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 | ||
26e976a8 | 177 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 LT |
178 | { |
179 | struct nfs4_client *clp = server->nfs4_state; | |
180 | spin_lock(&clp->cl_lock); | |
181 | if (time_before(clp->cl_last_renewal,timestamp)) | |
182 | clp->cl_last_renewal = timestamp; | |
183 | spin_unlock(&clp->cl_lock); | |
184 | } | |
185 | ||
186 | static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) | |
187 | { | |
188 | struct nfs_inode *nfsi = NFS_I(inode); | |
189 | ||
decf491f TM |
190 | spin_lock(&inode->i_lock); |
191 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; | |
1da177e4 LT |
192 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) |
193 | nfsi->change_attr = cinfo->after; | |
decf491f | 194 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
195 | } |
196 | ||
e56e0b78 | 197 | struct nfs4_opendata { |
24ac23ab | 198 | atomic_t count; |
e56e0b78 TM |
199 | struct nfs_openargs o_arg; |
200 | struct nfs_openres o_res; | |
cdd4e68b TM |
201 | struct nfs_open_confirmargs c_arg; |
202 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
203 | struct nfs_fattr f_attr; |
204 | struct nfs_fattr dir_attr; | |
205 | struct dentry *dentry; | |
206 | struct dentry *dir; | |
207 | struct nfs4_state_owner *owner; | |
208 | struct iattr attrs; | |
26e976a8 | 209 | unsigned long timestamp; |
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 | }; |
26e976a8 | 551 | data->timestamp = jiffies; |
cdd4e68b TM |
552 | rpc_call_setup(task, &msg, 0); |
553 | } | |
554 | ||
555 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
556 | { | |
557 | struct nfs4_opendata *data = calldata; | |
558 | ||
559 | data->rpc_status = task->tk_status; | |
560 | if (RPC_ASSASSINATED(task)) | |
561 | return; | |
26e976a8 | 562 | if (data->rpc_status == 0) { |
cdd4e68b TM |
563 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
564 | sizeof(data->o_res.stateid.data)); | |
26e976a8 TM |
565 | renew_lease(data->o_res.server, data->timestamp); |
566 | } | |
cdd4e68b TM |
567 | nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid); |
568 | nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status); | |
569 | } | |
570 | ||
571 | static void nfs4_open_confirm_release(void *calldata) | |
572 | { | |
573 | struct nfs4_opendata *data = calldata; | |
574 | struct nfs4_state *state = NULL; | |
575 | ||
576 | /* If this request hasn't been cancelled, do nothing */ | |
577 | if (data->cancelled == 0) | |
578 | goto out_free; | |
579 | /* In case of error, no cleanup! */ | |
580 | if (data->rpc_status != 0) | |
581 | goto out_free; | |
582 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
583 | state = nfs4_opendata_to_nfs4_state(data); | |
584 | if (state != NULL) | |
585 | nfs4_close_state(state, data->o_arg.open_flags); | |
586 | out_free: | |
587 | nfs4_opendata_free(data); | |
588 | } | |
589 | ||
590 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
591 | .rpc_call_prepare = nfs4_open_confirm_prepare, | |
592 | .rpc_call_done = nfs4_open_confirm_done, | |
593 | .rpc_release = nfs4_open_confirm_release, | |
594 | }; | |
595 | ||
596 | /* | |
597 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
598 | */ | |
599 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
600 | { | |
601 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
602 | struct rpc_task *task; | |
1da177e4 LT |
603 | int status; |
604 | ||
cdd4e68b TM |
605 | atomic_inc(&data->count); |
606 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data); | |
607 | if (IS_ERR(task)) { | |
608 | nfs4_opendata_free(data); | |
609 | return PTR_ERR(task); | |
610 | } | |
611 | status = nfs4_wait_for_completion_rpc_task(task); | |
612 | if (status != 0) { | |
613 | data->cancelled = 1; | |
614 | smp_wmb(); | |
615 | } else | |
616 | status = data->rpc_status; | |
617 | rpc_release_task(task); | |
1da177e4 LT |
618 | return status; |
619 | } | |
620 | ||
24ac23ab | 621 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 622 | { |
24ac23ab TM |
623 | struct nfs4_opendata *data = calldata; |
624 | struct nfs4_state_owner *sp = data->owner; | |
1da177e4 LT |
625 | struct rpc_message msg = { |
626 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
24ac23ab TM |
627 | .rpc_argp = &data->o_arg, |
628 | .rpc_resp = &data->o_res, | |
1da177e4 LT |
629 | .rpc_cred = sp->so_cred, |
630 | }; | |
24ac23ab TM |
631 | |
632 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
633 | return; | |
634 | /* Update sequence id. */ | |
635 | data->o_arg.id = sp->so_id; | |
636 | data->o_arg.clientid = sp->so_client->cl_clientid; | |
864472e9 TM |
637 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) |
638 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
26e976a8 | 639 | data->timestamp = jiffies; |
24ac23ab TM |
640 | rpc_call_setup(task, &msg, 0); |
641 | } | |
1da177e4 | 642 | |
24ac23ab TM |
643 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
644 | { | |
645 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 646 | |
24ac23ab TM |
647 | data->rpc_status = task->tk_status; |
648 | if (RPC_ASSASSINATED(task)) | |
649 | return; | |
650 | if (task->tk_status == 0) { | |
651 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
652 | case S_IFREG: |
653 | break; | |
654 | case S_IFLNK: | |
24ac23ab | 655 | data->rpc_status = -ELOOP; |
6f926b5b TM |
656 | break; |
657 | case S_IFDIR: | |
24ac23ab | 658 | data->rpc_status = -EISDIR; |
6f926b5b TM |
659 | break; |
660 | default: | |
24ac23ab | 661 | data->rpc_status = -ENOTDIR; |
6f926b5b | 662 | } |
26e976a8 | 663 | renew_lease(data->o_res.server, data->timestamp); |
6f926b5b | 664 | } |
24ac23ab TM |
665 | nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid); |
666 | } | |
6f926b5b | 667 | |
24ac23ab TM |
668 | static void nfs4_open_release(void *calldata) |
669 | { | |
670 | struct nfs4_opendata *data = calldata; | |
671 | struct nfs4_state *state = NULL; | |
672 | ||
673 | /* If this request hasn't been cancelled, do nothing */ | |
674 | if (data->cancelled == 0) | |
675 | goto out_free; | |
676 | /* In case of error, no cleanup! */ | |
677 | if (data->rpc_status != 0) | |
678 | goto out_free; | |
679 | /* In case we need an open_confirm, no cleanup! */ | |
680 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
681 | goto out_free; | |
682 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
683 | state = nfs4_opendata_to_nfs4_state(data); | |
684 | if (state != NULL) | |
685 | nfs4_close_state(state, data->o_arg.open_flags); | |
686 | out_free: | |
687 | nfs4_opendata_free(data); | |
688 | } | |
689 | ||
690 | static const struct rpc_call_ops nfs4_open_ops = { | |
691 | .rpc_call_prepare = nfs4_open_prepare, | |
692 | .rpc_call_done = nfs4_open_done, | |
693 | .rpc_release = nfs4_open_release, | |
694 | }; | |
695 | ||
696 | /* | |
697 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
698 | */ | |
699 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
700 | { | |
701 | struct inode *dir = data->dir->d_inode; | |
702 | struct nfs_server *server = NFS_SERVER(dir); | |
703 | struct nfs_openargs *o_arg = &data->o_arg; | |
704 | struct nfs_openres *o_res = &data->o_res; | |
705 | struct rpc_task *task; | |
706 | int status; | |
707 | ||
708 | atomic_inc(&data->count); | |
709 | task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data); | |
710 | if (IS_ERR(task)) { | |
711 | nfs4_opendata_free(data); | |
712 | return PTR_ERR(task); | |
713 | } | |
714 | status = nfs4_wait_for_completion_rpc_task(task); | |
715 | if (status != 0) { | |
716 | data->cancelled = 1; | |
717 | smp_wmb(); | |
718 | } else | |
719 | status = data->rpc_status; | |
720 | rpc_release_task(task); | |
1da177e4 | 721 | if (status != 0) |
24ac23ab TM |
722 | return status; |
723 | ||
56ae19f3 TM |
724 | if (o_arg->open_flags & O_CREAT) { |
725 | update_changeattr(dir, &o_res->cinfo); | |
726 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
727 | } else | |
728 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 729 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 730 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 731 | if (status != 0) |
24ac23ab | 732 | return status; |
1da177e4 | 733 | } |
24ac23ab | 734 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
1da177e4 | 735 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
24ac23ab TM |
736 | return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); |
737 | return 0; | |
1da177e4 LT |
738 | } |
739 | ||
740 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
741 | { | |
742 | struct nfs_access_entry cache; | |
743 | int mask = 0; | |
744 | int status; | |
745 | ||
746 | if (openflags & FMODE_READ) | |
747 | mask |= MAY_READ; | |
748 | if (openflags & FMODE_WRITE) | |
749 | mask |= MAY_WRITE; | |
750 | status = nfs_access_get_cached(inode, cred, &cache); | |
751 | if (status == 0) | |
752 | goto out; | |
753 | ||
754 | /* Be clever: ask server to check for all possible rights */ | |
755 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
756 | cache.cred = cred; | |
757 | cache.jiffies = jiffies; | |
758 | status = _nfs4_proc_access(inode, &cache); | |
759 | if (status != 0) | |
760 | return status; | |
761 | nfs_access_add_cache(inode, &cache); | |
762 | out: | |
763 | if ((cache.mask & mask) == mask) | |
764 | return 0; | |
765 | return -EACCES; | |
766 | } | |
767 | ||
768 | /* | |
769 | * OPEN_EXPIRED: | |
770 | * reclaim state on the server after a network partition. | |
771 | * Assumes caller holds the appropriate lock | |
772 | */ | |
773 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
774 | { | |
1da177e4 | 775 | struct inode *inode = state->inode; |
1da177e4 | 776 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; |
e56e0b78 | 777 | struct nfs4_opendata *opendata; |
24ac23ab | 778 | int openflags = state->state & (FMODE_READ|FMODE_WRITE); |
864472e9 | 779 | int ret; |
1da177e4 LT |
780 | |
781 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
864472e9 TM |
782 | ret = _nfs4_do_access(inode, sp->so_cred, openflags); |
783 | if (ret < 0) | |
784 | return ret; | |
1da177e4 LT |
785 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); |
786 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
864472e9 | 787 | return 0; |
1da177e4 | 788 | } |
24ac23ab | 789 | opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL); |
e56e0b78 | 790 | if (opendata == NULL) |
864472e9 TM |
791 | return -ENOMEM; |
792 | ret = nfs4_open_recover(opendata, state); | |
793 | if (ret == -ESTALE) { | |
794 | /* Invalidate the state owner so we don't ever use it again */ | |
795 | nfs4_drop_state_owner(sp); | |
796 | d_drop(dentry); | |
1da177e4 | 797 | } |
e56e0b78 | 798 | nfs4_opendata_free(opendata); |
864472e9 | 799 | return ret; |
1da177e4 LT |
800 | } |
801 | ||
202b50dc TM |
802 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
803 | { | |
804 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
805 | struct nfs4_exception exception = { }; | |
806 | int err; | |
807 | ||
808 | do { | |
809 | err = _nfs4_open_expired(sp, state, dentry); | |
810 | if (err == -NFS4ERR_DELAY) | |
811 | nfs4_handle_exception(server, err, &exception); | |
812 | } while (exception.retry); | |
813 | return err; | |
814 | } | |
815 | ||
1da177e4 LT |
816 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
817 | { | |
1da177e4 | 818 | struct nfs_open_context *ctx; |
864472e9 | 819 | int ret; |
1da177e4 | 820 | |
864472e9 TM |
821 | ctx = nfs4_state_find_open_context(state); |
822 | if (IS_ERR(ctx)) | |
823 | return PTR_ERR(ctx); | |
824 | ret = nfs4_do_open_expired(sp, state, ctx->dentry); | |
825 | put_nfs_open_context(ctx); | |
826 | return ret; | |
1da177e4 LT |
827 | } |
828 | ||
829 | /* | |
24ac23ab | 830 | * Returns a referenced nfs4_state if there is an open delegation on the file |
1da177e4 LT |
831 | */ |
832 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
833 | { | |
834 | struct nfs_delegation *delegation; | |
835 | struct nfs_server *server = NFS_SERVER(inode); | |
836 | struct nfs4_client *clp = server->nfs4_state; | |
837 | struct nfs_inode *nfsi = NFS_I(inode); | |
838 | struct nfs4_state_owner *sp = NULL; | |
839 | struct nfs4_state *state = NULL; | |
840 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
841 | int err; | |
842 | ||
843 | /* Protect against reboot recovery - NOTE ORDER! */ | |
844 | down_read(&clp->cl_sem); | |
845 | /* Protect against delegation recall */ | |
846 | down_read(&nfsi->rwsem); | |
847 | delegation = NFS_I(inode)->delegation; | |
848 | err = -ENOENT; | |
849 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
850 | goto out_err; | |
851 | err = -ENOMEM; | |
852 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
853 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
854 | goto out_err; | |
855 | } | |
1da177e4 LT |
856 | state = nfs4_get_open_state(inode, sp); |
857 | if (state == NULL) | |
858 | goto out_err; | |
859 | ||
860 | err = -ENOENT; | |
861 | if ((state->state & open_flags) == open_flags) { | |
862 | spin_lock(&inode->i_lock); | |
e7616923 | 863 | update_open_stateflags(state, open_flags); |
1da177e4 LT |
864 | spin_unlock(&inode->i_lock); |
865 | goto out_ok; | |
866 | } else if (state->state != 0) | |
867 | goto out_err; | |
868 | ||
869 | lock_kernel(); | |
870 | err = _nfs4_do_access(inode, cred, open_flags); | |
871 | unlock_kernel(); | |
872 | if (err != 0) | |
873 | goto out_err; | |
874 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
875 | update_open_stateid(state, &delegation->stateid, open_flags); | |
876 | out_ok: | |
1da177e4 LT |
877 | nfs4_put_state_owner(sp); |
878 | up_read(&nfsi->rwsem); | |
879 | up_read(&clp->cl_sem); | |
1da177e4 LT |
880 | *res = state; |
881 | return 0; | |
882 | out_err: | |
883 | if (sp != NULL) { | |
884 | if (state != NULL) | |
885 | nfs4_put_open_state(state); | |
1da177e4 LT |
886 | nfs4_put_state_owner(sp); |
887 | } | |
888 | up_read(&nfsi->rwsem); | |
889 | up_read(&clp->cl_sem); | |
b8e5c4c2 TM |
890 | if (err != -EACCES) |
891 | nfs_inode_return_delegation(inode); | |
1da177e4 LT |
892 | return err; |
893 | } | |
894 | ||
895 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
896 | { | |
897 | struct nfs4_exception exception = { }; | |
898 | struct nfs4_state *res; | |
899 | int err; | |
900 | ||
901 | do { | |
902 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
903 | if (err == 0) | |
904 | break; | |
905 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
906 | err, &exception)); | |
907 | } while (exception.retry); | |
908 | return res; | |
909 | } | |
910 | ||
911 | /* | |
24ac23ab | 912 | * Returns a referenced nfs4_state |
1da177e4 LT |
913 | */ |
914 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
915 | { | |
916 | struct nfs4_state_owner *sp; | |
917 | struct nfs4_state *state = NULL; | |
918 | struct nfs_server *server = NFS_SERVER(dir); | |
919 | struct nfs4_client *clp = server->nfs4_state; | |
e56e0b78 | 920 | struct nfs4_opendata *opendata; |
1da177e4 | 921 | int status; |
1da177e4 LT |
922 | |
923 | /* Protect against reboot recovery conflicts */ | |
924 | down_read(&clp->cl_sem); | |
925 | status = -ENOMEM; | |
926 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
927 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
928 | goto out_err; | |
929 | } | |
e56e0b78 TM |
930 | opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr); |
931 | if (opendata == NULL) | |
932 | goto err_put_state_owner; | |
1da177e4 | 933 | |
24ac23ab | 934 | status = _nfs4_proc_open(opendata); |
1da177e4 | 935 | if (status != 0) |
e56e0b78 | 936 | goto err_opendata_free; |
1da177e4 LT |
937 | |
938 | status = -ENOMEM; | |
24ac23ab TM |
939 | state = nfs4_opendata_to_nfs4_state(opendata); |
940 | if (state == NULL) | |
e56e0b78 | 941 | goto err_opendata_free; |
e56e0b78 | 942 | if (opendata->o_res.delegation_type != 0) |
24ac23ab | 943 | nfs_inode_set_delegation(state->inode, cred, &opendata->o_res); |
e56e0b78 | 944 | nfs4_opendata_free(opendata); |
1da177e4 LT |
945 | nfs4_put_state_owner(sp); |
946 | up_read(&clp->cl_sem); | |
947 | *res = state; | |
948 | return 0; | |
e56e0b78 TM |
949 | err_opendata_free: |
950 | nfs4_opendata_free(opendata); | |
951 | err_put_state_owner: | |
952 | nfs4_put_state_owner(sp); | |
1da177e4 | 953 | out_err: |
1da177e4 LT |
954 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ |
955 | up_read(&clp->cl_sem); | |
1da177e4 LT |
956 | *res = NULL; |
957 | return status; | |
958 | } | |
959 | ||
960 | ||
961 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
962 | { | |
963 | struct nfs4_exception exception = { }; | |
964 | struct nfs4_state *res; | |
965 | int status; | |
966 | ||
967 | do { | |
968 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); | |
969 | if (status == 0) | |
970 | break; | |
971 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
972 | * book-keeping w.r.t. state-changing operations | |
973 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
974 | * It is actually a sign of a bug on the client or on the server. | |
975 | * | |
976 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 977 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
978 | * have unhashed the old state_owner for us, and that we can |
979 | * therefore safely retry using a new one. We should still warn | |
980 | * the user though... | |
981 | */ | |
982 | if (status == -NFS4ERR_BAD_SEQID) { | |
983 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
984 | exception.retry = 1; | |
985 | continue; | |
986 | } | |
550f5747 TM |
987 | /* |
988 | * BAD_STATEID on OPEN means that the server cancelled our | |
989 | * state before it received the OPEN_CONFIRM. | |
990 | * Recover by retrying the request as per the discussion | |
991 | * on Page 181 of RFC3530. | |
992 | */ | |
993 | if (status == -NFS4ERR_BAD_STATEID) { | |
994 | exception.retry = 1; | |
995 | continue; | |
996 | } | |
1da177e4 LT |
997 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
998 | status, &exception)); | |
999 | } while (exception.retry); | |
1000 | return res; | |
1001 | } | |
1002 | ||
1003 | static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
1004 | struct nfs_fh *fhandle, struct iattr *sattr, | |
1005 | struct nfs4_state *state) | |
1006 | { | |
1007 | struct nfs_setattrargs arg = { | |
1008 | .fh = fhandle, | |
1009 | .iap = sattr, | |
1010 | .server = server, | |
1011 | .bitmask = server->attr_bitmask, | |
1012 | }; | |
1013 | struct nfs_setattrres res = { | |
1014 | .fattr = fattr, | |
1015 | .server = server, | |
1016 | }; | |
1017 | struct rpc_message msg = { | |
1018 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1019 | .rpc_argp = &arg, | |
1020 | .rpc_resp = &res, | |
1021 | }; | |
26e976a8 | 1022 | unsigned long timestamp = jiffies; |
65e4308d | 1023 | int status; |
1da177e4 | 1024 | |
0e574af1 | 1025 | nfs_fattr_init(fattr); |
1da177e4 | 1026 | |
08e9eac4 | 1027 | if (state != NULL) { |
1da177e4 | 1028 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
1029 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1030 | } else | |
1da177e4 LT |
1031 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1032 | ||
65e4308d | 1033 | status = rpc_call_sync(server->client, &msg, 0); |
26e976a8 TM |
1034 | if (status == 0 && state != NULL) |
1035 | renew_lease(server, timestamp); | |
65e4308d | 1036 | return status; |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
1040 | struct nfs_fh *fhandle, struct iattr *sattr, | |
1041 | struct nfs4_state *state) | |
1042 | { | |
1043 | struct nfs4_exception exception = { }; | |
1044 | int err; | |
1045 | do { | |
1046 | err = nfs4_handle_exception(server, | |
1047 | _nfs4_do_setattr(server, fattr, fhandle, sattr, | |
1048 | state), | |
1049 | &exception); | |
1050 | } while (exception.retry); | |
1051 | return err; | |
1052 | } | |
1053 | ||
1054 | struct nfs4_closedata { | |
1055 | struct inode *inode; | |
1056 | struct nfs4_state *state; | |
1057 | struct nfs_closeargs arg; | |
1058 | struct nfs_closeres res; | |
516a6af6 | 1059 | struct nfs_fattr fattr; |
26e976a8 | 1060 | unsigned long timestamp; |
1da177e4 LT |
1061 | }; |
1062 | ||
963d8fe5 | 1063 | static void nfs4_free_closedata(void *data) |
9512135d | 1064 | { |
963d8fe5 TM |
1065 | struct nfs4_closedata *calldata = data; |
1066 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1067 | |
1068 | nfs4_put_open_state(calldata->state); | |
1069 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1070 | nfs4_put_state_owner(sp); |
9512135d TM |
1071 | kfree(calldata); |
1072 | } | |
1073 | ||
963d8fe5 | 1074 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1075 | { |
963d8fe5 | 1076 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1077 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1078 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1079 | ||
4ce70ada TM |
1080 | if (RPC_ASSASSINATED(task)) |
1081 | return; | |
1da177e4 LT |
1082 | /* hmm. we are done with the inode, and in the process of freeing |
1083 | * the state_owner. we keep this around to process errors | |
1084 | */ | |
cee54fc9 | 1085 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
1086 | switch (task->tk_status) { |
1087 | case 0: | |
1088 | memcpy(&state->stateid, &calldata->res.stateid, | |
1089 | sizeof(state->stateid)); | |
26e976a8 | 1090 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1091 | break; |
1092 | case -NFS4ERR_STALE_STATEID: | |
1093 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
1094 | nfs4_schedule_state_recovery(server->nfs4_state); |
1095 | break; | |
1096 | default: | |
1097 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
1098 | rpc_restart_call(task); | |
1099 | return; | |
1100 | } | |
1101 | } | |
516a6af6 | 1102 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1103 | } |
1104 | ||
4ce70ada | 1105 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1106 | { |
4ce70ada | 1107 | struct nfs4_closedata *calldata = data; |
9512135d | 1108 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1109 | struct rpc_message msg = { |
1110 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1111 | .rpc_argp = &calldata->arg, | |
1112 | .rpc_resp = &calldata->res, | |
9512135d | 1113 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 1114 | }; |
4cecb76f | 1115 | int mode = 0, old_mode; |
9512135d | 1116 | |
963d8fe5 | 1117 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1118 | return; |
9512135d TM |
1119 | /* Recalculate the new open mode in case someone reopened the file |
1120 | * while we were waiting in line to be scheduled. | |
1121 | */ | |
4cecb76f TM |
1122 | spin_lock(&state->owner->so_lock); |
1123 | spin_lock(&calldata->inode->i_lock); | |
1124 | mode = old_mode = state->state; | |
e7616923 TM |
1125 | if (state->n_rdwr == 0) { |
1126 | if (state->n_rdonly == 0) | |
1127 | mode &= ~FMODE_READ; | |
1128 | if (state->n_wronly == 0) | |
1129 | mode &= ~FMODE_WRITE; | |
1130 | } | |
4cecb76f TM |
1131 | nfs4_state_set_mode_locked(state, mode); |
1132 | spin_unlock(&calldata->inode->i_lock); | |
1133 | spin_unlock(&state->owner->so_lock); | |
1134 | if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
963d8fe5 TM |
1135 | /* Note: exit _without_ calling nfs4_close_done */ |
1136 | task->tk_action = NULL; | |
9512135d TM |
1137 | return; |
1138 | } | |
516a6af6 | 1139 | nfs_fattr_init(calldata->res.fattr); |
9512135d | 1140 | if (mode != 0) |
1da177e4 | 1141 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d | 1142 | calldata->arg.open_flags = mode; |
26e976a8 | 1143 | calldata->timestamp = jiffies; |
9512135d | 1144 | rpc_call_setup(task, &msg, 0); |
1da177e4 LT |
1145 | } |
1146 | ||
963d8fe5 | 1147 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1148 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1149 | .rpc_call_done = nfs4_close_done, |
1150 | .rpc_release = nfs4_free_closedata, | |
1151 | }; | |
1152 | ||
1da177e4 LT |
1153 | /* |
1154 | * It is possible for data to be read/written from a mem-mapped file | |
1155 | * after the sys_close call (which hits the vfs layer as a flush). | |
1156 | * This means that we can't safely call nfsv4 close on a file until | |
1157 | * the inode is cleared. This in turn means that we are not good | |
1158 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1159 | * share state even when we are done with one of the three share | |
1160 | * stateid's in the inode. | |
1161 | * | |
1162 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1163 | */ | |
4cecb76f | 1164 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state) |
1da177e4 | 1165 | { |
516a6af6 | 1166 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1167 | struct nfs4_closedata *calldata; |
9512135d | 1168 | int status = -ENOMEM; |
1da177e4 | 1169 | |
9512135d | 1170 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1171 | if (calldata == NULL) |
9512135d | 1172 | goto out; |
1da177e4 LT |
1173 | calldata->inode = inode; |
1174 | calldata->state = state; | |
1175 | calldata->arg.fh = NFS_FH(inode); | |
9512135d | 1176 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 1177 | /* Serialization for the sequence id */ |
cee54fc9 | 1178 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1179 | if (calldata->arg.seqid == NULL) |
1180 | goto out_free_calldata; | |
516a6af6 TM |
1181 | calldata->arg.bitmask = server->attr_bitmask; |
1182 | calldata->res.fattr = &calldata->fattr; | |
1183 | calldata->res.server = server; | |
9512135d | 1184 | |
4ce70ada | 1185 | status = nfs4_call_async(server->client, &nfs4_close_ops, calldata); |
9512135d TM |
1186 | if (status == 0) |
1187 | goto out; | |
1188 | ||
1189 | nfs_free_seqid(calldata->arg.seqid); | |
1190 | out_free_calldata: | |
1191 | kfree(calldata); | |
1192 | out: | |
1193 | return status; | |
1da177e4 LT |
1194 | } |
1195 | ||
02a913a7 TM |
1196 | static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state) |
1197 | { | |
1198 | struct file *filp; | |
1199 | ||
1200 | filp = lookup_instantiate_filp(nd, dentry, NULL); | |
1201 | if (!IS_ERR(filp)) { | |
1202 | struct nfs_open_context *ctx; | |
1203 | ctx = (struct nfs_open_context *)filp->private_data; | |
1204 | ctx->state = state; | |
1205 | } else | |
1206 | nfs4_close_state(state, nd->intent.open.flags); | |
1207 | } | |
1208 | ||
1209 | struct dentry * | |
1da177e4 LT |
1210 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1211 | { | |
1212 | struct iattr attr; | |
1213 | struct rpc_cred *cred; | |
1214 | struct nfs4_state *state; | |
02a913a7 | 1215 | struct dentry *res; |
1da177e4 LT |
1216 | |
1217 | if (nd->flags & LOOKUP_CREATE) { | |
1218 | attr.ia_mode = nd->intent.open.create_mode; | |
1219 | attr.ia_valid = ATTR_MODE; | |
1220 | if (!IS_POSIXACL(dir)) | |
1221 | attr.ia_mode &= ~current->fs->umask; | |
1222 | } else { | |
1223 | attr.ia_valid = 0; | |
1224 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1225 | } | |
1226 | ||
1227 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1228 | if (IS_ERR(cred)) | |
02a913a7 | 1229 | return (struct dentry *)cred; |
1da177e4 LT |
1230 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); |
1231 | put_rpccred(cred); | |
02a913a7 TM |
1232 | if (IS_ERR(state)) { |
1233 | if (PTR_ERR(state) == -ENOENT) | |
1234 | d_add(dentry, NULL); | |
1235 | return (struct dentry *)state; | |
1236 | } | |
24ac23ab | 1237 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 TM |
1238 | if (res != NULL) |
1239 | dentry = res; | |
1240 | nfs4_intent_set_file(nd, dentry, state); | |
1241 | return res; | |
1da177e4 LT |
1242 | } |
1243 | ||
1244 | int | |
02a913a7 | 1245 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 LT |
1246 | { |
1247 | struct rpc_cred *cred; | |
1248 | struct nfs4_state *state; | |
1da177e4 LT |
1249 | |
1250 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1251 | if (IS_ERR(cred)) | |
1252 | return PTR_ERR(cred); | |
1253 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
1254 | if (IS_ERR(state)) | |
1255 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); | |
1256 | put_rpccred(cred); | |
02a913a7 TM |
1257 | if (IS_ERR(state)) { |
1258 | switch (PTR_ERR(state)) { | |
1259 | case -EPERM: | |
1260 | case -EACCES: | |
1261 | case -EDQUOT: | |
1262 | case -ENOSPC: | |
1263 | case -EROFS: | |
1264 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1265 | return 1; | |
1266 | case -ENOENT: | |
1267 | if (dentry->d_inode == NULL) | |
1268 | return 1; | |
1269 | } | |
1270 | goto out_drop; | |
1271 | } | |
24ac23ab | 1272 | if (state->inode == dentry->d_inode) { |
02a913a7 | 1273 | nfs4_intent_set_file(nd, dentry, state); |
1da177e4 LT |
1274 | return 1; |
1275 | } | |
1da177e4 | 1276 | nfs4_close_state(state, openflags); |
02a913a7 TM |
1277 | out_drop: |
1278 | d_drop(dentry); | |
1da177e4 LT |
1279 | return 0; |
1280 | } | |
1281 | ||
1282 | ||
1283 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1284 | { | |
1285 | struct nfs4_server_caps_res res = {}; | |
1286 | struct rpc_message msg = { | |
1287 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1288 | .rpc_argp = fhandle, | |
1289 | .rpc_resp = &res, | |
1290 | }; | |
1291 | int status; | |
1292 | ||
1293 | status = rpc_call_sync(server->client, &msg, 0); | |
1294 | if (status == 0) { | |
1295 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1296 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1297 | server->caps |= NFS_CAP_ACLS; | |
1298 | if (res.has_links != 0) | |
1299 | server->caps |= NFS_CAP_HARDLINKS; | |
1300 | if (res.has_symlinks != 0) | |
1301 | server->caps |= NFS_CAP_SYMLINKS; | |
1302 | server->acl_bitmask = res.acl_bitmask; | |
1303 | } | |
1304 | return status; | |
1305 | } | |
1306 | ||
1307 | static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1308 | { | |
1309 | struct nfs4_exception exception = { }; | |
1310 | int err; | |
1311 | do { | |
1312 | err = nfs4_handle_exception(server, | |
1313 | _nfs4_server_capabilities(server, fhandle), | |
1314 | &exception); | |
1315 | } while (exception.retry); | |
1316 | return err; | |
1317 | } | |
1318 | ||
1319 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1320 | struct nfs_fsinfo *info) | |
1321 | { | |
1da177e4 LT |
1322 | struct nfs4_lookup_root_arg args = { |
1323 | .bitmask = nfs4_fattr_bitmap, | |
1324 | }; | |
1325 | struct nfs4_lookup_res res = { | |
1326 | .server = server, | |
0e574af1 | 1327 | .fattr = info->fattr, |
1da177e4 LT |
1328 | .fh = fhandle, |
1329 | }; | |
1330 | struct rpc_message msg = { | |
1331 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1332 | .rpc_argp = &args, | |
1333 | .rpc_resp = &res, | |
1334 | }; | |
0e574af1 | 1335 | nfs_fattr_init(info->fattr); |
1da177e4 LT |
1336 | return rpc_call_sync(server->client, &msg, 0); |
1337 | } | |
1338 | ||
1339 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1340 | struct nfs_fsinfo *info) | |
1341 | { | |
1342 | struct nfs4_exception exception = { }; | |
1343 | int err; | |
1344 | do { | |
1345 | err = nfs4_handle_exception(server, | |
1346 | _nfs4_lookup_root(server, fhandle, info), | |
1347 | &exception); | |
1348 | } while (exception.retry); | |
1349 | return err; | |
1350 | } | |
1351 | ||
1352 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1353 | struct nfs_fsinfo *info) | |
1354 | { | |
1355 | struct nfs_fattr * fattr = info->fattr; | |
1356 | unsigned char * p; | |
1357 | struct qstr q; | |
1358 | struct nfs4_lookup_arg args = { | |
1359 | .dir_fh = fhandle, | |
1360 | .name = &q, | |
1361 | .bitmask = nfs4_fattr_bitmap, | |
1362 | }; | |
1363 | struct nfs4_lookup_res res = { | |
1364 | .server = server, | |
1365 | .fattr = fattr, | |
1366 | .fh = fhandle, | |
1367 | }; | |
1368 | struct rpc_message msg = { | |
1369 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1370 | .rpc_argp = &args, | |
1371 | .rpc_resp = &res, | |
1372 | }; | |
1373 | int status; | |
1374 | ||
1375 | /* | |
1376 | * Now we do a separate LOOKUP for each component of the mount path. | |
1377 | * The LOOKUPs are done separately so that we can conveniently | |
1378 | * catch an ERR_WRONGSEC if it occurs along the way... | |
1379 | */ | |
1380 | status = nfs4_lookup_root(server, fhandle, info); | |
1381 | if (status) | |
1382 | goto out; | |
1383 | ||
1384 | p = server->mnt_path; | |
1385 | for (;;) { | |
1386 | struct nfs4_exception exception = { }; | |
1387 | ||
1388 | while (*p == '/') | |
1389 | p++; | |
1390 | if (!*p) | |
1391 | break; | |
1392 | q.name = p; | |
1393 | while (*p && (*p != '/')) | |
1394 | p++; | |
1395 | q.len = p - q.name; | |
1396 | ||
1397 | do { | |
0e574af1 | 1398 | nfs_fattr_init(fattr); |
1da177e4 LT |
1399 | status = nfs4_handle_exception(server, |
1400 | rpc_call_sync(server->client, &msg, 0), | |
1401 | &exception); | |
1402 | } while (exception.retry); | |
1403 | if (status == 0) | |
1404 | continue; | |
1405 | if (status == -ENOENT) { | |
1406 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); | |
1407 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); | |
1408 | } | |
1409 | break; | |
1410 | } | |
1411 | if (status == 0) | |
1412 | status = nfs4_server_capabilities(server, fhandle); | |
1413 | if (status == 0) | |
1414 | status = nfs4_do_fsinfo(server, fhandle, info); | |
1415 | out: | |
1416 | return status; | |
1417 | } | |
1418 | ||
1419 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1420 | { | |
1421 | struct nfs4_getattr_arg args = { | |
1422 | .fh = fhandle, | |
1423 | .bitmask = server->attr_bitmask, | |
1424 | }; | |
1425 | struct nfs4_getattr_res res = { | |
1426 | .fattr = fattr, | |
1427 | .server = server, | |
1428 | }; | |
1429 | struct rpc_message msg = { | |
1430 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1431 | .rpc_argp = &args, | |
1432 | .rpc_resp = &res, | |
1433 | }; | |
1434 | ||
0e574af1 | 1435 | nfs_fattr_init(fattr); |
1da177e4 LT |
1436 | return rpc_call_sync(server->client, &msg, 0); |
1437 | } | |
1438 | ||
1439 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1440 | { | |
1441 | struct nfs4_exception exception = { }; | |
1442 | int err; | |
1443 | do { | |
1444 | err = nfs4_handle_exception(server, | |
1445 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1446 | &exception); | |
1447 | } while (exception.retry); | |
1448 | return err; | |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * The file is not closed if it is opened due to the a request to change | |
1453 | * the size of the file. The open call will not be needed once the | |
1454 | * VFS layer lookup-intents are implemented. | |
1455 | * | |
1456 | * Close is called when the inode is destroyed. | |
1457 | * If we haven't opened the file for O_WRONLY, we | |
1458 | * need to in the size_change case to obtain a stateid. | |
1459 | * | |
1460 | * Got race? | |
1461 | * Because OPEN is always done by name in nfsv4, it is | |
1462 | * possible that we opened a different file by the same | |
1463 | * name. We can recognize this race condition, but we | |
1464 | * can't do anything about it besides returning an error. | |
1465 | * | |
1466 | * This will be fixed with VFS changes (lookup-intent). | |
1467 | */ | |
1468 | static int | |
1469 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1470 | struct iattr *sattr) | |
1471 | { | |
08e9eac4 TM |
1472 | struct rpc_cred *cred; |
1473 | struct inode *inode = dentry->d_inode; | |
d530838b TM |
1474 | struct nfs_open_context *ctx; |
1475 | struct nfs4_state *state = NULL; | |
1da177e4 LT |
1476 | int status; |
1477 | ||
0e574af1 | 1478 | nfs_fattr_init(fattr); |
1da177e4 | 1479 | |
08e9eac4 TM |
1480 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
1481 | if (IS_ERR(cred)) | |
1482 | return PTR_ERR(cred); | |
d530838b TM |
1483 | |
1484 | /* Search for an existing open(O_WRITE) file */ | |
1485 | ctx = nfs_find_open_context(inode, cred, FMODE_WRITE); | |
1486 | if (ctx != NULL) | |
1487 | state = ctx->state; | |
08e9eac4 | 1488 | |
1da177e4 LT |
1489 | status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
1490 | NFS_FH(inode), sattr, state); | |
65e4308d TM |
1491 | if (status == 0) |
1492 | nfs_setattr_update_inode(inode, sattr); | |
d530838b TM |
1493 | if (ctx != NULL) |
1494 | put_nfs_open_context(ctx); | |
08e9eac4 | 1495 | put_rpccred(cred); |
1da177e4 LT |
1496 | return status; |
1497 | } | |
1498 | ||
1499 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
1500 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1501 | { | |
1502 | int status; | |
1503 | struct nfs_server *server = NFS_SERVER(dir); | |
1504 | struct nfs4_lookup_arg args = { | |
1505 | .bitmask = server->attr_bitmask, | |
1506 | .dir_fh = NFS_FH(dir), | |
1507 | .name = name, | |
1508 | }; | |
1509 | struct nfs4_lookup_res res = { | |
1510 | .server = server, | |
1511 | .fattr = fattr, | |
1512 | .fh = fhandle, | |
1513 | }; | |
1514 | struct rpc_message msg = { | |
1515 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1516 | .rpc_argp = &args, | |
1517 | .rpc_resp = &res, | |
1518 | }; | |
1519 | ||
0e574af1 | 1520 | nfs_fattr_init(fattr); |
1da177e4 LT |
1521 | |
1522 | dprintk("NFS call lookup %s\n", name->name); | |
1523 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1524 | dprintk("NFS reply lookup: %d\n", status); | |
1525 | return status; | |
1526 | } | |
1527 | ||
1528 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1529 | { | |
1530 | struct nfs4_exception exception = { }; | |
1531 | int err; | |
1532 | do { | |
1533 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1534 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1535 | &exception); | |
1536 | } while (exception.retry); | |
1537 | return err; | |
1538 | } | |
1539 | ||
1540 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1541 | { | |
1542 | struct nfs4_accessargs args = { | |
1543 | .fh = NFS_FH(inode), | |
1544 | }; | |
1545 | struct nfs4_accessres res = { 0 }; | |
1546 | struct rpc_message msg = { | |
1547 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1548 | .rpc_argp = &args, | |
1549 | .rpc_resp = &res, | |
1550 | .rpc_cred = entry->cred, | |
1551 | }; | |
1552 | int mode = entry->mask; | |
1553 | int status; | |
1554 | ||
1555 | /* | |
1556 | * Determine which access bits we want to ask for... | |
1557 | */ | |
1558 | if (mode & MAY_READ) | |
1559 | args.access |= NFS4_ACCESS_READ; | |
1560 | if (S_ISDIR(inode->i_mode)) { | |
1561 | if (mode & MAY_WRITE) | |
1562 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1563 | if (mode & MAY_EXEC) | |
1564 | args.access |= NFS4_ACCESS_LOOKUP; | |
1565 | } else { | |
1566 | if (mode & MAY_WRITE) | |
1567 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1568 | if (mode & MAY_EXEC) | |
1569 | args.access |= NFS4_ACCESS_EXECUTE; | |
1570 | } | |
1571 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1572 | if (!status) { | |
1573 | entry->mask = 0; | |
1574 | if (res.access & NFS4_ACCESS_READ) | |
1575 | entry->mask |= MAY_READ; | |
1576 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1577 | entry->mask |= MAY_WRITE; | |
1578 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1579 | entry->mask |= MAY_EXEC; | |
1580 | } | |
1581 | return status; | |
1582 | } | |
1583 | ||
1584 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1585 | { | |
1586 | struct nfs4_exception exception = { }; | |
1587 | int err; | |
1588 | do { | |
1589 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1590 | _nfs4_proc_access(inode, entry), | |
1591 | &exception); | |
1592 | } while (exception.retry); | |
1593 | return err; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * TODO: For the time being, we don't try to get any attributes | |
1598 | * along with any of the zero-copy operations READ, READDIR, | |
1599 | * READLINK, WRITE. | |
1600 | * | |
1601 | * In the case of the first three, we want to put the GETATTR | |
1602 | * after the read-type operation -- this is because it is hard | |
1603 | * to predict the length of a GETATTR response in v4, and thus | |
1604 | * align the READ data correctly. This means that the GETATTR | |
1605 | * may end up partially falling into the page cache, and we should | |
1606 | * shift it into the 'tail' of the xdr_buf before processing. | |
1607 | * To do this efficiently, we need to know the total length | |
1608 | * of data received, which doesn't seem to be available outside | |
1609 | * of the RPC layer. | |
1610 | * | |
1611 | * In the case of WRITE, we also want to put the GETATTR after | |
1612 | * the operation -- in this case because we want to make sure | |
1613 | * we get the post-operation mtime and size. This means that | |
1614 | * we can't use xdr_encode_pages() as written: we need a variant | |
1615 | * of it which would leave room in the 'tail' iovec. | |
1616 | * | |
1617 | * Both of these changes to the XDR layer would in fact be quite | |
1618 | * minor, but I decided to leave them for a subsequent patch. | |
1619 | */ | |
1620 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1621 | unsigned int pgbase, unsigned int pglen) | |
1622 | { | |
1623 | struct nfs4_readlink args = { | |
1624 | .fh = NFS_FH(inode), | |
1625 | .pgbase = pgbase, | |
1626 | .pglen = pglen, | |
1627 | .pages = &page, | |
1628 | }; | |
1629 | struct rpc_message msg = { | |
1630 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1631 | .rpc_argp = &args, | |
1632 | .rpc_resp = NULL, | |
1633 | }; | |
1634 | ||
1635 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1636 | } | |
1637 | ||
1638 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1639 | unsigned int pgbase, unsigned int pglen) | |
1640 | { | |
1641 | struct nfs4_exception exception = { }; | |
1642 | int err; | |
1643 | do { | |
1644 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1645 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1646 | &exception); | |
1647 | } while (exception.retry); | |
1648 | return err; | |
1649 | } | |
1650 | ||
1651 | static int _nfs4_proc_read(struct nfs_read_data *rdata) | |
1652 | { | |
1653 | int flags = rdata->flags; | |
1654 | struct inode *inode = rdata->inode; | |
1655 | struct nfs_fattr *fattr = rdata->res.fattr; | |
1656 | struct nfs_server *server = NFS_SERVER(inode); | |
1657 | struct rpc_message msg = { | |
1658 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
1659 | .rpc_argp = &rdata->args, | |
1660 | .rpc_resp = &rdata->res, | |
1661 | .rpc_cred = rdata->cred, | |
1662 | }; | |
1663 | unsigned long timestamp = jiffies; | |
1664 | int status; | |
1665 | ||
1666 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
1667 | (long long) rdata->args.offset); | |
1668 | ||
0e574af1 | 1669 | nfs_fattr_init(fattr); |
1da177e4 LT |
1670 | status = rpc_call_sync(server->client, &msg, flags); |
1671 | if (!status) | |
1672 | renew_lease(server, timestamp); | |
1673 | dprintk("NFS reply read: %d\n", status); | |
1674 | return status; | |
1675 | } | |
1676 | ||
1677 | static int nfs4_proc_read(struct nfs_read_data *rdata) | |
1678 | { | |
1679 | struct nfs4_exception exception = { }; | |
1680 | int err; | |
1681 | do { | |
1682 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), | |
1683 | _nfs4_proc_read(rdata), | |
1684 | &exception); | |
1685 | } while (exception.retry); | |
1686 | return err; | |
1687 | } | |
1688 | ||
1689 | static int _nfs4_proc_write(struct nfs_write_data *wdata) | |
1690 | { | |
1691 | int rpcflags = wdata->flags; | |
1692 | struct inode *inode = wdata->inode; | |
1693 | struct nfs_fattr *fattr = wdata->res.fattr; | |
1694 | struct nfs_server *server = NFS_SERVER(inode); | |
1695 | struct rpc_message msg = { | |
1696 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
1697 | .rpc_argp = &wdata->args, | |
1698 | .rpc_resp = &wdata->res, | |
1699 | .rpc_cred = wdata->cred, | |
1700 | }; | |
1701 | int status; | |
1702 | ||
1703 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
1704 | (long long) wdata->args.offset); | |
1705 | ||
3b6efee9 TM |
1706 | wdata->args.bitmask = server->attr_bitmask; |
1707 | wdata->res.server = server; | |
26e976a8 | 1708 | wdata->timestamp = jiffies; |
0e574af1 | 1709 | nfs_fattr_init(fattr); |
1da177e4 LT |
1710 | status = rpc_call_sync(server->client, &msg, rpcflags); |
1711 | dprintk("NFS reply write: %d\n", status); | |
3b6efee9 TM |
1712 | if (status < 0) |
1713 | return status; | |
26e976a8 | 1714 | renew_lease(server, wdata->timestamp); |
3b6efee9 TM |
1715 | nfs_post_op_update_inode(inode, fattr); |
1716 | return wdata->res.count; | |
1da177e4 LT |
1717 | } |
1718 | ||
1719 | static int nfs4_proc_write(struct nfs_write_data *wdata) | |
1720 | { | |
1721 | struct nfs4_exception exception = { }; | |
1722 | int err; | |
1723 | do { | |
1724 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), | |
1725 | _nfs4_proc_write(wdata), | |
1726 | &exception); | |
1727 | } while (exception.retry); | |
1728 | return err; | |
1729 | } | |
1730 | ||
1731 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) | |
1732 | { | |
1733 | struct inode *inode = cdata->inode; | |
1734 | struct nfs_fattr *fattr = cdata->res.fattr; | |
1735 | struct nfs_server *server = NFS_SERVER(inode); | |
1736 | struct rpc_message msg = { | |
1737 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
1738 | .rpc_argp = &cdata->args, | |
1739 | .rpc_resp = &cdata->res, | |
1740 | .rpc_cred = cdata->cred, | |
1741 | }; | |
1742 | int status; | |
1743 | ||
1744 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
1745 | (long long) cdata->args.offset); | |
1746 | ||
3b6efee9 TM |
1747 | cdata->args.bitmask = server->attr_bitmask; |
1748 | cdata->res.server = server; | |
26e976a8 | 1749 | cdata->timestamp = jiffies; |
0e574af1 | 1750 | nfs_fattr_init(fattr); |
1da177e4 | 1751 | status = rpc_call_sync(server->client, &msg, 0); |
26e976a8 TM |
1752 | if (status >= 0) |
1753 | renew_lease(server, cdata->timestamp); | |
1da177e4 | 1754 | dprintk("NFS reply commit: %d\n", status); |
3b6efee9 TM |
1755 | if (status >= 0) |
1756 | nfs_post_op_update_inode(inode, fattr); | |
1da177e4 LT |
1757 | return status; |
1758 | } | |
1759 | ||
1760 | static int nfs4_proc_commit(struct nfs_write_data *cdata) | |
1761 | { | |
1762 | struct nfs4_exception exception = { }; | |
1763 | int err; | |
1764 | do { | |
1765 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), | |
1766 | _nfs4_proc_commit(cdata), | |
1767 | &exception); | |
1768 | } while (exception.retry); | |
1769 | return err; | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Got race? | |
1774 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1775 | * Until then, this create/open method is prone to inefficiency and race | |
1776 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1777 | * placed on the wire. | |
1778 | * | |
1779 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1780 | * The file will be opened again in the subsequent VFS open call | |
1781 | * (nfs4_proc_file_open). | |
1782 | * | |
1783 | * The open for read will just hang around to be used by any process that | |
1784 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1785 | */ | |
1786 | ||
1787 | static int | |
1788 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 1789 | int flags, struct nameidata *nd) |
1da177e4 LT |
1790 | { |
1791 | struct nfs4_state *state; | |
1792 | struct rpc_cred *cred; | |
1793 | int status = 0; | |
1794 | ||
1795 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1796 | if (IS_ERR(cred)) { | |
1797 | status = PTR_ERR(cred); | |
1798 | goto out; | |
1799 | } | |
1800 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); | |
1801 | put_rpccred(cred); | |
1802 | if (IS_ERR(state)) { | |
1803 | status = PTR_ERR(state); | |
1804 | goto out; | |
1805 | } | |
24ac23ab | 1806 | d_instantiate(dentry, igrab(state->inode)); |
1da177e4 LT |
1807 | if (flags & O_EXCL) { |
1808 | struct nfs_fattr fattr; | |
1809 | status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, | |
1810 | NFS_FH(state->inode), sattr, state); | |
02a913a7 | 1811 | if (status == 0) |
65e4308d | 1812 | nfs_setattr_update_inode(state->inode, sattr); |
02a913a7 TM |
1813 | } |
1814 | if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN)) | |
1815 | nfs4_intent_set_file(nd, dentry, state); | |
1816 | else | |
1817 | nfs4_close_state(state, flags); | |
1da177e4 LT |
1818 | out: |
1819 | return status; | |
1820 | } | |
1821 | ||
1822 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1823 | { | |
16e42959 | 1824 | struct nfs_server *server = NFS_SERVER(dir); |
1da177e4 LT |
1825 | struct nfs4_remove_arg args = { |
1826 | .fh = NFS_FH(dir), | |
1827 | .name = name, | |
16e42959 TM |
1828 | .bitmask = server->attr_bitmask, |
1829 | }; | |
1830 | struct nfs_fattr dir_attr; | |
1831 | struct nfs4_remove_res res = { | |
1832 | .server = server, | |
1833 | .dir_attr = &dir_attr, | |
1da177e4 | 1834 | }; |
1da177e4 LT |
1835 | struct rpc_message msg = { |
1836 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1837 | .rpc_argp = &args, | |
1838 | .rpc_resp = &res, | |
1839 | }; | |
1840 | int status; | |
1841 | ||
16e42959 TM |
1842 | nfs_fattr_init(res.dir_attr); |
1843 | status = rpc_call_sync(server->client, &msg, 0); | |
1844 | if (status == 0) { | |
1845 | update_changeattr(dir, &res.cinfo); | |
1846 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1847 | } | |
1da177e4 LT |
1848 | return status; |
1849 | } | |
1850 | ||
1851 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1852 | { | |
1853 | struct nfs4_exception exception = { }; | |
1854 | int err; | |
1855 | do { | |
1856 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1857 | _nfs4_proc_remove(dir, name), | |
1858 | &exception); | |
1859 | } while (exception.retry); | |
1860 | return err; | |
1861 | } | |
1862 | ||
1863 | struct unlink_desc { | |
1864 | struct nfs4_remove_arg args; | |
16e42959 TM |
1865 | struct nfs4_remove_res res; |
1866 | struct nfs_fattr dir_attr; | |
1da177e4 LT |
1867 | }; |
1868 | ||
1869 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1870 | struct qstr *name) | |
1871 | { | |
16e42959 | 1872 | struct nfs_server *server = NFS_SERVER(dir->d_inode); |
1da177e4 LT |
1873 | struct unlink_desc *up; |
1874 | ||
1875 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); | |
1876 | if (!up) | |
1877 | return -ENOMEM; | |
1878 | ||
1879 | up->args.fh = NFS_FH(dir->d_inode); | |
1880 | up->args.name = name; | |
16e42959 TM |
1881 | up->args.bitmask = server->attr_bitmask; |
1882 | up->res.server = server; | |
1883 | up->res.dir_attr = &up->dir_attr; | |
1da177e4 LT |
1884 | |
1885 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1886 | msg->rpc_argp = &up->args; | |
1887 | msg->rpc_resp = &up->res; | |
1888 | return 0; | |
1889 | } | |
1890 | ||
1891 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1892 | { | |
1893 | struct rpc_message *msg = &task->tk_msg; | |
1894 | struct unlink_desc *up; | |
1895 | ||
1896 | if (msg->rpc_resp != NULL) { | |
1897 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
16e42959 TM |
1898 | update_changeattr(dir->d_inode, &up->res.cinfo); |
1899 | nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr); | |
1da177e4 LT |
1900 | kfree(up); |
1901 | msg->rpc_resp = NULL; | |
1902 | msg->rpc_argp = NULL; | |
1903 | } | |
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1908 | struct inode *new_dir, struct qstr *new_name) | |
1909 | { | |
6caf2c82 | 1910 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
1911 | struct nfs4_rename_arg arg = { |
1912 | .old_dir = NFS_FH(old_dir), | |
1913 | .new_dir = NFS_FH(new_dir), | |
1914 | .old_name = old_name, | |
1915 | .new_name = new_name, | |
6caf2c82 TM |
1916 | .bitmask = server->attr_bitmask, |
1917 | }; | |
1918 | struct nfs_fattr old_fattr, new_fattr; | |
1919 | struct nfs4_rename_res res = { | |
1920 | .server = server, | |
1921 | .old_fattr = &old_fattr, | |
1922 | .new_fattr = &new_fattr, | |
1da177e4 | 1923 | }; |
1da177e4 LT |
1924 | struct rpc_message msg = { |
1925 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1926 | .rpc_argp = &arg, | |
1927 | .rpc_resp = &res, | |
1928 | }; | |
1929 | int status; | |
1930 | ||
6caf2c82 TM |
1931 | nfs_fattr_init(res.old_fattr); |
1932 | nfs_fattr_init(res.new_fattr); | |
1933 | status = rpc_call_sync(server->client, &msg, 0); | |
1da177e4 LT |
1934 | |
1935 | if (!status) { | |
1936 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 1937 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 1938 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 1939 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
1940 | } |
1941 | return status; | |
1942 | } | |
1943 | ||
1944 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1945 | struct inode *new_dir, struct qstr *new_name) | |
1946 | { | |
1947 | struct nfs4_exception exception = { }; | |
1948 | int err; | |
1949 | do { | |
1950 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1951 | _nfs4_proc_rename(old_dir, old_name, | |
1952 | new_dir, new_name), | |
1953 | &exception); | |
1954 | } while (exception.retry); | |
1955 | return err; | |
1956 | } | |
1957 | ||
1958 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1959 | { | |
91ba2eee | 1960 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1961 | struct nfs4_link_arg arg = { |
1962 | .fh = NFS_FH(inode), | |
1963 | .dir_fh = NFS_FH(dir), | |
1964 | .name = name, | |
91ba2eee TM |
1965 | .bitmask = server->attr_bitmask, |
1966 | }; | |
1967 | struct nfs_fattr fattr, dir_attr; | |
1968 | struct nfs4_link_res res = { | |
1969 | .server = server, | |
1970 | .fattr = &fattr, | |
1971 | .dir_attr = &dir_attr, | |
1da177e4 | 1972 | }; |
1da177e4 LT |
1973 | struct rpc_message msg = { |
1974 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1975 | .rpc_argp = &arg, | |
91ba2eee | 1976 | .rpc_resp = &res, |
1da177e4 LT |
1977 | }; |
1978 | int status; | |
1979 | ||
91ba2eee TM |
1980 | nfs_fattr_init(res.fattr); |
1981 | nfs_fattr_init(res.dir_attr); | |
1982 | status = rpc_call_sync(server->client, &msg, 0); | |
1983 | if (!status) { | |
1984 | update_changeattr(dir, &res.cinfo); | |
1985 | nfs_post_op_update_inode(dir, res.dir_attr); | |
1986 | nfs_refresh_inode(inode, res.fattr); | |
1987 | } | |
1da177e4 LT |
1988 | |
1989 | return status; | |
1990 | } | |
1991 | ||
1992 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1993 | { | |
1994 | struct nfs4_exception exception = { }; | |
1995 | int err; | |
1996 | do { | |
1997 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1998 | _nfs4_proc_link(inode, dir, name), | |
1999 | &exception); | |
2000 | } while (exception.retry); | |
2001 | return err; | |
2002 | } | |
2003 | ||
2004 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
2005 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
2006 | struct nfs_fattr *fattr) | |
2007 | { | |
2008 | struct nfs_server *server = NFS_SERVER(dir); | |
56ae19f3 | 2009 | struct nfs_fattr dir_fattr; |
1da177e4 LT |
2010 | struct nfs4_create_arg arg = { |
2011 | .dir_fh = NFS_FH(dir), | |
2012 | .server = server, | |
2013 | .name = name, | |
2014 | .attrs = sattr, | |
2015 | .ftype = NF4LNK, | |
2016 | .bitmask = server->attr_bitmask, | |
2017 | }; | |
2018 | struct nfs4_create_res res = { | |
2019 | .server = server, | |
2020 | .fh = fhandle, | |
2021 | .fattr = fattr, | |
56ae19f3 | 2022 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2023 | }; |
2024 | struct rpc_message msg = { | |
2025 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
2026 | .rpc_argp = &arg, | |
2027 | .rpc_resp = &res, | |
2028 | }; | |
2029 | int status; | |
2030 | ||
2031 | if (path->len > NFS4_MAXPATHLEN) | |
2032 | return -ENAMETOOLONG; | |
2033 | arg.u.symlink = path; | |
0e574af1 | 2034 | nfs_fattr_init(fattr); |
56ae19f3 | 2035 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2036 | |
2037 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2038 | if (!status) | |
2039 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2040 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2041 | return status; |
2042 | } | |
2043 | ||
2044 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
2045 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
2046 | struct nfs_fattr *fattr) | |
2047 | { | |
2048 | struct nfs4_exception exception = { }; | |
2049 | int err; | |
2050 | do { | |
2051 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2052 | _nfs4_proc_symlink(dir, name, path, sattr, | |
2053 | fhandle, fattr), | |
2054 | &exception); | |
2055 | } while (exception.retry); | |
2056 | return err; | |
2057 | } | |
2058 | ||
2059 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2060 | struct iattr *sattr) | |
2061 | { | |
2062 | struct nfs_server *server = NFS_SERVER(dir); | |
2063 | struct nfs_fh fhandle; | |
56ae19f3 | 2064 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2065 | struct nfs4_create_arg arg = { |
2066 | .dir_fh = NFS_FH(dir), | |
2067 | .server = server, | |
2068 | .name = &dentry->d_name, | |
2069 | .attrs = sattr, | |
2070 | .ftype = NF4DIR, | |
2071 | .bitmask = server->attr_bitmask, | |
2072 | }; | |
2073 | struct nfs4_create_res res = { | |
2074 | .server = server, | |
2075 | .fh = &fhandle, | |
2076 | .fattr = &fattr, | |
56ae19f3 | 2077 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2078 | }; |
2079 | struct rpc_message msg = { | |
2080 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2081 | .rpc_argp = &arg, | |
2082 | .rpc_resp = &res, | |
2083 | }; | |
2084 | int status; | |
2085 | ||
0e574af1 | 2086 | nfs_fattr_init(&fattr); |
56ae19f3 | 2087 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2088 | |
2089 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2090 | if (!status) { | |
2091 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2092 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2093 | status = nfs_instantiate(dentry, &fhandle, &fattr); |
2094 | } | |
2095 | return status; | |
2096 | } | |
2097 | ||
2098 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2099 | struct iattr *sattr) | |
2100 | { | |
2101 | struct nfs4_exception exception = { }; | |
2102 | int err; | |
2103 | do { | |
2104 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2105 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2106 | &exception); | |
2107 | } while (exception.retry); | |
2108 | return err; | |
2109 | } | |
2110 | ||
2111 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2112 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2113 | { | |
2114 | struct inode *dir = dentry->d_inode; | |
2115 | struct nfs4_readdir_arg args = { | |
2116 | .fh = NFS_FH(dir), | |
2117 | .pages = &page, | |
2118 | .pgbase = 0, | |
2119 | .count = count, | |
2120 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
2121 | }; | |
2122 | struct nfs4_readdir_res res; | |
2123 | struct rpc_message msg = { | |
2124 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2125 | .rpc_argp = &args, | |
2126 | .rpc_resp = &res, | |
2127 | .rpc_cred = cred, | |
2128 | }; | |
2129 | int status; | |
2130 | ||
eadf4598 TM |
2131 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
2132 | dentry->d_parent->d_name.name, | |
2133 | dentry->d_name.name, | |
2134 | (unsigned long long)cookie); | |
1da177e4 LT |
2135 | lock_kernel(); |
2136 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
2137 | res.pgbase = args.pgbase; | |
2138 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2139 | if (status == 0) | |
2140 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
2141 | unlock_kernel(); | |
eadf4598 | 2142 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
2143 | return status; |
2144 | } | |
2145 | ||
2146 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2147 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2148 | { | |
2149 | struct nfs4_exception exception = { }; | |
2150 | int err; | |
2151 | do { | |
2152 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2153 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2154 | page, count, plus), | |
2155 | &exception); | |
2156 | } while (exception.retry); | |
2157 | return err; | |
2158 | } | |
2159 | ||
2160 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2161 | struct iattr *sattr, dev_t rdev) | |
2162 | { | |
2163 | struct nfs_server *server = NFS_SERVER(dir); | |
2164 | struct nfs_fh fh; | |
56ae19f3 | 2165 | struct nfs_fattr fattr, dir_fattr; |
1da177e4 LT |
2166 | struct nfs4_create_arg arg = { |
2167 | .dir_fh = NFS_FH(dir), | |
2168 | .server = server, | |
2169 | .name = &dentry->d_name, | |
2170 | .attrs = sattr, | |
2171 | .bitmask = server->attr_bitmask, | |
2172 | }; | |
2173 | struct nfs4_create_res res = { | |
2174 | .server = server, | |
2175 | .fh = &fh, | |
2176 | .fattr = &fattr, | |
56ae19f3 | 2177 | .dir_fattr = &dir_fattr, |
1da177e4 LT |
2178 | }; |
2179 | struct rpc_message msg = { | |
2180 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
2181 | .rpc_argp = &arg, | |
2182 | .rpc_resp = &res, | |
2183 | }; | |
2184 | int status; | |
2185 | int mode = sattr->ia_mode; | |
2186 | ||
0e574af1 | 2187 | nfs_fattr_init(&fattr); |
56ae19f3 | 2188 | nfs_fattr_init(&dir_fattr); |
1da177e4 LT |
2189 | |
2190 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2191 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2192 | if (S_ISFIFO(mode)) | |
2193 | arg.ftype = NF4FIFO; | |
2194 | else if (S_ISBLK(mode)) { | |
2195 | arg.ftype = NF4BLK; | |
2196 | arg.u.device.specdata1 = MAJOR(rdev); | |
2197 | arg.u.device.specdata2 = MINOR(rdev); | |
2198 | } | |
2199 | else if (S_ISCHR(mode)) { | |
2200 | arg.ftype = NF4CHR; | |
2201 | arg.u.device.specdata1 = MAJOR(rdev); | |
2202 | arg.u.device.specdata2 = MINOR(rdev); | |
2203 | } | |
2204 | else | |
2205 | arg.ftype = NF4SOCK; | |
2206 | ||
2207 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
2208 | if (status == 0) { | |
2209 | update_changeattr(dir, &res.dir_cinfo); | |
56ae19f3 | 2210 | nfs_post_op_update_inode(dir, res.dir_fattr); |
1da177e4 LT |
2211 | status = nfs_instantiate(dentry, &fh, &fattr); |
2212 | } | |
2213 | return status; | |
2214 | } | |
2215 | ||
2216 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2217 | struct iattr *sattr, dev_t rdev) | |
2218 | { | |
2219 | struct nfs4_exception exception = { }; | |
2220 | int err; | |
2221 | do { | |
2222 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2223 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2224 | &exception); | |
2225 | } while (exception.retry); | |
2226 | return err; | |
2227 | } | |
2228 | ||
2229 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2230 | struct nfs_fsstat *fsstat) | |
2231 | { | |
2232 | struct nfs4_statfs_arg args = { | |
2233 | .fh = fhandle, | |
2234 | .bitmask = server->attr_bitmask, | |
2235 | }; | |
2236 | struct rpc_message msg = { | |
2237 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2238 | .rpc_argp = &args, | |
2239 | .rpc_resp = fsstat, | |
2240 | }; | |
2241 | ||
0e574af1 | 2242 | nfs_fattr_init(fsstat->fattr); |
1da177e4 LT |
2243 | return rpc_call_sync(server->client, &msg, 0); |
2244 | } | |
2245 | ||
2246 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2247 | { | |
2248 | struct nfs4_exception exception = { }; | |
2249 | int err; | |
2250 | do { | |
2251 | err = nfs4_handle_exception(server, | |
2252 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2253 | &exception); | |
2254 | } while (exception.retry); | |
2255 | return err; | |
2256 | } | |
2257 | ||
2258 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2259 | struct nfs_fsinfo *fsinfo) | |
2260 | { | |
2261 | struct nfs4_fsinfo_arg args = { | |
2262 | .fh = fhandle, | |
2263 | .bitmask = server->attr_bitmask, | |
2264 | }; | |
2265 | struct rpc_message msg = { | |
2266 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2267 | .rpc_argp = &args, | |
2268 | .rpc_resp = fsinfo, | |
2269 | }; | |
2270 | ||
2271 | return rpc_call_sync(server->client, &msg, 0); | |
2272 | } | |
2273 | ||
2274 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2275 | { | |
2276 | struct nfs4_exception exception = { }; | |
2277 | int err; | |
2278 | ||
2279 | do { | |
2280 | err = nfs4_handle_exception(server, | |
2281 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2282 | &exception); | |
2283 | } while (exception.retry); | |
2284 | return err; | |
2285 | } | |
2286 | ||
2287 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2288 | { | |
0e574af1 | 2289 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2290 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2291 | } | |
2292 | ||
2293 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2294 | struct nfs_pathconf *pathconf) | |
2295 | { | |
2296 | struct nfs4_pathconf_arg args = { | |
2297 | .fh = fhandle, | |
2298 | .bitmask = server->attr_bitmask, | |
2299 | }; | |
2300 | struct rpc_message msg = { | |
2301 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2302 | .rpc_argp = &args, | |
2303 | .rpc_resp = pathconf, | |
2304 | }; | |
2305 | ||
2306 | /* None of the pathconf attributes are mandatory to implement */ | |
2307 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2308 | memset(pathconf, 0, sizeof(*pathconf)); | |
2309 | return 0; | |
2310 | } | |
2311 | ||
0e574af1 | 2312 | nfs_fattr_init(pathconf->fattr); |
1da177e4 LT |
2313 | return rpc_call_sync(server->client, &msg, 0); |
2314 | } | |
2315 | ||
2316 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2317 | struct nfs_pathconf *pathconf) | |
2318 | { | |
2319 | struct nfs4_exception exception = { }; | |
2320 | int err; | |
2321 | ||
2322 | do { | |
2323 | err = nfs4_handle_exception(server, | |
2324 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2325 | &exception); | |
2326 | } while (exception.retry); | |
2327 | return err; | |
2328 | } | |
2329 | ||
963d8fe5 | 2330 | static void nfs4_read_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2331 | { |
963d8fe5 | 2332 | struct nfs_read_data *data = calldata; |
1da177e4 LT |
2333 | struct inode *inode = data->inode; |
2334 | ||
2335 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2336 | rpc_restart_call(task); | |
2337 | return; | |
2338 | } | |
2339 | if (task->tk_status > 0) | |
2340 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2341 | /* Call back common NFS readpage processing */ | |
963d8fe5 | 2342 | nfs_readpage_result(task, calldata); |
1da177e4 LT |
2343 | } |
2344 | ||
963d8fe5 TM |
2345 | static const struct rpc_call_ops nfs4_read_ops = { |
2346 | .rpc_call_done = nfs4_read_done, | |
2347 | .rpc_release = nfs_readdata_release, | |
2348 | }; | |
2349 | ||
1da177e4 LT |
2350 | static void |
2351 | nfs4_proc_read_setup(struct nfs_read_data *data) | |
2352 | { | |
2353 | struct rpc_task *task = &data->task; | |
2354 | struct rpc_message msg = { | |
2355 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2356 | .rpc_argp = &data->args, | |
2357 | .rpc_resp = &data->res, | |
2358 | .rpc_cred = data->cred, | |
2359 | }; | |
2360 | struct inode *inode = data->inode; | |
2361 | int flags; | |
2362 | ||
2363 | data->timestamp = jiffies; | |
2364 | ||
2365 | /* N.B. Do we need to test? Never called for swapfile inode */ | |
2366 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); | |
2367 | ||
2368 | /* Finalize the task. */ | |
963d8fe5 | 2369 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data); |
1da177e4 LT |
2370 | rpc_call_setup(task, &msg, 0); |
2371 | } | |
2372 | ||
963d8fe5 | 2373 | static void nfs4_write_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2374 | { |
963d8fe5 | 2375 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2376 | struct inode *inode = data->inode; |
2377 | ||
2378 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2379 | rpc_restart_call(task); | |
2380 | return; | |
2381 | } | |
4f9838c7 | 2382 | if (task->tk_status >= 0) { |
1da177e4 | 2383 | renew_lease(NFS_SERVER(inode), data->timestamp); |
4f9838c7 TM |
2384 | nfs_post_op_update_inode(inode, data->res.fattr); |
2385 | } | |
1da177e4 | 2386 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2387 | nfs_writeback_done(task, calldata); |
1da177e4 LT |
2388 | } |
2389 | ||
963d8fe5 TM |
2390 | static const struct rpc_call_ops nfs4_write_ops = { |
2391 | .rpc_call_done = nfs4_write_done, | |
2392 | .rpc_release = nfs_writedata_release, | |
2393 | }; | |
2394 | ||
1da177e4 LT |
2395 | static void |
2396 | nfs4_proc_write_setup(struct nfs_write_data *data, int how) | |
2397 | { | |
2398 | struct rpc_task *task = &data->task; | |
2399 | struct rpc_message msg = { | |
2400 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2401 | .rpc_argp = &data->args, | |
2402 | .rpc_resp = &data->res, | |
2403 | .rpc_cred = data->cred, | |
2404 | }; | |
2405 | struct inode *inode = data->inode; | |
4f9838c7 | 2406 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2407 | int stable; |
2408 | int flags; | |
2409 | ||
2410 | if (how & FLUSH_STABLE) { | |
2411 | if (!NFS_I(inode)->ncommit) | |
2412 | stable = NFS_FILE_SYNC; | |
2413 | else | |
2414 | stable = NFS_DATA_SYNC; | |
2415 | } else | |
2416 | stable = NFS_UNSTABLE; | |
2417 | data->args.stable = stable; | |
4f9838c7 TM |
2418 | data->args.bitmask = server->attr_bitmask; |
2419 | data->res.server = server; | |
1da177e4 LT |
2420 | |
2421 | data->timestamp = jiffies; | |
2422 | ||
2423 | /* Set the initial flags for the task. */ | |
2424 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2425 | ||
2426 | /* Finalize the task. */ | |
963d8fe5 | 2427 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data); |
1da177e4 LT |
2428 | rpc_call_setup(task, &msg, 0); |
2429 | } | |
2430 | ||
963d8fe5 | 2431 | static void nfs4_commit_done(struct rpc_task *task, void *calldata) |
1da177e4 | 2432 | { |
963d8fe5 | 2433 | struct nfs_write_data *data = calldata; |
1da177e4 LT |
2434 | struct inode *inode = data->inode; |
2435 | ||
2436 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2437 | rpc_restart_call(task); | |
2438 | return; | |
2439 | } | |
4f9838c7 TM |
2440 | if (task->tk_status >= 0) |
2441 | nfs_post_op_update_inode(inode, data->res.fattr); | |
1da177e4 | 2442 | /* Call back common NFS writeback processing */ |
963d8fe5 | 2443 | nfs_commit_done(task, calldata); |
1da177e4 LT |
2444 | } |
2445 | ||
963d8fe5 TM |
2446 | static const struct rpc_call_ops nfs4_commit_ops = { |
2447 | .rpc_call_done = nfs4_commit_done, | |
2448 | .rpc_release = nfs_commit_release, | |
2449 | }; | |
2450 | ||
1da177e4 LT |
2451 | static void |
2452 | nfs4_proc_commit_setup(struct nfs_write_data *data, int how) | |
2453 | { | |
2454 | struct rpc_task *task = &data->task; | |
2455 | struct rpc_message msg = { | |
2456 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2457 | .rpc_argp = &data->args, | |
2458 | .rpc_resp = &data->res, | |
2459 | .rpc_cred = data->cred, | |
2460 | }; | |
2461 | struct inode *inode = data->inode; | |
4f9838c7 | 2462 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2463 | int flags; |
2464 | ||
4f9838c7 TM |
2465 | data->args.bitmask = server->attr_bitmask; |
2466 | data->res.server = server; | |
2467 | ||
1da177e4 LT |
2468 | /* Set the initial flags for the task. */ |
2469 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2470 | ||
2471 | /* Finalize the task. */ | |
963d8fe5 | 2472 | rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data); |
1da177e4 LT |
2473 | rpc_call_setup(task, &msg, 0); |
2474 | } | |
2475 | ||
2476 | /* | |
2477 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2478 | * standalone procedure for queueing an asynchronous RENEW. | |
2479 | */ | |
963d8fe5 | 2480 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 LT |
2481 | { |
2482 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; | |
963d8fe5 | 2483 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2484 | |
2485 | if (task->tk_status < 0) { | |
2486 | switch (task->tk_status) { | |
2487 | case -NFS4ERR_STALE_CLIENTID: | |
2488 | case -NFS4ERR_EXPIRED: | |
2489 | case -NFS4ERR_CB_PATH_DOWN: | |
2490 | nfs4_schedule_state_recovery(clp); | |
2491 | } | |
2492 | return; | |
2493 | } | |
2494 | spin_lock(&clp->cl_lock); | |
2495 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2496 | clp->cl_last_renewal = timestamp; | |
2497 | spin_unlock(&clp->cl_lock); | |
2498 | } | |
2499 | ||
963d8fe5 TM |
2500 | static const struct rpc_call_ops nfs4_renew_ops = { |
2501 | .rpc_call_done = nfs4_renew_done, | |
2502 | }; | |
2503 | ||
1da177e4 LT |
2504 | int |
2505 | nfs4_proc_async_renew(struct nfs4_client *clp) | |
2506 | { | |
2507 | struct rpc_message msg = { | |
2508 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2509 | .rpc_argp = clp, | |
2510 | .rpc_cred = clp->cl_cred, | |
2511 | }; | |
2512 | ||
2513 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2514 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2515 | } |
2516 | ||
2517 | int | |
2518 | nfs4_proc_renew(struct nfs4_client *clp) | |
2519 | { | |
2520 | struct rpc_message msg = { | |
2521 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2522 | .rpc_argp = clp, | |
2523 | .rpc_cred = clp->cl_cred, | |
2524 | }; | |
2525 | unsigned long now = jiffies; | |
2526 | int status; | |
2527 | ||
2528 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2529 | if (status < 0) | |
2530 | return status; | |
2531 | spin_lock(&clp->cl_lock); | |
2532 | if (time_before(clp->cl_last_renewal,now)) | |
2533 | clp->cl_last_renewal = now; | |
2534 | spin_unlock(&clp->cl_lock); | |
2535 | return 0; | |
2536 | } | |
2537 | ||
aa1870af BF |
2538 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2539 | { | |
2540 | return (server->caps & NFS_CAP_ACLS) | |
2541 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2542 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2543 | } | |
2544 | ||
2545 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2546 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2547 | * the stack. | |
2548 | */ | |
2549 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2550 | ||
2551 | static void buf_to_pages(const void *buf, size_t buflen, | |
2552 | struct page **pages, unsigned int *pgbase) | |
2553 | { | |
2554 | const void *p = buf; | |
2555 | ||
2556 | *pgbase = offset_in_page(buf); | |
2557 | p -= *pgbase; | |
2558 | while (p < buf + buflen) { | |
2559 | *(pages++) = virt_to_page(p); | |
2560 | p += PAGE_CACHE_SIZE; | |
2561 | } | |
2562 | } | |
2563 | ||
e50a1c2e BF |
2564 | struct nfs4_cached_acl { |
2565 | int cached; | |
2566 | size_t len; | |
3e9d4154 | 2567 | char data[0]; |
e50a1c2e BF |
2568 | }; |
2569 | ||
2570 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2571 | { | |
2572 | struct nfs_inode *nfsi = NFS_I(inode); | |
2573 | ||
2574 | spin_lock(&inode->i_lock); | |
2575 | kfree(nfsi->nfs4_acl); | |
2576 | nfsi->nfs4_acl = acl; | |
2577 | spin_unlock(&inode->i_lock); | |
2578 | } | |
2579 | ||
2580 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2581 | { | |
2582 | nfs4_set_cached_acl(inode, NULL); | |
2583 | } | |
2584 | ||
2585 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2586 | { | |
2587 | struct nfs_inode *nfsi = NFS_I(inode); | |
2588 | struct nfs4_cached_acl *acl; | |
2589 | int ret = -ENOENT; | |
2590 | ||
2591 | spin_lock(&inode->i_lock); | |
2592 | acl = nfsi->nfs4_acl; | |
2593 | if (acl == NULL) | |
2594 | goto out; | |
2595 | if (buf == NULL) /* user is just asking for length */ | |
2596 | goto out_len; | |
2597 | if (acl->cached == 0) | |
2598 | goto out; | |
2599 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2600 | if (acl->len > buflen) | |
2601 | goto out; | |
2602 | memcpy(buf, acl->data, acl->len); | |
2603 | out_len: | |
2604 | ret = acl->len; | |
2605 | out: | |
2606 | spin_unlock(&inode->i_lock); | |
2607 | return ret; | |
2608 | } | |
2609 | ||
2610 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2611 | { | |
2612 | struct nfs4_cached_acl *acl; | |
2613 | ||
2614 | if (buf && acl_len <= PAGE_SIZE) { | |
2615 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2616 | if (acl == NULL) | |
2617 | goto out; | |
2618 | acl->cached = 1; | |
2619 | memcpy(acl->data, buf, acl_len); | |
2620 | } else { | |
2621 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2622 | if (acl == NULL) | |
2623 | goto out; | |
2624 | acl->cached = 0; | |
2625 | } | |
2626 | acl->len = acl_len; | |
2627 | out: | |
2628 | nfs4_set_cached_acl(inode, acl); | |
2629 | } | |
2630 | ||
2631 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
aa1870af | 2632 | { |
aa1870af BF |
2633 | struct page *pages[NFS4ACL_MAXPAGES]; |
2634 | struct nfs_getaclargs args = { | |
2635 | .fh = NFS_FH(inode), | |
2636 | .acl_pages = pages, | |
2637 | .acl_len = buflen, | |
2638 | }; | |
2639 | size_t resp_len = buflen; | |
e50a1c2e | 2640 | void *resp_buf; |
aa1870af BF |
2641 | struct rpc_message msg = { |
2642 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2643 | .rpc_argp = &args, | |
2644 | .rpc_resp = &resp_len, | |
2645 | }; | |
e50a1c2e | 2646 | struct page *localpage = NULL; |
aa1870af BF |
2647 | int ret; |
2648 | ||
e50a1c2e BF |
2649 | if (buflen < PAGE_SIZE) { |
2650 | /* As long as we're doing a round trip to the server anyway, | |
2651 | * let's be prepared for a page of acl data. */ | |
2652 | localpage = alloc_page(GFP_KERNEL); | |
2653 | resp_buf = page_address(localpage); | |
2654 | if (localpage == NULL) | |
2655 | return -ENOMEM; | |
2656 | args.acl_pages[0] = localpage; | |
2657 | args.acl_pgbase = 0; | |
1d95db8e | 2658 | resp_len = args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2659 | } else { |
2660 | resp_buf = buf; | |
2661 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2662 | } | |
aa1870af | 2663 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2664 | if (ret) |
2665 | goto out_free; | |
2666 | if (resp_len > args.acl_len) | |
2667 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2668 | else | |
2669 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2670 | if (buf) { | |
2671 | ret = -ERANGE; | |
2672 | if (resp_len > buflen) | |
2673 | goto out_free; | |
2674 | if (localpage) | |
2675 | memcpy(buf, resp_buf, resp_len); | |
2676 | } | |
2677 | ret = resp_len; | |
2678 | out_free: | |
2679 | if (localpage) | |
2680 | __free_page(localpage); | |
aa1870af BF |
2681 | return ret; |
2682 | } | |
2683 | ||
e50a1c2e BF |
2684 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2685 | { | |
2686 | struct nfs_server *server = NFS_SERVER(inode); | |
2687 | int ret; | |
2688 | ||
2689 | if (!nfs4_server_supports_acls(server)) | |
2690 | return -EOPNOTSUPP; | |
2691 | ret = nfs_revalidate_inode(server, inode); | |
2692 | if (ret < 0) | |
2693 | return ret; | |
2694 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2695 | if (ret != -ENOENT) | |
2696 | return ret; | |
2697 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2698 | } | |
2699 | ||
4b580ee3 BF |
2700 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2701 | { | |
2702 | struct nfs_server *server = NFS_SERVER(inode); | |
2703 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2704 | struct nfs_setaclargs arg = { | |
2705 | .fh = NFS_FH(inode), | |
2706 | .acl_pages = pages, | |
2707 | .acl_len = buflen, | |
2708 | }; | |
2709 | struct rpc_message msg = { | |
2710 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2711 | .rpc_argp = &arg, | |
2712 | .rpc_resp = NULL, | |
2713 | }; | |
2714 | int ret; | |
2715 | ||
2716 | if (!nfs4_server_supports_acls(server)) | |
2717 | return -EOPNOTSUPP; | |
642ac549 | 2718 | nfs_inode_return_delegation(inode); |
4b580ee3 BF |
2719 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
2720 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); | |
e50a1c2e BF |
2721 | if (ret == 0) |
2722 | nfs4_write_cached_acl(inode, buf, buflen); | |
4b580ee3 BF |
2723 | return ret; |
2724 | } | |
2725 | ||
1da177e4 | 2726 | static int |
faf5f49c | 2727 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 LT |
2728 | { |
2729 | struct nfs4_client *clp = server->nfs4_state; | |
2730 | ||
2731 | if (!clp || task->tk_status >= 0) | |
2732 | return 0; | |
2733 | switch(task->tk_status) { | |
2734 | case -NFS4ERR_STALE_CLIENTID: | |
2735 | case -NFS4ERR_STALE_STATEID: | |
2736 | case -NFS4ERR_EXPIRED: | |
2737 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2738 | nfs4_schedule_state_recovery(clp); | |
433fbe4c | 2739 | if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0) |
1da177e4 LT |
2740 | rpc_wake_up_task(task); |
2741 | task->tk_status = 0; | |
2742 | return -EAGAIN; | |
2743 | case -NFS4ERR_GRACE: | |
2744 | case -NFS4ERR_DELAY: | |
2745 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
2746 | task->tk_status = 0; | |
2747 | return -EAGAIN; | |
2748 | case -NFS4ERR_OLD_STATEID: | |
2749 | task->tk_status = 0; | |
2750 | return -EAGAIN; | |
2751 | } | |
2752 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2753 | return 0; | |
2754 | } | |
2755 | ||
433fbe4c TM |
2756 | static int nfs4_wait_bit_interruptible(void *word) |
2757 | { | |
2758 | if (signal_pending(current)) | |
2759 | return -ERESTARTSYS; | |
2760 | schedule(); | |
2761 | return 0; | |
2762 | } | |
2763 | ||
1da177e4 LT |
2764 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) |
2765 | { | |
1da177e4 | 2766 | sigset_t oldset; |
433fbe4c | 2767 | int res; |
1da177e4 LT |
2768 | |
2769 | might_sleep(); | |
2770 | ||
2771 | rpc_clnt_sigmask(clnt, &oldset); | |
433fbe4c TM |
2772 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER, |
2773 | nfs4_wait_bit_interruptible, | |
2774 | TASK_INTERRUPTIBLE); | |
1da177e4 LT |
2775 | rpc_clnt_sigunmask(clnt, &oldset); |
2776 | return res; | |
2777 | } | |
2778 | ||
2779 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2780 | { | |
2781 | sigset_t oldset; | |
2782 | int res = 0; | |
2783 | ||
2784 | might_sleep(); | |
2785 | ||
2786 | if (*timeout <= 0) | |
2787 | *timeout = NFS4_POLL_RETRY_MIN; | |
2788 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2789 | *timeout = NFS4_POLL_RETRY_MAX; | |
2790 | rpc_clnt_sigmask(clnt, &oldset); | |
2791 | if (clnt->cl_intr) { | |
041e0e3b | 2792 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2793 | if (signalled()) |
2794 | res = -ERESTARTSYS; | |
041e0e3b NA |
2795 | } else |
2796 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2797 | rpc_clnt_sigunmask(clnt, &oldset); |
2798 | *timeout <<= 1; | |
2799 | return res; | |
2800 | } | |
2801 | ||
2802 | /* This is the error handling routine for processes that are allowed | |
2803 | * to sleep. | |
2804 | */ | |
faf5f49c | 2805 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 LT |
2806 | { |
2807 | struct nfs4_client *clp = server->nfs4_state; | |
2808 | int ret = errorcode; | |
2809 | ||
2810 | exception->retry = 0; | |
2811 | switch(errorcode) { | |
2812 | case 0: | |
2813 | return 0; | |
2814 | case -NFS4ERR_STALE_CLIENTID: | |
2815 | case -NFS4ERR_STALE_STATEID: | |
2816 | case -NFS4ERR_EXPIRED: | |
433fbe4c | 2817 | nfs4_schedule_state_recovery(clp); |
1da177e4 LT |
2818 | ret = nfs4_wait_clnt_recover(server->client, clp); |
2819 | if (ret == 0) | |
2820 | exception->retry = 1; | |
2821 | break; | |
2822 | case -NFS4ERR_GRACE: | |
2823 | case -NFS4ERR_DELAY: | |
2824 | ret = nfs4_delay(server->client, &exception->timeout); | |
2c56617d TM |
2825 | if (ret != 0) |
2826 | break; | |
1da177e4 | 2827 | case -NFS4ERR_OLD_STATEID: |
2c56617d | 2828 | exception->retry = 1; |
1da177e4 LT |
2829 | } |
2830 | /* We failed to handle the error */ | |
2831 | return nfs4_map_errors(ret); | |
2832 | } | |
2833 | ||
2834 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) | |
2835 | { | |
2836 | nfs4_verifier sc_verifier; | |
2837 | struct nfs4_setclientid setclientid = { | |
2838 | .sc_verifier = &sc_verifier, | |
2839 | .sc_prog = program, | |
2840 | }; | |
2841 | struct rpc_message msg = { | |
2842 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2843 | .rpc_argp = &setclientid, | |
2844 | .rpc_resp = clp, | |
2845 | .rpc_cred = clp->cl_cred, | |
2846 | }; | |
2847 | u32 *p; | |
2848 | int loop = 0; | |
2849 | int status; | |
2850 | ||
2851 | p = (u32*)sc_verifier.data; | |
2852 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
2853 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2854 | ||
2855 | for(;;) { | |
2856 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2857 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
2858 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), | |
2859 | clp->cl_cred->cr_ops->cr_name, | |
2860 | clp->cl_id_uniquifier); | |
2861 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2862 | sizeof(setclientid.sc_netid), "tcp"); | |
2863 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2864 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2865 | clp->cl_ipaddr, port >> 8, port & 255); | |
2866 | ||
2867 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2868 | if (status != -NFS4ERR_CLID_INUSE) | |
2869 | break; | |
2870 | if (signalled()) | |
2871 | break; | |
2872 | if (loop++ & 1) | |
2873 | ssleep(clp->cl_lease_time + 1); | |
2874 | else | |
2875 | if (++clp->cl_id_uniquifier == 0) | |
2876 | break; | |
2877 | } | |
2878 | return status; | |
2879 | } | |
2880 | ||
2881 | int | |
2882 | nfs4_proc_setclientid_confirm(struct nfs4_client *clp) | |
2883 | { | |
2884 | struct nfs_fsinfo fsinfo; | |
2885 | struct rpc_message msg = { | |
2886 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2887 | .rpc_argp = clp, | |
2888 | .rpc_resp = &fsinfo, | |
2889 | .rpc_cred = clp->cl_cred, | |
2890 | }; | |
2891 | unsigned long now; | |
2892 | int status; | |
2893 | ||
2894 | now = jiffies; | |
2895 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2896 | if (status == 0) { | |
2897 | spin_lock(&clp->cl_lock); | |
2898 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2899 | clp->cl_last_renewal = now; | |
2900 | spin_unlock(&clp->cl_lock); | |
2901 | } | |
2902 | return status; | |
2903 | } | |
2904 | ||
fe650407 TM |
2905 | struct nfs4_delegreturndata { |
2906 | struct nfs4_delegreturnargs args; | |
2907 | struct nfs_fh fh; | |
2908 | nfs4_stateid stateid; | |
2909 | struct rpc_cred *cred; | |
26e976a8 TM |
2910 | unsigned long timestamp; |
2911 | const struct nfs_server *server; | |
fe650407 TM |
2912 | int rpc_status; |
2913 | }; | |
2914 | ||
2915 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) | |
1da177e4 | 2916 | { |
fe650407 | 2917 | struct nfs4_delegreturndata *data = calldata; |
1da177e4 LT |
2918 | struct rpc_message msg = { |
2919 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
fe650407 TM |
2920 | .rpc_argp = &data->args, |
2921 | .rpc_cred = data->cred, | |
1da177e4 | 2922 | }; |
fe650407 TM |
2923 | rpc_call_setup(task, &msg, 0); |
2924 | } | |
1da177e4 | 2925 | |
fe650407 TM |
2926 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
2927 | { | |
2928 | struct nfs4_delegreturndata *data = calldata; | |
2929 | data->rpc_status = task->tk_status; | |
26e976a8 TM |
2930 | if (data->rpc_status == 0) |
2931 | renew_lease(data->server, data->timestamp); | |
fe650407 TM |
2932 | } |
2933 | ||
2934 | static void nfs4_delegreturn_release(void *calldata) | |
2935 | { | |
2936 | struct nfs4_delegreturndata *data = calldata; | |
2937 | ||
2938 | put_rpccred(data->cred); | |
2939 | kfree(calldata); | |
2940 | } | |
2941 | ||
2942 | const static struct rpc_call_ops nfs4_delegreturn_ops = { | |
2943 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
2944 | .rpc_call_done = nfs4_delegreturn_done, | |
2945 | .rpc_release = nfs4_delegreturn_release, | |
2946 | }; | |
2947 | ||
2948 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2949 | { | |
2950 | struct nfs4_delegreturndata *data; | |
2951 | struct rpc_task *task; | |
2952 | int status; | |
2953 | ||
2954 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
2955 | if (data == NULL) | |
2956 | return -ENOMEM; | |
2957 | data->args.fhandle = &data->fh; | |
2958 | data->args.stateid = &data->stateid; | |
2959 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
2960 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
2961 | data->cred = get_rpccred(cred); | |
26e976a8 TM |
2962 | data->timestamp = jiffies; |
2963 | data->server = NFS_SERVER(inode); | |
fe650407 TM |
2964 | data->rpc_status = 0; |
2965 | ||
2966 | task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data); | |
2967 | if (IS_ERR(task)) { | |
2968 | nfs4_delegreturn_release(data); | |
2969 | return PTR_ERR(task); | |
2970 | } | |
2971 | status = nfs4_wait_for_completion_rpc_task(task); | |
2972 | if (status == 0) | |
2973 | status = data->rpc_status; | |
2974 | rpc_release_task(task); | |
2975 | return status; | |
1da177e4 LT |
2976 | } |
2977 | ||
2978 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2979 | { | |
2980 | struct nfs_server *server = NFS_SERVER(inode); | |
2981 | struct nfs4_exception exception = { }; | |
2982 | int err; | |
2983 | do { | |
2984 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2985 | switch (err) { | |
2986 | case -NFS4ERR_STALE_STATEID: | |
2987 | case -NFS4ERR_EXPIRED: | |
2988 | nfs4_schedule_state_recovery(server->nfs4_state); | |
2989 | case 0: | |
2990 | return 0; | |
2991 | } | |
2992 | err = nfs4_handle_exception(server, err, &exception); | |
2993 | } while (exception.retry); | |
2994 | return err; | |
2995 | } | |
2996 | ||
2997 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2998 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2999 | ||
3000 | /* | |
3001 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3002 | */ | |
3003 | static unsigned long | |
3004 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3005 | { | |
041e0e3b | 3006 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
3007 | timeout <<= 1; |
3008 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3009 | return NFS4_LOCK_MAXTIMEOUT; | |
3010 | return timeout; | |
3011 | } | |
3012 | ||
1da177e4 LT |
3013 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3014 | { | |
3015 | struct inode *inode = state->inode; | |
3016 | struct nfs_server *server = NFS_SERVER(inode); | |
3017 | struct nfs4_client *clp = server->nfs4_state; | |
911d1aaf | 3018 | struct nfs_lockt_args arg = { |
1da177e4 | 3019 | .fh = NFS_FH(inode), |
911d1aaf | 3020 | .fl = request, |
1da177e4 | 3021 | }; |
911d1aaf TM |
3022 | struct nfs_lockt_res res = { |
3023 | .denied = request, | |
1da177e4 LT |
3024 | }; |
3025 | struct rpc_message msg = { | |
3026 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3027 | .rpc_argp = &arg, | |
3028 | .rpc_resp = &res, | |
3029 | .rpc_cred = state->owner->so_cred, | |
3030 | }; | |
1da177e4 LT |
3031 | struct nfs4_lock_state *lsp; |
3032 | int status; | |
3033 | ||
3034 | down_read(&clp->cl_sem); | |
911d1aaf | 3035 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3036 | status = nfs4_set_lock_state(state, request); |
3037 | if (status != 0) | |
3038 | goto out; | |
3039 | lsp = request->fl_u.nfs4_fl.owner; | |
911d1aaf | 3040 | arg.lock_owner.id = lsp->ls_id; |
1da177e4 | 3041 | status = rpc_call_sync(server->client, &msg, 0); |
911d1aaf TM |
3042 | switch (status) { |
3043 | case 0: | |
3044 | request->fl_type = F_UNLCK; | |
3045 | break; | |
3046 | case -NFS4ERR_DENIED: | |
3047 | status = 0; | |
1da177e4 | 3048 | } |
8d0a8a9d | 3049 | out: |
1da177e4 LT |
3050 | up_read(&clp->cl_sem); |
3051 | return status; | |
3052 | } | |
3053 | ||
3054 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3055 | { | |
3056 | struct nfs4_exception exception = { }; | |
3057 | int err; | |
3058 | ||
3059 | do { | |
3060 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3061 | _nfs4_proc_getlk(state, cmd, request), | |
3062 | &exception); | |
3063 | } while (exception.retry); | |
3064 | return err; | |
3065 | } | |
3066 | ||
3067 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3068 | { | |
3069 | int res = 0; | |
3070 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3071 | case FL_POSIX: | |
3072 | res = posix_lock_file_wait(file, fl); | |
3073 | break; | |
3074 | case FL_FLOCK: | |
3075 | res = flock_lock_file_wait(file, fl); | |
3076 | break; | |
3077 | default: | |
3078 | BUG(); | |
3079 | } | |
3080 | if (res < 0) | |
3081 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", | |
3082 | __FUNCTION__); | |
3083 | return res; | |
3084 | } | |
3085 | ||
faf5f49c | 3086 | struct nfs4_unlockdata { |
911d1aaf TM |
3087 | struct nfs_locku_args arg; |
3088 | struct nfs_locku_res res; | |
faf5f49c TM |
3089 | struct nfs4_lock_state *lsp; |
3090 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3091 | struct file_lock fl; |
3092 | const struct nfs_server *server; | |
26e976a8 | 3093 | unsigned long timestamp; |
faf5f49c TM |
3094 | }; |
3095 | ||
911d1aaf TM |
3096 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3097 | struct nfs_open_context *ctx, | |
3098 | struct nfs4_lock_state *lsp, | |
3099 | struct nfs_seqid *seqid) | |
3100 | { | |
3101 | struct nfs4_unlockdata *p; | |
3102 | struct inode *inode = lsp->ls_state->inode; | |
3103 | ||
3104 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3105 | if (p == NULL) | |
3106 | return NULL; | |
3107 | p->arg.fh = NFS_FH(inode); | |
3108 | p->arg.fl = &p->fl; | |
3109 | p->arg.seqid = seqid; | |
3110 | p->arg.stateid = &lsp->ls_stateid; | |
3111 | p->lsp = lsp; | |
3112 | atomic_inc(&lsp->ls_count); | |
3113 | /* Ensure we don't close file until we're done freeing locks! */ | |
3114 | p->ctx = get_nfs_open_context(ctx); | |
3115 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3116 | p->server = NFS_SERVER(inode); | |
3117 | return p; | |
3118 | } | |
3119 | ||
06f814a3 | 3120 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3121 | { |
963d8fe5 | 3122 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3123 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3124 | nfs4_put_lock_state(calldata->lsp); |
3125 | put_nfs_open_context(calldata->ctx); | |
3126 | kfree(calldata); | |
faf5f49c TM |
3127 | } |
3128 | ||
963d8fe5 | 3129 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3130 | { |
963d8fe5 | 3131 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3132 | |
06f814a3 TM |
3133 | if (RPC_ASSASSINATED(task)) |
3134 | return; | |
911d1aaf | 3135 | nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid); |
faf5f49c TM |
3136 | switch (task->tk_status) { |
3137 | case 0: | |
3138 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3139 | calldata->res.stateid.data, |
faf5f49c | 3140 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3141 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c TM |
3142 | break; |
3143 | case -NFS4ERR_STALE_STATEID: | |
3144 | case -NFS4ERR_EXPIRED: | |
911d1aaf | 3145 | nfs4_schedule_state_recovery(calldata->server->nfs4_state); |
faf5f49c TM |
3146 | break; |
3147 | default: | |
911d1aaf | 3148 | if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) { |
faf5f49c | 3149 | rpc_restart_call(task); |
faf5f49c TM |
3150 | } |
3151 | } | |
faf5f49c TM |
3152 | } |
3153 | ||
4ce70ada | 3154 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3155 | { |
4ce70ada | 3156 | struct nfs4_unlockdata *calldata = data; |
1da177e4 LT |
3157 | struct rpc_message msg = { |
3158 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
3159 | .rpc_argp = &calldata->arg, |
3160 | .rpc_resp = &calldata->res, | |
3161 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 3162 | }; |
faf5f49c | 3163 | |
911d1aaf | 3164 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3165 | return; |
3166 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3167 | /* Note: exit _without_ running nfs4_locku_done */ |
3168 | task->tk_action = NULL; | |
faf5f49c TM |
3169 | return; |
3170 | } | |
26e976a8 | 3171 | calldata->timestamp = jiffies; |
faf5f49c TM |
3172 | rpc_call_setup(task, &msg, 0); |
3173 | } | |
3174 | ||
963d8fe5 | 3175 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3176 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3177 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3178 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3179 | }; |
3180 | ||
a5d16a4d TM |
3181 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3182 | struct nfs_open_context *ctx, | |
3183 | struct nfs4_lock_state *lsp, | |
3184 | struct nfs_seqid *seqid) | |
3185 | { | |
3186 | struct nfs4_unlockdata *data; | |
3187 | struct rpc_task *task; | |
3188 | ||
3189 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3190 | if (data == NULL) { | |
3191 | nfs_free_seqid(seqid); | |
3192 | return ERR_PTR(-ENOMEM); | |
3193 | } | |
3194 | ||
3195 | /* Unlock _before_ we do the RPC call */ | |
3196 | do_vfs_lock(fl->fl_file, fl); | |
3197 | task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data); | |
3198 | if (IS_ERR(task)) | |
3199 | nfs4_locku_release_calldata(data); | |
3200 | return task; | |
3201 | } | |
3202 | ||
faf5f49c TM |
3203 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3204 | { | |
911d1aaf | 3205 | struct nfs_seqid *seqid; |
1da177e4 | 3206 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3207 | struct rpc_task *task; |
3208 | int status = 0; | |
faf5f49c | 3209 | |
6bfc93ef TM |
3210 | /* Is this a delegated lock? */ |
3211 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
911d1aaf TM |
3212 | goto out_unlock; |
3213 | /* Is this open_owner holding any locks on the server? */ | |
3214 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) | |
3215 | goto out_unlock; | |
6bfc93ef | 3216 | |
8d0a8a9d TM |
3217 | status = nfs4_set_lock_state(state, request); |
3218 | if (status != 0) | |
911d1aaf | 3219 | goto out_unlock; |
8d0a8a9d | 3220 | lsp = request->fl_u.nfs4_fl.owner; |
06f814a3 | 3221 | status = -ENOMEM; |
911d1aaf TM |
3222 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3223 | if (seqid == NULL) | |
3224 | goto out_unlock; | |
a5d16a4d TM |
3225 | task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid); |
3226 | status = PTR_ERR(task); | |
3227 | if (IS_ERR(task)) | |
3228 | goto out_unlock; | |
3229 | status = nfs4_wait_for_completion_rpc_task(task); | |
3230 | rpc_release_task(task); | |
911d1aaf | 3231 | return status; |
911d1aaf | 3232 | out_unlock: |
faf5f49c | 3233 | do_vfs_lock(request->fl_file, request); |
1da177e4 LT |
3234 | return status; |
3235 | } | |
3236 | ||
a5d16a4d TM |
3237 | struct nfs4_lockdata { |
3238 | struct nfs_lock_args arg; | |
3239 | struct nfs_lock_res res; | |
3240 | struct nfs4_lock_state *lsp; | |
3241 | struct nfs_open_context *ctx; | |
3242 | struct file_lock fl; | |
26e976a8 | 3243 | unsigned long timestamp; |
a5d16a4d TM |
3244 | int rpc_status; |
3245 | int cancelled; | |
3246 | }; | |
3247 | ||
3248 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3249 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3250 | { |
a5d16a4d TM |
3251 | struct nfs4_lockdata *p; |
3252 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3253 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3254 | |
3255 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3256 | if (p == NULL) | |
3257 | return NULL; | |
3258 | ||
3259 | p->arg.fh = NFS_FH(inode); | |
3260 | p->arg.fl = &p->fl; | |
3261 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3262 | if (p->arg.lock_seqid == NULL) | |
3263 | goto out_free; | |
3264 | p->arg.lock_stateid = &lsp->ls_stateid; | |
3265 | p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid; | |
3266 | p->arg.lock_owner.id = lsp->ls_id; | |
3267 | p->lsp = lsp; | |
3268 | atomic_inc(&lsp->ls_count); | |
3269 | p->ctx = get_nfs_open_context(ctx); | |
3270 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3271 | return p; | |
3272 | out_free: | |
3273 | kfree(p); | |
3274 | return NULL; | |
3275 | } | |
3276 | ||
3277 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3278 | { | |
3279 | struct nfs4_lockdata *data = calldata; | |
3280 | struct nfs4_state *state = data->lsp->ls_state; | |
3281 | struct nfs4_state_owner *sp = state->owner; | |
1da177e4 | 3282 | struct rpc_message msg = { |
a5d16a4d TM |
3283 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], |
3284 | .rpc_argp = &data->arg, | |
3285 | .rpc_resp = &data->res, | |
3286 | .rpc_cred = sp->so_cred, | |
1da177e4 | 3287 | }; |
06735b34 | 3288 | |
a5d16a4d TM |
3289 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3290 | return; | |
3291 | dprintk("%s: begin!\n", __FUNCTION__); | |
3292 | /* Do we need to do an open_to_lock_owner? */ | |
3293 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3294 | data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid); | |
3295 | if (data->arg.open_seqid == NULL) { | |
3296 | data->rpc_status = -ENOMEM; | |
3297 | task->tk_action = NULL; | |
06735b34 | 3298 | goto out; |
8d0a8a9d | 3299 | } |
a5d16a4d TM |
3300 | data->arg.open_stateid = &state->stateid; |
3301 | data->arg.new_lock_owner = 1; | |
3302 | } | |
26e976a8 | 3303 | data->timestamp = jiffies; |
a5d16a4d | 3304 | rpc_call_setup(task, &msg, 0); |
06735b34 | 3305 | out: |
a5d16a4d TM |
3306 | dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status); |
3307 | } | |
3308 | ||
3309 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3310 | { | |
3311 | struct nfs4_lockdata *data = calldata; | |
3312 | ||
3313 | dprintk("%s: begin!\n", __FUNCTION__); | |
3314 | ||
3315 | data->rpc_status = task->tk_status; | |
3316 | if (RPC_ASSASSINATED(task)) | |
3317 | goto out; | |
3318 | if (data->arg.new_lock_owner != 0) { | |
3319 | nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid); | |
3320 | if (data->rpc_status == 0) | |
3321 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3322 | else | |
3323 | goto out; | |
3324 | } | |
3325 | if (data->rpc_status == 0) { | |
3326 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3327 | sizeof(data->lsp->ls_stateid.data)); | |
3328 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
26e976a8 | 3329 | renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); |
a5d16a4d TM |
3330 | } |
3331 | nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid); | |
3332 | out: | |
3333 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status); | |
3334 | } | |
3335 | ||
3336 | static void nfs4_lock_release(void *calldata) | |
3337 | { | |
3338 | struct nfs4_lockdata *data = calldata; | |
3339 | ||
3340 | dprintk("%s: begin!\n", __FUNCTION__); | |
3341 | if (data->arg.open_seqid != NULL) | |
3342 | nfs_free_seqid(data->arg.open_seqid); | |
3343 | if (data->cancelled != 0) { | |
3344 | struct rpc_task *task; | |
3345 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3346 | data->arg.lock_seqid); | |
3347 | if (!IS_ERR(task)) | |
3348 | rpc_release_task(task); | |
3349 | dprintk("%s: cancelling lock!\n", __FUNCTION__); | |
3350 | } else | |
3351 | nfs_free_seqid(data->arg.lock_seqid); | |
3352 | nfs4_put_lock_state(data->lsp); | |
3353 | put_nfs_open_context(data->ctx); | |
3354 | kfree(data); | |
3355 | dprintk("%s: done!\n", __FUNCTION__); | |
3356 | } | |
3357 | ||
3358 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3359 | .rpc_call_prepare = nfs4_lock_prepare, | |
3360 | .rpc_call_done = nfs4_lock_done, | |
3361 | .rpc_release = nfs4_lock_release, | |
3362 | }; | |
3363 | ||
3364 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3365 | { | |
3366 | struct nfs4_lockdata *data; | |
3367 | struct rpc_task *task; | |
3368 | int ret; | |
3369 | ||
3370 | dprintk("%s: begin!\n", __FUNCTION__); | |
3371 | data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data, | |
3372 | fl->fl_u.nfs4_fl.owner); | |
3373 | if (data == NULL) | |
3374 | return -ENOMEM; | |
3375 | if (IS_SETLKW(cmd)) | |
3376 | data->arg.block = 1; | |
3377 | if (reclaim != 0) | |
3378 | data->arg.reclaim = 1; | |
3379 | task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC, | |
3380 | &nfs4_lock_ops, data); | |
3381 | if (IS_ERR(task)) { | |
3382 | nfs4_lock_release(data); | |
3383 | return PTR_ERR(task); | |
3384 | } | |
3385 | ret = nfs4_wait_for_completion_rpc_task(task); | |
3386 | if (ret == 0) { | |
3387 | ret = data->rpc_status; | |
3388 | if (ret == -NFS4ERR_DENIED) | |
3389 | ret = -EAGAIN; | |
3390 | } else | |
3391 | data->cancelled = 1; | |
3392 | rpc_release_task(task); | |
3393 | dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret); | |
3394 | return ret; | |
1da177e4 LT |
3395 | } |
3396 | ||
3397 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3398 | { | |
202b50dc TM |
3399 | struct nfs_server *server = NFS_SERVER(state->inode); |
3400 | struct nfs4_exception exception = { }; | |
3401 | int err; | |
3402 | ||
6bfc93ef TM |
3403 | /* Cache the lock if possible... */ |
3404 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3405 | return 0; | |
202b50dc TM |
3406 | do { |
3407 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
3408 | if (err != -NFS4ERR_DELAY) | |
3409 | break; | |
3410 | nfs4_handle_exception(server, err, &exception); | |
3411 | } while (exception.retry); | |
3412 | return err; | |
1da177e4 LT |
3413 | } |
3414 | ||
3415 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3416 | { | |
202b50dc TM |
3417 | struct nfs_server *server = NFS_SERVER(state->inode); |
3418 | struct nfs4_exception exception = { }; | |
3419 | int err; | |
3420 | ||
6bfc93ef TM |
3421 | err = nfs4_set_lock_state(state, request); |
3422 | if (err != 0) | |
3423 | return err; | |
202b50dc TM |
3424 | do { |
3425 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
3426 | if (err != -NFS4ERR_DELAY) | |
3427 | break; | |
3428 | nfs4_handle_exception(server, err, &exception); | |
3429 | } while (exception.retry); | |
3430 | return err; | |
1da177e4 LT |
3431 | } |
3432 | ||
3433 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3434 | { | |
3435 | struct nfs4_client *clp = state->owner->so_client; | |
3436 | int status; | |
3437 | ||
6bfc93ef | 3438 | /* Is this a delegated open? */ |
ff604066 | 3439 | if (NFS_I(state->inode)->delegation_state != 0) { |
6bfc93ef TM |
3440 | /* Yes: cache locks! */ |
3441 | status = do_vfs_lock(request->fl_file, request); | |
3442 | /* ...but avoid races with delegation recall... */ | |
3443 | if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
ff604066 | 3444 | return status; |
1da177e4 | 3445 | } |
ff604066 | 3446 | down_read(&clp->cl_sem); |
6bfc93ef TM |
3447 | status = nfs4_set_lock_state(state, request); |
3448 | if (status != 0) | |
3449 | goto out; | |
3450 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
3451 | if (status != 0) | |
3452 | goto out; | |
3453 | /* Note: we always want to sleep here! */ | |
3454 | request->fl_flags |= FL_SLEEP; | |
3455 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3456 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
3457 | out: | |
1da177e4 LT |
3458 | up_read(&clp->cl_sem); |
3459 | return status; | |
3460 | } | |
3461 | ||
3462 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3463 | { | |
3464 | struct nfs4_exception exception = { }; | |
3465 | int err; | |
3466 | ||
3467 | do { | |
3468 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3469 | _nfs4_proc_setlk(state, cmd, request), | |
3470 | &exception); | |
3471 | } while (exception.retry); | |
3472 | return err; | |
3473 | } | |
3474 | ||
3475 | static int | |
3476 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3477 | { | |
3478 | struct nfs_open_context *ctx; | |
3479 | struct nfs4_state *state; | |
3480 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3481 | int status; | |
3482 | ||
3483 | /* verify open state */ | |
3484 | ctx = (struct nfs_open_context *)filp->private_data; | |
3485 | state = ctx->state; | |
3486 | ||
3487 | if (request->fl_start < 0 || request->fl_end < 0) | |
3488 | return -EINVAL; | |
3489 | ||
3490 | if (IS_GETLK(cmd)) | |
3491 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3492 | ||
3493 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3494 | return -EINVAL; | |
3495 | ||
3496 | if (request->fl_type == F_UNLCK) | |
3497 | return nfs4_proc_unlck(state, cmd, request); | |
3498 | ||
3499 | do { | |
3500 | status = nfs4_proc_setlk(state, cmd, request); | |
3501 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3502 | break; | |
3503 | timeout = nfs4_set_lock_task_retry(timeout); | |
3504 | status = -ERESTARTSYS; | |
3505 | if (signalled()) | |
3506 | break; | |
3507 | } while(status < 0); | |
1da177e4 LT |
3508 | return status; |
3509 | } | |
3510 | ||
888e694c TM |
3511 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3512 | { | |
3513 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3514 | struct nfs4_exception exception = { }; | |
3515 | int err; | |
3516 | ||
3517 | err = nfs4_set_lock_state(state, fl); | |
3518 | if (err != 0) | |
3519 | goto out; | |
3520 | do { | |
3521 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3522 | if (err != -NFS4ERR_DELAY) | |
3523 | break; | |
3524 | err = nfs4_handle_exception(server, err, &exception); | |
3525 | } while (exception.retry); | |
3526 | out: | |
3527 | return err; | |
3528 | } | |
6b3b5496 | 3529 | |
aa1870af BF |
3530 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3531 | ||
6b3b5496 BF |
3532 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3533 | size_t buflen, int flags) | |
3534 | { | |
4b580ee3 BF |
3535 | struct inode *inode = dentry->d_inode; |
3536 | ||
3537 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3538 | return -EOPNOTSUPP; | |
3539 | ||
3540 | if (!S_ISREG(inode->i_mode) && | |
3541 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3542 | return -EPERM; | |
3543 | ||
3544 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3545 | } |
3546 | ||
3547 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3548 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3549 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3550 | * attributes in kernel-managed attribute namespaces. */ | |
3551 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3552 | size_t buflen) | |
3553 | { | |
aa1870af BF |
3554 | struct inode *inode = dentry->d_inode; |
3555 | ||
3556 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3557 | return -EOPNOTSUPP; | |
3558 | ||
3559 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3560 | } |
3561 | ||
3562 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3563 | { | |
aa1870af | 3564 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 BF |
3565 | |
3566 | if (buf && buflen < len) | |
3567 | return -ERANGE; | |
3568 | if (buf) | |
aa1870af BF |
3569 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3570 | return len; | |
6b3b5496 BF |
3571 | } |
3572 | ||
1da177e4 LT |
3573 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3574 | .recover_open = nfs4_open_reclaim, | |
3575 | .recover_lock = nfs4_lock_reclaim, | |
3576 | }; | |
3577 | ||
3578 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3579 | .recover_open = nfs4_open_expired, | |
3580 | .recover_lock = nfs4_lock_expired, | |
3581 | }; | |
3582 | ||
6b3b5496 BF |
3583 | static struct inode_operations nfs4_file_inode_operations = { |
3584 | .permission = nfs_permission, | |
3585 | .getattr = nfs_getattr, | |
3586 | .setattr = nfs_setattr, | |
3587 | .getxattr = nfs4_getxattr, | |
3588 | .setxattr = nfs4_setxattr, | |
3589 | .listxattr = nfs4_listxattr, | |
3590 | }; | |
3591 | ||
1da177e4 LT |
3592 | struct nfs_rpc_ops nfs_v4_clientops = { |
3593 | .version = 4, /* protocol version */ | |
3594 | .dentry_ops = &nfs4_dentry_operations, | |
3595 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3596 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3597 | .getroot = nfs4_proc_get_root, |
3598 | .getattr = nfs4_proc_getattr, | |
3599 | .setattr = nfs4_proc_setattr, | |
3600 | .lookup = nfs4_proc_lookup, | |
3601 | .access = nfs4_proc_access, | |
3602 | .readlink = nfs4_proc_readlink, | |
3603 | .read = nfs4_proc_read, | |
3604 | .write = nfs4_proc_write, | |
3605 | .commit = nfs4_proc_commit, | |
3606 | .create = nfs4_proc_create, | |
3607 | .remove = nfs4_proc_remove, | |
3608 | .unlink_setup = nfs4_proc_unlink_setup, | |
3609 | .unlink_done = nfs4_proc_unlink_done, | |
3610 | .rename = nfs4_proc_rename, | |
3611 | .link = nfs4_proc_link, | |
3612 | .symlink = nfs4_proc_symlink, | |
3613 | .mkdir = nfs4_proc_mkdir, | |
3614 | .rmdir = nfs4_proc_remove, | |
3615 | .readdir = nfs4_proc_readdir, | |
3616 | .mknod = nfs4_proc_mknod, | |
3617 | .statfs = nfs4_proc_statfs, | |
3618 | .fsinfo = nfs4_proc_fsinfo, | |
3619 | .pathconf = nfs4_proc_pathconf, | |
3620 | .decode_dirent = nfs4_decode_dirent, | |
3621 | .read_setup = nfs4_proc_read_setup, | |
3622 | .write_setup = nfs4_proc_write_setup, | |
3623 | .commit_setup = nfs4_proc_commit_setup, | |
02a913a7 TM |
3624 | .file_open = nfs_open, |
3625 | .file_release = nfs_release, | |
1da177e4 | 3626 | .lock = nfs4_proc_lock, |
e50a1c2e | 3627 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3628 | }; |
3629 | ||
3630 | /* | |
3631 | * Local variables: | |
3632 | * c-basic-offset: 8 | |
3633 | * End: | |
3634 | */ |