blob: 0f9852ab87bb1a3ff64ca12d654747681a0e1151 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090039#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41#include <asm/system.h>
42#include <asm/uaccess.h>
43
Trond Myklebust4ce79712005-06-22 17:16:21 +000044#include "nfs4_fs.h"
Trond Myklebusta72b4422006-01-03 09:55:41 +010045#include "callback.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include "delegation.h"
Chuck Leverd9ef5a82006-03-20 13:44:13 -050047#include "iostat.h"
David Howellsf7b422b2006-06-09 09:34:33 -040048#include "internal.h"
David Howells8ec442a2009-04-03 16:42:42 +010049#include "fscache.h"
Trond Myklebuste571cbf2009-08-19 18:12:27 -040050#include "dns_resolve.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52#define NFSDBG_FACILITY NFSDBG_VFS
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040054#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
55
56/* Default is to see 64-bit inode numbers */
57static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059static void nfs_invalidate_inode(struct inode *);
Trond Myklebust24aa1fe2005-12-03 15:20:07 -050060static int nfs_update_inode(struct inode *, struct nfs_fattr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Christoph Lametere18b8902006-12-06 20:33:20 -080062static struct kmem_cache * nfs_inode_cachep;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000063
Linus Torvalds1da177e2005-04-16 15:20:36 -070064static inline unsigned long
65nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
66{
67 return nfs_fileid_to_ino_t(fattr->fileid);
68}
69
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040070/**
Trond Myklebust72cb77f2009-03-11 14:10:30 -040071 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
72 * @word: long word containing the bit lock
73 */
74int nfs_wait_bit_killable(void *word)
75{
76 if (fatal_signal_pending(current))
77 return -ERESTARTSYS;
78 schedule();
79 return 0;
80}
81
82/**
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040083 * nfs_compat_user_ino64 - returns the user-visible inode number
84 * @fileid: 64-bit fileid
85 *
86 * This function returns a 32-bit inode number if the boot parameter
87 * nfs.enable_ino64 is zero.
88 */
89u64 nfs_compat_user_ino64(u64 fileid)
90{
91 int ino;
92
93 if (enable_ino64)
94 return fileid;
95 ino = fileid;
96 if (sizeof(ino) < sizeof(fileid))
97 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
98 return ino;
99}
100
David Howellsf7b422b2006-06-09 09:34:33 -0400101void nfs_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
Trond Myklebustda6d5032006-06-01 17:26:35 -0400103 /*
104 * The following should never happen...
105 */
106 BUG_ON(nfs_have_writebacks(inode));
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400107 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
Trond Myklebustada70d92005-06-22 17:16:22 +0000108 nfs_zap_acl_cache(inode);
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400109 nfs_access_zap_cache(inode);
David Howellsef79c092009-04-03 16:42:43 +0100110 nfs_fscache_release_inode_cookie(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111}
112
Trond Myklebust29884df2005-12-13 16:13:54 -0500113/**
114 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
115 */
116int nfs_sync_mapping(struct address_space *mapping)
117{
Trond Myklebust5cf95212010-02-19 17:03:29 -0800118 int ret = 0;
Trond Myklebust29884df2005-12-13 16:13:54 -0500119
Trond Myklebust5cf95212010-02-19 17:03:29 -0800120 if (mapping->nrpages != 0) {
121 unmap_mapping_range(mapping, 0, 0, 0);
122 ret = nfs_wb_all(mapping->host);
123 }
Trond Myklebust29884df2005-12-13 16:13:54 -0500124 return ret;
125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127/*
128 * Invalidate the local caches
129 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500130static void nfs_zap_caches_locked(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
132 struct nfs_inode *nfsi = NFS_I(inode);
133 int mode = inode->i_mode;
134
Chuck Lever91d5b472006-03-20 13:44:14 -0500135 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
136
Trond Myklebustc7c20972007-09-28 19:22:40 -0400137 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
138 nfsi->attrtimeo_timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
141 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
Chuck Lever55296802005-08-18 11:24:09 -0700142 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 -0700143 else
Chuck Lever55296802005-08-18 11:24:09 -0700144 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 -0500145}
Chuck Leverdc592502005-08-18 11:24:12 -0700146
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500147void nfs_zap_caches(struct inode *inode)
148{
149 spin_lock(&inode->i_lock);
150 nfs_zap_caches_locked(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700151 spin_unlock(&inode->i_lock);
Trond Myklebustada70d92005-06-22 17:16:22 +0000152}
153
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700154void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
155{
156 if (mapping->nrpages != 0) {
157 spin_lock(&inode->i_lock);
158 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
159 spin_unlock(&inode->i_lock);
160 }
161}
162
Trond Myklebustf41f7412008-06-11 17:39:04 -0400163void nfs_zap_acl_cache(struct inode *inode)
Trond Myklebustada70d92005-06-22 17:16:22 +0000164{
165 void (*clear_acl_cache)(struct inode *);
166
167 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
168 if (clear_acl_cache != NULL)
169 clear_acl_cache(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700170 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700171 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700172 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173}
174
Trond Myklebustc4812992007-09-28 17:11:45 -0400175void nfs_invalidate_atime(struct inode *inode)
176{
177 spin_lock(&inode->i_lock);
178 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
179 spin_unlock(&inode->i_lock);
180}
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182/*
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500183 * Invalidate, but do not unhash, the inode.
184 * NB: must be called with inode->i_lock held!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500186static void nfs_invalidate_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
Benny Halevy3a10c302008-01-23 08:58:59 +0200188 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500189 nfs_zap_caches_locked(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190}
191
192struct nfs_find_desc {
193 struct nfs_fh *fh;
194 struct nfs_fattr *fattr;
195};
196
197/*
198 * In NFSv3 we can have 64bit inode numbers. In order to support
199 * this, and re-exported directories (also seen in NFSv2)
200 * we are forced to allow 2 different inodes to have the same
201 * i_ino.
202 */
203static int
204nfs_find_actor(struct inode *inode, void *opaque)
205{
206 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
207 struct nfs_fh *fh = desc->fh;
208 struct nfs_fattr *fattr = desc->fattr;
209
210 if (NFS_FILEID(inode) != fattr->fileid)
211 return 0;
212 if (nfs_compare_fh(NFS_FH(inode), fh))
213 return 0;
214 if (is_bad_inode(inode) || NFS_STALE(inode))
215 return 0;
216 return 1;
217}
218
219static int
220nfs_init_locked(struct inode *inode, void *opaque)
221{
222 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
223 struct nfs_fattr *fattr = desc->fattr;
224
Benny Halevy99fadcd2008-01-23 08:59:08 +0200225 set_nfs_fileid(inode, fattr->fileid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 nfs_copy_fh(NFS_FH(inode), desc->fh);
227 return 0;
228}
229
230/* Don't use READDIRPLUS on directories that we believe are too large */
231#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
232
233/*
234 * This is our front-end to iget that looks up inodes by file handle
235 * instead of inode number.
236 */
237struct inode *
238nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
239{
240 struct nfs_find_desc desc = {
241 .fh = fh,
242 .fattr = fattr
243 };
Trond Myklebust03f28e32006-03-20 13:44:48 -0500244 struct inode *inode = ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 unsigned long hash;
246
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400247 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 goto out_no_inode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400249 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 goto out_no_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251
252 hash = nfs_fattr_to_ino_t(fattr);
253
Trond Myklebust03f28e32006-03-20 13:44:48 -0500254 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
255 if (inode == NULL) {
256 inode = ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 goto out_no_inode;
Trond Myklebust03f28e32006-03-20 13:44:48 -0500258 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 if (inode->i_state & I_NEW) {
261 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800262 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264 /* We set i_ino for the few things that still rely on it,
265 * such as stat(2) */
266 inode->i_ino = hash;
267
268 /* We can't support update_atime(), since the server will reset it */
269 inode->i_flags |= S_NOATIME|S_NOCMTIME;
270 inode->i_mode = fattr->mode;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400271 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
272 && nfs_server_capable(inode, NFS_CAP_MODE))
273 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
274 | NFS_INO_INVALID_ACCESS
275 | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 /* Why so? Because we want revalidate for devices/FIFOs, and
277 * that's precisely what we have in nfs_file_inode_operations.
278 */
David Howells8fa5c002006-08-22 20:06:12 -0400279 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 if (S_ISREG(inode->i_mode)) {
281 inode->i_fop = &nfs_file_operations;
282 inode->i_data.a_ops = &nfs_file_aops;
283 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
284 } else if (S_ISDIR(inode->i_mode)) {
David Howells8fa5c002006-08-22 20:06:12 -0400285 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 inode->i_fop = &nfs_dir_operations;
287 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
288 && fattr->size <= NFS_LIMIT_READDIRPLUS)
Benny Halevy3a10c302008-01-23 08:58:59 +0200289 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400290 /* Deal with crossing mountpoints */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400291 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
292 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
Manoj Naik6b97fd32006-06-09 09:34:29 -0400293 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
294 inode->i_op = &nfs_referral_inode_operations;
295 else
296 inode->i_op = &nfs_mountpoint_inode_operations;
Trond Myklebust55a97592006-06-09 09:34:19 -0400297 inode->i_fop = NULL;
Trond Myklebustc37dcd332008-03-06 12:34:50 -0500298 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 } else if (S_ISLNK(inode->i_mode))
301 inode->i_op = &nfs_symlink_inode_operations;
302 else
303 init_special_inode(inode, inode->i_mode, fattr->rdev);
304
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400305 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
306 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
307 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
308 nfsi->change_attr = 0;
309 inode->i_size = 0;
310 inode->i_nlink = 0;
311 inode->i_uid = -2;
312 inode->i_gid = -2;
313 inode->i_blocks = 0;
314 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
315
Trond Myklebust33801142005-10-27 22:12:39 -0400316 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400317 nfsi->attr_gencount = fattr->gencount;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400318 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
319 inode->i_atime = fattr->atime;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400320 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
321 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400322 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
323 inode->i_mtime = fattr->mtime;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400324 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
325 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
326 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400327 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
328 inode->i_ctime = fattr->ctime;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400329 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
330 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
331 | NFS_INO_INVALID_ACCESS
332 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400333 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 nfsi->change_attr = fattr->change_attr;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400335 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
336 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
337 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400338 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
339 inode->i_size = nfs_size_to_loff_t(fattr->size);
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400340 else
341 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
342 | NFS_INO_INVALID_DATA
343 | NFS_INO_REVAL_PAGECACHE;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400344 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
345 inode->i_nlink = fattr->nlink;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400346 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
347 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400348 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
349 inode->i_uid = fattr->uid;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400350 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
351 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
352 | NFS_INO_INVALID_ACCESS
353 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400354 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
355 inode->i_gid = fattr->gid;
Trond Myklebust62ab460c2009-08-09 15:06:19 -0400356 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
357 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
358 | NFS_INO_INVALID_ACCESS
359 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400360 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
361 inode->i_blocks = fattr->du.nfs2.blocks;
362 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 /*
364 * report the blocks in 512byte units
365 */
366 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 }
368 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800369 nfsi->attrtimeo_timestamp = now;
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400370 nfsi->access_cache = RB_ROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
David Howellsef79c092009-04-03 16:42:43 +0100372 nfs_fscache_init_inode_cookie(inode);
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 unlock_new_inode(inode);
375 } else
376 nfs_refresh_inode(inode, fattr);
377 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
378 inode->i_sb->s_id,
379 (long long)NFS_FILEID(inode),
380 atomic_read(&inode->i_count));
381
382out:
383 return inode;
384
385out_no_inode:
Trond Myklebust03f28e32006-03-20 13:44:48 -0500386 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 goto out;
388}
389
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400390#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 -0700391
392int
393nfs_setattr(struct dentry *dentry, struct iattr *attr)
394{
395 struct inode *inode = dentry->d_inode;
396 struct nfs_fattr fattr;
397 int error;
398
Chuck Lever91d5b472006-03-20 13:44:14 -0500399 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
400
Jeff Layton188b95d2007-10-18 03:05:21 -0700401 /* skip mode change if it's just for clearing setuid/setgid */
402 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
403 attr->ia_valid &= ~ATTR_MODE;
404
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 if (attr->ia_valid & ATTR_SIZE) {
406 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
407 attr->ia_valid &= ~ATTR_SIZE;
408 }
409
410 /* Optimization: if the end result is no change, don't RPC */
411 attr->ia_valid &= NFS_VALID_ATTRS;
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400412 if ((attr->ia_valid & ~ATTR_FILE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return 0;
414
Trond Myklebust755c1e22006-03-20 13:44:06 -0500415 /* Write all dirty data */
Trond Myklebuste1552e12007-04-14 19:07:28 -0400416 if (S_ISREG(inode->i_mode)) {
417 filemap_write_and_wait(inode->i_mapping);
418 nfs_wb_all(inode);
419 }
Trond Myklebust642ac542005-10-18 14:20:19 -0700420 /*
421 * Return any delegations if we're going to change ACLs
422 */
423 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
424 nfs_inode_return_delegation(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400426 if (error == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 nfs_refresh_inode(inode, &fattr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400428 return error;
429}
430
431/**
Trond Myklebusta3d01452008-06-11 12:21:19 -0400432 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
433 * @inode: inode of the file used
434 * @offset: file offset to start truncating
435 *
436 * This is a copy of the common vmtruncate, but with the locking
437 * corrected to take into account the fact that NFS requires
438 * inode->i_size to be updated under the inode->i_lock.
439 */
440static int nfs_vmtruncate(struct inode * inode, loff_t offset)
441{
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000442 loff_t oldsize;
443 int err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400444
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000445 err = inode_newsize_ok(inode, offset);
446 if (err)
447 goto out;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400448
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000449 spin_lock(&inode->i_lock);
450 oldsize = inode->i_size;
451 i_size_write(inode, offset);
452 spin_unlock(&inode->i_lock);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400453
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000454 truncate_pagecache(inode, oldsize, offset);
455out:
456 return err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400457}
458
459/**
Trond Myklebust65e43082005-08-16 11:49:44 -0400460 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
461 * @inode: pointer to struct inode
462 * @attr: pointer to struct iattr
463 *
464 * Note: we do this in the *proc.c in order to ensure that
465 * it works for things like exclusive creates too.
466 */
467void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
468{
469 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
Trond Myklebust2f28ea62008-10-05 14:26:11 -0400470 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if ((attr->ia_valid & ATTR_MODE) != 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -0400472 int mode = attr->ia_mode & S_IALLUGO;
473 mode |= inode->i_mode & ~S_IALLUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 inode->i_mode = mode;
475 }
476 if ((attr->ia_valid & ATTR_UID) != 0)
477 inode->i_uid = attr->ia_uid;
478 if ((attr->ia_valid & ATTR_GID) != 0)
479 inode->i_gid = attr->ia_gid;
Chuck Lever55296802005-08-18 11:24:09 -0700480 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700481 spin_unlock(&inode->i_lock);
Trond Myklebust65e43082005-08-16 11:49:44 -0400482 }
483 if ((attr->ia_valid & ATTR_SIZE) != 0) {
Chuck Lever91d5b472006-03-20 13:44:14 -0500484 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400485 nfs_vmtruncate(inode, attr->ia_size);
Trond Myklebust65e43082005-08-16 11:49:44 -0400486 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487}
488
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
490{
491 struct inode *inode = dentry->d_inode;
Chuck Lever55296802005-08-18 11:24:09 -0700492 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 int err;
494
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800495 /* Flush out writes to the server in order to update c/mtime. */
Chuck Lever28c494c2007-10-26 13:32:13 -0400496 if (S_ISREG(inode->i_mode)) {
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800497 err = filemap_write_and_wait(inode->i_mapping);
498 if (err)
499 goto out;
Chuck Lever28c494c2007-10-26 13:32:13 -0400500 }
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800501
502 /*
503 * We may force a getattr if the user cares about atime.
504 *
505 * Note that we only have to check the vfsmount flags here:
506 * - NFS always sets S_NOATIME by so checking it would give a
507 * bogus result
508 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
509 * no point in checking those.
510 */
511 if ((mnt->mnt_flags & MNT_NOATIME) ||
512 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 need_atime = 0;
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 if (need_atime)
516 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
517 else
518 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
Peter Staubach4e769b92007-08-03 15:07:10 -0400519 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 generic_fillattr(inode, stat);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400521 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
Peter Staubach4e769b92007-08-03 15:07:10 -0400522 }
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800523out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 return err;
525}
526
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400527/**
528 * nfs_close_context - Common close_context() routine NFSv2/v3
529 * @ctx: pointer to context
530 * @is_sync: is this a synchronous close
531 *
532 * always ensure that the attributes are up to date if we're mounted
533 * with close-to-open semantics
534 */
535void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
536{
537 struct inode *inode;
538 struct nfs_server *server;
539
540 if (!(ctx->mode & FMODE_WRITE))
541 return;
542 if (!is_sync)
543 return;
544 inode = ctx->path.dentry->d_inode;
545 if (!list_empty(&NFS_I(inode)->open_files))
546 return;
547 server = NFS_SERVER(inode);
548 if (server->flags & NFS_MOUNT_NOCTO)
549 return;
550 nfs_revalidate_inode(server, inode);
551}
552
Al Viro6eae7972010-01-30 13:44:07 -0500553static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554{
555 struct nfs_open_context *ctx;
556
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700557 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 if (ctx != NULL) {
Al Viro6eae7972010-01-30 13:44:07 -0500559 ctx->path = *path;
560 path_get(&ctx->path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 ctx->cred = get_rpccred(cred);
562 ctx->state = NULL;
563 ctx->lockowner = current->files;
Jeff Layton66d3aac2008-03-31 15:01:58 -0400564 ctx->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 ctx->error = 0;
Olivier Galibert00a92642005-06-22 17:16:29 +0000566 ctx->dir_cookie = 0;
Trond Myklebust5e119342007-07-26 12:06:17 -0400567 atomic_set(&ctx->count, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 }
569 return ctx;
570}
571
572struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
573{
574 if (ctx != NULL)
Trond Myklebust5e119342007-07-26 12:06:17 -0400575 atomic_inc(&ctx->count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 return ctx;
577}
578
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400579static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400580{
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400581 struct inode *inode = ctx->path.dentry->d_inode;
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400582
Trond Myklebust5e119342007-07-26 12:06:17 -0400583 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
584 return;
585 list_del(&ctx->list);
586 spin_unlock(&inode->i_lock);
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400587 NFS_PROTO(inode)->close_context(ctx, is_sync);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400588 if (ctx->cred != NULL)
589 put_rpccred(ctx->cred);
Jan Blunck31f31db12008-05-02 13:42:45 -0700590 path_put(&ctx->path);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400591 kfree(ctx);
592}
593
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400594void put_nfs_open_context(struct nfs_open_context *ctx)
595{
596 __put_nfs_open_context(ctx, 0);
597}
598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599/*
600 * Ensure that mmap has a recent RPC credential for use when writing out
601 * shared pages
602 */
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500603static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800605 struct inode *inode = filp->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 struct nfs_inode *nfsi = NFS_I(inode);
607
608 filp->private_data = get_nfs_open_context(ctx);
609 spin_lock(&inode->i_lock);
610 list_add(&ctx->list, &nfsi->open_files);
611 spin_unlock(&inode->i_lock);
612}
613
Trond Myklebustd5308382005-11-04 15:33:38 -0500614/*
615 * Given an inode, search for an open context with the desired characteristics
616 */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500617struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618{
619 struct nfs_inode *nfsi = NFS_I(inode);
620 struct nfs_open_context *pos, *ctx = NULL;
621
622 spin_lock(&inode->i_lock);
623 list_for_each_entry(pos, &nfsi->open_files, list) {
Trond Myklebustd5308382005-11-04 15:33:38 -0500624 if (cred != NULL && pos->cred != cred)
625 continue;
Trond Myklebust1544fa02010-03-25 13:54:49 -0400626 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
627 continue;
628 ctx = get_nfs_open_context(pos);
629 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 }
631 spin_unlock(&inode->i_lock);
632 return ctx;
633}
634
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500635static void nfs_file_clear_open_context(struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800637 struct inode *inode = filp->f_path.dentry->d_inode;
Trond Myklebustcd3758e2007-08-10 17:44:32 -0400638 struct nfs_open_context *ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640 if (ctx) {
641 filp->private_data = NULL;
642 spin_lock(&inode->i_lock);
643 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
644 spin_unlock(&inode->i_lock);
Chuck Leverf895c532010-02-01 14:17:50 -0500645 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 }
647}
648
649/*
650 * These allocate and release file read/write context information.
651 */
652int nfs_open(struct inode *inode, struct file *filp)
653{
654 struct nfs_open_context *ctx;
655 struct rpc_cred *cred;
656
Trond Myklebust98a8e322008-03-12 12:25:28 -0400657 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 if (IS_ERR(cred))
659 return PTR_ERR(cred);
Al Viro6eae7972010-01-30 13:44:07 -0500660 ctx = alloc_nfs_open_context(&filp->f_path, cred);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 put_rpccred(cred);
662 if (ctx == NULL)
663 return -ENOMEM;
664 ctx->mode = filp->f_mode;
665 nfs_file_set_open_context(filp, ctx);
666 put_nfs_open_context(ctx);
David Howellsef79c092009-04-03 16:42:43 +0100667 nfs_fscache_set_inode_cookie(inode, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 return 0;
669}
670
671int nfs_release(struct inode *inode, struct file *filp)
672{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 nfs_file_clear_open_context(filp);
674 return 0;
675}
676
677/*
678 * This function is called whenever some part of NFS notices that
679 * the cached attributes have to be refreshed.
680 */
681int
682__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
683{
684 int status = -ESTALE;
685 struct nfs_fattr fattr;
686 struct nfs_inode *nfsi = NFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
689 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
690
Chuck Lever85233a72006-10-19 23:28:42 -0700691 if (is_bad_inode(inode))
Chuck Lever412d5822005-08-18 11:24:11 -0700692 goto out;
Trond Myklebust7fdc49c2007-09-28 19:11:33 -0400693 if (NFS_STALE(inode))
694 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695
Trond Myklebust691beb12008-10-05 14:48:22 -0400696 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
698 if (status != 0) {
699 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
700 inode->i_sb->s_id,
701 (long long)NFS_FILEID(inode), status);
702 if (status == -ESTALE) {
703 nfs_zap_caches(inode);
704 if (!S_ISDIR(inode->i_mode))
Benny Halevy3a10c302008-01-23 08:58:59 +0200705 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 }
707 goto out;
708 }
709
Trond Myklebust4dc05ef2008-09-23 17:28:42 -0400710 status = nfs_refresh_inode(inode, &fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 if (status) {
712 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
713 inode->i_sb->s_id,
714 (long long)NFS_FILEID(inode), status);
715 goto out;
716 }
Chuck Lever55296802005-08-18 11:24:09 -0700717
Trond Myklebust24aa1fe2005-12-03 15:20:07 -0500718 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
Trond Myklebustada70d92005-06-22 17:16:22 +0000719 nfs_zap_acl_cache(inode);
Chuck Lever55296802005-08-18 11:24:09 -0700720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
722 inode->i_sb->s_id,
723 (long long)NFS_FILEID(inode));
724
Chuck Lever412d5822005-08-18 11:24:11 -0700725 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return status;
727}
728
729int nfs_attribute_timeout(struct inode *inode)
730{
731 struct nfs_inode *nfsi = NFS_I(inode);
732
Trond Myklebustb4d23142010-03-10 15:21:44 -0500733 if (nfs_have_delegated_attributes(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 return 0;
Peter Staubach64672d52008-12-23 15:21:56 -0500735 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736}
737
738/**
739 * nfs_revalidate_inode - Revalidate the inode attributes
740 * @server - pointer to nfs_server struct
741 * @inode - pointer to inode struct
742 *
743 * Updates inode attribute information by retrieving the data from the server.
744 */
745int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
746{
Trond Myklebust44b11872006-05-25 01:40:59 -0400747 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 && !nfs_attribute_timeout(inode))
749 return NFS_STALE(inode) ? -ESTALE : 0;
750 return __nfs_revalidate_inode(server, inode);
751}
752
Trond Myklebust1cda7072010-02-19 17:03:30 -0800753static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800754{
755 struct nfs_inode *nfsi = NFS_I(inode);
756
757 if (mapping->nrpages != 0) {
758 int ret = invalidate_inode_pages2(mapping);
759 if (ret < 0)
760 return ret;
761 }
762 spin_lock(&inode->i_lock);
763 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
Trond Myklebust2f78e432007-09-30 15:31:19 -0400764 if (S_ISDIR(inode->i_mode))
Trond Myklebust717d44e2007-01-24 11:54:55 -0800765 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
Trond Myklebust717d44e2007-01-24 11:54:55 -0800766 spin_unlock(&inode->i_lock);
767 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
David Howellsef79c092009-04-03 16:42:43 +0100768 nfs_fscache_reset_inode_cookie(inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800769 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
770 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
771 return 0;
772}
773
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774/**
Trond Myklebust7d52e862005-06-22 17:16:30 +0000775 * nfs_revalidate_mapping - Revalidate the pagecache
776 * @inode - pointer to host inode
777 * @mapping - pointer to mapping
778 */
Trond Myklebust44b11872006-05-25 01:40:59 -0400779int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust7d52e862005-06-22 17:16:30 +0000780{
781 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust44b11872006-05-25 01:40:59 -0400782 int ret = 0;
783
Trond Myklebust44b11872006-05-25 01:40:59 -0400784 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800785 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
Trond Myklebust44b11872006-05-25 01:40:59 -0400786 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800787 if (ret < 0)
788 goto out;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000789 }
Trond Myklebust717d44e2007-01-24 11:54:55 -0800790 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
791 ret = nfs_invalidate_mapping(inode, mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700792out:
Trond Myklebust44b11872006-05-25 01:40:59 -0400793 return ret;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000794}
795
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100796static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
797{
798 struct nfs_inode *nfsi = NFS_I(inode);
799
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400800 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
801 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
802 && nfsi->change_attr == fattr->pre_change_attr) {
Trond Myklebust70ca8852007-09-30 15:21:24 -0400803 nfsi->change_attr = fattr->change_attr;
804 if (S_ISDIR(inode->i_mode))
805 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
806 }
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100807 /* If we have atomic WCC data, we may update some attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400808 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
809 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
810 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100811 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400812
813 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
814 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
815 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100816 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebuste323ea42007-09-30 17:03:25 -0400817 if (S_ISDIR(inode->i_mode))
818 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100819 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400820 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
821 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
822 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
823 && nfsi->npages == 0)
824 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100825}
826
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827/**
Trond Myklebust33801142005-10-27 22:12:39 -0400828 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 * @inode - pointer to inode
830 * @fattr - updated attributes
831 *
832 * Verifies the attribute cache. If we have just changed the attributes,
833 * so that fattr carries weak cache consistency data, then it may
834 * also update the ctime/mtime/change_attribute.
835 */
Trond Myklebust33801142005-10-27 22:12:39 -0400836static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837{
838 struct nfs_inode *nfsi = NFS_I(inode);
839 loff_t cur_size, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400840 unsigned long invalid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841
Chuck Leverdc592502005-08-18 11:24:12 -0700842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 /* Has the inode gone and changed behind our back? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400844 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 return -EIO;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400846 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
847 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400849 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
Trond Myklebustf1bb0b92006-05-25 01:40:55 -0400850 nfsi->change_attr != fattr->change_attr)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400851 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 /* Verify a few of the more important attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400854 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400855 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Trond Myklebustca62b9c2006-03-20 13:44:07 -0500856
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400857 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
858 cur_size = i_size_read(inode);
859 new_isize = nfs_size_to_loff_t(fattr->size);
860 if (cur_size != new_isize && nfsi->npages == 0)
861 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
862 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 /* Have any file permissions changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400865 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
866 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
867 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
868 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
869 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400870 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 /* Has the link count changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400873 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400874 invalid |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400876 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400877 invalid |= NFS_INO_INVALID_ATIME;
878
879 if (invalid != 0)
880 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881
Trond Myklebust33801142005-10-27 22:12:39 -0400882 nfsi->read_cache_jiffies = fattr->time_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 return 0;
884}
885
Trond Myklebusta10ad172008-09-23 17:28:41 -0400886static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
887{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400888 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
889 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400890 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
891}
892
893static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
894{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400895 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
896 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400897 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
898}
899
Trond Myklebustae05f262008-10-28 15:21:40 -0400900static atomic_long_t nfs_attr_generation_counter;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400901
902static unsigned long nfs_read_attr_generation_counter(void)
903{
Trond Myklebustae05f262008-10-28 15:21:40 -0400904 return atomic_long_read(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400905}
906
907unsigned long nfs_inc_attr_generation_counter(void)
908{
Trond Myklebustae05f262008-10-28 15:21:40 -0400909 return atomic_long_inc_return(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400910}
911
912void nfs_fattr_init(struct nfs_fattr *fattr)
913{
914 fattr->valid = 0;
915 fattr->time_start = jiffies;
916 fattr->gencount = nfs_inc_attr_generation_counter();
917}
918
Trond Myklebust2d36bfde2010-04-16 16:22:45 -0400919struct nfs_fattr *nfs_alloc_fattr(void)
920{
921 struct nfs_fattr *fattr;
922
923 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
924 if (fattr != NULL)
925 nfs_fattr_init(fattr);
926 return fattr;
927}
928
929struct nfs_fh *nfs_alloc_fhandle(void)
930{
931 struct nfs_fh *fh;
932
933 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
934 if (fh != NULL)
935 fh->size = 0;
936 return fh;
937}
938
Trond Myklebusta10ad172008-09-23 17:28:41 -0400939/**
940 * nfs_inode_attrs_need_update - check if the inode attributes need updating
941 * @inode - pointer to inode
942 * @fattr - attributes
943 *
944 * Attempt to divine whether or not an RPC call reply carrying stale
945 * attributes got scheduled after another call carrying updated ones.
946 *
947 * To do so, the function first assumes that a more recent ctime means
948 * that the attributes in fattr are newer, however it also attempt to
949 * catch the case where ctime either didn't change, or went backwards
950 * (if someone reset the clock on the server) by looking at whether
951 * or not this RPC call was started after the inode was last updated.
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400952 * Note also the check for wraparound of 'attr_gencount'
Trond Myklebusta10ad172008-09-23 17:28:41 -0400953 *
954 * The function returns 'true' if it thinks the attributes in 'fattr' are
955 * more recent than the ones cached in the inode.
956 *
957 */
958static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
959{
960 const struct nfs_inode *nfsi = NFS_I(inode);
961
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400962 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
Trond Myklebust03254e62008-10-09 13:27:55 -0400963 nfs_ctime_need_update(inode, fattr) ||
964 nfs_size_need_update(inode, fattr) ||
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400965 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
Trond Myklebusta10ad172008-09-23 17:28:41 -0400966}
967
Trond Myklebust870a5be2008-10-05 12:07:23 -0400968static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
969{
Trond Myklebusta10ad172008-09-23 17:28:41 -0400970 if (nfs_inode_attrs_need_update(inode, fattr))
Trond Myklebust870a5be2008-10-05 12:07:23 -0400971 return nfs_update_inode(inode, fattr);
972 return nfs_check_inode_attributes(inode, fattr);
973}
974
Trond Myklebust33801142005-10-27 22:12:39 -0400975/**
976 * nfs_refresh_inode - try to update the inode attribute cache
977 * @inode - pointer to inode
978 * @fattr - updated attributes
979 *
980 * Check that an RPC call that returned attributes has not overlapped with
981 * other recent updates of the inode metadata, then decide whether it is
982 * safe to do a full update of the inode attributes, or whether just to
983 * call nfs_check_inode_attributes.
984 */
985int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
986{
Trond Myklebust33801142005-10-27 22:12:39 -0400987 int status;
988
989 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
990 return 0;
991 spin_lock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -0400992 status = nfs_refresh_inode_locked(inode, fattr);
Trond Myklebust33801142005-10-27 22:12:39 -0400993 spin_unlock(&inode->i_lock);
David Howellsef79c092009-04-03 16:42:43 +0100994
Trond Myklebust33801142005-10-27 22:12:39 -0400995 return status;
996}
997
Trond Myklebustd65f5572008-10-05 12:27:55 -0400998static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
999{
1000 struct nfs_inode *nfsi = NFS_I(inode);
1001
1002 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1003 if (S_ISDIR(inode->i_mode))
1004 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1005 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1006 return 0;
1007 return nfs_refresh_inode_locked(inode, fattr);
1008}
1009
Trond Myklebustdecf4912005-10-27 22:12:39 -04001010/**
1011 * nfs_post_op_update_inode - try to update the inode attribute cache
1012 * @inode - pointer to inode
1013 * @fattr - updated attributes
1014 *
1015 * After an operation that has changed the inode metadata, mark the
1016 * attribute cache as being invalid, then try to update it.
Chuck Leverf551e442006-09-20 14:33:04 -04001017 *
1018 * NB: if the server didn't return any post op attributes, this
1019 * function will force the retrieval of attributes before the next
1020 * NFS request. Thus it should be used only for operations that
1021 * are expected to change one or more attributes, to avoid
1022 * unnecessary NFS requests and trips through nfs_update_inode().
Trond Myklebustdecf4912005-10-27 22:12:39 -04001023 */
1024int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1025{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001026 int status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001027
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001028 spin_lock(&inode->i_lock);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001029 status = nfs_post_op_update_inode_locked(inode, fattr);
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001030 spin_unlock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001031 return status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001032}
1033
Trond Myklebust70ca8852007-09-30 15:21:24 -04001034/**
1035 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1036 * @inode - pointer to inode
1037 * @fattr - updated attributes
1038 *
1039 * After an operation that has changed the inode metadata, mark the
1040 * attribute cache as being invalid, then try to update it. Fake up
1041 * weak cache consistency data, if none exist.
1042 *
1043 * This function is mainly designed to be used by the ->write_done() functions.
1044 */
1045int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1046{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001047 int status;
1048
1049 spin_lock(&inode->i_lock);
1050 /* Don't do a WCC update if these attributes are already stale */
1051 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1052 !nfs_inode_attrs_need_update(inode, fattr)) {
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001053 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1054 | NFS_ATTR_FATTR_PRESIZE
1055 | NFS_ATTR_FATTR_PREMTIME
1056 | NFS_ATTR_FATTR_PRECTIME);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001057 goto out_noforce;
1058 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001059 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1060 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001061 fattr->pre_change_attr = NFS_I(inode)->change_attr;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001062 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001063 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001064 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1065 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001066 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001067 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1068 }
1069 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1070 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001071 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001072 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1073 }
1074 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1075 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
Trond Myklebusta3d01452008-06-11 12:21:19 -04001076 fattr->pre_size = i_size_read(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001077 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001078 }
Trond Myklebustd65f5572008-10-05 12:27:55 -04001079out_noforce:
1080 status = nfs_post_op_update_inode_locked(inode, fattr);
1081 spin_unlock(&inode->i_lock);
1082 return status;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001083}
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085/*
1086 * Many nfs protocol calls return the new file attributes after
1087 * an operation. Here we update the inode to reflect the state
1088 * of the server's inode.
1089 *
1090 * This is a bit tricky because we have to make sure all dirty pages
1091 * have been sent off to the server before calling invalidate_inode_pages.
1092 * To make sure no other process adds more write requests while we try
1093 * our best to flush them, we make them sleep during the attribute refresh.
1094 *
1095 * A very similar scenario holds for the dir cache.
1096 */
Trond Myklebust24aa1fe2005-12-03 15:20:07 -05001097static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098{
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001099 struct nfs_server *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001101 loff_t cur_isize, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -04001102 unsigned long invalid = 0;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001103 unsigned long now = jiffies;
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001104 unsigned long save_cache_validity;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105
1106 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001107 __func__, inode->i_sb->s_id, inode->i_ino,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 atomic_read(&inode->i_count), fattr->valid);
1109
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001110 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Chuck Lever325cfed2005-11-30 18:08:55 -05001111 goto out_fileid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112
1113 /*
1114 * Make sure the inode's type hasn't changed.
1115 */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001116 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 goto out_changed;
1118
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001119 server = NFS_SERVER(inode);
Trond Myklebusta0356862007-06-05 13:26:15 -04001120 /* Update the fsid? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001121 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Trond Myklebustc37dcd332008-03-06 12:34:50 -05001122 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1123 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001124 server->fsid = fattr->fsid;
1125
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 /*
1127 * Update the read time so we don't revalidate too often.
1128 */
Trond Myklebust33801142005-10-27 22:12:39 -04001129 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001130
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001131 save_cache_validity = nfsi->cache_validity;
1132 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1133 | NFS_INO_INVALID_ATIME
1134 | NFS_INO_REVAL_FORCED
1135 | NFS_INO_REVAL_PAGECACHE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Trond Myklebusta895b4a2006-01-03 09:55:40 +01001137 /* Do atomic weak cache consistency updates */
1138 nfs_wcc_update_inode(inode, fattr);
1139
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001140 /* More cache consistency checks */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001141 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1142 if (nfsi->change_attr != fattr->change_attr) {
1143 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1144 inode->i_sb->s_id, inode->i_ino);
1145 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1146 if (S_ISDIR(inode->i_mode))
1147 nfs_force_lookup_revalidate(inode);
1148 nfsi->change_attr = fattr->change_attr;
1149 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001150 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1151 invalid |= save_cache_validity;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001152
1153 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001154 /* NFSv2/v3: Check if the mtime agrees */
1155 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1156 dprintk("NFS: mtime change on server for file %s/%ld\n",
1157 inode->i_sb->s_id, inode->i_ino);
1158 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebustbfc69a42007-10-15 18:18:29 -04001159 if (S_ISDIR(inode->i_mode))
1160 nfs_force_lookup_revalidate(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001161 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001162 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001163 } else if (server->caps & NFS_CAP_MTIME)
1164 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1165 | NFS_INO_INVALID_DATA
1166 | NFS_INO_REVAL_PAGECACHE
1167 | NFS_INO_REVAL_FORCED);
1168
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001169 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001170 /* If ctime has changed we should definitely clear access+acl caches */
NeilBrown37d9d762009-03-11 14:10:23 -04001171 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001172 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
NeilBrown37d9d762009-03-11 14:10:23 -04001173 /* and probably clear data for a directory too as utimes can cause
1174 * havoc with our cache.
1175 */
1176 if (S_ISDIR(inode->i_mode)) {
1177 invalid |= NFS_INO_INVALID_DATA;
1178 nfs_force_lookup_revalidate(inode);
1179 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001180 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
NeilBrown37d9d762009-03-11 14:10:23 -04001181 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001182 } else if (server->caps & NFS_CAP_CTIME)
1183 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1184 | NFS_INO_INVALID_ACCESS
1185 | NFS_INO_INVALID_ACL
1186 | NFS_INO_REVAL_FORCED);
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001187
Trond Myklebust951a1432005-06-22 17:16:30 +00001188 /* Check if our cached file size is stale */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001189 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1190 new_isize = nfs_size_to_loff_t(fattr->size);
1191 cur_isize = i_size_read(inode);
1192 if (new_isize != cur_isize) {
1193 /* Do we perhaps have any outstanding writes, or has
1194 * the file grown beyond our last write? */
1195 if (nfsi->npages == 0 || new_isize > cur_isize) {
1196 i_size_write(inode, new_isize);
1197 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1198 }
1199 dprintk("NFS: isize change on server for file %s/%ld\n",
1200 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001202 } else
1203 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1204 | NFS_INO_REVAL_PAGECACHE
1205 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001208 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1209 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001210 else if (server->caps & NFS_CAP_ATIME)
1211 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1212 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001214 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1215 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
Trond Myklebust9b4b3512010-02-03 08:27:35 -05001216 umode_t newmode = inode->i_mode & S_IFMT;
1217 newmode |= fattr->mode & S_IALLUGO;
1218 inode->i_mode = newmode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001219 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001220 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001221 } else if (server->caps & NFS_CAP_MODE)
1222 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1223 | NFS_INO_INVALID_ACCESS
1224 | NFS_INO_INVALID_ACL
1225 | NFS_INO_REVAL_FORCED);
1226
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001227 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1228 if (inode->i_uid != fattr->uid) {
1229 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1230 inode->i_uid = fattr->uid;
1231 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001232 } else if (server->caps & NFS_CAP_OWNER)
1233 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1234 | NFS_INO_INVALID_ACCESS
1235 | NFS_INO_INVALID_ACL
1236 | NFS_INO_REVAL_FORCED);
1237
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001238 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1239 if (inode->i_gid != fattr->gid) {
1240 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1241 inode->i_gid = fattr->gid;
1242 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001243 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1244 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1245 | NFS_INO_INVALID_ACCESS
1246 | NFS_INO_INVALID_ACL
1247 | NFS_INO_REVAL_FORCED);
Trond Myklebust921615f2008-10-14 19:23:07 -04001248
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001249 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1250 if (inode->i_nlink != fattr->nlink) {
1251 invalid |= NFS_INO_INVALID_ATTR;
1252 if (S_ISDIR(inode->i_mode))
1253 invalid |= NFS_INO_INVALID_DATA;
1254 inode->i_nlink = fattr->nlink;
1255 }
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001256 } else if (server->caps & NFS_CAP_NLINK)
1257 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1258 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001260 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 /*
1262 * report the blocks in 512byte units
1263 */
1264 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001265 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001266 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1267 inode->i_blocks = fattr->du.nfs2.blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268
1269 /* Update attrtimeo value if we're out of the unstable period */
1270 if (invalid & NFS_INO_INVALID_ATTR) {
Chuck Lever91d5b472006-03-20 13:44:14 -05001271 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001273 nfsi->attrtimeo_timestamp = now;
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001274 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001275 } else {
Peter Staubach64672d52008-12-23 15:21:56 -05001276 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001277 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1278 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1279 nfsi->attrtimeo_timestamp = now;
1280 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 }
Trond Myklebustf2115dc2007-08-15 12:49:17 -04001282 invalid &= ~NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 /* Don't invalidate the data if we were to blame */
1284 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1285 || S_ISLNK(inode->i_mode)))
1286 invalid &= ~NFS_INO_INVALID_DATA;
Trond Myklebust412c77c2007-07-03 16:10:55 -04001287 if (!nfs_have_delegation(inode, FMODE_READ) ||
Trond Myklebust62ab460c2009-08-09 15:06:19 -04001288 (save_cache_validity & NFS_INO_REVAL_FORCED))
Chuck Lever55296802005-08-18 11:24:09 -07001289 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
1291 return 0;
1292 out_changed:
1293 /*
1294 * Big trouble! The inode has become a different object.
1295 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001297 __func__, inode->i_ino, inode->i_mode, fattr->mode);
Trond Myklebustb37b03b2005-11-25 17:10:06 -05001298 out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 /*
1300 * No need to worry about unhashing the dentry, as the
1301 * lookup validation will know that the inode is bad.
1302 * (But we fall through to invalidate the caches.)
1303 */
1304 nfs_invalidate_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 return -ESTALE;
Chuck Lever325cfed2005-11-30 18:08:55 -05001306
1307 out_fileid:
1308 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1309 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
David Howells54ceac42006-08-22 20:06:13 -04001310 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
Chuck Lever325cfed2005-11-30 18:08:55 -05001311 (long long)nfsi->fileid, (long long)fattr->fileid);
1312 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313}
1314
Trond Myklebust55a97592006-06-09 09:34:19 -04001315
Linus Torvalds1da177e2005-04-16 15:20:36 -07001316#ifdef CONFIG_NFS_V4
1317
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318/*
1319 * Clean out any remaining NFSv4 state that might be left over due
1320 * to open() calls that passed nfs_atomic_lookup, but failed to call
1321 * nfs_open().
1322 */
David Howellsf7b422b2006-06-09 09:34:33 -04001323void nfs4_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001324{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 /* If we are holding a delegation, return it! */
Trond Myklebuste6f81072008-01-24 18:14:34 -05001326 nfs_inode_return_delegation_noreclaim(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 /* First call standard NFS clear_inode() code */
1328 nfs_clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330#endif
1331
David Howellsf7b422b2006-06-09 09:34:33 -04001332struct inode *nfs_alloc_inode(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333{
1334 struct nfs_inode *nfsi;
Christoph Lametere94b1762006-12-06 20:33:17 -08001335 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 if (!nfsi)
1337 return NULL;
Chuck Lever55296802005-08-18 11:24:09 -07001338 nfsi->flags = 0UL;
1339 nfsi->cache_validity = 0UL;
Trond Myklebust458818e2005-06-22 17:16:27 +00001340#ifdef CONFIG_NFS_V3_ACL
1341 nfsi->acl_access = ERR_PTR(-EAGAIN);
1342 nfsi->acl_default = ERR_PTR(-EAGAIN);
1343#endif
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00001344#ifdef CONFIG_NFS_V4
1345 nfsi->nfs4_acl = NULL;
1346#endif /* CONFIG_NFS_V4 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 return &nfsi->vfs_inode;
1348}
1349
David Howellsf7b422b2006-06-09 09:34:33 -04001350void nfs_destroy_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351{
1352 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1353}
1354
Andrew Mortond75d5412006-06-25 02:41:26 -07001355static inline void nfs4_init_once(struct nfs_inode *nfsi)
1356{
1357#ifdef CONFIG_NFS_V4
1358 INIT_LIST_HEAD(&nfsi->open_states);
1359 nfsi->delegation = NULL;
1360 nfsi->delegation_state = 0;
1361 init_rwsem(&nfsi->rwsem);
1362#endif
1363}
David Howellsf7b422b2006-06-09 09:34:33 -04001364
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001365static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366{
1367 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1368
Christoph Lametera35afb82007-05-16 22:10:57 -07001369 inode_init_once(&nfsi->vfs_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -07001370 INIT_LIST_HEAD(&nfsi->open_files);
1371 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1372 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1373 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
Christoph Lametera35afb82007-05-16 22:10:57 -07001374 nfsi->npages = 0;
Trond Myklebustff778d02010-02-19 16:53:39 -08001375 nfsi->ncommit = 0;
Trond Myklebust565277f2007-10-15 18:17:53 -04001376 atomic_set(&nfsi->silly_count, 1);
1377 INIT_HLIST_HEAD(&nfsi->silly_list);
1378 init_waitqueue_head(&nfsi->waitqueue);
Christoph Lametera35afb82007-05-16 22:10:57 -07001379 nfs4_init_once(nfsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380}
Paul Mundt20c2df82007-07-20 10:11:58 +09001381
David Howellsf7b422b2006-06-09 09:34:33 -04001382static int __init nfs_init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383{
1384 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1385 sizeof(struct nfs_inode),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001386 0, (SLAB_RECLAIM_ACCOUNT|
1387 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001388 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 if (nfs_inode_cachep == NULL)
1390 return -ENOMEM;
1391
1392 return 0;
1393}
1394
David Brownell266bee82006-06-27 12:59:15 -07001395static void nfs_destroy_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001397 kmem_cache_destroy(nfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398}
1399
Trond Myklebust57460062008-02-19 20:04:22 -05001400struct workqueue_struct *nfsiod_workqueue;
1401
1402/*
1403 * start up the nfsiod workqueue
1404 */
1405static int nfsiod_start(void)
1406{
1407 struct workqueue_struct *wq;
1408 dprintk("RPC: creating workqueue nfsiod\n");
1409 wq = create_singlethread_workqueue("nfsiod");
1410 if (wq == NULL)
1411 return -ENOMEM;
1412 nfsiod_workqueue = wq;
1413 return 0;
1414}
1415
1416/*
1417 * Destroy the nfsiod workqueue
1418 */
1419static void nfsiod_stop(void)
1420{
1421 struct workqueue_struct *wq;
1422
1423 wq = nfsiod_workqueue;
1424 if (wq == NULL)
1425 return;
1426 nfsiod_workqueue = NULL;
1427 destroy_workqueue(wq);
1428}
1429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430/*
1431 * Initialize NFS
1432 */
1433static int __init init_nfs_fs(void)
1434{
1435 int err;
1436
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001437 err = nfs_dns_resolver_init();
1438 if (err < 0)
1439 goto out8;
1440
David Howells8ec442a2009-04-03 16:42:42 +01001441 err = nfs_fscache_register();
1442 if (err < 0)
1443 goto out7;
1444
Trond Myklebust57460062008-02-19 20:04:22 -05001445 err = nfsiod_start();
1446 if (err)
1447 goto out6;
1448
David Howells6aaca562006-08-22 20:06:13 -04001449 err = nfs_fs_proc_init();
1450 if (err)
1451 goto out5;
1452
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 err = nfs_init_nfspagecache();
1454 if (err)
1455 goto out4;
1456
1457 err = nfs_init_inodecache();
1458 if (err)
1459 goto out3;
1460
1461 err = nfs_init_readpagecache();
1462 if (err)
1463 goto out2;
1464
1465 err = nfs_init_writepagecache();
1466 if (err)
1467 goto out1;
1468
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 err = nfs_init_directcache();
1470 if (err)
1471 goto out0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001472
1473#ifdef CONFIG_PROC_FS
1474 rpc_proc_register(&nfs_rpcstat);
1475#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001476 if ((err = register_nfs_fs()) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477 goto out;
1478 return 0;
1479out:
1480#ifdef CONFIG_PROC_FS
1481 rpc_proc_unregister("nfs");
1482#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 nfs_destroy_directcache();
Chuck Lever6b59a752005-11-30 18:08:19 -05001484out0:
Chuck Lever6b59a752005-11-30 18:08:19 -05001485 nfs_destroy_writepagecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001486out1:
1487 nfs_destroy_readpagecache();
1488out2:
1489 nfs_destroy_inodecache();
1490out3:
1491 nfs_destroy_nfspagecache();
1492out4:
David Howells6aaca562006-08-22 20:06:13 -04001493 nfs_fs_proc_exit();
1494out5:
Trond Myklebust57460062008-02-19 20:04:22 -05001495 nfsiod_stop();
1496out6:
David Howells8ec442a2009-04-03 16:42:42 +01001497 nfs_fscache_unregister();
1498out7:
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001499 nfs_dns_resolver_destroy();
1500out8:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501 return err;
1502}
1503
1504static void __exit exit_nfs_fs(void)
1505{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506 nfs_destroy_directcache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 nfs_destroy_writepagecache();
1508 nfs_destroy_readpagecache();
1509 nfs_destroy_inodecache();
1510 nfs_destroy_nfspagecache();
David Howells8ec442a2009-04-03 16:42:42 +01001511 nfs_fscache_unregister();
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001512 nfs_dns_resolver_destroy();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513#ifdef CONFIG_PROC_FS
1514 rpc_proc_unregister("nfs");
1515#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001516 unregister_nfs_fs();
David Howells6aaca562006-08-22 20:06:13 -04001517 nfs_fs_proc_exit();
Trond Myklebust57460062008-02-19 20:04:22 -05001518 nfsiod_stop();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519}
1520
1521/* Not quite true; I just maintain it */
1522MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1523MODULE_LICENSE("GPL");
Trond Myklebustf43bf0b2007-10-09 12:01:04 -04001524module_param(enable_ino64, bool, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001525
1526module_init(init_nfs_fs)
1527module_exit(exit_nfs_fs)