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1da177e4 LT |
1 | /* |
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> | |
4ece3a2d | 29 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
30 | #include <linux/nfs_fs.h> |
31 | #include <linux/nfs_mount.h> | |
32 | #include <linux/nfs4_mount.h> | |
33 | #include <linux/lockd/bind.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/seq_file.h> | |
36 | #include <linux/mount.h> | |
37 | #include <linux/nfs_idmap.h> | |
38 | #include <linux/vfs.h> | |
39 | ||
40 | #include <asm/system.h> | |
41 | #include <asm/uaccess.h> | |
42 | ||
4ce79717 | 43 | #include "nfs4_fs.h" |
a72b4422 | 44 | #include "callback.h" |
1da177e4 | 45 | #include "delegation.h" |
d9ef5a8c | 46 | #include "iostat.h" |
1da177e4 LT |
47 | |
48 | #define NFSDBG_FACILITY NFSDBG_VFS | |
49 | #define NFS_PARANOIA 1 | |
50 | ||
51 | /* Maximum number of readahead requests | |
52 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
53 | * their needs. People that do NFS over a slow network, might for | |
54 | * instance want to reduce it to something closer to 1 for improved | |
55 | * interactive response. | |
56 | */ | |
57 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
58 | ||
59 | static void nfs_invalidate_inode(struct inode *); | |
24aa1fe6 | 60 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 LT |
61 | |
62 | static struct inode *nfs_alloc_inode(struct super_block *sb); | |
63 | static void nfs_destroy_inode(struct inode *); | |
64 | static int nfs_write_inode(struct inode *,int); | |
65 | static void nfs_delete_inode(struct inode *); | |
66 | static void nfs_clear_inode(struct inode *); | |
67 | static void nfs_umount_begin(struct super_block *); | |
726c3342 | 68 | static int nfs_statfs(struct dentry *, struct kstatfs *); |
1da177e4 | 69 | static int nfs_show_options(struct seq_file *, struct vfsmount *); |
d9ef5a8c | 70 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); |
ada70d94 | 71 | static void nfs_zap_acl_cache(struct inode *); |
1da177e4 LT |
72 | |
73 | static struct rpc_program nfs_program; | |
74 | ||
75 | static struct super_operations nfs_sops = { | |
76 | .alloc_inode = nfs_alloc_inode, | |
77 | .destroy_inode = nfs_destroy_inode, | |
78 | .write_inode = nfs_write_inode, | |
79 | .delete_inode = nfs_delete_inode, | |
80 | .statfs = nfs_statfs, | |
81 | .clear_inode = nfs_clear_inode, | |
82 | .umount_begin = nfs_umount_begin, | |
83 | .show_options = nfs_show_options, | |
d9ef5a8c | 84 | .show_stats = nfs_show_stats, |
1da177e4 LT |
85 | }; |
86 | ||
87 | /* | |
88 | * RPC cruft for NFS | |
89 | */ | |
90 | static struct rpc_stat nfs_rpcstat = { | |
91 | .program = &nfs_program | |
92 | }; | |
93 | static struct rpc_version * nfs_version[] = { | |
94 | NULL, | |
95 | NULL, | |
96 | &nfs_version2, | |
97 | #if defined(CONFIG_NFS_V3) | |
98 | &nfs_version3, | |
99 | #elif defined(CONFIG_NFS_V4) | |
100 | NULL, | |
101 | #endif | |
102 | #if defined(CONFIG_NFS_V4) | |
103 | &nfs_version4, | |
104 | #endif | |
105 | }; | |
106 | ||
107 | static struct rpc_program nfs_program = { | |
108 | .name = "nfs", | |
109 | .number = NFS_PROGRAM, | |
e8c96f8c | 110 | .nrvers = ARRAY_SIZE(nfs_version), |
1da177e4 LT |
111 | .version = nfs_version, |
112 | .stats = &nfs_rpcstat, | |
113 | .pipe_dir_name = "/nfs", | |
114 | }; | |
115 | ||
b7fa0554 AG |
116 | #ifdef CONFIG_NFS_V3_ACL |
117 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
118 | static struct rpc_version * nfsacl_version[] = { | |
119 | [3] = &nfsacl_version3, | |
120 | }; | |
121 | ||
122 | struct rpc_program nfsacl_program = { | |
123 | .name = "nfsacl", | |
124 | .number = NFS_ACL_PROGRAM, | |
e8c96f8c | 125 | .nrvers = ARRAY_SIZE(nfsacl_version), |
b7fa0554 AG |
126 | .version = nfsacl_version, |
127 | .stats = &nfsacl_rpcstat, | |
128 | }; | |
129 | #endif /* CONFIG_NFS_V3_ACL */ | |
130 | ||
1da177e4 LT |
131 | static inline unsigned long |
132 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
133 | { | |
134 | return nfs_fileid_to_ino_t(fattr->fileid); | |
135 | } | |
136 | ||
137 | static int | |
138 | nfs_write_inode(struct inode *inode, int sync) | |
139 | { | |
c42de9dd | 140 | int flags = sync ? FLUSH_SYNC : 0; |
1da177e4 LT |
141 | int ret; |
142 | ||
3da28eb1 | 143 | ret = nfs_commit_inode(inode, flags); |
1da177e4 LT |
144 | if (ret < 0) |
145 | return ret; | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static void | |
150 | nfs_delete_inode(struct inode * inode) | |
151 | { | |
152 | dprintk("NFS: delete_inode(%s/%ld)\n", inode->i_sb->s_id, inode->i_ino); | |
153 | ||
fef26658 MF |
154 | truncate_inode_pages(&inode->i_data, 0); |
155 | ||
1da177e4 LT |
156 | nfs_wb_all(inode); |
157 | /* | |
158 | * The following should never happen... | |
159 | */ | |
160 | if (nfs_have_writebacks(inode)) { | |
161 | printk(KERN_ERR "nfs_delete_inode: inode %ld has pending RPC requests\n", inode->i_ino); | |
162 | } | |
163 | ||
164 | clear_inode(inode); | |
165 | } | |
166 | ||
1da177e4 LT |
167 | static void |
168 | nfs_clear_inode(struct inode *inode) | |
169 | { | |
170 | struct nfs_inode *nfsi = NFS_I(inode); | |
171 | struct rpc_cred *cred; | |
172 | ||
173 | nfs_wb_all(inode); | |
174 | BUG_ON (!list_empty(&nfsi->open_files)); | |
ada70d94 | 175 | nfs_zap_acl_cache(inode); |
1da177e4 LT |
176 | cred = nfsi->cache_access.cred; |
177 | if (cred) | |
178 | put_rpccred(cred); | |
179 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); | |
180 | } | |
181 | ||
182 | void | |
183 | nfs_umount_begin(struct super_block *sb) | |
184 | { | |
6a19275a | 185 | struct rpc_clnt *rpc = NFS_SB(sb)->client; |
1da177e4 LT |
186 | |
187 | /* -EIO all pending I/O */ | |
6a19275a | 188 | if (!IS_ERR(rpc)) |
1da177e4 | 189 | rpc_killall_tasks(rpc); |
b7fa0554 AG |
190 | rpc = NFS_SB(sb)->client_acl; |
191 | if (!IS_ERR(rpc)) | |
192 | rpc_killall_tasks(rpc); | |
1da177e4 LT |
193 | } |
194 | ||
195 | ||
196 | static inline unsigned long | |
197 | nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
198 | { | |
199 | /* make sure blocksize is a power of two */ | |
200 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
201 | unsigned char nrbits; | |
202 | ||
203 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
204 | ; | |
205 | bsize = 1 << nrbits; | |
206 | if (nrbitsp) | |
207 | *nrbitsp = nrbits; | |
208 | } | |
209 | ||
210 | return bsize; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Calculate the number of 512byte blocks used. | |
215 | */ | |
216 | static inline unsigned long | |
217 | nfs_calc_block_size(u64 tsize) | |
218 | { | |
219 | loff_t used = (tsize + 511) >> 9; | |
220 | return (used > ULONG_MAX) ? ULONG_MAX : used; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Compute and set NFS server blocksize | |
225 | */ | |
226 | static inline unsigned long | |
227 | nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
228 | { | |
40859d7e CL |
229 | if (bsize < NFS_MIN_FILE_IO_SIZE) |
230 | bsize = NFS_DEF_FILE_IO_SIZE; | |
231 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
232 | bsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 LT |
233 | |
234 | return nfs_block_bits(bsize, nrbitsp); | |
235 | } | |
236 | ||
237 | /* | |
238 | * Obtain the root inode of the file system. | |
239 | */ | |
240 | static struct inode * | |
241 | nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) | |
242 | { | |
243 | struct nfs_server *server = NFS_SB(sb); | |
1da177e4 LT |
244 | int error; |
245 | ||
246 | error = server->rpc_ops->getroot(server, rootfh, fsinfo); | |
247 | if (error < 0) { | |
248 | dprintk("nfs_get_root: getattr error = %d\n", -error); | |
249 | return ERR_PTR(error); | |
250 | } | |
251 | ||
03f28e3a | 252 | return nfs_fhget(sb, rootfh, fsinfo->fattr); |
1da177e4 LT |
253 | } |
254 | ||
255 | /* | |
256 | * Do NFS version-independent mount processing, and sanity checking | |
257 | */ | |
258 | static int | |
259 | nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) | |
260 | { | |
261 | struct nfs_server *server; | |
262 | struct inode *root_inode; | |
263 | struct nfs_fattr fattr; | |
264 | struct nfs_fsinfo fsinfo = { | |
265 | .fattr = &fattr, | |
266 | }; | |
267 | struct nfs_pathconf pathinfo = { | |
268 | .fattr = &fattr, | |
269 | }; | |
270 | int no_root_error = 0; | |
271 | unsigned long max_rpc_payload; | |
272 | ||
273 | /* We probably want something more informative here */ | |
274 | snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
275 | ||
276 | server = NFS_SB(sb); | |
277 | ||
278 | sb->s_magic = NFS_SUPER_MAGIC; | |
279 | ||
01d0ae8b TM |
280 | server->io_stats = nfs_alloc_iostats(); |
281 | if (server->io_stats == NULL) | |
282 | return -ENOMEM; | |
283 | ||
1da177e4 LT |
284 | root_inode = nfs_get_root(sb, &server->fh, &fsinfo); |
285 | /* Did getting the root inode fail? */ | |
286 | if (IS_ERR(root_inode)) { | |
287 | no_root_error = PTR_ERR(root_inode); | |
288 | goto out_no_root; | |
289 | } | |
290 | sb->s_root = d_alloc_root(root_inode); | |
291 | if (!sb->s_root) { | |
292 | no_root_error = -ENOMEM; | |
293 | goto out_no_root; | |
294 | } | |
295 | sb->s_root->d_op = server->rpc_ops->dentry_ops; | |
296 | ||
67ec9f46 CL |
297 | /* mount time stamp, in seconds */ |
298 | server->mount_time = jiffies; | |
299 | ||
1da177e4 LT |
300 | /* Get some general file system info */ |
301 | if (server->namelen == 0 && | |
302 | server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) | |
303 | server->namelen = pathinfo.max_namelen; | |
304 | /* Work out a lot of parameters */ | |
305 | if (server->rsize == 0) | |
306 | server->rsize = nfs_block_size(fsinfo.rtpref, NULL); | |
307 | if (server->wsize == 0) | |
308 | server->wsize = nfs_block_size(fsinfo.wtpref, NULL); | |
309 | ||
310 | if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax) | |
311 | server->rsize = nfs_block_size(fsinfo.rtmax, NULL); | |
312 | if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax) | |
313 | server->wsize = nfs_block_size(fsinfo.wtmax, NULL); | |
314 | ||
315 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
316 | if (server->rsize > max_rpc_payload) | |
317 | server->rsize = max_rpc_payload; | |
40859d7e CL |
318 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) |
319 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 | 320 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
1da177e4 | 321 | |
40859d7e CL |
322 | if (server->wsize > max_rpc_payload) |
323 | server->wsize = max_rpc_payload; | |
324 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
325 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 | 326 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
1da177e4 LT |
327 | |
328 | if (sb->s_blocksize == 0) | |
329 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
330 | &sb->s_blocksize_bits); | |
331 | server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL); | |
332 | ||
333 | server->dtsize = nfs_block_size(fsinfo.dtpref, NULL); | |
334 | if (server->dtsize > PAGE_CACHE_SIZE) | |
335 | server->dtsize = PAGE_CACHE_SIZE; | |
336 | if (server->dtsize > server->rsize) | |
337 | server->dtsize = server->rsize; | |
338 | ||
339 | if (server->flags & NFS_MOUNT_NOAC) { | |
340 | server->acregmin = server->acregmax = 0; | |
341 | server->acdirmin = server->acdirmax = 0; | |
342 | sb->s_flags |= MS_SYNCHRONOUS; | |
343 | } | |
344 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
345 | ||
346 | sb->s_maxbytes = fsinfo.maxfilesize; | |
347 | if (sb->s_maxbytes > MAX_LFS_FILESIZE) | |
348 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
349 | ||
350 | server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; | |
351 | server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0; | |
352 | ||
353 | /* We're airborne Set socket buffersize */ | |
354 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
355 | return 0; | |
356 | /* Yargs. It didn't work out. */ | |
357 | out_no_root: | |
358 | dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error); | |
359 | if (!IS_ERR(root_inode)) | |
360 | iput(root_inode); | |
361 | return no_root_error; | |
362 | } | |
363 | ||
eab5c084 CL |
364 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) |
365 | { | |
366 | to->to_initval = timeo * HZ / 10; | |
367 | to->to_retries = retrans; | |
368 | if (!to->to_retries) | |
369 | to->to_retries = 2; | |
370 | ||
371 | switch (proto) { | |
372 | case IPPROTO_TCP: | |
373 | if (!to->to_initval) | |
374 | to->to_initval = 60 * HZ; | |
03bf4b70 CL |
375 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
376 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
eab5c084 CL |
377 | to->to_increment = to->to_initval; |
378 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
379 | to->to_exponential = 0; | |
380 | break; | |
381 | case IPPROTO_UDP: | |
382 | default: | |
383 | if (!to->to_initval) | |
384 | to->to_initval = 11 * HZ / 10; | |
03bf4b70 CL |
385 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
386 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
387 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
eab5c084 CL |
388 | to->to_exponential = 1; |
389 | break; | |
390 | } | |
391 | } | |
392 | ||
1da177e4 LT |
393 | /* |
394 | * Create an RPC client handle. | |
395 | */ | |
396 | static struct rpc_clnt * | |
397 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) | |
398 | { | |
399 | struct rpc_timeout timeparms; | |
400 | struct rpc_xprt *xprt = NULL; | |
401 | struct rpc_clnt *clnt = NULL; | |
eab5c084 | 402 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; |
1da177e4 | 403 | |
eab5c084 | 404 | nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); |
1da177e4 | 405 | |
7a480e25 CL |
406 | server->retrans_timeo = timeparms.to_initval; |
407 | server->retrans_count = timeparms.to_retries; | |
408 | ||
1da177e4 | 409 | /* create transport and client */ |
eab5c084 | 410 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
1da177e4 | 411 | if (IS_ERR(xprt)) { |
9085bbcb TM |
412 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
413 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
414 | return (struct rpc_clnt *)xprt; |
415 | } | |
416 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
417 | server->rpc_ops->version, data->pseudoflavor); | |
418 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
419 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
420 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
421 | goto out_fail; |
422 | } | |
423 | ||
424 | clnt->cl_intr = 1; | |
425 | clnt->cl_softrtry = 1; | |
1da177e4 LT |
426 | |
427 | return clnt; | |
428 | ||
429 | out_fail: | |
1da177e4 LT |
430 | return clnt; |
431 | } | |
432 | ||
433 | /* | |
434 | * The way this works is that the mount process passes a structure | |
435 | * in the data argument which contains the server's IP address | |
436 | * and the root file handle obtained from the server's mount | |
437 | * daemon. We stash these away in the private superblock fields. | |
438 | */ | |
439 | static int | |
440 | nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent) | |
441 | { | |
442 | struct nfs_server *server; | |
443 | rpc_authflavor_t authflavor; | |
444 | ||
445 | server = NFS_SB(sb); | |
446 | sb->s_blocksize_bits = 0; | |
447 | sb->s_blocksize = 0; | |
448 | if (data->bsize) | |
449 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
450 | if (data->rsize) | |
451 | server->rsize = nfs_block_size(data->rsize, NULL); | |
452 | if (data->wsize) | |
453 | server->wsize = nfs_block_size(data->wsize, NULL); | |
454 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
455 | ||
456 | server->acregmin = data->acregmin*HZ; | |
457 | server->acregmax = data->acregmax*HZ; | |
458 | server->acdirmin = data->acdirmin*HZ; | |
459 | server->acdirmax = data->acdirmax*HZ; | |
460 | ||
461 | /* Start lockd here, before we might error out */ | |
462 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
463 | lockd_up(); | |
464 | ||
465 | server->namelen = data->namlen; | |
466 | server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL); | |
467 | if (!server->hostname) | |
468 | return -ENOMEM; | |
469 | strcpy(server->hostname, data->hostname); | |
470 | ||
471 | /* Check NFS protocol revision and initialize RPC op vector | |
472 | * and file handle pool. */ | |
1da177e4 | 473 | #ifdef CONFIG_NFS_V3 |
9085bbcb | 474 | if (server->flags & NFS_MOUNT_VER3) { |
1da177e4 LT |
475 | server->rpc_ops = &nfs_v3_clientops; |
476 | server->caps |= NFS_CAP_READDIRPLUS; | |
1da177e4 LT |
477 | } else { |
478 | server->rpc_ops = &nfs_v2_clientops; | |
479 | } | |
9085bbcb TM |
480 | #else |
481 | server->rpc_ops = &nfs_v2_clientops; | |
482 | #endif | |
1da177e4 LT |
483 | |
484 | /* Fill in pseudoflavor for mount version < 5 */ | |
485 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) | |
486 | data->pseudoflavor = RPC_AUTH_UNIX; | |
487 | authflavor = data->pseudoflavor; /* save for sb_init() */ | |
488 | /* XXX maybe we want to add a server->pseudoflavor field */ | |
489 | ||
490 | /* Create RPC client handles */ | |
491 | server->client = nfs_create_client(server, data); | |
492 | if (IS_ERR(server->client)) | |
493 | return PTR_ERR(server->client); | |
494 | /* RFC 2623, sec 2.3.2 */ | |
495 | if (authflavor != RPC_AUTH_UNIX) { | |
6a19275a BF |
496 | struct rpc_auth *auth; |
497 | ||
1da177e4 LT |
498 | server->client_sys = rpc_clone_client(server->client); |
499 | if (IS_ERR(server->client_sys)) | |
500 | return PTR_ERR(server->client_sys); | |
6a19275a BF |
501 | auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys); |
502 | if (IS_ERR(auth)) | |
503 | return PTR_ERR(auth); | |
1da177e4 LT |
504 | } else { |
505 | atomic_inc(&server->client->cl_count); | |
506 | server->client_sys = server->client; | |
507 | } | |
1da177e4 | 508 | if (server->flags & NFS_MOUNT_VER3) { |
b7fa0554 AG |
509 | #ifdef CONFIG_NFS_V3_ACL |
510 | if (!(server->flags & NFS_MOUNT_NOACL)) { | |
511 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
512 | /* No errors! Assume that Sun nfsacls are supported */ | |
513 | if (!IS_ERR(server->client_acl)) | |
514 | server->caps |= NFS_CAP_ACLS; | |
515 | } | |
516 | #else | |
517 | server->flags &= ~NFS_MOUNT_NOACL; | |
518 | #endif /* CONFIG_NFS_V3_ACL */ | |
055ffbea AG |
519 | /* |
520 | * The VFS shouldn't apply the umask to mode bits. We will | |
521 | * do so ourselves when necessary. | |
522 | */ | |
523 | sb->s_flags |= MS_POSIXACL; | |
1da177e4 LT |
524 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) |
525 | server->namelen = NFS3_MAXNAMLEN; | |
526 | sb->s_time_gran = 1; | |
527 | } else { | |
528 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
529 | server->namelen = NFS2_MAXNAMLEN; | |
530 | } | |
531 | ||
532 | sb->s_op = &nfs_sops; | |
533 | return nfs_sb_init(sb, authflavor); | |
534 | } | |
535 | ||
536 | static int | |
726c3342 | 537 | nfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 538 | { |
726c3342 | 539 | struct super_block *sb = dentry->d_sb; |
1da177e4 LT |
540 | struct nfs_server *server = NFS_SB(sb); |
541 | unsigned char blockbits; | |
542 | unsigned long blockres; | |
543 | struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode); | |
544 | struct nfs_fattr fattr; | |
545 | struct nfs_fsstat res = { | |
546 | .fattr = &fattr, | |
547 | }; | |
548 | int error; | |
549 | ||
550 | lock_kernel(); | |
551 | ||
552 | error = server->rpc_ops->statfs(server, rootfh, &res); | |
553 | buf->f_type = NFS_SUPER_MAGIC; | |
554 | if (error < 0) | |
555 | goto out_err; | |
556 | ||
557 | /* | |
558 | * Current versions of glibc do not correctly handle the | |
559 | * case where f_frsize != f_bsize. Eventually we want to | |
560 | * report the value of wtmult in this field. | |
561 | */ | |
562 | buf->f_frsize = sb->s_blocksize; | |
563 | ||
564 | /* | |
565 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
566 | * are reported in units of f_frsize. Linux hasn't had | |
567 | * an f_frsize field in its statfs struct until recently, | |
568 | * thus historically Linux's sys_statfs reports these | |
569 | * fields in units of f_bsize. | |
570 | */ | |
571 | buf->f_bsize = sb->s_blocksize; | |
572 | blockbits = sb->s_blocksize_bits; | |
573 | blockres = (1 << blockbits) - 1; | |
574 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
575 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
576 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
577 | ||
578 | buf->f_files = res.tfiles; | |
579 | buf->f_ffree = res.afiles; | |
580 | ||
581 | buf->f_namelen = server->namelen; | |
582 | out: | |
583 | unlock_kernel(); | |
1da177e4 LT |
584 | return 0; |
585 | ||
586 | out_err: | |
dc20f803 | 587 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); |
1da177e4 LT |
588 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; |
589 | goto out; | |
590 | ||
591 | } | |
592 | ||
d9ef5a8c | 593 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) |
1da177e4 LT |
594 | { |
595 | static struct proc_nfs_info { | |
596 | int flag; | |
597 | char *str; | |
598 | char *nostr; | |
599 | } nfs_info[] = { | |
600 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
601 | { NFS_MOUNT_INTR, ",intr", "" }, | |
1da177e4 LT |
602 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
603 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
c8bded96 | 604 | { NFS_MOUNT_NONLM, ",nolock", "" }, |
b7fa0554 | 605 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
1da177e4 LT |
606 | { 0, NULL, NULL } |
607 | }; | |
608 | struct proc_nfs_info *nfs_infop; | |
3063d8a1 TM |
609 | char buf[12]; |
610 | char *proto; | |
1da177e4 | 611 | |
c8bded96 | 612 | seq_printf(m, ",vers=%d", nfss->rpc_ops->version); |
1da177e4 LT |
613 | seq_printf(m, ",rsize=%d", nfss->rsize); |
614 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
d9ef5a8c | 615 | if (nfss->acregmin != 3*HZ || showdefaults) |
1da177e4 | 616 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); |
d9ef5a8c | 617 | if (nfss->acregmax != 60*HZ || showdefaults) |
1da177e4 | 618 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); |
d9ef5a8c | 619 | if (nfss->acdirmin != 30*HZ || showdefaults) |
1da177e4 | 620 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); |
d9ef5a8c | 621 | if (nfss->acdirmax != 60*HZ || showdefaults) |
1da177e4 LT |
622 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); |
623 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
624 | if (nfss->flags & nfs_infop->flag) | |
625 | seq_puts(m, nfs_infop->str); | |
626 | else | |
627 | seq_puts(m, nfs_infop->nostr); | |
628 | } | |
3063d8a1 TM |
629 | switch (nfss->client->cl_xprt->prot) { |
630 | case IPPROTO_TCP: | |
631 | proto = "tcp"; | |
632 | break; | |
633 | case IPPROTO_UDP: | |
634 | proto = "udp"; | |
635 | break; | |
636 | default: | |
637 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); | |
638 | proto = buf; | |
639 | } | |
640 | seq_printf(m, ",proto=%s", proto); | |
7a480e25 CL |
641 | seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); |
642 | seq_printf(m, ",retrans=%u", nfss->retrans_count); | |
d9ef5a8c CL |
643 | } |
644 | ||
645 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
646 | { | |
647 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
648 | ||
649 | nfs_show_mount_options(m, nfss, 0); | |
650 | ||
1da177e4 LT |
651 | seq_puts(m, ",addr="); |
652 | seq_escape(m, nfss->hostname, " \t\n\\"); | |
d9ef5a8c CL |
653 | |
654 | return 0; | |
655 | } | |
656 | ||
657 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
658 | { | |
659 | int i, cpu; | |
660 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
661 | struct rpc_auth *auth = nfss->client->cl_auth; | |
662 | struct nfs_iostats totals = { }; | |
663 | ||
664 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
665 | ||
666 | /* | |
667 | * Display all mount option settings | |
668 | */ | |
669 | seq_printf(m, "\n\topts:\t"); | |
670 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
671 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
672 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
673 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
674 | nfs_show_mount_options(m, nfss, 1); | |
675 | ||
67ec9f46 CL |
676 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); |
677 | ||
d9ef5a8c CL |
678 | seq_printf(m, "\n\tcaps:\t"); |
679 | seq_printf(m, "caps=0x%x", nfss->caps); | |
680 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
681 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
682 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
683 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
684 | ||
685 | #ifdef CONFIG_NFS_V4 | |
686 | if (nfss->rpc_ops->version == 4) { | |
687 | seq_printf(m, "\n\tnfsv4:\t"); | |
688 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
689 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
690 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
691 | } | |
692 | #endif | |
693 | ||
694 | /* | |
695 | * Display security flavor in effect for this mount | |
696 | */ | |
697 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
698 | if (auth->au_flavor) | |
699 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
700 | ||
701 | /* | |
702 | * Display superblock I/O counters | |
703 | */ | |
b9d9506d | 704 | for_each_possible_cpu(cpu) { |
d9ef5a8c CL |
705 | struct nfs_iostats *stats; |
706 | ||
d9ef5a8c CL |
707 | preempt_disable(); |
708 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
709 | ||
710 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
711 | totals.events[i] += stats->events[i]; | |
712 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
713 | totals.bytes[i] += stats->bytes[i]; | |
714 | ||
715 | preempt_enable(); | |
716 | } | |
717 | ||
718 | seq_printf(m, "\n\tevents:\t"); | |
719 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
720 | seq_printf(m, "%lu ", totals.events[i]); | |
721 | seq_printf(m, "\n\tbytes:\t"); | |
722 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
723 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
4ece3a2d CL |
724 | seq_printf(m, "\n"); |
725 | ||
726 | rpc_print_iostats(m, nfss->client); | |
d9ef5a8c | 727 | |
1da177e4 LT |
728 | return 0; |
729 | } | |
730 | ||
29884df0 TM |
731 | /** |
732 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
733 | */ | |
734 | int nfs_sync_mapping(struct address_space *mapping) | |
735 | { | |
736 | int ret; | |
737 | ||
738 | if (mapping->nrpages == 0) | |
739 | return 0; | |
740 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 741 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
742 | if (ret != 0) |
743 | goto out; | |
744 | ret = nfs_wb_all(mapping->host); | |
745 | out: | |
746 | return ret; | |
747 | } | |
748 | ||
1da177e4 LT |
749 | /* |
750 | * Invalidate the local caches | |
751 | */ | |
b37b03b7 | 752 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
753 | { |
754 | struct nfs_inode *nfsi = NFS_I(inode); | |
755 | int mode = inode->i_mode; | |
756 | ||
91d5b470 CL |
757 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
758 | ||
1da177e4 LT |
759 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
760 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; | |
761 | ||
762 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
763 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 764 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 765 | else |
55296809 | 766 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 767 | } |
dc59250c | 768 | |
b37b03b7 TM |
769 | void nfs_zap_caches(struct inode *inode) |
770 | { | |
771 | spin_lock(&inode->i_lock); | |
772 | nfs_zap_caches_locked(inode); | |
dc59250c | 773 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
774 | } |
775 | ||
776 | static void nfs_zap_acl_cache(struct inode *inode) | |
777 | { | |
778 | void (*clear_acl_cache)(struct inode *); | |
779 | ||
780 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
781 | if (clear_acl_cache != NULL) | |
782 | clear_acl_cache(inode); | |
dc59250c | 783 | spin_lock(&inode->i_lock); |
55296809 | 784 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 785 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
786 | } |
787 | ||
788 | /* | |
b37b03b7 TM |
789 | * Invalidate, but do not unhash, the inode. |
790 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 791 | */ |
b37b03b7 | 792 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 793 | { |
b37b03b7 TM |
794 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
795 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
796 | } |
797 | ||
798 | struct nfs_find_desc { | |
799 | struct nfs_fh *fh; | |
800 | struct nfs_fattr *fattr; | |
801 | }; | |
802 | ||
803 | /* | |
804 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
805 | * this, and re-exported directories (also seen in NFSv2) | |
806 | * we are forced to allow 2 different inodes to have the same | |
807 | * i_ino. | |
808 | */ | |
809 | static int | |
810 | nfs_find_actor(struct inode *inode, void *opaque) | |
811 | { | |
812 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
813 | struct nfs_fh *fh = desc->fh; | |
814 | struct nfs_fattr *fattr = desc->fattr; | |
815 | ||
816 | if (NFS_FILEID(inode) != fattr->fileid) | |
817 | return 0; | |
818 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
819 | return 0; | |
820 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
821 | return 0; | |
822 | return 1; | |
823 | } | |
824 | ||
825 | static int | |
826 | nfs_init_locked(struct inode *inode, void *opaque) | |
827 | { | |
828 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
829 | struct nfs_fattr *fattr = desc->fattr; | |
830 | ||
831 | NFS_FILEID(inode) = fattr->fileid; | |
832 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
833 | return 0; | |
834 | } | |
835 | ||
836 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
837 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
838 | ||
839 | /* | |
840 | * This is our front-end to iget that looks up inodes by file handle | |
841 | * instead of inode number. | |
842 | */ | |
843 | struct inode * | |
844 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
845 | { | |
846 | struct nfs_find_desc desc = { | |
847 | .fh = fh, | |
848 | .fattr = fattr | |
849 | }; | |
03f28e3a | 850 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
851 | unsigned long hash; |
852 | ||
853 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
854 | goto out_no_inode; | |
855 | ||
856 | if (!fattr->nlink) { | |
857 | printk("NFS: Buggy server - nlink == 0!\n"); | |
858 | goto out_no_inode; | |
859 | } | |
860 | ||
861 | hash = nfs_fattr_to_ino_t(fattr); | |
862 | ||
03f28e3a TM |
863 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
864 | if (inode == NULL) { | |
865 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 866 | goto out_no_inode; |
03f28e3a | 867 | } |
1da177e4 LT |
868 | |
869 | if (inode->i_state & I_NEW) { | |
870 | struct nfs_inode *nfsi = NFS_I(inode); | |
871 | ||
872 | /* We set i_ino for the few things that still rely on it, | |
873 | * such as stat(2) */ | |
874 | inode->i_ino = hash; | |
875 | ||
876 | /* We can't support update_atime(), since the server will reset it */ | |
877 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
878 | inode->i_mode = fattr->mode; | |
879 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
880 | * that's precisely what we have in nfs_file_inode_operations. | |
881 | */ | |
92cfc62c | 882 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
1da177e4 LT |
883 | if (S_ISREG(inode->i_mode)) { |
884 | inode->i_fop = &nfs_file_operations; | |
885 | inode->i_data.a_ops = &nfs_file_aops; | |
886 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
887 | } else if (S_ISDIR(inode->i_mode)) { | |
888 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; | |
889 | inode->i_fop = &nfs_dir_operations; | |
890 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
891 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 892 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
893 | } else if (S_ISLNK(inode->i_mode)) |
894 | inode->i_op = &nfs_symlink_inode_operations; | |
895 | else | |
896 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
897 | ||
33801147 TM |
898 | nfsi->read_cache_jiffies = fattr->time_start; |
899 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
900 | inode->i_atime = fattr->atime; |
901 | inode->i_mtime = fattr->mtime; | |
902 | inode->i_ctime = fattr->ctime; | |
903 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
904 | nfsi->change_attr = fattr->change_attr; | |
905 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
906 | inode->i_nlink = fattr->nlink; | |
907 | inode->i_uid = fattr->uid; | |
908 | inode->i_gid = fattr->gid; | |
909 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
910 | /* | |
911 | * report the blocks in 512byte units | |
912 | */ | |
913 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
914 | inode->i_blksize = inode->i_sb->s_blocksize; | |
915 | } else { | |
916 | inode->i_blocks = fattr->du.nfs2.blocks; | |
917 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
918 | } | |
919 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
920 | nfsi->attrtimeo_timestamp = jiffies; | |
921 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
922 | nfsi->cache_access.cred = NULL; | |
923 | ||
924 | unlock_new_inode(inode); | |
925 | } else | |
926 | nfs_refresh_inode(inode, fattr); | |
927 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
928 | inode->i_sb->s_id, | |
929 | (long long)NFS_FILEID(inode), | |
930 | atomic_read(&inode->i_count)); | |
931 | ||
932 | out: | |
933 | return inode; | |
934 | ||
935 | out_no_inode: | |
03f28e3a | 936 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
937 | goto out; |
938 | } | |
939 | ||
940 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
941 | ||
942 | int | |
943 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
944 | { | |
945 | struct inode *inode = dentry->d_inode; | |
946 | struct nfs_fattr fattr; | |
947 | int error; | |
948 | ||
91d5b470 CL |
949 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
950 | ||
1da177e4 LT |
951 | if (attr->ia_valid & ATTR_SIZE) { |
952 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
953 | attr->ia_valid &= ~ATTR_SIZE; | |
954 | } | |
955 | ||
956 | /* Optimization: if the end result is no change, don't RPC */ | |
957 | attr->ia_valid &= NFS_VALID_ATTRS; | |
958 | if (attr->ia_valid == 0) | |
959 | return 0; | |
960 | ||
961 | lock_kernel(); | |
962 | nfs_begin_data_update(inode); | |
755c1e20 TM |
963 | /* Write all dirty data */ |
964 | filemap_write_and_wait(inode->i_mapping); | |
965 | nfs_wb_all(inode); | |
642ac549 TM |
966 | /* |
967 | * Return any delegations if we're going to change ACLs | |
968 | */ | |
969 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
970 | nfs_inode_return_delegation(inode); | |
1da177e4 | 971 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 972 | if (error == 0) |
1da177e4 | 973 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
974 | nfs_end_data_update(inode); |
975 | unlock_kernel(); | |
976 | return error; | |
977 | } | |
978 | ||
979 | /** | |
980 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
981 | * @inode: pointer to struct inode | |
982 | * @attr: pointer to struct iattr | |
983 | * | |
984 | * Note: we do this in the *proc.c in order to ensure that | |
985 | * it works for things like exclusive creates too. | |
986 | */ | |
987 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
988 | { | |
989 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 990 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
991 | int mode = attr->ia_mode & S_IALLUGO; |
992 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
993 | inode->i_mode = mode; |
994 | } | |
995 | if ((attr->ia_valid & ATTR_UID) != 0) | |
996 | inode->i_uid = attr->ia_uid; | |
997 | if ((attr->ia_valid & ATTR_GID) != 0) | |
998 | inode->i_gid = attr->ia_gid; | |
dc59250c | 999 | spin_lock(&inode->i_lock); |
55296809 | 1000 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 1001 | spin_unlock(&inode->i_lock); |
65e4308d TM |
1002 | } |
1003 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 1004 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
65e4308d TM |
1005 | inode->i_size = attr->ia_size; |
1006 | vmtruncate(inode, attr->ia_size); | |
1007 | } | |
1da177e4 LT |
1008 | } |
1009 | ||
412d582e CL |
1010 | static int nfs_wait_schedule(void *word) |
1011 | { | |
1012 | if (signal_pending(current)) | |
1013 | return -ERESTARTSYS; | |
1014 | schedule(); | |
1015 | return 0; | |
1016 | } | |
1017 | ||
1da177e4 LT |
1018 | /* |
1019 | * Wait for the inode to get unlocked. | |
1da177e4 | 1020 | */ |
412d582e | 1021 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
1022 | { |
1023 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
1024 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 1025 | sigset_t oldmask; |
1da177e4 | 1026 | int error; |
412d582e | 1027 | |
412d582e CL |
1028 | rpc_clnt_sigmask(clnt, &oldmask); |
1029 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
1030 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
1031 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 1032 | |
1da177e4 LT |
1033 | return error; |
1034 | } | |
1035 | ||
412d582e CL |
1036 | static void nfs_wake_up_inode(struct inode *inode) |
1037 | { | |
1038 | struct nfs_inode *nfsi = NFS_I(inode); | |
1039 | ||
1040 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
1041 | smp_mb__after_clear_bit(); | |
1042 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
1043 | } | |
1044 | ||
1da177e4 LT |
1045 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
1046 | { | |
1047 | struct inode *inode = dentry->d_inode; | |
55296809 | 1048 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
1049 | int err; |
1050 | ||
70b9ecbd | 1051 | /* Flush out writes to the server in order to update c/mtime */ |
c42de9dd | 1052 | nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); |
fc33a7bb CH |
1053 | |
1054 | /* | |
1055 | * We may force a getattr if the user cares about atime. | |
1056 | * | |
1057 | * Note that we only have to check the vfsmount flags here: | |
1058 | * - NFS always sets S_NOATIME by so checking it would give a | |
1059 | * bogus result | |
1060 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
1061 | * no point in checking those. | |
1062 | */ | |
1063 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
1064 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 1065 | need_atime = 0; |
fc33a7bb | 1066 | |
1da177e4 LT |
1067 | if (need_atime) |
1068 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
1069 | else | |
1070 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
1071 | if (!err) | |
1072 | generic_fillattr(inode, stat); | |
1073 | return err; | |
1074 | } | |
1075 | ||
b92dccf6 | 1076 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
1077 | { |
1078 | struct nfs_open_context *ctx; | |
1079 | ||
1080 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); | |
1081 | if (ctx != NULL) { | |
1082 | atomic_set(&ctx->count, 1); | |
1083 | ctx->dentry = dget(dentry); | |
b92dccf6 | 1084 | ctx->vfsmnt = mntget(mnt); |
1da177e4 LT |
1085 | ctx->cred = get_rpccred(cred); |
1086 | ctx->state = NULL; | |
1087 | ctx->lockowner = current->files; | |
1088 | ctx->error = 0; | |
00a92642 | 1089 | ctx->dir_cookie = 0; |
1da177e4 LT |
1090 | } |
1091 | return ctx; | |
1092 | } | |
1093 | ||
1094 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
1095 | { | |
1096 | if (ctx != NULL) | |
1097 | atomic_inc(&ctx->count); | |
1098 | return ctx; | |
1099 | } | |
1100 | ||
1101 | void put_nfs_open_context(struct nfs_open_context *ctx) | |
1102 | { | |
1103 | if (atomic_dec_and_test(&ctx->count)) { | |
1104 | if (!list_empty(&ctx->list)) { | |
1105 | struct inode *inode = ctx->dentry->d_inode; | |
1106 | spin_lock(&inode->i_lock); | |
1107 | list_del(&ctx->list); | |
1108 | spin_unlock(&inode->i_lock); | |
1109 | } | |
1110 | if (ctx->state != NULL) | |
1111 | nfs4_close_state(ctx->state, ctx->mode); | |
1112 | if (ctx->cred != NULL) | |
1113 | put_rpccred(ctx->cred); | |
1114 | dput(ctx->dentry); | |
b92dccf6 | 1115 | mntput(ctx->vfsmnt); |
1da177e4 LT |
1116 | kfree(ctx); |
1117 | } | |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1122 | * shared pages | |
1123 | */ | |
b92dccf6 | 1124 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 LT |
1125 | { |
1126 | struct inode *inode = filp->f_dentry->d_inode; | |
1127 | struct nfs_inode *nfsi = NFS_I(inode); | |
1128 | ||
1129 | filp->private_data = get_nfs_open_context(ctx); | |
1130 | spin_lock(&inode->i_lock); | |
1131 | list_add(&ctx->list, &nfsi->open_files); | |
1132 | spin_unlock(&inode->i_lock); | |
1133 | } | |
1134 | ||
d530838b TM |
1135 | /* |
1136 | * Given an inode, search for an open context with the desired characteristics | |
1137 | */ | |
1138 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
1139 | { |
1140 | struct nfs_inode *nfsi = NFS_I(inode); | |
1141 | struct nfs_open_context *pos, *ctx = NULL; | |
1142 | ||
1143 | spin_lock(&inode->i_lock); | |
1144 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
1145 | if (cred != NULL && pos->cred != cred) |
1146 | continue; | |
1da177e4 LT |
1147 | if ((pos->mode & mode) == mode) { |
1148 | ctx = get_nfs_open_context(pos); | |
1149 | break; | |
1150 | } | |
1151 | } | |
1152 | spin_unlock(&inode->i_lock); | |
1153 | return ctx; | |
1154 | } | |
1155 | ||
b92dccf6 | 1156 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 LT |
1157 | { |
1158 | struct inode *inode = filp->f_dentry->d_inode; | |
1159 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; | |
1160 | ||
1161 | if (ctx) { | |
1162 | filp->private_data = NULL; | |
1163 | spin_lock(&inode->i_lock); | |
1164 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
1165 | spin_unlock(&inode->i_lock); | |
1166 | put_nfs_open_context(ctx); | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * These allocate and release file read/write context information. | |
1172 | */ | |
1173 | int nfs_open(struct inode *inode, struct file *filp) | |
1174 | { | |
1175 | struct nfs_open_context *ctx; | |
1176 | struct rpc_cred *cred; | |
1177 | ||
1178 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
1179 | if (IS_ERR(cred)) | |
1180 | return PTR_ERR(cred); | |
b92dccf6 | 1181 | ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); |
1da177e4 LT |
1182 | put_rpccred(cred); |
1183 | if (ctx == NULL) | |
1184 | return -ENOMEM; | |
1185 | ctx->mode = filp->f_mode; | |
1186 | nfs_file_set_open_context(filp, ctx); | |
1187 | put_nfs_open_context(ctx); | |
1da177e4 LT |
1188 | return 0; |
1189 | } | |
1190 | ||
1191 | int nfs_release(struct inode *inode, struct file *filp) | |
1192 | { | |
1da177e4 LT |
1193 | nfs_file_clear_open_context(filp); |
1194 | return 0; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * This function is called whenever some part of NFS notices that | |
1199 | * the cached attributes have to be refreshed. | |
1200 | */ | |
1201 | int | |
1202 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1203 | { | |
1204 | int status = -ESTALE; | |
1205 | struct nfs_fattr fattr; | |
1206 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
1207 | |
1208 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
1209 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
1210 | ||
1211 | lock_kernel(); | |
1212 | if (!inode || is_bad_inode(inode)) | |
1213 | goto out_nowait; | |
1214 | if (NFS_STALE(inode)) | |
1215 | goto out_nowait; | |
1216 | ||
412d582e CL |
1217 | status = nfs_wait_on_inode(inode); |
1218 | if (status < 0) | |
1219 | goto out; | |
1220 | if (NFS_STALE(inode)) { | |
1221 | status = -ESTALE; | |
1222 | /* Do we trust the cached ESTALE? */ | |
1223 | if (NFS_ATTRTIMEO(inode) != 0) { | |
1224 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) { | |
1225 | /* no */ | |
1226 | } else | |
1227 | goto out; | |
1228 | } | |
1da177e4 | 1229 | } |
1da177e4 | 1230 | |
1da177e4 LT |
1231 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
1232 | if (status != 0) { | |
1233 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
1234 | inode->i_sb->s_id, | |
1235 | (long long)NFS_FILEID(inode), status); | |
1236 | if (status == -ESTALE) { | |
1237 | nfs_zap_caches(inode); | |
1238 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 1239 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
1240 | } |
1241 | goto out; | |
1242 | } | |
1243 | ||
33801147 | 1244 | spin_lock(&inode->i_lock); |
24aa1fe6 | 1245 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 1246 | if (status) { |
33801147 | 1247 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
1248 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
1249 | inode->i_sb->s_id, | |
1250 | (long long)NFS_FILEID(inode), status); | |
1251 | goto out; | |
1252 | } | |
dc59250c | 1253 | spin_unlock(&inode->i_lock); |
55296809 | 1254 | |
7d52e862 | 1255 | nfs_revalidate_mapping(inode, inode->i_mapping); |
55296809 | 1256 | |
24aa1fe6 | 1257 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1258 | nfs_zap_acl_cache(inode); |
55296809 | 1259 | |
1da177e4 LT |
1260 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
1261 | inode->i_sb->s_id, | |
1262 | (long long)NFS_FILEID(inode)); | |
1263 | ||
412d582e CL |
1264 | out: |
1265 | nfs_wake_up_inode(inode); | |
1266 | ||
1da177e4 LT |
1267 | out_nowait: |
1268 | unlock_kernel(); | |
1269 | return status; | |
1270 | } | |
1271 | ||
1272 | int nfs_attribute_timeout(struct inode *inode) | |
1273 | { | |
1274 | struct nfs_inode *nfsi = NFS_I(inode); | |
1275 | ||
1276 | if (nfs_have_delegation(inode, FMODE_READ)) | |
1277 | return 0; | |
1278 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); | |
1279 | } | |
1280 | ||
1281 | /** | |
1282 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1283 | * @server - pointer to nfs_server struct | |
1284 | * @inode - pointer to inode struct | |
1285 | * | |
1286 | * Updates inode attribute information by retrieving the data from the server. | |
1287 | */ | |
1288 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1289 | { | |
91d5b470 | 1290 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
55296809 | 1291 | if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) |
1da177e4 LT |
1292 | && !nfs_attribute_timeout(inode)) |
1293 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1294 | return __nfs_revalidate_inode(server, inode); | |
1295 | } | |
1296 | ||
7d52e862 TM |
1297 | /** |
1298 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1299 | * @inode - pointer to host inode | |
1300 | * @mapping - pointer to mapping | |
1301 | */ | |
1302 | void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1303 | { | |
1304 | struct nfs_inode *nfsi = NFS_I(inode); | |
1305 | ||
55296809 | 1306 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
91d5b470 | 1307 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
29884df0 TM |
1308 | if (S_ISREG(inode->i_mode)) |
1309 | nfs_sync_mapping(mapping); | |
7d52e862 | 1310 | invalidate_inode_pages2(mapping); |
dc59250c CL |
1311 | |
1312 | spin_lock(&inode->i_lock); | |
55296809 | 1313 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
7d52e862 TM |
1314 | if (S_ISDIR(inode->i_mode)) { |
1315 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
1316 | /* This ensures we revalidate child dentries */ | |
913a70fc | 1317 | nfsi->cache_change_attribute = jiffies; |
7d52e862 | 1318 | } |
dc59250c CL |
1319 | spin_unlock(&inode->i_lock); |
1320 | ||
7d52e862 TM |
1321 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
1322 | inode->i_sb->s_id, | |
1323 | (long long)NFS_FILEID(inode)); | |
1324 | } | |
1325 | } | |
1326 | ||
1da177e4 LT |
1327 | /** |
1328 | * nfs_begin_data_update | |
1329 | * @inode - pointer to inode | |
1330 | * Declare that a set of operations will update file data on the server | |
1331 | */ | |
1332 | void nfs_begin_data_update(struct inode *inode) | |
1333 | { | |
1334 | atomic_inc(&NFS_I(inode)->data_updates); | |
1335 | } | |
1336 | ||
1337 | /** | |
1338 | * nfs_end_data_update | |
1339 | * @inode - pointer to inode | |
1340 | * Declare end of the operations that will update file data | |
1341 | * This will mark the inode as immediately needing revalidation | |
1342 | * of its attribute cache. | |
1343 | */ | |
1344 | void nfs_end_data_update(struct inode *inode) | |
1345 | { | |
1346 | struct nfs_inode *nfsi = NFS_I(inode); | |
1347 | ||
1348 | if (!nfs_have_delegation(inode, FMODE_READ)) { | |
decf491f TM |
1349 | /* Directories and symlinks: invalidate page cache */ |
1350 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
1351 | spin_lock(&inode->i_lock); | |
55296809 | 1352 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
1353 | spin_unlock(&inode->i_lock); |
1354 | } | |
1da177e4 | 1355 | } |
913a70fc | 1356 | nfsi->cache_change_attribute = jiffies; |
1da177e4 LT |
1357 | atomic_dec(&nfsi->data_updates); |
1358 | } | |
1359 | ||
a895b4a1 TM |
1360 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1361 | { | |
1362 | struct nfs_inode *nfsi = NFS_I(inode); | |
1363 | ||
1364 | if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0 | |
1365 | && nfsi->change_attr == fattr->pre_change_attr) { | |
1366 | nfsi->change_attr = fattr->change_attr; | |
1367 | nfsi->cache_change_attribute = jiffies; | |
1368 | } | |
1369 | ||
1370 | /* If we have atomic WCC data, we may update some attributes */ | |
1371 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
1372 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { | |
1373 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1374 | nfsi->cache_change_attribute = jiffies; | |
1375 | } | |
1376 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
1377 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
1378 | nfsi->cache_change_attribute = jiffies; | |
1379 | } | |
1380 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) { | |
1381 | inode->i_size = fattr->size; | |
1382 | nfsi->cache_change_attribute = jiffies; | |
1383 | } | |
1384 | } | |
1385 | } | |
1386 | ||
1da177e4 | 1387 | /** |
33801147 | 1388 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1389 | * @inode - pointer to inode |
1390 | * @fattr - updated attributes | |
1391 | * | |
1392 | * Verifies the attribute cache. If we have just changed the attributes, | |
1393 | * so that fattr carries weak cache consistency data, then it may | |
1394 | * also update the ctime/mtime/change_attribute. | |
1395 | */ | |
33801147 | 1396 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1397 | { |
1398 | struct nfs_inode *nfsi = NFS_I(inode); | |
1399 | loff_t cur_size, new_isize; | |
1400 | int data_unstable; | |
1401 | ||
dc59250c | 1402 | |
a895b4a1 TM |
1403 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1404 | return 0; | |
1405 | ||
ca62b9c3 TM |
1406 | /* Has the inode gone and changed behind our back? */ |
1407 | if (nfsi->fileid != fattr->fileid | |
1408 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
1409 | return -EIO; | |
1410 | } | |
1411 | ||
1da177e4 LT |
1412 | /* Are we in the process of updating data on the server? */ |
1413 | data_unstable = nfs_caches_unstable(inode); | |
1414 | ||
a895b4a1 TM |
1415 | /* Do atomic weak cache consistency updates */ |
1416 | nfs_wcc_update_inode(inode, fattr); | |
1da177e4 | 1417 | |
ca62b9c3 TM |
1418 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0) { |
1419 | if (nfsi->change_attr == fattr->change_attr) | |
1420 | goto out; | |
a895b4a1 TM |
1421 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1422 | if (!data_unstable) | |
1423 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; | |
dc59250c | 1424 | } |
1da177e4 | 1425 | |
1da177e4 | 1426 | /* Verify a few of the more important attributes */ |
fe51beec | 1427 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
55296809 | 1428 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
fe51beec | 1429 | if (!data_unstable) |
55296809 | 1430 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; |
fe51beec | 1431 | } |
ca62b9c3 TM |
1432 | |
1433 | cur_size = i_size_read(inode); | |
1434 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 TM |
1435 | if (cur_size != new_isize && nfsi->npages == 0) |
1436 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
1437 | |
1438 | /* Have any file permissions changed? */ | |
1439 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
1440 | || inode->i_uid != fattr->uid | |
1441 | || inode->i_gid != fattr->gid) | |
55296809 | 1442 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1443 | |
1444 | /* Has the link count changed? */ | |
1445 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 1446 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1447 | |
ca62b9c3 | 1448 | out: |
1da177e4 | 1449 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) |
55296809 | 1450 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 1451 | |
33801147 | 1452 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1453 | return 0; |
1454 | } | |
1455 | ||
33801147 TM |
1456 | /** |
1457 | * nfs_refresh_inode - try to update the inode attribute cache | |
1458 | * @inode - pointer to inode | |
1459 | * @fattr - updated attributes | |
1460 | * | |
1461 | * Check that an RPC call that returned attributes has not overlapped with | |
1462 | * other recent updates of the inode metadata, then decide whether it is | |
1463 | * safe to do a full update of the inode attributes, or whether just to | |
1464 | * call nfs_check_inode_attributes. | |
1465 | */ | |
1466 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1467 | { | |
1468 | struct nfs_inode *nfsi = NFS_I(inode); | |
1469 | int status; | |
1470 | ||
1471 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1472 | return 0; | |
1473 | spin_lock(&inode->i_lock); | |
1474 | nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; | |
33801147 | 1475 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 1476 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
1477 | else |
1478 | status = nfs_check_inode_attributes(inode, fattr); | |
1479 | ||
1480 | spin_unlock(&inode->i_lock); | |
1481 | return status; | |
1482 | } | |
1483 | ||
decf491f TM |
1484 | /** |
1485 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1486 | * @inode - pointer to inode | |
1487 | * @fattr - updated attributes | |
1488 | * | |
1489 | * After an operation that has changed the inode metadata, mark the | |
1490 | * attribute cache as being invalid, then try to update it. | |
1491 | */ | |
1492 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1493 | { | |
1494 | struct nfs_inode *nfsi = NFS_I(inode); | |
1495 | int status = 0; | |
1496 | ||
1497 | spin_lock(&inode->i_lock); | |
1498 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { | |
1499 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; | |
1500 | goto out; | |
1501 | } | |
24aa1fe6 | 1502 | status = nfs_update_inode(inode, fattr); |
decf491f TM |
1503 | out: |
1504 | spin_unlock(&inode->i_lock); | |
1505 | return status; | |
1506 | } | |
1507 | ||
1da177e4 LT |
1508 | /* |
1509 | * Many nfs protocol calls return the new file attributes after | |
1510 | * an operation. Here we update the inode to reflect the state | |
1511 | * of the server's inode. | |
1512 | * | |
1513 | * This is a bit tricky because we have to make sure all dirty pages | |
1514 | * have been sent off to the server before calling invalidate_inode_pages. | |
1515 | * To make sure no other process adds more write requests while we try | |
1516 | * our best to flush them, we make them sleep during the attribute refresh. | |
1517 | * | |
1518 | * A very similar scenario holds for the dir cache. | |
1519 | */ | |
24aa1fe6 | 1520 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1521 | { |
1522 | struct nfs_inode *nfsi = NFS_I(inode); | |
951a143b | 1523 | loff_t cur_isize, new_isize; |
1da177e4 | 1524 | unsigned int invalid = 0; |
24aa1fe6 | 1525 | int data_stable; |
1da177e4 LT |
1526 | |
1527 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
1528 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
1529 | atomic_read(&inode->i_count), fattr->valid); | |
1530 | ||
1531 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1532 | return 0; | |
1533 | ||
325cfed9 CL |
1534 | if (nfsi->fileid != fattr->fileid) |
1535 | goto out_fileid; | |
1da177e4 LT |
1536 | |
1537 | /* | |
1538 | * Make sure the inode's type hasn't changed. | |
1539 | */ | |
33801147 | 1540 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1541 | goto out_changed; |
1542 | ||
1543 | /* | |
1544 | * Update the read time so we don't revalidate too often. | |
1545 | */ | |
33801147 TM |
1546 | nfsi->read_cache_jiffies = fattr->time_start; |
1547 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
1548 | |
1549 | /* Are we racing with known updates of the metadata on the server? */ | |
24aa1fe6 TM |
1550 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
1551 | if (data_stable) | |
1552 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); | |
1da177e4 | 1553 | |
a895b4a1 TM |
1554 | /* Do atomic weak cache consistency updates */ |
1555 | nfs_wcc_update_inode(inode, fattr); | |
1556 | ||
951a143b | 1557 | /* Check if our cached file size is stale */ |
1da177e4 LT |
1558 | new_isize = nfs_size_to_loff_t(fattr->size); |
1559 | cur_isize = i_size_read(inode); | |
951a143b TM |
1560 | if (new_isize != cur_isize) { |
1561 | /* Do we perhaps have any outstanding writes? */ | |
1562 | if (nfsi->npages == 0) { | |
1563 | /* No, but did we race with nfs_end_data_update()? */ | |
24aa1fe6 | 1564 | if (data_stable) { |
1da177e4 | 1565 | inode->i_size = new_isize; |
951a143b | 1566 | invalid |= NFS_INO_INVALID_DATA; |
1da177e4 | 1567 | } |
951a143b TM |
1568 | invalid |= NFS_INO_INVALID_ATTR; |
1569 | } else if (new_isize > cur_isize) { | |
1da177e4 LT |
1570 | inode->i_size = new_isize; |
1571 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1572 | } | |
24aa1fe6 | 1573 | nfsi->cache_change_attribute = jiffies; |
951a143b TM |
1574 | dprintk("NFS: isize change on server for file %s/%ld\n", |
1575 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1576 | } |
1577 | ||
951a143b | 1578 | /* Check if the mtime agrees */ |
1da177e4 LT |
1579 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
1580 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
951a143b TM |
1581 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
1582 | inode->i_sb->s_id, inode->i_ino); | |
24aa1fe6 TM |
1583 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
1584 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
1585 | } |
1586 | ||
ada70d94 TM |
1587 | /* If ctime has changed we should definitely clear access+acl caches */ |
1588 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { | |
24aa1fe6 | 1589 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
ada70d94 | 1590 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
24aa1fe6 | 1591 | nfsi->cache_change_attribute = jiffies; |
ada70d94 | 1592 | } |
1da177e4 LT |
1593 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
1594 | ||
1595 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
1596 | inode->i_uid != fattr->uid || | |
1597 | inode->i_gid != fattr->gid) | |
ada70d94 | 1598 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
1599 | |
1600 | inode->i_mode = fattr->mode; | |
1601 | inode->i_nlink = fattr->nlink; | |
1602 | inode->i_uid = fattr->uid; | |
1603 | inode->i_gid = fattr->gid; | |
1604 | ||
1605 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
1606 | /* | |
1607 | * report the blocks in 512byte units | |
1608 | */ | |
1609 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1610 | inode->i_blksize = inode->i_sb->s_blocksize; | |
1611 | } else { | |
1612 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1613 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
1614 | } | |
1615 | ||
ca62b9c3 TM |
1616 | if ((fattr->valid & NFS_ATTR_FATTR_V4)) { |
1617 | if (nfsi->change_attr != fattr->change_attr) { | |
1618 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1619 | inode->i_sb->s_id, inode->i_ino); | |
1620 | nfsi->change_attr = fattr->change_attr; | |
1621 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1622 | nfsi->cache_change_attribute = jiffies; | |
1623 | } else | |
1624 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA); | |
1625 | } | |
1626 | ||
1da177e4 LT |
1627 | /* Update attrtimeo value if we're out of the unstable period */ |
1628 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1629 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 LT |
1630 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
1631 | nfsi->attrtimeo_timestamp = jiffies; | |
1632 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { | |
1633 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
1634 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1635 | nfsi->attrtimeo_timestamp = jiffies; | |
1636 | } | |
1637 | /* Don't invalidate the data if we were to blame */ | |
1638 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1639 | || S_ISLNK(inode->i_mode))) | |
1640 | invalid &= ~NFS_INO_INVALID_DATA; | |
24aa1fe6 TM |
1641 | if (data_stable) |
1642 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1643 | if (!nfs_have_delegation(inode, FMODE_READ)) |
55296809 | 1644 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1645 | |
1646 | return 0; | |
1647 | out_changed: | |
1648 | /* | |
1649 | * Big trouble! The inode has become a different object. | |
1650 | */ | |
1651 | #ifdef NFS_PARANOIA | |
1652 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", | |
1653 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
1654 | #endif | |
b37b03b7 | 1655 | out_err: |
1da177e4 LT |
1656 | /* |
1657 | * No need to worry about unhashing the dentry, as the | |
1658 | * lookup validation will know that the inode is bad. | |
1659 | * (But we fall through to invalidate the caches.) | |
1660 | */ | |
1661 | nfs_invalidate_inode(inode); | |
1da177e4 | 1662 | return -ESTALE; |
325cfed9 CL |
1663 | |
1664 | out_fileid: | |
1665 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1666 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1667 | NFS_SERVER(inode)->hostname, inode->i_sb->s_id, | |
1668 | (long long)nfsi->fileid, (long long)fattr->fileid); | |
1669 | goto out_err; | |
1da177e4 LT |
1670 | } |
1671 | ||
1672 | /* | |
1673 | * File system information | |
1674 | */ | |
1675 | ||
1676 | static int nfs_set_super(struct super_block *s, void *data) | |
1677 | { | |
1678 | s->s_fs_info = data; | |
1679 | return set_anon_super(s, data); | |
1680 | } | |
1681 | ||
1682 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1683 | { | |
1684 | struct nfs_server *server = data; | |
1685 | struct nfs_server *old = NFS_SB(sb); | |
1686 | ||
1687 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) | |
1688 | return 0; | |
1689 | if (old->addr.sin_port != server->addr.sin_port) | |
1690 | return 0; | |
1691 | return !nfs_compare_fh(&old->fh, &server->fh); | |
1692 | } | |
1693 | ||
454e2398 DH |
1694 | static int nfs_get_sb(struct file_system_type *fs_type, |
1695 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
1da177e4 LT |
1696 | { |
1697 | int error; | |
9085bbcb | 1698 | struct nfs_server *server = NULL; |
1da177e4 LT |
1699 | struct super_block *s; |
1700 | struct nfs_fh *root; | |
1701 | struct nfs_mount_data *data = raw_data; | |
1702 | ||
454e2398 | 1703 | error = -EINVAL; |
9085bbcb TM |
1704 | if (data == NULL) { |
1705 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
454e2398 | 1706 | goto out_err_noserver; |
9085bbcb TM |
1707 | } |
1708 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { | |
1709 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
454e2398 | 1710 | goto out_err_noserver; |
1da177e4 | 1711 | } |
9085bbcb TM |
1712 | switch (data->version) { |
1713 | case 1: | |
1714 | data->namlen = 0; | |
1715 | case 2: | |
1716 | data->bsize = 0; | |
1717 | case 3: | |
1718 | if (data->flags & NFS_MOUNT_VER3) { | |
1719 | dprintk("%s: mount structure version %d does not support NFSv3\n", | |
1720 | __FUNCTION__, | |
1721 | data->version); | |
454e2398 | 1722 | goto out_err_noserver; |
9085bbcb TM |
1723 | } |
1724 | data->root.size = NFS2_FHSIZE; | |
1725 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1726 | case 4: | |
1727 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { | |
1728 | dprintk("%s: mount structure version %d does not support strong security\n", | |
1729 | __FUNCTION__, | |
1730 | data->version); | |
454e2398 | 1731 | goto out_err_noserver; |
9085bbcb TM |
1732 | } |
1733 | case 5: | |
1734 | memset(data->context, 0, sizeof(data->context)); | |
1735 | } | |
1736 | #ifndef CONFIG_NFS_V3 | |
1737 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ | |
454e2398 | 1738 | error = -EPROTONOSUPPORT; |
9085bbcb TM |
1739 | if (data->flags & NFS_MOUNT_VER3) { |
1740 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); | |
454e2398 | 1741 | goto out_err_noserver; |
9085bbcb TM |
1742 | } |
1743 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 | 1744 | |
454e2398 | 1745 | error = -ENOMEM; |
bd647545 | 1746 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
1da177e4 | 1747 | if (!server) |
454e2398 | 1748 | goto out_err_noserver; |
1da177e4 LT |
1749 | /* Zero out the NFS state stuff */ |
1750 | init_nfsv4_state(server); | |
b7fa0554 | 1751 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 1752 | |
1da177e4 LT |
1753 | root = &server->fh; |
1754 | if (data->flags & NFS_MOUNT_VER3) | |
1755 | root->size = data->root.size; | |
1756 | else | |
1757 | root->size = NFS2_FHSIZE; | |
454e2398 | 1758 | error = -EINVAL; |
1da177e4 | 1759 | if (root->size > sizeof(root->data)) { |
9085bbcb TM |
1760 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
1761 | goto out_err; | |
1da177e4 LT |
1762 | } |
1763 | memcpy(root->data, data->root.data, root->size); | |
1764 | ||
1765 | /* We now require that the mount process passes the remote address */ | |
1766 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); | |
1767 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
1768 | dprintk("%s: mount program didn't pass remote address!\n", |
1769 | __FUNCTION__); | |
1770 | goto out_err; | |
1da177e4 LT |
1771 | } |
1772 | ||
9085bbcb | 1773 | /* Fire up rpciod if not yet running */ |
454e2398 DH |
1774 | error = rpciod_up(); |
1775 | if (error < 0) { | |
1776 | dprintk("%s: couldn't start rpciod! Error = %d\n", | |
1777 | __FUNCTION__, error); | |
9085bbcb | 1778 | goto out_err; |
1da177e4 LT |
1779 | } |
1780 | ||
9085bbcb | 1781 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
454e2398 DH |
1782 | if (IS_ERR(s)) { |
1783 | error = PTR_ERR(s); | |
1784 | goto out_err_rpciod; | |
1785 | } | |
1786 | ||
1787 | if (s->s_root) | |
9085bbcb | 1788 | goto out_rpciod_down; |
1da177e4 | 1789 | |
9085bbcb | 1790 | s->s_flags = flags; |
1da177e4 | 1791 | |
9b04c997 | 1792 | error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
1793 | if (error) { |
1794 | up_write(&s->s_umount); | |
1795 | deactivate_super(s); | |
454e2398 | 1796 | return error; |
1da177e4 LT |
1797 | } |
1798 | s->s_flags |= MS_ACTIVE; | |
454e2398 DH |
1799 | return simple_set_mnt(mnt, s); |
1800 | ||
9085bbcb TM |
1801 | out_rpciod_down: |
1802 | rpciod_down(); | |
454e2398 DH |
1803 | kfree(server); |
1804 | return simple_set_mnt(mnt, s); | |
1805 | ||
1806 | out_err_rpciod: | |
1807 | rpciod_down(); | |
9085bbcb TM |
1808 | out_err: |
1809 | kfree(server); | |
454e2398 DH |
1810 | out_err_noserver: |
1811 | return error; | |
1da177e4 LT |
1812 | } |
1813 | ||
1814 | static void nfs_kill_super(struct super_block *s) | |
1815 | { | |
1816 | struct nfs_server *server = NFS_SB(s); | |
1817 | ||
1818 | kill_anon_super(s); | |
1819 | ||
6a19275a | 1820 | if (!IS_ERR(server->client)) |
1da177e4 | 1821 | rpc_shutdown_client(server->client); |
6a19275a | 1822 | if (!IS_ERR(server->client_sys)) |
1da177e4 | 1823 | rpc_shutdown_client(server->client_sys); |
b7fa0554 AG |
1824 | if (!IS_ERR(server->client_acl)) |
1825 | rpc_shutdown_client(server->client_acl); | |
1da177e4 LT |
1826 | |
1827 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
1828 | lockd_down(); /* release rpc.lockd */ | |
1829 | ||
1830 | rpciod_down(); /* release rpciod */ | |
1831 | ||
01d0ae8b | 1832 | nfs_free_iostats(server->io_stats); |
f99d49ad | 1833 | kfree(server->hostname); |
1da177e4 LT |
1834 | kfree(server); |
1835 | } | |
1836 | ||
1837 | static struct file_system_type nfs_fs_type = { | |
1838 | .owner = THIS_MODULE, | |
1839 | .name = "nfs", | |
1840 | .get_sb = nfs_get_sb, | |
1841 | .kill_sb = nfs_kill_super, | |
1842 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
1843 | }; | |
1844 | ||
1845 | #ifdef CONFIG_NFS_V4 | |
1846 | ||
1847 | static void nfs4_clear_inode(struct inode *); | |
1848 | ||
1849 | ||
1850 | static struct super_operations nfs4_sops = { | |
1851 | .alloc_inode = nfs_alloc_inode, | |
1852 | .destroy_inode = nfs_destroy_inode, | |
1853 | .write_inode = nfs_write_inode, | |
1854 | .delete_inode = nfs_delete_inode, | |
1855 | .statfs = nfs_statfs, | |
1856 | .clear_inode = nfs4_clear_inode, | |
1857 | .umount_begin = nfs_umount_begin, | |
1858 | .show_options = nfs_show_options, | |
d9ef5a8c | 1859 | .show_stats = nfs_show_stats, |
1da177e4 LT |
1860 | }; |
1861 | ||
1862 | /* | |
1863 | * Clean out any remaining NFSv4 state that might be left over due | |
1864 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1865 | * nfs_open(). | |
1866 | */ | |
1867 | static void nfs4_clear_inode(struct inode *inode) | |
1868 | { | |
1869 | struct nfs_inode *nfsi = NFS_I(inode); | |
1870 | ||
1871 | /* If we are holding a delegation, return it! */ | |
cae7a073 | 1872 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
1873 | /* First call standard NFS clear_inode() code */ |
1874 | nfs_clear_inode(inode); | |
1875 | /* Now clear out any remaining state */ | |
1876 | while (!list_empty(&nfsi->open_states)) { | |
1877 | struct nfs4_state *state; | |
1878 | ||
1879 | state = list_entry(nfsi->open_states.next, | |
1880 | struct nfs4_state, | |
1881 | inode_states); | |
1882 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", | |
1883 | __FUNCTION__, | |
1884 | inode->i_sb->s_id, | |
1885 | (long long)NFS_FILEID(inode), | |
1886 | state); | |
1887 | BUG_ON(atomic_read(&state->count) != 1); | |
1888 | nfs4_close_state(state, state->state); | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | ||
1893 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) | |
1894 | { | |
1895 | struct nfs_server *server; | |
1896 | struct nfs4_client *clp = NULL; | |
1897 | struct rpc_xprt *xprt = NULL; | |
1898 | struct rpc_clnt *clnt = NULL; | |
1899 | struct rpc_timeout timeparms; | |
1900 | rpc_authflavor_t authflavour; | |
eab5c084 | 1901 | int err = -EIO; |
1da177e4 LT |
1902 | |
1903 | sb->s_blocksize_bits = 0; | |
1904 | sb->s_blocksize = 0; | |
1905 | server = NFS_SB(sb); | |
1906 | if (data->rsize != 0) | |
1907 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1908 | if (data->wsize != 0) | |
1909 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1910 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
1911 | server->caps = NFS_CAP_ATOMIC_OPEN; | |
1912 | ||
1913 | server->acregmin = data->acregmin*HZ; | |
1914 | server->acregmax = data->acregmax*HZ; | |
1915 | server->acdirmin = data->acdirmin*HZ; | |
1916 | server->acdirmax = data->acdirmax*HZ; | |
1917 | ||
1918 | server->rpc_ops = &nfs_v4_clientops; | |
1da177e4 | 1919 | |
eab5c084 | 1920 | nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); |
1da177e4 | 1921 | |
7a480e25 CL |
1922 | server->retrans_timeo = timeparms.to_initval; |
1923 | server->retrans_count = timeparms.to_retries; | |
1924 | ||
1da177e4 LT |
1925 | clp = nfs4_get_client(&server->addr.sin_addr); |
1926 | if (!clp) { | |
9085bbcb | 1927 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
1da177e4 LT |
1928 | return -EIO; |
1929 | } | |
1930 | ||
1931 | /* Now create transport and client */ | |
1932 | authflavour = RPC_AUTH_UNIX; | |
1933 | if (data->auth_flavourlen != 0) { | |
9085bbcb TM |
1934 | if (data->auth_flavourlen != 1) { |
1935 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", | |
1936 | __FUNCTION__, data->auth_flavourlen); | |
1937 | err = -EINVAL; | |
1938 | goto out_fail; | |
1939 | } | |
1da177e4 LT |
1940 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { |
1941 | err = -EFAULT; | |
1942 | goto out_fail; | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | down_write(&clp->cl_sem); | |
6a19275a | 1947 | if (IS_ERR(clp->cl_rpcclient)) { |
eab5c084 | 1948 | xprt = xprt_create_proto(data->proto, &server->addr, &timeparms); |
1da177e4 LT |
1949 | if (IS_ERR(xprt)) { |
1950 | up_write(&clp->cl_sem); | |
1da177e4 | 1951 | err = PTR_ERR(xprt); |
9085bbcb TM |
1952 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
1953 | __FUNCTION__, err); | |
1da177e4 LT |
1954 | goto out_fail; |
1955 | } | |
1956 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
1957 | server->rpc_ops->version, authflavour); | |
1958 | if (IS_ERR(clnt)) { | |
1959 | up_write(&clp->cl_sem); | |
1da177e4 | 1960 | err = PTR_ERR(clnt); |
9085bbcb TM |
1961 | dprintk("%s: cannot create RPC client. Error = %d\n", |
1962 | __FUNCTION__, err); | |
1da177e4 LT |
1963 | goto out_fail; |
1964 | } | |
1965 | clnt->cl_intr = 1; | |
1966 | clnt->cl_softrtry = 1; | |
1da177e4 | 1967 | clp->cl_rpcclient = clnt; |
1da177e4 LT |
1968 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); |
1969 | nfs_idmap_new(clp); | |
1970 | } | |
1da177e4 LT |
1971 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
1972 | clnt = rpc_clone_client(clp->cl_rpcclient); | |
1973 | if (!IS_ERR(clnt)) | |
1974 | server->nfs4_state = clp; | |
1975 | up_write(&clp->cl_sem); | |
1976 | clp = NULL; | |
1977 | ||
1978 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
1979 | err = PTR_ERR(clnt); |
1980 | dprintk("%s: cannot create RPC client. Error = %d\n", | |
1981 | __FUNCTION__, err); | |
1982 | return err; | |
1da177e4 LT |
1983 | } |
1984 | ||
1985 | server->client = clnt; | |
1986 | ||
1987 | if (server->nfs4_state->cl_idmap == NULL) { | |
9085bbcb | 1988 | dprintk("%s: failed to create idmapper.\n", __FUNCTION__); |
1da177e4 LT |
1989 | return -ENOMEM; |
1990 | } | |
1991 | ||
1992 | if (clnt->cl_auth->au_flavor != authflavour) { | |
6a19275a BF |
1993 | struct rpc_auth *auth; |
1994 | ||
1995 | auth = rpcauth_create(authflavour, clnt); | |
1996 | if (IS_ERR(auth)) { | |
9085bbcb | 1997 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
6a19275a | 1998 | return PTR_ERR(auth); |
1da177e4 LT |
1999 | } |
2000 | } | |
2001 | ||
2002 | sb->s_time_gran = 1; | |
2003 | ||
2004 | sb->s_op = &nfs4_sops; | |
2005 | err = nfs_sb_init(sb, authflavour); | |
2006 | if (err == 0) | |
2007 | return 0; | |
2008 | out_fail: | |
2009 | if (clp) | |
2010 | nfs4_put_client(clp); | |
2011 | return err; | |
2012 | } | |
2013 | ||
2014 | static int nfs4_compare_super(struct super_block *sb, void *data) | |
2015 | { | |
2016 | struct nfs_server *server = data; | |
2017 | struct nfs_server *old = NFS_SB(sb); | |
2018 | ||
2019 | if (strcmp(server->hostname, old->hostname) != 0) | |
2020 | return 0; | |
2021 | if (strcmp(server->mnt_path, old->mnt_path) != 0) | |
2022 | return 0; | |
2023 | return 1; | |
2024 | } | |
2025 | ||
2026 | static void * | |
2027 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) | |
2028 | { | |
2029 | void *p = NULL; | |
2030 | ||
2031 | if (!src->len) | |
2032 | return ERR_PTR(-EINVAL); | |
2033 | if (src->len < maxlen) | |
2034 | maxlen = src->len; | |
2035 | if (dst == NULL) { | |
2036 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); | |
2037 | if (p == NULL) | |
2038 | return ERR_PTR(-ENOMEM); | |
2039 | } | |
2040 | if (copy_from_user(dst, src->data, maxlen)) { | |
f99d49ad | 2041 | kfree(p); |
1da177e4 LT |
2042 | return ERR_PTR(-EFAULT); |
2043 | } | |
2044 | dst[maxlen] = '\0'; | |
2045 | return dst; | |
2046 | } | |
2047 | ||
454e2398 DH |
2048 | static int nfs4_get_sb(struct file_system_type *fs_type, |
2049 | int flags, const char *dev_name, void *raw_data, struct vfsmount *mnt) | |
1da177e4 LT |
2050 | { |
2051 | int error; | |
2052 | struct nfs_server *server; | |
2053 | struct super_block *s; | |
2054 | struct nfs4_mount_data *data = raw_data; | |
2055 | void *p; | |
2056 | ||
9085bbcb TM |
2057 | if (data == NULL) { |
2058 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
454e2398 | 2059 | return -EINVAL; |
9085bbcb TM |
2060 | } |
2061 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { | |
2062 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
454e2398 | 2063 | return -EINVAL; |
1da177e4 LT |
2064 | } |
2065 | ||
bd647545 | 2066 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
1da177e4 | 2067 | if (!server) |
454e2398 | 2068 | return -ENOMEM; |
1da177e4 LT |
2069 | /* Zero out the NFS state stuff */ |
2070 | init_nfsv4_state(server); | |
b7fa0554 | 2071 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 2072 | |
1da177e4 LT |
2073 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
2074 | if (IS_ERR(p)) | |
2075 | goto out_err; | |
2076 | server->hostname = p; | |
2077 | ||
2078 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); | |
2079 | if (IS_ERR(p)) | |
2080 | goto out_err; | |
2081 | server->mnt_path = p; | |
2082 | ||
2083 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, | |
2084 | sizeof(server->ip_addr) - 1); | |
2085 | if (IS_ERR(p)) | |
2086 | goto out_err; | |
2087 | ||
2088 | /* We now require that the mount process passes the remote address */ | |
2089 | if (data->host_addrlen != sizeof(server->addr)) { | |
454e2398 | 2090 | error = -EINVAL; |
1da177e4 LT |
2091 | goto out_free; |
2092 | } | |
2093 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { | |
454e2398 | 2094 | error = -EFAULT; |
1da177e4 LT |
2095 | goto out_free; |
2096 | } | |
2097 | if (server->addr.sin_family != AF_INET || | |
2098 | server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
2099 | dprintk("%s: mount program didn't pass remote IP address!\n", |
2100 | __FUNCTION__); | |
454e2398 | 2101 | error = -EINVAL; |
1da177e4 LT |
2102 | goto out_free; |
2103 | } | |
2104 | ||
9085bbcb | 2105 | /* Fire up rpciod if not yet running */ |
454e2398 DH |
2106 | error = rpciod_up(); |
2107 | if (error < 0) { | |
2108 | dprintk("%s: couldn't start rpciod! Error = %d\n", | |
2109 | __FUNCTION__, error); | |
9085bbcb TM |
2110 | goto out_free; |
2111 | } | |
2112 | ||
1da177e4 | 2113 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
454e2398 DH |
2114 | if (IS_ERR(s)) { |
2115 | error = PTR_ERR(s); | |
1da177e4 | 2116 | goto out_free; |
454e2398 DH |
2117 | } |
2118 | ||
2119 | if (s->s_root) { | |
2120 | kfree(server->mnt_path); | |
2121 | kfree(server->hostname); | |
2122 | kfree(server); | |
2123 | return simple_set_mnt(mnt, s); | |
2124 | } | |
1da177e4 LT |
2125 | |
2126 | s->s_flags = flags; | |
2127 | ||
9b04c997 | 2128 | error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
2129 | if (error) { |
2130 | up_write(&s->s_umount); | |
2131 | deactivate_super(s); | |
454e2398 | 2132 | return error; |
1da177e4 LT |
2133 | } |
2134 | s->s_flags |= MS_ACTIVE; | |
454e2398 | 2135 | return simple_set_mnt(mnt, s); |
1da177e4 | 2136 | out_err: |
454e2398 | 2137 | error = PTR_ERR(p); |
1da177e4 | 2138 | out_free: |
f99d49ad JJ |
2139 | kfree(server->mnt_path); |
2140 | kfree(server->hostname); | |
1da177e4 | 2141 | kfree(server); |
454e2398 | 2142 | return error; |
1da177e4 LT |
2143 | } |
2144 | ||
2145 | static void nfs4_kill_super(struct super_block *sb) | |
2146 | { | |
2147 | struct nfs_server *server = NFS_SB(sb); | |
2148 | ||
2149 | nfs_return_all_delegations(sb); | |
2150 | kill_anon_super(sb); | |
2151 | ||
2152 | nfs4_renewd_prepare_shutdown(server); | |
2153 | ||
2154 | if (server->client != NULL && !IS_ERR(server->client)) | |
2155 | rpc_shutdown_client(server->client); | |
1da177e4 LT |
2156 | |
2157 | destroy_nfsv4_state(server); | |
2158 | ||
967b9281 TM |
2159 | rpciod_down(); |
2160 | ||
01d0ae8b | 2161 | nfs_free_iostats(server->io_stats); |
f99d49ad | 2162 | kfree(server->hostname); |
1da177e4 LT |
2163 | kfree(server); |
2164 | } | |
2165 | ||
2166 | static struct file_system_type nfs4_fs_type = { | |
2167 | .owner = THIS_MODULE, | |
2168 | .name = "nfs4", | |
2169 | .get_sb = nfs4_get_sb, | |
2170 | .kill_sb = nfs4_kill_super, | |
2171 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
2172 | }; | |
2173 | ||
a72b4422 TM |
2174 | static const int nfs_set_port_min = 0; |
2175 | static const int nfs_set_port_max = 65535; | |
2176 | static int param_set_port(const char *val, struct kernel_param *kp) | |
2177 | { | |
2178 | char *endp; | |
2179 | int num = simple_strtol(val, &endp, 0); | |
2180 | if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max) | |
2181 | return -EINVAL; | |
2182 | *((int *)kp->arg) = num; | |
2183 | return 0; | |
2184 | } | |
2185 | ||
2186 | module_param_call(callback_tcpport, param_set_port, param_get_int, | |
2187 | &nfs_callback_set_tcpport, 0644); | |
2188 | ||
58df095b TM |
2189 | static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) |
2190 | { | |
2191 | char *endp; | |
2192 | int num = simple_strtol(val, &endp, 0); | |
2193 | int jif = num * HZ; | |
2194 | if (endp == val || *endp || num < 0 || jif < num) | |
2195 | return -EINVAL; | |
2196 | *((int *)kp->arg) = jif; | |
2197 | return 0; | |
2198 | } | |
2199 | ||
2200 | module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, | |
2201 | &nfs_idmap_cache_timeout, 0644); | |
2202 | ||
1da177e4 LT |
2203 | #define nfs4_init_once(nfsi) \ |
2204 | do { \ | |
2205 | INIT_LIST_HEAD(&(nfsi)->open_states); \ | |
2206 | nfsi->delegation = NULL; \ | |
2207 | nfsi->delegation_state = 0; \ | |
2208 | init_rwsem(&nfsi->rwsem); \ | |
2209 | } while(0) | |
a72b4422 TM |
2210 | |
2211 | static inline int register_nfs4fs(void) | |
2212 | { | |
2213 | int ret; | |
2214 | ||
2215 | ret = nfs_register_sysctl(); | |
2216 | if (ret != 0) | |
2217 | return ret; | |
2218 | ret = register_filesystem(&nfs4_fs_type); | |
2219 | if (ret != 0) | |
2220 | nfs_unregister_sysctl(); | |
2221 | return ret; | |
2222 | } | |
2223 | ||
2224 | static inline void unregister_nfs4fs(void) | |
2225 | { | |
2226 | unregister_filesystem(&nfs4_fs_type); | |
2227 | nfs_unregister_sysctl(); | |
2228 | } | |
1da177e4 LT |
2229 | #else |
2230 | #define nfs4_init_once(nfsi) \ | |
2231 | do { } while (0) | |
2232 | #define register_nfs4fs() (0) | |
2233 | #define unregister_nfs4fs() | |
2234 | #endif | |
2235 | ||
2236 | extern int nfs_init_nfspagecache(void); | |
2237 | extern void nfs_destroy_nfspagecache(void); | |
2238 | extern int nfs_init_readpagecache(void); | |
2239 | extern void nfs_destroy_readpagecache(void); | |
2240 | extern int nfs_init_writepagecache(void); | |
2241 | extern void nfs_destroy_writepagecache(void); | |
2242 | #ifdef CONFIG_NFS_DIRECTIO | |
2243 | extern int nfs_init_directcache(void); | |
2244 | extern void nfs_destroy_directcache(void); | |
2245 | #endif | |
2246 | ||
2247 | static kmem_cache_t * nfs_inode_cachep; | |
2248 | ||
2249 | static struct inode *nfs_alloc_inode(struct super_block *sb) | |
2250 | { | |
2251 | struct nfs_inode *nfsi; | |
2252 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); | |
2253 | if (!nfsi) | |
2254 | return NULL; | |
55296809 CL |
2255 | nfsi->flags = 0UL; |
2256 | nfsi->cache_validity = 0UL; | |
223db122 | 2257 | nfsi->cache_change_attribute = jiffies; |
458818ed TM |
2258 | #ifdef CONFIG_NFS_V3_ACL |
2259 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
2260 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
2261 | #endif | |
e50a1c2e BF |
2262 | #ifdef CONFIG_NFS_V4 |
2263 | nfsi->nfs4_acl = NULL; | |
2264 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2265 | return &nfsi->vfs_inode; |
2266 | } | |
2267 | ||
2268 | static void nfs_destroy_inode(struct inode *inode) | |
2269 | { | |
2270 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2271 | } | |
2272 | ||
2273 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
2274 | { | |
2275 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2276 | ||
2277 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
2278 | SLAB_CTOR_CONSTRUCTOR) { | |
2279 | inode_init_once(&nfsi->vfs_inode); | |
2280 | spin_lock_init(&nfsi->req_lock); | |
2281 | INIT_LIST_HEAD(&nfsi->dirty); | |
2282 | INIT_LIST_HEAD(&nfsi->commit); | |
2283 | INIT_LIST_HEAD(&nfsi->open_files); | |
2284 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
2285 | atomic_set(&nfsi->data_updates, 0); | |
2286 | nfsi->ndirty = 0; | |
2287 | nfsi->ncommit = 0; | |
2288 | nfsi->npages = 0; | |
1da177e4 LT |
2289 | nfs4_init_once(nfsi); |
2290 | } | |
2291 | } | |
2292 | ||
75c96f85 | 2293 | static int nfs_init_inodecache(void) |
1da177e4 LT |
2294 | { |
2295 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2296 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
2297 | 0, (SLAB_RECLAIM_ACCOUNT| |
2298 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
2299 | init_once, NULL); |
2300 | if (nfs_inode_cachep == NULL) | |
2301 | return -ENOMEM; | |
2302 | ||
2303 | return 0; | |
2304 | } | |
2305 | ||
75c96f85 | 2306 | static void nfs_destroy_inodecache(void) |
1da177e4 LT |
2307 | { |
2308 | if (kmem_cache_destroy(nfs_inode_cachep)) | |
2309 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); | |
2310 | } | |
2311 | ||
2312 | /* | |
2313 | * Initialize NFS | |
2314 | */ | |
2315 | static int __init init_nfs_fs(void) | |
2316 | { | |
2317 | int err; | |
2318 | ||
2319 | err = nfs_init_nfspagecache(); | |
2320 | if (err) | |
2321 | goto out4; | |
2322 | ||
2323 | err = nfs_init_inodecache(); | |
2324 | if (err) | |
2325 | goto out3; | |
2326 | ||
2327 | err = nfs_init_readpagecache(); | |
2328 | if (err) | |
2329 | goto out2; | |
2330 | ||
2331 | err = nfs_init_writepagecache(); | |
2332 | if (err) | |
2333 | goto out1; | |
2334 | ||
2335 | #ifdef CONFIG_NFS_DIRECTIO | |
2336 | err = nfs_init_directcache(); | |
2337 | if (err) | |
2338 | goto out0; | |
2339 | #endif | |
2340 | ||
2341 | #ifdef CONFIG_PROC_FS | |
2342 | rpc_proc_register(&nfs_rpcstat); | |
2343 | #endif | |
2344 | err = register_filesystem(&nfs_fs_type); | |
2345 | if (err) | |
2346 | goto out; | |
2347 | if ((err = register_nfs4fs()) != 0) | |
2348 | goto out; | |
2349 | return 0; | |
2350 | out: | |
2351 | #ifdef CONFIG_PROC_FS | |
2352 | rpc_proc_unregister("nfs"); | |
2353 | #endif | |
1da177e4 | 2354 | #ifdef CONFIG_NFS_DIRECTIO |
1da177e4 | 2355 | nfs_destroy_directcache(); |
6b59a754 | 2356 | out0: |
1da177e4 | 2357 | #endif |
6b59a754 | 2358 | nfs_destroy_writepagecache(); |
1da177e4 LT |
2359 | out1: |
2360 | nfs_destroy_readpagecache(); | |
2361 | out2: | |
2362 | nfs_destroy_inodecache(); | |
2363 | out3: | |
2364 | nfs_destroy_nfspagecache(); | |
2365 | out4: | |
2366 | return err; | |
2367 | } | |
2368 | ||
2369 | static void __exit exit_nfs_fs(void) | |
2370 | { | |
2371 | #ifdef CONFIG_NFS_DIRECTIO | |
2372 | nfs_destroy_directcache(); | |
2373 | #endif | |
2374 | nfs_destroy_writepagecache(); | |
2375 | nfs_destroy_readpagecache(); | |
2376 | nfs_destroy_inodecache(); | |
2377 | nfs_destroy_nfspagecache(); | |
2378 | #ifdef CONFIG_PROC_FS | |
2379 | rpc_proc_unregister("nfs"); | |
2380 | #endif | |
2381 | unregister_filesystem(&nfs_fs_type); | |
2382 | unregister_nfs4fs(); | |
2383 | } | |
2384 | ||
2385 | /* Not quite true; I just maintain it */ | |
2386 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2387 | MODULE_LICENSE("GPL"); | |
2388 | ||
2389 | module_init(init_nfs_fs) | |
2390 | module_exit(exit_nfs_fs) |