd2008-01-23 08:59:08 +0200224 set_nfs_fileid(inode, fattr->fileid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 nfs_copy_fh(NFS_FH(inode), desc->fh);
226 return 0;
227}
228
229/* Don't use READDIRPLUS on directories that we believe are too large */
230#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
231
232/*
233 * This is our front-end to iget that looks up inodes by file handle
234 * instead of inode number.
235 */
236struct inode *
237nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
238{
239 struct nfs_find_desc desc = {
240 .fh = fh,
241 .fattr = fattr
242 };
Trond Myklebust03f28e32006-03-20 13:44:48 -0500243 struct inode *inode = ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 unsigned long hash;
245
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400246 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 goto out_no_inode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400248 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 goto out_no_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 hash = nfs_fattr_to_ino_t(fattr);
252
Trond Myklebust03f28e32006-03-20 13:44:48 -0500253 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
254 if (inode == NULL) {
255 inode = ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 goto out_no_inode;
Trond Myklebust03f28e32006-03-20 13:44:48 -0500257 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 if (inode->i_state & I_NEW) {
260 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800261 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 /* We set i_ino for the few things that still rely on it,
264 * such as stat(2) */
265 inode->i_ino = hash;
266
267 /* We can't support update_atime(), since the server will reset it */
268 inode->i_flags |= S_NOATIME|S_NOCMTIME;
269 inode->i_mode = fattr->mode;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400270 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
271 && nfs_server_capable(inode, NFS_CAP_MODE))
272 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
273 | NFS_INO_INVALID_ACCESS
274 | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 /* Why so? Because we want revalidate for devices/FIFOs, and
276 * that's precisely what we have in nfs_file_inode_operations.
277 */
David Howells8fa5c002006-08-22 20:06:12 -0400278 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 if (S_ISREG(inode->i_mode)) {
280 inode->i_fop = &nfs_file_operations;
281 inode->i_data.a_ops = &nfs_file_aops;
282 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
283 } else if (S_ISDIR(inode->i_mode)) {
David Howells8fa5c002006-08-22 20:06:12 -0400284 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 inode->i_fop = &nfs_dir_operations;
286 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
287 && fattr->size <= NFS_LIMIT_READDIRPLUS)
Benny Halevy3a10c302008-01-23 08:58:59 +0200288 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400289 /* Deal with crossing mountpoints */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400290 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
291 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
Manoj Naik6b97fd32006-06-09 09:34:29 -0400292 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
293 inode->i_op = &nfs_referral_inode_operations;
294 else
295 inode->i_op = &nfs_mountpoint_inode_operations;
Trond Myklebust55a97592006-06-09 09:34:19 -0400296 inode->i_fop = NULL;
Trond Myklebustc37dcd332008-03-06 12:34:50 -0500297 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400298 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 } else if (S_ISLNK(inode->i_mode))
300 inode->i_op = &nfs_symlink_inode_operations;
301 else
302 init_special_inode(inode, inode->i_mode, fattr->rdev);
303
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400304 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
305 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
306 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
307 nfsi->change_attr = 0;
308 inode->i_size = 0;
309 inode->i_nlink = 0;
310 inode->i_uid = -2;
311 inode->i_gid = -2;
312 inode->i_blocks = 0;
313 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
314
Trond Myklebust33801142005-10-27 22:12:39 -0400315 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400316 nfsi->attr_gencount = fattr->gencount;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400317 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
318 inode->i_atime = fattr->atime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400319 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
320 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400321 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
322 inode->i_mtime = fattr->mtime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400323 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
324 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
325 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400326 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
327 inode->i_ctime = fattr->ctime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400328 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
329 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
330 | NFS_INO_INVALID_ACCESS
331 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400332 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 nfsi->change_attr = fattr->change_attr;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400334 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
335 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
336 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400337 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
338 inode->i_size = nfs_size_to_loff_t(fattr->size);
Trond Myklebust62ab4602009-08-09 15:06:19 -0400339 else
340 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
341 | NFS_INO_INVALID_DATA
342 | NFS_INO_REVAL_PAGECACHE;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400343 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
344 inode->i_nlink = fattr->nlink;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400345 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
346 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400347 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
348 inode->i_uid = fattr->uid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400349 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
350 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
351 | NFS_INO_INVALID_ACCESS
352 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400353 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
354 inode->i_gid = fattr->gid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400355 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
356 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
357 | NFS_INO_INVALID_ACCESS
358 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400359 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
360 inode->i_blocks = fattr->du.nfs2.blocks;
361 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 /*
363 * report the blocks in 512byte units
364 */
365 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 }
367 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800368 nfsi->attrtimeo_timestamp = now;
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400369 nfsi->access_cache = RB_ROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
David Howellsef79c092009-04-03 16:42:43 +0100371 nfs_fscache_init_inode_cookie(inode);
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 unlock_new_inode(inode);
374 } else
375 nfs_refresh_inode(inode, fattr);
376 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
377 inode->i_sb->s_id,
378 (long long)NFS_FILEID(inode),
379 atomic_read(&inode->i_count));
380
381out:
382 return inode;
383
384out_no_inode:
Trond Myklebust03f28e32006-03-20 13:44:48 -0500385 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 goto out;
387}
388
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400389#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391int
392nfs_setattr(struct dentry *dentry, struct iattr *attr)
393{
394 struct inode *inode = dentry->d_inode;
395 struct nfs_fattr fattr;
396 int error;
397
Chuck Lever91d5b472006-03-20 13:44:14 -0500398 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
399
Jeff Layton188b95d2007-10-18 03:05:21 -0700400 /* skip mode change if it's just for clearing setuid/setgid */
401 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
402 attr->ia_valid &= ~ATTR_MODE;
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 if (attr->ia_valid & ATTR_SIZE) {
405 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
406 attr->ia_valid &= ~ATTR_SIZE;
407 }
408
409 /* Optimization: if the end result is no change, don't RPC */
410 attr->ia_valid &= NFS_VALID_ATTRS;
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400411 if ((attr->ia_valid & ~ATTR_FILE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 return 0;
413
Trond Myklebust755c1e22006-03-20 13:44:06 -0500414 /* Write all dirty data */
Trond Myklebuste1552e12007-04-14 19:07:28 -0400415 if (S_ISREG(inode->i_mode)) {
416 filemap_write_and_wait(inode->i_mapping);
417 nfs_wb_all(inode);
418 }
Trond Myklebust642ac542005-10-18 14:20:19 -0700419 /*
420 * Return any delegations if we're going to change ACLs
421 */
422 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
423 nfs_inode_return_delegation(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400425 if (error == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 nfs_refresh_inode(inode, &fattr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400427 return error;
428}
429
430/**
Trond Myklebusta3d01452008-06-11 12:21:19 -0400431 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
432 * @inode: inode of the file used
433 * @offset: file offset to start truncating
434 *
435 * This is a copy of the common vmtruncate, but with the locking
436 * corrected to take into account the fact that NFS requires
437 * inode->i_size to be updated under the inode->i_lock.
438 */
439static int nfs_vmtruncate(struct inode * inode, loff_t offset)
440{
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000441 loff_t oldsize;
442 int err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400443
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000444 err = inode_newsize_ok(inode, offset);
445 if (err)
446 goto out;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400447
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000448 spin_lock(&inode->i_lock);
449 oldsize = inode->i_size;
450 i_size_write(inode, offset);
451 spin_unlock(&inode->i_lock);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400452
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000453 truncate_pagecache(inode, oldsize, offset);
454out:
455 return err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400456}
457
458/**
Trond Myklebust65e43082005-08-16 11:49:44 -0400459 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
460 * @inode: pointer to struct inode
461 * @attr: pointer to struct iattr
462 *
463 * Note: we do this in the *proc.c in order to ensure that
464 * it works for things like exclusive creates too.
465 */
466void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
467{
468 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
Trond Myklebust2f28ea62008-10-05 14:26:11 -0400469 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 if ((attr->ia_valid & ATTR_MODE) != 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -0400471 int mode = attr->ia_mode & S_IALLUGO;
472 mode |= inode->i_mode & ~S_IALLUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 inode->i_mode = mode;
474 }
475 if ((attr->ia_valid & ATTR_UID) != 0)
476 inode->i_uid = attr->ia_uid;
477 if ((attr->ia_valid & ATTR_GID) != 0)
478 inode->i_gid = attr->ia_gid;
Chuck Lever55296802005-08-18 11:24:09 -0700479 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700480 spin_unlock(&inode->i_lock);
Trond Myklebust65e43082005-08-16 11:49:44 -0400481 }
482 if ((attr->ia_valid & ATTR_SIZE) != 0) {
Chuck Lever91d5b472006-03-20 13:44:14 -0500483 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400484 nfs_vmtruncate(inode, attr->ia_size);
Trond Myklebust65e43082005-08-16 11:49:44 -0400485 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486}
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
489{
490 struct inode *inode = dentry->d_inode;
Chuck Lever55296802005-08-18 11:24:09 -0700491 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 int err;
493
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800494 /* Flush out writes to the server in order to update c/mtime. */
Chuck Lever28c494c2007-10-26 13:32:13 -0400495 if (S_ISREG(inode->i_mode)) {
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800496 err = filemap_write_and_wait(inode->i_mapping);
497 if (err)
498 goto out;
Chuck Lever28c494c2007-10-26 13:32:13 -0400499 }
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800500
501 /*
502 * We may force a getattr if the user cares about atime.
503 *
504 * Note that we only have to check the vfsmount flags here:
505 * - NFS always sets S_NOATIME by so checking it would give a
506 * bogus result
507 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
508 * no point in checking those.
509 */
510 if ((mnt->mnt_flags & MNT_NOATIME) ||
511 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 need_atime = 0;
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800513
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 if (need_atime)
515 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
516 else
517 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
Peter Staubach4e769b92007-08-03 15:07:10 -0400518 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 generic_fillattr(inode, stat);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400520 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
Peter Staubach4e769b92007-08-03 15:07:10 -0400521 }
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800522out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 return err;
524}
525
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400526/**
527 * nfs_close_context - Common close_context() routine NFSv2/v3
528 * @ctx: pointer to context
529 * @is_sync: is this a synchronous close
530 *
531 * always ensure that the attributes are up to date if we're mounted
532 * with close-to-open semantics
533 */
534void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
535{
536 struct inode *inode;
537 struct nfs_server *server;
538
539 if (!(ctx->mode & FMODE_WRITE))
540 return;
541 if (!is_sync)
542 return;
543 inode = ctx->path.dentry->d_inode;
544 if (!list_empty(&NFS_I(inode)->open_files))
545 return;
546 server = NFS_SERVER(inode);
547 if (server->flags & NFS_MOUNT_NOCTO)
548 return;
549 nfs_revalidate_inode(server, inode);
550}
551
Al Viro6eae7972010-01-30 13:44:07 -0500552static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553{
554 struct nfs_open_context *ctx;
555
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700556 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 if (ctx != NULL) {
Al Viro6eae7972010-01-30 13:44:07 -0500558 ctx->path = *path;
559 path_get(&ctx->path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 ctx->cred = get_rpccred(cred);
561 ctx->state = NULL;
562 ctx->lockowner = current->files;
Jeff Layton66d3aac2008-03-31 15:01:58 -0400563 ctx->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 ctx->error = 0;
Olivier Galibert00a92642005-06-22 17:16:29 +0000565 ctx->dir_cookie = 0;
Trond Myklebust5e119342007-07-26 12:06:17 -0400566 atomic_set(&ctx->count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 }
568 return ctx;
569}
570
571struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
572{
573 if (ctx != NULL)
Trond Myklebust5e119342007-07-26 12:06:17 -0400574 atomic_inc(&ctx->count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 return ctx;
576}
577
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400578static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400579{
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400580 struct inode *inode = ctx->path.dentry->d_inode;
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400581
Trond Myklebust5e119342007-07-26 12:06:17 -0400582 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
583 return;
584 list_del(&ctx->list);
585 spin_unlock(&inode->i_lock);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400586 NFS_PROTO(inode)->close_context(ctx, is_sync);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400587 if (ctx->cred != NULL)
588 put_rpccred(ctx->cred);
Jan Blunck31f31db2008-05-02 13:42:45 -0700589 path_put(&ctx->path);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400590 kfree(ctx);
591}
592
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400593void put_nfs_open_context(struct nfs_open_context *ctx)
594{
595 __put_nfs_open_context(ctx, 0);
596}
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598/*
599 * Ensure that mmap has a recent RPC credential for use when writing out
600 * shared pages
601 */
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500602static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800604 struct inode *inode = filp->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 struct nfs_inode *nfsi = NFS_I(inode);
606
607 filp->private_data = get_nfs_open_context(ctx);
608 spin_lock(&inode->i_lock);
609 list_add(&ctx->list, &nfsi->open_files);
610 spin_unlock(&inode->i_lock);
611}
612
Trond Myklebustd5308382005-11-04 15:33:38 -0500613/*
614 * Given an inode, search for an open context with the desired characteristics
615 */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500616struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617{
618 struct nfs_inode *nfsi = NFS_I(inode);
619 struct nfs_open_context *pos, *ctx = NULL;
620
621 spin_lock(&inode->i_lock);
622 list_for_each_entry(pos, &nfsi->open_files, list) {
Trond Myklebustd5308382005-11-04 15:33:38 -0500623 if (cred != NULL && pos->cred != cred)
624 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 if ((pos->mode & mode) == mode) {
626 ctx = get_nfs_open_context(pos);
627 break;
628 }
629 }
630 spin_unlock(&inode->i_lock);
631 return ctx;
632}
633
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500634static void nfs_file_clear_open_context(struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800636 struct inode *inode = filp->f_path.dentry->d_inode;
Trond Myklebustcd3758e2007-08-10 17:44:32 -0400637 struct nfs_open_context *ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639 if (ctx) {
640 filp->private_data = NULL;
641 spin_lock(&inode->i_lock);
642 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
643 spin_unlock(&inode->i_lock);
Chuck Leverf895c532010-02-01 14:17:50 -0500644 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
646}
647
648/*
649 * These allocate and release file read/write context information.
650 */
651int nfs_open(struct inode *inode, struct file *filp)
652{
653 struct nfs_open_context *ctx;
654 struct rpc_cred *cred;
655
Trond Myklebust98a8e322008-03-12 12:25:28 -0400656 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 if (IS_ERR(cred))
658 return PTR_ERR(cred);
Al Viro6eae7972010-01-30 13:44:07 -0500659 ctx = alloc_nfs_open_context(&filp->f_path, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 put_rpccred(cred);
661 if (ctx == NULL)
662 return -ENOMEM;
663 ctx->mode = filp->f_mode;
664 nfs_file_set_open_context(filp, ctx);
665 put_nfs_open_context(ctx);
David Howellsef79c092009-04-03 16:42:43 +0100666 nfs_fscache_set_inode_cookie(inode, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 return 0;
668}
669
670int nfs_release(struct inode *inode, struct file *filp)
671{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 nfs_file_clear_open_context(filp);
673 return 0;
674}
675
676/*
677 * This function is called whenever some part of NFS notices that
678 * the cached attributes have to be refreshed.
679 */
680int
681__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
682{
683 int status = -ESTALE;
684 struct nfs_fattr fattr;
685 struct nfs_inode *nfsi = NFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
688 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
689
Chuck Lever85233a72006-10-19 23:28:42 -0700690 if (is_bad_inode(inode))
Chuck Lever412d5822005-08-18 11:24:11 -0700691 goto out;
Trond Myklebust7fdc49c2007-09-28 19:11:33 -0400692 if (NFS_STALE(inode))
693 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
Trond Myklebust691beb12008-10-05 14:48:22 -0400695 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
697 if (status != 0) {
698 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
699 inode->i_sb->s_id,
700 (long long)NFS_FILEID(inode), status);
701 if (status == -ESTALE) {
702 nfs_zap_caches(inode);
703 if (!S_ISDIR(inode->i_mode))
Benny Halevy3a10c302008-01-23 08:58:59 +0200704 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 }
706 goto out;
707 }
708
Trond Myklebust4dc05ef2008-09-23 17:28:42 -0400709 status = nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 if (status) {
711 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
712 inode->i_sb->s_id,
713 (long long)NFS_FILEID(inode), status);
714 goto out;
715 }
Chuck Lever55296802005-08-18 11:24:09 -0700716
Trond Myklebust24aa1fe2005-12-03 15:20:07 -0500717 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
Trond Myklebustada70d92005-06-22 17:16:22 +0000718 nfs_zap_acl_cache(inode);
Chuck Lever55296802005-08-18 11:24:09 -0700719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
721 inode->i_sb->s_id,
722 (long long)NFS_FILEID(inode));
723
Chuck Lever412d5822005-08-18 11:24:11 -0700724 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 return status;
726}
727
728int nfs_attribute_timeout(struct inode *inode)
729{
730 struct nfs_inode *nfsi = NFS_I(inode);
731
Trond Myklebustb4d23142010-03-10 15:21:44 -0500732 if (nfs_have_delegated_attributes(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 return 0;
Peter Staubach64672d52008-12-23 15:21:56 -0500734 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735}
736
737/**
738 * nfs_revalidate_inode - Revalidate the inode attributes
739 * @server - pointer to nfs_server struct
740 * @inode - pointer to inode struct
741 *
742 * Updates inode attribute information by retrieving the data from the server.
743 */
744int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
745{
Trond Myklebust44b11872006-05-25 01:40:59 -0400746 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 && !nfs_attribute_timeout(inode))
748 return NFS_STALE(inode) ? -ESTALE : 0;
749 return __nfs_revalidate_inode(server, inode);
750}
751
Trond Myklebust1cda7072010-02-19 17:03:30 -0800752static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800753{
754 struct nfs_inode *nfsi = NFS_I(inode);
755
756 if (mapping->nrpages != 0) {
757 int ret = invalidate_inode_pages2(mapping);
758 if (ret < 0)
759 return ret;
760 }
761 spin_lock(&inode->i_lock);
762 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
Trond Myklebust2f78e432007-09-30 15:31:19 -0400763 if (S_ISDIR(inode->i_mode))
Trond Myklebust717d44e2007-01-24 11:54:55 -0800764 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
Trond Myklebust717d44e2007-01-24 11:54:55 -0800765 spin_unlock(&inode->i_lock);
766 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
David Howellsef79c092009-04-03 16:42:43 +0100767 nfs_fscache_reset_inode_cookie(inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800768 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
769 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
770 return 0;
771}
772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773/**
Trond Myklebust7d52e862005-06-22 17:16:30 +0000774 * nfs_revalidate_mapping - Revalidate the pagecache
775 * @inode - pointer to host inode
776 * @mapping - pointer to mapping
777 */
Trond Myklebust44b11872006-05-25 01:40:59 -0400778int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust7d52e862005-06-22 17:16:30 +0000779{
780 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust44b11872006-05-25 01:40:59 -0400781 int ret = 0;
782
Trond Myklebust44b11872006-05-25 01:40:59 -0400783 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800784 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
Trond Myklebust44b11872006-05-25 01:40:59 -0400785 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800786 if (ret < 0)
787 goto out;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000788 }
Trond Myklebust717d44e2007-01-24 11:54:55 -0800789 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
790 ret = nfs_invalidate_mapping(inode, mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700791out:
Trond Myklebust44b11872006-05-25 01:40:59 -0400792 return ret;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000793}
794
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100795static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
796{
797 struct nfs_inode *nfsi = NFS_I(inode);
798
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400799 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
800 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
801 && nfsi->change_attr == fattr->pre_change_attr) {
Trond Myklebust70ca8852007-09-30 15:21:24 -0400802 nfsi->change_attr = fattr->change_attr;
803 if (S_ISDIR(inode->i_mode))
804 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
805 }
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100806 /* If we have atomic WCC data, we may update some attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400807 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
808 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
809 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100810 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400811
812 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
813 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
814 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100815 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebuste323ea42007-09-30 17:03:25 -0400816 if (S_ISDIR(inode->i_mode))
817 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100818 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400819 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
820 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
821 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
822 && nfsi->npages == 0)
823 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100824}
825
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826/**
Trond Myklebust33801142005-10-27 22:12:39 -0400827 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 * @inode - pointer to inode
829 * @fattr - updated attributes
830 *
831 * Verifies the attribute cache. If we have just changed the attributes,
832 * so that fattr carries weak cache consistency data, then it may
833 * also update the ctime/mtime/change_attribute.
834 */
Trond Myklebust33801142005-10-27 22:12:39 -0400835static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836{
837 struct nfs_inode *nfsi = NFS_I(inode);
838 loff_t cur_size, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400839 unsigned long invalid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
Chuck Leverdc592502005-08-18 11:24:12 -0700841
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 /* Has the inode gone and changed behind our back? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400843 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 return -EIO;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400845 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
846 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400848 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
Trond Myklebustf1bb0b92006-05-25 01:40:55 -0400849 nfsi->change_attr != fattr->change_attr)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400850 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 /* Verify a few of the more important attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400853 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400854 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Trond Myklebustca62b9c2006-03-20 13:44:07 -0500855
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400856 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
857 cur_size = i_size_read(inode);
858 new_isize = nfs_size_to_loff_t(fattr->size);
859 if (cur_size != new_isize && nfsi->npages == 0)
860 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
861 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862
863 /* Have any file permissions changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400864 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
865 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
866 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
867 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
868 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400869 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
871 /* Has the link count changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400872 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400873 invalid |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400875 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400876 invalid |= NFS_INO_INVALID_ATIME;
877
878 if (invalid != 0)
879 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Trond Myklebust33801142005-10-27 22:12:39 -0400881 nfsi->read_cache_jiffies = fattr->time_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 return 0;
883}
884
Trond Myklebusta10ad172008-09-23 17:28:41 -0400885static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
886{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400887 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
888 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400889 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
890}
891
892static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
893{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400894 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
895 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400896 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
897}
898
Trond Myklebustae05f262008-10-28 15:21:40 -0400899static atomic_long_t nfs_attr_generation_counter;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400900
901static unsigned long nfs_read_attr_generation_counter(void)
902{
Trond Myklebustae05f262008-10-28 15:21:40 -0400903 return atomic_long_read(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400904}
905
906unsigned long nfs_inc_attr_generation_counter(void)
907{
Trond Myklebustae05f262008-10-28 15:21:40 -0400908 return atomic_long_inc_return(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400909}
910
911void nfs_fattr_init(struct nfs_fattr *fattr)
912{
913 fattr->valid = 0;
914 fattr->time_start = jiffies;
915 fattr->gencount = nfs_inc_attr_generation_counter();
916}
917
Trond Myklebusta10ad172008-09-23 17:28:41 -0400918/**
919 * nfs_inode_attrs_need_update - check if the inode attributes need updating
920 * @inode - pointer to inode
921 * @fattr - attributes
922 *
923 * Attempt to divine whether or not an RPC call reply carrying stale
924 * attributes got scheduled after another call carrying updated ones.
925 *
926 * To do so, the function first assumes that a more recent ctime means
927 * that the attributes in fattr are newer, however it also attempt to
928 * catch the case where ctime either didn't change, or went backwards
929 * (if someone reset the clock on the server) by looking at whether
930 * or not this RPC call was started after the inode was last updated.
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400931 * Note also the check for wraparound of 'attr_gencount'
Trond Myklebusta10ad172008-09-23 17:28:41 -0400932 *
933 * The function returns 'true' if it thinks the attributes in 'fattr' are
934 * more recent than the ones cached in the inode.
935 *
936 */
937static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
938{
939 const struct nfs_inode *nfsi = NFS_I(inode);
940
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400941 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
Trond Myklebust03254e62008-10-09 13:27:55 -0400942 nfs_ctime_need_update(inode, fattr) ||
943 nfs_size_need_update(inode, fattr) ||
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400944 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
Trond Myklebusta10ad172008-09-23 17:28:41 -0400945}
946
Trond Myklebust870a5be2008-10-05 12:07:23 -0400947static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
948{
Trond Myklebusta10ad172008-09-23 17:28:41 -0400949 if (nfs_inode_attrs_need_update(inode, fattr))
Trond Myklebust870a5be2008-10-05 12:07:23 -0400950 return nfs_update_inode(inode, fattr);
951 return nfs_check_inode_attributes(inode, fattr);
952}
953
Trond Myklebust33801142005-10-27 22:12:39 -0400954/**
955 * nfs_refresh_inode - try to update the inode attribute cache
956 * @inode - pointer to inode
957 * @fattr - updated attributes
958 *
959 * Check that an RPC call that returned attributes has not overlapped with
960 * other recent updates of the inode metadata, then decide whether it is
961 * safe to do a full update of the inode attributes, or whether just to
962 * call nfs_check_inode_attributes.
963 */
964int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
965{
Trond Myklebust33801142005-10-27 22:12:39 -0400966 int status;
967
968 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
969 return 0;
970 spin_lock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -0400971 status = nfs_refresh_inode_locked(inode, fattr);
Trond Myklebust33801142005-10-27 22:12:39 -0400972 spin_unlock(&inode->i_lock);
David Howellsef79c092009-04-03 16:42:43 +0100973
Trond Myklebust33801142005-10-27 22:12:39 -0400974 return status;
975}
976
Trond Myklebustd65f5572008-10-05 12:27:55 -0400977static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
978{
979 struct nfs_inode *nfsi = NFS_I(inode);
980
981 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
982 if (S_ISDIR(inode->i_mode))
983 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
984 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
985 return 0;
986 return nfs_refresh_inode_locked(inode, fattr);
987}
988
Trond Myklebustdecf4912005-10-27 22:12:39 -0400989/**
990 * nfs_post_op_update_inode - try to update the inode attribute cache
991 * @inode - pointer to inode
992 * @fattr - updated attributes
993 *
994 * After an operation that has changed the inode metadata, mark the
995 * attribute cache as being invalid, then try to update it.
Chuck Leverf551e442006-09-20 14:33:04 -0400996 *
997 * NB: if the server didn't return any post op attributes, this
998 * function will force the retrieval of attributes before the next
999 * NFS request. Thus it should be used only for operations that
1000 * are expected to change one or more attributes, to avoid
1001 * unnecessary NFS requests and trips through nfs_update_inode().
Trond Myklebustdecf4912005-10-27 22:12:39 -04001002 */
1003int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1004{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001005 int status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001006
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001007 spin_lock(&inode->i_lock);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001008 status = nfs_post_op_update_inode_locked(inode, fattr);
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001009 spin_unlock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001010 return status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001011}
1012
Trond Myklebust70ca8852007-09-30 15:21:24 -04001013/**
1014 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1015 * @inode - pointer to inode
1016 * @fattr - updated attributes
1017 *
1018 * After an operation that has changed the inode metadata, mark the
1019 * attribute cache as being invalid, then try to update it. Fake up
1020 * weak cache consistency data, if none exist.
1021 *
1022 * This function is mainly designed to be used by the ->write_done() functions.
1023 */
1024int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1025{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001026 int status;
1027
1028 spin_lock(&inode->i_lock);
1029 /* Don't do a WCC update if these attributes are already stale */
1030 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1031 !nfs_inode_attrs_need_update(inode, fattr)) {
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001032 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1033 | NFS_ATTR_FATTR_PRESIZE
1034 | NFS_ATTR_FATTR_PREMTIME
1035 | NFS_ATTR_FATTR_PRECTIME);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001036 goto out_noforce;
1037 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001038 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1039 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001040 fattr->pre_change_attr = NFS_I(inode)->change_attr;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001041 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001042 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001043 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1044 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001045 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001046 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1047 }
1048 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1049 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001050 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001051 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1052 }
1053 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1054 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
Trond Myklebusta3d01452008-06-11 12:21:19 -04001055 fattr->pre_size = i_size_read(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001056 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001057 }
Trond Myklebustd65f5572008-10-05 12:27:55 -04001058out_noforce:
1059 status = nfs_post_op_update_inode_locked(inode, fattr);
1060 spin_unlock(&inode->i_lock);
1061 return status;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001062}
1063
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064/*
1065 * Many nfs protocol calls return the new file attributes after
1066 * an operation. Here we update the inode to reflect the state
1067 * of the server's inode.
1068 *
1069 * This is a bit tricky because we have to make sure all dirty pages
1070 * have been sent off to the server before calling invalidate_inode_pages.
1071 * To make sure no other process adds more write requests while we try
1072 * our best to flush them, we make them sleep during the attribute refresh.
1073 *
1074 * A very similar scenario holds for the dir cache.
1075 */
Trond Myklebust24aa1fe2005-12-03 15:20:07 -05001076static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077{
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001078 struct nfs_server *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001080 loff_t cur_isize, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -04001081 unsigned long invalid = 0;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001082 unsigned long now = jiffies;
Trond Myklebust62ab4602009-08-09 15:06:19 -04001083 unsigned long save_cache_validity;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
1085 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001086 __func__, inode->i_sb->s_id, inode->i_ino,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 atomic_read(&inode->i_count), fattr->valid);
1088
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001089 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Chuck Lever325cfed2005-11-30 18:08:55 -05001090 goto out_fileid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 /*
1093 * Make sure the inode's type hasn't changed.
1094 */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001095 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 goto out_changed;
1097
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001098 server = NFS_SERVER(inode);
Trond Myklebusta0356862007-06-05 13:26:15 -04001099 /* Update the fsid? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001100 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Trond Myklebustc37dcd332008-03-06 12:34:50 -05001101 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1102 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001103 server->fsid = fattr->fsid;
1104
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 /*
1106 * Update the read time so we don't revalidate too often.
1107 */
Trond Myklebust33801142005-10-27 22:12:39 -04001108 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001109
Trond Myklebust62ab4602009-08-09 15:06:19 -04001110 save_cache_validity = nfsi->cache_validity;
1111 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1112 | NFS_INO_INVALID_ATIME
1113 | NFS_INO_REVAL_FORCED
1114 | NFS_INO_REVAL_PAGECACHE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115
Trond Myklebusta895b4a2006-01-03 09:55:40 +01001116 /* Do atomic weak cache consistency updates */
1117 nfs_wcc_update_inode(inode, fattr);
1118
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001119 /* More cache consistency checks */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001120 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1121 if (nfsi->change_attr != fattr->change_attr) {
1122 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1123 inode->i_sb->s_id, inode->i_ino);
1124 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1125 if (S_ISDIR(inode->i_mode))
1126 nfs_force_lookup_revalidate(inode);
1127 nfsi->change_attr = fattr->change_attr;
1128 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001129 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1130 invalid |= save_cache_validity;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001131
1132 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001133 /* NFSv2/v3: Check if the mtime agrees */
1134 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1135 dprintk("NFS: mtime change on server for file %s/%ld\n",
1136 inode->i_sb->s_id, inode->i_ino);
1137 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebustbfc69a42007-10-15 18:18:29 -04001138 if (S_ISDIR(inode->i_mode))
1139 nfs_force_lookup_revalidate(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001140 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001141 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001142 } else if (server->caps & NFS_CAP_MTIME)
1143 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1144 | NFS_INO_INVALID_DATA
1145 | NFS_INO_REVAL_PAGECACHE
1146 | NFS_INO_REVAL_FORCED);
1147
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001148 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001149 /* If ctime has changed we should definitely clear access+acl caches */
NeilBrown37d9d762009-03-11 14:10:23 -04001150 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001151 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
NeilBrown37d9d762009-03-11 14:10:23 -04001152 /* and probably clear data for a directory too as utimes can cause
1153 * havoc with our cache.
1154 */
1155 if (S_ISDIR(inode->i_mode)) {
1156 invalid |= NFS_INO_INVALID_DATA;
1157 nfs_force_lookup_revalidate(inode);
1158 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001159 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
NeilBrown37d9d762009-03-11 14:10:23 -04001160 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001161 } else if (server->caps & NFS_CAP_CTIME)
1162 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1163 | NFS_INO_INVALID_ACCESS
1164 | NFS_INO_INVALID_ACL
1165 | NFS_INO_REVAL_FORCED);
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001166
Trond Myklebust951a1432005-06-22 17:16:30 +00001167 /* Check if our cached file size is stale */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001168 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1169 new_isize = nfs_size_to_loff_t(fattr->size);
1170 cur_isize = i_size_read(inode);
1171 if (new_isize != cur_isize) {
1172 /* Do we perhaps have any outstanding writes, or has
1173 * the file grown beyond our last write? */
1174 if (nfsi->npages == 0 || new_isize > cur_isize) {
1175 i_size_write(inode, new_isize);
1176 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1177 }
1178 dprintk("NFS: isize change on server for file %s/%ld\n",
1179 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001181 } else
1182 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1183 | NFS_INO_REVAL_PAGECACHE
1184 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001187 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1188 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
Trond Myklebust62ab4602009-08-09 15:06:19 -04001189 else if (server->caps & NFS_CAP_ATIME)
1190 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1191 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001193 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1194 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
Trond Myklebust9b4b3512010-02-03 08:27:35 -05001195 umode_t newmode = inode->i_mode & S_IFMT;
1196 newmode |= fattr->mode & S_IALLUGO;
1197 inode->i_mode = newmode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001198 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001199 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001200 } else if (server->caps & NFS_CAP_MODE)
1201 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1202 | NFS_INO_INVALID_ACCESS
1203 | NFS_INO_INVALID_ACL
1204 | NFS_INO_REVAL_FORCED);
1205
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001206 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1207 if (inode->i_uid != fattr->uid) {
1208 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1209 inode->i_uid = fattr->uid;
1210 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001211 } else if (server->caps & NFS_CAP_OWNER)
1212 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1213 | NFS_INO_INVALID_ACCESS
1214 | NFS_INO_INVALID_ACL
1215 | NFS_INO_REVAL_FORCED);
1216
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001217 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1218 if (inode->i_gid != fattr->gid) {
1219 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1220 inode->i_gid = fattr->gid;
1221 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001222 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1223 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1224 | NFS_INO_INVALID_ACCESS
1225 | NFS_INO_INVALID_ACL
1226 | NFS_INO_REVAL_FORCED);
Trond Myklebust921615f2008-10-14 19:23:07 -04001227
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001228 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1229 if (inode->i_nlink != fattr->nlink) {
1230 invalid |= NFS_INO_INVALID_ATTR;
1231 if (S_ISDIR(inode->i_mode))
1232 invalid |= NFS_INO_INVALID_DATA;
1233 inode->i_nlink = fattr->nlink;
1234 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001235 } else if (server->caps & NFS_CAP_NLINK)
1236 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1237 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001238
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001239 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 /*
1241 * report the blocks in 512byte units
1242 */
1243 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001245 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1246 inode->i_blocks = fattr->du.nfs2.blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247
1248 /* Update attrtimeo value if we're out of the unstable period */
1249 if (invalid & NFS_INO_INVALID_ATTR) {
Chuck Lever91d5b472006-03-20 13:44:14 -05001250 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001252 nfsi->attrtimeo_timestamp = now;
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001253 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001254 } else {
Peter Staubach64672d52008-12-23 15:21:56 -05001255 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001256 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1257 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1258 nfsi->attrtimeo_timestamp = now;
1259 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 }
Trond Myklebustf2115dc2007-08-15 12:49:17 -04001261 invalid &= ~NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 /* Don't invalidate the data if we were to blame */
1263 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1264 || S_ISLNK(inode->i_mode)))
1265 invalid &= ~NFS_INO_INVALID_DATA;
Trond Myklebust412c77c2007-07-03 16:10:55 -04001266 if (!nfs_have_delegation(inode, FMODE_READ) ||
Trond Myklebust62ab4602009-08-09 15:06:19 -04001267 (save_cache_validity & NFS_INO_REVAL_FORCED))
Chuck Lever55296802005-08-18 11:24:09 -07001268 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001269
1270 return 0;
1271 out_changed:
1272 /*
1273 * Big trouble! The inode has become a different object.
1274 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001276 __func__, inode->i_ino, inode->i_mode, fattr->mode);
Trond Myklebustb37b03b2005-11-25 17:10:06 -05001277 out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278 /*
1279 * No need to worry about unhashing the dentry, as the
1280 * lookup validation will know that the inode is bad.
1281 * (But we fall through to invalidate the caches.)
1282 */
1283 nfs_invalidate_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 return -ESTALE;
Chuck Lever325cfed2005-11-30 18:08:55 -05001285
1286 out_fileid:
1287 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1288 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
David Howells54ceac42006-08-22 20:06:13 -04001289 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
Chuck Lever325cfed2005-11-30 18:08:55 -05001290 (long long)nfsi->fileid, (long long)fattr->fileid);
1291 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292}
1293
Trond Myklebust55a97592006-06-09 09:34:19 -04001294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295#ifdef CONFIG_NFS_V4
1296
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297/*
1298 * Clean out any remaining NFSv4 state that might be left over due
1299 * to open() calls that passed nfs_atomic_lookup, but failed to call
1300 * nfs_open().
1301 */
David Howellsf7b422b2006-06-09 09:34:33 -04001302void nfs4_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304 /* If we are holding a delegation, return it! */
Trond Myklebuste6f81072008-01-24 18:14:34 -05001305 nfs_inode_return_delegation_noreclaim(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 /* First call standard NFS clear_inode() code */
1307 nfs_clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309#endif
1310
David Howellsf7b422b2006-06-09 09:34:33 -04001311struct inode *nfs_alloc_inode(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312{
1313 struct nfs_inode *nfsi;
Christoph Lametere94b1762006-12-06 20:33:17 -08001314 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 if (!nfsi)
1316 return NULL;
Chuck Lever55296802005-08-18 11:24:09 -07001317 nfsi->flags = 0UL;
1318 nfsi->cache_validity = 0UL;
Trond Myklebust458818e2005-06-22 17:16:27 +00001319#ifdef CONFIG_NFS_V3_ACL
1320 nfsi->acl_access = ERR_PTR(-EAGAIN);
1321 nfsi->acl_default = ERR_PTR(-EAGAIN);
1322#endif
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00001323#ifdef CONFIG_NFS_V4
1324 nfsi->nfs4_acl = NULL;
1325#endif /* CONFIG_NFS_V4 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 return &nfsi->vfs_inode;
1327}
1328
David Howellsf7b422b2006-06-09 09:34:33 -04001329void nfs_destroy_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330{
1331 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1332}
1333
Andrew Mortond75d5412006-06-25 02:41:26 -07001334static inline void nfs4_init_once(struct nfs_inode *nfsi)
1335{
1336#ifdef CONFIG_NFS_V4
1337 INIT_LIST_HEAD(&nfsi->open_states);
1338 nfsi->delegation = NULL;
1339 nfsi->delegation_state = 0;
1340 init_rwsem(&nfsi->rwsem);
1341#endif
1342}
David Howellsf7b422b2006-06-09 09:34:33 -04001343
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001344static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345{
1346 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1347
Christoph Lametera35afb82007-05-16 22:10:57 -07001348 inode_init_once(&nfsi->vfs_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -07001349 INIT_LIST_HEAD(&nfsi->open_files);
1350 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1351 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1352 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
Christoph Lametera35afb82007-05-16 22:10:57 -07001353 nfsi->npages = 0;
Trond Myklebustff778d02010-02-19 16:53:39 -08001354 nfsi->ncommit = 0;
Trond Myklebust565277f2007-10-15 18:17:53 -04001355 atomic_set(&nfsi->silly_count, 1);
1356 INIT_HLIST_HEAD(&nfsi->silly_list);
1357 init_waitqueue_head(&nfsi->waitqueue);
Christoph Lametera35afb82007-05-16 22:10:57 -07001358 nfs4_init_once(nfsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359}
Paul Mundt20c2df82007-07-20 10:11:58 +09001360
David Howellsf7b422b2006-06-09 09:34:33 -04001361static int __init nfs_init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362{
1363 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1364 sizeof(struct nfs_inode),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001365 0, (SLAB_RECLAIM_ACCOUNT|
1366 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001367 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 if (nfs_inode_cachep == NULL)
1369 return -ENOMEM;
1370
1371 return 0;
1372}
1373
David Brownell266bee82006-06-27 12:59:15 -07001374static void nfs_destroy_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001376 kmem_cache_destroy(nfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377}
1378
Trond Myklebust57460062008-02-19 20:04:22 -05001379struct workqueue_struct *nfsiod_workqueue;
1380
1381/*
1382 * start up the nfsiod workqueue
1383 */
1384static int nfsiod_start(void)
1385{
1386 struct workqueue_struct *wq;
1387 dprintk("RPC: creating workqueue nfsiod\n");
1388 wq = create_singlethread_workqueue("nfsiod");
1389 if (wq == NULL)
1390 return -ENOMEM;
1391 nfsiod_workqueue = wq;
1392 return 0;
1393}
1394
1395/*
1396 * Destroy the nfsiod workqueue
1397 */
1398static void nfsiod_stop(void)
1399{
1400 struct workqueue_struct *wq;
1401
1402 wq = nfsiod_workqueue;
1403 if (wq == NULL)
1404 return;
1405 nfsiod_workqueue = NULL;
1406 destroy_workqueue(wq);
1407}
1408
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409/*
1410 * Initialize NFS
1411 */
1412static int __init init_nfs_fs(void)
1413{
1414 int err;
1415
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001416 err = nfs_dns_resolver_init();
1417 if (err < 0)
1418 goto out8;
1419
David Howells8ec442a2009-04-03 16:42:42 +01001420 err = nfs_fscache_register();
1421 if (err < 0)
1422 goto out7;
1423
Trond Myklebust57460062008-02-19 20:04:22 -05001424 err = nfsiod_start();
1425 if (err)
1426 goto out6;
1427
David Howells6aaca562006-08-22 20:06:13 -04001428 err = nfs_fs_proc_init();
1429 if (err)
1430 goto out5;
1431
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 err = nfs_init_nfspagecache();
1433 if (err)
1434 goto out4;
1435
1436 err = nfs_init_inodecache();
1437 if (err)
1438 goto out3;
1439
1440 err = nfs_init_readpagecache();
1441 if (err)
1442 goto out2;
1443
1444 err = nfs_init_writepagecache();
1445 if (err)
1446 goto out1;
1447
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448 err = nfs_init_directcache();
1449 if (err)
1450 goto out0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451
1452#ifdef CONFIG_PROC_FS
1453 rpc_proc_register(&nfs_rpcstat);
1454#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001455 if ((err = register_nfs_fs()) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 goto out;
1457 return 0;
1458out:
1459#ifdef CONFIG_PROC_FS
1460 rpc_proc_unregister("nfs");
1461#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462 nfs_destroy_directcache();
Chuck Lever6b59a752005-11-30 18:08:19 -05001463out0:
Chuck Lever6b59a752005-11-30 18:08:19 -05001464 nfs_destroy_writepagecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465out1:
1466 nfs_destroy_readpagecache();
1467out2:
1468 nfs_destroy_inodecache();
1469out3:
1470 nfs_destroy_nfspagecache();
1471out4:
David Howells6aaca562006-08-22 20:06:13 -04001472 nfs_fs_proc_exit();
1473out5:
Trond Myklebust57460062008-02-19 20:04:22 -05001474 nfsiod_stop();
1475out6:
David Howells8ec442a2009-04-03 16:42:42 +01001476 nfs_fscache_unregister();
1477out7:
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001478 nfs_dns_resolver_destroy();
1479out8:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 return err;
1481}
1482
1483static void __exit exit_nfs_fs(void)
1484{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 nfs_destroy_directcache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486 nfs_destroy_writepagecache();
1487 nfs_destroy_readpagecache();
1488 nfs_destroy_inodecache();
1489 nfs_destroy_nfspagecache();
David Howells8ec442a2009-04-03 16:42:42 +01001490 nfs_fscache_unregister();
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001491 nfs_dns_resolver_destroy();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001492#ifdef CONFIG_PROC_FS
1493 rpc_proc_unregister("nfs");
1494#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001495 unregister_nfs_fs();
David Howells6aaca562006-08-22 20:06:13 -04001496 nfs_fs_proc_exit();
Trond Myklebust57460062008-02-19 20:04:22 -05001497 nfsiod_stop();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498}
1499
1500/* Not quite true; I just maintain it */
1501MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1502MODULE_LICENSE("GPL");
Trond Myklebustf43bf0b2007-10-09 12:01:04 -04001503module_param(enable_ino64, bool, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504
1505module_init(init_nfs_fs)
1506module_exit(exit_nfs_fs)