blob: faa091865ad05c956114ab7c7642994845717382 [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 -0400100int nfs_write_inode(struct inode *inode, int sync)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 int ret;
103
Trond Myklebustd30c8342006-12-13 15:23:47 -0500104 if (sync) {
105 ret = filemap_fdatawait(inode->i_mapping);
106 if (ret == 0)
107 ret = nfs_commit_inode(inode, FLUSH_SYNC);
108 } else
109 ret = nfs_commit_inode(inode, 0);
110 if (ret >= 0)
111 return 0;
112 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
113 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114}
115
David Howellsf7b422b2006-06-09 09:34:33 -0400116void nfs_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
Trond Myklebustda6d5032006-06-01 17:26:35 -0400118 /*
119 * The following should never happen...
120 */
121 BUG_ON(nfs_have_writebacks(inode));
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400122 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
Trond Myklebustada70d92005-06-22 17:16:22 +0000123 nfs_zap_acl_cache(inode);
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400124 nfs_access_zap_cache(inode);
David Howellsef79c092009-04-03 16:42:43 +0100125 nfs_fscache_release_inode_cookie(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126}
127
Trond Myklebust29884df2005-12-13 16:13:54 -0500128/**
129 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
130 */
131int nfs_sync_mapping(struct address_space *mapping)
132{
133 int ret;
134
135 if (mapping->nrpages == 0)
136 return 0;
137 unmap_mapping_range(mapping, 0, 0, 0);
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -0800138 ret = filemap_write_and_wait(mapping);
Trond Myklebust29884df2005-12-13 16:13:54 -0500139 if (ret != 0)
140 goto out;
141 ret = nfs_wb_all(mapping->host);
142out:
143 return ret;
144}
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146/*
147 * Invalidate the local caches
148 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500149static void nfs_zap_caches_locked(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
151 struct nfs_inode *nfsi = NFS_I(inode);
152 int mode = inode->i_mode;
153
Chuck Lever91d5b472006-03-20 13:44:14 -0500154 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
155
Trond Myklebustc7c20972007-09-28 19:22:40 -0400156 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
157 nfsi->attrtimeo_timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
160 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
Chuck Lever55296802005-08-18 11:24:09 -0700161 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 -0700162 else
Chuck Lever55296802005-08-18 11:24:09 -0700163 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 -0500164}
Chuck Leverdc592502005-08-18 11:24:12 -0700165
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500166void nfs_zap_caches(struct inode *inode)
167{
168 spin_lock(&inode->i_lock);
169 nfs_zap_caches_locked(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700170 spin_unlock(&inode->i_lock);
Trond Myklebustada70d92005-06-22 17:16:22 +0000171}
172
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700173void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
174{
175 if (mapping->nrpages != 0) {
176 spin_lock(&inode->i_lock);
177 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
178 spin_unlock(&inode->i_lock);
179 }
180}
181
Trond Myklebustf41f7412008-06-11 17:39:04 -0400182void nfs_zap_acl_cache(struct inode *inode)
Trond Myklebustada70d92005-06-22 17:16:22 +0000183{
184 void (*clear_acl_cache)(struct inode *);
185
186 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
187 if (clear_acl_cache != NULL)
188 clear_acl_cache(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700189 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700190 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700191 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
193
Trond Myklebustc4812992007-09-28 17:11:45 -0400194void nfs_invalidate_atime(struct inode *inode)
195{
196 spin_lock(&inode->i_lock);
197 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
198 spin_unlock(&inode->i_lock);
199}
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201/*
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500202 * Invalidate, but do not unhash, the inode.
203 * NB: must be called with inode->i_lock held!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500205static void nfs_invalidate_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Benny Halevy3a10c302008-01-23 08:58:59 +0200207 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500208 nfs_zap_caches_locked(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209}
210
211struct nfs_find_desc {
212 struct nfs_fh *fh;
213 struct nfs_fattr *fattr;
214};
215
216/*
217 * In NFSv3 we can have 64bit inode numbers. In order to support
218 * this, and re-exported directories (also seen in NFSv2)
219 * we are forced to allow 2 different inodes to have the same
220 * i_ino.
221 */
222static int
223nfs_find_actor(struct inode *inode, void *opaque)
224{
225 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
226 struct nfs_fh *fh = desc->fh;
227 struct nfs_fattr *fattr = desc->fattr;
228
229 if (NFS_FILEID(inode) != fattr->fileid)
230 return 0;
231 if (nfs_compare_fh(NFS_FH(inode), fh))
232 return 0;
233 if (is_bad_inode(inode) || NFS_STALE(inode))
234 return 0;
235 return 1;
236}
237
238static int
239nfs_init_locked(struct inode *inode, void *opaque)
240{
241 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
242 struct nfs_fattr *fattr = desc->fattr;
243
Benny Halevy99fadcd2008-01-23 08:59:08 +0200244 set_nfs_fileid(inode, fattr->fileid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 nfs_copy_fh(NFS_FH(inode), desc->fh);
246 return 0;
247}
248
249/* Don't use READDIRPLUS on directories that we believe are too large */
250#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
251
252/*
253 * This is our front-end to iget that looks up inodes by file handle
254 * instead of inode number.
255 */
256struct inode *
257nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
258{
259 struct nfs_find_desc desc = {
260 .fh = fh,
261 .fattr = fattr
262 };
Trond Myklebust03f28e32006-03-20 13:44:48 -0500263 struct inode *inode = ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 unsigned long hash;
265
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400266 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 goto out_no_inode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400268 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 goto out_no_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
271 hash = nfs_fattr_to_ino_t(fattr);
272
Trond Myklebust03f28e32006-03-20 13:44:48 -0500273 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
274 if (inode == NULL) {
275 inode = ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 goto out_no_inode;
Trond Myklebust03f28e32006-03-20 13:44:48 -0500277 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279 if (inode->i_state & I_NEW) {
280 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800281 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283 /* We set i_ino for the few things that still rely on it,
284 * such as stat(2) */
285 inode->i_ino = hash;
286
287 /* We can't support update_atime(), since the server will reset it */
288 inode->i_flags |= S_NOATIME|S_NOCMTIME;
289 inode->i_mode = fattr->mode;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400290 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
291 && nfs_server_capable(inode, NFS_CAP_MODE))
292 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
293 | NFS_INO_INVALID_ACCESS
294 | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 /* Why so? Because we want revalidate for devices/FIFOs, and
296 * that's precisely what we have in nfs_file_inode_operations.
297 */
David Howells8fa5c002006-08-22 20:06:12 -0400298 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 if (S_ISREG(inode->i_mode)) {
300 inode->i_fop = &nfs_file_operations;
301 inode->i_data.a_ops = &nfs_file_aops;
302 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
303 } else if (S_ISDIR(inode->i_mode)) {
David Howells8fa5c002006-08-22 20:06:12 -0400304 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 inode->i_fop = &nfs_dir_operations;
306 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
307 && fattr->size <= NFS_LIMIT_READDIRPLUS)
Benny Halevy3a10c302008-01-23 08:58:59 +0200308 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400309 /* Deal with crossing mountpoints */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400310 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
311 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
Manoj Naik6b97fd32006-06-09 09:34:29 -0400312 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
313 inode->i_op = &nfs_referral_inode_operations;
314 else
315 inode->i_op = &nfs_mountpoint_inode_operations;
Trond Myklebust55a97592006-06-09 09:34:19 -0400316 inode->i_fop = NULL;
Trond Myklebustc37dcd332008-03-06 12:34:50 -0500317 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400318 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 } else if (S_ISLNK(inode->i_mode))
320 inode->i_op = &nfs_symlink_inode_operations;
321 else
322 init_special_inode(inode, inode->i_mode, fattr->rdev);
323
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400324 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
325 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
326 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
327 nfsi->change_attr = 0;
328 inode->i_size = 0;
329 inode->i_nlink = 0;
330 inode->i_uid = -2;
331 inode->i_gid = -2;
332 inode->i_blocks = 0;
333 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
334
Trond Myklebust33801142005-10-27 22:12:39 -0400335 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400336 nfsi->attr_gencount = fattr->gencount;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400337 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
338 inode->i_atime = fattr->atime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400339 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
340 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400341 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
342 inode->i_mtime = fattr->mtime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400343 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
344 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400346 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
347 inode->i_ctime = fattr->ctime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400348 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
349 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
350 | NFS_INO_INVALID_ACCESS
351 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400352 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 nfsi->change_attr = fattr->change_attr;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400354 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
355 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
356 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400357 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
358 inode->i_size = nfs_size_to_loff_t(fattr->size);
Trond Myklebust62ab4602009-08-09 15:06:19 -0400359 else
360 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
361 | NFS_INO_INVALID_DATA
362 | NFS_INO_REVAL_PAGECACHE;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400363 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
364 inode->i_nlink = fattr->nlink;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400365 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
366 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400367 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
368 inode->i_uid = fattr->uid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400369 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
370 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
371 | NFS_INO_INVALID_ACCESS
372 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400373 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
374 inode->i_gid = fattr->gid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400375 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
376 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
377 | NFS_INO_INVALID_ACCESS
378 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400379 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
380 inode->i_blocks = fattr->du.nfs2.blocks;
381 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 /*
383 * report the blocks in 512byte units
384 */
385 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 }
387 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800388 nfsi->attrtimeo_timestamp = now;
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400389 nfsi->access_cache = RB_ROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
David Howellsef79c092009-04-03 16:42:43 +0100391 nfs_fscache_init_inode_cookie(inode);
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 unlock_new_inode(inode);
394 } else
395 nfs_refresh_inode(inode, fattr);
396 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
397 inode->i_sb->s_id,
398 (long long)NFS_FILEID(inode),
399 atomic_read(&inode->i_count));
400
401out:
402 return inode;
403
404out_no_inode:
Trond Myklebust03f28e32006-03-20 13:44:48 -0500405 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 goto out;
407}
408
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400409#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 -0700410
411int
412nfs_setattr(struct dentry *dentry, struct iattr *attr)
413{
414 struct inode *inode = dentry->d_inode;
415 struct nfs_fattr fattr;
416 int error;
417
Chuck Lever91d5b472006-03-20 13:44:14 -0500418 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
419
Jeff Layton188b95d2007-10-18 03:05:21 -0700420 /* skip mode change if it's just for clearing setuid/setgid */
421 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
422 attr->ia_valid &= ~ATTR_MODE;
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 if (attr->ia_valid & ATTR_SIZE) {
425 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
426 attr->ia_valid &= ~ATTR_SIZE;
427 }
428
429 /* Optimization: if the end result is no change, don't RPC */
430 attr->ia_valid &= NFS_VALID_ATTRS;
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400431 if ((attr->ia_valid & ~ATTR_FILE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 return 0;
433
Trond Myklebust755c1e22006-03-20 13:44:06 -0500434 /* Write all dirty data */
Trond Myklebuste1552e12007-04-14 19:07:28 -0400435 if (S_ISREG(inode->i_mode)) {
436 filemap_write_and_wait(inode->i_mapping);
437 nfs_wb_all(inode);
438 }
Trond Myklebust642ac542005-10-18 14:20:19 -0700439 /*
440 * Return any delegations if we're going to change ACLs
441 */
442 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
443 nfs_inode_return_delegation(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400445 if (error == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 nfs_refresh_inode(inode, &fattr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400447 return error;
448}
449
450/**
Trond Myklebusta3d01452008-06-11 12:21:19 -0400451 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
452 * @inode: inode of the file used
453 * @offset: file offset to start truncating
454 *
455 * This is a copy of the common vmtruncate, but with the locking
456 * corrected to take into account the fact that NFS requires
457 * inode->i_size to be updated under the inode->i_lock.
458 */
459static int nfs_vmtruncate(struct inode * inode, loff_t offset)
460{
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000461 loff_t oldsize;
462 int err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400463
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000464 err = inode_newsize_ok(inode, offset);
465 if (err)
466 goto out;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400467
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000468 spin_lock(&inode->i_lock);
469 oldsize = inode->i_size;
470 i_size_write(inode, offset);
471 spin_unlock(&inode->i_lock);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400472
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000473 truncate_pagecache(inode, oldsize, offset);
474out:
475 return err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400476}
477
478/**
Trond Myklebust65e43082005-08-16 11:49:44 -0400479 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
480 * @inode: pointer to struct inode
481 * @attr: pointer to struct iattr
482 *
483 * Note: we do this in the *proc.c in order to ensure that
484 * it works for things like exclusive creates too.
485 */
486void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
487{
488 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
Trond Myklebust2f28ea62008-10-05 14:26:11 -0400489 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 if ((attr->ia_valid & ATTR_MODE) != 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -0400491 int mode = attr->ia_mode & S_IALLUGO;
492 mode |= inode->i_mode & ~S_IALLUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 inode->i_mode = mode;
494 }
495 if ((attr->ia_valid & ATTR_UID) != 0)
496 inode->i_uid = attr->ia_uid;
497 if ((attr->ia_valid & ATTR_GID) != 0)
498 inode->i_gid = attr->ia_gid;
Chuck Lever55296802005-08-18 11:24:09 -0700499 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700500 spin_unlock(&inode->i_lock);
Trond Myklebust65e43082005-08-16 11:49:44 -0400501 }
502 if ((attr->ia_valid & ATTR_SIZE) != 0) {
Chuck Lever91d5b472006-03-20 13:44:14 -0500503 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400504 nfs_vmtruncate(inode, attr->ia_size);
Trond Myklebust65e43082005-08-16 11:49:44 -0400505 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506}
507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
509{
510 struct inode *inode = dentry->d_inode;
Chuck Lever55296802005-08-18 11:24:09 -0700511 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 int err;
513
Chuck Lever28c494c2007-10-26 13:32:13 -0400514 /*
515 * Flush out writes to the server in order to update c/mtime.
516 *
517 * Hold the i_mutex to suspend application writes temporarily;
518 * this prevents long-running writing applications from blocking
519 * nfs_wb_nocommit.
520 */
521 if (S_ISREG(inode->i_mode)) {
522 mutex_lock(&inode->i_mutex);
Trond Myklebusted90ef52007-07-20 13:13:28 -0400523 nfs_wb_nocommit(inode);
Chuck Lever28c494c2007-10-26 13:32:13 -0400524 mutex_unlock(&inode->i_mutex);
525 }
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800526
527 /*
528 * We may force a getattr if the user cares about atime.
529 *
530 * Note that we only have to check the vfsmount flags here:
531 * - NFS always sets S_NOATIME by so checking it would give a
532 * bogus result
533 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
534 * no point in checking those.
535 */
536 if ((mnt->mnt_flags & MNT_NOATIME) ||
537 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 need_atime = 0;
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 if (need_atime)
541 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
542 else
543 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
Peter Staubach4e769b92007-08-03 15:07:10 -0400544 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 generic_fillattr(inode, stat);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400546 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
Peter Staubach4e769b92007-08-03 15:07:10 -0400547 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 return err;
549}
550
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400551/**
552 * nfs_close_context - Common close_context() routine NFSv2/v3
553 * @ctx: pointer to context
554 * @is_sync: is this a synchronous close
555 *
556 * always ensure that the attributes are up to date if we're mounted
557 * with close-to-open semantics
558 */
559void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
560{
561 struct inode *inode;
562 struct nfs_server *server;
563
564 if (!(ctx->mode & FMODE_WRITE))
565 return;
566 if (!is_sync)
567 return;
568 inode = ctx->path.dentry->d_inode;
569 if (!list_empty(&NFS_I(inode)->open_files))
570 return;
571 server = NFS_SERVER(inode);
572 if (server->flags & NFS_MOUNT_NOCTO)
573 return;
574 nfs_revalidate_inode(server, inode);
575}
576
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500577static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578{
579 struct nfs_open_context *ctx;
580
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700581 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 if (ctx != NULL) {
Trond Myklebust88be9f92007-06-05 10:42:27 -0400583 ctx->path.dentry = dget(dentry);
584 ctx->path.mnt = mntget(mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 ctx->cred = get_rpccred(cred);
586 ctx->state = NULL;
587 ctx->lockowner = current->files;
Jeff Layton66d3aac2008-03-31 15:01:58 -0400588 ctx->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 ctx->error = 0;
Olivier Galibert00a92642005-06-22 17:16:29 +0000590 ctx->dir_cookie = 0;
Trond Myklebust5e119342007-07-26 12:06:17 -0400591 atomic_set(&ctx->count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 }
593 return ctx;
594}
595
596struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
597{
598 if (ctx != NULL)
Trond Myklebust5e119342007-07-26 12:06:17 -0400599 atomic_inc(&ctx->count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 return ctx;
601}
602
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400603static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400604{
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400605 struct inode *inode = ctx->path.dentry->d_inode;
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400606
Trond Myklebust5e119342007-07-26 12:06:17 -0400607 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
608 return;
609 list_del(&ctx->list);
610 spin_unlock(&inode->i_lock);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400611 NFS_PROTO(inode)->close_context(ctx, is_sync);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400612 if (ctx->cred != NULL)
613 put_rpccred(ctx->cred);
Jan Blunck31f31db12008-05-02 13:42:45 -0700614 path_put(&ctx->path);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400615 kfree(ctx);
616}
617
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400618void put_nfs_open_context(struct nfs_open_context *ctx)
619{
620 __put_nfs_open_context(ctx, 0);
621}
622
623static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
624{
625 __put_nfs_open_context(ctx, 1);
626}
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628/*
629 * Ensure that mmap has a recent RPC credential for use when writing out
630 * shared pages
631 */
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500632static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800634 struct inode *inode = filp->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635 struct nfs_inode *nfsi = NFS_I(inode);
636
637 filp->private_data = get_nfs_open_context(ctx);
638 spin_lock(&inode->i_lock);
639 list_add(&ctx->list, &nfsi->open_files);
640 spin_unlock(&inode->i_lock);
641}
642
Trond Myklebustd5308382005-11-04 15:33:38 -0500643/*
644 * Given an inode, search for an open context with the desired characteristics
645 */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500646struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647{
648 struct nfs_inode *nfsi = NFS_I(inode);
649 struct nfs_open_context *pos, *ctx = NULL;
650
651 spin_lock(&inode->i_lock);
652 list_for_each_entry(pos, &nfsi->open_files, list) {
Trond Myklebustd5308382005-11-04 15:33:38 -0500653 if (cred != NULL && pos->cred != cred)
654 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 if ((pos->mode & mode) == mode) {
656 ctx = get_nfs_open_context(pos);
657 break;
658 }
659 }
660 spin_unlock(&inode->i_lock);
661 return ctx;
662}
663
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500664static void nfs_file_clear_open_context(struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800666 struct inode *inode = filp->f_path.dentry->d_inode;
Trond Myklebustcd3758e2007-08-10 17:44:32 -0400667 struct nfs_open_context *ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669 if (ctx) {
670 filp->private_data = NULL;
671 spin_lock(&inode->i_lock);
672 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
673 spin_unlock(&inode->i_lock);
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400674 put_nfs_open_context_sync(ctx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 }
676}
677
678/*
679 * These allocate and release file read/write context information.
680 */
681int nfs_open(struct inode *inode, struct file *filp)
682{
683 struct nfs_open_context *ctx;
684 struct rpc_cred *cred;
685
Trond Myklebust98a8e322008-03-12 12:25:28 -0400686 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 if (IS_ERR(cred))
688 return PTR_ERR(cred);
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800689 ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 put_rpccred(cred);
691 if (ctx == NULL)
692 return -ENOMEM;
693 ctx->mode = filp->f_mode;
694 nfs_file_set_open_context(filp, ctx);
695 put_nfs_open_context(ctx);
David Howellsef79c092009-04-03 16:42:43 +0100696 nfs_fscache_set_inode_cookie(inode, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 return 0;
698}
699
700int nfs_release(struct inode *inode, struct file *filp)
701{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 nfs_file_clear_open_context(filp);
703 return 0;
704}
705
706/*
707 * This function is called whenever some part of NFS notices that
708 * the cached attributes have to be refreshed.
709 */
710int
711__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
712{
713 int status = -ESTALE;
714 struct nfs_fattr fattr;
715 struct nfs_inode *nfsi = NFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
718 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
719
Chuck Lever85233a72006-10-19 23:28:42 -0700720 if (is_bad_inode(inode))
Chuck Lever412d5822005-08-18 11:24:11 -0700721 goto out;
Trond Myklebust7fdc49c2007-09-28 19:11:33 -0400722 if (NFS_STALE(inode))
723 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724
Trond Myklebust691beb12008-10-05 14:48:22 -0400725 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
727 if (status != 0) {
728 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
729 inode->i_sb->s_id,
730 (long long)NFS_FILEID(inode), status);
731 if (status == -ESTALE) {
732 nfs_zap_caches(inode);
733 if (!S_ISDIR(inode->i_mode))
Benny Halevy3a10c302008-01-23 08:58:59 +0200734 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 }
736 goto out;
737 }
738
Trond Myklebust4dc05ef2008-09-23 17:28:42 -0400739 status = nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 if (status) {
741 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
742 inode->i_sb->s_id,
743 (long long)NFS_FILEID(inode), status);
744 goto out;
745 }
Chuck Lever55296802005-08-18 11:24:09 -0700746
Trond Myklebust24aa1fe2005-12-03 15:20:07 -0500747 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
Trond Myklebustada70d92005-06-22 17:16:22 +0000748 nfs_zap_acl_cache(inode);
Chuck Lever55296802005-08-18 11:24:09 -0700749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
751 inode->i_sb->s_id,
752 (long long)NFS_FILEID(inode));
753
Chuck Lever412d5822005-08-18 11:24:11 -0700754 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 return status;
756}
757
758int nfs_attribute_timeout(struct inode *inode)
759{
760 struct nfs_inode *nfsi = NFS_I(inode);
761
762 if (nfs_have_delegation(inode, FMODE_READ))
763 return 0;
Peter Staubach64672d52008-12-23 15:21:56 -0500764 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765}
766
767/**
768 * nfs_revalidate_inode - Revalidate the inode attributes
769 * @server - pointer to nfs_server struct
770 * @inode - pointer to inode struct
771 *
772 * Updates inode attribute information by retrieving the data from the server.
773 */
774int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
775{
Trond Myklebust44b11872006-05-25 01:40:59 -0400776 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 && !nfs_attribute_timeout(inode))
778 return NFS_STALE(inode) ? -ESTALE : 0;
779 return __nfs_revalidate_inode(server, inode);
780}
781
Trond Myklebust717d44e2007-01-24 11:54:55 -0800782static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
783{
784 struct nfs_inode *nfsi = NFS_I(inode);
785
786 if (mapping->nrpages != 0) {
787 int ret = invalidate_inode_pages2(mapping);
788 if (ret < 0)
789 return ret;
790 }
791 spin_lock(&inode->i_lock);
792 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
Trond Myklebust2f78e432007-09-30 15:31:19 -0400793 if (S_ISDIR(inode->i_mode))
Trond Myklebust717d44e2007-01-24 11:54:55 -0800794 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
Trond Myklebust717d44e2007-01-24 11:54:55 -0800795 spin_unlock(&inode->i_lock);
796 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
David Howellsef79c092009-04-03 16:42:43 +0100797 nfs_fscache_reset_inode_cookie(inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800798 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
799 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
800 return 0;
801}
802
803static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
804{
805 int ret = 0;
806
807 mutex_lock(&inode->i_mutex);
808 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
809 ret = nfs_sync_mapping(mapping);
810 if (ret == 0)
811 ret = nfs_invalidate_mapping_nolock(inode, mapping);
812 }
813 mutex_unlock(&inode->i_mutex);
814 return ret;
815}
816
817/**
818 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
819 * @inode - pointer to host inode
820 * @mapping - pointer to mapping
821 */
822int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
823{
824 struct nfs_inode *nfsi = NFS_I(inode);
825 int ret = 0;
826
827 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
828 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
829 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
830 if (ret < 0)
831 goto out;
832 }
833 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
834 ret = nfs_invalidate_mapping_nolock(inode, mapping);
835out:
836 return ret;
837}
838
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839/**
Trond Myklebust7d52e862005-06-22 17:16:30 +0000840 * nfs_revalidate_mapping - Revalidate the pagecache
841 * @inode - pointer to host inode
842 * @mapping - pointer to mapping
Trond Myklebust717d44e2007-01-24 11:54:55 -0800843 *
844 * This version of the function will take the inode->i_mutex and attempt to
845 * flush out all dirty data if it needs to invalidate the page cache.
Trond Myklebust7d52e862005-06-22 17:16:30 +0000846 */
Trond Myklebust44b11872006-05-25 01:40:59 -0400847int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust7d52e862005-06-22 17:16:30 +0000848{
849 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust44b11872006-05-25 01:40:59 -0400850 int ret = 0;
851
Trond Myklebust44b11872006-05-25 01:40:59 -0400852 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800853 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
Trond Myklebust44b11872006-05-25 01:40:59 -0400854 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800855 if (ret < 0)
856 goto out;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000857 }
Trond Myklebust717d44e2007-01-24 11:54:55 -0800858 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
859 ret = nfs_invalidate_mapping(inode, mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700860out:
Trond Myklebust44b11872006-05-25 01:40:59 -0400861 return ret;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000862}
863
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100864static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
865{
866 struct nfs_inode *nfsi = NFS_I(inode);
867
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400868 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
869 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
870 && nfsi->change_attr == fattr->pre_change_attr) {
Trond Myklebust70ca8852007-09-30 15:21:24 -0400871 nfsi->change_attr = fattr->change_attr;
872 if (S_ISDIR(inode->i_mode))
873 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
874 }
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100875 /* If we have atomic WCC data, we may update some attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400876 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
877 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
878 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100879 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400880
881 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
882 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
883 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100884 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebuste323ea42007-09-30 17:03:25 -0400885 if (S_ISDIR(inode->i_mode))
886 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100887 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400888 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
889 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
890 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
891 && nfsi->npages == 0)
892 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100893}
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895/**
Trond Myklebust33801142005-10-27 22:12:39 -0400896 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 * @inode - pointer to inode
898 * @fattr - updated attributes
899 *
900 * Verifies the attribute cache. If we have just changed the attributes,
901 * so that fattr carries weak cache consistency data, then it may
902 * also update the ctime/mtime/change_attribute.
903 */
Trond Myklebust33801142005-10-27 22:12:39 -0400904static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905{
906 struct nfs_inode *nfsi = NFS_I(inode);
907 loff_t cur_size, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400908 unsigned long invalid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909
Chuck Leverdc592502005-08-18 11:24:12 -0700910
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 /* Has the inode gone and changed behind our back? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400912 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 return -EIO;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400914 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
915 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400917 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
Trond Myklebustf1bb0b92006-05-25 01:40:55 -0400918 nfsi->change_attr != fattr->change_attr)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400919 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 /* Verify a few of the more important attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400922 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400923 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Trond Myklebustca62b9c2006-03-20 13:44:07 -0500924
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400925 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
926 cur_size = i_size_read(inode);
927 new_isize = nfs_size_to_loff_t(fattr->size);
928 if (cur_size != new_isize && nfsi->npages == 0)
929 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
930 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
932 /* Have any file permissions changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400933 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
934 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
935 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
936 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
937 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400938 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
940 /* Has the link count changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400941 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400942 invalid |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400944 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400945 invalid |= NFS_INO_INVALID_ATIME;
946
947 if (invalid != 0)
948 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949
Trond Myklebust33801142005-10-27 22:12:39 -0400950 nfsi->read_cache_jiffies = fattr->time_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 return 0;
952}
953
Trond Myklebusta10ad172008-09-23 17:28:41 -0400954static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
955{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400956 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
957 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400958 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
959}
960
961static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
962{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400963 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
964 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400965 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
966}
967
Trond Myklebustae05f262008-10-28 15:21:40 -0400968static atomic_long_t nfs_attr_generation_counter;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400969
970static unsigned long nfs_read_attr_generation_counter(void)
971{
Trond Myklebustae05f262008-10-28 15:21:40 -0400972 return atomic_long_read(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400973}
974
975unsigned long nfs_inc_attr_generation_counter(void)
976{
Trond Myklebustae05f262008-10-28 15:21:40 -0400977 return atomic_long_inc_return(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400978}
979
980void nfs_fattr_init(struct nfs_fattr *fattr)
981{
982 fattr->valid = 0;
983 fattr->time_start = jiffies;
984 fattr->gencount = nfs_inc_attr_generation_counter();
985}
986
Trond Myklebusta10ad172008-09-23 17:28:41 -0400987/**
988 * nfs_inode_attrs_need_update - check if the inode attributes need updating
989 * @inode - pointer to inode
990 * @fattr - attributes
991 *
992 * Attempt to divine whether or not an RPC call reply carrying stale
993 * attributes got scheduled after another call carrying updated ones.
994 *
995 * To do so, the function first assumes that a more recent ctime means
996 * that the attributes in fattr are newer, however it also attempt to
997 * catch the case where ctime either didn't change, or went backwards
998 * (if someone reset the clock on the server) by looking at whether
999 * or not this RPC call was started after the inode was last updated.
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001000 * Note also the check for wraparound of 'attr_gencount'
Trond Myklebusta10ad172008-09-23 17:28:41 -04001001 *
1002 * The function returns 'true' if it thinks the attributes in 'fattr' are
1003 * more recent than the ones cached in the inode.
1004 *
1005 */
1006static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1007{
1008 const struct nfs_inode *nfsi = NFS_I(inode);
1009
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001010 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
Trond Myklebust03254e62008-10-09 13:27:55 -04001011 nfs_ctime_need_update(inode, fattr) ||
1012 nfs_size_need_update(inode, fattr) ||
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001013 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
Trond Myklebusta10ad172008-09-23 17:28:41 -04001014}
1015
Trond Myklebust870a5be2008-10-05 12:07:23 -04001016static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1017{
Trond Myklebusta10ad172008-09-23 17:28:41 -04001018 if (nfs_inode_attrs_need_update(inode, fattr))
Trond Myklebust870a5be2008-10-05 12:07:23 -04001019 return nfs_update_inode(inode, fattr);
1020 return nfs_check_inode_attributes(inode, fattr);
1021}
1022
Trond Myklebust33801142005-10-27 22:12:39 -04001023/**
1024 * nfs_refresh_inode - try to update the inode attribute cache
1025 * @inode - pointer to inode
1026 * @fattr - updated attributes
1027 *
1028 * Check that an RPC call that returned attributes has not overlapped with
1029 * other recent updates of the inode metadata, then decide whether it is
1030 * safe to do a full update of the inode attributes, or whether just to
1031 * call nfs_check_inode_attributes.
1032 */
1033int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1034{
Trond Myklebust33801142005-10-27 22:12:39 -04001035 int status;
1036
1037 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1038 return 0;
1039 spin_lock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001040 status = nfs_refresh_inode_locked(inode, fattr);
Trond Myklebust33801142005-10-27 22:12:39 -04001041 spin_unlock(&inode->i_lock);
David Howellsef79c092009-04-03 16:42:43 +01001042
Trond Myklebust33801142005-10-27 22:12:39 -04001043 return status;
1044}
1045
Trond Myklebustd65f5572008-10-05 12:27:55 -04001046static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1047{
1048 struct nfs_inode *nfsi = NFS_I(inode);
1049
1050 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1051 if (S_ISDIR(inode->i_mode))
1052 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1053 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1054 return 0;
1055 return nfs_refresh_inode_locked(inode, fattr);
1056}
1057
Trond Myklebustdecf4912005-10-27 22:12:39 -04001058/**
1059 * nfs_post_op_update_inode - try to update the inode attribute cache
1060 * @inode - pointer to inode
1061 * @fattr - updated attributes
1062 *
1063 * After an operation that has changed the inode metadata, mark the
1064 * attribute cache as being invalid, then try to update it.
Chuck Leverf551e442006-09-20 14:33:04 -04001065 *
1066 * NB: if the server didn't return any post op attributes, this
1067 * function will force the retrieval of attributes before the next
1068 * NFS request. Thus it should be used only for operations that
1069 * are expected to change one or more attributes, to avoid
1070 * unnecessary NFS requests and trips through nfs_update_inode().
Trond Myklebustdecf4912005-10-27 22:12:39 -04001071 */
1072int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1073{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001074 int status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001075
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001076 spin_lock(&inode->i_lock);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001077 status = nfs_post_op_update_inode_locked(inode, fattr);
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001078 spin_unlock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001079 return status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001080}
1081
Trond Myklebust70ca8852007-09-30 15:21:24 -04001082/**
1083 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1084 * @inode - pointer to inode
1085 * @fattr - updated attributes
1086 *
1087 * After an operation that has changed the inode metadata, mark the
1088 * attribute cache as being invalid, then try to update it. Fake up
1089 * weak cache consistency data, if none exist.
1090 *
1091 * This function is mainly designed to be used by the ->write_done() functions.
1092 */
1093int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1094{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001095 int status;
1096
1097 spin_lock(&inode->i_lock);
1098 /* Don't do a WCC update if these attributes are already stale */
1099 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1100 !nfs_inode_attrs_need_update(inode, fattr)) {
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001101 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1102 | NFS_ATTR_FATTR_PRESIZE
1103 | NFS_ATTR_FATTR_PREMTIME
1104 | NFS_ATTR_FATTR_PRECTIME);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001105 goto out_noforce;
1106 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001107 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1108 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001109 fattr->pre_change_attr = NFS_I(inode)->change_attr;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001110 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001111 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001112 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1113 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001114 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001115 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1116 }
1117 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1118 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001119 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001120 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1121 }
1122 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1123 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
Trond Myklebusta3d01452008-06-11 12:21:19 -04001124 fattr->pre_size = i_size_read(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001125 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001126 }
Trond Myklebustd65f5572008-10-05 12:27:55 -04001127out_noforce:
1128 status = nfs_post_op_update_inode_locked(inode, fattr);
1129 spin_unlock(&inode->i_lock);
1130 return status;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001131}
1132
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133/*
1134 * Many nfs protocol calls return the new file attributes after
1135 * an operation. Here we update the inode to reflect the state
1136 * of the server's inode.
1137 *
1138 * This is a bit tricky because we have to make sure all dirty pages
1139 * have been sent off to the server before calling invalidate_inode_pages.
1140 * To make sure no other process adds more write requests while we try
1141 * our best to flush them, we make them sleep during the attribute refresh.
1142 *
1143 * A very similar scenario holds for the dir cache.
1144 */
Trond Myklebust24aa1fe2005-12-03 15:20:07 -05001145static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146{
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001147 struct nfs_server *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001149 loff_t cur_isize, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -04001150 unsigned long invalid = 0;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001151 unsigned long now = jiffies;
Trond Myklebust62ab4602009-08-09 15:06:19 -04001152 unsigned long save_cache_validity;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153
1154 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001155 __func__, inode->i_sb->s_id, inode->i_ino,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 atomic_read(&inode->i_count), fattr->valid);
1157
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001158 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Chuck Lever325cfed2005-11-30 18:08:55 -05001159 goto out_fileid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160
1161 /*
1162 * Make sure the inode's type hasn't changed.
1163 */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001164 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 goto out_changed;
1166
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001167 server = NFS_SERVER(inode);
Trond Myklebusta0356862007-06-05 13:26:15 -04001168 /* Update the fsid? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001169 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Trond Myklebustc37dcd332008-03-06 12:34:50 -05001170 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1171 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001172 server->fsid = fattr->fsid;
1173
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174 /*
1175 * Update the read time so we don't revalidate too often.
1176 */
Trond Myklebust33801142005-10-27 22:12:39 -04001177 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001178
Trond Myklebust62ab4602009-08-09 15:06:19 -04001179 save_cache_validity = nfsi->cache_validity;
1180 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1181 | NFS_INO_INVALID_ATIME
1182 | NFS_INO_REVAL_FORCED
1183 | NFS_INO_REVAL_PAGECACHE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184
Trond Myklebusta895b4a2006-01-03 09:55:40 +01001185 /* Do atomic weak cache consistency updates */
1186 nfs_wcc_update_inode(inode, fattr);
1187
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001188 /* More cache consistency checks */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001189 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1190 if (nfsi->change_attr != fattr->change_attr) {
1191 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1192 inode->i_sb->s_id, inode->i_ino);
1193 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1194 if (S_ISDIR(inode->i_mode))
1195 nfs_force_lookup_revalidate(inode);
1196 nfsi->change_attr = fattr->change_attr;
1197 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001198 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1199 invalid |= save_cache_validity;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001200
1201 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001202 /* NFSv2/v3: Check if the mtime agrees */
1203 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1204 dprintk("NFS: mtime change on server for file %s/%ld\n",
1205 inode->i_sb->s_id, inode->i_ino);
1206 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebustbfc69a42007-10-15 18:18:29 -04001207 if (S_ISDIR(inode->i_mode))
1208 nfs_force_lookup_revalidate(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001209 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001210 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001211 } else if (server->caps & NFS_CAP_MTIME)
1212 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1213 | NFS_INO_INVALID_DATA
1214 | NFS_INO_REVAL_PAGECACHE
1215 | NFS_INO_REVAL_FORCED);
1216
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001217 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001218 /* If ctime has changed we should definitely clear access+acl caches */
NeilBrown37d9d762009-03-11 14:10:23 -04001219 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001220 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
NeilBrown37d9d762009-03-11 14:10:23 -04001221 /* and probably clear data for a directory too as utimes can cause
1222 * havoc with our cache.
1223 */
1224 if (S_ISDIR(inode->i_mode)) {
1225 invalid |= NFS_INO_INVALID_DATA;
1226 nfs_force_lookup_revalidate(inode);
1227 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001228 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
NeilBrown37d9d762009-03-11 14:10:23 -04001229 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001230 } else if (server->caps & NFS_CAP_CTIME)
1231 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1232 | NFS_INO_INVALID_ACCESS
1233 | NFS_INO_INVALID_ACL
1234 | NFS_INO_REVAL_FORCED);
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001235
Trond Myklebust951a1432005-06-22 17:16:30 +00001236 /* Check if our cached file size is stale */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001237 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1238 new_isize = nfs_size_to_loff_t(fattr->size);
1239 cur_isize = i_size_read(inode);
1240 if (new_isize != cur_isize) {
1241 /* Do we perhaps have any outstanding writes, or has
1242 * the file grown beyond our last write? */
1243 if (nfsi->npages == 0 || new_isize > cur_isize) {
1244 i_size_write(inode, new_isize);
1245 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1246 }
1247 dprintk("NFS: isize change on server for file %s/%ld\n",
1248 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001250 } else
1251 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1252 | NFS_INO_REVAL_PAGECACHE
1253 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001256 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1257 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
Trond Myklebust62ab4602009-08-09 15:06:19 -04001258 else if (server->caps & NFS_CAP_ATIME)
1259 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1260 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001262 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1263 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1264 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1265 inode->i_mode = fattr->mode;
1266 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001267 } else if (server->caps & NFS_CAP_MODE)
1268 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1269 | NFS_INO_INVALID_ACCESS
1270 | NFS_INO_INVALID_ACL
1271 | NFS_INO_REVAL_FORCED);
1272
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001273 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1274 if (inode->i_uid != fattr->uid) {
1275 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1276 inode->i_uid = fattr->uid;
1277 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001278 } else if (server->caps & NFS_CAP_OWNER)
1279 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1280 | NFS_INO_INVALID_ACCESS
1281 | NFS_INO_INVALID_ACL
1282 | NFS_INO_REVAL_FORCED);
1283
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001284 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1285 if (inode->i_gid != fattr->gid) {
1286 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1287 inode->i_gid = fattr->gid;
1288 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001289 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1290 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1291 | NFS_INO_INVALID_ACCESS
1292 | NFS_INO_INVALID_ACL
1293 | NFS_INO_REVAL_FORCED);
Trond Myklebust921615f2008-10-14 19:23:07 -04001294
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001295 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1296 if (inode->i_nlink != fattr->nlink) {
1297 invalid |= NFS_INO_INVALID_ATTR;
1298 if (S_ISDIR(inode->i_mode))
1299 invalid |= NFS_INO_INVALID_DATA;
1300 inode->i_nlink = fattr->nlink;
1301 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001302 } else if (server->caps & NFS_CAP_NLINK)
1303 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1304 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001306 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001307 /*
1308 * report the blocks in 512byte units
1309 */
1310 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001312 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1313 inode->i_blocks = fattr->du.nfs2.blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001314
1315 /* Update attrtimeo value if we're out of the unstable period */
1316 if (invalid & NFS_INO_INVALID_ATTR) {
Chuck Lever91d5b472006-03-20 13:44:14 -05001317 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001319 nfsi->attrtimeo_timestamp = now;
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001320 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001321 } else {
Peter Staubach64672d52008-12-23 15:21:56 -05001322 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001323 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1324 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1325 nfsi->attrtimeo_timestamp = now;
1326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 }
Trond Myklebustf2115dc2007-08-15 12:49:17 -04001328 invalid &= ~NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 /* Don't invalidate the data if we were to blame */
1330 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1331 || S_ISLNK(inode->i_mode)))
1332 invalid &= ~NFS_INO_INVALID_DATA;
Trond Myklebust412c77c2007-07-03 16:10:55 -04001333 if (!nfs_have_delegation(inode, FMODE_READ) ||
Trond Myklebust62ab4602009-08-09 15:06:19 -04001334 (save_cache_validity & NFS_INO_REVAL_FORCED))
Chuck Lever55296802005-08-18 11:24:09 -07001335 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
1337 return 0;
1338 out_changed:
1339 /*
1340 * Big trouble! The inode has become a different object.
1341 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001343 __func__, inode->i_ino, inode->i_mode, fattr->mode);
Trond Myklebustb37b03b2005-11-25 17:10:06 -05001344 out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 /*
1346 * No need to worry about unhashing the dentry, as the
1347 * lookup validation will know that the inode is bad.
1348 * (But we fall through to invalidate the caches.)
1349 */
1350 nfs_invalidate_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 return -ESTALE;
Chuck Lever325cfed2005-11-30 18:08:55 -05001352
1353 out_fileid:
1354 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1355 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
David Howells54ceac42006-08-22 20:06:13 -04001356 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
Chuck Lever325cfed2005-11-30 18:08:55 -05001357 (long long)nfsi->fileid, (long long)fattr->fileid);
1358 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359}
1360
Trond Myklebust55a97592006-06-09 09:34:19 -04001361
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362#ifdef CONFIG_NFS_V4
1363
Linus Torvalds1da177e2005-04-16 15:20:36 -07001364/*
1365 * Clean out any remaining NFSv4 state that might be left over due
1366 * to open() calls that passed nfs_atomic_lookup, but failed to call
1367 * nfs_open().
1368 */
David Howellsf7b422b2006-06-09 09:34:33 -04001369void nfs4_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 /* If we are holding a delegation, return it! */
Trond Myklebuste6f81072008-01-24 18:14:34 -05001372 nfs_inode_return_delegation_noreclaim(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 /* First call standard NFS clear_inode() code */
1374 nfs_clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376#endif
1377
David Howellsf7b422b2006-06-09 09:34:33 -04001378struct inode *nfs_alloc_inode(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379{
1380 struct nfs_inode *nfsi;
Christoph Lametere94b1762006-12-06 20:33:17 -08001381 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 if (!nfsi)
1383 return NULL;
Chuck Lever55296802005-08-18 11:24:09 -07001384 nfsi->flags = 0UL;
1385 nfsi->cache_validity = 0UL;
Trond Myklebust458818e2005-06-22 17:16:27 +00001386#ifdef CONFIG_NFS_V3_ACL
1387 nfsi->acl_access = ERR_PTR(-EAGAIN);
1388 nfsi->acl_default = ERR_PTR(-EAGAIN);
1389#endif
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00001390#ifdef CONFIG_NFS_V4
1391 nfsi->nfs4_acl = NULL;
1392#endif /* CONFIG_NFS_V4 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 return &nfsi->vfs_inode;
1394}
1395
David Howellsf7b422b2006-06-09 09:34:33 -04001396void nfs_destroy_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397{
1398 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1399}
1400
Andrew Mortond75d5412006-06-25 02:41:26 -07001401static inline void nfs4_init_once(struct nfs_inode *nfsi)
1402{
1403#ifdef CONFIG_NFS_V4
1404 INIT_LIST_HEAD(&nfsi->open_states);
1405 nfsi->delegation = NULL;
1406 nfsi->delegation_state = 0;
1407 init_rwsem(&nfsi->rwsem);
1408#endif
1409}
David Howellsf7b422b2006-06-09 09:34:33 -04001410
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001411static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412{
1413 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1414
Christoph Lametera35afb82007-05-16 22:10:57 -07001415 inode_init_once(&nfsi->vfs_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -07001416 INIT_LIST_HEAD(&nfsi->open_files);
1417 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1418 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1419 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
Christoph Lametera35afb82007-05-16 22:10:57 -07001420 nfsi->npages = 0;
Trond Myklebust565277f2007-10-15 18:17:53 -04001421 atomic_set(&nfsi->silly_count, 1);
1422 INIT_HLIST_HEAD(&nfsi->silly_list);
1423 init_waitqueue_head(&nfsi->waitqueue);
Christoph Lametera35afb82007-05-16 22:10:57 -07001424 nfs4_init_once(nfsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425}
Paul Mundt20c2df82007-07-20 10:11:58 +09001426
David Howellsf7b422b2006-06-09 09:34:33 -04001427static int __init nfs_init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428{
1429 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1430 sizeof(struct nfs_inode),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001431 0, (SLAB_RECLAIM_ACCOUNT|
1432 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001433 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 if (nfs_inode_cachep == NULL)
1435 return -ENOMEM;
1436
1437 return 0;
1438}
1439
David Brownell266bee82006-06-27 12:59:15 -07001440static void nfs_destroy_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001442 kmem_cache_destroy(nfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443}
1444
Trond Myklebust57460062008-02-19 20:04:22 -05001445struct workqueue_struct *nfsiod_workqueue;
1446
1447/*
1448 * start up the nfsiod workqueue
1449 */
1450static int nfsiod_start(void)
1451{
1452 struct workqueue_struct *wq;
1453 dprintk("RPC: creating workqueue nfsiod\n");
1454 wq = create_singlethread_workqueue("nfsiod");
1455 if (wq == NULL)
1456 return -ENOMEM;
1457 nfsiod_workqueue = wq;
1458 return 0;
1459}
1460
1461/*
1462 * Destroy the nfsiod workqueue
1463 */
1464static void nfsiod_stop(void)
1465{
1466 struct workqueue_struct *wq;
1467
1468 wq = nfsiod_workqueue;
1469 if (wq == NULL)
1470 return;
1471 nfsiod_workqueue = NULL;
1472 destroy_workqueue(wq);
1473}
1474
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475/*
1476 * Initialize NFS
1477 */
1478static int __init init_nfs_fs(void)
1479{
1480 int err;
1481
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001482 err = nfs_dns_resolver_init();
1483 if (err < 0)
1484 goto out8;
1485
David Howells8ec442a2009-04-03 16:42:42 +01001486 err = nfs_fscache_register();
1487 if (err < 0)
1488 goto out7;
1489
Trond Myklebust57460062008-02-19 20:04:22 -05001490 err = nfsiod_start();
1491 if (err)
1492 goto out6;
1493
David Howells6aaca562006-08-22 20:06:13 -04001494 err = nfs_fs_proc_init();
1495 if (err)
1496 goto out5;
1497
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 err = nfs_init_nfspagecache();
1499 if (err)
1500 goto out4;
1501
1502 err = nfs_init_inodecache();
1503 if (err)
1504 goto out3;
1505
1506 err = nfs_init_readpagecache();
1507 if (err)
1508 goto out2;
1509
1510 err = nfs_init_writepagecache();
1511 if (err)
1512 goto out1;
1513
Linus Torvalds1da177e2005-04-16 15:20:36 -07001514 err = nfs_init_directcache();
1515 if (err)
1516 goto out0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517
1518#ifdef CONFIG_PROC_FS
1519 rpc_proc_register(&nfs_rpcstat);
1520#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001521 if ((err = register_nfs_fs()) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 goto out;
1523 return 0;
1524out:
1525#ifdef CONFIG_PROC_FS
1526 rpc_proc_unregister("nfs");
1527#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 nfs_destroy_directcache();
Chuck Lever6b59a752005-11-30 18:08:19 -05001529out0:
Chuck Lever6b59a752005-11-30 18:08:19 -05001530 nfs_destroy_writepagecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531out1:
1532 nfs_destroy_readpagecache();
1533out2:
1534 nfs_destroy_inodecache();
1535out3:
1536 nfs_destroy_nfspagecache();
1537out4:
David Howells6aaca562006-08-22 20:06:13 -04001538 nfs_fs_proc_exit();
1539out5:
Trond Myklebust57460062008-02-19 20:04:22 -05001540 nfsiod_stop();
1541out6:
David Howells8ec442a2009-04-03 16:42:42 +01001542 nfs_fscache_unregister();
1543out7:
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001544 nfs_dns_resolver_destroy();
1545out8:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 return err;
1547}
1548
1549static void __exit exit_nfs_fs(void)
1550{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 nfs_destroy_directcache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 nfs_destroy_writepagecache();
1553 nfs_destroy_readpagecache();
1554 nfs_destroy_inodecache();
1555 nfs_destroy_nfspagecache();
David Howells8ec442a2009-04-03 16:42:42 +01001556 nfs_fscache_unregister();
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001557 nfs_dns_resolver_destroy();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558#ifdef CONFIG_PROC_FS
1559 rpc_proc_unregister("nfs");
1560#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001561 unregister_nfs_fs();
David Howells6aaca562006-08-22 20:06:13 -04001562 nfs_fs_proc_exit();
Trond Myklebust57460062008-02-19 20:04:22 -05001563 nfsiod_stop();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564}
1565
1566/* Not quite true; I just maintain it */
1567MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1568MODULE_LICENSE("GPL");
Trond Myklebustf43bf0b2007-10-09 12:01:04 -04001569module_param(enable_ino64, bool, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
1571module_init(init_nfs_fs)
1572module_exit(exit_nfs_fs)