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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> | |
1da177e4 LT |
39 | #include <linux/delay.h> |
40 | #include <linux/errno.h> | |
41 | #include <linux/string.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 LT |
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> | |
1da177e4 | 48 | #include <linux/namei.h> |
02a913a7 | 49 | #include <linux/mount.h> |
99fe60d0 | 50 | #include <linux/module.h> |
5a0ffe54 | 51 | #include <linux/sunrpc/bc_xprt.h> |
1da177e4 | 52 | |
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 | 54 | #include "delegation.h" |
101070ca | 55 | #include "internal.h" |
006ea73e | 56 | #include "iostat.h" |
fc931582 | 57 | #include "callback.h" |
1da177e4 LT |
58 | |
59 | #define NFSDBG_FACILITY NFSDBG_PROC | |
60 | ||
2066fe89 | 61 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
62 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
63 | ||
a78cb57a TM |
64 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
65 | ||
cdd4e68b | 66 | struct nfs4_opendata; |
864472e9 | 67 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
b257957e | 68 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
1da177e4 | 69 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 70 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
71 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
72 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
0ab64e0e TM |
73 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
74 | struct nfs_fattr *fattr, struct iattr *sattr, | |
75 | struct nfs4_state *state); | |
1da177e4 | 76 | |
1da177e4 | 77 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 78 | static int nfs4_map_errors(int err) |
1da177e4 | 79 | { |
52567b03 TM |
80 | if (err >= -1000) |
81 | return err; | |
82 | switch (err) { | |
83 | case -NFS4ERR_RESOURCE: | |
84 | return -EREMOTEIO; | |
85 | default: | |
1da177e4 | 86 | dprintk("%s could not handle NFSv4 error %d\n", |
3110ff80 | 87 | __func__, -err); |
52567b03 | 88 | break; |
1da177e4 | 89 | } |
52567b03 | 90 | return -EIO; |
1da177e4 LT |
91 | } |
92 | ||
93 | /* | |
94 | * This is our standard bitmap for GETATTR requests. | |
95 | */ | |
96 | const u32 nfs4_fattr_bitmap[2] = { | |
97 | FATTR4_WORD0_TYPE | |
98 | | FATTR4_WORD0_CHANGE | |
99 | | FATTR4_WORD0_SIZE | |
100 | | FATTR4_WORD0_FSID | |
101 | | FATTR4_WORD0_FILEID, | |
102 | FATTR4_WORD1_MODE | |
103 | | FATTR4_WORD1_NUMLINKS | |
104 | | FATTR4_WORD1_OWNER | |
105 | | FATTR4_WORD1_OWNER_GROUP | |
106 | | FATTR4_WORD1_RAWDEV | |
107 | | FATTR4_WORD1_SPACE_USED | |
108 | | FATTR4_WORD1_TIME_ACCESS | |
109 | | FATTR4_WORD1_TIME_METADATA | |
110 | | FATTR4_WORD1_TIME_MODIFY | |
111 | }; | |
112 | ||
113 | const u32 nfs4_statfs_bitmap[2] = { | |
114 | FATTR4_WORD0_FILES_AVAIL | |
115 | | FATTR4_WORD0_FILES_FREE | |
116 | | FATTR4_WORD0_FILES_TOTAL, | |
117 | FATTR4_WORD1_SPACE_AVAIL | |
118 | | FATTR4_WORD1_SPACE_FREE | |
119 | | FATTR4_WORD1_SPACE_TOTAL | |
120 | }; | |
121 | ||
4ce79717 | 122 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
123 | FATTR4_WORD0_MAXLINK |
124 | | FATTR4_WORD0_MAXNAME, | |
125 | 0 | |
126 | }; | |
127 | ||
128 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
129 | | FATTR4_WORD0_MAXREAD | |
130 | | FATTR4_WORD0_MAXWRITE | |
131 | | FATTR4_WORD0_LEASE_TIME, | |
132 | 0 | |
133 | }; | |
134 | ||
830b8e33 MN |
135 | const u32 nfs4_fs_locations_bitmap[2] = { |
136 | FATTR4_WORD0_TYPE | |
137 | | FATTR4_WORD0_CHANGE | |
138 | | FATTR4_WORD0_SIZE | |
139 | | FATTR4_WORD0_FSID | |
140 | | FATTR4_WORD0_FILEID | |
141 | | FATTR4_WORD0_FS_LOCATIONS, | |
142 | FATTR4_WORD1_MODE | |
143 | | FATTR4_WORD1_NUMLINKS | |
144 | | FATTR4_WORD1_OWNER | |
145 | | FATTR4_WORD1_OWNER_GROUP | |
146 | | FATTR4_WORD1_RAWDEV | |
147 | | FATTR4_WORD1_SPACE_USED | |
148 | | FATTR4_WORD1_TIME_ACCESS | |
149 | | FATTR4_WORD1_TIME_METADATA | |
150 | | FATTR4_WORD1_TIME_MODIFY | |
151 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
152 | }; | |
153 | ||
bc4785cd | 154 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
155 | struct nfs4_readdir_arg *readdir) |
156 | { | |
0dbb4c67 | 157 | __be32 *start, *p; |
1da177e4 LT |
158 | |
159 | BUG_ON(readdir->count < 80); | |
160 | if (cookie > 2) { | |
b7ef1956 | 161 | readdir->cookie = cookie; |
1da177e4 LT |
162 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
163 | return; | |
164 | } | |
165 | ||
166 | readdir->cookie = 0; | |
167 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
168 | if (cookie == 2) | |
169 | return; | |
170 | ||
171 | /* | |
172 | * NFSv4 servers do not return entries for '.' and '..' | |
173 | * Therefore, we fake these entries here. We let '.' | |
174 | * have cookie 0 and '..' have cookie 1. Note that | |
175 | * when talking to the server, we always send cookie 0 | |
176 | * instead of 1 or 2. | |
177 | */ | |
0dbb4c67 | 178 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
179 | |
180 | if (cookie == 0) { | |
181 | *p++ = xdr_one; /* next */ | |
182 | *p++ = xdr_zero; /* cookie, first word */ | |
183 | *p++ = xdr_one; /* cookie, second word */ | |
184 | *p++ = xdr_one; /* entry len */ | |
185 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
186 | p++; | |
187 | *p++ = xdr_one; /* bitmap length */ | |
188 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
189 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 190 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
191 | } |
192 | ||
193 | *p++ = xdr_one; /* next */ | |
194 | *p++ = xdr_zero; /* cookie, first word */ | |
195 | *p++ = xdr_two; /* cookie, second word */ | |
196 | *p++ = xdr_two; /* entry len */ | |
197 | memcpy(p, "..\0\0", 4); /* entry */ | |
198 | p++; | |
199 | *p++ = xdr_one; /* bitmap length */ | |
200 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
201 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 202 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
203 | |
204 | readdir->pgbase = (char *)p - (char *)start; | |
205 | readdir->count -= readdir->pgbase; | |
206 | kunmap_atomic(start, KM_USER0); | |
207 | } | |
208 | ||
65de872e TM |
209 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
210 | { | |
211 | int res; | |
212 | ||
213 | might_sleep(); | |
214 | ||
e005e804 | 215 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 216 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
217 | return res; |
218 | } | |
219 | ||
220 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
221 | { | |
222 | int res = 0; | |
223 | ||
224 | might_sleep(); | |
225 | ||
226 | if (*timeout <= 0) | |
227 | *timeout = NFS4_POLL_RETRY_MIN; | |
228 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
229 | *timeout = NFS4_POLL_RETRY_MAX; | |
230 | schedule_timeout_killable(*timeout); | |
231 | if (fatal_signal_pending(current)) | |
232 | res = -ERESTARTSYS; | |
233 | *timeout <<= 1; | |
234 | return res; | |
235 | } | |
236 | ||
237 | /* This is the error handling routine for processes that are allowed | |
238 | * to sleep. | |
239 | */ | |
240 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
241 | { | |
242 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 243 | struct nfs4_state *state = exception->state; |
65de872e TM |
244 | int ret = errorcode; |
245 | ||
246 | exception->retry = 0; | |
247 | switch(errorcode) { | |
248 | case 0: | |
249 | return 0; | |
9e33bed5 TM |
250 | case -NFS4ERR_ADMIN_REVOKED: |
251 | case -NFS4ERR_BAD_STATEID: | |
252 | case -NFS4ERR_OPENMODE: | |
253 | if (state == NULL) | |
254 | break; | |
255 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 256 | goto do_state_recovery; |
65de872e | 257 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
258 | if (state == NULL) |
259 | break; | |
260 | nfs4_state_mark_reclaim_reboot(clp, state); | |
261 | case -NFS4ERR_STALE_CLIENTID: | |
65de872e | 262 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 263 | goto do_state_recovery; |
03391693 | 264 | #if defined(CONFIG_NFS_V4_1) |
4745e315 AA |
265 | case -NFS4ERR_BADSESSION: |
266 | case -NFS4ERR_BADSLOT: | |
267 | case -NFS4ERR_BAD_HIGH_SLOT: | |
268 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
269 | case -NFS4ERR_DEADSESSION: | |
270 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
271 | case -NFS4ERR_SEQ_MISORDERED: | |
272 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
273 | errorcode); | |
0b9e2d41 | 274 | nfs4_schedule_state_recovery(clp); |
4745e315 | 275 | exception->retry = 1; |
b9179237 | 276 | break; |
03391693 | 277 | #endif /* defined(CONFIG_NFS_V4_1) */ |
65de872e | 278 | case -NFS4ERR_FILE_OPEN: |
44ed3556 N |
279 | if (exception->timeout > HZ) { |
280 | /* We have retried a decent amount, time to | |
281 | * fail | |
282 | */ | |
283 | ret = -EBUSY; | |
284 | break; | |
285 | } | |
65de872e TM |
286 | case -NFS4ERR_GRACE: |
287 | case -NFS4ERR_DELAY: | |
2c643488 | 288 | case -EKEYEXPIRED: |
65de872e TM |
289 | ret = nfs4_delay(server->client, &exception->timeout); |
290 | if (ret != 0) | |
291 | break; | |
292 | case -NFS4ERR_OLD_STATEID: | |
293 | exception->retry = 1; | |
294 | } | |
295 | /* We failed to handle the error */ | |
296 | return nfs4_map_errors(ret); | |
a2c0b9e2 TM |
297 | do_state_recovery: |
298 | nfs4_schedule_state_recovery(clp); | |
299 | ret = nfs4_wait_clnt_recover(clp); | |
300 | if (ret == 0) | |
301 | exception->retry = 1; | |
302 | return ret; | |
65de872e TM |
303 | } |
304 | ||
305 | ||
26e976a8 | 306 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 307 | { |
7539bbab | 308 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
309 | spin_lock(&clp->cl_lock); |
310 | if (time_before(clp->cl_last_renewal,timestamp)) | |
311 | clp->cl_last_renewal = timestamp; | |
312 | spin_unlock(&clp->cl_lock); | |
313 | } | |
314 | ||
cccef3b9 AA |
315 | #if defined(CONFIG_NFS_V4_1) |
316 | ||
e2c4ab3c AA |
317 | /* |
318 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
319 | * | |
320 | * freeing a slot is trivially done by clearing its respective bit | |
321 | * in the bitmap. | |
322 | * If the freed slotid equals highest_used_slotid we want to update it | |
323 | * so that the server would be able to size down the slot table if needed, | |
324 | * otherwise we know that the highest_used_slotid is still in use. | |
325 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
326 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
327 | * highest slotid in use. | |
328 | * If none found, highest_used_slotid is set to -1. | |
35dc1d74 TM |
329 | * |
330 | * Must be called while holding tbl->slot_tbl_lock | |
e2c4ab3c AA |
331 | */ |
332 | static void | |
333 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
334 | { | |
335 | int slotid = free_slotid; | |
336 | ||
e2c4ab3c AA |
337 | /* clear used bit in bitmap */ |
338 | __clear_bit(slotid, tbl->used_slots); | |
339 | ||
340 | /* update highest_used_slotid when it is freed */ | |
341 | if (slotid == tbl->highest_used_slotid) { | |
342 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
bcb56164 | 343 | if (slotid < tbl->max_slots) |
e2c4ab3c AA |
344 | tbl->highest_used_slotid = slotid; |
345 | else | |
346 | tbl->highest_used_slotid = -1; | |
347 | } | |
e2c4ab3c AA |
348 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
349 | free_slotid, tbl->highest_used_slotid); | |
350 | } | |
351 | ||
3bfb0fc5 AB |
352 | /* |
353 | * Signal state manager thread if session is drained | |
354 | */ | |
355 | static void nfs41_check_drain_session_complete(struct nfs4_session *ses) | |
356 | { | |
689cf5c1 AB |
357 | struct rpc_task *task; |
358 | ||
a2118c33 | 359 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
689cf5c1 AB |
360 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
361 | if (task) | |
362 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
3bfb0fc5 AB |
363 | return; |
364 | } | |
365 | ||
366 | if (ses->fc_slot_table.highest_used_slotid != -1) | |
367 | return; | |
368 | ||
369 | dprintk("%s COMPLETE: Session Drained\n", __func__); | |
370 | complete(&ses->complete); | |
371 | } | |
372 | ||
d185a334 | 373 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
13615871 AA |
374 | { |
375 | struct nfs4_slot_table *tbl; | |
376 | ||
d185a334 | 377 | tbl = &res->sr_session->fc_slot_table; |
13615871 | 378 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { |
13615871 AA |
379 | /* just wake up the next guy waiting since |
380 | * we may have not consumed a slot after all */ | |
691daf3b | 381 | dprintk("%s: No slot\n", __func__); |
35dc1d74 | 382 | return; |
13615871 | 383 | } |
ea028ac9 | 384 | |
35dc1d74 TM |
385 | spin_lock(&tbl->slot_tbl_lock); |
386 | nfs4_free_slot(tbl, res->sr_slotid); | |
d185a334 | 387 | nfs41_check_drain_session_complete(res->sr_session); |
35dc1d74 TM |
388 | spin_unlock(&tbl->slot_tbl_lock); |
389 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
13615871 AA |
390 | } |
391 | ||
d185a334 | 392 | static void nfs41_sequence_done(struct nfs4_sequence_res *res) |
b0df806c AA |
393 | { |
394 | unsigned long timestamp; | |
395 | struct nfs4_slot_table *tbl; | |
396 | struct nfs4_slot *slot; | |
397 | ||
398 | /* | |
399 | * sr_status remains 1 if an RPC level error occurred. The server | |
400 | * may or may not have processed the sequence operation.. | |
401 | * Proceed as if the server received and processed the sequence | |
402 | * operation. | |
403 | */ | |
404 | if (res->sr_status == 1) | |
405 | res->sr_status = NFS_OK; | |
406 | ||
407 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
408 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
409 | goto out; | |
410 | ||
691daf3b | 411 | /* Check the SEQUENCE operation status */ |
b0df806c | 412 | if (res->sr_status == 0) { |
d185a334 TM |
413 | struct nfs_client *clp = res->sr_session->clp; |
414 | tbl = &res->sr_session->fc_slot_table; | |
691daf3b | 415 | slot = tbl->slots + res->sr_slotid; |
b0df806c AA |
416 | /* Update the slot's sequence and clientid lease timer */ |
417 | ++slot->seq_nr; | |
418 | timestamp = res->sr_renewal_time; | |
419 | spin_lock(&clp->cl_lock); | |
420 | if (time_before(clp->cl_last_renewal, timestamp)) | |
421 | clp->cl_last_renewal = timestamp; | |
422 | spin_unlock(&clp->cl_lock); | |
0629e370 | 423 | /* Check sequence flags */ |
7135840f AB |
424 | if (atomic_read(&clp->cl_count) > 1) |
425 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
b0df806c AA |
426 | } |
427 | out: | |
428 | /* The session may be reset by one of the error handlers. */ | |
429 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
d185a334 | 430 | nfs41_sequence_free_slot(res); |
b0df806c AA |
431 | } |
432 | ||
df896455 TM |
433 | static void nfs4_sequence_done(const struct nfs_server *server, |
434 | struct nfs4_sequence_res *res, int rpc_status) | |
435 | { | |
436 | if (res->sr_session != NULL) | |
437 | nfs41_sequence_done(res); | |
438 | } | |
439 | ||
510b8175 BH |
440 | /* |
441 | * nfs4_find_slot - efficiently look for a free slot | |
442 | * | |
443 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
444 | * If found, we mark the slot as used, update the highest_used_slotid, | |
445 | * and respectively set up the sequence operation args. | |
446 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
447 | * |
448 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
449 | */ |
450 | static u8 | |
40ead580 | 451 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
510b8175 BH |
452 | { |
453 | int slotid; | |
454 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
455 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
456 | ||
510b8175 BH |
457 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
458 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
459 | tbl->max_slots); | |
460 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
461 | if (slotid >= tbl->max_slots) | |
462 | goto out; | |
463 | __set_bit(slotid, tbl->used_slots); | |
464 | if (slotid > tbl->highest_used_slotid) | |
465 | tbl->highest_used_slotid = slotid; | |
466 | ret_id = slotid; | |
467 | out: | |
468 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
469 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
470 | return ret_id; |
471 | } | |
472 | ||
ce5039c1 AA |
473 | static int nfs41_setup_sequence(struct nfs4_session *session, |
474 | struct nfs4_sequence_args *args, | |
475 | struct nfs4_sequence_res *res, | |
476 | int cache_reply, | |
477 | struct rpc_task *task) | |
478 | { | |
fbcd4abc AA |
479 | struct nfs4_slot *slot; |
480 | struct nfs4_slot_table *tbl; | |
481 | u8 slotid; | |
482 | ||
483 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
484 | /* slot already allocated? */ |
485 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
486 | return 0; | |
487 | ||
ce5039c1 | 488 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; |
fbcd4abc AA |
489 | tbl = &session->fc_slot_table; |
490 | ||
491 | spin_lock(&tbl->slot_tbl_lock); | |
a2118c33 | 492 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
5601a00d | 493 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
ea028ac9 AA |
494 | /* |
495 | * The state manager will wait until the slot table is empty. | |
496 | * Schedule the reset thread | |
497 | */ | |
05f0d236 | 498 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
b069d94a | 499 | spin_unlock(&tbl->slot_tbl_lock); |
bcb56164 | 500 | dprintk("%s Schedule Session Reset\n", __func__); |
05f0d236 | 501 | return -EAGAIN; |
b069d94a AA |
502 | } |
503 | ||
689cf5c1 AB |
504 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
505 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
506 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
507 | spin_unlock(&tbl->slot_tbl_lock); | |
508 | dprintk("%s enforce FIFO order\n", __func__); | |
509 | return -EAGAIN; | |
510 | } | |
511 | ||
40ead580 | 512 | slotid = nfs4_find_slot(tbl); |
fbcd4abc AA |
513 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
514 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
515 | spin_unlock(&tbl->slot_tbl_lock); | |
516 | dprintk("<-- %s: no free slots\n", __func__); | |
517 | return -EAGAIN; | |
518 | } | |
519 | spin_unlock(&tbl->slot_tbl_lock); | |
520 | ||
689cf5c1 | 521 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
fbcd4abc | 522 | slot = tbl->slots + slotid; |
99fe60d0 | 523 | args->sa_session = session; |
fbcd4abc AA |
524 | args->sa_slotid = slotid; |
525 | args->sa_cache_this = cache_reply; | |
526 | ||
527 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
528 | ||
99fe60d0 | 529 | res->sr_session = session; |
fbcd4abc AA |
530 | res->sr_slotid = slotid; |
531 | res->sr_renewal_time = jiffies; | |
2a6e26cd | 532 | res->sr_status_flags = 0; |
fbcd4abc AA |
533 | /* |
534 | * sr_status is only set in decode_sequence, and so will remain | |
535 | * set to 1 if an rpc level failure occurs. | |
536 | */ | |
537 | res->sr_status = 1; | |
ce5039c1 AA |
538 | return 0; |
539 | } | |
540 | ||
035168ab | 541 | int nfs4_setup_sequence(const struct nfs_server *server, |
ce5039c1 AA |
542 | struct nfs4_sequence_args *args, |
543 | struct nfs4_sequence_res *res, | |
544 | int cache_reply, | |
545 | struct rpc_task *task) | |
546 | { | |
035168ab | 547 | struct nfs4_session *session = nfs4_get_session(server); |
ce5039c1 AA |
548 | int ret = 0; |
549 | ||
035168ab TM |
550 | if (session == NULL) { |
551 | args->sa_session = NULL; | |
552 | res->sr_session = NULL; | |
553 | goto out; | |
554 | } | |
555 | ||
ce5039c1 | 556 | dprintk("--> %s clp %p session %p sr_slotid %d\n", |
035168ab | 557 | __func__, session->clp, session, res->sr_slotid); |
ce5039c1 | 558 | |
035168ab | 559 | ret = nfs41_setup_sequence(session, args, res, cache_reply, |
ce5039c1 | 560 | task); |
ce5039c1 AA |
561 | out: |
562 | dprintk("<-- %s status=%d\n", __func__, ret); | |
563 | return ret; | |
564 | } | |
565 | ||
566 | struct nfs41_call_sync_data { | |
035168ab | 567 | const struct nfs_server *seq_server; |
ce5039c1 AA |
568 | struct nfs4_sequence_args *seq_args; |
569 | struct nfs4_sequence_res *seq_res; | |
570 | int cache_reply; | |
571 | }; | |
572 | ||
573 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
574 | { | |
575 | struct nfs41_call_sync_data *data = calldata; | |
576 | ||
035168ab TM |
577 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
578 | ||
579 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, | |
ce5039c1 AA |
580 | data->seq_res, data->cache_reply, task)) |
581 | return; | |
582 | rpc_call_start(task); | |
583 | } | |
584 | ||
b257957e AB |
585 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
586 | { | |
587 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
588 | nfs41_call_sync_prepare(task, calldata); | |
589 | } | |
590 | ||
69ab40c4 AA |
591 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
592 | { | |
593 | struct nfs41_call_sync_data *data = calldata; | |
594 | ||
d185a334 | 595 | nfs41_sequence_done(data->seq_res); |
69ab40c4 AA |
596 | } |
597 | ||
ce5039c1 AA |
598 | struct rpc_call_ops nfs41_call_sync_ops = { |
599 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 600 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
601 | }; |
602 | ||
b257957e AB |
603 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
604 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, | |
605 | .rpc_call_done = nfs41_call_sync_done, | |
606 | }; | |
607 | ||
035168ab | 608 | static int nfs4_call_sync_sequence(struct nfs_server *server, |
ce5039c1 AA |
609 | struct rpc_message *msg, |
610 | struct nfs4_sequence_args *args, | |
611 | struct nfs4_sequence_res *res, | |
b257957e AB |
612 | int cache_reply, |
613 | int privileged) | |
ce5039c1 AA |
614 | { |
615 | int ret; | |
616 | struct rpc_task *task; | |
617 | struct nfs41_call_sync_data data = { | |
035168ab | 618 | .seq_server = server, |
ce5039c1 AA |
619 | .seq_args = args, |
620 | .seq_res = res, | |
621 | .cache_reply = cache_reply, | |
622 | }; | |
623 | struct rpc_task_setup task_setup = { | |
035168ab | 624 | .rpc_client = server->client, |
ce5039c1 AA |
625 | .rpc_message = msg, |
626 | .callback_ops = &nfs41_call_sync_ops, | |
627 | .callback_data = &data | |
628 | }; | |
629 | ||
630 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
b257957e AB |
631 | if (privileged) |
632 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; | |
ce5039c1 AA |
633 | task = rpc_run_task(&task_setup); |
634 | if (IS_ERR(task)) | |
635 | ret = PTR_ERR(task); | |
636 | else { | |
637 | ret = task->tk_status; | |
638 | rpc_put_task(task); | |
639 | } | |
640 | return ret; | |
641 | } | |
642 | ||
cccef3b9 AA |
643 | int _nfs4_call_sync_session(struct nfs_server *server, |
644 | struct rpc_message *msg, | |
645 | struct nfs4_sequence_args *args, | |
646 | struct nfs4_sequence_res *res, | |
647 | int cache_reply) | |
648 | { | |
035168ab | 649 | return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0); |
cccef3b9 AA |
650 | } |
651 | ||
df896455 TM |
652 | #else |
653 | static void nfs4_sequence_done(const struct nfs_server *server, | |
654 | struct nfs4_sequence_res *res, int rpc_status) | |
655 | { | |
656 | } | |
cccef3b9 AA |
657 | #endif /* CONFIG_NFS_V4_1 */ |
658 | ||
659 | int _nfs4_call_sync(struct nfs_server *server, | |
660 | struct rpc_message *msg, | |
661 | struct nfs4_sequence_args *args, | |
662 | struct nfs4_sequence_res *res, | |
663 | int cache_reply) | |
664 | { | |
f3752975 | 665 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
666 | return rpc_call_sync(server->client, msg, 0); |
667 | } | |
668 | ||
669 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
97dc1359 | 670 | (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \ |
cccef3b9 AA |
671 | &(res)->seq_res, (cache_reply)) |
672 | ||
38478b24 | 673 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 674 | { |
38478b24 | 675 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 676 | |
38478b24 | 677 | spin_lock(&dir->i_lock); |
40d24704 TM |
678 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
679 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 680 | nfs_force_lookup_revalidate(dir); |
40d24704 | 681 | nfsi->change_attr = cinfo->after; |
38478b24 | 682 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
683 | } |
684 | ||
e56e0b78 | 685 | struct nfs4_opendata { |
c6d00e63 | 686 | struct kref kref; |
e56e0b78 TM |
687 | struct nfs_openargs o_arg; |
688 | struct nfs_openres o_res; | |
cdd4e68b TM |
689 | struct nfs_open_confirmargs c_arg; |
690 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
691 | struct nfs_fattr f_attr; |
692 | struct nfs_fattr dir_attr; | |
ad389da7 | 693 | struct path path; |
e56e0b78 TM |
694 | struct dentry *dir; |
695 | struct nfs4_state_owner *owner; | |
aac00a8d | 696 | struct nfs4_state *state; |
e56e0b78 | 697 | struct iattr attrs; |
26e976a8 | 698 | unsigned long timestamp; |
3e309914 | 699 | unsigned int rpc_done : 1; |
24ac23ab TM |
700 | int rpc_status; |
701 | int cancelled; | |
e56e0b78 TM |
702 | }; |
703 | ||
2ced46c2 TM |
704 | |
705 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
706 | { | |
707 | p->o_res.f_attr = &p->f_attr; | |
708 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
709 | p->o_res.seqid = p->o_arg.seqid; |
710 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
711 | p->o_res.server = p->o_arg.server; |
712 | nfs_fattr_init(&p->f_attr); | |
713 | nfs_fattr_init(&p->dir_attr); | |
578e4585 | 714 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
2ced46c2 TM |
715 | } |
716 | ||
ad389da7 | 717 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 718 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
8535b2be TM |
719 | const struct iattr *attrs, |
720 | gfp_t gfp_mask) | |
e56e0b78 | 721 | { |
ad389da7 | 722 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
723 | struct inode *dir = parent->d_inode; |
724 | struct nfs_server *server = NFS_SERVER(dir); | |
725 | struct nfs4_opendata *p; | |
726 | ||
8535b2be | 727 | p = kzalloc(sizeof(*p), gfp_mask); |
e56e0b78 TM |
728 | if (p == NULL) |
729 | goto err; | |
8535b2be | 730 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
e56e0b78 TM |
731 | if (p->o_arg.seqid == NULL) |
732 | goto err_free; | |
f6948697 AV |
733 | path_get(path); |
734 | p->path = *path; | |
e56e0b78 TM |
735 | p->dir = parent; |
736 | p->owner = sp; | |
737 | atomic_inc(&sp->so_count); | |
738 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
739 | p->o_arg.open_flags = flags; |
740 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 741 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 742 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 743 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
744 | p->o_arg.server = server; |
745 | p->o_arg.bitmask = server->attr_bitmask; | |
746 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
e56e0b78 | 747 | if (flags & O_EXCL) { |
4882ef72 AB |
748 | if (nfs4_has_persistent_session(server->nfs_client)) { |
749 | /* GUARDED */ | |
750 | p->o_arg.u.attrs = &p->attrs; | |
751 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
752 | } else { /* EXCLUSIVE4_1 */ | |
753 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
754 | s[0] = jiffies; | |
755 | s[1] = current->pid; | |
756 | } | |
e56e0b78 TM |
757 | } else if (flags & O_CREAT) { |
758 | p->o_arg.u.attrs = &p->attrs; | |
759 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
760 | } | |
cdd4e68b TM |
761 | p->c_arg.fh = &p->o_res.fh; |
762 | p->c_arg.stateid = &p->o_res.stateid; | |
763 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 764 | nfs4_init_opendata_res(p); |
c6d00e63 | 765 | kref_init(&p->kref); |
e56e0b78 TM |
766 | return p; |
767 | err_free: | |
768 | kfree(p); | |
769 | err: | |
770 | dput(parent); | |
771 | return NULL; | |
772 | } | |
773 | ||
c6d00e63 | 774 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 775 | { |
c6d00e63 TM |
776 | struct nfs4_opendata *p = container_of(kref, |
777 | struct nfs4_opendata, kref); | |
778 | ||
779 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
780 | if (p->state != NULL) |
781 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
782 | nfs4_put_state_owner(p->owner); |
783 | dput(p->dir); | |
31f31db1 | 784 | path_put(&p->path); |
c6d00e63 TM |
785 | kfree(p); |
786 | } | |
787 | ||
788 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
789 | { | |
790 | if (p != NULL) | |
791 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
792 | } |
793 | ||
06f814a3 TM |
794 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
795 | { | |
06f814a3 TM |
796 | int ret; |
797 | ||
06f814a3 | 798 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
799 | return ret; |
800 | } | |
801 | ||
dc0b027d | 802 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
803 | { |
804 | int ret = 0; | |
dc0b027d TM |
805 | |
806 | if (open_mode & O_EXCL) | |
807 | goto out; | |
808 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 | 809 | case FMODE_READ: |
88069f77 TM |
810 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
811 | && state->n_rdonly != 0; | |
6ee41268 TM |
812 | break; |
813 | case FMODE_WRITE: | |
88069f77 TM |
814 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
815 | && state->n_wronly != 0; | |
6ee41268 TM |
816 | break; |
817 | case FMODE_READ|FMODE_WRITE: | |
88069f77 TM |
818 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
819 | && state->n_rdwr != 0; | |
6ee41268 | 820 | } |
dc0b027d | 821 | out: |
6ee41268 TM |
822 | return ret; |
823 | } | |
824 | ||
dc0b027d | 825 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 826 | { |
dc0b027d | 827 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 828 | return 0; |
15c831bf | 829 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 830 | return 0; |
b7391f44 | 831 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
832 | return 1; |
833 | } | |
834 | ||
dc0b027d | 835 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 836 | { |
dc0b027d | 837 | switch (fmode) { |
e7616923 TM |
838 | case FMODE_WRITE: |
839 | state->n_wronly++; | |
840 | break; | |
841 | case FMODE_READ: | |
842 | state->n_rdonly++; | |
843 | break; | |
844 | case FMODE_READ|FMODE_WRITE: | |
845 | state->n_rdwr++; | |
846 | } | |
dc0b027d | 847 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
848 | } |
849 | ||
dc0b027d | 850 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
851 | { |
852 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
853 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
854 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 855 | switch (fmode) { |
003707c7 TM |
856 | case FMODE_READ: |
857 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
858 | break; | |
859 | case FMODE_WRITE: | |
860 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
861 | break; | |
862 | case FMODE_READ|FMODE_WRITE: | |
863 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
864 | } | |
e7616923 TM |
865 | } |
866 | ||
dc0b027d | 867 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 868 | { |
8bda4e4c | 869 | write_seqlock(&state->seqlock); |
dc0b027d | 870 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 871 | write_sequnlock(&state->seqlock); |
003707c7 TM |
872 | } |
873 | ||
dc0b027d | 874 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 875 | { |
8bda4e4c TM |
876 | /* |
877 | * Protect the call to nfs4_state_set_mode_locked and | |
878 | * serialise the stateid update | |
879 | */ | |
880 | write_seqlock(&state->seqlock); | |
003707c7 TM |
881 | if (deleg_stateid != NULL) { |
882 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
883 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
884 | } | |
885 | if (open_stateid != NULL) | |
dc0b027d | 886 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
887 | write_sequnlock(&state->seqlock); |
888 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 889 | update_open_stateflags(state, fmode); |
ec073428 | 890 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
891 | } |
892 | ||
dc0b027d | 893 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
894 | { |
895 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
896 | struct nfs_delegation *deleg_cur; | |
897 | int ret = 0; | |
898 | ||
dc0b027d | 899 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
900 | |
901 | rcu_read_lock(); | |
902 | deleg_cur = rcu_dereference(nfsi->delegation); | |
903 | if (deleg_cur == NULL) | |
904 | goto no_delegation; | |
905 | ||
906 | spin_lock(&deleg_cur->lock); | |
907 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 908 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
909 | goto no_delegation_unlock; |
910 | ||
911 | if (delegation == NULL) | |
912 | delegation = &deleg_cur->stateid; | |
913 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
914 | goto no_delegation_unlock; | |
915 | ||
b7391f44 | 916 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 917 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
918 | ret = 1; |
919 | no_delegation_unlock: | |
920 | spin_unlock(&deleg_cur->lock); | |
921 | no_delegation: | |
922 | rcu_read_unlock(); | |
923 | ||
924 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 925 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
926 | ret = 1; |
927 | } | |
928 | ||
929 | return ret; | |
930 | } | |
931 | ||
932 | ||
dc0b027d | 933 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
934 | { |
935 | struct nfs_delegation *delegation; | |
936 | ||
937 | rcu_read_lock(); | |
938 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 939 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
940 | rcu_read_unlock(); |
941 | return; | |
942 | } | |
943 | rcu_read_unlock(); | |
944 | nfs_inode_return_delegation(inode); | |
945 | } | |
946 | ||
6ee41268 | 947 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
948 | { |
949 | struct nfs4_state *state = opendata->state; | |
950 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
951 | struct nfs_delegation *delegation; | |
dc0b027d TM |
952 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
953 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
954 | nfs4_stateid stateid; |
955 | int ret = -EAGAIN; | |
956 | ||
aac00a8d | 957 | for (;;) { |
dc0b027d | 958 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 959 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
960 | if (can_open_cached(state, fmode, open_mode)) { |
961 | update_open_stateflags(state, fmode); | |
6ee41268 | 962 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
963 | goto out_return_state; |
964 | } | |
965 | spin_unlock(&state->owner->so_lock); | |
966 | } | |
34310430 TM |
967 | rcu_read_lock(); |
968 | delegation = rcu_dereference(nfsi->delegation); | |
969 | if (delegation == NULL || | |
dc0b027d | 970 | !can_open_delegated(delegation, fmode)) { |
34310430 | 971 | rcu_read_unlock(); |
aac00a8d | 972 | break; |
34310430 | 973 | } |
aac00a8d TM |
974 | /* Save the delegation */ |
975 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
976 | rcu_read_unlock(); | |
af22f94a | 977 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
978 | if (ret != 0) |
979 | goto out; | |
980 | ret = -EAGAIN; | |
34310430 TM |
981 | |
982 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 983 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 984 | goto out_return_state; |
aac00a8d | 985 | } |
aac00a8d TM |
986 | out: |
987 | return ERR_PTR(ret); | |
988 | out_return_state: | |
989 | atomic_inc(&state->count); | |
990 | return state; | |
991 | } | |
992 | ||
24ac23ab TM |
993 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
994 | { | |
995 | struct inode *inode; | |
996 | struct nfs4_state *state = NULL; | |
003707c7 | 997 | struct nfs_delegation *delegation; |
1b370bc2 | 998 | int ret; |
24ac23ab | 999 | |
aac00a8d | 1000 | if (!data->rpc_done) { |
6ee41268 | 1001 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
1002 | goto out; |
1003 | } | |
1004 | ||
1b370bc2 | 1005 | ret = -EAGAIN; |
24ac23ab | 1006 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 1007 | goto err; |
24ac23ab | 1008 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 1009 | ret = PTR_ERR(inode); |
03f28e3a | 1010 | if (IS_ERR(inode)) |
1b370bc2 TM |
1011 | goto err; |
1012 | ret = -ENOMEM; | |
24ac23ab TM |
1013 | state = nfs4_get_open_state(inode, data->owner); |
1014 | if (state == NULL) | |
1b370bc2 | 1015 | goto err_put_inode; |
549d6ed5 | 1016 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
1017 | int delegation_flags = 0; |
1018 | ||
003707c7 TM |
1019 | rcu_read_lock(); |
1020 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1021 | if (delegation) | |
1022 | delegation_flags = delegation->flags; | |
1023 | rcu_read_unlock(); | |
15c831bf | 1024 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
1025 | nfs_inode_set_delegation(state->inode, |
1026 | data->owner->so_cred, | |
1027 | &data->o_res); | |
1028 | else | |
1029 | nfs_inode_reclaim_delegation(state->inode, | |
1030 | data->owner->so_cred, | |
1031 | &data->o_res); | |
1032 | } | |
34310430 TM |
1033 | |
1034 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 1035 | data->o_arg.fmode); |
24ac23ab | 1036 | iput(inode); |
aac00a8d | 1037 | out: |
24ac23ab | 1038 | return state; |
1b370bc2 TM |
1039 | err_put_inode: |
1040 | iput(inode); | |
1041 | err: | |
1042 | return ERR_PTR(ret); | |
24ac23ab TM |
1043 | } |
1044 | ||
864472e9 TM |
1045 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
1046 | { | |
1047 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1048 | struct nfs_open_context *ctx; | |
1049 | ||
1050 | spin_lock(&state->inode->i_lock); | |
1051 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1052 | if (ctx->state != state) | |
1053 | continue; | |
1054 | get_nfs_open_context(ctx); | |
1055 | spin_unlock(&state->inode->i_lock); | |
1056 | return ctx; | |
1057 | } | |
1058 | spin_unlock(&state->inode->i_lock); | |
1059 | return ERR_PTR(-ENOENT); | |
1060 | } | |
1061 | ||
6f220ed5 TM |
1062 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
1063 | { | |
1064 | struct nfs4_opendata *opendata; | |
1065 | ||
8535b2be | 1066 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS); |
6f220ed5 TM |
1067 | if (opendata == NULL) |
1068 | return ERR_PTR(-ENOMEM); | |
1069 | opendata->state = state; | |
1070 | atomic_inc(&state->count); | |
1071 | return opendata; | |
1072 | } | |
1073 | ||
dc0b027d | 1074 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 1075 | { |
2ced46c2 | 1076 | struct nfs4_state *newstate; |
864472e9 TM |
1077 | int ret; |
1078 | ||
dc0b027d TM |
1079 | opendata->o_arg.open_flags = 0; |
1080 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
1081 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
1082 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1083 | nfs4_init_opendata_res(opendata); | |
b257957e | 1084 | ret = _nfs4_recover_proc_open(opendata); |
864472e9 TM |
1085 | if (ret != 0) |
1086 | return ret; | |
2ced46c2 | 1087 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1088 | if (IS_ERR(newstate)) |
1089 | return PTR_ERR(newstate); | |
dc0b027d | 1090 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 1091 | *res = newstate; |
864472e9 TM |
1092 | return 0; |
1093 | } | |
1094 | ||
1095 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1096 | { | |
864472e9 | 1097 | struct nfs4_state *newstate; |
864472e9 TM |
1098 | int ret; |
1099 | ||
1100 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1101 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1102 | smp_rmb(); |
1103 | if (state->n_rdwr != 0) { | |
2ced46c2 | 1104 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1105 | if (ret != 0) |
1106 | return ret; | |
2ced46c2 TM |
1107 | if (newstate != state) |
1108 | return -ESTALE; | |
864472e9 TM |
1109 | } |
1110 | if (state->n_wronly != 0) { | |
2ced46c2 | 1111 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1112 | if (ret != 0) |
1113 | return ret; | |
2ced46c2 TM |
1114 | if (newstate != state) |
1115 | return -ESTALE; | |
864472e9 TM |
1116 | } |
1117 | if (state->n_rdonly != 0) { | |
2ced46c2 | 1118 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1119 | if (ret != 0) |
1120 | return ret; | |
2ced46c2 TM |
1121 | if (newstate != state) |
1122 | return -ESTALE; | |
864472e9 | 1123 | } |
1ac7e2fd TM |
1124 | /* |
1125 | * We may have performed cached opens for all three recoveries. | |
1126 | * Check if we need to update the current stateid. | |
1127 | */ | |
1128 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1129 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1130 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1131 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1132 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1133 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1134 | } |
864472e9 TM |
1135 | return 0; |
1136 | } | |
1137 | ||
1da177e4 LT |
1138 | /* |
1139 | * OPEN_RECLAIM: | |
1140 | * reclaim state on the server after a reboot. | |
1da177e4 | 1141 | */ |
539cd03a | 1142 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1143 | { |
1ac7e2fd | 1144 | struct nfs_delegation *delegation; |
864472e9 | 1145 | struct nfs4_opendata *opendata; |
dc0b027d | 1146 | fmode_t delegation_type = 0; |
1da177e4 LT |
1147 | int status; |
1148 | ||
6f220ed5 TM |
1149 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1150 | if (IS_ERR(opendata)) | |
1151 | return PTR_ERR(opendata); | |
864472e9 TM |
1152 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1153 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1154 | rcu_read_lock(); |
1155 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1156 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1157 | delegation_type = delegation->type; |
1ac7e2fd | 1158 | rcu_read_unlock(); |
864472e9 TM |
1159 | opendata->o_arg.u.delegation_type = delegation_type; |
1160 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1161 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1162 | return status; |
1163 | } | |
1164 | ||
539cd03a | 1165 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1166 | { |
1167 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1168 | struct nfs4_exception exception = { }; | |
1169 | int err; | |
1170 | do { | |
539cd03a | 1171 | err = _nfs4_do_open_reclaim(ctx, state); |
2c643488 | 1172 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
1173 | break; |
1174 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1175 | } while (exception.retry); |
1176 | return err; | |
1177 | } | |
1178 | ||
864472e9 TM |
1179 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1180 | { | |
1181 | struct nfs_open_context *ctx; | |
1182 | int ret; | |
1183 | ||
1184 | ctx = nfs4_state_find_open_context(state); | |
1185 | if (IS_ERR(ctx)) | |
1186 | return PTR_ERR(ctx); | |
539cd03a | 1187 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1188 | put_nfs_open_context(ctx); |
1189 | return ret; | |
1190 | } | |
1191 | ||
13437e12 | 1192 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1193 | { |
e56e0b78 | 1194 | struct nfs4_opendata *opendata; |
864472e9 | 1195 | int ret; |
1da177e4 | 1196 | |
6f220ed5 TM |
1197 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1198 | if (IS_ERR(opendata)) | |
1199 | return PTR_ERR(opendata); | |
e56e0b78 | 1200 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1201 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1202 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1203 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1204 | nfs4_opendata_put(opendata); |
864472e9 | 1205 | return ret; |
1da177e4 LT |
1206 | } |
1207 | ||
13437e12 | 1208 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1209 | { |
1210 | struct nfs4_exception exception = { }; | |
539cd03a | 1211 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1212 | int err; |
1213 | do { | |
13437e12 | 1214 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1215 | switch (err) { |
1216 | case 0: | |
965b5d67 TM |
1217 | case -ENOENT: |
1218 | case -ESTALE: | |
1219 | goto out; | |
bcfa49f6 RL |
1220 | case -NFS4ERR_BADSESSION: |
1221 | case -NFS4ERR_BADSLOT: | |
1222 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1223 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1224 | case -NFS4ERR_DEADSESSION: | |
1225 | nfs4_schedule_state_recovery( | |
1226 | server->nfs_client); | |
1227 | goto out; | |
1da177e4 LT |
1228 | case -NFS4ERR_STALE_CLIENTID: |
1229 | case -NFS4ERR_STALE_STATEID: | |
1230 | case -NFS4ERR_EXPIRED: | |
1231 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1232 | nfs4_schedule_state_recovery(server->nfs_client); |
965b5d67 TM |
1233 | goto out; |
1234 | case -ERESTARTSYS: | |
1235 | /* | |
1236 | * The show must go on: exit, but mark the | |
1237 | * stateid as needing recovery. | |
1238 | */ | |
1239 | case -NFS4ERR_ADMIN_REVOKED: | |
1240 | case -NFS4ERR_BAD_STATEID: | |
1241 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
1242 | case -ENOMEM: | |
1243 | err = 0; | |
1244 | goto out; | |
1da177e4 LT |
1245 | } |
1246 | err = nfs4_handle_exception(server, err, &exception); | |
1247 | } while (exception.retry); | |
965b5d67 | 1248 | out: |
1da177e4 LT |
1249 | return err; |
1250 | } | |
1251 | ||
cdd4e68b TM |
1252 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1253 | { | |
1254 | struct nfs4_opendata *data = calldata; | |
1255 | ||
1256 | data->rpc_status = task->tk_status; | |
1257 | if (RPC_ASSASSINATED(task)) | |
1258 | return; | |
26e976a8 | 1259 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1260 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1261 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1262 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1263 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1264 | data->rpc_done = 1; |
26e976a8 | 1265 | } |
cdd4e68b TM |
1266 | } |
1267 | ||
1268 | static void nfs4_open_confirm_release(void *calldata) | |
1269 | { | |
1270 | struct nfs4_opendata *data = calldata; | |
1271 | struct nfs4_state *state = NULL; | |
1272 | ||
1273 | /* If this request hasn't been cancelled, do nothing */ | |
1274 | if (data->cancelled == 0) | |
1275 | goto out_free; | |
1276 | /* In case of error, no cleanup! */ | |
3e309914 | 1277 | if (!data->rpc_done) |
cdd4e68b | 1278 | goto out_free; |
cdd4e68b | 1279 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1280 | if (!IS_ERR(state)) |
dc0b027d | 1281 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1282 | out_free: |
c6d00e63 | 1283 | nfs4_opendata_put(data); |
cdd4e68b TM |
1284 | } |
1285 | ||
1286 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1287 | .rpc_call_done = nfs4_open_confirm_done, |
1288 | .rpc_release = nfs4_open_confirm_release, | |
1289 | }; | |
1290 | ||
1291 | /* | |
1292 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1293 | */ | |
1294 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1295 | { | |
1296 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1297 | struct rpc_task *task; | |
5138fde0 TM |
1298 | struct rpc_message msg = { |
1299 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1300 | .rpc_argp = &data->c_arg, | |
1301 | .rpc_resp = &data->c_res, | |
1302 | .rpc_cred = data->owner->so_cred, | |
1303 | }; | |
c970aa85 TM |
1304 | struct rpc_task_setup task_setup_data = { |
1305 | .rpc_client = server->client, | |
5138fde0 | 1306 | .rpc_message = &msg, |
c970aa85 TM |
1307 | .callback_ops = &nfs4_open_confirm_ops, |
1308 | .callback_data = data, | |
101070ca | 1309 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1310 | .flags = RPC_TASK_ASYNC, |
1311 | }; | |
1da177e4 LT |
1312 | int status; |
1313 | ||
c6d00e63 | 1314 | kref_get(&data->kref); |
3e309914 TM |
1315 | data->rpc_done = 0; |
1316 | data->rpc_status = 0; | |
5138fde0 | 1317 | data->timestamp = jiffies; |
c970aa85 | 1318 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1319 | if (IS_ERR(task)) |
cdd4e68b | 1320 | return PTR_ERR(task); |
cdd4e68b TM |
1321 | status = nfs4_wait_for_completion_rpc_task(task); |
1322 | if (status != 0) { | |
1323 | data->cancelled = 1; | |
1324 | smp_wmb(); | |
1325 | } else | |
1326 | status = data->rpc_status; | |
e6b3c4db | 1327 | rpc_put_task(task); |
1da177e4 LT |
1328 | return status; |
1329 | } | |
1330 | ||
24ac23ab | 1331 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1332 | { |
24ac23ab TM |
1333 | struct nfs4_opendata *data = calldata; |
1334 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1335 | |
24ac23ab TM |
1336 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1337 | return; | |
aac00a8d TM |
1338 | /* |
1339 | * Check if we still need to send an OPEN call, or if we can use | |
1340 | * a delegation instead. | |
1341 | */ | |
1342 | if (data->state != NULL) { | |
1343 | struct nfs_delegation *delegation; | |
1344 | ||
dc0b027d | 1345 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1346 | goto out_no_action; |
aac00a8d TM |
1347 | rcu_read_lock(); |
1348 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1349 | if (delegation != NULL && | |
15c831bf | 1350 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1351 | rcu_read_unlock(); |
6ee41268 | 1352 | goto out_no_action; |
aac00a8d TM |
1353 | } |
1354 | rcu_read_unlock(); | |
1355 | } | |
24ac23ab | 1356 | /* Update sequence id. */ |
9f958ab8 | 1357 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 1358 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 1359 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1360 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1361 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1362 | } | |
26e976a8 | 1363 | data->timestamp = jiffies; |
035168ab | 1364 | if (nfs4_setup_sequence(data->o_arg.server, |
d898528c AA |
1365 | &data->o_arg.seq_args, |
1366 | &data->o_res.seq_res, 1, task)) | |
1367 | return; | |
5138fde0 | 1368 | rpc_call_start(task); |
6ee41268 TM |
1369 | return; |
1370 | out_no_action: | |
1371 | task->tk_action = NULL; | |
1372 | ||
24ac23ab | 1373 | } |
1da177e4 | 1374 | |
b257957e AB |
1375 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
1376 | { | |
1377 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
1378 | nfs4_open_prepare(task, calldata); | |
1379 | } | |
1380 | ||
24ac23ab TM |
1381 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1382 | { | |
1383 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1384 | |
24ac23ab | 1385 | data->rpc_status = task->tk_status; |
d898528c | 1386 | |
d61e612a TM |
1387 | nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res, |
1388 | task->tk_status); | |
d898528c | 1389 | |
24ac23ab TM |
1390 | if (RPC_ASSASSINATED(task)) |
1391 | return; | |
1392 | if (task->tk_status == 0) { | |
1393 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1394 | case S_IFREG: |
1395 | break; | |
1396 | case S_IFLNK: | |
24ac23ab | 1397 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1398 | break; |
1399 | case S_IFDIR: | |
24ac23ab | 1400 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1401 | break; |
1402 | default: | |
24ac23ab | 1403 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1404 | } |
26e976a8 | 1405 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1406 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1407 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1408 | } |
3e309914 | 1409 | data->rpc_done = 1; |
24ac23ab | 1410 | } |
6f926b5b | 1411 | |
24ac23ab TM |
1412 | static void nfs4_open_release(void *calldata) |
1413 | { | |
1414 | struct nfs4_opendata *data = calldata; | |
1415 | struct nfs4_state *state = NULL; | |
1416 | ||
1417 | /* If this request hasn't been cancelled, do nothing */ | |
1418 | if (data->cancelled == 0) | |
1419 | goto out_free; | |
1420 | /* In case of error, no cleanup! */ | |
3e309914 | 1421 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1422 | goto out_free; |
1423 | /* In case we need an open_confirm, no cleanup! */ | |
1424 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1425 | goto out_free; | |
24ac23ab | 1426 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1427 | if (!IS_ERR(state)) |
dc0b027d | 1428 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1429 | out_free: |
c6d00e63 | 1430 | nfs4_opendata_put(data); |
24ac23ab TM |
1431 | } |
1432 | ||
1433 | static const struct rpc_call_ops nfs4_open_ops = { | |
1434 | .rpc_call_prepare = nfs4_open_prepare, | |
1435 | .rpc_call_done = nfs4_open_done, | |
1436 | .rpc_release = nfs4_open_release, | |
1437 | }; | |
1438 | ||
b257957e AB |
1439 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
1440 | .rpc_call_prepare = nfs4_recover_open_prepare, | |
1441 | .rpc_call_done = nfs4_open_done, | |
1442 | .rpc_release = nfs4_open_release, | |
1443 | }; | |
1444 | ||
1445 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
24ac23ab TM |
1446 | { |
1447 | struct inode *dir = data->dir->d_inode; | |
1448 | struct nfs_server *server = NFS_SERVER(dir); | |
1449 | struct nfs_openargs *o_arg = &data->o_arg; | |
1450 | struct nfs_openres *o_res = &data->o_res; | |
1451 | struct rpc_task *task; | |
5138fde0 TM |
1452 | struct rpc_message msg = { |
1453 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1454 | .rpc_argp = o_arg, | |
1455 | .rpc_resp = o_res, | |
1456 | .rpc_cred = data->owner->so_cred, | |
1457 | }; | |
c970aa85 TM |
1458 | struct rpc_task_setup task_setup_data = { |
1459 | .rpc_client = server->client, | |
5138fde0 | 1460 | .rpc_message = &msg, |
c970aa85 TM |
1461 | .callback_ops = &nfs4_open_ops, |
1462 | .callback_data = data, | |
101070ca | 1463 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1464 | .flags = RPC_TASK_ASYNC, |
1465 | }; | |
24ac23ab TM |
1466 | int status; |
1467 | ||
c6d00e63 | 1468 | kref_get(&data->kref); |
3e309914 TM |
1469 | data->rpc_done = 0; |
1470 | data->rpc_status = 0; | |
2ced46c2 | 1471 | data->cancelled = 0; |
b257957e AB |
1472 | if (isrecover) |
1473 | task_setup_data.callback_ops = &nfs4_recover_open_ops; | |
c970aa85 | 1474 | task = rpc_run_task(&task_setup_data); |
b257957e AB |
1475 | if (IS_ERR(task)) |
1476 | return PTR_ERR(task); | |
1477 | status = nfs4_wait_for_completion_rpc_task(task); | |
1478 | if (status != 0) { | |
1479 | data->cancelled = 1; | |
1480 | smp_wmb(); | |
1481 | } else | |
1482 | status = data->rpc_status; | |
1483 | rpc_put_task(task); | |
1484 | ||
1485 | return status; | |
1486 | } | |
1487 | ||
1488 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1489 | { | |
1490 | struct inode *dir = data->dir->d_inode; | |
1491 | struct nfs_openres *o_res = &data->o_res; | |
1492 | int status; | |
1493 | ||
1494 | status = nfs4_run_open_task(data, 1); | |
1495 | if (status != 0 || !data->rpc_done) | |
1496 | return status; | |
1497 | ||
1498 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1499 | ||
1500 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1501 | status = _nfs4_proc_open_confirm(data); | |
1502 | if (status != 0) | |
1503 | return status; | |
1504 | } | |
1505 | ||
1506 | return status; | |
1507 | } | |
1508 | ||
1509 | /* | |
1510 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1511 | */ | |
1512 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1513 | { | |
1514 | struct inode *dir = data->dir->d_inode; | |
1515 | struct nfs_server *server = NFS_SERVER(dir); | |
1516 | struct nfs_openargs *o_arg = &data->o_arg; | |
1517 | struct nfs_openres *o_res = &data->o_res; | |
1518 | int status; | |
1519 | ||
1520 | status = nfs4_run_open_task(data, 0); | |
3e309914 | 1521 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1522 | return status; |
1523 | ||
56ae19f3 TM |
1524 | if (o_arg->open_flags & O_CREAT) { |
1525 | update_changeattr(dir, &o_res->cinfo); | |
1526 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1527 | } else | |
1528 | nfs_refresh_inode(dir, o_res->dir_attr); | |
0df5dd4a TM |
1529 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
1530 | server->caps &= ~NFS_CAP_POSIX_LOCK; | |
1da177e4 | 1531 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1532 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1533 | if (status != 0) |
24ac23ab | 1534 | return status; |
1da177e4 LT |
1535 | } |
1536 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1537 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1538 | return 0; |
1da177e4 LT |
1539 | } |
1540 | ||
10afec90 | 1541 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1542 | { |
7539bbab | 1543 | struct nfs_client *clp = server->nfs_client; |
a78cb57a | 1544 | unsigned int loop; |
6b30954e | 1545 | int ret; |
58d9714a | 1546 | |
a78cb57a | 1547 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
65de872e | 1548 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e | 1549 | if (ret != 0) |
a78cb57a | 1550 | break; |
e598d843 TM |
1551 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1552 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1553 | break; |
58d9714a | 1554 | nfs4_schedule_state_recovery(clp); |
a78cb57a | 1555 | ret = -EIO; |
6b30954e | 1556 | } |
a78cb57a | 1557 | return ret; |
58d9714a TM |
1558 | } |
1559 | ||
1da177e4 LT |
1560 | /* |
1561 | * OPEN_EXPIRED: | |
1562 | * reclaim state on the server after a network partition. | |
1563 | * Assumes caller holds the appropriate lock | |
1564 | */ | |
539cd03a | 1565 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1566 | { |
e56e0b78 | 1567 | struct nfs4_opendata *opendata; |
864472e9 | 1568 | int ret; |
1da177e4 | 1569 | |
6f220ed5 TM |
1570 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1571 | if (IS_ERR(opendata)) | |
1572 | return PTR_ERR(opendata); | |
864472e9 | 1573 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1574 | if (ret == -ESTALE) |
539cd03a | 1575 | d_drop(ctx->path.dentry); |
c6d00e63 | 1576 | nfs4_opendata_put(opendata); |
864472e9 | 1577 | return ret; |
1da177e4 LT |
1578 | } |
1579 | ||
a9ed2e25 | 1580 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1581 | { |
539cd03a | 1582 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1583 | struct nfs4_exception exception = { }; |
1584 | int err; | |
1585 | ||
1586 | do { | |
539cd03a | 1587 | err = _nfs4_open_expired(ctx, state); |
a9ed2e25 TM |
1588 | switch (err) { |
1589 | default: | |
1590 | goto out; | |
1591 | case -NFS4ERR_GRACE: | |
1592 | case -NFS4ERR_DELAY: | |
2c643488 | 1593 | case -EKEYEXPIRED: |
a9ed2e25 TM |
1594 | nfs4_handle_exception(server, err, &exception); |
1595 | err = 0; | |
1596 | } | |
202b50dc | 1597 | } while (exception.retry); |
a9ed2e25 | 1598 | out: |
202b50dc TM |
1599 | return err; |
1600 | } | |
1601 | ||
1da177e4 LT |
1602 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1603 | { | |
1da177e4 | 1604 | struct nfs_open_context *ctx; |
864472e9 | 1605 | int ret; |
1da177e4 | 1606 | |
864472e9 TM |
1607 | ctx = nfs4_state_find_open_context(state); |
1608 | if (IS_ERR(ctx)) | |
1609 | return PTR_ERR(ctx); | |
539cd03a | 1610 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1611 | put_nfs_open_context(ctx); |
1612 | return ret; | |
1da177e4 LT |
1613 | } |
1614 | ||
aa53ed54 JL |
1615 | /* |
1616 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1617 | * fields corresponding to attributes that were used to store the verifier. | |
1618 | * Make sure we clobber those fields in the later setattr call | |
1619 | */ | |
1620 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1621 | { | |
1622 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1623 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1624 | sattr->ia_valid |= ATTR_ATIME; | |
1625 | ||
1626 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1627 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1628 | sattr->ia_valid |= ATTR_MTIME; | |
1629 | } | |
1630 | ||
1da177e4 | 1631 | /* |
24ac23ab | 1632 | * Returns a referenced nfs4_state |
1da177e4 | 1633 | */ |
dc0b027d | 1634 | 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 |
1635 | { |
1636 | struct nfs4_state_owner *sp; | |
1637 | struct nfs4_state *state = NULL; | |
1638 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1639 | struct nfs4_opendata *opendata; |
aac00a8d | 1640 | int status; |
1da177e4 LT |
1641 | |
1642 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1643 | status = -ENOMEM; |
1644 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1645 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1646 | goto out_err; | |
1647 | } | |
58d9714a TM |
1648 | status = nfs4_recover_expired_lease(server); |
1649 | if (status != 0) | |
b4454fe1 | 1650 | goto err_put_state_owner; |
aac00a8d | 1651 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1652 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1653 | status = -ENOMEM; |
8535b2be | 1654 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL); |
e56e0b78 | 1655 | if (opendata == NULL) |
95d35cb4 | 1656 | goto err_put_state_owner; |
1da177e4 | 1657 | |
aac00a8d TM |
1658 | if (path->dentry->d_inode != NULL) |
1659 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1660 | ||
24ac23ab | 1661 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1662 | if (status != 0) |
c6d00e63 | 1663 | goto err_opendata_put; |
1da177e4 | 1664 | |
24ac23ab | 1665 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1666 | status = PTR_ERR(state); |
1667 | if (IS_ERR(state)) | |
c6d00e63 | 1668 | goto err_opendata_put; |
0df5dd4a | 1669 | if (server->caps & NFS_CAP_POSIX_LOCK) |
8e469ebd | 1670 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
0ab64e0e TM |
1671 | |
1672 | if (opendata->o_arg.open_flags & O_EXCL) { | |
1673 | nfs4_exclusive_attrset(opendata, sattr); | |
1674 | ||
1675 | nfs_fattr_init(opendata->o_res.f_attr); | |
1676 | status = nfs4_do_setattr(state->inode, cred, | |
1677 | opendata->o_res.f_attr, sattr, | |
1678 | state); | |
1679 | if (status == 0) | |
1680 | nfs_setattr_update_inode(state->inode, sattr); | |
1681 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); | |
1682 | } | |
c6d00e63 | 1683 | nfs4_opendata_put(opendata); |
1da177e4 | 1684 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1685 | *res = state; |
1686 | return 0; | |
c6d00e63 TM |
1687 | err_opendata_put: |
1688 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1689 | err_put_state_owner: |
1690 | nfs4_put_state_owner(sp); | |
1da177e4 | 1691 | out_err: |
1da177e4 LT |
1692 | *res = NULL; |
1693 | return status; | |
1694 | } | |
1695 | ||
1696 | ||
dc0b027d | 1697 | 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 |
1698 | { |
1699 | struct nfs4_exception exception = { }; | |
1700 | struct nfs4_state *res; | |
1701 | int status; | |
1702 | ||
1703 | do { | |
dc0b027d | 1704 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1705 | if (status == 0) |
1706 | break; | |
1707 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1708 | * book-keeping w.r.t. state-changing operations | |
1709 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1710 | * It is actually a sign of a bug on the client or on the server. | |
1711 | * | |
1712 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1713 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1714 | * have unhashed the old state_owner for us, and that we can |
1715 | * therefore safely retry using a new one. We should still warn | |
1716 | * the user though... | |
1717 | */ | |
1718 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1719 | printk(KERN_WARNING "NFS: v4 server %s " |
1720 | " returned a bad sequence-id error!\n", | |
1721 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1722 | exception.retry = 1; |
1723 | continue; | |
1724 | } | |
550f5747 TM |
1725 | /* |
1726 | * BAD_STATEID on OPEN means that the server cancelled our | |
1727 | * state before it received the OPEN_CONFIRM. | |
1728 | * Recover by retrying the request as per the discussion | |
1729 | * on Page 181 of RFC3530. | |
1730 | */ | |
1731 | if (status == -NFS4ERR_BAD_STATEID) { | |
1732 | exception.retry = 1; | |
1733 | continue; | |
1734 | } | |
aac00a8d TM |
1735 | if (status == -EAGAIN) { |
1736 | /* We must have found a delegation */ | |
1737 | exception.retry = 1; | |
1738 | continue; | |
1739 | } | |
1da177e4 LT |
1740 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1741 | status, &exception)); | |
1742 | } while (exception.retry); | |
1743 | return res; | |
1744 | } | |
1745 | ||
659bfcd6 TM |
1746 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1747 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1748 | struct nfs4_state *state) | |
1da177e4 | 1749 | { |
3e4f6290 | 1750 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1751 | struct nfs_setattrargs arg = { |
3e4f6290 | 1752 | .fh = NFS_FH(inode), |
1da177e4 LT |
1753 | .iap = sattr, |
1754 | .server = server, | |
1755 | .bitmask = server->attr_bitmask, | |
1756 | }; | |
1757 | struct nfs_setattrres res = { | |
1758 | .fattr = fattr, | |
1759 | .server = server, | |
1760 | }; | |
1761 | struct rpc_message msg = { | |
659bfcd6 TM |
1762 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1763 | .rpc_argp = &arg, | |
1764 | .rpc_resp = &res, | |
1765 | .rpc_cred = cred, | |
1da177e4 | 1766 | }; |
26e976a8 | 1767 | unsigned long timestamp = jiffies; |
65e4308d | 1768 | int status; |
1da177e4 | 1769 | |
0e574af1 | 1770 | nfs_fattr_init(fattr); |
1da177e4 | 1771 | |
3e4f6290 TM |
1772 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1773 | /* Use that stateid */ | |
1774 | } else if (state != NULL) { | |
08e9eac4 TM |
1775 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1776 | } else | |
1da177e4 LT |
1777 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1778 | ||
cccef3b9 | 1779 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1780 | if (status == 0 && state != NULL) |
1781 | renew_lease(server, timestamp); | |
65e4308d | 1782 | return status; |
1da177e4 LT |
1783 | } |
1784 | ||
659bfcd6 TM |
1785 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1786 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1787 | struct nfs4_state *state) | |
1da177e4 | 1788 | { |
3e4f6290 | 1789 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1790 | struct nfs4_exception exception = { }; |
1791 | int err; | |
1792 | do { | |
1793 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1794 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1795 | &exception); |
1796 | } while (exception.retry); | |
1797 | return err; | |
1798 | } | |
1799 | ||
1800 | struct nfs4_closedata { | |
4a35bd41 | 1801 | struct path path; |
1da177e4 LT |
1802 | struct inode *inode; |
1803 | struct nfs4_state *state; | |
1804 | struct nfs_closeargs arg; | |
1805 | struct nfs_closeres res; | |
516a6af6 | 1806 | struct nfs_fattr fattr; |
26e976a8 | 1807 | unsigned long timestamp; |
1da177e4 LT |
1808 | }; |
1809 | ||
963d8fe5 | 1810 | static void nfs4_free_closedata(void *data) |
9512135d | 1811 | { |
963d8fe5 TM |
1812 | struct nfs4_closedata *calldata = data; |
1813 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1814 | |
1815 | nfs4_put_open_state(calldata->state); | |
1816 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1817 | nfs4_put_state_owner(sp); |
31f31db1 | 1818 | path_put(&calldata->path); |
9512135d TM |
1819 | kfree(calldata); |
1820 | } | |
1821 | ||
88069f77 TM |
1822 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
1823 | fmode_t fmode) | |
1824 | { | |
1825 | spin_lock(&state->owner->so_lock); | |
1826 | if (!(fmode & FMODE_READ)) | |
1827 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1828 | if (!(fmode & FMODE_WRITE)) | |
1829 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1830 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1831 | spin_unlock(&state->owner->so_lock); | |
1832 | } | |
1833 | ||
963d8fe5 | 1834 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1835 | { |
963d8fe5 | 1836 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1837 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1838 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1839 | ||
19ddab06 | 1840 | nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); |
4ce70ada TM |
1841 | if (RPC_ASSASSINATED(task)) |
1842 | return; | |
1da177e4 LT |
1843 | /* hmm. we are done with the inode, and in the process of freeing |
1844 | * the state_owner. we keep this around to process errors | |
1845 | */ | |
1da177e4 LT |
1846 | switch (task->tk_status) { |
1847 | case 0: | |
45328c35 | 1848 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1849 | renew_lease(server, calldata->timestamp); |
88069f77 TM |
1850 | nfs4_close_clear_stateid_flags(state, |
1851 | calldata->arg.fmode); | |
1da177e4 LT |
1852 | break; |
1853 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1854 | case -NFS4ERR_OLD_STATEID: |
1855 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1856 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1857 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1858 | break; |
1da177e4 | 1859 | default: |
72211dbe TM |
1860 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
1861 | rpc_restart_call_prepare(task); | |
1da177e4 | 1862 | } |
72211dbe | 1863 | nfs_release_seqid(calldata->arg.seqid); |
516a6af6 | 1864 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1865 | } |
1866 | ||
4ce70ada | 1867 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1868 | { |
4ce70ada | 1869 | struct nfs4_closedata *calldata = data; |
9512135d | 1870 | struct nfs4_state *state = calldata->state; |
88069f77 | 1871 | int call_close = 0; |
9512135d | 1872 | |
963d8fe5 | 1873 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1874 | return; |
003707c7 | 1875 | |
88069f77 TM |
1876 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
1877 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
4cecb76f | 1878 | spin_lock(&state->owner->so_lock); |
003707c7 | 1879 | /* Calculate the change in open mode */ |
e7616923 | 1880 | if (state->n_rdwr == 0) { |
003707c7 | 1881 | if (state->n_rdonly == 0) { |
88069f77 TM |
1882 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
1883 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1884 | calldata->arg.fmode &= ~FMODE_READ; | |
003707c7 TM |
1885 | } |
1886 | if (state->n_wronly == 0) { | |
88069f77 TM |
1887 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
1888 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1889 | calldata->arg.fmode &= ~FMODE_WRITE; | |
003707c7 | 1890 | } |
e7616923 | 1891 | } |
4cecb76f | 1892 | spin_unlock(&state->owner->so_lock); |
88069f77 TM |
1893 | |
1894 | if (!call_close) { | |
963d8fe5 TM |
1895 | /* Note: exit _without_ calling nfs4_close_done */ |
1896 | task->tk_action = NULL; | |
9512135d TM |
1897 | return; |
1898 | } | |
88069f77 TM |
1899 | |
1900 | if (calldata->arg.fmode == 0) | |
1901 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
1902 | ||
516a6af6 | 1903 | nfs_fattr_init(calldata->res.fattr); |
26e976a8 | 1904 | calldata->timestamp = jiffies; |
035168ab | 1905 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
19ddab06 AA |
1906 | &calldata->arg.seq_args, &calldata->res.seq_res, |
1907 | 1, task)) | |
1908 | return; | |
5138fde0 | 1909 | rpc_call_start(task); |
1da177e4 LT |
1910 | } |
1911 | ||
963d8fe5 | 1912 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1913 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1914 | .rpc_call_done = nfs4_close_done, |
1915 | .rpc_release = nfs4_free_closedata, | |
1916 | }; | |
1917 | ||
1da177e4 LT |
1918 | /* |
1919 | * It is possible for data to be read/written from a mem-mapped file | |
1920 | * after the sys_close call (which hits the vfs layer as a flush). | |
1921 | * This means that we can't safely call nfsv4 close on a file until | |
1922 | * the inode is cleared. This in turn means that we are not good | |
1923 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1924 | * share state even when we are done with one of the three share | |
1925 | * stateid's in the inode. | |
1926 | * | |
1927 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1928 | */ | |
8535b2be | 1929 | int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) |
1da177e4 | 1930 | { |
4a35bd41 | 1931 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1932 | struct nfs4_closedata *calldata; |
b39e625b TM |
1933 | struct nfs4_state_owner *sp = state->owner; |
1934 | struct rpc_task *task; | |
5138fde0 TM |
1935 | struct rpc_message msg = { |
1936 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1937 | .rpc_cred = state->owner->so_cred, | |
1938 | }; | |
c970aa85 TM |
1939 | struct rpc_task_setup task_setup_data = { |
1940 | .rpc_client = server->client, | |
5138fde0 | 1941 | .rpc_message = &msg, |
c970aa85 | 1942 | .callback_ops = &nfs4_close_ops, |
101070ca | 1943 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1944 | .flags = RPC_TASK_ASYNC, |
1945 | }; | |
9512135d | 1946 | int status = -ENOMEM; |
1da177e4 | 1947 | |
8535b2be | 1948 | calldata = kzalloc(sizeof(*calldata), gfp_mask); |
1da177e4 | 1949 | if (calldata == NULL) |
9512135d | 1950 | goto out; |
4a35bd41 | 1951 | calldata->inode = state->inode; |
1da177e4 | 1952 | calldata->state = state; |
4a35bd41 | 1953 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1954 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1955 | /* Serialization for the sequence id */ |
8535b2be | 1956 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
9512135d TM |
1957 | if (calldata->arg.seqid == NULL) |
1958 | goto out_free_calldata; | |
dc0b027d | 1959 | calldata->arg.fmode = 0; |
a65318bf | 1960 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1961 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1962 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1963 | calldata->res.server = server; |
5f7dbd5c | 1964 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
f6948697 AV |
1965 | path_get(path); |
1966 | calldata->path = *path; | |
9512135d | 1967 | |
5138fde0 TM |
1968 | msg.rpc_argp = &calldata->arg, |
1969 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1970 | task_setup_data.callback_data = calldata; |
1971 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1972 | if (IS_ERR(task)) |
1973 | return PTR_ERR(task); | |
a49c3c77 TM |
1974 | status = 0; |
1975 | if (wait) | |
1976 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1977 | rpc_put_task(task); |
a49c3c77 | 1978 | return status; |
9512135d TM |
1979 | out_free_calldata: |
1980 | kfree(calldata); | |
1981 | out: | |
b39e625b TM |
1982 | nfs4_put_open_state(state); |
1983 | nfs4_put_state_owner(sp); | |
9512135d | 1984 | return status; |
1da177e4 LT |
1985 | } |
1986 | ||
dc0b027d | 1987 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1988 | { |
1989 | struct file *filp; | |
1b45c46c | 1990 | int ret; |
02a913a7 | 1991 | |
1b45c46c | 1992 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1993 | if (fmode & FMODE_EXEC) { |
af22f94a | 1994 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1995 | state->owner->so_cred, |
1996 | nd->intent.open.flags); | |
1997 | if (ret < 0) | |
1998 | goto out_close; | |
1999 | } | |
4a35bd41 | 2000 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
2001 | if (!IS_ERR(filp)) { |
2002 | struct nfs_open_context *ctx; | |
cd3758e3 | 2003 | ctx = nfs_file_open_context(filp); |
02a913a7 | 2004 | ctx->state = state; |
95cf959b TM |
2005 | return 0; |
2006 | } | |
1b45c46c TM |
2007 | ret = PTR_ERR(filp); |
2008 | out_close: | |
dc0b027d | 2009 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 2010 | return ret; |
02a913a7 TM |
2011 | } |
2012 | ||
2013 | struct dentry * | |
1da177e4 LT |
2014 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
2015 | { | |
ad389da7 | 2016 | struct path path = { |
4ac91378 | 2017 | .mnt = nd->path.mnt, |
ad389da7 TM |
2018 | .dentry = dentry, |
2019 | }; | |
4ac91378 | 2020 | struct dentry *parent; |
1da177e4 LT |
2021 | struct iattr attr; |
2022 | struct rpc_cred *cred; | |
2023 | struct nfs4_state *state; | |
02a913a7 | 2024 | struct dentry *res; |
dc0b027d | 2025 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
2026 | |
2027 | if (nd->flags & LOOKUP_CREATE) { | |
2028 | attr.ia_mode = nd->intent.open.create_mode; | |
2029 | attr.ia_valid = ATTR_MODE; | |
2030 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 2031 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
2032 | } else { |
2033 | attr.ia_valid = 0; | |
2034 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
2035 | } | |
2036 | ||
98a8e323 | 2037 | cred = rpc_lookup_cred(); |
1da177e4 | 2038 | if (IS_ERR(cred)) |
02a913a7 | 2039 | return (struct dentry *)cred; |
565277f6 TM |
2040 | parent = dentry->d_parent; |
2041 | /* Protect against concurrent sillydeletes */ | |
2042 | nfs_block_sillyrename(parent); | |
dc0b027d | 2043 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 2044 | put_rpccred(cred); |
02a913a7 | 2045 | if (IS_ERR(state)) { |
d75340cc | 2046 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 2047 | d_add(dentry, NULL); |
d75340cc TM |
2048 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
2049 | } | |
565277f6 | 2050 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
2051 | return (struct dentry *)state; |
2052 | } | |
24ac23ab | 2053 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 2054 | if (res != NULL) |
deee9369 | 2055 | path.dentry = res; |
d75340cc | 2056 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 2057 | nfs_unblock_sillyrename(parent); |
dc0b027d | 2058 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2059 | return res; |
1da177e4 LT |
2060 | } |
2061 | ||
2062 | int | |
02a913a7 | 2063 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 2064 | { |
ad389da7 | 2065 | struct path path = { |
4ac91378 | 2066 | .mnt = nd->path.mnt, |
ad389da7 TM |
2067 | .dentry = dentry, |
2068 | }; | |
1da177e4 LT |
2069 | struct rpc_cred *cred; |
2070 | struct nfs4_state *state; | |
dc0b027d | 2071 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 2072 | |
98a8e323 | 2073 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2074 | if (IS_ERR(cred)) |
2075 | return PTR_ERR(cred); | |
dc0b027d | 2076 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 2077 | put_rpccred(cred); |
02a913a7 TM |
2078 | if (IS_ERR(state)) { |
2079 | switch (PTR_ERR(state)) { | |
2080 | case -EPERM: | |
2081 | case -EACCES: | |
2082 | case -EDQUOT: | |
2083 | case -ENOSPC: | |
2084 | case -EROFS: | |
04287f97 | 2085 | return PTR_ERR(state); |
b87c0adf CL |
2086 | default: |
2087 | goto out_drop; | |
02a913a7 | 2088 | } |
02a913a7 | 2089 | } |
24ac23ab | 2090 | if (state->inode == dentry->d_inode) { |
d75340cc | 2091 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 2092 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
2093 | return 1; |
2094 | } | |
dc0b027d | 2095 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
2096 | out_drop: |
2097 | d_drop(dentry); | |
1da177e4 LT |
2098 | return 0; |
2099 | } | |
2100 | ||
1185a552 | 2101 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
7fe5c398 TM |
2102 | { |
2103 | if (ctx->state == NULL) | |
2104 | return; | |
2105 | if (is_sync) | |
2106 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
2107 | else | |
2108 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
2109 | } | |
1da177e4 LT |
2110 | |
2111 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2112 | { | |
43652ad5 BH |
2113 | struct nfs4_server_caps_arg args = { |
2114 | .fhandle = fhandle, | |
2115 | }; | |
1da177e4 LT |
2116 | struct nfs4_server_caps_res res = {}; |
2117 | struct rpc_message msg = { | |
2118 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 2119 | .rpc_argp = &args, |
1da177e4 LT |
2120 | .rpc_resp = &res, |
2121 | }; | |
2122 | int status; | |
2123 | ||
cccef3b9 | 2124 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2125 | if (status == 0) { |
2126 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
62ab460c TM |
2127 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
2128 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2129 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2130 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2131 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
1da177e4 LT |
2132 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
2133 | server->caps |= NFS_CAP_ACLS; | |
2134 | if (res.has_links != 0) | |
2135 | server->caps |= NFS_CAP_HARDLINKS; | |
2136 | if (res.has_symlinks != 0) | |
2137 | server->caps |= NFS_CAP_SYMLINKS; | |
62ab460c TM |
2138 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
2139 | server->caps |= NFS_CAP_FILEID; | |
2140 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2141 | server->caps |= NFS_CAP_MODE; | |
2142 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2143 | server->caps |= NFS_CAP_NLINK; | |
2144 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2145 | server->caps |= NFS_CAP_OWNER; | |
2146 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2147 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2148 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2149 | server->caps |= NFS_CAP_ATIME; | |
2150 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2151 | server->caps |= NFS_CAP_CTIME; | |
2152 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2153 | server->caps |= NFS_CAP_MTIME; | |
2154 | ||
a65318bf TM |
2155 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
2156 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2157 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
2158 | server->acl_bitmask = res.acl_bitmask; |
2159 | } | |
cccef3b9 | 2160 | |
1da177e4 LT |
2161 | return status; |
2162 | } | |
2163 | ||
55a97593 | 2164 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
2165 | { |
2166 | struct nfs4_exception exception = { }; | |
2167 | int err; | |
2168 | do { | |
2169 | err = nfs4_handle_exception(server, | |
2170 | _nfs4_server_capabilities(server, fhandle), | |
2171 | &exception); | |
2172 | } while (exception.retry); | |
2173 | return err; | |
2174 | } | |
2175 | ||
2176 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2177 | struct nfs_fsinfo *info) | |
2178 | { | |
1da177e4 LT |
2179 | struct nfs4_lookup_root_arg args = { |
2180 | .bitmask = nfs4_fattr_bitmap, | |
2181 | }; | |
2182 | struct nfs4_lookup_res res = { | |
2183 | .server = server, | |
0e574af1 | 2184 | .fattr = info->fattr, |
1da177e4 LT |
2185 | .fh = fhandle, |
2186 | }; | |
2187 | struct rpc_message msg = { | |
2188 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2189 | .rpc_argp = &args, | |
2190 | .rpc_resp = &res, | |
2191 | }; | |
008f55d0 | 2192 | |
0e574af1 | 2193 | nfs_fattr_init(info->fattr); |
fccba804 | 2194 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2195 | } |
2196 | ||
2197 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2198 | struct nfs_fsinfo *info) | |
2199 | { | |
2200 | struct nfs4_exception exception = { }; | |
2201 | int err; | |
2202 | do { | |
2203 | err = nfs4_handle_exception(server, | |
2204 | _nfs4_lookup_root(server, fhandle, info), | |
2205 | &exception); | |
2206 | } while (exception.retry); | |
2207 | return err; | |
2208 | } | |
2209 | ||
54ceac45 DH |
2210 | /* |
2211 | * get the file handle for the "/" directory on the server | |
2212 | */ | |
1da177e4 | 2213 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 2214 | struct nfs_fsinfo *info) |
1da177e4 | 2215 | { |
1da177e4 LT |
2216 | int status; |
2217 | ||
1da177e4 | 2218 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2219 | if (status == 0) |
2220 | status = nfs4_server_capabilities(server, fhandle); | |
2221 | if (status == 0) | |
2222 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2223 | return nfs4_map_errors(status); |
1da177e4 LT |
2224 | } |
2225 | ||
6b97fd3d MN |
2226 | /* |
2227 | * Get locations and (maybe) other attributes of a referral. | |
2228 | * Note that we'll actually follow the referral later when | |
2229 | * we detect fsid mismatch in inode revalidation | |
2230 | */ | |
56659e99 | 2231 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2232 | { |
2233 | int status = -ENOMEM; | |
2234 | struct page *page = NULL; | |
2235 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2236 | |
2237 | page = alloc_page(GFP_KERNEL); | |
2238 | if (page == NULL) | |
2239 | goto out; | |
2240 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2241 | if (locations == NULL) | |
2242 | goto out; | |
2243 | ||
c228fd3a | 2244 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2245 | if (status != 0) |
2246 | goto out; | |
2247 | /* Make sure server returned a different fsid for the referral */ | |
2248 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2249 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2250 | status = -EIO; |
2251 | goto out; | |
2252 | } | |
2253 | ||
2254 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2255 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2256 | if (!fattr->mode) | |
2257 | fattr->mode = S_IFDIR; | |
2258 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2259 | out: | |
2260 | if (page) | |
2261 | __free_page(page); | |
2262 | if (locations) | |
2263 | kfree(locations); | |
2264 | return status; | |
2265 | } | |
2266 | ||
1da177e4 LT |
2267 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2268 | { | |
2269 | struct nfs4_getattr_arg args = { | |
2270 | .fh = fhandle, | |
2271 | .bitmask = server->attr_bitmask, | |
2272 | }; | |
2273 | struct nfs4_getattr_res res = { | |
2274 | .fattr = fattr, | |
2275 | .server = server, | |
2276 | }; | |
2277 | struct rpc_message msg = { | |
2278 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2279 | .rpc_argp = &args, | |
2280 | .rpc_resp = &res, | |
2281 | }; | |
2282 | ||
0e574af1 | 2283 | nfs_fattr_init(fattr); |
cccef3b9 | 2284 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2285 | } |
2286 | ||
2287 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2288 | { | |
2289 | struct nfs4_exception exception = { }; | |
2290 | int err; | |
2291 | do { | |
2292 | err = nfs4_handle_exception(server, | |
2293 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2294 | &exception); | |
2295 | } while (exception.retry); | |
2296 | return err; | |
2297 | } | |
2298 | ||
2299 | /* | |
2300 | * The file is not closed if it is opened due to the a request to change | |
2301 | * the size of the file. The open call will not be needed once the | |
2302 | * VFS layer lookup-intents are implemented. | |
2303 | * | |
2304 | * Close is called when the inode is destroyed. | |
2305 | * If we haven't opened the file for O_WRONLY, we | |
2306 | * need to in the size_change case to obtain a stateid. | |
2307 | * | |
2308 | * Got race? | |
2309 | * Because OPEN is always done by name in nfsv4, it is | |
2310 | * possible that we opened a different file by the same | |
2311 | * name. We can recognize this race condition, but we | |
2312 | * can't do anything about it besides returning an error. | |
2313 | * | |
2314 | * This will be fixed with VFS changes (lookup-intent). | |
2315 | */ | |
2316 | static int | |
2317 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2318 | struct iattr *sattr) | |
2319 | { | |
08e9eac4 | 2320 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2321 | struct rpc_cred *cred = NULL; |
d530838b | 2322 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2323 | int status; |
2324 | ||
0e574af1 | 2325 | nfs_fattr_init(fattr); |
1da177e4 | 2326 | |
d530838b | 2327 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2328 | if (sattr->ia_valid & ATTR_FILE) { |
2329 | struct nfs_open_context *ctx; | |
2330 | ||
2331 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2332 | if (ctx) { |
2333 | cred = ctx->cred; | |
2334 | state = ctx->state; | |
2335 | } | |
659bfcd6 | 2336 | } |
08e9eac4 | 2337 | |
659bfcd6 | 2338 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2339 | if (status == 0) |
2340 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2341 | return status; |
2342 | } | |
2343 | ||
56659e99 TM |
2344 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2345 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2346 | struct nfs_fattr *fattr) |
2347 | { | |
2348 | int status; | |
2349 | struct nfs4_lookup_arg args = { | |
2350 | .bitmask = server->attr_bitmask, | |
2351 | .dir_fh = dirfh, | |
2352 | .name = name, | |
2353 | }; | |
2354 | struct nfs4_lookup_res res = { | |
2355 | .server = server, | |
2356 | .fattr = fattr, | |
2357 | .fh = fhandle, | |
2358 | }; | |
2359 | struct rpc_message msg = { | |
2360 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2361 | .rpc_argp = &args, | |
2362 | .rpc_resp = &res, | |
2363 | }; | |
2364 | ||
2365 | nfs_fattr_init(fattr); | |
2366 | ||
2367 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2368 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2369 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2370 | return status; |
2371 | } | |
2372 | ||
2373 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2374 | struct qstr *name, struct nfs_fh *fhandle, | |
2375 | struct nfs_fattr *fattr) | |
2376 | { | |
2377 | struct nfs4_exception exception = { }; | |
2378 | int err; | |
2379 | do { | |
4e56e082 TM |
2380 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2381 | /* FIXME: !!!! */ | |
2382 | if (err == -NFS4ERR_MOVED) { | |
2383 | err = -EREMOTE; | |
2384 | break; | |
2385 | } | |
2386 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2387 | } while (exception.retry); |
2388 | return err; | |
2389 | } | |
2390 | ||
56659e99 | 2391 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2392 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2393 | { | |
4e56e082 | 2394 | int status; |
1da177e4 LT |
2395 | |
2396 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2397 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2398 | if (status == -NFS4ERR_MOVED) |
2399 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2400 | dprintk("NFS reply lookup: %d\n", status); |
2401 | return status; | |
2402 | } | |
2403 | ||
2404 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2405 | { | |
2406 | struct nfs4_exception exception = { }; | |
2407 | int err; | |
2408 | do { | |
2409 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2410 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2411 | &exception); | |
2412 | } while (exception.retry); | |
2413 | return err; | |
2414 | } | |
2415 | ||
2416 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2417 | { | |
76b32999 | 2418 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2419 | struct nfs4_accessargs args = { |
2420 | .fh = NFS_FH(inode), | |
76b32999 TM |
2421 | .bitmask = server->attr_bitmask, |
2422 | }; | |
2423 | struct nfs4_accessres res = { | |
2424 | .server = server, | |
1da177e4 | 2425 | }; |
1da177e4 LT |
2426 | struct rpc_message msg = { |
2427 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2428 | .rpc_argp = &args, | |
2429 | .rpc_resp = &res, | |
2430 | .rpc_cred = entry->cred, | |
2431 | }; | |
2432 | int mode = entry->mask; | |
2433 | int status; | |
2434 | ||
2435 | /* | |
2436 | * Determine which access bits we want to ask for... | |
2437 | */ | |
2438 | if (mode & MAY_READ) | |
2439 | args.access |= NFS4_ACCESS_READ; | |
2440 | if (S_ISDIR(inode->i_mode)) { | |
2441 | if (mode & MAY_WRITE) | |
2442 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2443 | if (mode & MAY_EXEC) | |
2444 | args.access |= NFS4_ACCESS_LOOKUP; | |
2445 | } else { | |
2446 | if (mode & MAY_WRITE) | |
2447 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2448 | if (mode & MAY_EXEC) | |
2449 | args.access |= NFS4_ACCESS_EXECUTE; | |
2450 | } | |
c407d41a TM |
2451 | |
2452 | res.fattr = nfs_alloc_fattr(); | |
2453 | if (res.fattr == NULL) | |
2454 | return -ENOMEM; | |
2455 | ||
cccef3b9 | 2456 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2457 | if (!status) { |
2458 | entry->mask = 0; | |
2459 | if (res.access & NFS4_ACCESS_READ) | |
2460 | entry->mask |= MAY_READ; | |
2461 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2462 | entry->mask |= MAY_WRITE; | |
2463 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2464 | entry->mask |= MAY_EXEC; | |
c407d41a | 2465 | nfs_refresh_inode(inode, res.fattr); |
1da177e4 | 2466 | } |
c407d41a | 2467 | nfs_free_fattr(res.fattr); |
1da177e4 LT |
2468 | return status; |
2469 | } | |
2470 | ||
2471 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2472 | { | |
2473 | struct nfs4_exception exception = { }; | |
2474 | int err; | |
2475 | do { | |
2476 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2477 | _nfs4_proc_access(inode, entry), | |
2478 | &exception); | |
2479 | } while (exception.retry); | |
2480 | return err; | |
2481 | } | |
2482 | ||
2483 | /* | |
2484 | * TODO: For the time being, we don't try to get any attributes | |
2485 | * along with any of the zero-copy operations READ, READDIR, | |
2486 | * READLINK, WRITE. | |
2487 | * | |
2488 | * In the case of the first three, we want to put the GETATTR | |
2489 | * after the read-type operation -- this is because it is hard | |
2490 | * to predict the length of a GETATTR response in v4, and thus | |
2491 | * align the READ data correctly. This means that the GETATTR | |
2492 | * may end up partially falling into the page cache, and we should | |
2493 | * shift it into the 'tail' of the xdr_buf before processing. | |
2494 | * To do this efficiently, we need to know the total length | |
2495 | * of data received, which doesn't seem to be available outside | |
2496 | * of the RPC layer. | |
2497 | * | |
2498 | * In the case of WRITE, we also want to put the GETATTR after | |
2499 | * the operation -- in this case because we want to make sure | |
2500 | * we get the post-operation mtime and size. This means that | |
2501 | * we can't use xdr_encode_pages() as written: we need a variant | |
2502 | * of it which would leave room in the 'tail' iovec. | |
2503 | * | |
2504 | * Both of these changes to the XDR layer would in fact be quite | |
2505 | * minor, but I decided to leave them for a subsequent patch. | |
2506 | */ | |
2507 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2508 | unsigned int pgbase, unsigned int pglen) | |
2509 | { | |
2510 | struct nfs4_readlink args = { | |
2511 | .fh = NFS_FH(inode), | |
2512 | .pgbase = pgbase, | |
2513 | .pglen = pglen, | |
2514 | .pages = &page, | |
2515 | }; | |
f50c7000 | 2516 | struct nfs4_readlink_res res; |
1da177e4 LT |
2517 | struct rpc_message msg = { |
2518 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2519 | .rpc_argp = &args, | |
f50c7000 | 2520 | .rpc_resp = &res, |
1da177e4 LT |
2521 | }; |
2522 | ||
cccef3b9 | 2523 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2524 | } |
2525 | ||
2526 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2527 | unsigned int pgbase, unsigned int pglen) | |
2528 | { | |
2529 | struct nfs4_exception exception = { }; | |
2530 | int err; | |
2531 | do { | |
2532 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2533 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2534 | &exception); | |
2535 | } while (exception.retry); | |
2536 | return err; | |
2537 | } | |
2538 | ||
1da177e4 LT |
2539 | /* |
2540 | * Got race? | |
2541 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2542 | * Until then, this create/open method is prone to inefficiency and race | |
2543 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2544 | * placed on the wire. | |
2545 | * | |
2546 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2547 | * The file will be opened again in the subsequent VFS open call | |
2548 | * (nfs4_proc_file_open). | |
2549 | * | |
2550 | * The open for read will just hang around to be used by any process that | |
2551 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2552 | */ | |
2553 | ||
2554 | static int | |
2555 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2556 | int flags, struct nameidata *nd) |
1da177e4 | 2557 | { |
ad389da7 | 2558 | struct path path = { |
4ac91378 | 2559 | .mnt = nd->path.mnt, |
ad389da7 TM |
2560 | .dentry = dentry, |
2561 | }; | |
1da177e4 LT |
2562 | struct nfs4_state *state; |
2563 | struct rpc_cred *cred; | |
dc0b027d | 2564 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2565 | int status = 0; |
2566 | ||
98a8e323 | 2567 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2568 | if (IS_ERR(cred)) { |
2569 | status = PTR_ERR(cred); | |
2570 | goto out; | |
2571 | } | |
dc0b027d | 2572 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2573 | d_drop(dentry); |
1da177e4 LT |
2574 | if (IS_ERR(state)) { |
2575 | status = PTR_ERR(state); | |
659bfcd6 | 2576 | goto out_putcred; |
1da177e4 | 2577 | } |
d4d9cdcb | 2578 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2579 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
ad389da7 | 2580 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2581 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2582 | else |
dc0b027d | 2583 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2584 | out_putcred: |
2585 | put_rpccred(cred); | |
1da177e4 LT |
2586 | out: |
2587 | return status; | |
2588 | } | |
2589 | ||
2590 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2591 | { | |
16e42959 | 2592 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2593 | struct nfs_removeargs args = { |
1da177e4 | 2594 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2595 | .name.len = name->len, |
2596 | .name.name = name->name, | |
16e42959 TM |
2597 | .bitmask = server->attr_bitmask, |
2598 | }; | |
4fdc17b2 | 2599 | struct nfs_removeres res = { |
16e42959 | 2600 | .server = server, |
1da177e4 | 2601 | }; |
1da177e4 | 2602 | struct rpc_message msg = { |
4fdc17b2 TM |
2603 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2604 | .rpc_argp = &args, | |
2605 | .rpc_resp = &res, | |
1da177e4 | 2606 | }; |
d346890b TM |
2607 | int status = -ENOMEM; |
2608 | ||
2609 | res.dir_attr = nfs_alloc_fattr(); | |
2610 | if (res.dir_attr == NULL) | |
2611 | goto out; | |
1da177e4 | 2612 | |
cccef3b9 | 2613 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2614 | if (status == 0) { |
2615 | update_changeattr(dir, &res.cinfo); | |
d346890b | 2616 | nfs_post_op_update_inode(dir, res.dir_attr); |
16e42959 | 2617 | } |
d346890b TM |
2618 | nfs_free_fattr(res.dir_attr); |
2619 | out: | |
1da177e4 LT |
2620 | return status; |
2621 | } | |
2622 | ||
2623 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2624 | { | |
2625 | struct nfs4_exception exception = { }; | |
2626 | int err; | |
2627 | do { | |
2628 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2629 | _nfs4_proc_remove(dir, name), | |
2630 | &exception); | |
2631 | } while (exception.retry); | |
2632 | return err; | |
2633 | } | |
2634 | ||
e4eff1a6 | 2635 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2636 | { |
e4eff1a6 TM |
2637 | struct nfs_server *server = NFS_SERVER(dir); |
2638 | struct nfs_removeargs *args = msg->rpc_argp; | |
2639 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2640 | |
a65318bf | 2641 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2642 | res->server = server; |
1da177e4 | 2643 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2644 | } |
2645 | ||
e4eff1a6 | 2646 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2647 | { |
e4eff1a6 TM |
2648 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2649 | ||
472cfbd9 | 2650 | nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); |
9e33bed5 | 2651 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2652 | return 0; |
2653 | update_changeattr(dir, &res->cinfo); | |
d346890b | 2654 | nfs_post_op_update_inode(dir, res->dir_attr); |
e4eff1a6 | 2655 | return 1; |
1da177e4 LT |
2656 | } |
2657 | ||
2658 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2659 | struct inode *new_dir, struct qstr *new_name) | |
2660 | { | |
6caf2c82 | 2661 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2662 | struct nfs4_rename_arg arg = { |
2663 | .old_dir = NFS_FH(old_dir), | |
2664 | .new_dir = NFS_FH(new_dir), | |
2665 | .old_name = old_name, | |
2666 | .new_name = new_name, | |
6caf2c82 TM |
2667 | .bitmask = server->attr_bitmask, |
2668 | }; | |
6caf2c82 TM |
2669 | struct nfs4_rename_res res = { |
2670 | .server = server, | |
1da177e4 | 2671 | }; |
1da177e4 LT |
2672 | struct rpc_message msg = { |
2673 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2674 | .rpc_argp = &arg, | |
2675 | .rpc_resp = &res, | |
2676 | }; | |
011fff72 | 2677 | int status = -ENOMEM; |
1da177e4 | 2678 | |
011fff72 TM |
2679 | res.old_fattr = nfs_alloc_fattr(); |
2680 | res.new_fattr = nfs_alloc_fattr(); | |
2681 | if (res.old_fattr == NULL || res.new_fattr == NULL) | |
2682 | goto out; | |
1da177e4 | 2683 | |
011fff72 | 2684 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2685 | if (!status) { |
2686 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2687 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2688 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2689 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 | 2690 | } |
011fff72 TM |
2691 | out: |
2692 | nfs_free_fattr(res.new_fattr); | |
2693 | nfs_free_fattr(res.old_fattr); | |
1da177e4 LT |
2694 | return status; |
2695 | } | |
2696 | ||
2697 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2698 | struct inode *new_dir, struct qstr *new_name) | |
2699 | { | |
2700 | struct nfs4_exception exception = { }; | |
2701 | int err; | |
2702 | do { | |
2703 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2704 | _nfs4_proc_rename(old_dir, old_name, | |
2705 | new_dir, new_name), | |
2706 | &exception); | |
2707 | } while (exception.retry); | |
2708 | return err; | |
2709 | } | |
2710 | ||
2711 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2712 | { | |
91ba2eee | 2713 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2714 | struct nfs4_link_arg arg = { |
2715 | .fh = NFS_FH(inode), | |
2716 | .dir_fh = NFS_FH(dir), | |
2717 | .name = name, | |
91ba2eee TM |
2718 | .bitmask = server->attr_bitmask, |
2719 | }; | |
91ba2eee TM |
2720 | struct nfs4_link_res res = { |
2721 | .server = server, | |
1da177e4 | 2722 | }; |
1da177e4 LT |
2723 | struct rpc_message msg = { |
2724 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2725 | .rpc_argp = &arg, | |
91ba2eee | 2726 | .rpc_resp = &res, |
1da177e4 | 2727 | }; |
136f2627 TM |
2728 | int status = -ENOMEM; |
2729 | ||
2730 | res.fattr = nfs_alloc_fattr(); | |
2731 | res.dir_attr = nfs_alloc_fattr(); | |
2732 | if (res.fattr == NULL || res.dir_attr == NULL) | |
2733 | goto out; | |
1da177e4 | 2734 | |
cccef3b9 | 2735 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2736 | if (!status) { |
2737 | update_changeattr(dir, &res.cinfo); | |
2738 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2739 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2740 | } |
136f2627 TM |
2741 | out: |
2742 | nfs_free_fattr(res.dir_attr); | |
2743 | nfs_free_fattr(res.fattr); | |
1da177e4 LT |
2744 | return status; |
2745 | } | |
2746 | ||
2747 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2748 | { | |
2749 | struct nfs4_exception exception = { }; | |
2750 | int err; | |
2751 | do { | |
2752 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2753 | _nfs4_proc_link(inode, dir, name), | |
2754 | &exception); | |
2755 | } while (exception.retry); | |
2756 | return err; | |
2757 | } | |
2758 | ||
57dc9a57 TM |
2759 | struct nfs4_createdata { |
2760 | struct rpc_message msg; | |
2761 | struct nfs4_create_arg arg; | |
2762 | struct nfs4_create_res res; | |
2763 | struct nfs_fh fh; | |
2764 | struct nfs_fattr fattr; | |
2765 | struct nfs_fattr dir_fattr; | |
2766 | }; | |
2767 | ||
2768 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2769 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2770 | { | |
2771 | struct nfs4_createdata *data; | |
2772 | ||
2773 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2774 | if (data != NULL) { | |
2775 | struct nfs_server *server = NFS_SERVER(dir); | |
2776 | ||
2777 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2778 | data->msg.rpc_argp = &data->arg; | |
2779 | data->msg.rpc_resp = &data->res; | |
2780 | data->arg.dir_fh = NFS_FH(dir); | |
2781 | data->arg.server = server; | |
2782 | data->arg.name = name; | |
2783 | data->arg.attrs = sattr; | |
2784 | data->arg.ftype = ftype; | |
2785 | data->arg.bitmask = server->attr_bitmask; | |
2786 | data->res.server = server; | |
2787 | data->res.fh = &data->fh; | |
2788 | data->res.fattr = &data->fattr; | |
2789 | data->res.dir_fattr = &data->dir_fattr; | |
2790 | nfs_fattr_init(data->res.fattr); | |
2791 | nfs_fattr_init(data->res.dir_fattr); | |
2792 | } | |
2793 | return data; | |
2794 | } | |
2795 | ||
2796 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2797 | { | |
cccef3b9 AA |
2798 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2799 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2800 | if (status == 0) { |
2801 | update_changeattr(dir, &data->res.dir_cinfo); | |
2802 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2803 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2804 | } | |
2805 | return status; | |
2806 | } | |
2807 | ||
2808 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2809 | { | |
2810 | kfree(data); | |
2811 | } | |
2812 | ||
4f390c15 | 2813 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2814 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2815 | { |
57dc9a57 TM |
2816 | struct nfs4_createdata *data; |
2817 | int status = -ENAMETOOLONG; | |
1da177e4 | 2818 | |
94a6d753 | 2819 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2820 | goto out; |
4f390c15 | 2821 | |
57dc9a57 TM |
2822 | status = -ENOMEM; |
2823 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2824 | if (data == NULL) | |
2825 | goto out; | |
2826 | ||
2827 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2828 | data->arg.u.symlink.pages = &page; | |
2829 | data->arg.u.symlink.len = len; | |
1da177e4 | 2830 | |
57dc9a57 TM |
2831 | status = nfs4_do_create(dir, dentry, data); |
2832 | ||
2833 | nfs4_free_createdata(data); | |
2834 | out: | |
1da177e4 LT |
2835 | return status; |
2836 | } | |
2837 | ||
4f390c15 | 2838 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2839 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2840 | { |
2841 | struct nfs4_exception exception = { }; | |
2842 | int err; | |
2843 | do { | |
2844 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2845 | _nfs4_proc_symlink(dir, dentry, page, |
2846 | len, sattr), | |
1da177e4 LT |
2847 | &exception); |
2848 | } while (exception.retry); | |
2849 | return err; | |
2850 | } | |
2851 | ||
2852 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2853 | struct iattr *sattr) | |
2854 | { | |
57dc9a57 TM |
2855 | struct nfs4_createdata *data; |
2856 | int status = -ENOMEM; | |
1da177e4 | 2857 | |
57dc9a57 TM |
2858 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2859 | if (data == NULL) | |
2860 | goto out; | |
2861 | ||
2862 | status = nfs4_do_create(dir, dentry, data); | |
2863 | ||
2864 | nfs4_free_createdata(data); | |
2865 | out: | |
1da177e4 LT |
2866 | return status; |
2867 | } | |
2868 | ||
2869 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2870 | struct iattr *sattr) | |
2871 | { | |
2872 | struct nfs4_exception exception = { }; | |
2873 | int err; | |
2874 | do { | |
2875 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2876 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2877 | &exception); | |
2878 | } while (exception.retry); | |
2879 | return err; | |
2880 | } | |
2881 | ||
2882 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2883 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2884 | { | |
2885 | struct inode *dir = dentry->d_inode; | |
2886 | struct nfs4_readdir_arg args = { | |
2887 | .fh = NFS_FH(dir), | |
2888 | .pages = &page, | |
2889 | .pgbase = 0, | |
2890 | .count = count, | |
96d25e53 | 2891 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
1da177e4 LT |
2892 | }; |
2893 | struct nfs4_readdir_res res; | |
2894 | struct rpc_message msg = { | |
2895 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2896 | .rpc_argp = &args, | |
2897 | .rpc_resp = &res, | |
2898 | .rpc_cred = cred, | |
2899 | }; | |
2900 | int status; | |
2901 | ||
3110ff80 | 2902 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2903 | dentry->d_parent->d_name.name, |
2904 | dentry->d_name.name, | |
2905 | (unsigned long long)cookie); | |
1da177e4 LT |
2906 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2907 | res.pgbase = args.pgbase; | |
cccef3b9 | 2908 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2909 | if (status == 0) |
2910 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2911 | |
2912 | nfs_invalidate_atime(dir); | |
2913 | ||
3110ff80 | 2914 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2915 | return status; |
2916 | } | |
2917 | ||
2918 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2919 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2920 | { | |
2921 | struct nfs4_exception exception = { }; | |
2922 | int err; | |
2923 | do { | |
2924 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2925 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2926 | page, count, plus), | |
2927 | &exception); | |
2928 | } while (exception.retry); | |
2929 | return err; | |
2930 | } | |
2931 | ||
2932 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2933 | struct iattr *sattr, dev_t rdev) | |
2934 | { | |
57dc9a57 TM |
2935 | struct nfs4_createdata *data; |
2936 | int mode = sattr->ia_mode; | |
2937 | int status = -ENOMEM; | |
1da177e4 LT |
2938 | |
2939 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2940 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2941 | |
2942 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2943 | if (data == NULL) | |
2944 | goto out; | |
2945 | ||
1da177e4 | 2946 | if (S_ISFIFO(mode)) |
57dc9a57 | 2947 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2948 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2949 | data->arg.ftype = NF4BLK; |
2950 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2951 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2952 | } |
2953 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2954 | data->arg.ftype = NF4CHR; |
2955 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2956 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2957 | } |
1da177e4 | 2958 | |
57dc9a57 TM |
2959 | status = nfs4_do_create(dir, dentry, data); |
2960 | ||
2961 | nfs4_free_createdata(data); | |
2962 | out: | |
1da177e4 LT |
2963 | return status; |
2964 | } | |
2965 | ||
2966 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2967 | struct iattr *sattr, dev_t rdev) | |
2968 | { | |
2969 | struct nfs4_exception exception = { }; | |
2970 | int err; | |
2971 | do { | |
2972 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2973 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2974 | &exception); | |
2975 | } while (exception.retry); | |
2976 | return err; | |
2977 | } | |
2978 | ||
2979 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2980 | struct nfs_fsstat *fsstat) | |
2981 | { | |
2982 | struct nfs4_statfs_arg args = { | |
2983 | .fh = fhandle, | |
2984 | .bitmask = server->attr_bitmask, | |
2985 | }; | |
24ad148a BH |
2986 | struct nfs4_statfs_res res = { |
2987 | .fsstat = fsstat, | |
2988 | }; | |
1da177e4 LT |
2989 | struct rpc_message msg = { |
2990 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2991 | .rpc_argp = &args, | |
24ad148a | 2992 | .rpc_resp = &res, |
1da177e4 LT |
2993 | }; |
2994 | ||
0e574af1 | 2995 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2996 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2997 | } |
2998 | ||
2999 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
3000 | { | |
3001 | struct nfs4_exception exception = { }; | |
3002 | int err; | |
3003 | do { | |
3004 | err = nfs4_handle_exception(server, | |
3005 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
3006 | &exception); | |
3007 | } while (exception.retry); | |
3008 | return err; | |
3009 | } | |
3010 | ||
3011 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
3012 | struct nfs_fsinfo *fsinfo) | |
3013 | { | |
3014 | struct nfs4_fsinfo_arg args = { | |
3015 | .fh = fhandle, | |
3016 | .bitmask = server->attr_bitmask, | |
3017 | }; | |
3dda5e43 BH |
3018 | struct nfs4_fsinfo_res res = { |
3019 | .fsinfo = fsinfo, | |
3020 | }; | |
1da177e4 LT |
3021 | struct rpc_message msg = { |
3022 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
3023 | .rpc_argp = &args, | |
3dda5e43 | 3024 | .rpc_resp = &res, |
1da177e4 LT |
3025 | }; |
3026 | ||
cccef3b9 | 3027 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
3028 | } |
3029 | ||
3030 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3031 | { | |
3032 | struct nfs4_exception exception = { }; | |
3033 | int err; | |
3034 | ||
3035 | do { | |
3036 | err = nfs4_handle_exception(server, | |
3037 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
3038 | &exception); | |
3039 | } while (exception.retry); | |
3040 | return err; | |
3041 | } | |
3042 | ||
3043 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3044 | { | |
0e574af1 | 3045 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
3046 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
3047 | } | |
3048 | ||
3049 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3050 | struct nfs_pathconf *pathconf) | |
3051 | { | |
3052 | struct nfs4_pathconf_arg args = { | |
3053 | .fh = fhandle, | |
3054 | .bitmask = server->attr_bitmask, | |
3055 | }; | |
d45b2989 BH |
3056 | struct nfs4_pathconf_res res = { |
3057 | .pathconf = pathconf, | |
3058 | }; | |
1da177e4 LT |
3059 | struct rpc_message msg = { |
3060 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
3061 | .rpc_argp = &args, | |
d45b2989 | 3062 | .rpc_resp = &res, |
1da177e4 LT |
3063 | }; |
3064 | ||
3065 | /* None of the pathconf attributes are mandatory to implement */ | |
3066 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
3067 | memset(pathconf, 0, sizeof(*pathconf)); | |
3068 | return 0; | |
3069 | } | |
3070 | ||
0e574af1 | 3071 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 3072 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
3073 | } |
3074 | ||
3075 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3076 | struct nfs_pathconf *pathconf) | |
3077 | { | |
3078 | struct nfs4_exception exception = { }; | |
3079 | int err; | |
3080 | ||
3081 | do { | |
3082 | err = nfs4_handle_exception(server, | |
3083 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
3084 | &exception); | |
3085 | } while (exception.retry); | |
3086 | return err; | |
3087 | } | |
3088 | ||
ec06c096 | 3089 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 3090 | { |
ec06c096 | 3091 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3092 | |
f11c88af AA |
3093 | dprintk("--> %s\n", __func__); |
3094 | ||
f11c88af AA |
3095 | nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); |
3096 | ||
9e33bed5 | 3097 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
0110ee15 | 3098 | nfs_restart_rpc(task, server->nfs_client); |
ec06c096 | 3099 | return -EAGAIN; |
1da177e4 | 3100 | } |
8850df99 TM |
3101 | |
3102 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 3103 | if (task->tk_status > 0) |
ec06c096 TM |
3104 | renew_lease(server, data->timestamp); |
3105 | return 0; | |
1da177e4 LT |
3106 | } |
3107 | ||
bdc7f021 | 3108 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 3109 | { |
1da177e4 | 3110 | data->timestamp = jiffies; |
bdc7f021 | 3111 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
3112 | } |
3113 | ||
788e7a89 | 3114 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3115 | { |
1da177e4 LT |
3116 | struct inode *inode = data->inode; |
3117 | ||
def6ed7e AA |
3118 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
3119 | task->tk_status); | |
3120 | ||
9e33bed5 | 3121 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
0110ee15 | 3122 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3123 | return -EAGAIN; |
1da177e4 | 3124 | } |
4f9838c7 | 3125 | if (task->tk_status >= 0) { |
1da177e4 | 3126 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 3127 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 3128 | } |
788e7a89 | 3129 | return 0; |
1da177e4 LT |
3130 | } |
3131 | ||
bdc7f021 | 3132 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3133 | { |
bdc7f021 TM |
3134 | struct nfs_server *server = NFS_SERVER(data->inode); |
3135 | ||
a65318bf | 3136 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3137 | data->res.server = server; |
1da177e4 LT |
3138 | data->timestamp = jiffies; |
3139 | ||
bdc7f021 | 3140 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
3141 | } |
3142 | ||
788e7a89 | 3143 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3144 | { |
1da177e4 LT |
3145 | struct inode *inode = data->inode; |
3146 | ||
21d9a851 AA |
3147 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
3148 | task->tk_status); | |
9e33bed5 | 3149 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
0110ee15 | 3150 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3151 | return -EAGAIN; |
1da177e4 | 3152 | } |
9e08a3c5 | 3153 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 3154 | return 0; |
1da177e4 LT |
3155 | } |
3156 | ||
bdc7f021 | 3157 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3158 | { |
788e7a89 | 3159 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3160 | |
a65318bf | 3161 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3162 | data->res.server = server; |
bdc7f021 | 3163 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
3164 | } |
3165 | ||
9bc4e3ca CL |
3166 | struct nfs4_renewdata { |
3167 | struct nfs_client *client; | |
3168 | unsigned long timestamp; | |
3169 | }; | |
3170 | ||
1da177e4 LT |
3171 | /* |
3172 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3173 | * standalone procedure for queueing an asynchronous RENEW. | |
3174 | */ | |
9bc4e3ca | 3175 | static void nfs4_renew_release(void *calldata) |
dc96aef9 | 3176 | { |
9bc4e3ca CL |
3177 | struct nfs4_renewdata *data = calldata; |
3178 | struct nfs_client *clp = data->client; | |
dc96aef9 | 3179 | |
0851de06 AB |
3180 | if (atomic_read(&clp->cl_count) > 1) |
3181 | nfs4_schedule_state_renewal(clp); | |
3182 | nfs_put_client(clp); | |
9bc4e3ca | 3183 | kfree(data); |
dc96aef9 AB |
3184 | } |
3185 | ||
9bc4e3ca | 3186 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
1da177e4 | 3187 | { |
9bc4e3ca CL |
3188 | struct nfs4_renewdata *data = calldata; |
3189 | struct nfs_client *clp = data->client; | |
3190 | unsigned long timestamp = data->timestamp; | |
1da177e4 LT |
3191 | |
3192 | if (task->tk_status < 0) { | |
95baa25c TM |
3193 | /* Unless we're shutting down, schedule state recovery! */ |
3194 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
3195 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
3196 | return; |
3197 | } | |
3198 | spin_lock(&clp->cl_lock); | |
3199 | if (time_before(clp->cl_last_renewal,timestamp)) | |
3200 | clp->cl_last_renewal = timestamp; | |
3201 | spin_unlock(&clp->cl_lock); | |
3202 | } | |
3203 | ||
963d8fe5 TM |
3204 | static const struct rpc_call_ops nfs4_renew_ops = { |
3205 | .rpc_call_done = nfs4_renew_done, | |
dc96aef9 | 3206 | .rpc_release = nfs4_renew_release, |
963d8fe5 TM |
3207 | }; |
3208 | ||
adfa6f98 | 3209 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3210 | { |
3211 | struct rpc_message msg = { | |
3212 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3213 | .rpc_argp = clp, | |
b4454fe1 | 3214 | .rpc_cred = cred, |
1da177e4 | 3215 | }; |
9bc4e3ca | 3216 | struct nfs4_renewdata *data; |
1da177e4 | 3217 | |
0851de06 AB |
3218 | if (!atomic_inc_not_zero(&clp->cl_count)) |
3219 | return -EIO; | |
9bc4e3ca CL |
3220 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
3221 | if (data == NULL) | |
3222 | return -ENOMEM; | |
3223 | data->client = clp; | |
3224 | data->timestamp = jiffies; | |
1da177e4 | 3225 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
9bc4e3ca | 3226 | &nfs4_renew_ops, data); |
1da177e4 LT |
3227 | } |
3228 | ||
adfa6f98 | 3229 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3230 | { |
3231 | struct rpc_message msg = { | |
3232 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3233 | .rpc_argp = clp, | |
b4454fe1 | 3234 | .rpc_cred = cred, |
1da177e4 LT |
3235 | }; |
3236 | unsigned long now = jiffies; | |
3237 | int status; | |
3238 | ||
3239 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3240 | if (status < 0) | |
3241 | return status; | |
3242 | spin_lock(&clp->cl_lock); | |
3243 | if (time_before(clp->cl_last_renewal,now)) | |
3244 | clp->cl_last_renewal = now; | |
3245 | spin_unlock(&clp->cl_lock); | |
3246 | return 0; | |
3247 | } | |
3248 | ||
aa1870af BF |
3249 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3250 | { | |
3251 | return (server->caps & NFS_CAP_ACLS) | |
3252 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3253 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3254 | } | |
3255 | ||
3256 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3257 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3258 | * the stack. | |
3259 | */ | |
3260 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3261 | ||
3262 | static void buf_to_pages(const void *buf, size_t buflen, | |
3263 | struct page **pages, unsigned int *pgbase) | |
3264 | { | |
3265 | const void *p = buf; | |
3266 | ||
3267 | *pgbase = offset_in_page(buf); | |
3268 | p -= *pgbase; | |
3269 | while (p < buf + buflen) { | |
3270 | *(pages++) = virt_to_page(p); | |
3271 | p += PAGE_CACHE_SIZE; | |
3272 | } | |
3273 | } | |
3274 | ||
e50a1c2e BF |
3275 | struct nfs4_cached_acl { |
3276 | int cached; | |
3277 | size_t len; | |
3e9d4154 | 3278 | char data[0]; |
e50a1c2e BF |
3279 | }; |
3280 | ||
3281 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3282 | { | |
3283 | struct nfs_inode *nfsi = NFS_I(inode); | |
3284 | ||
3285 | spin_lock(&inode->i_lock); | |
3286 | kfree(nfsi->nfs4_acl); | |
3287 | nfsi->nfs4_acl = acl; | |
3288 | spin_unlock(&inode->i_lock); | |
3289 | } | |
3290 | ||
3291 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3292 | { | |
3293 | nfs4_set_cached_acl(inode, NULL); | |
3294 | } | |
3295 | ||
3296 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3297 | { | |
3298 | struct nfs_inode *nfsi = NFS_I(inode); | |
3299 | struct nfs4_cached_acl *acl; | |
3300 | int ret = -ENOENT; | |
3301 | ||
3302 | spin_lock(&inode->i_lock); | |
3303 | acl = nfsi->nfs4_acl; | |
3304 | if (acl == NULL) | |
3305 | goto out; | |
3306 | if (buf == NULL) /* user is just asking for length */ | |
3307 | goto out_len; | |
3308 | if (acl->cached == 0) | |
3309 | goto out; | |
3310 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3311 | if (acl->len > buflen) | |
3312 | goto out; | |
3313 | memcpy(buf, acl->data, acl->len); | |
3314 | out_len: | |
3315 | ret = acl->len; | |
3316 | out: | |
3317 | spin_unlock(&inode->i_lock); | |
3318 | return ret; | |
3319 | } | |
3320 | ||
3321 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3322 | { | |
3323 | struct nfs4_cached_acl *acl; | |
3324 | ||
3325 | if (buf && acl_len <= PAGE_SIZE) { | |
3326 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3327 | if (acl == NULL) | |
3328 | goto out; | |
3329 | acl->cached = 1; | |
3330 | memcpy(acl->data, buf, acl_len); | |
3331 | } else { | |
3332 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3333 | if (acl == NULL) | |
3334 | goto out; | |
3335 | acl->cached = 0; | |
3336 | } | |
3337 | acl->len = acl_len; | |
3338 | out: | |
3339 | nfs4_set_cached_acl(inode, acl); | |
3340 | } | |
3341 | ||
16b4289c | 3342 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3343 | { |
aa1870af BF |
3344 | struct page *pages[NFS4ACL_MAXPAGES]; |
3345 | struct nfs_getaclargs args = { | |
3346 | .fh = NFS_FH(inode), | |
3347 | .acl_pages = pages, | |
3348 | .acl_len = buflen, | |
3349 | }; | |
663c79b3 BH |
3350 | struct nfs_getaclres res = { |
3351 | .acl_len = buflen, | |
3352 | }; | |
e50a1c2e | 3353 | void *resp_buf; |
aa1870af BF |
3354 | struct rpc_message msg = { |
3355 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3356 | .rpc_argp = &args, | |
663c79b3 | 3357 | .rpc_resp = &res, |
aa1870af | 3358 | }; |
e50a1c2e | 3359 | struct page *localpage = NULL; |
aa1870af BF |
3360 | int ret; |
3361 | ||
e50a1c2e BF |
3362 | if (buflen < PAGE_SIZE) { |
3363 | /* As long as we're doing a round trip to the server anyway, | |
3364 | * let's be prepared for a page of acl data. */ | |
3365 | localpage = alloc_page(GFP_KERNEL); | |
3366 | resp_buf = page_address(localpage); | |
3367 | if (localpage == NULL) | |
3368 | return -ENOMEM; | |
3369 | args.acl_pages[0] = localpage; | |
3370 | args.acl_pgbase = 0; | |
663c79b3 | 3371 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3372 | } else { |
3373 | resp_buf = buf; | |
3374 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3375 | } | |
cccef3b9 | 3376 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3377 | if (ret) |
3378 | goto out_free; | |
663c79b3 BH |
3379 | if (res.acl_len > args.acl_len) |
3380 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3381 | else |
663c79b3 | 3382 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3383 | if (buf) { |
3384 | ret = -ERANGE; | |
663c79b3 | 3385 | if (res.acl_len > buflen) |
e50a1c2e BF |
3386 | goto out_free; |
3387 | if (localpage) | |
663c79b3 | 3388 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3389 | } |
663c79b3 | 3390 | ret = res.acl_len; |
e50a1c2e BF |
3391 | out_free: |
3392 | if (localpage) | |
3393 | __free_page(localpage); | |
aa1870af BF |
3394 | return ret; |
3395 | } | |
3396 | ||
16b4289c TM |
3397 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3398 | { | |
3399 | struct nfs4_exception exception = { }; | |
3400 | ssize_t ret; | |
3401 | do { | |
3402 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3403 | if (ret >= 0) | |
3404 | break; | |
3405 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3406 | } while (exception.retry); | |
3407 | return ret; | |
3408 | } | |
3409 | ||
e50a1c2e BF |
3410 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3411 | { | |
3412 | struct nfs_server *server = NFS_SERVER(inode); | |
3413 | int ret; | |
3414 | ||
3415 | if (!nfs4_server_supports_acls(server)) | |
3416 | return -EOPNOTSUPP; | |
3417 | ret = nfs_revalidate_inode(server, inode); | |
3418 | if (ret < 0) | |
3419 | return ret; | |
3420 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3421 | if (ret != -ENOENT) | |
3422 | return ret; | |
3423 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3424 | } | |
3425 | ||
16b4289c | 3426 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3427 | { |
3428 | struct nfs_server *server = NFS_SERVER(inode); | |
3429 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3430 | struct nfs_setaclargs arg = { | |
3431 | .fh = NFS_FH(inode), | |
3432 | .acl_pages = pages, | |
3433 | .acl_len = buflen, | |
3434 | }; | |
73c403a9 | 3435 | struct nfs_setaclres res; |
4b580ee3 BF |
3436 | struct rpc_message msg = { |
3437 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3438 | .rpc_argp = &arg, | |
73c403a9 | 3439 | .rpc_resp = &res, |
4b580ee3 BF |
3440 | }; |
3441 | int ret; | |
3442 | ||
3443 | if (!nfs4_server_supports_acls(server)) | |
3444 | return -EOPNOTSUPP; | |
642ac549 | 3445 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3446 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3447 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3448 | nfs_access_zap_cache(inode); |
3449 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3450 | return ret; |
3451 | } | |
3452 | ||
16b4289c TM |
3453 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3454 | { | |
3455 | struct nfs4_exception exception = { }; | |
3456 | int err; | |
3457 | do { | |
3458 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3459 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3460 | &exception); | |
3461 | } while (exception.retry); | |
3462 | return err; | |
3463 | } | |
3464 | ||
1da177e4 | 3465 | static int |
aa5190d0 | 3466 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 3467 | { |
aa5190d0 TM |
3468 | struct nfs_client *clp = server->nfs_client; |
3469 | ||
3470 | if (task->tk_status >= 0) | |
1da177e4 LT |
3471 | return 0; |
3472 | switch(task->tk_status) { | |
9e33bed5 TM |
3473 | case -NFS4ERR_ADMIN_REVOKED: |
3474 | case -NFS4ERR_BAD_STATEID: | |
3475 | case -NFS4ERR_OPENMODE: | |
3476 | if (state == NULL) | |
3477 | break; | |
3478 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 3479 | goto do_state_recovery; |
1da177e4 | 3480 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
3481 | if (state == NULL) |
3482 | break; | |
3483 | nfs4_state_mark_reclaim_reboot(clp, state); | |
3484 | case -NFS4ERR_STALE_CLIENTID: | |
1da177e4 | 3485 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 3486 | goto do_state_recovery; |
4745e315 AA |
3487 | #if defined(CONFIG_NFS_V4_1) |
3488 | case -NFS4ERR_BADSESSION: | |
3489 | case -NFS4ERR_BADSLOT: | |
3490 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3491 | case -NFS4ERR_DEADSESSION: | |
3492 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3493 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3494 | case -NFS4ERR_SEQ_MISORDERED: | |
3495 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3496 | task->tk_status); | |
0b9e2d41 | 3497 | nfs4_schedule_state_recovery(clp); |
4745e315 AA |
3498 | task->tk_status = 0; |
3499 | return -EAGAIN; | |
3500 | #endif /* CONFIG_NFS_V4_1 */ | |
1da177e4 | 3501 | case -NFS4ERR_DELAY: |
aa5190d0 | 3502 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 3503 | case -NFS4ERR_GRACE: |
2c643488 | 3504 | case -EKEYEXPIRED: |
1da177e4 LT |
3505 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3506 | task->tk_status = 0; | |
3507 | return -EAGAIN; | |
3508 | case -NFS4ERR_OLD_STATEID: | |
3509 | task->tk_status = 0; | |
3510 | return -EAGAIN; | |
3511 | } | |
3512 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3513 | return 0; | |
a2c0b9e2 TM |
3514 | do_state_recovery: |
3515 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3516 | nfs4_schedule_state_recovery(clp); | |
3517 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3518 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3519 | task->tk_status = 0; | |
3520 | return -EAGAIN; | |
1da177e4 LT |
3521 | } |
3522 | ||
bb8b27e5 TM |
3523 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
3524 | unsigned short port, struct rpc_cred *cred, | |
3525 | struct nfs4_setclientid_res *res) | |
1da177e4 LT |
3526 | { |
3527 | nfs4_verifier sc_verifier; | |
3528 | struct nfs4_setclientid setclientid = { | |
3529 | .sc_verifier = &sc_verifier, | |
3530 | .sc_prog = program, | |
3531 | }; | |
3532 | struct rpc_message msg = { | |
3533 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3534 | .rpc_argp = &setclientid, | |
bb8b27e5 | 3535 | .rpc_resp = res, |
286d7d6a | 3536 | .rpc_cred = cred, |
1da177e4 | 3537 | }; |
bc4785cd | 3538 | __be32 *p; |
1da177e4 LT |
3539 | int loop = 0; |
3540 | int status; | |
3541 | ||
bc4785cd | 3542 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3543 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3544 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3545 | ||
3546 | for(;;) { | |
3547 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3548 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3549 | clp->cl_ipaddr, |
3550 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3551 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3552 | rpc_peeraddr2str(clp->cl_rpcclient, |
3553 | RPC_DISPLAY_PROTO), | |
78ea323b | 3554 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3555 | clp->cl_id_uniquifier); |
3556 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3557 | sizeof(setclientid.sc_netid), |
3558 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3559 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3560 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3561 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3562 | clp->cl_ipaddr, port >> 8, port & 255); |
3563 | ||
3564 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3565 | if (status != -NFS4ERR_CLID_INUSE) | |
3566 | break; | |
3567 | if (signalled()) | |
3568 | break; | |
3569 | if (loop++ & 1) | |
3570 | ssleep(clp->cl_lease_time + 1); | |
3571 | else | |
3572 | if (++clp->cl_id_uniquifier == 0) | |
3573 | break; | |
3574 | } | |
3575 | return status; | |
3576 | } | |
3577 | ||
bb8b27e5 TM |
3578 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3579 | struct nfs4_setclientid_res *arg, | |
3580 | struct rpc_cred *cred) | |
1da177e4 LT |
3581 | { |
3582 | struct nfs_fsinfo fsinfo; | |
3583 | struct rpc_message msg = { | |
3584 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
bb8b27e5 | 3585 | .rpc_argp = arg, |
1da177e4 | 3586 | .rpc_resp = &fsinfo, |
286d7d6a | 3587 | .rpc_cred = cred, |
1da177e4 LT |
3588 | }; |
3589 | unsigned long now; | |
3590 | int status; | |
3591 | ||
3592 | now = jiffies; | |
3593 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3594 | if (status == 0) { | |
3595 | spin_lock(&clp->cl_lock); | |
3596 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3597 | clp->cl_last_renewal = now; | |
3598 | spin_unlock(&clp->cl_lock); | |
3599 | } | |
3600 | return status; | |
3601 | } | |
3602 | ||
bb8b27e5 TM |
3603 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3604 | struct nfs4_setclientid_res *arg, | |
3605 | struct rpc_cred *cred) | |
51581f3b | 3606 | { |
77e03677 | 3607 | long timeout = 0; |
51581f3b TM |
3608 | int err; |
3609 | do { | |
bb8b27e5 | 3610 | err = _nfs4_proc_setclientid_confirm(clp, arg, cred); |
51581f3b TM |
3611 | switch (err) { |
3612 | case 0: | |
3613 | return err; | |
3614 | case -NFS4ERR_RESOURCE: | |
3615 | /* The IBM lawyers misread another document! */ | |
3616 | case -NFS4ERR_DELAY: | |
2c643488 | 3617 | case -EKEYEXPIRED: |
51581f3b TM |
3618 | err = nfs4_delay(clp->cl_rpcclient, &timeout); |
3619 | } | |
3620 | } while (err == 0); | |
3621 | return err; | |
3622 | } | |
3623 | ||
fe650407 TM |
3624 | struct nfs4_delegreturndata { |
3625 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3626 | struct nfs4_delegreturnres res; |
fe650407 TM |
3627 | struct nfs_fh fh; |
3628 | nfs4_stateid stateid; | |
26e976a8 | 3629 | unsigned long timestamp; |
fa178f29 | 3630 | struct nfs_fattr fattr; |
fe650407 TM |
3631 | int rpc_status; |
3632 | }; | |
3633 | ||
fe650407 TM |
3634 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3635 | { | |
3636 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 | 3637 | |
d61e612a TM |
3638 | nfs4_sequence_done(data->res.server, &data->res.seq_res, |
3639 | task->tk_status); | |
938e1010 | 3640 | |
79708861 RL |
3641 | switch (task->tk_status) { |
3642 | case -NFS4ERR_STALE_STATEID: | |
3643 | case -NFS4ERR_EXPIRED: | |
3644 | case 0: | |
fa178f29 | 3645 | renew_lease(data->res.server, data->timestamp); |
79708861 RL |
3646 | break; |
3647 | default: | |
3648 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
3649 | -EAGAIN) { | |
3650 | nfs_restart_rpc(task, data->res.server->nfs_client); | |
3651 | return; | |
3652 | } | |
3653 | } | |
3654 | data->rpc_status = task->tk_status; | |
fe650407 TM |
3655 | } |
3656 | ||
3657 | static void nfs4_delegreturn_release(void *calldata) | |
3658 | { | |
fe650407 TM |
3659 | kfree(calldata); |
3660 | } | |
3661 | ||
938e1010 AA |
3662 | #if defined(CONFIG_NFS_V4_1) |
3663 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3664 | { | |
3665 | struct nfs4_delegreturndata *d_data; | |
3666 | ||
3667 | d_data = (struct nfs4_delegreturndata *)data; | |
3668 | ||
035168ab | 3669 | if (nfs4_setup_sequence(d_data->res.server, |
938e1010 AA |
3670 | &d_data->args.seq_args, |
3671 | &d_data->res.seq_res, 1, task)) | |
3672 | return; | |
3673 | rpc_call_start(task); | |
3674 | } | |
3675 | #endif /* CONFIG_NFS_V4_1 */ | |
3676 | ||
c8d149f3 | 3677 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3678 | #if defined(CONFIG_NFS_V4_1) |
3679 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3680 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3681 | .rpc_call_done = nfs4_delegreturn_done, |
3682 | .rpc_release = nfs4_delegreturn_release, | |
3683 | }; | |
3684 | ||
e6f81075 | 3685 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3686 | { |
3687 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3688 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3689 | struct rpc_task *task; |
5138fde0 TM |
3690 | struct rpc_message msg = { |
3691 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3692 | .rpc_cred = cred, | |
3693 | }; | |
c970aa85 TM |
3694 | struct rpc_task_setup task_setup_data = { |
3695 | .rpc_client = server->client, | |
5138fde0 | 3696 | .rpc_message = &msg, |
c970aa85 TM |
3697 | .callback_ops = &nfs4_delegreturn_ops, |
3698 | .flags = RPC_TASK_ASYNC, | |
3699 | }; | |
e6f81075 | 3700 | int status = 0; |
fe650407 | 3701 | |
8535b2be | 3702 | data = kzalloc(sizeof(*data), GFP_NOFS); |
fe650407 TM |
3703 | if (data == NULL) |
3704 | return -ENOMEM; | |
3705 | data->args.fhandle = &data->fh; | |
3706 | data->args.stateid = &data->stateid; | |
fa178f29 | 3707 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3708 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3709 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3710 | data->res.fattr = &data->fattr; |
3711 | data->res.server = server; | |
5f7dbd5c | 3712 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3713 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3714 | data->timestamp = jiffies; |
fe650407 TM |
3715 | data->rpc_status = 0; |
3716 | ||
c970aa85 | 3717 | task_setup_data.callback_data = data; |
5138fde0 TM |
3718 | msg.rpc_argp = &data->args, |
3719 | msg.rpc_resp = &data->res, | |
c970aa85 | 3720 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3721 | if (IS_ERR(task)) |
fe650407 | 3722 | return PTR_ERR(task); |
e6f81075 TM |
3723 | if (!issync) |
3724 | goto out; | |
fe650407 | 3725 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3726 | if (status != 0) |
3727 | goto out; | |
3728 | status = data->rpc_status; | |
3729 | if (status != 0) | |
3730 | goto out; | |
3731 | nfs_refresh_inode(inode, &data->fattr); | |
3732 | out: | |
e6b3c4db | 3733 | rpc_put_task(task); |
fe650407 | 3734 | return status; |
1da177e4 LT |
3735 | } |
3736 | ||
e6f81075 | 3737 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3738 | { |
3739 | struct nfs_server *server = NFS_SERVER(inode); | |
3740 | struct nfs4_exception exception = { }; | |
3741 | int err; | |
3742 | do { | |
e6f81075 | 3743 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3744 | switch (err) { |
3745 | case -NFS4ERR_STALE_STATEID: | |
3746 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3747 | case 0: |
3748 | return 0; | |
3749 | } | |
3750 | err = nfs4_handle_exception(server, err, &exception); | |
3751 | } while (exception.retry); | |
3752 | return err; | |
3753 | } | |
3754 | ||
3755 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3756 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3757 | ||
3758 | /* | |
3759 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3760 | */ | |
3761 | static unsigned long | |
3762 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3763 | { | |
150030b7 | 3764 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3765 | timeout <<= 1; |
3766 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3767 | return NFS4_LOCK_MAXTIMEOUT; | |
3768 | return timeout; | |
3769 | } | |
3770 | ||
1da177e4 LT |
3771 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3772 | { | |
3773 | struct inode *inode = state->inode; | |
3774 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3775 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3776 | struct nfs_lockt_args arg = { |
1da177e4 | 3777 | .fh = NFS_FH(inode), |
911d1aaf | 3778 | .fl = request, |
1da177e4 | 3779 | }; |
911d1aaf TM |
3780 | struct nfs_lockt_res res = { |
3781 | .denied = request, | |
1da177e4 LT |
3782 | }; |
3783 | struct rpc_message msg = { | |
3784 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3785 | .rpc_argp = &arg, | |
3786 | .rpc_resp = &res, | |
3787 | .rpc_cred = state->owner->so_cred, | |
3788 | }; | |
1da177e4 LT |
3789 | struct nfs4_lock_state *lsp; |
3790 | int status; | |
3791 | ||
911d1aaf | 3792 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3793 | status = nfs4_set_lock_state(state, request); |
3794 | if (status != 0) | |
3795 | goto out; | |
3796 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3797 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3798 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3799 | switch (status) { |
3800 | case 0: | |
3801 | request->fl_type = F_UNLCK; | |
3802 | break; | |
3803 | case -NFS4ERR_DENIED: | |
3804 | status = 0; | |
1da177e4 | 3805 | } |
70cc6487 | 3806 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3807 | out: |
1da177e4 LT |
3808 | return status; |
3809 | } | |
3810 | ||
3811 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3812 | { | |
3813 | struct nfs4_exception exception = { }; | |
3814 | int err; | |
3815 | ||
3816 | do { | |
3817 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3818 | _nfs4_proc_getlk(state, cmd, request), | |
3819 | &exception); | |
3820 | } while (exception.retry); | |
3821 | return err; | |
3822 | } | |
3823 | ||
3824 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3825 | { | |
3826 | int res = 0; | |
3827 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3828 | case FL_POSIX: | |
3829 | res = posix_lock_file_wait(file, fl); | |
3830 | break; | |
3831 | case FL_FLOCK: | |
3832 | res = flock_lock_file_wait(file, fl); | |
3833 | break; | |
3834 | default: | |
3835 | BUG(); | |
3836 | } | |
1da177e4 LT |
3837 | return res; |
3838 | } | |
3839 | ||
faf5f49c | 3840 | struct nfs4_unlockdata { |
911d1aaf TM |
3841 | struct nfs_locku_args arg; |
3842 | struct nfs_locku_res res; | |
faf5f49c TM |
3843 | struct nfs4_lock_state *lsp; |
3844 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3845 | struct file_lock fl; |
3846 | const struct nfs_server *server; | |
26e976a8 | 3847 | unsigned long timestamp; |
faf5f49c TM |
3848 | }; |
3849 | ||
911d1aaf TM |
3850 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3851 | struct nfs_open_context *ctx, | |
3852 | struct nfs4_lock_state *lsp, | |
3853 | struct nfs_seqid *seqid) | |
3854 | { | |
3855 | struct nfs4_unlockdata *p; | |
3856 | struct inode *inode = lsp->ls_state->inode; | |
3857 | ||
8535b2be | 3858 | p = kzalloc(sizeof(*p), GFP_NOFS); |
911d1aaf TM |
3859 | if (p == NULL) |
3860 | return NULL; | |
3861 | p->arg.fh = NFS_FH(inode); | |
3862 | p->arg.fl = &p->fl; | |
3863 | p->arg.seqid = seqid; | |
c1d51931 | 3864 | p->res.seqid = seqid; |
5f7dbd5c | 3865 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3866 | p->arg.stateid = &lsp->ls_stateid; |
3867 | p->lsp = lsp; | |
3868 | atomic_inc(&lsp->ls_count); | |
3869 | /* Ensure we don't close file until we're done freeing locks! */ | |
3870 | p->ctx = get_nfs_open_context(ctx); | |
3871 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3872 | p->server = NFS_SERVER(inode); | |
3873 | return p; | |
3874 | } | |
3875 | ||
06f814a3 | 3876 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3877 | { |
963d8fe5 | 3878 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3879 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3880 | nfs4_put_lock_state(calldata->lsp); |
3881 | put_nfs_open_context(calldata->ctx); | |
3882 | kfree(calldata); | |
faf5f49c TM |
3883 | } |
3884 | ||
963d8fe5 | 3885 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3886 | { |
963d8fe5 | 3887 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3888 | |
a893693c AA |
3889 | nfs4_sequence_done(calldata->server, &calldata->res.seq_res, |
3890 | task->tk_status); | |
06f814a3 TM |
3891 | if (RPC_ASSASSINATED(task)) |
3892 | return; | |
faf5f49c TM |
3893 | switch (task->tk_status) { |
3894 | case 0: | |
3895 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3896 | calldata->res.stateid.data, |
faf5f49c | 3897 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3898 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3899 | break; |
9e33bed5 TM |
3900 | case -NFS4ERR_BAD_STATEID: |
3901 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3902 | case -NFS4ERR_STALE_STATEID: |
3903 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3904 | break; |
3905 | default: | |
9e33bed5 | 3906 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
0110ee15 | 3907 | nfs_restart_rpc(task, |
d61e612a | 3908 | calldata->server->nfs_client); |
faf5f49c | 3909 | } |
faf5f49c TM |
3910 | } |
3911 | ||
4ce70ada | 3912 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3913 | { |
4ce70ada | 3914 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3915 | |
911d1aaf | 3916 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3917 | return; |
3918 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3919 | /* Note: exit _without_ running nfs4_locku_done */ |
3920 | task->tk_action = NULL; | |
faf5f49c TM |
3921 | return; |
3922 | } | |
26e976a8 | 3923 | calldata->timestamp = jiffies; |
035168ab | 3924 | if (nfs4_setup_sequence(calldata->server, |
a893693c AA |
3925 | &calldata->arg.seq_args, |
3926 | &calldata->res.seq_res, 1, task)) | |
3927 | return; | |
5138fde0 | 3928 | rpc_call_start(task); |
faf5f49c TM |
3929 | } |
3930 | ||
963d8fe5 | 3931 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3932 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3933 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3934 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3935 | }; |
3936 | ||
a5d16a4d TM |
3937 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3938 | struct nfs_open_context *ctx, | |
3939 | struct nfs4_lock_state *lsp, | |
3940 | struct nfs_seqid *seqid) | |
3941 | { | |
3942 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3943 | struct rpc_message msg = { |
3944 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3945 | .rpc_cred = ctx->cred, | |
3946 | }; | |
c970aa85 TM |
3947 | struct rpc_task_setup task_setup_data = { |
3948 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3949 | .rpc_message = &msg, |
c970aa85 | 3950 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3951 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3952 | .flags = RPC_TASK_ASYNC, |
3953 | }; | |
a5d16a4d | 3954 | |
137d6aca FF |
3955 | /* Ensure this is an unlock - when canceling a lock, the |
3956 | * canceled lock is passed in, and it won't be an unlock. | |
3957 | */ | |
3958 | fl->fl_type = F_UNLCK; | |
3959 | ||
a5d16a4d TM |
3960 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3961 | if (data == NULL) { | |
3962 | nfs_free_seqid(seqid); | |
3963 | return ERR_PTR(-ENOMEM); | |
3964 | } | |
3965 | ||
5138fde0 TM |
3966 | msg.rpc_argp = &data->arg, |
3967 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3968 | task_setup_data.callback_data = data; |
3969 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3970 | } |
3971 | ||
faf5f49c TM |
3972 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3973 | { | |
19e03c57 | 3974 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3975 | struct nfs_seqid *seqid; |
1da177e4 | 3976 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3977 | struct rpc_task *task; |
3978 | int status = 0; | |
536ff0f8 | 3979 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3980 | |
8d0a8a9d | 3981 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3982 | /* Unlock _before_ we do the RPC call */ |
3983 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3984 | down_read(&nfsi->rwsem); |
3985 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3986 | up_read(&nfsi->rwsem); | |
9b073574 | 3987 | goto out; |
19e03c57 TM |
3988 | } |
3989 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3990 | if (status != 0) |
9b073574 TM |
3991 | goto out; |
3992 | /* Is this a delegated lock? */ | |
3993 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3994 | goto out; | |
8d0a8a9d | 3995 | lsp = request->fl_u.nfs4_fl.owner; |
8535b2be | 3996 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
9b073574 | 3997 | status = -ENOMEM; |
911d1aaf | 3998 | if (seqid == NULL) |
9b073574 | 3999 | goto out; |
cd3758e3 | 4000 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
4001 | status = PTR_ERR(task); |
4002 | if (IS_ERR(task)) | |
9b073574 | 4003 | goto out; |
a5d16a4d | 4004 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 4005 | rpc_put_task(task); |
9b073574 | 4006 | out: |
536ff0f8 | 4007 | request->fl_flags = fl_flags; |
1da177e4 LT |
4008 | return status; |
4009 | } | |
4010 | ||
a5d16a4d TM |
4011 | struct nfs4_lockdata { |
4012 | struct nfs_lock_args arg; | |
4013 | struct nfs_lock_res res; | |
4014 | struct nfs4_lock_state *lsp; | |
4015 | struct nfs_open_context *ctx; | |
4016 | struct file_lock fl; | |
26e976a8 | 4017 | unsigned long timestamp; |
a5d16a4d TM |
4018 | int rpc_status; |
4019 | int cancelled; | |
66179efe | 4020 | struct nfs_server *server; |
a5d16a4d TM |
4021 | }; |
4022 | ||
4023 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
8535b2be TM |
4024 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
4025 | gfp_t gfp_mask) | |
1da177e4 | 4026 | { |
a5d16a4d TM |
4027 | struct nfs4_lockdata *p; |
4028 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 4029 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d | 4030 | |
8535b2be | 4031 | p = kzalloc(sizeof(*p), gfp_mask); |
a5d16a4d TM |
4032 | if (p == NULL) |
4033 | return NULL; | |
4034 | ||
4035 | p->arg.fh = NFS_FH(inode); | |
4036 | p->arg.fl = &p->fl; | |
8535b2be | 4037 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
2f74c0a0 TM |
4038 | if (p->arg.open_seqid == NULL) |
4039 | goto out_free; | |
8535b2be | 4040 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
a5d16a4d | 4041 | if (p->arg.lock_seqid == NULL) |
2f74c0a0 | 4042 | goto out_free_seqid; |
a5d16a4d | 4043 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 4044 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 4045 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 4046 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 4047 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d | 4048 | p->lsp = lsp; |
66179efe | 4049 | p->server = server; |
a5d16a4d TM |
4050 | atomic_inc(&lsp->ls_count); |
4051 | p->ctx = get_nfs_open_context(ctx); | |
4052 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4053 | return p; | |
2f74c0a0 TM |
4054 | out_free_seqid: |
4055 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
4056 | out_free: |
4057 | kfree(p); | |
4058 | return NULL; | |
4059 | } | |
4060 | ||
4061 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
4062 | { | |
4063 | struct nfs4_lockdata *data = calldata; | |
4064 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 4065 | |
3110ff80 | 4066 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
4067 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
4068 | return; | |
a5d16a4d TM |
4069 | /* Do we need to do an open_to_lock_owner? */ |
4070 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
4071 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
4072 | return; | |
a5d16a4d TM |
4073 | data->arg.open_stateid = &state->stateid; |
4074 | data->arg.new_lock_owner = 1; | |
c1d51931 | 4075 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
4076 | } else |
4077 | data->arg.new_lock_owner = 0; | |
26e976a8 | 4078 | data->timestamp = jiffies; |
035168ab TM |
4079 | if (nfs4_setup_sequence(data->server, |
4080 | &data->arg.seq_args, | |
66179efe AA |
4081 | &data->res.seq_res, 1, task)) |
4082 | return; | |
5138fde0 | 4083 | rpc_call_start(task); |
3110ff80 | 4084 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
4085 | } |
4086 | ||
b257957e AB |
4087 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
4088 | { | |
4089 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
4090 | nfs4_lock_prepare(task, calldata); | |
4091 | } | |
4092 | ||
a5d16a4d TM |
4093 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
4094 | { | |
4095 | struct nfs4_lockdata *data = calldata; | |
4096 | ||
3110ff80 | 4097 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 4098 | |
d61e612a TM |
4099 | nfs4_sequence_done(data->server, &data->res.seq_res, |
4100 | task->tk_status); | |
66179efe | 4101 | |
a5d16a4d TM |
4102 | data->rpc_status = task->tk_status; |
4103 | if (RPC_ASSASSINATED(task)) | |
4104 | goto out; | |
4105 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
4106 | if (data->rpc_status == 0) |
4107 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4108 | else | |
4109 | goto out; | |
4110 | } | |
4111 | if (data->rpc_status == 0) { | |
4112 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
4113 | sizeof(data->lsp->ls_stateid.data)); | |
4114 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 4115 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 4116 | } |
a5d16a4d | 4117 | out: |
3110ff80 | 4118 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
4119 | } |
4120 | ||
4121 | static void nfs4_lock_release(void *calldata) | |
4122 | { | |
4123 | struct nfs4_lockdata *data = calldata; | |
4124 | ||
3110ff80 | 4125 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 4126 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
4127 | if (data->cancelled != 0) { |
4128 | struct rpc_task *task; | |
4129 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4130 | data->arg.lock_seqid); | |
4131 | if (!IS_ERR(task)) | |
e6b3c4db | 4132 | rpc_put_task(task); |
3110ff80 | 4133 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
4134 | } else |
4135 | nfs_free_seqid(data->arg.lock_seqid); | |
4136 | nfs4_put_lock_state(data->lsp); | |
4137 | put_nfs_open_context(data->ctx); | |
4138 | kfree(data); | |
3110ff80 | 4139 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
4140 | } |
4141 | ||
4142 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4143 | .rpc_call_prepare = nfs4_lock_prepare, | |
4144 | .rpc_call_done = nfs4_lock_done, | |
4145 | .rpc_release = nfs4_lock_release, | |
4146 | }; | |
4147 | ||
b257957e AB |
4148 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
4149 | .rpc_call_prepare = nfs4_recover_lock_prepare, | |
4150 | .rpc_call_done = nfs4_lock_done, | |
4151 | .rpc_release = nfs4_lock_release, | |
4152 | }; | |
4153 | ||
2bee72a6 TM |
4154 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
4155 | { | |
4156 | struct nfs_client *clp = server->nfs_client; | |
4157 | struct nfs4_state *state = lsp->ls_state; | |
4158 | ||
4159 | switch (error) { | |
4160 | case -NFS4ERR_ADMIN_REVOKED: | |
4161 | case -NFS4ERR_BAD_STATEID: | |
4162 | case -NFS4ERR_EXPIRED: | |
4163 | if (new_lock_owner != 0 || | |
4164 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4165 | nfs4_state_mark_reclaim_nograce(clp, state); | |
4166 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
a2c0b9e2 TM |
4167 | break; |
4168 | case -NFS4ERR_STALE_STATEID: | |
4169 | if (new_lock_owner != 0 || | |
4170 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4171 | nfs4_state_mark_reclaim_reboot(clp, state); | |
4172 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
2bee72a6 TM |
4173 | }; |
4174 | } | |
4175 | ||
afe6c27c | 4176 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
a5d16a4d TM |
4177 | { |
4178 | struct nfs4_lockdata *data; | |
4179 | struct rpc_task *task; | |
5138fde0 TM |
4180 | struct rpc_message msg = { |
4181 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4182 | .rpc_cred = state->owner->so_cred, | |
4183 | }; | |
c970aa85 TM |
4184 | struct rpc_task_setup task_setup_data = { |
4185 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 4186 | .rpc_message = &msg, |
c970aa85 | 4187 | .callback_ops = &nfs4_lock_ops, |
101070ca | 4188 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
4189 | .flags = RPC_TASK_ASYNC, |
4190 | }; | |
a5d16a4d TM |
4191 | int ret; |
4192 | ||
3110ff80 | 4193 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 4194 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
8535b2be TM |
4195 | fl->fl_u.nfs4_fl.owner, |
4196 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); | |
a5d16a4d TM |
4197 | if (data == NULL) |
4198 | return -ENOMEM; | |
4199 | if (IS_SETLKW(cmd)) | |
4200 | data->arg.block = 1; | |
b257957e AB |
4201 | if (recovery_type > NFS_LOCK_NEW) { |
4202 | if (recovery_type == NFS_LOCK_RECLAIM) | |
afe6c27c | 4203 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
b257957e AB |
4204 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
4205 | } | |
5138fde0 TM |
4206 | msg.rpc_argp = &data->arg, |
4207 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
4208 | task_setup_data.callback_data = data; |
4209 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 4210 | if (IS_ERR(task)) |
a5d16a4d | 4211 | return PTR_ERR(task); |
a5d16a4d TM |
4212 | ret = nfs4_wait_for_completion_rpc_task(task); |
4213 | if (ret == 0) { | |
4214 | ret = data->rpc_status; | |
2bee72a6 TM |
4215 | if (ret) |
4216 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4217 | data->arg.new_lock_owner, ret); | |
a5d16a4d TM |
4218 | } else |
4219 | data->cancelled = 1; | |
e6b3c4db | 4220 | rpc_put_task(task); |
3110ff80 | 4221 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 4222 | return ret; |
1da177e4 LT |
4223 | } |
4224 | ||
4225 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4226 | { | |
202b50dc TM |
4227 | struct nfs_server *server = NFS_SERVER(state->inode); |
4228 | struct nfs4_exception exception = { }; | |
4229 | int err; | |
4230 | ||
4231 | do { | |
42a2d13e TM |
4232 | /* Cache the lock if possible... */ |
4233 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4234 | return 0; | |
afe6c27c | 4235 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
2c643488 | 4236 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
4237 | break; |
4238 | nfs4_handle_exception(server, err, &exception); | |
4239 | } while (exception.retry); | |
4240 | return err; | |
1da177e4 LT |
4241 | } |
4242 | ||
4243 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4244 | { | |
202b50dc TM |
4245 | struct nfs_server *server = NFS_SERVER(state->inode); |
4246 | struct nfs4_exception exception = { }; | |
4247 | int err; | |
4248 | ||
6bfc93ef TM |
4249 | err = nfs4_set_lock_state(state, request); |
4250 | if (err != 0) | |
4251 | return err; | |
202b50dc | 4252 | do { |
42a2d13e TM |
4253 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
4254 | return 0; | |
afe6c27c | 4255 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
a9ed2e25 TM |
4256 | switch (err) { |
4257 | default: | |
4258 | goto out; | |
4259 | case -NFS4ERR_GRACE: | |
4260 | case -NFS4ERR_DELAY: | |
2c643488 | 4261 | case -EKEYEXPIRED: |
a9ed2e25 TM |
4262 | nfs4_handle_exception(server, err, &exception); |
4263 | err = 0; | |
4264 | } | |
202b50dc | 4265 | } while (exception.retry); |
a9ed2e25 | 4266 | out: |
202b50dc | 4267 | return err; |
1da177e4 LT |
4268 | } |
4269 | ||
4270 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4271 | { | |
19e03c57 | 4272 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 4273 | unsigned char fl_flags = request->fl_flags; |
8e469ebd | 4274 | int status = -ENOLCK; |
1da177e4 | 4275 | |
8e469ebd TM |
4276 | if ((fl_flags & FL_POSIX) && |
4277 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4278 | goto out; | |
6bfc93ef | 4279 | /* Is this a delegated open? */ |
6bfc93ef TM |
4280 | status = nfs4_set_lock_state(state, request); |
4281 | if (status != 0) | |
4282 | goto out; | |
01c3b861 TM |
4283 | request->fl_flags |= FL_ACCESS; |
4284 | status = do_vfs_lock(request->fl_file, request); | |
4285 | if (status < 0) | |
4286 | goto out; | |
19e03c57 | 4287 | down_read(&nfsi->rwsem); |
01c3b861 | 4288 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 4289 | /* Yes: cache locks! */ |
01c3b861 | 4290 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
4291 | request->fl_flags = fl_flags & ~FL_SLEEP; |
4292 | status = do_vfs_lock(request->fl_file, request); | |
4293 | goto out_unlock; | |
01c3b861 | 4294 | } |
afe6c27c | 4295 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
6bfc93ef | 4296 | if (status != 0) |
01c3b861 | 4297 | goto out_unlock; |
6bfc93ef | 4298 | /* Note: we always want to sleep here! */ |
01c3b861 | 4299 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 4300 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 4301 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 4302 | out_unlock: |
19e03c57 | 4303 | up_read(&nfsi->rwsem); |
01c3b861 TM |
4304 | out: |
4305 | request->fl_flags = fl_flags; | |
1da177e4 LT |
4306 | return status; |
4307 | } | |
4308 | ||
4309 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4310 | { | |
4311 | struct nfs4_exception exception = { }; | |
4312 | int err; | |
4313 | ||
4314 | do { | |
965b5d67 TM |
4315 | err = _nfs4_proc_setlk(state, cmd, request); |
4316 | if (err == -NFS4ERR_DENIED) | |
4317 | err = -EAGAIN; | |
1da177e4 | 4318 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
965b5d67 | 4319 | err, &exception); |
1da177e4 LT |
4320 | } while (exception.retry); |
4321 | return err; | |
4322 | } | |
4323 | ||
4324 | static int | |
4325 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4326 | { | |
4327 | struct nfs_open_context *ctx; | |
4328 | struct nfs4_state *state; | |
4329 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4330 | int status; | |
4331 | ||
4332 | /* verify open state */ | |
cd3758e3 | 4333 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4334 | state = ctx->state; |
4335 | ||
4336 | if (request->fl_start < 0 || request->fl_end < 0) | |
4337 | return -EINVAL; | |
4338 | ||
d953126a TM |
4339 | if (IS_GETLK(cmd)) { |
4340 | if (state != NULL) | |
4341 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4342 | return 0; | |
4343 | } | |
1da177e4 LT |
4344 | |
4345 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4346 | return -EINVAL; | |
4347 | ||
d953126a TM |
4348 | if (request->fl_type == F_UNLCK) { |
4349 | if (state != NULL) | |
4350 | return nfs4_proc_unlck(state, cmd, request); | |
4351 | return 0; | |
4352 | } | |
1da177e4 | 4353 | |
d953126a TM |
4354 | if (state == NULL) |
4355 | return -ENOLCK; | |
1da177e4 LT |
4356 | do { |
4357 | status = nfs4_proc_setlk(state, cmd, request); | |
4358 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4359 | break; | |
4360 | timeout = nfs4_set_lock_task_retry(timeout); | |
4361 | status = -ERESTARTSYS; | |
4362 | if (signalled()) | |
4363 | break; | |
4364 | } while(status < 0); | |
1da177e4 LT |
4365 | return status; |
4366 | } | |
4367 | ||
888e694c TM |
4368 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4369 | { | |
4370 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4371 | struct nfs4_exception exception = { }; | |
4372 | int err; | |
4373 | ||
4374 | err = nfs4_set_lock_state(state, fl); | |
4375 | if (err != 0) | |
4376 | goto out; | |
4377 | do { | |
afe6c27c | 4378 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
d5122201 TM |
4379 | switch (err) { |
4380 | default: | |
4381 | printk(KERN_ERR "%s: unhandled error %d.\n", | |
4382 | __func__, err); | |
4383 | case 0: | |
965b5d67 | 4384 | case -ESTALE: |
d5122201 TM |
4385 | goto out; |
4386 | case -NFS4ERR_EXPIRED: | |
4387 | case -NFS4ERR_STALE_CLIENTID: | |
965b5d67 | 4388 | case -NFS4ERR_STALE_STATEID: |
74e7bb73 RL |
4389 | case -NFS4ERR_BADSESSION: |
4390 | case -NFS4ERR_BADSLOT: | |
4391 | case -NFS4ERR_BAD_HIGH_SLOT: | |
4392 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
4393 | case -NFS4ERR_DEADSESSION: | |
d5122201 TM |
4394 | nfs4_schedule_state_recovery(server->nfs_client); |
4395 | goto out; | |
965b5d67 TM |
4396 | case -ERESTARTSYS: |
4397 | /* | |
4398 | * The show must go on: exit, but mark the | |
4399 | * stateid as needing recovery. | |
4400 | */ | |
4401 | case -NFS4ERR_ADMIN_REVOKED: | |
4402 | case -NFS4ERR_BAD_STATEID: | |
4403 | case -NFS4ERR_OPENMODE: | |
4404 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
4405 | err = 0; | |
4406 | goto out; | |
4407 | case -ENOMEM: | |
4408 | case -NFS4ERR_DENIED: | |
4409 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
4410 | err = 0; | |
4411 | goto out; | |
d5122201 | 4412 | case -NFS4ERR_DELAY: |
2c643488 | 4413 | case -EKEYEXPIRED: |
d5122201 TM |
4414 | break; |
4415 | } | |
888e694c TM |
4416 | err = nfs4_handle_exception(server, err, &exception); |
4417 | } while (exception.retry); | |
4418 | out: | |
4419 | return err; | |
4420 | } | |
6b3b5496 | 4421 | |
aa1870af BF |
4422 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4423 | ||
6b3b5496 BF |
4424 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4425 | size_t buflen, int flags) | |
4426 | { | |
4b580ee3 BF |
4427 | struct inode *inode = dentry->d_inode; |
4428 | ||
4429 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4430 | return -EOPNOTSUPP; | |
4431 | ||
4b580ee3 | 4432 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4433 | } |
4434 | ||
4435 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4436 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4437 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4438 | * attributes in kernel-managed attribute namespaces. */ | |
4439 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4440 | size_t buflen) | |
4441 | { | |
aa1870af BF |
4442 | struct inode *inode = dentry->d_inode; |
4443 | ||
4444 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4445 | return -EOPNOTSUPP; | |
4446 | ||
4447 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4448 | } |
4449 | ||
4450 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4451 | { | |
aa1870af | 4452 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4453 | |
096455a2 BF |
4454 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4455 | return 0; | |
6b3b5496 BF |
4456 | if (buf && buflen < len) |
4457 | return -ERANGE; | |
4458 | if (buf) | |
aa1870af BF |
4459 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4460 | return len; | |
6b3b5496 BF |
4461 | } |
4462 | ||
69aaaae1 TM |
4463 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4464 | { | |
4465 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4466 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4467 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4468 | return; | |
4469 | ||
4470 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4471 | NFS_ATTR_FATTR_NLINK; | |
4472 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4473 | fattr->nlink = 2; | |
4474 | } | |
4475 | ||
56659e99 | 4476 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4477 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4478 | { |
4479 | struct nfs_server *server = NFS_SERVER(dir); | |
4480 | u32 bitmask[2] = { | |
361e624f MN |
4481 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4482 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4483 | }; |
4484 | struct nfs4_fs_locations_arg args = { | |
4485 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4486 | .name = name, |
683b57b4 TM |
4487 | .page = page, |
4488 | .bitmask = bitmask, | |
4489 | }; | |
22958463 BH |
4490 | struct nfs4_fs_locations_res res = { |
4491 | .fs_locations = fs_locations, | |
4492 | }; | |
683b57b4 TM |
4493 | struct rpc_message msg = { |
4494 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4495 | .rpc_argp = &args, | |
22958463 | 4496 | .rpc_resp = &res, |
683b57b4 TM |
4497 | }; |
4498 | int status; | |
4499 | ||
3110ff80 | 4500 | dprintk("%s: start\n", __func__); |
c228fd3a | 4501 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4502 | fs_locations->server = server; |
830b8e33 | 4503 | fs_locations->nlocations = 0; |
cccef3b9 | 4504 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4505 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4506 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4507 | return status; |
4508 | } | |
4509 | ||
557134a3 | 4510 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4511 | /* |
4512 | * nfs4_proc_exchange_id() | |
4513 | * | |
4514 | * Since the clientid has expired, all compounds using sessions | |
4515 | * associated with the stale clientid will be returning | |
4516 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4517 | * be in some phase of session reset. | |
4518 | */ | |
4d643d1d | 4519 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
99fe60d0 BH |
4520 | { |
4521 | nfs4_verifier verifier; | |
4522 | struct nfs41_exchange_id_args args = { | |
4523 | .client = clp, | |
4524 | .flags = clp->cl_exchange_flags, | |
4525 | }; | |
4526 | struct nfs41_exchange_id_res res = { | |
4527 | .client = clp, | |
4528 | }; | |
4529 | int status; | |
4530 | struct rpc_message msg = { | |
4531 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4532 | .rpc_argp = &args, | |
4533 | .rpc_resp = &res, | |
4534 | .rpc_cred = cred, | |
4535 | }; | |
4536 | __be32 *p; | |
4537 | ||
4538 | dprintk("--> %s\n", __func__); | |
4539 | BUG_ON(clp == NULL); | |
a7b72103 | 4540 | |
7b183d0d AB |
4541 | /* Remove server-only flags */ |
4542 | args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; | |
4543 | ||
99fe60d0 BH |
4544 | p = (u32 *)verifier.data; |
4545 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4546 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4547 | args.verifier = &verifier; | |
4548 | ||
4549 | while (1) { | |
4550 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4551 | "%s/%s %u", | |
4552 | clp->cl_ipaddr, | |
4553 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4554 | RPC_DISPLAY_ADDR), | |
4555 | clp->cl_id_uniquifier); | |
4556 | ||
4557 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4558 | ||
180b62a3 | 4559 | if (status != -NFS4ERR_CLID_INUSE) |
99fe60d0 BH |
4560 | break; |
4561 | ||
4562 | if (signalled()) | |
4563 | break; | |
4564 | ||
4565 | if (++clp->cl_id_uniquifier == 0) | |
4566 | break; | |
4567 | } | |
4568 | ||
4569 | dprintk("<-- %s status= %d\n", __func__, status); | |
4570 | return status; | |
4571 | } | |
4572 | ||
2050f0cc AA |
4573 | struct nfs4_get_lease_time_data { |
4574 | struct nfs4_get_lease_time_args *args; | |
4575 | struct nfs4_get_lease_time_res *res; | |
4576 | struct nfs_client *clp; | |
4577 | }; | |
4578 | ||
4579 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4580 | void *calldata) | |
4581 | { | |
4582 | int ret; | |
4583 | struct nfs4_get_lease_time_data *data = | |
4584 | (struct nfs4_get_lease_time_data *)calldata; | |
4585 | ||
4586 | dprintk("--> %s\n", __func__); | |
689cf5c1 | 4587 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
2050f0cc AA |
4588 | /* just setup sequence, do not trigger session recovery |
4589 | since we're invoked within one */ | |
4590 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
689cf5c1 AB |
4591 | &data->args->la_seq_args, |
4592 | &data->res->lr_seq_res, 0, task); | |
2050f0cc AA |
4593 | |
4594 | BUG_ON(ret == -EAGAIN); | |
4595 | rpc_call_start(task); | |
4596 | dprintk("<-- %s\n", __func__); | |
4597 | } | |
4598 | ||
4599 | /* | |
4600 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4601 | * from sequence operation or clientid errors. | |
4602 | */ | |
4603 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4604 | { | |
4605 | struct nfs4_get_lease_time_data *data = | |
4606 | (struct nfs4_get_lease_time_data *)calldata; | |
4607 | ||
4608 | dprintk("--> %s\n", __func__); | |
d185a334 | 4609 | nfs41_sequence_done(&data->res->lr_seq_res); |
2050f0cc AA |
4610 | switch (task->tk_status) { |
4611 | case -NFS4ERR_DELAY: | |
4612 | case -NFS4ERR_GRACE: | |
2c643488 | 4613 | case -EKEYEXPIRED: |
2050f0cc AA |
4614 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
4615 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4616 | task->tk_status = 0; | |
0110ee15 | 4617 | nfs_restart_rpc(task, data->clp); |
2050f0cc AA |
4618 | return; |
4619 | } | |
2050f0cc AA |
4620 | dprintk("<-- %s\n", __func__); |
4621 | } | |
4622 | ||
4623 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4624 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4625 | .rpc_call_done = nfs4_get_lease_time_done, | |
4626 | }; | |
4627 | ||
4628 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4629 | { | |
4630 | struct rpc_task *task; | |
4631 | struct nfs4_get_lease_time_args args; | |
4632 | struct nfs4_get_lease_time_res res = { | |
4633 | .lr_fsinfo = fsinfo, | |
4634 | }; | |
4635 | struct nfs4_get_lease_time_data data = { | |
4636 | .args = &args, | |
4637 | .res = &res, | |
4638 | .clp = clp, | |
4639 | }; | |
4640 | struct rpc_message msg = { | |
4641 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4642 | .rpc_argp = &args, | |
4643 | .rpc_resp = &res, | |
4644 | }; | |
4645 | struct rpc_task_setup task_setup = { | |
4646 | .rpc_client = clp->cl_rpcclient, | |
4647 | .rpc_message = &msg, | |
4648 | .callback_ops = &nfs4_get_lease_time_ops, | |
4649 | .callback_data = &data | |
4650 | }; | |
4651 | int status; | |
4652 | ||
4653 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4654 | dprintk("--> %s\n", __func__); | |
4655 | task = rpc_run_task(&task_setup); | |
4656 | ||
4657 | if (IS_ERR(task)) | |
4658 | status = PTR_ERR(task); | |
4659 | else { | |
4660 | status = task->tk_status; | |
4661 | rpc_put_task(task); | |
4662 | } | |
4663 | dprintk("<-- %s return %d\n", __func__, status); | |
4664 | ||
4665 | return status; | |
4666 | } | |
4667 | ||
b73dafa7 RL |
4668 | /* |
4669 | * Reset a slot table | |
4670 | */ | |
104aeba4 AA |
4671 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
4672 | int ivalue) | |
ac72b7b3 | 4673 | { |
104aeba4 | 4674 | struct nfs4_slot *new = NULL; |
b73dafa7 | 4675 | int i; |
ac72b7b3 AA |
4676 | int ret = 0; |
4677 | ||
104aeba4 AA |
4678 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
4679 | max_reqs, tbl->max_slots); | |
ac72b7b3 | 4680 | |
104aeba4 AA |
4681 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
4682 | if (max_reqs != tbl->max_slots) { | |
4683 | ret = -ENOMEM; | |
4684 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), | |
8535b2be | 4685 | GFP_NOFS); |
104aeba4 AA |
4686 | if (!new) |
4687 | goto out; | |
4688 | ret = 0; | |
4689 | kfree(tbl->slots); | |
ac72b7b3 AA |
4690 | } |
4691 | spin_lock(&tbl->slot_tbl_lock); | |
104aeba4 AA |
4692 | if (new) { |
4693 | tbl->slots = new; | |
4694 | tbl->max_slots = max_reqs; | |
4695 | } | |
4696 | for (i = 0; i < tbl->max_slots; ++i) | |
b73dafa7 | 4697 | tbl->slots[i].seq_nr = ivalue; |
ac72b7b3 AA |
4698 | spin_unlock(&tbl->slot_tbl_lock); |
4699 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4700 | tbl, tbl->slots, tbl->max_slots); | |
4701 | out: | |
4702 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4703 | return ret; | |
4704 | } | |
4705 | ||
b73dafa7 RL |
4706 | /* |
4707 | * Reset the forechannel and backchannel slot tables | |
4708 | */ | |
4709 | static int nfs4_reset_slot_tables(struct nfs4_session *session) | |
4710 | { | |
4711 | int status; | |
4712 | ||
4713 | status = nfs4_reset_slot_table(&session->fc_slot_table, | |
104aeba4 | 4714 | session->fc_attrs.max_reqs, 1); |
f8625a6a RL |
4715 | if (status) |
4716 | return status; | |
4717 | ||
4718 | status = nfs4_reset_slot_table(&session->bc_slot_table, | |
104aeba4 | 4719 | session->bc_attrs.max_reqs, 0); |
b73dafa7 RL |
4720 | return status; |
4721 | } | |
4722 | ||
f8625a6a RL |
4723 | /* Destroy the slot table */ |
4724 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) | |
4725 | { | |
4726 | if (session->fc_slot_table.slots != NULL) { | |
4727 | kfree(session->fc_slot_table.slots); | |
4728 | session->fc_slot_table.slots = NULL; | |
4729 | } | |
4730 | if (session->bc_slot_table.slots != NULL) { | |
4731 | kfree(session->bc_slot_table.slots); | |
4732 | session->bc_slot_table.slots = NULL; | |
4733 | } | |
4734 | return; | |
4735 | } | |
4736 | ||
fc931582 AA |
4737 | /* |
4738 | * Initialize slot table | |
4739 | */ | |
050047ce RL |
4740 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
4741 | int max_slots, int ivalue) | |
fc931582 | 4742 | { |
fc931582 AA |
4743 | struct nfs4_slot *slot; |
4744 | int ret = -ENOMEM; | |
4745 | ||
4746 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4747 | ||
050047ce | 4748 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
fc931582 | 4749 | |
8535b2be | 4750 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); |
fc931582 AA |
4751 | if (!slot) |
4752 | goto out; | |
fc931582 AA |
4753 | ret = 0; |
4754 | ||
4755 | spin_lock(&tbl->slot_tbl_lock); | |
fc931582 AA |
4756 | tbl->max_slots = max_slots; |
4757 | tbl->slots = slot; | |
4758 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4759 | spin_unlock(&tbl->slot_tbl_lock); | |
4760 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4761 | tbl, tbl->slots, tbl->max_slots); | |
4762 | out: | |
4763 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4764 | return ret; | |
fc931582 AA |
4765 | } |
4766 | ||
050047ce RL |
4767 | /* |
4768 | * Initialize the forechannel and backchannel tables | |
4769 | */ | |
4770 | static int nfs4_init_slot_tables(struct nfs4_session *session) | |
4771 | { | |
f26468fb TM |
4772 | struct nfs4_slot_table *tbl; |
4773 | int status = 0; | |
050047ce | 4774 | |
f26468fb TM |
4775 | tbl = &session->fc_slot_table; |
4776 | if (tbl->slots == NULL) { | |
4777 | status = nfs4_init_slot_table(tbl, | |
4778 | session->fc_attrs.max_reqs, 1); | |
4779 | if (status) | |
4780 | return status; | |
4781 | } | |
050047ce | 4782 | |
f26468fb TM |
4783 | tbl = &session->bc_slot_table; |
4784 | if (tbl->slots == NULL) { | |
4785 | status = nfs4_init_slot_table(tbl, | |
4786 | session->bc_attrs.max_reqs, 0); | |
4787 | if (status) | |
4788 | nfs4_destroy_slot_tables(session); | |
4789 | } | |
f8625a6a RL |
4790 | |
4791 | return status; | |
557134a3 AA |
4792 | } |
4793 | ||
4794 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4795 | { | |
4796 | struct nfs4_session *session; | |
4797 | struct nfs4_slot_table *tbl; | |
4798 | ||
8535b2be | 4799 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
557134a3 AA |
4800 | if (!session) |
4801 | return NULL; | |
76db6d95 | 4802 | |
76db6d95 AA |
4803 | /* |
4804 | * The create session reply races with the server back | |
4805 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
4806 | * so that the client back channel can find the | |
4807 | * nfs_client struct | |
4808 | */ | |
4809 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
ea028ac9 | 4810 | init_completion(&session->complete); |
76db6d95 | 4811 | |
557134a3 | 4812 | tbl = &session->fc_slot_table; |
9dfdf404 | 4813 | tbl->highest_used_slotid = -1; |
557134a3 | 4814 | spin_lock_init(&tbl->slot_tbl_lock); |
689cf5c1 | 4815 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
f8625a6a RL |
4816 | |
4817 | tbl = &session->bc_slot_table; | |
9dfdf404 | 4818 | tbl->highest_used_slotid = -1; |
f8625a6a RL |
4819 | spin_lock_init(&tbl->slot_tbl_lock); |
4820 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); | |
4821 | ||
557134a3 AA |
4822 | session->clp = clp; |
4823 | return session; | |
4824 | } | |
4825 | ||
4826 | void nfs4_destroy_session(struct nfs4_session *session) | |
4827 | { | |
5a0ffe54 AA |
4828 | nfs4_proc_destroy_session(session); |
4829 | dprintk("%s Destroy backchannel for xprt %p\n", | |
4830 | __func__, session->clp->cl_rpcclient->cl_xprt); | |
4831 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, | |
4832 | NFS41_BC_MIN_CALLBACKS); | |
f8625a6a | 4833 | nfs4_destroy_slot_tables(session); |
557134a3 AA |
4834 | kfree(session); |
4835 | } | |
4836 | ||
fc931582 AA |
4837 | /* |
4838 | * Initialize the values to be used by the client in CREATE_SESSION | |
4839 | * If nfs4_init_session set the fore channel request and response sizes, | |
4840 | * use them. | |
4841 | * | |
4842 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4843 | * always set csa_cachethis to FALSE because the current implementation | |
4844 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4845 | */ | |
4846 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4847 | { | |
4848 | struct nfs4_session *session = args->client->cl_session; | |
4849 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4850 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4851 | ||
4852 | if (mxrqst_sz == 0) | |
4853 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4854 | if (mxresp_sz == 0) | |
4855 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4856 | /* Fore channel attributes */ | |
4857 | args->fc_attrs.headerpadsz = 0; | |
4858 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4859 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
fc931582 AA |
4860 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
4861 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4862 | ||
4863 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
8e0d46e1 | 4864 | "max_ops=%u max_reqs=%u\n", |
fc931582 AA |
4865 | __func__, |
4866 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
8e0d46e1 | 4867 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
fc931582 AA |
4868 | |
4869 | /* Back channel attributes */ | |
4870 | args->bc_attrs.headerpadsz = 0; | |
4871 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4872 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4873 | args->bc_attrs.max_resp_sz_cached = 0; | |
4874 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4875 | args->bc_attrs.max_reqs = 1; | |
4876 | ||
4877 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4878 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4879 | __func__, | |
4880 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4881 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4882 | args->bc_attrs.max_reqs); | |
4883 | } | |
4884 | ||
8d35301d AA |
4885 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) |
4886 | { | |
4887 | if (rcvd <= sent) | |
4888 | return 0; | |
4889 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4890 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4891 | return -EINVAL; | |
4892 | } | |
4893 | ||
4894 | #define _verify_fore_channel_attr(_name_) \ | |
4895 | _verify_channel_attr("fore", #_name_, \ | |
4896 | args->fc_attrs._name_, \ | |
4897 | session->fc_attrs._name_) | |
4898 | ||
4899 | #define _verify_back_channel_attr(_name_) \ | |
4900 | _verify_channel_attr("back", #_name_, \ | |
4901 | args->bc_attrs._name_, \ | |
4902 | session->bc_attrs._name_) | |
4903 | ||
4904 | /* | |
4905 | * The server is not allowed to increase the fore channel header pad size, | |
4906 | * maximum response size, or maximum number of operations. | |
4907 | * | |
4908 | * The back channel attributes are only negotiatied down: We send what the | |
4909 | * (back channel) server insists upon. | |
4910 | */ | |
4911 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4912 | struct nfs4_session *session) | |
4913 | { | |
4914 | int ret = 0; | |
4915 | ||
4916 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4917 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4918 | ret |= _verify_fore_channel_attr(max_ops); | |
4919 | ||
4920 | ret |= _verify_back_channel_attr(headerpadsz); | |
4921 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4922 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4923 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4924 | ret |= _verify_back_channel_attr(max_ops); | |
4925 | ret |= _verify_back_channel_attr(max_reqs); | |
4926 | ||
4927 | return ret; | |
4928 | } | |
4929 | ||
fc931582 AA |
4930 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
4931 | { | |
4932 | struct nfs4_session *session = clp->cl_session; | |
4933 | struct nfs41_create_session_args args = { | |
4934 | .client = clp, | |
4935 | .cb_program = NFS4_CALLBACK, | |
4936 | }; | |
4937 | struct nfs41_create_session_res res = { | |
4938 | .client = clp, | |
4939 | }; | |
4940 | struct rpc_message msg = { | |
4941 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4942 | .rpc_argp = &args, | |
4943 | .rpc_resp = &res, | |
4944 | }; | |
4945 | int status; | |
4946 | ||
4947 | nfs4_init_channel_attrs(&args); | |
0f91421e | 4948 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
fc931582 AA |
4949 | |
4950 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4951 | ||
8d35301d AA |
4952 | if (!status) |
4953 | /* Verify the session's negotiated channel_attrs values */ | |
4954 | status = nfs4_verify_channel_attrs(&args, session); | |
fc931582 AA |
4955 | if (!status) { |
4956 | /* Increment the clientid slot sequence id */ | |
4957 | clp->cl_seqid++; | |
4958 | } | |
4959 | ||
4960 | return status; | |
4961 | } | |
4962 | ||
4963 | /* | |
4964 | * Issues a CREATE_SESSION operation to the server. | |
4965 | * It is the responsibility of the caller to verify the session is | |
4966 | * expired before calling this routine. | |
4967 | */ | |
f26468fb | 4968 | int nfs4_proc_create_session(struct nfs_client *clp) |
fc931582 AA |
4969 | { |
4970 | int status; | |
4971 | unsigned *ptr; | |
fc931582 AA |
4972 | struct nfs4_session *session = clp->cl_session; |
4973 | ||
4974 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4975 | ||
4976 | status = _nfs4_proc_create_session(clp); | |
4977 | if (status) | |
4978 | goto out; | |
4979 | ||
f26468fb TM |
4980 | /* Init and reset the fore channel */ |
4981 | status = nfs4_init_slot_tables(session); | |
4982 | dprintk("slot table initialization returned %d\n", status); | |
4983 | if (status) | |
4984 | goto out; | |
4985 | status = nfs4_reset_slot_tables(session); | |
4986 | dprintk("slot table reset returned %d\n", status); | |
fc931582 AA |
4987 | if (status) |
4988 | goto out; | |
4989 | ||
4990 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4991 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4992 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
fc931582 AA |
4993 | out: |
4994 | dprintk("<-- %s\n", __func__); | |
4995 | return status; | |
4996 | } | |
4997 | ||
0f3e66c6 AA |
4998 | /* |
4999 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
5000 | * The caller must serialize access to this routine. | |
5001 | */ | |
5002 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
5003 | { | |
5004 | int status = 0; | |
5005 | struct rpc_message msg; | |
5006 | ||
5007 | dprintk("--> nfs4_proc_destroy_session\n"); | |
5008 | ||
5009 | /* session is still being setup */ | |
5010 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
5011 | return status; | |
5012 | ||
5013 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
5014 | msg.rpc_argp = session; | |
5015 | msg.rpc_resp = NULL; | |
5016 | msg.rpc_cred = NULL; | |
5017 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
5018 | ||
5019 | if (status) | |
5020 | printk(KERN_WARNING | |
5021 | "Got error %d from the server on DESTROY_SESSION. " | |
5022 | "Session has been destroyed regardless...\n", status); | |
5023 | ||
5024 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
5025 | return status; | |
5026 | } | |
5027 | ||
fccba804 TM |
5028 | int nfs4_init_session(struct nfs_server *server) |
5029 | { | |
5030 | struct nfs_client *clp = server->nfs_client; | |
2449ea2e | 5031 | struct nfs4_session *session; |
68bf05ef | 5032 | unsigned int rsize, wsize; |
fccba804 TM |
5033 | int ret; |
5034 | ||
5035 | if (!nfs4_has_session(clp)) | |
5036 | return 0; | |
5037 | ||
68bf05ef AA |
5038 | rsize = server->rsize; |
5039 | if (rsize == 0) | |
5040 | rsize = NFS_MAX_FILE_IO_SIZE; | |
5041 | wsize = server->wsize; | |
5042 | if (wsize == 0) | |
5043 | wsize = NFS_MAX_FILE_IO_SIZE; | |
5044 | ||
2449ea2e | 5045 | session = clp->cl_session; |
68bf05ef AA |
5046 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
5047 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; | |
2449ea2e | 5048 | |
fccba804 TM |
5049 | ret = nfs4_recover_expired_lease(server); |
5050 | if (!ret) | |
5051 | ret = nfs4_check_client_ready(clp); | |
5052 | return ret; | |
5053 | } | |
5054 | ||
fc01cea9 AA |
5055 | /* |
5056 | * Renew the cl_session lease. | |
5057 | */ | |
d5f8d3fe TM |
5058 | struct nfs4_sequence_data { |
5059 | struct nfs_client *clp; | |
5060 | struct nfs4_sequence_args args; | |
5061 | struct nfs4_sequence_res res; | |
5062 | }; | |
5063 | ||
dc96aef9 AB |
5064 | static void nfs41_sequence_release(void *data) |
5065 | { | |
d5f8d3fe TM |
5066 | struct nfs4_sequence_data *calldata = data; |
5067 | struct nfs_client *clp = calldata->clp; | |
dc96aef9 | 5068 | |
7135840f AB |
5069 | if (atomic_read(&clp->cl_count) > 1) |
5070 | nfs4_schedule_state_renewal(clp); | |
5071 | nfs_put_client(clp); | |
d5f8d3fe | 5072 | kfree(calldata); |
dc96aef9 AB |
5073 | } |
5074 | ||
aa5190d0 TM |
5075 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5076 | { | |
5077 | switch(task->tk_status) { | |
5078 | case -NFS4ERR_DELAY: | |
5079 | case -EKEYEXPIRED: | |
5080 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5081 | return -EAGAIN; | |
5082 | default: | |
5083 | nfs4_schedule_state_recovery(clp); | |
5084 | } | |
5085 | return 0; | |
5086 | } | |
5087 | ||
dc96aef9 | 5088 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
fc01cea9 | 5089 | { |
d5f8d3fe TM |
5090 | struct nfs4_sequence_data *calldata = data; |
5091 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 | 5092 | |
d185a334 | 5093 | nfs41_sequence_done(task->tk_msg.rpc_resp); |
fc01cea9 AA |
5094 | |
5095 | if (task->tk_status < 0) { | |
5096 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
7135840f AB |
5097 | if (atomic_read(&clp->cl_count) == 1) |
5098 | goto out; | |
fc01cea9 | 5099 | |
aa5190d0 TM |
5100 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
5101 | rpc_restart_call_prepare(task); | |
fc01cea9 AA |
5102 | return; |
5103 | } | |
5104 | } | |
fc01cea9 | 5105 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
7135840f | 5106 | out: |
fc01cea9 AA |
5107 | dprintk("<-- %s\n", __func__); |
5108 | } | |
5109 | ||
5110 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5111 | { | |
d5f8d3fe TM |
5112 | struct nfs4_sequence_data *calldata = data; |
5113 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 AA |
5114 | struct nfs4_sequence_args *args; |
5115 | struct nfs4_sequence_res *res; | |
5116 | ||
fc01cea9 AA |
5117 | args = task->tk_msg.rpc_argp; |
5118 | res = task->tk_msg.rpc_resp; | |
5119 | ||
035168ab | 5120 | if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) |
fc01cea9 AA |
5121 | return; |
5122 | rpc_call_start(task); | |
5123 | } | |
5124 | ||
5125 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5126 | .rpc_call_done = nfs41_sequence_call_done, | |
5127 | .rpc_call_prepare = nfs41_sequence_prepare, | |
dc96aef9 | 5128 | .rpc_release = nfs41_sequence_release, |
fc01cea9 AA |
5129 | }; |
5130 | ||
71ac6da9 | 5131 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
fc01cea9 | 5132 | { |
d5f8d3fe | 5133 | struct nfs4_sequence_data *calldata; |
fc01cea9 AA |
5134 | struct rpc_message msg = { |
5135 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5136 | .rpc_cred = cred, | |
5137 | }; | |
71ac6da9 TM |
5138 | struct rpc_task_setup task_setup_data = { |
5139 | .rpc_client = clp->cl_rpcclient, | |
5140 | .rpc_message = &msg, | |
5141 | .callback_ops = &nfs41_sequence_ops, | |
5142 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, | |
5143 | }; | |
fc01cea9 | 5144 | |
7135840f | 5145 | if (!atomic_inc_not_zero(&clp->cl_count)) |
71ac6da9 | 5146 | return ERR_PTR(-EIO); |
d5f8d3fe TM |
5147 | calldata = kmalloc(sizeof(*calldata), GFP_NOFS); |
5148 | if (calldata == NULL) { | |
7135840f | 5149 | nfs_put_client(clp); |
71ac6da9 | 5150 | return ERR_PTR(-ENOMEM); |
fc01cea9 | 5151 | } |
d5f8d3fe TM |
5152 | calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5153 | msg.rpc_argp = &calldata->args; | |
5154 | msg.rpc_resp = &calldata->res; | |
5155 | calldata->clp = clp; | |
71ac6da9 | 5156 | task_setup_data.callback_data = calldata; |
fc01cea9 | 5157 | |
71ac6da9 TM |
5158 | return rpc_run_task(&task_setup_data); |
5159 | } | |
5160 | ||
5161 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5162 | { | |
5163 | struct rpc_task *task; | |
5164 | int ret = 0; | |
5165 | ||
5166 | task = _nfs41_proc_sequence(clp, cred); | |
5167 | if (IS_ERR(task)) | |
5168 | ret = PTR_ERR(task); | |
5169 | else | |
5170 | rpc_put_task(task); | |
5171 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5172 | return ret; | |
5173 | } | |
5174 | ||
5175 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5176 | { | |
5177 | struct rpc_task *task; | |
5178 | int ret; | |
5179 | ||
5180 | task = _nfs41_proc_sequence(clp, cred); | |
5181 | if (IS_ERR(task)) { | |
5182 | ret = PTR_ERR(task); | |
5183 | goto out; | |
5184 | } | |
5185 | ret = rpc_wait_for_completion_task(task); | |
5186 | if (!ret) | |
5187 | ret = task->tk_status; | |
5188 | rpc_put_task(task); | |
5189 | out: | |
5190 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5191 | return ret; | |
fc01cea9 AA |
5192 | } |
5193 | ||
fce5c838 RL |
5194 | struct nfs4_reclaim_complete_data { |
5195 | struct nfs_client *clp; | |
5196 | struct nfs41_reclaim_complete_args arg; | |
5197 | struct nfs41_reclaim_complete_res res; | |
5198 | }; | |
5199 | ||
5200 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5201 | { | |
5202 | struct nfs4_reclaim_complete_data *calldata = data; | |
5203 | ||
b257957e | 5204 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
035168ab TM |
5205 | if (nfs41_setup_sequence(calldata->clp->cl_session, |
5206 | &calldata->arg.seq_args, | |
fce5c838 RL |
5207 | &calldata->res.seq_res, 0, task)) |
5208 | return; | |
5209 | ||
5210 | rpc_call_start(task); | |
5211 | } | |
5212 | ||
aa5190d0 TM |
5213 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5214 | { | |
5215 | switch(task->tk_status) { | |
5216 | case 0: | |
5217 | case -NFS4ERR_COMPLETE_ALREADY: | |
5218 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ | |
5219 | break; | |
5220 | case -NFS4ERR_DELAY: | |
5221 | case -EKEYEXPIRED: | |
5222 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5223 | return -EAGAIN; | |
5224 | default: | |
5225 | nfs4_schedule_state_recovery(clp); | |
5226 | } | |
5227 | return 0; | |
5228 | } | |
5229 | ||
fce5c838 RL |
5230 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
5231 | { | |
5232 | struct nfs4_reclaim_complete_data *calldata = data; | |
5233 | struct nfs_client *clp = calldata->clp; | |
5234 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5235 | ||
5236 | dprintk("--> %s\n", __func__); | |
d185a334 | 5237 | nfs41_sequence_done(res); |
fce5c838 | 5238 | |
aa5190d0 TM |
5239 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
5240 | rpc_restart_call_prepare(task); | |
5241 | return; | |
5242 | } | |
fce5c838 RL |
5243 | dprintk("<-- %s\n", __func__); |
5244 | } | |
5245 | ||
5246 | static void nfs4_free_reclaim_complete_data(void *data) | |
5247 | { | |
5248 | struct nfs4_reclaim_complete_data *calldata = data; | |
5249 | ||
5250 | kfree(calldata); | |
5251 | } | |
5252 | ||
5253 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5254 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5255 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5256 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5257 | }; | |
5258 | ||
5259 | /* | |
5260 | * Issue a global reclaim complete. | |
5261 | */ | |
5262 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5263 | { | |
5264 | struct nfs4_reclaim_complete_data *calldata; | |
5265 | struct rpc_task *task; | |
5266 | struct rpc_message msg = { | |
5267 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5268 | }; | |
5269 | struct rpc_task_setup task_setup_data = { | |
5270 | .rpc_client = clp->cl_rpcclient, | |
5271 | .rpc_message = &msg, | |
5272 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5273 | .flags = RPC_TASK_ASYNC, | |
5274 | }; | |
5275 | int status = -ENOMEM; | |
5276 | ||
5277 | dprintk("--> %s\n", __func__); | |
8535b2be | 5278 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
fce5c838 RL |
5279 | if (calldata == NULL) |
5280 | goto out; | |
5281 | calldata->clp = clp; | |
5282 | calldata->arg.one_fs = 0; | |
5283 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
5284 | ||
5285 | msg.rpc_argp = &calldata->arg; | |
5286 | msg.rpc_resp = &calldata->res; | |
5287 | task_setup_data.callback_data = calldata; | |
5288 | task = rpc_run_task(&task_setup_data); | |
acf82b85 | 5289 | if (IS_ERR(task)) { |
fce5c838 | 5290 | status = PTR_ERR(task); |
acf82b85 DC |
5291 | goto out; |
5292 | } | |
fce5c838 | 5293 | rpc_put_task(task); |
acf82b85 | 5294 | return 0; |
fce5c838 RL |
5295 | out: |
5296 | dprintk("<-- %s status=%d\n", __func__, status); | |
5297 | return status; | |
5298 | } | |
557134a3 AA |
5299 | #endif /* CONFIG_NFS_V4_1 */ |
5300 | ||
591d71cb | 5301 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
7eff03ae | 5302 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 5303 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
5304 | .recover_open = nfs4_open_reclaim, |
5305 | .recover_lock = nfs4_lock_reclaim, | |
591d71cb | 5306 | .establish_clid = nfs4_init_clientid, |
90a16617 | 5307 | .get_clid_cred = nfs4_get_setclientid_cred, |
1da177e4 LT |
5308 | }; |
5309 | ||
591d71cb AA |
5310 | #if defined(CONFIG_NFS_V4_1) |
5311 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
5312 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
5313 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
5314 | .recover_open = nfs4_open_reclaim, | |
5315 | .recover_lock = nfs4_lock_reclaim, | |
4d643d1d | 5316 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5317 | .get_clid_cred = nfs4_get_exchange_id_cred, |
fce5c838 | 5318 | .reclaim_complete = nfs41_proc_reclaim_complete, |
591d71cb AA |
5319 | }; |
5320 | #endif /* CONFIG_NFS_V4_1 */ | |
5321 | ||
5322 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
5323 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
5324 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
5325 | .recover_open = nfs4_open_expired, | |
5326 | .recover_lock = nfs4_lock_expired, | |
5327 | .establish_clid = nfs4_init_clientid, | |
90a16617 | 5328 | .get_clid_cred = nfs4_get_setclientid_cred, |
591d71cb AA |
5329 | }; |
5330 | ||
5331 | #if defined(CONFIG_NFS_V4_1) | |
5332 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
7eff03ae | 5333 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 5334 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
5335 | .recover_open = nfs4_open_expired, |
5336 | .recover_lock = nfs4_lock_expired, | |
4d643d1d | 5337 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5338 | .get_clid_cred = nfs4_get_exchange_id_cred, |
1da177e4 | 5339 | }; |
591d71cb | 5340 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 | 5341 | |
29fba38b BH |
5342 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
5343 | .sched_state_renewal = nfs4_proc_async_renew, | |
a7b72103 | 5344 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
8e69514f | 5345 | .renew_lease = nfs4_proc_renew, |
29fba38b BH |
5346 | }; |
5347 | ||
5348 | #if defined(CONFIG_NFS_V4_1) | |
5349 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
5350 | .sched_state_renewal = nfs41_proc_async_sequence, | |
a7b72103 | 5351 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
8e69514f | 5352 | .renew_lease = nfs4_proc_sequence, |
29fba38b BH |
5353 | }; |
5354 | #endif | |
5355 | ||
97dc1359 TM |
5356 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
5357 | .minor_version = 0, | |
5358 | .call_sync = _nfs4_call_sync, | |
e047a10c | 5359 | .validate_stateid = nfs4_validate_delegation_stateid, |
c48f4f35 TM |
5360 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
5361 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, | |
5362 | .state_renewal_ops = &nfs40_state_renewal_ops, | |
97dc1359 TM |
5363 | }; |
5364 | ||
5365 | #if defined(CONFIG_NFS_V4_1) | |
5366 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { | |
5367 | .minor_version = 1, | |
5368 | .call_sync = _nfs4_call_sync_session, | |
e047a10c | 5369 | .validate_stateid = nfs41_validate_delegation_stateid, |
c48f4f35 TM |
5370 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
5371 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, | |
5372 | .state_renewal_ops = &nfs41_state_renewal_ops, | |
97dc1359 TM |
5373 | }; |
5374 | #endif | |
5375 | ||
97dc1359 TM |
5376 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
5377 | [0] = &nfs_v4_0_minor_ops, | |
5378 | #if defined(CONFIG_NFS_V4_1) | |
5379 | [1] = &nfs_v4_1_minor_ops, | |
5380 | #endif | |
5381 | }; | |
5382 | ||
92e1d5be | 5383 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
5384 | .permission = nfs_permission, |
5385 | .getattr = nfs_getattr, | |
5386 | .setattr = nfs_setattr, | |
5387 | .getxattr = nfs4_getxattr, | |
5388 | .setxattr = nfs4_setxattr, | |
5389 | .listxattr = nfs4_listxattr, | |
5390 | }; | |
5391 | ||
509de811 | 5392 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
5393 | .version = 4, /* protocol version */ |
5394 | .dentry_ops = &nfs4_dentry_operations, | |
5395 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 5396 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
5397 | .getroot = nfs4_proc_get_root, |
5398 | .getattr = nfs4_proc_getattr, | |
5399 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 5400 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
5401 | .lookup = nfs4_proc_lookup, |
5402 | .access = nfs4_proc_access, | |
5403 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
5404 | .create = nfs4_proc_create, |
5405 | .remove = nfs4_proc_remove, | |
5406 | .unlink_setup = nfs4_proc_unlink_setup, | |
5407 | .unlink_done = nfs4_proc_unlink_done, | |
5408 | .rename = nfs4_proc_rename, | |
5409 | .link = nfs4_proc_link, | |
5410 | .symlink = nfs4_proc_symlink, | |
5411 | .mkdir = nfs4_proc_mkdir, | |
5412 | .rmdir = nfs4_proc_remove, | |
5413 | .readdir = nfs4_proc_readdir, | |
5414 | .mknod = nfs4_proc_mknod, | |
5415 | .statfs = nfs4_proc_statfs, | |
5416 | .fsinfo = nfs4_proc_fsinfo, | |
5417 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 5418 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
5419 | .decode_dirent = nfs4_decode_dirent, |
5420 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 5421 | .read_done = nfs4_read_done, |
1da177e4 | 5422 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 5423 | .write_done = nfs4_write_done, |
1da177e4 | 5424 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 5425 | .commit_done = nfs4_commit_done, |
1da177e4 | 5426 | .lock = nfs4_proc_lock, |
e50a1c2e | 5427 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 5428 | .close_context = nfs4_close_context, |
1da177e4 LT |
5429 | }; |
5430 | ||
5431 | /* | |
5432 | * Local variables: | |
5433 | * c-basic-offset: 8 | |
5434 | * End: | |
5435 | */ |