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> | |
50 | ||
4ce79717 | 51 | #include "nfs4_fs.h" |
1da177e4 LT |
52 | #include "delegation.h" |
53 | ||
54 | #define NFSDBG_FACILITY NFSDBG_PROC | |
55 | ||
56 | #define NFS4_POLL_RETRY_MIN (1*HZ) | |
57 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
58 | ||
0a8838f9 | 59 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid); |
1da177e4 | 60 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
faf5f49c | 61 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *); |
1da177e4 | 62 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry); |
faf5f49c | 63 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception); |
1da177e4 LT |
64 | extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus); |
65 | extern struct rpc_procinfo nfs4_procedures[]; | |
66 | ||
1da177e4 LT |
67 | /* Prevent leaks of NFSv4 errors into userland */ |
68 | int nfs4_map_errors(int err) | |
69 | { | |
70 | if (err < -1000) { | |
71 | dprintk("%s could not handle NFSv4 error %d\n", | |
72 | __FUNCTION__, -err); | |
73 | return -EIO; | |
74 | } | |
75 | return err; | |
76 | } | |
77 | ||
78 | /* | |
79 | * This is our standard bitmap for GETATTR requests. | |
80 | */ | |
81 | const u32 nfs4_fattr_bitmap[2] = { | |
82 | FATTR4_WORD0_TYPE | |
83 | | FATTR4_WORD0_CHANGE | |
84 | | FATTR4_WORD0_SIZE | |
85 | | FATTR4_WORD0_FSID | |
86 | | FATTR4_WORD0_FILEID, | |
87 | FATTR4_WORD1_MODE | |
88 | | FATTR4_WORD1_NUMLINKS | |
89 | | FATTR4_WORD1_OWNER | |
90 | | FATTR4_WORD1_OWNER_GROUP | |
91 | | FATTR4_WORD1_RAWDEV | |
92 | | FATTR4_WORD1_SPACE_USED | |
93 | | FATTR4_WORD1_TIME_ACCESS | |
94 | | FATTR4_WORD1_TIME_METADATA | |
95 | | FATTR4_WORD1_TIME_MODIFY | |
96 | }; | |
97 | ||
98 | const u32 nfs4_statfs_bitmap[2] = { | |
99 | FATTR4_WORD0_FILES_AVAIL | |
100 | | FATTR4_WORD0_FILES_FREE | |
101 | | FATTR4_WORD0_FILES_TOTAL, | |
102 | FATTR4_WORD1_SPACE_AVAIL | |
103 | | FATTR4_WORD1_SPACE_FREE | |
104 | | FATTR4_WORD1_SPACE_TOTAL | |
105 | }; | |
106 | ||
4ce79717 | 107 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
108 | FATTR4_WORD0_MAXLINK |
109 | | FATTR4_WORD0_MAXNAME, | |
110 | 0 | |
111 | }; | |
112 | ||
113 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
114 | | FATTR4_WORD0_MAXREAD | |
115 | | FATTR4_WORD0_MAXWRITE | |
116 | | FATTR4_WORD0_LEASE_TIME, | |
117 | 0 | |
118 | }; | |
119 | ||
120 | static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry, | |
121 | struct nfs4_readdir_arg *readdir) | |
122 | { | |
123 | u32 *start, *p; | |
124 | ||
125 | BUG_ON(readdir->count < 80); | |
126 | if (cookie > 2) { | |
b7ef1956 | 127 | readdir->cookie = cookie; |
1da177e4 LT |
128 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
129 | return; | |
130 | } | |
131 | ||
132 | readdir->cookie = 0; | |
133 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
134 | if (cookie == 2) | |
135 | return; | |
136 | ||
137 | /* | |
138 | * NFSv4 servers do not return entries for '.' and '..' | |
139 | * Therefore, we fake these entries here. We let '.' | |
140 | * have cookie 0 and '..' have cookie 1. Note that | |
141 | * when talking to the server, we always send cookie 0 | |
142 | * instead of 1 or 2. | |
143 | */ | |
144 | start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0); | |
145 | ||
146 | if (cookie == 0) { | |
147 | *p++ = xdr_one; /* next */ | |
148 | *p++ = xdr_zero; /* cookie, first word */ | |
149 | *p++ = xdr_one; /* cookie, second word */ | |
150 | *p++ = xdr_one; /* entry len */ | |
151 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
152 | p++; | |
153 | *p++ = xdr_one; /* bitmap length */ | |
154 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
155 | *p++ = htonl(8); /* attribute buffer length */ | |
156 | p = xdr_encode_hyper(p, dentry->d_inode->i_ino); | |
157 | } | |
158 | ||
159 | *p++ = xdr_one; /* next */ | |
160 | *p++ = xdr_zero; /* cookie, first word */ | |
161 | *p++ = xdr_two; /* cookie, second word */ | |
162 | *p++ = xdr_two; /* entry len */ | |
163 | memcpy(p, "..\0\0", 4); /* entry */ | |
164 | p++; | |
165 | *p++ = xdr_one; /* bitmap length */ | |
166 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
167 | *p++ = htonl(8); /* attribute buffer length */ | |
168 | p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino); | |
169 | ||
170 | readdir->pgbase = (char *)p - (char *)start; | |
171 | readdir->count -= readdir->pgbase; | |
172 | kunmap_atomic(start, KM_USER0); | |
173 | } | |
174 | ||
175 | static void | |
176 | renew_lease(struct nfs_server *server, unsigned long timestamp) | |
177 | { | |
178 | struct nfs4_client *clp = server->nfs4_state; | |
179 | spin_lock(&clp->cl_lock); | |
180 | if (time_before(clp->cl_last_renewal,timestamp)) | |
181 | clp->cl_last_renewal = timestamp; | |
182 | spin_unlock(&clp->cl_lock); | |
183 | } | |
184 | ||
185 | static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo) | |
186 | { | |
187 | struct nfs_inode *nfsi = NFS_I(inode); | |
188 | ||
189 | if (cinfo->before == nfsi->change_attr && cinfo->atomic) | |
190 | nfsi->change_attr = cinfo->after; | |
191 | } | |
192 | ||
9512135d TM |
193 | /* Helper for asynchronous RPC calls */ |
194 | static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin, | |
195 | rpc_action tk_exit, void *calldata) | |
196 | { | |
197 | struct rpc_task *task; | |
198 | ||
199 | if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC))) | |
200 | return -ENOMEM; | |
201 | ||
202 | task->tk_calldata = calldata; | |
203 | task->tk_action = tk_begin; | |
204 | rpc_execute(task); | |
205 | return 0; | |
206 | } | |
207 | ||
1da177e4 LT |
208 | static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags) |
209 | { | |
210 | struct inode *inode = state->inode; | |
211 | ||
212 | open_flags &= (FMODE_READ|FMODE_WRITE); | |
213 | /* Protect against nfs4_find_state() */ | |
214 | spin_lock(&inode->i_lock); | |
215 | state->state |= open_flags; | |
216 | /* NB! List reordering - see the reclaim code for why. */ | |
217 | if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++) | |
218 | list_move(&state->open_states, &state->owner->so_states); | |
219 | if (open_flags & FMODE_READ) | |
220 | state->nreaders++; | |
221 | memcpy(&state->stateid, stateid, sizeof(state->stateid)); | |
222 | spin_unlock(&inode->i_lock); | |
223 | } | |
224 | ||
225 | /* | |
226 | * OPEN_RECLAIM: | |
227 | * reclaim state on the server after a reboot. | |
1da177e4 LT |
228 | */ |
229 | static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
230 | { | |
231 | struct inode *inode = state->inode; | |
232 | struct nfs_server *server = NFS_SERVER(inode); | |
233 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; | |
234 | struct nfs_openargs o_arg = { | |
235 | .fh = NFS_FH(inode), | |
1da177e4 LT |
236 | .id = sp->so_id, |
237 | .open_flags = state->state, | |
238 | .clientid = server->nfs4_state->cl_clientid, | |
239 | .claim = NFS4_OPEN_CLAIM_PREVIOUS, | |
240 | .bitmask = server->attr_bitmask, | |
241 | }; | |
242 | struct nfs_openres o_res = { | |
243 | .server = server, /* Grrr */ | |
244 | }; | |
245 | struct rpc_message msg = { | |
246 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], | |
247 | .rpc_argp = &o_arg, | |
248 | .rpc_resp = &o_res, | |
249 | .rpc_cred = sp->so_cred, | |
250 | }; | |
251 | int status; | |
252 | ||
253 | if (delegation != NULL) { | |
254 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
255 | memcpy(&state->stateid, &delegation->stateid, | |
256 | sizeof(state->stateid)); | |
257 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
258 | return 0; | |
259 | } | |
260 | o_arg.u.delegation_type = delegation->type; | |
261 | } | |
cee54fc9 TM |
262 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
263 | if (o_arg.seqid == NULL) | |
264 | return -ENOMEM; | |
1da177e4 | 265 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
cee54fc9 TM |
266 | /* Confirm the sequence as being established */ |
267 | nfs_confirm_seqid(&sp->so_seqid, status); | |
268 | nfs_increment_open_seqid(status, o_arg.seqid); | |
1da177e4 LT |
269 | if (status == 0) { |
270 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); | |
271 | if (o_res.delegation_type != 0) { | |
272 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); | |
273 | /* Did the server issue an immediate delegation recall? */ | |
274 | if (o_res.do_recall) | |
275 | nfs_async_inode_return_delegation(inode, &o_res.stateid); | |
276 | } | |
277 | } | |
cee54fc9 | 278 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
279 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
280 | /* Ensure we update the inode attributes */ | |
281 | NFS_CACHEINV(inode); | |
282 | return status; | |
283 | } | |
284 | ||
285 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
286 | { | |
287 | struct nfs_server *server = NFS_SERVER(state->inode); | |
288 | struct nfs4_exception exception = { }; | |
289 | int err; | |
290 | do { | |
291 | err = _nfs4_open_reclaim(sp, state); | |
202b50dc TM |
292 | if (err != -NFS4ERR_DELAY) |
293 | break; | |
294 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
295 | } while (exception.retry); |
296 | return err; | |
297 | } | |
298 | ||
299 | static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
300 | { | |
301 | struct nfs4_state_owner *sp = state->owner; | |
302 | struct inode *inode = dentry->d_inode; | |
303 | struct nfs_server *server = NFS_SERVER(inode); | |
304 | struct dentry *parent = dget_parent(dentry); | |
305 | struct nfs_openargs arg = { | |
306 | .fh = NFS_FH(parent->d_inode), | |
307 | .clientid = server->nfs4_state->cl_clientid, | |
308 | .name = &dentry->d_name, | |
309 | .id = sp->so_id, | |
310 | .server = server, | |
311 | .bitmask = server->attr_bitmask, | |
312 | .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR, | |
313 | }; | |
314 | struct nfs_openres res = { | |
315 | .server = server, | |
316 | }; | |
317 | struct rpc_message msg = { | |
318 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR], | |
319 | .rpc_argp = &arg, | |
320 | .rpc_resp = &res, | |
321 | .rpc_cred = sp->so_cred, | |
322 | }; | |
323 | int status = 0; | |
324 | ||
1da177e4 LT |
325 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) |
326 | goto out; | |
327 | if (state->state == 0) | |
328 | goto out; | |
cee54fc9 TM |
329 | arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
330 | status = -ENOMEM; | |
331 | if (arg.seqid == NULL) | |
332 | goto out; | |
1da177e4 LT |
333 | arg.open_flags = state->state; |
334 | memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data)); | |
335 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); | |
cee54fc9 | 336 | nfs_increment_open_seqid(status, arg.seqid); |
0a8838f9 TM |
337 | if (status != 0) |
338 | goto out_free; | |
339 | if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
340 | status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode), | |
341 | sp, &res.stateid, arg.seqid); | |
342 | if (status != 0) | |
343 | goto out_free; | |
344 | } | |
345 | nfs_confirm_seqid(&sp->so_seqid, 0); | |
1da177e4 LT |
346 | if (status >= 0) { |
347 | memcpy(state->stateid.data, res.stateid.data, | |
348 | sizeof(state->stateid.data)); | |
349 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
350 | } | |
0a8838f9 | 351 | out_free: |
cee54fc9 | 352 | nfs_free_seqid(arg.seqid); |
1da177e4 | 353 | out: |
1da177e4 LT |
354 | dput(parent); |
355 | return status; | |
356 | } | |
357 | ||
358 | int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state) | |
359 | { | |
360 | struct nfs4_exception exception = { }; | |
361 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
362 | int err; | |
363 | do { | |
364 | err = _nfs4_open_delegation_recall(dentry, state); | |
365 | switch (err) { | |
366 | case 0: | |
367 | return err; | |
368 | case -NFS4ERR_STALE_CLIENTID: | |
369 | case -NFS4ERR_STALE_STATEID: | |
370 | case -NFS4ERR_EXPIRED: | |
371 | /* Don't recall a delegation if it was lost */ | |
372 | nfs4_schedule_state_recovery(server->nfs4_state); | |
373 | return err; | |
374 | } | |
375 | err = nfs4_handle_exception(server, err, &exception); | |
376 | } while (exception.retry); | |
377 | return err; | |
378 | } | |
379 | ||
0a8838f9 | 380 | static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid) |
1da177e4 LT |
381 | { |
382 | struct nfs_open_confirmargs arg = { | |
383 | .fh = fh, | |
cee54fc9 | 384 | .seqid = seqid, |
1da177e4 LT |
385 | .stateid = *stateid, |
386 | }; | |
387 | struct nfs_open_confirmres res; | |
388 | struct rpc_message msg = { | |
389 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
390 | .rpc_argp = &arg, | |
391 | .rpc_resp = &res, | |
392 | .rpc_cred = sp->so_cred, | |
393 | }; | |
394 | int status; | |
395 | ||
396 | status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR); | |
cee54fc9 TM |
397 | /* Confirm the sequence as being established */ |
398 | nfs_confirm_seqid(&sp->so_seqid, status); | |
399 | nfs_increment_open_seqid(status, seqid); | |
1da177e4 LT |
400 | if (status >= 0) |
401 | memcpy(stateid, &res.stateid, sizeof(*stateid)); | |
402 | return status; | |
403 | } | |
404 | ||
405 | static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res) | |
406 | { | |
407 | struct nfs_server *server = NFS_SERVER(dir); | |
408 | struct rpc_message msg = { | |
409 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
410 | .rpc_argp = o_arg, | |
411 | .rpc_resp = o_res, | |
412 | .rpc_cred = sp->so_cred, | |
413 | }; | |
414 | int status; | |
415 | ||
416 | /* Update sequence id. The caller must serialize! */ | |
1da177e4 LT |
417 | o_arg->id = sp->so_id; |
418 | o_arg->clientid = sp->so_client->cl_clientid; | |
419 | ||
420 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); | |
cee54fc9 | 421 | nfs_increment_open_seqid(status, o_arg->seqid); |
1da177e4 LT |
422 | if (status != 0) |
423 | goto out; | |
424 | update_changeattr(dir, &o_res->cinfo); | |
425 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
426 | status = _nfs4_proc_open_confirm(server->client, &o_res->fh, | |
cee54fc9 | 427 | sp, &o_res->stateid, o_arg->seqid); |
1da177e4 LT |
428 | if (status != 0) |
429 | goto out; | |
430 | } | |
cee54fc9 | 431 | nfs_confirm_seqid(&sp->so_seqid, 0); |
1da177e4 LT |
432 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) |
433 | status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr); | |
434 | out: | |
435 | return status; | |
436 | } | |
437 | ||
438 | static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags) | |
439 | { | |
440 | struct nfs_access_entry cache; | |
441 | int mask = 0; | |
442 | int status; | |
443 | ||
444 | if (openflags & FMODE_READ) | |
445 | mask |= MAY_READ; | |
446 | if (openflags & FMODE_WRITE) | |
447 | mask |= MAY_WRITE; | |
448 | status = nfs_access_get_cached(inode, cred, &cache); | |
449 | if (status == 0) | |
450 | goto out; | |
451 | ||
452 | /* Be clever: ask server to check for all possible rights */ | |
453 | cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; | |
454 | cache.cred = cred; | |
455 | cache.jiffies = jiffies; | |
456 | status = _nfs4_proc_access(inode, &cache); | |
457 | if (status != 0) | |
458 | return status; | |
459 | nfs_access_add_cache(inode, &cache); | |
460 | out: | |
461 | if ((cache.mask & mask) == mask) | |
462 | return 0; | |
463 | return -EACCES; | |
464 | } | |
465 | ||
466 | /* | |
467 | * OPEN_EXPIRED: | |
468 | * reclaim state on the server after a network partition. | |
469 | * Assumes caller holds the appropriate lock | |
470 | */ | |
471 | static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) | |
472 | { | |
473 | struct dentry *parent = dget_parent(dentry); | |
474 | struct inode *dir = parent->d_inode; | |
475 | struct inode *inode = state->inode; | |
476 | struct nfs_server *server = NFS_SERVER(dir); | |
477 | struct nfs_delegation *delegation = NFS_I(inode)->delegation; | |
478 | struct nfs_fattr f_attr = { | |
479 | .valid = 0, | |
480 | }; | |
481 | struct nfs_openargs o_arg = { | |
482 | .fh = NFS_FH(dir), | |
483 | .open_flags = state->state, | |
484 | .name = &dentry->d_name, | |
485 | .bitmask = server->attr_bitmask, | |
486 | .claim = NFS4_OPEN_CLAIM_NULL, | |
487 | }; | |
488 | struct nfs_openres o_res = { | |
489 | .f_attr = &f_attr, | |
490 | .server = server, | |
491 | }; | |
492 | int status = 0; | |
493 | ||
494 | if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) { | |
495 | status = _nfs4_do_access(inode, sp->so_cred, state->state); | |
496 | if (status < 0) | |
497 | goto out; | |
498 | memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid)); | |
499 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
500 | goto out; | |
501 | } | |
cee54fc9 TM |
502 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
503 | status = -ENOMEM; | |
504 | if (o_arg.seqid == NULL) | |
505 | goto out; | |
1da177e4 LT |
506 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
507 | if (status != 0) | |
508 | goto out_nodeleg; | |
509 | /* Check if files differ */ | |
510 | if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT)) | |
511 | goto out_stale; | |
512 | /* Has the file handle changed? */ | |
513 | if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) { | |
514 | /* Verify if the change attributes are the same */ | |
515 | if (f_attr.change_attr != NFS_I(inode)->change_attr) | |
516 | goto out_stale; | |
517 | if (nfs_size_to_loff_t(f_attr.size) != inode->i_size) | |
518 | goto out_stale; | |
519 | /* Lets just pretend that this is the same file */ | |
520 | nfs_copy_fh(NFS_FH(inode), &o_res.fh); | |
521 | NFS_I(inode)->fileid = f_attr.fileid; | |
522 | } | |
523 | memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid)); | |
524 | if (o_res.delegation_type != 0) { | |
525 | if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) | |
526 | nfs_inode_set_delegation(inode, sp->so_cred, &o_res); | |
527 | else | |
528 | nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res); | |
529 | } | |
530 | out_nodeleg: | |
cee54fc9 | 531 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
532 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
533 | out: | |
534 | dput(parent); | |
535 | return status; | |
536 | out_stale: | |
537 | status = -ESTALE; | |
538 | /* Invalidate the state owner so we don't ever use it again */ | |
539 | nfs4_drop_state_owner(sp); | |
540 | d_drop(dentry); | |
541 | /* Should we be trying to close that stateid? */ | |
542 | goto out_nodeleg; | |
543 | } | |
544 | ||
202b50dc TM |
545 | static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry) |
546 | { | |
547 | struct nfs_server *server = NFS_SERVER(dentry->d_inode); | |
548 | struct nfs4_exception exception = { }; | |
549 | int err; | |
550 | ||
551 | do { | |
552 | err = _nfs4_open_expired(sp, state, dentry); | |
553 | if (err == -NFS4ERR_DELAY) | |
554 | nfs4_handle_exception(server, err, &exception); | |
555 | } while (exception.retry); | |
556 | return err; | |
557 | } | |
558 | ||
1da177e4 LT |
559 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
560 | { | |
561 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
562 | struct nfs_open_context *ctx; | |
563 | int status; | |
564 | ||
565 | spin_lock(&state->inode->i_lock); | |
566 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
567 | if (ctx->state != state) | |
568 | continue; | |
569 | get_nfs_open_context(ctx); | |
570 | spin_unlock(&state->inode->i_lock); | |
202b50dc | 571 | status = nfs4_do_open_expired(sp, state, ctx->dentry); |
1da177e4 LT |
572 | put_nfs_open_context(ctx); |
573 | return status; | |
574 | } | |
575 | spin_unlock(&state->inode->i_lock); | |
576 | return -ENOENT; | |
577 | } | |
578 | ||
579 | /* | |
580 | * Returns an nfs4_state + an extra reference to the inode | |
581 | */ | |
582 | static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res) | |
583 | { | |
584 | struct nfs_delegation *delegation; | |
585 | struct nfs_server *server = NFS_SERVER(inode); | |
586 | struct nfs4_client *clp = server->nfs4_state; | |
587 | struct nfs_inode *nfsi = NFS_I(inode); | |
588 | struct nfs4_state_owner *sp = NULL; | |
589 | struct nfs4_state *state = NULL; | |
590 | int open_flags = flags & (FMODE_READ|FMODE_WRITE); | |
591 | int err; | |
592 | ||
593 | /* Protect against reboot recovery - NOTE ORDER! */ | |
594 | down_read(&clp->cl_sem); | |
595 | /* Protect against delegation recall */ | |
596 | down_read(&nfsi->rwsem); | |
597 | delegation = NFS_I(inode)->delegation; | |
598 | err = -ENOENT; | |
599 | if (delegation == NULL || (delegation->type & open_flags) != open_flags) | |
600 | goto out_err; | |
601 | err = -ENOMEM; | |
602 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
603 | dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__); | |
604 | goto out_err; | |
605 | } | |
1da177e4 LT |
606 | state = nfs4_get_open_state(inode, sp); |
607 | if (state == NULL) | |
608 | goto out_err; | |
609 | ||
610 | err = -ENOENT; | |
611 | if ((state->state & open_flags) == open_flags) { | |
612 | spin_lock(&inode->i_lock); | |
613 | if (open_flags & FMODE_READ) | |
614 | state->nreaders++; | |
615 | if (open_flags & FMODE_WRITE) | |
616 | state->nwriters++; | |
617 | spin_unlock(&inode->i_lock); | |
618 | goto out_ok; | |
619 | } else if (state->state != 0) | |
620 | goto out_err; | |
621 | ||
622 | lock_kernel(); | |
623 | err = _nfs4_do_access(inode, cred, open_flags); | |
624 | unlock_kernel(); | |
625 | if (err != 0) | |
626 | goto out_err; | |
627 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
628 | update_open_stateid(state, &delegation->stateid, open_flags); | |
629 | out_ok: | |
1da177e4 LT |
630 | nfs4_put_state_owner(sp); |
631 | up_read(&nfsi->rwsem); | |
632 | up_read(&clp->cl_sem); | |
633 | igrab(inode); | |
634 | *res = state; | |
635 | return 0; | |
636 | out_err: | |
637 | if (sp != NULL) { | |
638 | if (state != NULL) | |
639 | nfs4_put_open_state(state); | |
1da177e4 LT |
640 | nfs4_put_state_owner(sp); |
641 | } | |
642 | up_read(&nfsi->rwsem); | |
643 | up_read(&clp->cl_sem); | |
644 | return err; | |
645 | } | |
646 | ||
647 | static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred) | |
648 | { | |
649 | struct nfs4_exception exception = { }; | |
650 | struct nfs4_state *res; | |
651 | int err; | |
652 | ||
653 | do { | |
654 | err = _nfs4_open_delegated(inode, flags, cred, &res); | |
655 | if (err == 0) | |
656 | break; | |
657 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode), | |
658 | err, &exception)); | |
659 | } while (exception.retry); | |
660 | return res; | |
661 | } | |
662 | ||
663 | /* | |
664 | * Returns an nfs4_state + an referenced inode | |
665 | */ | |
666 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
667 | { | |
668 | struct nfs4_state_owner *sp; | |
669 | struct nfs4_state *state = NULL; | |
670 | struct nfs_server *server = NFS_SERVER(dir); | |
671 | struct nfs4_client *clp = server->nfs4_state; | |
672 | struct inode *inode = NULL; | |
673 | int status; | |
674 | struct nfs_fattr f_attr = { | |
675 | .valid = 0, | |
676 | }; | |
677 | struct nfs_openargs o_arg = { | |
678 | .fh = NFS_FH(dir), | |
679 | .open_flags = flags, | |
680 | .name = &dentry->d_name, | |
681 | .server = server, | |
682 | .bitmask = server->attr_bitmask, | |
683 | .claim = NFS4_OPEN_CLAIM_NULL, | |
684 | }; | |
685 | struct nfs_openres o_res = { | |
686 | .f_attr = &f_attr, | |
687 | .server = server, | |
688 | }; | |
689 | ||
690 | /* Protect against reboot recovery conflicts */ | |
691 | down_read(&clp->cl_sem); | |
692 | status = -ENOMEM; | |
693 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
694 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
695 | goto out_err; | |
696 | } | |
697 | if (flags & O_EXCL) { | |
698 | u32 *p = (u32 *) o_arg.u.verifier.data; | |
699 | p[0] = jiffies; | |
700 | p[1] = current->pid; | |
701 | } else | |
702 | o_arg.u.attrs = sattr; | |
703 | /* Serialization for the sequence id */ | |
1da177e4 | 704 | |
cee54fc9 TM |
705 | o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); |
706 | if (o_arg.seqid == NULL) | |
707 | return -ENOMEM; | |
1da177e4 LT |
708 | status = _nfs4_proc_open(dir, sp, &o_arg, &o_res); |
709 | if (status != 0) | |
710 | goto out_err; | |
711 | ||
712 | status = -ENOMEM; | |
713 | inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr); | |
714 | if (!inode) | |
715 | goto out_err; | |
716 | state = nfs4_get_open_state(inode, sp); | |
717 | if (!state) | |
718 | goto out_err; | |
719 | update_open_stateid(state, &o_res.stateid, flags); | |
720 | if (o_res.delegation_type != 0) | |
721 | nfs_inode_set_delegation(inode, cred, &o_res); | |
cee54fc9 | 722 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
723 | nfs4_put_state_owner(sp); |
724 | up_read(&clp->cl_sem); | |
725 | *res = state; | |
726 | return 0; | |
727 | out_err: | |
728 | if (sp != NULL) { | |
729 | if (state != NULL) | |
730 | nfs4_put_open_state(state); | |
cee54fc9 | 731 | nfs_free_seqid(o_arg.seqid); |
1da177e4 LT |
732 | nfs4_put_state_owner(sp); |
733 | } | |
734 | /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */ | |
735 | up_read(&clp->cl_sem); | |
736 | if (inode != NULL) | |
737 | iput(inode); | |
738 | *res = NULL; | |
739 | return status; | |
740 | } | |
741 | ||
742 | ||
743 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
744 | { | |
745 | struct nfs4_exception exception = { }; | |
746 | struct nfs4_state *res; | |
747 | int status; | |
748 | ||
749 | do { | |
750 | status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res); | |
751 | if (status == 0) | |
752 | break; | |
753 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
754 | * book-keeping w.r.t. state-changing operations | |
755 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
756 | * It is actually a sign of a bug on the client or on the server. | |
757 | * | |
758 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 759 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
760 | * have unhashed the old state_owner for us, and that we can |
761 | * therefore safely retry using a new one. We should still warn | |
762 | * the user though... | |
763 | */ | |
764 | if (status == -NFS4ERR_BAD_SEQID) { | |
765 | printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n"); | |
766 | exception.retry = 1; | |
767 | continue; | |
768 | } | |
769 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), | |
770 | status, &exception)); | |
771 | } while (exception.retry); | |
772 | return res; | |
773 | } | |
774 | ||
775 | static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
776 | struct nfs_fh *fhandle, struct iattr *sattr, | |
777 | struct nfs4_state *state) | |
778 | { | |
779 | struct nfs_setattrargs arg = { | |
780 | .fh = fhandle, | |
781 | .iap = sattr, | |
782 | .server = server, | |
783 | .bitmask = server->attr_bitmask, | |
784 | }; | |
785 | struct nfs_setattrres res = { | |
786 | .fattr = fattr, | |
787 | .server = server, | |
788 | }; | |
789 | struct rpc_message msg = { | |
790 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
791 | .rpc_argp = &arg, | |
792 | .rpc_resp = &res, | |
793 | }; | |
65e4308d | 794 | int status; |
1da177e4 LT |
795 | |
796 | fattr->valid = 0; | |
797 | ||
08e9eac4 | 798 | if (state != NULL) { |
1da177e4 | 799 | msg.rpc_cred = state->owner->so_cred; |
08e9eac4 TM |
800 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
801 | } else | |
1da177e4 LT |
802 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
803 | ||
65e4308d TM |
804 | status = rpc_call_sync(server->client, &msg, 0); |
805 | return status; | |
1da177e4 LT |
806 | } |
807 | ||
808 | static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr, | |
809 | struct nfs_fh *fhandle, struct iattr *sattr, | |
810 | struct nfs4_state *state) | |
811 | { | |
812 | struct nfs4_exception exception = { }; | |
813 | int err; | |
814 | do { | |
815 | err = nfs4_handle_exception(server, | |
816 | _nfs4_do_setattr(server, fattr, fhandle, sattr, | |
817 | state), | |
818 | &exception); | |
819 | } while (exception.retry); | |
820 | return err; | |
821 | } | |
822 | ||
823 | struct nfs4_closedata { | |
824 | struct inode *inode; | |
825 | struct nfs4_state *state; | |
826 | struct nfs_closeargs arg; | |
827 | struct nfs_closeres res; | |
828 | }; | |
829 | ||
9512135d TM |
830 | static void nfs4_free_closedata(struct nfs4_closedata *calldata) |
831 | { | |
832 | struct nfs4_state *state = calldata->state; | |
833 | struct nfs4_state_owner *sp = state->owner; | |
9512135d TM |
834 | |
835 | nfs4_put_open_state(calldata->state); | |
836 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 837 | nfs4_put_state_owner(sp); |
9512135d TM |
838 | kfree(calldata); |
839 | } | |
840 | ||
1da177e4 LT |
841 | static void nfs4_close_done(struct rpc_task *task) |
842 | { | |
843 | struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; | |
844 | struct nfs4_state *state = calldata->state; | |
1da177e4 LT |
845 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
846 | ||
847 | /* hmm. we are done with the inode, and in the process of freeing | |
848 | * the state_owner. we keep this around to process errors | |
849 | */ | |
cee54fc9 | 850 | nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid); |
1da177e4 LT |
851 | switch (task->tk_status) { |
852 | case 0: | |
853 | memcpy(&state->stateid, &calldata->res.stateid, | |
854 | sizeof(state->stateid)); | |
855 | break; | |
856 | case -NFS4ERR_STALE_STATEID: | |
857 | case -NFS4ERR_EXPIRED: | |
858 | state->state = calldata->arg.open_flags; | |
859 | nfs4_schedule_state_recovery(server->nfs4_state); | |
860 | break; | |
861 | default: | |
862 | if (nfs4_async_handle_error(task, server) == -EAGAIN) { | |
863 | rpc_restart_call(task); | |
864 | return; | |
865 | } | |
866 | } | |
867 | state->state = calldata->arg.open_flags; | |
9512135d | 868 | nfs4_free_closedata(calldata); |
1da177e4 LT |
869 | } |
870 | ||
9512135d | 871 | static void nfs4_close_begin(struct rpc_task *task) |
1da177e4 | 872 | { |
9512135d TM |
873 | struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata; |
874 | struct nfs4_state *state = calldata->state; | |
1da177e4 LT |
875 | struct rpc_message msg = { |
876 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
877 | .rpc_argp = &calldata->arg, | |
878 | .rpc_resp = &calldata->res, | |
9512135d | 879 | .rpc_cred = state->owner->so_cred, |
1da177e4 | 880 | }; |
9512135d TM |
881 | int mode = 0; |
882 | int status; | |
883 | ||
884 | status = nfs_wait_on_sequence(calldata->arg.seqid, task); | |
885 | if (status != 0) | |
886 | return; | |
887 | /* Don't reorder reads */ | |
888 | smp_rmb(); | |
889 | /* Recalculate the new open mode in case someone reopened the file | |
890 | * while we were waiting in line to be scheduled. | |
891 | */ | |
892 | if (state->nreaders != 0) | |
893 | mode |= FMODE_READ; | |
894 | if (state->nwriters != 0) | |
895 | mode |= FMODE_WRITE; | |
896 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
897 | state->state = mode; | |
898 | if (mode == state->state) { | |
899 | nfs4_free_closedata(calldata); | |
900 | task->tk_exit = NULL; | |
901 | rpc_exit(task, 0); | |
902 | return; | |
903 | } | |
904 | if (mode != 0) | |
1da177e4 | 905 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
9512135d TM |
906 | calldata->arg.open_flags = mode; |
907 | rpc_call_setup(task, &msg, 0); | |
1da177e4 LT |
908 | } |
909 | ||
910 | /* | |
911 | * It is possible for data to be read/written from a mem-mapped file | |
912 | * after the sys_close call (which hits the vfs layer as a flush). | |
913 | * This means that we can't safely call nfsv4 close on a file until | |
914 | * the inode is cleared. This in turn means that we are not good | |
915 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
916 | * share state even when we are done with one of the three share | |
917 | * stateid's in the inode. | |
918 | * | |
919 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
920 | */ | |
921 | int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode) | |
922 | { | |
923 | struct nfs4_closedata *calldata; | |
9512135d | 924 | int status = -ENOMEM; |
1da177e4 | 925 | |
9512135d | 926 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 927 | if (calldata == NULL) |
9512135d | 928 | goto out; |
1da177e4 LT |
929 | calldata->inode = inode; |
930 | calldata->state = state; | |
931 | calldata->arg.fh = NFS_FH(inode); | |
9512135d | 932 | calldata->arg.stateid = &state->stateid; |
1da177e4 | 933 | /* Serialization for the sequence id */ |
cee54fc9 | 934 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
935 | if (calldata->arg.seqid == NULL) |
936 | goto out_free_calldata; | |
937 | ||
938 | status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin, | |
939 | nfs4_close_done, calldata); | |
940 | if (status == 0) | |
941 | goto out; | |
942 | ||
943 | nfs_free_seqid(calldata->arg.seqid); | |
944 | out_free_calldata: | |
945 | kfree(calldata); | |
946 | out: | |
947 | return status; | |
1da177e4 LT |
948 | } |
949 | ||
950 | struct inode * | |
951 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
952 | { | |
953 | struct iattr attr; | |
954 | struct rpc_cred *cred; | |
955 | struct nfs4_state *state; | |
956 | ||
957 | if (nd->flags & LOOKUP_CREATE) { | |
958 | attr.ia_mode = nd->intent.open.create_mode; | |
959 | attr.ia_valid = ATTR_MODE; | |
960 | if (!IS_POSIXACL(dir)) | |
961 | attr.ia_mode &= ~current->fs->umask; | |
962 | } else { | |
963 | attr.ia_valid = 0; | |
964 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
965 | } | |
966 | ||
967 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
968 | if (IS_ERR(cred)) | |
969 | return (struct inode *)cred; | |
970 | state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred); | |
971 | put_rpccred(cred); | |
972 | if (IS_ERR(state)) | |
973 | return (struct inode *)state; | |
974 | return state->inode; | |
975 | } | |
976 | ||
977 | int | |
978 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags) | |
979 | { | |
980 | struct rpc_cred *cred; | |
981 | struct nfs4_state *state; | |
982 | struct inode *inode; | |
983 | ||
984 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
985 | if (IS_ERR(cred)) | |
986 | return PTR_ERR(cred); | |
987 | state = nfs4_open_delegated(dentry->d_inode, openflags, cred); | |
988 | if (IS_ERR(state)) | |
989 | state = nfs4_do_open(dir, dentry, openflags, NULL, cred); | |
990 | put_rpccred(cred); | |
991 | if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0) | |
992 | return 1; | |
993 | if (IS_ERR(state)) | |
994 | return 0; | |
995 | inode = state->inode; | |
996 | if (inode == dentry->d_inode) { | |
997 | iput(inode); | |
998 | return 1; | |
999 | } | |
1000 | d_drop(dentry); | |
1001 | nfs4_close_state(state, openflags); | |
1002 | iput(inode); | |
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | ||
1007 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1008 | { | |
1009 | struct nfs4_server_caps_res res = {}; | |
1010 | struct rpc_message msg = { | |
1011 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1012 | .rpc_argp = fhandle, | |
1013 | .rpc_resp = &res, | |
1014 | }; | |
1015 | int status; | |
1016 | ||
1017 | status = rpc_call_sync(server->client, &msg, 0); | |
1018 | if (status == 0) { | |
1019 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1020 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1021 | server->caps |= NFS_CAP_ACLS; | |
1022 | if (res.has_links != 0) | |
1023 | server->caps |= NFS_CAP_HARDLINKS; | |
1024 | if (res.has_symlinks != 0) | |
1025 | server->caps |= NFS_CAP_SYMLINKS; | |
1026 | server->acl_bitmask = res.acl_bitmask; | |
1027 | } | |
1028 | return status; | |
1029 | } | |
1030 | ||
1031 | static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1032 | { | |
1033 | struct nfs4_exception exception = { }; | |
1034 | int err; | |
1035 | do { | |
1036 | err = nfs4_handle_exception(server, | |
1037 | _nfs4_server_capabilities(server, fhandle), | |
1038 | &exception); | |
1039 | } while (exception.retry); | |
1040 | return err; | |
1041 | } | |
1042 | ||
1043 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1044 | struct nfs_fsinfo *info) | |
1045 | { | |
1046 | struct nfs_fattr * fattr = info->fattr; | |
1047 | struct nfs4_lookup_root_arg args = { | |
1048 | .bitmask = nfs4_fattr_bitmap, | |
1049 | }; | |
1050 | struct nfs4_lookup_res res = { | |
1051 | .server = server, | |
1052 | .fattr = fattr, | |
1053 | .fh = fhandle, | |
1054 | }; | |
1055 | struct rpc_message msg = { | |
1056 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1057 | .rpc_argp = &args, | |
1058 | .rpc_resp = &res, | |
1059 | }; | |
1060 | fattr->valid = 0; | |
1061 | return rpc_call_sync(server->client, &msg, 0); | |
1062 | } | |
1063 | ||
1064 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1065 | struct nfs_fsinfo *info) | |
1066 | { | |
1067 | struct nfs4_exception exception = { }; | |
1068 | int err; | |
1069 | do { | |
1070 | err = nfs4_handle_exception(server, | |
1071 | _nfs4_lookup_root(server, fhandle, info), | |
1072 | &exception); | |
1073 | } while (exception.retry); | |
1074 | return err; | |
1075 | } | |
1076 | ||
1077 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1078 | struct nfs_fsinfo *info) | |
1079 | { | |
1080 | struct nfs_fattr * fattr = info->fattr; | |
1081 | unsigned char * p; | |
1082 | struct qstr q; | |
1083 | struct nfs4_lookup_arg args = { | |
1084 | .dir_fh = fhandle, | |
1085 | .name = &q, | |
1086 | .bitmask = nfs4_fattr_bitmap, | |
1087 | }; | |
1088 | struct nfs4_lookup_res res = { | |
1089 | .server = server, | |
1090 | .fattr = fattr, | |
1091 | .fh = fhandle, | |
1092 | }; | |
1093 | struct rpc_message msg = { | |
1094 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1095 | .rpc_argp = &args, | |
1096 | .rpc_resp = &res, | |
1097 | }; | |
1098 | int status; | |
1099 | ||
1100 | /* | |
1101 | * Now we do a separate LOOKUP for each component of the mount path. | |
1102 | * The LOOKUPs are done separately so that we can conveniently | |
1103 | * catch an ERR_WRONGSEC if it occurs along the way... | |
1104 | */ | |
1105 | status = nfs4_lookup_root(server, fhandle, info); | |
1106 | if (status) | |
1107 | goto out; | |
1108 | ||
1109 | p = server->mnt_path; | |
1110 | for (;;) { | |
1111 | struct nfs4_exception exception = { }; | |
1112 | ||
1113 | while (*p == '/') | |
1114 | p++; | |
1115 | if (!*p) | |
1116 | break; | |
1117 | q.name = p; | |
1118 | while (*p && (*p != '/')) | |
1119 | p++; | |
1120 | q.len = p - q.name; | |
1121 | ||
1122 | do { | |
1123 | fattr->valid = 0; | |
1124 | status = nfs4_handle_exception(server, | |
1125 | rpc_call_sync(server->client, &msg, 0), | |
1126 | &exception); | |
1127 | } while (exception.retry); | |
1128 | if (status == 0) | |
1129 | continue; | |
1130 | if (status == -ENOENT) { | |
1131 | printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path); | |
1132 | printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n"); | |
1133 | } | |
1134 | break; | |
1135 | } | |
1136 | if (status == 0) | |
1137 | status = nfs4_server_capabilities(server, fhandle); | |
1138 | if (status == 0) | |
1139 | status = nfs4_do_fsinfo(server, fhandle, info); | |
1140 | out: | |
1141 | return status; | |
1142 | } | |
1143 | ||
1144 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1145 | { | |
1146 | struct nfs4_getattr_arg args = { | |
1147 | .fh = fhandle, | |
1148 | .bitmask = server->attr_bitmask, | |
1149 | }; | |
1150 | struct nfs4_getattr_res res = { | |
1151 | .fattr = fattr, | |
1152 | .server = server, | |
1153 | }; | |
1154 | struct rpc_message msg = { | |
1155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1156 | .rpc_argp = &args, | |
1157 | .rpc_resp = &res, | |
1158 | }; | |
1159 | ||
1160 | fattr->valid = 0; | |
1161 | return rpc_call_sync(server->client, &msg, 0); | |
1162 | } | |
1163 | ||
1164 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1165 | { | |
1166 | struct nfs4_exception exception = { }; | |
1167 | int err; | |
1168 | do { | |
1169 | err = nfs4_handle_exception(server, | |
1170 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1171 | &exception); | |
1172 | } while (exception.retry); | |
1173 | return err; | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * The file is not closed if it is opened due to the a request to change | |
1178 | * the size of the file. The open call will not be needed once the | |
1179 | * VFS layer lookup-intents are implemented. | |
1180 | * | |
1181 | * Close is called when the inode is destroyed. | |
1182 | * If we haven't opened the file for O_WRONLY, we | |
1183 | * need to in the size_change case to obtain a stateid. | |
1184 | * | |
1185 | * Got race? | |
1186 | * Because OPEN is always done by name in nfsv4, it is | |
1187 | * possible that we opened a different file by the same | |
1188 | * name. We can recognize this race condition, but we | |
1189 | * can't do anything about it besides returning an error. | |
1190 | * | |
1191 | * This will be fixed with VFS changes (lookup-intent). | |
1192 | */ | |
1193 | static int | |
1194 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1195 | struct iattr *sattr) | |
1196 | { | |
08e9eac4 TM |
1197 | struct rpc_cred *cred; |
1198 | struct inode *inode = dentry->d_inode; | |
1199 | struct nfs4_state *state; | |
1da177e4 LT |
1200 | int status; |
1201 | ||
1202 | fattr->valid = 0; | |
1203 | ||
08e9eac4 TM |
1204 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); |
1205 | if (IS_ERR(cred)) | |
1206 | return PTR_ERR(cred); | |
1207 | /* Search for an existing WRITE delegation first */ | |
1208 | state = nfs4_open_delegated(inode, FMODE_WRITE, cred); | |
1209 | if (!IS_ERR(state)) { | |
1210 | /* NB: nfs4_open_delegated() bumps the inode->i_count */ | |
1211 | iput(inode); | |
1212 | } else { | |
1213 | /* Search for an existing open(O_WRITE) stateid */ | |
1da177e4 | 1214 | state = nfs4_find_state(inode, cred, FMODE_WRITE); |
1da177e4 | 1215 | } |
08e9eac4 | 1216 | |
1da177e4 LT |
1217 | status = nfs4_do_setattr(NFS_SERVER(inode), fattr, |
1218 | NFS_FH(inode), sattr, state); | |
65e4308d TM |
1219 | if (status == 0) |
1220 | nfs_setattr_update_inode(inode, sattr); | |
08e9eac4 | 1221 | if (state != NULL) |
1da177e4 | 1222 | nfs4_close_state(state, FMODE_WRITE); |
08e9eac4 | 1223 | put_rpccred(cred); |
1da177e4 LT |
1224 | return status; |
1225 | } | |
1226 | ||
1227 | static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
1228 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1229 | { | |
1230 | int status; | |
1231 | struct nfs_server *server = NFS_SERVER(dir); | |
1232 | struct nfs4_lookup_arg args = { | |
1233 | .bitmask = server->attr_bitmask, | |
1234 | .dir_fh = NFS_FH(dir), | |
1235 | .name = name, | |
1236 | }; | |
1237 | struct nfs4_lookup_res res = { | |
1238 | .server = server, | |
1239 | .fattr = fattr, | |
1240 | .fh = fhandle, | |
1241 | }; | |
1242 | struct rpc_message msg = { | |
1243 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
1244 | .rpc_argp = &args, | |
1245 | .rpc_resp = &res, | |
1246 | }; | |
1247 | ||
1248 | fattr->valid = 0; | |
1249 | ||
1250 | dprintk("NFS call lookup %s\n", name->name); | |
1251 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1252 | dprintk("NFS reply lookup: %d\n", status); | |
1253 | return status; | |
1254 | } | |
1255 | ||
1256 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1257 | { | |
1258 | struct nfs4_exception exception = { }; | |
1259 | int err; | |
1260 | do { | |
1261 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1262 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
1263 | &exception); | |
1264 | } while (exception.retry); | |
1265 | return err; | |
1266 | } | |
1267 | ||
1268 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1269 | { | |
1270 | struct nfs4_accessargs args = { | |
1271 | .fh = NFS_FH(inode), | |
1272 | }; | |
1273 | struct nfs4_accessres res = { 0 }; | |
1274 | struct rpc_message msg = { | |
1275 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
1276 | .rpc_argp = &args, | |
1277 | .rpc_resp = &res, | |
1278 | .rpc_cred = entry->cred, | |
1279 | }; | |
1280 | int mode = entry->mask; | |
1281 | int status; | |
1282 | ||
1283 | /* | |
1284 | * Determine which access bits we want to ask for... | |
1285 | */ | |
1286 | if (mode & MAY_READ) | |
1287 | args.access |= NFS4_ACCESS_READ; | |
1288 | if (S_ISDIR(inode->i_mode)) { | |
1289 | if (mode & MAY_WRITE) | |
1290 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
1291 | if (mode & MAY_EXEC) | |
1292 | args.access |= NFS4_ACCESS_LOOKUP; | |
1293 | } else { | |
1294 | if (mode & MAY_WRITE) | |
1295 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
1296 | if (mode & MAY_EXEC) | |
1297 | args.access |= NFS4_ACCESS_EXECUTE; | |
1298 | } | |
1299 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1300 | if (!status) { | |
1301 | entry->mask = 0; | |
1302 | if (res.access & NFS4_ACCESS_READ) | |
1303 | entry->mask |= MAY_READ; | |
1304 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
1305 | entry->mask |= MAY_WRITE; | |
1306 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
1307 | entry->mask |= MAY_EXEC; | |
1308 | } | |
1309 | return status; | |
1310 | } | |
1311 | ||
1312 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
1313 | { | |
1314 | struct nfs4_exception exception = { }; | |
1315 | int err; | |
1316 | do { | |
1317 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1318 | _nfs4_proc_access(inode, entry), | |
1319 | &exception); | |
1320 | } while (exception.retry); | |
1321 | return err; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * TODO: For the time being, we don't try to get any attributes | |
1326 | * along with any of the zero-copy operations READ, READDIR, | |
1327 | * READLINK, WRITE. | |
1328 | * | |
1329 | * In the case of the first three, we want to put the GETATTR | |
1330 | * after the read-type operation -- this is because it is hard | |
1331 | * to predict the length of a GETATTR response in v4, and thus | |
1332 | * align the READ data correctly. This means that the GETATTR | |
1333 | * may end up partially falling into the page cache, and we should | |
1334 | * shift it into the 'tail' of the xdr_buf before processing. | |
1335 | * To do this efficiently, we need to know the total length | |
1336 | * of data received, which doesn't seem to be available outside | |
1337 | * of the RPC layer. | |
1338 | * | |
1339 | * In the case of WRITE, we also want to put the GETATTR after | |
1340 | * the operation -- in this case because we want to make sure | |
1341 | * we get the post-operation mtime and size. This means that | |
1342 | * we can't use xdr_encode_pages() as written: we need a variant | |
1343 | * of it which would leave room in the 'tail' iovec. | |
1344 | * | |
1345 | * Both of these changes to the XDR layer would in fact be quite | |
1346 | * minor, but I decided to leave them for a subsequent patch. | |
1347 | */ | |
1348 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1349 | unsigned int pgbase, unsigned int pglen) | |
1350 | { | |
1351 | struct nfs4_readlink args = { | |
1352 | .fh = NFS_FH(inode), | |
1353 | .pgbase = pgbase, | |
1354 | .pglen = pglen, | |
1355 | .pages = &page, | |
1356 | }; | |
1357 | struct rpc_message msg = { | |
1358 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
1359 | .rpc_argp = &args, | |
1360 | .rpc_resp = NULL, | |
1361 | }; | |
1362 | ||
1363 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1364 | } | |
1365 | ||
1366 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
1367 | unsigned int pgbase, unsigned int pglen) | |
1368 | { | |
1369 | struct nfs4_exception exception = { }; | |
1370 | int err; | |
1371 | do { | |
1372 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1373 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
1374 | &exception); | |
1375 | } while (exception.retry); | |
1376 | return err; | |
1377 | } | |
1378 | ||
1379 | static int _nfs4_proc_read(struct nfs_read_data *rdata) | |
1380 | { | |
1381 | int flags = rdata->flags; | |
1382 | struct inode *inode = rdata->inode; | |
1383 | struct nfs_fattr *fattr = rdata->res.fattr; | |
1384 | struct nfs_server *server = NFS_SERVER(inode); | |
1385 | struct rpc_message msg = { | |
1386 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
1387 | .rpc_argp = &rdata->args, | |
1388 | .rpc_resp = &rdata->res, | |
1389 | .rpc_cred = rdata->cred, | |
1390 | }; | |
1391 | unsigned long timestamp = jiffies; | |
1392 | int status; | |
1393 | ||
1394 | dprintk("NFS call read %d @ %Ld\n", rdata->args.count, | |
1395 | (long long) rdata->args.offset); | |
1396 | ||
1397 | fattr->valid = 0; | |
1398 | status = rpc_call_sync(server->client, &msg, flags); | |
1399 | if (!status) | |
1400 | renew_lease(server, timestamp); | |
1401 | dprintk("NFS reply read: %d\n", status); | |
1402 | return status; | |
1403 | } | |
1404 | ||
1405 | static int nfs4_proc_read(struct nfs_read_data *rdata) | |
1406 | { | |
1407 | struct nfs4_exception exception = { }; | |
1408 | int err; | |
1409 | do { | |
1410 | err = nfs4_handle_exception(NFS_SERVER(rdata->inode), | |
1411 | _nfs4_proc_read(rdata), | |
1412 | &exception); | |
1413 | } while (exception.retry); | |
1414 | return err; | |
1415 | } | |
1416 | ||
1417 | static int _nfs4_proc_write(struct nfs_write_data *wdata) | |
1418 | { | |
1419 | int rpcflags = wdata->flags; | |
1420 | struct inode *inode = wdata->inode; | |
1421 | struct nfs_fattr *fattr = wdata->res.fattr; | |
1422 | struct nfs_server *server = NFS_SERVER(inode); | |
1423 | struct rpc_message msg = { | |
1424 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
1425 | .rpc_argp = &wdata->args, | |
1426 | .rpc_resp = &wdata->res, | |
1427 | .rpc_cred = wdata->cred, | |
1428 | }; | |
1429 | int status; | |
1430 | ||
1431 | dprintk("NFS call write %d @ %Ld\n", wdata->args.count, | |
1432 | (long long) wdata->args.offset); | |
1433 | ||
1434 | fattr->valid = 0; | |
1435 | status = rpc_call_sync(server->client, &msg, rpcflags); | |
1436 | dprintk("NFS reply write: %d\n", status); | |
1437 | return status; | |
1438 | } | |
1439 | ||
1440 | static int nfs4_proc_write(struct nfs_write_data *wdata) | |
1441 | { | |
1442 | struct nfs4_exception exception = { }; | |
1443 | int err; | |
1444 | do { | |
1445 | err = nfs4_handle_exception(NFS_SERVER(wdata->inode), | |
1446 | _nfs4_proc_write(wdata), | |
1447 | &exception); | |
1448 | } while (exception.retry); | |
1449 | return err; | |
1450 | } | |
1451 | ||
1452 | static int _nfs4_proc_commit(struct nfs_write_data *cdata) | |
1453 | { | |
1454 | struct inode *inode = cdata->inode; | |
1455 | struct nfs_fattr *fattr = cdata->res.fattr; | |
1456 | struct nfs_server *server = NFS_SERVER(inode); | |
1457 | struct rpc_message msg = { | |
1458 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
1459 | .rpc_argp = &cdata->args, | |
1460 | .rpc_resp = &cdata->res, | |
1461 | .rpc_cred = cdata->cred, | |
1462 | }; | |
1463 | int status; | |
1464 | ||
1465 | dprintk("NFS call commit %d @ %Ld\n", cdata->args.count, | |
1466 | (long long) cdata->args.offset); | |
1467 | ||
1468 | fattr->valid = 0; | |
1469 | status = rpc_call_sync(server->client, &msg, 0); | |
1470 | dprintk("NFS reply commit: %d\n", status); | |
1471 | return status; | |
1472 | } | |
1473 | ||
1474 | static int nfs4_proc_commit(struct nfs_write_data *cdata) | |
1475 | { | |
1476 | struct nfs4_exception exception = { }; | |
1477 | int err; | |
1478 | do { | |
1479 | err = nfs4_handle_exception(NFS_SERVER(cdata->inode), | |
1480 | _nfs4_proc_commit(cdata), | |
1481 | &exception); | |
1482 | } while (exception.retry); | |
1483 | return err; | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | * Got race? | |
1488 | * We will need to arrange for the VFS layer to provide an atomic open. | |
1489 | * Until then, this create/open method is prone to inefficiency and race | |
1490 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
1491 | * placed on the wire. | |
1492 | * | |
1493 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
1494 | * The file will be opened again in the subsequent VFS open call | |
1495 | * (nfs4_proc_file_open). | |
1496 | * | |
1497 | * The open for read will just hang around to be used by any process that | |
1498 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
1499 | */ | |
1500 | ||
1501 | static int | |
1502 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
1503 | int flags) | |
1504 | { | |
1505 | struct nfs4_state *state; | |
1506 | struct rpc_cred *cred; | |
1507 | int status = 0; | |
1508 | ||
1509 | cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0); | |
1510 | if (IS_ERR(cred)) { | |
1511 | status = PTR_ERR(cred); | |
1512 | goto out; | |
1513 | } | |
1514 | state = nfs4_do_open(dir, dentry, flags, sattr, cred); | |
1515 | put_rpccred(cred); | |
1516 | if (IS_ERR(state)) { | |
1517 | status = PTR_ERR(state); | |
1518 | goto out; | |
1519 | } | |
1520 | d_instantiate(dentry, state->inode); | |
1521 | if (flags & O_EXCL) { | |
1522 | struct nfs_fattr fattr; | |
1523 | status = nfs4_do_setattr(NFS_SERVER(dir), &fattr, | |
1524 | NFS_FH(state->inode), sattr, state); | |
65e4308d TM |
1525 | if (status == 0) { |
1526 | nfs_setattr_update_inode(state->inode, sattr); | |
1da177e4 | 1527 | goto out; |
65e4308d | 1528 | } |
1da177e4 LT |
1529 | } else if (flags != 0) |
1530 | goto out; | |
1531 | nfs4_close_state(state, flags); | |
1532 | out: | |
1533 | return status; | |
1534 | } | |
1535 | ||
1536 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1537 | { | |
1538 | struct nfs4_remove_arg args = { | |
1539 | .fh = NFS_FH(dir), | |
1540 | .name = name, | |
1541 | }; | |
1542 | struct nfs4_change_info res; | |
1543 | struct rpc_message msg = { | |
1544 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
1545 | .rpc_argp = &args, | |
1546 | .rpc_resp = &res, | |
1547 | }; | |
1548 | int status; | |
1549 | ||
1550 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1551 | if (status == 0) | |
1552 | update_changeattr(dir, &res); | |
1553 | return status; | |
1554 | } | |
1555 | ||
1556 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
1557 | { | |
1558 | struct nfs4_exception exception = { }; | |
1559 | int err; | |
1560 | do { | |
1561 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1562 | _nfs4_proc_remove(dir, name), | |
1563 | &exception); | |
1564 | } while (exception.retry); | |
1565 | return err; | |
1566 | } | |
1567 | ||
1568 | struct unlink_desc { | |
1569 | struct nfs4_remove_arg args; | |
1570 | struct nfs4_change_info res; | |
1571 | }; | |
1572 | ||
1573 | static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir, | |
1574 | struct qstr *name) | |
1575 | { | |
1576 | struct unlink_desc *up; | |
1577 | ||
1578 | up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL); | |
1579 | if (!up) | |
1580 | return -ENOMEM; | |
1581 | ||
1582 | up->args.fh = NFS_FH(dir->d_inode); | |
1583 | up->args.name = name; | |
1584 | ||
1585 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
1586 | msg->rpc_argp = &up->args; | |
1587 | msg->rpc_resp = &up->res; | |
1588 | return 0; | |
1589 | } | |
1590 | ||
1591 | static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task) | |
1592 | { | |
1593 | struct rpc_message *msg = &task->tk_msg; | |
1594 | struct unlink_desc *up; | |
1595 | ||
1596 | if (msg->rpc_resp != NULL) { | |
1597 | up = container_of(msg->rpc_resp, struct unlink_desc, res); | |
1598 | update_changeattr(dir->d_inode, &up->res); | |
1599 | kfree(up); | |
1600 | msg->rpc_resp = NULL; | |
1601 | msg->rpc_argp = NULL; | |
1602 | } | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1607 | struct inode *new_dir, struct qstr *new_name) | |
1608 | { | |
1609 | struct nfs4_rename_arg arg = { | |
1610 | .old_dir = NFS_FH(old_dir), | |
1611 | .new_dir = NFS_FH(new_dir), | |
1612 | .old_name = old_name, | |
1613 | .new_name = new_name, | |
1614 | }; | |
1615 | struct nfs4_rename_res res = { }; | |
1616 | struct rpc_message msg = { | |
1617 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
1618 | .rpc_argp = &arg, | |
1619 | .rpc_resp = &res, | |
1620 | }; | |
1621 | int status; | |
1622 | ||
1623 | status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0); | |
1624 | ||
1625 | if (!status) { | |
1626 | update_changeattr(old_dir, &res.old_cinfo); | |
1627 | update_changeattr(new_dir, &res.new_cinfo); | |
1628 | } | |
1629 | return status; | |
1630 | } | |
1631 | ||
1632 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
1633 | struct inode *new_dir, struct qstr *new_name) | |
1634 | { | |
1635 | struct nfs4_exception exception = { }; | |
1636 | int err; | |
1637 | do { | |
1638 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
1639 | _nfs4_proc_rename(old_dir, old_name, | |
1640 | new_dir, new_name), | |
1641 | &exception); | |
1642 | } while (exception.retry); | |
1643 | return err; | |
1644 | } | |
1645 | ||
1646 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1647 | { | |
1648 | struct nfs4_link_arg arg = { | |
1649 | .fh = NFS_FH(inode), | |
1650 | .dir_fh = NFS_FH(dir), | |
1651 | .name = name, | |
1652 | }; | |
1653 | struct nfs4_change_info cinfo = { }; | |
1654 | struct rpc_message msg = { | |
1655 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
1656 | .rpc_argp = &arg, | |
1657 | .rpc_resp = &cinfo, | |
1658 | }; | |
1659 | int status; | |
1660 | ||
1661 | status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
1662 | if (!status) | |
1663 | update_changeattr(dir, &cinfo); | |
1664 | ||
1665 | return status; | |
1666 | } | |
1667 | ||
1668 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
1669 | { | |
1670 | struct nfs4_exception exception = { }; | |
1671 | int err; | |
1672 | do { | |
1673 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
1674 | _nfs4_proc_link(inode, dir, name), | |
1675 | &exception); | |
1676 | } while (exception.retry); | |
1677 | return err; | |
1678 | } | |
1679 | ||
1680 | static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
1681 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
1682 | struct nfs_fattr *fattr) | |
1683 | { | |
1684 | struct nfs_server *server = NFS_SERVER(dir); | |
1685 | struct nfs4_create_arg arg = { | |
1686 | .dir_fh = NFS_FH(dir), | |
1687 | .server = server, | |
1688 | .name = name, | |
1689 | .attrs = sattr, | |
1690 | .ftype = NF4LNK, | |
1691 | .bitmask = server->attr_bitmask, | |
1692 | }; | |
1693 | struct nfs4_create_res res = { | |
1694 | .server = server, | |
1695 | .fh = fhandle, | |
1696 | .fattr = fattr, | |
1697 | }; | |
1698 | struct rpc_message msg = { | |
1699 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK], | |
1700 | .rpc_argp = &arg, | |
1701 | .rpc_resp = &res, | |
1702 | }; | |
1703 | int status; | |
1704 | ||
1705 | if (path->len > NFS4_MAXPATHLEN) | |
1706 | return -ENAMETOOLONG; | |
1707 | arg.u.symlink = path; | |
1708 | fattr->valid = 0; | |
1709 | ||
1710 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1711 | if (!status) | |
1712 | update_changeattr(dir, &res.dir_cinfo); | |
1713 | return status; | |
1714 | } | |
1715 | ||
1716 | static int nfs4_proc_symlink(struct inode *dir, struct qstr *name, | |
1717 | struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle, | |
1718 | struct nfs_fattr *fattr) | |
1719 | { | |
1720 | struct nfs4_exception exception = { }; | |
1721 | int err; | |
1722 | do { | |
1723 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1724 | _nfs4_proc_symlink(dir, name, path, sattr, | |
1725 | fhandle, fattr), | |
1726 | &exception); | |
1727 | } while (exception.retry); | |
1728 | return err; | |
1729 | } | |
1730 | ||
1731 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
1732 | struct iattr *sattr) | |
1733 | { | |
1734 | struct nfs_server *server = NFS_SERVER(dir); | |
1735 | struct nfs_fh fhandle; | |
1736 | struct nfs_fattr fattr; | |
1737 | struct nfs4_create_arg arg = { | |
1738 | .dir_fh = NFS_FH(dir), | |
1739 | .server = server, | |
1740 | .name = &dentry->d_name, | |
1741 | .attrs = sattr, | |
1742 | .ftype = NF4DIR, | |
1743 | .bitmask = server->attr_bitmask, | |
1744 | }; | |
1745 | struct nfs4_create_res res = { | |
1746 | .server = server, | |
1747 | .fh = &fhandle, | |
1748 | .fattr = &fattr, | |
1749 | }; | |
1750 | struct rpc_message msg = { | |
1751 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
1752 | .rpc_argp = &arg, | |
1753 | .rpc_resp = &res, | |
1754 | }; | |
1755 | int status; | |
1756 | ||
1757 | fattr.valid = 0; | |
1758 | ||
1759 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1760 | if (!status) { | |
1761 | update_changeattr(dir, &res.dir_cinfo); | |
1762 | status = nfs_instantiate(dentry, &fhandle, &fattr); | |
1763 | } | |
1764 | return status; | |
1765 | } | |
1766 | ||
1767 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
1768 | struct iattr *sattr) | |
1769 | { | |
1770 | struct nfs4_exception exception = { }; | |
1771 | int err; | |
1772 | do { | |
1773 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1774 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
1775 | &exception); | |
1776 | } while (exception.retry); | |
1777 | return err; | |
1778 | } | |
1779 | ||
1780 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
1781 | u64 cookie, struct page *page, unsigned int count, int plus) | |
1782 | { | |
1783 | struct inode *dir = dentry->d_inode; | |
1784 | struct nfs4_readdir_arg args = { | |
1785 | .fh = NFS_FH(dir), | |
1786 | .pages = &page, | |
1787 | .pgbase = 0, | |
1788 | .count = count, | |
1789 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
1790 | }; | |
1791 | struct nfs4_readdir_res res; | |
1792 | struct rpc_message msg = { | |
1793 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
1794 | .rpc_argp = &args, | |
1795 | .rpc_resp = &res, | |
1796 | .rpc_cred = cred, | |
1797 | }; | |
1798 | int status; | |
1799 | ||
eadf4598 TM |
1800 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__, |
1801 | dentry->d_parent->d_name.name, | |
1802 | dentry->d_name.name, | |
1803 | (unsigned long long)cookie); | |
1da177e4 LT |
1804 | lock_kernel(); |
1805 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
1806 | res.pgbase = args.pgbase; | |
1807 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1808 | if (status == 0) | |
1809 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
1810 | unlock_kernel(); | |
eadf4598 | 1811 | dprintk("%s: returns %d\n", __FUNCTION__, status); |
1da177e4 LT |
1812 | return status; |
1813 | } | |
1814 | ||
1815 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
1816 | u64 cookie, struct page *page, unsigned int count, int plus) | |
1817 | { | |
1818 | struct nfs4_exception exception = { }; | |
1819 | int err; | |
1820 | do { | |
1821 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
1822 | _nfs4_proc_readdir(dentry, cred, cookie, | |
1823 | page, count, plus), | |
1824 | &exception); | |
1825 | } while (exception.retry); | |
1826 | return err; | |
1827 | } | |
1828 | ||
1829 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
1830 | struct iattr *sattr, dev_t rdev) | |
1831 | { | |
1832 | struct nfs_server *server = NFS_SERVER(dir); | |
1833 | struct nfs_fh fh; | |
1834 | struct nfs_fattr fattr; | |
1835 | struct nfs4_create_arg arg = { | |
1836 | .dir_fh = NFS_FH(dir), | |
1837 | .server = server, | |
1838 | .name = &dentry->d_name, | |
1839 | .attrs = sattr, | |
1840 | .bitmask = server->attr_bitmask, | |
1841 | }; | |
1842 | struct nfs4_create_res res = { | |
1843 | .server = server, | |
1844 | .fh = &fh, | |
1845 | .fattr = &fattr, | |
1846 | }; | |
1847 | struct rpc_message msg = { | |
1848 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE], | |
1849 | .rpc_argp = &arg, | |
1850 | .rpc_resp = &res, | |
1851 | }; | |
1852 | int status; | |
1853 | int mode = sattr->ia_mode; | |
1854 | ||
1855 | fattr.valid = 0; | |
1856 | ||
1857 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
1858 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
1859 | if (S_ISFIFO(mode)) | |
1860 | arg.ftype = NF4FIFO; | |
1861 | else if (S_ISBLK(mode)) { | |
1862 | arg.ftype = NF4BLK; | |
1863 | arg.u.device.specdata1 = MAJOR(rdev); | |
1864 | arg.u.device.specdata2 = MINOR(rdev); | |
1865 | } | |
1866 | else if (S_ISCHR(mode)) { | |
1867 | arg.ftype = NF4CHR; | |
1868 | arg.u.device.specdata1 = MAJOR(rdev); | |
1869 | arg.u.device.specdata2 = MINOR(rdev); | |
1870 | } | |
1871 | else | |
1872 | arg.ftype = NF4SOCK; | |
1873 | ||
1874 | status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0); | |
1875 | if (status == 0) { | |
1876 | update_changeattr(dir, &res.dir_cinfo); | |
1877 | status = nfs_instantiate(dentry, &fh, &fattr); | |
1878 | } | |
1879 | return status; | |
1880 | } | |
1881 | ||
1882 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
1883 | struct iattr *sattr, dev_t rdev) | |
1884 | { | |
1885 | struct nfs4_exception exception = { }; | |
1886 | int err; | |
1887 | do { | |
1888 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
1889 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
1890 | &exception); | |
1891 | } while (exception.retry); | |
1892 | return err; | |
1893 | } | |
1894 | ||
1895 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
1896 | struct nfs_fsstat *fsstat) | |
1897 | { | |
1898 | struct nfs4_statfs_arg args = { | |
1899 | .fh = fhandle, | |
1900 | .bitmask = server->attr_bitmask, | |
1901 | }; | |
1902 | struct rpc_message msg = { | |
1903 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
1904 | .rpc_argp = &args, | |
1905 | .rpc_resp = fsstat, | |
1906 | }; | |
1907 | ||
1908 | fsstat->fattr->valid = 0; | |
1909 | return rpc_call_sync(server->client, &msg, 0); | |
1910 | } | |
1911 | ||
1912 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
1913 | { | |
1914 | struct nfs4_exception exception = { }; | |
1915 | int err; | |
1916 | do { | |
1917 | err = nfs4_handle_exception(server, | |
1918 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
1919 | &exception); | |
1920 | } while (exception.retry); | |
1921 | return err; | |
1922 | } | |
1923 | ||
1924 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
1925 | struct nfs_fsinfo *fsinfo) | |
1926 | { | |
1927 | struct nfs4_fsinfo_arg args = { | |
1928 | .fh = fhandle, | |
1929 | .bitmask = server->attr_bitmask, | |
1930 | }; | |
1931 | struct rpc_message msg = { | |
1932 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
1933 | .rpc_argp = &args, | |
1934 | .rpc_resp = fsinfo, | |
1935 | }; | |
1936 | ||
1937 | return rpc_call_sync(server->client, &msg, 0); | |
1938 | } | |
1939 | ||
1940 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
1941 | { | |
1942 | struct nfs4_exception exception = { }; | |
1943 | int err; | |
1944 | ||
1945 | do { | |
1946 | err = nfs4_handle_exception(server, | |
1947 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
1948 | &exception); | |
1949 | } while (exception.retry); | |
1950 | return err; | |
1951 | } | |
1952 | ||
1953 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
1954 | { | |
1955 | fsinfo->fattr->valid = 0; | |
1956 | return nfs4_do_fsinfo(server, fhandle, fsinfo); | |
1957 | } | |
1958 | ||
1959 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
1960 | struct nfs_pathconf *pathconf) | |
1961 | { | |
1962 | struct nfs4_pathconf_arg args = { | |
1963 | .fh = fhandle, | |
1964 | .bitmask = server->attr_bitmask, | |
1965 | }; | |
1966 | struct rpc_message msg = { | |
1967 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
1968 | .rpc_argp = &args, | |
1969 | .rpc_resp = pathconf, | |
1970 | }; | |
1971 | ||
1972 | /* None of the pathconf attributes are mandatory to implement */ | |
1973 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
1974 | memset(pathconf, 0, sizeof(*pathconf)); | |
1975 | return 0; | |
1976 | } | |
1977 | ||
1978 | pathconf->fattr->valid = 0; | |
1979 | return rpc_call_sync(server->client, &msg, 0); | |
1980 | } | |
1981 | ||
1982 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
1983 | struct nfs_pathconf *pathconf) | |
1984 | { | |
1985 | struct nfs4_exception exception = { }; | |
1986 | int err; | |
1987 | ||
1988 | do { | |
1989 | err = nfs4_handle_exception(server, | |
1990 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
1991 | &exception); | |
1992 | } while (exception.retry); | |
1993 | return err; | |
1994 | } | |
1995 | ||
1996 | static void | |
1997 | nfs4_read_done(struct rpc_task *task) | |
1998 | { | |
1999 | struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata; | |
2000 | struct inode *inode = data->inode; | |
2001 | ||
2002 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2003 | rpc_restart_call(task); | |
2004 | return; | |
2005 | } | |
2006 | if (task->tk_status > 0) | |
2007 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2008 | /* Call back common NFS readpage processing */ | |
2009 | nfs_readpage_result(task); | |
2010 | } | |
2011 | ||
2012 | static void | |
2013 | nfs4_proc_read_setup(struct nfs_read_data *data) | |
2014 | { | |
2015 | struct rpc_task *task = &data->task; | |
2016 | struct rpc_message msg = { | |
2017 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ], | |
2018 | .rpc_argp = &data->args, | |
2019 | .rpc_resp = &data->res, | |
2020 | .rpc_cred = data->cred, | |
2021 | }; | |
2022 | struct inode *inode = data->inode; | |
2023 | int flags; | |
2024 | ||
2025 | data->timestamp = jiffies; | |
2026 | ||
2027 | /* N.B. Do we need to test? Never called for swapfile inode */ | |
2028 | flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0); | |
2029 | ||
2030 | /* Finalize the task. */ | |
2031 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags); | |
2032 | rpc_call_setup(task, &msg, 0); | |
2033 | } | |
2034 | ||
2035 | static void | |
2036 | nfs4_write_done(struct rpc_task *task) | |
2037 | { | |
2038 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; | |
2039 | struct inode *inode = data->inode; | |
2040 | ||
2041 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2042 | rpc_restart_call(task); | |
2043 | return; | |
2044 | } | |
2045 | if (task->tk_status >= 0) | |
2046 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2047 | /* Call back common NFS writeback processing */ | |
2048 | nfs_writeback_done(task); | |
2049 | } | |
2050 | ||
2051 | static void | |
2052 | nfs4_proc_write_setup(struct nfs_write_data *data, int how) | |
2053 | { | |
2054 | struct rpc_task *task = &data->task; | |
2055 | struct rpc_message msg = { | |
2056 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE], | |
2057 | .rpc_argp = &data->args, | |
2058 | .rpc_resp = &data->res, | |
2059 | .rpc_cred = data->cred, | |
2060 | }; | |
2061 | struct inode *inode = data->inode; | |
2062 | int stable; | |
2063 | int flags; | |
2064 | ||
2065 | if (how & FLUSH_STABLE) { | |
2066 | if (!NFS_I(inode)->ncommit) | |
2067 | stable = NFS_FILE_SYNC; | |
2068 | else | |
2069 | stable = NFS_DATA_SYNC; | |
2070 | } else | |
2071 | stable = NFS_UNSTABLE; | |
2072 | data->args.stable = stable; | |
2073 | ||
2074 | data->timestamp = jiffies; | |
2075 | ||
2076 | /* Set the initial flags for the task. */ | |
2077 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2078 | ||
2079 | /* Finalize the task. */ | |
2080 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags); | |
2081 | rpc_call_setup(task, &msg, 0); | |
2082 | } | |
2083 | ||
2084 | static void | |
2085 | nfs4_commit_done(struct rpc_task *task) | |
2086 | { | |
2087 | struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata; | |
2088 | struct inode *inode = data->inode; | |
2089 | ||
2090 | if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) { | |
2091 | rpc_restart_call(task); | |
2092 | return; | |
2093 | } | |
2094 | /* Call back common NFS writeback processing */ | |
2095 | nfs_commit_done(task); | |
2096 | } | |
2097 | ||
2098 | static void | |
2099 | nfs4_proc_commit_setup(struct nfs_write_data *data, int how) | |
2100 | { | |
2101 | struct rpc_task *task = &data->task; | |
2102 | struct rpc_message msg = { | |
2103 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], | |
2104 | .rpc_argp = &data->args, | |
2105 | .rpc_resp = &data->res, | |
2106 | .rpc_cred = data->cred, | |
2107 | }; | |
2108 | struct inode *inode = data->inode; | |
2109 | int flags; | |
2110 | ||
2111 | /* Set the initial flags for the task. */ | |
2112 | flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC; | |
2113 | ||
2114 | /* Finalize the task. */ | |
2115 | rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags); | |
2116 | rpc_call_setup(task, &msg, 0); | |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2121 | * standalone procedure for queueing an asynchronous RENEW. | |
2122 | */ | |
2123 | static void | |
2124 | renew_done(struct rpc_task *task) | |
2125 | { | |
2126 | struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp; | |
2127 | unsigned long timestamp = (unsigned long)task->tk_calldata; | |
2128 | ||
2129 | if (task->tk_status < 0) { | |
2130 | switch (task->tk_status) { | |
2131 | case -NFS4ERR_STALE_CLIENTID: | |
2132 | case -NFS4ERR_EXPIRED: | |
2133 | case -NFS4ERR_CB_PATH_DOWN: | |
2134 | nfs4_schedule_state_recovery(clp); | |
2135 | } | |
2136 | return; | |
2137 | } | |
2138 | spin_lock(&clp->cl_lock); | |
2139 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2140 | clp->cl_last_renewal = timestamp; | |
2141 | spin_unlock(&clp->cl_lock); | |
2142 | } | |
2143 | ||
2144 | int | |
2145 | nfs4_proc_async_renew(struct nfs4_client *clp) | |
2146 | { | |
2147 | struct rpc_message msg = { | |
2148 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2149 | .rpc_argp = clp, | |
2150 | .rpc_cred = clp->cl_cred, | |
2151 | }; | |
2152 | ||
2153 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
2154 | renew_done, (void *)jiffies); | |
2155 | } | |
2156 | ||
2157 | int | |
2158 | nfs4_proc_renew(struct nfs4_client *clp) | |
2159 | { | |
2160 | struct rpc_message msg = { | |
2161 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2162 | .rpc_argp = clp, | |
2163 | .rpc_cred = clp->cl_cred, | |
2164 | }; | |
2165 | unsigned long now = jiffies; | |
2166 | int status; | |
2167 | ||
2168 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2169 | if (status < 0) | |
2170 | return status; | |
2171 | spin_lock(&clp->cl_lock); | |
2172 | if (time_before(clp->cl_last_renewal,now)) | |
2173 | clp->cl_last_renewal = now; | |
2174 | spin_unlock(&clp->cl_lock); | |
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | /* | |
2179 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2180 | * Until then, this open method is prone to inefficiency and race conditions | |
2181 | * due to the lookup, potential create, and open VFS calls from sys_open() | |
2182 | * placed on the wire. | |
2183 | */ | |
2184 | static int | |
2185 | nfs4_proc_file_open(struct inode *inode, struct file *filp) | |
2186 | { | |
2187 | struct dentry *dentry = filp->f_dentry; | |
2188 | struct nfs_open_context *ctx; | |
2189 | struct nfs4_state *state = NULL; | |
2190 | struct rpc_cred *cred; | |
2191 | int status = -ENOMEM; | |
2192 | ||
2193 | dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n", | |
2194 | (int)dentry->d_parent->d_name.len, | |
2195 | dentry->d_parent->d_name.name, | |
2196 | (int)dentry->d_name.len, dentry->d_name.name); | |
2197 | ||
2198 | ||
2199 | /* Find our open stateid */ | |
2200 | cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0); | |
2201 | if (IS_ERR(cred)) | |
2202 | return PTR_ERR(cred); | |
2203 | ctx = alloc_nfs_open_context(dentry, cred); | |
2204 | put_rpccred(cred); | |
2205 | if (unlikely(ctx == NULL)) | |
2206 | return -ENOMEM; | |
2207 | status = -EIO; /* ERACE actually */ | |
2208 | state = nfs4_find_state(inode, cred, filp->f_mode); | |
2209 | if (unlikely(state == NULL)) | |
2210 | goto no_state; | |
2211 | ctx->state = state; | |
2212 | nfs4_close_state(state, filp->f_mode); | |
2213 | ctx->mode = filp->f_mode; | |
2214 | nfs_file_set_open_context(filp, ctx); | |
2215 | put_nfs_open_context(ctx); | |
2216 | if (filp->f_mode & FMODE_WRITE) | |
2217 | nfs_begin_data_update(inode); | |
2218 | return 0; | |
2219 | no_state: | |
2220 | printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__); | |
2221 | put_nfs_open_context(ctx); | |
2222 | return status; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * Release our state | |
2227 | */ | |
2228 | static int | |
2229 | nfs4_proc_file_release(struct inode *inode, struct file *filp) | |
2230 | { | |
2231 | if (filp->f_mode & FMODE_WRITE) | |
2232 | nfs_end_data_update(inode); | |
2233 | nfs_file_clear_open_context(filp); | |
2234 | return 0; | |
2235 | } | |
2236 | ||
aa1870af BF |
2237 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2238 | { | |
2239 | return (server->caps & NFS_CAP_ACLS) | |
2240 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2241 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2242 | } | |
2243 | ||
2244 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2245 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2246 | * the stack. | |
2247 | */ | |
2248 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2249 | ||
2250 | static void buf_to_pages(const void *buf, size_t buflen, | |
2251 | struct page **pages, unsigned int *pgbase) | |
2252 | { | |
2253 | const void *p = buf; | |
2254 | ||
2255 | *pgbase = offset_in_page(buf); | |
2256 | p -= *pgbase; | |
2257 | while (p < buf + buflen) { | |
2258 | *(pages++) = virt_to_page(p); | |
2259 | p += PAGE_CACHE_SIZE; | |
2260 | } | |
2261 | } | |
2262 | ||
e50a1c2e BF |
2263 | struct nfs4_cached_acl { |
2264 | int cached; | |
2265 | size_t len; | |
3e9d4154 | 2266 | char data[0]; |
e50a1c2e BF |
2267 | }; |
2268 | ||
2269 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2270 | { | |
2271 | struct nfs_inode *nfsi = NFS_I(inode); | |
2272 | ||
2273 | spin_lock(&inode->i_lock); | |
2274 | kfree(nfsi->nfs4_acl); | |
2275 | nfsi->nfs4_acl = acl; | |
2276 | spin_unlock(&inode->i_lock); | |
2277 | } | |
2278 | ||
2279 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2280 | { | |
2281 | nfs4_set_cached_acl(inode, NULL); | |
2282 | } | |
2283 | ||
2284 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2285 | { | |
2286 | struct nfs_inode *nfsi = NFS_I(inode); | |
2287 | struct nfs4_cached_acl *acl; | |
2288 | int ret = -ENOENT; | |
2289 | ||
2290 | spin_lock(&inode->i_lock); | |
2291 | acl = nfsi->nfs4_acl; | |
2292 | if (acl == NULL) | |
2293 | goto out; | |
2294 | if (buf == NULL) /* user is just asking for length */ | |
2295 | goto out_len; | |
2296 | if (acl->cached == 0) | |
2297 | goto out; | |
2298 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2299 | if (acl->len > buflen) | |
2300 | goto out; | |
2301 | memcpy(buf, acl->data, acl->len); | |
2302 | out_len: | |
2303 | ret = acl->len; | |
2304 | out: | |
2305 | spin_unlock(&inode->i_lock); | |
2306 | return ret; | |
2307 | } | |
2308 | ||
2309 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2310 | { | |
2311 | struct nfs4_cached_acl *acl; | |
2312 | ||
2313 | if (buf && acl_len <= PAGE_SIZE) { | |
2314 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2315 | if (acl == NULL) | |
2316 | goto out; | |
2317 | acl->cached = 1; | |
2318 | memcpy(acl->data, buf, acl_len); | |
2319 | } else { | |
2320 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2321 | if (acl == NULL) | |
2322 | goto out; | |
2323 | acl->cached = 0; | |
2324 | } | |
2325 | acl->len = acl_len; | |
2326 | out: | |
2327 | nfs4_set_cached_acl(inode, acl); | |
2328 | } | |
2329 | ||
2330 | static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
aa1870af | 2331 | { |
aa1870af BF |
2332 | struct page *pages[NFS4ACL_MAXPAGES]; |
2333 | struct nfs_getaclargs args = { | |
2334 | .fh = NFS_FH(inode), | |
2335 | .acl_pages = pages, | |
2336 | .acl_len = buflen, | |
2337 | }; | |
2338 | size_t resp_len = buflen; | |
e50a1c2e | 2339 | void *resp_buf; |
aa1870af BF |
2340 | struct rpc_message msg = { |
2341 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2342 | .rpc_argp = &args, | |
2343 | .rpc_resp = &resp_len, | |
2344 | }; | |
e50a1c2e | 2345 | struct page *localpage = NULL; |
aa1870af BF |
2346 | int ret; |
2347 | ||
e50a1c2e BF |
2348 | if (buflen < PAGE_SIZE) { |
2349 | /* As long as we're doing a round trip to the server anyway, | |
2350 | * let's be prepared for a page of acl data. */ | |
2351 | localpage = alloc_page(GFP_KERNEL); | |
2352 | resp_buf = page_address(localpage); | |
2353 | if (localpage == NULL) | |
2354 | return -ENOMEM; | |
2355 | args.acl_pages[0] = localpage; | |
2356 | args.acl_pgbase = 0; | |
2357 | args.acl_len = PAGE_SIZE; | |
2358 | } else { | |
2359 | resp_buf = buf; | |
2360 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2361 | } | |
aa1870af | 2362 | ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0); |
e50a1c2e BF |
2363 | if (ret) |
2364 | goto out_free; | |
2365 | if (resp_len > args.acl_len) | |
2366 | nfs4_write_cached_acl(inode, NULL, resp_len); | |
2367 | else | |
2368 | nfs4_write_cached_acl(inode, resp_buf, resp_len); | |
2369 | if (buf) { | |
2370 | ret = -ERANGE; | |
2371 | if (resp_len > buflen) | |
2372 | goto out_free; | |
2373 | if (localpage) | |
2374 | memcpy(buf, resp_buf, resp_len); | |
2375 | } | |
2376 | ret = resp_len; | |
2377 | out_free: | |
2378 | if (localpage) | |
2379 | __free_page(localpage); | |
aa1870af BF |
2380 | return ret; |
2381 | } | |
2382 | ||
e50a1c2e BF |
2383 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
2384 | { | |
2385 | struct nfs_server *server = NFS_SERVER(inode); | |
2386 | int ret; | |
2387 | ||
2388 | if (!nfs4_server_supports_acls(server)) | |
2389 | return -EOPNOTSUPP; | |
2390 | ret = nfs_revalidate_inode(server, inode); | |
2391 | if (ret < 0) | |
2392 | return ret; | |
2393 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
2394 | if (ret != -ENOENT) | |
2395 | return ret; | |
2396 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
2397 | } | |
2398 | ||
4b580ee3 BF |
2399 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
2400 | { | |
2401 | struct nfs_server *server = NFS_SERVER(inode); | |
2402 | struct page *pages[NFS4ACL_MAXPAGES]; | |
2403 | struct nfs_setaclargs arg = { | |
2404 | .fh = NFS_FH(inode), | |
2405 | .acl_pages = pages, | |
2406 | .acl_len = buflen, | |
2407 | }; | |
2408 | struct rpc_message msg = { | |
2409 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
2410 | .rpc_argp = &arg, | |
2411 | .rpc_resp = NULL, | |
2412 | }; | |
2413 | int ret; | |
2414 | ||
2415 | if (!nfs4_server_supports_acls(server)) | |
2416 | return -EOPNOTSUPP; | |
2417 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); | |
2418 | ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0); | |
e50a1c2e BF |
2419 | if (ret == 0) |
2420 | nfs4_write_cached_acl(inode, buf, buflen); | |
4b580ee3 BF |
2421 | return ret; |
2422 | } | |
2423 | ||
1da177e4 | 2424 | static int |
faf5f49c | 2425 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server) |
1da177e4 LT |
2426 | { |
2427 | struct nfs4_client *clp = server->nfs4_state; | |
2428 | ||
2429 | if (!clp || task->tk_status >= 0) | |
2430 | return 0; | |
2431 | switch(task->tk_status) { | |
2432 | case -NFS4ERR_STALE_CLIENTID: | |
2433 | case -NFS4ERR_STALE_STATEID: | |
2434 | case -NFS4ERR_EXPIRED: | |
2435 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL); | |
2436 | nfs4_schedule_state_recovery(clp); | |
2437 | if (test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2438 | rpc_wake_up_task(task); | |
2439 | task->tk_status = 0; | |
2440 | return -EAGAIN; | |
2441 | case -NFS4ERR_GRACE: | |
2442 | case -NFS4ERR_DELAY: | |
2443 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
2444 | task->tk_status = 0; | |
2445 | return -EAGAIN; | |
2446 | case -NFS4ERR_OLD_STATEID: | |
2447 | task->tk_status = 0; | |
2448 | return -EAGAIN; | |
2449 | } | |
2450 | task->tk_status = nfs4_map_errors(task->tk_status); | |
2451 | return 0; | |
2452 | } | |
2453 | ||
2454 | static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp) | |
2455 | { | |
2456 | DEFINE_WAIT(wait); | |
2457 | sigset_t oldset; | |
2458 | int interruptible, res = 0; | |
2459 | ||
2460 | might_sleep(); | |
2461 | ||
2462 | rpc_clnt_sigmask(clnt, &oldset); | |
2463 | interruptible = TASK_UNINTERRUPTIBLE; | |
2464 | if (clnt->cl_intr) | |
2465 | interruptible = TASK_INTERRUPTIBLE; | |
2466 | prepare_to_wait(&clp->cl_waitq, &wait, interruptible); | |
2467 | nfs4_schedule_state_recovery(clp); | |
2468 | if (clnt->cl_intr && signalled()) | |
2469 | res = -ERESTARTSYS; | |
2470 | else if (!test_bit(NFS4CLNT_OK, &clp->cl_state)) | |
2471 | schedule(); | |
2472 | finish_wait(&clp->cl_waitq, &wait); | |
2473 | rpc_clnt_sigunmask(clnt, &oldset); | |
2474 | return res; | |
2475 | } | |
2476 | ||
2477 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
2478 | { | |
2479 | sigset_t oldset; | |
2480 | int res = 0; | |
2481 | ||
2482 | might_sleep(); | |
2483 | ||
2484 | if (*timeout <= 0) | |
2485 | *timeout = NFS4_POLL_RETRY_MIN; | |
2486 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
2487 | *timeout = NFS4_POLL_RETRY_MAX; | |
2488 | rpc_clnt_sigmask(clnt, &oldset); | |
2489 | if (clnt->cl_intr) { | |
041e0e3b | 2490 | schedule_timeout_interruptible(*timeout); |
1da177e4 LT |
2491 | if (signalled()) |
2492 | res = -ERESTARTSYS; | |
041e0e3b NA |
2493 | } else |
2494 | schedule_timeout_uninterruptible(*timeout); | |
1da177e4 LT |
2495 | rpc_clnt_sigunmask(clnt, &oldset); |
2496 | *timeout <<= 1; | |
2497 | return res; | |
2498 | } | |
2499 | ||
2500 | /* This is the error handling routine for processes that are allowed | |
2501 | * to sleep. | |
2502 | */ | |
faf5f49c | 2503 | int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) |
1da177e4 LT |
2504 | { |
2505 | struct nfs4_client *clp = server->nfs4_state; | |
2506 | int ret = errorcode; | |
2507 | ||
2508 | exception->retry = 0; | |
2509 | switch(errorcode) { | |
2510 | case 0: | |
2511 | return 0; | |
2512 | case -NFS4ERR_STALE_CLIENTID: | |
2513 | case -NFS4ERR_STALE_STATEID: | |
2514 | case -NFS4ERR_EXPIRED: | |
2515 | ret = nfs4_wait_clnt_recover(server->client, clp); | |
2516 | if (ret == 0) | |
2517 | exception->retry = 1; | |
2518 | break; | |
2519 | case -NFS4ERR_GRACE: | |
2520 | case -NFS4ERR_DELAY: | |
2521 | ret = nfs4_delay(server->client, &exception->timeout); | |
2522 | if (ret == 0) | |
2523 | exception->retry = 1; | |
2524 | break; | |
2525 | case -NFS4ERR_OLD_STATEID: | |
2526 | if (ret == 0) | |
2527 | exception->retry = 1; | |
2528 | } | |
2529 | /* We failed to handle the error */ | |
2530 | return nfs4_map_errors(ret); | |
2531 | } | |
2532 | ||
2533 | int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port) | |
2534 | { | |
2535 | nfs4_verifier sc_verifier; | |
2536 | struct nfs4_setclientid setclientid = { | |
2537 | .sc_verifier = &sc_verifier, | |
2538 | .sc_prog = program, | |
2539 | }; | |
2540 | struct rpc_message msg = { | |
2541 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
2542 | .rpc_argp = &setclientid, | |
2543 | .rpc_resp = clp, | |
2544 | .rpc_cred = clp->cl_cred, | |
2545 | }; | |
2546 | u32 *p; | |
2547 | int loop = 0; | |
2548 | int status; | |
2549 | ||
2550 | p = (u32*)sc_verifier.data; | |
2551 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
2552 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
2553 | ||
2554 | for(;;) { | |
2555 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
2556 | sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u", | |
2557 | clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr), | |
2558 | clp->cl_cred->cr_ops->cr_name, | |
2559 | clp->cl_id_uniquifier); | |
2560 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
2561 | sizeof(setclientid.sc_netid), "tcp"); | |
2562 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
2563 | sizeof(setclientid.sc_uaddr), "%s.%d.%d", | |
2564 | clp->cl_ipaddr, port >> 8, port & 255); | |
2565 | ||
2566 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2567 | if (status != -NFS4ERR_CLID_INUSE) | |
2568 | break; | |
2569 | if (signalled()) | |
2570 | break; | |
2571 | if (loop++ & 1) | |
2572 | ssleep(clp->cl_lease_time + 1); | |
2573 | else | |
2574 | if (++clp->cl_id_uniquifier == 0) | |
2575 | break; | |
2576 | } | |
2577 | return status; | |
2578 | } | |
2579 | ||
2580 | int | |
2581 | nfs4_proc_setclientid_confirm(struct nfs4_client *clp) | |
2582 | { | |
2583 | struct nfs_fsinfo fsinfo; | |
2584 | struct rpc_message msg = { | |
2585 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
2586 | .rpc_argp = clp, | |
2587 | .rpc_resp = &fsinfo, | |
2588 | .rpc_cred = clp->cl_cred, | |
2589 | }; | |
2590 | unsigned long now; | |
2591 | int status; | |
2592 | ||
2593 | now = jiffies; | |
2594 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2595 | if (status == 0) { | |
2596 | spin_lock(&clp->cl_lock); | |
2597 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
2598 | clp->cl_last_renewal = now; | |
2599 | spin_unlock(&clp->cl_lock); | |
2600 | } | |
2601 | return status; | |
2602 | } | |
2603 | ||
2604 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2605 | { | |
2606 | struct nfs4_delegreturnargs args = { | |
2607 | .fhandle = NFS_FH(inode), | |
2608 | .stateid = stateid, | |
2609 | }; | |
2610 | struct rpc_message msg = { | |
2611 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
2612 | .rpc_argp = &args, | |
2613 | .rpc_cred = cred, | |
2614 | }; | |
2615 | ||
2616 | return rpc_call_sync(NFS_CLIENT(inode), &msg, 0); | |
2617 | } | |
2618 | ||
2619 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid) | |
2620 | { | |
2621 | struct nfs_server *server = NFS_SERVER(inode); | |
2622 | struct nfs4_exception exception = { }; | |
2623 | int err; | |
2624 | do { | |
2625 | err = _nfs4_proc_delegreturn(inode, cred, stateid); | |
2626 | switch (err) { | |
2627 | case -NFS4ERR_STALE_STATEID: | |
2628 | case -NFS4ERR_EXPIRED: | |
2629 | nfs4_schedule_state_recovery(server->nfs4_state); | |
2630 | case 0: | |
2631 | return 0; | |
2632 | } | |
2633 | err = nfs4_handle_exception(server, err, &exception); | |
2634 | } while (exception.retry); | |
2635 | return err; | |
2636 | } | |
2637 | ||
2638 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
2639 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
2640 | ||
2641 | /* | |
2642 | * sleep, with exponential backoff, and retry the LOCK operation. | |
2643 | */ | |
2644 | static unsigned long | |
2645 | nfs4_set_lock_task_retry(unsigned long timeout) | |
2646 | { | |
041e0e3b | 2647 | schedule_timeout_interruptible(timeout); |
1da177e4 LT |
2648 | timeout <<= 1; |
2649 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
2650 | return NFS4_LOCK_MAXTIMEOUT; | |
2651 | return timeout; | |
2652 | } | |
2653 | ||
2654 | static inline int | |
2655 | nfs4_lck_type(int cmd, struct file_lock *request) | |
2656 | { | |
2657 | /* set lock type */ | |
2658 | switch (request->fl_type) { | |
2659 | case F_RDLCK: | |
2660 | return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT; | |
2661 | case F_WRLCK: | |
2662 | return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT; | |
2663 | case F_UNLCK: | |
2664 | return NFS4_WRITE_LT; | |
2665 | } | |
2666 | BUG(); | |
2667 | return 0; | |
2668 | } | |
2669 | ||
2670 | static inline uint64_t | |
2671 | nfs4_lck_length(struct file_lock *request) | |
2672 | { | |
2673 | if (request->fl_end == OFFSET_MAX) | |
2674 | return ~(uint64_t)0; | |
2675 | return request->fl_end - request->fl_start + 1; | |
2676 | } | |
2677 | ||
2678 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2679 | { | |
2680 | struct inode *inode = state->inode; | |
2681 | struct nfs_server *server = NFS_SERVER(inode); | |
2682 | struct nfs4_client *clp = server->nfs4_state; | |
2683 | struct nfs_lockargs arg = { | |
2684 | .fh = NFS_FH(inode), | |
2685 | .type = nfs4_lck_type(cmd, request), | |
2686 | .offset = request->fl_start, | |
2687 | .length = nfs4_lck_length(request), | |
2688 | }; | |
2689 | struct nfs_lockres res = { | |
2690 | .server = server, | |
2691 | }; | |
2692 | struct rpc_message msg = { | |
2693 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
2694 | .rpc_argp = &arg, | |
2695 | .rpc_resp = &res, | |
2696 | .rpc_cred = state->owner->so_cred, | |
2697 | }; | |
2698 | struct nfs_lowner nlo; | |
2699 | struct nfs4_lock_state *lsp; | |
2700 | int status; | |
2701 | ||
2702 | down_read(&clp->cl_sem); | |
2703 | nlo.clientid = clp->cl_clientid; | |
8d0a8a9d TM |
2704 | status = nfs4_set_lock_state(state, request); |
2705 | if (status != 0) | |
2706 | goto out; | |
2707 | lsp = request->fl_u.nfs4_fl.owner; | |
2708 | nlo.id = lsp->ls_id; | |
1da177e4 LT |
2709 | arg.u.lockt = &nlo; |
2710 | status = rpc_call_sync(server->client, &msg, 0); | |
2711 | if (!status) { | |
2712 | request->fl_type = F_UNLCK; | |
2713 | } else if (status == -NFS4ERR_DENIED) { | |
2714 | int64_t len, start, end; | |
2715 | start = res.u.denied.offset; | |
2716 | len = res.u.denied.length; | |
2717 | end = start + len - 1; | |
2718 | if (end < 0 || len == 0) | |
2719 | request->fl_end = OFFSET_MAX; | |
2720 | else | |
2721 | request->fl_end = (loff_t)end; | |
2722 | request->fl_start = (loff_t)start; | |
2723 | request->fl_type = F_WRLCK; | |
2724 | if (res.u.denied.type & 1) | |
2725 | request->fl_type = F_RDLCK; | |
2726 | request->fl_pid = 0; | |
2727 | status = 0; | |
2728 | } | |
8d0a8a9d | 2729 | out: |
1da177e4 LT |
2730 | up_read(&clp->cl_sem); |
2731 | return status; | |
2732 | } | |
2733 | ||
2734 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2735 | { | |
2736 | struct nfs4_exception exception = { }; | |
2737 | int err; | |
2738 | ||
2739 | do { | |
2740 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
2741 | _nfs4_proc_getlk(state, cmd, request), | |
2742 | &exception); | |
2743 | } while (exception.retry); | |
2744 | return err; | |
2745 | } | |
2746 | ||
2747 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
2748 | { | |
2749 | int res = 0; | |
2750 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
2751 | case FL_POSIX: | |
2752 | res = posix_lock_file_wait(file, fl); | |
2753 | break; | |
2754 | case FL_FLOCK: | |
2755 | res = flock_lock_file_wait(file, fl); | |
2756 | break; | |
2757 | default: | |
2758 | BUG(); | |
2759 | } | |
2760 | if (res < 0) | |
2761 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", | |
2762 | __FUNCTION__); | |
2763 | return res; | |
2764 | } | |
2765 | ||
faf5f49c TM |
2766 | struct nfs4_unlockdata { |
2767 | struct nfs_lockargs arg; | |
2768 | struct nfs_locku_opargs luargs; | |
2769 | struct nfs_lockres res; | |
2770 | struct nfs4_lock_state *lsp; | |
2771 | struct nfs_open_context *ctx; | |
2772 | atomic_t refcount; | |
2773 | struct completion completion; | |
2774 | }; | |
2775 | ||
2776 | static void nfs4_locku_release_calldata(struct nfs4_unlockdata *calldata) | |
1da177e4 | 2777 | { |
faf5f49c TM |
2778 | if (atomic_dec_and_test(&calldata->refcount)) { |
2779 | nfs_free_seqid(calldata->luargs.seqid); | |
2780 | nfs4_put_lock_state(calldata->lsp); | |
2781 | put_nfs_open_context(calldata->ctx); | |
2782 | kfree(calldata); | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | static void nfs4_locku_complete(struct nfs4_unlockdata *calldata) | |
2787 | { | |
2788 | complete(&calldata->completion); | |
2789 | nfs4_locku_release_calldata(calldata); | |
2790 | } | |
2791 | ||
2792 | static void nfs4_locku_done(struct rpc_task *task) | |
2793 | { | |
2794 | struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; | |
2795 | ||
2796 | nfs_increment_lock_seqid(task->tk_status, calldata->luargs.seqid); | |
2797 | switch (task->tk_status) { | |
2798 | case 0: | |
2799 | memcpy(calldata->lsp->ls_stateid.data, | |
2800 | calldata->res.u.stateid.data, | |
2801 | sizeof(calldata->lsp->ls_stateid.data)); | |
2802 | break; | |
2803 | case -NFS4ERR_STALE_STATEID: | |
2804 | case -NFS4ERR_EXPIRED: | |
2805 | nfs4_schedule_state_recovery(calldata->res.server->nfs4_state); | |
2806 | break; | |
2807 | default: | |
2808 | if (nfs4_async_handle_error(task, calldata->res.server) == -EAGAIN) { | |
2809 | rpc_restart_call(task); | |
2810 | return; | |
2811 | } | |
2812 | } | |
2813 | nfs4_locku_complete(calldata); | |
2814 | } | |
2815 | ||
2816 | static void nfs4_locku_begin(struct rpc_task *task) | |
2817 | { | |
2818 | struct nfs4_unlockdata *calldata = (struct nfs4_unlockdata *)task->tk_calldata; | |
1da177e4 LT |
2819 | struct rpc_message msg = { |
2820 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
faf5f49c TM |
2821 | .rpc_argp = &calldata->arg, |
2822 | .rpc_resp = &calldata->res, | |
2823 | .rpc_cred = calldata->lsp->ls_state->owner->so_cred, | |
1da177e4 | 2824 | }; |
faf5f49c TM |
2825 | int status; |
2826 | ||
2827 | status = nfs_wait_on_sequence(calldata->luargs.seqid, task); | |
2828 | if (status != 0) | |
2829 | return; | |
2830 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
2831 | nfs4_locku_complete(calldata); | |
2832 | task->tk_exit = NULL; | |
2833 | rpc_exit(task, 0); | |
2834 | return; | |
2835 | } | |
2836 | rpc_call_setup(task, &msg, 0); | |
2837 | } | |
2838 | ||
2839 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2840 | { | |
2841 | struct nfs4_unlockdata *calldata; | |
2842 | struct inode *inode = state->inode; | |
2843 | struct nfs_server *server = NFS_SERVER(inode); | |
1da177e4 | 2844 | struct nfs4_lock_state *lsp; |
8d0a8a9d | 2845 | int status; |
faf5f49c | 2846 | |
8d0a8a9d TM |
2847 | status = nfs4_set_lock_state(state, request); |
2848 | if (status != 0) | |
faf5f49c | 2849 | return status; |
8d0a8a9d | 2850 | lsp = request->fl_u.nfs4_fl.owner; |
1da177e4 | 2851 | /* We might have lost the locks! */ |
8d0a8a9d | 2852 | if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) |
faf5f49c TM |
2853 | return 0; |
2854 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); | |
2855 | if (calldata == NULL) | |
2856 | return -ENOMEM; | |
2857 | calldata->luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
2858 | if (calldata->luargs.seqid == NULL) { | |
2859 | kfree(calldata); | |
2860 | return -ENOMEM; | |
2861 | } | |
2862 | calldata->luargs.stateid = &lsp->ls_stateid; | |
2863 | calldata->arg.fh = NFS_FH(inode); | |
2864 | calldata->arg.type = nfs4_lck_type(cmd, request); | |
2865 | calldata->arg.offset = request->fl_start; | |
2866 | calldata->arg.length = nfs4_lck_length(request); | |
2867 | calldata->arg.u.locku = &calldata->luargs; | |
2868 | calldata->res.server = server; | |
2869 | calldata->lsp = lsp; | |
2870 | atomic_inc(&lsp->ls_count); | |
2871 | ||
2872 | /* Ensure we don't close file until we're done freeing locks! */ | |
2873 | calldata->ctx = get_nfs_open_context((struct nfs_open_context*)request->fl_file->private_data); | |
2874 | ||
2875 | atomic_set(&calldata->refcount, 2); | |
2876 | init_completion(&calldata->completion); | |
2877 | ||
2878 | status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_locku_begin, | |
2879 | nfs4_locku_done, calldata); | |
1da177e4 | 2880 | if (status == 0) |
faf5f49c TM |
2881 | wait_for_completion_interruptible(&calldata->completion); |
2882 | do_vfs_lock(request->fl_file, request); | |
2883 | nfs4_locku_release_calldata(calldata); | |
1da177e4 LT |
2884 | return status; |
2885 | } | |
2886 | ||
1da177e4 LT |
2887 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim) |
2888 | { | |
2889 | struct inode *inode = state->inode; | |
2890 | struct nfs_server *server = NFS_SERVER(inode); | |
8d0a8a9d | 2891 | struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; |
1da177e4 LT |
2892 | struct nfs_lockargs arg = { |
2893 | .fh = NFS_FH(inode), | |
2894 | .type = nfs4_lck_type(cmd, request), | |
2895 | .offset = request->fl_start, | |
2896 | .length = nfs4_lck_length(request), | |
2897 | }; | |
2898 | struct nfs_lockres res = { | |
2899 | .server = server, | |
2900 | }; | |
2901 | struct rpc_message msg = { | |
2902 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
2903 | .rpc_argp = &arg, | |
2904 | .rpc_resp = &res, | |
2905 | .rpc_cred = state->owner->so_cred, | |
2906 | }; | |
2907 | struct nfs_lock_opargs largs = { | |
2908 | .reclaim = reclaim, | |
2909 | .new_lock_owner = 0, | |
2910 | }; | |
cee54fc9 TM |
2911 | struct nfs_seqid *lock_seqid; |
2912 | int status = -ENOMEM; | |
1da177e4 | 2913 | |
cee54fc9 TM |
2914 | lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
2915 | if (lock_seqid == NULL) | |
2916 | return -ENOMEM; | |
2917 | if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) { | |
1da177e4 LT |
2918 | struct nfs4_state_owner *owner = state->owner; |
2919 | struct nfs_open_to_lock otl = { | |
2920 | .lock_owner = { | |
2921 | .clientid = server->nfs4_state->cl_clientid, | |
2922 | }, | |
2923 | }; | |
2924 | ||
cee54fc9 | 2925 | otl.lock_seqid = lock_seqid; |
1da177e4 LT |
2926 | otl.lock_owner.id = lsp->ls_id; |
2927 | memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid)); | |
2928 | largs.u.open_lock = &otl; | |
2929 | largs.new_lock_owner = 1; | |
2930 | arg.u.lock = &largs; | |
cee54fc9 TM |
2931 | otl.open_seqid = nfs_alloc_seqid(&owner->so_seqid); |
2932 | if (otl.open_seqid != NULL) { | |
2933 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); | |
2934 | /* increment seqid on success, and seqid mutating errors */ | |
2935 | nfs_increment_open_seqid(status, otl.open_seqid); | |
2936 | nfs_free_seqid(otl.open_seqid); | |
8d0a8a9d | 2937 | } |
cee54fc9 TM |
2938 | if (status == 0) |
2939 | nfs_confirm_seqid(&lsp->ls_seqid, 0); | |
1da177e4 | 2940 | } else { |
cee54fc9 | 2941 | struct nfs_exist_lock el; |
1da177e4 LT |
2942 | memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid)); |
2943 | largs.u.exist_lock = ⪙ | |
1da177e4 | 2944 | arg.u.lock = &largs; |
cee54fc9 | 2945 | el.seqid = lock_seqid; |
1da177e4 LT |
2946 | status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR); |
2947 | } | |
cee54fc9 TM |
2948 | /* increment seqid on success, and seqid mutating errors*/ |
2949 | nfs_increment_lock_seqid(status, lock_seqid); | |
1da177e4 | 2950 | /* save the returned stateid. */ |
cee54fc9 TM |
2951 | if (status == 0) { |
2952 | memcpy(lsp->ls_stateid.data, res.u.stateid.data, sizeof(lsp->ls_stateid.data)); | |
2953 | lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
2954 | } else if (status == -NFS4ERR_DENIED) | |
1da177e4 | 2955 | status = -EAGAIN; |
cee54fc9 | 2956 | nfs_free_seqid(lock_seqid); |
1da177e4 LT |
2957 | return status; |
2958 | } | |
2959 | ||
2960 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
2961 | { | |
202b50dc TM |
2962 | struct nfs_server *server = NFS_SERVER(state->inode); |
2963 | struct nfs4_exception exception = { }; | |
2964 | int err; | |
2965 | ||
2966 | do { | |
2967 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
2968 | if (err != -NFS4ERR_DELAY) | |
2969 | break; | |
2970 | nfs4_handle_exception(server, err, &exception); | |
2971 | } while (exception.retry); | |
2972 | return err; | |
1da177e4 LT |
2973 | } |
2974 | ||
2975 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
2976 | { | |
202b50dc TM |
2977 | struct nfs_server *server = NFS_SERVER(state->inode); |
2978 | struct nfs4_exception exception = { }; | |
2979 | int err; | |
2980 | ||
2981 | do { | |
2982 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
2983 | if (err != -NFS4ERR_DELAY) | |
2984 | break; | |
2985 | nfs4_handle_exception(server, err, &exception); | |
2986 | } while (exception.retry); | |
2987 | return err; | |
1da177e4 LT |
2988 | } |
2989 | ||
2990 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
2991 | { | |
2992 | struct nfs4_client *clp = state->owner->so_client; | |
2993 | int status; | |
2994 | ||
2995 | down_read(&clp->cl_sem); | |
8d0a8a9d TM |
2996 | status = nfs4_set_lock_state(state, request); |
2997 | if (status == 0) | |
2998 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
1da177e4 LT |
2999 | if (status == 0) { |
3000 | /* Note: we always want to sleep here! */ | |
3001 | request->fl_flags |= FL_SLEEP; | |
3002 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3003 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__); | |
3004 | } | |
3005 | up_read(&clp->cl_sem); | |
3006 | return status; | |
3007 | } | |
3008 | ||
3009 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3010 | { | |
3011 | struct nfs4_exception exception = { }; | |
3012 | int err; | |
3013 | ||
3014 | do { | |
3015 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3016 | _nfs4_proc_setlk(state, cmd, request), | |
3017 | &exception); | |
3018 | } while (exception.retry); | |
3019 | return err; | |
3020 | } | |
3021 | ||
3022 | static int | |
3023 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3024 | { | |
3025 | struct nfs_open_context *ctx; | |
3026 | struct nfs4_state *state; | |
3027 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3028 | int status; | |
3029 | ||
3030 | /* verify open state */ | |
3031 | ctx = (struct nfs_open_context *)filp->private_data; | |
3032 | state = ctx->state; | |
3033 | ||
3034 | if (request->fl_start < 0 || request->fl_end < 0) | |
3035 | return -EINVAL; | |
3036 | ||
3037 | if (IS_GETLK(cmd)) | |
3038 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3039 | ||
3040 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3041 | return -EINVAL; | |
3042 | ||
3043 | if (request->fl_type == F_UNLCK) | |
3044 | return nfs4_proc_unlck(state, cmd, request); | |
3045 | ||
3046 | do { | |
3047 | status = nfs4_proc_setlk(state, cmd, request); | |
3048 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3049 | break; | |
3050 | timeout = nfs4_set_lock_task_retry(timeout); | |
3051 | status = -ERESTARTSYS; | |
3052 | if (signalled()) | |
3053 | break; | |
3054 | } while(status < 0); | |
1da177e4 LT |
3055 | return status; |
3056 | } | |
3057 | ||
6b3b5496 | 3058 | |
aa1870af BF |
3059 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3060 | ||
6b3b5496 BF |
3061 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3062 | size_t buflen, int flags) | |
3063 | { | |
4b580ee3 BF |
3064 | struct inode *inode = dentry->d_inode; |
3065 | ||
3066 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3067 | return -EOPNOTSUPP; | |
3068 | ||
3069 | if (!S_ISREG(inode->i_mode) && | |
3070 | (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX)) | |
3071 | return -EPERM; | |
3072 | ||
3073 | return nfs4_proc_set_acl(inode, buf, buflen); | |
6b3b5496 BF |
3074 | } |
3075 | ||
3076 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3077 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3078 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3079 | * attributes in kernel-managed attribute namespaces. */ | |
3080 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3081 | size_t buflen) | |
3082 | { | |
aa1870af BF |
3083 | struct inode *inode = dentry->d_inode; |
3084 | ||
3085 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3086 | return -EOPNOTSUPP; | |
3087 | ||
3088 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3089 | } |
3090 | ||
3091 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3092 | { | |
aa1870af | 3093 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 BF |
3094 | |
3095 | if (buf && buflen < len) | |
3096 | return -ERANGE; | |
3097 | if (buf) | |
aa1870af BF |
3098 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3099 | return len; | |
6b3b5496 BF |
3100 | } |
3101 | ||
1da177e4 LT |
3102 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
3103 | .recover_open = nfs4_open_reclaim, | |
3104 | .recover_lock = nfs4_lock_reclaim, | |
3105 | }; | |
3106 | ||
3107 | struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = { | |
3108 | .recover_open = nfs4_open_expired, | |
3109 | .recover_lock = nfs4_lock_expired, | |
3110 | }; | |
3111 | ||
6b3b5496 BF |
3112 | static struct inode_operations nfs4_file_inode_operations = { |
3113 | .permission = nfs_permission, | |
3114 | .getattr = nfs_getattr, | |
3115 | .setattr = nfs_setattr, | |
3116 | .getxattr = nfs4_getxattr, | |
3117 | .setxattr = nfs4_setxattr, | |
3118 | .listxattr = nfs4_listxattr, | |
3119 | }; | |
3120 | ||
1da177e4 LT |
3121 | struct nfs_rpc_ops nfs_v4_clientops = { |
3122 | .version = 4, /* protocol version */ | |
3123 | .dentry_ops = &nfs4_dentry_operations, | |
3124 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 3125 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
3126 | .getroot = nfs4_proc_get_root, |
3127 | .getattr = nfs4_proc_getattr, | |
3128 | .setattr = nfs4_proc_setattr, | |
3129 | .lookup = nfs4_proc_lookup, | |
3130 | .access = nfs4_proc_access, | |
3131 | .readlink = nfs4_proc_readlink, | |
3132 | .read = nfs4_proc_read, | |
3133 | .write = nfs4_proc_write, | |
3134 | .commit = nfs4_proc_commit, | |
3135 | .create = nfs4_proc_create, | |
3136 | .remove = nfs4_proc_remove, | |
3137 | .unlink_setup = nfs4_proc_unlink_setup, | |
3138 | .unlink_done = nfs4_proc_unlink_done, | |
3139 | .rename = nfs4_proc_rename, | |
3140 | .link = nfs4_proc_link, | |
3141 | .symlink = nfs4_proc_symlink, | |
3142 | .mkdir = nfs4_proc_mkdir, | |
3143 | .rmdir = nfs4_proc_remove, | |
3144 | .readdir = nfs4_proc_readdir, | |
3145 | .mknod = nfs4_proc_mknod, | |
3146 | .statfs = nfs4_proc_statfs, | |
3147 | .fsinfo = nfs4_proc_fsinfo, | |
3148 | .pathconf = nfs4_proc_pathconf, | |
3149 | .decode_dirent = nfs4_decode_dirent, | |
3150 | .read_setup = nfs4_proc_read_setup, | |
3151 | .write_setup = nfs4_proc_write_setup, | |
3152 | .commit_setup = nfs4_proc_commit_setup, | |
3153 | .file_open = nfs4_proc_file_open, | |
3154 | .file_release = nfs4_proc_file_release, | |
3155 | .lock = nfs4_proc_lock, | |
e50a1c2e | 3156 | .clear_acl_cache = nfs4_zap_acl_attr, |
1da177e4 LT |
3157 | }; |
3158 | ||
3159 | /* | |
3160 | * Local variables: | |
3161 | * c-basic-offset: 8 | |
3162 | * End: | |
3163 | */ |