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> | |
4ece3a2d | 29 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
30 | #include <linux/nfs_fs.h> |
31 | #include <linux/nfs_mount.h> | |
32 | #include <linux/nfs4_mount.h> | |
33 | #include <linux/lockd/bind.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/seq_file.h> | |
36 | #include <linux/mount.h> | |
37 | #include <linux/nfs_idmap.h> | |
38 | #include <linux/vfs.h> | |
39 | ||
40 | #include <asm/system.h> | |
41 | #include <asm/uaccess.h> | |
42 | ||
4ce79717 | 43 | #include "nfs4_fs.h" |
a72b4422 | 44 | #include "callback.h" |
1da177e4 | 45 | #include "delegation.h" |
d9ef5a8c | 46 | #include "iostat.h" |
1da177e4 LT |
47 | |
48 | #define NFSDBG_FACILITY NFSDBG_VFS | |
49 | #define NFS_PARANOIA 1 | |
50 | ||
51 | /* Maximum number of readahead requests | |
52 | * FIXME: this should really be a sysctl so that users may tune it to suit | |
53 | * their needs. People that do NFS over a slow network, might for | |
54 | * instance want to reduce it to something closer to 1 for improved | |
55 | * interactive response. | |
56 | */ | |
57 | #define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1) | |
58 | ||
59 | static void nfs_invalidate_inode(struct inode *); | |
24aa1fe6 | 60 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 LT |
61 | |
62 | static struct inode *nfs_alloc_inode(struct super_block *sb); | |
63 | static void nfs_destroy_inode(struct inode *); | |
64 | static int nfs_write_inode(struct inode *,int); | |
1da177e4 | 65 | static void nfs_clear_inode(struct inode *); |
8b512d9a | 66 | static void nfs_umount_begin(struct vfsmount *, int); |
1da177e4 LT |
67 | static int nfs_statfs(struct super_block *, struct kstatfs *); |
68 | static int nfs_show_options(struct seq_file *, struct vfsmount *); | |
d9ef5a8c | 69 | static int nfs_show_stats(struct seq_file *, struct vfsmount *); |
ada70d94 | 70 | static void nfs_zap_acl_cache(struct inode *); |
1da177e4 LT |
71 | |
72 | static struct rpc_program nfs_program; | |
73 | ||
74 | static struct super_operations nfs_sops = { | |
75 | .alloc_inode = nfs_alloc_inode, | |
76 | .destroy_inode = nfs_destroy_inode, | |
77 | .write_inode = nfs_write_inode, | |
1da177e4 LT |
78 | .statfs = nfs_statfs, |
79 | .clear_inode = nfs_clear_inode, | |
80 | .umount_begin = nfs_umount_begin, | |
81 | .show_options = nfs_show_options, | |
d9ef5a8c | 82 | .show_stats = nfs_show_stats, |
1da177e4 LT |
83 | }; |
84 | ||
85 | /* | |
86 | * RPC cruft for NFS | |
87 | */ | |
88 | static struct rpc_stat nfs_rpcstat = { | |
89 | .program = &nfs_program | |
90 | }; | |
91 | static struct rpc_version * nfs_version[] = { | |
92 | NULL, | |
93 | NULL, | |
94 | &nfs_version2, | |
95 | #if defined(CONFIG_NFS_V3) | |
96 | &nfs_version3, | |
97 | #elif defined(CONFIG_NFS_V4) | |
98 | NULL, | |
99 | #endif | |
100 | #if defined(CONFIG_NFS_V4) | |
101 | &nfs_version4, | |
102 | #endif | |
103 | }; | |
104 | ||
105 | static struct rpc_program nfs_program = { | |
106 | .name = "nfs", | |
107 | .number = NFS_PROGRAM, | |
e8c96f8c | 108 | .nrvers = ARRAY_SIZE(nfs_version), |
1da177e4 LT |
109 | .version = nfs_version, |
110 | .stats = &nfs_rpcstat, | |
111 | .pipe_dir_name = "/nfs", | |
112 | }; | |
113 | ||
b7fa0554 AG |
114 | #ifdef CONFIG_NFS_V3_ACL |
115 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; | |
116 | static struct rpc_version * nfsacl_version[] = { | |
117 | [3] = &nfsacl_version3, | |
118 | }; | |
119 | ||
120 | struct rpc_program nfsacl_program = { | |
121 | .name = "nfsacl", | |
122 | .number = NFS_ACL_PROGRAM, | |
e8c96f8c | 123 | .nrvers = ARRAY_SIZE(nfsacl_version), |
b7fa0554 AG |
124 | .version = nfsacl_version, |
125 | .stats = &nfsacl_rpcstat, | |
126 | }; | |
127 | #endif /* CONFIG_NFS_V3_ACL */ | |
128 | ||
1da177e4 LT |
129 | static inline unsigned long |
130 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
131 | { | |
132 | return nfs_fileid_to_ino_t(fattr->fileid); | |
133 | } | |
134 | ||
135 | static int | |
136 | nfs_write_inode(struct inode *inode, int sync) | |
137 | { | |
c42de9dd | 138 | int flags = sync ? FLUSH_SYNC : 0; |
1da177e4 LT |
139 | int ret; |
140 | ||
3da28eb1 | 141 | ret = nfs_commit_inode(inode, flags); |
1da177e4 LT |
142 | if (ret < 0) |
143 | return ret; | |
144 | return 0; | |
145 | } | |
146 | ||
1da177e4 LT |
147 | static void |
148 | nfs_clear_inode(struct inode *inode) | |
149 | { | |
150 | struct nfs_inode *nfsi = NFS_I(inode); | |
151 | struct rpc_cred *cred; | |
152 | ||
da6d503a TM |
153 | /* |
154 | * The following should never happen... | |
155 | */ | |
156 | BUG_ON(nfs_have_writebacks(inode)); | |
1da177e4 | 157 | BUG_ON (!list_empty(&nfsi->open_files)); |
ada70d94 | 158 | nfs_zap_acl_cache(inode); |
1da177e4 LT |
159 | cred = nfsi->cache_access.cred; |
160 | if (cred) | |
161 | put_rpccred(cred); | |
162 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); | |
163 | } | |
164 | ||
8b512d9a | 165 | static void nfs_umount_begin(struct vfsmount *vfsmnt, int flags) |
1da177e4 | 166 | { |
8b512d9a TM |
167 | struct nfs_server *server; |
168 | struct rpc_clnt *rpc; | |
1da177e4 | 169 | |
51d8fa6a | 170 | shrink_submounts(vfsmnt, &nfs_automount_list); |
8b512d9a TM |
171 | if (!(flags & MNT_FORCE)) |
172 | return; | |
1da177e4 | 173 | /* -EIO all pending I/O */ |
8b512d9a TM |
174 | server = NFS_SB(vfsmnt->mnt_sb); |
175 | rpc = server->client; | |
6a19275a | 176 | if (!IS_ERR(rpc)) |
1da177e4 | 177 | rpc_killall_tasks(rpc); |
8b512d9a | 178 | rpc = server->client_acl; |
b7fa0554 AG |
179 | if (!IS_ERR(rpc)) |
180 | rpc_killall_tasks(rpc); | |
1da177e4 LT |
181 | } |
182 | ||
183 | ||
184 | static inline unsigned long | |
185 | nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp) | |
186 | { | |
187 | /* make sure blocksize is a power of two */ | |
188 | if ((bsize & (bsize - 1)) || nrbitsp) { | |
189 | unsigned char nrbits; | |
190 | ||
191 | for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--) | |
192 | ; | |
193 | bsize = 1 << nrbits; | |
194 | if (nrbitsp) | |
195 | *nrbitsp = nrbits; | |
196 | } | |
197 | ||
198 | return bsize; | |
199 | } | |
200 | ||
201 | /* | |
202 | * Calculate the number of 512byte blocks used. | |
203 | */ | |
204 | static inline unsigned long | |
205 | nfs_calc_block_size(u64 tsize) | |
206 | { | |
207 | loff_t used = (tsize + 511) >> 9; | |
208 | return (used > ULONG_MAX) ? ULONG_MAX : used; | |
209 | } | |
210 | ||
211 | /* | |
212 | * Compute and set NFS server blocksize | |
213 | */ | |
214 | static inline unsigned long | |
215 | nfs_block_size(unsigned long bsize, unsigned char *nrbitsp) | |
216 | { | |
40859d7e CL |
217 | if (bsize < NFS_MIN_FILE_IO_SIZE) |
218 | bsize = NFS_DEF_FILE_IO_SIZE; | |
219 | else if (bsize >= NFS_MAX_FILE_IO_SIZE) | |
220 | bsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 LT |
221 | |
222 | return nfs_block_bits(bsize, nrbitsp); | |
223 | } | |
224 | ||
55a97593 TM |
225 | static inline void |
226 | nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize) | |
227 | { | |
228 | sb->s_maxbytes = (loff_t)maxfilesize; | |
229 | if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0) | |
230 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
231 | } | |
232 | ||
1da177e4 LT |
233 | /* |
234 | * Obtain the root inode of the file system. | |
235 | */ | |
236 | static struct inode * | |
237 | nfs_get_root(struct super_block *sb, struct nfs_fh *rootfh, struct nfs_fsinfo *fsinfo) | |
238 | { | |
239 | struct nfs_server *server = NFS_SB(sb); | |
1da177e4 LT |
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 | ||
8b4bdcf8 | 248 | server->fsid = fsinfo->fattr->fsid; |
03f28e3a | 249 | return nfs_fhget(sb, rootfh, fsinfo->fattr); |
1da177e4 LT |
250 | } |
251 | ||
252 | /* | |
253 | * Do NFS version-independent mount processing, and sanity checking | |
254 | */ | |
255 | static int | |
256 | nfs_sb_init(struct super_block *sb, rpc_authflavor_t authflavor) | |
257 | { | |
258 | struct nfs_server *server; | |
259 | struct inode *root_inode; | |
260 | struct nfs_fattr fattr; | |
261 | struct nfs_fsinfo fsinfo = { | |
262 | .fattr = &fattr, | |
263 | }; | |
264 | struct nfs_pathconf pathinfo = { | |
265 | .fattr = &fattr, | |
266 | }; | |
267 | int no_root_error = 0; | |
268 | unsigned long max_rpc_payload; | |
269 | ||
270 | /* We probably want something more informative here */ | |
271 | snprintf(sb->s_id, sizeof(sb->s_id), "%x:%x", MAJOR(sb->s_dev), MINOR(sb->s_dev)); | |
272 | ||
273 | server = NFS_SB(sb); | |
274 | ||
275 | sb->s_magic = NFS_SUPER_MAGIC; | |
276 | ||
01d0ae8b TM |
277 | server->io_stats = nfs_alloc_iostats(); |
278 | if (server->io_stats == NULL) | |
279 | return -ENOMEM; | |
280 | ||
1da177e4 LT |
281 | root_inode = nfs_get_root(sb, &server->fh, &fsinfo); |
282 | /* Did getting the root inode fail? */ | |
283 | if (IS_ERR(root_inode)) { | |
284 | no_root_error = PTR_ERR(root_inode); | |
285 | goto out_no_root; | |
286 | } | |
287 | sb->s_root = d_alloc_root(root_inode); | |
288 | if (!sb->s_root) { | |
289 | no_root_error = -ENOMEM; | |
290 | goto out_no_root; | |
291 | } | |
292 | sb->s_root->d_op = server->rpc_ops->dentry_ops; | |
293 | ||
67ec9f46 CL |
294 | /* mount time stamp, in seconds */ |
295 | server->mount_time = jiffies; | |
296 | ||
1da177e4 LT |
297 | /* Get some general file system info */ |
298 | if (server->namelen == 0 && | |
299 | server->rpc_ops->pathconf(server, &server->fh, &pathinfo) >= 0) | |
300 | server->namelen = pathinfo.max_namelen; | |
301 | /* Work out a lot of parameters */ | |
302 | if (server->rsize == 0) | |
303 | server->rsize = nfs_block_size(fsinfo.rtpref, NULL); | |
304 | if (server->wsize == 0) | |
305 | server->wsize = nfs_block_size(fsinfo.wtpref, NULL); | |
306 | ||
307 | if (fsinfo.rtmax >= 512 && server->rsize > fsinfo.rtmax) | |
308 | server->rsize = nfs_block_size(fsinfo.rtmax, NULL); | |
309 | if (fsinfo.wtmax >= 512 && server->wsize > fsinfo.wtmax) | |
310 | server->wsize = nfs_block_size(fsinfo.wtmax, NULL); | |
311 | ||
312 | max_rpc_payload = nfs_block_size(rpc_max_payload(server->client), NULL); | |
313 | if (server->rsize > max_rpc_payload) | |
314 | server->rsize = max_rpc_payload; | |
40859d7e CL |
315 | if (server->rsize > NFS_MAX_FILE_IO_SIZE) |
316 | server->rsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 | 317 | server->rpages = (server->rsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
1da177e4 | 318 | |
40859d7e CL |
319 | if (server->wsize > max_rpc_payload) |
320 | server->wsize = max_rpc_payload; | |
321 | if (server->wsize > NFS_MAX_FILE_IO_SIZE) | |
322 | server->wsize = NFS_MAX_FILE_IO_SIZE; | |
1da177e4 | 323 | server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
1da177e4 LT |
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 | ||
55a97593 | 343 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); |
1da177e4 LT |
344 | |
345 | server->client->cl_intr = (server->flags & NFS_MOUNT_INTR) ? 1 : 0; | |
346 | server->client->cl_softrtry = (server->flags & NFS_MOUNT_SOFT) ? 1 : 0; | |
347 | ||
348 | /* We're airborne Set socket buffersize */ | |
349 | rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100); | |
350 | return 0; | |
351 | /* Yargs. It didn't work out. */ | |
352 | out_no_root: | |
353 | dprintk("nfs_sb_init: get root inode failed: errno %d\n", -no_root_error); | |
354 | if (!IS_ERR(root_inode)) | |
355 | iput(root_inode); | |
356 | return no_root_error; | |
357 | } | |
358 | ||
eab5c084 CL |
359 | static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans) |
360 | { | |
361 | to->to_initval = timeo * HZ / 10; | |
362 | to->to_retries = retrans; | |
363 | if (!to->to_retries) | |
364 | to->to_retries = 2; | |
365 | ||
366 | switch (proto) { | |
367 | case IPPROTO_TCP: | |
368 | if (!to->to_initval) | |
369 | to->to_initval = 60 * HZ; | |
03bf4b70 CL |
370 | if (to->to_initval > NFS_MAX_TCP_TIMEOUT) |
371 | to->to_initval = NFS_MAX_TCP_TIMEOUT; | |
eab5c084 CL |
372 | to->to_increment = to->to_initval; |
373 | to->to_maxval = to->to_initval + (to->to_increment * to->to_retries); | |
374 | to->to_exponential = 0; | |
375 | break; | |
376 | case IPPROTO_UDP: | |
377 | default: | |
378 | if (!to->to_initval) | |
379 | to->to_initval = 11 * HZ / 10; | |
03bf4b70 CL |
380 | if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
381 | to->to_initval = NFS_MAX_UDP_TIMEOUT; | |
382 | to->to_maxval = NFS_MAX_UDP_TIMEOUT; | |
eab5c084 CL |
383 | to->to_exponential = 1; |
384 | break; | |
385 | } | |
386 | } | |
387 | ||
1da177e4 LT |
388 | /* |
389 | * Create an RPC client handle. | |
390 | */ | |
391 | static struct rpc_clnt * | |
392 | nfs_create_client(struct nfs_server *server, const struct nfs_mount_data *data) | |
393 | { | |
394 | struct rpc_timeout timeparms; | |
395 | struct rpc_xprt *xprt = NULL; | |
396 | struct rpc_clnt *clnt = NULL; | |
eab5c084 | 397 | int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP; |
1da177e4 | 398 | |
eab5c084 | 399 | nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans); |
1da177e4 | 400 | |
7a480e25 CL |
401 | server->retrans_timeo = timeparms.to_initval; |
402 | server->retrans_count = timeparms.to_retries; | |
403 | ||
1da177e4 | 404 | /* create transport and client */ |
eab5c084 | 405 | xprt = xprt_create_proto(proto, &server->addr, &timeparms); |
1da177e4 | 406 | if (IS_ERR(xprt)) { |
9085bbcb TM |
407 | dprintk("%s: cannot create RPC transport. Error = %ld\n", |
408 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
409 | return (struct rpc_clnt *)xprt; |
410 | } | |
411 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
412 | server->rpc_ops->version, data->pseudoflavor); | |
413 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
414 | dprintk("%s: cannot create RPC client. Error = %ld\n", |
415 | __FUNCTION__, PTR_ERR(xprt)); | |
1da177e4 LT |
416 | goto out_fail; |
417 | } | |
418 | ||
419 | clnt->cl_intr = 1; | |
420 | clnt->cl_softrtry = 1; | |
1da177e4 LT |
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(); | |
1da177e4 LT |
578 | return 0; |
579 | ||
580 | out_err: | |
dc20f803 | 581 | dprintk("%s: statfs error = %d\n", __FUNCTION__, -error); |
1da177e4 LT |
582 | buf->f_bsize = buf->f_blocks = buf->f_bfree = buf->f_bavail = -1; |
583 | goto out; | |
584 | ||
585 | } | |
586 | ||
d9ef5a8c | 587 | static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, int showdefaults) |
1da177e4 LT |
588 | { |
589 | static struct proc_nfs_info { | |
590 | int flag; | |
591 | char *str; | |
592 | char *nostr; | |
593 | } nfs_info[] = { | |
594 | { NFS_MOUNT_SOFT, ",soft", ",hard" }, | |
595 | { NFS_MOUNT_INTR, ",intr", "" }, | |
1da177e4 LT |
596 | { NFS_MOUNT_NOCTO, ",nocto", "" }, |
597 | { NFS_MOUNT_NOAC, ",noac", "" }, | |
c8bded96 | 598 | { NFS_MOUNT_NONLM, ",nolock", "" }, |
b7fa0554 | 599 | { NFS_MOUNT_NOACL, ",noacl", "" }, |
1da177e4 LT |
600 | { 0, NULL, NULL } |
601 | }; | |
602 | struct proc_nfs_info *nfs_infop; | |
3063d8a1 TM |
603 | char buf[12]; |
604 | char *proto; | |
1da177e4 | 605 | |
c8bded96 | 606 | seq_printf(m, ",vers=%d", nfss->rpc_ops->version); |
1da177e4 LT |
607 | seq_printf(m, ",rsize=%d", nfss->rsize); |
608 | seq_printf(m, ",wsize=%d", nfss->wsize); | |
d9ef5a8c | 609 | if (nfss->acregmin != 3*HZ || showdefaults) |
1da177e4 | 610 | seq_printf(m, ",acregmin=%d", nfss->acregmin/HZ); |
d9ef5a8c | 611 | if (nfss->acregmax != 60*HZ || showdefaults) |
1da177e4 | 612 | seq_printf(m, ",acregmax=%d", nfss->acregmax/HZ); |
d9ef5a8c | 613 | if (nfss->acdirmin != 30*HZ || showdefaults) |
1da177e4 | 614 | seq_printf(m, ",acdirmin=%d", nfss->acdirmin/HZ); |
d9ef5a8c | 615 | if (nfss->acdirmax != 60*HZ || showdefaults) |
1da177e4 LT |
616 | seq_printf(m, ",acdirmax=%d", nfss->acdirmax/HZ); |
617 | for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) { | |
618 | if (nfss->flags & nfs_infop->flag) | |
619 | seq_puts(m, nfs_infop->str); | |
620 | else | |
621 | seq_puts(m, nfs_infop->nostr); | |
622 | } | |
3063d8a1 TM |
623 | switch (nfss->client->cl_xprt->prot) { |
624 | case IPPROTO_TCP: | |
625 | proto = "tcp"; | |
626 | break; | |
627 | case IPPROTO_UDP: | |
628 | proto = "udp"; | |
629 | break; | |
630 | default: | |
631 | snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot); | |
632 | proto = buf; | |
633 | } | |
634 | seq_printf(m, ",proto=%s", proto); | |
7a480e25 CL |
635 | seq_printf(m, ",timeo=%lu", 10U * nfss->retrans_timeo / HZ); |
636 | seq_printf(m, ",retrans=%u", nfss->retrans_count); | |
d9ef5a8c CL |
637 | } |
638 | ||
639 | static int nfs_show_options(struct seq_file *m, struct vfsmount *mnt) | |
640 | { | |
641 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
642 | ||
643 | nfs_show_mount_options(m, nfss, 0); | |
644 | ||
1da177e4 LT |
645 | seq_puts(m, ",addr="); |
646 | seq_escape(m, nfss->hostname, " \t\n\\"); | |
d9ef5a8c CL |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static int nfs_show_stats(struct seq_file *m, struct vfsmount *mnt) | |
652 | { | |
653 | int i, cpu; | |
654 | struct nfs_server *nfss = NFS_SB(mnt->mnt_sb); | |
655 | struct rpc_auth *auth = nfss->client->cl_auth; | |
656 | struct nfs_iostats totals = { }; | |
657 | ||
658 | seq_printf(m, "statvers=%s", NFS_IOSTAT_VERS); | |
659 | ||
660 | /* | |
661 | * Display all mount option settings | |
662 | */ | |
663 | seq_printf(m, "\n\topts:\t"); | |
664 | seq_puts(m, mnt->mnt_sb->s_flags & MS_RDONLY ? "ro" : "rw"); | |
665 | seq_puts(m, mnt->mnt_sb->s_flags & MS_SYNCHRONOUS ? ",sync" : ""); | |
666 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NOATIME ? ",noatime" : ""); | |
667 | seq_puts(m, mnt->mnt_sb->s_flags & MS_NODIRATIME ? ",nodiratime" : ""); | |
668 | nfs_show_mount_options(m, nfss, 1); | |
669 | ||
67ec9f46 CL |
670 | seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ); |
671 | ||
d9ef5a8c CL |
672 | seq_printf(m, "\n\tcaps:\t"); |
673 | seq_printf(m, "caps=0x%x", nfss->caps); | |
674 | seq_printf(m, ",wtmult=%d", nfss->wtmult); | |
675 | seq_printf(m, ",dtsize=%d", nfss->dtsize); | |
676 | seq_printf(m, ",bsize=%d", nfss->bsize); | |
677 | seq_printf(m, ",namelen=%d", nfss->namelen); | |
678 | ||
679 | #ifdef CONFIG_NFS_V4 | |
680 | if (nfss->rpc_ops->version == 4) { | |
681 | seq_printf(m, "\n\tnfsv4:\t"); | |
682 | seq_printf(m, "bm0=0x%x", nfss->attr_bitmask[0]); | |
683 | seq_printf(m, ",bm1=0x%x", nfss->attr_bitmask[1]); | |
684 | seq_printf(m, ",acl=0x%x", nfss->acl_bitmask); | |
685 | } | |
686 | #endif | |
687 | ||
688 | /* | |
689 | * Display security flavor in effect for this mount | |
690 | */ | |
691 | seq_printf(m, "\n\tsec:\tflavor=%d", auth->au_ops->au_flavor); | |
692 | if (auth->au_flavor) | |
693 | seq_printf(m, ",pseudoflavor=%d", auth->au_flavor); | |
694 | ||
695 | /* | |
696 | * Display superblock I/O counters | |
697 | */ | |
b9d9506d | 698 | for_each_possible_cpu(cpu) { |
d9ef5a8c CL |
699 | struct nfs_iostats *stats; |
700 | ||
d9ef5a8c CL |
701 | preempt_disable(); |
702 | stats = per_cpu_ptr(nfss->io_stats, cpu); | |
703 | ||
704 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
705 | totals.events[i] += stats->events[i]; | |
706 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
707 | totals.bytes[i] += stats->bytes[i]; | |
708 | ||
709 | preempt_enable(); | |
710 | } | |
711 | ||
712 | seq_printf(m, "\n\tevents:\t"); | |
713 | for (i = 0; i < __NFSIOS_COUNTSMAX; i++) | |
714 | seq_printf(m, "%lu ", totals.events[i]); | |
715 | seq_printf(m, "\n\tbytes:\t"); | |
716 | for (i = 0; i < __NFSIOS_BYTESMAX; i++) | |
717 | seq_printf(m, "%Lu ", totals.bytes[i]); | |
4ece3a2d CL |
718 | seq_printf(m, "\n"); |
719 | ||
720 | rpc_print_iostats(m, nfss->client); | |
d9ef5a8c | 721 | |
1da177e4 LT |
722 | return 0; |
723 | } | |
724 | ||
29884df0 TM |
725 | /** |
726 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
727 | */ | |
728 | int nfs_sync_mapping(struct address_space *mapping) | |
729 | { | |
730 | int ret; | |
731 | ||
732 | if (mapping->nrpages == 0) | |
733 | return 0; | |
734 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 735 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
736 | if (ret != 0) |
737 | goto out; | |
738 | ret = nfs_wb_all(mapping->host); | |
739 | out: | |
740 | return ret; | |
741 | } | |
742 | ||
1da177e4 LT |
743 | /* |
744 | * Invalidate the local caches | |
745 | */ | |
b37b03b7 | 746 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
747 | { |
748 | struct nfs_inode *nfsi = NFS_I(inode); | |
749 | int mode = inode->i_mode; | |
750 | ||
91d5b470 CL |
751 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
752 | ||
1da177e4 LT |
753 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
754 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; | |
755 | ||
756 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
757 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 758 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 759 | else |
55296809 | 760 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 761 | } |
dc59250c | 762 | |
b37b03b7 TM |
763 | void nfs_zap_caches(struct inode *inode) |
764 | { | |
765 | spin_lock(&inode->i_lock); | |
766 | nfs_zap_caches_locked(inode); | |
dc59250c | 767 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
768 | } |
769 | ||
770 | static void nfs_zap_acl_cache(struct inode *inode) | |
771 | { | |
772 | void (*clear_acl_cache)(struct inode *); | |
773 | ||
774 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
775 | if (clear_acl_cache != NULL) | |
776 | clear_acl_cache(inode); | |
dc59250c | 777 | spin_lock(&inode->i_lock); |
55296809 | 778 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 779 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
780 | } |
781 | ||
782 | /* | |
b37b03b7 TM |
783 | * Invalidate, but do not unhash, the inode. |
784 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 785 | */ |
b37b03b7 | 786 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 787 | { |
b37b03b7 TM |
788 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
789 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
790 | } |
791 | ||
792 | struct nfs_find_desc { | |
793 | struct nfs_fh *fh; | |
794 | struct nfs_fattr *fattr; | |
795 | }; | |
796 | ||
797 | /* | |
798 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
799 | * this, and re-exported directories (also seen in NFSv2) | |
800 | * we are forced to allow 2 different inodes to have the same | |
801 | * i_ino. | |
802 | */ | |
803 | static int | |
804 | nfs_find_actor(struct inode *inode, void *opaque) | |
805 | { | |
806 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
807 | struct nfs_fh *fh = desc->fh; | |
808 | struct nfs_fattr *fattr = desc->fattr; | |
809 | ||
810 | if (NFS_FILEID(inode) != fattr->fileid) | |
811 | return 0; | |
812 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
813 | return 0; | |
814 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
815 | return 0; | |
816 | return 1; | |
817 | } | |
818 | ||
819 | static int | |
820 | nfs_init_locked(struct inode *inode, void *opaque) | |
821 | { | |
822 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
823 | struct nfs_fattr *fattr = desc->fattr; | |
824 | ||
825 | NFS_FILEID(inode) = fattr->fileid; | |
826 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
827 | return 0; | |
828 | } | |
829 | ||
830 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
831 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
832 | ||
833 | /* | |
834 | * This is our front-end to iget that looks up inodes by file handle | |
835 | * instead of inode number. | |
836 | */ | |
837 | struct inode * | |
838 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
839 | { | |
840 | struct nfs_find_desc desc = { | |
841 | .fh = fh, | |
842 | .fattr = fattr | |
843 | }; | |
03f28e3a | 844 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
845 | unsigned long hash; |
846 | ||
847 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
848 | goto out_no_inode; | |
849 | ||
850 | if (!fattr->nlink) { | |
851 | printk("NFS: Buggy server - nlink == 0!\n"); | |
852 | goto out_no_inode; | |
853 | } | |
854 | ||
855 | hash = nfs_fattr_to_ino_t(fattr); | |
856 | ||
03f28e3a TM |
857 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
858 | if (inode == NULL) { | |
859 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 860 | goto out_no_inode; |
03f28e3a | 861 | } |
1da177e4 LT |
862 | |
863 | if (inode->i_state & I_NEW) { | |
864 | struct nfs_inode *nfsi = NFS_I(inode); | |
865 | ||
866 | /* We set i_ino for the few things that still rely on it, | |
867 | * such as stat(2) */ | |
868 | inode->i_ino = hash; | |
869 | ||
870 | /* We can't support update_atime(), since the server will reset it */ | |
871 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
872 | inode->i_mode = fattr->mode; | |
873 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
874 | * that's precisely what we have in nfs_file_inode_operations. | |
875 | */ | |
92cfc62c | 876 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
1da177e4 LT |
877 | if (S_ISREG(inode->i_mode)) { |
878 | inode->i_fop = &nfs_file_operations; | |
879 | inode->i_data.a_ops = &nfs_file_aops; | |
880 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
881 | } else if (S_ISDIR(inode->i_mode)) { | |
882 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; | |
883 | inode->i_fop = &nfs_dir_operations; | |
884 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
885 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 886 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
55a97593 TM |
887 | /* Deal with crossing mountpoints */ |
888 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
889 | inode->i_op = &nfs_mountpoint_inode_operations; | |
890 | inode->i_fop = NULL; | |
891 | } | |
1da177e4 LT |
892 | } else if (S_ISLNK(inode->i_mode)) |
893 | inode->i_op = &nfs_symlink_inode_operations; | |
894 | else | |
895 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
896 | ||
33801147 TM |
897 | nfsi->read_cache_jiffies = fattr->time_start; |
898 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
899 | inode->i_atime = fattr->atime; |
900 | inode->i_mtime = fattr->mtime; | |
901 | inode->i_ctime = fattr->ctime; | |
902 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
903 | nfsi->change_attr = fattr->change_attr; | |
904 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
905 | inode->i_nlink = fattr->nlink; | |
906 | inode->i_uid = fattr->uid; | |
907 | inode->i_gid = fattr->gid; | |
908 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
909 | /* | |
910 | * report the blocks in 512byte units | |
911 | */ | |
912 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
913 | inode->i_blksize = inode->i_sb->s_blocksize; | |
914 | } else { | |
915 | inode->i_blocks = fattr->du.nfs2.blocks; | |
916 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
917 | } | |
918 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
919 | nfsi->attrtimeo_timestamp = jiffies; | |
920 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
921 | nfsi->cache_access.cred = NULL; | |
922 | ||
923 | unlock_new_inode(inode); | |
924 | } else | |
925 | nfs_refresh_inode(inode, fattr); | |
926 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
927 | inode->i_sb->s_id, | |
928 | (long long)NFS_FILEID(inode), | |
929 | atomic_read(&inode->i_count)); | |
930 | ||
931 | out: | |
932 | return inode; | |
933 | ||
934 | out_no_inode: | |
03f28e3a | 935 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
936 | goto out; |
937 | } | |
938 | ||
939 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
940 | ||
941 | int | |
942 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
943 | { | |
944 | struct inode *inode = dentry->d_inode; | |
945 | struct nfs_fattr fattr; | |
946 | int error; | |
947 | ||
91d5b470 CL |
948 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
949 | ||
1da177e4 LT |
950 | if (attr->ia_valid & ATTR_SIZE) { |
951 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
952 | attr->ia_valid &= ~ATTR_SIZE; | |
953 | } | |
954 | ||
955 | /* Optimization: if the end result is no change, don't RPC */ | |
956 | attr->ia_valid &= NFS_VALID_ATTRS; | |
957 | if (attr->ia_valid == 0) | |
958 | return 0; | |
959 | ||
960 | lock_kernel(); | |
961 | nfs_begin_data_update(inode); | |
755c1e20 TM |
962 | /* Write all dirty data */ |
963 | filemap_write_and_wait(inode->i_mapping); | |
964 | nfs_wb_all(inode); | |
642ac549 TM |
965 | /* |
966 | * Return any delegations if we're going to change ACLs | |
967 | */ | |
968 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
969 | nfs_inode_return_delegation(inode); | |
1da177e4 | 970 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 971 | if (error == 0) |
1da177e4 | 972 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
973 | nfs_end_data_update(inode); |
974 | unlock_kernel(); | |
975 | return error; | |
976 | } | |
977 | ||
978 | /** | |
979 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
980 | * @inode: pointer to struct inode | |
981 | * @attr: pointer to struct iattr | |
982 | * | |
983 | * Note: we do this in the *proc.c in order to ensure that | |
984 | * it works for things like exclusive creates too. | |
985 | */ | |
986 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
987 | { | |
988 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 989 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
990 | int mode = attr->ia_mode & S_IALLUGO; |
991 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
992 | inode->i_mode = mode; |
993 | } | |
994 | if ((attr->ia_valid & ATTR_UID) != 0) | |
995 | inode->i_uid = attr->ia_uid; | |
996 | if ((attr->ia_valid & ATTR_GID) != 0) | |
997 | inode->i_gid = attr->ia_gid; | |
dc59250c | 998 | spin_lock(&inode->i_lock); |
55296809 | 999 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 1000 | spin_unlock(&inode->i_lock); |
65e4308d TM |
1001 | } |
1002 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 1003 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
65e4308d TM |
1004 | inode->i_size = attr->ia_size; |
1005 | vmtruncate(inode, attr->ia_size); | |
1006 | } | |
1da177e4 LT |
1007 | } |
1008 | ||
412d582e CL |
1009 | static int nfs_wait_schedule(void *word) |
1010 | { | |
1011 | if (signal_pending(current)) | |
1012 | return -ERESTARTSYS; | |
1013 | schedule(); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1da177e4 LT |
1017 | /* |
1018 | * Wait for the inode to get unlocked. | |
1da177e4 | 1019 | */ |
412d582e | 1020 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
1021 | { |
1022 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
1023 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 1024 | sigset_t oldmask; |
1da177e4 | 1025 | int error; |
412d582e | 1026 | |
412d582e CL |
1027 | rpc_clnt_sigmask(clnt, &oldmask); |
1028 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
1029 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
1030 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 1031 | |
1da177e4 LT |
1032 | return error; |
1033 | } | |
1034 | ||
412d582e CL |
1035 | static void nfs_wake_up_inode(struct inode *inode) |
1036 | { | |
1037 | struct nfs_inode *nfsi = NFS_I(inode); | |
1038 | ||
1039 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
1040 | smp_mb__after_clear_bit(); | |
1041 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
1042 | } | |
1043 | ||
1da177e4 LT |
1044 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
1045 | { | |
1046 | struct inode *inode = dentry->d_inode; | |
55296809 | 1047 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
1048 | int err; |
1049 | ||
70b9ecbd | 1050 | /* Flush out writes to the server in order to update c/mtime */ |
c42de9dd | 1051 | nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); |
fc33a7bb CH |
1052 | |
1053 | /* | |
1054 | * We may force a getattr if the user cares about atime. | |
1055 | * | |
1056 | * Note that we only have to check the vfsmount flags here: | |
1057 | * - NFS always sets S_NOATIME by so checking it would give a | |
1058 | * bogus result | |
1059 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
1060 | * no point in checking those. | |
1061 | */ | |
1062 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
1063 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 1064 | need_atime = 0; |
fc33a7bb | 1065 | |
1da177e4 LT |
1066 | if (need_atime) |
1067 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
1068 | else | |
1069 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
1070 | if (!err) | |
1071 | generic_fillattr(inode, stat); | |
1072 | return err; | |
1073 | } | |
1074 | ||
b92dccf6 | 1075 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
1076 | { |
1077 | struct nfs_open_context *ctx; | |
1078 | ||
1079 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); | |
1080 | if (ctx != NULL) { | |
1081 | atomic_set(&ctx->count, 1); | |
1082 | ctx->dentry = dget(dentry); | |
b92dccf6 | 1083 | ctx->vfsmnt = mntget(mnt); |
1da177e4 LT |
1084 | ctx->cred = get_rpccred(cred); |
1085 | ctx->state = NULL; | |
1086 | ctx->lockowner = current->files; | |
1087 | ctx->error = 0; | |
00a92642 | 1088 | ctx->dir_cookie = 0; |
1da177e4 LT |
1089 | } |
1090 | return ctx; | |
1091 | } | |
1092 | ||
1093 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
1094 | { | |
1095 | if (ctx != NULL) | |
1096 | atomic_inc(&ctx->count); | |
1097 | return ctx; | |
1098 | } | |
1099 | ||
1100 | void put_nfs_open_context(struct nfs_open_context *ctx) | |
1101 | { | |
1102 | if (atomic_dec_and_test(&ctx->count)) { | |
1103 | if (!list_empty(&ctx->list)) { | |
1104 | struct inode *inode = ctx->dentry->d_inode; | |
1105 | spin_lock(&inode->i_lock); | |
1106 | list_del(&ctx->list); | |
1107 | spin_unlock(&inode->i_lock); | |
1108 | } | |
1109 | if (ctx->state != NULL) | |
1110 | nfs4_close_state(ctx->state, ctx->mode); | |
1111 | if (ctx->cred != NULL) | |
1112 | put_rpccred(ctx->cred); | |
1113 | dput(ctx->dentry); | |
b92dccf6 | 1114 | mntput(ctx->vfsmnt); |
1da177e4 LT |
1115 | kfree(ctx); |
1116 | } | |
1117 | } | |
1118 | ||
1119 | /* | |
1120 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1121 | * shared pages | |
1122 | */ | |
b92dccf6 | 1123 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 LT |
1124 | { |
1125 | struct inode *inode = filp->f_dentry->d_inode; | |
1126 | struct nfs_inode *nfsi = NFS_I(inode); | |
1127 | ||
1128 | filp->private_data = get_nfs_open_context(ctx); | |
1129 | spin_lock(&inode->i_lock); | |
1130 | list_add(&ctx->list, &nfsi->open_files); | |
1131 | spin_unlock(&inode->i_lock); | |
1132 | } | |
1133 | ||
d530838b TM |
1134 | /* |
1135 | * Given an inode, search for an open context with the desired characteristics | |
1136 | */ | |
1137 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
1138 | { |
1139 | struct nfs_inode *nfsi = NFS_I(inode); | |
1140 | struct nfs_open_context *pos, *ctx = NULL; | |
1141 | ||
1142 | spin_lock(&inode->i_lock); | |
1143 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
1144 | if (cred != NULL && pos->cred != cred) |
1145 | continue; | |
1da177e4 LT |
1146 | if ((pos->mode & mode) == mode) { |
1147 | ctx = get_nfs_open_context(pos); | |
1148 | break; | |
1149 | } | |
1150 | } | |
1151 | spin_unlock(&inode->i_lock); | |
1152 | return ctx; | |
1153 | } | |
1154 | ||
b92dccf6 | 1155 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 LT |
1156 | { |
1157 | struct inode *inode = filp->f_dentry->d_inode; | |
1158 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; | |
1159 | ||
1160 | if (ctx) { | |
1161 | filp->private_data = NULL; | |
1162 | spin_lock(&inode->i_lock); | |
1163 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
1164 | spin_unlock(&inode->i_lock); | |
1165 | put_nfs_open_context(ctx); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * These allocate and release file read/write context information. | |
1171 | */ | |
1172 | int nfs_open(struct inode *inode, struct file *filp) | |
1173 | { | |
1174 | struct nfs_open_context *ctx; | |
1175 | struct rpc_cred *cred; | |
1176 | ||
1177 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
1178 | if (IS_ERR(cred)) | |
1179 | return PTR_ERR(cred); | |
b92dccf6 | 1180 | ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); |
1da177e4 LT |
1181 | put_rpccred(cred); |
1182 | if (ctx == NULL) | |
1183 | return -ENOMEM; | |
1184 | ctx->mode = filp->f_mode; | |
1185 | nfs_file_set_open_context(filp, ctx); | |
1186 | put_nfs_open_context(ctx); | |
1da177e4 LT |
1187 | return 0; |
1188 | } | |
1189 | ||
1190 | int nfs_release(struct inode *inode, struct file *filp) | |
1191 | { | |
1da177e4 LT |
1192 | nfs_file_clear_open_context(filp); |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | /* | |
1197 | * This function is called whenever some part of NFS notices that | |
1198 | * the cached attributes have to be refreshed. | |
1199 | */ | |
1200 | int | |
1201 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1202 | { | |
1203 | int status = -ESTALE; | |
1204 | struct nfs_fattr fattr; | |
1205 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
1206 | |
1207 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
1208 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
1209 | ||
1842bfb4 | 1210 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
1211 | lock_kernel(); |
1212 | if (!inode || is_bad_inode(inode)) | |
1213 | goto out_nowait; | |
1214 | if (NFS_STALE(inode)) | |
1215 | goto out_nowait; | |
1216 | ||
412d582e CL |
1217 | status = nfs_wait_on_inode(inode); |
1218 | if (status < 0) | |
1219 | goto out; | |
1220 | if (NFS_STALE(inode)) { | |
1221 | status = -ESTALE; | |
1222 | /* Do we trust the cached ESTALE? */ | |
1223 | if (NFS_ATTRTIMEO(inode) != 0) { | |
44b11874 | 1224 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) { |
412d582e CL |
1225 | /* no */ |
1226 | } else | |
1227 | goto out; | |
1228 | } | |
1da177e4 | 1229 | } |
1da177e4 | 1230 | |
1da177e4 LT |
1231 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
1232 | if (status != 0) { | |
1233 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
1234 | inode->i_sb->s_id, | |
1235 | (long long)NFS_FILEID(inode), status); | |
1236 | if (status == -ESTALE) { | |
1237 | nfs_zap_caches(inode); | |
1238 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 1239 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
1240 | } |
1241 | goto out; | |
1242 | } | |
1243 | ||
33801147 | 1244 | spin_lock(&inode->i_lock); |
24aa1fe6 | 1245 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 1246 | if (status) { |
33801147 | 1247 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
1248 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
1249 | inode->i_sb->s_id, | |
1250 | (long long)NFS_FILEID(inode), status); | |
1251 | goto out; | |
1252 | } | |
dc59250c | 1253 | spin_unlock(&inode->i_lock); |
55296809 | 1254 | |
24aa1fe6 | 1255 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1256 | nfs_zap_acl_cache(inode); |
55296809 | 1257 | |
1da177e4 LT |
1258 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
1259 | inode->i_sb->s_id, | |
1260 | (long long)NFS_FILEID(inode)); | |
1261 | ||
412d582e CL |
1262 | out: |
1263 | nfs_wake_up_inode(inode); | |
1264 | ||
1da177e4 LT |
1265 | out_nowait: |
1266 | unlock_kernel(); | |
1267 | return status; | |
1268 | } | |
1269 | ||
1270 | int nfs_attribute_timeout(struct inode *inode) | |
1271 | { | |
1272 | struct nfs_inode *nfsi = NFS_I(inode); | |
1273 | ||
1274 | if (nfs_have_delegation(inode, FMODE_READ)) | |
1275 | return 0; | |
1276 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1281 | * @server - pointer to nfs_server struct | |
1282 | * @inode - pointer to inode struct | |
1283 | * | |
1284 | * Updates inode attribute information by retrieving the data from the server. | |
1285 | */ | |
1286 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1287 | { | |
44b11874 | 1288 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
1289 | && !nfs_attribute_timeout(inode)) |
1290 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1291 | return __nfs_revalidate_inode(server, inode); | |
1292 | } | |
1293 | ||
7d52e862 TM |
1294 | /** |
1295 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1296 | * @inode - pointer to host inode | |
1297 | * @mapping - pointer to mapping | |
1298 | */ | |
44b11874 | 1299 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
1300 | { |
1301 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
1302 | int ret = 0; |
1303 | ||
1304 | if (NFS_STALE(inode)) | |
1305 | ret = -ESTALE; | |
1306 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1307 | || nfs_attribute_timeout(inode)) | |
1308 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
7d52e862 | 1309 | |
55296809 | 1310 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
91d5b470 | 1311 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
29884df0 TM |
1312 | if (S_ISREG(inode->i_mode)) |
1313 | nfs_sync_mapping(mapping); | |
7d52e862 | 1314 | invalidate_inode_pages2(mapping); |
dc59250c CL |
1315 | |
1316 | spin_lock(&inode->i_lock); | |
55296809 | 1317 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
7d52e862 TM |
1318 | if (S_ISDIR(inode->i_mode)) { |
1319 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
1320 | /* This ensures we revalidate child dentries */ | |
913a70fc | 1321 | nfsi->cache_change_attribute = jiffies; |
7d52e862 | 1322 | } |
dc59250c CL |
1323 | spin_unlock(&inode->i_lock); |
1324 | ||
7d52e862 TM |
1325 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
1326 | inode->i_sb->s_id, | |
1327 | (long long)NFS_FILEID(inode)); | |
1328 | } | |
44b11874 | 1329 | return ret; |
7d52e862 TM |
1330 | } |
1331 | ||
1da177e4 LT |
1332 | /** |
1333 | * nfs_begin_data_update | |
1334 | * @inode - pointer to inode | |
1335 | * Declare that a set of operations will update file data on the server | |
1336 | */ | |
1337 | void nfs_begin_data_update(struct inode *inode) | |
1338 | { | |
1339 | atomic_inc(&NFS_I(inode)->data_updates); | |
1340 | } | |
1341 | ||
1342 | /** | |
1343 | * nfs_end_data_update | |
1344 | * @inode - pointer to inode | |
1345 | * Declare end of the operations that will update file data | |
1346 | * This will mark the inode as immediately needing revalidation | |
1347 | * of its attribute cache. | |
1348 | */ | |
1349 | void nfs_end_data_update(struct inode *inode) | |
1350 | { | |
1351 | struct nfs_inode *nfsi = NFS_I(inode); | |
1352 | ||
1353 | if (!nfs_have_delegation(inode, FMODE_READ)) { | |
decf491f TM |
1354 | /* Directories and symlinks: invalidate page cache */ |
1355 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
1356 | spin_lock(&inode->i_lock); | |
55296809 | 1357 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
1358 | spin_unlock(&inode->i_lock); |
1359 | } | |
1da177e4 | 1360 | } |
913a70fc | 1361 | nfsi->cache_change_attribute = jiffies; |
1da177e4 LT |
1362 | atomic_dec(&nfsi->data_updates); |
1363 | } | |
1364 | ||
a895b4a1 TM |
1365 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1366 | { | |
1367 | struct nfs_inode *nfsi = NFS_I(inode); | |
1368 | ||
a895b4a1 TM |
1369 | /* If we have atomic WCC data, we may update some attributes */ |
1370 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
1371 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { | |
1372 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1373 | nfsi->cache_change_attribute = jiffies; | |
1374 | } | |
1375 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
1376 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
1377 | nfsi->cache_change_attribute = jiffies; | |
1378 | } | |
1379 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) { | |
1380 | inode->i_size = fattr->size; | |
1381 | nfsi->cache_change_attribute = jiffies; | |
1382 | } | |
1383 | } | |
1384 | } | |
1385 | ||
1da177e4 | 1386 | /** |
33801147 | 1387 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1388 | * @inode - pointer to inode |
1389 | * @fattr - updated attributes | |
1390 | * | |
1391 | * Verifies the attribute cache. If we have just changed the attributes, | |
1392 | * so that fattr carries weak cache consistency data, then it may | |
1393 | * also update the ctime/mtime/change_attribute. | |
1394 | */ | |
33801147 | 1395 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1396 | { |
1397 | struct nfs_inode *nfsi = NFS_I(inode); | |
1398 | loff_t cur_size, new_isize; | |
1399 | int data_unstable; | |
1400 | ||
dc59250c | 1401 | |
ca62b9c3 TM |
1402 | /* Has the inode gone and changed behind our back? */ |
1403 | if (nfsi->fileid != fattr->fileid | |
1404 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
1405 | return -EIO; | |
1406 | } | |
1407 | ||
1da177e4 LT |
1408 | /* Are we in the process of updating data on the server? */ |
1409 | data_unstable = nfs_caches_unstable(inode); | |
1410 | ||
a895b4a1 TM |
1411 | /* Do atomic weak cache consistency updates */ |
1412 | nfs_wcc_update_inode(inode, fattr); | |
1da177e4 | 1413 | |
9d1e9232 | 1414 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
f1bb0b92 TM |
1415 | nfsi->change_attr != fattr->change_attr) |
1416 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1417 | |
1da177e4 | 1418 | /* Verify a few of the more important attributes */ |
f1bb0b92 TM |
1419 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
1420 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
ca62b9c3 TM |
1421 | |
1422 | cur_size = i_size_read(inode); | |
1423 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 TM |
1424 | if (cur_size != new_isize && nfsi->npages == 0) |
1425 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
1426 | |
1427 | /* Have any file permissions changed? */ | |
1428 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
1429 | || inode->i_uid != fattr->uid | |
1430 | || inode->i_gid != fattr->gid) | |
55296809 | 1431 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1432 | |
1433 | /* Has the link count changed? */ | |
1434 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 1435 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1436 | |
1437 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
55296809 | 1438 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 1439 | |
33801147 | 1440 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1441 | return 0; |
1442 | } | |
1443 | ||
33801147 TM |
1444 | /** |
1445 | * nfs_refresh_inode - try to update the inode attribute cache | |
1446 | * @inode - pointer to inode | |
1447 | * @fattr - updated attributes | |
1448 | * | |
1449 | * Check that an RPC call that returned attributes has not overlapped with | |
1450 | * other recent updates of the inode metadata, then decide whether it is | |
1451 | * safe to do a full update of the inode attributes, or whether just to | |
1452 | * call nfs_check_inode_attributes. | |
1453 | */ | |
1454 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1455 | { | |
1456 | struct nfs_inode *nfsi = NFS_I(inode); | |
1457 | int status; | |
1458 | ||
1459 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1460 | return 0; | |
1461 | spin_lock(&inode->i_lock); | |
33801147 | 1462 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 1463 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
1464 | else |
1465 | status = nfs_check_inode_attributes(inode, fattr); | |
1466 | ||
1467 | spin_unlock(&inode->i_lock); | |
1468 | return status; | |
1469 | } | |
1470 | ||
decf491f TM |
1471 | /** |
1472 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1473 | * @inode - pointer to inode | |
1474 | * @fattr - updated attributes | |
1475 | * | |
1476 | * After an operation that has changed the inode metadata, mark the | |
1477 | * attribute cache as being invalid, then try to update it. | |
1478 | */ | |
1479 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1480 | { | |
1481 | struct nfs_inode *nfsi = NFS_I(inode); | |
1482 | int status = 0; | |
1483 | ||
1484 | spin_lock(&inode->i_lock); | |
1485 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { | |
f1bb0b92 | 1486 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
decf491f TM |
1487 | goto out; |
1488 | } | |
24aa1fe6 | 1489 | status = nfs_update_inode(inode, fattr); |
decf491f TM |
1490 | out: |
1491 | spin_unlock(&inode->i_lock); | |
1492 | return status; | |
1493 | } | |
1494 | ||
1da177e4 LT |
1495 | /* |
1496 | * Many nfs protocol calls return the new file attributes after | |
1497 | * an operation. Here we update the inode to reflect the state | |
1498 | * of the server's inode. | |
1499 | * | |
1500 | * This is a bit tricky because we have to make sure all dirty pages | |
1501 | * have been sent off to the server before calling invalidate_inode_pages. | |
1502 | * To make sure no other process adds more write requests while we try | |
1503 | * our best to flush them, we make them sleep during the attribute refresh. | |
1504 | * | |
1505 | * A very similar scenario holds for the dir cache. | |
1506 | */ | |
24aa1fe6 | 1507 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1508 | { |
8b4bdcf8 | 1509 | struct nfs_server *server; |
1da177e4 | 1510 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1511 | loff_t cur_isize, new_isize; |
1da177e4 | 1512 | unsigned int invalid = 0; |
24aa1fe6 | 1513 | int data_stable; |
1da177e4 LT |
1514 | |
1515 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
1516 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
1517 | atomic_read(&inode->i_count), fattr->valid); | |
1518 | ||
325cfed9 CL |
1519 | if (nfsi->fileid != fattr->fileid) |
1520 | goto out_fileid; | |
1da177e4 LT |
1521 | |
1522 | /* | |
1523 | * Make sure the inode's type hasn't changed. | |
1524 | */ | |
33801147 | 1525 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
1526 | goto out_changed; |
1527 | ||
8b4bdcf8 TM |
1528 | server = NFS_SERVER(inode); |
1529 | /* Update the fsid if and only if this is the root directory */ | |
1530 | if (inode == inode->i_sb->s_root->d_inode | |
1531 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) | |
1532 | server->fsid = fattr->fsid; | |
1533 | ||
1da177e4 LT |
1534 | /* |
1535 | * Update the read time so we don't revalidate too often. | |
1536 | */ | |
33801147 TM |
1537 | nfsi->read_cache_jiffies = fattr->time_start; |
1538 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
1539 | |
1540 | /* Are we racing with known updates of the metadata on the server? */ | |
24aa1fe6 TM |
1541 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
1542 | if (data_stable) | |
f1bb0b92 | 1543 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME); |
1da177e4 | 1544 | |
a895b4a1 TM |
1545 | /* Do atomic weak cache consistency updates */ |
1546 | nfs_wcc_update_inode(inode, fattr); | |
1547 | ||
951a143b | 1548 | /* Check if our cached file size is stale */ |
1da177e4 LT |
1549 | new_isize = nfs_size_to_loff_t(fattr->size); |
1550 | cur_isize = i_size_read(inode); | |
951a143b TM |
1551 | if (new_isize != cur_isize) { |
1552 | /* Do we perhaps have any outstanding writes? */ | |
1553 | if (nfsi->npages == 0) { | |
1554 | /* No, but did we race with nfs_end_data_update()? */ | |
24aa1fe6 | 1555 | if (data_stable) { |
1da177e4 | 1556 | inode->i_size = new_isize; |
951a143b | 1557 | invalid |= NFS_INO_INVALID_DATA; |
1da177e4 | 1558 | } |
951a143b TM |
1559 | invalid |= NFS_INO_INVALID_ATTR; |
1560 | } else if (new_isize > cur_isize) { | |
1da177e4 LT |
1561 | inode->i_size = new_isize; |
1562 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1563 | } | |
24aa1fe6 | 1564 | nfsi->cache_change_attribute = jiffies; |
951a143b TM |
1565 | dprintk("NFS: isize change on server for file %s/%ld\n", |
1566 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
1567 | } |
1568 | ||
951a143b | 1569 | /* Check if the mtime agrees */ |
1da177e4 LT |
1570 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
1571 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
951a143b TM |
1572 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
1573 | inode->i_sb->s_id, inode->i_ino); | |
24aa1fe6 TM |
1574 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
1575 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
1576 | } |
1577 | ||
ada70d94 TM |
1578 | /* If ctime has changed we should definitely clear access+acl caches */ |
1579 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { | |
24aa1fe6 | 1580 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
ada70d94 | 1581 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
24aa1fe6 | 1582 | nfsi->cache_change_attribute = jiffies; |
ada70d94 | 1583 | } |
1da177e4 LT |
1584 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
1585 | ||
1586 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
1587 | inode->i_uid != fattr->uid || | |
1588 | inode->i_gid != fattr->gid) | |
ada70d94 | 1589 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
1590 | |
1591 | inode->i_mode = fattr->mode; | |
1592 | inode->i_nlink = fattr->nlink; | |
1593 | inode->i_uid = fattr->uid; | |
1594 | inode->i_gid = fattr->gid; | |
1595 | ||
1596 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
1597 | /* | |
1598 | * report the blocks in 512byte units | |
1599 | */ | |
1600 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1601 | inode->i_blksize = inode->i_sb->s_blocksize; | |
1602 | } else { | |
1603 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1604 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
1605 | } | |
1606 | ||
9d1e9232 TM |
1607 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
1608 | nfsi->change_attr != fattr->change_attr) { | |
1609 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
1610 | inode->i_sb->s_id, inode->i_ino); | |
1611 | nfsi->change_attr = fattr->change_attr; | |
1612 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
1613 | nfsi->cache_change_attribute = jiffies; | |
ca62b9c3 TM |
1614 | } |
1615 | ||
1da177e4 LT |
1616 | /* Update attrtimeo value if we're out of the unstable period */ |
1617 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1618 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 LT |
1619 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
1620 | nfsi->attrtimeo_timestamp = jiffies; | |
1621 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { | |
1622 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
1623 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1624 | nfsi->attrtimeo_timestamp = jiffies; | |
1625 | } | |
1626 | /* Don't invalidate the data if we were to blame */ | |
1627 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1628 | || S_ISLNK(inode->i_mode))) | |
1629 | invalid &= ~NFS_INO_INVALID_DATA; | |
24aa1fe6 TM |
1630 | if (data_stable) |
1631 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1632 | if (!nfs_have_delegation(inode, FMODE_READ)) |
55296809 | 1633 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1634 | |
1635 | return 0; | |
1636 | out_changed: | |
1637 | /* | |
1638 | * Big trouble! The inode has become a different object. | |
1639 | */ | |
1640 | #ifdef NFS_PARANOIA | |
1641 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", | |
1642 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
1643 | #endif | |
b37b03b7 | 1644 | out_err: |
1da177e4 LT |
1645 | /* |
1646 | * No need to worry about unhashing the dentry, as the | |
1647 | * lookup validation will know that the inode is bad. | |
1648 | * (But we fall through to invalidate the caches.) | |
1649 | */ | |
1650 | nfs_invalidate_inode(inode); | |
1da177e4 | 1651 | return -ESTALE; |
325cfed9 CL |
1652 | |
1653 | out_fileid: | |
1654 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1655 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1656 | NFS_SERVER(inode)->hostname, inode->i_sb->s_id, | |
1657 | (long long)nfsi->fileid, (long long)fattr->fileid); | |
1658 | goto out_err; | |
1da177e4 LT |
1659 | } |
1660 | ||
1661 | /* | |
1662 | * File system information | |
1663 | */ | |
1664 | ||
55a97593 TM |
1665 | /* |
1666 | * nfs_path - reconstruct the path given an arbitrary dentry | |
1667 | * @base - arbitrary string to prepend to the path | |
1668 | * @dentry - pointer to dentry | |
1669 | * @buffer - result buffer | |
1670 | * @buflen - length of buffer | |
1671 | * | |
1672 | * Helper function for constructing the path from the | |
1673 | * root dentry to an arbitrary hashed dentry. | |
1674 | * | |
1675 | * This is mainly for use in figuring out the path on the | |
1676 | * server side when automounting on top of an existing partition. | |
1677 | */ | |
1678 | static char *nfs_path(const char *base, const struct dentry *dentry, | |
1679 | char *buffer, ssize_t buflen) | |
1680 | { | |
1681 | char *end = buffer+buflen; | |
1682 | int namelen; | |
1683 | ||
1684 | *--end = '\0'; | |
1685 | buflen--; | |
1686 | spin_lock(&dcache_lock); | |
1687 | while (!IS_ROOT(dentry)) { | |
1688 | namelen = dentry->d_name.len; | |
1689 | buflen -= namelen + 1; | |
1690 | if (buflen < 0) | |
1691 | goto Elong; | |
1692 | end -= namelen; | |
1693 | memcpy(end, dentry->d_name.name, namelen); | |
1694 | *--end = '/'; | |
1695 | dentry = dentry->d_parent; | |
1696 | } | |
1697 | spin_unlock(&dcache_lock); | |
1698 | namelen = strlen(base); | |
1699 | /* Strip off excess slashes in base string */ | |
1700 | while (namelen > 0 && base[namelen - 1] == '/') | |
1701 | namelen--; | |
1702 | buflen -= namelen; | |
1703 | if (buflen < 0) | |
1704 | goto Elong; | |
1705 | end -= namelen; | |
1706 | memcpy(end, base, namelen); | |
1707 | return end; | |
1708 | Elong: | |
1709 | return ERR_PTR(-ENAMETOOLONG); | |
1710 | } | |
1711 | ||
1712 | struct nfs_clone_mount { | |
1713 | const struct super_block *sb; | |
1714 | const struct dentry *dentry; | |
1715 | struct nfs_fh *fh; | |
1716 | struct nfs_fattr *fattr; | |
1717 | }; | |
1718 | ||
1719 | static struct super_block *nfs_clone_generic_sb(struct nfs_clone_mount *data, | |
61f5164c MN |
1720 | struct super_block *(*fill_sb)(struct nfs_server *, struct nfs_clone_mount *), |
1721 | struct nfs_server *(*fill_server)(struct super_block *, struct nfs_clone_mount *)) | |
55a97593 TM |
1722 | { |
1723 | struct nfs_server *server; | |
1724 | struct nfs_server *parent = NFS_SB(data->sb); | |
1725 | struct super_block *sb = ERR_PTR(-EINVAL); | |
1726 | void *err = ERR_PTR(-ENOMEM); | |
55a97593 TM |
1727 | int len; |
1728 | ||
1729 | server = kmalloc(sizeof(struct nfs_server), GFP_KERNEL); | |
1730 | if (server == NULL) | |
1731 | goto out_err; | |
1732 | memcpy(server, parent, sizeof(*server)); | |
1733 | len = strlen(parent->hostname) + 1; | |
1734 | server->hostname = kmalloc(len, GFP_KERNEL); | |
1735 | if (server->hostname == NULL) | |
1736 | goto free_server; | |
1737 | memcpy(server->hostname, parent->hostname, len); | |
55a97593 TM |
1738 | if (rpciod_up() != 0) |
1739 | goto free_hostname; | |
1740 | ||
61f5164c | 1741 | sb = fill_sb(server, data); |
55a97593 TM |
1742 | if (IS_ERR((err = sb)) || sb->s_root) |
1743 | goto kill_rpciod; | |
1744 | ||
61f5164c MN |
1745 | server = fill_server(sb, data); |
1746 | if (IS_ERR((err = server))) | |
55a97593 | 1747 | goto out_deactivate; |
55a97593 | 1748 | return sb; |
55a97593 TM |
1749 | out_deactivate: |
1750 | up_write(&sb->s_umount); | |
1751 | deactivate_super(sb); | |
1752 | return (struct super_block *)err; | |
1753 | kill_rpciod: | |
1754 | rpciod_down(); | |
1755 | free_hostname: | |
1756 | kfree(server->hostname); | |
1757 | free_server: | |
1758 | kfree(server); | |
1759 | out_err: | |
1760 | return (struct super_block *)err; | |
1761 | } | |
1762 | ||
1da177e4 LT |
1763 | static int nfs_set_super(struct super_block *s, void *data) |
1764 | { | |
1765 | s->s_fs_info = data; | |
1766 | return set_anon_super(s, data); | |
1767 | } | |
1768 | ||
1769 | static int nfs_compare_super(struct super_block *sb, void *data) | |
1770 | { | |
1771 | struct nfs_server *server = data; | |
1772 | struct nfs_server *old = NFS_SB(sb); | |
1773 | ||
1774 | if (old->addr.sin_addr.s_addr != server->addr.sin_addr.s_addr) | |
1775 | return 0; | |
1776 | if (old->addr.sin_port != server->addr.sin_port) | |
1777 | return 0; | |
1778 | return !nfs_compare_fh(&old->fh, &server->fh); | |
1779 | } | |
1780 | ||
1781 | static struct super_block *nfs_get_sb(struct file_system_type *fs_type, | |
1782 | int flags, const char *dev_name, void *raw_data) | |
1783 | { | |
1784 | int error; | |
9085bbcb | 1785 | struct nfs_server *server = NULL; |
1da177e4 LT |
1786 | struct super_block *s; |
1787 | struct nfs_fh *root; | |
1788 | struct nfs_mount_data *data = raw_data; | |
1789 | ||
9085bbcb TM |
1790 | s = ERR_PTR(-EINVAL); |
1791 | if (data == NULL) { | |
1792 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
1793 | goto out_err; | |
1794 | } | |
1795 | if (data->version <= 0 || data->version > NFS_MOUNT_VERSION) { | |
1796 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
1797 | goto out_err; | |
1da177e4 | 1798 | } |
9085bbcb TM |
1799 | switch (data->version) { |
1800 | case 1: | |
1801 | data->namlen = 0; | |
1802 | case 2: | |
1803 | data->bsize = 0; | |
1804 | case 3: | |
1805 | if (data->flags & NFS_MOUNT_VER3) { | |
1806 | dprintk("%s: mount structure version %d does not support NFSv3\n", | |
1807 | __FUNCTION__, | |
1808 | data->version); | |
1809 | goto out_err; | |
1810 | } | |
1811 | data->root.size = NFS2_FHSIZE; | |
1812 | memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE); | |
1813 | case 4: | |
1814 | if (data->flags & NFS_MOUNT_SECFLAVOUR) { | |
1815 | dprintk("%s: mount structure version %d does not support strong security\n", | |
1816 | __FUNCTION__, | |
1817 | data->version); | |
1818 | goto out_err; | |
1819 | } | |
1820 | case 5: | |
1821 | memset(data->context, 0, sizeof(data->context)); | |
1822 | } | |
1823 | #ifndef CONFIG_NFS_V3 | |
1824 | /* If NFSv3 is not compiled in, return -EPROTONOSUPPORT */ | |
1825 | s = ERR_PTR(-EPROTONOSUPPORT); | |
1826 | if (data->flags & NFS_MOUNT_VER3) { | |
1827 | dprintk("%s: NFSv3 not compiled into kernel\n", __FUNCTION__); | |
1828 | goto out_err; | |
1829 | } | |
1830 | #endif /* CONFIG_NFS_V3 */ | |
1da177e4 | 1831 | |
9085bbcb | 1832 | s = ERR_PTR(-ENOMEM); |
bd647545 | 1833 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
1da177e4 | 1834 | if (!server) |
9085bbcb | 1835 | goto out_err; |
1da177e4 LT |
1836 | /* Zero out the NFS state stuff */ |
1837 | init_nfsv4_state(server); | |
b7fa0554 | 1838 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 1839 | |
1da177e4 LT |
1840 | root = &server->fh; |
1841 | if (data->flags & NFS_MOUNT_VER3) | |
1842 | root->size = data->root.size; | |
1843 | else | |
1844 | root->size = NFS2_FHSIZE; | |
9085bbcb | 1845 | s = ERR_PTR(-EINVAL); |
1da177e4 | 1846 | if (root->size > sizeof(root->data)) { |
9085bbcb TM |
1847 | dprintk("%s: invalid root filehandle\n", __FUNCTION__); |
1848 | goto out_err; | |
1da177e4 LT |
1849 | } |
1850 | memcpy(root->data, data->root.data, root->size); | |
1851 | ||
1852 | /* We now require that the mount process passes the remote address */ | |
1853 | memcpy(&server->addr, &data->addr, sizeof(server->addr)); | |
1854 | if (server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
1855 | dprintk("%s: mount program didn't pass remote address!\n", |
1856 | __FUNCTION__); | |
1857 | goto out_err; | |
1da177e4 LT |
1858 | } |
1859 | ||
9085bbcb TM |
1860 | /* Fire up rpciod if not yet running */ |
1861 | s = ERR_PTR(rpciod_up()); | |
1862 | if (IS_ERR(s)) { | |
1863 | dprintk("%s: couldn't start rpciod! Error = %ld\n", | |
1864 | __FUNCTION__, PTR_ERR(s)); | |
1865 | goto out_err; | |
1da177e4 LT |
1866 | } |
1867 | ||
9085bbcb TM |
1868 | s = sget(fs_type, nfs_compare_super, nfs_set_super, server); |
1869 | if (IS_ERR(s) || s->s_root) | |
1870 | goto out_rpciod_down; | |
1da177e4 | 1871 | |
9085bbcb | 1872 | s->s_flags = flags; |
1da177e4 | 1873 | |
9b04c997 | 1874 | error = nfs_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
1875 | if (error) { |
1876 | up_write(&s->s_umount); | |
1877 | deactivate_super(s); | |
1878 | return ERR_PTR(error); | |
1879 | } | |
1880 | s->s_flags |= MS_ACTIVE; | |
1881 | return s; | |
9085bbcb TM |
1882 | out_rpciod_down: |
1883 | rpciod_down(); | |
1884 | out_err: | |
1885 | kfree(server); | |
1886 | return s; | |
1da177e4 LT |
1887 | } |
1888 | ||
1889 | static void nfs_kill_super(struct super_block *s) | |
1890 | { | |
1891 | struct nfs_server *server = NFS_SB(s); | |
1892 | ||
1893 | kill_anon_super(s); | |
1894 | ||
6a19275a | 1895 | if (!IS_ERR(server->client)) |
1da177e4 | 1896 | rpc_shutdown_client(server->client); |
6a19275a | 1897 | if (!IS_ERR(server->client_sys)) |
1da177e4 | 1898 | rpc_shutdown_client(server->client_sys); |
b7fa0554 AG |
1899 | if (!IS_ERR(server->client_acl)) |
1900 | rpc_shutdown_client(server->client_acl); | |
1da177e4 LT |
1901 | |
1902 | if (!(server->flags & NFS_MOUNT_NONLM)) | |
1903 | lockd_down(); /* release rpc.lockd */ | |
1904 | ||
1905 | rpciod_down(); /* release rpciod */ | |
1906 | ||
01d0ae8b | 1907 | nfs_free_iostats(server->io_stats); |
f99d49ad | 1908 | kfree(server->hostname); |
1da177e4 | 1909 | kfree(server); |
51d8fa6a | 1910 | nfs_release_automount_timer(); |
1da177e4 LT |
1911 | } |
1912 | ||
1913 | static struct file_system_type nfs_fs_type = { | |
1914 | .owner = THIS_MODULE, | |
1915 | .name = "nfs", | |
1916 | .get_sb = nfs_get_sb, | |
1917 | .kill_sb = nfs_kill_super, | |
1918 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
1919 | }; | |
1920 | ||
61f5164c | 1921 | static struct super_block *nfs_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) |
55a97593 TM |
1922 | { |
1923 | struct super_block *sb; | |
1924 | ||
61f5164c MN |
1925 | server->fsid = data->fattr->fsid; |
1926 | nfs_copy_fh(&server->fh, data->fh); | |
55a97593 TM |
1927 | sb = sget(&nfs_fs_type, nfs_compare_super, nfs_set_super, server); |
1928 | if (!IS_ERR(sb) && sb->s_root == NULL && !(server->flags & NFS_MOUNT_NONLM)) | |
1929 | lockd_up(); | |
1930 | return sb; | |
1931 | } | |
1932 | ||
61f5164c MN |
1933 | static struct nfs_server *nfs_clone_server(struct super_block *sb, struct nfs_clone_mount *data) |
1934 | { | |
1935 | struct nfs_server *server = NFS_SB(sb); | |
1936 | struct nfs_server *parent = NFS_SB(data->sb); | |
1937 | struct inode *root_inode; | |
1938 | struct nfs_fsinfo fsinfo; | |
1939 | void *err = ERR_PTR(-ENOMEM); | |
1940 | ||
1941 | sb->s_op = data->sb->s_op; | |
1942 | sb->s_blocksize = data->sb->s_blocksize; | |
1943 | sb->s_blocksize_bits = data->sb->s_blocksize_bits; | |
1944 | sb->s_maxbytes = data->sb->s_maxbytes; | |
1945 | ||
1946 | server->client_sys = server->client_acl = ERR_PTR(-EINVAL); | |
1947 | server->io_stats = nfs_alloc_iostats(); | |
1948 | if (server->io_stats == NULL) | |
1949 | goto out; | |
1950 | ||
1951 | server->client = rpc_clone_client(parent->client); | |
1952 | if (IS_ERR((err = server->client))) | |
1953 | goto out; | |
1954 | ||
1955 | if (!IS_ERR(parent->client_sys)) { | |
1956 | server->client_sys = rpc_clone_client(parent->client_sys); | |
1957 | if (IS_ERR((err = server->client_sys))) | |
1958 | goto out; | |
1959 | } | |
1960 | if (!IS_ERR(parent->client_acl)) { | |
1961 | server->client_acl = rpc_clone_client(parent->client_acl); | |
1962 | if (IS_ERR((err = server->client_acl))) | |
1963 | goto out; | |
1964 | } | |
1965 | root_inode = nfs_fhget(sb, data->fh, data->fattr); | |
1966 | if (!root_inode) | |
1967 | goto out; | |
1968 | sb->s_root = d_alloc_root(root_inode); | |
1969 | if (!sb->s_root) | |
1970 | goto out_put_root; | |
1971 | fsinfo.fattr = data->fattr; | |
1972 | if (NFS_PROTO(root_inode)->fsinfo(server, data->fh, &fsinfo) == 0) | |
1973 | nfs_super_set_maxbytes(sb, fsinfo.maxfilesize); | |
1974 | sb->s_root->d_op = server->rpc_ops->dentry_ops; | |
1975 | sb->s_flags |= MS_ACTIVE; | |
1976 | return server; | |
1977 | out_put_root: | |
1978 | iput(root_inode); | |
1979 | out: | |
1980 | return err; | |
1981 | } | |
1982 | ||
55a97593 TM |
1983 | static struct super_block *nfs_clone_nfs_sb(struct file_system_type *fs_type, |
1984 | int flags, const char *dev_name, void *raw_data) | |
1985 | { | |
1986 | struct nfs_clone_mount *data = raw_data; | |
61f5164c | 1987 | return nfs_clone_generic_sb(data, nfs_clone_sb, nfs_clone_server); |
55a97593 TM |
1988 | } |
1989 | ||
1990 | static struct file_system_type clone_nfs_fs_type = { | |
1991 | .owner = THIS_MODULE, | |
1992 | .name = "nfs", | |
1993 | .get_sb = nfs_clone_nfs_sb, | |
1994 | .kill_sb = nfs_kill_super, | |
1995 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
1996 | }; | |
1997 | ||
1da177e4 LT |
1998 | #ifdef CONFIG_NFS_V4 |
1999 | ||
2000 | static void nfs4_clear_inode(struct inode *); | |
2001 | ||
2002 | ||
2003 | static struct super_operations nfs4_sops = { | |
2004 | .alloc_inode = nfs_alloc_inode, | |
2005 | .destroy_inode = nfs_destroy_inode, | |
2006 | .write_inode = nfs_write_inode, | |
1da177e4 LT |
2007 | .statfs = nfs_statfs, |
2008 | .clear_inode = nfs4_clear_inode, | |
2009 | .umount_begin = nfs_umount_begin, | |
2010 | .show_options = nfs_show_options, | |
d9ef5a8c | 2011 | .show_stats = nfs_show_stats, |
1da177e4 LT |
2012 | }; |
2013 | ||
2014 | /* | |
2015 | * Clean out any remaining NFSv4 state that might be left over due | |
2016 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
2017 | * nfs_open(). | |
2018 | */ | |
2019 | static void nfs4_clear_inode(struct inode *inode) | |
2020 | { | |
2021 | struct nfs_inode *nfsi = NFS_I(inode); | |
2022 | ||
2023 | /* If we are holding a delegation, return it! */ | |
cae7a073 | 2024 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
2025 | /* First call standard NFS clear_inode() code */ |
2026 | nfs_clear_inode(inode); | |
2027 | /* Now clear out any remaining state */ | |
2028 | while (!list_empty(&nfsi->open_states)) { | |
2029 | struct nfs4_state *state; | |
2030 | ||
2031 | state = list_entry(nfsi->open_states.next, | |
2032 | struct nfs4_state, | |
2033 | inode_states); | |
2034 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", | |
2035 | __FUNCTION__, | |
2036 | inode->i_sb->s_id, | |
2037 | (long long)NFS_FILEID(inode), | |
2038 | state); | |
2039 | BUG_ON(atomic_read(&state->count) != 1); | |
2040 | nfs4_close_state(state, state->state); | |
2041 | } | |
2042 | } | |
2043 | ||
2044 | ||
c818ba43 MN |
2045 | static struct rpc_clnt *nfs4_create_client(struct nfs_server *server, |
2046 | struct rpc_timeout *timeparms, int proto, rpc_authflavor_t flavor) | |
1da177e4 | 2047 | { |
c818ba43 | 2048 | struct nfs4_client *clp; |
1da177e4 LT |
2049 | struct rpc_xprt *xprt = NULL; |
2050 | struct rpc_clnt *clnt = NULL; | |
eab5c084 | 2051 | int err = -EIO; |
1da177e4 | 2052 | |
1da177e4 LT |
2053 | clp = nfs4_get_client(&server->addr.sin_addr); |
2054 | if (!clp) { | |
9085bbcb | 2055 | dprintk("%s: failed to create NFS4 client.\n", __FUNCTION__); |
c818ba43 | 2056 | return ERR_PTR(err); |
1da177e4 LT |
2057 | } |
2058 | ||
2059 | /* Now create transport and client */ | |
1da177e4 | 2060 | down_write(&clp->cl_sem); |
6a19275a | 2061 | if (IS_ERR(clp->cl_rpcclient)) { |
c818ba43 | 2062 | xprt = xprt_create_proto(proto, &server->addr, timeparms); |
1da177e4 LT |
2063 | if (IS_ERR(xprt)) { |
2064 | up_write(&clp->cl_sem); | |
1da177e4 | 2065 | err = PTR_ERR(xprt); |
9085bbcb TM |
2066 | dprintk("%s: cannot create RPC transport. Error = %d\n", |
2067 | __FUNCTION__, err); | |
1da177e4 LT |
2068 | goto out_fail; |
2069 | } | |
2070 | clnt = rpc_create_client(xprt, server->hostname, &nfs_program, | |
c818ba43 | 2071 | server->rpc_ops->version, flavor); |
1da177e4 LT |
2072 | if (IS_ERR(clnt)) { |
2073 | up_write(&clp->cl_sem); | |
1da177e4 | 2074 | err = PTR_ERR(clnt); |
9085bbcb TM |
2075 | dprintk("%s: cannot create RPC client. Error = %d\n", |
2076 | __FUNCTION__, err); | |
1da177e4 LT |
2077 | goto out_fail; |
2078 | } | |
2079 | clnt->cl_intr = 1; | |
2080 | clnt->cl_softrtry = 1; | |
1da177e4 | 2081 | clp->cl_rpcclient = clnt; |
1da177e4 LT |
2082 | memcpy(clp->cl_ipaddr, server->ip_addr, sizeof(clp->cl_ipaddr)); |
2083 | nfs_idmap_new(clp); | |
2084 | } | |
1da177e4 LT |
2085 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); |
2086 | clnt = rpc_clone_client(clp->cl_rpcclient); | |
2087 | if (!IS_ERR(clnt)) | |
c818ba43 | 2088 | server->nfs4_state = clp; |
1da177e4 LT |
2089 | up_write(&clp->cl_sem); |
2090 | clp = NULL; | |
2091 | ||
2092 | if (IS_ERR(clnt)) { | |
9085bbcb TM |
2093 | dprintk("%s: cannot create RPC client. Error = %d\n", |
2094 | __FUNCTION__, err); | |
c818ba43 | 2095 | return clnt; |
1da177e4 LT |
2096 | } |
2097 | ||
1da177e4 | 2098 | if (server->nfs4_state->cl_idmap == NULL) { |
9085bbcb | 2099 | dprintk("%s: failed to create idmapper.\n", __FUNCTION__); |
c818ba43 | 2100 | return ERR_PTR(-ENOMEM); |
1da177e4 LT |
2101 | } |
2102 | ||
c818ba43 | 2103 | if (clnt->cl_auth->au_flavor != flavor) { |
6a19275a BF |
2104 | struct rpc_auth *auth; |
2105 | ||
c818ba43 | 2106 | auth = rpcauth_create(flavor, clnt); |
6a19275a | 2107 | if (IS_ERR(auth)) { |
9085bbcb | 2108 | dprintk("%s: couldn't create credcache!\n", __FUNCTION__); |
c818ba43 | 2109 | return (struct rpc_clnt *)auth; |
1da177e4 LT |
2110 | } |
2111 | } | |
c818ba43 MN |
2112 | return clnt; |
2113 | ||
2114 | out_fail: | |
2115 | if (clp) | |
2116 | nfs4_put_client(clp); | |
2117 | return ERR_PTR(err); | |
2118 | } | |
2119 | ||
2120 | static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data, int silent) | |
2121 | { | |
2122 | struct nfs_server *server; | |
2123 | struct rpc_timeout timeparms; | |
2124 | rpc_authflavor_t authflavour; | |
2125 | int err = -EIO; | |
2126 | ||
2127 | sb->s_blocksize_bits = 0; | |
2128 | sb->s_blocksize = 0; | |
2129 | server = NFS_SB(sb); | |
2130 | if (data->rsize != 0) | |
2131 | server->rsize = nfs_block_size(data->rsize, NULL); | |
2132 | if (data->wsize != 0) | |
2133 | server->wsize = nfs_block_size(data->wsize, NULL); | |
2134 | server->flags = data->flags & NFS_MOUNT_FLAGMASK; | |
2135 | server->caps = NFS_CAP_ATOMIC_OPEN; | |
2136 | ||
2137 | server->acregmin = data->acregmin*HZ; | |
2138 | server->acregmax = data->acregmax*HZ; | |
2139 | server->acdirmin = data->acdirmin*HZ; | |
2140 | server->acdirmax = data->acdirmax*HZ; | |
2141 | ||
2142 | server->rpc_ops = &nfs_v4_clientops; | |
2143 | ||
2144 | nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans); | |
2145 | ||
2146 | server->retrans_timeo = timeparms.to_initval; | |
2147 | server->retrans_count = timeparms.to_retries; | |
2148 | ||
2149 | /* Now create transport and client */ | |
2150 | authflavour = RPC_AUTH_UNIX; | |
2151 | if (data->auth_flavourlen != 0) { | |
2152 | if (data->auth_flavourlen != 1) { | |
2153 | dprintk("%s: Invalid number of RPC auth flavours %d.\n", | |
2154 | __FUNCTION__, data->auth_flavourlen); | |
2155 | err = -EINVAL; | |
2156 | goto out_fail; | |
2157 | } | |
2158 | if (copy_from_user(&authflavour, data->auth_flavours, sizeof(authflavour))) { | |
2159 | err = -EFAULT; | |
2160 | goto out_fail; | |
2161 | } | |
2162 | } | |
2163 | ||
2164 | server->client = nfs4_create_client(server, &timeparms, data->proto, authflavour); | |
2165 | if (IS_ERR(server->client)) { | |
2166 | err = PTR_ERR(server->client); | |
2167 | dprintk("%s: cannot create RPC client. Error = %d\n", | |
2168 | __FUNCTION__, err); | |
2169 | goto out_fail; | |
2170 | } | |
1da177e4 LT |
2171 | |
2172 | sb->s_time_gran = 1; | |
2173 | ||
2174 | sb->s_op = &nfs4_sops; | |
2175 | err = nfs_sb_init(sb, authflavour); | |
c818ba43 MN |
2176 | |
2177 | out_fail: | |
1da177e4 LT |
2178 | return err; |
2179 | } | |
2180 | ||
2181 | static int nfs4_compare_super(struct super_block *sb, void *data) | |
2182 | { | |
2183 | struct nfs_server *server = data; | |
2184 | struct nfs_server *old = NFS_SB(sb); | |
2185 | ||
2186 | if (strcmp(server->hostname, old->hostname) != 0) | |
2187 | return 0; | |
2188 | if (strcmp(server->mnt_path, old->mnt_path) != 0) | |
2189 | return 0; | |
2190 | return 1; | |
2191 | } | |
2192 | ||
2193 | static void * | |
2194 | nfs_copy_user_string(char *dst, struct nfs_string *src, int maxlen) | |
2195 | { | |
2196 | void *p = NULL; | |
2197 | ||
2198 | if (!src->len) | |
2199 | return ERR_PTR(-EINVAL); | |
2200 | if (src->len < maxlen) | |
2201 | maxlen = src->len; | |
2202 | if (dst == NULL) { | |
2203 | p = dst = kmalloc(maxlen + 1, GFP_KERNEL); | |
2204 | if (p == NULL) | |
2205 | return ERR_PTR(-ENOMEM); | |
2206 | } | |
2207 | if (copy_from_user(dst, src->data, maxlen)) { | |
f99d49ad | 2208 | kfree(p); |
1da177e4 LT |
2209 | return ERR_PTR(-EFAULT); |
2210 | } | |
2211 | dst[maxlen] = '\0'; | |
2212 | return dst; | |
2213 | } | |
2214 | ||
2215 | static struct super_block *nfs4_get_sb(struct file_system_type *fs_type, | |
2216 | int flags, const char *dev_name, void *raw_data) | |
2217 | { | |
2218 | int error; | |
2219 | struct nfs_server *server; | |
2220 | struct super_block *s; | |
2221 | struct nfs4_mount_data *data = raw_data; | |
2222 | void *p; | |
2223 | ||
9085bbcb TM |
2224 | if (data == NULL) { |
2225 | dprintk("%s: missing data argument\n", __FUNCTION__); | |
2226 | return ERR_PTR(-EINVAL); | |
2227 | } | |
2228 | if (data->version <= 0 || data->version > NFS4_MOUNT_VERSION) { | |
2229 | dprintk("%s: bad mount version\n", __FUNCTION__); | |
1da177e4 LT |
2230 | return ERR_PTR(-EINVAL); |
2231 | } | |
2232 | ||
bd647545 | 2233 | server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL); |
1da177e4 LT |
2234 | if (!server) |
2235 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
2236 | /* Zero out the NFS state stuff */ |
2237 | init_nfsv4_state(server); | |
b7fa0554 | 2238 | server->client = server->client_sys = server->client_acl = ERR_PTR(-EINVAL); |
1da177e4 | 2239 | |
1da177e4 LT |
2240 | p = nfs_copy_user_string(NULL, &data->hostname, 256); |
2241 | if (IS_ERR(p)) | |
2242 | goto out_err; | |
2243 | server->hostname = p; | |
2244 | ||
2245 | p = nfs_copy_user_string(NULL, &data->mnt_path, 1024); | |
2246 | if (IS_ERR(p)) | |
2247 | goto out_err; | |
2248 | server->mnt_path = p; | |
2249 | ||
2250 | p = nfs_copy_user_string(server->ip_addr, &data->client_addr, | |
2251 | sizeof(server->ip_addr) - 1); | |
2252 | if (IS_ERR(p)) | |
2253 | goto out_err; | |
2254 | ||
2255 | /* We now require that the mount process passes the remote address */ | |
2256 | if (data->host_addrlen != sizeof(server->addr)) { | |
2257 | s = ERR_PTR(-EINVAL); | |
2258 | goto out_free; | |
2259 | } | |
2260 | if (copy_from_user(&server->addr, data->host_addr, sizeof(server->addr))) { | |
2261 | s = ERR_PTR(-EFAULT); | |
2262 | goto out_free; | |
2263 | } | |
2264 | if (server->addr.sin_family != AF_INET || | |
2265 | server->addr.sin_addr.s_addr == INADDR_ANY) { | |
9085bbcb TM |
2266 | dprintk("%s: mount program didn't pass remote IP address!\n", |
2267 | __FUNCTION__); | |
1da177e4 LT |
2268 | s = ERR_PTR(-EINVAL); |
2269 | goto out_free; | |
2270 | } | |
2271 | ||
9085bbcb TM |
2272 | /* Fire up rpciod if not yet running */ |
2273 | s = ERR_PTR(rpciod_up()); | |
2274 | if (IS_ERR(s)) { | |
2275 | dprintk("%s: couldn't start rpciod! Error = %ld\n", | |
2276 | __FUNCTION__, PTR_ERR(s)); | |
2277 | goto out_free; | |
2278 | } | |
2279 | ||
1da177e4 LT |
2280 | s = sget(fs_type, nfs4_compare_super, nfs_set_super, server); |
2281 | ||
2282 | if (IS_ERR(s) || s->s_root) | |
2283 | goto out_free; | |
2284 | ||
2285 | s->s_flags = flags; | |
2286 | ||
9b04c997 | 2287 | error = nfs4_fill_super(s, data, flags & MS_SILENT ? 1 : 0); |
1da177e4 LT |
2288 | if (error) { |
2289 | up_write(&s->s_umount); | |
2290 | deactivate_super(s); | |
2291 | return ERR_PTR(error); | |
2292 | } | |
2293 | s->s_flags |= MS_ACTIVE; | |
2294 | return s; | |
2295 | out_err: | |
2296 | s = (struct super_block *)p; | |
2297 | out_free: | |
f99d49ad JJ |
2298 | kfree(server->mnt_path); |
2299 | kfree(server->hostname); | |
1da177e4 LT |
2300 | kfree(server); |
2301 | return s; | |
2302 | } | |
2303 | ||
2304 | static void nfs4_kill_super(struct super_block *sb) | |
2305 | { | |
2306 | struct nfs_server *server = NFS_SB(sb); | |
2307 | ||
2308 | nfs_return_all_delegations(sb); | |
2309 | kill_anon_super(sb); | |
2310 | ||
2311 | nfs4_renewd_prepare_shutdown(server); | |
2312 | ||
2313 | if (server->client != NULL && !IS_ERR(server->client)) | |
2314 | rpc_shutdown_client(server->client); | |
1da177e4 LT |
2315 | |
2316 | destroy_nfsv4_state(server); | |
2317 | ||
967b9281 TM |
2318 | rpciod_down(); |
2319 | ||
01d0ae8b | 2320 | nfs_free_iostats(server->io_stats); |
f99d49ad | 2321 | kfree(server->hostname); |
1da177e4 | 2322 | kfree(server); |
51d8fa6a | 2323 | nfs_release_automount_timer(); |
1da177e4 LT |
2324 | } |
2325 | ||
2326 | static struct file_system_type nfs4_fs_type = { | |
2327 | .owner = THIS_MODULE, | |
2328 | .name = "nfs4", | |
2329 | .get_sb = nfs4_get_sb, | |
2330 | .kill_sb = nfs4_kill_super, | |
2331 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
2332 | }; | |
2333 | ||
a72b4422 TM |
2334 | static const int nfs_set_port_min = 0; |
2335 | static const int nfs_set_port_max = 65535; | |
2336 | static int param_set_port(const char *val, struct kernel_param *kp) | |
2337 | { | |
2338 | char *endp; | |
2339 | int num = simple_strtol(val, &endp, 0); | |
2340 | if (endp == val || *endp || num < nfs_set_port_min || num > nfs_set_port_max) | |
2341 | return -EINVAL; | |
2342 | *((int *)kp->arg) = num; | |
2343 | return 0; | |
2344 | } | |
2345 | ||
2346 | module_param_call(callback_tcpport, param_set_port, param_get_int, | |
2347 | &nfs_callback_set_tcpport, 0644); | |
2348 | ||
58df095b TM |
2349 | static int param_set_idmap_timeout(const char *val, struct kernel_param *kp) |
2350 | { | |
2351 | char *endp; | |
2352 | int num = simple_strtol(val, &endp, 0); | |
2353 | int jif = num * HZ; | |
2354 | if (endp == val || *endp || num < 0 || jif < num) | |
2355 | return -EINVAL; | |
2356 | *((int *)kp->arg) = jif; | |
2357 | return 0; | |
2358 | } | |
2359 | ||
2360 | module_param_call(idmap_cache_timeout, param_set_idmap_timeout, param_get_int, | |
2361 | &nfs_idmap_cache_timeout, 0644); | |
2362 | ||
55a97593 TM |
2363 | /* Constructs the SERVER-side path */ |
2364 | static inline char *nfs4_path(const struct dentry *dentry, char *buffer, ssize_t buflen) | |
2365 | { | |
2366 | return nfs_path(NFS_SB(dentry->d_sb)->mnt_path, dentry, buffer, buflen); | |
2367 | } | |
2368 | ||
2369 | static inline char *nfs4_dup_path(const struct dentry *dentry) | |
2370 | { | |
2371 | char *page = (char *) __get_free_page(GFP_USER); | |
2372 | char *path; | |
2373 | ||
2374 | path = nfs4_path(dentry, page, PAGE_SIZE); | |
2375 | if (!IS_ERR(path)) { | |
2376 | int len = PAGE_SIZE + page - path; | |
2377 | char *tmp = path; | |
2378 | ||
2379 | path = kmalloc(len, GFP_KERNEL); | |
2380 | if (path) | |
2381 | memcpy(path, tmp, len); | |
2382 | else | |
2383 | path = ERR_PTR(-ENOMEM); | |
2384 | } | |
2385 | free_page((unsigned long)page); | |
2386 | return path; | |
2387 | } | |
2388 | ||
61f5164c | 2389 | static struct super_block *nfs4_clone_sb(struct nfs_server *server, struct nfs_clone_mount *data) |
55a97593 TM |
2390 | { |
2391 | const struct dentry *dentry = data->dentry; | |
2392 | struct nfs4_client *clp = server->nfs4_state; | |
2393 | struct super_block *sb; | |
2394 | ||
61f5164c MN |
2395 | server->fsid = data->fattr->fsid; |
2396 | nfs_copy_fh(&server->fh, data->fh); | |
55a97593 TM |
2397 | server->mnt_path = nfs4_dup_path(dentry); |
2398 | if (IS_ERR(server->mnt_path)) { | |
2399 | sb = (struct super_block *)server->mnt_path; | |
2400 | goto err; | |
2401 | } | |
2402 | sb = sget(&nfs4_fs_type, nfs4_compare_super, nfs_set_super, server); | |
2403 | if (IS_ERR(sb) || sb->s_root) | |
2404 | goto free_path; | |
2405 | nfs4_server_capabilities(server, &server->fh); | |
2406 | ||
2407 | down_write(&clp->cl_sem); | |
2408 | atomic_inc(&clp->cl_count); | |
2409 | list_add_tail(&server->nfs4_siblings, &clp->cl_superblocks); | |
2410 | up_write(&clp->cl_sem); | |
2411 | return sb; | |
2412 | free_path: | |
2413 | kfree(server->mnt_path); | |
2414 | err: | |
2415 | server->mnt_path = NULL; | |
2416 | return sb; | |
2417 | } | |
2418 | ||
2419 | static struct super_block *nfs_clone_nfs4_sb(struct file_system_type *fs_type, | |
2420 | int flags, const char *dev_name, void *raw_data) | |
2421 | { | |
2422 | struct nfs_clone_mount *data = raw_data; | |
61f5164c | 2423 | return nfs_clone_generic_sb(data, nfs4_clone_sb, nfs_clone_server); |
55a97593 TM |
2424 | } |
2425 | ||
2426 | static struct file_system_type clone_nfs4_fs_type = { | |
2427 | .owner = THIS_MODULE, | |
61f5164c | 2428 | .name = "nfs4", |
55a97593 TM |
2429 | .get_sb = nfs_clone_nfs4_sb, |
2430 | .kill_sb = nfs4_kill_super, | |
2431 | .fs_flags = FS_ODD_RENAME|FS_REVAL_DOT|FS_BINARY_MOUNTDATA, | |
2432 | }; | |
2433 | ||
1da177e4 LT |
2434 | #define nfs4_init_once(nfsi) \ |
2435 | do { \ | |
2436 | INIT_LIST_HEAD(&(nfsi)->open_states); \ | |
2437 | nfsi->delegation = NULL; \ | |
2438 | nfsi->delegation_state = 0; \ | |
2439 | init_rwsem(&nfsi->rwsem); \ | |
2440 | } while(0) | |
a72b4422 TM |
2441 | |
2442 | static inline int register_nfs4fs(void) | |
2443 | { | |
2444 | int ret; | |
2445 | ||
2446 | ret = nfs_register_sysctl(); | |
2447 | if (ret != 0) | |
2448 | return ret; | |
2449 | ret = register_filesystem(&nfs4_fs_type); | |
2450 | if (ret != 0) | |
2451 | nfs_unregister_sysctl(); | |
2452 | return ret; | |
2453 | } | |
2454 | ||
2455 | static inline void unregister_nfs4fs(void) | |
2456 | { | |
2457 | unregister_filesystem(&nfs4_fs_type); | |
2458 | nfs_unregister_sysctl(); | |
2459 | } | |
1da177e4 | 2460 | #else |
55a97593 | 2461 | #define nfs4_clone_client(a,b) ERR_PTR(-EINVAL) |
1da177e4 LT |
2462 | #define nfs4_init_once(nfsi) \ |
2463 | do { } while (0) | |
2464 | #define register_nfs4fs() (0) | |
2465 | #define unregister_nfs4fs() | |
2466 | #endif | |
2467 | ||
55a97593 TM |
2468 | static inline char *nfs_devname(const struct vfsmount *mnt_parent, |
2469 | const struct dentry *dentry, | |
2470 | char *buffer, ssize_t buflen) | |
2471 | { | |
2472 | return nfs_path(mnt_parent->mnt_devname, dentry, buffer, buflen); | |
2473 | } | |
2474 | ||
2475 | /** | |
2476 | * nfs_do_submount - set up mountpoint when crossing a filesystem boundary | |
2477 | * @mnt_parent - mountpoint of parent directory | |
2478 | * @dentry - parent directory | |
2479 | * @fh - filehandle for new root dentry | |
2480 | * @fattr - attributes for new root inode | |
2481 | * | |
2482 | */ | |
2483 | struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent, | |
2484 | const struct dentry *dentry, struct nfs_fh *fh, | |
2485 | struct nfs_fattr *fattr) | |
2486 | { | |
2487 | struct nfs_clone_mount mountdata = { | |
2488 | .sb = mnt_parent->mnt_sb, | |
2489 | .dentry = dentry, | |
2490 | .fh = fh, | |
2491 | .fattr = fattr, | |
2492 | }; | |
2493 | struct vfsmount *mnt = ERR_PTR(-ENOMEM); | |
2494 | char *page = (char *) __get_free_page(GFP_USER); | |
2495 | char *devname; | |
2496 | ||
2497 | dprintk("%s: submounting on %s/%s\n", __FUNCTION__, | |
2498 | dentry->d_parent->d_name.name, | |
2499 | dentry->d_name.name); | |
2500 | if (page == NULL) | |
2501 | goto out; | |
2502 | devname = nfs_devname(mnt_parent, dentry, page, PAGE_SIZE); | |
2503 | mnt = (struct vfsmount *)devname; | |
2504 | if (IS_ERR(devname)) | |
2505 | goto free_page; | |
2506 | switch (NFS_SB(mnt_parent->mnt_sb)->rpc_ops->version) { | |
2507 | case 2: | |
2508 | case 3: | |
2509 | mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, &mountdata); | |
2510 | break; | |
2511 | case 4: | |
2512 | mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, &mountdata); | |
2513 | break; | |
2514 | default: | |
2515 | BUG(); | |
2516 | } | |
2517 | free_page: | |
2518 | free_page((unsigned long)page); | |
2519 | out: | |
2520 | dprintk("%s: done\n", __FUNCTION__); | |
2521 | return mnt; | |
2522 | } | |
2523 | ||
1da177e4 LT |
2524 | extern int nfs_init_nfspagecache(void); |
2525 | extern void nfs_destroy_nfspagecache(void); | |
2526 | extern int nfs_init_readpagecache(void); | |
2527 | extern void nfs_destroy_readpagecache(void); | |
2528 | extern int nfs_init_writepagecache(void); | |
2529 | extern void nfs_destroy_writepagecache(void); | |
2530 | #ifdef CONFIG_NFS_DIRECTIO | |
2531 | extern int nfs_init_directcache(void); | |
2532 | extern void nfs_destroy_directcache(void); | |
2533 | #endif | |
2534 | ||
2535 | static kmem_cache_t * nfs_inode_cachep; | |
2536 | ||
2537 | static struct inode *nfs_alloc_inode(struct super_block *sb) | |
2538 | { | |
2539 | struct nfs_inode *nfsi; | |
2540 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); | |
2541 | if (!nfsi) | |
2542 | return NULL; | |
55296809 CL |
2543 | nfsi->flags = 0UL; |
2544 | nfsi->cache_validity = 0UL; | |
223db122 | 2545 | nfsi->cache_change_attribute = jiffies; |
458818ed TM |
2546 | #ifdef CONFIG_NFS_V3_ACL |
2547 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
2548 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
2549 | #endif | |
e50a1c2e BF |
2550 | #ifdef CONFIG_NFS_V4 |
2551 | nfsi->nfs4_acl = NULL; | |
2552 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
2553 | return &nfsi->vfs_inode; |
2554 | } | |
2555 | ||
2556 | static void nfs_destroy_inode(struct inode *inode) | |
2557 | { | |
2558 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2559 | } | |
2560 | ||
2561 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) | |
2562 | { | |
2563 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
2564 | ||
2565 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
2566 | SLAB_CTOR_CONSTRUCTOR) { | |
2567 | inode_init_once(&nfsi->vfs_inode); | |
2568 | spin_lock_init(&nfsi->req_lock); | |
2569 | INIT_LIST_HEAD(&nfsi->dirty); | |
2570 | INIT_LIST_HEAD(&nfsi->commit); | |
2571 | INIT_LIST_HEAD(&nfsi->open_files); | |
2572 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
2573 | atomic_set(&nfsi->data_updates, 0); | |
2574 | nfsi->ndirty = 0; | |
2575 | nfsi->ncommit = 0; | |
2576 | nfsi->npages = 0; | |
1da177e4 LT |
2577 | nfs4_init_once(nfsi); |
2578 | } | |
2579 | } | |
2580 | ||
75c96f85 | 2581 | static int nfs_init_inodecache(void) |
1da177e4 LT |
2582 | { |
2583 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2584 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
2585 | 0, (SLAB_RECLAIM_ACCOUNT| |
2586 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
2587 | init_once, NULL); |
2588 | if (nfs_inode_cachep == NULL) | |
2589 | return -ENOMEM; | |
2590 | ||
2591 | return 0; | |
2592 | } | |
2593 | ||
75c96f85 | 2594 | static void nfs_destroy_inodecache(void) |
1da177e4 LT |
2595 | { |
2596 | if (kmem_cache_destroy(nfs_inode_cachep)) | |
2597 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * Initialize NFS | |
2602 | */ | |
2603 | static int __init init_nfs_fs(void) | |
2604 | { | |
2605 | int err; | |
2606 | ||
2607 | err = nfs_init_nfspagecache(); | |
2608 | if (err) | |
2609 | goto out4; | |
2610 | ||
2611 | err = nfs_init_inodecache(); | |
2612 | if (err) | |
2613 | goto out3; | |
2614 | ||
2615 | err = nfs_init_readpagecache(); | |
2616 | if (err) | |
2617 | goto out2; | |
2618 | ||
2619 | err = nfs_init_writepagecache(); | |
2620 | if (err) | |
2621 | goto out1; | |
2622 | ||
2623 | #ifdef CONFIG_NFS_DIRECTIO | |
2624 | err = nfs_init_directcache(); | |
2625 | if (err) | |
2626 | goto out0; | |
2627 | #endif | |
2628 | ||
2629 | #ifdef CONFIG_PROC_FS | |
2630 | rpc_proc_register(&nfs_rpcstat); | |
2631 | #endif | |
2632 | err = register_filesystem(&nfs_fs_type); | |
2633 | if (err) | |
2634 | goto out; | |
2635 | if ((err = register_nfs4fs()) != 0) | |
2636 | goto out; | |
2637 | return 0; | |
2638 | out: | |
2639 | #ifdef CONFIG_PROC_FS | |
2640 | rpc_proc_unregister("nfs"); | |
2641 | #endif | |
1da177e4 | 2642 | #ifdef CONFIG_NFS_DIRECTIO |
1da177e4 | 2643 | nfs_destroy_directcache(); |
6b59a754 | 2644 | out0: |
1da177e4 | 2645 | #endif |
6b59a754 | 2646 | nfs_destroy_writepagecache(); |
1da177e4 LT |
2647 | out1: |
2648 | nfs_destroy_readpagecache(); | |
2649 | out2: | |
2650 | nfs_destroy_inodecache(); | |
2651 | out3: | |
2652 | nfs_destroy_nfspagecache(); | |
2653 | out4: | |
2654 | return err; | |
2655 | } | |
2656 | ||
2657 | static void __exit exit_nfs_fs(void) | |
2658 | { | |
2659 | #ifdef CONFIG_NFS_DIRECTIO | |
2660 | nfs_destroy_directcache(); | |
2661 | #endif | |
2662 | nfs_destroy_writepagecache(); | |
2663 | nfs_destroy_readpagecache(); | |
2664 | nfs_destroy_inodecache(); | |
2665 | nfs_destroy_nfspagecache(); | |
2666 | #ifdef CONFIG_PROC_FS | |
2667 | rpc_proc_unregister("nfs"); | |
2668 | #endif | |
2669 | unregister_filesystem(&nfs_fs_type); | |
2670 | unregister_nfs4fs(); | |
2671 | } | |
2672 | ||
2673 | /* Not quite true; I just maintain it */ | |
2674 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2675 | MODULE_LICENSE("GPL"); | |
2676 | ||
2677 | module_init(init_nfs_fs) | |
2678 | module_exit(exit_nfs_fs) |