blob: d8512423ba7298ee56368fd27e42d4d01fd7cee2 [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"
Benny Halevye5e94012010-10-20 00:18:01 -040051#include "pnfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53#define NFSDBG_FACILITY NFSDBG_VFS
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040055#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
56
57/* Default is to see 64-bit inode numbers */
58static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
59
Linus Torvalds1da177e2005-04-16 15:20:36 -070060static void nfs_invalidate_inode(struct inode *);
Trond Myklebust24aa1fe2005-12-03 15:20:07 -050061static int nfs_update_inode(struct inode *, struct nfs_fattr *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
Christoph Lametere18b8902006-12-06 20:33:20 -080063static struct kmem_cache * nfs_inode_cachep;
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000064
Linus Torvalds1da177e2005-04-16 15:20:36 -070065static inline unsigned long
66nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
67{
68 return nfs_fileid_to_ino_t(fattr->fileid);
69}
70
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040071/**
Trond Myklebust72cb77f2009-03-11 14:10:30 -040072 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
73 * @word: long word containing the bit lock
74 */
75int nfs_wait_bit_killable(void *word)
76{
77 if (fatal_signal_pending(current))
78 return -ERESTARTSYS;
79 schedule();
80 return 0;
81}
82
83/**
Trond Myklebustf43bf0b2007-10-09 12:01:04 -040084 * nfs_compat_user_ino64 - returns the user-visible inode number
85 * @fileid: 64-bit fileid
86 *
87 * This function returns a 32-bit inode number if the boot parameter
88 * nfs.enable_ino64 is zero.
89 */
90u64 nfs_compat_user_ino64(u64 fileid)
91{
92 int ino;
93
94 if (enable_ino64)
95 return fileid;
96 ino = fileid;
97 if (sizeof(ino) < sizeof(fileid))
98 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
99 return ino;
100}
101
Al Virob57922d2010-06-07 14:34:48 -0400102static void nfs_clear_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103{
Trond Myklebustda6d5032006-06-01 17:26:35 -0400104 /*
105 * The following should never happen...
106 */
107 BUG_ON(nfs_have_writebacks(inode));
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400108 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
Trond Myklebustada70d92005-06-22 17:16:22 +0000109 nfs_zap_acl_cache(inode);
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400110 nfs_access_zap_cache(inode);
David Howellsef79c092009-04-03 16:42:43 +0100111 nfs_fscache_release_inode_cookie(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112}
113
Al Virob57922d2010-06-07 14:34:48 -0400114void nfs_evict_inode(struct inode *inode)
115{
116 truncate_inode_pages(&inode->i_data, 0);
117 end_writeback(inode);
118 nfs_clear_inode(inode);
119}
120
Trond Myklebust29884df2005-12-13 16:13:54 -0500121/**
122 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
123 */
124int nfs_sync_mapping(struct address_space *mapping)
125{
Trond Myklebust5cf95212010-02-19 17:03:29 -0800126 int ret = 0;
Trond Myklebust29884df2005-12-13 16:13:54 -0500127
Trond Myklebust5cf95212010-02-19 17:03:29 -0800128 if (mapping->nrpages != 0) {
129 unmap_mapping_range(mapping, 0, 0, 0);
130 ret = nfs_wb_all(mapping->host);
131 }
Trond Myklebust29884df2005-12-13 16:13:54 -0500132 return ret;
133}
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135/*
136 * Invalidate the local caches
137 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500138static void nfs_zap_caches_locked(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139{
140 struct nfs_inode *nfsi = NFS_I(inode);
141 int mode = inode->i_mode;
142
Chuck Lever91d5b472006-03-20 13:44:14 -0500143 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
144
Trond Myklebustc7c20972007-09-28 19:22:40 -0400145 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
146 nfsi->attrtimeo_timestamp = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
149 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
Chuck Lever55296802005-08-18 11:24:09 -0700150 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 -0700151 else
Chuck Lever55296802005-08-18 11:24:09 -0700152 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 -0500153}
Chuck Leverdc592502005-08-18 11:24:12 -0700154
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500155void nfs_zap_caches(struct inode *inode)
156{
157 spin_lock(&inode->i_lock);
158 nfs_zap_caches_locked(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700159 spin_unlock(&inode->i_lock);
Trond Myklebustada70d92005-06-22 17:16:22 +0000160}
161
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700162void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
163{
164 if (mapping->nrpages != 0) {
165 spin_lock(&inode->i_lock);
166 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
167 spin_unlock(&inode->i_lock);
168 }
169}
170
Trond Myklebustf41f7412008-06-11 17:39:04 -0400171void nfs_zap_acl_cache(struct inode *inode)
Trond Myklebustada70d92005-06-22 17:16:22 +0000172{
173 void (*clear_acl_cache)(struct inode *);
174
175 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
176 if (clear_acl_cache != NULL)
177 clear_acl_cache(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700178 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700179 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700180 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181}
182
Trond Myklebustc4812992007-09-28 17:11:45 -0400183void nfs_invalidate_atime(struct inode *inode)
184{
185 spin_lock(&inode->i_lock);
186 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
187 spin_unlock(&inode->i_lock);
188}
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190/*
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500191 * Invalidate, but do not unhash, the inode.
192 * NB: must be called with inode->i_lock held!
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 */
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500194static void nfs_invalidate_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Benny Halevy3a10c302008-01-23 08:58:59 +0200196 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Trond Myklebustb37b03b2005-11-25 17:10:06 -0500197 nfs_zap_caches_locked(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198}
199
200struct nfs_find_desc {
201 struct nfs_fh *fh;
202 struct nfs_fattr *fattr;
203};
204
205/*
206 * In NFSv3 we can have 64bit inode numbers. In order to support
207 * this, and re-exported directories (also seen in NFSv2)
208 * we are forced to allow 2 different inodes to have the same
209 * i_ino.
210 */
211static int
212nfs_find_actor(struct inode *inode, void *opaque)
213{
214 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
215 struct nfs_fh *fh = desc->fh;
216 struct nfs_fattr *fattr = desc->fattr;
217
218 if (NFS_FILEID(inode) != fattr->fileid)
219 return 0;
220 if (nfs_compare_fh(NFS_FH(inode), fh))
221 return 0;
222 if (is_bad_inode(inode) || NFS_STALE(inode))
223 return 0;
224 return 1;
225}
226
227static int
228nfs_init_locked(struct inode *inode, void *opaque)
229{
230 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
231 struct nfs_fattr *fattr = desc->fattr;
232
Benny Halevy99fadcd2008-01-23 08:59:08 +0200233 set_nfs_fileid(inode, fattr->fileid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 nfs_copy_fh(NFS_FH(inode), desc->fh);
235 return 0;
236}
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238/*
239 * This is our front-end to iget that looks up inodes by file handle
240 * instead of inode number.
241 */
242struct inode *
243nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
244{
245 struct nfs_find_desc desc = {
246 .fh = fh,
247 .fattr = fattr
248 };
Trond Myklebust03f28e32006-03-20 13:44:48 -0500249 struct inode *inode = ERR_PTR(-ENOENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 unsigned long hash;
251
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400252 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 goto out_no_inode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400254 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 goto out_no_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
257 hash = nfs_fattr_to_ino_t(fattr);
258
Trond Myklebust03f28e32006-03-20 13:44:48 -0500259 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
260 if (inode == NULL) {
261 inode = ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 goto out_no_inode;
Trond Myklebust03f28e32006-03-20 13:44:48 -0500263 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 if (inode->i_state & I_NEW) {
266 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800267 unsigned long now = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 /* We set i_ino for the few things that still rely on it,
270 * such as stat(2) */
271 inode->i_ino = hash;
272
273 /* We can't support update_atime(), since the server will reset it */
274 inode->i_flags |= S_NOATIME|S_NOCMTIME;
275 inode->i_mode = fattr->mode;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400276 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
277 && nfs_server_capable(inode, NFS_CAP_MODE))
278 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
279 | NFS_INO_INVALID_ACCESS
280 | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 /* Why so? Because we want revalidate for devices/FIFOs, and
282 * that's precisely what we have in nfs_file_inode_operations.
283 */
David Howells8fa5c002006-08-22 20:06:12 -0400284 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 if (S_ISREG(inode->i_mode)) {
286 inode->i_fop = &nfs_file_operations;
287 inode->i_data.a_ops = &nfs_file_aops;
288 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
289 } else if (S_ISDIR(inode->i_mode)) {
David Howells8fa5c002006-08-22 20:06:12 -0400290 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 inode->i_fop = &nfs_dir_operations;
Trond Myklebust11de3b12010-12-01 14:17:06 -0500292 inode->i_data.a_ops = &nfs_dir_aops;
Bryan Schumaker0715dc62010-09-24 18:50:01 -0400293 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
Benny Halevy3a10c302008-01-23 08:58:59 +0200294 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
Trond Myklebust55a97592006-06-09 09:34:19 -0400295 /* Deal with crossing mountpoints */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400296 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
297 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
Manoj Naik6b97fd32006-06-09 09:34:29 -0400298 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
299 inode->i_op = &nfs_referral_inode_operations;
300 else
301 inode->i_op = &nfs_mountpoint_inode_operations;
Trond Myklebust55a97592006-06-09 09:34:19 -0400302 inode->i_fop = NULL;
David Howells36d43a42011-01-14 18:45:42 +0000303 inode->i_flags |= S_AUTOMOUNT;
Trond Myklebust55a97592006-06-09 09:34:19 -0400304 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 } else if (S_ISLNK(inode->i_mode))
306 inode->i_op = &nfs_symlink_inode_operations;
307 else
308 init_special_inode(inode, inode->i_mode, fattr->rdev);
309
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400310 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
311 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
312 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
313 nfsi->change_attr = 0;
314 inode->i_size = 0;
315 inode->i_nlink = 0;
316 inode->i_uid = -2;
317 inode->i_gid = -2;
318 inode->i_blocks = 0;
319 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
320
Trond Myklebust33801142005-10-27 22:12:39 -0400321 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400322 nfsi->attr_gencount = fattr->gencount;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400323 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
324 inode->i_atime = fattr->atime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400325 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
326 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400327 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
328 inode->i_mtime = fattr->mtime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400329 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
330 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
331 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400332 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
333 inode->i_ctime = fattr->ctime;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400334 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
335 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
336 | NFS_INO_INVALID_ACCESS
337 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400338 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 nfsi->change_attr = fattr->change_attr;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400340 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
341 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
342 | NFS_INO_INVALID_DATA;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400343 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
344 inode->i_size = nfs_size_to_loff_t(fattr->size);
Trond Myklebust62ab4602009-08-09 15:06:19 -0400345 else
346 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
347 | NFS_INO_INVALID_DATA
348 | NFS_INO_REVAL_PAGECACHE;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400349 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
350 inode->i_nlink = fattr->nlink;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400351 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
352 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400353 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
354 inode->i_uid = fattr->uid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400355 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
356 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
357 | NFS_INO_INVALID_ACCESS
358 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400359 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
360 inode->i_gid = fattr->gid;
Trond Myklebust62ab4602009-08-09 15:06:19 -0400361 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
362 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
363 | NFS_INO_INVALID_ACCESS
364 | NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400365 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
366 inode->i_blocks = fattr->du.nfs2.blocks;
367 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 /*
369 * report the blocks in 512byte units
370 */
371 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 }
373 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebustb0c4fdd2007-02-05 14:44:22 -0800374 nfsi->attrtimeo_timestamp = now;
Trond Myklebust1c3c07e2006-07-25 11:28:18 -0400375 nfsi->access_cache = RB_ROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
David Howellsef79c092009-04-03 16:42:43 +0100377 nfs_fscache_init_inode_cookie(inode);
378
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 unlock_new_inode(inode);
380 } else
381 nfs_refresh_inode(inode, fattr);
382 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
383 inode->i_sb->s_id,
384 (long long)NFS_FILEID(inode),
385 atomic_read(&inode->i_count));
386
387out:
388 return inode;
389
390out_no_inode:
Trond Myklebust03f28e32006-03-20 13:44:48 -0500391 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 goto out;
393}
394
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400395#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 -0700396
397int
398nfs_setattr(struct dentry *dentry, struct iattr *attr)
399{
400 struct inode *inode = dentry->d_inode;
Trond Myklebust987f8df2010-04-16 16:22:52 -0400401 struct nfs_fattr *fattr;
402 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Chuck Lever91d5b472006-03-20 13:44:14 -0500404 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
405
Jeff Layton188b95d2007-10-18 03:05:21 -0700406 /* skip mode change if it's just for clearing setuid/setgid */
407 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
408 attr->ia_valid &= ~ATTR_MODE;
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 if (attr->ia_valid & ATTR_SIZE) {
411 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
412 attr->ia_valid &= ~ATTR_SIZE;
413 }
414
415 /* Optimization: if the end result is no change, don't RPC */
416 attr->ia_valid &= NFS_VALID_ATTRS;
Trond Myklebust659bfcd2008-06-10 19:39:41 -0400417 if ((attr->ia_valid & ~ATTR_FILE) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 return 0;
419
Trond Myklebust755c1e22006-03-20 13:44:06 -0500420 /* Write all dirty data */
Trond Myklebust1b924e52010-07-31 14:29:06 -0400421 if (S_ISREG(inode->i_mode))
Trond Myklebuste1552e12007-04-14 19:07:28 -0400422 nfs_wb_all(inode);
Trond Myklebust987f8df2010-04-16 16:22:52 -0400423
424 fattr = nfs_alloc_fattr();
425 if (fattr == NULL)
426 goto out;
Trond Myklebust642ac542005-10-18 14:20:19 -0700427 /*
428 * Return any delegations if we're going to change ACLs
429 */
430 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
431 nfs_inode_return_delegation(inode);
Trond Myklebust987f8df2010-04-16 16:22:52 -0400432 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400433 if (error == 0)
Trond Myklebust987f8df2010-04-16 16:22:52 -0400434 nfs_refresh_inode(inode, fattr);
435 nfs_free_fattr(fattr);
436out:
Trond Myklebust65e43082005-08-16 11:49:44 -0400437 return error;
438}
439
440/**
Trond Myklebusta3d01452008-06-11 12:21:19 -0400441 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
442 * @inode: inode of the file used
443 * @offset: file offset to start truncating
444 *
445 * This is a copy of the common vmtruncate, but with the locking
446 * corrected to take into account the fact that NFS requires
447 * inode->i_size to be updated under the inode->i_lock.
448 */
449static int nfs_vmtruncate(struct inode * inode, loff_t offset)
450{
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000451 loff_t oldsize;
452 int err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400453
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000454 err = inode_newsize_ok(inode, offset);
455 if (err)
456 goto out;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400457
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000458 spin_lock(&inode->i_lock);
459 oldsize = inode->i_size;
460 i_size_write(inode, offset);
461 spin_unlock(&inode->i_lock);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400462
npiggin@suse.dec08d3b02009-08-21 02:35:06 +1000463 truncate_pagecache(inode, oldsize, offset);
464out:
465 return err;
Trond Myklebusta3d01452008-06-11 12:21:19 -0400466}
467
468/**
Trond Myklebust65e43082005-08-16 11:49:44 -0400469 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
470 * @inode: pointer to struct inode
471 * @attr: pointer to struct iattr
472 *
473 * Note: we do this in the *proc.c in order to ensure that
474 * it works for things like exclusive creates too.
475 */
476void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
477{
478 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
Trond Myklebust2f28ea62008-10-05 14:26:11 -0400479 spin_lock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 if ((attr->ia_valid & ATTR_MODE) != 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -0400481 int mode = attr->ia_mode & S_IALLUGO;
482 mode |= inode->i_mode & ~S_IALLUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 inode->i_mode = mode;
484 }
485 if ((attr->ia_valid & ATTR_UID) != 0)
486 inode->i_uid = attr->ia_uid;
487 if ((attr->ia_valid & ATTR_GID) != 0)
488 inode->i_gid = attr->ia_gid;
Chuck Lever55296802005-08-18 11:24:09 -0700489 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700490 spin_unlock(&inode->i_lock);
Trond Myklebust65e43082005-08-16 11:49:44 -0400491 }
492 if ((attr->ia_valid & ATTR_SIZE) != 0) {
Chuck Lever91d5b472006-03-20 13:44:14 -0500493 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
Trond Myklebusta3d01452008-06-11 12:21:19 -0400494 nfs_vmtruncate(inode, attr->ia_size);
Trond Myklebust65e43082005-08-16 11:49:44 -0400495 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496}
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
499{
500 struct inode *inode = dentry->d_inode;
Chuck Lever55296802005-08-18 11:24:09 -0700501 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 int err;
503
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800504 /* Flush out writes to the server in order to update c/mtime. */
Chuck Lever28c494c2007-10-26 13:32:13 -0400505 if (S_ISREG(inode->i_mode)) {
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800506 err = filemap_write_and_wait(inode->i_mapping);
507 if (err)
508 goto out;
Chuck Lever28c494c2007-10-26 13:32:13 -0400509 }
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800510
511 /*
512 * We may force a getattr if the user cares about atime.
513 *
514 * Note that we only have to check the vfsmount flags here:
515 * - NFS always sets S_NOATIME by so checking it would give a
516 * bogus result
517 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
518 * no point in checking those.
519 */
520 if ((mnt->mnt_flags & MNT_NOATIME) ||
521 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 need_atime = 0;
Christoph Hellwigfc33a7b2006-01-09 20:52:17 -0800523
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 if (need_atime)
525 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
526 else
527 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
Peter Staubach4e769b92007-08-03 15:07:10 -0400528 if (!err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 generic_fillattr(inode, stat);
Trond Myklebustf43bf0b2007-10-09 12:01:04 -0400530 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
Peter Staubach4e769b92007-08-03 15:07:10 -0400531 }
Trond Myklebustacdc53b2010-02-19 17:03:26 -0800532out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return err;
534}
535
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400536static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
537{
538 atomic_set(&l_ctx->count, 1);
539 l_ctx->lockowner = current->files;
540 l_ctx->pid = current->tgid;
541 INIT_LIST_HEAD(&l_ctx->list);
542}
543
544static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
545{
546 struct nfs_lock_context *pos;
547
548 list_for_each_entry(pos, &ctx->lock_context.list, list) {
549 if (pos->lockowner != current->files)
550 continue;
551 if (pos->pid != current->tgid)
552 continue;
553 atomic_inc(&pos->count);
554 return pos;
555 }
556 return NULL;
557}
558
559struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
560{
561 struct nfs_lock_context *res, *new = NULL;
562 struct inode *inode = ctx->path.dentry->d_inode;
563
564 spin_lock(&inode->i_lock);
565 res = __nfs_find_lock_context(ctx);
566 if (res == NULL) {
567 spin_unlock(&inode->i_lock);
568 new = kmalloc(sizeof(*new), GFP_KERNEL);
569 if (new == NULL)
570 return NULL;
571 nfs_init_lock_context(new);
572 spin_lock(&inode->i_lock);
573 res = __nfs_find_lock_context(ctx);
574 if (res == NULL) {
575 list_add_tail(&new->list, &ctx->lock_context.list);
576 new->open_context = ctx;
577 res = new;
578 new = NULL;
579 }
580 }
581 spin_unlock(&inode->i_lock);
582 kfree(new);
583 return res;
584}
585
586void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
587{
588 struct nfs_open_context *ctx = l_ctx->open_context;
589 struct inode *inode = ctx->path.dentry->d_inode;
590
591 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
592 return;
593 list_del(&l_ctx->list);
594 spin_unlock(&inode->i_lock);
595 kfree(l_ctx);
596}
597
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400598/**
599 * nfs_close_context - Common close_context() routine NFSv2/v3
600 * @ctx: pointer to context
601 * @is_sync: is this a synchronous close
602 *
603 * always ensure that the attributes are up to date if we're mounted
604 * with close-to-open semantics
605 */
606void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
607{
608 struct inode *inode;
609 struct nfs_server *server;
610
611 if (!(ctx->mode & FMODE_WRITE))
612 return;
613 if (!is_sync)
614 return;
615 inode = ctx->path.dentry->d_inode;
616 if (!list_empty(&NFS_I(inode)->open_files))
617 return;
618 server = NFS_SERVER(inode);
619 if (server->flags & NFS_MOUNT_NOCTO)
620 return;
621 nfs_revalidate_inode(server, inode);
622}
623
Trond Myklebustcd9a1c02010-09-17 10:56:50 -0400624struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625{
626 struct nfs_open_context *ctx;
627
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700628 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 if (ctx != NULL) {
Al Viro6eae7972010-01-30 13:44:07 -0500630 ctx->path = *path;
631 path_get(&ctx->path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 ctx->cred = get_rpccred(cred);
633 ctx->state = NULL;
Trond Myklebustcd9a1c02010-09-17 10:56:50 -0400634 ctx->mode = f_mode;
Jeff Layton66d3aac2008-03-31 15:01:58 -0400635 ctx->flags = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 ctx->error = 0;
Olivier Galibert00a92642005-06-22 17:16:29 +0000637 ctx->dir_cookie = 0;
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400638 nfs_init_lock_context(&ctx->lock_context);
639 ctx->lock_context.open_context = ctx;
Trond Myklebust5c78f582010-09-27 15:51:20 -0400640 INIT_LIST_HEAD(&ctx->list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 }
642 return ctx;
643}
644
645struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
646{
647 if (ctx != NULL)
Trond Myklebustf11ac8d2010-06-25 16:35:53 -0400648 atomic_inc(&ctx->lock_context.count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 return ctx;
650}
651
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400652static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400653{
Trond Myklebust7fe5c392009-03-19 15:35:50 -0400654 struct inode *inode = ctx->path.dentry->d_inode;
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400655
Trond Myklebust5c78f582010-09-27 15:51:20 -0400656 if (!list_empty(&ctx->list)) {
Benny Halevyef843032010-09-23 12:22:09 -0400657 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
658 return;
659 list_del(&ctx->list);
660 spin_unlock(&inode->i_lock);
Benny Halevyef843032010-09-23 12:22:09 -0400661 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
Trond Myklebust5e119342007-07-26 12:06:17 -0400662 return;
Trond Myklebust5c78f582010-09-27 15:51:20 -0400663 if (inode != NULL)
664 NFS_PROTO(inode)->close_context(ctx, is_sync);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400665 if (ctx->cred != NULL)
666 put_rpccred(ctx->cred);
Jan Blunck31f31db12008-05-02 13:42:45 -0700667 path_put(&ctx->path);
Trond Myklebust3bec63d2007-06-17 16:02:44 -0400668 kfree(ctx);
669}
670
Trond Myklebusta49c3c72007-10-18 18:03:27 -0400671void put_nfs_open_context(struct nfs_open_context *ctx)
672{
673 __put_nfs_open_context(ctx, 0);
674}
675
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676/*
677 * Ensure that mmap has a recent RPC credential for use when writing out
678 * shared pages
679 */
Trond Myklebustcd9a1c02010-09-17 10:56:50 -0400680void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800682 struct inode *inode = filp->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 struct nfs_inode *nfsi = NFS_I(inode);
684
685 filp->private_data = get_nfs_open_context(ctx);
686 spin_lock(&inode->i_lock);
687 list_add(&ctx->list, &nfsi->open_files);
688 spin_unlock(&inode->i_lock);
689}
690
Trond Myklebustd5308382005-11-04 15:33:38 -0500691/*
692 * Given an inode, search for an open context with the desired characteristics
693 */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500694struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695{
696 struct nfs_inode *nfsi = NFS_I(inode);
697 struct nfs_open_context *pos, *ctx = NULL;
698
699 spin_lock(&inode->i_lock);
700 list_for_each_entry(pos, &nfsi->open_files, list) {
Trond Myklebustd5308382005-11-04 15:33:38 -0500701 if (cred != NULL && pos->cred != cred)
702 continue;
Trond Myklebust1544fa02010-03-25 13:54:49 -0400703 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
704 continue;
705 ctx = get_nfs_open_context(pos);
706 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 }
708 spin_unlock(&inode->i_lock);
709 return ctx;
710}
711
Trond Myklebustb92dccf2006-03-20 13:44:03 -0500712static void nfs_file_clear_open_context(struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
Josef "Jeff" Sipek01cce932006-12-08 02:36:40 -0800714 struct inode *inode = filp->f_path.dentry->d_inode;
Trond Myklebustcd3758e2007-08-10 17:44:32 -0400715 struct nfs_open_context *ctx = nfs_file_open_context(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717 if (ctx) {
718 filp->private_data = NULL;
719 spin_lock(&inode->i_lock);
720 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
721 spin_unlock(&inode->i_lock);
Chuck Leverf895c532010-02-01 14:17:50 -0500722 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 }
724}
725
726/*
727 * These allocate and release file read/write context information.
728 */
729int nfs_open(struct inode *inode, struct file *filp)
730{
731 struct nfs_open_context *ctx;
732 struct rpc_cred *cred;
733
Trond Myklebust98a8e322008-03-12 12:25:28 -0400734 cred = rpc_lookup_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 if (IS_ERR(cred))
736 return PTR_ERR(cred);
Trond Myklebustcd9a1c02010-09-17 10:56:50 -0400737 ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 put_rpccred(cred);
739 if (ctx == NULL)
740 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 nfs_file_set_open_context(filp, ctx);
742 put_nfs_open_context(ctx);
David Howellsef79c092009-04-03 16:42:43 +0100743 nfs_fscache_set_inode_cookie(inode, filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 return 0;
745}
746
747int nfs_release(struct inode *inode, struct file *filp)
748{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 nfs_file_clear_open_context(filp);
750 return 0;
751}
752
753/*
754 * This function is called whenever some part of NFS notices that
755 * the cached attributes have to be refreshed.
756 */
757int
758__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
759{
760 int status = -ESTALE;
Trond Myklebusta3cba2a2010-04-16 16:22:49 -0400761 struct nfs_fattr *fattr = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 struct nfs_inode *nfsi = NFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
765 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
766
Chuck Lever85233a72006-10-19 23:28:42 -0700767 if (is_bad_inode(inode))
Chuck Lever412d5822005-08-18 11:24:11 -0700768 goto out;
Trond Myklebust7fdc49c2007-09-28 19:11:33 -0400769 if (NFS_STALE(inode))
770 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
Trond Myklebusta3cba2a2010-04-16 16:22:49 -0400772 status = -ENOMEM;
773 fattr = nfs_alloc_fattr();
774 if (fattr == NULL)
775 goto out;
776
Trond Myklebust691beb12008-10-05 14:48:22 -0400777 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
Trond Myklebusta3cba2a2010-04-16 16:22:49 -0400778 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (status != 0) {
780 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
781 inode->i_sb->s_id,
782 (long long)NFS_FILEID(inode), status);
783 if (status == -ESTALE) {
784 nfs_zap_caches(inode);
785 if (!S_ISDIR(inode->i_mode))
Benny Halevy3a10c302008-01-23 08:58:59 +0200786 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 }
788 goto out;
789 }
790
Trond Myklebusta3cba2a2010-04-16 16:22:49 -0400791 status = nfs_refresh_inode(inode, fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 if (status) {
793 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
794 inode->i_sb->s_id,
795 (long long)NFS_FILEID(inode), status);
796 goto out;
797 }
Chuck Lever55296802005-08-18 11:24:09 -0700798
Trond Myklebust24aa1fe2005-12-03 15:20:07 -0500799 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
Trond Myklebustada70d92005-06-22 17:16:22 +0000800 nfs_zap_acl_cache(inode);
Chuck Lever55296802005-08-18 11:24:09 -0700801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
803 inode->i_sb->s_id,
804 (long long)NFS_FILEID(inode));
805
Chuck Lever412d5822005-08-18 11:24:11 -0700806 out:
Trond Myklebusta3cba2a2010-04-16 16:22:49 -0400807 nfs_free_fattr(fattr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return status;
809}
810
811int nfs_attribute_timeout(struct inode *inode)
812{
813 struct nfs_inode *nfsi = NFS_I(inode);
814
Trond Myklebustd7cf8dd2010-04-16 16:42:46 -0400815 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
816}
817
818static int nfs_attribute_cache_expired(struct inode *inode)
819{
Trond Myklebustb4d23142010-03-10 15:21:44 -0500820 if (nfs_have_delegated_attributes(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 return 0;
Trond Myklebustd7cf8dd2010-04-16 16:42:46 -0400822 return nfs_attribute_timeout(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823}
824
825/**
826 * nfs_revalidate_inode - Revalidate the inode attributes
827 * @server - pointer to nfs_server struct
828 * @inode - pointer to inode struct
829 *
830 * Updates inode attribute information by retrieving the data from the server.
831 */
832int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
833{
Trond Myklebust44b11872006-05-25 01:40:59 -0400834 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
Trond Myklebustd7cf8dd2010-04-16 16:42:46 -0400835 && !nfs_attribute_cache_expired(inode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 return NFS_STALE(inode) ? -ESTALE : 0;
837 return __nfs_revalidate_inode(server, inode);
838}
839
Trond Myklebust1cda7072010-02-19 17:03:30 -0800840static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust717d44e2007-01-24 11:54:55 -0800841{
842 struct nfs_inode *nfsi = NFS_I(inode);
843
844 if (mapping->nrpages != 0) {
845 int ret = invalidate_inode_pages2(mapping);
846 if (ret < 0)
847 return ret;
848 }
849 spin_lock(&inode->i_lock);
850 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
Trond Myklebust2f78e432007-09-30 15:31:19 -0400851 if (S_ISDIR(inode->i_mode))
Trond Myklebust717d44e2007-01-24 11:54:55 -0800852 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
Trond Myklebust717d44e2007-01-24 11:54:55 -0800853 spin_unlock(&inode->i_lock);
854 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
David Howellsef79c092009-04-03 16:42:43 +0100855 nfs_fscache_reset_inode_cookie(inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800856 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
857 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
858 return 0;
859}
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861/**
Trond Myklebust7d52e862005-06-22 17:16:30 +0000862 * nfs_revalidate_mapping - Revalidate the pagecache
863 * @inode - pointer to host inode
864 * @mapping - pointer to mapping
865 */
Trond Myklebust44b11872006-05-25 01:40:59 -0400866int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
Trond Myklebust7d52e862005-06-22 17:16:30 +0000867{
868 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust44b11872006-05-25 01:40:59 -0400869 int ret = 0;
870
Trond Myklebust44b11872006-05-25 01:40:59 -0400871 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
Trond Myklebustd7cf8dd2010-04-16 16:42:46 -0400872 || nfs_attribute_cache_expired(inode)
873 || NFS_STALE(inode)) {
Trond Myklebust44b11872006-05-25 01:40:59 -0400874 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
Trond Myklebust717d44e2007-01-24 11:54:55 -0800875 if (ret < 0)
876 goto out;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000877 }
Trond Myklebust717d44e2007-01-24 11:54:55 -0800878 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
879 ret = nfs_invalidate_mapping(inode, mapping);
Trond Myklebustcd9ae2b2006-10-19 23:28:40 -0700880out:
Trond Myklebust44b11872006-05-25 01:40:59 -0400881 return ret;
Trond Myklebust7d52e862005-06-22 17:16:30 +0000882}
883
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100884static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
885{
886 struct nfs_inode *nfsi = NFS_I(inode);
887
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400888 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
889 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
890 && nfsi->change_attr == fattr->pre_change_attr) {
Trond Myklebust70ca8852007-09-30 15:21:24 -0400891 nfsi->change_attr = fattr->change_attr;
892 if (S_ISDIR(inode->i_mode))
893 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
894 }
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100895 /* If we have atomic WCC data, we may update some attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400896 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
897 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
898 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100899 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400900
901 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
902 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
903 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100904 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebuste323ea42007-09-30 17:03:25 -0400905 if (S_ISDIR(inode->i_mode))
906 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100907 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400908 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
909 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
910 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
911 && nfsi->npages == 0)
912 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
Trond Myklebusta895b4a2006-01-03 09:55:40 +0100913}
914
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915/**
Trond Myklebust33801142005-10-27 22:12:39 -0400916 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 * @inode - pointer to inode
918 * @fattr - updated attributes
919 *
920 * Verifies the attribute cache. If we have just changed the attributes,
921 * so that fattr carries weak cache consistency data, then it may
922 * also update the ctime/mtime/change_attribute.
923 */
Trond Myklebust33801142005-10-27 22:12:39 -0400924static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925{
926 struct nfs_inode *nfsi = NFS_I(inode);
927 loff_t cur_size, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400928 unsigned long invalid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Chuck Leverdc592502005-08-18 11:24:12 -0700930
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 /* Has the inode gone and changed behind our back? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400932 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 return -EIO;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400934 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
935 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400937 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
Trond Myklebustf1bb0b92006-05-25 01:40:55 -0400938 nfsi->change_attr != fattr->change_attr)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400939 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 /* Verify a few of the more important attributes */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400942 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400943 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
Trond Myklebustca62b9c2006-03-20 13:44:07 -0500944
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400945 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
946 cur_size = i_size_read(inode);
947 new_isize = nfs_size_to_loff_t(fattr->size);
948 if (cur_size != new_isize && nfsi->npages == 0)
949 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
950 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951
952 /* Have any file permissions changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400953 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
954 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
955 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
956 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
957 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400958 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
960 /* Has the link count changed? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400961 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400962 invalid |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400964 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -0400965 invalid |= NFS_INO_INVALID_ATIME;
966
967 if (invalid != 0)
968 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
Trond Myklebust33801142005-10-27 22:12:39 -0400970 nfsi->read_cache_jiffies = fattr->time_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 return 0;
972}
973
Trond Myklebusta10ad172008-09-23 17:28:41 -0400974static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
975{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400976 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
977 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400978 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
979}
980
981static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
982{
Trond Myklebust9e6e70f2009-03-11 14:10:24 -0400983 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
984 return 0;
Trond Myklebusta10ad172008-09-23 17:28:41 -0400985 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
986}
987
Trond Myklebustae05f262008-10-28 15:21:40 -0400988static atomic_long_t nfs_attr_generation_counter;
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400989
990static unsigned long nfs_read_attr_generation_counter(void)
991{
Trond Myklebustae05f262008-10-28 15:21:40 -0400992 return atomic_long_read(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400993}
994
995unsigned long nfs_inc_attr_generation_counter(void)
996{
Trond Myklebustae05f262008-10-28 15:21:40 -0400997 return atomic_long_inc_return(&nfs_attr_generation_counter);
Trond Myklebust4704f0e2008-10-14 19:16:07 -0400998}
999
1000void nfs_fattr_init(struct nfs_fattr *fattr)
1001{
1002 fattr->valid = 0;
1003 fattr->time_start = jiffies;
1004 fattr->gencount = nfs_inc_attr_generation_counter();
1005}
1006
Trond Myklebust2d36bfde2010-04-16 16:22:45 -04001007struct nfs_fattr *nfs_alloc_fattr(void)
1008{
1009 struct nfs_fattr *fattr;
1010
1011 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1012 if (fattr != NULL)
1013 nfs_fattr_init(fattr);
1014 return fattr;
1015}
1016
1017struct nfs_fh *nfs_alloc_fhandle(void)
1018{
1019 struct nfs_fh *fh;
1020
1021 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1022 if (fh != NULL)
1023 fh->size = 0;
1024 return fh;
1025}
1026
Trond Myklebusta10ad172008-09-23 17:28:41 -04001027/**
1028 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1029 * @inode - pointer to inode
1030 * @fattr - attributes
1031 *
1032 * Attempt to divine whether or not an RPC call reply carrying stale
1033 * attributes got scheduled after another call carrying updated ones.
1034 *
1035 * To do so, the function first assumes that a more recent ctime means
1036 * that the attributes in fattr are newer, however it also attempt to
1037 * catch the case where ctime either didn't change, or went backwards
1038 * (if someone reset the clock on the server) by looking at whether
1039 * or not this RPC call was started after the inode was last updated.
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001040 * Note also the check for wraparound of 'attr_gencount'
Trond Myklebusta10ad172008-09-23 17:28:41 -04001041 *
1042 * The function returns 'true' if it thinks the attributes in 'fattr' are
1043 * more recent than the ones cached in the inode.
1044 *
1045 */
1046static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1047{
1048 const struct nfs_inode *nfsi = NFS_I(inode);
1049
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001050 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
Trond Myklebust03254e62008-10-09 13:27:55 -04001051 nfs_ctime_need_update(inode, fattr) ||
1052 nfs_size_need_update(inode, fattr) ||
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001053 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
Trond Myklebusta10ad172008-09-23 17:28:41 -04001054}
1055
Trond Myklebust870a5be2008-10-05 12:07:23 -04001056static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1057{
Trond Myklebusta10ad172008-09-23 17:28:41 -04001058 if (nfs_inode_attrs_need_update(inode, fattr))
Trond Myklebust870a5be2008-10-05 12:07:23 -04001059 return nfs_update_inode(inode, fattr);
1060 return nfs_check_inode_attributes(inode, fattr);
1061}
1062
Trond Myklebust33801142005-10-27 22:12:39 -04001063/**
1064 * nfs_refresh_inode - try to update the inode attribute cache
1065 * @inode - pointer to inode
1066 * @fattr - updated attributes
1067 *
1068 * Check that an RPC call that returned attributes has not overlapped with
1069 * other recent updates of the inode metadata, then decide whether it is
1070 * safe to do a full update of the inode attributes, or whether just to
1071 * call nfs_check_inode_attributes.
1072 */
1073int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1074{
Trond Myklebust33801142005-10-27 22:12:39 -04001075 int status;
1076
1077 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1078 return 0;
1079 spin_lock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001080 status = nfs_refresh_inode_locked(inode, fattr);
Trond Myklebust33801142005-10-27 22:12:39 -04001081 spin_unlock(&inode->i_lock);
David Howellsef79c092009-04-03 16:42:43 +01001082
Trond Myklebust33801142005-10-27 22:12:39 -04001083 return status;
1084}
1085
Trond Myklebustd65f5572008-10-05 12:27:55 -04001086static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1087{
1088 struct nfs_inode *nfsi = NFS_I(inode);
1089
1090 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1091 if (S_ISDIR(inode->i_mode))
1092 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1093 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1094 return 0;
1095 return nfs_refresh_inode_locked(inode, fattr);
1096}
1097
Trond Myklebustdecf4912005-10-27 22:12:39 -04001098/**
1099 * nfs_post_op_update_inode - try to update the inode attribute cache
1100 * @inode - pointer to inode
1101 * @fattr - updated attributes
1102 *
1103 * After an operation that has changed the inode metadata, mark the
1104 * attribute cache as being invalid, then try to update it.
Chuck Leverf551e442006-09-20 14:33:04 -04001105 *
1106 * NB: if the server didn't return any post op attributes, this
1107 * function will force the retrieval of attributes before the next
1108 * NFS request. Thus it should be used only for operations that
1109 * are expected to change one or more attributes, to avoid
1110 * unnecessary NFS requests and trips through nfs_update_inode().
Trond Myklebustdecf4912005-10-27 22:12:39 -04001111 */
1112int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1113{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001114 int status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001115
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001116 spin_lock(&inode->i_lock);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001117 status = nfs_post_op_update_inode_locked(inode, fattr);
Trond Myklebust7668fdb2007-10-01 09:59:15 -04001118 spin_unlock(&inode->i_lock);
Trond Myklebust870a5be2008-10-05 12:07:23 -04001119 return status;
Trond Myklebustdecf4912005-10-27 22:12:39 -04001120}
1121
Trond Myklebust70ca8852007-09-30 15:21:24 -04001122/**
1123 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1124 * @inode - pointer to inode
1125 * @fattr - updated attributes
1126 *
1127 * After an operation that has changed the inode metadata, mark the
1128 * attribute cache as being invalid, then try to update it. Fake up
1129 * weak cache consistency data, if none exist.
1130 *
1131 * This function is mainly designed to be used by the ->write_done() functions.
1132 */
1133int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1134{
Trond Myklebustd65f5572008-10-05 12:27:55 -04001135 int status;
1136
1137 spin_lock(&inode->i_lock);
1138 /* Don't do a WCC update if these attributes are already stale */
1139 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1140 !nfs_inode_attrs_need_update(inode, fattr)) {
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001141 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1142 | NFS_ATTR_FATTR_PRESIZE
1143 | NFS_ATTR_FATTR_PREMTIME
1144 | NFS_ATTR_FATTR_PRECTIME);
Trond Myklebustd65f5572008-10-05 12:27:55 -04001145 goto out_noforce;
1146 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001147 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1148 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001149 fattr->pre_change_attr = NFS_I(inode)->change_attr;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001150 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001151 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001152 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1153 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001154 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001155 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1156 }
1157 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1158 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
Trond Myklebust70ca8852007-09-30 15:21:24 -04001159 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001160 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1161 }
1162 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1163 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
Trond Myklebusta3d01452008-06-11 12:21:19 -04001164 fattr->pre_size = i_size_read(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001165 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001166 }
Trond Myklebustd65f5572008-10-05 12:27:55 -04001167out_noforce:
1168 status = nfs_post_op_update_inode_locked(inode, fattr);
1169 spin_unlock(&inode->i_lock);
1170 return status;
Trond Myklebust70ca8852007-09-30 15:21:24 -04001171}
1172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173/*
1174 * Many nfs protocol calls return the new file attributes after
1175 * an operation. Here we update the inode to reflect the state
1176 * of the server's inode.
1177 *
1178 * This is a bit tricky because we have to make sure all dirty pages
1179 * have been sent off to the server before calling invalidate_inode_pages.
1180 * To make sure no other process adds more write requests while we try
1181 * our best to flush them, we make them sleep during the attribute refresh.
1182 *
1183 * A very similar scenario holds for the dir cache.
1184 */
Trond Myklebust24aa1fe2005-12-03 15:20:07 -05001185static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186{
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001187 struct nfs_server *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001189 loff_t cur_isize, new_isize;
Trond Myklebust2a3f5fd2007-10-08 14:26:13 -04001190 unsigned long invalid = 0;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001191 unsigned long now = jiffies;
Trond Myklebust62ab4602009-08-09 15:06:19 -04001192 unsigned long save_cache_validity;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001193
1194 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001195 __func__, inode->i_sb->s_id, inode->i_ino,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 atomic_read(&inode->i_count), fattr->valid);
1197
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001198 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
Chuck Lever325cfed2005-11-30 18:08:55 -05001199 goto out_fileid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201 /*
1202 * Make sure the inode's type hasn't changed.
1203 */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001204 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 goto out_changed;
1206
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001207 server = NFS_SERVER(inode);
Trond Myklebusta0356862007-06-05 13:26:15 -04001208 /* Update the fsid? */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001209 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
Trond Myklebustc37dcd332008-03-06 12:34:50 -05001210 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
David Howells36d43a42011-01-14 18:45:42 +00001211 !IS_AUTOMOUNT(inode))
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -04001212 server->fsid = fattr->fsid;
1213
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 /*
1215 * Update the read time so we don't revalidate too often.
1216 */
Trond Myklebust33801142005-10-27 22:12:39 -04001217 nfsi->read_cache_jiffies = fattr->time_start;
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001218
Trond Myklebust62ab4602009-08-09 15:06:19 -04001219 save_cache_validity = nfsi->cache_validity;
1220 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1221 | NFS_INO_INVALID_ATIME
1222 | NFS_INO_REVAL_FORCED
1223 | NFS_INO_REVAL_PAGECACHE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224
Trond Myklebusta895b4a2006-01-03 09:55:40 +01001225 /* Do atomic weak cache consistency updates */
1226 nfs_wcc_update_inode(inode, fattr);
1227
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001228 /* More cache consistency checks */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001229 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1230 if (nfsi->change_attr != fattr->change_attr) {
1231 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1232 inode->i_sb->s_id, inode->i_ino);
1233 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1234 if (S_ISDIR(inode->i_mode))
1235 nfs_force_lookup_revalidate(inode);
1236 nfsi->change_attr = fattr->change_attr;
1237 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001238 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1239 invalid |= save_cache_validity;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001240
1241 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001242 /* NFSv2/v3: Check if the mtime agrees */
1243 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1244 dprintk("NFS: mtime change on server for file %s/%ld\n",
1245 inode->i_sb->s_id, inode->i_ino);
1246 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
Trond Myklebustbfc69a42007-10-15 18:18:29 -04001247 if (S_ISDIR(inode->i_mode))
1248 nfs_force_lookup_revalidate(inode);
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001249 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001250 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001251 } else if (server->caps & NFS_CAP_MTIME)
1252 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1253 | NFS_INO_INVALID_DATA
1254 | NFS_INO_REVAL_PAGECACHE
1255 | NFS_INO_REVAL_FORCED);
1256
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001257 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001258 /* If ctime has changed we should definitely clear access+acl caches */
NeilBrown37d9d762009-03-11 14:10:23 -04001259 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001260 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
NeilBrown37d9d762009-03-11 14:10:23 -04001261 /* and probably clear data for a directory too as utimes can cause
1262 * havoc with our cache.
1263 */
1264 if (S_ISDIR(inode->i_mode)) {
1265 invalid |= NFS_INO_INVALID_DATA;
1266 nfs_force_lookup_revalidate(inode);
1267 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001268 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
NeilBrown37d9d762009-03-11 14:10:23 -04001269 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001270 } else if (server->caps & NFS_CAP_CTIME)
1271 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1272 | NFS_INO_INVALID_ACCESS
1273 | NFS_INO_INVALID_ACL
1274 | NFS_INO_REVAL_FORCED);
Trond Myklebust47aabaa2007-09-27 15:57:24 -04001275
Trond Myklebust951a1432005-06-22 17:16:30 +00001276 /* Check if our cached file size is stale */
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001277 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1278 new_isize = nfs_size_to_loff_t(fattr->size);
1279 cur_isize = i_size_read(inode);
1280 if (new_isize != cur_isize) {
1281 /* Do we perhaps have any outstanding writes, or has
1282 * the file grown beyond our last write? */
1283 if (nfsi->npages == 0 || new_isize > cur_isize) {
1284 i_size_write(inode, new_isize);
1285 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1286 }
1287 dprintk("NFS: isize change on server for file %s/%ld\n",
1288 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001290 } else
1291 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1292 | NFS_INO_REVAL_PAGECACHE
1293 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001296 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1297 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
Trond Myklebust62ab4602009-08-09 15:06:19 -04001298 else if (server->caps & NFS_CAP_ATIME)
1299 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1300 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001302 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1303 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
Trond Myklebust9b4b3512010-02-03 08:27:35 -05001304 umode_t newmode = inode->i_mode & S_IFMT;
1305 newmode |= fattr->mode & S_IALLUGO;
1306 inode->i_mode = newmode;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001307 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001308 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001309 } else if (server->caps & NFS_CAP_MODE)
1310 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1311 | NFS_INO_INVALID_ACCESS
1312 | NFS_INO_INVALID_ACL
1313 | NFS_INO_REVAL_FORCED);
1314
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001315 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1316 if (inode->i_uid != fattr->uid) {
1317 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1318 inode->i_uid = fattr->uid;
1319 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001320 } else if (server->caps & NFS_CAP_OWNER)
1321 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1322 | NFS_INO_INVALID_ACCESS
1323 | NFS_INO_INVALID_ACL
1324 | NFS_INO_REVAL_FORCED);
1325
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001326 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1327 if (inode->i_gid != fattr->gid) {
1328 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1329 inode->i_gid = fattr->gid;
1330 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001331 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1332 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1333 | NFS_INO_INVALID_ACCESS
1334 | NFS_INO_INVALID_ACL
1335 | NFS_INO_REVAL_FORCED);
Trond Myklebust921615f2008-10-14 19:23:07 -04001336
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001337 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1338 if (inode->i_nlink != fattr->nlink) {
1339 invalid |= NFS_INO_INVALID_ATTR;
1340 if (S_ISDIR(inode->i_mode))
1341 invalid |= NFS_INO_INVALID_DATA;
1342 inode->i_nlink = fattr->nlink;
1343 }
Trond Myklebust62ab4602009-08-09 15:06:19 -04001344 } else if (server->caps & NFS_CAP_NLINK)
1345 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1346 | NFS_INO_REVAL_FORCED);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001348 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 /*
1350 * report the blocks in 512byte units
1351 */
1352 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 }
Trond Myklebust9e6e70f2009-03-11 14:10:24 -04001354 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1355 inode->i_blocks = fattr->du.nfs2.blocks;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
1357 /* Update attrtimeo value if we're out of the unstable period */
1358 if (invalid & NFS_INO_INVALID_ATTR) {
Chuck Lever91d5b472006-03-20 13:44:14 -05001359 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
Trond Myklebust3e7d9502007-02-05 14:26:28 -08001361 nfsi->attrtimeo_timestamp = now;
Trond Myklebust4704f0e2008-10-14 19:16:07 -04001362 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001363 } else {
Peter Staubach64672d52008-12-23 15:21:56 -05001364 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
Trond Myklebust6d2b2962007-10-01 18:57:50 -04001365 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1366 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1367 nfsi->attrtimeo_timestamp = now;
1368 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 }
Trond Myklebustf2115dc2007-08-15 12:49:17 -04001370 invalid &= ~NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371 /* Don't invalidate the data if we were to blame */
1372 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1373 || S_ISLNK(inode->i_mode)))
1374 invalid &= ~NFS_INO_INVALID_DATA;
Trond Myklebust412c77c2007-07-03 16:10:55 -04001375 if (!nfs_have_delegation(inode, FMODE_READ) ||
Trond Myklebust62ab4602009-08-09 15:06:19 -04001376 (save_cache_validity & NFS_INO_REVAL_FORCED))
Chuck Lever55296802005-08-18 11:24:09 -07001377 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378
1379 return 0;
1380 out_changed:
1381 /*
1382 * Big trouble! The inode has become a different object.
1383 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
Harvey Harrison3110ff82008-05-02 13:42:44 -07001385 __func__, inode->i_ino, inode->i_mode, fattr->mode);
Trond Myklebustb37b03b2005-11-25 17:10:06 -05001386 out_err:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 /*
1388 * No need to worry about unhashing the dentry, as the
1389 * lookup validation will know that the inode is bad.
1390 * (But we fall through to invalidate the caches.)
1391 */
1392 nfs_invalidate_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 return -ESTALE;
Chuck Lever325cfed2005-11-30 18:08:55 -05001394
1395 out_fileid:
1396 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1397 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
David Howells54ceac42006-08-22 20:06:13 -04001398 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
Chuck Lever325cfed2005-11-30 18:08:55 -05001399 (long long)nfsi->fileid, (long long)fattr->fileid);
1400 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401}
1402
Trond Myklebust55a97592006-06-09 09:34:19 -04001403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404#ifdef CONFIG_NFS_V4
1405
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406/*
1407 * Clean out any remaining NFSv4 state that might be left over due
1408 * to open() calls that passed nfs_atomic_lookup, but failed to call
1409 * nfs_open().
1410 */
Al Virob57922d2010-06-07 14:34:48 -04001411void nfs4_evict_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412{
Fred Isaman4541d162011-01-06 11:36:23 +00001413 pnfs_destroy_layout(NFS_I(inode));
Al Virob57922d2010-06-07 14:34:48 -04001414 truncate_inode_pages(&inode->i_data, 0);
1415 end_writeback(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 /* If we are holding a delegation, return it! */
Trond Myklebuste6f81072008-01-24 18:14:34 -05001417 nfs_inode_return_delegation_noreclaim(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 /* First call standard NFS clear_inode() code */
1419 nfs_clear_inode(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421#endif
1422
David Howellsf7b422b2006-06-09 09:34:33 -04001423struct inode *nfs_alloc_inode(struct super_block *sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424{
1425 struct nfs_inode *nfsi;
Christoph Lametere94b1762006-12-06 20:33:17 -08001426 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 if (!nfsi)
1428 return NULL;
Chuck Lever55296802005-08-18 11:24:09 -07001429 nfsi->flags = 0UL;
1430 nfsi->cache_validity = 0UL;
Trond Myklebust458818e2005-06-22 17:16:27 +00001431#ifdef CONFIG_NFS_V3_ACL
1432 nfsi->acl_access = ERR_PTR(-EAGAIN);
1433 nfsi->acl_default = ERR_PTR(-EAGAIN);
1434#endif
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00001435#ifdef CONFIG_NFS_V4
1436 nfsi->nfs4_acl = NULL;
1437#endif /* CONFIG_NFS_V4 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 return &nfsi->vfs_inode;
1439}
1440
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +11001441static void nfs_i_callback(struct rcu_head *head)
1442{
1443 struct inode *inode = container_of(head, struct inode, i_rcu);
1444 INIT_LIST_HEAD(&inode->i_dentry);
1445 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1446}
1447
David Howellsf7b422b2006-06-09 09:34:33 -04001448void nfs_destroy_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +11001450 call_rcu(&inode->i_rcu, nfs_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001451}
1452
Andrew Mortond75d5412006-06-25 02:41:26 -07001453static inline void nfs4_init_once(struct nfs_inode *nfsi)
1454{
1455#ifdef CONFIG_NFS_V4
1456 INIT_LIST_HEAD(&nfsi->open_states);
1457 nfsi->delegation = NULL;
1458 nfsi->delegation_state = 0;
1459 init_rwsem(&nfsi->rwsem);
Benny Halevye5e94012010-10-20 00:18:01 -04001460 nfsi->layout = NULL;
Andrew Mortond75d5412006-06-25 02:41:26 -07001461#endif
1462}
David Howellsf7b422b2006-06-09 09:34:33 -04001463
Alexey Dobriyan51cc5062008-07-25 19:45:34 -07001464static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465{
1466 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1467
Christoph Lametera35afb82007-05-16 22:10:57 -07001468 inode_init_once(&nfsi->vfs_inode);
Christoph Lametera35afb82007-05-16 22:10:57 -07001469 INIT_LIST_HEAD(&nfsi->open_files);
1470 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1471 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1472 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
Christoph Lametera35afb82007-05-16 22:10:57 -07001473 nfsi->npages = 0;
Trond Myklebustff778d02010-02-19 16:53:39 -08001474 nfsi->ncommit = 0;
Trond Myklebust565277f2007-10-15 18:17:53 -04001475 atomic_set(&nfsi->silly_count, 1);
1476 INIT_HLIST_HEAD(&nfsi->silly_list);
1477 init_waitqueue_head(&nfsi->waitqueue);
Christoph Lametera35afb82007-05-16 22:10:57 -07001478 nfs4_init_once(nfsi);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479}
Paul Mundt20c2df82007-07-20 10:11:58 +09001480
David Howellsf7b422b2006-06-09 09:34:33 -04001481static int __init nfs_init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482{
1483 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1484 sizeof(struct nfs_inode),
Paul Jacksonfffb60f2006-03-24 03:16:06 -08001485 0, (SLAB_RECLAIM_ACCOUNT|
1486 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +09001487 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 if (nfs_inode_cachep == NULL)
1489 return -ENOMEM;
1490
1491 return 0;
1492}
1493
David Brownell266bee82006-06-27 12:59:15 -07001494static void nfs_destroy_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001496 kmem_cache_destroy(nfs_inode_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497}
1498
Trond Myklebust57460062008-02-19 20:04:22 -05001499struct workqueue_struct *nfsiod_workqueue;
1500
1501/*
1502 * start up the nfsiod workqueue
1503 */
1504static int nfsiod_start(void)
1505{
1506 struct workqueue_struct *wq;
1507 dprintk("RPC: creating workqueue nfsiod\n");
Trond Myklebust60958892010-09-21 16:55:31 -04001508 wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
Trond Myklebust57460062008-02-19 20:04:22 -05001509 if (wq == NULL)
1510 return -ENOMEM;
1511 nfsiod_workqueue = wq;
1512 return 0;
1513}
1514
1515/*
1516 * Destroy the nfsiod workqueue
1517 */
1518static void nfsiod_stop(void)
1519{
1520 struct workqueue_struct *wq;
1521
1522 wq = nfsiod_workqueue;
1523 if (wq == NULL)
1524 return;
1525 nfsiod_workqueue = NULL;
1526 destroy_workqueue(wq);
1527}
1528
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529/*
1530 * Initialize NFS
1531 */
1532static int __init init_nfs_fs(void)
1533{
1534 int err;
1535
Bryan Schumaker955a8572010-09-29 15:41:49 -04001536 err = nfs_idmap_init();
1537 if (err < 0)
1538 goto out9;
1539
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001540 err = nfs_dns_resolver_init();
1541 if (err < 0)
1542 goto out8;
1543
David Howells8ec442a2009-04-03 16:42:42 +01001544 err = nfs_fscache_register();
1545 if (err < 0)
1546 goto out7;
1547
Trond Myklebust57460062008-02-19 20:04:22 -05001548 err = nfsiod_start();
1549 if (err)
1550 goto out6;
1551
David Howells6aaca562006-08-22 20:06:13 -04001552 err = nfs_fs_proc_init();
1553 if (err)
1554 goto out5;
1555
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 err = nfs_init_nfspagecache();
1557 if (err)
1558 goto out4;
1559
1560 err = nfs_init_inodecache();
1561 if (err)
1562 goto out3;
1563
1564 err = nfs_init_readpagecache();
1565 if (err)
1566 goto out2;
1567
1568 err = nfs_init_writepagecache();
1569 if (err)
1570 goto out1;
1571
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 err = nfs_init_directcache();
1573 if (err)
1574 goto out0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575
1576#ifdef CONFIG_PROC_FS
1577 rpc_proc_register(&nfs_rpcstat);
1578#endif
David Howellsf7b422b2006-06-09 09:34:33 -04001579 if ((err = register_nfs_fs()) != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 goto out;
1581 return 0;
1582out:
1583#ifdef CONFIG_PROC_FS
1584 rpc_proc_unregister("nfs");
1585#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 nfs_destroy_directcache();
Chuck Lever6b59a752005-11-30 18:08:19 -05001587out0:
Chuck Lever6b59a752005-11-30 18:08:19 -05001588 nfs_destroy_writepagecache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589out1:
1590 nfs_destroy_readpagecache();
1591out2:
1592 nfs_destroy_inodecache();
1593out3:
1594 nfs_destroy_nfspagecache();
1595out4:
David Howells6aaca562006-08-22 20:06:13 -04001596 nfs_fs_proc_exit();
1597out5:
Trond Myklebust57460062008-02-19 20:04:22 -05001598 nfsiod_stop();
1599out6:
David Howells8ec442a2009-04-03 16:42:42 +01001600 nfs_fscache_unregister();
1601out7:
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001602 nfs_dns_resolver_destroy();
1603out8:
Bryan Schumaker955a8572010-09-29 15:41:49 -04001604 nfs_idmap_quit();
1605out9:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001606 return err;
1607}
1608
1609static void __exit exit_nfs_fs(void)
1610{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 nfs_destroy_directcache();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 nfs_destroy_writepagecache();
1613 nfs_destroy_readpagecache();
1614 nfs_destroy_inodecache();
1615 nfs_destroy_nfspagecache();
David Howells8ec442a2009-04-03 16:42:42 +01001616 nfs_fscache_unregister();
Trond Myklebuste571cbf2009-08-19 18:12:27 -04001617 nfs_dns_resolver_destroy();
Bryan Schumaker955a8572010-09-29 15:41:49 -04001618 nfs_idmap_quit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619#ifdef CONFIG_PROC_FS
1620 rpc_proc_unregister("nfs");
1621#endif
Andy Adamsonf4eecd52011-01-06 02:04:30 +00001622 nfs_cleanup_cb_ident_idr();
David Howellsf7b422b2006-06-09 09:34:33 -04001623 unregister_nfs_fs();
David Howells6aaca562006-08-22 20:06:13 -04001624 nfs_fs_proc_exit();
Trond Myklebust57460062008-02-19 20:04:22 -05001625 nfsiod_stop();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001626}
1627
1628/* Not quite true; I just maintain it */
1629MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1630MODULE_LICENSE("GPL");
Trond Myklebustf43bf0b2007-10-09 12:01:04 -04001631module_param(enable_ino64, bool, 0644);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632
1633module_init(init_nfs_fs)
1634module_exit(exit_nfs_fs)