blob: 062911e7ceb57b55ccf3cb7cd1141b82b825b10d [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 *
8 * Modularised by Alan Cox <Alan.Cox@linux.org>, while hacking some
9 * 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
16#include <linux/config.h>
17#include <linux/module.h>
18#include <linux/init.h>
19
20#include <linux/time.h>
21#include <linux/kernel.h>
22#include <linux/mm.h>
23#include <linux/string.h>
24#include <linux/stat.h>
25#include <linux/errno.h>
26#include <linux/unistd.h>
27#include <linux/sunrpc/clnt.h>
28#include <linux/sunrpc/stats.h>
29#include <linux/nfs_fs.h>
30#include <linux/nfs_mount.h>
31#include <linux/nfs4_mount.h>
32#include <linux/lockd/bind.h>
33#include <linux/smp_lock.h>
34#include <linux/seq_file.h>
35#include <linux/mount.h>
36#include <linux/nfs_idmap.h>
37#include <linux/vfs.h>
38
39#include <asm/system.h>
40#include <asm/uaccess.h>
41
Trond Myklebust4ce79712005-06-22 17:16:21 +000042#include "nfs4_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include "delegation.h"
44
45#define NFSDBG_FACILITY NFSDBG_VFS
46#define NFS_PARANOIA 1
47
48/* Maximum number of readahead requests
49 * FIXME: this should really be a sysctl so that users may tune it to suit
50 * their needs. People that do NFS over a slow network, might for
51 * instance want to reduce it to something closer to 1 for improved
52 * interactive response.
53 */
54#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
55
56static void nfs_invalidate_inode(struct inode *);
57static int nfs_update_inode(struct inode *, struct nfs_fattr *, unsigned long);
58
59static struct inode *nfs_alloc_inode(struct super_block *sb);
60static void nfs_destroy_inode(struct inode *);
61static int nfs_write_inode(struct inode *,int);
62static void nfs_delete_inode(struct inode *);
63static void nfs_clear_inode(struct inode *);
64static void nfs_umount_begin(struct super_block *);
65static int nfs_statfs(struct super_block *, struct kstatfs *);
66static int nfs_show_options(struct seq_file *, struct vfsmount *);
Trond Myklebustada70d92005-06-22 17:16:22 +000067static void nfs_zap_acl_cache(struct inode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69static struct rpc_program nfs_program;
70
71static struct super_operations nfs_sops = {
72 .alloc_inode = nfs_alloc_inode,
73 .destroy_inode = nfs_destroy_inode,
74 .write_inode = nfs_write_inode,
75 .delete_inode = nfs_delete_inode,
76 .statfs = nfs_statfs,
77 .clear_inode = nfs_clear_inode,
78 .umount_begin = nfs_umount_begin,
79 .show_options = nfs_show_options,
80};
81
82/*
83 * RPC cruft for NFS
84 */
85static struct rpc_stat nfs_rpcstat = {
86 .program = &nfs_program
87};
88static struct rpc_version * nfs_version[] = {
89 NULL,
90 NULL,
91 &nfs_version2,
92#if defined(CONFIG_NFS_V3)
93 &nfs_version3,
94#elif defined(CONFIG_NFS_V4)
95 NULL,
96#endif
97#if defined(CONFIG_NFS_V4)
98 &nfs_version4,
99#endif
100};
101
102static struct rpc_program nfs_program = {
103 .name = "nfs",
104 .number = NFS_PROGRAM,
105 .nrvers = sizeof(nfs_version) / sizeof(nfs_version[0]),
106 .version = nfs_version,
107 .stats = &nfs_rpcstat,
108 .pipe_dir_name = "/nfs",
109};
110
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000111#ifdef CONFIG_NFS_V3_ACL
112static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
113static struct rpc_version * nfsacl_version[] = {
114 [3] = &nfsacl_version3,
115};
116
117struct rpc_program nfsacl_program = {
118 .name = "nfsacl",
119 .number = NFS_ACL_PROGRAM,
120 .nrvers = sizeof(nfsacl_version) / sizeof(nfsacl_version[0]),
121 .version = nfsacl_version,
122 .stats = &nfsacl_rpcstat,
123};
124#endif /* CONFIG_NFS_V3_ACL */
125
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126static inline unsigned long
127nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
128{
129 return nfs_fileid_to_ino_t(fattr->fileid);
130}
131
132static int
133nfs_write_inode(struct inode *inode, int sync)
134{
135 int flags = sync ? FLUSH_WAIT : 0;
136 int ret;
137
Trond Myklebust3da28eb2005-06-22 17:16:31 +0000138 ret = nfs_commit_inode(inode, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 if (ret < 0)
140 return ret;
141 return 0;
142}
143
144static void
145nfs_delete_inode(struct inode * inode)
146{
147 dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino);
148
Mark Fashehfef26652005-09-09 13:01:31 -0700149 truncate_inode_pages(&inode->i_data, 0);
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 nfs_wb_all(inode);
152 /*
153 * The following should never happen...
154 */
155 if (nfs_have_writebacks(inode)) {
156 printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino);
157 }
158
159 clear_inode(inode);
160}
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static void
163nfs_clear_inode(struct inode *inode)
164{
165 struct nfs_inode *nfsi = NFS_I(inode);
166 struct rpc_cred *cred;
167
168 nfs_wb_all(inode);
169 BUG_ON (!list_empty(&nfsi->open_files));
Trond Myklebustada70d92005-06-22 17:16:22 +0000170 nfs_zap_acl_cache(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 cred = nfsi->cache_access.cred;
172 if (cred)
173 put_rpccred(cred);
174 BUG_ON(atomic_read(&nfsi->data_updates) != 0);
175}
176
177void
178nfs_umount_begin(struct super_block *sb)
179{
J. Bruce Fields6a192752005-06-22 17:16:23 +0000180 struct rpc_clnt *rpc = NFS_SB(sb)->client;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 /* -EIO all pending I/O */
J. Bruce Fields6a192752005-06-22 17:16:23 +0000183 if (!IS_ERR(rpc))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 rpc_killall_tasks(rpc);
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000185 rpc = NFS_SB(sb)->client_acl;
186 if (!IS_ERR(rpc))
187 rpc_killall_tasks(rpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188}
189
190
191static inline unsigned long
192nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
193{
194 /* make sure blocksize is a power of two */
195 if ((bsize & (bsize - 1)) || nrbitsp) {
196 unsigned char nrbits;
197
198 for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
199 ;
200 bsize = 1 << nrbits;
201 if (nrbitsp)
202 *nrbitsp = nrbits;
203 }
204
205 return bsize;
206}
207
208/*
209 * Calculate the number of 512byte blocks used.
210 */
211static inline unsigned long
212nfs_calc_block_size(u64 tsize)
213{
214 loff_t used = (tsize + 511) >> 9;
215 return (used > ULONG_MAX) ? ULONG_MAX : used;
216}
217
218/*
219 * Compute and set NFS server blocksize
220 */
221static inline unsigned long
222nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
223{
224 if (bsize < 1024)
225 bsize = NFS_DEF_FILE_IO_BUFFER_SIZE;
226 else if (bsize >= NFS_MAX_FILE_IO_BUFFER_SIZE)
227 bsize = NFS_MAX_FILE_IO_BUFFER_SIZE;
228
229 return nfs_block_bits(bsize, nrbitsp);
230}
231
232/*
233 * Obtain the root inode of the file system.
234 */
235static struct inode *
236nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo)
237{
238 struct nfs_server *server = NFS_SB(sb);
239 struct inode *rooti;
240 int error;
241
242 error = server->rpc_ops->getroot(server, rootfh, fsinfo);
243 if (error < 0) {
244 dprintk("nfs_get_root: getattr error = %d\n", -error);
245 return ERR_PTR(error);
246 }
247
248 rooti = nfs_fhget(sb, rootfh, fsinfo->fattr);
249 if (!rooti)
250 return ERR_PTR(-ENOMEM);
251 return rooti;
252}
253
254/*
255 * Do NFS version-independent mount processing, and sanity checking
256 */
257static int
258nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor)
259{
260 struct nfs_server *server;
261 struct inode *root_inode;
262 struct nfs_fattr fattr;
263 struct nfs_fsinfo fsinfo = {
264 .fattr = &fattr,
265 };
266 struct nfs_pathconf pathinfo = {
267 .fattr = &fattr,
268 };
269 int no_root_error = 0;
270 unsigned long max_rpc_payload;
271
272 /* We probably want something more informative here */
273 snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev));
274
275 server = NFS_SB(sb);
276
277 sb->s_magic = NFS_SUPER_MAGIC;
278
279 root_inode = nfs_get_root(sb, &server->fh, &fsinfo);
280 /* Did getting the root inode fail? */
281 if (IS_ERR(root_inode)) {
282 no_root_error = PTR_ERR(root_inode);
283 goto out_no_root;
284 }
285 sb->s_root = d_alloc_root(root_inode);
286 if (!sb->s_root) {
287 no_root_error = -ENOMEM;
288 goto out_no_root;
289 }
290 sb->s_root->d_op = server->rpc_ops->dentry_ops;
291
292 /* Get some general file system info */
293 if (server->namelen == 0 &&
294 server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0)
295 server->namelen = pathinfo.max_namelen;
296 /* Work out a lot of parameters */
297 if (server->rsize == 0)
298 server->rsize = nfs_block_size(fsinfo.rtpref, NULL);
299 if (server->wsize == 0)
300 server->wsize = nfs_block_size(fsinfo.wtpref, NULL);
301
302 if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax)
303 server->rsize = nfs_block_size(fsinfo.rtmax, NULL);
304 if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax)
305 server->wsize = nfs_block_size(fsinfo.wtmax, NULL);
306
307 max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL);
308 if (server->rsize > max_rpc_payload)
309 server->rsize = max_rpc_payload;
310 if (server->wsize > max_rpc_payload)
311 server->wsize = max_rpc_payload;
312
313 server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
314 if (server->rpages > NFS_READ_MAXIOV) {
315 server->rpages = NFS_READ_MAXIOV;
316 server->rsize = server->rpages << PAGE_CACHE_SHIFT;
317 }
318
319 server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
320 if (server->wpages > NFS_WRITE_MAXIOV) {
321 server->wpages = NFS_WRITE_MAXIOV;
322 server->wsize = server->wpages << PAGE_CACHE_SHIFT;
323 }
324
325 if (sb->s_blocksize == 0)
326 sb->s_blocksize = nfs_block_bits(server->wsize,
327 &sb->s_blocksize_bits);
328 server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL);
329
330 server->dtsize = nfs_block_size(fsinfo.dtpref, NULL);
331 if (server->dtsize > PAGE_CACHE_SIZE)
332 server->dtsize = PAGE_CACHE_SIZE;
333 if (server->dtsize > server->rsize)
334 server->dtsize = server->rsize;
335
336 if (server->flags & NFS_MOUNT_NOAC) {
337 server->acregmin = server->acregmax = 0;
338 server->acdirmin = server->acdirmax = 0;
339 sb->s_flags |= MS_SYNCHRONOUS;
340 }
341 server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD;
342
343 sb->s_maxbytes = fsinfo.maxfilesize;
344 if (sb->s_maxbytes > MAX_LFS_FILESIZE)
345 sb->s_maxbytes = MAX_LFS_FILESIZE;
346
347 server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0;
348 server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0;
349
350 /* We're airborne Set socket buffersize */
351 rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
352 return 0;
353 /* Yargs. It didn't work out. */
354out_no_root:
355 dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error);
356 if (!IS_ERR(root_inode))
357 iput(root_inode);
358 return no_root_error;
359}
360
Chuck Levereab5c082005-08-11 16:25:14 -0400361static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
362{
363 to->to_initval = timeo * HZ / 10;
364 to->to_retries = retrans;
365 if (!to->to_retries)
366 to->to_retries = 2;
367
368 switch (proto) {
369 case IPPROTO_TCP:
370 if (!to->to_initval)
371 to->to_initval = 60 * HZ;
Chuck Lever03bf4b72005-08-25 16:25:55 -0700372 if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
373 to->to_initval = NFS_MAX_TCP_TIMEOUT;
Chuck Levereab5c082005-08-11 16:25:14 -0400374 to->to_increment = to->to_initval;
375 to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
376 to->to_exponential = 0;
377 break;
378 case IPPROTO_UDP:
379 default:
380 if (!to->to_initval)
381 to->to_initval = 11 * HZ / 10;
Chuck Lever03bf4b72005-08-25 16:25:55 -0700382 if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
383 to->to_initval = NFS_MAX_UDP_TIMEOUT;
384 to->to_maxval = NFS_MAX_UDP_TIMEOUT;
Chuck Levereab5c082005-08-11 16:25:14 -0400385 to->to_exponential = 1;
386 break;
387 }
388}
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390/*
391 * Create an RPC client handle.
392 */
393static struct rpc_clnt *
394nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data)
395{
396 struct rpc_timeout timeparms;
397 struct rpc_xprt *xprt = NULL;
398 struct rpc_clnt *clnt = NULL;
Chuck Levereab5c082005-08-11 16:25:14 -0400399 int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Chuck Levereab5c082005-08-11 16:25:14 -0400401 nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403 /* create transport and client */
Chuck Levereab5c082005-08-11 16:25:14 -0400404 xprt = xprt_create_proto(proto, &server->addr, &timeparms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 if (IS_ERR(xprt)) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +0000406 dprintk("%s: cannot create RPC transport. Error = %ld\n",
407 __FUNCTION__, PTR_ERR(xprt));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 return (struct rpc_clnt *)xprt;
409 }
410 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
411 server->rpc_ops->version, data->pseudoflavor);
412 if (IS_ERR(clnt)) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +0000413 dprintk("%s: cannot create RPC client. Error = %ld\n",
414 __FUNCTION__, PTR_ERR(xprt));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 goto out_fail;
416 }
417
418 clnt->cl_intr = 1;
419 clnt->cl_softrtry = 1;
420 clnt->cl_chatty = 1;
421
422 return clnt;
423
424out_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return clnt;
426}
427
428/*
429 * The way this works is that the mount process passes a structure
430 * in the data argument which contains the server's IP address
431 * and the root file handle obtained from the server's mount
432 * daemon. We stash these away in the private superblock fields.
433 */
434static int
435nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent)
436{
437 struct nfs_server *server;
438 rpc_authflavor_t authflavor;
439
440 server = NFS_SB(sb);
441 sb->s_blocksize_bits = 0;
442 sb->s_blocksize = 0;
443 if (data->bsize)
444 sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits);
445 if (data->rsize)
446 server->rsize = nfs_block_size(data->rsize, NULL);
447 if (data->wsize)
448 server->wsize = nfs_block_size(data->wsize, NULL);
449 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
450
451 server->acregmin = data->acregmin*HZ;
452 server->acregmax = data->acregmax*HZ;
453 server->acdirmin = data->acdirmin*HZ;
454 server->acdirmax = data->acdirmax*HZ;
455
456 /* Start lockd here, before we might error out */
457 if (!(server->flags & NFS_MOUNT_NONLM))
458 lockd_up();
459
460 server->namelen = data->namlen;
461 server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL);
462 if (!server->hostname)
463 return -ENOMEM;
464 strcpy(server->hostname, data->hostname);
465
466 /* Check NFS protocol revision and initialize RPC op vector
467 * and file handle pool. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468#ifdef CONFIG_NFS_V3
Trond Myklebust9085bbc2005-06-22 17:16:20 +0000469 if (server->flags & NFS_MOUNT_VER3) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 server->rpc_ops = &nfs_v3_clientops;
471 server->caps |= NFS_CAP_READDIRPLUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 } else {
473 server->rpc_ops = &nfs_v2_clientops;
474 }
Trond Myklebust9085bbc2005-06-22 17:16:20 +0000475#else
476 server->rpc_ops = &nfs_v2_clientops;
477#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479 /* Fill in pseudoflavor for mount version < 5 */
480 if (!(data->flags & NFS_MOUNT_SECFLAVOUR))
481 data->pseudoflavor = RPC_AUTH_UNIX;
482 authflavor = data->pseudoflavor; /* save for sb_init() */
483 /* XXX maybe we want to add a server->pseudoflavor field */
484
485 /* Create RPC client handles */
486 server->client = nfs_create_client(server, data);
487 if (IS_ERR(server->client))
488 return PTR_ERR(server->client);
489 /* RFC 2623, sec 2.3.2 */
490 if (authflavor != RPC_AUTH_UNIX) {
J. Bruce Fields6a192752005-06-22 17:16:23 +0000491 struct rpc_auth *auth;
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 server->client_sys = rpc_clone_client(server->client);
494 if (IS_ERR(server->client_sys))
495 return PTR_ERR(server->client_sys);
J. Bruce Fields6a192752005-06-22 17:16:23 +0000496 auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys);
497 if (IS_ERR(auth))
498 return PTR_ERR(auth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 } else {
500 atomic_inc(&server->client->cl_count);
501 server->client_sys = server->client;
502 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 if (server->flags & NFS_MOUNT_VER3) {
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000504#ifdef CONFIG_NFS_V3_ACL
505 if (!(server->flags & NFS_MOUNT_NOACL)) {
506 server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
507 /* No errors! Assume that Sun nfsacls are supported */
508 if (!IS_ERR(server->client_acl))
509 server->caps |= NFS_CAP_ACLS;
510 }
511#else
512 server->flags &= ~NFS_MOUNT_NOACL;
513#endif /* CONFIG_NFS_V3_ACL */
Andreas Gruenbacher055ffbe2005-06-22 17:16:27 +0000514 /*
515 * The VFS shouldn't apply the umask to mode bits. We will
516 * do so ourselves when necessary.
517 */
518 sb->s_flags |= MS_POSIXACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
520 server->namelen = NFS3_MAXNAMLEN;
521 sb->s_time_gran = 1;
522 } else {
523 if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
524 server->namelen = NFS2_MAXNAMLEN;
525 }
526
527 sb->s_op = &nfs_sops;
528 return nfs_sb_init(sb, authflavor);
529}
530
531static int
532nfs_statfs(struct super_block *sb, struct kstatfs *buf)
533{
534 struct nfs_server *server = NFS_SB(sb);
535 unsigned char blockbits;
536 unsigned long blockres;
537 struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode);
538 struct nfs_fattr fattr;
539 struct nfs_fsstat res = {
540 .fattr = &fattr,
541 };
542 int error;
543
544 lock_kernel();
545
546 error = server->rpc_ops->statfs(server, rootfh, &res);
547 buf->f_type = NFS_SUPER_MAGIC;
548 if (error < 0)
549 goto out_err;
550
551 /*
552 * Current versions of glibc do not correctly handle the
553 * case where f_frsize != f_bsize. Eventually we want to
554 * report the value of wtmult in this field.
555 */
556 buf->f_frsize = sb->s_blocksize;
557
558 /*
559 * On most *nix systems, f_blocks, f_bfree, and f_bavail
560 * are reported in units of f_frsize. Linux hasn't had
561 * an f_frsize field in its statfs struct until recently,
562 * thus historically Linux's sys_statfs reports these
563 * fields in units of f_bsize.
564 */
565 buf->f_bsize = sb->s_blocksize;
566 blockbits = sb->s_blocksize_bits;
567 blockres = (1 << blockbits) - 1;
568 buf->f_blocks = (res.tbytes + blockres) >> blockbits;
569 buf->f_bfree = (res.fbytes + blockres) >> blockbits;
570 buf->f_bavail = (res.abytes + blockres) >> blockbits;
571
572 buf->f_files = res.tfiles;
573 buf->f_ffree = res.afiles;
574
575 buf->f_namelen = server->namelen;
576 out:
577 unlock_kernel();
578
579 return 0;
580
581 out_err:
582 printk(KERN_WARNING "nfs_statfs: statfs error = %d\n", -error);
583 buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1;
584 goto out;
585
586}
587
588static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt)
589{
590 static struct proc_nfs_info {
591 int flag;
592 char *str;
593 char *nostr;
594 } nfs_info[] = {
595 { NFS_MOUNT_SOFT, ",soft", ",hard" },
596 { NFS_MOUNT_INTR, ",intr", "" },
597 { NFS_MOUNT_POSIX, ",posix", "" },
598 { NFS_MOUNT_TCP, ",tcp", ",udp" },
599 { NFS_MOUNT_NOCTO, ",nocto", "" },
600 { NFS_MOUNT_NOAC, ",noac", "" },
601 { NFS_MOUNT_NONLM, ",nolock", ",lock" },
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +0000602 { NFS_MOUNT_NOACL, ",noacl", "" },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 { 0, NULL, NULL }
604 };
605 struct proc_nfs_info *nfs_infop;
606 struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
607
608 seq_printf(m, ",v%d", nfss->rpc_ops->version);
609 seq_printf(m, ",rsize=%d", nfss->rsize);
610 seq_printf(m, ",wsize=%d", nfss->wsize);
611 if (nfss->acregmin != 3*HZ)
612 seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ);
613 if (nfss->acregmax != 60*HZ)
614 seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ);
615 if (nfss->acdirmin != 30*HZ)
616 seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ);
617 if (nfss->acdirmax != 60*HZ)
618 seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ);
619 for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
620 if (nfss->flags & nfs_infop->flag)
621 seq_puts(m, nfs_infop->str);
622 else
623 seq_puts(m, nfs_infop->nostr);
624 }
625 seq_puts(m, ",addr=");
626 seq_escape(m, nfss->hostname, " \t\n\\");
627 return 0;
628}
629
630/*
631 * Invalidate the local caches
632 */
633void
634nfs_zap_caches(struct inode *inode)
635{
636 struct nfs_inode *nfsi = NFS_I(inode);
637 int mode = inode->i_mode;
638
Chuck Leverdc592502005-08-18 11:24:12 -0700639 spin_lock(&inode->i_lock);
640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode);
642 NFS_ATTRTIMEO_UPDATE(inode) = jiffies;
643
644 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
645 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
Chuck Lever55296802005-08-18 11:24:09 -0700646 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 -0700647 else
Chuck Lever55296802005-08-18 11:24:09 -0700648 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
Chuck Leverdc592502005-08-18 11:24:12 -0700649
650 spin_unlock(&inode->i_lock);
Trond Myklebustada70d92005-06-22 17:16:22 +0000651}
652
653static void nfs_zap_acl_cache(struct inode *inode)
654{
655 void (*clear_acl_cache)(struct inode *);
656
657 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
658 if (clear_acl_cache != NULL)
659 clear_acl_cache(inode);
Chuck Leverdc592502005-08-18 11:24:12 -0700660 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700661 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700662 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
665/*
666 * Invalidate, but do not unhash, the inode
667 */
668static void
669nfs_invalidate_inode(struct inode *inode)
670{
671 umode_t save_mode = inode->i_mode;
672
673 make_bad_inode(inode);
674 inode->i_mode = save_mode;
675 nfs_zap_caches(inode);
676}
677
678struct nfs_find_desc {
679 struct nfs_fh *fh;
680 struct nfs_fattr *fattr;
681};
682
683/*
684 * In NFSv3 we can have 64bit inode numbers. In order to support
685 * this, and re-exported directories (also seen in NFSv2)
686 * we are forced to allow 2 different inodes to have the same
687 * i_ino.
688 */
689static int
690nfs_find_actor(struct inode *inode, void *opaque)
691{
692 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
693 struct nfs_fh *fh = desc->fh;
694 struct nfs_fattr *fattr = desc->fattr;
695
696 if (NFS_FILEID(inode) != fattr->fileid)
697 return 0;
698 if (nfs_compare_fh(NFS_FH(inode), fh))
699 return 0;
700 if (is_bad_inode(inode) || NFS_STALE(inode))
701 return 0;
702 return 1;
703}
704
705static int
706nfs_init_locked(struct inode *inode, void *opaque)
707{
708 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
709 struct nfs_fattr *fattr = desc->fattr;
710
711 NFS_FILEID(inode) = fattr->fileid;
712 nfs_copy_fh(NFS_FH(inode), desc->fh);
713 return 0;
714}
715
716/* Don't use READDIRPLUS on directories that we believe are too large */
717#define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
718
719/*
720 * This is our front-end to iget that looks up inodes by file handle
721 * instead of inode number.
722 */
723struct inode *
724nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
725{
726 struct nfs_find_desc desc = {
727 .fh = fh,
728 .fattr = fattr
729 };
730 struct inode *inode = NULL;
731 unsigned long hash;
732
733 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
734 goto out_no_inode;
735
736 if (!fattr->nlink) {
737 printk("NFS: Buggy server - nlink == 0!\n");
738 goto out_no_inode;
739 }
740
741 hash = nfs_fattr_to_ino_t(fattr);
742
743 if (!(inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc)))
744 goto out_no_inode;
745
746 if (inode->i_state & I_NEW) {
747 struct nfs_inode *nfsi = NFS_I(inode);
748
749 /* We set i_ino for the few things that still rely on it,
750 * such as stat(2) */
751 inode->i_ino = hash;
752
753 /* We can't support update_atime(), since the server will reset it */
754 inode->i_flags |= S_NOATIME|S_NOCMTIME;
755 inode->i_mode = fattr->mode;
756 /* Why so? Because we want revalidate for devices/FIFOs, and
757 * that's precisely what we have in nfs_file_inode_operations.
758 */
J. Bruce Fields92cfc622005-06-22 17:16:22 +0000759 inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 if (S_ISREG(inode->i_mode)) {
761 inode->i_fop = &nfs_file_operations;
762 inode->i_data.a_ops = &nfs_file_aops;
763 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
764 } else if (S_ISDIR(inode->i_mode)) {
765 inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops;
766 inode->i_fop = &nfs_dir_operations;
767 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
768 && fattr->size <= NFS_LIMIT_READDIRPLUS)
Chuck Lever412d5822005-08-18 11:24:11 -0700769 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 } else if (S_ISLNK(inode->i_mode))
771 inode->i_op = &nfs_symlink_inode_operations;
772 else
773 init_special_inode(inode, inode->i_mode, fattr->rdev);
774
775 nfsi->read_cache_jiffies = fattr->timestamp;
776 inode->i_atime = fattr->atime;
777 inode->i_mtime = fattr->mtime;
778 inode->i_ctime = fattr->ctime;
779 if (fattr->valid & NFS_ATTR_FATTR_V4)
780 nfsi->change_attr = fattr->change_attr;
781 inode->i_size = nfs_size_to_loff_t(fattr->size);
782 inode->i_nlink = fattr->nlink;
783 inode->i_uid = fattr->uid;
784 inode->i_gid = fattr->gid;
785 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
786 /*
787 * report the blocks in 512byte units
788 */
789 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
790 inode->i_blksize = inode->i_sb->s_blocksize;
791 } else {
792 inode->i_blocks = fattr->du.nfs2.blocks;
793 inode->i_blksize = fattr->du.nfs2.blocksize;
794 }
795 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
796 nfsi->attrtimeo_timestamp = jiffies;
797 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
798 nfsi->cache_access.cred = NULL;
799
800 unlock_new_inode(inode);
801 } else
802 nfs_refresh_inode(inode, fattr);
803 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
804 inode->i_sb->s_id,
805 (long long)NFS_FILEID(inode),
806 atomic_read(&inode->i_count));
807
808out:
809 return inode;
810
811out_no_inode:
812 printk("nfs_fhget: iget failed\n");
813 goto out;
814}
815
816#define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET)
817
818int
819nfs_setattr(struct dentry *dentry, struct iattr *attr)
820{
821 struct inode *inode = dentry->d_inode;
822 struct nfs_fattr fattr;
823 int error;
824
825 if (attr->ia_valid & ATTR_SIZE) {
826 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
827 attr->ia_valid &= ~ATTR_SIZE;
828 }
829
830 /* Optimization: if the end result is no change, don't RPC */
831 attr->ia_valid &= NFS_VALID_ATTRS;
832 if (attr->ia_valid == 0)
833 return 0;
834
835 lock_kernel();
836 nfs_begin_data_update(inode);
837 /* Write all dirty data if we're changing file permissions or size */
838 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) {
839 if (filemap_fdatawrite(inode->i_mapping) == 0)
840 filemap_fdatawait(inode->i_mapping);
841 nfs_wb_all(inode);
842 }
843 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400844 if (error == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 nfs_refresh_inode(inode, &fattr);
Trond Myklebust65e43082005-08-16 11:49:44 -0400846 nfs_end_data_update(inode);
847 unlock_kernel();
848 return error;
849}
850
851/**
852 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
853 * @inode: pointer to struct inode
854 * @attr: pointer to struct iattr
855 *
856 * Note: we do this in the *proc.c in order to ensure that
857 * it works for things like exclusive creates too.
858 */
859void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
860{
861 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 if ((attr->ia_valid & ATTR_MODE) != 0) {
Trond Myklebust65e43082005-08-16 11:49:44 -0400863 int mode = attr->ia_mode & S_IALLUGO;
864 mode |= inode->i_mode & ~S_IALLUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 inode->i_mode = mode;
866 }
867 if ((attr->ia_valid & ATTR_UID) != 0)
868 inode->i_uid = attr->ia_uid;
869 if ((attr->ia_valid & ATTR_GID) != 0)
870 inode->i_gid = attr->ia_gid;
Chuck Leverdc592502005-08-18 11:24:12 -0700871 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -0700872 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Chuck Leverdc592502005-08-18 11:24:12 -0700873 spin_unlock(&inode->i_lock);
Trond Myklebust65e43082005-08-16 11:49:44 -0400874 }
875 if ((attr->ia_valid & ATTR_SIZE) != 0) {
876 inode->i_size = attr->ia_size;
877 vmtruncate(inode, attr->ia_size);
878 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
880
Chuck Lever412d5822005-08-18 11:24:11 -0700881static int nfs_wait_schedule(void *word)
882{
883 if (signal_pending(current))
884 return -ERESTARTSYS;
885 schedule();
886 return 0;
887}
888
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889/*
890 * Wait for the inode to get unlocked.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 */
Chuck Lever412d5822005-08-18 11:24:11 -0700892static int nfs_wait_on_inode(struct inode *inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893{
894 struct rpc_clnt *clnt = NFS_CLIENT(inode);
895 struct nfs_inode *nfsi = NFS_I(inode);
Chuck Lever412d5822005-08-18 11:24:11 -0700896 sigset_t oldmask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 int error;
Chuck Lever412d5822005-08-18 11:24:11 -0700898
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 atomic_inc(&inode->i_count);
Chuck Lever412d5822005-08-18 11:24:11 -0700900 rpc_clnt_sigmask(clnt, &oldmask);
901 error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING,
902 nfs_wait_schedule, TASK_INTERRUPTIBLE);
903 rpc_clnt_sigunmask(clnt, &oldmask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904 iput(inode);
Chuck Lever412d5822005-08-18 11:24:11 -0700905
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 return error;
907}
908
Chuck Lever412d5822005-08-18 11:24:11 -0700909static void nfs_wake_up_inode(struct inode *inode)
910{
911 struct nfs_inode *nfsi = NFS_I(inode);
912
913 clear_bit(NFS_INO_REVALIDATING, &nfsi->flags);
914 smp_mb__after_clear_bit();
915 wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING);
916}
917
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
919{
920 struct inode *inode = dentry->d_inode;
Chuck Lever55296802005-08-18 11:24:09 -0700921 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 int err;
923
924 if (__IS_FLG(inode, MS_NOATIME))
925 need_atime = 0;
926 else if (__IS_FLG(inode, MS_NODIRATIME) && S_ISDIR(inode->i_mode))
927 need_atime = 0;
928 /* We may force a getattr if the user cares about atime */
929 if (need_atime)
930 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
931 else
932 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
933 if (!err)
934 generic_fillattr(inode, stat);
935 return err;
936}
937
938struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred)
939{
940 struct nfs_open_context *ctx;
941
942 ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL);
943 if (ctx != NULL) {
944 atomic_set(&ctx->count, 1);
945 ctx->dentry = dget(dentry);
946 ctx->cred = get_rpccred(cred);
947 ctx->state = NULL;
948 ctx->lockowner = current->files;
949 ctx->error = 0;
Olivier Galibert00a92642005-06-22 17:16:29 +0000950 ctx->dir_cookie = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 }
952 return ctx;
953}
954
955struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
956{
957 if (ctx != NULL)
958 atomic_inc(&ctx->count);
959 return ctx;
960}
961
962void put_nfs_open_context(struct nfs_open_context *ctx)
963{
964 if (atomic_dec_and_test(&ctx->count)) {
965 if (!list_empty(&ctx->list)) {
966 struct inode *inode = ctx->dentry->d_inode;
967 spin_lock(&inode->i_lock);
968 list_del(&ctx->list);
969 spin_unlock(&inode->i_lock);
970 }
971 if (ctx->state != NULL)
972 nfs4_close_state(ctx->state, ctx->mode);
973 if (ctx->cred != NULL)
974 put_rpccred(ctx->cred);
975 dput(ctx->dentry);
976 kfree(ctx);
977 }
978}
979
980/*
981 * Ensure that mmap has a recent RPC credential for use when writing out
982 * shared pages
983 */
984void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
985{
986 struct inode *inode = filp->f_dentry->d_inode;
987 struct nfs_inode *nfsi = NFS_I(inode);
988
989 filp->private_data = get_nfs_open_context(ctx);
990 spin_lock(&inode->i_lock);
991 list_add(&ctx->list, &nfsi->open_files);
992 spin_unlock(&inode->i_lock);
993}
994
995struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode)
996{
997 struct nfs_inode *nfsi = NFS_I(inode);
998 struct nfs_open_context *pos, *ctx = NULL;
999
1000 spin_lock(&inode->i_lock);
1001 list_for_each_entry(pos, &nfsi->open_files, list) {
1002 if ((pos->mode & mode) == mode) {
1003 ctx = get_nfs_open_context(pos);
1004 break;
1005 }
1006 }
1007 spin_unlock(&inode->i_lock);
1008 return ctx;
1009}
1010
1011void nfs_file_clear_open_context(struct file *filp)
1012{
1013 struct inode *inode = filp->f_dentry->d_inode;
1014 struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data;
1015
1016 if (ctx) {
1017 filp->private_data = NULL;
1018 spin_lock(&inode->i_lock);
1019 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
1020 spin_unlock(&inode->i_lock);
1021 put_nfs_open_context(ctx);
1022 }
1023}
1024
1025/*
1026 * These allocate and release file read/write context information.
1027 */
1028int nfs_open(struct inode *inode, struct file *filp)
1029{
1030 struct nfs_open_context *ctx;
1031 struct rpc_cred *cred;
1032
1033 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1034 if (IS_ERR(cred))
1035 return PTR_ERR(cred);
1036 ctx = alloc_nfs_open_context(filp->f_dentry, cred);
1037 put_rpccred(cred);
1038 if (ctx == NULL)
1039 return -ENOMEM;
1040 ctx->mode = filp->f_mode;
1041 nfs_file_set_open_context(filp, ctx);
1042 put_nfs_open_context(ctx);
1043 if ((filp->f_mode & FMODE_WRITE) != 0)
1044 nfs_begin_data_update(inode);
1045 return 0;
1046}
1047
1048int nfs_release(struct inode *inode, struct file *filp)
1049{
1050 if ((filp->f_mode & FMODE_WRITE) != 0)
1051 nfs_end_data_update(inode);
1052 nfs_file_clear_open_context(filp);
1053 return 0;
1054}
1055
1056/*
1057 * This function is called whenever some part of NFS notices that
1058 * the cached attributes have to be refreshed.
1059 */
1060int
1061__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1062{
1063 int status = -ESTALE;
1064 struct nfs_fattr fattr;
1065 struct nfs_inode *nfsi = NFS_I(inode);
1066 unsigned long verifier;
Chuck Lever55296802005-08-18 11:24:09 -07001067 unsigned long cache_validity;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068
1069 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
1070 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
1071
1072 lock_kernel();
1073 if (!inode || is_bad_inode(inode))
1074 goto out_nowait;
1075 if (NFS_STALE(inode))
1076 goto out_nowait;
1077
Chuck Lever412d5822005-08-18 11:24:11 -07001078 status = nfs_wait_on_inode(inode);
1079 if (status < 0)
1080 goto out;
1081 if (NFS_STALE(inode)) {
1082 status = -ESTALE;
1083 /* Do we trust the cached ESTALE? */
1084 if (NFS_ATTRTIMEO(inode) != 0) {
1085 if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) {
1086 /* no */
1087 } else
1088 goto out;
1089 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 /* Protect against RPC races by saving the change attribute */
1093 verifier = nfs_save_change_attribute(inode);
1094 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
1095 if (status != 0) {
1096 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
1097 inode->i_sb->s_id,
1098 (long long)NFS_FILEID(inode), status);
1099 if (status == -ESTALE) {
1100 nfs_zap_caches(inode);
1101 if (!S_ISDIR(inode->i_mode))
Chuck Lever412d5822005-08-18 11:24:11 -07001102 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 }
1104 goto out;
1105 }
1106
1107 status = nfs_update_inode(inode, &fattr, verifier);
1108 if (status) {
1109 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
1110 inode->i_sb->s_id,
1111 (long long)NFS_FILEID(inode), status);
1112 goto out;
1113 }
Chuck Leverdc592502005-08-18 11:24:12 -07001114 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -07001115 cache_validity = nfsi->cache_validity;
1116 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1117
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 /*
1119 * We may need to keep the attributes marked as invalid if
1120 * we raced with nfs_end_attr_update().
1121 */
1122 if (verifier == nfsi->cache_change_attribute)
Chuck Lever55296802005-08-18 11:24:09 -07001123 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
Chuck Leverdc592502005-08-18 11:24:12 -07001124 spin_unlock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -07001125
Trond Myklebust7d52e862005-06-22 17:16:30 +00001126 nfs_revalidate_mapping(inode, inode->i_mapping);
Chuck Lever55296802005-08-18 11:24:09 -07001127
1128 if (cache_validity & NFS_INO_INVALID_ACL)
Trond Myklebustada70d92005-06-22 17:16:22 +00001129 nfs_zap_acl_cache(inode);
Chuck Lever55296802005-08-18 11:24:09 -07001130
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
1132 inode->i_sb->s_id,
1133 (long long)NFS_FILEID(inode));
1134
Chuck Lever412d5822005-08-18 11:24:11 -07001135 out:
1136 nfs_wake_up_inode(inode);
1137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 out_nowait:
1139 unlock_kernel();
1140 return status;
1141}
1142
1143int nfs_attribute_timeout(struct inode *inode)
1144{
1145 struct nfs_inode *nfsi = NFS_I(inode);
1146
1147 if (nfs_have_delegation(inode, FMODE_READ))
1148 return 0;
1149 return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo);
1150}
1151
1152/**
1153 * nfs_revalidate_inode - Revalidate the inode attributes
1154 * @server - pointer to nfs_server struct
1155 * @inode - pointer to inode struct
1156 *
1157 * Updates inode attribute information by retrieving the data from the server.
1158 */
1159int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1160{
Chuck Lever55296802005-08-18 11:24:09 -07001161 if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001162 && !nfs_attribute_timeout(inode))
1163 return NFS_STALE(inode) ? -ESTALE : 0;
1164 return __nfs_revalidate_inode(server, inode);
1165}
1166
1167/**
Trond Myklebust7d52e862005-06-22 17:16:30 +00001168 * nfs_revalidate_mapping - Revalidate the pagecache
1169 * @inode - pointer to host inode
1170 * @mapping - pointer to mapping
1171 */
1172void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1173{
1174 struct nfs_inode *nfsi = NFS_I(inode);
1175
Chuck Lever55296802005-08-18 11:24:09 -07001176 if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
Trond Myklebust7d52e862005-06-22 17:16:30 +00001177 if (S_ISREG(inode->i_mode)) {
1178 if (filemap_fdatawrite(mapping) == 0)
1179 filemap_fdatawait(mapping);
1180 nfs_wb_all(inode);
1181 }
1182 invalidate_inode_pages2(mapping);
Chuck Leverdc592502005-08-18 11:24:12 -07001183
1184 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -07001185 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
Trond Myklebust7d52e862005-06-22 17:16:30 +00001186 if (S_ISDIR(inode->i_mode)) {
1187 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1188 /* This ensures we revalidate child dentries */
1189 nfsi->cache_change_attribute++;
1190 }
Chuck Leverdc592502005-08-18 11:24:12 -07001191 spin_unlock(&inode->i_lock);
1192
Trond Myklebust7d52e862005-06-22 17:16:30 +00001193 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
1194 inode->i_sb->s_id,
1195 (long long)NFS_FILEID(inode));
1196 }
1197}
1198
1199/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 * nfs_begin_data_update
1201 * @inode - pointer to inode
1202 * Declare that a set of operations will update file data on the server
1203 */
1204void nfs_begin_data_update(struct inode *inode)
1205{
1206 atomic_inc(&NFS_I(inode)->data_updates);
1207}
1208
1209/**
1210 * nfs_end_data_update
1211 * @inode - pointer to inode
1212 * Declare end of the operations that will update file data
1213 * This will mark the inode as immediately needing revalidation
1214 * of its attribute cache.
1215 */
1216void nfs_end_data_update(struct inode *inode)
1217{
1218 struct nfs_inode *nfsi = NFS_I(inode);
1219
1220 if (!nfs_have_delegation(inode, FMODE_READ)) {
1221 /* Mark the attribute cache for revalidation */
Chuck Leverdc592502005-08-18 11:24:12 -07001222 spin_lock(&inode->i_lock);
Chuck Lever55296802005-08-18 11:24:09 -07001223 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 /* Directories and symlinks: invalidate page cache too */
1225 if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
Chuck Lever55296802005-08-18 11:24:09 -07001226 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
Chuck Leverdc592502005-08-18 11:24:12 -07001227 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 }
1229 nfsi->cache_change_attribute ++;
1230 atomic_dec(&nfsi->data_updates);
1231}
1232
1233/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 * nfs_refresh_inode - verify consistency of the inode attribute cache
1235 * @inode - pointer to inode
1236 * @fattr - updated attributes
1237 *
1238 * Verifies the attribute cache. If we have just changed the attributes,
1239 * so that fattr carries weak cache consistency data, then it may
1240 * also update the ctime/mtime/change_attribute.
1241 */
1242int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1243{
1244 struct nfs_inode *nfsi = NFS_I(inode);
1245 loff_t cur_size, new_isize;
1246 int data_unstable;
1247
1248 /* Do we hold a delegation? */
1249 if (nfs_have_delegation(inode, FMODE_READ))
1250 return 0;
1251
Chuck Leverdc592502005-08-18 11:24:12 -07001252 spin_lock(&inode->i_lock);
1253
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 /* Are we in the process of updating data on the server? */
1255 data_unstable = nfs_caches_unstable(inode);
1256
1257 if (fattr->valid & NFS_ATTR_FATTR_V4) {
1258 if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0
1259 && nfsi->change_attr == fattr->pre_change_attr)
1260 nfsi->change_attr = fattr->change_attr;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001261 if (nfsi->change_attr != fattr->change_attr) {
Chuck Lever55296802005-08-18 11:24:09 -07001262 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001263 if (!data_unstable)
Chuck Lever55296802005-08-18 11:24:09 -07001264 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001265 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 }
1267
Chuck Leverdc592502005-08-18 11:24:12 -07001268 if ((fattr->valid & NFS_ATTR_FATTR) == 0) {
1269 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 return 0;
Chuck Leverdc592502005-08-18 11:24:12 -07001271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272
1273 /* Has the inode gone and changed behind our back? */
1274 if (nfsi->fileid != fattr->fileid
Chuck Leverdc592502005-08-18 11:24:12 -07001275 || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1276 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 return -EIO;
Chuck Leverdc592502005-08-18 11:24:12 -07001278 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279
1280 cur_size = i_size_read(inode);
1281 new_isize = nfs_size_to_loff_t(fattr->size);
1282
1283 /* If we have atomic WCC data, we may update some attributes */
1284 if ((fattr->valid & NFS_ATTR_WCC) != 0) {
1285 if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
1286 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1287 if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime))
1288 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1289 }
1290
1291 /* Verify a few of the more important attributes */
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001292 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
Chuck Lever55296802005-08-18 11:24:09 -07001293 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001294 if (!data_unstable)
Chuck Lever55296802005-08-18 11:24:09 -07001295 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001296 }
1297 if (cur_size != new_isize) {
Chuck Lever55296802005-08-18 11:24:09 -07001298 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001299 if (nfsi->npages == 0)
Chuck Lever55296802005-08-18 11:24:09 -07001300 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
Trond Myklebustfe51beec2005-06-22 17:16:30 +00001301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
1303 /* Have any file permissions changed? */
1304 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)
1305 || inode->i_uid != fattr->uid
1306 || inode->i_gid != fattr->gid)
Chuck Lever55296802005-08-18 11:24:09 -07001307 nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308
1309 /* Has the link count changed? */
1310 if (inode->i_nlink != fattr->nlink)
Chuck Lever55296802005-08-18 11:24:09 -07001311 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312
1313 if (!timespec_equal(&inode->i_atime, &fattr->atime))
Chuck Lever55296802005-08-18 11:24:09 -07001314 nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315
1316 nfsi->read_cache_jiffies = fattr->timestamp;
Chuck Leverdc592502005-08-18 11:24:12 -07001317 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 return 0;
1319}
1320
1321/*
1322 * Many nfs protocol calls return the new file attributes after
1323 * an operation. Here we update the inode to reflect the state
1324 * of the server's inode.
1325 *
1326 * This is a bit tricky because we have to make sure all dirty pages
1327 * have been sent off to the server before calling invalidate_inode_pages.
1328 * To make sure no other process adds more write requests while we try
1329 * our best to flush them, we make them sleep during the attribute refresh.
1330 *
1331 * A very similar scenario holds for the dir cache.
1332 */
1333static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr, unsigned long verifier)
1334{
1335 struct nfs_inode *nfsi = NFS_I(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001336 loff_t cur_isize, new_isize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 unsigned int invalid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 int data_unstable;
1339
1340 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1341 __FUNCTION__, inode->i_sb->s_id, inode->i_ino,
1342 atomic_read(&inode->i_count), fattr->valid);
1343
1344 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1345 return 0;
1346
1347 if (nfsi->fileid != fattr->fileid) {
1348 printk(KERN_ERR "%s: inode number mismatch\n"
1349 "expected (%s/0x%Lx), got (%s/0x%Lx)\n",
1350 __FUNCTION__,
1351 inode->i_sb->s_id, (long long)nfsi->fileid,
1352 inode->i_sb->s_id, (long long)fattr->fileid);
1353 goto out_err;
1354 }
1355
Chuck Leverdc592502005-08-18 11:24:12 -07001356 spin_lock(&inode->i_lock);
1357
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 /*
1359 * Make sure the inode's type hasn't changed.
1360 */
Chuck Leverdc592502005-08-18 11:24:12 -07001361 if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1362 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 goto out_changed;
Chuck Leverdc592502005-08-18 11:24:12 -07001364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
1366 /*
1367 * Update the read time so we don't revalidate too often.
1368 */
1369 nfsi->read_cache_jiffies = fattr->timestamp;
1370
1371 /* Are we racing with known updates of the metadata on the server? */
1372 data_unstable = ! nfs_verify_change_attribute(inode, verifier);
1373
Trond Myklebust951a1432005-06-22 17:16:30 +00001374 /* Check if our cached file size is stale */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 new_isize = nfs_size_to_loff_t(fattr->size);
1376 cur_isize = i_size_read(inode);
Trond Myklebust951a1432005-06-22 17:16:30 +00001377 if (new_isize != cur_isize) {
1378 /* Do we perhaps have any outstanding writes? */
1379 if (nfsi->npages == 0) {
1380 /* No, but did we race with nfs_end_data_update()? */
1381 if (verifier == nfsi->cache_change_attribute) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 inode->i_size = new_isize;
Trond Myklebust951a1432005-06-22 17:16:30 +00001383 invalid |= NFS_INO_INVALID_DATA;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 }
Trond Myklebust951a1432005-06-22 17:16:30 +00001385 invalid |= NFS_INO_INVALID_ATTR;
1386 } else if (new_isize > cur_isize) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 inode->i_size = new_isize;
1388 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1389 }
Trond Myklebust951a1432005-06-22 17:16:30 +00001390 dprintk("NFS: isize change on server for file %s/%ld\n",
1391 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392 }
1393
Trond Myklebust951a1432005-06-22 17:16:30 +00001394 /* Check if the mtime agrees */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1396 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
Trond Myklebust951a1432005-06-22 17:16:30 +00001397 dprintk("NFS: mtime change on server for file %s/%ld\n",
1398 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 if (!data_unstable)
1400 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1401 }
1402
1403 if ((fattr->valid & NFS_ATTR_FATTR_V4)
1404 && nfsi->change_attr != fattr->change_attr) {
Trond Myklebust951a1432005-06-22 17:16:30 +00001405 dprintk("NFS: change_attr change on server for file %s/%ld\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 inode->i_sb->s_id, inode->i_ino);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407 nfsi->change_attr = fattr->change_attr;
1408 if (!data_unstable)
Trond Myklebustada70d92005-06-22 17:16:22 +00001409 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001410 }
1411
Trond Myklebustada70d92005-06-22 17:16:22 +00001412 /* If ctime has changed we should definitely clear access+acl caches */
1413 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1414 if (!data_unstable)
1415 invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1416 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1417 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1419
1420 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) ||
1421 inode->i_uid != fattr->uid ||
1422 inode->i_gid != fattr->gid)
Trond Myklebustada70d92005-06-22 17:16:22 +00001423 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424
1425 inode->i_mode = fattr->mode;
1426 inode->i_nlink = fattr->nlink;
1427 inode->i_uid = fattr->uid;
1428 inode->i_gid = fattr->gid;
1429
1430 if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) {
1431 /*
1432 * report the blocks in 512byte units
1433 */
1434 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1435 inode->i_blksize = inode->i_sb->s_blocksize;
1436 } else {
1437 inode->i_blocks = fattr->du.nfs2.blocks;
1438 inode->i_blksize = fattr->du.nfs2.blocksize;
1439 }
1440
1441 /* Update attrtimeo value if we're out of the unstable period */
1442 if (invalid & NFS_INO_INVALID_ATTR) {
1443 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1444 nfsi->attrtimeo_timestamp = jiffies;
1445 } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) {
1446 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1447 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1448 nfsi->attrtimeo_timestamp = jiffies;
1449 }
1450 /* Don't invalidate the data if we were to blame */
1451 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1452 || S_ISLNK(inode->i_mode)))
1453 invalid &= ~NFS_INO_INVALID_DATA;
1454 if (!nfs_have_delegation(inode, FMODE_READ))
Chuck Lever55296802005-08-18 11:24:09 -07001455 nfsi->cache_validity |= invalid;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456
Chuck Leverdc592502005-08-18 11:24:12 -07001457 spin_unlock(&inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001458 return 0;
1459 out_changed:
1460 /*
1461 * Big trouble! The inode has become a different object.
1462 */
1463#ifdef NFS_PARANOIA
1464 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1465 __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode);
1466#endif
1467 /*
1468 * No need to worry about unhashing the dentry, as the
1469 * lookup validation will know that the inode is bad.
1470 * (But we fall through to invalidate the caches.)
1471 */
1472 nfs_invalidate_inode(inode);
1473 out_err:
Chuck Lever412d5822005-08-18 11:24:11 -07001474 set_bit(NFS_INO_STALE, &NFS_FLAGS(inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 return -ESTALE;
1476}
1477
1478/*
1479 * File system information
1480 */
1481
1482static int nfs_set_super(struct super_block *s, void *data)
1483{
1484 s->s_fs_info = data;
1485 return set_anon_super(s, data);
1486}
1487
1488static int nfs_compare_super(struct super_block *sb, void *data)
1489{
1490 struct nfs_server *server = data;
1491 struct nfs_server *old = NFS_SB(sb);
1492
1493 if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr)
1494 return 0;
1495 if (old->addr.sin_port != server->addr.sin_port)
1496 return 0;
1497 return !nfs_compare_fh(&old->fh, &server->fh);
1498}
1499
1500static struct super_block *nfs_get_sb(struct file_system_type *fs_type,
1501 int flags, const char *dev_name, void *raw_data)
1502{
1503 int error;
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001504 struct nfs_server *server = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001505 struct super_block *s;
1506 struct nfs_fh *root;
1507 struct nfs_mount_data *data = raw_data;
1508
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001509 s = ERR_PTR(-EINVAL);
1510 if (data == NULL) {
1511 dprintk("%s: missing data argument\n", __FUNCTION__);
1512 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 }
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001514 if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) {
1515 dprintk("%s: bad mount version\n", __FUNCTION__);
1516 goto out_err;
1517 }
1518 switch (data->version) {
1519 case 1:
1520 data->namlen = 0;
1521 case 2:
1522 data->bsize = 0;
1523 case 3:
1524 if (data->flags & NFS_MOUNT_VER3) {
1525 dprintk("%s: mount structure version %d does not support NFSv3\n",
1526 __FUNCTION__,
1527 data->version);
1528 goto out_err;
1529 }
1530 data->root.size = NFS2_FHSIZE;
1531 memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
1532 case 4:
1533 if (data->flags & NFS_MOUNT_SECFLAVOUR) {
1534 dprintk("%s: mount structure version %d does not support strong security\n",
1535 __FUNCTION__,
1536 data->version);
1537 goto out_err;
1538 }
1539 case 5:
1540 memset(data->context, 0, sizeof(data->context));
1541 }
1542#ifndef CONFIG_NFS_V3
1543 /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */
1544 s = ERR_PTR(-EPROTONOSUPPORT);
1545 if (data->flags & NFS_MOUNT_VER3) {
1546 dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__);
1547 goto out_err;
1548 }
1549#endif /* CONFIG_NFS_V3 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001551 s = ERR_PTR(-ENOMEM);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552 server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
1553 if (!server)
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001554 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 memset(server, 0, sizeof(struct nfs_server));
1556 /* Zero out the NFS state stuff */
1557 init_nfsv4_state(server);
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001558 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001559
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 root = &server->fh;
1561 if (data->flags & NFS_MOUNT_VER3)
1562 root->size = data->root.size;
1563 else
1564 root->size = NFS2_FHSIZE;
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001565 s = ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566 if (root->size > sizeof(root->data)) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001567 dprintk("%s: invalid root filehandle\n", __FUNCTION__);
1568 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 }
1570 memcpy(root->data, data->root.data, root->size);
1571
1572 /* We now require that the mount process passes the remote address */
1573 memcpy(&server->addr, &data->addr, sizeof(server->addr));
1574 if (server->addr.sin_addr.s_addr == INADDR_ANY) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001575 dprintk("%s: mount program didn't pass remote address!\n",
1576 __FUNCTION__);
1577 goto out_err;
1578 }
1579
1580 /* Fire up rpciod if not yet running */
1581 s = ERR_PTR(rpciod_up());
1582 if (IS_ERR(s)) {
1583 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1584 __FUNCTION__, PTR_ERR(s));
1585 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586 }
1587
1588 s = sget(fs_type, nfs_compare_super, nfs_set_super, server);
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001589 if (IS_ERR(s) || s->s_root)
1590 goto out_rpciod_down;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591
1592 s->s_flags = flags;
1593
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594 error = nfs_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
1595 if (error) {
1596 up_write(&s->s_umount);
1597 deactivate_super(s);
1598 return ERR_PTR(error);
1599 }
1600 s->s_flags |= MS_ACTIVE;
1601 return s;
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001602out_rpciod_down:
1603 rpciod_down();
1604out_err:
1605 kfree(server);
1606 return s;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607}
1608
1609static void nfs_kill_super(struct super_block *s)
1610{
1611 struct nfs_server *server = NFS_SB(s);
1612
1613 kill_anon_super(s);
1614
J. Bruce Fields6a192752005-06-22 17:16:23 +00001615 if (!IS_ERR(server->client))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 rpc_shutdown_client(server->client);
J. Bruce Fields6a192752005-06-22 17:16:23 +00001617 if (!IS_ERR(server->client_sys))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 rpc_shutdown_client(server->client_sys);
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001619 if (!IS_ERR(server->client_acl))
1620 rpc_shutdown_client(server->client_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621
1622 if (!(server->flags & NFS_MOUNT_NONLM))
1623 lockd_down(); /* release rpc.lockd */
1624
1625 rpciod_down(); /* release rpciod */
1626
1627 if (server->hostname != NULL)
1628 kfree(server->hostname);
1629 kfree(server);
1630}
1631
1632static struct file_system_type nfs_fs_type = {
1633 .owner = THIS_MODULE,
1634 .name = "nfs",
1635 .get_sb = nfs_get_sb,
1636 .kill_sb = nfs_kill_super,
1637 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1638};
1639
1640#ifdef CONFIG_NFS_V4
1641
1642static void nfs4_clear_inode(struct inode *);
1643
1644
1645static struct super_operations nfs4_sops = {
1646 .alloc_inode = nfs_alloc_inode,
1647 .destroy_inode = nfs_destroy_inode,
1648 .write_inode = nfs_write_inode,
1649 .delete_inode = nfs_delete_inode,
1650 .statfs = nfs_statfs,
1651 .clear_inode = nfs4_clear_inode,
1652 .umount_begin = nfs_umount_begin,
1653 .show_options = nfs_show_options,
1654};
1655
1656/*
1657 * Clean out any remaining NFSv4 state that might be left over due
1658 * to open() calls that passed nfs_atomic_lookup, but failed to call
1659 * nfs_open().
1660 */
1661static void nfs4_clear_inode(struct inode *inode)
1662{
1663 struct nfs_inode *nfsi = NFS_I(inode);
1664
1665 /* If we are holding a delegation, return it! */
1666 if (nfsi->delegation != NULL)
1667 nfs_inode_return_delegation(inode);
1668 /* First call standard NFS clear_inode() code */
1669 nfs_clear_inode(inode);
1670 /* Now clear out any remaining state */
1671 while (!list_empty(&nfsi->open_states)) {
1672 struct nfs4_state *state;
1673
1674 state = list_entry(nfsi->open_states.next,
1675 struct nfs4_state,
1676 inode_states);
1677 dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n",
1678 __FUNCTION__,
1679 inode->i_sb->s_id,
1680 (long long)NFS_FILEID(inode),
1681 state);
1682 BUG_ON(atomic_read(&state->count) != 1);
1683 nfs4_close_state(state, state->state);
1684 }
1685}
1686
1687
1688static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent)
1689{
1690 struct nfs_server *server;
1691 struct nfs4_client *clp = NULL;
1692 struct rpc_xprt *xprt = NULL;
1693 struct rpc_clnt *clnt = NULL;
1694 struct rpc_timeout timeparms;
1695 rpc_authflavor_t authflavour;
Chuck Levereab5c082005-08-11 16:25:14 -04001696 int err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001697
1698 sb->s_blocksize_bits = 0;
1699 sb->s_blocksize = 0;
1700 server = NFS_SB(sb);
1701 if (data->rsize != 0)
1702 server->rsize = nfs_block_size(data->rsize, NULL);
1703 if (data->wsize != 0)
1704 server->wsize = nfs_block_size(data->wsize, NULL);
1705 server->flags = data->flags & NFS_MOUNT_FLAGMASK;
1706 server->caps = NFS_CAP_ATOMIC_OPEN;
1707
1708 server->acregmin = data->acregmin*HZ;
1709 server->acregmax = data->acregmax*HZ;
1710 server->acdirmin = data->acdirmin*HZ;
1711 server->acdirmax = data->acdirmax*HZ;
1712
1713 server->rpc_ops = &nfs_v4_clientops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714
Chuck Levereab5c082005-08-11 16:25:14 -04001715 nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001716
1717 clp = nfs4_get_client(&server->addr.sin_addr);
1718 if (!clp) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001719 dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720 return -EIO;
1721 }
1722
1723 /* Now create transport and client */
1724 authflavour = RPC_AUTH_UNIX;
1725 if (data->auth_flavourlen != 0) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001726 if (data->auth_flavourlen != 1) {
1727 dprintk("%s: Invalid number of RPC auth flavours %d.\n",
1728 __FUNCTION__, data->auth_flavourlen);
1729 err = -EINVAL;
1730 goto out_fail;
1731 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) {
1733 err = -EFAULT;
1734 goto out_fail;
1735 }
1736 }
1737
1738 down_write(&clp->cl_sem);
J. Bruce Fields6a192752005-06-22 17:16:23 +00001739 if (IS_ERR(clp->cl_rpcclient)) {
Chuck Levereab5c082005-08-11 16:25:14 -04001740 xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 if (IS_ERR(xprt)) {
1742 up_write(&clp->cl_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 err = PTR_ERR(xprt);
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001744 dprintk("%s: cannot create RPC transport. Error = %d\n",
1745 __FUNCTION__, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 goto out_fail;
1747 }
1748 clnt = rpc_create_client(xprt, server->hostname, &nfs_program,
1749 server->rpc_ops->version, authflavour);
1750 if (IS_ERR(clnt)) {
1751 up_write(&clp->cl_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 err = PTR_ERR(clnt);
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001753 dprintk("%s: cannot create RPC client. Error = %d\n",
1754 __FUNCTION__, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 goto out_fail;
1756 }
1757 clnt->cl_intr = 1;
1758 clnt->cl_softrtry = 1;
1759 clnt->cl_chatty = 1;
1760 clp->cl_rpcclient = clnt;
1761 clp->cl_cred = rpcauth_lookupcred(clnt->cl_auth, 0);
1762 if (IS_ERR(clp->cl_cred)) {
1763 up_write(&clp->cl_sem);
1764 err = PTR_ERR(clp->cl_cred);
1765 clp->cl_cred = NULL;
1766 goto out_fail;
1767 }
1768 memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr));
1769 nfs_idmap_new(clp);
1770 }
1771 if (list_empty(&clp->cl_superblocks)) {
1772 err = nfs4_init_client(clp);
1773 if (err != 0) {
1774 up_write(&clp->cl_sem);
1775 goto out_fail;
1776 }
1777 }
1778 list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks);
1779 clnt = rpc_clone_client(clp->cl_rpcclient);
1780 if (!IS_ERR(clnt))
1781 server->nfs4_state = clp;
1782 up_write(&clp->cl_sem);
1783 clp = NULL;
1784
1785 if (IS_ERR(clnt)) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001786 err = PTR_ERR(clnt);
1787 dprintk("%s: cannot create RPC client. Error = %d\n",
1788 __FUNCTION__, err);
1789 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 }
1791
1792 server->client = clnt;
1793
1794 if (server->nfs4_state->cl_idmap == NULL) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001795 dprintk("%s: failed to create idmapper.\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796 return -ENOMEM;
1797 }
1798
1799 if (clnt->cl_auth->au_flavor != authflavour) {
J. Bruce Fields6a192752005-06-22 17:16:23 +00001800 struct rpc_auth *auth;
1801
1802 auth = rpcauth_create(authflavour, clnt);
1803 if (IS_ERR(auth)) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001804 dprintk("%s: couldn't create credcache!\n", __FUNCTION__);
J. Bruce Fields6a192752005-06-22 17:16:23 +00001805 return PTR_ERR(auth);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806 }
1807 }
1808
1809 sb->s_time_gran = 1;
1810
1811 sb->s_op = &nfs4_sops;
1812 err = nfs_sb_init(sb, authflavour);
1813 if (err == 0)
1814 return 0;
1815out_fail:
1816 if (clp)
1817 nfs4_put_client(clp);
1818 return err;
1819}
1820
1821static int nfs4_compare_super(struct super_block *sb, void *data)
1822{
1823 struct nfs_server *server = data;
1824 struct nfs_server *old = NFS_SB(sb);
1825
1826 if (strcmp(server->hostname, old->hostname) != 0)
1827 return 0;
1828 if (strcmp(server->mnt_path, old->mnt_path) != 0)
1829 return 0;
1830 return 1;
1831}
1832
1833static void *
1834nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen)
1835{
1836 void *p = NULL;
1837
1838 if (!src->len)
1839 return ERR_PTR(-EINVAL);
1840 if (src->len < maxlen)
1841 maxlen = src->len;
1842 if (dst == NULL) {
1843 p = dst = kmalloc(maxlen + 1, GFP_KERNEL);
1844 if (p == NULL)
1845 return ERR_PTR(-ENOMEM);
1846 }
1847 if (copy_from_user(dst, src->data, maxlen)) {
1848 if (p != NULL)
1849 kfree(p);
1850 return ERR_PTR(-EFAULT);
1851 }
1852 dst[maxlen] = '\0';
1853 return dst;
1854}
1855
1856static struct super_block *nfs4_get_sb(struct file_system_type *fs_type,
1857 int flags, const char *dev_name, void *raw_data)
1858{
1859 int error;
1860 struct nfs_server *server;
1861 struct super_block *s;
1862 struct nfs4_mount_data *data = raw_data;
1863 void *p;
1864
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001865 if (data == NULL) {
1866 dprintk("%s: missing data argument\n", __FUNCTION__);
1867 return ERR_PTR(-EINVAL);
1868 }
1869 if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) {
1870 dprintk("%s: bad mount version\n", __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001871 return ERR_PTR(-EINVAL);
1872 }
1873
1874 server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL);
1875 if (!server)
1876 return ERR_PTR(-ENOMEM);
1877 memset(server, 0, sizeof(struct nfs_server));
1878 /* Zero out the NFS state stuff */
1879 init_nfsv4_state(server);
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +00001880 server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001881
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 p = nfs_copy_user_string(NULL, &data->hostname, 256);
1883 if (IS_ERR(p))
1884 goto out_err;
1885 server->hostname = p;
1886
1887 p = nfs_copy_user_string(NULL, &data->mnt_path, 1024);
1888 if (IS_ERR(p))
1889 goto out_err;
1890 server->mnt_path = p;
1891
1892 p = nfs_copy_user_string(server->ip_addr, &data->client_addr,
1893 sizeof(server->ip_addr) - 1);
1894 if (IS_ERR(p))
1895 goto out_err;
1896
1897 /* We now require that the mount process passes the remote address */
1898 if (data->host_addrlen != sizeof(server->addr)) {
1899 s = ERR_PTR(-EINVAL);
1900 goto out_free;
1901 }
1902 if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) {
1903 s = ERR_PTR(-EFAULT);
1904 goto out_free;
1905 }
1906 if (server->addr.sin_family != AF_INET ||
1907 server->addr.sin_addr.s_addr == INADDR_ANY) {
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001908 dprintk("%s: mount program didn't pass remote IP address!\n",
1909 __FUNCTION__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 s = ERR_PTR(-EINVAL);
1911 goto out_free;
1912 }
1913
Trond Myklebust9085bbc2005-06-22 17:16:20 +00001914 /* Fire up rpciod if not yet running */
1915 s = ERR_PTR(rpciod_up());
1916 if (IS_ERR(s)) {
1917 dprintk("%s: couldn't start rpciod! Error = %ld\n",
1918 __FUNCTION__, PTR_ERR(s));
1919 goto out_free;
1920 }
1921
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 s = sget(fs_type, nfs4_compare_super, nfs_set_super, server);
1923
1924 if (IS_ERR(s) || s->s_root)
1925 goto out_free;
1926
1927 s->s_flags = flags;
1928
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 error = nfs4_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0);
1930 if (error) {
1931 up_write(&s->s_umount);
1932 deactivate_super(s);
1933 return ERR_PTR(error);
1934 }
1935 s->s_flags |= MS_ACTIVE;
1936 return s;
1937out_err:
1938 s = (struct super_block *)p;
1939out_free:
1940 if (server->mnt_path)
1941 kfree(server->mnt_path);
1942 if (server->hostname)
1943 kfree(server->hostname);
1944 kfree(server);
1945 return s;
1946}
1947
1948static void nfs4_kill_super(struct super_block *sb)
1949{
1950 struct nfs_server *server = NFS_SB(sb);
1951
1952 nfs_return_all_delegations(sb);
1953 kill_anon_super(sb);
1954
1955 nfs4_renewd_prepare_shutdown(server);
1956
1957 if (server->client != NULL && !IS_ERR(server->client))
1958 rpc_shutdown_client(server->client);
1959 rpciod_down(); /* release rpciod */
1960
1961 destroy_nfsv4_state(server);
1962
1963 if (server->hostname != NULL)
1964 kfree(server->hostname);
1965 kfree(server);
1966}
1967
1968static struct file_system_type nfs4_fs_type = {
1969 .owner = THIS_MODULE,
1970 .name = "nfs4",
1971 .get_sb = nfs4_get_sb,
1972 .kill_sb = nfs4_kill_super,
1973 .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA,
1974};
1975
1976#define nfs4_init_once(nfsi) \
1977 do { \
1978 INIT_LIST_HEAD(&(nfsi)->open_states); \
1979 nfsi->delegation = NULL; \
1980 nfsi->delegation_state = 0; \
1981 init_rwsem(&nfsi->rwsem); \
1982 } while(0)
1983#define register_nfs4fs() register_filesystem(&nfs4_fs_type)
1984#define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
1985#else
1986#define nfs4_init_once(nfsi) \
1987 do { } while (0)
1988#define register_nfs4fs() (0)
1989#define unregister_nfs4fs()
1990#endif
1991
1992extern int nfs_init_nfspagecache(void);
1993extern void nfs_destroy_nfspagecache(void);
1994extern int nfs_init_readpagecache(void);
1995extern void nfs_destroy_readpagecache(void);
1996extern int nfs_init_writepagecache(void);
1997extern void nfs_destroy_writepagecache(void);
1998#ifdef CONFIG_NFS_DIRECTIO
1999extern int nfs_init_directcache(void);
2000extern void nfs_destroy_directcache(void);
2001#endif
2002
2003static kmem_cache_t * nfs_inode_cachep;
2004
2005static struct inode *nfs_alloc_inode(struct super_block *sb)
2006{
2007 struct nfs_inode *nfsi;
2008 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL);
2009 if (!nfsi)
2010 return NULL;
Chuck Lever55296802005-08-18 11:24:09 -07002011 nfsi->flags = 0UL;
2012 nfsi->cache_validity = 0UL;
Trond Myklebust458818e2005-06-22 17:16:27 +00002013#ifdef CONFIG_NFS_V3_ACL
2014 nfsi->acl_access = ERR_PTR(-EAGAIN);
2015 nfsi->acl_default = ERR_PTR(-EAGAIN);
2016#endif
J. Bruce Fieldse50a1c22005-06-22 17:16:23 +00002017#ifdef CONFIG_NFS_V4
2018 nfsi->nfs4_acl = NULL;
2019#endif /* CONFIG_NFS_V4 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020 return &nfsi->vfs_inode;
2021}
2022
2023static void nfs_destroy_inode(struct inode *inode)
2024{
2025 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2026}
2027
2028static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
2029{
2030 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2031
2032 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
2033 SLAB_CTOR_CONSTRUCTOR) {
2034 inode_init_once(&nfsi->vfs_inode);
2035 spin_lock_init(&nfsi->req_lock);
2036 INIT_LIST_HEAD(&nfsi->dirty);
2037 INIT_LIST_HEAD(&nfsi->commit);
2038 INIT_LIST_HEAD(&nfsi->open_files);
2039 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
2040 atomic_set(&nfsi->data_updates, 0);
2041 nfsi->ndirty = 0;
2042 nfsi->ncommit = 0;
2043 nfsi->npages = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002044 nfs4_init_once(nfsi);
2045 }
2046}
2047
Adrian Bunk75c96f82005-05-05 16:16:09 -07002048static int nfs_init_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002049{
2050 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2051 sizeof(struct nfs_inode),
2052 0, SLAB_RECLAIM_ACCOUNT,
2053 init_once, NULL);
2054 if (nfs_inode_cachep == NULL)
2055 return -ENOMEM;
2056
2057 return 0;
2058}
2059
Adrian Bunk75c96f82005-05-05 16:16:09 -07002060static void nfs_destroy_inodecache(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061{
2062 if (kmem_cache_destroy(nfs_inode_cachep))
2063 printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n");
2064}
2065
2066/*
2067 * Initialize NFS
2068 */
2069static int __init init_nfs_fs(void)
2070{
2071 int err;
2072
2073 err = nfs_init_nfspagecache();
2074 if (err)
2075 goto out4;
2076
2077 err = nfs_init_inodecache();
2078 if (err)
2079 goto out3;
2080
2081 err = nfs_init_readpagecache();
2082 if (err)
2083 goto out2;
2084
2085 err = nfs_init_writepagecache();
2086 if (err)
2087 goto out1;
2088
2089#ifdef CONFIG_NFS_DIRECTIO
2090 err = nfs_init_directcache();
2091 if (err)
2092 goto out0;
2093#endif
2094
2095#ifdef CONFIG_PROC_FS
2096 rpc_proc_register(&nfs_rpcstat);
2097#endif
2098 err = register_filesystem(&nfs_fs_type);
2099 if (err)
2100 goto out;
2101 if ((err = register_nfs4fs()) != 0)
2102 goto out;
2103 return 0;
2104out:
2105#ifdef CONFIG_PROC_FS
2106 rpc_proc_unregister("nfs");
2107#endif
2108 nfs_destroy_writepagecache();
2109#ifdef CONFIG_NFS_DIRECTIO
2110out0:
2111 nfs_destroy_directcache();
2112#endif
2113out1:
2114 nfs_destroy_readpagecache();
2115out2:
2116 nfs_destroy_inodecache();
2117out3:
2118 nfs_destroy_nfspagecache();
2119out4:
2120 return err;
2121}
2122
2123static void __exit exit_nfs_fs(void)
2124{
2125#ifdef CONFIG_NFS_DIRECTIO
2126 nfs_destroy_directcache();
2127#endif
2128 nfs_destroy_writepagecache();
2129 nfs_destroy_readpagecache();
2130 nfs_destroy_inodecache();
2131 nfs_destroy_nfspagecache();
2132#ifdef CONFIG_PROC_FS
2133 rpc_proc_unregister("nfs");
2134#endif
2135 unregister_filesystem(&nfs_fs_type);
2136 unregister_nfs4fs();
2137}
2138
2139/* Not quite true; I just maintain it */
2140MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2141MODULE_LICENSE("GPL");
2142
2143module_init(init_nfs_fs)
2144module_exit(exit_nfs_fs)