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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
39 | #include <linux/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
02a913a7 | 50 | #include <linux/mount.h> |
1da177e4 | 51 | |
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 | 53 | #include "delegation.h" |
101070ca | 54 | #include "internal.h" |
006ea73e | 55 | #include "iostat.h" |
1da177e4 LT |
56 | |
57 | #define NFSDBG_FACILITY NFSDBG_PROC | |
58 | ||
2066fe89 | 59 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
60 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
61 | ||
cdd4e68b | 62 | struct nfs4_opendata; |
864472e9 | 63 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 64 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 65 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
66 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
67 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
1da177e4 | 68 | |
1da177e4 | 69 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 70 | static int nfs4_map_errors(int err) |
1da177e4 LT |
71 | { |
72 | if (err < -1000) { | |
73 | dprintk("%s could not handle NFSv4 error %d\n", | |
3110ff80 | 74 | __func__, -err); |
1da177e4 LT |
75 | return -EIO; |
76 | } | |
77 | return err; | |
78 | } | |
79 | ||
80 | /* | |
81 | * This is our standard bitmap for GETATTR requests. | |
82 | */ | |
83 | const u32 nfs4_fattr_bitmap[2] = { | |
84 | FATTR4_WORD0_TYPE | |
85 | | FATTR4_WORD0_CHANGE | |
86 | | FATTR4_WORD0_SIZE | |
87 | | FATTR4_WORD0_FSID | |
88 | | FATTR4_WORD0_FILEID, | |
89 | FATTR4_WORD1_MODE | |
90 | | FATTR4_WORD1_NUMLINKS | |
91 | | FATTR4_WORD1_OWNER | |
92 | | FATTR4_WORD1_OWNER_GROUP | |
93 | | FATTR4_WORD1_RAWDEV | |
94 | | FATTR4_WORD1_SPACE_USED | |
95 | | FATTR4_WORD1_TIME_ACCESS | |
96 | | FATTR4_WORD1_TIME_METADATA | |
97 | | FATTR4_WORD1_TIME_MODIFY | |
98 | }; | |
99 | ||
100 | const u32 nfs4_statfs_bitmap[2] = { | |
101 | FATTR4_WORD0_FILES_AVAIL | |
102 | | FATTR4_WORD0_FILES_FREE | |
103 | | FATTR4_WORD0_FILES_TOTAL, | |
104 | FATTR4_WORD1_SPACE_AVAIL | |
105 | | FATTR4_WORD1_SPACE_FREE | |
106 | | FATTR4_WORD1_SPACE_TOTAL | |
107 | }; | |
108 | ||
4ce79717 | 109 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
110 | FATTR4_WORD0_MAXLINK |
111 | | FATTR4_WORD0_MAXNAME, | |
112 | 0 | |
113 | }; | |
114 | ||
115 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
116 | | FATTR4_WORD0_MAXREAD | |
117 | | FATTR4_WORD0_MAXWRITE | |
118 | | FATTR4_WORD0_LEASE_TIME, | |
119 | 0 | |
120 | }; | |
121 | ||
830b8e33 MN |
122 | const u32 nfs4_fs_locations_bitmap[2] = { |
123 | FATTR4_WORD0_TYPE | |
124 | | FATTR4_WORD0_CHANGE | |
125 | | FATTR4_WORD0_SIZE | |
126 | | FATTR4_WORD0_FSID | |
127 | | FATTR4_WORD0_FILEID | |
128 | | FATTR4_WORD0_FS_LOCATIONS, | |
129 | FATTR4_WORD1_MODE | |
130 | | FATTR4_WORD1_NUMLINKS | |
131 | | FATTR4_WORD1_OWNER | |
132 | | FATTR4_WORD1_OWNER_GROUP | |
133 | | FATTR4_WORD1_RAWDEV | |
134 | | FATTR4_WORD1_SPACE_USED | |
135 | | FATTR4_WORD1_TIME_ACCESS | |
136 | | FATTR4_WORD1_TIME_METADATA | |
137 | | FATTR4_WORD1_TIME_MODIFY | |
138 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
139 | }; | |
140 | ||
bc4785cd | 141 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
142 | struct nfs4_readdir_arg *readdir) |
143 | { | |
0dbb4c67 | 144 | __be32 *start, *p; |
1da177e4 LT |
145 | |
146 | BUG_ON(readdir->count < 80); | |
147 | if (cookie > 2) { | |
b7ef1956 | 148 | readdir->cookie = cookie; |
1da177e4 LT |
149 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
150 | return; | |
151 | } | |
152 | ||
153 | readdir->cookie = 0; | |
154 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
155 | if (cookie == 2) | |
156 | return; | |
157 | ||
158 | /* | |
159 | * NFSv4 servers do not return entries for '.' and '..' | |
160 | * Therefore, we fake these entries here. We let '.' | |
161 | * have cookie 0 and '..' have cookie 1. Note that | |
162 | * when talking to the server, we always send cookie 0 | |
163 | * instead of 1 or 2. | |
164 | */ | |
0dbb4c67 | 165 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
166 | |
167 | if (cookie == 0) { | |
168 | *p++ = xdr_one; /* next */ | |
169 | *p++ = xdr_zero; /* cookie, first word */ | |
170 | *p++ = xdr_one; /* cookie, second word */ | |
171 | *p++ = xdr_one; /* entry len */ | |
172 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
173 | p++; | |
174 | *p++ = xdr_one; /* bitmap length */ | |
175 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
176 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 177 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
178 | } |
179 | ||
180 | *p++ = xdr_one; /* next */ | |
181 | *p++ = xdr_zero; /* cookie, first word */ | |
182 | *p++ = xdr_two; /* cookie, second word */ | |
183 | *p++ = xdr_two; /* entry len */ | |
184 | memcpy(p, "..\0\0", 4); /* entry */ | |
185 | p++; | |
186 | *p++ = xdr_one; /* bitmap length */ | |
187 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
188 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 189 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
190 | |
191 | readdir->pgbase = (char *)p - (char *)start; | |
192 | readdir->count -= readdir->pgbase; | |
193 | kunmap_atomic(start, KM_USER0); | |
194 | } | |
195 | ||
65de872e TM |
196 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
197 | { | |
198 | int res; | |
199 | ||
200 | might_sleep(); | |
201 | ||
e005e804 | 202 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 203 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
204 | return res; |
205 | } | |
206 | ||
207 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
208 | { | |
209 | int res = 0; | |
210 | ||
211 | might_sleep(); | |
212 | ||
213 | if (*timeout <= 0) | |
214 | *timeout = NFS4_POLL_RETRY_MIN; | |
215 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
216 | *timeout = NFS4_POLL_RETRY_MAX; | |
217 | schedule_timeout_killable(*timeout); | |
218 | if (fatal_signal_pending(current)) | |
219 | res = -ERESTARTSYS; | |
220 | *timeout <<= 1; | |
221 | return res; | |
222 | } | |
223 | ||
224 | /* This is the error handling routine for processes that are allowed | |
225 | * to sleep. | |
226 | */ | |
227 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
228 | { | |
229 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 230 | struct nfs4_state *state = exception->state; |
65de872e TM |
231 | int ret = errorcode; |
232 | ||
233 | exception->retry = 0; | |
234 | switch(errorcode) { | |
235 | case 0: | |
236 | return 0; | |
9e33bed5 TM |
237 | case -NFS4ERR_ADMIN_REVOKED: |
238 | case -NFS4ERR_BAD_STATEID: | |
239 | case -NFS4ERR_OPENMODE: | |
240 | if (state == NULL) | |
241 | break; | |
242 | nfs4_state_mark_reclaim_nograce(clp, state); | |
65de872e TM |
243 | case -NFS4ERR_STALE_CLIENTID: |
244 | case -NFS4ERR_STALE_STATEID: | |
245 | case -NFS4ERR_EXPIRED: | |
246 | nfs4_schedule_state_recovery(clp); | |
247 | ret = nfs4_wait_clnt_recover(clp); | |
248 | if (ret == 0) | |
249 | exception->retry = 1; | |
250 | break; | |
251 | case -NFS4ERR_FILE_OPEN: | |
252 | case -NFS4ERR_GRACE: | |
253 | case -NFS4ERR_DELAY: | |
254 | ret = nfs4_delay(server->client, &exception->timeout); | |
255 | if (ret != 0) | |
256 | break; | |
257 | case -NFS4ERR_OLD_STATEID: | |
258 | exception->retry = 1; | |
259 | } | |
260 | /* We failed to handle the error */ | |
261 | return nfs4_map_errors(ret); | |
262 | } | |
263 | ||
264 | ||
26e976a8 | 265 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 266 | { |
7539bbab | 267 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
268 | spin_lock(&clp->cl_lock); |
269 | if (time_before(clp->cl_last_renewal,timestamp)) | |
270 | clp->cl_last_renewal = timestamp; | |
271 | spin_unlock(&clp->cl_lock); | |
272 | } | |
273 | ||
cccef3b9 AA |
274 | #if defined(CONFIG_NFS_V4_1) |
275 | ||
510b8175 BH |
276 | /* |
277 | * nfs4_find_slot - efficiently look for a free slot | |
278 | * | |
279 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
280 | * If found, we mark the slot as used, update the highest_used_slotid, | |
281 | * and respectively set up the sequence operation args. | |
282 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
283 | * |
284 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
285 | */ |
286 | static u8 | |
287 | nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task) | |
288 | { | |
289 | int slotid; | |
290 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
291 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
292 | ||
510b8175 BH |
293 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
294 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
295 | tbl->max_slots); | |
296 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
297 | if (slotid >= tbl->max_slots) | |
298 | goto out; | |
299 | __set_bit(slotid, tbl->used_slots); | |
300 | if (slotid > tbl->highest_used_slotid) | |
301 | tbl->highest_used_slotid = slotid; | |
302 | ret_id = slotid; | |
303 | out: | |
304 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
305 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
306 | return ret_id; |
307 | } | |
308 | ||
ce5039c1 AA |
309 | static int nfs41_setup_sequence(struct nfs4_session *session, |
310 | struct nfs4_sequence_args *args, | |
311 | struct nfs4_sequence_res *res, | |
312 | int cache_reply, | |
313 | struct rpc_task *task) | |
314 | { | |
fbcd4abc AA |
315 | struct nfs4_slot *slot; |
316 | struct nfs4_slot_table *tbl; | |
317 | u8 slotid; | |
318 | ||
319 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
320 | /* slot already allocated? */ |
321 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
322 | return 0; | |
323 | ||
324 | memset(res, 0, sizeof(*res)); | |
325 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
fbcd4abc AA |
326 | tbl = &session->fc_slot_table; |
327 | ||
328 | spin_lock(&tbl->slot_tbl_lock); | |
329 | slotid = nfs4_find_slot(tbl, task); | |
330 | if (slotid == NFS4_MAX_SLOT_TABLE) { | |
331 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
332 | spin_unlock(&tbl->slot_tbl_lock); | |
333 | dprintk("<-- %s: no free slots\n", __func__); | |
334 | return -EAGAIN; | |
335 | } | |
336 | spin_unlock(&tbl->slot_tbl_lock); | |
337 | ||
338 | slot = tbl->slots + slotid; | |
339 | args->sa_slotid = slotid; | |
340 | args->sa_cache_this = cache_reply; | |
341 | ||
342 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
343 | ||
344 | res->sr_slotid = slotid; | |
345 | res->sr_renewal_time = jiffies; | |
346 | /* | |
347 | * sr_status is only set in decode_sequence, and so will remain | |
348 | * set to 1 if an rpc level failure occurs. | |
349 | */ | |
350 | res->sr_status = 1; | |
ce5039c1 AA |
351 | return 0; |
352 | } | |
353 | ||
354 | int nfs4_setup_sequence(struct nfs_client *clp, | |
355 | struct nfs4_sequence_args *args, | |
356 | struct nfs4_sequence_res *res, | |
357 | int cache_reply, | |
358 | struct rpc_task *task) | |
359 | { | |
360 | int ret = 0; | |
361 | ||
362 | dprintk("--> %s clp %p session %p sr_slotid %d\n", | |
363 | __func__, clp, clp->cl_session, res->sr_slotid); | |
364 | ||
365 | if (!nfs4_has_session(clp)) | |
366 | goto out; | |
367 | ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, | |
368 | task); | |
369 | if (ret != -EAGAIN) { | |
370 | /* terminate rpc task */ | |
371 | task->tk_status = ret; | |
372 | task->tk_action = NULL; | |
373 | } | |
374 | out: | |
375 | dprintk("<-- %s status=%d\n", __func__, ret); | |
376 | return ret; | |
377 | } | |
378 | ||
379 | struct nfs41_call_sync_data { | |
380 | struct nfs_client *clp; | |
381 | struct nfs4_sequence_args *seq_args; | |
382 | struct nfs4_sequence_res *seq_res; | |
383 | int cache_reply; | |
384 | }; | |
385 | ||
386 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
387 | { | |
388 | struct nfs41_call_sync_data *data = calldata; | |
389 | ||
390 | dprintk("--> %s data->clp->cl_session %p\n", __func__, | |
391 | data->clp->cl_session); | |
392 | if (nfs4_setup_sequence(data->clp, data->seq_args, | |
393 | data->seq_res, data->cache_reply, task)) | |
394 | return; | |
395 | rpc_call_start(task); | |
396 | } | |
397 | ||
398 | struct rpc_call_ops nfs41_call_sync_ops = { | |
399 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
400 | }; | |
401 | ||
402 | static int nfs4_call_sync_sequence(struct nfs_client *clp, | |
403 | struct rpc_clnt *clnt, | |
404 | struct rpc_message *msg, | |
405 | struct nfs4_sequence_args *args, | |
406 | struct nfs4_sequence_res *res, | |
407 | int cache_reply) | |
408 | { | |
409 | int ret; | |
410 | struct rpc_task *task; | |
411 | struct nfs41_call_sync_data data = { | |
412 | .clp = clp, | |
413 | .seq_args = args, | |
414 | .seq_res = res, | |
415 | .cache_reply = cache_reply, | |
416 | }; | |
417 | struct rpc_task_setup task_setup = { | |
418 | .rpc_client = clnt, | |
419 | .rpc_message = msg, | |
420 | .callback_ops = &nfs41_call_sync_ops, | |
421 | .callback_data = &data | |
422 | }; | |
423 | ||
424 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
425 | task = rpc_run_task(&task_setup); | |
426 | if (IS_ERR(task)) | |
427 | ret = PTR_ERR(task); | |
428 | else { | |
429 | ret = task->tk_status; | |
430 | rpc_put_task(task); | |
431 | } | |
432 | return ret; | |
433 | } | |
434 | ||
cccef3b9 AA |
435 | int _nfs4_call_sync_session(struct nfs_server *server, |
436 | struct rpc_message *msg, | |
437 | struct nfs4_sequence_args *args, | |
438 | struct nfs4_sequence_res *res, | |
439 | int cache_reply) | |
440 | { | |
ce5039c1 AA |
441 | return nfs4_call_sync_sequence(server->nfs_client, server->client, |
442 | msg, args, res, cache_reply); | |
cccef3b9 AA |
443 | } |
444 | ||
445 | #endif /* CONFIG_NFS_V4_1 */ | |
446 | ||
447 | int _nfs4_call_sync(struct nfs_server *server, | |
448 | struct rpc_message *msg, | |
449 | struct nfs4_sequence_args *args, | |
450 | struct nfs4_sequence_res *res, | |
451 | int cache_reply) | |
452 | { | |
f3752975 | 453 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
454 | return rpc_call_sync(server->client, msg, 0); |
455 | } | |
456 | ||
457 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
458 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
459 | &(res)->seq_res, (cache_reply)) | |
460 | ||
38478b24 | 461 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 462 | { |
38478b24 | 463 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 464 | |
38478b24 | 465 | spin_lock(&dir->i_lock); |
40d24704 TM |
466 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
467 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 468 | nfs_force_lookup_revalidate(dir); |
40d24704 | 469 | nfsi->change_attr = cinfo->after; |
38478b24 | 470 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
471 | } |
472 | ||
e56e0b78 | 473 | struct nfs4_opendata { |
c6d00e63 | 474 | struct kref kref; |
e56e0b78 TM |
475 | struct nfs_openargs o_arg; |
476 | struct nfs_openres o_res; | |
cdd4e68b TM |
477 | struct nfs_open_confirmargs c_arg; |
478 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
479 | struct nfs_fattr f_attr; |
480 | struct nfs_fattr dir_attr; | |
ad389da7 | 481 | struct path path; |
e56e0b78 TM |
482 | struct dentry *dir; |
483 | struct nfs4_state_owner *owner; | |
aac00a8d | 484 | struct nfs4_state *state; |
e56e0b78 | 485 | struct iattr attrs; |
26e976a8 | 486 | unsigned long timestamp; |
3e309914 | 487 | unsigned int rpc_done : 1; |
24ac23ab TM |
488 | int rpc_status; |
489 | int cancelled; | |
e56e0b78 TM |
490 | }; |
491 | ||
2ced46c2 TM |
492 | |
493 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
494 | { | |
495 | p->o_res.f_attr = &p->f_attr; | |
496 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
497 | p->o_res.seqid = p->o_arg.seqid; |
498 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
499 | p->o_res.server = p->o_arg.server; |
500 | nfs_fattr_init(&p->f_attr); | |
501 | nfs_fattr_init(&p->dir_attr); | |
502 | } | |
503 | ||
ad389da7 | 504 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 505 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
506 | const struct iattr *attrs) |
507 | { | |
ad389da7 | 508 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
509 | struct inode *dir = parent->d_inode; |
510 | struct nfs_server *server = NFS_SERVER(dir); | |
511 | struct nfs4_opendata *p; | |
512 | ||
513 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
514 | if (p == NULL) | |
515 | goto err; | |
516 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
517 | if (p->o_arg.seqid == NULL) | |
518 | goto err_free; | |
ad389da7 TM |
519 | p->path.mnt = mntget(path->mnt); |
520 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
521 | p->dir = parent; |
522 | p->owner = sp; | |
523 | atomic_inc(&sp->so_count); | |
524 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
525 | p->o_arg.open_flags = flags; |
526 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 527 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 528 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 529 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
530 | p->o_arg.server = server; |
531 | p->o_arg.bitmask = server->attr_bitmask; | |
532 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
5f7dbd5c | 533 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
e56e0b78 TM |
534 | if (flags & O_EXCL) { |
535 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
536 | s[0] = jiffies; | |
537 | s[1] = current->pid; | |
538 | } else if (flags & O_CREAT) { | |
539 | p->o_arg.u.attrs = &p->attrs; | |
540 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
541 | } | |
cdd4e68b TM |
542 | p->c_arg.fh = &p->o_res.fh; |
543 | p->c_arg.stateid = &p->o_res.stateid; | |
544 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 545 | nfs4_init_opendata_res(p); |
c6d00e63 | 546 | kref_init(&p->kref); |
e56e0b78 TM |
547 | return p; |
548 | err_free: | |
549 | kfree(p); | |
550 | err: | |
551 | dput(parent); | |
552 | return NULL; | |
553 | } | |
554 | ||
c6d00e63 | 555 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 556 | { |
c6d00e63 TM |
557 | struct nfs4_opendata *p = container_of(kref, |
558 | struct nfs4_opendata, kref); | |
559 | ||
560 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
561 | if (p->state != NULL) |
562 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
563 | nfs4_put_state_owner(p->owner); |
564 | dput(p->dir); | |
31f31db1 | 565 | path_put(&p->path); |
c6d00e63 TM |
566 | kfree(p); |
567 | } | |
568 | ||
569 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
570 | { | |
571 | if (p != NULL) | |
572 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
573 | } |
574 | ||
06f814a3 TM |
575 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
576 | { | |
06f814a3 TM |
577 | int ret; |
578 | ||
06f814a3 | 579 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
580 | return ret; |
581 | } | |
582 | ||
dc0b027d | 583 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
584 | { |
585 | int ret = 0; | |
dc0b027d TM |
586 | |
587 | if (open_mode & O_EXCL) | |
588 | goto out; | |
589 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
590 | case FMODE_READ: |
591 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
592 | break; |
593 | case FMODE_WRITE: | |
594 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
595 | break; |
596 | case FMODE_READ|FMODE_WRITE: | |
597 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
598 | } | |
dc0b027d | 599 | out: |
6ee41268 TM |
600 | return ret; |
601 | } | |
602 | ||
dc0b027d | 603 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 604 | { |
dc0b027d | 605 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 606 | return 0; |
15c831bf | 607 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 608 | return 0; |
b7391f44 | 609 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
610 | return 1; |
611 | } | |
612 | ||
dc0b027d | 613 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 614 | { |
dc0b027d | 615 | switch (fmode) { |
e7616923 TM |
616 | case FMODE_WRITE: |
617 | state->n_wronly++; | |
618 | break; | |
619 | case FMODE_READ: | |
620 | state->n_rdonly++; | |
621 | break; | |
622 | case FMODE_READ|FMODE_WRITE: | |
623 | state->n_rdwr++; | |
624 | } | |
dc0b027d | 625 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
626 | } |
627 | ||
dc0b027d | 628 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
629 | { |
630 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
631 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
632 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 633 | switch (fmode) { |
003707c7 TM |
634 | case FMODE_READ: |
635 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
636 | break; | |
637 | case FMODE_WRITE: | |
638 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
639 | break; | |
640 | case FMODE_READ|FMODE_WRITE: | |
641 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
642 | } | |
e7616923 TM |
643 | } |
644 | ||
dc0b027d | 645 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 646 | { |
8bda4e4c | 647 | write_seqlock(&state->seqlock); |
dc0b027d | 648 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 649 | write_sequnlock(&state->seqlock); |
003707c7 TM |
650 | } |
651 | ||
dc0b027d | 652 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 653 | { |
8bda4e4c TM |
654 | /* |
655 | * Protect the call to nfs4_state_set_mode_locked and | |
656 | * serialise the stateid update | |
657 | */ | |
658 | write_seqlock(&state->seqlock); | |
003707c7 TM |
659 | if (deleg_stateid != NULL) { |
660 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
661 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
662 | } | |
663 | if (open_stateid != NULL) | |
dc0b027d | 664 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
665 | write_sequnlock(&state->seqlock); |
666 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 667 | update_open_stateflags(state, fmode); |
ec073428 | 668 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
669 | } |
670 | ||
dc0b027d | 671 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
672 | { |
673 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
674 | struct nfs_delegation *deleg_cur; | |
675 | int ret = 0; | |
676 | ||
dc0b027d | 677 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
678 | |
679 | rcu_read_lock(); | |
680 | deleg_cur = rcu_dereference(nfsi->delegation); | |
681 | if (deleg_cur == NULL) | |
682 | goto no_delegation; | |
683 | ||
684 | spin_lock(&deleg_cur->lock); | |
685 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 686 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
687 | goto no_delegation_unlock; |
688 | ||
689 | if (delegation == NULL) | |
690 | delegation = &deleg_cur->stateid; | |
691 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
692 | goto no_delegation_unlock; | |
693 | ||
b7391f44 | 694 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 695 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
696 | ret = 1; |
697 | no_delegation_unlock: | |
698 | spin_unlock(&deleg_cur->lock); | |
699 | no_delegation: | |
700 | rcu_read_unlock(); | |
701 | ||
702 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 703 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
704 | ret = 1; |
705 | } | |
706 | ||
707 | return ret; | |
708 | } | |
709 | ||
710 | ||
dc0b027d | 711 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
712 | { |
713 | struct nfs_delegation *delegation; | |
714 | ||
715 | rcu_read_lock(); | |
716 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 717 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
718 | rcu_read_unlock(); |
719 | return; | |
720 | } | |
721 | rcu_read_unlock(); | |
722 | nfs_inode_return_delegation(inode); | |
723 | } | |
724 | ||
6ee41268 | 725 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
726 | { |
727 | struct nfs4_state *state = opendata->state; | |
728 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
729 | struct nfs_delegation *delegation; | |
dc0b027d TM |
730 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
731 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
732 | nfs4_stateid stateid; |
733 | int ret = -EAGAIN; | |
734 | ||
aac00a8d | 735 | for (;;) { |
dc0b027d | 736 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 737 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
738 | if (can_open_cached(state, fmode, open_mode)) { |
739 | update_open_stateflags(state, fmode); | |
6ee41268 | 740 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
741 | goto out_return_state; |
742 | } | |
743 | spin_unlock(&state->owner->so_lock); | |
744 | } | |
34310430 TM |
745 | rcu_read_lock(); |
746 | delegation = rcu_dereference(nfsi->delegation); | |
747 | if (delegation == NULL || | |
dc0b027d | 748 | !can_open_delegated(delegation, fmode)) { |
34310430 | 749 | rcu_read_unlock(); |
aac00a8d | 750 | break; |
34310430 | 751 | } |
aac00a8d TM |
752 | /* Save the delegation */ |
753 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
754 | rcu_read_unlock(); | |
af22f94a | 755 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
756 | if (ret != 0) |
757 | goto out; | |
758 | ret = -EAGAIN; | |
34310430 TM |
759 | |
760 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 761 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 762 | goto out_return_state; |
aac00a8d | 763 | } |
aac00a8d TM |
764 | out: |
765 | return ERR_PTR(ret); | |
766 | out_return_state: | |
767 | atomic_inc(&state->count); | |
768 | return state; | |
769 | } | |
770 | ||
24ac23ab TM |
771 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
772 | { | |
773 | struct inode *inode; | |
774 | struct nfs4_state *state = NULL; | |
003707c7 | 775 | struct nfs_delegation *delegation; |
1b370bc2 | 776 | int ret; |
24ac23ab | 777 | |
aac00a8d | 778 | if (!data->rpc_done) { |
6ee41268 | 779 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
780 | goto out; |
781 | } | |
782 | ||
1b370bc2 | 783 | ret = -EAGAIN; |
24ac23ab | 784 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 785 | goto err; |
24ac23ab | 786 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 787 | ret = PTR_ERR(inode); |
03f28e3a | 788 | if (IS_ERR(inode)) |
1b370bc2 TM |
789 | goto err; |
790 | ret = -ENOMEM; | |
24ac23ab TM |
791 | state = nfs4_get_open_state(inode, data->owner); |
792 | if (state == NULL) | |
1b370bc2 | 793 | goto err_put_inode; |
549d6ed5 | 794 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
795 | int delegation_flags = 0; |
796 | ||
003707c7 TM |
797 | rcu_read_lock(); |
798 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
799 | if (delegation) | |
800 | delegation_flags = delegation->flags; | |
801 | rcu_read_unlock(); | |
15c831bf | 802 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
803 | nfs_inode_set_delegation(state->inode, |
804 | data->owner->so_cred, | |
805 | &data->o_res); | |
806 | else | |
807 | nfs_inode_reclaim_delegation(state->inode, | |
808 | data->owner->so_cred, | |
809 | &data->o_res); | |
810 | } | |
34310430 TM |
811 | |
812 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 813 | data->o_arg.fmode); |
24ac23ab | 814 | iput(inode); |
aac00a8d | 815 | out: |
24ac23ab | 816 | return state; |
1b370bc2 TM |
817 | err_put_inode: |
818 | iput(inode); | |
819 | err: | |
820 | return ERR_PTR(ret); | |
24ac23ab TM |
821 | } |
822 | ||
864472e9 TM |
823 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
824 | { | |
825 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
826 | struct nfs_open_context *ctx; | |
827 | ||
828 | spin_lock(&state->inode->i_lock); | |
829 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
830 | if (ctx->state != state) | |
831 | continue; | |
832 | get_nfs_open_context(ctx); | |
833 | spin_unlock(&state->inode->i_lock); | |
834 | return ctx; | |
835 | } | |
836 | spin_unlock(&state->inode->i_lock); | |
837 | return ERR_PTR(-ENOENT); | |
838 | } | |
839 | ||
6f220ed5 TM |
840 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
841 | { | |
842 | struct nfs4_opendata *opendata; | |
843 | ||
dc0b027d | 844 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
845 | if (opendata == NULL) |
846 | return ERR_PTR(-ENOMEM); | |
847 | opendata->state = state; | |
848 | atomic_inc(&state->count); | |
849 | return opendata; | |
850 | } | |
851 | ||
dc0b027d | 852 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 853 | { |
2ced46c2 | 854 | struct nfs4_state *newstate; |
864472e9 TM |
855 | int ret; |
856 | ||
dc0b027d TM |
857 | opendata->o_arg.open_flags = 0; |
858 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
859 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
860 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
861 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
862 | ret = _nfs4_proc_open(opendata); |
863 | if (ret != 0) | |
864 | return ret; | |
2ced46c2 | 865 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
866 | if (IS_ERR(newstate)) |
867 | return PTR_ERR(newstate); | |
dc0b027d | 868 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 869 | *res = newstate; |
864472e9 TM |
870 | return 0; |
871 | } | |
872 | ||
873 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
874 | { | |
864472e9 | 875 | struct nfs4_state *newstate; |
864472e9 TM |
876 | int ret; |
877 | ||
878 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 879 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
880 | smp_rmb(); |
881 | if (state->n_rdwr != 0) { | |
2ced46c2 | 882 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
883 | if (ret != 0) |
884 | return ret; | |
2ced46c2 TM |
885 | if (newstate != state) |
886 | return -ESTALE; | |
864472e9 TM |
887 | } |
888 | if (state->n_wronly != 0) { | |
2ced46c2 | 889 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
890 | if (ret != 0) |
891 | return ret; | |
2ced46c2 TM |
892 | if (newstate != state) |
893 | return -ESTALE; | |
864472e9 TM |
894 | } |
895 | if (state->n_rdonly != 0) { | |
2ced46c2 | 896 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
897 | if (ret != 0) |
898 | return ret; | |
2ced46c2 TM |
899 | if (newstate != state) |
900 | return -ESTALE; | |
864472e9 | 901 | } |
1ac7e2fd TM |
902 | /* |
903 | * We may have performed cached opens for all three recoveries. | |
904 | * Check if we need to update the current stateid. | |
905 | */ | |
906 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
907 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 908 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
909 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
910 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 911 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 912 | } |
864472e9 TM |
913 | return 0; |
914 | } | |
915 | ||
1da177e4 LT |
916 | /* |
917 | * OPEN_RECLAIM: | |
918 | * reclaim state on the server after a reboot. | |
1da177e4 | 919 | */ |
539cd03a | 920 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 921 | { |
1ac7e2fd | 922 | struct nfs_delegation *delegation; |
864472e9 | 923 | struct nfs4_opendata *opendata; |
dc0b027d | 924 | fmode_t delegation_type = 0; |
1da177e4 LT |
925 | int status; |
926 | ||
6f220ed5 TM |
927 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
928 | if (IS_ERR(opendata)) | |
929 | return PTR_ERR(opendata); | |
864472e9 TM |
930 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
931 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
932 | rcu_read_lock(); |
933 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 934 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 935 | delegation_type = delegation->type; |
1ac7e2fd | 936 | rcu_read_unlock(); |
864472e9 TM |
937 | opendata->o_arg.u.delegation_type = delegation_type; |
938 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 939 | nfs4_opendata_put(opendata); |
1da177e4 LT |
940 | return status; |
941 | } | |
942 | ||
539cd03a | 943 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
944 | { |
945 | struct nfs_server *server = NFS_SERVER(state->inode); | |
946 | struct nfs4_exception exception = { }; | |
947 | int err; | |
948 | do { | |
539cd03a | 949 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
950 | if (err != -NFS4ERR_DELAY) |
951 | break; | |
952 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
953 | } while (exception.retry); |
954 | return err; | |
955 | } | |
956 | ||
864472e9 TM |
957 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
958 | { | |
959 | struct nfs_open_context *ctx; | |
960 | int ret; | |
961 | ||
962 | ctx = nfs4_state_find_open_context(state); | |
963 | if (IS_ERR(ctx)) | |
964 | return PTR_ERR(ctx); | |
539cd03a | 965 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
966 | put_nfs_open_context(ctx); |
967 | return ret; | |
968 | } | |
969 | ||
13437e12 | 970 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 971 | { |
e56e0b78 | 972 | struct nfs4_opendata *opendata; |
864472e9 | 973 | int ret; |
1da177e4 | 974 | |
6f220ed5 TM |
975 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
976 | if (IS_ERR(opendata)) | |
977 | return PTR_ERR(opendata); | |
e56e0b78 | 978 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 979 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 980 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 981 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 982 | nfs4_opendata_put(opendata); |
864472e9 | 983 | return ret; |
1da177e4 LT |
984 | } |
985 | ||
13437e12 | 986 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
987 | { |
988 | struct nfs4_exception exception = { }; | |
539cd03a | 989 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
990 | int err; |
991 | do { | |
13437e12 | 992 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
993 | switch (err) { |
994 | case 0: | |
995 | return err; | |
996 | case -NFS4ERR_STALE_CLIENTID: | |
997 | case -NFS4ERR_STALE_STATEID: | |
998 | case -NFS4ERR_EXPIRED: | |
999 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1000 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
1001 | return err; |
1002 | } | |
1003 | err = nfs4_handle_exception(server, err, &exception); | |
1004 | } while (exception.retry); | |
1005 | return err; | |
1006 | } | |
1007 | ||
cdd4e68b TM |
1008 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1009 | { | |
1010 | struct nfs4_opendata *data = calldata; | |
1011 | ||
1012 | data->rpc_status = task->tk_status; | |
1013 | if (RPC_ASSASSINATED(task)) | |
1014 | return; | |
26e976a8 | 1015 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1016 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1017 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1018 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1019 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1020 | data->rpc_done = 1; |
26e976a8 | 1021 | } |
cdd4e68b TM |
1022 | } |
1023 | ||
1024 | static void nfs4_open_confirm_release(void *calldata) | |
1025 | { | |
1026 | struct nfs4_opendata *data = calldata; | |
1027 | struct nfs4_state *state = NULL; | |
1028 | ||
1029 | /* If this request hasn't been cancelled, do nothing */ | |
1030 | if (data->cancelled == 0) | |
1031 | goto out_free; | |
1032 | /* In case of error, no cleanup! */ | |
3e309914 | 1033 | if (!data->rpc_done) |
cdd4e68b | 1034 | goto out_free; |
cdd4e68b | 1035 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1036 | if (!IS_ERR(state)) |
dc0b027d | 1037 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1038 | out_free: |
c6d00e63 | 1039 | nfs4_opendata_put(data); |
cdd4e68b TM |
1040 | } |
1041 | ||
1042 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1043 | .rpc_call_done = nfs4_open_confirm_done, |
1044 | .rpc_release = nfs4_open_confirm_release, | |
1045 | }; | |
1046 | ||
1047 | /* | |
1048 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1049 | */ | |
1050 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1051 | { | |
1052 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1053 | struct rpc_task *task; | |
5138fde0 TM |
1054 | struct rpc_message msg = { |
1055 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1056 | .rpc_argp = &data->c_arg, | |
1057 | .rpc_resp = &data->c_res, | |
1058 | .rpc_cred = data->owner->so_cred, | |
1059 | }; | |
c970aa85 TM |
1060 | struct rpc_task_setup task_setup_data = { |
1061 | .rpc_client = server->client, | |
5138fde0 | 1062 | .rpc_message = &msg, |
c970aa85 TM |
1063 | .callback_ops = &nfs4_open_confirm_ops, |
1064 | .callback_data = data, | |
101070ca | 1065 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1066 | .flags = RPC_TASK_ASYNC, |
1067 | }; | |
1da177e4 LT |
1068 | int status; |
1069 | ||
c6d00e63 | 1070 | kref_get(&data->kref); |
3e309914 TM |
1071 | data->rpc_done = 0; |
1072 | data->rpc_status = 0; | |
5138fde0 | 1073 | data->timestamp = jiffies; |
c970aa85 | 1074 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1075 | if (IS_ERR(task)) |
cdd4e68b | 1076 | return PTR_ERR(task); |
cdd4e68b TM |
1077 | status = nfs4_wait_for_completion_rpc_task(task); |
1078 | if (status != 0) { | |
1079 | data->cancelled = 1; | |
1080 | smp_wmb(); | |
1081 | } else | |
1082 | status = data->rpc_status; | |
e6b3c4db | 1083 | rpc_put_task(task); |
1da177e4 LT |
1084 | return status; |
1085 | } | |
1086 | ||
24ac23ab | 1087 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1088 | { |
24ac23ab TM |
1089 | struct nfs4_opendata *data = calldata; |
1090 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1091 | |
24ac23ab TM |
1092 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1093 | return; | |
aac00a8d TM |
1094 | /* |
1095 | * Check if we still need to send an OPEN call, or if we can use | |
1096 | * a delegation instead. | |
1097 | */ | |
1098 | if (data->state != NULL) { | |
1099 | struct nfs_delegation *delegation; | |
1100 | ||
dc0b027d | 1101 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1102 | goto out_no_action; |
aac00a8d TM |
1103 | rcu_read_lock(); |
1104 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1105 | if (delegation != NULL && | |
15c831bf | 1106 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1107 | rcu_read_unlock(); |
6ee41268 | 1108 | goto out_no_action; |
aac00a8d TM |
1109 | } |
1110 | rcu_read_unlock(); | |
1111 | } | |
24ac23ab | 1112 | /* Update sequence id. */ |
9f958ab8 | 1113 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 1114 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 1115 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1116 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1117 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1118 | } | |
26e976a8 | 1119 | data->timestamp = jiffies; |
5138fde0 | 1120 | rpc_call_start(task); |
6ee41268 TM |
1121 | return; |
1122 | out_no_action: | |
1123 | task->tk_action = NULL; | |
1124 | ||
24ac23ab | 1125 | } |
1da177e4 | 1126 | |
24ac23ab TM |
1127 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1128 | { | |
1129 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1130 | |
24ac23ab TM |
1131 | data->rpc_status = task->tk_status; |
1132 | if (RPC_ASSASSINATED(task)) | |
1133 | return; | |
1134 | if (task->tk_status == 0) { | |
1135 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1136 | case S_IFREG: |
1137 | break; | |
1138 | case S_IFLNK: | |
24ac23ab | 1139 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1140 | break; |
1141 | case S_IFDIR: | |
24ac23ab | 1142 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1143 | break; |
1144 | default: | |
24ac23ab | 1145 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1146 | } |
26e976a8 | 1147 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1148 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1149 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1150 | } |
3e309914 | 1151 | data->rpc_done = 1; |
24ac23ab | 1152 | } |
6f926b5b | 1153 | |
24ac23ab TM |
1154 | static void nfs4_open_release(void *calldata) |
1155 | { | |
1156 | struct nfs4_opendata *data = calldata; | |
1157 | struct nfs4_state *state = NULL; | |
1158 | ||
1159 | /* If this request hasn't been cancelled, do nothing */ | |
1160 | if (data->cancelled == 0) | |
1161 | goto out_free; | |
1162 | /* In case of error, no cleanup! */ | |
3e309914 | 1163 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1164 | goto out_free; |
1165 | /* In case we need an open_confirm, no cleanup! */ | |
1166 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1167 | goto out_free; | |
24ac23ab | 1168 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1169 | if (!IS_ERR(state)) |
dc0b027d | 1170 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1171 | out_free: |
c6d00e63 | 1172 | nfs4_opendata_put(data); |
24ac23ab TM |
1173 | } |
1174 | ||
1175 | static const struct rpc_call_ops nfs4_open_ops = { | |
1176 | .rpc_call_prepare = nfs4_open_prepare, | |
1177 | .rpc_call_done = nfs4_open_done, | |
1178 | .rpc_release = nfs4_open_release, | |
1179 | }; | |
1180 | ||
1181 | /* | |
1182 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1183 | */ | |
1184 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1185 | { | |
1186 | struct inode *dir = data->dir->d_inode; | |
1187 | struct nfs_server *server = NFS_SERVER(dir); | |
1188 | struct nfs_openargs *o_arg = &data->o_arg; | |
1189 | struct nfs_openres *o_res = &data->o_res; | |
1190 | struct rpc_task *task; | |
5138fde0 TM |
1191 | struct rpc_message msg = { |
1192 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1193 | .rpc_argp = o_arg, | |
1194 | .rpc_resp = o_res, | |
1195 | .rpc_cred = data->owner->so_cred, | |
1196 | }; | |
c970aa85 TM |
1197 | struct rpc_task_setup task_setup_data = { |
1198 | .rpc_client = server->client, | |
5138fde0 | 1199 | .rpc_message = &msg, |
c970aa85 TM |
1200 | .callback_ops = &nfs4_open_ops, |
1201 | .callback_data = data, | |
101070ca | 1202 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1203 | .flags = RPC_TASK_ASYNC, |
1204 | }; | |
24ac23ab TM |
1205 | int status; |
1206 | ||
c6d00e63 | 1207 | kref_get(&data->kref); |
3e309914 TM |
1208 | data->rpc_done = 0; |
1209 | data->rpc_status = 0; | |
2ced46c2 | 1210 | data->cancelled = 0; |
c970aa85 | 1211 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1212 | if (IS_ERR(task)) |
24ac23ab | 1213 | return PTR_ERR(task); |
24ac23ab TM |
1214 | status = nfs4_wait_for_completion_rpc_task(task); |
1215 | if (status != 0) { | |
1216 | data->cancelled = 1; | |
1217 | smp_wmb(); | |
1218 | } else | |
1219 | status = data->rpc_status; | |
e6b3c4db | 1220 | rpc_put_task(task); |
3e309914 | 1221 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1222 | return status; |
1223 | ||
9936781d TM |
1224 | if (o_res->fh.size == 0) |
1225 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1226 | ||
56ae19f3 TM |
1227 | if (o_arg->open_flags & O_CREAT) { |
1228 | update_changeattr(dir, &o_res->cinfo); | |
1229 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1230 | } else | |
1231 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1232 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1233 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1234 | if (status != 0) |
24ac23ab | 1235 | return status; |
1da177e4 LT |
1236 | } |
1237 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1238 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1239 | return 0; |
1da177e4 LT |
1240 | } |
1241 | ||
10afec90 | 1242 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1243 | { |
7539bbab | 1244 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1245 | int ret; |
58d9714a | 1246 | |
6b30954e | 1247 | for (;;) { |
65de872e | 1248 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1249 | if (ret != 0) |
1250 | return ret; | |
e598d843 TM |
1251 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1252 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1253 | break; |
58d9714a | 1254 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1255 | } |
1256 | return 0; | |
58d9714a TM |
1257 | } |
1258 | ||
1da177e4 LT |
1259 | /* |
1260 | * OPEN_EXPIRED: | |
1261 | * reclaim state on the server after a network partition. | |
1262 | * Assumes caller holds the appropriate lock | |
1263 | */ | |
539cd03a | 1264 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1265 | { |
e56e0b78 | 1266 | struct nfs4_opendata *opendata; |
864472e9 | 1267 | int ret; |
1da177e4 | 1268 | |
6f220ed5 TM |
1269 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1270 | if (IS_ERR(opendata)) | |
1271 | return PTR_ERR(opendata); | |
864472e9 | 1272 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1273 | if (ret == -ESTALE) |
539cd03a | 1274 | d_drop(ctx->path.dentry); |
c6d00e63 | 1275 | nfs4_opendata_put(opendata); |
864472e9 | 1276 | return ret; |
1da177e4 LT |
1277 | } |
1278 | ||
539cd03a | 1279 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1280 | { |
539cd03a | 1281 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1282 | struct nfs4_exception exception = { }; |
1283 | int err; | |
1284 | ||
1285 | do { | |
539cd03a | 1286 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1287 | if (err != -NFS4ERR_DELAY) |
1288 | break; | |
1289 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1290 | } while (exception.retry); |
1291 | return err; | |
1292 | } | |
1293 | ||
1da177e4 LT |
1294 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1295 | { | |
1da177e4 | 1296 | struct nfs_open_context *ctx; |
864472e9 | 1297 | int ret; |
1da177e4 | 1298 | |
864472e9 TM |
1299 | ctx = nfs4_state_find_open_context(state); |
1300 | if (IS_ERR(ctx)) | |
1301 | return PTR_ERR(ctx); | |
539cd03a | 1302 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1303 | put_nfs_open_context(ctx); |
1304 | return ret; | |
1da177e4 LT |
1305 | } |
1306 | ||
aa53ed54 JL |
1307 | /* |
1308 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1309 | * fields corresponding to attributes that were used to store the verifier. | |
1310 | * Make sure we clobber those fields in the later setattr call | |
1311 | */ | |
1312 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1313 | { | |
1314 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1315 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1316 | sattr->ia_valid |= ATTR_ATIME; | |
1317 | ||
1318 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1319 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1320 | sattr->ia_valid |= ATTR_MTIME; | |
1321 | } | |
1322 | ||
1da177e4 | 1323 | /* |
24ac23ab | 1324 | * Returns a referenced nfs4_state |
1da177e4 | 1325 | */ |
dc0b027d | 1326 | static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
1da177e4 LT |
1327 | { |
1328 | struct nfs4_state_owner *sp; | |
1329 | struct nfs4_state *state = NULL; | |
1330 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1331 | struct nfs4_opendata *opendata; |
aac00a8d | 1332 | int status; |
1da177e4 LT |
1333 | |
1334 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1335 | status = -ENOMEM; |
1336 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1337 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1338 | goto out_err; | |
1339 | } | |
58d9714a TM |
1340 | status = nfs4_recover_expired_lease(server); |
1341 | if (status != 0) | |
b4454fe1 | 1342 | goto err_put_state_owner; |
aac00a8d | 1343 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1344 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1345 | status = -ENOMEM; |
dc0b027d | 1346 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1347 | if (opendata == NULL) |
95d35cb4 | 1348 | goto err_put_state_owner; |
1da177e4 | 1349 | |
aac00a8d TM |
1350 | if (path->dentry->d_inode != NULL) |
1351 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1352 | ||
24ac23ab | 1353 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1354 | if (status != 0) |
c6d00e63 | 1355 | goto err_opendata_put; |
1da177e4 | 1356 | |
aa53ed54 JL |
1357 | if (opendata->o_arg.open_flags & O_EXCL) |
1358 | nfs4_exclusive_attrset(opendata, sattr); | |
1359 | ||
24ac23ab | 1360 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1361 | status = PTR_ERR(state); |
1362 | if (IS_ERR(state)) | |
c6d00e63 | 1363 | goto err_opendata_put; |
c6d00e63 | 1364 | nfs4_opendata_put(opendata); |
1da177e4 | 1365 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1366 | *res = state; |
1367 | return 0; | |
c6d00e63 TM |
1368 | err_opendata_put: |
1369 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1370 | err_put_state_owner: |
1371 | nfs4_put_state_owner(sp); | |
1da177e4 | 1372 | out_err: |
1da177e4 LT |
1373 | *res = NULL; |
1374 | return status; | |
1375 | } | |
1376 | ||
1377 | ||
dc0b027d | 1378 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) |
1da177e4 LT |
1379 | { |
1380 | struct nfs4_exception exception = { }; | |
1381 | struct nfs4_state *res; | |
1382 | int status; | |
1383 | ||
1384 | do { | |
dc0b027d | 1385 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1386 | if (status == 0) |
1387 | break; | |
1388 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1389 | * book-keeping w.r.t. state-changing operations | |
1390 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1391 | * It is actually a sign of a bug on the client or on the server. | |
1392 | * | |
1393 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1394 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1395 | * have unhashed the old state_owner for us, and that we can |
1396 | * therefore safely retry using a new one. We should still warn | |
1397 | * the user though... | |
1398 | */ | |
1399 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1400 | printk(KERN_WARNING "NFS: v4 server %s " |
1401 | " returned a bad sequence-id error!\n", | |
1402 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1403 | exception.retry = 1; |
1404 | continue; | |
1405 | } | |
550f5747 TM |
1406 | /* |
1407 | * BAD_STATEID on OPEN means that the server cancelled our | |
1408 | * state before it received the OPEN_CONFIRM. | |
1409 | * Recover by retrying the request as per the discussion | |
1410 | * on Page 181 of RFC3530. | |
1411 | */ | |
1412 | if (status == -NFS4ERR_BAD_STATEID) { | |
1413 | exception.retry = 1; | |
1414 | continue; | |
1415 | } | |
aac00a8d TM |
1416 | if (status == -EAGAIN) { |
1417 | /* We must have found a delegation */ | |
1418 | exception.retry = 1; | |
1419 | continue; | |
1420 | } | |
1da177e4 LT |
1421 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1422 | status, &exception)); | |
1423 | } while (exception.retry); | |
1424 | return res; | |
1425 | } | |
1426 | ||
659bfcd6 TM |
1427 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1428 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1429 | struct nfs4_state *state) | |
1da177e4 | 1430 | { |
3e4f6290 | 1431 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1432 | struct nfs_setattrargs arg = { |
3e4f6290 | 1433 | .fh = NFS_FH(inode), |
1da177e4 LT |
1434 | .iap = sattr, |
1435 | .server = server, | |
1436 | .bitmask = server->attr_bitmask, | |
1437 | }; | |
1438 | struct nfs_setattrres res = { | |
1439 | .fattr = fattr, | |
1440 | .server = server, | |
1441 | }; | |
1442 | struct rpc_message msg = { | |
659bfcd6 TM |
1443 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1444 | .rpc_argp = &arg, | |
1445 | .rpc_resp = &res, | |
1446 | .rpc_cred = cred, | |
1da177e4 | 1447 | }; |
26e976a8 | 1448 | unsigned long timestamp = jiffies; |
65e4308d | 1449 | int status; |
1da177e4 | 1450 | |
0e574af1 | 1451 | nfs_fattr_init(fattr); |
1da177e4 | 1452 | |
3e4f6290 TM |
1453 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1454 | /* Use that stateid */ | |
1455 | } else if (state != NULL) { | |
08e9eac4 TM |
1456 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1457 | } else | |
1da177e4 LT |
1458 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1459 | ||
cccef3b9 | 1460 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1461 | if (status == 0 && state != NULL) |
1462 | renew_lease(server, timestamp); | |
65e4308d | 1463 | return status; |
1da177e4 LT |
1464 | } |
1465 | ||
659bfcd6 TM |
1466 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1467 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1468 | struct nfs4_state *state) | |
1da177e4 | 1469 | { |
3e4f6290 | 1470 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1471 | struct nfs4_exception exception = { }; |
1472 | int err; | |
1473 | do { | |
1474 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1475 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1476 | &exception); |
1477 | } while (exception.retry); | |
1478 | return err; | |
1479 | } | |
1480 | ||
1481 | struct nfs4_closedata { | |
4a35bd41 | 1482 | struct path path; |
1da177e4 LT |
1483 | struct inode *inode; |
1484 | struct nfs4_state *state; | |
1485 | struct nfs_closeargs arg; | |
1486 | struct nfs_closeres res; | |
516a6af6 | 1487 | struct nfs_fattr fattr; |
26e976a8 | 1488 | unsigned long timestamp; |
1da177e4 LT |
1489 | }; |
1490 | ||
963d8fe5 | 1491 | static void nfs4_free_closedata(void *data) |
9512135d | 1492 | { |
963d8fe5 TM |
1493 | struct nfs4_closedata *calldata = data; |
1494 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1495 | |
1496 | nfs4_put_open_state(calldata->state); | |
1497 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1498 | nfs4_put_state_owner(sp); |
31f31db1 | 1499 | path_put(&calldata->path); |
9512135d TM |
1500 | kfree(calldata); |
1501 | } | |
1502 | ||
963d8fe5 | 1503 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1504 | { |
963d8fe5 | 1505 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1506 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1507 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1508 | ||
4ce70ada TM |
1509 | if (RPC_ASSASSINATED(task)) |
1510 | return; | |
1da177e4 LT |
1511 | /* hmm. we are done with the inode, and in the process of freeing |
1512 | * the state_owner. we keep this around to process errors | |
1513 | */ | |
1da177e4 LT |
1514 | switch (task->tk_status) { |
1515 | case 0: | |
45328c35 | 1516 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1517 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1518 | break; |
1519 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1520 | case -NFS4ERR_OLD_STATEID: |
1521 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1522 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1523 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1524 | break; |
1da177e4 | 1525 | default: |
9e33bed5 | 1526 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
1da177e4 LT |
1527 | rpc_restart_call(task); |
1528 | return; | |
1529 | } | |
1530 | } | |
516a6af6 | 1531 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1532 | } |
1533 | ||
4ce70ada | 1534 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1535 | { |
4ce70ada | 1536 | struct nfs4_closedata *calldata = data; |
9512135d | 1537 | struct nfs4_state *state = calldata->state; |
003707c7 | 1538 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1539 | |
963d8fe5 | 1540 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1541 | return; |
003707c7 | 1542 | |
003707c7 | 1543 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1544 | spin_lock(&state->owner->so_lock); |
003707c7 | 1545 | /* Calculate the change in open mode */ |
e7616923 | 1546 | if (state->n_rdwr == 0) { |
003707c7 | 1547 | if (state->n_rdonly == 0) { |
003707c7 TM |
1548 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1549 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1550 | } | |
1551 | if (state->n_wronly == 0) { | |
003707c7 TM |
1552 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1553 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1554 | } | |
e7616923 | 1555 | } |
4cecb76f | 1556 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1557 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1558 | /* Note: exit _without_ calling nfs4_close_done */ |
1559 | task->tk_action = NULL; | |
9512135d TM |
1560 | return; |
1561 | } | |
516a6af6 | 1562 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1563 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1564 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1565 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1566 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1567 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1568 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1569 | } |
26e976a8 | 1570 | calldata->timestamp = jiffies; |
5138fde0 | 1571 | rpc_call_start(task); |
1da177e4 LT |
1572 | } |
1573 | ||
963d8fe5 | 1574 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1575 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1576 | .rpc_call_done = nfs4_close_done, |
1577 | .rpc_release = nfs4_free_closedata, | |
1578 | }; | |
1579 | ||
1da177e4 LT |
1580 | /* |
1581 | * It is possible for data to be read/written from a mem-mapped file | |
1582 | * after the sys_close call (which hits the vfs layer as a flush). | |
1583 | * This means that we can't safely call nfsv4 close on a file until | |
1584 | * the inode is cleared. This in turn means that we are not good | |
1585 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1586 | * share state even when we are done with one of the three share | |
1587 | * stateid's in the inode. | |
1588 | * | |
1589 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1590 | */ | |
a49c3c77 | 1591 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1592 | { |
4a35bd41 | 1593 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1594 | struct nfs4_closedata *calldata; |
b39e625b TM |
1595 | struct nfs4_state_owner *sp = state->owner; |
1596 | struct rpc_task *task; | |
5138fde0 TM |
1597 | struct rpc_message msg = { |
1598 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1599 | .rpc_cred = state->owner->so_cred, | |
1600 | }; | |
c970aa85 TM |
1601 | struct rpc_task_setup task_setup_data = { |
1602 | .rpc_client = server->client, | |
5138fde0 | 1603 | .rpc_message = &msg, |
c970aa85 | 1604 | .callback_ops = &nfs4_close_ops, |
101070ca | 1605 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1606 | .flags = RPC_TASK_ASYNC, |
1607 | }; | |
9512135d | 1608 | int status = -ENOMEM; |
1da177e4 | 1609 | |
9512135d | 1610 | calldata = kmalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1611 | if (calldata == NULL) |
9512135d | 1612 | goto out; |
4a35bd41 | 1613 | calldata->inode = state->inode; |
1da177e4 | 1614 | calldata->state = state; |
4a35bd41 | 1615 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1616 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1617 | /* Serialization for the sequence id */ |
cee54fc9 | 1618 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1619 | if (calldata->arg.seqid == NULL) |
1620 | goto out_free_calldata; | |
dc0b027d | 1621 | calldata->arg.fmode = 0; |
a65318bf | 1622 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1623 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1624 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1625 | calldata->res.server = server; |
5f7dbd5c | 1626 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
4a35bd41 TM |
1627 | calldata->path.mnt = mntget(path->mnt); |
1628 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1629 | |
5138fde0 TM |
1630 | msg.rpc_argp = &calldata->arg, |
1631 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1632 | task_setup_data.callback_data = calldata; |
1633 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1634 | if (IS_ERR(task)) |
1635 | return PTR_ERR(task); | |
a49c3c77 TM |
1636 | status = 0; |
1637 | if (wait) | |
1638 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1639 | rpc_put_task(task); |
a49c3c77 | 1640 | return status; |
9512135d TM |
1641 | out_free_calldata: |
1642 | kfree(calldata); | |
1643 | out: | |
b39e625b TM |
1644 | nfs4_put_open_state(state); |
1645 | nfs4_put_state_owner(sp); | |
9512135d | 1646 | return status; |
1da177e4 LT |
1647 | } |
1648 | ||
dc0b027d | 1649 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1650 | { |
1651 | struct file *filp; | |
1b45c46c | 1652 | int ret; |
02a913a7 | 1653 | |
1b45c46c | 1654 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1655 | if (fmode & FMODE_EXEC) { |
af22f94a | 1656 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1657 | state->owner->so_cred, |
1658 | nd->intent.open.flags); | |
1659 | if (ret < 0) | |
1660 | goto out_close; | |
1661 | } | |
4a35bd41 | 1662 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1663 | if (!IS_ERR(filp)) { |
1664 | struct nfs_open_context *ctx; | |
cd3758e3 | 1665 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1666 | ctx->state = state; |
95cf959b TM |
1667 | return 0; |
1668 | } | |
1b45c46c TM |
1669 | ret = PTR_ERR(filp); |
1670 | out_close: | |
dc0b027d | 1671 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1672 | return ret; |
02a913a7 TM |
1673 | } |
1674 | ||
1675 | struct dentry * | |
1da177e4 LT |
1676 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1677 | { | |
ad389da7 | 1678 | struct path path = { |
4ac91378 | 1679 | .mnt = nd->path.mnt, |
ad389da7 TM |
1680 | .dentry = dentry, |
1681 | }; | |
4ac91378 | 1682 | struct dentry *parent; |
1da177e4 LT |
1683 | struct iattr attr; |
1684 | struct rpc_cred *cred; | |
1685 | struct nfs4_state *state; | |
02a913a7 | 1686 | struct dentry *res; |
dc0b027d | 1687 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1688 | |
1689 | if (nd->flags & LOOKUP_CREATE) { | |
1690 | attr.ia_mode = nd->intent.open.create_mode; | |
1691 | attr.ia_valid = ATTR_MODE; | |
1692 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 1693 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
1694 | } else { |
1695 | attr.ia_valid = 0; | |
1696 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1697 | } | |
1698 | ||
98a8e323 | 1699 | cred = rpc_lookup_cred(); |
1da177e4 | 1700 | if (IS_ERR(cred)) |
02a913a7 | 1701 | return (struct dentry *)cred; |
565277f6 TM |
1702 | parent = dentry->d_parent; |
1703 | /* Protect against concurrent sillydeletes */ | |
1704 | nfs_block_sillyrename(parent); | |
dc0b027d | 1705 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1706 | put_rpccred(cred); |
02a913a7 | 1707 | if (IS_ERR(state)) { |
d75340cc | 1708 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1709 | d_add(dentry, NULL); |
d75340cc TM |
1710 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1711 | } | |
565277f6 | 1712 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1713 | return (struct dentry *)state; |
1714 | } | |
24ac23ab | 1715 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1716 | if (res != NULL) |
deee9369 | 1717 | path.dentry = res; |
d75340cc | 1718 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1719 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1720 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1721 | return res; |
1da177e4 LT |
1722 | } |
1723 | ||
1724 | int | |
02a913a7 | 1725 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1726 | { |
ad389da7 | 1727 | struct path path = { |
4ac91378 | 1728 | .mnt = nd->path.mnt, |
ad389da7 TM |
1729 | .dentry = dentry, |
1730 | }; | |
1da177e4 LT |
1731 | struct rpc_cred *cred; |
1732 | struct nfs4_state *state; | |
dc0b027d | 1733 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1734 | |
98a8e323 | 1735 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1736 | if (IS_ERR(cred)) |
1737 | return PTR_ERR(cred); | |
dc0b027d | 1738 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1739 | put_rpccred(cred); |
02a913a7 TM |
1740 | if (IS_ERR(state)) { |
1741 | switch (PTR_ERR(state)) { | |
1742 | case -EPERM: | |
1743 | case -EACCES: | |
1744 | case -EDQUOT: | |
1745 | case -ENOSPC: | |
1746 | case -EROFS: | |
1747 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1748 | return 1; | |
b87c0adf CL |
1749 | default: |
1750 | goto out_drop; | |
02a913a7 | 1751 | } |
02a913a7 | 1752 | } |
24ac23ab | 1753 | if (state->inode == dentry->d_inode) { |
d75340cc | 1754 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1755 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1756 | return 1; |
1757 | } | |
dc0b027d | 1758 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1759 | out_drop: |
1760 | d_drop(dentry); | |
1da177e4 LT |
1761 | return 0; |
1762 | } | |
1763 | ||
7fe5c398 TM |
1764 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
1765 | { | |
1766 | if (ctx->state == NULL) | |
1767 | return; | |
1768 | if (is_sync) | |
1769 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1770 | else | |
1771 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1772 | } | |
1da177e4 LT |
1773 | |
1774 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1775 | { | |
43652ad5 BH |
1776 | struct nfs4_server_caps_arg args = { |
1777 | .fhandle = fhandle, | |
1778 | }; | |
1da177e4 LT |
1779 | struct nfs4_server_caps_res res = {}; |
1780 | struct rpc_message msg = { | |
1781 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 1782 | .rpc_argp = &args, |
1da177e4 LT |
1783 | .rpc_resp = &res, |
1784 | }; | |
1785 | int status; | |
1786 | ||
cccef3b9 | 1787 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1788 | if (status == 0) { |
1789 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1790 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1791 | server->caps |= NFS_CAP_ACLS; | |
1792 | if (res.has_links != 0) | |
1793 | server->caps |= NFS_CAP_HARDLINKS; | |
1794 | if (res.has_symlinks != 0) | |
1795 | server->caps |= NFS_CAP_SYMLINKS; | |
a65318bf TM |
1796 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
1797 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1798 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
1799 | server->acl_bitmask = res.acl_bitmask; |
1800 | } | |
cccef3b9 | 1801 | |
1da177e4 LT |
1802 | return status; |
1803 | } | |
1804 | ||
55a97593 | 1805 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1806 | { |
1807 | struct nfs4_exception exception = { }; | |
1808 | int err; | |
1809 | do { | |
1810 | err = nfs4_handle_exception(server, | |
1811 | _nfs4_server_capabilities(server, fhandle), | |
1812 | &exception); | |
1813 | } while (exception.retry); | |
1814 | return err; | |
1815 | } | |
1816 | ||
1817 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1818 | struct nfs_fsinfo *info) | |
1819 | { | |
1da177e4 LT |
1820 | struct nfs4_lookup_root_arg args = { |
1821 | .bitmask = nfs4_fattr_bitmap, | |
1822 | }; | |
1823 | struct nfs4_lookup_res res = { | |
1824 | .server = server, | |
0e574af1 | 1825 | .fattr = info->fattr, |
1da177e4 LT |
1826 | .fh = fhandle, |
1827 | }; | |
1828 | struct rpc_message msg = { | |
1829 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1830 | .rpc_argp = &args, | |
1831 | .rpc_resp = &res, | |
1832 | }; | |
0e574af1 | 1833 | nfs_fattr_init(info->fattr); |
cccef3b9 | 1834 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1835 | } |
1836 | ||
1837 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1838 | struct nfs_fsinfo *info) | |
1839 | { | |
1840 | struct nfs4_exception exception = { }; | |
1841 | int err; | |
1842 | do { | |
1843 | err = nfs4_handle_exception(server, | |
1844 | _nfs4_lookup_root(server, fhandle, info), | |
1845 | &exception); | |
1846 | } while (exception.retry); | |
1847 | return err; | |
1848 | } | |
1849 | ||
54ceac45 DH |
1850 | /* |
1851 | * get the file handle for the "/" directory on the server | |
1852 | */ | |
1da177e4 | 1853 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1854 | struct nfs_fsinfo *info) |
1da177e4 | 1855 | { |
1da177e4 LT |
1856 | int status; |
1857 | ||
1da177e4 | 1858 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
1859 | if (status == 0) |
1860 | status = nfs4_server_capabilities(server, fhandle); | |
1861 | if (status == 0) | |
1862 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 1863 | return nfs4_map_errors(status); |
1da177e4 LT |
1864 | } |
1865 | ||
6b97fd3d MN |
1866 | /* |
1867 | * Get locations and (maybe) other attributes of a referral. | |
1868 | * Note that we'll actually follow the referral later when | |
1869 | * we detect fsid mismatch in inode revalidation | |
1870 | */ | |
56659e99 | 1871 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
1872 | { |
1873 | int status = -ENOMEM; | |
1874 | struct page *page = NULL; | |
1875 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
1876 | |
1877 | page = alloc_page(GFP_KERNEL); | |
1878 | if (page == NULL) | |
1879 | goto out; | |
1880 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1881 | if (locations == NULL) | |
1882 | goto out; | |
1883 | ||
c228fd3a | 1884 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
1885 | if (status != 0) |
1886 | goto out; | |
1887 | /* Make sure server returned a different fsid for the referral */ | |
1888 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 1889 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
1890 | status = -EIO; |
1891 | goto out; | |
1892 | } | |
1893 | ||
1894 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
1895 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
1896 | if (!fattr->mode) | |
1897 | fattr->mode = S_IFDIR; | |
1898 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
1899 | out: | |
1900 | if (page) | |
1901 | __free_page(page); | |
1902 | if (locations) | |
1903 | kfree(locations); | |
1904 | return status; | |
1905 | } | |
1906 | ||
1da177e4 LT |
1907 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
1908 | { | |
1909 | struct nfs4_getattr_arg args = { | |
1910 | .fh = fhandle, | |
1911 | .bitmask = server->attr_bitmask, | |
1912 | }; | |
1913 | struct nfs4_getattr_res res = { | |
1914 | .fattr = fattr, | |
1915 | .server = server, | |
1916 | }; | |
1917 | struct rpc_message msg = { | |
1918 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
1919 | .rpc_argp = &args, | |
1920 | .rpc_resp = &res, | |
1921 | }; | |
1922 | ||
0e574af1 | 1923 | nfs_fattr_init(fattr); |
cccef3b9 | 1924 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1925 | } |
1926 | ||
1927 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
1928 | { | |
1929 | struct nfs4_exception exception = { }; | |
1930 | int err; | |
1931 | do { | |
1932 | err = nfs4_handle_exception(server, | |
1933 | _nfs4_proc_getattr(server, fhandle, fattr), | |
1934 | &exception); | |
1935 | } while (exception.retry); | |
1936 | return err; | |
1937 | } | |
1938 | ||
1939 | /* | |
1940 | * The file is not closed if it is opened due to the a request to change | |
1941 | * the size of the file. The open call will not be needed once the | |
1942 | * VFS layer lookup-intents are implemented. | |
1943 | * | |
1944 | * Close is called when the inode is destroyed. | |
1945 | * If we haven't opened the file for O_WRONLY, we | |
1946 | * need to in the size_change case to obtain a stateid. | |
1947 | * | |
1948 | * Got race? | |
1949 | * Because OPEN is always done by name in nfsv4, it is | |
1950 | * possible that we opened a different file by the same | |
1951 | * name. We can recognize this race condition, but we | |
1952 | * can't do anything about it besides returning an error. | |
1953 | * | |
1954 | * This will be fixed with VFS changes (lookup-intent). | |
1955 | */ | |
1956 | static int | |
1957 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
1958 | struct iattr *sattr) | |
1959 | { | |
08e9eac4 | 1960 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 1961 | struct rpc_cred *cred = NULL; |
d530838b | 1962 | struct nfs4_state *state = NULL; |
1da177e4 LT |
1963 | int status; |
1964 | ||
0e574af1 | 1965 | nfs_fattr_init(fattr); |
1da177e4 | 1966 | |
d530838b | 1967 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
1968 | if (sattr->ia_valid & ATTR_FILE) { |
1969 | struct nfs_open_context *ctx; | |
1970 | ||
1971 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
1972 | if (ctx) { |
1973 | cred = ctx->cred; | |
1974 | state = ctx->state; | |
1975 | } | |
659bfcd6 | 1976 | } |
08e9eac4 | 1977 | |
659bfcd6 | 1978 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
1979 | if (status == 0) |
1980 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
1981 | return status; |
1982 | } | |
1983 | ||
56659e99 TM |
1984 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
1985 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
1986 | struct nfs_fattr *fattr) |
1987 | { | |
1988 | int status; | |
1989 | struct nfs4_lookup_arg args = { | |
1990 | .bitmask = server->attr_bitmask, | |
1991 | .dir_fh = dirfh, | |
1992 | .name = name, | |
1993 | }; | |
1994 | struct nfs4_lookup_res res = { | |
1995 | .server = server, | |
1996 | .fattr = fattr, | |
1997 | .fh = fhandle, | |
1998 | }; | |
1999 | struct rpc_message msg = { | |
2000 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2001 | .rpc_argp = &args, | |
2002 | .rpc_resp = &res, | |
2003 | }; | |
2004 | ||
2005 | nfs_fattr_init(fattr); | |
2006 | ||
2007 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2008 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2009 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2010 | return status; |
2011 | } | |
2012 | ||
2013 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2014 | struct qstr *name, struct nfs_fh *fhandle, | |
2015 | struct nfs_fattr *fattr) | |
2016 | { | |
2017 | struct nfs4_exception exception = { }; | |
2018 | int err; | |
2019 | do { | |
4e56e082 TM |
2020 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2021 | /* FIXME: !!!! */ | |
2022 | if (err == -NFS4ERR_MOVED) { | |
2023 | err = -EREMOTE; | |
2024 | break; | |
2025 | } | |
2026 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2027 | } while (exception.retry); |
2028 | return err; | |
2029 | } | |
2030 | ||
56659e99 | 2031 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2032 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2033 | { | |
4e56e082 | 2034 | int status; |
1da177e4 LT |
2035 | |
2036 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2037 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2038 | if (status == -NFS4ERR_MOVED) |
2039 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2040 | dprintk("NFS reply lookup: %d\n", status); |
2041 | return status; | |
2042 | } | |
2043 | ||
2044 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2045 | { | |
2046 | struct nfs4_exception exception = { }; | |
2047 | int err; | |
2048 | do { | |
2049 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2050 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2051 | &exception); | |
2052 | } while (exception.retry); | |
2053 | return err; | |
2054 | } | |
2055 | ||
2056 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2057 | { | |
76b32999 TM |
2058 | struct nfs_server *server = NFS_SERVER(inode); |
2059 | struct nfs_fattr fattr; | |
1da177e4 LT |
2060 | struct nfs4_accessargs args = { |
2061 | .fh = NFS_FH(inode), | |
76b32999 TM |
2062 | .bitmask = server->attr_bitmask, |
2063 | }; | |
2064 | struct nfs4_accessres res = { | |
2065 | .server = server, | |
2066 | .fattr = &fattr, | |
1da177e4 | 2067 | }; |
1da177e4 LT |
2068 | struct rpc_message msg = { |
2069 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2070 | .rpc_argp = &args, | |
2071 | .rpc_resp = &res, | |
2072 | .rpc_cred = entry->cred, | |
2073 | }; | |
2074 | int mode = entry->mask; | |
2075 | int status; | |
2076 | ||
2077 | /* | |
2078 | * Determine which access bits we want to ask for... | |
2079 | */ | |
2080 | if (mode & MAY_READ) | |
2081 | args.access |= NFS4_ACCESS_READ; | |
2082 | if (S_ISDIR(inode->i_mode)) { | |
2083 | if (mode & MAY_WRITE) | |
2084 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2085 | if (mode & MAY_EXEC) | |
2086 | args.access |= NFS4_ACCESS_LOOKUP; | |
2087 | } else { | |
2088 | if (mode & MAY_WRITE) | |
2089 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2090 | if (mode & MAY_EXEC) | |
2091 | args.access |= NFS4_ACCESS_EXECUTE; | |
2092 | } | |
76b32999 | 2093 | nfs_fattr_init(&fattr); |
cccef3b9 | 2094 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2095 | if (!status) { |
2096 | entry->mask = 0; | |
2097 | if (res.access & NFS4_ACCESS_READ) | |
2098 | entry->mask |= MAY_READ; | |
2099 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2100 | entry->mask |= MAY_WRITE; | |
2101 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2102 | entry->mask |= MAY_EXEC; | |
76b32999 | 2103 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
2104 | } |
2105 | return status; | |
2106 | } | |
2107 | ||
2108 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2109 | { | |
2110 | struct nfs4_exception exception = { }; | |
2111 | int err; | |
2112 | do { | |
2113 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2114 | _nfs4_proc_access(inode, entry), | |
2115 | &exception); | |
2116 | } while (exception.retry); | |
2117 | return err; | |
2118 | } | |
2119 | ||
2120 | /* | |
2121 | * TODO: For the time being, we don't try to get any attributes | |
2122 | * along with any of the zero-copy operations READ, READDIR, | |
2123 | * READLINK, WRITE. | |
2124 | * | |
2125 | * In the case of the first three, we want to put the GETATTR | |
2126 | * after the read-type operation -- this is because it is hard | |
2127 | * to predict the length of a GETATTR response in v4, and thus | |
2128 | * align the READ data correctly. This means that the GETATTR | |
2129 | * may end up partially falling into the page cache, and we should | |
2130 | * shift it into the 'tail' of the xdr_buf before processing. | |
2131 | * To do this efficiently, we need to know the total length | |
2132 | * of data received, which doesn't seem to be available outside | |
2133 | * of the RPC layer. | |
2134 | * | |
2135 | * In the case of WRITE, we also want to put the GETATTR after | |
2136 | * the operation -- in this case because we want to make sure | |
2137 | * we get the post-operation mtime and size. This means that | |
2138 | * we can't use xdr_encode_pages() as written: we need a variant | |
2139 | * of it which would leave room in the 'tail' iovec. | |
2140 | * | |
2141 | * Both of these changes to the XDR layer would in fact be quite | |
2142 | * minor, but I decided to leave them for a subsequent patch. | |
2143 | */ | |
2144 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2145 | unsigned int pgbase, unsigned int pglen) | |
2146 | { | |
2147 | struct nfs4_readlink args = { | |
2148 | .fh = NFS_FH(inode), | |
2149 | .pgbase = pgbase, | |
2150 | .pglen = pglen, | |
2151 | .pages = &page, | |
2152 | }; | |
f50c7000 | 2153 | struct nfs4_readlink_res res; |
1da177e4 LT |
2154 | struct rpc_message msg = { |
2155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2156 | .rpc_argp = &args, | |
f50c7000 | 2157 | .rpc_resp = &res, |
1da177e4 LT |
2158 | }; |
2159 | ||
cccef3b9 | 2160 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2161 | } |
2162 | ||
2163 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2164 | unsigned int pgbase, unsigned int pglen) | |
2165 | { | |
2166 | struct nfs4_exception exception = { }; | |
2167 | int err; | |
2168 | do { | |
2169 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2170 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2171 | &exception); | |
2172 | } while (exception.retry); | |
2173 | return err; | |
2174 | } | |
2175 | ||
1da177e4 LT |
2176 | /* |
2177 | * Got race? | |
2178 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2179 | * Until then, this create/open method is prone to inefficiency and race | |
2180 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2181 | * placed on the wire. | |
2182 | * | |
2183 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2184 | * The file will be opened again in the subsequent VFS open call | |
2185 | * (nfs4_proc_file_open). | |
2186 | * | |
2187 | * The open for read will just hang around to be used by any process that | |
2188 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2189 | */ | |
2190 | ||
2191 | static int | |
2192 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2193 | int flags, struct nameidata *nd) |
1da177e4 | 2194 | { |
ad389da7 | 2195 | struct path path = { |
4ac91378 | 2196 | .mnt = nd->path.mnt, |
ad389da7 TM |
2197 | .dentry = dentry, |
2198 | }; | |
1da177e4 LT |
2199 | struct nfs4_state *state; |
2200 | struct rpc_cred *cred; | |
dc0b027d | 2201 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2202 | int status = 0; |
2203 | ||
98a8e323 | 2204 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2205 | if (IS_ERR(cred)) { |
2206 | status = PTR_ERR(cred); | |
2207 | goto out; | |
2208 | } | |
dc0b027d | 2209 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2210 | d_drop(dentry); |
1da177e4 LT |
2211 | if (IS_ERR(state)) { |
2212 | status = PTR_ERR(state); | |
659bfcd6 | 2213 | goto out_putcred; |
1da177e4 | 2214 | } |
d4d9cdcb | 2215 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2216 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2217 | if (flags & O_EXCL) { |
2218 | struct nfs_fattr fattr; | |
659bfcd6 | 2219 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2220 | if (status == 0) |
65e4308d | 2221 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2222 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2223 | } |
ad389da7 | 2224 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2225 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2226 | else |
dc0b027d | 2227 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2228 | out_putcred: |
2229 | put_rpccred(cred); | |
1da177e4 LT |
2230 | out: |
2231 | return status; | |
2232 | } | |
2233 | ||
2234 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2235 | { | |
16e42959 | 2236 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2237 | struct nfs_removeargs args = { |
1da177e4 | 2238 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2239 | .name.len = name->len, |
2240 | .name.name = name->name, | |
16e42959 TM |
2241 | .bitmask = server->attr_bitmask, |
2242 | }; | |
4fdc17b2 | 2243 | struct nfs_removeres res = { |
16e42959 | 2244 | .server = server, |
1da177e4 | 2245 | }; |
1da177e4 | 2246 | struct rpc_message msg = { |
4fdc17b2 TM |
2247 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2248 | .rpc_argp = &args, | |
2249 | .rpc_resp = &res, | |
1da177e4 LT |
2250 | }; |
2251 | int status; | |
2252 | ||
4fdc17b2 | 2253 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2254 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2255 | if (status == 0) { |
2256 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2257 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2258 | } |
1da177e4 LT |
2259 | return status; |
2260 | } | |
2261 | ||
2262 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2263 | { | |
2264 | struct nfs4_exception exception = { }; | |
2265 | int err; | |
2266 | do { | |
2267 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2268 | _nfs4_proc_remove(dir, name), | |
2269 | &exception); | |
2270 | } while (exception.retry); | |
2271 | return err; | |
2272 | } | |
2273 | ||
e4eff1a6 | 2274 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2275 | { |
e4eff1a6 TM |
2276 | struct nfs_server *server = NFS_SERVER(dir); |
2277 | struct nfs_removeargs *args = msg->rpc_argp; | |
2278 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2279 | |
a65318bf | 2280 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2281 | res->server = server; |
1da177e4 | 2282 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2283 | } |
2284 | ||
e4eff1a6 | 2285 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2286 | { |
e4eff1a6 TM |
2287 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2288 | ||
9e33bed5 | 2289 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2290 | return 0; |
2291 | update_changeattr(dir, &res->cinfo); | |
2292 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2293 | return 1; | |
1da177e4 LT |
2294 | } |
2295 | ||
2296 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2297 | struct inode *new_dir, struct qstr *new_name) | |
2298 | { | |
6caf2c82 | 2299 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2300 | struct nfs4_rename_arg arg = { |
2301 | .old_dir = NFS_FH(old_dir), | |
2302 | .new_dir = NFS_FH(new_dir), | |
2303 | .old_name = old_name, | |
2304 | .new_name = new_name, | |
6caf2c82 TM |
2305 | .bitmask = server->attr_bitmask, |
2306 | }; | |
2307 | struct nfs_fattr old_fattr, new_fattr; | |
2308 | struct nfs4_rename_res res = { | |
2309 | .server = server, | |
2310 | .old_fattr = &old_fattr, | |
2311 | .new_fattr = &new_fattr, | |
1da177e4 | 2312 | }; |
1da177e4 LT |
2313 | struct rpc_message msg = { |
2314 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2315 | .rpc_argp = &arg, | |
2316 | .rpc_resp = &res, | |
2317 | }; | |
2318 | int status; | |
2319 | ||
6caf2c82 TM |
2320 | nfs_fattr_init(res.old_fattr); |
2321 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2322 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2323 | |
2324 | if (!status) { | |
2325 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2326 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2327 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2328 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2329 | } |
2330 | return status; | |
2331 | } | |
2332 | ||
2333 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2334 | struct inode *new_dir, struct qstr *new_name) | |
2335 | { | |
2336 | struct nfs4_exception exception = { }; | |
2337 | int err; | |
2338 | do { | |
2339 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2340 | _nfs4_proc_rename(old_dir, old_name, | |
2341 | new_dir, new_name), | |
2342 | &exception); | |
2343 | } while (exception.retry); | |
2344 | return err; | |
2345 | } | |
2346 | ||
2347 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2348 | { | |
91ba2eee | 2349 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2350 | struct nfs4_link_arg arg = { |
2351 | .fh = NFS_FH(inode), | |
2352 | .dir_fh = NFS_FH(dir), | |
2353 | .name = name, | |
91ba2eee TM |
2354 | .bitmask = server->attr_bitmask, |
2355 | }; | |
2356 | struct nfs_fattr fattr, dir_attr; | |
2357 | struct nfs4_link_res res = { | |
2358 | .server = server, | |
2359 | .fattr = &fattr, | |
2360 | .dir_attr = &dir_attr, | |
1da177e4 | 2361 | }; |
1da177e4 LT |
2362 | struct rpc_message msg = { |
2363 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2364 | .rpc_argp = &arg, | |
91ba2eee | 2365 | .rpc_resp = &res, |
1da177e4 LT |
2366 | }; |
2367 | int status; | |
2368 | ||
91ba2eee TM |
2369 | nfs_fattr_init(res.fattr); |
2370 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2371 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2372 | if (!status) { |
2373 | update_changeattr(dir, &res.cinfo); | |
2374 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2375 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2376 | } |
1da177e4 LT |
2377 | |
2378 | return status; | |
2379 | } | |
2380 | ||
2381 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2382 | { | |
2383 | struct nfs4_exception exception = { }; | |
2384 | int err; | |
2385 | do { | |
2386 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2387 | _nfs4_proc_link(inode, dir, name), | |
2388 | &exception); | |
2389 | } while (exception.retry); | |
2390 | return err; | |
2391 | } | |
2392 | ||
57dc9a57 TM |
2393 | struct nfs4_createdata { |
2394 | struct rpc_message msg; | |
2395 | struct nfs4_create_arg arg; | |
2396 | struct nfs4_create_res res; | |
2397 | struct nfs_fh fh; | |
2398 | struct nfs_fattr fattr; | |
2399 | struct nfs_fattr dir_fattr; | |
2400 | }; | |
2401 | ||
2402 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2403 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2404 | { | |
2405 | struct nfs4_createdata *data; | |
2406 | ||
2407 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2408 | if (data != NULL) { | |
2409 | struct nfs_server *server = NFS_SERVER(dir); | |
2410 | ||
2411 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2412 | data->msg.rpc_argp = &data->arg; | |
2413 | data->msg.rpc_resp = &data->res; | |
2414 | data->arg.dir_fh = NFS_FH(dir); | |
2415 | data->arg.server = server; | |
2416 | data->arg.name = name; | |
2417 | data->arg.attrs = sattr; | |
2418 | data->arg.ftype = ftype; | |
2419 | data->arg.bitmask = server->attr_bitmask; | |
2420 | data->res.server = server; | |
2421 | data->res.fh = &data->fh; | |
2422 | data->res.fattr = &data->fattr; | |
2423 | data->res.dir_fattr = &data->dir_fattr; | |
2424 | nfs_fattr_init(data->res.fattr); | |
2425 | nfs_fattr_init(data->res.dir_fattr); | |
2426 | } | |
2427 | return data; | |
2428 | } | |
2429 | ||
2430 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2431 | { | |
cccef3b9 AA |
2432 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2433 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2434 | if (status == 0) { |
2435 | update_changeattr(dir, &data->res.dir_cinfo); | |
2436 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2437 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2438 | } | |
2439 | return status; | |
2440 | } | |
2441 | ||
2442 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2443 | { | |
2444 | kfree(data); | |
2445 | } | |
2446 | ||
4f390c15 | 2447 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2448 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2449 | { |
57dc9a57 TM |
2450 | struct nfs4_createdata *data; |
2451 | int status = -ENAMETOOLONG; | |
1da177e4 | 2452 | |
94a6d753 | 2453 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2454 | goto out; |
4f390c15 | 2455 | |
57dc9a57 TM |
2456 | status = -ENOMEM; |
2457 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2458 | if (data == NULL) | |
2459 | goto out; | |
2460 | ||
2461 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2462 | data->arg.u.symlink.pages = &page; | |
2463 | data->arg.u.symlink.len = len; | |
1da177e4 | 2464 | |
57dc9a57 TM |
2465 | status = nfs4_do_create(dir, dentry, data); |
2466 | ||
2467 | nfs4_free_createdata(data); | |
2468 | out: | |
1da177e4 LT |
2469 | return status; |
2470 | } | |
2471 | ||
4f390c15 | 2472 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2473 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2474 | { |
2475 | struct nfs4_exception exception = { }; | |
2476 | int err; | |
2477 | do { | |
2478 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2479 | _nfs4_proc_symlink(dir, dentry, page, |
2480 | len, sattr), | |
1da177e4 LT |
2481 | &exception); |
2482 | } while (exception.retry); | |
2483 | return err; | |
2484 | } | |
2485 | ||
2486 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2487 | struct iattr *sattr) | |
2488 | { | |
57dc9a57 TM |
2489 | struct nfs4_createdata *data; |
2490 | int status = -ENOMEM; | |
1da177e4 | 2491 | |
57dc9a57 TM |
2492 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2493 | if (data == NULL) | |
2494 | goto out; | |
2495 | ||
2496 | status = nfs4_do_create(dir, dentry, data); | |
2497 | ||
2498 | nfs4_free_createdata(data); | |
2499 | out: | |
1da177e4 LT |
2500 | return status; |
2501 | } | |
2502 | ||
2503 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2504 | struct iattr *sattr) | |
2505 | { | |
2506 | struct nfs4_exception exception = { }; | |
2507 | int err; | |
2508 | do { | |
2509 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2510 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2511 | &exception); | |
2512 | } while (exception.retry); | |
2513 | return err; | |
2514 | } | |
2515 | ||
2516 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2517 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2518 | { | |
2519 | struct inode *dir = dentry->d_inode; | |
2520 | struct nfs4_readdir_arg args = { | |
2521 | .fh = NFS_FH(dir), | |
2522 | .pages = &page, | |
2523 | .pgbase = 0, | |
2524 | .count = count, | |
a65318bf | 2525 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, |
1da177e4 LT |
2526 | }; |
2527 | struct nfs4_readdir_res res; | |
2528 | struct rpc_message msg = { | |
2529 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2530 | .rpc_argp = &args, | |
2531 | .rpc_resp = &res, | |
2532 | .rpc_cred = cred, | |
2533 | }; | |
2534 | int status; | |
2535 | ||
3110ff80 | 2536 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2537 | dentry->d_parent->d_name.name, |
2538 | dentry->d_name.name, | |
2539 | (unsigned long long)cookie); | |
1da177e4 LT |
2540 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2541 | res.pgbase = args.pgbase; | |
cccef3b9 | 2542 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2543 | if (status == 0) |
2544 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2545 | |
2546 | nfs_invalidate_atime(dir); | |
2547 | ||
3110ff80 | 2548 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2549 | return status; |
2550 | } | |
2551 | ||
2552 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2553 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2554 | { | |
2555 | struct nfs4_exception exception = { }; | |
2556 | int err; | |
2557 | do { | |
2558 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2559 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2560 | page, count, plus), | |
2561 | &exception); | |
2562 | } while (exception.retry); | |
2563 | return err; | |
2564 | } | |
2565 | ||
2566 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2567 | struct iattr *sattr, dev_t rdev) | |
2568 | { | |
57dc9a57 TM |
2569 | struct nfs4_createdata *data; |
2570 | int mode = sattr->ia_mode; | |
2571 | int status = -ENOMEM; | |
1da177e4 LT |
2572 | |
2573 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2574 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2575 | |
2576 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2577 | if (data == NULL) | |
2578 | goto out; | |
2579 | ||
1da177e4 | 2580 | if (S_ISFIFO(mode)) |
57dc9a57 | 2581 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2582 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2583 | data->arg.ftype = NF4BLK; |
2584 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2585 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2586 | } |
2587 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2588 | data->arg.ftype = NF4CHR; |
2589 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2590 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2591 | } |
1da177e4 | 2592 | |
57dc9a57 TM |
2593 | status = nfs4_do_create(dir, dentry, data); |
2594 | ||
2595 | nfs4_free_createdata(data); | |
2596 | out: | |
1da177e4 LT |
2597 | return status; |
2598 | } | |
2599 | ||
2600 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2601 | struct iattr *sattr, dev_t rdev) | |
2602 | { | |
2603 | struct nfs4_exception exception = { }; | |
2604 | int err; | |
2605 | do { | |
2606 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2607 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2608 | &exception); | |
2609 | } while (exception.retry); | |
2610 | return err; | |
2611 | } | |
2612 | ||
2613 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2614 | struct nfs_fsstat *fsstat) | |
2615 | { | |
2616 | struct nfs4_statfs_arg args = { | |
2617 | .fh = fhandle, | |
2618 | .bitmask = server->attr_bitmask, | |
2619 | }; | |
24ad148a BH |
2620 | struct nfs4_statfs_res res = { |
2621 | .fsstat = fsstat, | |
2622 | }; | |
1da177e4 LT |
2623 | struct rpc_message msg = { |
2624 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2625 | .rpc_argp = &args, | |
24ad148a | 2626 | .rpc_resp = &res, |
1da177e4 LT |
2627 | }; |
2628 | ||
0e574af1 | 2629 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2630 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2631 | } |
2632 | ||
2633 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2634 | { | |
2635 | struct nfs4_exception exception = { }; | |
2636 | int err; | |
2637 | do { | |
2638 | err = nfs4_handle_exception(server, | |
2639 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2640 | &exception); | |
2641 | } while (exception.retry); | |
2642 | return err; | |
2643 | } | |
2644 | ||
2645 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2646 | struct nfs_fsinfo *fsinfo) | |
2647 | { | |
2648 | struct nfs4_fsinfo_arg args = { | |
2649 | .fh = fhandle, | |
2650 | .bitmask = server->attr_bitmask, | |
2651 | }; | |
3dda5e43 BH |
2652 | struct nfs4_fsinfo_res res = { |
2653 | .fsinfo = fsinfo, | |
2654 | }; | |
1da177e4 LT |
2655 | struct rpc_message msg = { |
2656 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2657 | .rpc_argp = &args, | |
3dda5e43 | 2658 | .rpc_resp = &res, |
1da177e4 LT |
2659 | }; |
2660 | ||
cccef3b9 | 2661 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2662 | } |
2663 | ||
2664 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2665 | { | |
2666 | struct nfs4_exception exception = { }; | |
2667 | int err; | |
2668 | ||
2669 | do { | |
2670 | err = nfs4_handle_exception(server, | |
2671 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2672 | &exception); | |
2673 | } while (exception.retry); | |
2674 | return err; | |
2675 | } | |
2676 | ||
2677 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2678 | { | |
0e574af1 | 2679 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2680 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2681 | } | |
2682 | ||
2683 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2684 | struct nfs_pathconf *pathconf) | |
2685 | { | |
2686 | struct nfs4_pathconf_arg args = { | |
2687 | .fh = fhandle, | |
2688 | .bitmask = server->attr_bitmask, | |
2689 | }; | |
d45b2989 BH |
2690 | struct nfs4_pathconf_res res = { |
2691 | .pathconf = pathconf, | |
2692 | }; | |
1da177e4 LT |
2693 | struct rpc_message msg = { |
2694 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2695 | .rpc_argp = &args, | |
d45b2989 | 2696 | .rpc_resp = &res, |
1da177e4 LT |
2697 | }; |
2698 | ||
2699 | /* None of the pathconf attributes are mandatory to implement */ | |
2700 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2701 | memset(pathconf, 0, sizeof(*pathconf)); | |
2702 | return 0; | |
2703 | } | |
2704 | ||
0e574af1 | 2705 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2706 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2707 | } |
2708 | ||
2709 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2710 | struct nfs_pathconf *pathconf) | |
2711 | { | |
2712 | struct nfs4_exception exception = { }; | |
2713 | int err; | |
2714 | ||
2715 | do { | |
2716 | err = nfs4_handle_exception(server, | |
2717 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2718 | &exception); | |
2719 | } while (exception.retry); | |
2720 | return err; | |
2721 | } | |
2722 | ||
ec06c096 | 2723 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2724 | { |
ec06c096 | 2725 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2726 | |
9e33bed5 | 2727 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
1da177e4 | 2728 | rpc_restart_call(task); |
ec06c096 | 2729 | return -EAGAIN; |
1da177e4 | 2730 | } |
8850df99 TM |
2731 | |
2732 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2733 | if (task->tk_status > 0) |
ec06c096 TM |
2734 | renew_lease(server, data->timestamp); |
2735 | return 0; | |
1da177e4 LT |
2736 | } |
2737 | ||
bdc7f021 | 2738 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2739 | { |
1da177e4 | 2740 | data->timestamp = jiffies; |
bdc7f021 | 2741 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2742 | } |
2743 | ||
788e7a89 | 2744 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2745 | { |
1da177e4 LT |
2746 | struct inode *inode = data->inode; |
2747 | ||
9e33bed5 | 2748 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
1da177e4 | 2749 | rpc_restart_call(task); |
788e7a89 | 2750 | return -EAGAIN; |
1da177e4 | 2751 | } |
4f9838c7 | 2752 | if (task->tk_status >= 0) { |
1da177e4 | 2753 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2754 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2755 | } |
788e7a89 | 2756 | return 0; |
1da177e4 LT |
2757 | } |
2758 | ||
bdc7f021 | 2759 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2760 | { |
bdc7f021 TM |
2761 | struct nfs_server *server = NFS_SERVER(data->inode); |
2762 | ||
a65318bf | 2763 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2764 | data->res.server = server; |
1da177e4 LT |
2765 | data->timestamp = jiffies; |
2766 | ||
bdc7f021 | 2767 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2768 | } |
2769 | ||
788e7a89 | 2770 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2771 | { |
1da177e4 LT |
2772 | struct inode *inode = data->inode; |
2773 | ||
9e33bed5 | 2774 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
1da177e4 | 2775 | rpc_restart_call(task); |
788e7a89 | 2776 | return -EAGAIN; |
1da177e4 | 2777 | } |
9e08a3c5 | 2778 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2779 | return 0; |
1da177e4 LT |
2780 | } |
2781 | ||
bdc7f021 | 2782 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2783 | { |
788e7a89 | 2784 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2785 | |
a65318bf | 2786 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2787 | data->res.server = server; |
bdc7f021 | 2788 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
2789 | } |
2790 | ||
2791 | /* | |
2792 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2793 | * standalone procedure for queueing an asynchronous RENEW. | |
2794 | */ | |
963d8fe5 | 2795 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2796 | { |
adfa6f98 | 2797 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2798 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2799 | |
2800 | if (task->tk_status < 0) { | |
95baa25c TM |
2801 | /* Unless we're shutting down, schedule state recovery! */ |
2802 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
2803 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
2804 | return; |
2805 | } | |
2806 | spin_lock(&clp->cl_lock); | |
2807 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2808 | clp->cl_last_renewal = timestamp; | |
2809 | spin_unlock(&clp->cl_lock); | |
2810 | } | |
2811 | ||
963d8fe5 TM |
2812 | static const struct rpc_call_ops nfs4_renew_ops = { |
2813 | .rpc_call_done = nfs4_renew_done, | |
2814 | }; | |
2815 | ||
adfa6f98 | 2816 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2817 | { |
2818 | struct rpc_message msg = { | |
2819 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2820 | .rpc_argp = clp, | |
b4454fe1 | 2821 | .rpc_cred = cred, |
1da177e4 LT |
2822 | }; |
2823 | ||
2824 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2825 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2826 | } |
2827 | ||
adfa6f98 | 2828 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2829 | { |
2830 | struct rpc_message msg = { | |
2831 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2832 | .rpc_argp = clp, | |
b4454fe1 | 2833 | .rpc_cred = cred, |
1da177e4 LT |
2834 | }; |
2835 | unsigned long now = jiffies; | |
2836 | int status; | |
2837 | ||
2838 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2839 | if (status < 0) | |
2840 | return status; | |
2841 | spin_lock(&clp->cl_lock); | |
2842 | if (time_before(clp->cl_last_renewal,now)) | |
2843 | clp->cl_last_renewal = now; | |
2844 | spin_unlock(&clp->cl_lock); | |
2845 | return 0; | |
2846 | } | |
2847 | ||
aa1870af BF |
2848 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
2849 | { | |
2850 | return (server->caps & NFS_CAP_ACLS) | |
2851 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
2852 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
2853 | } | |
2854 | ||
2855 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
2856 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
2857 | * the stack. | |
2858 | */ | |
2859 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
2860 | ||
2861 | static void buf_to_pages(const void *buf, size_t buflen, | |
2862 | struct page **pages, unsigned int *pgbase) | |
2863 | { | |
2864 | const void *p = buf; | |
2865 | ||
2866 | *pgbase = offset_in_page(buf); | |
2867 | p -= *pgbase; | |
2868 | while (p < buf + buflen) { | |
2869 | *(pages++) = virt_to_page(p); | |
2870 | p += PAGE_CACHE_SIZE; | |
2871 | } | |
2872 | } | |
2873 | ||
e50a1c2e BF |
2874 | struct nfs4_cached_acl { |
2875 | int cached; | |
2876 | size_t len; | |
3e9d4154 | 2877 | char data[0]; |
e50a1c2e BF |
2878 | }; |
2879 | ||
2880 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
2881 | { | |
2882 | struct nfs_inode *nfsi = NFS_I(inode); | |
2883 | ||
2884 | spin_lock(&inode->i_lock); | |
2885 | kfree(nfsi->nfs4_acl); | |
2886 | nfsi->nfs4_acl = acl; | |
2887 | spin_unlock(&inode->i_lock); | |
2888 | } | |
2889 | ||
2890 | static void nfs4_zap_acl_attr(struct inode *inode) | |
2891 | { | |
2892 | nfs4_set_cached_acl(inode, NULL); | |
2893 | } | |
2894 | ||
2895 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
2896 | { | |
2897 | struct nfs_inode *nfsi = NFS_I(inode); | |
2898 | struct nfs4_cached_acl *acl; | |
2899 | int ret = -ENOENT; | |
2900 | ||
2901 | spin_lock(&inode->i_lock); | |
2902 | acl = nfsi->nfs4_acl; | |
2903 | if (acl == NULL) | |
2904 | goto out; | |
2905 | if (buf == NULL) /* user is just asking for length */ | |
2906 | goto out_len; | |
2907 | if (acl->cached == 0) | |
2908 | goto out; | |
2909 | ret = -ERANGE; /* see getxattr(2) man page */ | |
2910 | if (acl->len > buflen) | |
2911 | goto out; | |
2912 | memcpy(buf, acl->data, acl->len); | |
2913 | out_len: | |
2914 | ret = acl->len; | |
2915 | out: | |
2916 | spin_unlock(&inode->i_lock); | |
2917 | return ret; | |
2918 | } | |
2919 | ||
2920 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
2921 | { | |
2922 | struct nfs4_cached_acl *acl; | |
2923 | ||
2924 | if (buf && acl_len <= PAGE_SIZE) { | |
2925 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
2926 | if (acl == NULL) | |
2927 | goto out; | |
2928 | acl->cached = 1; | |
2929 | memcpy(acl->data, buf, acl_len); | |
2930 | } else { | |
2931 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
2932 | if (acl == NULL) | |
2933 | goto out; | |
2934 | acl->cached = 0; | |
2935 | } | |
2936 | acl->len = acl_len; | |
2937 | out: | |
2938 | nfs4_set_cached_acl(inode, acl); | |
2939 | } | |
2940 | ||
16b4289c | 2941 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 2942 | { |
aa1870af BF |
2943 | struct page *pages[NFS4ACL_MAXPAGES]; |
2944 | struct nfs_getaclargs args = { | |
2945 | .fh = NFS_FH(inode), | |
2946 | .acl_pages = pages, | |
2947 | .acl_len = buflen, | |
2948 | }; | |
663c79b3 BH |
2949 | struct nfs_getaclres res = { |
2950 | .acl_len = buflen, | |
2951 | }; | |
e50a1c2e | 2952 | void *resp_buf; |
aa1870af BF |
2953 | struct rpc_message msg = { |
2954 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
2955 | .rpc_argp = &args, | |
663c79b3 | 2956 | .rpc_resp = &res, |
aa1870af | 2957 | }; |
e50a1c2e | 2958 | struct page *localpage = NULL; |
aa1870af BF |
2959 | int ret; |
2960 | ||
e50a1c2e BF |
2961 | if (buflen < PAGE_SIZE) { |
2962 | /* As long as we're doing a round trip to the server anyway, | |
2963 | * let's be prepared for a page of acl data. */ | |
2964 | localpage = alloc_page(GFP_KERNEL); | |
2965 | resp_buf = page_address(localpage); | |
2966 | if (localpage == NULL) | |
2967 | return -ENOMEM; | |
2968 | args.acl_pages[0] = localpage; | |
2969 | args.acl_pgbase = 0; | |
663c79b3 | 2970 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
2971 | } else { |
2972 | resp_buf = buf; | |
2973 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
2974 | } | |
cccef3b9 | 2975 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
2976 | if (ret) |
2977 | goto out_free; | |
663c79b3 BH |
2978 | if (res.acl_len > args.acl_len) |
2979 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 2980 | else |
663c79b3 | 2981 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
2982 | if (buf) { |
2983 | ret = -ERANGE; | |
663c79b3 | 2984 | if (res.acl_len > buflen) |
e50a1c2e BF |
2985 | goto out_free; |
2986 | if (localpage) | |
663c79b3 | 2987 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 2988 | } |
663c79b3 | 2989 | ret = res.acl_len; |
e50a1c2e BF |
2990 | out_free: |
2991 | if (localpage) | |
2992 | __free_page(localpage); | |
aa1870af BF |
2993 | return ret; |
2994 | } | |
2995 | ||
16b4289c TM |
2996 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
2997 | { | |
2998 | struct nfs4_exception exception = { }; | |
2999 | ssize_t ret; | |
3000 | do { | |
3001 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3002 | if (ret >= 0) | |
3003 | break; | |
3004 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3005 | } while (exception.retry); | |
3006 | return ret; | |
3007 | } | |
3008 | ||
e50a1c2e BF |
3009 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3010 | { | |
3011 | struct nfs_server *server = NFS_SERVER(inode); | |
3012 | int ret; | |
3013 | ||
3014 | if (!nfs4_server_supports_acls(server)) | |
3015 | return -EOPNOTSUPP; | |
3016 | ret = nfs_revalidate_inode(server, inode); | |
3017 | if (ret < 0) | |
3018 | return ret; | |
f41f7418 TM |
3019 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
3020 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
3021 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
3022 | if (ret != -ENOENT) | |
3023 | return ret; | |
3024 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3025 | } | |
3026 | ||
16b4289c | 3027 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3028 | { |
3029 | struct nfs_server *server = NFS_SERVER(inode); | |
3030 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3031 | struct nfs_setaclargs arg = { | |
3032 | .fh = NFS_FH(inode), | |
3033 | .acl_pages = pages, | |
3034 | .acl_len = buflen, | |
3035 | }; | |
73c403a9 | 3036 | struct nfs_setaclres res; |
4b580ee3 BF |
3037 | struct rpc_message msg = { |
3038 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3039 | .rpc_argp = &arg, | |
73c403a9 | 3040 | .rpc_resp = &res, |
4b580ee3 BF |
3041 | }; |
3042 | int ret; | |
3043 | ||
3044 | if (!nfs4_server_supports_acls(server)) | |
3045 | return -EOPNOTSUPP; | |
642ac549 | 3046 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3047 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3048 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3049 | nfs_access_zap_cache(inode); |
3050 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3051 | return ret; |
3052 | } | |
3053 | ||
16b4289c TM |
3054 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3055 | { | |
3056 | struct nfs4_exception exception = { }; | |
3057 | int err; | |
3058 | do { | |
3059 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3060 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3061 | &exception); | |
3062 | } while (exception.retry); | |
3063 | return err; | |
3064 | } | |
3065 | ||
1da177e4 | 3066 | static int |
9e33bed5 | 3067 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 3068 | { |
7539bbab | 3069 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
3070 | |
3071 | if (!clp || task->tk_status >= 0) | |
3072 | return 0; | |
3073 | switch(task->tk_status) { | |
9e33bed5 TM |
3074 | case -NFS4ERR_ADMIN_REVOKED: |
3075 | case -NFS4ERR_BAD_STATEID: | |
3076 | case -NFS4ERR_OPENMODE: | |
3077 | if (state == NULL) | |
3078 | break; | |
3079 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
3080 | case -NFS4ERR_STALE_CLIENTID: |
3081 | case -NFS4ERR_STALE_STATEID: | |
3082 | case -NFS4ERR_EXPIRED: | |
5d00837b | 3083 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 3084 | nfs4_schedule_state_recovery(clp); |
e005e804 | 3085 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 3086 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
3087 | task->tk_status = 0; |
3088 | return -EAGAIN; | |
1da177e4 | 3089 | case -NFS4ERR_DELAY: |
2e96d286 | 3090 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 3091 | case -NFS4ERR_GRACE: |
1da177e4 LT |
3092 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3093 | task->tk_status = 0; | |
3094 | return -EAGAIN; | |
3095 | case -NFS4ERR_OLD_STATEID: | |
3096 | task->tk_status = 0; | |
3097 | return -EAGAIN; | |
3098 | } | |
3099 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3100 | return 0; | |
3101 | } | |
3102 | ||
adfa6f98 | 3103 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
3104 | { |
3105 | nfs4_verifier sc_verifier; | |
3106 | struct nfs4_setclientid setclientid = { | |
3107 | .sc_verifier = &sc_verifier, | |
3108 | .sc_prog = program, | |
3109 | }; | |
3110 | struct rpc_message msg = { | |
3111 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3112 | .rpc_argp = &setclientid, | |
3113 | .rpc_resp = clp, | |
286d7d6a | 3114 | .rpc_cred = cred, |
1da177e4 | 3115 | }; |
bc4785cd | 3116 | __be32 *p; |
1da177e4 LT |
3117 | int loop = 0; |
3118 | int status; | |
3119 | ||
bc4785cd | 3120 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3121 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3122 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3123 | ||
3124 | for(;;) { | |
3125 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3126 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3127 | clp->cl_ipaddr, |
3128 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3129 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3130 | rpc_peeraddr2str(clp->cl_rpcclient, |
3131 | RPC_DISPLAY_PROTO), | |
78ea323b | 3132 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3133 | clp->cl_id_uniquifier); |
3134 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3135 | sizeof(setclientid.sc_netid), |
3136 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3137 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3138 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3139 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3140 | clp->cl_ipaddr, port >> 8, port & 255); |
3141 | ||
3142 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3143 | if (status != -NFS4ERR_CLID_INUSE) | |
3144 | break; | |
3145 | if (signalled()) | |
3146 | break; | |
3147 | if (loop++ & 1) | |
3148 | ssleep(clp->cl_lease_time + 1); | |
3149 | else | |
3150 | if (++clp->cl_id_uniquifier == 0) | |
3151 | break; | |
3152 | } | |
3153 | return status; | |
3154 | } | |
3155 | ||
adfa6f98 | 3156 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3157 | { |
3158 | struct nfs_fsinfo fsinfo; | |
3159 | struct rpc_message msg = { | |
3160 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3161 | .rpc_argp = clp, | |
3162 | .rpc_resp = &fsinfo, | |
286d7d6a | 3163 | .rpc_cred = cred, |
1da177e4 LT |
3164 | }; |
3165 | unsigned long now; | |
3166 | int status; | |
3167 | ||
3168 | now = jiffies; | |
3169 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3170 | if (status == 0) { | |
3171 | spin_lock(&clp->cl_lock); | |
3172 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3173 | clp->cl_last_renewal = now; | |
3174 | spin_unlock(&clp->cl_lock); | |
3175 | } | |
3176 | return status; | |
3177 | } | |
3178 | ||
adfa6f98 | 3179 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3180 | { |
77e03677 | 3181 | long timeout = 0; |
51581f3b TM |
3182 | int err; |
3183 | do { | |
3184 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3185 | switch (err) { | |
3186 | case 0: | |
3187 | return err; | |
3188 | case -NFS4ERR_RESOURCE: | |
3189 | /* The IBM lawyers misread another document! */ | |
3190 | case -NFS4ERR_DELAY: | |
3191 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3192 | } | |
3193 | } while (err == 0); | |
3194 | return err; | |
3195 | } | |
3196 | ||
fe650407 TM |
3197 | struct nfs4_delegreturndata { |
3198 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3199 | struct nfs4_delegreturnres res; |
fe650407 TM |
3200 | struct nfs_fh fh; |
3201 | nfs4_stateid stateid; | |
26e976a8 | 3202 | unsigned long timestamp; |
fa178f29 | 3203 | struct nfs_fattr fattr; |
fe650407 TM |
3204 | int rpc_status; |
3205 | }; | |
3206 | ||
fe650407 TM |
3207 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3208 | { | |
3209 | struct nfs4_delegreturndata *data = calldata; | |
3210 | data->rpc_status = task->tk_status; | |
26e976a8 | 3211 | if (data->rpc_status == 0) |
fa178f29 | 3212 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3213 | } |
3214 | ||
3215 | static void nfs4_delegreturn_release(void *calldata) | |
3216 | { | |
fe650407 TM |
3217 | kfree(calldata); |
3218 | } | |
3219 | ||
c8d149f3 | 3220 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
fe650407 TM |
3221 | .rpc_call_done = nfs4_delegreturn_done, |
3222 | .rpc_release = nfs4_delegreturn_release, | |
3223 | }; | |
3224 | ||
e6f81075 | 3225 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3226 | { |
3227 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3228 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3229 | struct rpc_task *task; |
5138fde0 TM |
3230 | struct rpc_message msg = { |
3231 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3232 | .rpc_cred = cred, | |
3233 | }; | |
c970aa85 TM |
3234 | struct rpc_task_setup task_setup_data = { |
3235 | .rpc_client = server->client, | |
5138fde0 | 3236 | .rpc_message = &msg, |
c970aa85 TM |
3237 | .callback_ops = &nfs4_delegreturn_ops, |
3238 | .flags = RPC_TASK_ASYNC, | |
3239 | }; | |
e6f81075 | 3240 | int status = 0; |
fe650407 TM |
3241 | |
3242 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
3243 | if (data == NULL) | |
3244 | return -ENOMEM; | |
3245 | data->args.fhandle = &data->fh; | |
3246 | data->args.stateid = &data->stateid; | |
fa178f29 | 3247 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3248 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3249 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3250 | data->res.fattr = &data->fattr; |
3251 | data->res.server = server; | |
5f7dbd5c | 3252 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3253 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3254 | data->timestamp = jiffies; |
fe650407 TM |
3255 | data->rpc_status = 0; |
3256 | ||
c970aa85 | 3257 | task_setup_data.callback_data = data; |
5138fde0 TM |
3258 | msg.rpc_argp = &data->args, |
3259 | msg.rpc_resp = &data->res, | |
c970aa85 | 3260 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3261 | if (IS_ERR(task)) |
fe650407 | 3262 | return PTR_ERR(task); |
e6f81075 TM |
3263 | if (!issync) |
3264 | goto out; | |
fe650407 | 3265 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3266 | if (status != 0) |
3267 | goto out; | |
3268 | status = data->rpc_status; | |
3269 | if (status != 0) | |
3270 | goto out; | |
3271 | nfs_refresh_inode(inode, &data->fattr); | |
3272 | out: | |
e6b3c4db | 3273 | rpc_put_task(task); |
fe650407 | 3274 | return status; |
1da177e4 LT |
3275 | } |
3276 | ||
e6f81075 | 3277 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3278 | { |
3279 | struct nfs_server *server = NFS_SERVER(inode); | |
3280 | struct nfs4_exception exception = { }; | |
3281 | int err; | |
3282 | do { | |
e6f81075 | 3283 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3284 | switch (err) { |
3285 | case -NFS4ERR_STALE_STATEID: | |
3286 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3287 | case 0: |
3288 | return 0; | |
3289 | } | |
3290 | err = nfs4_handle_exception(server, err, &exception); | |
3291 | } while (exception.retry); | |
3292 | return err; | |
3293 | } | |
3294 | ||
3295 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3296 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3297 | ||
3298 | /* | |
3299 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3300 | */ | |
3301 | static unsigned long | |
3302 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3303 | { | |
150030b7 | 3304 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3305 | timeout <<= 1; |
3306 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3307 | return NFS4_LOCK_MAXTIMEOUT; | |
3308 | return timeout; | |
3309 | } | |
3310 | ||
1da177e4 LT |
3311 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3312 | { | |
3313 | struct inode *inode = state->inode; | |
3314 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3315 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3316 | struct nfs_lockt_args arg = { |
1da177e4 | 3317 | .fh = NFS_FH(inode), |
911d1aaf | 3318 | .fl = request, |
1da177e4 | 3319 | }; |
911d1aaf TM |
3320 | struct nfs_lockt_res res = { |
3321 | .denied = request, | |
1da177e4 LT |
3322 | }; |
3323 | struct rpc_message msg = { | |
3324 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3325 | .rpc_argp = &arg, | |
3326 | .rpc_resp = &res, | |
3327 | .rpc_cred = state->owner->so_cred, | |
3328 | }; | |
1da177e4 LT |
3329 | struct nfs4_lock_state *lsp; |
3330 | int status; | |
3331 | ||
911d1aaf | 3332 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3333 | status = nfs4_set_lock_state(state, request); |
3334 | if (status != 0) | |
3335 | goto out; | |
3336 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3337 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3338 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3339 | switch (status) { |
3340 | case 0: | |
3341 | request->fl_type = F_UNLCK; | |
3342 | break; | |
3343 | case -NFS4ERR_DENIED: | |
3344 | status = 0; | |
1da177e4 | 3345 | } |
70cc6487 | 3346 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3347 | out: |
1da177e4 LT |
3348 | return status; |
3349 | } | |
3350 | ||
3351 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3352 | { | |
3353 | struct nfs4_exception exception = { }; | |
3354 | int err; | |
3355 | ||
3356 | do { | |
3357 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3358 | _nfs4_proc_getlk(state, cmd, request), | |
3359 | &exception); | |
3360 | } while (exception.retry); | |
3361 | return err; | |
3362 | } | |
3363 | ||
3364 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3365 | { | |
3366 | int res = 0; | |
3367 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3368 | case FL_POSIX: | |
3369 | res = posix_lock_file_wait(file, fl); | |
3370 | break; | |
3371 | case FL_FLOCK: | |
3372 | res = flock_lock_file_wait(file, fl); | |
3373 | break; | |
3374 | default: | |
3375 | BUG(); | |
3376 | } | |
1da177e4 LT |
3377 | return res; |
3378 | } | |
3379 | ||
faf5f49c | 3380 | struct nfs4_unlockdata { |
911d1aaf TM |
3381 | struct nfs_locku_args arg; |
3382 | struct nfs_locku_res res; | |
faf5f49c TM |
3383 | struct nfs4_lock_state *lsp; |
3384 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3385 | struct file_lock fl; |
3386 | const struct nfs_server *server; | |
26e976a8 | 3387 | unsigned long timestamp; |
faf5f49c TM |
3388 | }; |
3389 | ||
911d1aaf TM |
3390 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3391 | struct nfs_open_context *ctx, | |
3392 | struct nfs4_lock_state *lsp, | |
3393 | struct nfs_seqid *seqid) | |
3394 | { | |
3395 | struct nfs4_unlockdata *p; | |
3396 | struct inode *inode = lsp->ls_state->inode; | |
3397 | ||
3398 | p = kmalloc(sizeof(*p), GFP_KERNEL); | |
3399 | if (p == NULL) | |
3400 | return NULL; | |
3401 | p->arg.fh = NFS_FH(inode); | |
3402 | p->arg.fl = &p->fl; | |
3403 | p->arg.seqid = seqid; | |
c1d51931 | 3404 | p->res.seqid = seqid; |
5f7dbd5c | 3405 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3406 | p->arg.stateid = &lsp->ls_stateid; |
3407 | p->lsp = lsp; | |
3408 | atomic_inc(&lsp->ls_count); | |
3409 | /* Ensure we don't close file until we're done freeing locks! */ | |
3410 | p->ctx = get_nfs_open_context(ctx); | |
3411 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3412 | p->server = NFS_SERVER(inode); | |
3413 | return p; | |
3414 | } | |
3415 | ||
06f814a3 | 3416 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3417 | { |
963d8fe5 | 3418 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3419 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3420 | nfs4_put_lock_state(calldata->lsp); |
3421 | put_nfs_open_context(calldata->ctx); | |
3422 | kfree(calldata); | |
faf5f49c TM |
3423 | } |
3424 | ||
963d8fe5 | 3425 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3426 | { |
963d8fe5 | 3427 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3428 | |
06f814a3 TM |
3429 | if (RPC_ASSASSINATED(task)) |
3430 | return; | |
faf5f49c TM |
3431 | switch (task->tk_status) { |
3432 | case 0: | |
3433 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3434 | calldata->res.stateid.data, |
faf5f49c | 3435 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3436 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3437 | break; |
9e33bed5 TM |
3438 | case -NFS4ERR_BAD_STATEID: |
3439 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3440 | case -NFS4ERR_STALE_STATEID: |
3441 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3442 | break; |
3443 | default: | |
9e33bed5 | 3444 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
faf5f49c | 3445 | rpc_restart_call(task); |
faf5f49c | 3446 | } |
faf5f49c TM |
3447 | } |
3448 | ||
4ce70ada | 3449 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3450 | { |
4ce70ada | 3451 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3452 | |
911d1aaf | 3453 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3454 | return; |
3455 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3456 | /* Note: exit _without_ running nfs4_locku_done */ |
3457 | task->tk_action = NULL; | |
faf5f49c TM |
3458 | return; |
3459 | } | |
26e976a8 | 3460 | calldata->timestamp = jiffies; |
5138fde0 | 3461 | rpc_call_start(task); |
faf5f49c TM |
3462 | } |
3463 | ||
963d8fe5 | 3464 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3465 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3466 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3467 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3468 | }; |
3469 | ||
a5d16a4d TM |
3470 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3471 | struct nfs_open_context *ctx, | |
3472 | struct nfs4_lock_state *lsp, | |
3473 | struct nfs_seqid *seqid) | |
3474 | { | |
3475 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3476 | struct rpc_message msg = { |
3477 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3478 | .rpc_cred = ctx->cred, | |
3479 | }; | |
c970aa85 TM |
3480 | struct rpc_task_setup task_setup_data = { |
3481 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3482 | .rpc_message = &msg, |
c970aa85 | 3483 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3484 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3485 | .flags = RPC_TASK_ASYNC, |
3486 | }; | |
a5d16a4d | 3487 | |
137d6aca FF |
3488 | /* Ensure this is an unlock - when canceling a lock, the |
3489 | * canceled lock is passed in, and it won't be an unlock. | |
3490 | */ | |
3491 | fl->fl_type = F_UNLCK; | |
3492 | ||
a5d16a4d TM |
3493 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3494 | if (data == NULL) { | |
3495 | nfs_free_seqid(seqid); | |
3496 | return ERR_PTR(-ENOMEM); | |
3497 | } | |
3498 | ||
5138fde0 TM |
3499 | msg.rpc_argp = &data->arg, |
3500 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3501 | task_setup_data.callback_data = data; |
3502 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3503 | } |
3504 | ||
faf5f49c TM |
3505 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3506 | { | |
19e03c57 | 3507 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3508 | struct nfs_seqid *seqid; |
1da177e4 | 3509 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3510 | struct rpc_task *task; |
3511 | int status = 0; | |
536ff0f8 | 3512 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3513 | |
8d0a8a9d | 3514 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3515 | /* Unlock _before_ we do the RPC call */ |
3516 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3517 | down_read(&nfsi->rwsem); |
3518 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3519 | up_read(&nfsi->rwsem); | |
9b073574 | 3520 | goto out; |
19e03c57 TM |
3521 | } |
3522 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3523 | if (status != 0) |
9b073574 TM |
3524 | goto out; |
3525 | /* Is this a delegated lock? */ | |
3526 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3527 | goto out; | |
8d0a8a9d | 3528 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3529 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3530 | status = -ENOMEM; |
911d1aaf | 3531 | if (seqid == NULL) |
9b073574 | 3532 | goto out; |
cd3758e3 | 3533 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3534 | status = PTR_ERR(task); |
3535 | if (IS_ERR(task)) | |
9b073574 | 3536 | goto out; |
a5d16a4d | 3537 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3538 | rpc_put_task(task); |
9b073574 | 3539 | out: |
536ff0f8 | 3540 | request->fl_flags = fl_flags; |
1da177e4 LT |
3541 | return status; |
3542 | } | |
3543 | ||
a5d16a4d TM |
3544 | struct nfs4_lockdata { |
3545 | struct nfs_lock_args arg; | |
3546 | struct nfs_lock_res res; | |
3547 | struct nfs4_lock_state *lsp; | |
3548 | struct nfs_open_context *ctx; | |
3549 | struct file_lock fl; | |
26e976a8 | 3550 | unsigned long timestamp; |
a5d16a4d TM |
3551 | int rpc_status; |
3552 | int cancelled; | |
3553 | }; | |
3554 | ||
3555 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3556 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3557 | { |
a5d16a4d TM |
3558 | struct nfs4_lockdata *p; |
3559 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3560 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3561 | |
3562 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3563 | if (p == NULL) | |
3564 | return NULL; | |
3565 | ||
3566 | p->arg.fh = NFS_FH(inode); | |
3567 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3568 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3569 | if (p->arg.open_seqid == NULL) | |
3570 | goto out_free; | |
a5d16a4d TM |
3571 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3572 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3573 | goto out_free_seqid; |
a5d16a4d | 3574 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3575 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3576 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3577 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 3578 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d TM |
3579 | p->lsp = lsp; |
3580 | atomic_inc(&lsp->ls_count); | |
3581 | p->ctx = get_nfs_open_context(ctx); | |
3582 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3583 | return p; | |
2f74c0a0 TM |
3584 | out_free_seqid: |
3585 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3586 | out_free: |
3587 | kfree(p); | |
3588 | return NULL; | |
3589 | } | |
3590 | ||
3591 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3592 | { | |
3593 | struct nfs4_lockdata *data = calldata; | |
3594 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3595 | |
3110ff80 | 3596 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3597 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3598 | return; | |
a5d16a4d TM |
3599 | /* Do we need to do an open_to_lock_owner? */ |
3600 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3601 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3602 | return; | |
a5d16a4d TM |
3603 | data->arg.open_stateid = &state->stateid; |
3604 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3605 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3606 | } else |
3607 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3608 | data->timestamp = jiffies; |
5138fde0 | 3609 | rpc_call_start(task); |
3110ff80 | 3610 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3611 | } |
3612 | ||
3613 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3614 | { | |
3615 | struct nfs4_lockdata *data = calldata; | |
3616 | ||
3110ff80 | 3617 | dprintk("%s: begin!\n", __func__); |
a5d16a4d TM |
3618 | |
3619 | data->rpc_status = task->tk_status; | |
3620 | if (RPC_ASSASSINATED(task)) | |
3621 | goto out; | |
3622 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3623 | if (data->rpc_status == 0) |
3624 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3625 | else | |
3626 | goto out; | |
3627 | } | |
3628 | if (data->rpc_status == 0) { | |
3629 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3630 | sizeof(data->lsp->ls_stateid.data)); | |
3631 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3632 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3633 | } |
a5d16a4d | 3634 | out: |
3110ff80 | 3635 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3636 | } |
3637 | ||
3638 | static void nfs4_lock_release(void *calldata) | |
3639 | { | |
3640 | struct nfs4_lockdata *data = calldata; | |
3641 | ||
3110ff80 | 3642 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3643 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3644 | if (data->cancelled != 0) { |
3645 | struct rpc_task *task; | |
3646 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3647 | data->arg.lock_seqid); | |
3648 | if (!IS_ERR(task)) | |
e6b3c4db | 3649 | rpc_put_task(task); |
3110ff80 | 3650 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3651 | } else |
3652 | nfs_free_seqid(data->arg.lock_seqid); | |
3653 | nfs4_put_lock_state(data->lsp); | |
3654 | put_nfs_open_context(data->ctx); | |
3655 | kfree(data); | |
3110ff80 | 3656 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3657 | } |
3658 | ||
3659 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3660 | .rpc_call_prepare = nfs4_lock_prepare, | |
3661 | .rpc_call_done = nfs4_lock_done, | |
3662 | .rpc_release = nfs4_lock_release, | |
3663 | }; | |
3664 | ||
3665 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3666 | { | |
3667 | struct nfs4_lockdata *data; | |
3668 | struct rpc_task *task; | |
5138fde0 TM |
3669 | struct rpc_message msg = { |
3670 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3671 | .rpc_cred = state->owner->so_cred, | |
3672 | }; | |
c970aa85 TM |
3673 | struct rpc_task_setup task_setup_data = { |
3674 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3675 | .rpc_message = &msg, |
c970aa85 | 3676 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3677 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3678 | .flags = RPC_TASK_ASYNC, |
3679 | }; | |
a5d16a4d TM |
3680 | int ret; |
3681 | ||
3110ff80 | 3682 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3683 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3684 | fl->fl_u.nfs4_fl.owner); |
3685 | if (data == NULL) | |
3686 | return -ENOMEM; | |
3687 | if (IS_SETLKW(cmd)) | |
3688 | data->arg.block = 1; | |
3689 | if (reclaim != 0) | |
3690 | data->arg.reclaim = 1; | |
5138fde0 TM |
3691 | msg.rpc_argp = &data->arg, |
3692 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3693 | task_setup_data.callback_data = data; |
3694 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3695 | if (IS_ERR(task)) |
a5d16a4d | 3696 | return PTR_ERR(task); |
a5d16a4d TM |
3697 | ret = nfs4_wait_for_completion_rpc_task(task); |
3698 | if (ret == 0) { | |
3699 | ret = data->rpc_status; | |
3700 | if (ret == -NFS4ERR_DENIED) | |
3701 | ret = -EAGAIN; | |
3702 | } else | |
3703 | data->cancelled = 1; | |
e6b3c4db | 3704 | rpc_put_task(task); |
3110ff80 | 3705 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3706 | return ret; |
1da177e4 LT |
3707 | } |
3708 | ||
3709 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3710 | { | |
202b50dc TM |
3711 | struct nfs_server *server = NFS_SERVER(state->inode); |
3712 | struct nfs4_exception exception = { }; | |
3713 | int err; | |
3714 | ||
3715 | do { | |
42a2d13e TM |
3716 | /* Cache the lock if possible... */ |
3717 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3718 | return 0; | |
202b50dc TM |
3719 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3720 | if (err != -NFS4ERR_DELAY) | |
3721 | break; | |
3722 | nfs4_handle_exception(server, err, &exception); | |
3723 | } while (exception.retry); | |
3724 | return err; | |
1da177e4 LT |
3725 | } |
3726 | ||
3727 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3728 | { | |
202b50dc TM |
3729 | struct nfs_server *server = NFS_SERVER(state->inode); |
3730 | struct nfs4_exception exception = { }; | |
3731 | int err; | |
3732 | ||
6bfc93ef TM |
3733 | err = nfs4_set_lock_state(state, request); |
3734 | if (err != 0) | |
3735 | return err; | |
202b50dc | 3736 | do { |
42a2d13e TM |
3737 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3738 | return 0; | |
202b50dc TM |
3739 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3740 | if (err != -NFS4ERR_DELAY) | |
3741 | break; | |
3742 | nfs4_handle_exception(server, err, &exception); | |
3743 | } while (exception.retry); | |
3744 | return err; | |
1da177e4 LT |
3745 | } |
3746 | ||
3747 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3748 | { | |
19e03c57 | 3749 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 3750 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3751 | int status; |
3752 | ||
6bfc93ef | 3753 | /* Is this a delegated open? */ |
6bfc93ef TM |
3754 | status = nfs4_set_lock_state(state, request); |
3755 | if (status != 0) | |
3756 | goto out; | |
01c3b861 TM |
3757 | request->fl_flags |= FL_ACCESS; |
3758 | status = do_vfs_lock(request->fl_file, request); | |
3759 | if (status < 0) | |
3760 | goto out; | |
19e03c57 | 3761 | down_read(&nfsi->rwsem); |
01c3b861 | 3762 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 3763 | /* Yes: cache locks! */ |
01c3b861 | 3764 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
3765 | request->fl_flags = fl_flags & ~FL_SLEEP; |
3766 | status = do_vfs_lock(request->fl_file, request); | |
3767 | goto out_unlock; | |
01c3b861 | 3768 | } |
6bfc93ef TM |
3769 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3770 | if (status != 0) | |
01c3b861 | 3771 | goto out_unlock; |
6bfc93ef | 3772 | /* Note: we always want to sleep here! */ |
01c3b861 | 3773 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 3774 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 3775 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 3776 | out_unlock: |
19e03c57 | 3777 | up_read(&nfsi->rwsem); |
01c3b861 TM |
3778 | out: |
3779 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3780 | return status; |
3781 | } | |
3782 | ||
3783 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3784 | { | |
3785 | struct nfs4_exception exception = { }; | |
3786 | int err; | |
3787 | ||
3788 | do { | |
3789 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3790 | _nfs4_proc_setlk(state, cmd, request), | |
3791 | &exception); | |
3792 | } while (exception.retry); | |
3793 | return err; | |
3794 | } | |
3795 | ||
3796 | static int | |
3797 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3798 | { | |
3799 | struct nfs_open_context *ctx; | |
3800 | struct nfs4_state *state; | |
3801 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3802 | int status; | |
3803 | ||
3804 | /* verify open state */ | |
cd3758e3 | 3805 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
3806 | state = ctx->state; |
3807 | ||
3808 | if (request->fl_start < 0 || request->fl_end < 0) | |
3809 | return -EINVAL; | |
3810 | ||
3811 | if (IS_GETLK(cmd)) | |
3812 | return nfs4_proc_getlk(state, F_GETLK, request); | |
3813 | ||
3814 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
3815 | return -EINVAL; | |
3816 | ||
3817 | if (request->fl_type == F_UNLCK) | |
3818 | return nfs4_proc_unlck(state, cmd, request); | |
3819 | ||
3820 | do { | |
3821 | status = nfs4_proc_setlk(state, cmd, request); | |
3822 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
3823 | break; | |
3824 | timeout = nfs4_set_lock_task_retry(timeout); | |
3825 | status = -ERESTARTSYS; | |
3826 | if (signalled()) | |
3827 | break; | |
3828 | } while(status < 0); | |
1da177e4 LT |
3829 | return status; |
3830 | } | |
3831 | ||
888e694c TM |
3832 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
3833 | { | |
3834 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3835 | struct nfs4_exception exception = { }; | |
3836 | int err; | |
3837 | ||
3838 | err = nfs4_set_lock_state(state, fl); | |
3839 | if (err != 0) | |
3840 | goto out; | |
3841 | do { | |
3842 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
3843 | if (err != -NFS4ERR_DELAY) | |
3844 | break; | |
3845 | err = nfs4_handle_exception(server, err, &exception); | |
3846 | } while (exception.retry); | |
3847 | out: | |
3848 | return err; | |
3849 | } | |
6b3b5496 | 3850 | |
aa1870af BF |
3851 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
3852 | ||
6b3b5496 BF |
3853 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
3854 | size_t buflen, int flags) | |
3855 | { | |
4b580ee3 BF |
3856 | struct inode *inode = dentry->d_inode; |
3857 | ||
3858 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3859 | return -EOPNOTSUPP; | |
3860 | ||
4b580ee3 | 3861 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
3862 | } |
3863 | ||
3864 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
3865 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
3866 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
3867 | * attributes in kernel-managed attribute namespaces. */ | |
3868 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
3869 | size_t buflen) | |
3870 | { | |
aa1870af BF |
3871 | struct inode *inode = dentry->d_inode; |
3872 | ||
3873 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
3874 | return -EOPNOTSUPP; | |
3875 | ||
3876 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
3877 | } |
3878 | ||
3879 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
3880 | { | |
aa1870af | 3881 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 3882 | |
096455a2 BF |
3883 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
3884 | return 0; | |
6b3b5496 BF |
3885 | if (buf && buflen < len) |
3886 | return -ERANGE; | |
3887 | if (buf) | |
aa1870af BF |
3888 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
3889 | return len; | |
6b3b5496 BF |
3890 | } |
3891 | ||
69aaaae1 TM |
3892 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
3893 | { | |
3894 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
3895 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
3896 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
3897 | return; | |
3898 | ||
3899 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
3900 | NFS_ATTR_FATTR_NLINK; | |
3901 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
3902 | fattr->nlink = 2; | |
3903 | } | |
3904 | ||
56659e99 | 3905 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 3906 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
3907 | { |
3908 | struct nfs_server *server = NFS_SERVER(dir); | |
3909 | u32 bitmask[2] = { | |
361e624f MN |
3910 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
3911 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
3912 | }; |
3913 | struct nfs4_fs_locations_arg args = { | |
3914 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 3915 | .name = name, |
683b57b4 TM |
3916 | .page = page, |
3917 | .bitmask = bitmask, | |
3918 | }; | |
22958463 BH |
3919 | struct nfs4_fs_locations_res res = { |
3920 | .fs_locations = fs_locations, | |
3921 | }; | |
683b57b4 TM |
3922 | struct rpc_message msg = { |
3923 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
3924 | .rpc_argp = &args, | |
22958463 | 3925 | .rpc_resp = &res, |
683b57b4 TM |
3926 | }; |
3927 | int status; | |
3928 | ||
3110ff80 | 3929 | dprintk("%s: start\n", __func__); |
c228fd3a | 3930 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 3931 | fs_locations->server = server; |
830b8e33 | 3932 | fs_locations->nlocations = 0; |
cccef3b9 | 3933 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 3934 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 3935 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
3936 | return status; |
3937 | } | |
3938 | ||
557134a3 AA |
3939 | #ifdef CONFIG_NFS_V4_1 |
3940 | /* Destroy the slot table */ | |
3941 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
3942 | { | |
3943 | if (session->fc_slot_table.slots == NULL) | |
3944 | return; | |
3945 | kfree(session->fc_slot_table.slots); | |
3946 | session->fc_slot_table.slots = NULL; | |
3947 | return; | |
3948 | } | |
3949 | ||
3950 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
3951 | { | |
3952 | struct nfs4_session *session; | |
3953 | struct nfs4_slot_table *tbl; | |
3954 | ||
3955 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
3956 | if (!session) | |
3957 | return NULL; | |
3958 | tbl = &session->fc_slot_table; | |
3959 | spin_lock_init(&tbl->slot_tbl_lock); | |
3960 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
3961 | session->clp = clp; | |
3962 | return session; | |
3963 | } | |
3964 | ||
3965 | void nfs4_destroy_session(struct nfs4_session *session) | |
3966 | { | |
3967 | nfs4_destroy_slot_table(session); | |
3968 | kfree(session); | |
3969 | } | |
3970 | ||
3971 | #endif /* CONFIG_NFS_V4_1 */ | |
3972 | ||
1da177e4 | 3973 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
7eff03ae | 3974 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 3975 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
3976 | .recover_open = nfs4_open_reclaim, |
3977 | .recover_lock = nfs4_lock_reclaim, | |
3978 | }; | |
3979 | ||
b79a4a1b | 3980 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { |
7eff03ae | 3981 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 3982 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
3983 | .recover_open = nfs4_open_expired, |
3984 | .recover_lock = nfs4_lock_expired, | |
3985 | }; | |
3986 | ||
92e1d5be | 3987 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
3988 | .permission = nfs_permission, |
3989 | .getattr = nfs_getattr, | |
3990 | .setattr = nfs_setattr, | |
3991 | .getxattr = nfs4_getxattr, | |
3992 | .setxattr = nfs4_setxattr, | |
3993 | .listxattr = nfs4_listxattr, | |
3994 | }; | |
3995 | ||
509de811 | 3996 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
3997 | .version = 4, /* protocol version */ |
3998 | .dentry_ops = &nfs4_dentry_operations, | |
3999 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 4000 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
4001 | .getroot = nfs4_proc_get_root, |
4002 | .getattr = nfs4_proc_getattr, | |
4003 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 4004 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
4005 | .lookup = nfs4_proc_lookup, |
4006 | .access = nfs4_proc_access, | |
4007 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
4008 | .create = nfs4_proc_create, |
4009 | .remove = nfs4_proc_remove, | |
4010 | .unlink_setup = nfs4_proc_unlink_setup, | |
4011 | .unlink_done = nfs4_proc_unlink_done, | |
4012 | .rename = nfs4_proc_rename, | |
4013 | .link = nfs4_proc_link, | |
4014 | .symlink = nfs4_proc_symlink, | |
4015 | .mkdir = nfs4_proc_mkdir, | |
4016 | .rmdir = nfs4_proc_remove, | |
4017 | .readdir = nfs4_proc_readdir, | |
4018 | .mknod = nfs4_proc_mknod, | |
4019 | .statfs = nfs4_proc_statfs, | |
4020 | .fsinfo = nfs4_proc_fsinfo, | |
4021 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 4022 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
4023 | .decode_dirent = nfs4_decode_dirent, |
4024 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 4025 | .read_done = nfs4_read_done, |
1da177e4 | 4026 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 4027 | .write_done = nfs4_write_done, |
1da177e4 | 4028 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 4029 | .commit_done = nfs4_commit_done, |
1da177e4 | 4030 | .lock = nfs4_proc_lock, |
e50a1c2e | 4031 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 4032 | .close_context = nfs4_close_context, |
1da177e4 LT |
4033 | }; |
4034 | ||
4035 | /* | |
4036 | * Local variables: | |
4037 | * c-basic-offset: 8 | |
4038 | * End: | |
4039 | */ |