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