Commit | Line | Data |
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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 | { | |
224 | if (bsize < 1024) | |
225 | bsize = NFS_DEF_FILE_IO_BUFFER_SIZE; | |
226 | else if (bsize >= NFS_MAX_FILE_IO_BUFFER_SIZE) | |
227 | bsize = NFS_MAX_FILE_IO_BUFFER_SIZE; | |
228 | ||
229 | return nfs_block_bits(bsize, nrbitsp); | |
230 | } | |
231 | ||
232 | /* | |
233 | * Obtain the root inode of the file system. | |
234 | */ | |
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; | |
310 | if (server->wsize > max_rpc_payload) | |
311 | server->wsize = max_rpc_payload; | |
312 | ||
313 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
314 | if (server->rpages > NFS_READ_MAXIOV) { | |
315 | server->rpages = NFS_READ_MAXIOV; | |
316 | server->rsize = server->rpages << PAGE_CACHE_SHIFT; | |
317 | } | |
318 | ||
319 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
320 | if (server->wpages > NFS_WRITE_MAXIOV) { | |
321 | server->wpages = NFS_WRITE_MAXIOV; | |
322 | server->wsize = server->wpages << PAGE_CACHE_SHIFT; | |
323 | } | |
324 | ||
325 | if (sb->s_blocksize == 0) | |
326 | sb->s_blocksize = nfs_block_bits(server->wsize, | |
327 | &sb->s_blocksize_bits); | |
328 | server->wtmult = nfs_block_bits(fsinfo.wtmult, NULL); | |
329 | ||
330 | server->dtsize = nfs_block_size(fsinfo.dtpref, NULL); | |
331 | if (server->dtsize > PAGE_CACHE_SIZE) | |
332 | server->dtsize = PAGE_CACHE_SIZE; | |
333 | if (server->dtsize > server->rsize) | |
334 | server->dtsize = server->rsize; | |
335 | ||
336 | if (server->flags & NFS_MOUNT_NOAC) { | |
337 | server->acregmin = server->acregmax = 0; | |
338 | server->acdirmin = server->acdirmax = 0; | |
339 | sb->s_flags |= MS_SYNCHRONOUS; | |
340 | } | |
341 | server->backing_dev_info.ra_pages = server->rpages * NFS_MAX_READAHEAD; | |
342 | ||
343 | sb->s_maxbytes = fsinfo.maxfilesize; | |
344 | if (sb->s_maxbytes > MAX_LFS_FILESIZE) | |
345 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
346 | ||
347 | server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; | |
348 | server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0; | |
349 | ||
350 | /* We're airborne Set socket buffersize */ | |
351 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
352 | return 0; | |
353 | /* Yargs. It didn't work out. */ | |
354 | out_no_root: | |
355 | dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error); | |
356 | if (!IS_ERR(root_inode)) | |
357 | iput(root_inode); | |
358 | return no_root_error; | |
359 | } | |
360 | ||
eab5c084 CL |
361 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) |
362 | { | |
363 | to->to_initval = timeo * HZ / 10; | |
364 | to->to_retries = retrans; | |
365 | if (!to->to_retries) | |
366 | to->to_retries = 2; | |
367 | ||
368 | switch (proto) { | |
369 | case IPPROTO_TCP: | |
370 | if (!to->to_initval) | |
371 | to->to_initval = 60 * HZ; | |
03bf4b70 CL |
372 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
373 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
eab5c084 CL |
374 | to->to_increment = to->to_initval; |
375 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
376 | to->to_exponential = 0; | |
377 | break; | |
378 | case IPPROTO_UDP: | |
379 | default: | |
380 | if (!to->to_initval) | |
381 | to->to_initval = 11 * HZ / 10; | |
03bf4b70 CL |
382 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
383 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
384 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
eab5c084 CL |
385 | to->to_exponential = 1; |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
1da177e4 LT |
390 | /* |
391 | * Create an RPC client handle. | |
392 | */ | |
393 | static struct rpc_clnt * | |
394 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) | |
395 | { | |
396 | struct rpc_timeout timeparms; | |
397 | struct rpc_xprt *xprt = NULL; | |
398 | struct rpc_clnt *clnt = NULL; | |
eab5c084 | 399 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; |
1da177e4 | 400 | |
eab5c084 | 401 | nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); |
1da177e4 LT |
402 | |
403 | /* create transport and client */ | |
eab5c084 | 404 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
1da177e4 | 405 | if (IS_ERR(xprt)) { |
9085bbcb TM |
406 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
407 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
408 | return (struct rpc_clnt *)xprt; |
409 | } | |
410 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
411 | server->rpc_ops->version, data->pseudoflavor); | |
412 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
413 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
414 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
415 | goto out_fail; |
416 | } | |
417 | ||
418 | clnt->cl_intr = 1; | |
419 | clnt->cl_softrtry = 1; | |
420 | clnt->cl_chatty = 1; | |
421 | ||
422 | return clnt; | |
423 | ||
424 | out_fail: | |
1da177e4 LT |
425 | return clnt; |
426 | } | |
427 | ||
428 | /* | |
429 | * The way this works is that the mount process passes a structure | |
430 | * in the data argument which contains the server's IP address | |
431 | * and the root file handle obtained from the server's mount | |
432 | * daemon. We stash these away in the private superblock fields. | |
433 | */ | |
434 | static int | |
435 | nfs_fill_super(struct super_block *sb, struct nfs_mount_data *data, int silent) | |
436 | { | |
437 | struct nfs_server *server; | |
438 | rpc_authflavor_t authflavor; | |
439 | ||
440 | server = NFS_SB(sb); | |
441 | sb->s_blocksize_bits = 0; | |
442 | sb->s_blocksize = 0; | |
443 | if (data->bsize) | |
444 | sb->s_blocksize = nfs_block_size(data->bsize, &sb->s_blocksize_bits); | |
445 | if (data->rsize) | |
446 | server->rsize = nfs_block_size(data->rsize, NULL); | |
447 | if (data->wsize) | |
448 | server->wsize = nfs_block_size(data->wsize, NULL); | |
449 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
450 | ||
451 | server->acregmin = data->acregmin*HZ; | |
452 | server->acregmax = data->acregmax*HZ; | |
453 | server->acdirmin = data->acdirmin*HZ; | |
454 | server->acdirmax = data->acdirmax*HZ; | |
455 | ||
456 | /* Start lockd here, before we might error out */ | |
457 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
458 | lockd_up(); | |
459 | ||
460 | server->namelen = data->namlen; | |
461 | server->hostname = kmalloc(strlen(data->hostname) + 1, GFP_KERNEL); | |
462 | if (!server->hostname) | |
463 | return -ENOMEM; | |
464 | strcpy(server->hostname, data->hostname); | |
465 | ||
466 | /* Check NFS protocol revision and initialize RPC op vector | |
467 | * and file handle pool. */ | |
1da177e4 | 468 | #ifdef CONFIG_NFS_V3 |
9085bbcb | 469 | if (server->flags & NFS_MOUNT_VER3) { |
1da177e4 LT |
470 | server->rpc_ops = &nfs_v3_clientops; |
471 | server->caps |= NFS_CAP_READDIRPLUS; | |
1da177e4 LT |
472 | } else { |
473 | server->rpc_ops = &nfs_v2_clientops; | |
474 | } | |
9085bbcb TM |
475 | #else |
476 | server->rpc_ops = &nfs_v2_clientops; | |
477 | #endif | |
1da177e4 LT |
478 | |
479 | /* Fill in pseudoflavor for mount version < 5 */ | |
480 | if (!(data->flags & NFS_MOUNT_SECFLAVOUR)) | |
481 | data->pseudoflavor = RPC_AUTH_UNIX; | |
482 | authflavor = data->pseudoflavor; /* save for sb_init() */ | |
483 | /* XXX maybe we want to add a server->pseudoflavor field */ | |
484 | ||
485 | /* Create RPC client handles */ | |
486 | server->client = nfs_create_client(server, data); | |
487 | if (IS_ERR(server->client)) | |
488 | return PTR_ERR(server->client); | |
489 | /* RFC 2623, sec 2.3.2 */ | |
490 | if (authflavor != RPC_AUTH_UNIX) { | |
6a19275a BF |
491 | struct rpc_auth *auth; |
492 | ||
1da177e4 LT |
493 | server->client_sys = rpc_clone_client(server->client); |
494 | if (IS_ERR(server->client_sys)) | |
495 | return PTR_ERR(server->client_sys); | |
6a19275a BF |
496 | auth = rpcauth_create(RPC_AUTH_UNIX, server->client_sys); |
497 | if (IS_ERR(auth)) | |
498 | return PTR_ERR(auth); | |
1da177e4 LT |
499 | } else { |
500 | atomic_inc(&server->client->cl_count); | |
501 | server->client_sys = server->client; | |
502 | } | |
1da177e4 | 503 | if (server->flags & NFS_MOUNT_VER3) { |
b7fa0554 AG |
504 | #ifdef CONFIG_NFS_V3_ACL |
505 | if (!(server->flags & NFS_MOUNT_NOACL)) { | |
506 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); | |
507 | /* No errors! Assume that Sun nfsacls are supported */ | |
508 | if (!IS_ERR(server->client_acl)) | |
509 | server->caps |= NFS_CAP_ACLS; | |
510 | } | |
511 | #else | |
512 | server->flags &= ~NFS_MOUNT_NOACL; | |
513 | #endif /* CONFIG_NFS_V3_ACL */ | |
055ffbea AG |
514 | /* |
515 | * The VFS shouldn't apply the umask to mode bits. We will | |
516 | * do so ourselves when necessary. | |
517 | */ | |
518 | sb->s_flags |= MS_POSIXACL; | |
1da177e4 LT |
519 | if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN) |
520 | server->namelen = NFS3_MAXNAMLEN; | |
521 | sb->s_time_gran = 1; | |
522 | } else { | |
523 | if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN) | |
524 | server->namelen = NFS2_MAXNAMLEN; | |
525 | } | |
526 | ||
527 | sb->s_op = &nfs_sops; | |
528 | return nfs_sb_init(sb, authflavor); | |
529 | } | |
530 | ||
531 | static int | |
532 | nfs_statfs(struct super_block *sb, struct kstatfs *buf) | |
533 | { | |
534 | struct nfs_server *server = NFS_SB(sb); | |
535 | unsigned char blockbits; | |
536 | unsigned long blockres; | |
537 | struct nfs_fh *rootfh = NFS_FH(sb->s_root->d_inode); | |
538 | struct nfs_fattr fattr; | |
539 | struct nfs_fsstat res = { | |
540 | .fattr = &fattr, | |
541 | }; | |
542 | int error; | |
543 | ||
544 | lock_kernel(); | |
545 | ||
546 | error = server->rpc_ops->statfs(server, rootfh, &res); | |
547 | buf->f_type = NFS_SUPER_MAGIC; | |
548 | if (error < 0) | |
549 | goto out_err; | |
550 | ||
551 | /* | |
552 | * Current versions of glibc do not correctly handle the | |
553 | * case where f_frsize != f_bsize. Eventually we want to | |
554 | * report the value of wtmult in this field. | |
555 | */ | |
556 | buf->f_frsize = sb->s_blocksize; | |
557 | ||
558 | /* | |
559 | * On most *nix systems, f_blocks, f_bfree, and f_bavail | |
560 | * are reported in units of f_frsize. Linux hasn't had | |
561 | * an f_frsize field in its statfs struct until recently, | |
562 | * thus historically Linux's sys_statfs reports these | |
563 | * fields in units of f_bsize. | |
564 | */ | |
565 | buf->f_bsize = sb->s_blocksize; | |
566 | blockbits = sb->s_blocksize_bits; | |
567 | blockres = (1 << blockbits) - 1; | |
568 | buf->f_blocks = (res.tbytes + blockres) >> blockbits; | |
569 | buf->f_bfree = (res.fbytes + blockres) >> blockbits; | |
570 | buf->f_bavail = (res.abytes + blockres) >> blockbits; | |
571 | ||
572 | buf->f_files = res.tfiles; | |
573 | buf->f_ffree = res.afiles; | |
574 | ||
575 | buf->f_namelen = server->namelen; | |
576 | out: | |
577 | unlock_kernel(); | |
578 | ||
579 | return 0; | |
580 | ||
581 | out_err: | |
582 | printk(KERN_WARNING "nfs_statfs: statfs error = %d\n", -error); | |
583 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; | |
584 | goto out; | |
585 | ||
586 | } | |
587 | ||
588 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
589 | { | |
590 | static struct proc_nfs_info { | |
591 | int flag; | |
592 | char *str; | |
593 | char *nostr; | |
594 | } nfs_info[] = { | |
595 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
596 | { NFS_MOUNT_INTR, ",intr", "" }, | |
597 | { NFS_MOUNT_POSIX, ",posix", "" }, | |
1da177e4 LT |
598 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
599 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
600 | { NFS_MOUNT_NONLM, ",nolock", ",lock" }, | |
b7fa0554 | 601 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
1da177e4 LT |
602 | { 0, NULL, NULL } |
603 | }; | |
604 | struct proc_nfs_info *nfs_infop; | |
605 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
3063d8a1 TM |
606 | char buf[12]; |
607 | char *proto; | |
1da177e4 LT |
608 | |
609 | seq_printf(m, ",v%d", nfss->rpc_ops->version); | |
610 | seq_printf(m, ",rsize=%d", nfss->rsize); | |
611 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
612 | if (nfss->acregmin != 3*HZ) | |
613 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); | |
614 | if (nfss->acregmax != 60*HZ) | |
615 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); | |
616 | if (nfss->acdirmin != 30*HZ) | |
617 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); | |
618 | if (nfss->acdirmax != 60*HZ) | |
619 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); | |
620 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
621 | if (nfss->flags & nfs_infop->flag) | |
622 | seq_puts(m, nfs_infop->str); | |
623 | else | |
624 | seq_puts(m, nfs_infop->nostr); | |
625 | } | |
3063d8a1 TM |
626 | switch (nfss->client->cl_xprt->prot) { |
627 | case IPPROTO_TCP: | |
628 | proto = "tcp"; | |
629 | break; | |
630 | case IPPROTO_UDP: | |
631 | proto = "udp"; | |
632 | break; | |
633 | default: | |
634 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); | |
635 | proto = buf; | |
636 | } | |
637 | seq_printf(m, ",proto=%s", proto); | |
1da177e4 LT |
638 | seq_puts(m, ",addr="); |
639 | seq_escape(m, nfss->hostname, " \t\n\\"); | |
640 | return 0; | |
641 | } | |
642 | ||
29884df0 TM |
643 | /** |
644 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
645 | */ | |
646 | int nfs_sync_mapping(struct address_space *mapping) | |
647 | { | |
648 | int ret; | |
649 | ||
650 | if (mapping->nrpages == 0) | |
651 | return 0; | |
652 | unmap_mapping_range(mapping, 0, 0, 0); | |
653 | ret = filemap_fdatawrite(mapping); | |
654 | if (ret != 0) | |
655 | goto out; | |
656 | ret = filemap_fdatawait(mapping); | |
657 | if (ret != 0) | |
658 | goto out; | |
659 | ret = nfs_wb_all(mapping->host); | |
660 | out: | |
661 | return ret; | |
662 | } | |
663 | ||
1da177e4 LT |
664 | /* |
665 | * Invalidate the local caches | |
666 | */ | |
b37b03b7 | 667 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
668 | { |
669 | struct nfs_inode *nfsi = NFS_I(inode); | |
670 | int mode = inode->i_mode; | |
671 | ||
672 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); | |
673 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; | |
674 | ||
675 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
676 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 677 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 678 | else |
55296809 | 679 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 680 | } |
dc59250c | 681 | |
b37b03b7 TM |
682 | void nfs_zap_caches(struct inode *inode) |
683 | { | |
684 | spin_lock(&inode->i_lock); | |
685 | nfs_zap_caches_locked(inode); | |
dc59250c | 686 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
687 | } |
688 | ||
689 | static void nfs_zap_acl_cache(struct inode *inode) | |
690 | { | |
691 | void (*clear_acl_cache)(struct inode *); | |
692 | ||
693 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
694 | if (clear_acl_cache != NULL) | |
695 | clear_acl_cache(inode); | |
dc59250c | 696 | spin_lock(&inode->i_lock); |
55296809 | 697 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 698 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
699 | } |
700 | ||
701 | /* | |
b37b03b7 TM |
702 | * Invalidate, but do not unhash, the inode. |
703 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 704 | */ |
b37b03b7 | 705 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 706 | { |
b37b03b7 TM |
707 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
708 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
709 | } |
710 | ||
711 | struct nfs_find_desc { | |
712 | struct nfs_fh *fh; | |
713 | struct nfs_fattr *fattr; | |
714 | }; | |
715 | ||
716 | /* | |
717 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
718 | * this, and re-exported directories (also seen in NFSv2) | |
719 | * we are forced to allow 2 different inodes to have the same | |
720 | * i_ino. | |
721 | */ | |
722 | static int | |
723 | nfs_find_actor(struct inode *inode, void *opaque) | |
724 | { | |
725 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
726 | struct nfs_fh *fh = desc->fh; | |
727 | struct nfs_fattr *fattr = desc->fattr; | |
728 | ||
729 | if (NFS_FILEID(inode) != fattr->fileid) | |
730 | return 0; | |
731 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
732 | return 0; | |
733 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
734 | return 0; | |
735 | return 1; | |
736 | } | |
737 | ||
738 | static int | |
739 | nfs_init_locked(struct inode *inode, void *opaque) | |
740 | { | |
741 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
742 | struct nfs_fattr *fattr = desc->fattr; | |
743 | ||
744 | NFS_FILEID(inode) = fattr->fileid; | |
745 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
746 | return 0; | |
747 | } | |
748 | ||
749 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
750 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
751 | ||
752 | /* | |
753 | * This is our front-end to iget that looks up inodes by file handle | |
754 | * instead of inode number. | |
755 | */ | |
756 | struct inode * | |
757 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
758 | { | |
759 | struct nfs_find_desc desc = { | |
760 | .fh = fh, | |
761 | .fattr = fattr | |
762 | }; | |
763 | struct inode *inode = NULL; | |
764 | unsigned long hash; | |
765 | ||
766 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
767 | goto out_no_inode; | |
768 | ||
769 | if (!fattr->nlink) { | |
770 | printk("NFS: Buggy server - nlink == 0!\n"); | |
771 | goto out_no_inode; | |
772 | } | |
773 | ||
774 | hash = nfs_fattr_to_ino_t(fattr); | |
775 | ||
776 | if (!(inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc))) | |
777 | goto out_no_inode; | |
778 | ||
779 | if (inode->i_state & I_NEW) { | |
780 | struct nfs_inode *nfsi = NFS_I(inode); | |
781 | ||
782 | /* We set i_ino for the few things that still rely on it, | |
783 | * such as stat(2) */ | |
784 | inode->i_ino = hash; | |
785 | ||
786 | /* We can't support update_atime(), since the server will reset it */ | |
787 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
788 | inode->i_mode = fattr->mode; | |
789 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
790 | * that's precisely what we have in nfs_file_inode_operations. | |
791 | */ | |
92cfc62c | 792 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
1da177e4 LT |
793 | if (S_ISREG(inode->i_mode)) { |
794 | inode->i_fop = &nfs_file_operations; | |
795 | inode->i_data.a_ops = &nfs_file_aops; | |
796 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
797 | } else if (S_ISDIR(inode->i_mode)) { | |
798 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; | |
799 | inode->i_fop = &nfs_dir_operations; | |
800 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
801 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 802 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
1da177e4 LT |
803 | } else if (S_ISLNK(inode->i_mode)) |
804 | inode->i_op = &nfs_symlink_inode_operations; | |
805 | else | |
806 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
807 | ||
33801147 TM |
808 | nfsi->read_cache_jiffies = fattr->time_start; |
809 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
810 | inode->i_atime = fattr->atime; |
811 | inode->i_mtime = fattr->mtime; | |
812 | inode->i_ctime = fattr->ctime; | |
813 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
814 | nfsi->change_attr = fattr->change_attr; | |
815 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
816 | inode->i_nlink = fattr->nlink; | |
817 | inode->i_uid = fattr->uid; | |
818 | inode->i_gid = fattr->gid; | |
819 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
820 | /* | |
821 | * report the blocks in 512byte units | |
822 | */ | |
823 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
824 | inode->i_blksize = inode->i_sb->s_blocksize; | |
825 | } else { | |
826 | inode->i_blocks = fattr->du.nfs2.blocks; | |
827 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
828 | } | |
829 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
830 | nfsi->attrtimeo_timestamp = jiffies; | |
831 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
832 | nfsi->cache_access.cred = NULL; | |
833 | ||
834 | unlock_new_inode(inode); | |
835 | } else | |
836 | nfs_refresh_inode(inode, fattr); | |
837 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
838 | inode->i_sb->s_id, | |
839 | (long long)NFS_FILEID(inode), | |
840 | atomic_read(&inode->i_count)); | |
841 | ||
842 | out: | |
843 | return inode; | |
844 | ||
845 | out_no_inode: | |
846 | printk("nfs_fhget: iget failed\n"); | |
847 | goto out; | |
848 | } | |
849 | ||
850 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
851 | ||
852 | int | |
853 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
854 | { | |
855 | struct inode *inode = dentry->d_inode; | |
856 | struct nfs_fattr fattr; | |
857 | int error; | |
858 | ||
859 | if (attr->ia_valid & ATTR_SIZE) { | |
860 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
861 | attr->ia_valid &= ~ATTR_SIZE; | |
862 | } | |
863 | ||
864 | /* Optimization: if the end result is no change, don't RPC */ | |
865 | attr->ia_valid &= NFS_VALID_ATTRS; | |
866 | if (attr->ia_valid == 0) | |
867 | return 0; | |
868 | ||
869 | lock_kernel(); | |
870 | nfs_begin_data_update(inode); | |
871 | /* Write all dirty data if we're changing file permissions or size */ | |
872 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE)) != 0) { | |
873 | if (filemap_fdatawrite(inode->i_mapping) == 0) | |
874 | filemap_fdatawait(inode->i_mapping); | |
875 | nfs_wb_all(inode); | |
876 | } | |
642ac549 TM |
877 | /* |
878 | * Return any delegations if we're going to change ACLs | |
879 | */ | |
880 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
881 | nfs_inode_return_delegation(inode); | |
1da177e4 | 882 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 883 | if (error == 0) |
1da177e4 | 884 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
885 | nfs_end_data_update(inode); |
886 | unlock_kernel(); | |
887 | return error; | |
888 | } | |
889 | ||
890 | /** | |
891 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
892 | * @inode: pointer to struct inode | |
893 | * @attr: pointer to struct iattr | |
894 | * | |
895 | * Note: we do this in the *proc.c in order to ensure that | |
896 | * it works for things like exclusive creates too. | |
897 | */ | |
898 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
899 | { | |
900 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 901 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
902 | int mode = attr->ia_mode & S_IALLUGO; |
903 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
904 | inode->i_mode = mode; |
905 | } | |
906 | if ((attr->ia_valid & ATTR_UID) != 0) | |
907 | inode->i_uid = attr->ia_uid; | |
908 | if ((attr->ia_valid & ATTR_GID) != 0) | |
909 | inode->i_gid = attr->ia_gid; | |
dc59250c | 910 | spin_lock(&inode->i_lock); |
55296809 | 911 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 912 | spin_unlock(&inode->i_lock); |
65e4308d TM |
913 | } |
914 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
915 | inode->i_size = attr->ia_size; | |
916 | vmtruncate(inode, attr->ia_size); | |
917 | } | |
1da177e4 LT |
918 | } |
919 | ||
412d582e CL |
920 | static int nfs_wait_schedule(void *word) |
921 | { | |
922 | if (signal_pending(current)) | |
923 | return -ERESTARTSYS; | |
924 | schedule(); | |
925 | return 0; | |
926 | } | |
927 | ||
1da177e4 LT |
928 | /* |
929 | * Wait for the inode to get unlocked. | |
1da177e4 | 930 | */ |
412d582e | 931 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
932 | { |
933 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
934 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 935 | sigset_t oldmask; |
1da177e4 | 936 | int error; |
412d582e | 937 | |
412d582e CL |
938 | rpc_clnt_sigmask(clnt, &oldmask); |
939 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
940 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
941 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 942 | |
1da177e4 LT |
943 | return error; |
944 | } | |
945 | ||
412d582e CL |
946 | static void nfs_wake_up_inode(struct inode *inode) |
947 | { | |
948 | struct nfs_inode *nfsi = NFS_I(inode); | |
949 | ||
950 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
951 | smp_mb__after_clear_bit(); | |
952 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
953 | } | |
954 | ||
1da177e4 LT |
955 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
956 | { | |
957 | struct inode *inode = dentry->d_inode; | |
55296809 | 958 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
959 | int err; |
960 | ||
961 | if (__IS_FLG(inode, MS_NOATIME)) | |
962 | need_atime = 0; | |
963 | else if (__IS_FLG(inode, MS_NODIRATIME) && S_ISDIR(inode->i_mode)) | |
964 | need_atime = 0; | |
965 | /* We may force a getattr if the user cares about atime */ | |
966 | if (need_atime) | |
967 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
968 | else | |
969 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
970 | if (!err) | |
971 | generic_fillattr(inode, stat); | |
972 | return err; | |
973 | } | |
974 | ||
975 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred) | |
976 | { | |
977 | struct nfs_open_context *ctx; | |
978 | ||
979 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); | |
980 | if (ctx != NULL) { | |
981 | atomic_set(&ctx->count, 1); | |
982 | ctx->dentry = dget(dentry); | |
983 | ctx->cred = get_rpccred(cred); | |
984 | ctx->state = NULL; | |
985 | ctx->lockowner = current->files; | |
986 | ctx->error = 0; | |
00a92642 | 987 | ctx->dir_cookie = 0; |
1da177e4 LT |
988 | } |
989 | return ctx; | |
990 | } | |
991 | ||
992 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
993 | { | |
994 | if (ctx != NULL) | |
995 | atomic_inc(&ctx->count); | |
996 | return ctx; | |
997 | } | |
998 | ||
999 | void put_nfs_open_context(struct nfs_open_context *ctx) | |
1000 | { | |
1001 | if (atomic_dec_and_test(&ctx->count)) { | |
1002 | if (!list_empty(&ctx->list)) { | |
1003 | struct inode *inode = ctx->dentry->d_inode; | |
1004 | spin_lock(&inode->i_lock); | |
1005 | list_del(&ctx->list); | |
1006 | spin_unlock(&inode->i_lock); | |
1007 | } | |
1008 | if (ctx->state != NULL) | |
1009 | nfs4_close_state(ctx->state, ctx->mode); | |
1010 | if (ctx->cred != NULL) | |
1011 | put_rpccred(ctx->cred); | |
1012 | dput(ctx->dentry); | |
1013 | kfree(ctx); | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1019 | * shared pages | |
1020 | */ | |
1021 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
1022 | { | |
1023 | struct inode *inode = filp->f_dentry->d_inode; | |
1024 | struct nfs_inode *nfsi = NFS_I(inode); | |
1025 | ||
1026 | filp->private_data = get_nfs_open_context(ctx); | |
1027 | spin_lock(&inode->i_lock); | |
1028 | list_add(&ctx->list, &nfsi->open_files); | |
1029 | spin_unlock(&inode->i_lock); | |
1030 | } | |
1031 | ||
d530838b TM |
1032 | /* |
1033 | * Given an inode, search for an open context with the desired characteristics | |
1034 | */ | |
1035 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
1036 | { |
1037 | struct nfs_inode *nfsi = NFS_I(inode); | |
1038 | struct nfs_open_context *pos, *ctx = NULL; | |
1039 | ||
1040 | spin_lock(&inode->i_lock); | |
1041 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
1042 | if (cred != NULL && pos->cred != cred) |
1043 | continue; | |
1da177e4 LT |
1044 | if ((pos->mode & mode) == mode) { |
1045 | ctx = get_nfs_open_context(pos); | |
1046 | break; | |
1047 | } | |
1048 | } | |
1049 | spin_unlock(&inode->i_lock); | |
1050 | return ctx; | |
1051 | } | |
1052 | ||
1053 | void nfs_file_clear_open_context(struct file *filp) | |
1054 | { | |
1055 | struct inode *inode = filp->f_dentry->d_inode; | |
1056 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; | |
1057 | ||
1058 | if (ctx) { | |
1059 | filp->private_data = NULL; | |
1060 | spin_lock(&inode->i_lock); | |
1061 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
1062 | spin_unlock(&inode->i_lock); | |
1063 | put_nfs_open_context(ctx); | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | /* | |
1068 | * These allocate and release file read/write context information. | |
1069 | */ | |
1070 | int nfs_open(struct inode *inode, struct file *filp) | |
1071 | { | |
1072 | struct nfs_open_context *ctx; | |
1073 | struct rpc_cred *cred; | |
1074 | ||
1075 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
1076 | if (IS_ERR(cred)) | |
1077 | return PTR_ERR(cred); | |
1078 | ctx = alloc_nfs_open_context(filp->f_dentry, cred); | |
1079 | put_rpccred(cred); | |
1080 | if (ctx == NULL) | |
1081 | return -ENOMEM; | |
1082 | ctx->mode = filp->f_mode; | |
1083 | nfs_file_set_open_context(filp, ctx); | |
1084 | put_nfs_open_context(ctx); | |
1da177e4 LT |
1085 | return 0; |
1086 | } | |
1087 | ||
1088 | int nfs_release(struct inode *inode, struct file *filp) | |
1089 | { | |
1da177e4 LT |
1090 | nfs_file_clear_open_context(filp); |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * This function is called whenever some part of NFS notices that | |
1096 | * the cached attributes have to be refreshed. | |
1097 | */ | |
1098 | int | |
1099 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1100 | { | |
1101 | int status = -ESTALE; | |
1102 | struct nfs_fattr fattr; | |
1103 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
1104 | |
1105 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
1106 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
1107 | ||
1108 | lock_kernel(); | |
1109 | if (!inode || is_bad_inode(inode)) | |
1110 | goto out_nowait; | |
1111 | if (NFS_STALE(inode)) | |
1112 | goto out_nowait; | |
1113 | ||
412d582e CL |
1114 | status = nfs_wait_on_inode(inode); |
1115 | if (status < 0) | |
1116 | goto out; | |
1117 | if (NFS_STALE(inode)) { | |
1118 | status = -ESTALE; | |
1119 | /* Do we trust the cached ESTALE? */ | |
1120 | if (NFS_ATTRTIMEO(inode) != 0) { | |
1121 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ATIME)) { | |
1122 | /* no */ | |
1123 | } else | |
1124 | goto out; | |
1125 | } | |
1da177e4 | 1126 | } |
1da177e4 | 1127 | |
1da177e4 LT |
1128 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
1129 | if (status != 0) { | |
1130 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
1131 | inode->i_sb->s_id, | |
1132 | (long long)NFS_FILEID(inode), status); | |
1133 | if (status == -ESTALE) { | |
1134 | nfs_zap_caches(inode); | |
1135 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 1136 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
1137 | } |
1138 | goto out; | |
1139 | } | |
1140 | ||
33801147 | 1141 | spin_lock(&inode->i_lock); |
24aa1fe6 | 1142 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 1143 | if (status) { |
33801147 | 1144 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
1145 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
1146 | inode->i_sb->s_id, | |
1147 | (long long)NFS_FILEID(inode), status); | |
1148 | goto out; | |
1149 | } | |
dc59250c | 1150 | spin_unlock(&inode->i_lock); |
55296809 | 1151 | |
7d52e862 | 1152 | nfs_revalidate_mapping(inode, inode->i_mapping); |
55296809 | 1153 | |
24aa1fe6 | 1154 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1155 | nfs_zap_acl_cache(inode); |
55296809 | 1156 | |
1da177e4 LT |
1157 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
1158 | inode->i_sb->s_id, | |
1159 | (long long)NFS_FILEID(inode)); | |
1160 | ||
412d582e CL |
1161 | out: |
1162 | nfs_wake_up_inode(inode); | |
1163 | ||
1da177e4 LT |
1164 | out_nowait: |
1165 | unlock_kernel(); | |
1166 | return status; | |
1167 | } | |
1168 | ||
1169 | int nfs_attribute_timeout(struct inode *inode) | |
1170 | { | |
1171 | struct nfs_inode *nfsi = NFS_I(inode); | |
1172 | ||
1173 | if (nfs_have_delegation(inode, FMODE_READ)) | |
1174 | return 0; | |
1175 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1180 | * @server - pointer to nfs_server struct | |
1181 | * @inode - pointer to inode struct | |
1182 | * | |
1183 | * Updates inode attribute information by retrieving the data from the server. | |
1184 | */ | |
1185 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1186 | { | |
55296809 | 1187 | if (!(NFS_I(inode)->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA)) |
1da177e4 LT |
1188 | && !nfs_attribute_timeout(inode)) |
1189 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1190 | return __nfs_revalidate_inode(server, inode); | |
1191 | } | |
1192 | ||
7d52e862 TM |
1193 | /** |
1194 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1195 | * @inode - pointer to host inode | |
1196 | * @mapping - pointer to mapping | |
1197 | */ | |
1198 | void nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1199 | { | |
1200 | struct nfs_inode *nfsi = NFS_I(inode); | |
1201 | ||
55296809 | 1202 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
29884df0 TM |
1203 | if (S_ISREG(inode->i_mode)) |
1204 | nfs_sync_mapping(mapping); | |
7d52e862 | 1205 | invalidate_inode_pages2(mapping); |
dc59250c CL |
1206 | |
1207 | spin_lock(&inode->i_lock); | |
55296809 | 1208 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
7d52e862 TM |
1209 | if (S_ISDIR(inode->i_mode)) { |
1210 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
1211 | /* This ensures we revalidate child dentries */ | |
913a70fc | 1212 | nfsi->cache_change_attribute = jiffies; |
7d52e862 | 1213 | } |
dc59250c CL |
1214 | spin_unlock(&inode->i_lock); |
1215 | ||
7d52e862 TM |
1216 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
1217 | inode->i_sb->s_id, | |
1218 | (long long)NFS_FILEID(inode)); | |
1219 | } | |
1220 | } | |
1221 | ||
1da177e4 LT |
1222 | /** |
1223 | * nfs_begin_data_update | |
1224 | * @inode - pointer to inode | |
1225 | * Declare that a set of operations will update file data on the server | |
1226 | */ | |
1227 | void nfs_begin_data_update(struct inode *inode) | |
1228 | { | |
1229 | atomic_inc(&NFS_I(inode)->data_updates); | |
1230 | } | |
1231 | ||
1232 | /** | |
1233 | * nfs_end_data_update | |
1234 | * @inode - pointer to inode | |
1235 | * Declare end of the operations that will update file data | |
1236 | * This will mark the inode as immediately needing revalidation | |
1237 | * of its attribute cache. | |
1238 | */ | |
1239 | void nfs_end_data_update(struct inode *inode) | |
1240 | { | |
1241 | struct nfs_inode *nfsi = NFS_I(inode); | |
1242 | ||
1243 | if (!nfs_have_delegation(inode, FMODE_READ)) { | |
decf491f TM |
1244 | /* Directories and symlinks: invalidate page cache */ |
1245 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
1246 | spin_lock(&inode->i_lock); | |
55296809 | 1247 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
1248 | spin_unlock(&inode->i_lock); |
1249 | } | |
1da177e4 | 1250 | } |
913a70fc | 1251 | nfsi->cache_change_attribute = jiffies; |
1da177e4 LT |
1252 | atomic_dec(&nfsi->data_updates); |
1253 | } | |
1254 | ||
1da177e4 | 1255 | /** |
33801147 | 1256 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1257 | * @inode - pointer to inode |
1258 | * @fattr - updated attributes | |
1259 | * | |
1260 | * Verifies the attribute cache. If we have just changed the attributes, | |
1261 | * so that fattr carries weak cache consistency data, then it may | |
1262 | * also update the ctime/mtime/change_attribute. | |
1263 | */ | |
33801147 | 1264 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1265 | { |
1266 | struct nfs_inode *nfsi = NFS_I(inode); | |
1267 | loff_t cur_size, new_isize; | |
1268 | int data_unstable; | |
1269 | ||
dc59250c | 1270 | |
1da177e4 LT |
1271 | /* Are we in the process of updating data on the server? */ |
1272 | data_unstable = nfs_caches_unstable(inode); | |
1273 | ||
1274 | if (fattr->valid & NFS_ATTR_FATTR_V4) { | |
1275 | if ((fattr->valid & NFS_ATTR_PRE_CHANGE) != 0 | |
1276 | && nfsi->change_attr == fattr->pre_change_attr) | |
1277 | nfsi->change_attr = fattr->change_attr; | |
fe51beec | 1278 | if (nfsi->change_attr != fattr->change_attr) { |
55296809 | 1279 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
fe51beec | 1280 | if (!data_unstable) |
55296809 | 1281 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; |
fe51beec | 1282 | } |
1da177e4 LT |
1283 | } |
1284 | ||
dc59250c | 1285 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) { |
1da177e4 | 1286 | return 0; |
dc59250c | 1287 | } |
1da177e4 LT |
1288 | |
1289 | /* Has the inode gone and changed behind our back? */ | |
1290 | if (nfsi->fileid != fattr->fileid | |
dc59250c | 1291 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1da177e4 | 1292 | return -EIO; |
dc59250c | 1293 | } |
1da177e4 LT |
1294 | |
1295 | cur_size = i_size_read(inode); | |
1296 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1297 | ||
1298 | /* If we have atomic WCC data, we may update some attributes */ | |
1299 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
1300 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) | |
1301 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1302 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) | |
1303 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
1304 | } | |
1305 | ||
1306 | /* Verify a few of the more important attributes */ | |
fe51beec | 1307 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
55296809 | 1308 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
fe51beec | 1309 | if (!data_unstable) |
55296809 | 1310 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; |
fe51beec TM |
1311 | } |
1312 | if (cur_size != new_isize) { | |
55296809 | 1313 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
fe51beec | 1314 | if (nfsi->npages == 0) |
55296809 | 1315 | nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE; |
fe51beec | 1316 | } |
1da177e4 LT |
1317 | |
1318 | /* Have any file permissions changed? */ | |
1319 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
1320 | || inode->i_uid != fattr->uid | |
1321 | || inode->i_gid != fattr->gid) | |
55296809 | 1322 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1323 | |
1324 | /* Has the link count changed? */ | |
1325 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 1326 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1327 | |
1328 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
55296809 | 1329 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 1330 | |
33801147 | 1331 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1332 | return 0; |
1333 | } | |
1334 | ||
33801147 TM |
1335 | /** |
1336 | * nfs_refresh_inode - try to update the inode attribute cache | |
1337 | * @inode - pointer to inode | |
1338 | * @fattr - updated attributes | |
1339 | * | |
1340 | * Check that an RPC call that returned attributes has not overlapped with | |
1341 | * other recent updates of the inode metadata, then decide whether it is | |
1342 | * safe to do a full update of the inode attributes, or whether just to | |
1343 | * call nfs_check_inode_attributes. | |
1344 | */ | |
1345 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1346 | { | |
1347 | struct nfs_inode *nfsi = NFS_I(inode); | |
1348 | int status; | |
1349 | ||
1350 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1351 | return 0; | |
1352 | spin_lock(&inode->i_lock); | |
1353 | nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; | |
33801147 | 1354 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 1355 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
1356 | else |
1357 | status = nfs_check_inode_attributes(inode, fattr); | |
1358 | ||
1359 | spin_unlock(&inode->i_lock); | |
1360 | return status; | |
1361 | } | |
1362 | ||
decf491f TM |
1363 | /** |
1364 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1365 | * @inode - pointer to inode | |
1366 | * @fattr - updated attributes | |
1367 | * | |
1368 | * After an operation that has changed the inode metadata, mark the | |
1369 | * attribute cache as being invalid, then try to update it. | |
1370 | */ | |
1371 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1372 | { | |
1373 | struct nfs_inode *nfsi = NFS_I(inode); | |
1374 | int status = 0; | |
1375 | ||
1376 | spin_lock(&inode->i_lock); | |
1377 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { | |
1378 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS; | |
1379 | goto out; | |
1380 | } | |
24aa1fe6 | 1381 | status = nfs_update_inode(inode, fattr); |
decf491f TM |
1382 | out: |
1383 | spin_unlock(&inode->i_lock); | |
1384 | return status; | |
1385 | } | |
1386 | ||
1da177e4 LT |
1387 | /* |
1388 | * Many nfs protocol calls return the new file attributes after | |
1389 | * an operation. Here we update the inode to reflect the state | |
1390 | * of the server's inode. | |
1391 | * | |
1392 | * This is a bit tricky because we have to make sure all dirty pages | |
1393 | * have been sent off to the server before calling invalidate_inode_pages. | |
1394 | * To make sure no other process adds more write requests while we try | |
1395 | * our best to flush them, we make them sleep during the attribute refresh. | |
1396 | * | |
1397 | * A very similar scenario holds for the dir cache. | |
1398 | */ | |
24aa1fe6 | 1399 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1400 | { |
1401 | struct nfs_inode *nfsi = NFS_I(inode); | |
951a143b | 1402 | loff_t cur_isize, new_isize; |
1da177e4 | 1403 | unsigned int invalid = 0; |
24aa1fe6 | 1404 | int data_stable; |
1da177e4 LT |
1405 | |
1406 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
1407 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
1408 | atomic_read(&inode->i_count), fattr->valid); | |
1409 | ||
1410 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1411 | return 0; | |
1412 | ||
1413 | if (nfsi->fileid != fattr->fileid) { | |
1414 | printk(KERN_ERR "%s: inode number mismatch\n" | |
1415 | "expected (%s/0x%Lx), got (%s/0x%Lx)\n", | |
1416 | __FUNCTION__, | |
1417 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1418 | inode->i_sb->s_id, (long long)fattr->fileid); | |
1419 | goto out_err; | |
1420 | } | |
1421 | ||
1422 | /* | |
1423 | * Make sure the inode's type hasn't changed. | |
1424 | */ | |
33801147 | 1425 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1426 | goto out_changed; |
1427 | ||
1428 | /* | |
1429 | * Update the read time so we don't revalidate too often. | |
1430 | */ | |
33801147 TM |
1431 | nfsi->read_cache_jiffies = fattr->time_start; |
1432 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
1433 | |
1434 | /* Are we racing with known updates of the metadata on the server? */ | |
24aa1fe6 TM |
1435 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
1436 | if (data_stable) | |
1437 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME); | |
1da177e4 | 1438 | |
951a143b | 1439 | /* Check if our cached file size is stale */ |
1da177e4 LT |
1440 | new_isize = nfs_size_to_loff_t(fattr->size); |
1441 | cur_isize = i_size_read(inode); | |
951a143b TM |
1442 | if (new_isize != cur_isize) { |
1443 | /* Do we perhaps have any outstanding writes? */ | |
1444 | if (nfsi->npages == 0) { | |
1445 | /* No, but did we race with nfs_end_data_update()? */ | |
24aa1fe6 | 1446 | if (data_stable) { |
1da177e4 | 1447 | inode->i_size = new_isize; |
951a143b | 1448 | invalid |= NFS_INO_INVALID_DATA; |
1da177e4 | 1449 | } |
951a143b TM |
1450 | invalid |= NFS_INO_INVALID_ATTR; |
1451 | } else if (new_isize > cur_isize) { | |
1da177e4 LT |
1452 | inode->i_size = new_isize; |
1453 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1454 | } | |
24aa1fe6 | 1455 | nfsi->cache_change_attribute = jiffies; |
951a143b TM |
1456 | dprintk("NFS: isize change on server for file %s/%ld\n", |
1457 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1458 | } |
1459 | ||
951a143b | 1460 | /* Check if the mtime agrees */ |
1da177e4 LT |
1461 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
1462 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
951a143b TM |
1463 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
1464 | inode->i_sb->s_id, inode->i_ino); | |
24aa1fe6 TM |
1465 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
1466 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
1467 | } |
1468 | ||
1469 | if ((fattr->valid & NFS_ATTR_FATTR_V4) | |
1470 | && nfsi->change_attr != fattr->change_attr) { | |
951a143b | 1471 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1da177e4 | 1472 | inode->i_sb->s_id, inode->i_ino); |
1da177e4 | 1473 | nfsi->change_attr = fattr->change_attr; |
24aa1fe6 TM |
1474 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1475 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
1476 | } |
1477 | ||
ada70d94 TM |
1478 | /* If ctime has changed we should definitely clear access+acl caches */ |
1479 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { | |
24aa1fe6 | 1480 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
ada70d94 | 1481 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
24aa1fe6 | 1482 | nfsi->cache_change_attribute = jiffies; |
ada70d94 | 1483 | } |
1da177e4 LT |
1484 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
1485 | ||
1486 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
1487 | inode->i_uid != fattr->uid || | |
1488 | inode->i_gid != fattr->gid) | |
ada70d94 | 1489 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
1490 | |
1491 | inode->i_mode = fattr->mode; | |
1492 | inode->i_nlink = fattr->nlink; | |
1493 | inode->i_uid = fattr->uid; | |
1494 | inode->i_gid = fattr->gid; | |
1495 | ||
1496 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
1497 | /* | |
1498 | * report the blocks in 512byte units | |
1499 | */ | |
1500 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1501 | inode->i_blksize = inode->i_sb->s_blocksize; | |
1502 | } else { | |
1503 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1504 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
1505 | } | |
1506 | ||
1507 | /* Update attrtimeo value if we're out of the unstable period */ | |
1508 | if (invalid & NFS_INO_INVALID_ATTR) { | |
1509 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
1510 | nfsi->attrtimeo_timestamp = jiffies; | |
1511 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { | |
1512 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
1513 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1514 | nfsi->attrtimeo_timestamp = jiffies; | |
1515 | } | |
1516 | /* Don't invalidate the data if we were to blame */ | |
1517 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1518 | || S_ISLNK(inode->i_mode))) | |
1519 | invalid &= ~NFS_INO_INVALID_DATA; | |
24aa1fe6 TM |
1520 | if (data_stable) |
1521 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1522 | if (!nfs_have_delegation(inode, FMODE_READ)) |
55296809 | 1523 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1524 | |
1525 | return 0; | |
1526 | out_changed: | |
1527 | /* | |
1528 | * Big trouble! The inode has become a different object. | |
1529 | */ | |
1530 | #ifdef NFS_PARANOIA | |
1531 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", | |
1532 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
1533 | #endif | |
b37b03b7 | 1534 | out_err: |
1da177e4 LT |
1535 | /* |
1536 | * No need to worry about unhashing the dentry, as the | |
1537 | * lookup validation will know that the inode is bad. | |
1538 | * (But we fall through to invalidate the caches.) | |
1539 | */ | |
1540 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1541 | return -ESTALE; |
1542 | } | |
1543 | ||
1544 | /* | |
1545 | * File system information | |
1546 | */ | |
1547 | ||
1548 | static int nfs_set_super(struct super_block *s, void *data) | |
1549 | { | |
1550 | s->s_fs_info = data; | |
1551 | return set_anon_super(s, data); | |
1552 | } | |
1553 | ||
1554 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1555 | { | |
1556 | struct nfs_server *server = data; | |
1557 | struct nfs_server *old = NFS_SB(sb); | |
1558 | ||
1559 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) | |
1560 | return 0; | |
1561 | if (old->addr.sin_port != server->addr.sin_port) | |
1562 | return 0; | |
1563 | return !nfs_compare_fh(&old->fh, &server->fh); | |
1564 | } | |
1565 | ||
1566 | static struct super_block *nfs_get_sb(struct file_system_type *fs_type, | |
1567 | int flags, const char *dev_name, void *raw_data) | |
1568 | { | |
1569 | int error; | |
9085bbcb | 1570 | struct nfs_server *server = NULL; |
1da177e4 LT |
1571 | struct super_block *s; |
1572 | struct nfs_fh *root; | |
1573 | struct nfs_mount_data *data = raw_data; | |
1574 | ||
9085bbcb TM |
1575 | s = ERR_PTR(-EINVAL); |
1576 | if (data == NULL) { | |
1577 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
1578 | goto out_err; | |
1579 | } | |
1580 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { | |
1581 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
1582 | goto out_err; | |
1da177e4 | 1583 | } |
9085bbcb TM |
1584 | switch (data->version) { |
1585 | case 1: | |
1586 | data->namlen = 0; | |
1587 | case 2: | |
1588 | data->bsize = 0; | |
1589 | case 3: | |
1590 | if (data->flags & NFS_MOUNT_VER3) { | |
1591 | dprintk("%s: mount structure version %d does not support NFSv3\n", | |
1592 | __FUNCTION__, | |
1593 | data->version); | |
1594 | goto out_err; | |
1595 | } | |
1596 | data->root.size = NFS2_FHSIZE; | |
1597 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1598 | case 4: | |
1599 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { | |
1600 | dprintk("%s: mount structure version %d does not support strong security\n", | |
1601 | __FUNCTION__, | |
1602 | data->version); | |
1603 | goto out_err; | |
1604 | } | |
1605 | case 5: | |
1606 | memset(data->context, 0, sizeof(data->context)); | |
1607 | } | |
1608 | #ifndef CONFIG_NFS_V3 | |
1609 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ | |
1610 | s = ERR_PTR(-EPROTONOSUPPORT); | |
1611 | if (data->flags & NFS_MOUNT_VER3) { | |
1612 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); | |
1613 | goto out_err; | |
1614 | } | |
1615 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 | 1616 | |
9085bbcb | 1617 | s = ERR_PTR(-ENOMEM); |
1da177e4 LT |
1618 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); |
1619 | if (!server) | |
9085bbcb | 1620 | goto out_err; |
1da177e4 LT |
1621 | memset(server, 0, sizeof(struct nfs_server)); |
1622 | /* Zero out the NFS state stuff */ | |
1623 | init_nfsv4_state(server); | |
b7fa0554 | 1624 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 1625 | |
1da177e4 LT |
1626 | root = &server->fh; |
1627 | if (data->flags & NFS_MOUNT_VER3) | |
1628 | root->size = data->root.size; | |
1629 | else | |
1630 | root->size = NFS2_FHSIZE; | |
9085bbcb | 1631 | s = ERR_PTR(-EINVAL); |
1da177e4 | 1632 | if (root->size > sizeof(root->data)) { |
9085bbcb TM |
1633 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
1634 | goto out_err; | |
1da177e4 LT |
1635 | } |
1636 | memcpy(root->data, data->root.data, root->size); | |
1637 | ||
1638 | /* We now require that the mount process passes the remote address */ | |
1639 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); | |
1640 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
1641 | dprintk("%s: mount program didn't pass remote address!\n", |
1642 | __FUNCTION__); | |
1643 | goto out_err; | |
1da177e4 LT |
1644 | } |
1645 | ||
9085bbcb TM |
1646 | /* Fire up rpciod if not yet running */ |
1647 | s = ERR_PTR(rpciod_up()); | |
1648 | if (IS_ERR(s)) { | |
1649 | dprintk("%s: couldn't start rpciod! Error = %ld\n", | |
1650 | __FUNCTION__, PTR_ERR(s)); | |
1651 | goto out_err; | |
1da177e4 LT |
1652 | } |
1653 | ||
9085bbcb TM |
1654 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
1655 | if (IS_ERR(s) || s->s_root) | |
1656 | goto out_rpciod_down; | |
1da177e4 | 1657 | |
9085bbcb | 1658 | s->s_flags = flags; |
1da177e4 LT |
1659 | |
1660 | error = nfs_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0); | |
1661 | if (error) { | |
1662 | up_write(&s->s_umount); | |
1663 | deactivate_super(s); | |
1664 | return ERR_PTR(error); | |
1665 | } | |
1666 | s->s_flags |= MS_ACTIVE; | |
1667 | return s; | |
9085bbcb TM |
1668 | out_rpciod_down: |
1669 | rpciod_down(); | |
1670 | out_err: | |
1671 | kfree(server); | |
1672 | return s; | |
1da177e4 LT |
1673 | } |
1674 | ||
1675 | static void nfs_kill_super(struct super_block *s) | |
1676 | { | |
1677 | struct nfs_server *server = NFS_SB(s); | |
1678 | ||
1679 | kill_anon_super(s); | |
1680 | ||
6a19275a | 1681 | if (!IS_ERR(server->client)) |
1da177e4 | 1682 | rpc_shutdown_client(server->client); |
6a19275a | 1683 | if (!IS_ERR(server->client_sys)) |
1da177e4 | 1684 | rpc_shutdown_client(server->client_sys); |
b7fa0554 AG |
1685 | if (!IS_ERR(server->client_acl)) |
1686 | rpc_shutdown_client(server->client_acl); | |
1da177e4 LT |
1687 | |
1688 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
1689 | lockd_down(); /* release rpc.lockd */ | |
1690 | ||
1691 | rpciod_down(); /* release rpciod */ | |
1692 | ||
f99d49ad | 1693 | kfree(server->hostname); |
1da177e4 LT |
1694 | kfree(server); |
1695 | } | |
1696 | ||
1697 | static struct file_system_type nfs_fs_type = { | |
1698 | .owner = THIS_MODULE, | |
1699 | .name = "nfs", | |
1700 | .get_sb = nfs_get_sb, | |
1701 | .kill_sb = nfs_kill_super, | |
1702 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
1703 | }; | |
1704 | ||
1705 | #ifdef CONFIG_NFS_V4 | |
1706 | ||
1707 | static void nfs4_clear_inode(struct inode *); | |
1708 | ||
1709 | ||
1710 | static struct super_operations nfs4_sops = { | |
1711 | .alloc_inode = nfs_alloc_inode, | |
1712 | .destroy_inode = nfs_destroy_inode, | |
1713 | .write_inode = nfs_write_inode, | |
1714 | .delete_inode = nfs_delete_inode, | |
1715 | .statfs = nfs_statfs, | |
1716 | .clear_inode = nfs4_clear_inode, | |
1717 | .umount_begin = nfs_umount_begin, | |
1718 | .show_options = nfs_show_options, | |
1719 | }; | |
1720 | ||
1721 | /* | |
1722 | * Clean out any remaining NFSv4 state that might be left over due | |
1723 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1724 | * nfs_open(). | |
1725 | */ | |
1726 | static void nfs4_clear_inode(struct inode *inode) | |
1727 | { | |
1728 | struct nfs_inode *nfsi = NFS_I(inode); | |
1729 | ||
1730 | /* If we are holding a delegation, return it! */ | |
cae7a073 | 1731 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
1732 | /* First call standard NFS clear_inode() code */ |
1733 | nfs_clear_inode(inode); | |
1734 | /* Now clear out any remaining state */ | |
1735 | while (!list_empty(&nfsi->open_states)) { | |
1736 | struct nfs4_state *state; | |
1737 | ||
1738 | state = list_entry(nfsi->open_states.next, | |
1739 | struct nfs4_state, | |
1740 | inode_states); | |
1741 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", | |
1742 | __FUNCTION__, | |
1743 | inode->i_sb->s_id, | |
1744 | (long long)NFS_FILEID(inode), | |
1745 | state); | |
1746 | BUG_ON(atomic_read(&state->count) != 1); | |
1747 | nfs4_close_state(state, state->state); | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | ||
1752 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) | |
1753 | { | |
1754 | struct nfs_server *server; | |
1755 | struct nfs4_client *clp = NULL; | |
1756 | struct rpc_xprt *xprt = NULL; | |
1757 | struct rpc_clnt *clnt = NULL; | |
1758 | struct rpc_timeout timeparms; | |
1759 | rpc_authflavor_t authflavour; | |
eab5c084 | 1760 | int err = -EIO; |
1da177e4 LT |
1761 | |
1762 | sb->s_blocksize_bits = 0; | |
1763 | sb->s_blocksize = 0; | |
1764 | server = NFS_SB(sb); | |
1765 | if (data->rsize != 0) | |
1766 | server->rsize = nfs_block_size(data->rsize, NULL); | |
1767 | if (data->wsize != 0) | |
1768 | server->wsize = nfs_block_size(data->wsize, NULL); | |
1769 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
1770 | server->caps = NFS_CAP_ATOMIC_OPEN; | |
1771 | ||
1772 | server->acregmin = data->acregmin*HZ; | |
1773 | server->acregmax = data->acregmax*HZ; | |
1774 | server->acdirmin = data->acdirmin*HZ; | |
1775 | server->acdirmax = data->acdirmax*HZ; | |
1776 | ||
1777 | server->rpc_ops = &nfs_v4_clientops; | |
1da177e4 | 1778 | |
eab5c084 | 1779 | nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); |
1da177e4 LT |
1780 | |
1781 | clp = nfs4_get_client(&server->addr.sin_addr); | |
1782 | if (!clp) { | |
9085bbcb | 1783 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
1da177e4 LT |
1784 | return -EIO; |
1785 | } | |
1786 | ||
1787 | /* Now create transport and client */ | |
1788 | authflavour = RPC_AUTH_UNIX; | |
1789 | if (data->auth_flavourlen != 0) { | |
9085bbcb TM |
1790 | if (data->auth_flavourlen != 1) { |
1791 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", | |
1792 | __FUNCTION__, data->auth_flavourlen); | |
1793 | err = -EINVAL; | |
1794 | goto out_fail; | |
1795 | } | |
1da177e4 LT |
1796 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { |
1797 | err = -EFAULT; | |
1798 | goto out_fail; | |
1799 | } | |
1800 | } | |
1801 | ||
1802 | down_write(&clp->cl_sem); | |
6a19275a | 1803 | if (IS_ERR(clp->cl_rpcclient)) { |
eab5c084 | 1804 | xprt = xprt_create_proto(data->proto, &server->addr, &timeparms); |
1da177e4 LT |
1805 | if (IS_ERR(xprt)) { |
1806 | up_write(&clp->cl_sem); | |
1da177e4 | 1807 | err = PTR_ERR(xprt); |
9085bbcb TM |
1808 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
1809 | __FUNCTION__, err); | |
1da177e4 LT |
1810 | goto out_fail; |
1811 | } | |
1812 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
1813 | server->rpc_ops->version, authflavour); | |
1814 | if (IS_ERR(clnt)) { | |
1815 | up_write(&clp->cl_sem); | |
1da177e4 | 1816 | err = PTR_ERR(clnt); |
9085bbcb TM |
1817 | dprintk("%s: cannot create RPC client. Error = %d\n", |
1818 | __FUNCTION__, err); | |
1da177e4 LT |
1819 | goto out_fail; |
1820 | } | |
1821 | clnt->cl_intr = 1; | |
1822 | clnt->cl_softrtry = 1; | |
1823 | clnt->cl_chatty = 1; | |
1824 | clp->cl_rpcclient = clnt; | |
1825 | clp->cl_cred = rpcauth_lookupcred(clnt->cl_auth, 0); | |
1826 | if (IS_ERR(clp->cl_cred)) { | |
1827 | up_write(&clp->cl_sem); | |
1828 | err = PTR_ERR(clp->cl_cred); | |
1829 | clp->cl_cred = NULL; | |
1830 | goto out_fail; | |
1831 | } | |
1832 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); | |
1833 | nfs_idmap_new(clp); | |
1834 | } | |
1835 | if (list_empty(&clp->cl_superblocks)) { | |
1836 | err = nfs4_init_client(clp); | |
1837 | if (err != 0) { | |
1838 | up_write(&clp->cl_sem); | |
1839 | goto out_fail; | |
1840 | } | |
1841 | } | |
1842 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); | |
1843 | clnt = rpc_clone_client(clp->cl_rpcclient); | |
1844 | if (!IS_ERR(clnt)) | |
1845 | server->nfs4_state = clp; | |
1846 | up_write(&clp->cl_sem); | |
1847 | clp = NULL; | |
1848 | ||
1849 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
1850 | err = PTR_ERR(clnt); |
1851 | dprintk("%s: cannot create RPC client. Error = %d\n", | |
1852 | __FUNCTION__, err); | |
1853 | return err; | |
1da177e4 LT |
1854 | } |
1855 | ||
1856 | server->client = clnt; | |
1857 | ||
1858 | if (server->nfs4_state->cl_idmap == NULL) { | |
9085bbcb | 1859 | dprintk("%s: failed to create idmapper.\n", __FUNCTION__); |
1da177e4 LT |
1860 | return -ENOMEM; |
1861 | } | |
1862 | ||
1863 | if (clnt->cl_auth->au_flavor != authflavour) { | |
6a19275a BF |
1864 | struct rpc_auth *auth; |
1865 | ||
1866 | auth = rpcauth_create(authflavour, clnt); | |
1867 | if (IS_ERR(auth)) { | |
9085bbcb | 1868 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
6a19275a | 1869 | return PTR_ERR(auth); |
1da177e4 LT |
1870 | } |
1871 | } | |
1872 | ||
1873 | sb->s_time_gran = 1; | |
1874 | ||
1875 | sb->s_op = &nfs4_sops; | |
1876 | err = nfs_sb_init(sb, authflavour); | |
1877 | if (err == 0) | |
1878 | return 0; | |
1879 | out_fail: | |
1880 | if (clp) | |
1881 | nfs4_put_client(clp); | |
1882 | return err; | |
1883 | } | |
1884 | ||
1885 | static int nfs4_compare_super(struct super_block *sb, void *data) | |
1886 | { | |
1887 | struct nfs_server *server = data; | |
1888 | struct nfs_server *old = NFS_SB(sb); | |
1889 | ||
1890 | if (strcmp(server->hostname, old->hostname) != 0) | |
1891 | return 0; | |
1892 | if (strcmp(server->mnt_path, old->mnt_path) != 0) | |
1893 | return 0; | |
1894 | return 1; | |
1895 | } | |
1896 | ||
1897 | static void * | |
1898 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) | |
1899 | { | |
1900 | void *p = NULL; | |
1901 | ||
1902 | if (!src->len) | |
1903 | return ERR_PTR(-EINVAL); | |
1904 | if (src->len < maxlen) | |
1905 | maxlen = src->len; | |
1906 | if (dst == NULL) { | |
1907 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); | |
1908 | if (p == NULL) | |
1909 | return ERR_PTR(-ENOMEM); | |
1910 | } | |
1911 | if (copy_from_user(dst, src->data, maxlen)) { | |
f99d49ad | 1912 | kfree(p); |
1da177e4 LT |
1913 | return ERR_PTR(-EFAULT); |
1914 | } | |
1915 | dst[maxlen] = '\0'; | |
1916 | return dst; | |
1917 | } | |
1918 | ||
1919 | static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, | |
1920 | int flags, const char *dev_name, void *raw_data) | |
1921 | { | |
1922 | int error; | |
1923 | struct nfs_server *server; | |
1924 | struct super_block *s; | |
1925 | struct nfs4_mount_data *data = raw_data; | |
1926 | void *p; | |
1927 | ||
9085bbcb TM |
1928 | if (data == NULL) { |
1929 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
1930 | return ERR_PTR(-EINVAL); | |
1931 | } | |
1932 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { | |
1933 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
1da177e4 LT |
1934 | return ERR_PTR(-EINVAL); |
1935 | } | |
1936 | ||
1937 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1938 | if (!server) | |
1939 | return ERR_PTR(-ENOMEM); | |
1940 | memset(server, 0, sizeof(struct nfs_server)); | |
1941 | /* Zero out the NFS state stuff */ | |
1942 | init_nfsv4_state(server); | |
b7fa0554 | 1943 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 1944 | |
1da177e4 LT |
1945 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
1946 | if (IS_ERR(p)) | |
1947 | goto out_err; | |
1948 | server->hostname = p; | |
1949 | ||
1950 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); | |
1951 | if (IS_ERR(p)) | |
1952 | goto out_err; | |
1953 | server->mnt_path = p; | |
1954 | ||
1955 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, | |
1956 | sizeof(server->ip_addr) - 1); | |
1957 | if (IS_ERR(p)) | |
1958 | goto out_err; | |
1959 | ||
1960 | /* We now require that the mount process passes the remote address */ | |
1961 | if (data->host_addrlen != sizeof(server->addr)) { | |
1962 | s = ERR_PTR(-EINVAL); | |
1963 | goto out_free; | |
1964 | } | |
1965 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { | |
1966 | s = ERR_PTR(-EFAULT); | |
1967 | goto out_free; | |
1968 | } | |
1969 | if (server->addr.sin_family != AF_INET || | |
1970 | server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
1971 | dprintk("%s: mount program didn't pass remote IP address!\n", |
1972 | __FUNCTION__); | |
1da177e4 LT |
1973 | s = ERR_PTR(-EINVAL); |
1974 | goto out_free; | |
1975 | } | |
1976 | ||
9085bbcb TM |
1977 | /* Fire up rpciod if not yet running */ |
1978 | s = ERR_PTR(rpciod_up()); | |
1979 | if (IS_ERR(s)) { | |
1980 | dprintk("%s: couldn't start rpciod! Error = %ld\n", | |
1981 | __FUNCTION__, PTR_ERR(s)); | |
1982 | goto out_free; | |
1983 | } | |
1984 | ||
1da177e4 LT |
1985 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
1986 | ||
1987 | if (IS_ERR(s) || s->s_root) | |
1988 | goto out_free; | |
1989 | ||
1990 | s->s_flags = flags; | |
1991 | ||
1da177e4 LT |
1992 | error = nfs4_fill_super(s, data, flags & MS_VERBOSE ? 1 : 0); |
1993 | if (error) { | |
1994 | up_write(&s->s_umount); | |
1995 | deactivate_super(s); | |
1996 | return ERR_PTR(error); | |
1997 | } | |
1998 | s->s_flags |= MS_ACTIVE; | |
1999 | return s; | |
2000 | out_err: | |
2001 | s = (struct super_block *)p; | |
2002 | out_free: | |
f99d49ad JJ |
2003 | kfree(server->mnt_path); |
2004 | kfree(server->hostname); | |
1da177e4 LT |
2005 | kfree(server); |
2006 | return s; | |
2007 | } | |
2008 | ||
2009 | static void nfs4_kill_super(struct super_block *sb) | |
2010 | { | |
2011 | struct nfs_server *server = NFS_SB(sb); | |
2012 | ||
2013 | nfs_return_all_delegations(sb); | |
2014 | kill_anon_super(sb); | |
2015 | ||
2016 | nfs4_renewd_prepare_shutdown(server); | |
2017 | ||
2018 | if (server->client != NULL && !IS_ERR(server->client)) | |
2019 | rpc_shutdown_client(server->client); | |
2020 | rpciod_down(); /* release rpciod */ | |
2021 | ||
2022 | destroy_nfsv4_state(server); | |
2023 | ||
f99d49ad | 2024 | kfree(server->hostname); |
1da177e4 LT |
2025 | kfree(server); |
2026 | } | |
2027 | ||
2028 | static struct file_system_type nfs4_fs_type = { | |
2029 | .owner = THIS_MODULE, | |
2030 | .name = "nfs4", | |
2031 | .get_sb = nfs4_get_sb, | |
2032 | .kill_sb = nfs4_kill_super, | |
2033 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
2034 | }; | |
2035 | ||
2036 | #define nfs4_init_once(nfsi) \ | |
2037 | do { \ | |
2038 | INIT_LIST_HEAD(&(nfsi)->open_states); \ | |
2039 | nfsi->delegation = NULL; \ | |
2040 | nfsi->delegation_state = 0; \ | |
2041 | init_rwsem(&nfsi->rwsem); \ | |
2042 | } while(0) | |
2043 | #define register_nfs4fs() register_filesystem(&nfs4_fs_type) | |
2044 | #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type) | |
2045 | #else | |
2046 | #define nfs4_init_once(nfsi) \ | |
2047 | do { } while (0) | |
2048 | #define register_nfs4fs() (0) | |
2049 | #define unregister_nfs4fs() | |
2050 | #endif | |
2051 | ||
2052 | extern int nfs_init_nfspagecache(void); | |
2053 | extern void nfs_destroy_nfspagecache(void); | |
2054 | extern int nfs_init_readpagecache(void); | |
2055 | extern void nfs_destroy_readpagecache(void); | |
2056 | extern int nfs_init_writepagecache(void); | |
2057 | extern void nfs_destroy_writepagecache(void); | |
2058 | #ifdef CONFIG_NFS_DIRECTIO | |
2059 | extern int nfs_init_directcache(void); | |
2060 | extern void nfs_destroy_directcache(void); | |
2061 | #endif | |
2062 | ||
2063 | static kmem_cache_t * nfs_inode_cachep; | |
2064 | ||
2065 | static struct inode *nfs_alloc_inode(struct super_block *sb) | |
2066 | { | |
2067 | struct nfs_inode *nfsi; | |
2068 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); | |
2069 | if (!nfsi) | |
2070 | return NULL; | |
55296809 CL |
2071 | nfsi->flags = 0UL; |
2072 | nfsi->cache_validity = 0UL; | |
223db122 | 2073 | nfsi->cache_change_attribute = jiffies; |
458818ed TM |
2074 | #ifdef CONFIG_NFS_V3_ACL |
2075 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
2076 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
2077 | #endif | |
e50a1c2e BF |
2078 | #ifdef CONFIG_NFS_V4 |
2079 | nfsi->nfs4_acl = NULL; | |
2080 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2081 | return &nfsi->vfs_inode; |
2082 | } | |
2083 | ||
2084 | static void nfs_destroy_inode(struct inode *inode) | |
2085 | { | |
2086 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2087 | } | |
2088 | ||
2089 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
2090 | { | |
2091 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2092 | ||
2093 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
2094 | SLAB_CTOR_CONSTRUCTOR) { | |
2095 | inode_init_once(&nfsi->vfs_inode); | |
2096 | spin_lock_init(&nfsi->req_lock); | |
2097 | INIT_LIST_HEAD(&nfsi->dirty); | |
2098 | INIT_LIST_HEAD(&nfsi->commit); | |
2099 | INIT_LIST_HEAD(&nfsi->open_files); | |
2100 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
2101 | atomic_set(&nfsi->data_updates, 0); | |
2102 | nfsi->ndirty = 0; | |
2103 | nfsi->ncommit = 0; | |
2104 | nfsi->npages = 0; | |
1da177e4 LT |
2105 | nfs4_init_once(nfsi); |
2106 | } | |
2107 | } | |
2108 | ||
75c96f85 | 2109 | static int nfs_init_inodecache(void) |
1da177e4 LT |
2110 | { |
2111 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2112 | sizeof(struct nfs_inode), | |
2113 | 0, SLAB_RECLAIM_ACCOUNT, | |
2114 | init_once, NULL); | |
2115 | if (nfs_inode_cachep == NULL) | |
2116 | return -ENOMEM; | |
2117 | ||
2118 | return 0; | |
2119 | } | |
2120 | ||
75c96f85 | 2121 | static void nfs_destroy_inodecache(void) |
1da177e4 LT |
2122 | { |
2123 | if (kmem_cache_destroy(nfs_inode_cachep)) | |
2124 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); | |
2125 | } | |
2126 | ||
2127 | /* | |
2128 | * Initialize NFS | |
2129 | */ | |
2130 | static int __init init_nfs_fs(void) | |
2131 | { | |
2132 | int err; | |
2133 | ||
2134 | err = nfs_init_nfspagecache(); | |
2135 | if (err) | |
2136 | goto out4; | |
2137 | ||
2138 | err = nfs_init_inodecache(); | |
2139 | if (err) | |
2140 | goto out3; | |
2141 | ||
2142 | err = nfs_init_readpagecache(); | |
2143 | if (err) | |
2144 | goto out2; | |
2145 | ||
2146 | err = nfs_init_writepagecache(); | |
2147 | if (err) | |
2148 | goto out1; | |
2149 | ||
2150 | #ifdef CONFIG_NFS_DIRECTIO | |
2151 | err = nfs_init_directcache(); | |
2152 | if (err) | |
2153 | goto out0; | |
2154 | #endif | |
2155 | ||
2156 | #ifdef CONFIG_PROC_FS | |
2157 | rpc_proc_register(&nfs_rpcstat); | |
2158 | #endif | |
2159 | err = register_filesystem(&nfs_fs_type); | |
2160 | if (err) | |
2161 | goto out; | |
2162 | if ((err = register_nfs4fs()) != 0) | |
2163 | goto out; | |
2164 | return 0; | |
2165 | out: | |
2166 | #ifdef CONFIG_PROC_FS | |
2167 | rpc_proc_unregister("nfs"); | |
2168 | #endif | |
2169 | nfs_destroy_writepagecache(); | |
2170 | #ifdef CONFIG_NFS_DIRECTIO | |
2171 | out0: | |
2172 | nfs_destroy_directcache(); | |
2173 | #endif | |
2174 | out1: | |
2175 | nfs_destroy_readpagecache(); | |
2176 | out2: | |
2177 | nfs_destroy_inodecache(); | |
2178 | out3: | |
2179 | nfs_destroy_nfspagecache(); | |
2180 | out4: | |
2181 | return err; | |
2182 | } | |
2183 | ||
2184 | static void __exit exit_nfs_fs(void) | |
2185 | { | |
2186 | #ifdef CONFIG_NFS_DIRECTIO | |
2187 | nfs_destroy_directcache(); | |
2188 | #endif | |
2189 | nfs_destroy_writepagecache(); | |
2190 | nfs_destroy_readpagecache(); | |
2191 | nfs_destroy_inodecache(); | |
2192 | nfs_destroy_nfspagecache(); | |
2193 | #ifdef CONFIG_PROC_FS | |
2194 | rpc_proc_unregister("nfs"); | |
2195 | #endif | |
2196 | unregister_filesystem(&nfs_fs_type); | |
2197 | unregister_nfs4fs(); | |
2198 | } | |
2199 | ||
2200 | /* Not quite true; I just maintain it */ | |
2201 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2202 | MODULE_LICENSE("GPL"); | |
2203 | ||
2204 | module_init(init_nfs_fs) | |
2205 | module_exit(exit_nfs_fs) |