Commit | Line | Data |
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1da177e4 LT |
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> | |
02a913a7 | 50 | #include <linux/mount.h> |
1da177e4 | 51 | |
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 LT |
53 | #include "delegation.h" |
54 | ||
55 | #define NFSDBG_FACILITY NFSDBG_PROC | |
56 | ||
57 | #define NFS4_POLL_RETRY_MIN (1*HZ) | |
58 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
59 | ||
cdd4e68b | 60 | struct nfs4_opendata; |
864472e9 | 61 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 62 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
faf5f49c | 63 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
1da177e4 | 64 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
faf5f49c | 65 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
1da177e4 LT |
66 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
67 | extern struct rpc_procinfo nfs4_procedures[]; | |
68 | ||
1da177e4 LT |
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 | ||
4ce79717 | 109 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
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 | static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, | |
123 | struct nfs4_readdir_arg *readdir) | |
124 | { | |
125 | u32 *start, *p; | |
126 | ||
127 | BUG_ON(readdir->count < 80); | |
128 | if (cookie > 2) { | |
b7ef1956 | 129 | readdir->cookie = cookie; |
1da177e4 LT |
130 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
131 | return; | |
132 | } | |
133 | ||
134 | readdir->cookie = 0; | |
135 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
136 | if (cookie == 2) | |
137 | return; | |
138 | ||
139 | /* | |
140 | * NFSv4 servers do not return entries for '.' and '..' | |
141 | * Therefore, we fake these entries here. We let '.' | |
142 | * have cookie 0 and '..' have cookie 1. Note that | |
143 | * when talking to the server, we always send cookie 0 | |
144 | * instead of 1 or 2. | |
145 | */ | |
146 | start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); | |
147 | ||
148 | if (cookie == 0) { | |
149 | *p++ = xdr_one; /* next */ | |
150 | *p++ = xdr_zero; /* cookie, first word */ | |
151 | *p++ = xdr_one; /* cookie, second word */ | |
152 | *p++ = xdr_one; /* entry len */ | |
153 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
154 | p++; | |
155 | *p++ = xdr_one; /* bitmap length */ | |
156 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
157 | *p++ = htonl(8); /* attribute buffer length */ | |
158 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); | |
159 | } | |
160 | ||
161 | *p++ = xdr_one; /* next */ | |
162 | *p++ = xdr_zero; /* cookie, first word */ | |
163 | *p++ = xdr_two; /* cookie, second word */ | |
164 | *p++ = xdr_two; /* entry len */ | |
165 | memcpy(p, "..\0\0", 4); /* entry */ | |
166 | p++; | |
167 | *p++ = xdr_one; /* bitmap length */ | |
168 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
169 | *p++ = htonl(8); /* attribute buffer length */ | |
170 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); | |
171 | ||
172 | readdir->pgbase = (char *)p - (char *)start; | |
173 | readdir->count -= readdir->pgbase; | |
174 | kunmap_atomic(start, KM_USER0); | |
175 | } | |
176 | ||
177 | static void | |
178 | renew_lease(struct nfs_server *server, unsigned long timestamp) | |
179 | { | |
180 | struct nfs4_client *clp = server->nfs4_state; | |
181 | spin_lock(&clp->cl_lock); | |
182 | if (time_before(clp->cl_last_renewal,timestamp)) | |
183 | clp->cl_last_renewal = timestamp; | |
184 | spin_unlock(&clp->cl_lock); | |
185 | } | |
186 | ||
187 | static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) | |
188 | { | |
189 | struct nfs_inode *nfsi = NFS_I(inode); | |
190 | ||
decf491f TM |
191 | spin_lock(&inode->i_lock); |
192 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
1da177e4 LT |
193 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
194 | nfsi->change_attr = cinfo->after; | |
decf491f | 195 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
196 | } |
197 | ||
e56e0b78 | 198 | struct nfs4_opendata { |
24ac23ab | 199 | atomic_t count; |
e56e0b78 TM |
200 | struct nfs_openargs o_arg; |
201 | struct nfs_openres o_res; | |
cdd4e68b TM |
202 | struct nfs_open_confirmargs c_arg; |
203 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
204 | struct nfs_fattr f_attr; |
205 | struct nfs_fattr dir_attr; | |
206 | struct dentry *dentry; | |
207 | struct dentry *dir; | |
208 | struct nfs4_state_owner *owner; | |
209 | struct iattr attrs; | |
24ac23ab TM |
210 | int rpc_status; |
211 | int cancelled; | |
e56e0b78 TM |
212 | }; |
213 | ||
214 | static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, | |
215 | struct nfs4_state_owner *sp, int flags, | |
216 | const struct iattr *attrs) | |
217 | { | |
218 | struct dentry *parent = dget_parent(dentry); | |
219 | struct inode *dir = parent->d_inode; | |
220 | struct nfs_server *server = NFS_SERVER(dir); | |
221 | struct nfs4_opendata *p; | |
222 | ||
223 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
224 | if (p == NULL) | |
225 | goto err; | |
226 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
227 | if (p->o_arg.seqid == NULL) | |
228 | goto err_free; | |
24ac23ab | 229 | atomic_set(&p->count, 1); |
e56e0b78 TM |
230 | p->dentry = dget(dentry); |
231 | p->dir = parent; | |
232 | p->owner = sp; | |
233 | atomic_inc(&sp->so_count); | |
234 | p->o_arg.fh = NFS_FH(dir); | |
235 | p->o_arg.open_flags = flags, | |
236 | p->o_arg.clientid = server->nfs4_state->cl_clientid; | |
237 | p->o_arg.id = sp->so_id; | |
238 | p->o_arg.name = &dentry->d_name; | |
239 | p->o_arg.server = server; | |
240 | p->o_arg.bitmask = server->attr_bitmask; | |
241 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
242 | p->o_res.f_attr = &p->f_attr; | |
243 | p->o_res.dir_attr = &p->dir_attr; | |
244 | p->o_res.server = server; | |
245 | nfs_fattr_init(&p->f_attr); | |
246 | nfs_fattr_init(&p->dir_attr); | |
247 | if (flags & O_EXCL) { | |
248 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
249 | s[0] = jiffies; | |
250 | s[1] = current->pid; | |
251 | } else if (flags & O_CREAT) { | |
252 | p->o_arg.u.attrs = &p->attrs; | |
253 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
254 | } | |
cdd4e68b TM |
255 | p->c_arg.fh = &p->o_res.fh; |
256 | p->c_arg.stateid = &p->o_res.stateid; | |
257 | p->c_arg.seqid = p->o_arg.seqid; | |
e56e0b78 TM |
258 | return p; |
259 | err_free: | |
260 | kfree(p); | |
261 | err: | |
262 | dput(parent); | |
263 | return NULL; | |
264 | } | |
265 | ||
266 | static void nfs4_opendata_free(struct nfs4_opendata *p) | |
267 | { | |
24ac23ab | 268 | if (p != NULL && atomic_dec_and_test(&p->count)) { |
e56e0b78 TM |
269 | nfs_free_seqid(p->o_arg.seqid); |
270 | nfs4_put_state_owner(p->owner); | |
271 | dput(p->dir); | |
272 | dput(p->dentry); | |
273 | kfree(p); | |
274 | } | |
275 | } | |
276 | ||
9512135d | 277 | /* Helper for asynchronous RPC calls */ |
4ce70ada | 278 | static int nfs4_call_async(struct rpc_clnt *clnt, |
963d8fe5 | 279 | const struct rpc_call_ops *tk_ops, void *calldata) |
9512135d TM |
280 | { |
281 | struct rpc_task *task; | |
282 | ||
963d8fe5 | 283 | if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata))) |
9512135d | 284 | return -ENOMEM; |
9512135d TM |
285 | rpc_execute(task); |
286 | return 0; | |
287 | } | |
288 | ||
06f814a3 TM |
289 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
290 | { | |
291 | sigset_t oldset; | |
292 | int ret; | |
293 | ||
294 | rpc_clnt_sigmask(task->tk_client, &oldset); | |
295 | ret = rpc_wait_for_completion_task(task); | |
296 | rpc_clnt_sigunmask(task->tk_client, &oldset); | |
297 | return ret; | |
298 | } | |
299 | ||
e7616923 TM |
300 | static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags) |
301 | { | |
302 | switch (open_flags) { | |
303 | case FMODE_WRITE: | |
304 | state->n_wronly++; | |
305 | break; | |
306 | case FMODE_READ: | |
307 | state->n_rdonly++; | |
308 | break; | |
309 | case FMODE_READ|FMODE_WRITE: | |
310 | state->n_rdwr++; | |
311 | } | |
312 | } | |
313 | ||
1da177e4 LT |
314 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
315 | { | |
316 | struct inode *inode = state->inode; | |
317 | ||
318 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
d530838b | 319 | /* Protect against nfs4_find_state_byowner() */ |
ec073428 | 320 | spin_lock(&state->owner->so_lock); |
1da177e4 | 321 | spin_lock(&inode->i_lock); |
4cecb76f | 322 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); |
e7616923 | 323 | update_open_stateflags(state, open_flags); |
4cecb76f | 324 | nfs4_state_set_mode_locked(state, state->state | open_flags); |
1da177e4 | 325 | spin_unlock(&inode->i_lock); |
ec073428 | 326 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
327 | } |
328 | ||
24ac23ab TM |
329 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
330 | { | |
331 | struct inode *inode; | |
332 | struct nfs4_state *state = NULL; | |
333 | ||
334 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
335 | goto out; | |
336 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
337 | if (inode == NULL) | |
338 | goto out; | |
339 | state = nfs4_get_open_state(inode, data->owner); | |
340 | if (state == NULL) | |
341 | goto put_inode; | |
342 | update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags); | |
343 | put_inode: | |
344 | iput(inode); | |
345 | out: | |
346 | return state; | |
347 | } | |
348 | ||
864472e9 TM |
349 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
350 | { | |
351 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
352 | struct nfs_open_context *ctx; | |
353 | ||
354 | spin_lock(&state->inode->i_lock); | |
355 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
356 | if (ctx->state != state) | |
357 | continue; | |
358 | get_nfs_open_context(ctx); | |
359 | spin_unlock(&state->inode->i_lock); | |
360 | return ctx; | |
361 | } | |
362 | spin_unlock(&state->inode->i_lock); | |
363 | return ERR_PTR(-ENOENT); | |
364 | } | |
365 | ||
366 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid) | |
367 | { | |
368 | int ret; | |
369 | ||
370 | opendata->o_arg.open_flags = openflags; | |
371 | ret = _nfs4_proc_open(opendata); | |
372 | if (ret != 0) | |
373 | return ret; | |
374 | memcpy(stateid->data, opendata->o_res.stateid.data, | |
375 | sizeof(stateid->data)); | |
376 | return 0; | |
377 | } | |
378 | ||
379 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
380 | { | |
381 | nfs4_stateid stateid; | |
382 | struct nfs4_state *newstate; | |
383 | int mode = 0; | |
384 | int delegation = 0; | |
385 | int ret; | |
386 | ||
387 | /* memory barrier prior to reading state->n_* */ | |
388 | smp_rmb(); | |
389 | if (state->n_rdwr != 0) { | |
390 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid); | |
391 | if (ret != 0) | |
392 | return ret; | |
393 | mode |= FMODE_READ|FMODE_WRITE; | |
394 | if (opendata->o_res.delegation_type != 0) | |
395 | delegation = opendata->o_res.delegation_type; | |
396 | smp_rmb(); | |
397 | } | |
398 | if (state->n_wronly != 0) { | |
399 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid); | |
400 | if (ret != 0) | |
401 | return ret; | |
402 | mode |= FMODE_WRITE; | |
403 | if (opendata->o_res.delegation_type != 0) | |
404 | delegation = opendata->o_res.delegation_type; | |
405 | smp_rmb(); | |
406 | } | |
407 | if (state->n_rdonly != 0) { | |
408 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid); | |
409 | if (ret != 0) | |
410 | return ret; | |
411 | mode |= FMODE_READ; | |
412 | } | |
413 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
414 | if (mode == 0) | |
415 | return 0; | |
416 | if (opendata->o_res.delegation_type == 0) | |
417 | opendata->o_res.delegation_type = delegation; | |
418 | opendata->o_arg.open_flags |= mode; | |
419 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
420 | if (newstate != NULL) { | |
421 | if (opendata->o_res.delegation_type != 0) { | |
422 | struct nfs_inode *nfsi = NFS_I(newstate->inode); | |
423 | int delegation_flags = 0; | |
424 | if (nfsi->delegation) | |
425 | delegation_flags = nfsi->delegation->flags; | |
426 | if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM)) | |
427 | nfs_inode_set_delegation(newstate->inode, | |
428 | opendata->owner->so_cred, | |
429 | &opendata->o_res); | |
430 | else | |
431 | nfs_inode_reclaim_delegation(newstate->inode, | |
432 | opendata->owner->so_cred, | |
433 | &opendata->o_res); | |
434 | } | |
435 | nfs4_close_state(newstate, opendata->o_arg.open_flags); | |
436 | } | |
437 | if (newstate != state) | |
438 | return -ESTALE; | |
439 | return 0; | |
440 | } | |
441 | ||
1da177e4 LT |
442 | /* |
443 | * OPEN_RECLAIM: | |
444 | * reclaim state on the server after a reboot. | |
1da177e4 | 445 | */ |
864472e9 | 446 | static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
1da177e4 | 447 | { |
864472e9 TM |
448 | struct nfs_delegation *delegation = NFS_I(state->inode)->delegation; |
449 | struct nfs4_opendata *opendata; | |
450 | int delegation_type = 0; | |
1da177e4 LT |
451 | int status; |
452 | ||
453 | if (delegation != NULL) { | |
454 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
455 | memcpy(&state->stateid, &delegation->stateid, | |
456 | sizeof(state->stateid)); | |
457 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
458 | return 0; | |
459 | } | |
864472e9 | 460 | delegation_type = delegation->type; |
1da177e4 | 461 | } |
864472e9 TM |
462 | opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); |
463 | if (opendata == NULL) | |
cee54fc9 | 464 | return -ENOMEM; |
864472e9 TM |
465 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
466 | opendata->o_arg.fh = NFS_FH(state->inode); | |
467 | nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh); | |
468 | opendata->o_arg.u.delegation_type = delegation_type; | |
469 | status = nfs4_open_recover(opendata, state); | |
470 | nfs4_opendata_free(opendata); | |
1da177e4 LT |
471 | return status; |
472 | } | |
473 | ||
864472e9 | 474 | static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
1da177e4 LT |
475 | { |
476 | struct nfs_server *server = NFS_SERVER(state->inode); | |
477 | struct nfs4_exception exception = { }; | |
478 | int err; | |
479 | do { | |
864472e9 | 480 | err = _nfs4_do_open_reclaim(sp, state, dentry); |
202b50dc TM |
481 | if (err != -NFS4ERR_DELAY) |
482 | break; | |
483 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
484 | } while (exception.retry); |
485 | return err; | |
486 | } | |
487 | ||
864472e9 TM |
488 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
489 | { | |
490 | struct nfs_open_context *ctx; | |
491 | int ret; | |
492 | ||
493 | ctx = nfs4_state_find_open_context(state); | |
494 | if (IS_ERR(ctx)) | |
495 | return PTR_ERR(ctx); | |
496 | ret = nfs4_do_open_reclaim(sp, state, ctx->dentry); | |
497 | put_nfs_open_context(ctx); | |
498 | return ret; | |
499 | } | |
500 | ||
1da177e4 LT |
501 | static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) |
502 | { | |
503 | struct nfs4_state_owner *sp = state->owner; | |
e56e0b78 | 504 | struct nfs4_opendata *opendata; |
864472e9 | 505 | int ret; |
1da177e4 | 506 | |
1da177e4 | 507 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
864472e9 TM |
508 | return 0; |
509 | opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL); | |
e56e0b78 | 510 | if (opendata == NULL) |
864472e9 | 511 | return -ENOMEM; |
e56e0b78 | 512 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
e56e0b78 TM |
513 | memcpy(opendata->o_arg.u.delegation.data, state->stateid.data, |
514 | sizeof(opendata->o_arg.u.delegation.data)); | |
864472e9 | 515 | ret = nfs4_open_recover(opendata, state); |
e56e0b78 | 516 | nfs4_opendata_free(opendata); |
864472e9 | 517 | return ret; |
1da177e4 LT |
518 | } |
519 | ||
520 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
521 | { | |
522 | struct nfs4_exception exception = { }; | |
523 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
524 | int err; | |
525 | do { | |
526 | err = _nfs4_open_delegation_recall(dentry, state); | |
527 | switch (err) { | |
528 | case 0: | |
529 | return err; | |
530 | case -NFS4ERR_STALE_CLIENTID: | |
531 | case -NFS4ERR_STALE_STATEID: | |
532 | case -NFS4ERR_EXPIRED: | |
533 | /* Don't recall a delegation if it was lost */ | |
534 | nfs4_schedule_state_recovery(server->nfs4_state); | |
535 | return err; | |
536 | } | |
537 | err = nfs4_handle_exception(server, err, &exception); | |
538 | } while (exception.retry); | |
539 | return err; | |
540 | } | |
541 | ||
cdd4e68b | 542 | static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 543 | { |
cdd4e68b TM |
544 | struct nfs4_opendata *data = calldata; |
545 | struct rpc_message msg = { | |
546 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
547 | .rpc_argp = &data->c_arg, | |
548 | .rpc_resp = &data->c_res, | |
549 | .rpc_cred = data->owner->so_cred, | |
1da177e4 | 550 | }; |
cdd4e68b TM |
551 | rpc_call_setup(task, &msg, 0); |
552 | } | |
553 | ||
554 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
555 | { | |
556 | struct nfs4_opendata *data = calldata; | |
557 | ||
558 | data->rpc_status = task->tk_status; | |
559 | if (RPC_ASSASSINATED(task)) | |
560 | return; | |
561 | if (data->rpc_status == 0) | |
562 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, | |
563 | sizeof(data->o_res.stateid.data)); | |
564 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); | |
565 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); | |
566 | } | |
567 | ||
568 | static void nfs4_open_confirm_release(void *calldata) | |
569 | { | |
570 | struct nfs4_opendata *data = calldata; | |
571 | struct nfs4_state *state = NULL; | |
572 | ||
573 | /* If this request hasn't been cancelled, do nothing */ | |
574 | if (data->cancelled == 0) | |
575 | goto out_free; | |
576 | /* In case of error, no cleanup! */ | |
577 | if (data->rpc_status != 0) | |
578 | goto out_free; | |
579 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
580 | state = nfs4_opendata_to_nfs4_state(data); | |
581 | if (state != NULL) | |
582 | nfs4_close_state(state, data->o_arg.open_flags); | |
583 | out_free: | |
584 | nfs4_opendata_free(data); | |
585 | } | |
586 | ||
587 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
588 | .rpc_call_prepare = nfs4_open_confirm_prepare, | |
589 | .rpc_call_done = nfs4_open_confirm_done, | |
590 | .rpc_release = nfs4_open_confirm_release, | |
591 | }; | |
592 | ||
593 | /* | |
594 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
595 | */ | |
596 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
597 | { | |
598 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
599 | struct rpc_task *task; | |
1da177e4 LT |
600 | int status; |
601 | ||
cdd4e68b TM |
602 | atomic_inc(&data->count); |
603 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); | |
604 | if (IS_ERR(task)) { | |
605 | nfs4_opendata_free(data); | |
606 | return PTR_ERR(task); | |
607 | } | |
608 | status = nfs4_wait_for_completion_rpc_task(task); | |
609 | if (status != 0) { | |
610 | data->cancelled = 1; | |
611 | smp_wmb(); | |
612 | } else | |
613 | status = data->rpc_status; | |
614 | rpc_release_task(task); | |
1da177e4 LT |
615 | return status; |
616 | } | |
617 | ||
24ac23ab | 618 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 619 | { |
24ac23ab TM |
620 | struct nfs4_opendata *data = calldata; |
621 | struct nfs4_state_owner *sp = data->owner; | |
1da177e4 LT |
622 | struct rpc_message msg = { |
623 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
24ac23ab TM |
624 | .rpc_argp = &data->o_arg, |
625 | .rpc_resp = &data->o_res, | |
1da177e4 LT |
626 | .rpc_cred = sp->so_cred, |
627 | }; | |
24ac23ab TM |
628 | |
629 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
630 | return; | |
631 | /* Update sequence id. */ | |
632 | data->o_arg.id = sp->so_id; | |
633 | data->o_arg.clientid = sp->so_client->cl_clientid; | |
864472e9 TM |
634 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
635 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
24ac23ab TM |
636 | rpc_call_setup(task, &msg, 0); |
637 | } | |
1da177e4 | 638 | |
24ac23ab TM |
639 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
640 | { | |
641 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 642 | |
24ac23ab TM |
643 | data->rpc_status = task->tk_status; |
644 | if (RPC_ASSASSINATED(task)) | |
645 | return; | |
646 | if (task->tk_status == 0) { | |
647 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
648 | case S_IFREG: |
649 | break; | |
650 | case S_IFLNK: | |
24ac23ab | 651 | data->rpc_status = -ELOOP; |
6f926b5b TM |
652 | break; |
653 | case S_IFDIR: | |
24ac23ab | 654 | data->rpc_status = -EISDIR; |
6f926b5b TM |
655 | break; |
656 | default: | |
24ac23ab | 657 | data->rpc_status = -ENOTDIR; |
6f926b5b TM |
658 | } |
659 | } | |
24ac23ab TM |
660 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); |
661 | } | |
6f926b5b | 662 | |
24ac23ab TM |
663 | static void nfs4_open_release(void *calldata) |
664 | { | |
665 | struct nfs4_opendata *data = calldata; | |
666 | struct nfs4_state *state = NULL; | |
667 | ||
668 | /* If this request hasn't been cancelled, do nothing */ | |
669 | if (data->cancelled == 0) | |
670 | goto out_free; | |
671 | /* In case of error, no cleanup! */ | |
672 | if (data->rpc_status != 0) | |
673 | goto out_free; | |
674 | /* In case we need an open_confirm, no cleanup! */ | |
675 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
676 | goto out_free; | |
677 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
678 | state = nfs4_opendata_to_nfs4_state(data); | |
679 | if (state != NULL) | |
680 | nfs4_close_state(state, data->o_arg.open_flags); | |
681 | out_free: | |
682 | nfs4_opendata_free(data); | |
683 | } | |
684 | ||
685 | static const struct rpc_call_ops nfs4_open_ops = { | |
686 | .rpc_call_prepare = nfs4_open_prepare, | |
687 | .rpc_call_done = nfs4_open_done, | |
688 | .rpc_release = nfs4_open_release, | |
689 | }; | |
690 | ||
691 | /* | |
692 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
693 | */ | |
694 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
695 | { | |
696 | struct inode *dir = data->dir->d_inode; | |
697 | struct nfs_server *server = NFS_SERVER(dir); | |
698 | struct nfs_openargs *o_arg = &data->o_arg; | |
699 | struct nfs_openres *o_res = &data->o_res; | |
700 | struct rpc_task *task; | |
701 | int status; | |
702 | ||
703 | atomic_inc(&data->count); | |
704 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); | |
705 | if (IS_ERR(task)) { | |
706 | nfs4_opendata_free(data); | |
707 | return PTR_ERR(task); | |
708 | } | |
709 | status = nfs4_wait_for_completion_rpc_task(task); | |
710 | if (status != 0) { | |
711 | data->cancelled = 1; | |
712 | smp_wmb(); | |
713 | } else | |
714 | status = data->rpc_status; | |
715 | rpc_release_task(task); | |
1da177e4 | 716 | if (status != 0) |
24ac23ab TM |
717 | return status; |
718 | ||
56ae19f3 TM |
719 | if (o_arg->open_flags & O_CREAT) { |
720 | update_changeattr(dir, &o_res->cinfo); | |
721 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
722 | } else | |
723 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 724 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 725 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 726 | if (status != 0) |
24ac23ab | 727 | return status; |
1da177e4 | 728 | } |
24ac23ab | 729 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
1da177e4 | 730 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
24ac23ab TM |
731 | return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
732 | return 0; | |
1da177e4 LT |
733 | } |
734 | ||
735 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
736 | { | |
737 | struct nfs_access_entry cache; | |
738 | int mask = 0; | |
739 | int status; | |
740 | ||
741 | if (openflags & FMODE_READ) | |
742 | mask |= MAY_READ; | |
743 | if (openflags & FMODE_WRITE) | |
744 | mask |= MAY_WRITE; | |
745 | status = nfs_access_get_cached(inode, cred, &cache); | |
746 | if (status == 0) | |
747 | goto out; | |
748 | ||
749 | /* Be clever: ask server to check for all possible rights */ | |
750 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
751 | cache.cred = cred; | |
752 | cache.jiffies = jiffies; | |
753 | status = _nfs4_proc_access(inode, &cache); | |
754 | if (status != 0) | |
755 | return status; | |
756 | nfs_access_add_cache(inode, &cache); | |
757 | out: | |
758 | if ((cache.mask & mask) == mask) | |
759 | return 0; | |
760 | return -EACCES; | |
761 | } | |
762 | ||
763 | /* | |
764 | * OPEN_EXPIRED: | |
765 | * reclaim state on the server after a network partition. | |
766 | * Assumes caller holds the appropriate lock | |
767 | */ | |
768 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
769 | { | |
1da177e4 | 770 | struct inode *inode = state->inode; |
1da177e4 | 771 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
e56e0b78 | 772 | struct nfs4_opendata *opendata; |
24ac23ab | 773 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); |
864472e9 | 774 | int ret; |
1da177e4 LT |
775 | |
776 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
864472e9 TM |
777 | ret = _nfs4_do_access(inode, sp->so_cred, openflags); |
778 | if (ret < 0) | |
779 | return ret; | |
1da177e4 LT |
780 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
781 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
864472e9 | 782 | return 0; |
1da177e4 | 783 | } |
24ac23ab | 784 | opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL); |
e56e0b78 | 785 | if (opendata == NULL) |
864472e9 TM |
786 | return -ENOMEM; |
787 | ret = nfs4_open_recover(opendata, state); | |
788 | if (ret == -ESTALE) { | |
789 | /* Invalidate the state owner so we don't ever use it again */ | |
790 | nfs4_drop_state_owner(sp); | |
791 | d_drop(dentry); | |
1da177e4 | 792 | } |
e56e0b78 | 793 | nfs4_opendata_free(opendata); |
864472e9 | 794 | return ret; |
1da177e4 LT |
795 | } |
796 | ||
202b50dc TM |
797 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
798 | { | |
799 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
800 | struct nfs4_exception exception = { }; | |
801 | int err; | |
802 | ||
803 | do { | |
804 | err = _nfs4_open_expired(sp, state, dentry); | |
805 | if (err == -NFS4ERR_DELAY) | |
806 | nfs4_handle_exception(server, err, &exception); | |
807 | } while (exception.retry); | |
808 | return err; | |
809 | } | |
810 | ||
1da177e4 LT |
811 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
812 | { | |
1da177e4 | 813 | struct nfs_open_context *ctx; |
864472e9 | 814 | int ret; |
1da177e4 | 815 | |
864472e9 TM |
816 | ctx = nfs4_state_find_open_context(state); |
817 | if (IS_ERR(ctx)) | |
818 | return PTR_ERR(ctx); | |
819 | ret = nfs4_do_open_expired(sp, state, ctx->dentry); | |
820 | put_nfs_open_context(ctx); | |
821 | return ret; | |
1da177e4 LT |
822 | } |
823 | ||
824 | /* | |
24ac23ab | 825 | * Returns a referenced nfs4_state if there is an open delegation on the file |
1da177e4 LT |
826 | */ |
827 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
828 | { | |
829 | struct nfs_delegation *delegation; | |
830 | struct nfs_server *server = NFS_SERVER(inode); | |
831 | struct nfs4_client *clp = server->nfs4_state; | |
832 | struct nfs_inode *nfsi = NFS_I(inode); | |
833 | struct nfs4_state_owner *sp = NULL; | |
834 | struct nfs4_state *state = NULL; | |
835 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
836 | int err; | |
837 | ||
838 | /* Protect against reboot recovery - NOTE ORDER! */ | |
839 | down_read(&clp->cl_sem); | |
840 | /* Protect against delegation recall */ | |
841 | down_read(&nfsi->rwsem); | |
842 | delegation = NFS_I(inode)->delegation; | |
843 | err = -ENOENT; | |
844 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
845 | goto out_err; | |
846 | err = -ENOMEM; | |
847 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
848 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
849 | goto out_err; | |
850 | } | |
1da177e4 LT |
851 | state = nfs4_get_open_state(inode, sp); |
852 | if (state == NULL) | |
853 | goto out_err; | |
854 | ||
855 | err = -ENOENT; | |
856 | if ((state->state & open_flags) == open_flags) { | |
857 | spin_lock(&inode->i_lock); | |
e7616923 | 858 | update_open_stateflags(state, open_flags); |
1da177e4 LT |
859 | spin_unlock(&inode->i_lock); |
860 | goto out_ok; | |
861 | } else if (state->state != 0) | |
862 | goto out_err; | |
863 | ||
864 | lock_kernel(); | |
865 | err = _nfs4_do_access(inode, cred, open_flags); | |
866 | unlock_kernel(); | |
867 | if (err != 0) | |
868 | goto out_err; | |
869 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
870 | update_open_stateid(state, &delegation->stateid, open_flags); | |
871 | out_ok: | |
1da177e4 LT |
872 | nfs4_put_state_owner(sp); |
873 | up_read(&nfsi->rwsem); | |
874 | up_read(&clp->cl_sem); | |
1da177e4 LT |
875 | *res = state; |
876 | return 0; | |
877 | out_err: | |
878 | if (sp != NULL) { | |
879 | if (state != NULL) | |
880 | nfs4_put_open_state(state); | |
1da177e4 LT |
881 | nfs4_put_state_owner(sp); |
882 | } | |
883 | up_read(&nfsi->rwsem); | |
884 | up_read(&clp->cl_sem); | |
b8e5c4c2 TM |
885 | if (err != -EACCES) |
886 | nfs_inode_return_delegation(inode); | |
1da177e4 LT |
887 | return err; |
888 | } | |
889 | ||
890 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
891 | { | |
892 | struct nfs4_exception exception = { }; | |
893 | struct nfs4_state *res; | |
894 | int err; | |
895 | ||
896 | do { | |
897 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
898 | if (err == 0) | |
899 | break; | |
900 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
901 | err, &exception)); | |
902 | } while (exception.retry); | |
903 | return res; | |
904 | } | |
905 | ||
906 | /* | |
24ac23ab | 907 | * Returns a referenced nfs4_state |
1da177e4 LT |
908 | */ |
909 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
910 | { | |
911 | struct nfs4_state_owner *sp; | |
912 | struct nfs4_state *state = NULL; | |
913 | struct nfs_server *server = NFS_SERVER(dir); | |
914 | struct nfs4_client *clp = server->nfs4_state; | |
e56e0b78 | 915 | struct nfs4_opendata *opendata; |
1da177e4 | 916 | int status; |
1da177e4 LT |
917 | |
918 | /* Protect against reboot recovery conflicts */ | |
919 | down_read(&clp->cl_sem); | |
920 | status = -ENOMEM; | |
921 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
922 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
923 | goto out_err; | |
924 | } | |
e56e0b78 TM |
925 | opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr); |
926 | if (opendata == NULL) | |
927 | goto err_put_state_owner; | |
1da177e4 | 928 | |
24ac23ab | 929 | status = _nfs4_proc_open(opendata); |
1da177e4 | 930 | if (status != 0) |
e56e0b78 | 931 | goto err_opendata_free; |
1da177e4 LT |
932 | |
933 | status = -ENOMEM; | |
24ac23ab TM |
934 | state = nfs4_opendata_to_nfs4_state(opendata); |
935 | if (state == NULL) | |
e56e0b78 | 936 | goto err_opendata_free; |
e56e0b78 | 937 | if (opendata->o_res.delegation_type != 0) |
24ac23ab | 938 | nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); |
e56e0b78 | 939 | nfs4_opendata_free(opendata); |
1da177e4 LT |
940 | nfs4_put_state_owner(sp); |
941 | up_read(&clp->cl_sem); | |
942 | *res = state; | |
943 | return 0; | |
e56e0b78 TM |
944 | err_opendata_free: |
945 | nfs4_opendata_free(opendata); | |
946 | err_put_state_owner: | |
947 | nfs4_put_state_owner(sp); | |
1da177e4 | 948 | out_err: |
1da177e4 LT |
949 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ |
950 | up_read(&clp->cl_sem); | |
1da177e4 LT |
951 | *res = NULL; |
952 | return status; | |
953 | } | |
954 | ||
955 | ||
956 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
957 | { | |
958 | struct nfs4_exception exception = { }; | |
959 | struct nfs4_state *res; | |
960 | int status; | |
961 | ||
962 | do { | |
963 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); | |
964 | if (status == 0) | |
965 | break; | |
966 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
967 | * book-keeping w.r.t. state-changing operations | |
968 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
969 | * It is actually a sign of a bug on the client or on the server. | |
970 | * | |
971 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 972 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
973 | * have unhashed the old state_owner for us, and that we can |
974 | * therefore safely retry using a new one. We should still warn | |
975 | * the user though... | |
976 | */ | |
977 | if (status == -NFS4ERR_BAD_SEQID) { | |
978 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
979 | exception.retry = 1; | |
980 | continue; | |
981 | } | |
550f5747 TM |
982 | /* |
983 | * BAD_STATEID on OPEN means that the server cancelled our | |
984 | * state before it received the OPEN_CONFIRM. | |
985 | * Recover by retrying the request as per the discussion | |
986 | * on Page 181 of RFC3530. | |
987 | */ | |
988 | if (status == -NFS4ERR_BAD_STATEID) { | |
989 | exception.retry = 1; | |
990 | continue; | |
991 | } | |
1da177e4 LT |
992 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
993 | status, &exception)); | |
994 | } while (exception.retry); | |
995 | return res; | |
996 | } | |
997 | ||
998 | static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
999 | struct nfs_fh *fhandle, struct iattr *sattr, | |
1000 | struct nfs4_state *state) | |
1001 | { | |
1002 | struct nfs_setattrargs arg = { | |
1003 | .fh = fhandle, | |
1004 | .iap = sattr, | |
1005 | .server = server, | |
1006 | .bitmask = server->attr_bitmask, | |
1007 | }; | |
1008 | struct nfs_setattrres res = { | |
1009 | .fattr = fattr, | |
1010 | .server = server, | |
1011 | }; | |
1012 | struct rpc_message msg = { | |
1013 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1014 | .rpc_argp = &arg, | |
1015 | .rpc_resp = &res, | |
1016 | }; | |
65e4308d | 1017 | int status; |
1da177e4 | 1018 | |
0e574af1 | 1019 | nfs_fattr_init(fattr); |
1da177e4 | 1020 | |
08e9eac4 | 1021 | if (state != NULL) { |
1da177e4 | 1022 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
1023 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1024 | } else | |
1da177e4 LT |
1025 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1026 | ||
65e4308d TM |
1027 | status = rpc_call_sync(server->client, &msg, 0); |
1028 | return status; | |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
1032 | struct nfs_fh *fhandle, struct iattr *sattr, | |
1033 | struct nfs4_state *state) | |
1034 | { | |
1035 | struct nfs4_exception exception = { }; | |
1036 | int err; | |
1037 | do { | |
1038 | err = nfs4_handle_exception(server, | |
1039 | _nfs4_do_setattr(server, fattr, fhandle, sattr, | |
1040 | state), | |
1041 | &exception); | |
1042 | } while (exception.retry); | |
1043 | return err; | |
1044 | } | |
1045 | ||
1046 | struct nfs4_closedata { | |
1047 | struct inode *inode; | |
1048 | struct nfs4_state *state; | |
1049 | struct nfs_closeargs arg; | |
1050 | struct nfs_closeres res; | |
516a6af6 | 1051 | struct nfs_fattr fattr; |
1da177e4 LT |
1052 | }; |
1053 | ||
963d8fe5 | 1054 | static void nfs4_free_closedata(void *data) |
9512135d | 1055 | { |
963d8fe5 TM |
1056 | struct nfs4_closedata *calldata = data; |
1057 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1058 | |
1059 | nfs4_put_open_state(calldata->state); | |
1060 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1061 | nfs4_put_state_owner(sp); |
9512135d TM |
1062 | kfree(calldata); |
1063 | } | |
1064 | ||
963d8fe5 | 1065 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1066 | { |
963d8fe5 | 1067 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1068 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1069 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1070 | ||
4ce70ada TM |
1071 | if (RPC_ASSASSINATED(task)) |
1072 | return; | |
1da177e4 LT |
1073 | /* hmm. we are done with the inode, and in the process of freeing |
1074 | * the state_owner. we keep this around to process errors | |
1075 | */ | |
cee54fc9 | 1076 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
1077 | switch (task->tk_status) { |
1078 | case 0: | |
1079 | memcpy(&state->stateid, &calldata->res.stateid, | |
1080 | sizeof(state->stateid)); | |
1081 | break; | |
1082 | case -NFS4ERR_STALE_STATEID: | |
1083 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
1084 | nfs4_schedule_state_recovery(server->nfs4_state); |
1085 | break; | |
1086 | default: | |
1087 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
1088 | rpc_restart_call(task); | |
1089 | return; | |
1090 | } | |
1091 | } | |
516a6af6 | 1092 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1093 | } |
1094 | ||
4ce70ada | 1095 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1096 | { |
4ce70ada | 1097 | struct nfs4_closedata *calldata = data; |
9512135d | 1098 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1099 | struct rpc_message msg = { |
1100 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1101 | .rpc_argp = &calldata->arg, | |
1102 | .rpc_resp = &calldata->res, | |
9512135d | 1103 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 1104 | }; |
4cecb76f | 1105 | int mode = 0, old_mode; |
9512135d | 1106 | |
963d8fe5 | 1107 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1108 | return; |
9512135d TM |
1109 | /* Recalculate the new open mode in case someone reopened the file |
1110 | * while we were waiting in line to be scheduled. | |
1111 | */ | |
4cecb76f TM |
1112 | spin_lock(&state->owner->so_lock); |
1113 | spin_lock(&calldata->inode->i_lock); | |
1114 | mode = old_mode = state->state; | |
e7616923 TM |
1115 | if (state->n_rdwr == 0) { |
1116 | if (state->n_rdonly == 0) | |
1117 | mode &= ~FMODE_READ; | |
1118 | if (state->n_wronly == 0) | |
1119 | mode &= ~FMODE_WRITE; | |
1120 | } | |
4cecb76f TM |
1121 | nfs4_state_set_mode_locked(state, mode); |
1122 | spin_unlock(&calldata->inode->i_lock); | |
1123 | spin_unlock(&state->owner->so_lock); | |
1124 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
963d8fe5 TM |
1125 | /* Note: exit _without_ calling nfs4_close_done */ |
1126 | task->tk_action = NULL; | |
9512135d TM |
1127 | return; |
1128 | } | |
516a6af6 | 1129 | nfs_fattr_init(calldata->res.fattr); |
9512135d | 1130 | if (mode != 0) |
1da177e4 | 1131 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d TM |
1132 | calldata->arg.open_flags = mode; |
1133 | rpc_call_setup(task, &msg, 0); | |
1da177e4 LT |
1134 | } |
1135 | ||
963d8fe5 | 1136 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1137 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1138 | .rpc_call_done = nfs4_close_done, |
1139 | .rpc_release = nfs4_free_closedata, | |
1140 | }; | |
1141 | ||
1da177e4 LT |
1142 | /* |
1143 | * It is possible for data to be read/written from a mem-mapped file | |
1144 | * after the sys_close call (which hits the vfs layer as a flush). | |
1145 | * This means that we can't safely call nfsv4 close on a file until | |
1146 | * the inode is cleared. This in turn means that we are not good | |
1147 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1148 | * share state even when we are done with one of the three share | |
1149 | * stateid's in the inode. | |
1150 | * | |
1151 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1152 | */ | |
4cecb76f | 1153 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state) |
1da177e4 | 1154 | { |
516a6af6 | 1155 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1156 | struct nfs4_closedata *calldata; |
9512135d | 1157 | int status = -ENOMEM; |
1da177e4 | 1158 | |
9512135d | 1159 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1160 | if (calldata == NULL) |
9512135d | 1161 | goto out; |
1da177e4 LT |
1162 | calldata->inode = inode; |
1163 | calldata->state = state; | |
1164 | calldata->arg.fh = NFS_FH(inode); | |
9512135d | 1165 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 1166 | /* Serialization for the sequence id */ |
cee54fc9 | 1167 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1168 | if (calldata->arg.seqid == NULL) |
1169 | goto out_free_calldata; | |
516a6af6 TM |
1170 | calldata->arg.bitmask = server->attr_bitmask; |
1171 | calldata->res.fattr = &calldata->fattr; | |
1172 | calldata->res.server = server; | |
9512135d | 1173 | |
4ce70ada | 1174 | status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); |
9512135d TM |
1175 | if (status == 0) |
1176 | goto out; | |
1177 | ||
1178 | nfs_free_seqid(calldata->arg.seqid); | |
1179 | out_free_calldata: | |
1180 | kfree(calldata); | |
1181 | out: | |
1182 | return status; | |
1da177e4 LT |
1183 | } |
1184 | ||
02a913a7 TM |
1185 | static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) |
1186 | { | |
1187 | struct file *filp; | |
1188 | ||
1189 | filp = lookup_instantiate_filp(nd, dentry, NULL); | |
1190 | if (!IS_ERR(filp)) { | |
1191 | struct nfs_open_context *ctx; | |
1192 | ctx = (struct nfs_open_context *)filp->private_data; | |
1193 | ctx->state = state; | |
1194 | } else | |
1195 | nfs4_close_state(state, nd->intent.open.flags); | |
1196 | } | |
1197 | ||
1198 | struct dentry * | |
1da177e4 LT |
1199 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1200 | { | |
1201 | struct iattr attr; | |
1202 | struct rpc_cred *cred; | |
1203 | struct nfs4_state *state; | |
02a913a7 | 1204 | struct dentry *res; |
1da177e4 LT |
1205 | |
1206 | if (nd->flags & LOOKUP_CREATE) { | |
1207 | attr.ia_mode = nd->intent.open.create_mode; | |
1208 | attr.ia_valid = ATTR_MODE; | |
1209 | if (!IS_POSIXACL(dir)) | |
1210 | attr.ia_mode &= ~current->fs->umask; | |
1211 | } else { | |
1212 | attr.ia_valid = 0; | |
1213 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1214 | } | |
1215 | ||
1216 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1217 | if (IS_ERR(cred)) | |
02a913a7 | 1218 | return (struct dentry *)cred; |
1da177e4 LT |
1219 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); |
1220 | put_rpccred(cred); | |
02a913a7 TM |
1221 | if (IS_ERR(state)) { |
1222 | if (PTR_ERR(state) == -ENOENT) | |
1223 | d_add(dentry, NULL); | |
1224 | return (struct dentry *)state; | |
1225 | } | |
24ac23ab | 1226 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 TM |
1227 | if (res != NULL) |
1228 | dentry = res; | |
1229 | nfs4_intent_set_file(nd, dentry, state); | |
1230 | return res; | |
1da177e4 LT |
1231 | } |
1232 | ||
1233 | int | |
02a913a7 | 1234 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 LT |
1235 | { |
1236 | struct rpc_cred *cred; | |
1237 | struct nfs4_state *state; | |
1da177e4 LT |
1238 | |
1239 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1240 | if (IS_ERR(cred)) | |
1241 | return PTR_ERR(cred); | |
1242 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1243 | if (IS_ERR(state)) | |
1244 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); | |
1245 | put_rpccred(cred); | |
02a913a7 TM |
1246 | if (IS_ERR(state)) { |
1247 | switch (PTR_ERR(state)) { | |
1248 | case -EPERM: | |
1249 | case -EACCES: | |
1250 | case -EDQUOT: | |
1251 | case -ENOSPC: | |
1252 | case -EROFS: | |
1253 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1254 | return 1; | |
1255 | case -ENOENT: | |
1256 | if (dentry->d_inode == NULL) | |
1257 | return 1; | |
1258 | } | |
1259 | goto out_drop; | |
1260 | } | |
24ac23ab | 1261 | if (state->inode == dentry->d_inode) { |
02a913a7 | 1262 | nfs4_intent_set_file(nd, dentry, state); |
1da177e4 LT |
1263 | return 1; |
1264 | } | |
1da177e4 | 1265 | nfs4_close_state(state, openflags); |
02a913a7 TM |
1266 | out_drop: |
1267 | d_drop(dentry); | |
1da177e4 LT |
1268 | return 0; |
1269 | } | |
1270 | ||
1271 | ||
1272 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1273 | { | |
1274 | struct nfs4_server_caps_res res = {}; | |
1275 | struct rpc_message msg = { | |
1276 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1277 | .rpc_argp = fhandle, | |
1278 | .rpc_resp = &res, | |
1279 | }; | |
1280 | int status; | |
1281 | ||
1282 | status = rpc_call_sync(server->client, &msg, 0); | |
1283 | if (status == 0) { | |
1284 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1285 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1286 | server->caps |= NFS_CAP_ACLS; | |
1287 | if (res.has_links != 0) | |
1288 | server->caps |= NFS_CAP_HARDLINKS; | |
1289 | if (res.has_symlinks != 0) | |
1290 | server->caps |= NFS_CAP_SYMLINKS; | |
1291 | server->acl_bitmask = res.acl_bitmask; | |
1292 | } | |
1293 | return status; | |
1294 | } | |
1295 | ||
1296 | static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1297 | { | |
1298 | struct nfs4_exception exception = { }; | |
1299 | int err; | |
1300 | do { | |
1301 | err = nfs4_handle_exception(server, | |
1302 | _nfs4_server_capabilities(server, fhandle), | |
1303 | &exception); | |
1304 | } while (exception.retry); | |
1305 | return err; | |
1306 | } | |
1307 | ||
1308 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1309 | struct nfs_fsinfo *info) | |
1310 | { | |
1da177e4 LT |
1311 | struct nfs4_lookup_root_arg args = { |
1312 | .bitmask = nfs4_fattr_bitmap, | |
1313 | }; | |
1314 | struct nfs4_lookup_res res = { | |
1315 | .server = server, | |
0e574af1 | 1316 | .fattr = info->fattr, |
1da177e4 LT |
1317 | .fh = fhandle, |
1318 | }; | |
1319 | struct rpc_message msg = { | |
1320 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1321 | .rpc_argp = &args, | |
1322 | .rpc_resp = &res, | |
1323 | }; | |
0e574af1 | 1324 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1325 | return rpc_call_sync(server->client, &msg, 0); |
1326 | } | |
1327 | ||
1328 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1329 | struct nfs_fsinfo *info) | |
1330 | { | |
1331 | struct nfs4_exception exception = { }; | |
1332 | int err; | |
1333 | do { | |
1334 | err = nfs4_handle_exception(server, | |
1335 | _nfs4_lookup_root(server, fhandle, info), | |
1336 | &exception); | |
1337 | } while (exception.retry); | |
1338 | return err; | |
1339 | } | |
1340 | ||
1341 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1342 | struct nfs_fsinfo *info) | |
1343 | { | |
1344 | struct nfs_fattr * fattr = info->fattr; | |
1345 | unsigned char * p; | |
1346 | struct qstr q; | |
1347 | struct nfs4_lookup_arg args = { | |
1348 | .dir_fh = fhandle, | |
1349 | .name = &q, | |
1350 | .bitmask = nfs4_fattr_bitmap, | |
1351 | }; | |
1352 | struct nfs4_lookup_res res = { | |
1353 | .server = server, | |
1354 | .fattr = fattr, | |
1355 | .fh = fhandle, | |
1356 | }; | |
1357 | struct rpc_message msg = { | |
1358 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1359 | .rpc_argp = &args, | |
1360 | .rpc_resp = &res, | |
1361 | }; | |
1362 | int status; | |
1363 | ||
1364 | /* | |
1365 | * Now we do a separate LOOKUP for each component of the mount path. | |
1366 | * The LOOKUPs are done separately so that we can conveniently | |
1367 | * catch an ERR_WRONGSEC if it occurs along the way... | |
1368 | */ | |
1369 | status = nfs4_lookup_root(server, fhandle, info); | |
1370 | if (status) | |
1371 | goto out; | |
1372 | ||
1373 | p = server->mnt_path; | |
1374 | for (;;) { | |
1375 | struct nfs4_exception exception = { }; | |
1376 | ||
1377 | while (*p == '/') | |
1378 | p++; | |
1379 | if (!*p) | |
1380 | break; | |
1381 | q.name = p; | |
1382 | while (*p && (*p != '/')) | |
1383 | p++; | |
1384 | q.len = p - q.name; | |
1385 | ||
1386 | do { | |
0e574af1 | 1387 | nfs_fattr_init(fattr); |
1da177e4 LT |
1388 | status = nfs4_handle_exception(server, |
1389 | rpc_call_sync(server->client, &msg, 0), | |
1390 | &exception); | |
1391 | } while (exception.retry); | |
1392 | if (status == 0) | |
1393 | continue; | |
1394 | if (status == -ENOENT) { | |
1395 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); | |
1396 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); | |
1397 | } | |
1398 | break; | |
1399 | } | |
1400 | if (status == 0) | |
1401 | status = nfs4_server_capabilities(server, fhandle); | |
1402 | if (status == 0) | |
1403 | status = nfs4_do_fsinfo(server, fhandle, info); | |
1404 | out: | |
1405 | return status; | |
1406 | } | |
1407 | ||
1408 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1409 | { | |
1410 | struct nfs4_getattr_arg args = { | |
1411 | .fh = fhandle, | |
1412 | .bitmask = server->attr_bitmask, | |
1413 | }; | |
1414 | struct nfs4_getattr_res res = { | |
1415 | .fattr = fattr, | |
1416 | .server = server, | |
1417 | }; | |
1418 | struct rpc_message msg = { | |
1419 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1420 | .rpc_argp = &args, | |
1421 | .rpc_resp = &res, | |
1422 | }; | |
1423 | ||
0e574af1 | 1424 | nfs_fattr_init(fattr); |
1da177e4 LT |
1425 | return rpc_call_sync(server->client, &msg, 0); |
1426 | } | |
1427 | ||
1428 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1429 | { | |
1430 | struct nfs4_exception exception = { }; | |
1431 | int err; | |
1432 | do { | |
1433 | err = nfs4_handle_exception(server, | |
1434 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1435 | &exception); | |
1436 | } while (exception.retry); | |
1437 | return err; | |
1438 | } | |
1439 | ||
1440 | /* | |
1441 | * The file is not closed if it is opened due to the a request to change | |
1442 | * the size of the file. The open call will not be needed once the | |
1443 | * VFS layer lookup-intents are implemented. | |
1444 | * | |
1445 | * Close is called when the inode is destroyed. | |
1446 | * If we haven't opened the file for O_WRONLY, we | |
1447 | * need to in the size_change case to obtain a stateid. | |
1448 | * | |
1449 | * Got race? | |
1450 | * Because OPEN is always done by name in nfsv4, it is | |
1451 | * possible that we opened a different file by the same | |
1452 | * name. We can recognize this race condition, but we | |
1453 | * can't do anything about it besides returning an error. | |
1454 | * | |
1455 | * This will be fixed with VFS changes (lookup-intent). | |
1456 | */ | |
1457 | static int | |
1458 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1459 | struct iattr *sattr) | |
1460 | { | |
08e9eac4 TM |
1461 | struct rpc_cred *cred; |
1462 | struct inode *inode = dentry->d_inode; | |
d530838b TM |
1463 | struct nfs_open_context *ctx; |
1464 | struct nfs4_state *state = NULL; | |
1da177e4 LT |
1465 | int status; |
1466 | ||
0e574af1 | 1467 | nfs_fattr_init(fattr); |
1da177e4 | 1468 | |
08e9eac4 TM |
1469 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
1470 | if (IS_ERR(cred)) | |
1471 | return PTR_ERR(cred); | |
d530838b TM |
1472 | |
1473 | /* Search for an existing open(O_WRITE) file */ | |
1474 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1475 | if (ctx != NULL) | |
1476 | state = ctx->state; | |
08e9eac4 | 1477 | |
1da177e4 LT |
1478 | status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
1479 | NFS_FH(inode), sattr, state); | |
65e4308d TM |
1480 | if (status == 0) |
1481 | nfs_setattr_update_inode(inode, sattr); | |
d530838b TM |
1482 | if (ctx != NULL) |
1483 | put_nfs_open_context(ctx); | |
08e9eac4 | 1484 | put_rpccred(cred); |
1da177e4 LT |
1485 | return status; |
1486 | } | |
1487 | ||
1488 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
1489 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1490 | { | |
1491 | int status; | |
1492 | struct nfs_server *server = NFS_SERVER(dir); | |
1493 | struct nfs4_lookup_arg args = { | |
1494 | .bitmask = server->attr_bitmask, | |
1495 | .dir_fh = NFS_FH(dir), | |
1496 | .name = name, | |
1497 | }; | |
1498 | struct nfs4_lookup_res res = { | |
1499 | .server = server, | |
1500 | .fattr = fattr, | |
1501 | .fh = fhandle, | |
1502 | }; | |
1503 | struct rpc_message msg = { | |
1504 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1505 | .rpc_argp = &args, | |
1506 | .rpc_resp = &res, | |
1507 | }; | |
1508 | ||
0e574af1 | 1509 | nfs_fattr_init(fattr); |
1da177e4 LT |
1510 | |
1511 | dprintk("NFS call lookup %s\n", name->name); | |
1512 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1513 | dprintk("NFS reply lookup: %d\n", status); | |
1514 | return status; | |
1515 | } | |
1516 | ||
1517 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1518 | { | |
1519 | struct nfs4_exception exception = { }; | |
1520 | int err; | |
1521 | do { | |
1522 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1523 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1524 | &exception); | |
1525 | } while (exception.retry); | |
1526 | return err; | |
1527 | } | |
1528 | ||
1529 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1530 | { | |
1531 | struct nfs4_accessargs args = { | |
1532 | .fh = NFS_FH(inode), | |
1533 | }; | |
1534 | struct nfs4_accessres res = { 0 }; | |
1535 | struct rpc_message msg = { | |
1536 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1537 | .rpc_argp = &args, | |
1538 | .rpc_resp = &res, | |
1539 | .rpc_cred = entry->cred, | |
1540 | }; | |
1541 | int mode = entry->mask; | |
1542 | int status; | |
1543 | ||
1544 | /* | |
1545 | * Determine which access bits we want to ask for... | |
1546 | */ | |
1547 | if (mode & MAY_READ) | |
1548 | args.access |= NFS4_ACCESS_READ; | |
1549 | if (S_ISDIR(inode->i_mode)) { | |
1550 | if (mode & MAY_WRITE) | |
1551 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1552 | if (mode & MAY_EXEC) | |
1553 | args.access |= NFS4_ACCESS_LOOKUP; | |
1554 | } else { | |
1555 | if (mode & MAY_WRITE) | |
1556 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1557 | if (mode & MAY_EXEC) | |
1558 | args.access |= NFS4_ACCESS_EXECUTE; | |
1559 | } | |
1560 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1561 | if (!status) { | |
1562 | entry->mask = 0; | |
1563 | if (res.access & NFS4_ACCESS_READ) | |
1564 | entry->mask |= MAY_READ; | |
1565 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1566 | entry->mask |= MAY_WRITE; | |
1567 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1568 | entry->mask |= MAY_EXEC; | |
1569 | } | |
1570 | return status; | |
1571 | } | |
1572 | ||
1573 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1574 | { | |
1575 | struct nfs4_exception exception = { }; | |
1576 | int err; | |
1577 | do { | |
1578 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1579 | _nfs4_proc_access(inode, entry), | |
1580 | &exception); | |
1581 | } while (exception.retry); | |
1582 | return err; | |
1583 | } | |
1584 | ||
1585 | /* | |
1586 | * TODO: For the time being, we don't try to get any attributes | |
1587 | * along with any of the zero-copy operations READ, READDIR, | |
1588 | * READLINK, WRITE. | |
1589 | * | |
1590 | * In the case of the first three, we want to put the GETATTR | |
1591 | * after the read-type operation -- this is because it is hard | |
1592 | * to predict the length of a GETATTR response in v4, and thus | |
1593 | * align the READ data correctly. This means that the GETATTR | |
1594 | * may end up partially falling into the page cache, and we should | |
1595 | * shift it into the 'tail' of the xdr_buf before processing. | |
1596 | * To do this efficiently, we need to know the total length | |
1597 | * of data received, which doesn't seem to be available outside | |
1598 | * of the RPC layer. | |
1599 | * | |
1600 | * In the case of WRITE, we also want to put the GETATTR after | |
1601 | * the operation -- in this case because we want to make sure | |
1602 | * we get the post-operation mtime and size. This means that | |
1603 | * we can't use xdr_encode_pages() as written: we need a variant | |
1604 | * of it which would leave room in the 'tail' iovec. | |
1605 | * | |
1606 | * Both of these changes to the XDR layer would in fact be quite | |
1607 | * minor, but I decided to leave them for a subsequent patch. | |
1608 | */ | |
1609 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1610 | unsigned int pgbase, unsigned int pglen) | |
1611 | { | |
1612 | struct nfs4_readlink args = { | |
1613 | .fh = NFS_FH(inode), | |
1614 | .pgbase = pgbase, | |
1615 | .pglen = pglen, | |
1616 | .pages = &page, | |
1617 | }; | |
1618 | struct rpc_message msg = { | |
1619 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1620 | .rpc_argp = &args, | |
1621 | .rpc_resp = NULL, | |
1622 | }; | |
1623 | ||
1624 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1625 | } | |
1626 | ||
1627 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1628 | unsigned int pgbase, unsigned int pglen) | |
1629 | { | |
1630 | struct nfs4_exception exception = { }; | |
1631 | int err; | |
1632 | do { | |
1633 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1634 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1635 | &exception); | |
1636 | } while (exception.retry); | |
1637 | return err; | |
1638 | } | |
1639 | ||
1640 | static int _nfs4_proc_read(struct nfs_read_data *rdata) | |
1641 | { | |
1642 | int flags = rdata->flags; | |
1643 | struct inode *inode = rdata->inode; | |
1644 | struct nfs_fattr *fattr = rdata->res.fattr; | |
1645 | struct nfs_server *server = NFS_SERVER(inode); | |
1646 | struct rpc_message msg = { | |
1647 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
1648 | .rpc_argp = &rdata->args, | |
1649 | .rpc_resp = &rdata->res, | |
1650 | .rpc_cred = rdata->cred, | |
1651 | }; | |
1652 | unsigned long timestamp = jiffies; | |
1653 | int status; | |
1654 | ||
1655 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
1656 | (long long) rdata->args.offset); | |
1657 | ||
0e574af1 | 1658 | nfs_fattr_init(fattr); |
1da177e4 LT |
1659 | status = rpc_call_sync(server->client, &msg, flags); |
1660 | if (!status) | |
1661 | renew_lease(server, timestamp); | |
1662 | dprintk("NFS reply read: %d\n", status); | |
1663 | return status; | |
1664 | } | |
1665 | ||
1666 | static int nfs4_proc_read(struct nfs_read_data *rdata) | |
1667 | { | |
1668 | struct nfs4_exception exception = { }; | |
1669 | int err; | |
1670 | do { | |
1671 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), | |
1672 | _nfs4_proc_read(rdata), | |
1673 | &exception); | |
1674 | } while (exception.retry); | |
1675 | return err; | |
1676 | } | |
1677 | ||
1678 | static int _nfs4_proc_write(struct nfs_write_data *wdata) | |
1679 | { | |
1680 | int rpcflags = wdata->flags; | |
1681 | struct inode *inode = wdata->inode; | |
1682 | struct nfs_fattr *fattr = wdata->res.fattr; | |
1683 | struct nfs_server *server = NFS_SERVER(inode); | |
1684 | struct rpc_message msg = { | |
1685 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
1686 | .rpc_argp = &wdata->args, | |
1687 | .rpc_resp = &wdata->res, | |
1688 | .rpc_cred = wdata->cred, | |
1689 | }; | |
1690 | int status; | |
1691 | ||
1692 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
1693 | (long long) wdata->args.offset); | |
1694 | ||
3b6efee9 TM |
1695 | wdata->args.bitmask = server->attr_bitmask; |
1696 | wdata->res.server = server; | |
0e574af1 | 1697 | nfs_fattr_init(fattr); |
1da177e4 LT |
1698 | status = rpc_call_sync(server->client, &msg, rpcflags); |
1699 | dprintk("NFS reply write: %d\n", status); | |
3b6efee9 TM |
1700 | if (status < 0) |
1701 | return status; | |
1702 | nfs_post_op_update_inode(inode, fattr); | |
1703 | return wdata->res.count; | |
1da177e4 LT |
1704 | } |
1705 | ||
1706 | static int nfs4_proc_write(struct nfs_write_data *wdata) | |
1707 | { | |
1708 | struct nfs4_exception exception = { }; | |
1709 | int err; | |
1710 | do { | |
1711 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), | |
1712 | _nfs4_proc_write(wdata), | |
1713 | &exception); | |
1714 | } while (exception.retry); | |
1715 | return err; | |
1716 | } | |
1717 | ||
1718 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) | |
1719 | { | |
1720 | struct inode *inode = cdata->inode; | |
1721 | struct nfs_fattr *fattr = cdata->res.fattr; | |
1722 | struct nfs_server *server = NFS_SERVER(inode); | |
1723 | struct rpc_message msg = { | |
1724 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
1725 | .rpc_argp = &cdata->args, | |
1726 | .rpc_resp = &cdata->res, | |
1727 | .rpc_cred = cdata->cred, | |
1728 | }; | |
1729 | int status; | |
1730 | ||
1731 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
1732 | (long long) cdata->args.offset); | |
1733 | ||
3b6efee9 TM |
1734 | cdata->args.bitmask = server->attr_bitmask; |
1735 | cdata->res.server = server; | |
0e574af1 | 1736 | nfs_fattr_init(fattr); |
1da177e4 LT |
1737 | status = rpc_call_sync(server->client, &msg, 0); |
1738 | dprintk("NFS reply commit: %d\n", status); | |
3b6efee9 TM |
1739 | if (status >= 0) |
1740 | nfs_post_op_update_inode(inode, fattr); | |
1da177e4 LT |
1741 | return status; |
1742 | } | |
1743 | ||
1744 | static int nfs4_proc_commit(struct nfs_write_data *cdata) | |
1745 | { | |
1746 | struct nfs4_exception exception = { }; | |
1747 | int err; | |
1748 | do { | |
1749 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), | |
1750 | _nfs4_proc_commit(cdata), | |
1751 | &exception); | |
1752 | } while (exception.retry); | |
1753 | return err; | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * Got race? | |
1758 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1759 | * Until then, this create/open method is prone to inefficiency and race | |
1760 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1761 | * placed on the wire. | |
1762 | * | |
1763 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1764 | * The file will be opened again in the subsequent VFS open call | |
1765 | * (nfs4_proc_file_open). | |
1766 | * | |
1767 | * The open for read will just hang around to be used by any process that | |
1768 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1769 | */ | |
1770 | ||
1771 | static int | |
1772 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1773 | int flags, struct nameidata *nd) |
1da177e4 LT |
1774 | { |
1775 | struct nfs4_state *state; | |
1776 | struct rpc_cred *cred; | |
1777 | int status = 0; | |
1778 | ||
1779 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1780 | if (IS_ERR(cred)) { | |
1781 | status = PTR_ERR(cred); | |
1782 | goto out; | |
1783 | } | |
1784 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); | |
1785 | put_rpccred(cred); | |
1786 | if (IS_ERR(state)) { | |
1787 | status = PTR_ERR(state); | |
1788 | goto out; | |
1789 | } | |
24ac23ab | 1790 | d_instantiate(dentry, igrab(state->inode)); |
1da177e4 LT |
1791 | if (flags & O_EXCL) { |
1792 | struct nfs_fattr fattr; | |
1793 | status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, | |
1794 | NFS_FH(state->inode), sattr, state); | |
02a913a7 | 1795 | if (status == 0) |
65e4308d | 1796 | nfs_setattr_update_inode(state->inode, sattr); |
02a913a7 TM |
1797 | } |
1798 | if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) | |
1799 | nfs4_intent_set_file(nd, dentry, state); | |
1800 | else | |
1801 | nfs4_close_state(state, flags); | |
1da177e4 LT |
1802 | out: |
1803 | return status; | |
1804 | } | |
1805 | ||
1806 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1807 | { | |
16e42959 | 1808 | struct nfs_server *server = NFS_SERVER(dir); |
1da177e4 LT |
1809 | struct nfs4_remove_arg args = { |
1810 | .fh = NFS_FH(dir), | |
1811 | .name = name, | |
16e42959 TM |
1812 | .bitmask = server->attr_bitmask, |
1813 | }; | |
1814 | struct nfs_fattr dir_attr; | |
1815 | struct nfs4_remove_res res = { | |
1816 | .server = server, | |
1817 | .dir_attr = &dir_attr, | |
1da177e4 | 1818 | }; |
1da177e4 LT |
1819 | struct rpc_message msg = { |
1820 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1821 | .rpc_argp = &args, | |
1822 | .rpc_resp = &res, | |
1823 | }; | |
1824 | int status; | |
1825 | ||
16e42959 TM |
1826 | nfs_fattr_init(res.dir_attr); |
1827 | status = rpc_call_sync(server->client, &msg, 0); | |
1828 | if (status == 0) { | |
1829 | update_changeattr(dir, &res.cinfo); | |
1830 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1831 | } | |
1da177e4 LT |
1832 | return status; |
1833 | } | |
1834 | ||
1835 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1836 | { | |
1837 | struct nfs4_exception exception = { }; | |
1838 | int err; | |
1839 | do { | |
1840 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1841 | _nfs4_proc_remove(dir, name), | |
1842 | &exception); | |
1843 | } while (exception.retry); | |
1844 | return err; | |
1845 | } | |
1846 | ||
1847 | struct unlink_desc { | |
1848 | struct nfs4_remove_arg args; | |
16e42959 TM |
1849 | struct nfs4_remove_res res; |
1850 | struct nfs_fattr dir_attr; | |
1da177e4 LT |
1851 | }; |
1852 | ||
1853 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1854 | struct qstr *name) | |
1855 | { | |
16e42959 | 1856 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
1da177e4 LT |
1857 | struct unlink_desc *up; |
1858 | ||
1859 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); | |
1860 | if (!up) | |
1861 | return -ENOMEM; | |
1862 | ||
1863 | up->args.fh = NFS_FH(dir->d_inode); | |
1864 | up->args.name = name; | |
16e42959 TM |
1865 | up->args.bitmask = server->attr_bitmask; |
1866 | up->res.server = server; | |
1867 | up->res.dir_attr = &up->dir_attr; | |
1da177e4 LT |
1868 | |
1869 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1870 | msg->rpc_argp = &up->args; | |
1871 | msg->rpc_resp = &up->res; | |
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1876 | { | |
1877 | struct rpc_message *msg = &task->tk_msg; | |
1878 | struct unlink_desc *up; | |
1879 | ||
1880 | if (msg->rpc_resp != NULL) { | |
1881 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
16e42959 TM |
1882 | update_changeattr(dir->d_inode, &up->res.cinfo); |
1883 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1da177e4 LT |
1884 | kfree(up); |
1885 | msg->rpc_resp = NULL; | |
1886 | msg->rpc_argp = NULL; | |
1887 | } | |
1888 | return 0; | |
1889 | } | |
1890 | ||
1891 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1892 | struct inode *new_dir, struct qstr *new_name) | |
1893 | { | |
6caf2c82 | 1894 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
1895 | struct nfs4_rename_arg arg = { |
1896 | .old_dir = NFS_FH(old_dir), | |
1897 | .new_dir = NFS_FH(new_dir), | |
1898 | .old_name = old_name, | |
1899 | .new_name = new_name, | |
6caf2c82 TM |
1900 | .bitmask = server->attr_bitmask, |
1901 | }; | |
1902 | struct nfs_fattr old_fattr, new_fattr; | |
1903 | struct nfs4_rename_res res = { | |
1904 | .server = server, | |
1905 | .old_fattr = &old_fattr, | |
1906 | .new_fattr = &new_fattr, | |
1da177e4 | 1907 | }; |
1da177e4 LT |
1908 | struct rpc_message msg = { |
1909 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1910 | .rpc_argp = &arg, | |
1911 | .rpc_resp = &res, | |
1912 | }; | |
1913 | int status; | |
1914 | ||
6caf2c82 TM |
1915 | nfs_fattr_init(res.old_fattr); |
1916 | nfs_fattr_init(res.new_fattr); | |
1917 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
1918 | |
1919 | if (!status) { | |
1920 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 1921 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 1922 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 1923 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
1924 | } |
1925 | return status; | |
1926 | } | |
1927 | ||
1928 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1929 | struct inode *new_dir, struct qstr *new_name) | |
1930 | { | |
1931 | struct nfs4_exception exception = { }; | |
1932 | int err; | |
1933 | do { | |
1934 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1935 | _nfs4_proc_rename(old_dir, old_name, | |
1936 | new_dir, new_name), | |
1937 | &exception); | |
1938 | } while (exception.retry); | |
1939 | return err; | |
1940 | } | |
1941 | ||
1942 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1943 | { | |
91ba2eee | 1944 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1945 | struct nfs4_link_arg arg = { |
1946 | .fh = NFS_FH(inode), | |
1947 | .dir_fh = NFS_FH(dir), | |
1948 | .name = name, | |
91ba2eee TM |
1949 | .bitmask = server->attr_bitmask, |
1950 | }; | |
1951 | struct nfs_fattr fattr, dir_attr; | |
1952 | struct nfs4_link_res res = { | |
1953 | .server = server, | |
1954 | .fattr = &fattr, | |
1955 | .dir_attr = &dir_attr, | |
1da177e4 | 1956 | }; |
1da177e4 LT |
1957 | struct rpc_message msg = { |
1958 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1959 | .rpc_argp = &arg, | |
91ba2eee | 1960 | .rpc_resp = &res, |
1da177e4 LT |
1961 | }; |
1962 | int status; | |
1963 | ||
91ba2eee TM |
1964 | nfs_fattr_init(res.fattr); |
1965 | nfs_fattr_init(res.dir_attr); | |
1966 | status = rpc_call_sync(server->client, &msg, 0); | |
1967 | if (!status) { | |
1968 | update_changeattr(dir, &res.cinfo); | |
1969 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1970 | nfs_refresh_inode(inode, res.fattr); | |
1971 | } | |
1da177e4 LT |
1972 | |
1973 | return status; | |
1974 | } | |
1975 | ||
1976 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1977 | { | |
1978 | struct nfs4_exception exception = { }; | |
1979 | int err; | |
1980 | do { | |
1981 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1982 | _nfs4_proc_link(inode, dir, name), | |
1983 | &exception); | |
1984 | } while (exception.retry); | |
1985 | return err; | |
1986 | } | |
1987 | ||
1988 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
1989 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
1990 | struct nfs_fattr *fattr) | |
1991 | { | |
1992 | struct nfs_server *server = NFS_SERVER(dir); | |
56ae19f3 | 1993 | struct nfs_fattr dir_fattr; |
1da177e4 LT |
1994 | struct nfs4_create_arg arg = { |
1995 | .dir_fh = NFS_FH(dir), | |
1996 | .server = server, | |
1997 | .name = name, | |
1998 | .attrs = sattr, | |
1999 | .ftype = NF4LNK, | |
2000 | .bitmask = server->attr_bitmask, | |
2001 | }; | |
2002 | struct nfs4_create_res res = { | |
2003 | .server = server, | |
2004 | .fh = fhandle, | |
2005 | .fattr = fattr, | |
56ae19f3 | 2006 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2007 | }; |
2008 | struct rpc_message msg = { | |
2009 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
2010 | .rpc_argp = &arg, | |
2011 | .rpc_resp = &res, | |
2012 | }; | |
2013 | int status; | |
2014 | ||
2015 | if (path->len > NFS4_MAXPATHLEN) | |
2016 | return -ENAMETOOLONG; | |
2017 | arg.u.symlink = path; | |
0e574af1 | 2018 | nfs_fattr_init(fattr); |
56ae19f3 | 2019 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2020 | |
2021 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2022 | if (!status) | |
2023 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2024 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2025 | return status; |
2026 | } | |
2027 | ||
2028 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
2029 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
2030 | struct nfs_fattr *fattr) | |
2031 | { | |
2032 | struct nfs4_exception exception = { }; | |
2033 | int err; | |
2034 | do { | |
2035 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2036 | _nfs4_proc_symlink(dir, name, path, sattr, | |
2037 | fhandle, fattr), | |
2038 | &exception); | |
2039 | } while (exception.retry); | |
2040 | return err; | |
2041 | } | |
2042 | ||
2043 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2044 | struct iattr *sattr) | |
2045 | { | |
2046 | struct nfs_server *server = NFS_SERVER(dir); | |
2047 | struct nfs_fh fhandle; | |
56ae19f3 | 2048 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2049 | struct nfs4_create_arg arg = { |
2050 | .dir_fh = NFS_FH(dir), | |
2051 | .server = server, | |
2052 | .name = &dentry->d_name, | |
2053 | .attrs = sattr, | |
2054 | .ftype = NF4DIR, | |
2055 | .bitmask = server->attr_bitmask, | |
2056 | }; | |
2057 | struct nfs4_create_res res = { | |
2058 | .server = server, | |
2059 | .fh = &fhandle, | |
2060 | .fattr = &fattr, | |
56ae19f3 | 2061 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2062 | }; |
2063 | struct rpc_message msg = { | |
2064 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2065 | .rpc_argp = &arg, | |
2066 | .rpc_resp = &res, | |
2067 | }; | |
2068 | int status; | |
2069 | ||
0e574af1 | 2070 | nfs_fattr_init(&fattr); |
56ae19f3 | 2071 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2072 | |
2073 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2074 | if (!status) { | |
2075 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2076 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2077 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
2078 | } | |
2079 | return status; | |
2080 | } | |
2081 | ||
2082 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2083 | struct iattr *sattr) | |
2084 | { | |
2085 | struct nfs4_exception exception = { }; | |
2086 | int err; | |
2087 | do { | |
2088 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2089 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2090 | &exception); | |
2091 | } while (exception.retry); | |
2092 | return err; | |
2093 | } | |
2094 | ||
2095 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2096 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2097 | { | |
2098 | struct inode *dir = dentry->d_inode; | |
2099 | struct nfs4_readdir_arg args = { | |
2100 | .fh = NFS_FH(dir), | |
2101 | .pages = &page, | |
2102 | .pgbase = 0, | |
2103 | .count = count, | |
2104 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2105 | }; | |
2106 | struct nfs4_readdir_res res; | |
2107 | struct rpc_message msg = { | |
2108 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2109 | .rpc_argp = &args, | |
2110 | .rpc_resp = &res, | |
2111 | .rpc_cred = cred, | |
2112 | }; | |
2113 | int status; | |
2114 | ||
eadf4598 TM |
2115 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
2116 | dentry->d_parent->d_name.name, | |
2117 | dentry->d_name.name, | |
2118 | (unsigned long long)cookie); | |
1da177e4 LT |
2119 | lock_kernel(); |
2120 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
2121 | res.pgbase = args.pgbase; | |
2122 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2123 | if (status == 0) | |
2124 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
2125 | unlock_kernel(); | |
eadf4598 | 2126 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
2127 | return status; |
2128 | } | |
2129 | ||
2130 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2131 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2132 | { | |
2133 | struct nfs4_exception exception = { }; | |
2134 | int err; | |
2135 | do { | |
2136 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2137 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2138 | page, count, plus), | |
2139 | &exception); | |
2140 | } while (exception.retry); | |
2141 | return err; | |
2142 | } | |
2143 | ||
2144 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2145 | struct iattr *sattr, dev_t rdev) | |
2146 | { | |
2147 | struct nfs_server *server = NFS_SERVER(dir); | |
2148 | struct nfs_fh fh; | |
56ae19f3 | 2149 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2150 | struct nfs4_create_arg arg = { |
2151 | .dir_fh = NFS_FH(dir), | |
2152 | .server = server, | |
2153 | .name = &dentry->d_name, | |
2154 | .attrs = sattr, | |
2155 | .bitmask = server->attr_bitmask, | |
2156 | }; | |
2157 | struct nfs4_create_res res = { | |
2158 | .server = server, | |
2159 | .fh = &fh, | |
2160 | .fattr = &fattr, | |
56ae19f3 | 2161 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2162 | }; |
2163 | struct rpc_message msg = { | |
2164 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2165 | .rpc_argp = &arg, | |
2166 | .rpc_resp = &res, | |
2167 | }; | |
2168 | int status; | |
2169 | int mode = sattr->ia_mode; | |
2170 | ||
0e574af1 | 2171 | nfs_fattr_init(&fattr); |
56ae19f3 | 2172 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2173 | |
2174 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2175 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2176 | if (S_ISFIFO(mode)) | |
2177 | arg.ftype = NF4FIFO; | |
2178 | else if (S_ISBLK(mode)) { | |
2179 | arg.ftype = NF4BLK; | |
2180 | arg.u.device.specdata1 = MAJOR(rdev); | |
2181 | arg.u.device.specdata2 = MINOR(rdev); | |
2182 | } | |
2183 | else if (S_ISCHR(mode)) { | |
2184 | arg.ftype = NF4CHR; | |
2185 | arg.u.device.specdata1 = MAJOR(rdev); | |
2186 | arg.u.device.specdata2 = MINOR(rdev); | |
2187 | } | |
2188 | else | |
2189 | arg.ftype = NF4SOCK; | |
2190 | ||
2191 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2192 | if (status == 0) { | |
2193 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2194 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2195 | status = nfs_instantiate(dentry, &fh, &fattr); |
2196 | } | |
2197 | return status; | |
2198 | } | |
2199 | ||
2200 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2201 | struct iattr *sattr, dev_t rdev) | |
2202 | { | |
2203 | struct nfs4_exception exception = { }; | |
2204 | int err; | |
2205 | do { | |
2206 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2207 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2208 | &exception); | |
2209 | } while (exception.retry); | |
2210 | return err; | |
2211 | } | |
2212 | ||
2213 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2214 | struct nfs_fsstat *fsstat) | |
2215 | { | |
2216 | struct nfs4_statfs_arg args = { | |
2217 | .fh = fhandle, | |
2218 | .bitmask = server->attr_bitmask, | |
2219 | }; | |
2220 | struct rpc_message msg = { | |
2221 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2222 | .rpc_argp = &args, | |
2223 | .rpc_resp = fsstat, | |
2224 | }; | |
2225 | ||
0e574af1 | 2226 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2227 | return rpc_call_sync(server->client, &msg, 0); |
2228 | } | |
2229 | ||
2230 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2231 | { | |
2232 | struct nfs4_exception exception = { }; | |
2233 | int err; | |
2234 | do { | |
2235 | err = nfs4_handle_exception(server, | |
2236 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2237 | &exception); | |
2238 | } while (exception.retry); | |
2239 | return err; | |
2240 | } | |
2241 | ||
2242 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2243 | struct nfs_fsinfo *fsinfo) | |
2244 | { | |
2245 | struct nfs4_fsinfo_arg args = { | |
2246 | .fh = fhandle, | |
2247 | .bitmask = server->attr_bitmask, | |
2248 | }; | |
2249 | struct rpc_message msg = { | |
2250 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2251 | .rpc_argp = &args, | |
2252 | .rpc_resp = fsinfo, | |
2253 | }; | |
2254 | ||
2255 | return rpc_call_sync(server->client, &msg, 0); | |
2256 | } | |
2257 | ||
2258 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2259 | { | |
2260 | struct nfs4_exception exception = { }; | |
2261 | int err; | |
2262 | ||
2263 | do { | |
2264 | err = nfs4_handle_exception(server, | |
2265 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2266 | &exception); | |
2267 | } while (exception.retry); | |
2268 | return err; | |
2269 | } | |
2270 | ||
2271 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2272 | { | |
0e574af1 | 2273 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2274 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2275 | } | |
2276 | ||
2277 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2278 | struct nfs_pathconf *pathconf) | |
2279 | { | |
2280 | struct nfs4_pathconf_arg args = { | |
2281 | .fh = fhandle, | |
2282 | .bitmask = server->attr_bitmask, | |
2283 | }; | |
2284 | struct rpc_message msg = { | |
2285 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2286 | .rpc_argp = &args, | |
2287 | .rpc_resp = pathconf, | |
2288 | }; | |
2289 | ||
2290 | /* None of the pathconf attributes are mandatory to implement */ | |
2291 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2292 | memset(pathconf, 0, sizeof(*pathconf)); | |
2293 | return 0; | |
2294 | } | |
2295 | ||
0e574af1 | 2296 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2297 | return rpc_call_sync(server->client, &msg, 0); |
2298 | } | |
2299 | ||
2300 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2301 | struct nfs_pathconf *pathconf) | |
2302 | { | |
2303 | struct nfs4_exception exception = { }; | |
2304 | int err; | |
2305 | ||
2306 | do { | |
2307 | err = nfs4_handle_exception(server, | |
2308 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2309 | &exception); | |
2310 | } while (exception.retry); | |
2311 | return err; | |
2312 | } | |
2313 | ||
963d8fe5 | 2314 | static void nfs4_read_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2315 | { |
963d8fe5 | 2316 | struct nfs_read_data *data = calldata; |
1da177e4 LT |
2317 | struct inode *inode = data->inode; |
2318 | ||
2319 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2320 | rpc_restart_call(task); | |
2321 | return; | |
2322 | } | |
2323 | if (task->tk_status > 0) | |
2324 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2325 | /* Call back common NFS readpage processing */ | |
963d8fe5 | 2326 | nfs_readpage_result(task, calldata); |
1da177e4 LT |
2327 | } |
2328 | ||
963d8fe5 TM |
2329 | static const struct rpc_call_ops nfs4_read_ops = { |
2330 | .rpc_call_done = nfs4_read_done, | |
2331 | .rpc_release = nfs_readdata_release, | |
2332 | }; | |
2333 | ||
1da177e4 LT |
2334 | static void |
2335 | nfs4_proc_read_setup(struct nfs_read_data *data) | |
2336 | { | |
2337 | struct rpc_task *task = &data->task; | |
2338 | struct rpc_message msg = { | |
2339 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2340 | .rpc_argp = &data->args, | |
2341 | .rpc_resp = &data->res, | |
2342 | .rpc_cred = data->cred, | |
2343 | }; | |
2344 | struct inode *inode = data->inode; | |
2345 | int flags; | |
2346 | ||
2347 | data->timestamp = jiffies; | |
2348 | ||
2349 | /* N.B. Do we need to test? Never called for swapfile inode */ | |
2350 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); | |
2351 | ||
2352 | /* Finalize the task. */ | |
963d8fe5 | 2353 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data); |
1da177e4 LT |
2354 | rpc_call_setup(task, &msg, 0); |
2355 | } | |
2356 | ||
963d8fe5 | 2357 | static void nfs4_write_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2358 | { |
963d8fe5 | 2359 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2360 | struct inode *inode = data->inode; |
2361 | ||
2362 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2363 | rpc_restart_call(task); | |
2364 | return; | |
2365 | } | |
4f9838c7 | 2366 | if (task->tk_status >= 0) { |
1da177e4 | 2367 | renew_lease(NFS_SERVER(inode), data->timestamp); |
4f9838c7 TM |
2368 | nfs_post_op_update_inode(inode, data->res.fattr); |
2369 | } | |
1da177e4 | 2370 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2371 | nfs_writeback_done(task, calldata); |
1da177e4 LT |
2372 | } |
2373 | ||
963d8fe5 TM |
2374 | static const struct rpc_call_ops nfs4_write_ops = { |
2375 | .rpc_call_done = nfs4_write_done, | |
2376 | .rpc_release = nfs_writedata_release, | |
2377 | }; | |
2378 | ||
1da177e4 LT |
2379 | static void |
2380 | nfs4_proc_write_setup(struct nfs_write_data *data, int how) | |
2381 | { | |
2382 | struct rpc_task *task = &data->task; | |
2383 | struct rpc_message msg = { | |
2384 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2385 | .rpc_argp = &data->args, | |
2386 | .rpc_resp = &data->res, | |
2387 | .rpc_cred = data->cred, | |
2388 | }; | |
2389 | struct inode *inode = data->inode; | |
4f9838c7 | 2390 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2391 | int stable; |
2392 | int flags; | |
2393 | ||
2394 | if (how & FLUSH_STABLE) { | |
2395 | if (!NFS_I(inode)->ncommit) | |
2396 | stable = NFS_FILE_SYNC; | |
2397 | else | |
2398 | stable = NFS_DATA_SYNC; | |
2399 | } else | |
2400 | stable = NFS_UNSTABLE; | |
2401 | data->args.stable = stable; | |
4f9838c7 TM |
2402 | data->args.bitmask = server->attr_bitmask; |
2403 | data->res.server = server; | |
1da177e4 LT |
2404 | |
2405 | data->timestamp = jiffies; | |
2406 | ||
2407 | /* Set the initial flags for the task. */ | |
2408 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2409 | ||
2410 | /* Finalize the task. */ | |
963d8fe5 | 2411 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data); |
1da177e4 LT |
2412 | rpc_call_setup(task, &msg, 0); |
2413 | } | |
2414 | ||
963d8fe5 | 2415 | static void nfs4_commit_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2416 | { |
963d8fe5 | 2417 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2418 | struct inode *inode = data->inode; |
2419 | ||
2420 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2421 | rpc_restart_call(task); | |
2422 | return; | |
2423 | } | |
4f9838c7 TM |
2424 | if (task->tk_status >= 0) |
2425 | nfs_post_op_update_inode(inode, data->res.fattr); | |
1da177e4 | 2426 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2427 | nfs_commit_done(task, calldata); |
1da177e4 LT |
2428 | } |
2429 | ||
963d8fe5 TM |
2430 | static const struct rpc_call_ops nfs4_commit_ops = { |
2431 | .rpc_call_done = nfs4_commit_done, | |
2432 | .rpc_release = nfs_commit_release, | |
2433 | }; | |
2434 | ||
1da177e4 LT |
2435 | static void |
2436 | nfs4_proc_commit_setup(struct nfs_write_data *data, int how) | |
2437 | { | |
2438 | struct rpc_task *task = &data->task; | |
2439 | struct rpc_message msg = { | |
2440 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2441 | .rpc_argp = &data->args, | |
2442 | .rpc_resp = &data->res, | |
2443 | .rpc_cred = data->cred, | |
2444 | }; | |
2445 | struct inode *inode = data->inode; | |
4f9838c7 | 2446 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2447 | int flags; |
2448 | ||
4f9838c7 TM |
2449 | data->args.bitmask = server->attr_bitmask; |
2450 | data->res.server = server; | |
2451 | ||
1da177e4 LT |
2452 | /* Set the initial flags for the task. */ |
2453 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2454 | ||
2455 | /* Finalize the task. */ | |
963d8fe5 | 2456 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data); |
1da177e4 LT |
2457 | rpc_call_setup(task, &msg, 0); |
2458 | } | |
2459 | ||
2460 | /* | |
2461 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2462 | * standalone procedure for queueing an asynchronous RENEW. | |
2463 | */ | |
963d8fe5 | 2464 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 LT |
2465 | { |
2466 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; | |
963d8fe5 | 2467 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2468 | |
2469 | if (task->tk_status < 0) { | |
2470 | switch (task->tk_status) { | |
2471 | case -NFS4ERR_STALE_CLIENTID: | |
2472 | case -NFS4ERR_EXPIRED: | |
2473 | case -NFS4ERR_CB_PATH_DOWN: | |
2474 | nfs4_schedule_state_recovery(clp); | |
2475 | } | |
2476 | return; | |
2477 | } | |
2478 | spin_lock(&clp->cl_lock); | |
2479 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2480 | clp->cl_last_renewal = timestamp; | |
2481 | spin_unlock(&clp->cl_lock); | |
2482 | } | |
2483 | ||
963d8fe5 TM |
2484 | static const struct rpc_call_ops nfs4_renew_ops = { |
2485 | .rpc_call_done = nfs4_renew_done, | |
2486 | }; | |
2487 | ||
1da177e4 LT |
2488 | int |
2489 | nfs4_proc_async_renew(struct nfs4_client *clp) | |
2490 | { | |
2491 | struct rpc_message msg = { | |
2492 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2493 | .rpc_argp = clp, | |
2494 | .rpc_cred = clp->cl_cred, | |
2495 | }; | |
2496 | ||
2497 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2498 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2499 | } |
2500 | ||
2501 | int | |
2502 | nfs4_proc_renew(struct nfs4_client *clp) | |
2503 | { | |
2504 | struct rpc_message msg = { | |
2505 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2506 | .rpc_argp = clp, | |
2507 | .rpc_cred = clp->cl_cred, | |
2508 | }; | |
2509 | unsigned long now = jiffies; | |
2510 | int status; | |
2511 | ||
2512 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2513 | if (status < 0) | |
2514 | return status; | |
2515 | spin_lock(&clp->cl_lock); | |
2516 | if (time_before(clp->cl_last_renewal,now)) | |
2517 | clp->cl_last_renewal = now; | |
2518 | spin_unlock(&clp->cl_lock); | |
2519 | return 0; | |
2520 | } | |
2521 | ||
aa1870af BF |
2522 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2523 | { | |
2524 | return (server->caps & NFS_CAP_ACLS) | |
2525 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2526 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2527 | } | |
2528 | ||
2529 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2530 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2531 | * the stack. | |
2532 | */ | |
2533 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2534 | ||
2535 | static void buf_to_pages(const void *buf, size_t buflen, | |
2536 | struct page **pages, unsigned int *pgbase) | |
2537 | { | |
2538 | const void *p = buf; | |
2539 | ||
2540 | *pgbase = offset_in_page(buf); | |
2541 | p -= *pgbase; | |
2542 | while (p < buf + buflen) { | |
2543 | *(pages++) = virt_to_page(p); | |
2544 | p += PAGE_CACHE_SIZE; | |
2545 | } | |
2546 | } | |
2547 | ||
e50a1c2e BF |
2548 | struct nfs4_cached_acl { |
2549 | int cached; | |
2550 | size_t len; | |
3e9d4154 | 2551 | char data[0]; |
e50a1c2e BF |
2552 | }; |
2553 | ||
2554 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2555 | { | |
2556 | struct nfs_inode *nfsi = NFS_I(inode); | |
2557 | ||
2558 | spin_lock(&inode->i_lock); | |
2559 | kfree(nfsi->nfs4_acl); | |
2560 | nfsi->nfs4_acl = acl; | |
2561 | spin_unlock(&inode->i_lock); | |
2562 | } | |
2563 | ||
2564 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2565 | { | |
2566 | nfs4_set_cached_acl(inode, NULL); | |
2567 | } | |
2568 | ||
2569 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2570 | { | |
2571 | struct nfs_inode *nfsi = NFS_I(inode); | |
2572 | struct nfs4_cached_acl *acl; | |
2573 | int ret = -ENOENT; | |
2574 | ||
2575 | spin_lock(&inode->i_lock); | |
2576 | acl = nfsi->nfs4_acl; | |
2577 | if (acl == NULL) | |
2578 | goto out; | |
2579 | if (buf == NULL) /* user is just asking for length */ | |
2580 | goto out_len; | |
2581 | if (acl->cached == 0) | |
2582 | goto out; | |
2583 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2584 | if (acl->len > buflen) | |
2585 | goto out; | |
2586 | memcpy(buf, acl->data, acl->len); | |
2587 | out_len: | |
2588 | ret = acl->len; | |
2589 | out: | |
2590 | spin_unlock(&inode->i_lock); | |
2591 | return ret; | |
2592 | } | |
2593 | ||
2594 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2595 | { | |
2596 | struct nfs4_cached_acl *acl; | |
2597 | ||
2598 | if (buf && acl_len <= PAGE_SIZE) { | |
2599 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2600 | if (acl == NULL) | |
2601 | goto out; | |
2602 | acl->cached = 1; | |
2603 | memcpy(acl->data, buf, acl_len); | |
2604 | } else { | |
2605 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2606 | if (acl == NULL) | |
2607 | goto out; | |
2608 | acl->cached = 0; | |
2609 | } | |
2610 | acl->len = acl_len; | |
2611 | out: | |
2612 | nfs4_set_cached_acl(inode, acl); | |
2613 | } | |
2614 | ||
2615 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
aa1870af | 2616 | { |
aa1870af BF |
2617 | struct page *pages[NFS4ACL_MAXPAGES]; |
2618 | struct nfs_getaclargs args = { | |
2619 | .fh = NFS_FH(inode), | |
2620 | .acl_pages = pages, | |
2621 | .acl_len = buflen, | |
2622 | }; | |
2623 | size_t resp_len = buflen; | |
e50a1c2e | 2624 | void *resp_buf; |
aa1870af BF |
2625 | struct rpc_message msg = { |
2626 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2627 | .rpc_argp = &args, | |
2628 | .rpc_resp = &resp_len, | |
2629 | }; | |
e50a1c2e | 2630 | struct page *localpage = NULL; |
aa1870af BF |
2631 | int ret; |
2632 | ||
e50a1c2e BF |
2633 | if (buflen < PAGE_SIZE) { |
2634 | /* As long as we're doing a round trip to the server anyway, | |
2635 | * let's be prepared for a page of acl data. */ | |
2636 | localpage = alloc_page(GFP_KERNEL); | |
2637 | resp_buf = page_address(localpage); | |
2638 | if (localpage == NULL) | |
2639 | return -ENOMEM; | |
2640 | args.acl_pages[0] = localpage; | |
2641 | args.acl_pgbase = 0; | |
1d95db8e | 2642 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2643 | } else { |
2644 | resp_buf = buf; | |
2645 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2646 | } | |
aa1870af | 2647 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2648 | if (ret) |
2649 | goto out_free; | |
2650 | if (resp_len > args.acl_len) | |
2651 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2652 | else | |
2653 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2654 | if (buf) { | |
2655 | ret = -ERANGE; | |
2656 | if (resp_len > buflen) | |
2657 | goto out_free; | |
2658 | if (localpage) | |
2659 | memcpy(buf, resp_buf, resp_len); | |
2660 | } | |
2661 | ret = resp_len; | |
2662 | out_free: | |
2663 | if (localpage) | |
2664 | __free_page(localpage); | |
aa1870af BF |
2665 | return ret; |
2666 | } | |
2667 | ||
e50a1c2e BF |
2668 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2669 | { | |
2670 | struct nfs_server *server = NFS_SERVER(inode); | |
2671 | int ret; | |
2672 | ||
2673 | if (!nfs4_server_supports_acls(server)) | |
2674 | return -EOPNOTSUPP; | |
2675 | ret = nfs_revalidate_inode(server, inode); | |
2676 | if (ret < 0) | |
2677 | return ret; | |
2678 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2679 | if (ret != -ENOENT) | |
2680 | return ret; | |
2681 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2682 | } | |
2683 | ||
4b580ee3 BF |
2684 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2685 | { | |
2686 | struct nfs_server *server = NFS_SERVER(inode); | |
2687 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2688 | struct nfs_setaclargs arg = { | |
2689 | .fh = NFS_FH(inode), | |
2690 | .acl_pages = pages, | |
2691 | .acl_len = buflen, | |
2692 | }; | |
2693 | struct rpc_message msg = { | |
2694 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2695 | .rpc_argp = &arg, | |
2696 | .rpc_resp = NULL, | |
2697 | }; | |
2698 | int ret; | |
2699 | ||
2700 | if (!nfs4_server_supports_acls(server)) | |
2701 | return -EOPNOTSUPP; | |
642ac549 | 2702 | nfs_inode_return_delegation(inode); |
4b580ee3 BF |
2703 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
2704 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); | |
e50a1c2e BF |
2705 | if (ret == 0) |
2706 | nfs4_write_cached_acl(inode, buf, buflen); | |
4b580ee3 BF |
2707 | return ret; |
2708 | } | |
2709 | ||
1da177e4 | 2710 | static int |
faf5f49c | 2711 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 LT |
2712 | { |
2713 | struct nfs4_client *clp = server->nfs4_state; | |
2714 | ||
2715 | if (!clp || task->tk_status >= 0) | |
2716 | return 0; | |
2717 | switch(task->tk_status) { | |
2718 | case -NFS4ERR_STALE_CLIENTID: | |
2719 | case -NFS4ERR_STALE_STATEID: | |
2720 | case -NFS4ERR_EXPIRED: | |
2721 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2722 | nfs4_schedule_state_recovery(clp); | |
2723 | if (test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2724 | rpc_wake_up_task(task); | |
2725 | task->tk_status = 0; | |
2726 | return -EAGAIN; | |
2727 | case -NFS4ERR_GRACE: | |
2728 | case -NFS4ERR_DELAY: | |
2729 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
2730 | task->tk_status = 0; | |
2731 | return -EAGAIN; | |
2732 | case -NFS4ERR_OLD_STATEID: | |
2733 | task->tk_status = 0; | |
2734 | return -EAGAIN; | |
2735 | } | |
2736 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2737 | return 0; | |
2738 | } | |
2739 | ||
2740 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) | |
2741 | { | |
2742 | DEFINE_WAIT(wait); | |
2743 | sigset_t oldset; | |
2744 | int interruptible, res = 0; | |
2745 | ||
2746 | might_sleep(); | |
2747 | ||
2748 | rpc_clnt_sigmask(clnt, &oldset); | |
2749 | interruptible = TASK_UNINTERRUPTIBLE; | |
2750 | if (clnt->cl_intr) | |
2751 | interruptible = TASK_INTERRUPTIBLE; | |
2752 | prepare_to_wait(&clp->cl_waitq, &wait, interruptible); | |
2753 | nfs4_schedule_state_recovery(clp); | |
2754 | if (clnt->cl_intr && signalled()) | |
2755 | res = -ERESTARTSYS; | |
2756 | else if (!test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2757 | schedule(); | |
2758 | finish_wait(&clp->cl_waitq, &wait); | |
2759 | rpc_clnt_sigunmask(clnt, &oldset); | |
2760 | return res; | |
2761 | } | |
2762 | ||
2763 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2764 | { | |
2765 | sigset_t oldset; | |
2766 | int res = 0; | |
2767 | ||
2768 | might_sleep(); | |
2769 | ||
2770 | if (*timeout <= 0) | |
2771 | *timeout = NFS4_POLL_RETRY_MIN; | |
2772 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2773 | *timeout = NFS4_POLL_RETRY_MAX; | |
2774 | rpc_clnt_sigmask(clnt, &oldset); | |
2775 | if (clnt->cl_intr) { | |
041e0e3b | 2776 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2777 | if (signalled()) |
2778 | res = -ERESTARTSYS; | |
041e0e3b NA |
2779 | } else |
2780 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2781 | rpc_clnt_sigunmask(clnt, &oldset); |
2782 | *timeout <<= 1; | |
2783 | return res; | |
2784 | } | |
2785 | ||
2786 | /* This is the error handling routine for processes that are allowed | |
2787 | * to sleep. | |
2788 | */ | |
faf5f49c | 2789 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 LT |
2790 | { |
2791 | struct nfs4_client *clp = server->nfs4_state; | |
2792 | int ret = errorcode; | |
2793 | ||
2794 | exception->retry = 0; | |
2795 | switch(errorcode) { | |
2796 | case 0: | |
2797 | return 0; | |
2798 | case -NFS4ERR_STALE_CLIENTID: | |
2799 | case -NFS4ERR_STALE_STATEID: | |
2800 | case -NFS4ERR_EXPIRED: | |
2801 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
2802 | if (ret == 0) | |
2803 | exception->retry = 1; | |
2804 | break; | |
2805 | case -NFS4ERR_GRACE: | |
2806 | case -NFS4ERR_DELAY: | |
2807 | ret = nfs4_delay(server->client, &exception->timeout); | |
2c56617d TM |
2808 | if (ret != 0) |
2809 | break; | |
1da177e4 | 2810 | case -NFS4ERR_OLD_STATEID: |
2c56617d | 2811 | exception->retry = 1; |
1da177e4 LT |
2812 | } |
2813 | /* We failed to handle the error */ | |
2814 | return nfs4_map_errors(ret); | |
2815 | } | |
2816 | ||
2817 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) | |
2818 | { | |
2819 | nfs4_verifier sc_verifier; | |
2820 | struct nfs4_setclientid setclientid = { | |
2821 | .sc_verifier = &sc_verifier, | |
2822 | .sc_prog = program, | |
2823 | }; | |
2824 | struct rpc_message msg = { | |
2825 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2826 | .rpc_argp = &setclientid, | |
2827 | .rpc_resp = clp, | |
2828 | .rpc_cred = clp->cl_cred, | |
2829 | }; | |
2830 | u32 *p; | |
2831 | int loop = 0; | |
2832 | int status; | |
2833 | ||
2834 | p = (u32*)sc_verifier.data; | |
2835 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
2836 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2837 | ||
2838 | for(;;) { | |
2839 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2840 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
2841 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), | |
2842 | clp->cl_cred->cr_ops->cr_name, | |
2843 | clp->cl_id_uniquifier); | |
2844 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2845 | sizeof(setclientid.sc_netid), "tcp"); | |
2846 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2847 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2848 | clp->cl_ipaddr, port >> 8, port & 255); | |
2849 | ||
2850 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2851 | if (status != -NFS4ERR_CLID_INUSE) | |
2852 | break; | |
2853 | if (signalled()) | |
2854 | break; | |
2855 | if (loop++ & 1) | |
2856 | ssleep(clp->cl_lease_time + 1); | |
2857 | else | |
2858 | if (++clp->cl_id_uniquifier == 0) | |
2859 | break; | |
2860 | } | |
2861 | return status; | |
2862 | } | |
2863 | ||
2864 | int | |
2865 | nfs4_proc_setclientid_confirm(struct nfs4_client *clp) | |
2866 | { | |
2867 | struct nfs_fsinfo fsinfo; | |
2868 | struct rpc_message msg = { | |
2869 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2870 | .rpc_argp = clp, | |
2871 | .rpc_resp = &fsinfo, | |
2872 | .rpc_cred = clp->cl_cred, | |
2873 | }; | |
2874 | unsigned long now; | |
2875 | int status; | |
2876 | ||
2877 | now = jiffies; | |
2878 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2879 | if (status == 0) { | |
2880 | spin_lock(&clp->cl_lock); | |
2881 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2882 | clp->cl_last_renewal = now; | |
2883 | spin_unlock(&clp->cl_lock); | |
2884 | } | |
2885 | return status; | |
2886 | } | |
2887 | ||
fe650407 TM |
2888 | struct nfs4_delegreturndata { |
2889 | struct nfs4_delegreturnargs args; | |
2890 | struct nfs_fh fh; | |
2891 | nfs4_stateid stateid; | |
2892 | struct rpc_cred *cred; | |
2893 | int rpc_status; | |
2894 | }; | |
2895 | ||
2896 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) | |
1da177e4 | 2897 | { |
fe650407 | 2898 | struct nfs4_delegreturndata *data = calldata; |
1da177e4 LT |
2899 | struct rpc_message msg = { |
2900 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
fe650407 TM |
2901 | .rpc_argp = &data->args, |
2902 | .rpc_cred = data->cred, | |
1da177e4 | 2903 | }; |
fe650407 TM |
2904 | rpc_call_setup(task, &msg, 0); |
2905 | } | |
1da177e4 | 2906 | |
fe650407 TM |
2907 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
2908 | { | |
2909 | struct nfs4_delegreturndata *data = calldata; | |
2910 | data->rpc_status = task->tk_status; | |
2911 | } | |
2912 | ||
2913 | static void nfs4_delegreturn_release(void *calldata) | |
2914 | { | |
2915 | struct nfs4_delegreturndata *data = calldata; | |
2916 | ||
2917 | put_rpccred(data->cred); | |
2918 | kfree(calldata); | |
2919 | } | |
2920 | ||
2921 | const static struct rpc_call_ops nfs4_delegreturn_ops = { | |
2922 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
2923 | .rpc_call_done = nfs4_delegreturn_done, | |
2924 | .rpc_release = nfs4_delegreturn_release, | |
2925 | }; | |
2926 | ||
2927 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2928 | { | |
2929 | struct nfs4_delegreturndata *data; | |
2930 | struct rpc_task *task; | |
2931 | int status; | |
2932 | ||
2933 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
2934 | if (data == NULL) | |
2935 | return -ENOMEM; | |
2936 | data->args.fhandle = &data->fh; | |
2937 | data->args.stateid = &data->stateid; | |
2938 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
2939 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
2940 | data->cred = get_rpccred(cred); | |
2941 | data->rpc_status = 0; | |
2942 | ||
2943 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); | |
2944 | if (IS_ERR(task)) { | |
2945 | nfs4_delegreturn_release(data); | |
2946 | return PTR_ERR(task); | |
2947 | } | |
2948 | status = nfs4_wait_for_completion_rpc_task(task); | |
2949 | if (status == 0) | |
2950 | status = data->rpc_status; | |
2951 | rpc_release_task(task); | |
2952 | return status; | |
1da177e4 LT |
2953 | } |
2954 | ||
2955 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2956 | { | |
2957 | struct nfs_server *server = NFS_SERVER(inode); | |
2958 | struct nfs4_exception exception = { }; | |
2959 | int err; | |
2960 | do { | |
2961 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2962 | switch (err) { | |
2963 | case -NFS4ERR_STALE_STATEID: | |
2964 | case -NFS4ERR_EXPIRED: | |
2965 | nfs4_schedule_state_recovery(server->nfs4_state); | |
2966 | case 0: | |
2967 | return 0; | |
2968 | } | |
2969 | err = nfs4_handle_exception(server, err, &exception); | |
2970 | } while (exception.retry); | |
2971 | return err; | |
2972 | } | |
2973 | ||
2974 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2975 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2976 | ||
2977 | /* | |
2978 | * sleep, with exponential backoff, and retry the LOCK operation. | |
2979 | */ | |
2980 | static unsigned long | |
2981 | nfs4_set_lock_task_retry(unsigned long timeout) | |
2982 | { | |
041e0e3b | 2983 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
2984 | timeout <<= 1; |
2985 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
2986 | return NFS4_LOCK_MAXTIMEOUT; | |
2987 | return timeout; | |
2988 | } | |
2989 | ||
1da177e4 LT |
2990 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
2991 | { | |
2992 | struct inode *inode = state->inode; | |
2993 | struct nfs_server *server = NFS_SERVER(inode); | |
2994 | struct nfs4_client *clp = server->nfs4_state; | |
911d1aaf | 2995 | struct nfs_lockt_args arg = { |
1da177e4 | 2996 | .fh = NFS_FH(inode), |
911d1aaf | 2997 | .fl = request, |
1da177e4 | 2998 | }; |
911d1aaf TM |
2999 | struct nfs_lockt_res res = { |
3000 | .denied = request, | |
1da177e4 LT |
3001 | }; |
3002 | struct rpc_message msg = { | |
3003 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3004 | .rpc_argp = &arg, | |
3005 | .rpc_resp = &res, | |
3006 | .rpc_cred = state->owner->so_cred, | |
3007 | }; | |
1da177e4 LT |
3008 | struct nfs4_lock_state *lsp; |
3009 | int status; | |
3010 | ||
3011 | down_read(&clp->cl_sem); | |
911d1aaf | 3012 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3013 | status = nfs4_set_lock_state(state, request); |
3014 | if (status != 0) | |
3015 | goto out; | |
3016 | lsp = request->fl_u.nfs4_fl.owner; | |
911d1aaf | 3017 | arg.lock_owner.id = lsp->ls_id; |
1da177e4 | 3018 | status = rpc_call_sync(server->client, &msg, 0); |
911d1aaf TM |
3019 | switch (status) { |
3020 | case 0: | |
3021 | request->fl_type = F_UNLCK; | |
3022 | break; | |
3023 | case -NFS4ERR_DENIED: | |
3024 | status = 0; | |
1da177e4 | 3025 | } |
8d0a8a9d | 3026 | out: |
1da177e4 LT |
3027 | up_read(&clp->cl_sem); |
3028 | return status; | |
3029 | } | |
3030 | ||
3031 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3032 | { | |
3033 | struct nfs4_exception exception = { }; | |
3034 | int err; | |
3035 | ||
3036 | do { | |
3037 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3038 | _nfs4_proc_getlk(state, cmd, request), | |
3039 | &exception); | |
3040 | } while (exception.retry); | |
3041 | return err; | |
3042 | } | |
3043 | ||
3044 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3045 | { | |
3046 | int res = 0; | |
3047 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3048 | case FL_POSIX: | |
3049 | res = posix_lock_file_wait(file, fl); | |
3050 | break; | |
3051 | case FL_FLOCK: | |
3052 | res = flock_lock_file_wait(file, fl); | |
3053 | break; | |
3054 | default: | |
3055 | BUG(); | |
3056 | } | |
3057 | if (res < 0) | |
3058 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", | |
3059 | __FUNCTION__); | |
3060 | return res; | |
3061 | } | |
3062 | ||
faf5f49c | 3063 | struct nfs4_unlockdata { |
911d1aaf TM |
3064 | struct nfs_locku_args arg; |
3065 | struct nfs_locku_res res; | |
faf5f49c TM |
3066 | struct nfs4_lock_state *lsp; |
3067 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3068 | struct file_lock fl; |
3069 | const struct nfs_server *server; | |
faf5f49c TM |
3070 | }; |
3071 | ||
911d1aaf TM |
3072 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3073 | struct nfs_open_context *ctx, | |
3074 | struct nfs4_lock_state *lsp, | |
3075 | struct nfs_seqid *seqid) | |
3076 | { | |
3077 | struct nfs4_unlockdata *p; | |
3078 | struct inode *inode = lsp->ls_state->inode; | |
3079 | ||
3080 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3081 | if (p == NULL) | |
3082 | return NULL; | |
3083 | p->arg.fh = NFS_FH(inode); | |
3084 | p->arg.fl = &p->fl; | |
3085 | p->arg.seqid = seqid; | |
3086 | p->arg.stateid = &lsp->ls_stateid; | |
3087 | p->lsp = lsp; | |
3088 | atomic_inc(&lsp->ls_count); | |
3089 | /* Ensure we don't close file until we're done freeing locks! */ | |
3090 | p->ctx = get_nfs_open_context(ctx); | |
3091 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3092 | p->server = NFS_SERVER(inode); | |
3093 | return p; | |
3094 | } | |
3095 | ||
06f814a3 | 3096 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3097 | { |
963d8fe5 | 3098 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3099 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3100 | nfs4_put_lock_state(calldata->lsp); |
3101 | put_nfs_open_context(calldata->ctx); | |
3102 | kfree(calldata); | |
faf5f49c TM |
3103 | } |
3104 | ||
963d8fe5 | 3105 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3106 | { |
963d8fe5 | 3107 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3108 | |
06f814a3 TM |
3109 | if (RPC_ASSASSINATED(task)) |
3110 | return; | |
911d1aaf | 3111 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); |
faf5f49c TM |
3112 | switch (task->tk_status) { |
3113 | case 0: | |
3114 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3115 | calldata->res.stateid.data, |
faf5f49c TM |
3116 | sizeof(calldata->lsp->ls_stateid.data)); |
3117 | break; | |
3118 | case -NFS4ERR_STALE_STATEID: | |
3119 | case -NFS4ERR_EXPIRED: | |
911d1aaf | 3120 | nfs4_schedule_state_recovery(calldata->server->nfs4_state); |
faf5f49c TM |
3121 | break; |
3122 | default: | |
911d1aaf | 3123 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) { |
faf5f49c | 3124 | rpc_restart_call(task); |
faf5f49c TM |
3125 | } |
3126 | } | |
faf5f49c TM |
3127 | } |
3128 | ||
4ce70ada | 3129 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3130 | { |
4ce70ada | 3131 | struct nfs4_unlockdata *calldata = data; |
1da177e4 LT |
3132 | struct rpc_message msg = { |
3133 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
3134 | .rpc_argp = &calldata->arg, |
3135 | .rpc_resp = &calldata->res, | |
3136 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 3137 | }; |
faf5f49c | 3138 | |
911d1aaf | 3139 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3140 | return; |
3141 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3142 | /* Note: exit _without_ running nfs4_locku_done */ |
3143 | task->tk_action = NULL; | |
faf5f49c TM |
3144 | return; |
3145 | } | |
3146 | rpc_call_setup(task, &msg, 0); | |
3147 | } | |
3148 | ||
963d8fe5 | 3149 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3150 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3151 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3152 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3153 | }; |
3154 | ||
a5d16a4d TM |
3155 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3156 | struct nfs_open_context *ctx, | |
3157 | struct nfs4_lock_state *lsp, | |
3158 | struct nfs_seqid *seqid) | |
3159 | { | |
3160 | struct nfs4_unlockdata *data; | |
3161 | struct rpc_task *task; | |
3162 | ||
3163 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3164 | if (data == NULL) { | |
3165 | nfs_free_seqid(seqid); | |
3166 | return ERR_PTR(-ENOMEM); | |
3167 | } | |
3168 | ||
3169 | /* Unlock _before_ we do the RPC call */ | |
3170 | do_vfs_lock(fl->fl_file, fl); | |
3171 | task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); | |
3172 | if (IS_ERR(task)) | |
3173 | nfs4_locku_release_calldata(data); | |
3174 | return task; | |
3175 | } | |
3176 | ||
faf5f49c TM |
3177 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3178 | { | |
911d1aaf | 3179 | struct nfs_seqid *seqid; |
1da177e4 | 3180 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3181 | struct rpc_task *task; |
3182 | int status = 0; | |
faf5f49c | 3183 | |
6bfc93ef TM |
3184 | /* Is this a delegated lock? */ |
3185 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
911d1aaf TM |
3186 | goto out_unlock; |
3187 | /* Is this open_owner holding any locks on the server? */ | |
3188 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) | |
3189 | goto out_unlock; | |
6bfc93ef | 3190 | |
8d0a8a9d TM |
3191 | status = nfs4_set_lock_state(state, request); |
3192 | if (status != 0) | |
911d1aaf | 3193 | goto out_unlock; |
8d0a8a9d | 3194 | lsp = request->fl_u.nfs4_fl.owner; |
06f814a3 | 3195 | status = -ENOMEM; |
911d1aaf TM |
3196 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3197 | if (seqid == NULL) | |
3198 | goto out_unlock; | |
a5d16a4d TM |
3199 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); |
3200 | status = PTR_ERR(task); | |
3201 | if (IS_ERR(task)) | |
3202 | goto out_unlock; | |
3203 | status = nfs4_wait_for_completion_rpc_task(task); | |
3204 | rpc_release_task(task); | |
911d1aaf | 3205 | return status; |
911d1aaf | 3206 | out_unlock: |
faf5f49c | 3207 | do_vfs_lock(request->fl_file, request); |
1da177e4 LT |
3208 | return status; |
3209 | } | |
3210 | ||
a5d16a4d TM |
3211 | struct nfs4_lockdata { |
3212 | struct nfs_lock_args arg; | |
3213 | struct nfs_lock_res res; | |
3214 | struct nfs4_lock_state *lsp; | |
3215 | struct nfs_open_context *ctx; | |
3216 | struct file_lock fl; | |
3217 | int rpc_status; | |
3218 | int cancelled; | |
3219 | }; | |
3220 | ||
3221 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3222 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3223 | { |
a5d16a4d TM |
3224 | struct nfs4_lockdata *p; |
3225 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3226 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3227 | |
3228 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3229 | if (p == NULL) | |
3230 | return NULL; | |
3231 | ||
3232 | p->arg.fh = NFS_FH(inode); | |
3233 | p->arg.fl = &p->fl; | |
3234 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3235 | if (p->arg.lock_seqid == NULL) | |
3236 | goto out_free; | |
3237 | p->arg.lock_stateid = &lsp->ls_stateid; | |
3238 | p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid; | |
3239 | p->arg.lock_owner.id = lsp->ls_id; | |
3240 | p->lsp = lsp; | |
3241 | atomic_inc(&lsp->ls_count); | |
3242 | p->ctx = get_nfs_open_context(ctx); | |
3243 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3244 | return p; | |
3245 | out_free: | |
3246 | kfree(p); | |
3247 | return NULL; | |
3248 | } | |
3249 | ||
3250 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3251 | { | |
3252 | struct nfs4_lockdata *data = calldata; | |
3253 | struct nfs4_state *state = data->lsp->ls_state; | |
3254 | struct nfs4_state_owner *sp = state->owner; | |
1da177e4 | 3255 | struct rpc_message msg = { |
a5d16a4d TM |
3256 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
3257 | .rpc_argp = &data->arg, | |
3258 | .rpc_resp = &data->res, | |
3259 | .rpc_cred = sp->so_cred, | |
1da177e4 | 3260 | }; |
06735b34 | 3261 | |
a5d16a4d TM |
3262 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3263 | return; | |
3264 | dprintk("%s: begin!\n", __FUNCTION__); | |
3265 | /* Do we need to do an open_to_lock_owner? */ | |
3266 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3267 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); | |
3268 | if (data->arg.open_seqid == NULL) { | |
3269 | data->rpc_status = -ENOMEM; | |
3270 | task->tk_action = NULL; | |
06735b34 | 3271 | goto out; |
8d0a8a9d | 3272 | } |
a5d16a4d TM |
3273 | data->arg.open_stateid = &state->stateid; |
3274 | data->arg.new_lock_owner = 1; | |
3275 | } | |
3276 | rpc_call_setup(task, &msg, 0); | |
06735b34 | 3277 | out: |
a5d16a4d TM |
3278 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); |
3279 | } | |
3280 | ||
3281 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3282 | { | |
3283 | struct nfs4_lockdata *data = calldata; | |
3284 | ||
3285 | dprintk("%s: begin!\n", __FUNCTION__); | |
3286 | ||
3287 | data->rpc_status = task->tk_status; | |
3288 | if (RPC_ASSASSINATED(task)) | |
3289 | goto out; | |
3290 | if (data->arg.new_lock_owner != 0) { | |
3291 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); | |
3292 | if (data->rpc_status == 0) | |
3293 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3294 | else | |
3295 | goto out; | |
3296 | } | |
3297 | if (data->rpc_status == 0) { | |
3298 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3299 | sizeof(data->lsp->ls_stateid.data)); | |
3300 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
3301 | } | |
3302 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); | |
3303 | out: | |
3304 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); | |
3305 | } | |
3306 | ||
3307 | static void nfs4_lock_release(void *calldata) | |
3308 | { | |
3309 | struct nfs4_lockdata *data = calldata; | |
3310 | ||
3311 | dprintk("%s: begin!\n", __FUNCTION__); | |
3312 | if (data->arg.open_seqid != NULL) | |
3313 | nfs_free_seqid(data->arg.open_seqid); | |
3314 | if (data->cancelled != 0) { | |
3315 | struct rpc_task *task; | |
3316 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3317 | data->arg.lock_seqid); | |
3318 | if (!IS_ERR(task)) | |
3319 | rpc_release_task(task); | |
3320 | dprintk("%s: cancelling lock!\n", __FUNCTION__); | |
3321 | } else | |
3322 | nfs_free_seqid(data->arg.lock_seqid); | |
3323 | nfs4_put_lock_state(data->lsp); | |
3324 | put_nfs_open_context(data->ctx); | |
3325 | kfree(data); | |
3326 | dprintk("%s: done!\n", __FUNCTION__); | |
3327 | } | |
3328 | ||
3329 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3330 | .rpc_call_prepare = nfs4_lock_prepare, | |
3331 | .rpc_call_done = nfs4_lock_done, | |
3332 | .rpc_release = nfs4_lock_release, | |
3333 | }; | |
3334 | ||
3335 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3336 | { | |
3337 | struct nfs4_lockdata *data; | |
3338 | struct rpc_task *task; | |
3339 | int ret; | |
3340 | ||
3341 | dprintk("%s: begin!\n", __FUNCTION__); | |
3342 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, | |
3343 | fl->fl_u.nfs4_fl.owner); | |
3344 | if (data == NULL) | |
3345 | return -ENOMEM; | |
3346 | if (IS_SETLKW(cmd)) | |
3347 | data->arg.block = 1; | |
3348 | if (reclaim != 0) | |
3349 | data->arg.reclaim = 1; | |
3350 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, | |
3351 | &nfs4_lock_ops, data); | |
3352 | if (IS_ERR(task)) { | |
3353 | nfs4_lock_release(data); | |
3354 | return PTR_ERR(task); | |
3355 | } | |
3356 | ret = nfs4_wait_for_completion_rpc_task(task); | |
3357 | if (ret == 0) { | |
3358 | ret = data->rpc_status; | |
3359 | if (ret == -NFS4ERR_DENIED) | |
3360 | ret = -EAGAIN; | |
3361 | } else | |
3362 | data->cancelled = 1; | |
3363 | rpc_release_task(task); | |
3364 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); | |
3365 | return ret; | |
1da177e4 LT |
3366 | } |
3367 | ||
3368 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3369 | { | |
202b50dc TM |
3370 | struct nfs_server *server = NFS_SERVER(state->inode); |
3371 | struct nfs4_exception exception = { }; | |
3372 | int err; | |
3373 | ||
6bfc93ef TM |
3374 | /* Cache the lock if possible... */ |
3375 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3376 | return 0; | |
202b50dc TM |
3377 | do { |
3378 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
3379 | if (err != -NFS4ERR_DELAY) | |
3380 | break; | |
3381 | nfs4_handle_exception(server, err, &exception); | |
3382 | } while (exception.retry); | |
3383 | return err; | |
1da177e4 LT |
3384 | } |
3385 | ||
3386 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3387 | { | |
202b50dc TM |
3388 | struct nfs_server *server = NFS_SERVER(state->inode); |
3389 | struct nfs4_exception exception = { }; | |
3390 | int err; | |
3391 | ||
6bfc93ef TM |
3392 | err = nfs4_set_lock_state(state, request); |
3393 | if (err != 0) | |
3394 | return err; | |
202b50dc TM |
3395 | do { |
3396 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
3397 | if (err != -NFS4ERR_DELAY) | |
3398 | break; | |
3399 | nfs4_handle_exception(server, err, &exception); | |
3400 | } while (exception.retry); | |
3401 | return err; | |
1da177e4 LT |
3402 | } |
3403 | ||
3404 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3405 | { | |
3406 | struct nfs4_client *clp = state->owner->so_client; | |
3407 | int status; | |
3408 | ||
6bfc93ef | 3409 | /* Is this a delegated open? */ |
ff604066 | 3410 | if (NFS_I(state->inode)->delegation_state != 0) { |
6bfc93ef TM |
3411 | /* Yes: cache locks! */ |
3412 | status = do_vfs_lock(request->fl_file, request); | |
3413 | /* ...but avoid races with delegation recall... */ | |
3414 | if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
ff604066 | 3415 | return status; |
1da177e4 | 3416 | } |
ff604066 | 3417 | down_read(&clp->cl_sem); |
6bfc93ef TM |
3418 | status = nfs4_set_lock_state(state, request); |
3419 | if (status != 0) | |
3420 | goto out; | |
3421 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
3422 | if (status != 0) | |
3423 | goto out; | |
3424 | /* Note: we always want to sleep here! */ | |
3425 | request->fl_flags |= FL_SLEEP; | |
3426 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3427 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
3428 | out: | |
1da177e4 LT |
3429 | up_read(&clp->cl_sem); |
3430 | return status; | |
3431 | } | |
3432 | ||
3433 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3434 | { | |
3435 | struct nfs4_exception exception = { }; | |
3436 | int err; | |
3437 | ||
3438 | do { | |
3439 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3440 | _nfs4_proc_setlk(state, cmd, request), | |
3441 | &exception); | |
3442 | } while (exception.retry); | |
3443 | return err; | |
3444 | } | |
3445 | ||
3446 | static int | |
3447 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3448 | { | |
3449 | struct nfs_open_context *ctx; | |
3450 | struct nfs4_state *state; | |
3451 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3452 | int status; | |
3453 | ||
3454 | /* verify open state */ | |
3455 | ctx = (struct nfs_open_context *)filp->private_data; | |
3456 | state = ctx->state; | |
3457 | ||
3458 | if (request->fl_start < 0 || request->fl_end < 0) | |
3459 | return -EINVAL; | |
3460 | ||
3461 | if (IS_GETLK(cmd)) | |
3462 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3463 | ||
3464 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3465 | return -EINVAL; | |
3466 | ||
3467 | if (request->fl_type == F_UNLCK) | |
3468 | return nfs4_proc_unlck(state, cmd, request); | |
3469 | ||
3470 | do { | |
3471 | status = nfs4_proc_setlk(state, cmd, request); | |
3472 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3473 | break; | |
3474 | timeout = nfs4_set_lock_task_retry(timeout); | |
3475 | status = -ERESTARTSYS; | |
3476 | if (signalled()) | |
3477 | break; | |
3478 | } while(status < 0); | |
1da177e4 LT |
3479 | return status; |
3480 | } | |
3481 | ||
888e694c TM |
3482 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3483 | { | |
3484 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3485 | struct nfs4_exception exception = { }; | |
3486 | int err; | |
3487 | ||
3488 | err = nfs4_set_lock_state(state, fl); | |
3489 | if (err != 0) | |
3490 | goto out; | |
3491 | do { | |
3492 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3493 | if (err != -NFS4ERR_DELAY) | |
3494 | break; | |
3495 | err = nfs4_handle_exception(server, err, &exception); | |
3496 | } while (exception.retry); | |
3497 | out: | |
3498 | return err; | |
3499 | } | |
6b3b5496 | 3500 | |
aa1870af BF |
3501 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3502 | ||
6b3b5496 BF |
3503 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3504 | size_t buflen, int flags) | |
3505 | { | |
4b580ee3 BF |
3506 | struct inode *inode = dentry->d_inode; |
3507 | ||
3508 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3509 | return -EOPNOTSUPP; | |
3510 | ||
3511 | if (!S_ISREG(inode->i_mode) && | |
3512 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3513 | return -EPERM; | |
3514 | ||
3515 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3516 | } |
3517 | ||
3518 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3519 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3520 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3521 | * attributes in kernel-managed attribute namespaces. */ | |
3522 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3523 | size_t buflen) | |
3524 | { | |
aa1870af BF |
3525 | struct inode *inode = dentry->d_inode; |
3526 | ||
3527 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3528 | return -EOPNOTSUPP; | |
3529 | ||
3530 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3531 | } |
3532 | ||
3533 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3534 | { | |
aa1870af | 3535 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 BF |
3536 | |
3537 | if (buf && buflen < len) | |
3538 | return -ERANGE; | |
3539 | if (buf) | |
aa1870af BF |
3540 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3541 | return len; | |
6b3b5496 BF |
3542 | } |
3543 | ||
1da177e4 LT |
3544 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3545 | .recover_open = nfs4_open_reclaim, | |
3546 | .recover_lock = nfs4_lock_reclaim, | |
3547 | }; | |
3548 | ||
3549 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3550 | .recover_open = nfs4_open_expired, | |
3551 | .recover_lock = nfs4_lock_expired, | |
3552 | }; | |
3553 | ||
6b3b5496 BF |
3554 | static struct inode_operations nfs4_file_inode_operations = { |
3555 | .permission = nfs_permission, | |
3556 | .getattr = nfs_getattr, | |
3557 | .setattr = nfs_setattr, | |
3558 | .getxattr = nfs4_getxattr, | |
3559 | .setxattr = nfs4_setxattr, | |
3560 | .listxattr = nfs4_listxattr, | |
3561 | }; | |
3562 | ||
1da177e4 LT |
3563 | struct nfs_rpc_ops nfs_v4_clientops = { |
3564 | .version = 4, /* protocol version */ | |
3565 | .dentry_ops = &nfs4_dentry_operations, | |
3566 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3567 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3568 | .getroot = nfs4_proc_get_root, |
3569 | .getattr = nfs4_proc_getattr, | |
3570 | .setattr = nfs4_proc_setattr, | |
3571 | .lookup = nfs4_proc_lookup, | |
3572 | .access = nfs4_proc_access, | |
3573 | .readlink = nfs4_proc_readlink, | |
3574 | .read = nfs4_proc_read, | |
3575 | .write = nfs4_proc_write, | |
3576 | .commit = nfs4_proc_commit, | |
3577 | .create = nfs4_proc_create, | |
3578 | .remove = nfs4_proc_remove, | |
3579 | .unlink_setup = nfs4_proc_unlink_setup, | |
3580 | .unlink_done = nfs4_proc_unlink_done, | |
3581 | .rename = nfs4_proc_rename, | |
3582 | .link = nfs4_proc_link, | |
3583 | .symlink = nfs4_proc_symlink, | |
3584 | .mkdir = nfs4_proc_mkdir, | |
3585 | .rmdir = nfs4_proc_remove, | |
3586 | .readdir = nfs4_proc_readdir, | |
3587 | .mknod = nfs4_proc_mknod, | |
3588 | .statfs = nfs4_proc_statfs, | |
3589 | .fsinfo = nfs4_proc_fsinfo, | |
3590 | .pathconf = nfs4_proc_pathconf, | |
3591 | .decode_dirent = nfs4_decode_dirent, | |
3592 | .read_setup = nfs4_proc_read_setup, | |
3593 | .write_setup = nfs4_proc_write_setup, | |
3594 | .commit_setup = nfs4_proc_commit_setup, | |
02a913a7 TM |
3595 | .file_open = nfs_open, |
3596 | .file_release = nfs_release, | |
1da177e4 | 3597 | .lock = nfs4_proc_lock, |
e50a1c2e | 3598 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3599 | }; |
3600 | ||
3601 | /* | |
3602 | * Local variables: | |
3603 | * c-basic-offset: 8 | |
3604 | * End: | |
3605 | */ |