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