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1 | /* | |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
39 | #include <linux/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
50 | #include <linux/mount.h> | |
51 | ||
52 | #include "nfs4_fs.h" | |
53 | #include "delegation.h" | |
54 | #include "iostat.h" | |
55 | ||
56 | #define NFSDBG_FACILITY NFSDBG_PROC | |
57 | ||
58 | #define NFS4_POLL_RETRY_MIN (1*HZ) | |
59 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
60 | ||
61 | struct nfs4_opendata; | |
62 | static int _nfs4_proc_open(struct nfs4_opendata *data); | |
63 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); | |
64 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); | |
65 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); | |
66 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); | |
67 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp); | |
68 | ||
69 | /* Prevent leaks of NFSv4 errors into userland */ | |
70 | int nfs4_map_errors(int err) | |
71 | { | |
72 | if (err < -1000) { | |
73 | dprintk("%s could not handle NFSv4 error %d\n", | |
74 | __FUNCTION__, -err); | |
75 | return -EIO; | |
76 | } | |
77 | return err; | |
78 | } | |
79 | ||
80 | /* | |
81 | * This is our standard bitmap for GETATTR requests. | |
82 | */ | |
83 | const u32 nfs4_fattr_bitmap[2] = { | |
84 | FATTR4_WORD0_TYPE | |
85 | | FATTR4_WORD0_CHANGE | |
86 | | FATTR4_WORD0_SIZE | |
87 | | FATTR4_WORD0_FSID | |
88 | | FATTR4_WORD0_FILEID, | |
89 | FATTR4_WORD1_MODE | |
90 | | FATTR4_WORD1_NUMLINKS | |
91 | | FATTR4_WORD1_OWNER | |
92 | | FATTR4_WORD1_OWNER_GROUP | |
93 | | FATTR4_WORD1_RAWDEV | |
94 | | FATTR4_WORD1_SPACE_USED | |
95 | | FATTR4_WORD1_TIME_ACCESS | |
96 | | FATTR4_WORD1_TIME_METADATA | |
97 | | FATTR4_WORD1_TIME_MODIFY | |
98 | }; | |
99 | ||
100 | const u32 nfs4_statfs_bitmap[2] = { | |
101 | FATTR4_WORD0_FILES_AVAIL | |
102 | | FATTR4_WORD0_FILES_FREE | |
103 | | FATTR4_WORD0_FILES_TOTAL, | |
104 | FATTR4_WORD1_SPACE_AVAIL | |
105 | | FATTR4_WORD1_SPACE_FREE | |
106 | | FATTR4_WORD1_SPACE_TOTAL | |
107 | }; | |
108 | ||
109 | const u32 nfs4_pathconf_bitmap[2] = { | |
110 | FATTR4_WORD0_MAXLINK | |
111 | | FATTR4_WORD0_MAXNAME, | |
112 | 0 | |
113 | }; | |
114 | ||
115 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
116 | | FATTR4_WORD0_MAXREAD | |
117 | | FATTR4_WORD0_MAXWRITE | |
118 | | FATTR4_WORD0_LEASE_TIME, | |
119 | 0 | |
120 | }; | |
121 | ||
122 | const u32 nfs4_fs_locations_bitmap[2] = { | |
123 | FATTR4_WORD0_TYPE | |
124 | | FATTR4_WORD0_CHANGE | |
125 | | FATTR4_WORD0_SIZE | |
126 | | FATTR4_WORD0_FSID | |
127 | | FATTR4_WORD0_FILEID | |
128 | | FATTR4_WORD0_FS_LOCATIONS, | |
129 | FATTR4_WORD1_MODE | |
130 | | FATTR4_WORD1_NUMLINKS | |
131 | | FATTR4_WORD1_OWNER | |
132 | | FATTR4_WORD1_OWNER_GROUP | |
133 | | FATTR4_WORD1_RAWDEV | |
134 | | FATTR4_WORD1_SPACE_USED | |
135 | | FATTR4_WORD1_TIME_ACCESS | |
136 | | FATTR4_WORD1_TIME_METADATA | |
137 | | FATTR4_WORD1_TIME_MODIFY | |
138 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
139 | }; | |
140 | ||
141 | static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, | |
142 | struct nfs4_readdir_arg *readdir) | |
143 | { | |
144 | u32 *start, *p; | |
145 | ||
146 | BUG_ON(readdir->count < 80); | |
147 | if (cookie > 2) { | |
148 | readdir->cookie = cookie; | |
149 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); | |
150 | return; | |
151 | } | |
152 | ||
153 | readdir->cookie = 0; | |
154 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
155 | if (cookie == 2) | |
156 | return; | |
157 | ||
158 | /* | |
159 | * NFSv4 servers do not return entries for '.' and '..' | |
160 | * Therefore, we fake these entries here. We let '.' | |
161 | * have cookie 0 and '..' have cookie 1. Note that | |
162 | * when talking to the server, we always send cookie 0 | |
163 | * instead of 1 or 2. | |
164 | */ | |
165 | start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); | |
166 | ||
167 | if (cookie == 0) { | |
168 | *p++ = xdr_one; /* next */ | |
169 | *p++ = xdr_zero; /* cookie, first word */ | |
170 | *p++ = xdr_one; /* cookie, second word */ | |
171 | *p++ = xdr_one; /* entry len */ | |
172 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
173 | p++; | |
174 | *p++ = xdr_one; /* bitmap length */ | |
175 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
176 | *p++ = htonl(8); /* attribute buffer length */ | |
177 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); | |
178 | } | |
179 | ||
180 | *p++ = xdr_one; /* next */ | |
181 | *p++ = xdr_zero; /* cookie, first word */ | |
182 | *p++ = xdr_two; /* cookie, second word */ | |
183 | *p++ = xdr_two; /* entry len */ | |
184 | memcpy(p, "..\0\0", 4); /* entry */ | |
185 | p++; | |
186 | *p++ = xdr_one; /* bitmap length */ | |
187 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
188 | *p++ = htonl(8); /* attribute buffer length */ | |
189 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); | |
190 | ||
191 | readdir->pgbase = (char *)p - (char *)start; | |
192 | readdir->count -= readdir->pgbase; | |
193 | kunmap_atomic(start, KM_USER0); | |
194 | } | |
195 | ||
196 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) | |
197 | { | |
198 | struct nfs4_client *clp = server->nfs4_state; | |
199 | spin_lock(&clp->cl_lock); | |
200 | if (time_before(clp->cl_last_renewal,timestamp)) | |
201 | clp->cl_last_renewal = timestamp; | |
202 | spin_unlock(&clp->cl_lock); | |
203 | } | |
204 | ||
205 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) | |
206 | { | |
207 | struct nfs_inode *nfsi = NFS_I(dir); | |
208 | ||
209 | spin_lock(&dir->i_lock); | |
210 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
211 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) | |
212 | nfsi->change_attr = cinfo->after; | |
213 | spin_unlock(&dir->i_lock); | |
214 | } | |
215 | ||
216 | struct nfs4_opendata { | |
217 | atomic_t count; | |
218 | struct nfs_openargs o_arg; | |
219 | struct nfs_openres o_res; | |
220 | struct nfs_open_confirmargs c_arg; | |
221 | struct nfs_open_confirmres c_res; | |
222 | struct nfs_fattr f_attr; | |
223 | struct nfs_fattr dir_attr; | |
224 | struct dentry *dentry; | |
225 | struct dentry *dir; | |
226 | struct nfs4_state_owner *owner; | |
227 | struct iattr attrs; | |
228 | unsigned long timestamp; | |
229 | int rpc_status; | |
230 | int cancelled; | |
231 | }; | |
232 | ||
233 | static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, | |
234 | struct nfs4_state_owner *sp, int flags, | |
235 | const struct iattr *attrs) | |
236 | { | |
237 | struct dentry *parent = dget_parent(dentry); | |
238 | struct inode *dir = parent->d_inode; | |
239 | struct nfs_server *server = NFS_SERVER(dir); | |
240 | struct nfs4_opendata *p; | |
241 | ||
242 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
243 | if (p == NULL) | |
244 | goto err; | |
245 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
246 | if (p->o_arg.seqid == NULL) | |
247 | goto err_free; | |
248 | atomic_set(&p->count, 1); | |
249 | p->dentry = dget(dentry); | |
250 | p->dir = parent; | |
251 | p->owner = sp; | |
252 | atomic_inc(&sp->so_count); | |
253 | p->o_arg.fh = NFS_FH(dir); | |
254 | p->o_arg.open_flags = flags, | |
255 | p->o_arg.clientid = server->nfs4_state->cl_clientid; | |
256 | p->o_arg.id = sp->so_id; | |
257 | p->o_arg.name = &dentry->d_name; | |
258 | p->o_arg.server = server; | |
259 | p->o_arg.bitmask = server->attr_bitmask; | |
260 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
261 | p->o_res.f_attr = &p->f_attr; | |
262 | p->o_res.dir_attr = &p->dir_attr; | |
263 | p->o_res.server = server; | |
264 | nfs_fattr_init(&p->f_attr); | |
265 | nfs_fattr_init(&p->dir_attr); | |
266 | if (flags & O_EXCL) { | |
267 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
268 | s[0] = jiffies; | |
269 | s[1] = current->pid; | |
270 | } else if (flags & O_CREAT) { | |
271 | p->o_arg.u.attrs = &p->attrs; | |
272 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
273 | } | |
274 | p->c_arg.fh = &p->o_res.fh; | |
275 | p->c_arg.stateid = &p->o_res.stateid; | |
276 | p->c_arg.seqid = p->o_arg.seqid; | |
277 | return p; | |
278 | err_free: | |
279 | kfree(p); | |
280 | err: | |
281 | dput(parent); | |
282 | return NULL; | |
283 | } | |
284 | ||
285 | static void nfs4_opendata_free(struct nfs4_opendata *p) | |
286 | { | |
287 | if (p != NULL && atomic_dec_and_test(&p->count)) { | |
288 | nfs_free_seqid(p->o_arg.seqid); | |
289 | nfs4_put_state_owner(p->owner); | |
290 | dput(p->dir); | |
291 | dput(p->dentry); | |
292 | kfree(p); | |
293 | } | |
294 | } | |
295 | ||
296 | /* Helper for asynchronous RPC calls */ | |
297 | static int nfs4_call_async(struct rpc_clnt *clnt, | |
298 | const struct rpc_call_ops *tk_ops, void *calldata) | |
299 | { | |
300 | struct rpc_task *task; | |
301 | ||
302 | if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) | |
303 | return -ENOMEM; | |
304 | rpc_execute(task); | |
305 | return 0; | |
306 | } | |
307 | ||
308 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) | |
309 | { | |
310 | sigset_t oldset; | |
311 | int ret; | |
312 | ||
313 | rpc_clnt_sigmask(task->tk_client, &oldset); | |
314 | ret = rpc_wait_for_completion_task(task); | |
315 | rpc_clnt_sigunmask(task->tk_client, &oldset); | |
316 | return ret; | |
317 | } | |
318 | ||
319 | static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) | |
320 | { | |
321 | switch (open_flags) { | |
322 | case FMODE_WRITE: | |
323 | state->n_wronly++; | |
324 | break; | |
325 | case FMODE_READ: | |
326 | state->n_rdonly++; | |
327 | break; | |
328 | case FMODE_READ|FMODE_WRITE: | |
329 | state->n_rdwr++; | |
330 | } | |
331 | } | |
332 | ||
333 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) | |
334 | { | |
335 | struct inode *inode = state->inode; | |
336 | ||
337 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
338 | /* Protect against nfs4_find_state_byowner() */ | |
339 | spin_lock(&state->owner->so_lock); | |
340 | spin_lock(&inode->i_lock); | |
341 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); | |
342 | update_open_stateflags(state, open_flags); | |
343 | nfs4_state_set_mode_locked(state, state->state | open_flags); | |
344 | spin_unlock(&inode->i_lock); | |
345 | spin_unlock(&state->owner->so_lock); | |
346 | } | |
347 | ||
348 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) | |
349 | { | |
350 | struct inode *inode; | |
351 | struct nfs4_state *state = NULL; | |
352 | ||
353 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
354 | goto out; | |
355 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
356 | if (IS_ERR(inode)) | |
357 | goto out; | |
358 | state = nfs4_get_open_state(inode, data->owner); | |
359 | if (state == NULL) | |
360 | goto put_inode; | |
361 | update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); | |
362 | put_inode: | |
363 | iput(inode); | |
364 | out: | |
365 | return state; | |
366 | } | |
367 | ||
368 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) | |
369 | { | |
370 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
371 | struct nfs_open_context *ctx; | |
372 | ||
373 | spin_lock(&state->inode->i_lock); | |
374 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
375 | if (ctx->state != state) | |
376 | continue; | |
377 | get_nfs_open_context(ctx); | |
378 | spin_unlock(&state->inode->i_lock); | |
379 | return ctx; | |
380 | } | |
381 | spin_unlock(&state->inode->i_lock); | |
382 | return ERR_PTR(-ENOENT); | |
383 | } | |
384 | ||
385 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid) | |
386 | { | |
387 | int ret; | |
388 | ||
389 | opendata->o_arg.open_flags = openflags; | |
390 | ret = _nfs4_proc_open(opendata); | |
391 | if (ret != 0) | |
392 | return ret; | |
393 | memcpy(stateid->data, opendata->o_res.stateid.data, | |
394 | sizeof(stateid->data)); | |
395 | return 0; | |
396 | } | |
397 | ||
398 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
399 | { | |
400 | nfs4_stateid stateid; | |
401 | struct nfs4_state *newstate; | |
402 | int mode = 0; | |
403 | int delegation = 0; | |
404 | int ret; | |
405 | ||
406 | /* memory barrier prior to reading state->n_* */ | |
407 | smp_rmb(); | |
408 | if (state->n_rdwr != 0) { | |
409 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid); | |
410 | if (ret != 0) | |
411 | return ret; | |
412 | mode |= FMODE_READ|FMODE_WRITE; | |
413 | if (opendata->o_res.delegation_type != 0) | |
414 | delegation = opendata->o_res.delegation_type; | |
415 | smp_rmb(); | |
416 | } | |
417 | if (state->n_wronly != 0) { | |
418 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid); | |
419 | if (ret != 0) | |
420 | return ret; | |
421 | mode |= FMODE_WRITE; | |
422 | if (opendata->o_res.delegation_type != 0) | |
423 | delegation = opendata->o_res.delegation_type; | |
424 | smp_rmb(); | |
425 | } | |
426 | if (state->n_rdonly != 0) { | |
427 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid); | |
428 | if (ret != 0) | |
429 | return ret; | |
430 | mode |= FMODE_READ; | |
431 | } | |
432 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
433 | if (mode == 0) | |
434 | return 0; | |
435 | if (opendata->o_res.delegation_type == 0) | |
436 | opendata->o_res.delegation_type = delegation; | |
437 | opendata->o_arg.open_flags |= mode; | |
438 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
439 | if (newstate != NULL) { | |
440 | if (opendata->o_res.delegation_type != 0) { | |
441 | struct nfs_inode *nfsi = NFS_I(newstate->inode); | |
442 | int delegation_flags = 0; | |
443 | if (nfsi->delegation) | |
444 | delegation_flags = nfsi->delegation->flags; | |
445 | if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) | |
446 | nfs_inode_set_delegation(newstate->inode, | |
447 | opendata->owner->so_cred, | |
448 | &opendata->o_res); | |
449 | else | |
450 | nfs_inode_reclaim_delegation(newstate->inode, | |
451 | opendata->owner->so_cred, | |
452 | &opendata->o_res); | |
453 | } | |
454 | nfs4_close_state(newstate, opendata->o_arg.open_flags); | |
455 | } | |
456 | if (newstate != state) | |
457 | return -ESTALE; | |
458 | return 0; | |
459 | } | |
460 | ||
461 | /* | |
462 | * OPEN_RECLAIM: | |
463 | * reclaim state on the server after a reboot. | |
464 | */ | |
465 | static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
466 | { | |
467 | struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; | |
468 | struct nfs4_opendata *opendata; | |
469 | int delegation_type = 0; | |
470 | int status; | |
471 | ||
472 | if (delegation != NULL) { | |
473 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
474 | memcpy(&state->stateid, &delegation->stateid, | |
475 | sizeof(state->stateid)); | |
476 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
477 | return 0; | |
478 | } | |
479 | delegation_type = delegation->type; | |
480 | } | |
481 | opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); | |
482 | if (opendata == NULL) | |
483 | return -ENOMEM; | |
484 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; | |
485 | opendata->o_arg.fh = NFS_FH(state->inode); | |
486 | nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); | |
487 | opendata->o_arg.u.delegation_type = delegation_type; | |
488 | status = nfs4_open_recover(opendata, state); | |
489 | nfs4_opendata_free(opendata); | |
490 | return status; | |
491 | } | |
492 | ||
493 | static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
494 | { | |
495 | struct nfs_server *server = NFS_SERVER(state->inode); | |
496 | struct nfs4_exception exception = { }; | |
497 | int err; | |
498 | do { | |
499 | err = _nfs4_do_open_reclaim(sp, state, dentry); | |
500 | if (err != -NFS4ERR_DELAY) | |
501 | break; | |
502 | nfs4_handle_exception(server, err, &exception); | |
503 | } while (exception.retry); | |
504 | return err; | |
505 | } | |
506 | ||
507 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
508 | { | |
509 | struct nfs_open_context *ctx; | |
510 | int ret; | |
511 | ||
512 | ctx = nfs4_state_find_open_context(state); | |
513 | if (IS_ERR(ctx)) | |
514 | return PTR_ERR(ctx); | |
515 | ret = nfs4_do_open_reclaim(sp, state, ctx->dentry); | |
516 | put_nfs_open_context(ctx); | |
517 | return ret; | |
518 | } | |
519 | ||
520 | static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
521 | { | |
522 | struct nfs4_state_owner *sp = state->owner; | |
523 | struct nfs4_opendata *opendata; | |
524 | int ret; | |
525 | ||
526 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
527 | return 0; | |
528 | opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); | |
529 | if (opendata == NULL) | |
530 | return -ENOMEM; | |
531 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; | |
532 | memcpy(opendata->o_arg.u.delegation.data, state->stateid.data, | |
533 | sizeof(opendata->o_arg.u.delegation.data)); | |
534 | ret = nfs4_open_recover(opendata, state); | |
535 | nfs4_opendata_free(opendata); | |
536 | return ret; | |
537 | } | |
538 | ||
539 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
540 | { | |
541 | struct nfs4_exception exception = { }; | |
542 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
543 | int err; | |
544 | do { | |
545 | err = _nfs4_open_delegation_recall(dentry, state); | |
546 | switch (err) { | |
547 | case 0: | |
548 | return err; | |
549 | case -NFS4ERR_STALE_CLIENTID: | |
550 | case -NFS4ERR_STALE_STATEID: | |
551 | case -NFS4ERR_EXPIRED: | |
552 | /* Don't recall a delegation if it was lost */ | |
553 | nfs4_schedule_state_recovery(server->nfs4_state); | |
554 | return err; | |
555 | } | |
556 | err = nfs4_handle_exception(server, err, &exception); | |
557 | } while (exception.retry); | |
558 | return err; | |
559 | } | |
560 | ||
561 | static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) | |
562 | { | |
563 | struct nfs4_opendata *data = calldata; | |
564 | struct rpc_message msg = { | |
565 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
566 | .rpc_argp = &data->c_arg, | |
567 | .rpc_resp = &data->c_res, | |
568 | .rpc_cred = data->owner->so_cred, | |
569 | }; | |
570 | data->timestamp = jiffies; | |
571 | rpc_call_setup(task, &msg, 0); | |
572 | } | |
573 | ||
574 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
575 | { | |
576 | struct nfs4_opendata *data = calldata; | |
577 | ||
578 | data->rpc_status = task->tk_status; | |
579 | if (RPC_ASSASSINATED(task)) | |
580 | return; | |
581 | if (data->rpc_status == 0) { | |
582 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, | |
583 | sizeof(data->o_res.stateid.data)); | |
584 | renew_lease(data->o_res.server, data->timestamp); | |
585 | } | |
586 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); | |
587 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); | |
588 | } | |
589 | ||
590 | static void nfs4_open_confirm_release(void *calldata) | |
591 | { | |
592 | struct nfs4_opendata *data = calldata; | |
593 | struct nfs4_state *state = NULL; | |
594 | ||
595 | /* If this request hasn't been cancelled, do nothing */ | |
596 | if (data->cancelled == 0) | |
597 | goto out_free; | |
598 | /* In case of error, no cleanup! */ | |
599 | if (data->rpc_status != 0) | |
600 | goto out_free; | |
601 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
602 | state = nfs4_opendata_to_nfs4_state(data); | |
603 | if (state != NULL) | |
604 | nfs4_close_state(state, data->o_arg.open_flags); | |
605 | out_free: | |
606 | nfs4_opendata_free(data); | |
607 | } | |
608 | ||
609 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
610 | .rpc_call_prepare = nfs4_open_confirm_prepare, | |
611 | .rpc_call_done = nfs4_open_confirm_done, | |
612 | .rpc_release = nfs4_open_confirm_release, | |
613 | }; | |
614 | ||
615 | /* | |
616 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
617 | */ | |
618 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
619 | { | |
620 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
621 | struct rpc_task *task; | |
622 | int status; | |
623 | ||
624 | atomic_inc(&data->count); | |
625 | /* | |
626 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
627 | * want to ensure that it takes the 'error' code path. | |
628 | */ | |
629 | data->rpc_status = -ENOMEM; | |
630 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); | |
631 | if (IS_ERR(task)) | |
632 | return PTR_ERR(task); | |
633 | status = nfs4_wait_for_completion_rpc_task(task); | |
634 | if (status != 0) { | |
635 | data->cancelled = 1; | |
636 | smp_wmb(); | |
637 | } else | |
638 | status = data->rpc_status; | |
639 | rpc_release_task(task); | |
640 | return status; | |
641 | } | |
642 | ||
643 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) | |
644 | { | |
645 | struct nfs4_opendata *data = calldata; | |
646 | struct nfs4_state_owner *sp = data->owner; | |
647 | struct rpc_message msg = { | |
648 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
649 | .rpc_argp = &data->o_arg, | |
650 | .rpc_resp = &data->o_res, | |
651 | .rpc_cred = sp->so_cred, | |
652 | }; | |
653 | ||
654 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
655 | return; | |
656 | /* Update sequence id. */ | |
657 | data->o_arg.id = sp->so_id; | |
658 | data->o_arg.clientid = sp->so_client->cl_clientid; | |
659 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) | |
660 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
661 | data->timestamp = jiffies; | |
662 | rpc_call_setup(task, &msg, 0); | |
663 | } | |
664 | ||
665 | static void nfs4_open_done(struct rpc_task *task, void *calldata) | |
666 | { | |
667 | struct nfs4_opendata *data = calldata; | |
668 | ||
669 | data->rpc_status = task->tk_status; | |
670 | if (RPC_ASSASSINATED(task)) | |
671 | return; | |
672 | if (task->tk_status == 0) { | |
673 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
674 | case S_IFREG: | |
675 | break; | |
676 | case S_IFLNK: | |
677 | data->rpc_status = -ELOOP; | |
678 | break; | |
679 | case S_IFDIR: | |
680 | data->rpc_status = -EISDIR; | |
681 | break; | |
682 | default: | |
683 | data->rpc_status = -ENOTDIR; | |
684 | } | |
685 | renew_lease(data->o_res.server, data->timestamp); | |
686 | } | |
687 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); | |
688 | } | |
689 | ||
690 | static void nfs4_open_release(void *calldata) | |
691 | { | |
692 | struct nfs4_opendata *data = calldata; | |
693 | struct nfs4_state *state = NULL; | |
694 | ||
695 | /* If this request hasn't been cancelled, do nothing */ | |
696 | if (data->cancelled == 0) | |
697 | goto out_free; | |
698 | /* In case of error, no cleanup! */ | |
699 | if (data->rpc_status != 0) | |
700 | goto out_free; | |
701 | /* In case we need an open_confirm, no cleanup! */ | |
702 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
703 | goto out_free; | |
704 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
705 | state = nfs4_opendata_to_nfs4_state(data); | |
706 | if (state != NULL) | |
707 | nfs4_close_state(state, data->o_arg.open_flags); | |
708 | out_free: | |
709 | nfs4_opendata_free(data); | |
710 | } | |
711 | ||
712 | static const struct rpc_call_ops nfs4_open_ops = { | |
713 | .rpc_call_prepare = nfs4_open_prepare, | |
714 | .rpc_call_done = nfs4_open_done, | |
715 | .rpc_release = nfs4_open_release, | |
716 | }; | |
717 | ||
718 | /* | |
719 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
720 | */ | |
721 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
722 | { | |
723 | struct inode *dir = data->dir->d_inode; | |
724 | struct nfs_server *server = NFS_SERVER(dir); | |
725 | struct nfs_openargs *o_arg = &data->o_arg; | |
726 | struct nfs_openres *o_res = &data->o_res; | |
727 | struct rpc_task *task; | |
728 | int status; | |
729 | ||
730 | atomic_inc(&data->count); | |
731 | /* | |
732 | * If rpc_run_task() ends up calling ->rpc_release(), we | |
733 | * want to ensure that it takes the 'error' code path. | |
734 | */ | |
735 | data->rpc_status = -ENOMEM; | |
736 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); | |
737 | if (IS_ERR(task)) | |
738 | return PTR_ERR(task); | |
739 | status = nfs4_wait_for_completion_rpc_task(task); | |
740 | if (status != 0) { | |
741 | data->cancelled = 1; | |
742 | smp_wmb(); | |
743 | } else | |
744 | status = data->rpc_status; | |
745 | rpc_release_task(task); | |
746 | if (status != 0) | |
747 | return status; | |
748 | ||
749 | if (o_arg->open_flags & O_CREAT) { | |
750 | update_changeattr(dir, &o_res->cinfo); | |
751 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
752 | } else | |
753 | nfs_refresh_inode(dir, o_res->dir_attr); | |
754 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
755 | status = _nfs4_proc_open_confirm(data); | |
756 | if (status != 0) | |
757 | return status; | |
758 | } | |
759 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
760 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
761 | return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
766 | { | |
767 | struct nfs_access_entry cache; | |
768 | int mask = 0; | |
769 | int status; | |
770 | ||
771 | if (openflags & FMODE_READ) | |
772 | mask |= MAY_READ; | |
773 | if (openflags & FMODE_WRITE) | |
774 | mask |= MAY_WRITE; | |
775 | status = nfs_access_get_cached(inode, cred, &cache); | |
776 | if (status == 0) | |
777 | goto out; | |
778 | ||
779 | /* Be clever: ask server to check for all possible rights */ | |
780 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
781 | cache.cred = cred; | |
782 | cache.jiffies = jiffies; | |
783 | status = _nfs4_proc_access(inode, &cache); | |
784 | if (status != 0) | |
785 | return status; | |
786 | nfs_access_add_cache(inode, &cache); | |
787 | out: | |
788 | if ((cache.mask & mask) == mask) | |
789 | return 0; | |
790 | return -EACCES; | |
791 | } | |
792 | ||
793 | int nfs4_recover_expired_lease(struct nfs_server *server) | |
794 | { | |
795 | struct nfs4_client *clp = server->nfs4_state; | |
796 | ||
797 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
798 | nfs4_schedule_state_recovery(clp); | |
799 | return nfs4_wait_clnt_recover(server->client, clp); | |
800 | } | |
801 | ||
802 | /* | |
803 | * OPEN_EXPIRED: | |
804 | * reclaim state on the server after a network partition. | |
805 | * Assumes caller holds the appropriate lock | |
806 | */ | |
807 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
808 | { | |
809 | struct inode *inode = state->inode; | |
810 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; | |
811 | struct nfs4_opendata *opendata; | |
812 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); | |
813 | int ret; | |
814 | ||
815 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
816 | ret = _nfs4_do_access(inode, sp->so_cred, openflags); | |
817 | if (ret < 0) | |
818 | return ret; | |
819 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); | |
820 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
821 | return 0; | |
822 | } | |
823 | opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL); | |
824 | if (opendata == NULL) | |
825 | return -ENOMEM; | |
826 | ret = nfs4_open_recover(opendata, state); | |
827 | if (ret == -ESTALE) { | |
828 | /* Invalidate the state owner so we don't ever use it again */ | |
829 | nfs4_drop_state_owner(sp); | |
830 | d_drop(dentry); | |
831 | } | |
832 | nfs4_opendata_free(opendata); | |
833 | return ret; | |
834 | } | |
835 | ||
836 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
837 | { | |
838 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
839 | struct nfs4_exception exception = { }; | |
840 | int err; | |
841 | ||
842 | do { | |
843 | err = _nfs4_open_expired(sp, state, dentry); | |
844 | if (err == -NFS4ERR_DELAY) | |
845 | nfs4_handle_exception(server, err, &exception); | |
846 | } while (exception.retry); | |
847 | return err; | |
848 | } | |
849 | ||
850 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
851 | { | |
852 | struct nfs_open_context *ctx; | |
853 | int ret; | |
854 | ||
855 | ctx = nfs4_state_find_open_context(state); | |
856 | if (IS_ERR(ctx)) | |
857 | return PTR_ERR(ctx); | |
858 | ret = nfs4_do_open_expired(sp, state, ctx->dentry); | |
859 | put_nfs_open_context(ctx); | |
860 | return ret; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Returns a referenced nfs4_state if there is an open delegation on the file | |
865 | */ | |
866 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
867 | { | |
868 | struct nfs_delegation *delegation; | |
869 | struct nfs_server *server = NFS_SERVER(inode); | |
870 | struct nfs4_client *clp = server->nfs4_state; | |
871 | struct nfs_inode *nfsi = NFS_I(inode); | |
872 | struct nfs4_state_owner *sp = NULL; | |
873 | struct nfs4_state *state = NULL; | |
874 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
875 | int err; | |
876 | ||
877 | err = -ENOMEM; | |
878 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
879 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
880 | return err; | |
881 | } | |
882 | err = nfs4_recover_expired_lease(server); | |
883 | if (err != 0) | |
884 | goto out_put_state_owner; | |
885 | /* Protect against reboot recovery - NOTE ORDER! */ | |
886 | down_read(&clp->cl_sem); | |
887 | /* Protect against delegation recall */ | |
888 | down_read(&nfsi->rwsem); | |
889 | delegation = NFS_I(inode)->delegation; | |
890 | err = -ENOENT; | |
891 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
892 | goto out_err; | |
893 | err = -ENOMEM; | |
894 | state = nfs4_get_open_state(inode, sp); | |
895 | if (state == NULL) | |
896 | goto out_err; | |
897 | ||
898 | err = -ENOENT; | |
899 | if ((state->state & open_flags) == open_flags) { | |
900 | spin_lock(&inode->i_lock); | |
901 | update_open_stateflags(state, open_flags); | |
902 | spin_unlock(&inode->i_lock); | |
903 | goto out_ok; | |
904 | } else if (state->state != 0) | |
905 | goto out_put_open_state; | |
906 | ||
907 | lock_kernel(); | |
908 | err = _nfs4_do_access(inode, cred, open_flags); | |
909 | unlock_kernel(); | |
910 | if (err != 0) | |
911 | goto out_put_open_state; | |
912 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
913 | update_open_stateid(state, &delegation->stateid, open_flags); | |
914 | out_ok: | |
915 | nfs4_put_state_owner(sp); | |
916 | up_read(&nfsi->rwsem); | |
917 | up_read(&clp->cl_sem); | |
918 | *res = state; | |
919 | return 0; | |
920 | out_put_open_state: | |
921 | nfs4_put_open_state(state); | |
922 | out_err: | |
923 | up_read(&nfsi->rwsem); | |
924 | up_read(&clp->cl_sem); | |
925 | if (err != -EACCES) | |
926 | nfs_inode_return_delegation(inode); | |
927 | out_put_state_owner: | |
928 | nfs4_put_state_owner(sp); | |
929 | return err; | |
930 | } | |
931 | ||
932 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
933 | { | |
934 | struct nfs4_exception exception = { }; | |
935 | struct nfs4_state *res = ERR_PTR(-EIO); | |
936 | int err; | |
937 | ||
938 | do { | |
939 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
940 | if (err == 0) | |
941 | break; | |
942 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
943 | err, &exception)); | |
944 | } while (exception.retry); | |
945 | return res; | |
946 | } | |
947 | ||
948 | /* | |
949 | * Returns a referenced nfs4_state | |
950 | */ | |
951 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
952 | { | |
953 | struct nfs4_state_owner *sp; | |
954 | struct nfs4_state *state = NULL; | |
955 | struct nfs_server *server = NFS_SERVER(dir); | |
956 | struct nfs4_client *clp = server->nfs4_state; | |
957 | struct nfs4_opendata *opendata; | |
958 | int status; | |
959 | ||
960 | /* Protect against reboot recovery conflicts */ | |
961 | status = -ENOMEM; | |
962 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
963 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
964 | goto out_err; | |
965 | } | |
966 | status = nfs4_recover_expired_lease(server); | |
967 | if (status != 0) | |
968 | goto err_put_state_owner; | |
969 | down_read(&clp->cl_sem); | |
970 | status = -ENOMEM; | |
971 | opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr); | |
972 | if (opendata == NULL) | |
973 | goto err_put_state_owner; | |
974 | ||
975 | status = _nfs4_proc_open(opendata); | |
976 | if (status != 0) | |
977 | goto err_opendata_free; | |
978 | ||
979 | status = -ENOMEM; | |
980 | state = nfs4_opendata_to_nfs4_state(opendata); | |
981 | if (state == NULL) | |
982 | goto err_opendata_free; | |
983 | if (opendata->o_res.delegation_type != 0) | |
984 | nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); | |
985 | nfs4_opendata_free(opendata); | |
986 | nfs4_put_state_owner(sp); | |
987 | up_read(&clp->cl_sem); | |
988 | *res = state; | |
989 | return 0; | |
990 | err_opendata_free: | |
991 | nfs4_opendata_free(opendata); | |
992 | err_put_state_owner: | |
993 | nfs4_put_state_owner(sp); | |
994 | out_err: | |
995 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ | |
996 | up_read(&clp->cl_sem); | |
997 | *res = NULL; | |
998 | return status; | |
999 | } | |
1000 | ||
1001 | ||
1002 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
1003 | { | |
1004 | struct nfs4_exception exception = { }; | |
1005 | struct nfs4_state *res; | |
1006 | int status; | |
1007 | ||
1008 | do { | |
1009 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); | |
1010 | if (status == 0) | |
1011 | break; | |
1012 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1013 | * book-keeping w.r.t. state-changing operations | |
1014 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1015 | * It is actually a sign of a bug on the client or on the server. | |
1016 | * | |
1017 | * If we receive a BAD_SEQID error in the particular case of | |
1018 | * doing an OPEN, we assume that nfs_increment_open_seqid() will | |
1019 | * have unhashed the old state_owner for us, and that we can | |
1020 | * therefore safely retry using a new one. We should still warn | |
1021 | * the user though... | |
1022 | */ | |
1023 | if (status == -NFS4ERR_BAD_SEQID) { | |
1024 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
1025 | exception.retry = 1; | |
1026 | continue; | |
1027 | } | |
1028 | /* | |
1029 | * BAD_STATEID on OPEN means that the server cancelled our | |
1030 | * state before it received the OPEN_CONFIRM. | |
1031 | * Recover by retrying the request as per the discussion | |
1032 | * on Page 181 of RFC3530. | |
1033 | */ | |
1034 | if (status == -NFS4ERR_BAD_STATEID) { | |
1035 | exception.retry = 1; | |
1036 | continue; | |
1037 | } | |
1038 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), | |
1039 | status, &exception)); | |
1040 | } while (exception.retry); | |
1041 | return res; | |
1042 | } | |
1043 | ||
1044 | static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, | |
1045 | struct iattr *sattr, struct nfs4_state *state) | |
1046 | { | |
1047 | struct nfs_server *server = NFS_SERVER(inode); | |
1048 | struct nfs_setattrargs arg = { | |
1049 | .fh = NFS_FH(inode), | |
1050 | .iap = sattr, | |
1051 | .server = server, | |
1052 | .bitmask = server->attr_bitmask, | |
1053 | }; | |
1054 | struct nfs_setattrres res = { | |
1055 | .fattr = fattr, | |
1056 | .server = server, | |
1057 | }; | |
1058 | struct rpc_message msg = { | |
1059 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1060 | .rpc_argp = &arg, | |
1061 | .rpc_resp = &res, | |
1062 | }; | |
1063 | unsigned long timestamp = jiffies; | |
1064 | int status; | |
1065 | ||
1066 | nfs_fattr_init(fattr); | |
1067 | ||
1068 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { | |
1069 | /* Use that stateid */ | |
1070 | } else if (state != NULL) { | |
1071 | msg.rpc_cred = state->owner->so_cred; | |
1072 | nfs4_copy_stateid(&arg.stateid, state, current->files); | |
1073 | } else | |
1074 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); | |
1075 | ||
1076 | status = rpc_call_sync(server->client, &msg, 0); | |
1077 | if (status == 0 && state != NULL) | |
1078 | renew_lease(server, timestamp); | |
1079 | return status; | |
1080 | } | |
1081 | ||
1082 | static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr, | |
1083 | struct iattr *sattr, struct nfs4_state *state) | |
1084 | { | |
1085 | struct nfs_server *server = NFS_SERVER(inode); | |
1086 | struct nfs4_exception exception = { }; | |
1087 | int err; | |
1088 | do { | |
1089 | err = nfs4_handle_exception(server, | |
1090 | _nfs4_do_setattr(inode, fattr, sattr, state), | |
1091 | &exception); | |
1092 | } while (exception.retry); | |
1093 | return err; | |
1094 | } | |
1095 | ||
1096 | struct nfs4_closedata { | |
1097 | struct inode *inode; | |
1098 | struct nfs4_state *state; | |
1099 | struct nfs_closeargs arg; | |
1100 | struct nfs_closeres res; | |
1101 | struct nfs_fattr fattr; | |
1102 | unsigned long timestamp; | |
1103 | }; | |
1104 | ||
1105 | static void nfs4_free_closedata(void *data) | |
1106 | { | |
1107 | struct nfs4_closedata *calldata = data; | |
1108 | struct nfs4_state_owner *sp = calldata->state->owner; | |
1109 | ||
1110 | nfs4_put_open_state(calldata->state); | |
1111 | nfs_free_seqid(calldata->arg.seqid); | |
1112 | nfs4_put_state_owner(sp); | |
1113 | kfree(calldata); | |
1114 | } | |
1115 | ||
1116 | static void nfs4_close_done(struct rpc_task *task, void *data) | |
1117 | { | |
1118 | struct nfs4_closedata *calldata = data; | |
1119 | struct nfs4_state *state = calldata->state; | |
1120 | struct nfs_server *server = NFS_SERVER(calldata->inode); | |
1121 | ||
1122 | if (RPC_ASSASSINATED(task)) | |
1123 | return; | |
1124 | /* hmm. we are done with the inode, and in the process of freeing | |
1125 | * the state_owner. we keep this around to process errors | |
1126 | */ | |
1127 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); | |
1128 | switch (task->tk_status) { | |
1129 | case 0: | |
1130 | memcpy(&state->stateid, &calldata->res.stateid, | |
1131 | sizeof(state->stateid)); | |
1132 | renew_lease(server, calldata->timestamp); | |
1133 | break; | |
1134 | case -NFS4ERR_STALE_STATEID: | |
1135 | case -NFS4ERR_EXPIRED: | |
1136 | nfs4_schedule_state_recovery(server->nfs4_state); | |
1137 | break; | |
1138 | default: | |
1139 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
1140 | rpc_restart_call(task); | |
1141 | return; | |
1142 | } | |
1143 | } | |
1144 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); | |
1145 | } | |
1146 | ||
1147 | static void nfs4_close_prepare(struct rpc_task *task, void *data) | |
1148 | { | |
1149 | struct nfs4_closedata *calldata = data; | |
1150 | struct nfs4_state *state = calldata->state; | |
1151 | struct rpc_message msg = { | |
1152 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1153 | .rpc_argp = &calldata->arg, | |
1154 | .rpc_resp = &calldata->res, | |
1155 | .rpc_cred = state->owner->so_cred, | |
1156 | }; | |
1157 | int mode = 0, old_mode; | |
1158 | ||
1159 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
1160 | return; | |
1161 | /* Recalculate the new open mode in case someone reopened the file | |
1162 | * while we were waiting in line to be scheduled. | |
1163 | */ | |
1164 | spin_lock(&state->owner->so_lock); | |
1165 | spin_lock(&calldata->inode->i_lock); | |
1166 | mode = old_mode = state->state; | |
1167 | if (state->n_rdwr == 0) { | |
1168 | if (state->n_rdonly == 0) | |
1169 | mode &= ~FMODE_READ; | |
1170 | if (state->n_wronly == 0) | |
1171 | mode &= ~FMODE_WRITE; | |
1172 | } | |
1173 | nfs4_state_set_mode_locked(state, mode); | |
1174 | spin_unlock(&calldata->inode->i_lock); | |
1175 | spin_unlock(&state->owner->so_lock); | |
1176 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
1177 | /* Note: exit _without_ calling nfs4_close_done */ | |
1178 | task->tk_action = NULL; | |
1179 | return; | |
1180 | } | |
1181 | nfs_fattr_init(calldata->res.fattr); | |
1182 | if (mode != 0) | |
1183 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; | |
1184 | calldata->arg.open_flags = mode; | |
1185 | calldata->timestamp = jiffies; | |
1186 | rpc_call_setup(task, &msg, 0); | |
1187 | } | |
1188 | ||
1189 | static const struct rpc_call_ops nfs4_close_ops = { | |
1190 | .rpc_call_prepare = nfs4_close_prepare, | |
1191 | .rpc_call_done = nfs4_close_done, | |
1192 | .rpc_release = nfs4_free_closedata, | |
1193 | }; | |
1194 | ||
1195 | /* | |
1196 | * It is possible for data to be read/written from a mem-mapped file | |
1197 | * after the sys_close call (which hits the vfs layer as a flush). | |
1198 | * This means that we can't safely call nfsv4 close on a file until | |
1199 | * the inode is cleared. This in turn means that we are not good | |
1200 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1201 | * share state even when we are done with one of the three share | |
1202 | * stateid's in the inode. | |
1203 | * | |
1204 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1205 | */ | |
1206 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state) | |
1207 | { | |
1208 | struct nfs_server *server = NFS_SERVER(inode); | |
1209 | struct nfs4_closedata *calldata; | |
1210 | int status = -ENOMEM; | |
1211 | ||
1212 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); | |
1213 | if (calldata == NULL) | |
1214 | goto out; | |
1215 | calldata->inode = inode; | |
1216 | calldata->state = state; | |
1217 | calldata->arg.fh = NFS_FH(inode); | |
1218 | calldata->arg.stateid = &state->stateid; | |
1219 | /* Serialization for the sequence id */ | |
1220 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); | |
1221 | if (calldata->arg.seqid == NULL) | |
1222 | goto out_free_calldata; | |
1223 | calldata->arg.bitmask = server->attr_bitmask; | |
1224 | calldata->res.fattr = &calldata->fattr; | |
1225 | calldata->res.server = server; | |
1226 | ||
1227 | status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); | |
1228 | if (status == 0) | |
1229 | goto out; | |
1230 | ||
1231 | nfs_free_seqid(calldata->arg.seqid); | |
1232 | out_free_calldata: | |
1233 | kfree(calldata); | |
1234 | out: | |
1235 | return status; | |
1236 | } | |
1237 | ||
1238 | static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) | |
1239 | { | |
1240 | struct file *filp; | |
1241 | ||
1242 | filp = lookup_instantiate_filp(nd, dentry, NULL); | |
1243 | if (!IS_ERR(filp)) { | |
1244 | struct nfs_open_context *ctx; | |
1245 | ctx = (struct nfs_open_context *)filp->private_data; | |
1246 | ctx->state = state; | |
1247 | return 0; | |
1248 | } | |
1249 | nfs4_close_state(state, nd->intent.open.flags); | |
1250 | return PTR_ERR(filp); | |
1251 | } | |
1252 | ||
1253 | struct dentry * | |
1254 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
1255 | { | |
1256 | struct iattr attr; | |
1257 | struct rpc_cred *cred; | |
1258 | struct nfs4_state *state; | |
1259 | struct dentry *res; | |
1260 | ||
1261 | if (nd->flags & LOOKUP_CREATE) { | |
1262 | attr.ia_mode = nd->intent.open.create_mode; | |
1263 | attr.ia_valid = ATTR_MODE; | |
1264 | if (!IS_POSIXACL(dir)) | |
1265 | attr.ia_mode &= ~current->fs->umask; | |
1266 | } else { | |
1267 | attr.ia_valid = 0; | |
1268 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1269 | } | |
1270 | ||
1271 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1272 | if (IS_ERR(cred)) | |
1273 | return (struct dentry *)cred; | |
1274 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); | |
1275 | put_rpccred(cred); | |
1276 | if (IS_ERR(state)) { | |
1277 | if (PTR_ERR(state) == -ENOENT) | |
1278 | d_add(dentry, NULL); | |
1279 | return (struct dentry *)state; | |
1280 | } | |
1281 | res = d_add_unique(dentry, igrab(state->inode)); | |
1282 | if (res != NULL) | |
1283 | dentry = res; | |
1284 | nfs4_intent_set_file(nd, dentry, state); | |
1285 | return res; | |
1286 | } | |
1287 | ||
1288 | int | |
1289 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) | |
1290 | { | |
1291 | struct rpc_cred *cred; | |
1292 | struct nfs4_state *state; | |
1293 | ||
1294 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1295 | if (IS_ERR(cred)) | |
1296 | return PTR_ERR(cred); | |
1297 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1298 | if (IS_ERR(state)) | |
1299 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); | |
1300 | put_rpccred(cred); | |
1301 | if (IS_ERR(state)) { | |
1302 | switch (PTR_ERR(state)) { | |
1303 | case -EPERM: | |
1304 | case -EACCES: | |
1305 | case -EDQUOT: | |
1306 | case -ENOSPC: | |
1307 | case -EROFS: | |
1308 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1309 | return 1; | |
1310 | case -ENOENT: | |
1311 | if (dentry->d_inode == NULL) | |
1312 | return 1; | |
1313 | } | |
1314 | goto out_drop; | |
1315 | } | |
1316 | if (state->inode == dentry->d_inode) { | |
1317 | nfs4_intent_set_file(nd, dentry, state); | |
1318 | return 1; | |
1319 | } | |
1320 | nfs4_close_state(state, openflags); | |
1321 | out_drop: | |
1322 | d_drop(dentry); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | ||
1327 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1328 | { | |
1329 | struct nfs4_server_caps_res res = {}; | |
1330 | struct rpc_message msg = { | |
1331 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1332 | .rpc_argp = fhandle, | |
1333 | .rpc_resp = &res, | |
1334 | }; | |
1335 | int status; | |
1336 | ||
1337 | status = rpc_call_sync(server->client, &msg, 0); | |
1338 | if (status == 0) { | |
1339 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1340 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1341 | server->caps |= NFS_CAP_ACLS; | |
1342 | if (res.has_links != 0) | |
1343 | server->caps |= NFS_CAP_HARDLINKS; | |
1344 | if (res.has_symlinks != 0) | |
1345 | server->caps |= NFS_CAP_SYMLINKS; | |
1346 | server->acl_bitmask = res.acl_bitmask; | |
1347 | } | |
1348 | return status; | |
1349 | } | |
1350 | ||
1351 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1352 | { | |
1353 | struct nfs4_exception exception = { }; | |
1354 | int err; | |
1355 | do { | |
1356 | err = nfs4_handle_exception(server, | |
1357 | _nfs4_server_capabilities(server, fhandle), | |
1358 | &exception); | |
1359 | } while (exception.retry); | |
1360 | return err; | |
1361 | } | |
1362 | ||
1363 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1364 | struct nfs_fsinfo *info) | |
1365 | { | |
1366 | struct nfs4_lookup_root_arg args = { | |
1367 | .bitmask = nfs4_fattr_bitmap, | |
1368 | }; | |
1369 | struct nfs4_lookup_res res = { | |
1370 | .server = server, | |
1371 | .fattr = info->fattr, | |
1372 | .fh = fhandle, | |
1373 | }; | |
1374 | struct rpc_message msg = { | |
1375 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1376 | .rpc_argp = &args, | |
1377 | .rpc_resp = &res, | |
1378 | }; | |
1379 | nfs_fattr_init(info->fattr); | |
1380 | return rpc_call_sync(server->client, &msg, 0); | |
1381 | } | |
1382 | ||
1383 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1384 | struct nfs_fsinfo *info) | |
1385 | { | |
1386 | struct nfs4_exception exception = { }; | |
1387 | int err; | |
1388 | do { | |
1389 | err = nfs4_handle_exception(server, | |
1390 | _nfs4_lookup_root(server, fhandle, info), | |
1391 | &exception); | |
1392 | } while (exception.retry); | |
1393 | return err; | |
1394 | } | |
1395 | ||
1396 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1397 | struct nfs_fsinfo *info) | |
1398 | { | |
1399 | struct nfs_fattr * fattr = info->fattr; | |
1400 | unsigned char * p; | |
1401 | struct qstr q; | |
1402 | struct nfs4_lookup_arg args = { | |
1403 | .dir_fh = fhandle, | |
1404 | .name = &q, | |
1405 | .bitmask = nfs4_fattr_bitmap, | |
1406 | }; | |
1407 | struct nfs4_lookup_res res = { | |
1408 | .server = server, | |
1409 | .fattr = fattr, | |
1410 | .fh = fhandle, | |
1411 | }; | |
1412 | struct rpc_message msg = { | |
1413 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1414 | .rpc_argp = &args, | |
1415 | .rpc_resp = &res, | |
1416 | }; | |
1417 | int status; | |
1418 | ||
1419 | /* | |
1420 | * Now we do a separate LOOKUP for each component of the mount path. | |
1421 | * The LOOKUPs are done separately so that we can conveniently | |
1422 | * catch an ERR_WRONGSEC if it occurs along the way... | |
1423 | */ | |
1424 | status = nfs4_lookup_root(server, fhandle, info); | |
1425 | if (status) | |
1426 | goto out; | |
1427 | ||
1428 | p = server->mnt_path; | |
1429 | for (;;) { | |
1430 | struct nfs4_exception exception = { }; | |
1431 | ||
1432 | while (*p == '/') | |
1433 | p++; | |
1434 | if (!*p) | |
1435 | break; | |
1436 | q.name = p; | |
1437 | while (*p && (*p != '/')) | |
1438 | p++; | |
1439 | q.len = p - q.name; | |
1440 | ||
1441 | do { | |
1442 | nfs_fattr_init(fattr); | |
1443 | status = nfs4_handle_exception(server, | |
1444 | rpc_call_sync(server->client, &msg, 0), | |
1445 | &exception); | |
1446 | } while (exception.retry); | |
1447 | if (status == 0) | |
1448 | continue; | |
1449 | if (status == -ENOENT) { | |
1450 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); | |
1451 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); | |
1452 | } | |
1453 | break; | |
1454 | } | |
1455 | if (status == 0) | |
1456 | status = nfs4_server_capabilities(server, fhandle); | |
1457 | if (status == 0) | |
1458 | status = nfs4_do_fsinfo(server, fhandle, info); | |
1459 | out: | |
1460 | return nfs4_map_errors(status); | |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * Get locations and (maybe) other attributes of a referral. | |
1465 | * Note that we'll actually follow the referral later when | |
1466 | * we detect fsid mismatch in inode revalidation | |
1467 | */ | |
1468 | static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) | |
1469 | { | |
1470 | int status = -ENOMEM; | |
1471 | struct page *page = NULL; | |
1472 | struct nfs4_fs_locations *locations = NULL; | |
1473 | struct dentry dentry = {}; | |
1474 | ||
1475 | page = alloc_page(GFP_KERNEL); | |
1476 | if (page == NULL) | |
1477 | goto out; | |
1478 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1479 | if (locations == NULL) | |
1480 | goto out; | |
1481 | ||
1482 | dentry.d_name.name = name->name; | |
1483 | dentry.d_name.len = name->len; | |
1484 | status = nfs4_proc_fs_locations(dir, &dentry, locations, page); | |
1485 | if (status != 0) | |
1486 | goto out; | |
1487 | /* Make sure server returned a different fsid for the referral */ | |
1488 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
1489 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name); | |
1490 | status = -EIO; | |
1491 | goto out; | |
1492 | } | |
1493 | ||
1494 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1495 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1496 | if (!fattr->mode) | |
1497 | fattr->mode = S_IFDIR; | |
1498 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1499 | out: | |
1500 | if (page) | |
1501 | __free_page(page); | |
1502 | if (locations) | |
1503 | kfree(locations); | |
1504 | return status; | |
1505 | } | |
1506 | ||
1507 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1508 | { | |
1509 | struct nfs4_getattr_arg args = { | |
1510 | .fh = fhandle, | |
1511 | .bitmask = server->attr_bitmask, | |
1512 | }; | |
1513 | struct nfs4_getattr_res res = { | |
1514 | .fattr = fattr, | |
1515 | .server = server, | |
1516 | }; | |
1517 | struct rpc_message msg = { | |
1518 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1519 | .rpc_argp = &args, | |
1520 | .rpc_resp = &res, | |
1521 | }; | |
1522 | ||
1523 | nfs_fattr_init(fattr); | |
1524 | return rpc_call_sync(server->client, &msg, 0); | |
1525 | } | |
1526 | ||
1527 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1528 | { | |
1529 | struct nfs4_exception exception = { }; | |
1530 | int err; | |
1531 | do { | |
1532 | err = nfs4_handle_exception(server, | |
1533 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1534 | &exception); | |
1535 | } while (exception.retry); | |
1536 | return err; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * The file is not closed if it is opened due to the a request to change | |
1541 | * the size of the file. The open call will not be needed once the | |
1542 | * VFS layer lookup-intents are implemented. | |
1543 | * | |
1544 | * Close is called when the inode is destroyed. | |
1545 | * If we haven't opened the file for O_WRONLY, we | |
1546 | * need to in the size_change case to obtain a stateid. | |
1547 | * | |
1548 | * Got race? | |
1549 | * Because OPEN is always done by name in nfsv4, it is | |
1550 | * possible that we opened a different file by the same | |
1551 | * name. We can recognize this race condition, but we | |
1552 | * can't do anything about it besides returning an error. | |
1553 | * | |
1554 | * This will be fixed with VFS changes (lookup-intent). | |
1555 | */ | |
1556 | static int | |
1557 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1558 | struct iattr *sattr) | |
1559 | { | |
1560 | struct rpc_cred *cred; | |
1561 | struct inode *inode = dentry->d_inode; | |
1562 | struct nfs_open_context *ctx; | |
1563 | struct nfs4_state *state = NULL; | |
1564 | int status; | |
1565 | ||
1566 | nfs_fattr_init(fattr); | |
1567 | ||
1568 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); | |
1569 | if (IS_ERR(cred)) | |
1570 | return PTR_ERR(cred); | |
1571 | ||
1572 | /* Search for an existing open(O_WRITE) file */ | |
1573 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1574 | if (ctx != NULL) | |
1575 | state = ctx->state; | |
1576 | ||
1577 | status = nfs4_do_setattr(inode, fattr, sattr, state); | |
1578 | if (status == 0) | |
1579 | nfs_setattr_update_inode(inode, sattr); | |
1580 | if (ctx != NULL) | |
1581 | put_nfs_open_context(ctx); | |
1582 | put_rpccred(cred); | |
1583 | return status; | |
1584 | } | |
1585 | ||
1586 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
1587 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1588 | { | |
1589 | int status; | |
1590 | struct nfs_server *server = NFS_SERVER(dir); | |
1591 | struct nfs4_lookup_arg args = { | |
1592 | .bitmask = server->attr_bitmask, | |
1593 | .dir_fh = NFS_FH(dir), | |
1594 | .name = name, | |
1595 | }; | |
1596 | struct nfs4_lookup_res res = { | |
1597 | .server = server, | |
1598 | .fattr = fattr, | |
1599 | .fh = fhandle, | |
1600 | }; | |
1601 | struct rpc_message msg = { | |
1602 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1603 | .rpc_argp = &args, | |
1604 | .rpc_resp = &res, | |
1605 | }; | |
1606 | ||
1607 | nfs_fattr_init(fattr); | |
1608 | ||
1609 | dprintk("NFS call lookup %s\n", name->name); | |
1610 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1611 | if (status == -NFS4ERR_MOVED) | |
1612 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1613 | dprintk("NFS reply lookup: %d\n", status); | |
1614 | return status; | |
1615 | } | |
1616 | ||
1617 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1618 | { | |
1619 | struct nfs4_exception exception = { }; | |
1620 | int err; | |
1621 | do { | |
1622 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1623 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1624 | &exception); | |
1625 | } while (exception.retry); | |
1626 | return err; | |
1627 | } | |
1628 | ||
1629 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1630 | { | |
1631 | struct nfs4_accessargs args = { | |
1632 | .fh = NFS_FH(inode), | |
1633 | }; | |
1634 | struct nfs4_accessres res = { 0 }; | |
1635 | struct rpc_message msg = { | |
1636 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1637 | .rpc_argp = &args, | |
1638 | .rpc_resp = &res, | |
1639 | .rpc_cred = entry->cred, | |
1640 | }; | |
1641 | int mode = entry->mask; | |
1642 | int status; | |
1643 | ||
1644 | /* | |
1645 | * Determine which access bits we want to ask for... | |
1646 | */ | |
1647 | if (mode & MAY_READ) | |
1648 | args.access |= NFS4_ACCESS_READ; | |
1649 | if (S_ISDIR(inode->i_mode)) { | |
1650 | if (mode & MAY_WRITE) | |
1651 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1652 | if (mode & MAY_EXEC) | |
1653 | args.access |= NFS4_ACCESS_LOOKUP; | |
1654 | } else { | |
1655 | if (mode & MAY_WRITE) | |
1656 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1657 | if (mode & MAY_EXEC) | |
1658 | args.access |= NFS4_ACCESS_EXECUTE; | |
1659 | } | |
1660 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1661 | if (!status) { | |
1662 | entry->mask = 0; | |
1663 | if (res.access & NFS4_ACCESS_READ) | |
1664 | entry->mask |= MAY_READ; | |
1665 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1666 | entry->mask |= MAY_WRITE; | |
1667 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1668 | entry->mask |= MAY_EXEC; | |
1669 | } | |
1670 | return status; | |
1671 | } | |
1672 | ||
1673 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1674 | { | |
1675 | struct nfs4_exception exception = { }; | |
1676 | int err; | |
1677 | do { | |
1678 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1679 | _nfs4_proc_access(inode, entry), | |
1680 | &exception); | |
1681 | } while (exception.retry); | |
1682 | return err; | |
1683 | } | |
1684 | ||
1685 | /* | |
1686 | * TODO: For the time being, we don't try to get any attributes | |
1687 | * along with any of the zero-copy operations READ, READDIR, | |
1688 | * READLINK, WRITE. | |
1689 | * | |
1690 | * In the case of the first three, we want to put the GETATTR | |
1691 | * after the read-type operation -- this is because it is hard | |
1692 | * to predict the length of a GETATTR response in v4, and thus | |
1693 | * align the READ data correctly. This means that the GETATTR | |
1694 | * may end up partially falling into the page cache, and we should | |
1695 | * shift it into the 'tail' of the xdr_buf before processing. | |
1696 | * To do this efficiently, we need to know the total length | |
1697 | * of data received, which doesn't seem to be available outside | |
1698 | * of the RPC layer. | |
1699 | * | |
1700 | * In the case of WRITE, we also want to put the GETATTR after | |
1701 | * the operation -- in this case because we want to make sure | |
1702 | * we get the post-operation mtime and size. This means that | |
1703 | * we can't use xdr_encode_pages() as written: we need a variant | |
1704 | * of it which would leave room in the 'tail' iovec. | |
1705 | * | |
1706 | * Both of these changes to the XDR layer would in fact be quite | |
1707 | * minor, but I decided to leave them for a subsequent patch. | |
1708 | */ | |
1709 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1710 | unsigned int pgbase, unsigned int pglen) | |
1711 | { | |
1712 | struct nfs4_readlink args = { | |
1713 | .fh = NFS_FH(inode), | |
1714 | .pgbase = pgbase, | |
1715 | .pglen = pglen, | |
1716 | .pages = &page, | |
1717 | }; | |
1718 | struct rpc_message msg = { | |
1719 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1720 | .rpc_argp = &args, | |
1721 | .rpc_resp = NULL, | |
1722 | }; | |
1723 | ||
1724 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1725 | } | |
1726 | ||
1727 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1728 | unsigned int pgbase, unsigned int pglen) | |
1729 | { | |
1730 | struct nfs4_exception exception = { }; | |
1731 | int err; | |
1732 | do { | |
1733 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1734 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1735 | &exception); | |
1736 | } while (exception.retry); | |
1737 | return err; | |
1738 | } | |
1739 | ||
1740 | static int _nfs4_proc_read(struct nfs_read_data *rdata) | |
1741 | { | |
1742 | int flags = rdata->flags; | |
1743 | struct inode *inode = rdata->inode; | |
1744 | struct nfs_fattr *fattr = rdata->res.fattr; | |
1745 | struct nfs_server *server = NFS_SERVER(inode); | |
1746 | struct rpc_message msg = { | |
1747 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
1748 | .rpc_argp = &rdata->args, | |
1749 | .rpc_resp = &rdata->res, | |
1750 | .rpc_cred = rdata->cred, | |
1751 | }; | |
1752 | unsigned long timestamp = jiffies; | |
1753 | int status; | |
1754 | ||
1755 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
1756 | (long long) rdata->args.offset); | |
1757 | ||
1758 | nfs_fattr_init(fattr); | |
1759 | status = rpc_call_sync(server->client, &msg, flags); | |
1760 | if (!status) | |
1761 | renew_lease(server, timestamp); | |
1762 | dprintk("NFS reply read: %d\n", status); | |
1763 | return status; | |
1764 | } | |
1765 | ||
1766 | static int nfs4_proc_read(struct nfs_read_data *rdata) | |
1767 | { | |
1768 | struct nfs4_exception exception = { }; | |
1769 | int err; | |
1770 | do { | |
1771 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), | |
1772 | _nfs4_proc_read(rdata), | |
1773 | &exception); | |
1774 | } while (exception.retry); | |
1775 | return err; | |
1776 | } | |
1777 | ||
1778 | static int _nfs4_proc_write(struct nfs_write_data *wdata) | |
1779 | { | |
1780 | int rpcflags = wdata->flags; | |
1781 | struct inode *inode = wdata->inode; | |
1782 | struct nfs_fattr *fattr = wdata->res.fattr; | |
1783 | struct nfs_server *server = NFS_SERVER(inode); | |
1784 | struct rpc_message msg = { | |
1785 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
1786 | .rpc_argp = &wdata->args, | |
1787 | .rpc_resp = &wdata->res, | |
1788 | .rpc_cred = wdata->cred, | |
1789 | }; | |
1790 | int status; | |
1791 | ||
1792 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
1793 | (long long) wdata->args.offset); | |
1794 | ||
1795 | wdata->args.bitmask = server->attr_bitmask; | |
1796 | wdata->res.server = server; | |
1797 | wdata->timestamp = jiffies; | |
1798 | nfs_fattr_init(fattr); | |
1799 | status = rpc_call_sync(server->client, &msg, rpcflags); | |
1800 | dprintk("NFS reply write: %d\n", status); | |
1801 | if (status < 0) | |
1802 | return status; | |
1803 | renew_lease(server, wdata->timestamp); | |
1804 | nfs_post_op_update_inode(inode, fattr); | |
1805 | return wdata->res.count; | |
1806 | } | |
1807 | ||
1808 | static int nfs4_proc_write(struct nfs_write_data *wdata) | |
1809 | { | |
1810 | struct nfs4_exception exception = { }; | |
1811 | int err; | |
1812 | do { | |
1813 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), | |
1814 | _nfs4_proc_write(wdata), | |
1815 | &exception); | |
1816 | } while (exception.retry); | |
1817 | return err; | |
1818 | } | |
1819 | ||
1820 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) | |
1821 | { | |
1822 | struct inode *inode = cdata->inode; | |
1823 | struct nfs_fattr *fattr = cdata->res.fattr; | |
1824 | struct nfs_server *server = NFS_SERVER(inode); | |
1825 | struct rpc_message msg = { | |
1826 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
1827 | .rpc_argp = &cdata->args, | |
1828 | .rpc_resp = &cdata->res, | |
1829 | .rpc_cred = cdata->cred, | |
1830 | }; | |
1831 | int status; | |
1832 | ||
1833 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
1834 | (long long) cdata->args.offset); | |
1835 | ||
1836 | cdata->args.bitmask = server->attr_bitmask; | |
1837 | cdata->res.server = server; | |
1838 | cdata->timestamp = jiffies; | |
1839 | nfs_fattr_init(fattr); | |
1840 | status = rpc_call_sync(server->client, &msg, 0); | |
1841 | if (status >= 0) | |
1842 | renew_lease(server, cdata->timestamp); | |
1843 | dprintk("NFS reply commit: %d\n", status); | |
1844 | if (status >= 0) | |
1845 | nfs_post_op_update_inode(inode, fattr); | |
1846 | return status; | |
1847 | } | |
1848 | ||
1849 | static int nfs4_proc_commit(struct nfs_write_data *cdata) | |
1850 | { | |
1851 | struct nfs4_exception exception = { }; | |
1852 | int err; | |
1853 | do { | |
1854 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), | |
1855 | _nfs4_proc_commit(cdata), | |
1856 | &exception); | |
1857 | } while (exception.retry); | |
1858 | return err; | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * Got race? | |
1863 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1864 | * Until then, this create/open method is prone to inefficiency and race | |
1865 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1866 | * placed on the wire. | |
1867 | * | |
1868 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1869 | * The file will be opened again in the subsequent VFS open call | |
1870 | * (nfs4_proc_file_open). | |
1871 | * | |
1872 | * The open for read will just hang around to be used by any process that | |
1873 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1874 | */ | |
1875 | ||
1876 | static int | |
1877 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
1878 | int flags, struct nameidata *nd) | |
1879 | { | |
1880 | struct nfs4_state *state; | |
1881 | struct rpc_cred *cred; | |
1882 | int status = 0; | |
1883 | ||
1884 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1885 | if (IS_ERR(cred)) { | |
1886 | status = PTR_ERR(cred); | |
1887 | goto out; | |
1888 | } | |
1889 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); | |
1890 | put_rpccred(cred); | |
1891 | if (IS_ERR(state)) { | |
1892 | status = PTR_ERR(state); | |
1893 | goto out; | |
1894 | } | |
1895 | d_instantiate(dentry, igrab(state->inode)); | |
1896 | if (flags & O_EXCL) { | |
1897 | struct nfs_fattr fattr; | |
1898 | status = nfs4_do_setattr(state->inode, &fattr, sattr, state); | |
1899 | if (status == 0) | |
1900 | nfs_setattr_update_inode(state->inode, sattr); | |
1901 | } | |
1902 | if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) | |
1903 | status = nfs4_intent_set_file(nd, dentry, state); | |
1904 | else | |
1905 | nfs4_close_state(state, flags); | |
1906 | out: | |
1907 | return status; | |
1908 | } | |
1909 | ||
1910 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1911 | { | |
1912 | struct nfs_server *server = NFS_SERVER(dir); | |
1913 | struct nfs4_remove_arg args = { | |
1914 | .fh = NFS_FH(dir), | |
1915 | .name = name, | |
1916 | .bitmask = server->attr_bitmask, | |
1917 | }; | |
1918 | struct nfs_fattr dir_attr; | |
1919 | struct nfs4_remove_res res = { | |
1920 | .server = server, | |
1921 | .dir_attr = &dir_attr, | |
1922 | }; | |
1923 | struct rpc_message msg = { | |
1924 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1925 | .rpc_argp = &args, | |
1926 | .rpc_resp = &res, | |
1927 | }; | |
1928 | int status; | |
1929 | ||
1930 | nfs_fattr_init(res.dir_attr); | |
1931 | status = rpc_call_sync(server->client, &msg, 0); | |
1932 | if (status == 0) { | |
1933 | update_changeattr(dir, &res.cinfo); | |
1934 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1935 | } | |
1936 | return status; | |
1937 | } | |
1938 | ||
1939 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1940 | { | |
1941 | struct nfs4_exception exception = { }; | |
1942 | int err; | |
1943 | do { | |
1944 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1945 | _nfs4_proc_remove(dir, name), | |
1946 | &exception); | |
1947 | } while (exception.retry); | |
1948 | return err; | |
1949 | } | |
1950 | ||
1951 | struct unlink_desc { | |
1952 | struct nfs4_remove_arg args; | |
1953 | struct nfs4_remove_res res; | |
1954 | struct nfs_fattr dir_attr; | |
1955 | }; | |
1956 | ||
1957 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1958 | struct qstr *name) | |
1959 | { | |
1960 | struct nfs_server *server = NFS_SERVER(dir->d_inode); | |
1961 | struct unlink_desc *up; | |
1962 | ||
1963 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); | |
1964 | if (!up) | |
1965 | return -ENOMEM; | |
1966 | ||
1967 | up->args.fh = NFS_FH(dir->d_inode); | |
1968 | up->args.name = name; | |
1969 | up->args.bitmask = server->attr_bitmask; | |
1970 | up->res.server = server; | |
1971 | up->res.dir_attr = &up->dir_attr; | |
1972 | ||
1973 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1974 | msg->rpc_argp = &up->args; | |
1975 | msg->rpc_resp = &up->res; | |
1976 | return 0; | |
1977 | } | |
1978 | ||
1979 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1980 | { | |
1981 | struct rpc_message *msg = &task->tk_msg; | |
1982 | struct unlink_desc *up; | |
1983 | ||
1984 | if (msg->rpc_resp != NULL) { | |
1985 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
1986 | update_changeattr(dir->d_inode, &up->res.cinfo); | |
1987 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1988 | kfree(up); | |
1989 | msg->rpc_resp = NULL; | |
1990 | msg->rpc_argp = NULL; | |
1991 | } | |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1996 | struct inode *new_dir, struct qstr *new_name) | |
1997 | { | |
1998 | struct nfs_server *server = NFS_SERVER(old_dir); | |
1999 | struct nfs4_rename_arg arg = { | |
2000 | .old_dir = NFS_FH(old_dir), | |
2001 | .new_dir = NFS_FH(new_dir), | |
2002 | .old_name = old_name, | |
2003 | .new_name = new_name, | |
2004 | .bitmask = server->attr_bitmask, | |
2005 | }; | |
2006 | struct nfs_fattr old_fattr, new_fattr; | |
2007 | struct nfs4_rename_res res = { | |
2008 | .server = server, | |
2009 | .old_fattr = &old_fattr, | |
2010 | .new_fattr = &new_fattr, | |
2011 | }; | |
2012 | struct rpc_message msg = { | |
2013 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2014 | .rpc_argp = &arg, | |
2015 | .rpc_resp = &res, | |
2016 | }; | |
2017 | int status; | |
2018 | ||
2019 | nfs_fattr_init(res.old_fattr); | |
2020 | nfs_fattr_init(res.new_fattr); | |
2021 | status = rpc_call_sync(server->client, &msg, 0); | |
2022 | ||
2023 | if (!status) { | |
2024 | update_changeattr(old_dir, &res.old_cinfo); | |
2025 | nfs_post_op_update_inode(old_dir, res.old_fattr); | |
2026 | update_changeattr(new_dir, &res.new_cinfo); | |
2027 | nfs_post_op_update_inode(new_dir, res.new_fattr); | |
2028 | } | |
2029 | return status; | |
2030 | } | |
2031 | ||
2032 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2033 | struct inode *new_dir, struct qstr *new_name) | |
2034 | { | |
2035 | struct nfs4_exception exception = { }; | |
2036 | int err; | |
2037 | do { | |
2038 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2039 | _nfs4_proc_rename(old_dir, old_name, | |
2040 | new_dir, new_name), | |
2041 | &exception); | |
2042 | } while (exception.retry); | |
2043 | return err; | |
2044 | } | |
2045 | ||
2046 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2047 | { | |
2048 | struct nfs_server *server = NFS_SERVER(inode); | |
2049 | struct nfs4_link_arg arg = { | |
2050 | .fh = NFS_FH(inode), | |
2051 | .dir_fh = NFS_FH(dir), | |
2052 | .name = name, | |
2053 | .bitmask = server->attr_bitmask, | |
2054 | }; | |
2055 | struct nfs_fattr fattr, dir_attr; | |
2056 | struct nfs4_link_res res = { | |
2057 | .server = server, | |
2058 | .fattr = &fattr, | |
2059 | .dir_attr = &dir_attr, | |
2060 | }; | |
2061 | struct rpc_message msg = { | |
2062 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2063 | .rpc_argp = &arg, | |
2064 | .rpc_resp = &res, | |
2065 | }; | |
2066 | int status; | |
2067 | ||
2068 | nfs_fattr_init(res.fattr); | |
2069 | nfs_fattr_init(res.dir_attr); | |
2070 | status = rpc_call_sync(server->client, &msg, 0); | |
2071 | if (!status) { | |
2072 | update_changeattr(dir, &res.cinfo); | |
2073 | nfs_post_op_update_inode(dir, res.dir_attr); | |
2074 | nfs_post_op_update_inode(inode, res.fattr); | |
2075 | } | |
2076 | ||
2077 | return status; | |
2078 | } | |
2079 | ||
2080 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2081 | { | |
2082 | struct nfs4_exception exception = { }; | |
2083 | int err; | |
2084 | do { | |
2085 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2086 | _nfs4_proc_link(inode, dir, name), | |
2087 | &exception); | |
2088 | } while (exception.retry); | |
2089 | return err; | |
2090 | } | |
2091 | ||
2092 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
2093 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
2094 | struct nfs_fattr *fattr) | |
2095 | { | |
2096 | struct nfs_server *server = NFS_SERVER(dir); | |
2097 | struct nfs_fattr dir_fattr; | |
2098 | struct nfs4_create_arg arg = { | |
2099 | .dir_fh = NFS_FH(dir), | |
2100 | .server = server, | |
2101 | .name = name, | |
2102 | .attrs = sattr, | |
2103 | .ftype = NF4LNK, | |
2104 | .bitmask = server->attr_bitmask, | |
2105 | }; | |
2106 | struct nfs4_create_res res = { | |
2107 | .server = server, | |
2108 | .fh = fhandle, | |
2109 | .fattr = fattr, | |
2110 | .dir_fattr = &dir_fattr, | |
2111 | }; | |
2112 | struct rpc_message msg = { | |
2113 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
2114 | .rpc_argp = &arg, | |
2115 | .rpc_resp = &res, | |
2116 | }; | |
2117 | int status; | |
2118 | ||
2119 | if (path->len > NFS4_MAXPATHLEN) | |
2120 | return -ENAMETOOLONG; | |
2121 | arg.u.symlink = path; | |
2122 | nfs_fattr_init(fattr); | |
2123 | nfs_fattr_init(&dir_fattr); | |
2124 | ||
2125 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2126 | if (!status) | |
2127 | update_changeattr(dir, &res.dir_cinfo); | |
2128 | nfs_post_op_update_inode(dir, res.dir_fattr); | |
2129 | return status; | |
2130 | } | |
2131 | ||
2132 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
2133 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
2134 | struct nfs_fattr *fattr) | |
2135 | { | |
2136 | struct nfs4_exception exception = { }; | |
2137 | int err; | |
2138 | do { | |
2139 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2140 | _nfs4_proc_symlink(dir, name, path, sattr, | |
2141 | fhandle, fattr), | |
2142 | &exception); | |
2143 | } while (exception.retry); | |
2144 | return err; | |
2145 | } | |
2146 | ||
2147 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2148 | struct iattr *sattr) | |
2149 | { | |
2150 | struct nfs_server *server = NFS_SERVER(dir); | |
2151 | struct nfs_fh fhandle; | |
2152 | struct nfs_fattr fattr, dir_fattr; | |
2153 | struct nfs4_create_arg arg = { | |
2154 | .dir_fh = NFS_FH(dir), | |
2155 | .server = server, | |
2156 | .name = &dentry->d_name, | |
2157 | .attrs = sattr, | |
2158 | .ftype = NF4DIR, | |
2159 | .bitmask = server->attr_bitmask, | |
2160 | }; | |
2161 | struct nfs4_create_res res = { | |
2162 | .server = server, | |
2163 | .fh = &fhandle, | |
2164 | .fattr = &fattr, | |
2165 | .dir_fattr = &dir_fattr, | |
2166 | }; | |
2167 | struct rpc_message msg = { | |
2168 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2169 | .rpc_argp = &arg, | |
2170 | .rpc_resp = &res, | |
2171 | }; | |
2172 | int status; | |
2173 | ||
2174 | nfs_fattr_init(&fattr); | |
2175 | nfs_fattr_init(&dir_fattr); | |
2176 | ||
2177 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2178 | if (!status) { | |
2179 | update_changeattr(dir, &res.dir_cinfo); | |
2180 | nfs_post_op_update_inode(dir, res.dir_fattr); | |
2181 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
2182 | } | |
2183 | return status; | |
2184 | } | |
2185 | ||
2186 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2187 | struct iattr *sattr) | |
2188 | { | |
2189 | struct nfs4_exception exception = { }; | |
2190 | int err; | |
2191 | do { | |
2192 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2193 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2194 | &exception); | |
2195 | } while (exception.retry); | |
2196 | return err; | |
2197 | } | |
2198 | ||
2199 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2200 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2201 | { | |
2202 | struct inode *dir = dentry->d_inode; | |
2203 | struct nfs4_readdir_arg args = { | |
2204 | .fh = NFS_FH(dir), | |
2205 | .pages = &page, | |
2206 | .pgbase = 0, | |
2207 | .count = count, | |
2208 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2209 | }; | |
2210 | struct nfs4_readdir_res res; | |
2211 | struct rpc_message msg = { | |
2212 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2213 | .rpc_argp = &args, | |
2214 | .rpc_resp = &res, | |
2215 | .rpc_cred = cred, | |
2216 | }; | |
2217 | int status; | |
2218 | ||
2219 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, | |
2220 | dentry->d_parent->d_name.name, | |
2221 | dentry->d_name.name, | |
2222 | (unsigned long long)cookie); | |
2223 | lock_kernel(); | |
2224 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
2225 | res.pgbase = args.pgbase; | |
2226 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2227 | if (status == 0) | |
2228 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
2229 | unlock_kernel(); | |
2230 | dprintk("%s: returns %d\n", __FUNCTION__, status); | |
2231 | return status; | |
2232 | } | |
2233 | ||
2234 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2235 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2236 | { | |
2237 | struct nfs4_exception exception = { }; | |
2238 | int err; | |
2239 | do { | |
2240 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2241 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2242 | page, count, plus), | |
2243 | &exception); | |
2244 | } while (exception.retry); | |
2245 | return err; | |
2246 | } | |
2247 | ||
2248 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2249 | struct iattr *sattr, dev_t rdev) | |
2250 | { | |
2251 | struct nfs_server *server = NFS_SERVER(dir); | |
2252 | struct nfs_fh fh; | |
2253 | struct nfs_fattr fattr, dir_fattr; | |
2254 | struct nfs4_create_arg arg = { | |
2255 | .dir_fh = NFS_FH(dir), | |
2256 | .server = server, | |
2257 | .name = &dentry->d_name, | |
2258 | .attrs = sattr, | |
2259 | .bitmask = server->attr_bitmask, | |
2260 | }; | |
2261 | struct nfs4_create_res res = { | |
2262 | .server = server, | |
2263 | .fh = &fh, | |
2264 | .fattr = &fattr, | |
2265 | .dir_fattr = &dir_fattr, | |
2266 | }; | |
2267 | struct rpc_message msg = { | |
2268 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2269 | .rpc_argp = &arg, | |
2270 | .rpc_resp = &res, | |
2271 | }; | |
2272 | int status; | |
2273 | int mode = sattr->ia_mode; | |
2274 | ||
2275 | nfs_fattr_init(&fattr); | |
2276 | nfs_fattr_init(&dir_fattr); | |
2277 | ||
2278 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2279 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2280 | if (S_ISFIFO(mode)) | |
2281 | arg.ftype = NF4FIFO; | |
2282 | else if (S_ISBLK(mode)) { | |
2283 | arg.ftype = NF4BLK; | |
2284 | arg.u.device.specdata1 = MAJOR(rdev); | |
2285 | arg.u.device.specdata2 = MINOR(rdev); | |
2286 | } | |
2287 | else if (S_ISCHR(mode)) { | |
2288 | arg.ftype = NF4CHR; | |
2289 | arg.u.device.specdata1 = MAJOR(rdev); | |
2290 | arg.u.device.specdata2 = MINOR(rdev); | |
2291 | } | |
2292 | else | |
2293 | arg.ftype = NF4SOCK; | |
2294 | ||
2295 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2296 | if (status == 0) { | |
2297 | update_changeattr(dir, &res.dir_cinfo); | |
2298 | nfs_post_op_update_inode(dir, res.dir_fattr); | |
2299 | status = nfs_instantiate(dentry, &fh, &fattr); | |
2300 | } | |
2301 | return status; | |
2302 | } | |
2303 | ||
2304 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2305 | struct iattr *sattr, dev_t rdev) | |
2306 | { | |
2307 | struct nfs4_exception exception = { }; | |
2308 | int err; | |
2309 | do { | |
2310 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2311 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2312 | &exception); | |
2313 | } while (exception.retry); | |
2314 | return err; | |
2315 | } | |
2316 | ||
2317 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2318 | struct nfs_fsstat *fsstat) | |
2319 | { | |
2320 | struct nfs4_statfs_arg args = { | |
2321 | .fh = fhandle, | |
2322 | .bitmask = server->attr_bitmask, | |
2323 | }; | |
2324 | struct rpc_message msg = { | |
2325 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2326 | .rpc_argp = &args, | |
2327 | .rpc_resp = fsstat, | |
2328 | }; | |
2329 | ||
2330 | nfs_fattr_init(fsstat->fattr); | |
2331 | return rpc_call_sync(server->client, &msg, 0); | |
2332 | } | |
2333 | ||
2334 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2335 | { | |
2336 | struct nfs4_exception exception = { }; | |
2337 | int err; | |
2338 | do { | |
2339 | err = nfs4_handle_exception(server, | |
2340 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2341 | &exception); | |
2342 | } while (exception.retry); | |
2343 | return err; | |
2344 | } | |
2345 | ||
2346 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2347 | struct nfs_fsinfo *fsinfo) | |
2348 | { | |
2349 | struct nfs4_fsinfo_arg args = { | |
2350 | .fh = fhandle, | |
2351 | .bitmask = server->attr_bitmask, | |
2352 | }; | |
2353 | struct rpc_message msg = { | |
2354 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2355 | .rpc_argp = &args, | |
2356 | .rpc_resp = fsinfo, | |
2357 | }; | |
2358 | ||
2359 | return rpc_call_sync(server->client, &msg, 0); | |
2360 | } | |
2361 | ||
2362 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2363 | { | |
2364 | struct nfs4_exception exception = { }; | |
2365 | int err; | |
2366 | ||
2367 | do { | |
2368 | err = nfs4_handle_exception(server, | |
2369 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2370 | &exception); | |
2371 | } while (exception.retry); | |
2372 | return err; | |
2373 | } | |
2374 | ||
2375 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2376 | { | |
2377 | nfs_fattr_init(fsinfo->fattr); | |
2378 | return nfs4_do_fsinfo(server, fhandle, fsinfo); | |
2379 | } | |
2380 | ||
2381 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2382 | struct nfs_pathconf *pathconf) | |
2383 | { | |
2384 | struct nfs4_pathconf_arg args = { | |
2385 | .fh = fhandle, | |
2386 | .bitmask = server->attr_bitmask, | |
2387 | }; | |
2388 | struct rpc_message msg = { | |
2389 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2390 | .rpc_argp = &args, | |
2391 | .rpc_resp = pathconf, | |
2392 | }; | |
2393 | ||
2394 | /* None of the pathconf attributes are mandatory to implement */ | |
2395 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2396 | memset(pathconf, 0, sizeof(*pathconf)); | |
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | nfs_fattr_init(pathconf->fattr); | |
2401 | return rpc_call_sync(server->client, &msg, 0); | |
2402 | } | |
2403 | ||
2404 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2405 | struct nfs_pathconf *pathconf) | |
2406 | { | |
2407 | struct nfs4_exception exception = { }; | |
2408 | int err; | |
2409 | ||
2410 | do { | |
2411 | err = nfs4_handle_exception(server, | |
2412 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2413 | &exception); | |
2414 | } while (exception.retry); | |
2415 | return err; | |
2416 | } | |
2417 | ||
2418 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) | |
2419 | { | |
2420 | struct nfs_server *server = NFS_SERVER(data->inode); | |
2421 | ||
2422 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
2423 | rpc_restart_call(task); | |
2424 | return -EAGAIN; | |
2425 | } | |
2426 | if (task->tk_status > 0) | |
2427 | renew_lease(server, data->timestamp); | |
2428 | return 0; | |
2429 | } | |
2430 | ||
2431 | static void nfs4_proc_read_setup(struct nfs_read_data *data) | |
2432 | { | |
2433 | struct rpc_message msg = { | |
2434 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2435 | .rpc_argp = &data->args, | |
2436 | .rpc_resp = &data->res, | |
2437 | .rpc_cred = data->cred, | |
2438 | }; | |
2439 | ||
2440 | data->timestamp = jiffies; | |
2441 | ||
2442 | rpc_call_setup(&data->task, &msg, 0); | |
2443 | } | |
2444 | ||
2445 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) | |
2446 | { | |
2447 | struct inode *inode = data->inode; | |
2448 | ||
2449 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2450 | rpc_restart_call(task); | |
2451 | return -EAGAIN; | |
2452 | } | |
2453 | if (task->tk_status >= 0) { | |
2454 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2455 | nfs_post_op_update_inode(inode, data->res.fattr); | |
2456 | } | |
2457 | return 0; | |
2458 | } | |
2459 | ||
2460 | static void nfs4_proc_write_setup(struct nfs_write_data *data, int how) | |
2461 | { | |
2462 | struct rpc_message msg = { | |
2463 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2464 | .rpc_argp = &data->args, | |
2465 | .rpc_resp = &data->res, | |
2466 | .rpc_cred = data->cred, | |
2467 | }; | |
2468 | struct inode *inode = data->inode; | |
2469 | struct nfs_server *server = NFS_SERVER(inode); | |
2470 | int stable; | |
2471 | ||
2472 | if (how & FLUSH_STABLE) { | |
2473 | if (!NFS_I(inode)->ncommit) | |
2474 | stable = NFS_FILE_SYNC; | |
2475 | else | |
2476 | stable = NFS_DATA_SYNC; | |
2477 | } else | |
2478 | stable = NFS_UNSTABLE; | |
2479 | data->args.stable = stable; | |
2480 | data->args.bitmask = server->attr_bitmask; | |
2481 | data->res.server = server; | |
2482 | ||
2483 | data->timestamp = jiffies; | |
2484 | ||
2485 | /* Finalize the task. */ | |
2486 | rpc_call_setup(&data->task, &msg, 0); | |
2487 | } | |
2488 | ||
2489 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) | |
2490 | { | |
2491 | struct inode *inode = data->inode; | |
2492 | ||
2493 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2494 | rpc_restart_call(task); | |
2495 | return -EAGAIN; | |
2496 | } | |
2497 | if (task->tk_status >= 0) | |
2498 | nfs_post_op_update_inode(inode, data->res.fattr); | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how) | |
2503 | { | |
2504 | struct rpc_message msg = { | |
2505 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2506 | .rpc_argp = &data->args, | |
2507 | .rpc_resp = &data->res, | |
2508 | .rpc_cred = data->cred, | |
2509 | }; | |
2510 | struct nfs_server *server = NFS_SERVER(data->inode); | |
2511 | ||
2512 | data->args.bitmask = server->attr_bitmask; | |
2513 | data->res.server = server; | |
2514 | ||
2515 | rpc_call_setup(&data->task, &msg, 0); | |
2516 | } | |
2517 | ||
2518 | /* | |
2519 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2520 | * standalone procedure for queueing an asynchronous RENEW. | |
2521 | */ | |
2522 | static void nfs4_renew_done(struct rpc_task *task, void *data) | |
2523 | { | |
2524 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; | |
2525 | unsigned long timestamp = (unsigned long)data; | |
2526 | ||
2527 | if (task->tk_status < 0) { | |
2528 | switch (task->tk_status) { | |
2529 | case -NFS4ERR_STALE_CLIENTID: | |
2530 | case -NFS4ERR_EXPIRED: | |
2531 | case -NFS4ERR_CB_PATH_DOWN: | |
2532 | nfs4_schedule_state_recovery(clp); | |
2533 | } | |
2534 | return; | |
2535 | } | |
2536 | spin_lock(&clp->cl_lock); | |
2537 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2538 | clp->cl_last_renewal = timestamp; | |
2539 | spin_unlock(&clp->cl_lock); | |
2540 | } | |
2541 | ||
2542 | static const struct rpc_call_ops nfs4_renew_ops = { | |
2543 | .rpc_call_done = nfs4_renew_done, | |
2544 | }; | |
2545 | ||
2546 | int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred) | |
2547 | { | |
2548 | struct rpc_message msg = { | |
2549 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2550 | .rpc_argp = clp, | |
2551 | .rpc_cred = cred, | |
2552 | }; | |
2553 | ||
2554 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
2555 | &nfs4_renew_ops, (void *)jiffies); | |
2556 | } | |
2557 | ||
2558 | int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred) | |
2559 | { | |
2560 | struct rpc_message msg = { | |
2561 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2562 | .rpc_argp = clp, | |
2563 | .rpc_cred = cred, | |
2564 | }; | |
2565 | unsigned long now = jiffies; | |
2566 | int status; | |
2567 | ||
2568 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2569 | if (status < 0) | |
2570 | return status; | |
2571 | spin_lock(&clp->cl_lock); | |
2572 | if (time_before(clp->cl_last_renewal,now)) | |
2573 | clp->cl_last_renewal = now; | |
2574 | spin_unlock(&clp->cl_lock); | |
2575 | return 0; | |
2576 | } | |
2577 | ||
2578 | static inline int nfs4_server_supports_acls(struct nfs_server *server) | |
2579 | { | |
2580 | return (server->caps & NFS_CAP_ACLS) | |
2581 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2582 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2583 | } | |
2584 | ||
2585 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2586 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2587 | * the stack. | |
2588 | */ | |
2589 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2590 | ||
2591 | static void buf_to_pages(const void *buf, size_t buflen, | |
2592 | struct page **pages, unsigned int *pgbase) | |
2593 | { | |
2594 | const void *p = buf; | |
2595 | ||
2596 | *pgbase = offset_in_page(buf); | |
2597 | p -= *pgbase; | |
2598 | while (p < buf + buflen) { | |
2599 | *(pages++) = virt_to_page(p); | |
2600 | p += PAGE_CACHE_SIZE; | |
2601 | } | |
2602 | } | |
2603 | ||
2604 | struct nfs4_cached_acl { | |
2605 | int cached; | |
2606 | size_t len; | |
2607 | char data[0]; | |
2608 | }; | |
2609 | ||
2610 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2611 | { | |
2612 | struct nfs_inode *nfsi = NFS_I(inode); | |
2613 | ||
2614 | spin_lock(&inode->i_lock); | |
2615 | kfree(nfsi->nfs4_acl); | |
2616 | nfsi->nfs4_acl = acl; | |
2617 | spin_unlock(&inode->i_lock); | |
2618 | } | |
2619 | ||
2620 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2621 | { | |
2622 | nfs4_set_cached_acl(inode, NULL); | |
2623 | } | |
2624 | ||
2625 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2626 | { | |
2627 | struct nfs_inode *nfsi = NFS_I(inode); | |
2628 | struct nfs4_cached_acl *acl; | |
2629 | int ret = -ENOENT; | |
2630 | ||
2631 | spin_lock(&inode->i_lock); | |
2632 | acl = nfsi->nfs4_acl; | |
2633 | if (acl == NULL) | |
2634 | goto out; | |
2635 | if (buf == NULL) /* user is just asking for length */ | |
2636 | goto out_len; | |
2637 | if (acl->cached == 0) | |
2638 | goto out; | |
2639 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2640 | if (acl->len > buflen) | |
2641 | goto out; | |
2642 | memcpy(buf, acl->data, acl->len); | |
2643 | out_len: | |
2644 | ret = acl->len; | |
2645 | out: | |
2646 | spin_unlock(&inode->i_lock); | |
2647 | return ret; | |
2648 | } | |
2649 | ||
2650 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2651 | { | |
2652 | struct nfs4_cached_acl *acl; | |
2653 | ||
2654 | if (buf && acl_len <= PAGE_SIZE) { | |
2655 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2656 | if (acl == NULL) | |
2657 | goto out; | |
2658 | acl->cached = 1; | |
2659 | memcpy(acl->data, buf, acl_len); | |
2660 | } else { | |
2661 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2662 | if (acl == NULL) | |
2663 | goto out; | |
2664 | acl->cached = 0; | |
2665 | } | |
2666 | acl->len = acl_len; | |
2667 | out: | |
2668 | nfs4_set_cached_acl(inode, acl); | |
2669 | } | |
2670 | ||
2671 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
2672 | { | |
2673 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2674 | struct nfs_getaclargs args = { | |
2675 | .fh = NFS_FH(inode), | |
2676 | .acl_pages = pages, | |
2677 | .acl_len = buflen, | |
2678 | }; | |
2679 | size_t resp_len = buflen; | |
2680 | void *resp_buf; | |
2681 | struct rpc_message msg = { | |
2682 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2683 | .rpc_argp = &args, | |
2684 | .rpc_resp = &resp_len, | |
2685 | }; | |
2686 | struct page *localpage = NULL; | |
2687 | int ret; | |
2688 | ||
2689 | if (buflen < PAGE_SIZE) { | |
2690 | /* As long as we're doing a round trip to the server anyway, | |
2691 | * let's be prepared for a page of acl data. */ | |
2692 | localpage = alloc_page(GFP_KERNEL); | |
2693 | resp_buf = page_address(localpage); | |
2694 | if (localpage == NULL) | |
2695 | return -ENOMEM; | |
2696 | args.acl_pages[0] = localpage; | |
2697 | args.acl_pgbase = 0; | |
2698 | resp_len = args.acl_len = PAGE_SIZE; | |
2699 | } else { | |
2700 | resp_buf = buf; | |
2701 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2702 | } | |
2703 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
2704 | if (ret) | |
2705 | goto out_free; | |
2706 | if (resp_len > args.acl_len) | |
2707 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2708 | else | |
2709 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2710 | if (buf) { | |
2711 | ret = -ERANGE; | |
2712 | if (resp_len > buflen) | |
2713 | goto out_free; | |
2714 | if (localpage) | |
2715 | memcpy(buf, resp_buf, resp_len); | |
2716 | } | |
2717 | ret = resp_len; | |
2718 | out_free: | |
2719 | if (localpage) | |
2720 | __free_page(localpage); | |
2721 | return ret; | |
2722 | } | |
2723 | ||
2724 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) | |
2725 | { | |
2726 | struct nfs_server *server = NFS_SERVER(inode); | |
2727 | int ret; | |
2728 | ||
2729 | if (!nfs4_server_supports_acls(server)) | |
2730 | return -EOPNOTSUPP; | |
2731 | ret = nfs_revalidate_inode(server, inode); | |
2732 | if (ret < 0) | |
2733 | return ret; | |
2734 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2735 | if (ret != -ENOENT) | |
2736 | return ret; | |
2737 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2738 | } | |
2739 | ||
2740 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
2741 | { | |
2742 | struct nfs_server *server = NFS_SERVER(inode); | |
2743 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2744 | struct nfs_setaclargs arg = { | |
2745 | .fh = NFS_FH(inode), | |
2746 | .acl_pages = pages, | |
2747 | .acl_len = buflen, | |
2748 | }; | |
2749 | struct rpc_message msg = { | |
2750 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2751 | .rpc_argp = &arg, | |
2752 | .rpc_resp = NULL, | |
2753 | }; | |
2754 | int ret; | |
2755 | ||
2756 | if (!nfs4_server_supports_acls(server)) | |
2757 | return -EOPNOTSUPP; | |
2758 | nfs_inode_return_delegation(inode); | |
2759 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); | |
2760 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); | |
2761 | if (ret == 0) | |
2762 | nfs4_write_cached_acl(inode, buf, buflen); | |
2763 | return ret; | |
2764 | } | |
2765 | ||
2766 | static int | |
2767 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) | |
2768 | { | |
2769 | struct nfs4_client *clp = server->nfs4_state; | |
2770 | ||
2771 | if (!clp || task->tk_status >= 0) | |
2772 | return 0; | |
2773 | switch(task->tk_status) { | |
2774 | case -NFS4ERR_STALE_CLIENTID: | |
2775 | case -NFS4ERR_STALE_STATEID: | |
2776 | case -NFS4ERR_EXPIRED: | |
2777 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2778 | nfs4_schedule_state_recovery(clp); | |
2779 | if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) | |
2780 | rpc_wake_up_task(task); | |
2781 | task->tk_status = 0; | |
2782 | return -EAGAIN; | |
2783 | case -NFS4ERR_DELAY: | |
2784 | nfs_inc_server_stats((struct nfs_server *) server, | |
2785 | NFSIOS_DELAY); | |
2786 | case -NFS4ERR_GRACE: | |
2787 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
2788 | task->tk_status = 0; | |
2789 | return -EAGAIN; | |
2790 | case -NFS4ERR_OLD_STATEID: | |
2791 | task->tk_status = 0; | |
2792 | return -EAGAIN; | |
2793 | } | |
2794 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2795 | return 0; | |
2796 | } | |
2797 | ||
2798 | static int nfs4_wait_bit_interruptible(void *word) | |
2799 | { | |
2800 | if (signal_pending(current)) | |
2801 | return -ERESTARTSYS; | |
2802 | schedule(); | |
2803 | return 0; | |
2804 | } | |
2805 | ||
2806 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) | |
2807 | { | |
2808 | sigset_t oldset; | |
2809 | int res; | |
2810 | ||
2811 | might_sleep(); | |
2812 | ||
2813 | rpc_clnt_sigmask(clnt, &oldset); | |
2814 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, | |
2815 | nfs4_wait_bit_interruptible, | |
2816 | TASK_INTERRUPTIBLE); | |
2817 | rpc_clnt_sigunmask(clnt, &oldset); | |
2818 | return res; | |
2819 | } | |
2820 | ||
2821 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2822 | { | |
2823 | sigset_t oldset; | |
2824 | int res = 0; | |
2825 | ||
2826 | might_sleep(); | |
2827 | ||
2828 | if (*timeout <= 0) | |
2829 | *timeout = NFS4_POLL_RETRY_MIN; | |
2830 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2831 | *timeout = NFS4_POLL_RETRY_MAX; | |
2832 | rpc_clnt_sigmask(clnt, &oldset); | |
2833 | if (clnt->cl_intr) { | |
2834 | schedule_timeout_interruptible(*timeout); | |
2835 | if (signalled()) | |
2836 | res = -ERESTARTSYS; | |
2837 | } else | |
2838 | schedule_timeout_uninterruptible(*timeout); | |
2839 | rpc_clnt_sigunmask(clnt, &oldset); | |
2840 | *timeout <<= 1; | |
2841 | return res; | |
2842 | } | |
2843 | ||
2844 | /* This is the error handling routine for processes that are allowed | |
2845 | * to sleep. | |
2846 | */ | |
2847 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
2848 | { | |
2849 | struct nfs4_client *clp = server->nfs4_state; | |
2850 | int ret = errorcode; | |
2851 | ||
2852 | exception->retry = 0; | |
2853 | switch(errorcode) { | |
2854 | case 0: | |
2855 | return 0; | |
2856 | case -NFS4ERR_STALE_CLIENTID: | |
2857 | case -NFS4ERR_STALE_STATEID: | |
2858 | case -NFS4ERR_EXPIRED: | |
2859 | nfs4_schedule_state_recovery(clp); | |
2860 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
2861 | if (ret == 0) | |
2862 | exception->retry = 1; | |
2863 | break; | |
2864 | case -NFS4ERR_GRACE: | |
2865 | case -NFS4ERR_DELAY: | |
2866 | ret = nfs4_delay(server->client, &exception->timeout); | |
2867 | if (ret != 0) | |
2868 | break; | |
2869 | case -NFS4ERR_OLD_STATEID: | |
2870 | exception->retry = 1; | |
2871 | } | |
2872 | /* We failed to handle the error */ | |
2873 | return nfs4_map_errors(ret); | |
2874 | } | |
2875 | ||
2876 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) | |
2877 | { | |
2878 | nfs4_verifier sc_verifier; | |
2879 | struct nfs4_setclientid setclientid = { | |
2880 | .sc_verifier = &sc_verifier, | |
2881 | .sc_prog = program, | |
2882 | }; | |
2883 | struct rpc_message msg = { | |
2884 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2885 | .rpc_argp = &setclientid, | |
2886 | .rpc_resp = clp, | |
2887 | .rpc_cred = cred, | |
2888 | }; | |
2889 | u32 *p; | |
2890 | int loop = 0; | |
2891 | int status; | |
2892 | ||
2893 | p = (u32*)sc_verifier.data; | |
2894 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
2895 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2896 | ||
2897 | for(;;) { | |
2898 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2899 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
2900 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), | |
2901 | cred->cr_ops->cr_name, | |
2902 | clp->cl_id_uniquifier); | |
2903 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2904 | sizeof(setclientid.sc_netid), "tcp"); | |
2905 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2906 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2907 | clp->cl_ipaddr, port >> 8, port & 255); | |
2908 | ||
2909 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2910 | if (status != -NFS4ERR_CLID_INUSE) | |
2911 | break; | |
2912 | if (signalled()) | |
2913 | break; | |
2914 | if (loop++ & 1) | |
2915 | ssleep(clp->cl_lease_time + 1); | |
2916 | else | |
2917 | if (++clp->cl_id_uniquifier == 0) | |
2918 | break; | |
2919 | } | |
2920 | return status; | |
2921 | } | |
2922 | ||
2923 | static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) | |
2924 | { | |
2925 | struct nfs_fsinfo fsinfo; | |
2926 | struct rpc_message msg = { | |
2927 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2928 | .rpc_argp = clp, | |
2929 | .rpc_resp = &fsinfo, | |
2930 | .rpc_cred = cred, | |
2931 | }; | |
2932 | unsigned long now; | |
2933 | int status; | |
2934 | ||
2935 | now = jiffies; | |
2936 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2937 | if (status == 0) { | |
2938 | spin_lock(&clp->cl_lock); | |
2939 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2940 | clp->cl_last_renewal = now; | |
2941 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2942 | spin_unlock(&clp->cl_lock); | |
2943 | } | |
2944 | return status; | |
2945 | } | |
2946 | ||
2947 | int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) | |
2948 | { | |
2949 | long timeout; | |
2950 | int err; | |
2951 | do { | |
2952 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
2953 | switch (err) { | |
2954 | case 0: | |
2955 | return err; | |
2956 | case -NFS4ERR_RESOURCE: | |
2957 | /* The IBM lawyers misread another document! */ | |
2958 | case -NFS4ERR_DELAY: | |
2959 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
2960 | } | |
2961 | } while (err == 0); | |
2962 | return err; | |
2963 | } | |
2964 | ||
2965 | struct nfs4_delegreturndata { | |
2966 | struct nfs4_delegreturnargs args; | |
2967 | struct nfs4_delegreturnres res; | |
2968 | struct nfs_fh fh; | |
2969 | nfs4_stateid stateid; | |
2970 | struct rpc_cred *cred; | |
2971 | unsigned long timestamp; | |
2972 | struct nfs_fattr fattr; | |
2973 | int rpc_status; | |
2974 | }; | |
2975 | ||
2976 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) | |
2977 | { | |
2978 | struct nfs4_delegreturndata *data = calldata; | |
2979 | struct rpc_message msg = { | |
2980 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
2981 | .rpc_argp = &data->args, | |
2982 | .rpc_resp = &data->res, | |
2983 | .rpc_cred = data->cred, | |
2984 | }; | |
2985 | nfs_fattr_init(data->res.fattr); | |
2986 | rpc_call_setup(task, &msg, 0); | |
2987 | } | |
2988 | ||
2989 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) | |
2990 | { | |
2991 | struct nfs4_delegreturndata *data = calldata; | |
2992 | data->rpc_status = task->tk_status; | |
2993 | if (data->rpc_status == 0) | |
2994 | renew_lease(data->res.server, data->timestamp); | |
2995 | } | |
2996 | ||
2997 | static void nfs4_delegreturn_release(void *calldata) | |
2998 | { | |
2999 | struct nfs4_delegreturndata *data = calldata; | |
3000 | ||
3001 | put_rpccred(data->cred); | |
3002 | kfree(calldata); | |
3003 | } | |
3004 | ||
3005 | static const struct rpc_call_ops nfs4_delegreturn_ops = { | |
3006 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3007 | .rpc_call_done = nfs4_delegreturn_done, | |
3008 | .rpc_release = nfs4_delegreturn_release, | |
3009 | }; | |
3010 | ||
3011 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
3012 | { | |
3013 | struct nfs4_delegreturndata *data; | |
3014 | struct nfs_server *server = NFS_SERVER(inode); | |
3015 | struct rpc_task *task; | |
3016 | int status; | |
3017 | ||
3018 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
3019 | if (data == NULL) | |
3020 | return -ENOMEM; | |
3021 | data->args.fhandle = &data->fh; | |
3022 | data->args.stateid = &data->stateid; | |
3023 | data->args.bitmask = server->attr_bitmask; | |
3024 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
3025 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
3026 | data->res.fattr = &data->fattr; | |
3027 | data->res.server = server; | |
3028 | data->cred = get_rpccred(cred); | |
3029 | data->timestamp = jiffies; | |
3030 | data->rpc_status = 0; | |
3031 | ||
3032 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); | |
3033 | if (IS_ERR(task)) | |
3034 | return PTR_ERR(task); | |
3035 | status = nfs4_wait_for_completion_rpc_task(task); | |
3036 | if (status == 0) { | |
3037 | status = data->rpc_status; | |
3038 | if (status == 0) | |
3039 | nfs_post_op_update_inode(inode, &data->fattr); | |
3040 | } | |
3041 | rpc_release_task(task); | |
3042 | return status; | |
3043 | } | |
3044 | ||
3045 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
3046 | { | |
3047 | struct nfs_server *server = NFS_SERVER(inode); | |
3048 | struct nfs4_exception exception = { }; | |
3049 | int err; | |
3050 | do { | |
3051 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
3052 | switch (err) { | |
3053 | case -NFS4ERR_STALE_STATEID: | |
3054 | case -NFS4ERR_EXPIRED: | |
3055 | nfs4_schedule_state_recovery(server->nfs4_state); | |
3056 | case 0: | |
3057 | return 0; | |
3058 | } | |
3059 | err = nfs4_handle_exception(server, err, &exception); | |
3060 | } while (exception.retry); | |
3061 | return err; | |
3062 | } | |
3063 | ||
3064 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3065 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3066 | ||
3067 | /* | |
3068 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3069 | */ | |
3070 | static unsigned long | |
3071 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3072 | { | |
3073 | schedule_timeout_interruptible(timeout); | |
3074 | timeout <<= 1; | |
3075 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3076 | return NFS4_LOCK_MAXTIMEOUT; | |
3077 | return timeout; | |
3078 | } | |
3079 | ||
3080 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3081 | { | |
3082 | struct inode *inode = state->inode; | |
3083 | struct nfs_server *server = NFS_SERVER(inode); | |
3084 | struct nfs4_client *clp = server->nfs4_state; | |
3085 | struct nfs_lockt_args arg = { | |
3086 | .fh = NFS_FH(inode), | |
3087 | .fl = request, | |
3088 | }; | |
3089 | struct nfs_lockt_res res = { | |
3090 | .denied = request, | |
3091 | }; | |
3092 | struct rpc_message msg = { | |
3093 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3094 | .rpc_argp = &arg, | |
3095 | .rpc_resp = &res, | |
3096 | .rpc_cred = state->owner->so_cred, | |
3097 | }; | |
3098 | struct nfs4_lock_state *lsp; | |
3099 | int status; | |
3100 | ||
3101 | down_read(&clp->cl_sem); | |
3102 | arg.lock_owner.clientid = clp->cl_clientid; | |
3103 | status = nfs4_set_lock_state(state, request); | |
3104 | if (status != 0) | |
3105 | goto out; | |
3106 | lsp = request->fl_u.nfs4_fl.owner; | |
3107 | arg.lock_owner.id = lsp->ls_id; | |
3108 | status = rpc_call_sync(server->client, &msg, 0); | |
3109 | switch (status) { | |
3110 | case 0: | |
3111 | request->fl_type = F_UNLCK; | |
3112 | break; | |
3113 | case -NFS4ERR_DENIED: | |
3114 | status = 0; | |
3115 | } | |
3116 | out: | |
3117 | up_read(&clp->cl_sem); | |
3118 | return status; | |
3119 | } | |
3120 | ||
3121 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3122 | { | |
3123 | struct nfs4_exception exception = { }; | |
3124 | int err; | |
3125 | ||
3126 | do { | |
3127 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3128 | _nfs4_proc_getlk(state, cmd, request), | |
3129 | &exception); | |
3130 | } while (exception.retry); | |
3131 | return err; | |
3132 | } | |
3133 | ||
3134 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3135 | { | |
3136 | int res = 0; | |
3137 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3138 | case FL_POSIX: | |
3139 | res = posix_lock_file_wait(file, fl); | |
3140 | break; | |
3141 | case FL_FLOCK: | |
3142 | res = flock_lock_file_wait(file, fl); | |
3143 | break; | |
3144 | default: | |
3145 | BUG(); | |
3146 | } | |
3147 | return res; | |
3148 | } | |
3149 | ||
3150 | struct nfs4_unlockdata { | |
3151 | struct nfs_locku_args arg; | |
3152 | struct nfs_locku_res res; | |
3153 | struct nfs4_lock_state *lsp; | |
3154 | struct nfs_open_context *ctx; | |
3155 | struct file_lock fl; | |
3156 | const struct nfs_server *server; | |
3157 | unsigned long timestamp; | |
3158 | }; | |
3159 | ||
3160 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, | |
3161 | struct nfs_open_context *ctx, | |
3162 | struct nfs4_lock_state *lsp, | |
3163 | struct nfs_seqid *seqid) | |
3164 | { | |
3165 | struct nfs4_unlockdata *p; | |
3166 | struct inode *inode = lsp->ls_state->inode; | |
3167 | ||
3168 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3169 | if (p == NULL) | |
3170 | return NULL; | |
3171 | p->arg.fh = NFS_FH(inode); | |
3172 | p->arg.fl = &p->fl; | |
3173 | p->arg.seqid = seqid; | |
3174 | p->arg.stateid = &lsp->ls_stateid; | |
3175 | p->lsp = lsp; | |
3176 | atomic_inc(&lsp->ls_count); | |
3177 | /* Ensure we don't close file until we're done freeing locks! */ | |
3178 | p->ctx = get_nfs_open_context(ctx); | |
3179 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3180 | p->server = NFS_SERVER(inode); | |
3181 | return p; | |
3182 | } | |
3183 | ||
3184 | static void nfs4_locku_release_calldata(void *data) | |
3185 | { | |
3186 | struct nfs4_unlockdata *calldata = data; | |
3187 | nfs_free_seqid(calldata->arg.seqid); | |
3188 | nfs4_put_lock_state(calldata->lsp); | |
3189 | put_nfs_open_context(calldata->ctx); | |
3190 | kfree(calldata); | |
3191 | } | |
3192 | ||
3193 | static void nfs4_locku_done(struct rpc_task *task, void *data) | |
3194 | { | |
3195 | struct nfs4_unlockdata *calldata = data; | |
3196 | ||
3197 | if (RPC_ASSASSINATED(task)) | |
3198 | return; | |
3199 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); | |
3200 | switch (task->tk_status) { | |
3201 | case 0: | |
3202 | memcpy(calldata->lsp->ls_stateid.data, | |
3203 | calldata->res.stateid.data, | |
3204 | sizeof(calldata->lsp->ls_stateid.data)); | |
3205 | renew_lease(calldata->server, calldata->timestamp); | |
3206 | break; | |
3207 | case -NFS4ERR_STALE_STATEID: | |
3208 | case -NFS4ERR_EXPIRED: | |
3209 | nfs4_schedule_state_recovery(calldata->server->nfs4_state); | |
3210 | break; | |
3211 | default: | |
3212 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) { | |
3213 | rpc_restart_call(task); | |
3214 | } | |
3215 | } | |
3216 | } | |
3217 | ||
3218 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) | |
3219 | { | |
3220 | struct nfs4_unlockdata *calldata = data; | |
3221 | struct rpc_message msg = { | |
3222 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3223 | .rpc_argp = &calldata->arg, | |
3224 | .rpc_resp = &calldata->res, | |
3225 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
3226 | }; | |
3227 | ||
3228 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
3229 | return; | |
3230 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
3231 | /* Note: exit _without_ running nfs4_locku_done */ | |
3232 | task->tk_action = NULL; | |
3233 | return; | |
3234 | } | |
3235 | calldata->timestamp = jiffies; | |
3236 | rpc_call_setup(task, &msg, 0); | |
3237 | } | |
3238 | ||
3239 | static const struct rpc_call_ops nfs4_locku_ops = { | |
3240 | .rpc_call_prepare = nfs4_locku_prepare, | |
3241 | .rpc_call_done = nfs4_locku_done, | |
3242 | .rpc_release = nfs4_locku_release_calldata, | |
3243 | }; | |
3244 | ||
3245 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, | |
3246 | struct nfs_open_context *ctx, | |
3247 | struct nfs4_lock_state *lsp, | |
3248 | struct nfs_seqid *seqid) | |
3249 | { | |
3250 | struct nfs4_unlockdata *data; | |
3251 | ||
3252 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3253 | if (data == NULL) { | |
3254 | nfs_free_seqid(seqid); | |
3255 | return ERR_PTR(-ENOMEM); | |
3256 | } | |
3257 | ||
3258 | return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); | |
3259 | } | |
3260 | ||
3261 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3262 | { | |
3263 | struct nfs_seqid *seqid; | |
3264 | struct nfs4_lock_state *lsp; | |
3265 | struct rpc_task *task; | |
3266 | int status = 0; | |
3267 | ||
3268 | status = nfs4_set_lock_state(state, request); | |
3269 | /* Unlock _before_ we do the RPC call */ | |
3270 | request->fl_flags |= FL_EXISTS; | |
3271 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) | |
3272 | goto out; | |
3273 | if (status != 0) | |
3274 | goto out; | |
3275 | /* Is this a delegated lock? */ | |
3276 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3277 | goto out; | |
3278 | lsp = request->fl_u.nfs4_fl.owner; | |
3279 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3280 | status = -ENOMEM; | |
3281 | if (seqid == NULL) | |
3282 | goto out; | |
3283 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); | |
3284 | status = PTR_ERR(task); | |
3285 | if (IS_ERR(task)) | |
3286 | goto out; | |
3287 | status = nfs4_wait_for_completion_rpc_task(task); | |
3288 | rpc_release_task(task); | |
3289 | out: | |
3290 | return status; | |
3291 | } | |
3292 | ||
3293 | struct nfs4_lockdata { | |
3294 | struct nfs_lock_args arg; | |
3295 | struct nfs_lock_res res; | |
3296 | struct nfs4_lock_state *lsp; | |
3297 | struct nfs_open_context *ctx; | |
3298 | struct file_lock fl; | |
3299 | unsigned long timestamp; | |
3300 | int rpc_status; | |
3301 | int cancelled; | |
3302 | }; | |
3303 | ||
3304 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3305 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
3306 | { | |
3307 | struct nfs4_lockdata *p; | |
3308 | struct inode *inode = lsp->ls_state->inode; | |
3309 | struct nfs_server *server = NFS_SERVER(inode); | |
3310 | ||
3311 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3312 | if (p == NULL) | |
3313 | return NULL; | |
3314 | ||
3315 | p->arg.fh = NFS_FH(inode); | |
3316 | p->arg.fl = &p->fl; | |
3317 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3318 | if (p->arg.lock_seqid == NULL) | |
3319 | goto out_free; | |
3320 | p->arg.lock_stateid = &lsp->ls_stateid; | |
3321 | p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid; | |
3322 | p->arg.lock_owner.id = lsp->ls_id; | |
3323 | p->lsp = lsp; | |
3324 | atomic_inc(&lsp->ls_count); | |
3325 | p->ctx = get_nfs_open_context(ctx); | |
3326 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3327 | return p; | |
3328 | out_free: | |
3329 | kfree(p); | |
3330 | return NULL; | |
3331 | } | |
3332 | ||
3333 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3334 | { | |
3335 | struct nfs4_lockdata *data = calldata; | |
3336 | struct nfs4_state *state = data->lsp->ls_state; | |
3337 | struct nfs4_state_owner *sp = state->owner; | |
3338 | struct rpc_message msg = { | |
3339 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3340 | .rpc_argp = &data->arg, | |
3341 | .rpc_resp = &data->res, | |
3342 | .rpc_cred = sp->so_cred, | |
3343 | }; | |
3344 | ||
3345 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) | |
3346 | return; | |
3347 | dprintk("%s: begin!\n", __FUNCTION__); | |
3348 | /* Do we need to do an open_to_lock_owner? */ | |
3349 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3350 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); | |
3351 | if (data->arg.open_seqid == NULL) { | |
3352 | data->rpc_status = -ENOMEM; | |
3353 | task->tk_action = NULL; | |
3354 | goto out; | |
3355 | } | |
3356 | data->arg.open_stateid = &state->stateid; | |
3357 | data->arg.new_lock_owner = 1; | |
3358 | } | |
3359 | data->timestamp = jiffies; | |
3360 | rpc_call_setup(task, &msg, 0); | |
3361 | out: | |
3362 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); | |
3363 | } | |
3364 | ||
3365 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3366 | { | |
3367 | struct nfs4_lockdata *data = calldata; | |
3368 | ||
3369 | dprintk("%s: begin!\n", __FUNCTION__); | |
3370 | ||
3371 | data->rpc_status = task->tk_status; | |
3372 | if (RPC_ASSASSINATED(task)) | |
3373 | goto out; | |
3374 | if (data->arg.new_lock_owner != 0) { | |
3375 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); | |
3376 | if (data->rpc_status == 0) | |
3377 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3378 | else | |
3379 | goto out; | |
3380 | } | |
3381 | if (data->rpc_status == 0) { | |
3382 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3383 | sizeof(data->lsp->ls_stateid.data)); | |
3384 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
3385 | renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); | |
3386 | } | |
3387 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); | |
3388 | out: | |
3389 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); | |
3390 | } | |
3391 | ||
3392 | static void nfs4_lock_release(void *calldata) | |
3393 | { | |
3394 | struct nfs4_lockdata *data = calldata; | |
3395 | ||
3396 | dprintk("%s: begin!\n", __FUNCTION__); | |
3397 | if (data->arg.open_seqid != NULL) | |
3398 | nfs_free_seqid(data->arg.open_seqid); | |
3399 | if (data->cancelled != 0) { | |
3400 | struct rpc_task *task; | |
3401 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3402 | data->arg.lock_seqid); | |
3403 | if (!IS_ERR(task)) | |
3404 | rpc_release_task(task); | |
3405 | dprintk("%s: cancelling lock!\n", __FUNCTION__); | |
3406 | } else | |
3407 | nfs_free_seqid(data->arg.lock_seqid); | |
3408 | nfs4_put_lock_state(data->lsp); | |
3409 | put_nfs_open_context(data->ctx); | |
3410 | kfree(data); | |
3411 | dprintk("%s: done!\n", __FUNCTION__); | |
3412 | } | |
3413 | ||
3414 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3415 | .rpc_call_prepare = nfs4_lock_prepare, | |
3416 | .rpc_call_done = nfs4_lock_done, | |
3417 | .rpc_release = nfs4_lock_release, | |
3418 | }; | |
3419 | ||
3420 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3421 | { | |
3422 | struct nfs4_lockdata *data; | |
3423 | struct rpc_task *task; | |
3424 | int ret; | |
3425 | ||
3426 | dprintk("%s: begin!\n", __FUNCTION__); | |
3427 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, | |
3428 | fl->fl_u.nfs4_fl.owner); | |
3429 | if (data == NULL) | |
3430 | return -ENOMEM; | |
3431 | if (IS_SETLKW(cmd)) | |
3432 | data->arg.block = 1; | |
3433 | if (reclaim != 0) | |
3434 | data->arg.reclaim = 1; | |
3435 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, | |
3436 | &nfs4_lock_ops, data); | |
3437 | if (IS_ERR(task)) | |
3438 | return PTR_ERR(task); | |
3439 | ret = nfs4_wait_for_completion_rpc_task(task); | |
3440 | if (ret == 0) { | |
3441 | ret = data->rpc_status; | |
3442 | if (ret == -NFS4ERR_DENIED) | |
3443 | ret = -EAGAIN; | |
3444 | } else | |
3445 | data->cancelled = 1; | |
3446 | rpc_release_task(task); | |
3447 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); | |
3448 | return ret; | |
3449 | } | |
3450 | ||
3451 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3452 | { | |
3453 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3454 | struct nfs4_exception exception = { }; | |
3455 | int err; | |
3456 | ||
3457 | do { | |
3458 | /* Cache the lock if possible... */ | |
3459 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3460 | return 0; | |
3461 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
3462 | if (err != -NFS4ERR_DELAY) | |
3463 | break; | |
3464 | nfs4_handle_exception(server, err, &exception); | |
3465 | } while (exception.retry); | |
3466 | return err; | |
3467 | } | |
3468 | ||
3469 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3470 | { | |
3471 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3472 | struct nfs4_exception exception = { }; | |
3473 | int err; | |
3474 | ||
3475 | err = nfs4_set_lock_state(state, request); | |
3476 | if (err != 0) | |
3477 | return err; | |
3478 | do { | |
3479 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3480 | return 0; | |
3481 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
3482 | if (err != -NFS4ERR_DELAY) | |
3483 | break; | |
3484 | nfs4_handle_exception(server, err, &exception); | |
3485 | } while (exception.retry); | |
3486 | return err; | |
3487 | } | |
3488 | ||
3489 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3490 | { | |
3491 | struct nfs4_client *clp = state->owner->so_client; | |
3492 | unsigned char fl_flags = request->fl_flags; | |
3493 | int status; | |
3494 | ||
3495 | /* Is this a delegated open? */ | |
3496 | status = nfs4_set_lock_state(state, request); | |
3497 | if (status != 0) | |
3498 | goto out; | |
3499 | request->fl_flags |= FL_ACCESS; | |
3500 | status = do_vfs_lock(request->fl_file, request); | |
3501 | if (status < 0) | |
3502 | goto out; | |
3503 | down_read(&clp->cl_sem); | |
3504 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3505 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
3506 | /* Yes: cache locks! */ | |
3507 | down_read(&nfsi->rwsem); | |
3508 | /* ...but avoid races with delegation recall... */ | |
3509 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3510 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
3511 | status = do_vfs_lock(request->fl_file, request); | |
3512 | up_read(&nfsi->rwsem); | |
3513 | goto out_unlock; | |
3514 | } | |
3515 | up_read(&nfsi->rwsem); | |
3516 | } | |
3517 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
3518 | if (status != 0) | |
3519 | goto out_unlock; | |
3520 | /* Note: we always want to sleep here! */ | |
3521 | request->fl_flags = fl_flags | FL_SLEEP; | |
3522 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3523 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
3524 | out_unlock: | |
3525 | up_read(&clp->cl_sem); | |
3526 | out: | |
3527 | request->fl_flags = fl_flags; | |
3528 | return status; | |
3529 | } | |
3530 | ||
3531 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3532 | { | |
3533 | struct nfs4_exception exception = { }; | |
3534 | int err; | |
3535 | ||
3536 | do { | |
3537 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3538 | _nfs4_proc_setlk(state, cmd, request), | |
3539 | &exception); | |
3540 | } while (exception.retry); | |
3541 | return err; | |
3542 | } | |
3543 | ||
3544 | static int | |
3545 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3546 | { | |
3547 | struct nfs_open_context *ctx; | |
3548 | struct nfs4_state *state; | |
3549 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3550 | int status; | |
3551 | ||
3552 | /* verify open state */ | |
3553 | ctx = (struct nfs_open_context *)filp->private_data; | |
3554 | state = ctx->state; | |
3555 | ||
3556 | if (request->fl_start < 0 || request->fl_end < 0) | |
3557 | return -EINVAL; | |
3558 | ||
3559 | if (IS_GETLK(cmd)) | |
3560 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3561 | ||
3562 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3563 | return -EINVAL; | |
3564 | ||
3565 | if (request->fl_type == F_UNLCK) | |
3566 | return nfs4_proc_unlck(state, cmd, request); | |
3567 | ||
3568 | do { | |
3569 | status = nfs4_proc_setlk(state, cmd, request); | |
3570 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3571 | break; | |
3572 | timeout = nfs4_set_lock_task_retry(timeout); | |
3573 | status = -ERESTARTSYS; | |
3574 | if (signalled()) | |
3575 | break; | |
3576 | } while(status < 0); | |
3577 | return status; | |
3578 | } | |
3579 | ||
3580 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) | |
3581 | { | |
3582 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3583 | struct nfs4_exception exception = { }; | |
3584 | int err; | |
3585 | ||
3586 | err = nfs4_set_lock_state(state, fl); | |
3587 | if (err != 0) | |
3588 | goto out; | |
3589 | do { | |
3590 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3591 | if (err != -NFS4ERR_DELAY) | |
3592 | break; | |
3593 | err = nfs4_handle_exception(server, err, &exception); | |
3594 | } while (exception.retry); | |
3595 | out: | |
3596 | return err; | |
3597 | } | |
3598 | ||
3599 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" | |
3600 | ||
3601 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, | |
3602 | size_t buflen, int flags) | |
3603 | { | |
3604 | struct inode *inode = dentry->d_inode; | |
3605 | ||
3606 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3607 | return -EOPNOTSUPP; | |
3608 | ||
3609 | if (!S_ISREG(inode->i_mode) && | |
3610 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3611 | return -EPERM; | |
3612 | ||
3613 | return nfs4_proc_set_acl(inode, buf, buflen); | |
3614 | } | |
3615 | ||
3616 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3617 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3618 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3619 | * attributes in kernel-managed attribute namespaces. */ | |
3620 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3621 | size_t buflen) | |
3622 | { | |
3623 | struct inode *inode = dentry->d_inode; | |
3624 | ||
3625 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3626 | return -EOPNOTSUPP; | |
3627 | ||
3628 | return nfs4_proc_get_acl(inode, buf, buflen); | |
3629 | } | |
3630 | ||
3631 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3632 | { | |
3633 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; | |
3634 | ||
3635 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) | |
3636 | return 0; | |
3637 | if (buf && buflen < len) | |
3638 | return -ERANGE; | |
3639 | if (buf) | |
3640 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); | |
3641 | return len; | |
3642 | } | |
3643 | ||
3644 | int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry, | |
3645 | struct nfs4_fs_locations *fs_locations, struct page *page) | |
3646 | { | |
3647 | struct nfs_server *server = NFS_SERVER(dir); | |
3648 | u32 bitmask[2] = { | |
3649 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, | |
3650 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
3651 | }; | |
3652 | struct nfs4_fs_locations_arg args = { | |
3653 | .dir_fh = NFS_FH(dir), | |
3654 | .name = &dentry->d_name, | |
3655 | .page = page, | |
3656 | .bitmask = bitmask, | |
3657 | }; | |
3658 | struct rpc_message msg = { | |
3659 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3660 | .rpc_argp = &args, | |
3661 | .rpc_resp = fs_locations, | |
3662 | }; | |
3663 | int status; | |
3664 | ||
3665 | dprintk("%s: start\n", __FUNCTION__); | |
3666 | fs_locations->fattr.valid = 0; | |
3667 | fs_locations->server = server; | |
3668 | fs_locations->nlocations = 0; | |
3669 | status = rpc_call_sync(server->client, &msg, 0); | |
3670 | dprintk("%s: returned status = %d\n", __FUNCTION__, status); | |
3671 | return status; | |
3672 | } | |
3673 | ||
3674 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { | |
3675 | .recover_open = nfs4_open_reclaim, | |
3676 | .recover_lock = nfs4_lock_reclaim, | |
3677 | }; | |
3678 | ||
3679 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3680 | .recover_open = nfs4_open_expired, | |
3681 | .recover_lock = nfs4_lock_expired, | |
3682 | }; | |
3683 | ||
3684 | static struct inode_operations nfs4_file_inode_operations = { | |
3685 | .permission = nfs_permission, | |
3686 | .getattr = nfs_getattr, | |
3687 | .setattr = nfs_setattr, | |
3688 | .getxattr = nfs4_getxattr, | |
3689 | .setxattr = nfs4_setxattr, | |
3690 | .listxattr = nfs4_listxattr, | |
3691 | }; | |
3692 | ||
3693 | struct nfs_rpc_ops nfs_v4_clientops = { | |
3694 | .version = 4, /* protocol version */ | |
3695 | .dentry_ops = &nfs4_dentry_operations, | |
3696 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
3697 | .file_inode_ops = &nfs4_file_inode_operations, | |
3698 | .getroot = nfs4_proc_get_root, | |
3699 | .getattr = nfs4_proc_getattr, | |
3700 | .setattr = nfs4_proc_setattr, | |
3701 | .lookup = nfs4_proc_lookup, | |
3702 | .access = nfs4_proc_access, | |
3703 | .readlink = nfs4_proc_readlink, | |
3704 | .read = nfs4_proc_read, | |
3705 | .write = nfs4_proc_write, | |
3706 | .commit = nfs4_proc_commit, | |
3707 | .create = nfs4_proc_create, | |
3708 | .remove = nfs4_proc_remove, | |
3709 | .unlink_setup = nfs4_proc_unlink_setup, | |
3710 | .unlink_done = nfs4_proc_unlink_done, | |
3711 | .rename = nfs4_proc_rename, | |
3712 | .link = nfs4_proc_link, | |
3713 | .symlink = nfs4_proc_symlink, | |
3714 | .mkdir = nfs4_proc_mkdir, | |
3715 | .rmdir = nfs4_proc_remove, | |
3716 | .readdir = nfs4_proc_readdir, | |
3717 | .mknod = nfs4_proc_mknod, | |
3718 | .statfs = nfs4_proc_statfs, | |
3719 | .fsinfo = nfs4_proc_fsinfo, | |
3720 | .pathconf = nfs4_proc_pathconf, | |
3721 | .decode_dirent = nfs4_decode_dirent, | |
3722 | .read_setup = nfs4_proc_read_setup, | |
3723 | .read_done = nfs4_read_done, | |
3724 | .write_setup = nfs4_proc_write_setup, | |
3725 | .write_done = nfs4_write_done, | |
3726 | .commit_setup = nfs4_proc_commit_setup, | |
3727 | .commit_done = nfs4_commit_done, | |
3728 | .file_open = nfs_open, | |
3729 | .file_release = nfs_release, | |
3730 | .lock = nfs4_proc_lock, | |
3731 | .clear_acl_cache = nfs4_zap_acl_attr, | |
3732 | }; | |
3733 | ||
3734 | /* | |
3735 | * Local variables: | |
3736 | * c-basic-offset: 8 | |
3737 | * End: | |
3738 | */ |