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, | |
55b6e774 | 132 | FATTR4_WORD1_TIME_DELTA |
1da177e4 LT |
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 | 258 | case -NFS4ERR_STALE_CLIENTID: |
65de872e | 259 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 260 | goto do_state_recovery; |
03391693 | 261 | #if defined(CONFIG_NFS_V4_1) |
4745e315 AA |
262 | case -NFS4ERR_BADSESSION: |
263 | case -NFS4ERR_BADSLOT: | |
264 | case -NFS4ERR_BAD_HIGH_SLOT: | |
265 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
266 | case -NFS4ERR_DEADSESSION: | |
267 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
268 | case -NFS4ERR_SEQ_MISORDERED: | |
269 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
270 | errorcode); | |
0b9e2d41 | 271 | nfs4_schedule_state_recovery(clp); |
4745e315 | 272 | exception->retry = 1; |
b9179237 | 273 | break; |
03391693 | 274 | #endif /* defined(CONFIG_NFS_V4_1) */ |
65de872e | 275 | case -NFS4ERR_FILE_OPEN: |
44ed3556 N |
276 | if (exception->timeout > HZ) { |
277 | /* We have retried a decent amount, time to | |
278 | * fail | |
279 | */ | |
280 | ret = -EBUSY; | |
281 | break; | |
282 | } | |
65de872e TM |
283 | case -NFS4ERR_GRACE: |
284 | case -NFS4ERR_DELAY: | |
2c643488 | 285 | case -EKEYEXPIRED: |
65de872e TM |
286 | ret = nfs4_delay(server->client, &exception->timeout); |
287 | if (ret != 0) | |
288 | break; | |
289 | case -NFS4ERR_OLD_STATEID: | |
290 | exception->retry = 1; | |
291 | } | |
292 | /* We failed to handle the error */ | |
293 | return nfs4_map_errors(ret); | |
a2c0b9e2 TM |
294 | do_state_recovery: |
295 | nfs4_schedule_state_recovery(clp); | |
296 | ret = nfs4_wait_clnt_recover(clp); | |
297 | if (ret == 0) | |
298 | exception->retry = 1; | |
299 | return ret; | |
65de872e TM |
300 | } |
301 | ||
302 | ||
452e9352 | 303 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
1da177e4 | 304 | { |
1da177e4 LT |
305 | spin_lock(&clp->cl_lock); |
306 | if (time_before(clp->cl_last_renewal,timestamp)) | |
307 | clp->cl_last_renewal = timestamp; | |
308 | spin_unlock(&clp->cl_lock); | |
309 | } | |
310 | ||
452e9352 TM |
311 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
312 | { | |
313 | do_renew_lease(server->nfs_client, timestamp); | |
314 | } | |
315 | ||
cccef3b9 AA |
316 | #if defined(CONFIG_NFS_V4_1) |
317 | ||
e2c4ab3c AA |
318 | /* |
319 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
320 | * | |
321 | * freeing a slot is trivially done by clearing its respective bit | |
322 | * in the bitmap. | |
323 | * If the freed slotid equals highest_used_slotid we want to update it | |
324 | * so that the server would be able to size down the slot table if needed, | |
325 | * otherwise we know that the highest_used_slotid is still in use. | |
326 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
327 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
328 | * highest slotid in use. | |
329 | * If none found, highest_used_slotid is set to -1. | |
35dc1d74 TM |
330 | * |
331 | * Must be called while holding tbl->slot_tbl_lock | |
e2c4ab3c AA |
332 | */ |
333 | static void | |
dfb4f309 | 334 | nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot) |
e2c4ab3c | 335 | { |
dfb4f309 | 336 | int free_slotid = free_slot - tbl->slots; |
e2c4ab3c AA |
337 | int slotid = free_slotid; |
338 | ||
dfb4f309 | 339 | BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE); |
e2c4ab3c AA |
340 | /* clear used bit in bitmap */ |
341 | __clear_bit(slotid, tbl->used_slots); | |
342 | ||
343 | /* update highest_used_slotid when it is freed */ | |
344 | if (slotid == tbl->highest_used_slotid) { | |
345 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
bcb56164 | 346 | if (slotid < tbl->max_slots) |
e2c4ab3c AA |
347 | tbl->highest_used_slotid = slotid; |
348 | else | |
349 | tbl->highest_used_slotid = -1; | |
350 | } | |
e2c4ab3c AA |
351 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
352 | free_slotid, tbl->highest_used_slotid); | |
353 | } | |
354 | ||
3bfb0fc5 AB |
355 | /* |
356 | * Signal state manager thread if session is drained | |
357 | */ | |
358 | static void nfs41_check_drain_session_complete(struct nfs4_session *ses) | |
359 | { | |
689cf5c1 AB |
360 | struct rpc_task *task; |
361 | ||
a2118c33 | 362 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
689cf5c1 AB |
363 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
364 | if (task) | |
365 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
3bfb0fc5 AB |
366 | return; |
367 | } | |
368 | ||
369 | if (ses->fc_slot_table.highest_used_slotid != -1) | |
370 | return; | |
371 | ||
372 | dprintk("%s COMPLETE: Session Drained\n", __func__); | |
373 | complete(&ses->complete); | |
374 | } | |
375 | ||
d185a334 | 376 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
13615871 AA |
377 | { |
378 | struct nfs4_slot_table *tbl; | |
379 | ||
d185a334 | 380 | tbl = &res->sr_session->fc_slot_table; |
dfb4f309 | 381 | if (!res->sr_slot) { |
13615871 AA |
382 | /* just wake up the next guy waiting since |
383 | * we may have not consumed a slot after all */ | |
691daf3b | 384 | dprintk("%s: No slot\n", __func__); |
35dc1d74 | 385 | return; |
13615871 | 386 | } |
ea028ac9 | 387 | |
35dc1d74 | 388 | spin_lock(&tbl->slot_tbl_lock); |
dfb4f309 | 389 | nfs4_free_slot(tbl, res->sr_slot); |
d185a334 | 390 | nfs41_check_drain_session_complete(res->sr_session); |
35dc1d74 | 391 | spin_unlock(&tbl->slot_tbl_lock); |
dfb4f309 | 392 | res->sr_slot = NULL; |
13615871 AA |
393 | } |
394 | ||
14516c3a | 395 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
b0df806c AA |
396 | { |
397 | unsigned long timestamp; | |
14516c3a | 398 | struct nfs_client *clp; |
b0df806c AA |
399 | |
400 | /* | |
401 | * sr_status remains 1 if an RPC level error occurred. The server | |
402 | * may or may not have processed the sequence operation.. | |
403 | * Proceed as if the server received and processed the sequence | |
404 | * operation. | |
405 | */ | |
406 | if (res->sr_status == 1) | |
407 | res->sr_status = NFS_OK; | |
408 | ||
409 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
dfb4f309 | 410 | if (!res->sr_slot) |
b0df806c AA |
411 | goto out; |
412 | ||
691daf3b | 413 | /* Check the SEQUENCE operation status */ |
14516c3a TM |
414 | switch (res->sr_status) { |
415 | case 0: | |
b0df806c | 416 | /* Update the slot's sequence and clientid lease timer */ |
dfb4f309 | 417 | ++res->sr_slot->seq_nr; |
b0df806c | 418 | timestamp = res->sr_renewal_time; |
14516c3a | 419 | clp = res->sr_session->clp; |
452e9352 | 420 | do_renew_lease(clp, timestamp); |
0629e370 | 421 | /* Check sequence flags */ |
7135840f AB |
422 | if (atomic_read(&clp->cl_count) > 1) |
423 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
14516c3a TM |
424 | break; |
425 | case -NFS4ERR_DELAY: | |
426 | /* The server detected a resend of the RPC call and | |
427 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 | |
428 | * of RFC5661. | |
429 | */ | |
dfb4f309 BH |
430 | dprintk("%s: slot=%ld seq=%d: Operation in progress\n", |
431 | __func__, | |
432 | res->sr_slot - res->sr_session->fc_slot_table.slots, | |
433 | res->sr_slot->seq_nr); | |
14516c3a TM |
434 | goto out_retry; |
435 | default: | |
436 | /* Just update the slot sequence no. */ | |
dfb4f309 | 437 | ++res->sr_slot->seq_nr; |
b0df806c AA |
438 | } |
439 | out: | |
440 | /* The session may be reset by one of the error handlers. */ | |
441 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
d185a334 | 442 | nfs41_sequence_free_slot(res); |
14516c3a TM |
443 | return 1; |
444 | out_retry: | |
d05dd4e9 | 445 | if (!rpc_restart_call(task)) |
14516c3a TM |
446 | goto out; |
447 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
448 | return 0; | |
b0df806c AA |
449 | } |
450 | ||
14516c3a TM |
451 | static int nfs4_sequence_done(struct rpc_task *task, |
452 | struct nfs4_sequence_res *res) | |
df896455 | 453 | { |
14516c3a TM |
454 | if (res->sr_session == NULL) |
455 | return 1; | |
456 | return nfs41_sequence_done(task, res); | |
df896455 TM |
457 | } |
458 | ||
510b8175 BH |
459 | /* |
460 | * nfs4_find_slot - efficiently look for a free slot | |
461 | * | |
462 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
463 | * If found, we mark the slot as used, update the highest_used_slotid, | |
464 | * and respectively set up the sequence operation args. | |
465 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
466 | * |
467 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
468 | */ |
469 | static u8 | |
40ead580 | 470 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
510b8175 BH |
471 | { |
472 | int slotid; | |
473 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
474 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
475 | ||
510b8175 BH |
476 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
477 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
478 | tbl->max_slots); | |
479 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
480 | if (slotid >= tbl->max_slots) | |
481 | goto out; | |
482 | __set_bit(slotid, tbl->used_slots); | |
483 | if (slotid > tbl->highest_used_slotid) | |
484 | tbl->highest_used_slotid = slotid; | |
485 | ret_id = slotid; | |
486 | out: | |
487 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
488 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
489 | return ret_id; |
490 | } | |
491 | ||
ce5039c1 AA |
492 | static int nfs41_setup_sequence(struct nfs4_session *session, |
493 | struct nfs4_sequence_args *args, | |
494 | struct nfs4_sequence_res *res, | |
495 | int cache_reply, | |
496 | struct rpc_task *task) | |
497 | { | |
fbcd4abc AA |
498 | struct nfs4_slot *slot; |
499 | struct nfs4_slot_table *tbl; | |
500 | u8 slotid; | |
501 | ||
502 | dprintk("--> %s\n", __func__); | |
ce5039c1 | 503 | /* slot already allocated? */ |
dfb4f309 | 504 | if (res->sr_slot != NULL) |
ce5039c1 AA |
505 | return 0; |
506 | ||
fbcd4abc AA |
507 | tbl = &session->fc_slot_table; |
508 | ||
509 | spin_lock(&tbl->slot_tbl_lock); | |
a2118c33 | 510 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
5601a00d | 511 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
ea028ac9 AA |
512 | /* |
513 | * The state manager will wait until the slot table is empty. | |
514 | * Schedule the reset thread | |
515 | */ | |
05f0d236 | 516 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
b069d94a | 517 | spin_unlock(&tbl->slot_tbl_lock); |
bcb56164 | 518 | dprintk("%s Schedule Session Reset\n", __func__); |
05f0d236 | 519 | return -EAGAIN; |
b069d94a AA |
520 | } |
521 | ||
689cf5c1 AB |
522 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
523 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
524 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
525 | spin_unlock(&tbl->slot_tbl_lock); | |
526 | dprintk("%s enforce FIFO order\n", __func__); | |
527 | return -EAGAIN; | |
528 | } | |
529 | ||
40ead580 | 530 | slotid = nfs4_find_slot(tbl); |
fbcd4abc AA |
531 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
532 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
533 | spin_unlock(&tbl->slot_tbl_lock); | |
534 | dprintk("<-- %s: no free slots\n", __func__); | |
535 | return -EAGAIN; | |
536 | } | |
537 | spin_unlock(&tbl->slot_tbl_lock); | |
538 | ||
689cf5c1 | 539 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
fbcd4abc | 540 | slot = tbl->slots + slotid; |
99fe60d0 | 541 | args->sa_session = session; |
fbcd4abc AA |
542 | args->sa_slotid = slotid; |
543 | args->sa_cache_this = cache_reply; | |
544 | ||
545 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
546 | ||
99fe60d0 | 547 | res->sr_session = session; |
dfb4f309 | 548 | res->sr_slot = slot; |
fbcd4abc | 549 | res->sr_renewal_time = jiffies; |
2a6e26cd | 550 | res->sr_status_flags = 0; |
fbcd4abc AA |
551 | /* |
552 | * sr_status is only set in decode_sequence, and so will remain | |
553 | * set to 1 if an rpc level failure occurs. | |
554 | */ | |
555 | res->sr_status = 1; | |
ce5039c1 AA |
556 | return 0; |
557 | } | |
558 | ||
035168ab | 559 | int nfs4_setup_sequence(const struct nfs_server *server, |
ce5039c1 AA |
560 | struct nfs4_sequence_args *args, |
561 | struct nfs4_sequence_res *res, | |
562 | int cache_reply, | |
563 | struct rpc_task *task) | |
564 | { | |
035168ab | 565 | struct nfs4_session *session = nfs4_get_session(server); |
ce5039c1 AA |
566 | int ret = 0; |
567 | ||
035168ab TM |
568 | if (session == NULL) { |
569 | args->sa_session = NULL; | |
570 | res->sr_session = NULL; | |
571 | goto out; | |
572 | } | |
573 | ||
dfb4f309 BH |
574 | dprintk("--> %s clp %p session %p sr_slot %ld\n", |
575 | __func__, session->clp, session, res->sr_slot ? | |
576 | res->sr_slot - session->fc_slot_table.slots : -1); | |
ce5039c1 | 577 | |
035168ab | 578 | ret = nfs41_setup_sequence(session, args, res, cache_reply, |
ce5039c1 | 579 | task); |
ce5039c1 AA |
580 | out: |
581 | dprintk("<-- %s status=%d\n", __func__, ret); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | struct nfs41_call_sync_data { | |
035168ab | 586 | const struct nfs_server *seq_server; |
ce5039c1 AA |
587 | struct nfs4_sequence_args *seq_args; |
588 | struct nfs4_sequence_res *seq_res; | |
589 | int cache_reply; | |
590 | }; | |
591 | ||
592 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
593 | { | |
594 | struct nfs41_call_sync_data *data = calldata; | |
595 | ||
035168ab TM |
596 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
597 | ||
598 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, | |
ce5039c1 AA |
599 | data->seq_res, data->cache_reply, task)) |
600 | return; | |
601 | rpc_call_start(task); | |
602 | } | |
603 | ||
b257957e AB |
604 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
605 | { | |
606 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
607 | nfs41_call_sync_prepare(task, calldata); | |
608 | } | |
609 | ||
69ab40c4 AA |
610 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
611 | { | |
612 | struct nfs41_call_sync_data *data = calldata; | |
613 | ||
14516c3a | 614 | nfs41_sequence_done(task, data->seq_res); |
69ab40c4 AA |
615 | } |
616 | ||
ce5039c1 AA |
617 | struct rpc_call_ops nfs41_call_sync_ops = { |
618 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 619 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
620 | }; |
621 | ||
b257957e AB |
622 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
623 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, | |
624 | .rpc_call_done = nfs41_call_sync_done, | |
625 | }; | |
626 | ||
035168ab | 627 | static int nfs4_call_sync_sequence(struct nfs_server *server, |
ce5039c1 AA |
628 | struct rpc_message *msg, |
629 | struct nfs4_sequence_args *args, | |
630 | struct nfs4_sequence_res *res, | |
b257957e AB |
631 | int cache_reply, |
632 | int privileged) | |
ce5039c1 AA |
633 | { |
634 | int ret; | |
635 | struct rpc_task *task; | |
636 | struct nfs41_call_sync_data data = { | |
035168ab | 637 | .seq_server = server, |
ce5039c1 AA |
638 | .seq_args = args, |
639 | .seq_res = res, | |
640 | .cache_reply = cache_reply, | |
641 | }; | |
642 | struct rpc_task_setup task_setup = { | |
035168ab | 643 | .rpc_client = server->client, |
ce5039c1 AA |
644 | .rpc_message = msg, |
645 | .callback_ops = &nfs41_call_sync_ops, | |
646 | .callback_data = &data | |
647 | }; | |
648 | ||
dfb4f309 | 649 | res->sr_slot = NULL; |
b257957e AB |
650 | if (privileged) |
651 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; | |
ce5039c1 AA |
652 | task = rpc_run_task(&task_setup); |
653 | if (IS_ERR(task)) | |
654 | ret = PTR_ERR(task); | |
655 | else { | |
656 | ret = task->tk_status; | |
657 | rpc_put_task(task); | |
658 | } | |
659 | return ret; | |
660 | } | |
661 | ||
cccef3b9 AA |
662 | int _nfs4_call_sync_session(struct nfs_server *server, |
663 | struct rpc_message *msg, | |
664 | struct nfs4_sequence_args *args, | |
665 | struct nfs4_sequence_res *res, | |
666 | int cache_reply) | |
667 | { | |
035168ab | 668 | return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0); |
cccef3b9 AA |
669 | } |
670 | ||
df896455 | 671 | #else |
14516c3a TM |
672 | static int nfs4_sequence_done(struct rpc_task *task, |
673 | struct nfs4_sequence_res *res) | |
df896455 | 674 | { |
14516c3a | 675 | return 1; |
df896455 | 676 | } |
cccef3b9 AA |
677 | #endif /* CONFIG_NFS_V4_1 */ |
678 | ||
679 | int _nfs4_call_sync(struct nfs_server *server, | |
680 | struct rpc_message *msg, | |
681 | struct nfs4_sequence_args *args, | |
682 | struct nfs4_sequence_res *res, | |
683 | int cache_reply) | |
684 | { | |
f3752975 | 685 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
686 | return rpc_call_sync(server->client, msg, 0); |
687 | } | |
688 | ||
689 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
97dc1359 | 690 | (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \ |
cccef3b9 AA |
691 | &(res)->seq_res, (cache_reply)) |
692 | ||
38478b24 | 693 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 694 | { |
38478b24 | 695 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 696 | |
38478b24 | 697 | spin_lock(&dir->i_lock); |
40d24704 TM |
698 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
699 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 700 | nfs_force_lookup_revalidate(dir); |
40d24704 | 701 | nfsi->change_attr = cinfo->after; |
38478b24 | 702 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
703 | } |
704 | ||
e56e0b78 | 705 | struct nfs4_opendata { |
c6d00e63 | 706 | struct kref kref; |
e56e0b78 TM |
707 | struct nfs_openargs o_arg; |
708 | struct nfs_openres o_res; | |
cdd4e68b TM |
709 | struct nfs_open_confirmargs c_arg; |
710 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
711 | struct nfs_fattr f_attr; |
712 | struct nfs_fattr dir_attr; | |
ad389da7 | 713 | struct path path; |
e56e0b78 TM |
714 | struct dentry *dir; |
715 | struct nfs4_state_owner *owner; | |
aac00a8d | 716 | struct nfs4_state *state; |
e56e0b78 | 717 | struct iattr attrs; |
26e976a8 | 718 | unsigned long timestamp; |
3e309914 | 719 | unsigned int rpc_done : 1; |
24ac23ab TM |
720 | int rpc_status; |
721 | int cancelled; | |
e56e0b78 TM |
722 | }; |
723 | ||
2ced46c2 TM |
724 | |
725 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
726 | { | |
727 | p->o_res.f_attr = &p->f_attr; | |
728 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
729 | p->o_res.seqid = p->o_arg.seqid; |
730 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
731 | p->o_res.server = p->o_arg.server; |
732 | nfs_fattr_init(&p->f_attr); | |
733 | nfs_fattr_init(&p->dir_attr); | |
734 | } | |
735 | ||
ad389da7 | 736 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 737 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
8535b2be TM |
738 | const struct iattr *attrs, |
739 | gfp_t gfp_mask) | |
e56e0b78 | 740 | { |
ad389da7 | 741 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
742 | struct inode *dir = parent->d_inode; |
743 | struct nfs_server *server = NFS_SERVER(dir); | |
744 | struct nfs4_opendata *p; | |
745 | ||
8535b2be | 746 | p = kzalloc(sizeof(*p), gfp_mask); |
e56e0b78 TM |
747 | if (p == NULL) |
748 | goto err; | |
8535b2be | 749 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
e56e0b78 TM |
750 | if (p->o_arg.seqid == NULL) |
751 | goto err_free; | |
f6948697 AV |
752 | path_get(path); |
753 | p->path = *path; | |
e56e0b78 TM |
754 | p->dir = parent; |
755 | p->owner = sp; | |
756 | atomic_inc(&sp->so_count); | |
757 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
758 | p->o_arg.open_flags = flags; |
759 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 760 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 761 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 762 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
763 | p->o_arg.server = server; |
764 | p->o_arg.bitmask = server->attr_bitmask; | |
765 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
d77d76ff TM |
766 | if (flags & O_CREAT) { |
767 | u32 *s; | |
768 | ||
e56e0b78 TM |
769 | p->o_arg.u.attrs = &p->attrs; |
770 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
d77d76ff TM |
771 | s = (u32 *) p->o_arg.u.verifier.data; |
772 | s[0] = jiffies; | |
773 | s[1] = current->pid; | |
e56e0b78 | 774 | } |
cdd4e68b TM |
775 | p->c_arg.fh = &p->o_res.fh; |
776 | p->c_arg.stateid = &p->o_res.stateid; | |
777 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 778 | nfs4_init_opendata_res(p); |
c6d00e63 | 779 | kref_init(&p->kref); |
e56e0b78 TM |
780 | return p; |
781 | err_free: | |
782 | kfree(p); | |
783 | err: | |
784 | dput(parent); | |
785 | return NULL; | |
786 | } | |
787 | ||
c6d00e63 | 788 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 789 | { |
c6d00e63 TM |
790 | struct nfs4_opendata *p = container_of(kref, |
791 | struct nfs4_opendata, kref); | |
792 | ||
793 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
794 | if (p->state != NULL) |
795 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
796 | nfs4_put_state_owner(p->owner); |
797 | dput(p->dir); | |
31f31db1 | 798 | path_put(&p->path); |
c6d00e63 TM |
799 | kfree(p); |
800 | } | |
801 | ||
802 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
803 | { | |
804 | if (p != NULL) | |
805 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
806 | } |
807 | ||
06f814a3 TM |
808 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
809 | { | |
06f814a3 TM |
810 | int ret; |
811 | ||
06f814a3 | 812 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
813 | return ret; |
814 | } | |
815 | ||
dc0b027d | 816 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
817 | { |
818 | int ret = 0; | |
dc0b027d TM |
819 | |
820 | if (open_mode & O_EXCL) | |
821 | goto out; | |
822 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 | 823 | case FMODE_READ: |
88069f77 TM |
824 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
825 | && state->n_rdonly != 0; | |
6ee41268 TM |
826 | break; |
827 | case FMODE_WRITE: | |
88069f77 TM |
828 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
829 | && state->n_wronly != 0; | |
6ee41268 TM |
830 | break; |
831 | case FMODE_READ|FMODE_WRITE: | |
88069f77 TM |
832 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
833 | && state->n_rdwr != 0; | |
6ee41268 | 834 | } |
dc0b027d | 835 | out: |
6ee41268 TM |
836 | return ret; |
837 | } | |
838 | ||
dc0b027d | 839 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 840 | { |
dc0b027d | 841 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 842 | return 0; |
15c831bf | 843 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 844 | return 0; |
b7391f44 | 845 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
846 | return 1; |
847 | } | |
848 | ||
dc0b027d | 849 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 850 | { |
dc0b027d | 851 | switch (fmode) { |
e7616923 TM |
852 | case FMODE_WRITE: |
853 | state->n_wronly++; | |
854 | break; | |
855 | case FMODE_READ: | |
856 | state->n_rdonly++; | |
857 | break; | |
858 | case FMODE_READ|FMODE_WRITE: | |
859 | state->n_rdwr++; | |
860 | } | |
dc0b027d | 861 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
862 | } |
863 | ||
dc0b027d | 864 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
865 | { |
866 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
867 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
868 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 869 | switch (fmode) { |
003707c7 TM |
870 | case FMODE_READ: |
871 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
872 | break; | |
873 | case FMODE_WRITE: | |
874 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
875 | break; | |
876 | case FMODE_READ|FMODE_WRITE: | |
877 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
878 | } | |
e7616923 TM |
879 | } |
880 | ||
dc0b027d | 881 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 882 | { |
8bda4e4c | 883 | write_seqlock(&state->seqlock); |
dc0b027d | 884 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 885 | write_sequnlock(&state->seqlock); |
003707c7 TM |
886 | } |
887 | ||
dc0b027d | 888 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 889 | { |
8bda4e4c TM |
890 | /* |
891 | * Protect the call to nfs4_state_set_mode_locked and | |
892 | * serialise the stateid update | |
893 | */ | |
894 | write_seqlock(&state->seqlock); | |
003707c7 TM |
895 | if (deleg_stateid != NULL) { |
896 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
897 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
898 | } | |
899 | if (open_stateid != NULL) | |
dc0b027d | 900 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
901 | write_sequnlock(&state->seqlock); |
902 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 903 | update_open_stateflags(state, fmode); |
ec073428 | 904 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
905 | } |
906 | ||
dc0b027d | 907 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
908 | { |
909 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
910 | struct nfs_delegation *deleg_cur; | |
911 | int ret = 0; | |
912 | ||
dc0b027d | 913 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
914 | |
915 | rcu_read_lock(); | |
916 | deleg_cur = rcu_dereference(nfsi->delegation); | |
917 | if (deleg_cur == NULL) | |
918 | goto no_delegation; | |
919 | ||
920 | spin_lock(&deleg_cur->lock); | |
921 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 922 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
923 | goto no_delegation_unlock; |
924 | ||
925 | if (delegation == NULL) | |
926 | delegation = &deleg_cur->stateid; | |
927 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
928 | goto no_delegation_unlock; | |
929 | ||
b7391f44 | 930 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 931 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
932 | ret = 1; |
933 | no_delegation_unlock: | |
934 | spin_unlock(&deleg_cur->lock); | |
935 | no_delegation: | |
936 | rcu_read_unlock(); | |
937 | ||
938 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 939 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
940 | ret = 1; |
941 | } | |
942 | ||
943 | return ret; | |
944 | } | |
945 | ||
946 | ||
dc0b027d | 947 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
948 | { |
949 | struct nfs_delegation *delegation; | |
950 | ||
951 | rcu_read_lock(); | |
952 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 953 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
954 | rcu_read_unlock(); |
955 | return; | |
956 | } | |
957 | rcu_read_unlock(); | |
958 | nfs_inode_return_delegation(inode); | |
959 | } | |
960 | ||
6ee41268 | 961 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
962 | { |
963 | struct nfs4_state *state = opendata->state; | |
964 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
965 | struct nfs_delegation *delegation; | |
dc0b027d TM |
966 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
967 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
968 | nfs4_stateid stateid; |
969 | int ret = -EAGAIN; | |
970 | ||
aac00a8d | 971 | for (;;) { |
dc0b027d | 972 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 973 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
974 | if (can_open_cached(state, fmode, open_mode)) { |
975 | update_open_stateflags(state, fmode); | |
6ee41268 | 976 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
977 | goto out_return_state; |
978 | } | |
979 | spin_unlock(&state->owner->so_lock); | |
980 | } | |
34310430 TM |
981 | rcu_read_lock(); |
982 | delegation = rcu_dereference(nfsi->delegation); | |
983 | if (delegation == NULL || | |
dc0b027d | 984 | !can_open_delegated(delegation, fmode)) { |
34310430 | 985 | rcu_read_unlock(); |
aac00a8d | 986 | break; |
34310430 | 987 | } |
aac00a8d TM |
988 | /* Save the delegation */ |
989 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
990 | rcu_read_unlock(); | |
af22f94a | 991 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
992 | if (ret != 0) |
993 | goto out; | |
994 | ret = -EAGAIN; | |
34310430 TM |
995 | |
996 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 997 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 998 | goto out_return_state; |
aac00a8d | 999 | } |
aac00a8d TM |
1000 | out: |
1001 | return ERR_PTR(ret); | |
1002 | out_return_state: | |
1003 | atomic_inc(&state->count); | |
1004 | return state; | |
1005 | } | |
1006 | ||
24ac23ab TM |
1007 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
1008 | { | |
1009 | struct inode *inode; | |
1010 | struct nfs4_state *state = NULL; | |
003707c7 | 1011 | struct nfs_delegation *delegation; |
1b370bc2 | 1012 | int ret; |
24ac23ab | 1013 | |
aac00a8d | 1014 | if (!data->rpc_done) { |
6ee41268 | 1015 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
1016 | goto out; |
1017 | } | |
1018 | ||
1b370bc2 | 1019 | ret = -EAGAIN; |
24ac23ab | 1020 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 1021 | goto err; |
24ac23ab | 1022 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 1023 | ret = PTR_ERR(inode); |
03f28e3a | 1024 | if (IS_ERR(inode)) |
1b370bc2 TM |
1025 | goto err; |
1026 | ret = -ENOMEM; | |
24ac23ab TM |
1027 | state = nfs4_get_open_state(inode, data->owner); |
1028 | if (state == NULL) | |
1b370bc2 | 1029 | goto err_put_inode; |
549d6ed5 | 1030 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
1031 | int delegation_flags = 0; |
1032 | ||
003707c7 TM |
1033 | rcu_read_lock(); |
1034 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1035 | if (delegation) | |
1036 | delegation_flags = delegation->flags; | |
1037 | rcu_read_unlock(); | |
15c831bf | 1038 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
1039 | nfs_inode_set_delegation(state->inode, |
1040 | data->owner->so_cred, | |
1041 | &data->o_res); | |
1042 | else | |
1043 | nfs_inode_reclaim_delegation(state->inode, | |
1044 | data->owner->so_cred, | |
1045 | &data->o_res); | |
1046 | } | |
34310430 TM |
1047 | |
1048 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 1049 | data->o_arg.fmode); |
24ac23ab | 1050 | iput(inode); |
aac00a8d | 1051 | out: |
24ac23ab | 1052 | return state; |
1b370bc2 TM |
1053 | err_put_inode: |
1054 | iput(inode); | |
1055 | err: | |
1056 | return ERR_PTR(ret); | |
24ac23ab TM |
1057 | } |
1058 | ||
864472e9 TM |
1059 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
1060 | { | |
1061 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1062 | struct nfs_open_context *ctx; | |
1063 | ||
1064 | spin_lock(&state->inode->i_lock); | |
1065 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1066 | if (ctx->state != state) | |
1067 | continue; | |
1068 | get_nfs_open_context(ctx); | |
1069 | spin_unlock(&state->inode->i_lock); | |
1070 | return ctx; | |
1071 | } | |
1072 | spin_unlock(&state->inode->i_lock); | |
1073 | return ERR_PTR(-ENOENT); | |
1074 | } | |
1075 | ||
6f220ed5 TM |
1076 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
1077 | { | |
1078 | struct nfs4_opendata *opendata; | |
1079 | ||
8535b2be | 1080 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS); |
6f220ed5 TM |
1081 | if (opendata == NULL) |
1082 | return ERR_PTR(-ENOMEM); | |
1083 | opendata->state = state; | |
1084 | atomic_inc(&state->count); | |
1085 | return opendata; | |
1086 | } | |
1087 | ||
dc0b027d | 1088 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 1089 | { |
2ced46c2 | 1090 | struct nfs4_state *newstate; |
864472e9 TM |
1091 | int ret; |
1092 | ||
dc0b027d TM |
1093 | opendata->o_arg.open_flags = 0; |
1094 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
1095 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
1096 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1097 | nfs4_init_opendata_res(opendata); | |
b257957e | 1098 | ret = _nfs4_recover_proc_open(opendata); |
864472e9 TM |
1099 | if (ret != 0) |
1100 | return ret; | |
2ced46c2 | 1101 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1102 | if (IS_ERR(newstate)) |
1103 | return PTR_ERR(newstate); | |
dc0b027d | 1104 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 1105 | *res = newstate; |
864472e9 TM |
1106 | return 0; |
1107 | } | |
1108 | ||
1109 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1110 | { | |
864472e9 | 1111 | struct nfs4_state *newstate; |
864472e9 TM |
1112 | int ret; |
1113 | ||
1114 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1115 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1116 | smp_rmb(); |
1117 | if (state->n_rdwr != 0) { | |
b0ed9dbc | 1118 | clear_bit(NFS_O_RDWR_STATE, &state->flags); |
2ced46c2 | 1119 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1120 | if (ret != 0) |
1121 | return ret; | |
2ced46c2 TM |
1122 | if (newstate != state) |
1123 | return -ESTALE; | |
864472e9 TM |
1124 | } |
1125 | if (state->n_wronly != 0) { | |
b0ed9dbc | 1126 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
2ced46c2 | 1127 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1128 | if (ret != 0) |
1129 | return ret; | |
2ced46c2 TM |
1130 | if (newstate != state) |
1131 | return -ESTALE; | |
864472e9 TM |
1132 | } |
1133 | if (state->n_rdonly != 0) { | |
b0ed9dbc | 1134 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
2ced46c2 | 1135 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1136 | if (ret != 0) |
1137 | return ret; | |
2ced46c2 TM |
1138 | if (newstate != state) |
1139 | return -ESTALE; | |
864472e9 | 1140 | } |
1ac7e2fd TM |
1141 | /* |
1142 | * We may have performed cached opens for all three recoveries. | |
1143 | * Check if we need to update the current stateid. | |
1144 | */ | |
1145 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1146 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1147 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1148 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1149 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1150 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1151 | } |
864472e9 TM |
1152 | return 0; |
1153 | } | |
1154 | ||
1da177e4 LT |
1155 | /* |
1156 | * OPEN_RECLAIM: | |
1157 | * reclaim state on the server after a reboot. | |
1da177e4 | 1158 | */ |
539cd03a | 1159 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1160 | { |
1ac7e2fd | 1161 | struct nfs_delegation *delegation; |
864472e9 | 1162 | struct nfs4_opendata *opendata; |
dc0b027d | 1163 | fmode_t delegation_type = 0; |
1da177e4 LT |
1164 | int status; |
1165 | ||
6f220ed5 TM |
1166 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1167 | if (IS_ERR(opendata)) | |
1168 | return PTR_ERR(opendata); | |
864472e9 TM |
1169 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1170 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1171 | rcu_read_lock(); |
1172 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1173 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1174 | delegation_type = delegation->type; |
1ac7e2fd | 1175 | rcu_read_unlock(); |
864472e9 TM |
1176 | opendata->o_arg.u.delegation_type = delegation_type; |
1177 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1178 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1179 | return status; |
1180 | } | |
1181 | ||
539cd03a | 1182 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1183 | { |
1184 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1185 | struct nfs4_exception exception = { }; | |
1186 | int err; | |
1187 | do { | |
539cd03a | 1188 | err = _nfs4_do_open_reclaim(ctx, state); |
168667c4 | 1189 | if (err != -NFS4ERR_DELAY) |
202b50dc TM |
1190 | break; |
1191 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1192 | } while (exception.retry); |
1193 | return err; | |
1194 | } | |
1195 | ||
864472e9 TM |
1196 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1197 | { | |
1198 | struct nfs_open_context *ctx; | |
1199 | int ret; | |
1200 | ||
1201 | ctx = nfs4_state_find_open_context(state); | |
1202 | if (IS_ERR(ctx)) | |
1203 | return PTR_ERR(ctx); | |
539cd03a | 1204 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1205 | put_nfs_open_context(ctx); |
1206 | return ret; | |
1207 | } | |
1208 | ||
13437e12 | 1209 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1210 | { |
e56e0b78 | 1211 | struct nfs4_opendata *opendata; |
864472e9 | 1212 | int ret; |
1da177e4 | 1213 | |
6f220ed5 TM |
1214 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1215 | if (IS_ERR(opendata)) | |
1216 | return PTR_ERR(opendata); | |
e56e0b78 | 1217 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1218 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1219 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1220 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1221 | nfs4_opendata_put(opendata); |
864472e9 | 1222 | return ret; |
1da177e4 LT |
1223 | } |
1224 | ||
13437e12 | 1225 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1226 | { |
1227 | struct nfs4_exception exception = { }; | |
539cd03a | 1228 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1229 | int err; |
1230 | do { | |
13437e12 | 1231 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1232 | switch (err) { |
1233 | case 0: | |
965b5d67 TM |
1234 | case -ENOENT: |
1235 | case -ESTALE: | |
1236 | goto out; | |
bcfa49f6 RL |
1237 | case -NFS4ERR_BADSESSION: |
1238 | case -NFS4ERR_BADSLOT: | |
1239 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1240 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1241 | case -NFS4ERR_DEADSESSION: | |
1242 | nfs4_schedule_state_recovery( | |
1243 | server->nfs_client); | |
1244 | goto out; | |
1da177e4 LT |
1245 | case -NFS4ERR_STALE_CLIENTID: |
1246 | case -NFS4ERR_STALE_STATEID: | |
1247 | case -NFS4ERR_EXPIRED: | |
1248 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1249 | nfs4_schedule_state_recovery(server->nfs_client); |
965b5d67 TM |
1250 | goto out; |
1251 | case -ERESTARTSYS: | |
1252 | /* | |
1253 | * The show must go on: exit, but mark the | |
1254 | * stateid as needing recovery. | |
1255 | */ | |
1256 | case -NFS4ERR_ADMIN_REVOKED: | |
1257 | case -NFS4ERR_BAD_STATEID: | |
1258 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
168667c4 TM |
1259 | case -EKEYEXPIRED: |
1260 | /* | |
1261 | * User RPCSEC_GSS context has expired. | |
1262 | * We cannot recover this stateid now, so | |
1263 | * skip it and allow recovery thread to | |
1264 | * proceed. | |
1265 | */ | |
965b5d67 TM |
1266 | case -ENOMEM: |
1267 | err = 0; | |
1268 | goto out; | |
1da177e4 LT |
1269 | } |
1270 | err = nfs4_handle_exception(server, err, &exception); | |
1271 | } while (exception.retry); | |
965b5d67 | 1272 | out: |
1da177e4 LT |
1273 | return err; |
1274 | } | |
1275 | ||
cdd4e68b TM |
1276 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1277 | { | |
1278 | struct nfs4_opendata *data = calldata; | |
1279 | ||
1280 | data->rpc_status = task->tk_status; | |
26e976a8 | 1281 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1282 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1283 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1284 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1285 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1286 | data->rpc_done = 1; |
26e976a8 | 1287 | } |
cdd4e68b TM |
1288 | } |
1289 | ||
1290 | static void nfs4_open_confirm_release(void *calldata) | |
1291 | { | |
1292 | struct nfs4_opendata *data = calldata; | |
1293 | struct nfs4_state *state = NULL; | |
1294 | ||
1295 | /* If this request hasn't been cancelled, do nothing */ | |
1296 | if (data->cancelled == 0) | |
1297 | goto out_free; | |
1298 | /* In case of error, no cleanup! */ | |
3e309914 | 1299 | if (!data->rpc_done) |
cdd4e68b | 1300 | goto out_free; |
cdd4e68b | 1301 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1302 | if (!IS_ERR(state)) |
dc0b027d | 1303 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1304 | out_free: |
c6d00e63 | 1305 | nfs4_opendata_put(data); |
cdd4e68b TM |
1306 | } |
1307 | ||
1308 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1309 | .rpc_call_done = nfs4_open_confirm_done, |
1310 | .rpc_release = nfs4_open_confirm_release, | |
1311 | }; | |
1312 | ||
1313 | /* | |
1314 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1315 | */ | |
1316 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1317 | { | |
1318 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1319 | struct rpc_task *task; | |
5138fde0 TM |
1320 | struct rpc_message msg = { |
1321 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1322 | .rpc_argp = &data->c_arg, | |
1323 | .rpc_resp = &data->c_res, | |
1324 | .rpc_cred = data->owner->so_cred, | |
1325 | }; | |
c970aa85 TM |
1326 | struct rpc_task_setup task_setup_data = { |
1327 | .rpc_client = server->client, | |
5138fde0 | 1328 | .rpc_message = &msg, |
c970aa85 TM |
1329 | .callback_ops = &nfs4_open_confirm_ops, |
1330 | .callback_data = data, | |
101070ca | 1331 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1332 | .flags = RPC_TASK_ASYNC, |
1333 | }; | |
1da177e4 LT |
1334 | int status; |
1335 | ||
c6d00e63 | 1336 | kref_get(&data->kref); |
3e309914 TM |
1337 | data->rpc_done = 0; |
1338 | data->rpc_status = 0; | |
5138fde0 | 1339 | data->timestamp = jiffies; |
c970aa85 | 1340 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1341 | if (IS_ERR(task)) |
cdd4e68b | 1342 | return PTR_ERR(task); |
cdd4e68b TM |
1343 | status = nfs4_wait_for_completion_rpc_task(task); |
1344 | if (status != 0) { | |
1345 | data->cancelled = 1; | |
1346 | smp_wmb(); | |
1347 | } else | |
1348 | status = data->rpc_status; | |
e6b3c4db | 1349 | rpc_put_task(task); |
1da177e4 LT |
1350 | return status; |
1351 | } | |
1352 | ||
24ac23ab | 1353 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1354 | { |
24ac23ab TM |
1355 | struct nfs4_opendata *data = calldata; |
1356 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1357 | |
24ac23ab TM |
1358 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1359 | return; | |
aac00a8d TM |
1360 | /* |
1361 | * Check if we still need to send an OPEN call, or if we can use | |
1362 | * a delegation instead. | |
1363 | */ | |
1364 | if (data->state != NULL) { | |
1365 | struct nfs_delegation *delegation; | |
1366 | ||
dc0b027d | 1367 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1368 | goto out_no_action; |
aac00a8d TM |
1369 | rcu_read_lock(); |
1370 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1371 | if (delegation != NULL && | |
15c831bf | 1372 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1373 | rcu_read_unlock(); |
6ee41268 | 1374 | goto out_no_action; |
aac00a8d TM |
1375 | } |
1376 | rcu_read_unlock(); | |
1377 | } | |
24ac23ab | 1378 | /* Update sequence id. */ |
9f958ab8 | 1379 | data->o_arg.id = sp->so_owner_id.id; |
1f0e890d | 1380 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; |
6f220ed5 | 1381 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1382 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1383 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1384 | } | |
26e976a8 | 1385 | data->timestamp = jiffies; |
035168ab | 1386 | if (nfs4_setup_sequence(data->o_arg.server, |
d898528c AA |
1387 | &data->o_arg.seq_args, |
1388 | &data->o_res.seq_res, 1, task)) | |
1389 | return; | |
5138fde0 | 1390 | rpc_call_start(task); |
6ee41268 TM |
1391 | return; |
1392 | out_no_action: | |
1393 | task->tk_action = NULL; | |
1394 | ||
24ac23ab | 1395 | } |
1da177e4 | 1396 | |
b257957e AB |
1397 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
1398 | { | |
1399 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
1400 | nfs4_open_prepare(task, calldata); | |
1401 | } | |
1402 | ||
24ac23ab TM |
1403 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1404 | { | |
1405 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1406 | |
24ac23ab | 1407 | data->rpc_status = task->tk_status; |
d898528c | 1408 | |
14516c3a TM |
1409 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
1410 | return; | |
d898528c | 1411 | |
24ac23ab TM |
1412 | if (task->tk_status == 0) { |
1413 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1414 | case S_IFREG: |
1415 | break; | |
1416 | case S_IFLNK: | |
24ac23ab | 1417 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1418 | break; |
1419 | case S_IFDIR: | |
24ac23ab | 1420 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1421 | break; |
1422 | default: | |
24ac23ab | 1423 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1424 | } |
26e976a8 | 1425 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1426 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1427 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1428 | } |
3e309914 | 1429 | data->rpc_done = 1; |
24ac23ab | 1430 | } |
6f926b5b | 1431 | |
24ac23ab TM |
1432 | static void nfs4_open_release(void *calldata) |
1433 | { | |
1434 | struct nfs4_opendata *data = calldata; | |
1435 | struct nfs4_state *state = NULL; | |
1436 | ||
1437 | /* If this request hasn't been cancelled, do nothing */ | |
1438 | if (data->cancelled == 0) | |
1439 | goto out_free; | |
1440 | /* In case of error, no cleanup! */ | |
3e309914 | 1441 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1442 | goto out_free; |
1443 | /* In case we need an open_confirm, no cleanup! */ | |
1444 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1445 | goto out_free; | |
24ac23ab | 1446 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1447 | if (!IS_ERR(state)) |
dc0b027d | 1448 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1449 | out_free: |
c6d00e63 | 1450 | nfs4_opendata_put(data); |
24ac23ab TM |
1451 | } |
1452 | ||
1453 | static const struct rpc_call_ops nfs4_open_ops = { | |
1454 | .rpc_call_prepare = nfs4_open_prepare, | |
1455 | .rpc_call_done = nfs4_open_done, | |
1456 | .rpc_release = nfs4_open_release, | |
1457 | }; | |
1458 | ||
b257957e AB |
1459 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
1460 | .rpc_call_prepare = nfs4_recover_open_prepare, | |
1461 | .rpc_call_done = nfs4_open_done, | |
1462 | .rpc_release = nfs4_open_release, | |
1463 | }; | |
1464 | ||
1465 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
24ac23ab TM |
1466 | { |
1467 | struct inode *dir = data->dir->d_inode; | |
1468 | struct nfs_server *server = NFS_SERVER(dir); | |
1469 | struct nfs_openargs *o_arg = &data->o_arg; | |
1470 | struct nfs_openres *o_res = &data->o_res; | |
1471 | struct rpc_task *task; | |
5138fde0 TM |
1472 | struct rpc_message msg = { |
1473 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1474 | .rpc_argp = o_arg, | |
1475 | .rpc_resp = o_res, | |
1476 | .rpc_cred = data->owner->so_cred, | |
1477 | }; | |
c970aa85 TM |
1478 | struct rpc_task_setup task_setup_data = { |
1479 | .rpc_client = server->client, | |
5138fde0 | 1480 | .rpc_message = &msg, |
c970aa85 TM |
1481 | .callback_ops = &nfs4_open_ops, |
1482 | .callback_data = data, | |
101070ca | 1483 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1484 | .flags = RPC_TASK_ASYNC, |
1485 | }; | |
24ac23ab TM |
1486 | int status; |
1487 | ||
c6d00e63 | 1488 | kref_get(&data->kref); |
3e309914 TM |
1489 | data->rpc_done = 0; |
1490 | data->rpc_status = 0; | |
2ced46c2 | 1491 | data->cancelled = 0; |
b257957e AB |
1492 | if (isrecover) |
1493 | task_setup_data.callback_ops = &nfs4_recover_open_ops; | |
c970aa85 | 1494 | task = rpc_run_task(&task_setup_data); |
b257957e AB |
1495 | if (IS_ERR(task)) |
1496 | return PTR_ERR(task); | |
1497 | status = nfs4_wait_for_completion_rpc_task(task); | |
1498 | if (status != 0) { | |
1499 | data->cancelled = 1; | |
1500 | smp_wmb(); | |
1501 | } else | |
1502 | status = data->rpc_status; | |
1503 | rpc_put_task(task); | |
1504 | ||
1505 | return status; | |
1506 | } | |
1507 | ||
1508 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1509 | { | |
1510 | struct inode *dir = data->dir->d_inode; | |
1511 | struct nfs_openres *o_res = &data->o_res; | |
1512 | int status; | |
1513 | ||
1514 | status = nfs4_run_open_task(data, 1); | |
1515 | if (status != 0 || !data->rpc_done) | |
1516 | return status; | |
1517 | ||
1518 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1519 | ||
1520 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1521 | status = _nfs4_proc_open_confirm(data); | |
1522 | if (status != 0) | |
1523 | return status; | |
1524 | } | |
1525 | ||
1526 | return status; | |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1531 | */ | |
1532 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1533 | { | |
1534 | struct inode *dir = data->dir->d_inode; | |
1535 | struct nfs_server *server = NFS_SERVER(dir); | |
1536 | struct nfs_openargs *o_arg = &data->o_arg; | |
1537 | struct nfs_openres *o_res = &data->o_res; | |
1538 | int status; | |
1539 | ||
1540 | status = nfs4_run_open_task(data, 0); | |
3e309914 | 1541 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1542 | return status; |
1543 | ||
56ae19f3 TM |
1544 | if (o_arg->open_flags & O_CREAT) { |
1545 | update_changeattr(dir, &o_res->cinfo); | |
1546 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1547 | } else | |
1548 | nfs_refresh_inode(dir, o_res->dir_attr); | |
0df5dd4a TM |
1549 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
1550 | server->caps &= ~NFS_CAP_POSIX_LOCK; | |
1da177e4 | 1551 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1552 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1553 | if (status != 0) |
24ac23ab | 1554 | return status; |
1da177e4 LT |
1555 | } |
1556 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1557 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1558 | return 0; |
1da177e4 LT |
1559 | } |
1560 | ||
10afec90 | 1561 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1562 | { |
7539bbab | 1563 | struct nfs_client *clp = server->nfs_client; |
a78cb57a | 1564 | unsigned int loop; |
6b30954e | 1565 | int ret; |
58d9714a | 1566 | |
a78cb57a | 1567 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
65de872e | 1568 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e | 1569 | if (ret != 0) |
a78cb57a | 1570 | break; |
e598d843 TM |
1571 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1572 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1573 | break; |
58d9714a | 1574 | nfs4_schedule_state_recovery(clp); |
a78cb57a | 1575 | ret = -EIO; |
6b30954e | 1576 | } |
a78cb57a | 1577 | return ret; |
58d9714a TM |
1578 | } |
1579 | ||
1da177e4 LT |
1580 | /* |
1581 | * OPEN_EXPIRED: | |
1582 | * reclaim state on the server after a network partition. | |
1583 | * Assumes caller holds the appropriate lock | |
1584 | */ | |
539cd03a | 1585 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1586 | { |
e56e0b78 | 1587 | struct nfs4_opendata *opendata; |
864472e9 | 1588 | int ret; |
1da177e4 | 1589 | |
6f220ed5 TM |
1590 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1591 | if (IS_ERR(opendata)) | |
1592 | return PTR_ERR(opendata); | |
864472e9 | 1593 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1594 | if (ret == -ESTALE) |
539cd03a | 1595 | d_drop(ctx->path.dentry); |
c6d00e63 | 1596 | nfs4_opendata_put(opendata); |
864472e9 | 1597 | return ret; |
1da177e4 LT |
1598 | } |
1599 | ||
a9ed2e25 | 1600 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1601 | { |
539cd03a | 1602 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1603 | struct nfs4_exception exception = { }; |
1604 | int err; | |
1605 | ||
1606 | do { | |
539cd03a | 1607 | err = _nfs4_open_expired(ctx, state); |
a9ed2e25 TM |
1608 | switch (err) { |
1609 | default: | |
1610 | goto out; | |
1611 | case -NFS4ERR_GRACE: | |
1612 | case -NFS4ERR_DELAY: | |
1613 | nfs4_handle_exception(server, err, &exception); | |
1614 | err = 0; | |
1615 | } | |
202b50dc | 1616 | } while (exception.retry); |
a9ed2e25 | 1617 | out: |
202b50dc TM |
1618 | return err; |
1619 | } | |
1620 | ||
1da177e4 LT |
1621 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1622 | { | |
1da177e4 | 1623 | struct nfs_open_context *ctx; |
864472e9 | 1624 | int ret; |
1da177e4 | 1625 | |
864472e9 TM |
1626 | ctx = nfs4_state_find_open_context(state); |
1627 | if (IS_ERR(ctx)) | |
1628 | return PTR_ERR(ctx); | |
539cd03a | 1629 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1630 | put_nfs_open_context(ctx); |
1631 | return ret; | |
1da177e4 LT |
1632 | } |
1633 | ||
aa53ed54 JL |
1634 | /* |
1635 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1636 | * fields corresponding to attributes that were used to store the verifier. | |
1637 | * Make sure we clobber those fields in the later setattr call | |
1638 | */ | |
1639 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1640 | { | |
1641 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1642 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1643 | sattr->ia_valid |= ATTR_ATIME; | |
1644 | ||
1645 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1646 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1647 | sattr->ia_valid |= ATTR_MTIME; | |
1648 | } | |
1649 | ||
1da177e4 | 1650 | /* |
24ac23ab | 1651 | * Returns a referenced nfs4_state |
1da177e4 | 1652 | */ |
dc0b027d | 1653 | 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 |
1654 | { |
1655 | struct nfs4_state_owner *sp; | |
1656 | struct nfs4_state *state = NULL; | |
1657 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1658 | struct nfs4_opendata *opendata; |
aac00a8d | 1659 | int status; |
1da177e4 LT |
1660 | |
1661 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1662 | status = -ENOMEM; |
1663 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1664 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1665 | goto out_err; | |
1666 | } | |
58d9714a TM |
1667 | status = nfs4_recover_expired_lease(server); |
1668 | if (status != 0) | |
b4454fe1 | 1669 | goto err_put_state_owner; |
aac00a8d | 1670 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1671 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1672 | status = -ENOMEM; |
8535b2be | 1673 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL); |
e56e0b78 | 1674 | if (opendata == NULL) |
95d35cb4 | 1675 | goto err_put_state_owner; |
1da177e4 | 1676 | |
aac00a8d TM |
1677 | if (path->dentry->d_inode != NULL) |
1678 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1679 | ||
24ac23ab | 1680 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1681 | if (status != 0) |
c6d00e63 | 1682 | goto err_opendata_put; |
1da177e4 | 1683 | |
24ac23ab | 1684 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1685 | status = PTR_ERR(state); |
1686 | if (IS_ERR(state)) | |
c6d00e63 | 1687 | goto err_opendata_put; |
0df5dd4a | 1688 | if (server->caps & NFS_CAP_POSIX_LOCK) |
8e469ebd | 1689 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
0ab64e0e TM |
1690 | |
1691 | if (opendata->o_arg.open_flags & O_EXCL) { | |
1692 | nfs4_exclusive_attrset(opendata, sattr); | |
1693 | ||
1694 | nfs_fattr_init(opendata->o_res.f_attr); | |
1695 | status = nfs4_do_setattr(state->inode, cred, | |
1696 | opendata->o_res.f_attr, sattr, | |
1697 | state); | |
1698 | if (status == 0) | |
1699 | nfs_setattr_update_inode(state->inode, sattr); | |
1700 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); | |
1701 | } | |
c6d00e63 | 1702 | nfs4_opendata_put(opendata); |
1da177e4 | 1703 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1704 | *res = state; |
1705 | return 0; | |
c6d00e63 TM |
1706 | err_opendata_put: |
1707 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1708 | err_put_state_owner: |
1709 | nfs4_put_state_owner(sp); | |
1da177e4 | 1710 | out_err: |
1da177e4 LT |
1711 | *res = NULL; |
1712 | return status; | |
1713 | } | |
1714 | ||
1715 | ||
dc0b027d | 1716 | 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 |
1717 | { |
1718 | struct nfs4_exception exception = { }; | |
1719 | struct nfs4_state *res; | |
1720 | int status; | |
1721 | ||
1722 | do { | |
dc0b027d | 1723 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1724 | if (status == 0) |
1725 | break; | |
1726 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1727 | * book-keeping w.r.t. state-changing operations | |
1728 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1729 | * It is actually a sign of a bug on the client or on the server. | |
1730 | * | |
1731 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1732 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1733 | * have unhashed the old state_owner for us, and that we can |
1734 | * therefore safely retry using a new one. We should still warn | |
1735 | * the user though... | |
1736 | */ | |
1737 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1738 | printk(KERN_WARNING "NFS: v4 server %s " |
1739 | " returned a bad sequence-id error!\n", | |
1740 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1741 | exception.retry = 1; |
1742 | continue; | |
1743 | } | |
550f5747 TM |
1744 | /* |
1745 | * BAD_STATEID on OPEN means that the server cancelled our | |
1746 | * state before it received the OPEN_CONFIRM. | |
1747 | * Recover by retrying the request as per the discussion | |
1748 | * on Page 181 of RFC3530. | |
1749 | */ | |
1750 | if (status == -NFS4ERR_BAD_STATEID) { | |
1751 | exception.retry = 1; | |
1752 | continue; | |
1753 | } | |
aac00a8d TM |
1754 | if (status == -EAGAIN) { |
1755 | /* We must have found a delegation */ | |
1756 | exception.retry = 1; | |
1757 | continue; | |
1758 | } | |
1da177e4 LT |
1759 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1760 | status, &exception)); | |
1761 | } while (exception.retry); | |
1762 | return res; | |
1763 | } | |
1764 | ||
659bfcd6 TM |
1765 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1766 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1767 | struct nfs4_state *state) | |
1da177e4 | 1768 | { |
3e4f6290 | 1769 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1770 | struct nfs_setattrargs arg = { |
3e4f6290 | 1771 | .fh = NFS_FH(inode), |
1da177e4 LT |
1772 | .iap = sattr, |
1773 | .server = server, | |
1774 | .bitmask = server->attr_bitmask, | |
1775 | }; | |
1776 | struct nfs_setattrres res = { | |
1777 | .fattr = fattr, | |
1778 | .server = server, | |
1779 | }; | |
1780 | struct rpc_message msg = { | |
659bfcd6 TM |
1781 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1782 | .rpc_argp = &arg, | |
1783 | .rpc_resp = &res, | |
1784 | .rpc_cred = cred, | |
1da177e4 | 1785 | }; |
26e976a8 | 1786 | unsigned long timestamp = jiffies; |
65e4308d | 1787 | int status; |
1da177e4 | 1788 | |
0e574af1 | 1789 | nfs_fattr_init(fattr); |
1da177e4 | 1790 | |
3e4f6290 TM |
1791 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1792 | /* Use that stateid */ | |
1793 | } else if (state != NULL) { | |
77041ed9 | 1794 | nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); |
08e9eac4 | 1795 | } else |
1da177e4 LT |
1796 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1797 | ||
cccef3b9 | 1798 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1799 | if (status == 0 && state != NULL) |
1800 | renew_lease(server, timestamp); | |
65e4308d | 1801 | return status; |
1da177e4 LT |
1802 | } |
1803 | ||
659bfcd6 TM |
1804 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1805 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1806 | struct nfs4_state *state) | |
1da177e4 | 1807 | { |
3e4f6290 | 1808 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1809 | struct nfs4_exception exception = { }; |
1810 | int err; | |
1811 | do { | |
1812 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1813 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1814 | &exception); |
1815 | } while (exception.retry); | |
1816 | return err; | |
1817 | } | |
1818 | ||
1819 | struct nfs4_closedata { | |
4a35bd41 | 1820 | struct path path; |
1da177e4 LT |
1821 | struct inode *inode; |
1822 | struct nfs4_state *state; | |
1823 | struct nfs_closeargs arg; | |
1824 | struct nfs_closeres res; | |
516a6af6 | 1825 | struct nfs_fattr fattr; |
26e976a8 | 1826 | unsigned long timestamp; |
1da177e4 LT |
1827 | }; |
1828 | ||
963d8fe5 | 1829 | static void nfs4_free_closedata(void *data) |
9512135d | 1830 | { |
963d8fe5 TM |
1831 | struct nfs4_closedata *calldata = data; |
1832 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1833 | |
1834 | nfs4_put_open_state(calldata->state); | |
1835 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1836 | nfs4_put_state_owner(sp); |
31f31db1 | 1837 | path_put(&calldata->path); |
9512135d TM |
1838 | kfree(calldata); |
1839 | } | |
1840 | ||
88069f77 TM |
1841 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
1842 | fmode_t fmode) | |
1843 | { | |
1844 | spin_lock(&state->owner->so_lock); | |
1845 | if (!(fmode & FMODE_READ)) | |
1846 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1847 | if (!(fmode & FMODE_WRITE)) | |
1848 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1849 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1850 | spin_unlock(&state->owner->so_lock); | |
1851 | } | |
1852 | ||
963d8fe5 | 1853 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1854 | { |
963d8fe5 | 1855 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1856 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1857 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1858 | ||
14516c3a TM |
1859 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
1860 | return; | |
1da177e4 LT |
1861 | /* hmm. we are done with the inode, and in the process of freeing |
1862 | * the state_owner. we keep this around to process errors | |
1863 | */ | |
1da177e4 LT |
1864 | switch (task->tk_status) { |
1865 | case 0: | |
45328c35 | 1866 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1867 | renew_lease(server, calldata->timestamp); |
88069f77 TM |
1868 | nfs4_close_clear_stateid_flags(state, |
1869 | calldata->arg.fmode); | |
1da177e4 LT |
1870 | break; |
1871 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1872 | case -NFS4ERR_OLD_STATEID: |
1873 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1874 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1875 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1876 | break; |
1da177e4 | 1877 | default: |
72211dbe TM |
1878 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
1879 | rpc_restart_call_prepare(task); | |
1da177e4 | 1880 | } |
72211dbe | 1881 | nfs_release_seqid(calldata->arg.seqid); |
516a6af6 | 1882 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1883 | } |
1884 | ||
4ce70ada | 1885 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1886 | { |
4ce70ada | 1887 | struct nfs4_closedata *calldata = data; |
9512135d | 1888 | struct nfs4_state *state = calldata->state; |
88069f77 | 1889 | int call_close = 0; |
9512135d | 1890 | |
963d8fe5 | 1891 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1892 | return; |
003707c7 | 1893 | |
88069f77 TM |
1894 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
1895 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
4cecb76f | 1896 | spin_lock(&state->owner->so_lock); |
003707c7 | 1897 | /* Calculate the change in open mode */ |
e7616923 | 1898 | if (state->n_rdwr == 0) { |
003707c7 | 1899 | if (state->n_rdonly == 0) { |
88069f77 TM |
1900 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
1901 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1902 | calldata->arg.fmode &= ~FMODE_READ; | |
003707c7 TM |
1903 | } |
1904 | if (state->n_wronly == 0) { | |
88069f77 TM |
1905 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
1906 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1907 | calldata->arg.fmode &= ~FMODE_WRITE; | |
003707c7 | 1908 | } |
e7616923 | 1909 | } |
4cecb76f | 1910 | spin_unlock(&state->owner->so_lock); |
88069f77 TM |
1911 | |
1912 | if (!call_close) { | |
963d8fe5 TM |
1913 | /* Note: exit _without_ calling nfs4_close_done */ |
1914 | task->tk_action = NULL; | |
9512135d TM |
1915 | return; |
1916 | } | |
88069f77 TM |
1917 | |
1918 | if (calldata->arg.fmode == 0) | |
1919 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
1920 | ||
516a6af6 | 1921 | nfs_fattr_init(calldata->res.fattr); |
26e976a8 | 1922 | calldata->timestamp = jiffies; |
035168ab | 1923 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
19ddab06 AA |
1924 | &calldata->arg.seq_args, &calldata->res.seq_res, |
1925 | 1, task)) | |
1926 | return; | |
5138fde0 | 1927 | rpc_call_start(task); |
1da177e4 LT |
1928 | } |
1929 | ||
963d8fe5 | 1930 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1931 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1932 | .rpc_call_done = nfs4_close_done, |
1933 | .rpc_release = nfs4_free_closedata, | |
1934 | }; | |
1935 | ||
1da177e4 LT |
1936 | /* |
1937 | * It is possible for data to be read/written from a mem-mapped file | |
1938 | * after the sys_close call (which hits the vfs layer as a flush). | |
1939 | * This means that we can't safely call nfsv4 close on a file until | |
1940 | * the inode is cleared. This in turn means that we are not good | |
1941 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1942 | * share state even when we are done with one of the three share | |
1943 | * stateid's in the inode. | |
1944 | * | |
1945 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1946 | */ | |
8535b2be | 1947 | int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) |
1da177e4 | 1948 | { |
4a35bd41 | 1949 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1950 | struct nfs4_closedata *calldata; |
b39e625b TM |
1951 | struct nfs4_state_owner *sp = state->owner; |
1952 | struct rpc_task *task; | |
5138fde0 TM |
1953 | struct rpc_message msg = { |
1954 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1955 | .rpc_cred = state->owner->so_cred, | |
1956 | }; | |
c970aa85 TM |
1957 | struct rpc_task_setup task_setup_data = { |
1958 | .rpc_client = server->client, | |
5138fde0 | 1959 | .rpc_message = &msg, |
c970aa85 | 1960 | .callback_ops = &nfs4_close_ops, |
101070ca | 1961 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1962 | .flags = RPC_TASK_ASYNC, |
1963 | }; | |
9512135d | 1964 | int status = -ENOMEM; |
1da177e4 | 1965 | |
8535b2be | 1966 | calldata = kzalloc(sizeof(*calldata), gfp_mask); |
1da177e4 | 1967 | if (calldata == NULL) |
9512135d | 1968 | goto out; |
4a35bd41 | 1969 | calldata->inode = state->inode; |
1da177e4 | 1970 | calldata->state = state; |
4a35bd41 | 1971 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1972 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1973 | /* Serialization for the sequence id */ |
8535b2be | 1974 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
9512135d TM |
1975 | if (calldata->arg.seqid == NULL) |
1976 | goto out_free_calldata; | |
dc0b027d | 1977 | calldata->arg.fmode = 0; |
a65318bf | 1978 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1979 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1980 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1981 | calldata->res.server = server; |
f6948697 AV |
1982 | path_get(path); |
1983 | calldata->path = *path; | |
9512135d | 1984 | |
5138fde0 TM |
1985 | msg.rpc_argp = &calldata->arg, |
1986 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1987 | task_setup_data.callback_data = calldata; |
1988 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1989 | if (IS_ERR(task)) |
1990 | return PTR_ERR(task); | |
a49c3c77 TM |
1991 | status = 0; |
1992 | if (wait) | |
1993 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1994 | rpc_put_task(task); |
a49c3c77 | 1995 | return status; |
9512135d TM |
1996 | out_free_calldata: |
1997 | kfree(calldata); | |
1998 | out: | |
b39e625b TM |
1999 | nfs4_put_open_state(state); |
2000 | nfs4_put_state_owner(sp); | |
9512135d | 2001 | return status; |
1da177e4 LT |
2002 | } |
2003 | ||
2b484297 | 2004 | static struct inode * |
cd9a1c0e | 2005 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) |
1da177e4 | 2006 | { |
1da177e4 | 2007 | struct nfs4_state *state; |
1da177e4 | 2008 | |
565277f6 | 2009 | /* Protect against concurrent sillydeletes */ |
cd9a1c0e | 2010 | state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred); |
f46e0bd3 TM |
2011 | if (IS_ERR(state)) |
2012 | return ERR_CAST(state); | |
cd9a1c0e | 2013 | ctx->state = state; |
f46e0bd3 | 2014 | return igrab(state->inode); |
1da177e4 LT |
2015 | } |
2016 | ||
1185a552 | 2017 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
7fe5c398 TM |
2018 | { |
2019 | if (ctx->state == NULL) | |
2020 | return; | |
2021 | if (is_sync) | |
2022 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
2023 | else | |
2024 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
2025 | } | |
1da177e4 LT |
2026 | |
2027 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2028 | { | |
43652ad5 BH |
2029 | struct nfs4_server_caps_arg args = { |
2030 | .fhandle = fhandle, | |
2031 | }; | |
1da177e4 LT |
2032 | struct nfs4_server_caps_res res = {}; |
2033 | struct rpc_message msg = { | |
2034 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 2035 | .rpc_argp = &args, |
1da177e4 LT |
2036 | .rpc_resp = &res, |
2037 | }; | |
2038 | int status; | |
2039 | ||
cccef3b9 | 2040 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2041 | if (status == 0) { |
2042 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
62ab460c TM |
2043 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
2044 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2045 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2046 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2047 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
1da177e4 LT |
2048 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
2049 | server->caps |= NFS_CAP_ACLS; | |
2050 | if (res.has_links != 0) | |
2051 | server->caps |= NFS_CAP_HARDLINKS; | |
2052 | if (res.has_symlinks != 0) | |
2053 | server->caps |= NFS_CAP_SYMLINKS; | |
62ab460c TM |
2054 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
2055 | server->caps |= NFS_CAP_FILEID; | |
2056 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2057 | server->caps |= NFS_CAP_MODE; | |
2058 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2059 | server->caps |= NFS_CAP_NLINK; | |
2060 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2061 | server->caps |= NFS_CAP_OWNER; | |
2062 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2063 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2064 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2065 | server->caps |= NFS_CAP_ATIME; | |
2066 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2067 | server->caps |= NFS_CAP_CTIME; | |
2068 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2069 | server->caps |= NFS_CAP_MTIME; | |
2070 | ||
a65318bf TM |
2071 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
2072 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2073 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
2074 | server->acl_bitmask = res.acl_bitmask; |
2075 | } | |
cccef3b9 | 2076 | |
1da177e4 LT |
2077 | return status; |
2078 | } | |
2079 | ||
55a97593 | 2080 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
2081 | { |
2082 | struct nfs4_exception exception = { }; | |
2083 | int err; | |
2084 | do { | |
2085 | err = nfs4_handle_exception(server, | |
2086 | _nfs4_server_capabilities(server, fhandle), | |
2087 | &exception); | |
2088 | } while (exception.retry); | |
2089 | return err; | |
2090 | } | |
2091 | ||
2092 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2093 | struct nfs_fsinfo *info) | |
2094 | { | |
1da177e4 LT |
2095 | struct nfs4_lookup_root_arg args = { |
2096 | .bitmask = nfs4_fattr_bitmap, | |
2097 | }; | |
2098 | struct nfs4_lookup_res res = { | |
2099 | .server = server, | |
0e574af1 | 2100 | .fattr = info->fattr, |
1da177e4 LT |
2101 | .fh = fhandle, |
2102 | }; | |
2103 | struct rpc_message msg = { | |
2104 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2105 | .rpc_argp = &args, | |
2106 | .rpc_resp = &res, | |
2107 | }; | |
008f55d0 | 2108 | |
0e574af1 | 2109 | nfs_fattr_init(info->fattr); |
fccba804 | 2110 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2111 | } |
2112 | ||
2113 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2114 | struct nfs_fsinfo *info) | |
2115 | { | |
2116 | struct nfs4_exception exception = { }; | |
2117 | int err; | |
2118 | do { | |
2119 | err = nfs4_handle_exception(server, | |
2120 | _nfs4_lookup_root(server, fhandle, info), | |
2121 | &exception); | |
2122 | } while (exception.retry); | |
2123 | return err; | |
2124 | } | |
2125 | ||
54ceac45 DH |
2126 | /* |
2127 | * get the file handle for the "/" directory on the server | |
2128 | */ | |
1da177e4 | 2129 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 2130 | struct nfs_fsinfo *info) |
1da177e4 | 2131 | { |
1da177e4 LT |
2132 | int status; |
2133 | ||
1da177e4 | 2134 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2135 | if (status == 0) |
2136 | status = nfs4_server_capabilities(server, fhandle); | |
2137 | if (status == 0) | |
2138 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2139 | return nfs4_map_errors(status); |
1da177e4 LT |
2140 | } |
2141 | ||
6b97fd3d MN |
2142 | /* |
2143 | * Get locations and (maybe) other attributes of a referral. | |
2144 | * Note that we'll actually follow the referral later when | |
2145 | * we detect fsid mismatch in inode revalidation | |
2146 | */ | |
56659e99 | 2147 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2148 | { |
2149 | int status = -ENOMEM; | |
2150 | struct page *page = NULL; | |
2151 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2152 | |
2153 | page = alloc_page(GFP_KERNEL); | |
2154 | if (page == NULL) | |
2155 | goto out; | |
2156 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2157 | if (locations == NULL) | |
2158 | goto out; | |
2159 | ||
c228fd3a | 2160 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2161 | if (status != 0) |
2162 | goto out; | |
2163 | /* Make sure server returned a different fsid for the referral */ | |
2164 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2165 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2166 | status = -EIO; |
2167 | goto out; | |
2168 | } | |
2169 | ||
2170 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2171 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2172 | if (!fattr->mode) | |
2173 | fattr->mode = S_IFDIR; | |
2174 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2175 | out: | |
2176 | if (page) | |
2177 | __free_page(page); | |
5d7ca35a | 2178 | kfree(locations); |
6b97fd3d MN |
2179 | return status; |
2180 | } | |
2181 | ||
1da177e4 LT |
2182 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2183 | { | |
2184 | struct nfs4_getattr_arg args = { | |
2185 | .fh = fhandle, | |
2186 | .bitmask = server->attr_bitmask, | |
2187 | }; | |
2188 | struct nfs4_getattr_res res = { | |
2189 | .fattr = fattr, | |
2190 | .server = server, | |
2191 | }; | |
2192 | struct rpc_message msg = { | |
2193 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2194 | .rpc_argp = &args, | |
2195 | .rpc_resp = &res, | |
2196 | }; | |
2197 | ||
0e574af1 | 2198 | nfs_fattr_init(fattr); |
cccef3b9 | 2199 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2203 | { | |
2204 | struct nfs4_exception exception = { }; | |
2205 | int err; | |
2206 | do { | |
2207 | err = nfs4_handle_exception(server, | |
2208 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2209 | &exception); | |
2210 | } while (exception.retry); | |
2211 | return err; | |
2212 | } | |
2213 | ||
2214 | /* | |
2215 | * The file is not closed if it is opened due to the a request to change | |
2216 | * the size of the file. The open call will not be needed once the | |
2217 | * VFS layer lookup-intents are implemented. | |
2218 | * | |
2219 | * Close is called when the inode is destroyed. | |
2220 | * If we haven't opened the file for O_WRONLY, we | |
2221 | * need to in the size_change case to obtain a stateid. | |
2222 | * | |
2223 | * Got race? | |
2224 | * Because OPEN is always done by name in nfsv4, it is | |
2225 | * possible that we opened a different file by the same | |
2226 | * name. We can recognize this race condition, but we | |
2227 | * can't do anything about it besides returning an error. | |
2228 | * | |
2229 | * This will be fixed with VFS changes (lookup-intent). | |
2230 | */ | |
2231 | static int | |
2232 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2233 | struct iattr *sattr) | |
2234 | { | |
08e9eac4 | 2235 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2236 | struct rpc_cred *cred = NULL; |
d530838b | 2237 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2238 | int status; |
2239 | ||
0e574af1 | 2240 | nfs_fattr_init(fattr); |
1da177e4 | 2241 | |
d530838b | 2242 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2243 | if (sattr->ia_valid & ATTR_FILE) { |
2244 | struct nfs_open_context *ctx; | |
2245 | ||
2246 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2247 | if (ctx) { |
2248 | cred = ctx->cred; | |
2249 | state = ctx->state; | |
2250 | } | |
659bfcd6 | 2251 | } |
08e9eac4 | 2252 | |
659bfcd6 | 2253 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2254 | if (status == 0) |
2255 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2256 | return status; |
2257 | } | |
2258 | ||
56659e99 TM |
2259 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2260 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2261 | struct nfs_fattr *fattr) |
2262 | { | |
2263 | int status; | |
2264 | struct nfs4_lookup_arg args = { | |
2265 | .bitmask = server->attr_bitmask, | |
2266 | .dir_fh = dirfh, | |
2267 | .name = name, | |
2268 | }; | |
2269 | struct nfs4_lookup_res res = { | |
2270 | .server = server, | |
2271 | .fattr = fattr, | |
2272 | .fh = fhandle, | |
2273 | }; | |
2274 | struct rpc_message msg = { | |
2275 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2276 | .rpc_argp = &args, | |
2277 | .rpc_resp = &res, | |
2278 | }; | |
2279 | ||
2280 | nfs_fattr_init(fattr); | |
2281 | ||
2282 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2283 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2284 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2285 | return status; |
2286 | } | |
2287 | ||
2288 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2289 | struct qstr *name, struct nfs_fh *fhandle, | |
2290 | struct nfs_fattr *fattr) | |
2291 | { | |
2292 | struct nfs4_exception exception = { }; | |
2293 | int err; | |
2294 | do { | |
4e56e082 TM |
2295 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2296 | /* FIXME: !!!! */ | |
2297 | if (err == -NFS4ERR_MOVED) { | |
2298 | err = -EREMOTE; | |
2299 | break; | |
2300 | } | |
2301 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2302 | } while (exception.retry); |
2303 | return err; | |
2304 | } | |
2305 | ||
56659e99 | 2306 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2307 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2308 | { | |
4e56e082 | 2309 | int status; |
1da177e4 LT |
2310 | |
2311 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2312 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2313 | if (status == -NFS4ERR_MOVED) |
2314 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2315 | dprintk("NFS reply lookup: %d\n", status); |
2316 | return status; | |
2317 | } | |
2318 | ||
2319 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2320 | { | |
2321 | struct nfs4_exception exception = { }; | |
2322 | int err; | |
2323 | do { | |
2324 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2325 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2326 | &exception); | |
2327 | } while (exception.retry); | |
2328 | return err; | |
2329 | } | |
2330 | ||
2331 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2332 | { | |
76b32999 | 2333 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2334 | struct nfs4_accessargs args = { |
2335 | .fh = NFS_FH(inode), | |
76b32999 TM |
2336 | .bitmask = server->attr_bitmask, |
2337 | }; | |
2338 | struct nfs4_accessres res = { | |
2339 | .server = server, | |
1da177e4 | 2340 | }; |
1da177e4 LT |
2341 | struct rpc_message msg = { |
2342 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2343 | .rpc_argp = &args, | |
2344 | .rpc_resp = &res, | |
2345 | .rpc_cred = entry->cred, | |
2346 | }; | |
2347 | int mode = entry->mask; | |
2348 | int status; | |
2349 | ||
2350 | /* | |
2351 | * Determine which access bits we want to ask for... | |
2352 | */ | |
2353 | if (mode & MAY_READ) | |
2354 | args.access |= NFS4_ACCESS_READ; | |
2355 | if (S_ISDIR(inode->i_mode)) { | |
2356 | if (mode & MAY_WRITE) | |
2357 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2358 | if (mode & MAY_EXEC) | |
2359 | args.access |= NFS4_ACCESS_LOOKUP; | |
2360 | } else { | |
2361 | if (mode & MAY_WRITE) | |
2362 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2363 | if (mode & MAY_EXEC) | |
2364 | args.access |= NFS4_ACCESS_EXECUTE; | |
2365 | } | |
c407d41a TM |
2366 | |
2367 | res.fattr = nfs_alloc_fattr(); | |
2368 | if (res.fattr == NULL) | |
2369 | return -ENOMEM; | |
2370 | ||
cccef3b9 | 2371 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2372 | if (!status) { |
2373 | entry->mask = 0; | |
2374 | if (res.access & NFS4_ACCESS_READ) | |
2375 | entry->mask |= MAY_READ; | |
2376 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2377 | entry->mask |= MAY_WRITE; | |
2378 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2379 | entry->mask |= MAY_EXEC; | |
c407d41a | 2380 | nfs_refresh_inode(inode, res.fattr); |
1da177e4 | 2381 | } |
c407d41a | 2382 | nfs_free_fattr(res.fattr); |
1da177e4 LT |
2383 | return status; |
2384 | } | |
2385 | ||
2386 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2387 | { | |
2388 | struct nfs4_exception exception = { }; | |
2389 | int err; | |
2390 | do { | |
2391 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2392 | _nfs4_proc_access(inode, entry), | |
2393 | &exception); | |
2394 | } while (exception.retry); | |
2395 | return err; | |
2396 | } | |
2397 | ||
2398 | /* | |
2399 | * TODO: For the time being, we don't try to get any attributes | |
2400 | * along with any of the zero-copy operations READ, READDIR, | |
2401 | * READLINK, WRITE. | |
2402 | * | |
2403 | * In the case of the first three, we want to put the GETATTR | |
2404 | * after the read-type operation -- this is because it is hard | |
2405 | * to predict the length of a GETATTR response in v4, and thus | |
2406 | * align the READ data correctly. This means that the GETATTR | |
2407 | * may end up partially falling into the page cache, and we should | |
2408 | * shift it into the 'tail' of the xdr_buf before processing. | |
2409 | * To do this efficiently, we need to know the total length | |
2410 | * of data received, which doesn't seem to be available outside | |
2411 | * of the RPC layer. | |
2412 | * | |
2413 | * In the case of WRITE, we also want to put the GETATTR after | |
2414 | * the operation -- in this case because we want to make sure | |
2415 | * we get the post-operation mtime and size. This means that | |
2416 | * we can't use xdr_encode_pages() as written: we need a variant | |
2417 | * of it which would leave room in the 'tail' iovec. | |
2418 | * | |
2419 | * Both of these changes to the XDR layer would in fact be quite | |
2420 | * minor, but I decided to leave them for a subsequent patch. | |
2421 | */ | |
2422 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2423 | unsigned int pgbase, unsigned int pglen) | |
2424 | { | |
2425 | struct nfs4_readlink args = { | |
2426 | .fh = NFS_FH(inode), | |
2427 | .pgbase = pgbase, | |
2428 | .pglen = pglen, | |
2429 | .pages = &page, | |
2430 | }; | |
f50c7000 | 2431 | struct nfs4_readlink_res res; |
1da177e4 LT |
2432 | struct rpc_message msg = { |
2433 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2434 | .rpc_argp = &args, | |
f50c7000 | 2435 | .rpc_resp = &res, |
1da177e4 LT |
2436 | }; |
2437 | ||
cccef3b9 | 2438 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2439 | } |
2440 | ||
2441 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2442 | unsigned int pgbase, unsigned int pglen) | |
2443 | { | |
2444 | struct nfs4_exception exception = { }; | |
2445 | int err; | |
2446 | do { | |
2447 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2448 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2449 | &exception); | |
2450 | } while (exception.retry); | |
2451 | return err; | |
2452 | } | |
2453 | ||
1da177e4 LT |
2454 | /* |
2455 | * Got race? | |
2456 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2457 | * Until then, this create/open method is prone to inefficiency and race | |
2458 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2459 | * placed on the wire. | |
2460 | * | |
2461 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2462 | * The file will be opened again in the subsequent VFS open call | |
2463 | * (nfs4_proc_file_open). | |
2464 | * | |
2465 | * The open for read will just hang around to be used by any process that | |
2466 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2467 | */ | |
2468 | ||
2469 | static int | |
2470 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
c0204fd2 | 2471 | int flags, struct nfs_open_context *ctx) |
1da177e4 | 2472 | { |
c0204fd2 | 2473 | struct path my_path = { |
ad389da7 TM |
2474 | .dentry = dentry, |
2475 | }; | |
c0204fd2 | 2476 | struct path *path = &my_path; |
1da177e4 | 2477 | struct nfs4_state *state; |
c0204fd2 TM |
2478 | struct rpc_cred *cred = NULL; |
2479 | fmode_t fmode = 0; | |
1da177e4 LT |
2480 | int status = 0; |
2481 | ||
c0204fd2 TM |
2482 | if (ctx != NULL) { |
2483 | cred = ctx->cred; | |
2484 | path = &ctx->path; | |
2485 | fmode = ctx->mode; | |
1da177e4 | 2486 | } |
c0204fd2 | 2487 | state = nfs4_do_open(dir, path, fmode, flags, sattr, cred); |
d4d9cdcb | 2488 | d_drop(dentry); |
1da177e4 LT |
2489 | if (IS_ERR(state)) { |
2490 | status = PTR_ERR(state); | |
c0204fd2 | 2491 | goto out; |
1da177e4 | 2492 | } |
d4d9cdcb | 2493 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2494 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
c0204fd2 TM |
2495 | if (ctx != NULL) |
2496 | ctx->state = state; | |
02a913a7 | 2497 | else |
c0204fd2 | 2498 | nfs4_close_sync(path, state, fmode); |
1da177e4 LT |
2499 | out: |
2500 | return status; | |
2501 | } | |
2502 | ||
2503 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2504 | { | |
16e42959 | 2505 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2506 | struct nfs_removeargs args = { |
1da177e4 | 2507 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2508 | .name.len = name->len, |
2509 | .name.name = name->name, | |
16e42959 TM |
2510 | .bitmask = server->attr_bitmask, |
2511 | }; | |
4fdc17b2 | 2512 | struct nfs_removeres res = { |
16e42959 | 2513 | .server = server, |
1da177e4 | 2514 | }; |
1da177e4 | 2515 | struct rpc_message msg = { |
4fdc17b2 TM |
2516 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2517 | .rpc_argp = &args, | |
2518 | .rpc_resp = &res, | |
1da177e4 | 2519 | }; |
d346890b TM |
2520 | int status = -ENOMEM; |
2521 | ||
2522 | res.dir_attr = nfs_alloc_fattr(); | |
2523 | if (res.dir_attr == NULL) | |
2524 | goto out; | |
1da177e4 | 2525 | |
cccef3b9 | 2526 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2527 | if (status == 0) { |
2528 | update_changeattr(dir, &res.cinfo); | |
d346890b | 2529 | nfs_post_op_update_inode(dir, res.dir_attr); |
16e42959 | 2530 | } |
d346890b TM |
2531 | nfs_free_fattr(res.dir_attr); |
2532 | out: | |
1da177e4 LT |
2533 | return status; |
2534 | } | |
2535 | ||
2536 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2537 | { | |
2538 | struct nfs4_exception exception = { }; | |
2539 | int err; | |
2540 | do { | |
2541 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2542 | _nfs4_proc_remove(dir, name), | |
2543 | &exception); | |
2544 | } while (exception.retry); | |
2545 | return err; | |
2546 | } | |
2547 | ||
e4eff1a6 | 2548 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2549 | { |
e4eff1a6 TM |
2550 | struct nfs_server *server = NFS_SERVER(dir); |
2551 | struct nfs_removeargs *args = msg->rpc_argp; | |
2552 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2553 | |
a65318bf | 2554 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2555 | res->server = server; |
dfb4f309 | 2556 | res->seq_res.sr_slot = NULL; |
1da177e4 | 2557 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2558 | } |
2559 | ||
e4eff1a6 | 2560 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2561 | { |
e4eff1a6 TM |
2562 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2563 | ||
14516c3a TM |
2564 | if (!nfs4_sequence_done(task, &res->seq_res)) |
2565 | return 0; | |
9e33bed5 | 2566 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2567 | return 0; |
2568 | update_changeattr(dir, &res->cinfo); | |
d346890b | 2569 | nfs_post_op_update_inode(dir, res->dir_attr); |
e4eff1a6 | 2570 | return 1; |
1da177e4 LT |
2571 | } |
2572 | ||
d3d4152a JL |
2573 | static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) |
2574 | { | |
2575 | struct nfs_server *server = NFS_SERVER(dir); | |
2576 | struct nfs_renameargs *arg = msg->rpc_argp; | |
2577 | struct nfs_renameres *res = msg->rpc_resp; | |
2578 | ||
2579 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; | |
2580 | arg->bitmask = server->attr_bitmask; | |
2581 | res->server = server; | |
2582 | } | |
2583 | ||
2584 | static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, | |
2585 | struct inode *new_dir) | |
2586 | { | |
2587 | struct nfs_renameres *res = task->tk_msg.rpc_resp; | |
2588 | ||
2589 | if (!nfs4_sequence_done(task, &res->seq_res)) | |
2590 | return 0; | |
2591 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
2592 | return 0; | |
2593 | ||
2594 | update_changeattr(old_dir, &res->old_cinfo); | |
2595 | nfs_post_op_update_inode(old_dir, res->old_fattr); | |
2596 | update_changeattr(new_dir, &res->new_cinfo); | |
2597 | nfs_post_op_update_inode(new_dir, res->new_fattr); | |
2598 | return 1; | |
2599 | } | |
2600 | ||
1da177e4 LT |
2601 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, |
2602 | struct inode *new_dir, struct qstr *new_name) | |
2603 | { | |
6caf2c82 | 2604 | struct nfs_server *server = NFS_SERVER(old_dir); |
920769f0 | 2605 | struct nfs_renameargs arg = { |
1da177e4 LT |
2606 | .old_dir = NFS_FH(old_dir), |
2607 | .new_dir = NFS_FH(new_dir), | |
2608 | .old_name = old_name, | |
2609 | .new_name = new_name, | |
6caf2c82 TM |
2610 | .bitmask = server->attr_bitmask, |
2611 | }; | |
e8582a8b | 2612 | struct nfs_renameres res = { |
6caf2c82 | 2613 | .server = server, |
1da177e4 | 2614 | }; |
1da177e4 LT |
2615 | struct rpc_message msg = { |
2616 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2617 | .rpc_argp = &arg, | |
2618 | .rpc_resp = &res, | |
2619 | }; | |
011fff72 | 2620 | int status = -ENOMEM; |
1da177e4 | 2621 | |
011fff72 TM |
2622 | res.old_fattr = nfs_alloc_fattr(); |
2623 | res.new_fattr = nfs_alloc_fattr(); | |
2624 | if (res.old_fattr == NULL || res.new_fattr == NULL) | |
2625 | goto out; | |
1da177e4 | 2626 | |
011fff72 | 2627 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2628 | if (!status) { |
2629 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2630 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2631 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2632 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 | 2633 | } |
011fff72 TM |
2634 | out: |
2635 | nfs_free_fattr(res.new_fattr); | |
2636 | nfs_free_fattr(res.old_fattr); | |
1da177e4 LT |
2637 | return status; |
2638 | } | |
2639 | ||
2640 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2641 | struct inode *new_dir, struct qstr *new_name) | |
2642 | { | |
2643 | struct nfs4_exception exception = { }; | |
2644 | int err; | |
2645 | do { | |
2646 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2647 | _nfs4_proc_rename(old_dir, old_name, | |
2648 | new_dir, new_name), | |
2649 | &exception); | |
2650 | } while (exception.retry); | |
2651 | return err; | |
2652 | } | |
2653 | ||
2654 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2655 | { | |
91ba2eee | 2656 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2657 | struct nfs4_link_arg arg = { |
2658 | .fh = NFS_FH(inode), | |
2659 | .dir_fh = NFS_FH(dir), | |
2660 | .name = name, | |
91ba2eee TM |
2661 | .bitmask = server->attr_bitmask, |
2662 | }; | |
91ba2eee TM |
2663 | struct nfs4_link_res res = { |
2664 | .server = server, | |
1da177e4 | 2665 | }; |
1da177e4 LT |
2666 | struct rpc_message msg = { |
2667 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2668 | .rpc_argp = &arg, | |
91ba2eee | 2669 | .rpc_resp = &res, |
1da177e4 | 2670 | }; |
136f2627 TM |
2671 | int status = -ENOMEM; |
2672 | ||
2673 | res.fattr = nfs_alloc_fattr(); | |
2674 | res.dir_attr = nfs_alloc_fattr(); | |
2675 | if (res.fattr == NULL || res.dir_attr == NULL) | |
2676 | goto out; | |
1da177e4 | 2677 | |
cccef3b9 | 2678 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2679 | if (!status) { |
2680 | update_changeattr(dir, &res.cinfo); | |
2681 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2682 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2683 | } |
136f2627 TM |
2684 | out: |
2685 | nfs_free_fattr(res.dir_attr); | |
2686 | nfs_free_fattr(res.fattr); | |
1da177e4 LT |
2687 | return status; |
2688 | } | |
2689 | ||
2690 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2691 | { | |
2692 | struct nfs4_exception exception = { }; | |
2693 | int err; | |
2694 | do { | |
2695 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2696 | _nfs4_proc_link(inode, dir, name), | |
2697 | &exception); | |
2698 | } while (exception.retry); | |
2699 | return err; | |
2700 | } | |
2701 | ||
57dc9a57 TM |
2702 | struct nfs4_createdata { |
2703 | struct rpc_message msg; | |
2704 | struct nfs4_create_arg arg; | |
2705 | struct nfs4_create_res res; | |
2706 | struct nfs_fh fh; | |
2707 | struct nfs_fattr fattr; | |
2708 | struct nfs_fattr dir_fattr; | |
2709 | }; | |
2710 | ||
2711 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2712 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2713 | { | |
2714 | struct nfs4_createdata *data; | |
2715 | ||
2716 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2717 | if (data != NULL) { | |
2718 | struct nfs_server *server = NFS_SERVER(dir); | |
2719 | ||
2720 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2721 | data->msg.rpc_argp = &data->arg; | |
2722 | data->msg.rpc_resp = &data->res; | |
2723 | data->arg.dir_fh = NFS_FH(dir); | |
2724 | data->arg.server = server; | |
2725 | data->arg.name = name; | |
2726 | data->arg.attrs = sattr; | |
2727 | data->arg.ftype = ftype; | |
2728 | data->arg.bitmask = server->attr_bitmask; | |
2729 | data->res.server = server; | |
2730 | data->res.fh = &data->fh; | |
2731 | data->res.fattr = &data->fattr; | |
2732 | data->res.dir_fattr = &data->dir_fattr; | |
2733 | nfs_fattr_init(data->res.fattr); | |
2734 | nfs_fattr_init(data->res.dir_fattr); | |
2735 | } | |
2736 | return data; | |
2737 | } | |
2738 | ||
2739 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2740 | { | |
cccef3b9 AA |
2741 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2742 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2743 | if (status == 0) { |
2744 | update_changeattr(dir, &data->res.dir_cinfo); | |
2745 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2746 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2747 | } | |
2748 | return status; | |
2749 | } | |
2750 | ||
2751 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2752 | { | |
2753 | kfree(data); | |
2754 | } | |
2755 | ||
4f390c15 | 2756 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2757 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2758 | { |
57dc9a57 TM |
2759 | struct nfs4_createdata *data; |
2760 | int status = -ENAMETOOLONG; | |
1da177e4 | 2761 | |
94a6d753 | 2762 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2763 | goto out; |
4f390c15 | 2764 | |
57dc9a57 TM |
2765 | status = -ENOMEM; |
2766 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2767 | if (data == NULL) | |
2768 | goto out; | |
2769 | ||
2770 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2771 | data->arg.u.symlink.pages = &page; | |
2772 | data->arg.u.symlink.len = len; | |
1da177e4 | 2773 | |
57dc9a57 TM |
2774 | status = nfs4_do_create(dir, dentry, data); |
2775 | ||
2776 | nfs4_free_createdata(data); | |
2777 | out: | |
1da177e4 LT |
2778 | return status; |
2779 | } | |
2780 | ||
4f390c15 | 2781 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2782 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2783 | { |
2784 | struct nfs4_exception exception = { }; | |
2785 | int err; | |
2786 | do { | |
2787 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2788 | _nfs4_proc_symlink(dir, dentry, page, |
2789 | len, sattr), | |
1da177e4 LT |
2790 | &exception); |
2791 | } while (exception.retry); | |
2792 | return err; | |
2793 | } | |
2794 | ||
2795 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2796 | struct iattr *sattr) | |
2797 | { | |
57dc9a57 TM |
2798 | struct nfs4_createdata *data; |
2799 | int status = -ENOMEM; | |
1da177e4 | 2800 | |
57dc9a57 TM |
2801 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2802 | if (data == NULL) | |
2803 | goto out; | |
2804 | ||
2805 | status = nfs4_do_create(dir, dentry, data); | |
2806 | ||
2807 | nfs4_free_createdata(data); | |
2808 | out: | |
1da177e4 LT |
2809 | return status; |
2810 | } | |
2811 | ||
2812 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2813 | struct iattr *sattr) | |
2814 | { | |
2815 | struct nfs4_exception exception = { }; | |
2816 | int err; | |
2817 | do { | |
2818 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2819 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2820 | &exception); | |
2821 | } while (exception.retry); | |
2822 | return err; | |
2823 | } | |
2824 | ||
2825 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
56e4ebf8 | 2826 | u64 cookie, struct page **pages, unsigned int count, int plus) |
1da177e4 LT |
2827 | { |
2828 | struct inode *dir = dentry->d_inode; | |
2829 | struct nfs4_readdir_arg args = { | |
2830 | .fh = NFS_FH(dir), | |
56e4ebf8 | 2831 | .pages = pages, |
1da177e4 LT |
2832 | .pgbase = 0, |
2833 | .count = count, | |
96d25e53 | 2834 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
82f2e547 | 2835 | .plus = plus, |
1da177e4 LT |
2836 | }; |
2837 | struct nfs4_readdir_res res; | |
2838 | struct rpc_message msg = { | |
2839 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2840 | .rpc_argp = &args, | |
2841 | .rpc_resp = &res, | |
2842 | .rpc_cred = cred, | |
2843 | }; | |
2844 | int status; | |
2845 | ||
3110ff80 | 2846 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2847 | dentry->d_parent->d_name.name, |
2848 | dentry->d_name.name, | |
2849 | (unsigned long long)cookie); | |
1da177e4 LT |
2850 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2851 | res.pgbase = args.pgbase; | |
cccef3b9 | 2852 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2853 | if (status == 0) |
2854 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2855 | |
2856 | nfs_invalidate_atime(dir); | |
2857 | ||
3110ff80 | 2858 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2859 | return status; |
2860 | } | |
2861 | ||
2862 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
56e4ebf8 | 2863 | u64 cookie, struct page **pages, unsigned int count, int plus) |
1da177e4 LT |
2864 | { |
2865 | struct nfs4_exception exception = { }; | |
2866 | int err; | |
2867 | do { | |
2868 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2869 | _nfs4_proc_readdir(dentry, cred, cookie, | |
56e4ebf8 | 2870 | pages, count, plus), |
1da177e4 LT |
2871 | &exception); |
2872 | } while (exception.retry); | |
2873 | return err; | |
2874 | } | |
2875 | ||
2876 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2877 | struct iattr *sattr, dev_t rdev) | |
2878 | { | |
57dc9a57 TM |
2879 | struct nfs4_createdata *data; |
2880 | int mode = sattr->ia_mode; | |
2881 | int status = -ENOMEM; | |
1da177e4 LT |
2882 | |
2883 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2884 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2885 | |
2886 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2887 | if (data == NULL) | |
2888 | goto out; | |
2889 | ||
1da177e4 | 2890 | if (S_ISFIFO(mode)) |
57dc9a57 | 2891 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2892 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2893 | data->arg.ftype = NF4BLK; |
2894 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2895 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2896 | } |
2897 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2898 | data->arg.ftype = NF4CHR; |
2899 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2900 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2901 | } |
1da177e4 | 2902 | |
57dc9a57 TM |
2903 | status = nfs4_do_create(dir, dentry, data); |
2904 | ||
2905 | nfs4_free_createdata(data); | |
2906 | out: | |
1da177e4 LT |
2907 | return status; |
2908 | } | |
2909 | ||
2910 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2911 | struct iattr *sattr, dev_t rdev) | |
2912 | { | |
2913 | struct nfs4_exception exception = { }; | |
2914 | int err; | |
2915 | do { | |
2916 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2917 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2918 | &exception); | |
2919 | } while (exception.retry); | |
2920 | return err; | |
2921 | } | |
2922 | ||
2923 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2924 | struct nfs_fsstat *fsstat) | |
2925 | { | |
2926 | struct nfs4_statfs_arg args = { | |
2927 | .fh = fhandle, | |
2928 | .bitmask = server->attr_bitmask, | |
2929 | }; | |
24ad148a BH |
2930 | struct nfs4_statfs_res res = { |
2931 | .fsstat = fsstat, | |
2932 | }; | |
1da177e4 LT |
2933 | struct rpc_message msg = { |
2934 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2935 | .rpc_argp = &args, | |
24ad148a | 2936 | .rpc_resp = &res, |
1da177e4 LT |
2937 | }; |
2938 | ||
0e574af1 | 2939 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2940 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2941 | } |
2942 | ||
2943 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2944 | { | |
2945 | struct nfs4_exception exception = { }; | |
2946 | int err; | |
2947 | do { | |
2948 | err = nfs4_handle_exception(server, | |
2949 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2950 | &exception); | |
2951 | } while (exception.retry); | |
2952 | return err; | |
2953 | } | |
2954 | ||
2955 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2956 | struct nfs_fsinfo *fsinfo) | |
2957 | { | |
2958 | struct nfs4_fsinfo_arg args = { | |
2959 | .fh = fhandle, | |
2960 | .bitmask = server->attr_bitmask, | |
2961 | }; | |
3dda5e43 BH |
2962 | struct nfs4_fsinfo_res res = { |
2963 | .fsinfo = fsinfo, | |
2964 | }; | |
1da177e4 LT |
2965 | struct rpc_message msg = { |
2966 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2967 | .rpc_argp = &args, | |
3dda5e43 | 2968 | .rpc_resp = &res, |
1da177e4 LT |
2969 | }; |
2970 | ||
cccef3b9 | 2971 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2972 | } |
2973 | ||
2974 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2975 | { | |
2976 | struct nfs4_exception exception = { }; | |
2977 | int err; | |
2978 | ||
2979 | do { | |
2980 | err = nfs4_handle_exception(server, | |
2981 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2982 | &exception); | |
2983 | } while (exception.retry); | |
2984 | return err; | |
2985 | } | |
2986 | ||
2987 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2988 | { | |
0e574af1 | 2989 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2990 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2991 | } | |
2992 | ||
2993 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2994 | struct nfs_pathconf *pathconf) | |
2995 | { | |
2996 | struct nfs4_pathconf_arg args = { | |
2997 | .fh = fhandle, | |
2998 | .bitmask = server->attr_bitmask, | |
2999 | }; | |
d45b2989 BH |
3000 | struct nfs4_pathconf_res res = { |
3001 | .pathconf = pathconf, | |
3002 | }; | |
1da177e4 LT |
3003 | struct rpc_message msg = { |
3004 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
3005 | .rpc_argp = &args, | |
d45b2989 | 3006 | .rpc_resp = &res, |
1da177e4 LT |
3007 | }; |
3008 | ||
3009 | /* None of the pathconf attributes are mandatory to implement */ | |
3010 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
3011 | memset(pathconf, 0, sizeof(*pathconf)); | |
3012 | return 0; | |
3013 | } | |
3014 | ||
0e574af1 | 3015 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 3016 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
3017 | } |
3018 | ||
3019 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3020 | struct nfs_pathconf *pathconf) | |
3021 | { | |
3022 | struct nfs4_exception exception = { }; | |
3023 | int err; | |
3024 | ||
3025 | do { | |
3026 | err = nfs4_handle_exception(server, | |
3027 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
3028 | &exception); | |
3029 | } while (exception.retry); | |
3030 | return err; | |
3031 | } | |
3032 | ||
ec06c096 | 3033 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 3034 | { |
ec06c096 | 3035 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3036 | |
f11c88af AA |
3037 | dprintk("--> %s\n", __func__); |
3038 | ||
14516c3a TM |
3039 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3040 | return -EAGAIN; | |
f11c88af | 3041 | |
9e33bed5 | 3042 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
0110ee15 | 3043 | nfs_restart_rpc(task, server->nfs_client); |
ec06c096 | 3044 | return -EAGAIN; |
1da177e4 | 3045 | } |
8850df99 TM |
3046 | |
3047 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 3048 | if (task->tk_status > 0) |
ec06c096 TM |
3049 | renew_lease(server, data->timestamp); |
3050 | return 0; | |
1da177e4 LT |
3051 | } |
3052 | ||
bdc7f021 | 3053 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 3054 | { |
1da177e4 | 3055 | data->timestamp = jiffies; |
bdc7f021 | 3056 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
3057 | } |
3058 | ||
788e7a89 | 3059 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3060 | { |
1da177e4 LT |
3061 | struct inode *inode = data->inode; |
3062 | ||
14516c3a TM |
3063 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3064 | return -EAGAIN; | |
def6ed7e | 3065 | |
9e33bed5 | 3066 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
0110ee15 | 3067 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3068 | return -EAGAIN; |
1da177e4 | 3069 | } |
4f9838c7 | 3070 | if (task->tk_status >= 0) { |
1da177e4 | 3071 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 3072 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 3073 | } |
788e7a89 | 3074 | return 0; |
1da177e4 LT |
3075 | } |
3076 | ||
bdc7f021 | 3077 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3078 | { |
bdc7f021 TM |
3079 | struct nfs_server *server = NFS_SERVER(data->inode); |
3080 | ||
a65318bf | 3081 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3082 | data->res.server = server; |
1da177e4 LT |
3083 | data->timestamp = jiffies; |
3084 | ||
bdc7f021 | 3085 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
3086 | } |
3087 | ||
788e7a89 | 3088 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3089 | { |
1da177e4 LT |
3090 | struct inode *inode = data->inode; |
3091 | ||
14516c3a TM |
3092 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3093 | return -EAGAIN; | |
3094 | ||
9e33bed5 | 3095 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
0110ee15 | 3096 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3097 | return -EAGAIN; |
1da177e4 | 3098 | } |
9e08a3c5 | 3099 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 3100 | return 0; |
1da177e4 LT |
3101 | } |
3102 | ||
bdc7f021 | 3103 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3104 | { |
788e7a89 | 3105 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3106 | |
a65318bf | 3107 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3108 | data->res.server = server; |
bdc7f021 | 3109 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
3110 | } |
3111 | ||
9bc4e3ca CL |
3112 | struct nfs4_renewdata { |
3113 | struct nfs_client *client; | |
3114 | unsigned long timestamp; | |
3115 | }; | |
3116 | ||
1da177e4 LT |
3117 | /* |
3118 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3119 | * standalone procedure for queueing an asynchronous RENEW. | |
3120 | */ | |
9bc4e3ca | 3121 | static void nfs4_renew_release(void *calldata) |
dc96aef9 | 3122 | { |
9bc4e3ca CL |
3123 | struct nfs4_renewdata *data = calldata; |
3124 | struct nfs_client *clp = data->client; | |
dc96aef9 | 3125 | |
0851de06 AB |
3126 | if (atomic_read(&clp->cl_count) > 1) |
3127 | nfs4_schedule_state_renewal(clp); | |
3128 | nfs_put_client(clp); | |
9bc4e3ca | 3129 | kfree(data); |
dc96aef9 AB |
3130 | } |
3131 | ||
9bc4e3ca | 3132 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
1da177e4 | 3133 | { |
9bc4e3ca CL |
3134 | struct nfs4_renewdata *data = calldata; |
3135 | struct nfs_client *clp = data->client; | |
3136 | unsigned long timestamp = data->timestamp; | |
1da177e4 LT |
3137 | |
3138 | if (task->tk_status < 0) { | |
95baa25c TM |
3139 | /* Unless we're shutting down, schedule state recovery! */ |
3140 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
3141 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
3142 | return; |
3143 | } | |
452e9352 | 3144 | do_renew_lease(clp, timestamp); |
1da177e4 LT |
3145 | } |
3146 | ||
963d8fe5 TM |
3147 | static const struct rpc_call_ops nfs4_renew_ops = { |
3148 | .rpc_call_done = nfs4_renew_done, | |
dc96aef9 | 3149 | .rpc_release = nfs4_renew_release, |
963d8fe5 TM |
3150 | }; |
3151 | ||
adfa6f98 | 3152 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3153 | { |
3154 | struct rpc_message msg = { | |
3155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3156 | .rpc_argp = clp, | |
b4454fe1 | 3157 | .rpc_cred = cred, |
1da177e4 | 3158 | }; |
9bc4e3ca | 3159 | struct nfs4_renewdata *data; |
1da177e4 | 3160 | |
0851de06 AB |
3161 | if (!atomic_inc_not_zero(&clp->cl_count)) |
3162 | return -EIO; | |
9bc4e3ca CL |
3163 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
3164 | if (data == NULL) | |
3165 | return -ENOMEM; | |
3166 | data->client = clp; | |
3167 | data->timestamp = jiffies; | |
1da177e4 | 3168 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
9bc4e3ca | 3169 | &nfs4_renew_ops, data); |
1da177e4 LT |
3170 | } |
3171 | ||
adfa6f98 | 3172 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3173 | { |
3174 | struct rpc_message msg = { | |
3175 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3176 | .rpc_argp = clp, | |
b4454fe1 | 3177 | .rpc_cred = cred, |
1da177e4 LT |
3178 | }; |
3179 | unsigned long now = jiffies; | |
3180 | int status; | |
3181 | ||
3182 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3183 | if (status < 0) | |
3184 | return status; | |
452e9352 | 3185 | do_renew_lease(clp, now); |
1da177e4 LT |
3186 | return 0; |
3187 | } | |
3188 | ||
aa1870af BF |
3189 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3190 | { | |
3191 | return (server->caps & NFS_CAP_ACLS) | |
3192 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3193 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3194 | } | |
3195 | ||
3196 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3197 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3198 | * the stack. | |
3199 | */ | |
3200 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3201 | ||
3202 | static void buf_to_pages(const void *buf, size_t buflen, | |
3203 | struct page **pages, unsigned int *pgbase) | |
3204 | { | |
3205 | const void *p = buf; | |
3206 | ||
3207 | *pgbase = offset_in_page(buf); | |
3208 | p -= *pgbase; | |
3209 | while (p < buf + buflen) { | |
3210 | *(pages++) = virt_to_page(p); | |
3211 | p += PAGE_CACHE_SIZE; | |
3212 | } | |
3213 | } | |
3214 | ||
e50a1c2e BF |
3215 | struct nfs4_cached_acl { |
3216 | int cached; | |
3217 | size_t len; | |
3e9d4154 | 3218 | char data[0]; |
e50a1c2e BF |
3219 | }; |
3220 | ||
3221 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3222 | { | |
3223 | struct nfs_inode *nfsi = NFS_I(inode); | |
3224 | ||
3225 | spin_lock(&inode->i_lock); | |
3226 | kfree(nfsi->nfs4_acl); | |
3227 | nfsi->nfs4_acl = acl; | |
3228 | spin_unlock(&inode->i_lock); | |
3229 | } | |
3230 | ||
3231 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3232 | { | |
3233 | nfs4_set_cached_acl(inode, NULL); | |
3234 | } | |
3235 | ||
3236 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3237 | { | |
3238 | struct nfs_inode *nfsi = NFS_I(inode); | |
3239 | struct nfs4_cached_acl *acl; | |
3240 | int ret = -ENOENT; | |
3241 | ||
3242 | spin_lock(&inode->i_lock); | |
3243 | acl = nfsi->nfs4_acl; | |
3244 | if (acl == NULL) | |
3245 | goto out; | |
3246 | if (buf == NULL) /* user is just asking for length */ | |
3247 | goto out_len; | |
3248 | if (acl->cached == 0) | |
3249 | goto out; | |
3250 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3251 | if (acl->len > buflen) | |
3252 | goto out; | |
3253 | memcpy(buf, acl->data, acl->len); | |
3254 | out_len: | |
3255 | ret = acl->len; | |
3256 | out: | |
3257 | spin_unlock(&inode->i_lock); | |
3258 | return ret; | |
3259 | } | |
3260 | ||
3261 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3262 | { | |
3263 | struct nfs4_cached_acl *acl; | |
3264 | ||
3265 | if (buf && acl_len <= PAGE_SIZE) { | |
3266 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3267 | if (acl == NULL) | |
3268 | goto out; | |
3269 | acl->cached = 1; | |
3270 | memcpy(acl->data, buf, acl_len); | |
3271 | } else { | |
3272 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3273 | if (acl == NULL) | |
3274 | goto out; | |
3275 | acl->cached = 0; | |
3276 | } | |
3277 | acl->len = acl_len; | |
3278 | out: | |
3279 | nfs4_set_cached_acl(inode, acl); | |
3280 | } | |
3281 | ||
16b4289c | 3282 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3283 | { |
aa1870af BF |
3284 | struct page *pages[NFS4ACL_MAXPAGES]; |
3285 | struct nfs_getaclargs args = { | |
3286 | .fh = NFS_FH(inode), | |
3287 | .acl_pages = pages, | |
3288 | .acl_len = buflen, | |
3289 | }; | |
663c79b3 BH |
3290 | struct nfs_getaclres res = { |
3291 | .acl_len = buflen, | |
3292 | }; | |
e50a1c2e | 3293 | void *resp_buf; |
aa1870af BF |
3294 | struct rpc_message msg = { |
3295 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3296 | .rpc_argp = &args, | |
663c79b3 | 3297 | .rpc_resp = &res, |
aa1870af | 3298 | }; |
e50a1c2e | 3299 | struct page *localpage = NULL; |
aa1870af BF |
3300 | int ret; |
3301 | ||
e50a1c2e BF |
3302 | if (buflen < PAGE_SIZE) { |
3303 | /* As long as we're doing a round trip to the server anyway, | |
3304 | * let's be prepared for a page of acl data. */ | |
3305 | localpage = alloc_page(GFP_KERNEL); | |
3306 | resp_buf = page_address(localpage); | |
3307 | if (localpage == NULL) | |
3308 | return -ENOMEM; | |
3309 | args.acl_pages[0] = localpage; | |
3310 | args.acl_pgbase = 0; | |
663c79b3 | 3311 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3312 | } else { |
3313 | resp_buf = buf; | |
3314 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3315 | } | |
cccef3b9 | 3316 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3317 | if (ret) |
3318 | goto out_free; | |
663c79b3 BH |
3319 | if (res.acl_len > args.acl_len) |
3320 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3321 | else |
663c79b3 | 3322 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3323 | if (buf) { |
3324 | ret = -ERANGE; | |
663c79b3 | 3325 | if (res.acl_len > buflen) |
e50a1c2e BF |
3326 | goto out_free; |
3327 | if (localpage) | |
663c79b3 | 3328 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3329 | } |
663c79b3 | 3330 | ret = res.acl_len; |
e50a1c2e BF |
3331 | out_free: |
3332 | if (localpage) | |
3333 | __free_page(localpage); | |
aa1870af BF |
3334 | return ret; |
3335 | } | |
3336 | ||
16b4289c TM |
3337 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3338 | { | |
3339 | struct nfs4_exception exception = { }; | |
3340 | ssize_t ret; | |
3341 | do { | |
3342 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3343 | if (ret >= 0) | |
3344 | break; | |
3345 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3346 | } while (exception.retry); | |
3347 | return ret; | |
3348 | } | |
3349 | ||
e50a1c2e BF |
3350 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3351 | { | |
3352 | struct nfs_server *server = NFS_SERVER(inode); | |
3353 | int ret; | |
3354 | ||
3355 | if (!nfs4_server_supports_acls(server)) | |
3356 | return -EOPNOTSUPP; | |
3357 | ret = nfs_revalidate_inode(server, inode); | |
3358 | if (ret < 0) | |
3359 | return ret; | |
3360 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3361 | if (ret != -ENOENT) | |
3362 | return ret; | |
3363 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3364 | } | |
3365 | ||
16b4289c | 3366 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3367 | { |
3368 | struct nfs_server *server = NFS_SERVER(inode); | |
3369 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3370 | struct nfs_setaclargs arg = { | |
3371 | .fh = NFS_FH(inode), | |
3372 | .acl_pages = pages, | |
3373 | .acl_len = buflen, | |
3374 | }; | |
73c403a9 | 3375 | struct nfs_setaclres res; |
4b580ee3 BF |
3376 | struct rpc_message msg = { |
3377 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3378 | .rpc_argp = &arg, | |
73c403a9 | 3379 | .rpc_resp = &res, |
4b580ee3 BF |
3380 | }; |
3381 | int ret; | |
3382 | ||
3383 | if (!nfs4_server_supports_acls(server)) | |
3384 | return -EOPNOTSUPP; | |
642ac549 | 3385 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3386 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3387 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3388 | nfs_access_zap_cache(inode); |
3389 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3390 | return ret; |
3391 | } | |
3392 | ||
16b4289c TM |
3393 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3394 | { | |
3395 | struct nfs4_exception exception = { }; | |
3396 | int err; | |
3397 | do { | |
3398 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3399 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3400 | &exception); | |
3401 | } while (exception.retry); | |
3402 | return err; | |
3403 | } | |
3404 | ||
1da177e4 | 3405 | static int |
aa5190d0 | 3406 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 3407 | { |
aa5190d0 TM |
3408 | struct nfs_client *clp = server->nfs_client; |
3409 | ||
3410 | if (task->tk_status >= 0) | |
1da177e4 LT |
3411 | return 0; |
3412 | switch(task->tk_status) { | |
9e33bed5 TM |
3413 | case -NFS4ERR_ADMIN_REVOKED: |
3414 | case -NFS4ERR_BAD_STATEID: | |
3415 | case -NFS4ERR_OPENMODE: | |
3416 | if (state == NULL) | |
3417 | break; | |
3418 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 3419 | goto do_state_recovery; |
1da177e4 | 3420 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 | 3421 | case -NFS4ERR_STALE_CLIENTID: |
1da177e4 | 3422 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 3423 | goto do_state_recovery; |
4745e315 AA |
3424 | #if defined(CONFIG_NFS_V4_1) |
3425 | case -NFS4ERR_BADSESSION: | |
3426 | case -NFS4ERR_BADSLOT: | |
3427 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3428 | case -NFS4ERR_DEADSESSION: | |
3429 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3430 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3431 | case -NFS4ERR_SEQ_MISORDERED: | |
3432 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3433 | task->tk_status); | |
0b9e2d41 | 3434 | nfs4_schedule_state_recovery(clp); |
4745e315 AA |
3435 | task->tk_status = 0; |
3436 | return -EAGAIN; | |
3437 | #endif /* CONFIG_NFS_V4_1 */ | |
1da177e4 | 3438 | case -NFS4ERR_DELAY: |
aa5190d0 | 3439 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 3440 | case -NFS4ERR_GRACE: |
2c643488 | 3441 | case -EKEYEXPIRED: |
1da177e4 LT |
3442 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3443 | task->tk_status = 0; | |
3444 | return -EAGAIN; | |
3445 | case -NFS4ERR_OLD_STATEID: | |
3446 | task->tk_status = 0; | |
3447 | return -EAGAIN; | |
3448 | } | |
3449 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3450 | return 0; | |
a2c0b9e2 TM |
3451 | do_state_recovery: |
3452 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3453 | nfs4_schedule_state_recovery(clp); | |
3454 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3455 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3456 | task->tk_status = 0; | |
3457 | return -EAGAIN; | |
1da177e4 LT |
3458 | } |
3459 | ||
bb8b27e5 TM |
3460 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
3461 | unsigned short port, struct rpc_cred *cred, | |
3462 | struct nfs4_setclientid_res *res) | |
1da177e4 LT |
3463 | { |
3464 | nfs4_verifier sc_verifier; | |
3465 | struct nfs4_setclientid setclientid = { | |
3466 | .sc_verifier = &sc_verifier, | |
3467 | .sc_prog = program, | |
3468 | }; | |
3469 | struct rpc_message msg = { | |
3470 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3471 | .rpc_argp = &setclientid, | |
bb8b27e5 | 3472 | .rpc_resp = res, |
286d7d6a | 3473 | .rpc_cred = cred, |
1da177e4 | 3474 | }; |
bc4785cd | 3475 | __be32 *p; |
1da177e4 LT |
3476 | int loop = 0; |
3477 | int status; | |
3478 | ||
bc4785cd | 3479 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3480 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3481 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3482 | ||
3483 | for(;;) { | |
3484 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3485 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3486 | clp->cl_ipaddr, |
3487 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3488 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3489 | rpc_peeraddr2str(clp->cl_rpcclient, |
3490 | RPC_DISPLAY_PROTO), | |
78ea323b | 3491 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3492 | clp->cl_id_uniquifier); |
3493 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3494 | sizeof(setclientid.sc_netid), |
3495 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3496 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3497 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3498 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3499 | clp->cl_ipaddr, port >> 8, port & 255); |
3500 | ||
3501 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3502 | if (status != -NFS4ERR_CLID_INUSE) | |
3503 | break; | |
3504 | if (signalled()) | |
3505 | break; | |
3506 | if (loop++ & 1) | |
3507 | ssleep(clp->cl_lease_time + 1); | |
3508 | else | |
3509 | if (++clp->cl_id_uniquifier == 0) | |
3510 | break; | |
3511 | } | |
3512 | return status; | |
3513 | } | |
3514 | ||
bb8b27e5 TM |
3515 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3516 | struct nfs4_setclientid_res *arg, | |
3517 | struct rpc_cred *cred) | |
1da177e4 LT |
3518 | { |
3519 | struct nfs_fsinfo fsinfo; | |
3520 | struct rpc_message msg = { | |
3521 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
bb8b27e5 | 3522 | .rpc_argp = arg, |
1da177e4 | 3523 | .rpc_resp = &fsinfo, |
286d7d6a | 3524 | .rpc_cred = cred, |
1da177e4 LT |
3525 | }; |
3526 | unsigned long now; | |
3527 | int status; | |
3528 | ||
3529 | now = jiffies; | |
3530 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3531 | if (status == 0) { | |
3532 | spin_lock(&clp->cl_lock); | |
3533 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3534 | clp->cl_last_renewal = now; | |
3535 | spin_unlock(&clp->cl_lock); | |
3536 | } | |
3537 | return status; | |
3538 | } | |
3539 | ||
bb8b27e5 TM |
3540 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3541 | struct nfs4_setclientid_res *arg, | |
3542 | struct rpc_cred *cred) | |
51581f3b | 3543 | { |
77e03677 | 3544 | long timeout = 0; |
51581f3b TM |
3545 | int err; |
3546 | do { | |
bb8b27e5 | 3547 | err = _nfs4_proc_setclientid_confirm(clp, arg, cred); |
51581f3b TM |
3548 | switch (err) { |
3549 | case 0: | |
3550 | return err; | |
3551 | case -NFS4ERR_RESOURCE: | |
3552 | /* The IBM lawyers misread another document! */ | |
3553 | case -NFS4ERR_DELAY: | |
3554 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3555 | } | |
3556 | } while (err == 0); | |
3557 | return err; | |
3558 | } | |
3559 | ||
fe650407 TM |
3560 | struct nfs4_delegreturndata { |
3561 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3562 | struct nfs4_delegreturnres res; |
fe650407 TM |
3563 | struct nfs_fh fh; |
3564 | nfs4_stateid stateid; | |
26e976a8 | 3565 | unsigned long timestamp; |
fa178f29 | 3566 | struct nfs_fattr fattr; |
fe650407 TM |
3567 | int rpc_status; |
3568 | }; | |
3569 | ||
fe650407 TM |
3570 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3571 | { | |
3572 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 | 3573 | |
14516c3a TM |
3574 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3575 | return; | |
938e1010 | 3576 | |
79708861 RL |
3577 | switch (task->tk_status) { |
3578 | case -NFS4ERR_STALE_STATEID: | |
3579 | case -NFS4ERR_EXPIRED: | |
3580 | case 0: | |
fa178f29 | 3581 | renew_lease(data->res.server, data->timestamp); |
79708861 RL |
3582 | break; |
3583 | default: | |
3584 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
3585 | -EAGAIN) { | |
3586 | nfs_restart_rpc(task, data->res.server->nfs_client); | |
3587 | return; | |
3588 | } | |
3589 | } | |
3590 | data->rpc_status = task->tk_status; | |
fe650407 TM |
3591 | } |
3592 | ||
3593 | static void nfs4_delegreturn_release(void *calldata) | |
3594 | { | |
fe650407 TM |
3595 | kfree(calldata); |
3596 | } | |
3597 | ||
938e1010 AA |
3598 | #if defined(CONFIG_NFS_V4_1) |
3599 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3600 | { | |
3601 | struct nfs4_delegreturndata *d_data; | |
3602 | ||
3603 | d_data = (struct nfs4_delegreturndata *)data; | |
3604 | ||
035168ab | 3605 | if (nfs4_setup_sequence(d_data->res.server, |
938e1010 AA |
3606 | &d_data->args.seq_args, |
3607 | &d_data->res.seq_res, 1, task)) | |
3608 | return; | |
3609 | rpc_call_start(task); | |
3610 | } | |
3611 | #endif /* CONFIG_NFS_V4_1 */ | |
3612 | ||
c8d149f3 | 3613 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3614 | #if defined(CONFIG_NFS_V4_1) |
3615 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3616 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3617 | .rpc_call_done = nfs4_delegreturn_done, |
3618 | .rpc_release = nfs4_delegreturn_release, | |
3619 | }; | |
3620 | ||
e6f81075 | 3621 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3622 | { |
3623 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3624 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3625 | struct rpc_task *task; |
5138fde0 TM |
3626 | struct rpc_message msg = { |
3627 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3628 | .rpc_cred = cred, | |
3629 | }; | |
c970aa85 TM |
3630 | struct rpc_task_setup task_setup_data = { |
3631 | .rpc_client = server->client, | |
5138fde0 | 3632 | .rpc_message = &msg, |
c970aa85 TM |
3633 | .callback_ops = &nfs4_delegreturn_ops, |
3634 | .flags = RPC_TASK_ASYNC, | |
3635 | }; | |
e6f81075 | 3636 | int status = 0; |
fe650407 | 3637 | |
8535b2be | 3638 | data = kzalloc(sizeof(*data), GFP_NOFS); |
fe650407 TM |
3639 | if (data == NULL) |
3640 | return -ENOMEM; | |
3641 | data->args.fhandle = &data->fh; | |
3642 | data->args.stateid = &data->stateid; | |
fa178f29 | 3643 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3644 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3645 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3646 | data->res.fattr = &data->fattr; |
3647 | data->res.server = server; | |
5138fde0 | 3648 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3649 | data->timestamp = jiffies; |
fe650407 TM |
3650 | data->rpc_status = 0; |
3651 | ||
c970aa85 | 3652 | task_setup_data.callback_data = data; |
5138fde0 TM |
3653 | msg.rpc_argp = &data->args, |
3654 | msg.rpc_resp = &data->res, | |
c970aa85 | 3655 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3656 | if (IS_ERR(task)) |
fe650407 | 3657 | return PTR_ERR(task); |
e6f81075 TM |
3658 | if (!issync) |
3659 | goto out; | |
fe650407 | 3660 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3661 | if (status != 0) |
3662 | goto out; | |
3663 | status = data->rpc_status; | |
3664 | if (status != 0) | |
3665 | goto out; | |
3666 | nfs_refresh_inode(inode, &data->fattr); | |
3667 | out: | |
e6b3c4db | 3668 | rpc_put_task(task); |
fe650407 | 3669 | return status; |
1da177e4 LT |
3670 | } |
3671 | ||
e6f81075 | 3672 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3673 | { |
3674 | struct nfs_server *server = NFS_SERVER(inode); | |
3675 | struct nfs4_exception exception = { }; | |
3676 | int err; | |
3677 | do { | |
e6f81075 | 3678 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3679 | switch (err) { |
3680 | case -NFS4ERR_STALE_STATEID: | |
3681 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3682 | case 0: |
3683 | return 0; | |
3684 | } | |
3685 | err = nfs4_handle_exception(server, err, &exception); | |
3686 | } while (exception.retry); | |
3687 | return err; | |
3688 | } | |
3689 | ||
3690 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3691 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3692 | ||
3693 | /* | |
3694 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3695 | */ | |
3696 | static unsigned long | |
3697 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3698 | { | |
150030b7 | 3699 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3700 | timeout <<= 1; |
3701 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3702 | return NFS4_LOCK_MAXTIMEOUT; | |
3703 | return timeout; | |
3704 | } | |
3705 | ||
1da177e4 LT |
3706 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3707 | { | |
3708 | struct inode *inode = state->inode; | |
3709 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3710 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3711 | struct nfs_lockt_args arg = { |
1da177e4 | 3712 | .fh = NFS_FH(inode), |
911d1aaf | 3713 | .fl = request, |
1da177e4 | 3714 | }; |
911d1aaf TM |
3715 | struct nfs_lockt_res res = { |
3716 | .denied = request, | |
1da177e4 LT |
3717 | }; |
3718 | struct rpc_message msg = { | |
3719 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3720 | .rpc_argp = &arg, | |
3721 | .rpc_resp = &res, | |
3722 | .rpc_cred = state->owner->so_cred, | |
3723 | }; | |
1da177e4 LT |
3724 | struct nfs4_lock_state *lsp; |
3725 | int status; | |
3726 | ||
911d1aaf | 3727 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3728 | status = nfs4_set_lock_state(state, request); |
3729 | if (status != 0) | |
3730 | goto out; | |
3731 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3732 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3733 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3734 | switch (status) { |
3735 | case 0: | |
3736 | request->fl_type = F_UNLCK; | |
3737 | break; | |
3738 | case -NFS4ERR_DENIED: | |
3739 | status = 0; | |
1da177e4 | 3740 | } |
70cc6487 | 3741 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3742 | out: |
1da177e4 LT |
3743 | return status; |
3744 | } | |
3745 | ||
3746 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3747 | { | |
3748 | struct nfs4_exception exception = { }; | |
3749 | int err; | |
3750 | ||
3751 | do { | |
3752 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3753 | _nfs4_proc_getlk(state, cmd, request), | |
3754 | &exception); | |
3755 | } while (exception.retry); | |
3756 | return err; | |
3757 | } | |
3758 | ||
3759 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3760 | { | |
3761 | int res = 0; | |
3762 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3763 | case FL_POSIX: | |
3764 | res = posix_lock_file_wait(file, fl); | |
3765 | break; | |
3766 | case FL_FLOCK: | |
3767 | res = flock_lock_file_wait(file, fl); | |
3768 | break; | |
3769 | default: | |
3770 | BUG(); | |
3771 | } | |
1da177e4 LT |
3772 | return res; |
3773 | } | |
3774 | ||
faf5f49c | 3775 | struct nfs4_unlockdata { |
911d1aaf TM |
3776 | struct nfs_locku_args arg; |
3777 | struct nfs_locku_res res; | |
faf5f49c TM |
3778 | struct nfs4_lock_state *lsp; |
3779 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3780 | struct file_lock fl; |
3781 | const struct nfs_server *server; | |
26e976a8 | 3782 | unsigned long timestamp; |
faf5f49c TM |
3783 | }; |
3784 | ||
911d1aaf TM |
3785 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3786 | struct nfs_open_context *ctx, | |
3787 | struct nfs4_lock_state *lsp, | |
3788 | struct nfs_seqid *seqid) | |
3789 | { | |
3790 | struct nfs4_unlockdata *p; | |
3791 | struct inode *inode = lsp->ls_state->inode; | |
3792 | ||
8535b2be | 3793 | p = kzalloc(sizeof(*p), GFP_NOFS); |
911d1aaf TM |
3794 | if (p == NULL) |
3795 | return NULL; | |
3796 | p->arg.fh = NFS_FH(inode); | |
3797 | p->arg.fl = &p->fl; | |
3798 | p->arg.seqid = seqid; | |
c1d51931 | 3799 | p->res.seqid = seqid; |
911d1aaf TM |
3800 | p->arg.stateid = &lsp->ls_stateid; |
3801 | p->lsp = lsp; | |
3802 | atomic_inc(&lsp->ls_count); | |
3803 | /* Ensure we don't close file until we're done freeing locks! */ | |
3804 | p->ctx = get_nfs_open_context(ctx); | |
3805 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3806 | p->server = NFS_SERVER(inode); | |
3807 | return p; | |
3808 | } | |
3809 | ||
06f814a3 | 3810 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3811 | { |
963d8fe5 | 3812 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3813 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3814 | nfs4_put_lock_state(calldata->lsp); |
3815 | put_nfs_open_context(calldata->ctx); | |
3816 | kfree(calldata); | |
faf5f49c TM |
3817 | } |
3818 | ||
963d8fe5 | 3819 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3820 | { |
963d8fe5 | 3821 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3822 | |
14516c3a TM |
3823 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
3824 | return; | |
faf5f49c TM |
3825 | switch (task->tk_status) { |
3826 | case 0: | |
3827 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3828 | calldata->res.stateid.data, |
faf5f49c | 3829 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3830 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3831 | break; |
9e33bed5 TM |
3832 | case -NFS4ERR_BAD_STATEID: |
3833 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3834 | case -NFS4ERR_STALE_STATEID: |
3835 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3836 | break; |
3837 | default: | |
9e33bed5 | 3838 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
0110ee15 | 3839 | nfs_restart_rpc(task, |
d61e612a | 3840 | calldata->server->nfs_client); |
faf5f49c | 3841 | } |
faf5f49c TM |
3842 | } |
3843 | ||
4ce70ada | 3844 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3845 | { |
4ce70ada | 3846 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3847 | |
911d1aaf | 3848 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3849 | return; |
3850 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3851 | /* Note: exit _without_ running nfs4_locku_done */ |
3852 | task->tk_action = NULL; | |
faf5f49c TM |
3853 | return; |
3854 | } | |
26e976a8 | 3855 | calldata->timestamp = jiffies; |
035168ab | 3856 | if (nfs4_setup_sequence(calldata->server, |
a893693c AA |
3857 | &calldata->arg.seq_args, |
3858 | &calldata->res.seq_res, 1, task)) | |
3859 | return; | |
5138fde0 | 3860 | rpc_call_start(task); |
faf5f49c TM |
3861 | } |
3862 | ||
963d8fe5 | 3863 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3864 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3865 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3866 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3867 | }; |
3868 | ||
a5d16a4d TM |
3869 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3870 | struct nfs_open_context *ctx, | |
3871 | struct nfs4_lock_state *lsp, | |
3872 | struct nfs_seqid *seqid) | |
3873 | { | |
3874 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3875 | struct rpc_message msg = { |
3876 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3877 | .rpc_cred = ctx->cred, | |
3878 | }; | |
c970aa85 TM |
3879 | struct rpc_task_setup task_setup_data = { |
3880 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3881 | .rpc_message = &msg, |
c970aa85 | 3882 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3883 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3884 | .flags = RPC_TASK_ASYNC, |
3885 | }; | |
a5d16a4d | 3886 | |
137d6aca FF |
3887 | /* Ensure this is an unlock - when canceling a lock, the |
3888 | * canceled lock is passed in, and it won't be an unlock. | |
3889 | */ | |
3890 | fl->fl_type = F_UNLCK; | |
3891 | ||
a5d16a4d TM |
3892 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3893 | if (data == NULL) { | |
3894 | nfs_free_seqid(seqid); | |
3895 | return ERR_PTR(-ENOMEM); | |
3896 | } | |
3897 | ||
5138fde0 TM |
3898 | msg.rpc_argp = &data->arg, |
3899 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3900 | task_setup_data.callback_data = data; |
3901 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3902 | } |
3903 | ||
faf5f49c TM |
3904 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3905 | { | |
19e03c57 | 3906 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3907 | struct nfs_seqid *seqid; |
1da177e4 | 3908 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3909 | struct rpc_task *task; |
3910 | int status = 0; | |
536ff0f8 | 3911 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3912 | |
8d0a8a9d | 3913 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3914 | /* Unlock _before_ we do the RPC call */ |
3915 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3916 | down_read(&nfsi->rwsem); |
3917 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3918 | up_read(&nfsi->rwsem); | |
9b073574 | 3919 | goto out; |
19e03c57 TM |
3920 | } |
3921 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3922 | if (status != 0) |
9b073574 TM |
3923 | goto out; |
3924 | /* Is this a delegated lock? */ | |
3925 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3926 | goto out; | |
8d0a8a9d | 3927 | lsp = request->fl_u.nfs4_fl.owner; |
8535b2be | 3928 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
9b073574 | 3929 | status = -ENOMEM; |
911d1aaf | 3930 | if (seqid == NULL) |
9b073574 | 3931 | goto out; |
cd3758e3 | 3932 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3933 | status = PTR_ERR(task); |
3934 | if (IS_ERR(task)) | |
9b073574 | 3935 | goto out; |
a5d16a4d | 3936 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3937 | rpc_put_task(task); |
9b073574 | 3938 | out: |
536ff0f8 | 3939 | request->fl_flags = fl_flags; |
1da177e4 LT |
3940 | return status; |
3941 | } | |
3942 | ||
a5d16a4d TM |
3943 | struct nfs4_lockdata { |
3944 | struct nfs_lock_args arg; | |
3945 | struct nfs_lock_res res; | |
3946 | struct nfs4_lock_state *lsp; | |
3947 | struct nfs_open_context *ctx; | |
3948 | struct file_lock fl; | |
26e976a8 | 3949 | unsigned long timestamp; |
a5d16a4d TM |
3950 | int rpc_status; |
3951 | int cancelled; | |
66179efe | 3952 | struct nfs_server *server; |
a5d16a4d TM |
3953 | }; |
3954 | ||
3955 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
8535b2be TM |
3956 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
3957 | gfp_t gfp_mask) | |
1da177e4 | 3958 | { |
a5d16a4d TM |
3959 | struct nfs4_lockdata *p; |
3960 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3961 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d | 3962 | |
8535b2be | 3963 | p = kzalloc(sizeof(*p), gfp_mask); |
a5d16a4d TM |
3964 | if (p == NULL) |
3965 | return NULL; | |
3966 | ||
3967 | p->arg.fh = NFS_FH(inode); | |
3968 | p->arg.fl = &p->fl; | |
8535b2be | 3969 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
2f74c0a0 TM |
3970 | if (p->arg.open_seqid == NULL) |
3971 | goto out_free; | |
8535b2be | 3972 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
a5d16a4d | 3973 | if (p->arg.lock_seqid == NULL) |
2f74c0a0 | 3974 | goto out_free_seqid; |
a5d16a4d | 3975 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3976 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3977 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3978 | p->res.lock_seqid = p->arg.lock_seqid; |
a5d16a4d | 3979 | p->lsp = lsp; |
66179efe | 3980 | p->server = server; |
a5d16a4d TM |
3981 | atomic_inc(&lsp->ls_count); |
3982 | p->ctx = get_nfs_open_context(ctx); | |
3983 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3984 | return p; | |
2f74c0a0 TM |
3985 | out_free_seqid: |
3986 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3987 | out_free: |
3988 | kfree(p); | |
3989 | return NULL; | |
3990 | } | |
3991 | ||
3992 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3993 | { | |
3994 | struct nfs4_lockdata *data = calldata; | |
3995 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3996 | |
3110ff80 | 3997 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3998 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3999 | return; | |
a5d16a4d TM |
4000 | /* Do we need to do an open_to_lock_owner? */ |
4001 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
4002 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
4003 | return; | |
a5d16a4d TM |
4004 | data->arg.open_stateid = &state->stateid; |
4005 | data->arg.new_lock_owner = 1; | |
c1d51931 | 4006 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
4007 | } else |
4008 | data->arg.new_lock_owner = 0; | |
26e976a8 | 4009 | data->timestamp = jiffies; |
035168ab TM |
4010 | if (nfs4_setup_sequence(data->server, |
4011 | &data->arg.seq_args, | |
66179efe AA |
4012 | &data->res.seq_res, 1, task)) |
4013 | return; | |
5138fde0 | 4014 | rpc_call_start(task); |
3110ff80 | 4015 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
4016 | } |
4017 | ||
b257957e AB |
4018 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
4019 | { | |
4020 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
4021 | nfs4_lock_prepare(task, calldata); | |
4022 | } | |
4023 | ||
a5d16a4d TM |
4024 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
4025 | { | |
4026 | struct nfs4_lockdata *data = calldata; | |
4027 | ||
3110ff80 | 4028 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 4029 | |
14516c3a TM |
4030 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
4031 | return; | |
66179efe | 4032 | |
a5d16a4d | 4033 | data->rpc_status = task->tk_status; |
a5d16a4d | 4034 | if (data->arg.new_lock_owner != 0) { |
a5d16a4d TM |
4035 | if (data->rpc_status == 0) |
4036 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4037 | else | |
4038 | goto out; | |
4039 | } | |
4040 | if (data->rpc_status == 0) { | |
4041 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
4042 | sizeof(data->lsp->ls_stateid.data)); | |
4043 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 4044 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 4045 | } |
a5d16a4d | 4046 | out: |
3110ff80 | 4047 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
4048 | } |
4049 | ||
4050 | static void nfs4_lock_release(void *calldata) | |
4051 | { | |
4052 | struct nfs4_lockdata *data = calldata; | |
4053 | ||
3110ff80 | 4054 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 4055 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
4056 | if (data->cancelled != 0) { |
4057 | struct rpc_task *task; | |
4058 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4059 | data->arg.lock_seqid); | |
4060 | if (!IS_ERR(task)) | |
e6b3c4db | 4061 | rpc_put_task(task); |
3110ff80 | 4062 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
4063 | } else |
4064 | nfs_free_seqid(data->arg.lock_seqid); | |
4065 | nfs4_put_lock_state(data->lsp); | |
4066 | put_nfs_open_context(data->ctx); | |
4067 | kfree(data); | |
3110ff80 | 4068 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
4069 | } |
4070 | ||
4071 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4072 | .rpc_call_prepare = nfs4_lock_prepare, | |
4073 | .rpc_call_done = nfs4_lock_done, | |
4074 | .rpc_release = nfs4_lock_release, | |
4075 | }; | |
4076 | ||
b257957e AB |
4077 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
4078 | .rpc_call_prepare = nfs4_recover_lock_prepare, | |
4079 | .rpc_call_done = nfs4_lock_done, | |
4080 | .rpc_release = nfs4_lock_release, | |
4081 | }; | |
4082 | ||
2bee72a6 TM |
4083 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
4084 | { | |
4085 | struct nfs_client *clp = server->nfs_client; | |
4086 | struct nfs4_state *state = lsp->ls_state; | |
4087 | ||
4088 | switch (error) { | |
4089 | case -NFS4ERR_ADMIN_REVOKED: | |
4090 | case -NFS4ERR_BAD_STATEID: | |
4091 | case -NFS4ERR_EXPIRED: | |
4092 | if (new_lock_owner != 0 || | |
4093 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4094 | nfs4_state_mark_reclaim_nograce(clp, state); | |
4095 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
a2c0b9e2 TM |
4096 | break; |
4097 | case -NFS4ERR_STALE_STATEID: | |
4098 | if (new_lock_owner != 0 || | |
4099 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4100 | nfs4_state_mark_reclaim_reboot(clp, state); | |
4101 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
2bee72a6 TM |
4102 | }; |
4103 | } | |
4104 | ||
afe6c27c | 4105 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
a5d16a4d TM |
4106 | { |
4107 | struct nfs4_lockdata *data; | |
4108 | struct rpc_task *task; | |
5138fde0 TM |
4109 | struct rpc_message msg = { |
4110 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4111 | .rpc_cred = state->owner->so_cred, | |
4112 | }; | |
c970aa85 TM |
4113 | struct rpc_task_setup task_setup_data = { |
4114 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 4115 | .rpc_message = &msg, |
c970aa85 | 4116 | .callback_ops = &nfs4_lock_ops, |
101070ca | 4117 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
4118 | .flags = RPC_TASK_ASYNC, |
4119 | }; | |
a5d16a4d TM |
4120 | int ret; |
4121 | ||
3110ff80 | 4122 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 4123 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
8535b2be TM |
4124 | fl->fl_u.nfs4_fl.owner, |
4125 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); | |
a5d16a4d TM |
4126 | if (data == NULL) |
4127 | return -ENOMEM; | |
4128 | if (IS_SETLKW(cmd)) | |
4129 | data->arg.block = 1; | |
b257957e AB |
4130 | if (recovery_type > NFS_LOCK_NEW) { |
4131 | if (recovery_type == NFS_LOCK_RECLAIM) | |
afe6c27c | 4132 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
b257957e AB |
4133 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
4134 | } | |
5138fde0 TM |
4135 | msg.rpc_argp = &data->arg, |
4136 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
4137 | task_setup_data.callback_data = data; |
4138 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 4139 | if (IS_ERR(task)) |
a5d16a4d | 4140 | return PTR_ERR(task); |
a5d16a4d TM |
4141 | ret = nfs4_wait_for_completion_rpc_task(task); |
4142 | if (ret == 0) { | |
4143 | ret = data->rpc_status; | |
2bee72a6 TM |
4144 | if (ret) |
4145 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4146 | data->arg.new_lock_owner, ret); | |
a5d16a4d TM |
4147 | } else |
4148 | data->cancelled = 1; | |
e6b3c4db | 4149 | rpc_put_task(task); |
3110ff80 | 4150 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 4151 | return ret; |
1da177e4 LT |
4152 | } |
4153 | ||
4154 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4155 | { | |
202b50dc TM |
4156 | struct nfs_server *server = NFS_SERVER(state->inode); |
4157 | struct nfs4_exception exception = { }; | |
4158 | int err; | |
4159 | ||
4160 | do { | |
42a2d13e TM |
4161 | /* Cache the lock if possible... */ |
4162 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4163 | return 0; | |
afe6c27c | 4164 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
168667c4 | 4165 | if (err != -NFS4ERR_DELAY) |
202b50dc TM |
4166 | break; |
4167 | nfs4_handle_exception(server, err, &exception); | |
4168 | } while (exception.retry); | |
4169 | return err; | |
1da177e4 LT |
4170 | } |
4171 | ||
4172 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4173 | { | |
202b50dc TM |
4174 | struct nfs_server *server = NFS_SERVER(state->inode); |
4175 | struct nfs4_exception exception = { }; | |
4176 | int err; | |
4177 | ||
6bfc93ef TM |
4178 | err = nfs4_set_lock_state(state, request); |
4179 | if (err != 0) | |
4180 | return err; | |
202b50dc | 4181 | do { |
42a2d13e TM |
4182 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
4183 | return 0; | |
afe6c27c | 4184 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
a9ed2e25 TM |
4185 | switch (err) { |
4186 | default: | |
4187 | goto out; | |
4188 | case -NFS4ERR_GRACE: | |
4189 | case -NFS4ERR_DELAY: | |
4190 | nfs4_handle_exception(server, err, &exception); | |
4191 | err = 0; | |
4192 | } | |
202b50dc | 4193 | } while (exception.retry); |
a9ed2e25 | 4194 | out: |
202b50dc | 4195 | return err; |
1da177e4 LT |
4196 | } |
4197 | ||
4198 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4199 | { | |
19e03c57 | 4200 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 4201 | unsigned char fl_flags = request->fl_flags; |
8e469ebd | 4202 | int status = -ENOLCK; |
1da177e4 | 4203 | |
8e469ebd TM |
4204 | if ((fl_flags & FL_POSIX) && |
4205 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4206 | goto out; | |
6bfc93ef | 4207 | /* Is this a delegated open? */ |
6bfc93ef TM |
4208 | status = nfs4_set_lock_state(state, request); |
4209 | if (status != 0) | |
4210 | goto out; | |
01c3b861 TM |
4211 | request->fl_flags |= FL_ACCESS; |
4212 | status = do_vfs_lock(request->fl_file, request); | |
4213 | if (status < 0) | |
4214 | goto out; | |
19e03c57 | 4215 | down_read(&nfsi->rwsem); |
01c3b861 | 4216 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 4217 | /* Yes: cache locks! */ |
01c3b861 | 4218 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
4219 | request->fl_flags = fl_flags & ~FL_SLEEP; |
4220 | status = do_vfs_lock(request->fl_file, request); | |
4221 | goto out_unlock; | |
01c3b861 | 4222 | } |
afe6c27c | 4223 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
6bfc93ef | 4224 | if (status != 0) |
01c3b861 | 4225 | goto out_unlock; |
6bfc93ef | 4226 | /* Note: we always want to sleep here! */ |
01c3b861 | 4227 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 4228 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 4229 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 4230 | out_unlock: |
19e03c57 | 4231 | up_read(&nfsi->rwsem); |
01c3b861 TM |
4232 | out: |
4233 | request->fl_flags = fl_flags; | |
1da177e4 LT |
4234 | return status; |
4235 | } | |
4236 | ||
4237 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4238 | { | |
4239 | struct nfs4_exception exception = { }; | |
4240 | int err; | |
4241 | ||
4242 | do { | |
965b5d67 TM |
4243 | err = _nfs4_proc_setlk(state, cmd, request); |
4244 | if (err == -NFS4ERR_DENIED) | |
4245 | err = -EAGAIN; | |
1da177e4 | 4246 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
965b5d67 | 4247 | err, &exception); |
1da177e4 LT |
4248 | } while (exception.retry); |
4249 | return err; | |
4250 | } | |
4251 | ||
4252 | static int | |
4253 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4254 | { | |
4255 | struct nfs_open_context *ctx; | |
4256 | struct nfs4_state *state; | |
4257 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4258 | int status; | |
4259 | ||
4260 | /* verify open state */ | |
cd3758e3 | 4261 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4262 | state = ctx->state; |
4263 | ||
4264 | if (request->fl_start < 0 || request->fl_end < 0) | |
4265 | return -EINVAL; | |
4266 | ||
d953126a TM |
4267 | if (IS_GETLK(cmd)) { |
4268 | if (state != NULL) | |
4269 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4270 | return 0; | |
4271 | } | |
1da177e4 LT |
4272 | |
4273 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4274 | return -EINVAL; | |
4275 | ||
d953126a TM |
4276 | if (request->fl_type == F_UNLCK) { |
4277 | if (state != NULL) | |
4278 | return nfs4_proc_unlck(state, cmd, request); | |
4279 | return 0; | |
4280 | } | |
1da177e4 | 4281 | |
d953126a TM |
4282 | if (state == NULL) |
4283 | return -ENOLCK; | |
1da177e4 LT |
4284 | do { |
4285 | status = nfs4_proc_setlk(state, cmd, request); | |
4286 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4287 | break; | |
4288 | timeout = nfs4_set_lock_task_retry(timeout); | |
4289 | status = -ERESTARTSYS; | |
4290 | if (signalled()) | |
4291 | break; | |
4292 | } while(status < 0); | |
1da177e4 LT |
4293 | return status; |
4294 | } | |
4295 | ||
888e694c TM |
4296 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4297 | { | |
4298 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4299 | struct nfs4_exception exception = { }; | |
4300 | int err; | |
4301 | ||
4302 | err = nfs4_set_lock_state(state, fl); | |
4303 | if (err != 0) | |
4304 | goto out; | |
4305 | do { | |
afe6c27c | 4306 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
d5122201 TM |
4307 | switch (err) { |
4308 | default: | |
4309 | printk(KERN_ERR "%s: unhandled error %d.\n", | |
4310 | __func__, err); | |
4311 | case 0: | |
965b5d67 | 4312 | case -ESTALE: |
d5122201 TM |
4313 | goto out; |
4314 | case -NFS4ERR_EXPIRED: | |
4315 | case -NFS4ERR_STALE_CLIENTID: | |
965b5d67 | 4316 | case -NFS4ERR_STALE_STATEID: |
74e7bb73 RL |
4317 | case -NFS4ERR_BADSESSION: |
4318 | case -NFS4ERR_BADSLOT: | |
4319 | case -NFS4ERR_BAD_HIGH_SLOT: | |
4320 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
4321 | case -NFS4ERR_DEADSESSION: | |
d5122201 TM |
4322 | nfs4_schedule_state_recovery(server->nfs_client); |
4323 | goto out; | |
965b5d67 TM |
4324 | case -ERESTARTSYS: |
4325 | /* | |
4326 | * The show must go on: exit, but mark the | |
4327 | * stateid as needing recovery. | |
4328 | */ | |
4329 | case -NFS4ERR_ADMIN_REVOKED: | |
4330 | case -NFS4ERR_BAD_STATEID: | |
4331 | case -NFS4ERR_OPENMODE: | |
4332 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
4333 | err = 0; | |
4334 | goto out; | |
168667c4 TM |
4335 | case -EKEYEXPIRED: |
4336 | /* | |
4337 | * User RPCSEC_GSS context has expired. | |
4338 | * We cannot recover this stateid now, so | |
4339 | * skip it and allow recovery thread to | |
4340 | * proceed. | |
4341 | */ | |
4342 | err = 0; | |
4343 | goto out; | |
965b5d67 TM |
4344 | case -ENOMEM: |
4345 | case -NFS4ERR_DENIED: | |
4346 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
4347 | err = 0; | |
4348 | goto out; | |
d5122201 TM |
4349 | case -NFS4ERR_DELAY: |
4350 | break; | |
4351 | } | |
888e694c TM |
4352 | err = nfs4_handle_exception(server, err, &exception); |
4353 | } while (exception.retry); | |
4354 | out: | |
4355 | return err; | |
4356 | } | |
6b3b5496 | 4357 | |
d3c7b7cc TM |
4358 | static void nfs4_release_lockowner_release(void *calldata) |
4359 | { | |
4360 | kfree(calldata); | |
4361 | } | |
4362 | ||
4363 | const struct rpc_call_ops nfs4_release_lockowner_ops = { | |
4364 | .rpc_release = nfs4_release_lockowner_release, | |
4365 | }; | |
4366 | ||
4367 | void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) | |
4368 | { | |
4369 | struct nfs_server *server = lsp->ls_state->owner->so_server; | |
4370 | struct nfs_release_lockowner_args *args; | |
4371 | struct rpc_message msg = { | |
4372 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], | |
4373 | }; | |
4374 | ||
4375 | if (server->nfs_client->cl_mvops->minor_version != 0) | |
4376 | return; | |
4377 | args = kmalloc(sizeof(*args), GFP_NOFS); | |
4378 | if (!args) | |
4379 | return; | |
4380 | args->lock_owner.clientid = server->nfs_client->cl_clientid; | |
4381 | args->lock_owner.id = lsp->ls_id.id; | |
4382 | msg.rpc_argp = args; | |
4383 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); | |
4384 | } | |
4385 | ||
aa1870af BF |
4386 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4387 | ||
6b3b5496 BF |
4388 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4389 | size_t buflen, int flags) | |
4390 | { | |
4b580ee3 BF |
4391 | struct inode *inode = dentry->d_inode; |
4392 | ||
4393 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4394 | return -EOPNOTSUPP; | |
4395 | ||
4b580ee3 | 4396 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4397 | } |
4398 | ||
4399 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4400 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4401 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4402 | * attributes in kernel-managed attribute namespaces. */ | |
4403 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4404 | size_t buflen) | |
4405 | { | |
aa1870af BF |
4406 | struct inode *inode = dentry->d_inode; |
4407 | ||
4408 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4409 | return -EOPNOTSUPP; | |
4410 | ||
4411 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4412 | } |
4413 | ||
4414 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4415 | { | |
aa1870af | 4416 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4417 | |
096455a2 BF |
4418 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4419 | return 0; | |
6b3b5496 BF |
4420 | if (buf && buflen < len) |
4421 | return -ERANGE; | |
4422 | if (buf) | |
aa1870af BF |
4423 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4424 | return len; | |
6b3b5496 BF |
4425 | } |
4426 | ||
69aaaae1 TM |
4427 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4428 | { | |
4429 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4430 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4431 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4432 | return; | |
4433 | ||
4434 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4435 | NFS_ATTR_FATTR_NLINK; | |
4436 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4437 | fattr->nlink = 2; | |
4438 | } | |
4439 | ||
56659e99 | 4440 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4441 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4442 | { |
4443 | struct nfs_server *server = NFS_SERVER(dir); | |
4444 | u32 bitmask[2] = { | |
361e624f MN |
4445 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4446 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4447 | }; |
4448 | struct nfs4_fs_locations_arg args = { | |
4449 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4450 | .name = name, |
683b57b4 TM |
4451 | .page = page, |
4452 | .bitmask = bitmask, | |
4453 | }; | |
22958463 BH |
4454 | struct nfs4_fs_locations_res res = { |
4455 | .fs_locations = fs_locations, | |
4456 | }; | |
683b57b4 TM |
4457 | struct rpc_message msg = { |
4458 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4459 | .rpc_argp = &args, | |
22958463 | 4460 | .rpc_resp = &res, |
683b57b4 TM |
4461 | }; |
4462 | int status; | |
4463 | ||
3110ff80 | 4464 | dprintk("%s: start\n", __func__); |
c228fd3a | 4465 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4466 | fs_locations->server = server; |
830b8e33 | 4467 | fs_locations->nlocations = 0; |
cccef3b9 | 4468 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4469 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4470 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4471 | return status; |
4472 | } | |
4473 | ||
557134a3 | 4474 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4475 | /* |
4476 | * nfs4_proc_exchange_id() | |
4477 | * | |
4478 | * Since the clientid has expired, all compounds using sessions | |
4479 | * associated with the stale clientid will be returning | |
4480 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4481 | * be in some phase of session reset. | |
4482 | */ | |
4d643d1d | 4483 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
99fe60d0 BH |
4484 | { |
4485 | nfs4_verifier verifier; | |
4486 | struct nfs41_exchange_id_args args = { | |
4487 | .client = clp, | |
4488 | .flags = clp->cl_exchange_flags, | |
4489 | }; | |
4490 | struct nfs41_exchange_id_res res = { | |
4491 | .client = clp, | |
4492 | }; | |
4493 | int status; | |
4494 | struct rpc_message msg = { | |
4495 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4496 | .rpc_argp = &args, | |
4497 | .rpc_resp = &res, | |
4498 | .rpc_cred = cred, | |
4499 | }; | |
4500 | __be32 *p; | |
4501 | ||
4502 | dprintk("--> %s\n", __func__); | |
4503 | BUG_ON(clp == NULL); | |
a7b72103 | 4504 | |
7b183d0d AB |
4505 | /* Remove server-only flags */ |
4506 | args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; | |
4507 | ||
99fe60d0 BH |
4508 | p = (u32 *)verifier.data; |
4509 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4510 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4511 | args.verifier = &verifier; | |
4512 | ||
4513 | while (1) { | |
4514 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4515 | "%s/%s %u", | |
4516 | clp->cl_ipaddr, | |
4517 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4518 | RPC_DISPLAY_ADDR), | |
4519 | clp->cl_id_uniquifier); | |
4520 | ||
4521 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4522 | ||
180b62a3 | 4523 | if (status != -NFS4ERR_CLID_INUSE) |
99fe60d0 BH |
4524 | break; |
4525 | ||
4526 | if (signalled()) | |
4527 | break; | |
4528 | ||
4529 | if (++clp->cl_id_uniquifier == 0) | |
4530 | break; | |
4531 | } | |
4532 | ||
4533 | dprintk("<-- %s status= %d\n", __func__, status); | |
4534 | return status; | |
4535 | } | |
4536 | ||
2050f0cc AA |
4537 | struct nfs4_get_lease_time_data { |
4538 | struct nfs4_get_lease_time_args *args; | |
4539 | struct nfs4_get_lease_time_res *res; | |
4540 | struct nfs_client *clp; | |
4541 | }; | |
4542 | ||
4543 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4544 | void *calldata) | |
4545 | { | |
4546 | int ret; | |
4547 | struct nfs4_get_lease_time_data *data = | |
4548 | (struct nfs4_get_lease_time_data *)calldata; | |
4549 | ||
4550 | dprintk("--> %s\n", __func__); | |
689cf5c1 | 4551 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
2050f0cc AA |
4552 | /* just setup sequence, do not trigger session recovery |
4553 | since we're invoked within one */ | |
4554 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
689cf5c1 AB |
4555 | &data->args->la_seq_args, |
4556 | &data->res->lr_seq_res, 0, task); | |
2050f0cc AA |
4557 | |
4558 | BUG_ON(ret == -EAGAIN); | |
4559 | rpc_call_start(task); | |
4560 | dprintk("<-- %s\n", __func__); | |
4561 | } | |
4562 | ||
4563 | /* | |
4564 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4565 | * from sequence operation or clientid errors. | |
4566 | */ | |
4567 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4568 | { | |
4569 | struct nfs4_get_lease_time_data *data = | |
4570 | (struct nfs4_get_lease_time_data *)calldata; | |
4571 | ||
4572 | dprintk("--> %s\n", __func__); | |
14516c3a TM |
4573 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
4574 | return; | |
2050f0cc AA |
4575 | switch (task->tk_status) { |
4576 | case -NFS4ERR_DELAY: | |
4577 | case -NFS4ERR_GRACE: | |
4578 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
4579 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4580 | task->tk_status = 0; | |
0110ee15 | 4581 | nfs_restart_rpc(task, data->clp); |
2050f0cc AA |
4582 | return; |
4583 | } | |
2050f0cc AA |
4584 | dprintk("<-- %s\n", __func__); |
4585 | } | |
4586 | ||
4587 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4588 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4589 | .rpc_call_done = nfs4_get_lease_time_done, | |
4590 | }; | |
4591 | ||
4592 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4593 | { | |
4594 | struct rpc_task *task; | |
4595 | struct nfs4_get_lease_time_args args; | |
4596 | struct nfs4_get_lease_time_res res = { | |
4597 | .lr_fsinfo = fsinfo, | |
4598 | }; | |
4599 | struct nfs4_get_lease_time_data data = { | |
4600 | .args = &args, | |
4601 | .res = &res, | |
4602 | .clp = clp, | |
4603 | }; | |
4604 | struct rpc_message msg = { | |
4605 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4606 | .rpc_argp = &args, | |
4607 | .rpc_resp = &res, | |
4608 | }; | |
4609 | struct rpc_task_setup task_setup = { | |
4610 | .rpc_client = clp->cl_rpcclient, | |
4611 | .rpc_message = &msg, | |
4612 | .callback_ops = &nfs4_get_lease_time_ops, | |
4613 | .callback_data = &data | |
4614 | }; | |
4615 | int status; | |
4616 | ||
2050f0cc AA |
4617 | dprintk("--> %s\n", __func__); |
4618 | task = rpc_run_task(&task_setup); | |
4619 | ||
4620 | if (IS_ERR(task)) | |
4621 | status = PTR_ERR(task); | |
4622 | else { | |
4623 | status = task->tk_status; | |
4624 | rpc_put_task(task); | |
4625 | } | |
4626 | dprintk("<-- %s return %d\n", __func__, status); | |
4627 | ||
4628 | return status; | |
4629 | } | |
4630 | ||
b73dafa7 RL |
4631 | /* |
4632 | * Reset a slot table | |
4633 | */ | |
104aeba4 AA |
4634 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
4635 | int ivalue) | |
ac72b7b3 | 4636 | { |
104aeba4 | 4637 | struct nfs4_slot *new = NULL; |
b73dafa7 | 4638 | int i; |
ac72b7b3 AA |
4639 | int ret = 0; |
4640 | ||
104aeba4 AA |
4641 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
4642 | max_reqs, tbl->max_slots); | |
ac72b7b3 | 4643 | |
104aeba4 AA |
4644 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
4645 | if (max_reqs != tbl->max_slots) { | |
4646 | ret = -ENOMEM; | |
4647 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), | |
8535b2be | 4648 | GFP_NOFS); |
104aeba4 AA |
4649 | if (!new) |
4650 | goto out; | |
4651 | ret = 0; | |
4652 | kfree(tbl->slots); | |
ac72b7b3 AA |
4653 | } |
4654 | spin_lock(&tbl->slot_tbl_lock); | |
104aeba4 AA |
4655 | if (new) { |
4656 | tbl->slots = new; | |
4657 | tbl->max_slots = max_reqs; | |
4658 | } | |
4659 | for (i = 0; i < tbl->max_slots; ++i) | |
b73dafa7 | 4660 | tbl->slots[i].seq_nr = ivalue; |
ac72b7b3 AA |
4661 | spin_unlock(&tbl->slot_tbl_lock); |
4662 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4663 | tbl, tbl->slots, tbl->max_slots); | |
4664 | out: | |
4665 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4666 | return ret; | |
4667 | } | |
4668 | ||
b73dafa7 RL |
4669 | /* |
4670 | * Reset the forechannel and backchannel slot tables | |
4671 | */ | |
4672 | static int nfs4_reset_slot_tables(struct nfs4_session *session) | |
4673 | { | |
4674 | int status; | |
4675 | ||
4676 | status = nfs4_reset_slot_table(&session->fc_slot_table, | |
104aeba4 | 4677 | session->fc_attrs.max_reqs, 1); |
f8625a6a RL |
4678 | if (status) |
4679 | return status; | |
4680 | ||
4681 | status = nfs4_reset_slot_table(&session->bc_slot_table, | |
104aeba4 | 4682 | session->bc_attrs.max_reqs, 0); |
b73dafa7 RL |
4683 | return status; |
4684 | } | |
4685 | ||
f8625a6a RL |
4686 | /* Destroy the slot table */ |
4687 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) | |
4688 | { | |
4689 | if (session->fc_slot_table.slots != NULL) { | |
4690 | kfree(session->fc_slot_table.slots); | |
4691 | session->fc_slot_table.slots = NULL; | |
4692 | } | |
4693 | if (session->bc_slot_table.slots != NULL) { | |
4694 | kfree(session->bc_slot_table.slots); | |
4695 | session->bc_slot_table.slots = NULL; | |
4696 | } | |
4697 | return; | |
4698 | } | |
4699 | ||
fc931582 AA |
4700 | /* |
4701 | * Initialize slot table | |
4702 | */ | |
050047ce RL |
4703 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
4704 | int max_slots, int ivalue) | |
fc931582 | 4705 | { |
fc931582 AA |
4706 | struct nfs4_slot *slot; |
4707 | int ret = -ENOMEM; | |
4708 | ||
4709 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4710 | ||
050047ce | 4711 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
fc931582 | 4712 | |
8535b2be | 4713 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); |
fc931582 AA |
4714 | if (!slot) |
4715 | goto out; | |
fc931582 AA |
4716 | ret = 0; |
4717 | ||
4718 | spin_lock(&tbl->slot_tbl_lock); | |
fc931582 AA |
4719 | tbl->max_slots = max_slots; |
4720 | tbl->slots = slot; | |
4721 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4722 | spin_unlock(&tbl->slot_tbl_lock); | |
4723 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4724 | tbl, tbl->slots, tbl->max_slots); | |
4725 | out: | |
4726 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4727 | return ret; | |
fc931582 AA |
4728 | } |
4729 | ||
050047ce RL |
4730 | /* |
4731 | * Initialize the forechannel and backchannel tables | |
4732 | */ | |
4733 | static int nfs4_init_slot_tables(struct nfs4_session *session) | |
4734 | { | |
f26468fb TM |
4735 | struct nfs4_slot_table *tbl; |
4736 | int status = 0; | |
050047ce | 4737 | |
f26468fb TM |
4738 | tbl = &session->fc_slot_table; |
4739 | if (tbl->slots == NULL) { | |
4740 | status = nfs4_init_slot_table(tbl, | |
4741 | session->fc_attrs.max_reqs, 1); | |
4742 | if (status) | |
4743 | return status; | |
4744 | } | |
050047ce | 4745 | |
f26468fb TM |
4746 | tbl = &session->bc_slot_table; |
4747 | if (tbl->slots == NULL) { | |
4748 | status = nfs4_init_slot_table(tbl, | |
4749 | session->bc_attrs.max_reqs, 0); | |
4750 | if (status) | |
4751 | nfs4_destroy_slot_tables(session); | |
4752 | } | |
f8625a6a RL |
4753 | |
4754 | return status; | |
557134a3 AA |
4755 | } |
4756 | ||
4757 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4758 | { | |
4759 | struct nfs4_session *session; | |
4760 | struct nfs4_slot_table *tbl; | |
4761 | ||
8535b2be | 4762 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
557134a3 AA |
4763 | if (!session) |
4764 | return NULL; | |
76db6d95 | 4765 | |
ea028ac9 | 4766 | init_completion(&session->complete); |
76db6d95 | 4767 | |
557134a3 | 4768 | tbl = &session->fc_slot_table; |
9dfdf404 | 4769 | tbl->highest_used_slotid = -1; |
557134a3 | 4770 | spin_lock_init(&tbl->slot_tbl_lock); |
689cf5c1 | 4771 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
f8625a6a RL |
4772 | |
4773 | tbl = &session->bc_slot_table; | |
9dfdf404 | 4774 | tbl->highest_used_slotid = -1; |
f8625a6a RL |
4775 | spin_lock_init(&tbl->slot_tbl_lock); |
4776 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); | |
4777 | ||
1055d76d TM |
4778 | session->session_state = 1<<NFS4_SESSION_INITING; |
4779 | ||
557134a3 AA |
4780 | session->clp = clp; |
4781 | return session; | |
4782 | } | |
4783 | ||
4784 | void nfs4_destroy_session(struct nfs4_session *session) | |
4785 | { | |
5a0ffe54 AA |
4786 | nfs4_proc_destroy_session(session); |
4787 | dprintk("%s Destroy backchannel for xprt %p\n", | |
4788 | __func__, session->clp->cl_rpcclient->cl_xprt); | |
4789 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, | |
4790 | NFS41_BC_MIN_CALLBACKS); | |
f8625a6a | 4791 | nfs4_destroy_slot_tables(session); |
557134a3 AA |
4792 | kfree(session); |
4793 | } | |
4794 | ||
fc931582 AA |
4795 | /* |
4796 | * Initialize the values to be used by the client in CREATE_SESSION | |
4797 | * If nfs4_init_session set the fore channel request and response sizes, | |
4798 | * use them. | |
4799 | * | |
4800 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4801 | * always set csa_cachethis to FALSE because the current implementation | |
4802 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4803 | */ | |
4804 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4805 | { | |
4806 | struct nfs4_session *session = args->client->cl_session; | |
4807 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4808 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4809 | ||
4810 | if (mxrqst_sz == 0) | |
4811 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4812 | if (mxresp_sz == 0) | |
4813 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4814 | /* Fore channel attributes */ | |
4815 | args->fc_attrs.headerpadsz = 0; | |
4816 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4817 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
fc931582 AA |
4818 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
4819 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4820 | ||
4821 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
8e0d46e1 | 4822 | "max_ops=%u max_reqs=%u\n", |
fc931582 AA |
4823 | __func__, |
4824 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
8e0d46e1 | 4825 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
fc931582 AA |
4826 | |
4827 | /* Back channel attributes */ | |
4828 | args->bc_attrs.headerpadsz = 0; | |
4829 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4830 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4831 | args->bc_attrs.max_resp_sz_cached = 0; | |
4832 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4833 | args->bc_attrs.max_reqs = 1; | |
4834 | ||
4835 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4836 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4837 | __func__, | |
4838 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4839 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4840 | args->bc_attrs.max_reqs); | |
4841 | } | |
4842 | ||
8d35301d AA |
4843 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) |
4844 | { | |
4845 | if (rcvd <= sent) | |
4846 | return 0; | |
4847 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4848 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4849 | return -EINVAL; | |
4850 | } | |
4851 | ||
4852 | #define _verify_fore_channel_attr(_name_) \ | |
4853 | _verify_channel_attr("fore", #_name_, \ | |
4854 | args->fc_attrs._name_, \ | |
4855 | session->fc_attrs._name_) | |
4856 | ||
4857 | #define _verify_back_channel_attr(_name_) \ | |
4858 | _verify_channel_attr("back", #_name_, \ | |
4859 | args->bc_attrs._name_, \ | |
4860 | session->bc_attrs._name_) | |
4861 | ||
4862 | /* | |
4863 | * The server is not allowed to increase the fore channel header pad size, | |
4864 | * maximum response size, or maximum number of operations. | |
4865 | * | |
4866 | * The back channel attributes are only negotiatied down: We send what the | |
4867 | * (back channel) server insists upon. | |
4868 | */ | |
4869 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4870 | struct nfs4_session *session) | |
4871 | { | |
4872 | int ret = 0; | |
4873 | ||
4874 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4875 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4876 | ret |= _verify_fore_channel_attr(max_ops); | |
4877 | ||
4878 | ret |= _verify_back_channel_attr(headerpadsz); | |
4879 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4880 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4881 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4882 | ret |= _verify_back_channel_attr(max_ops); | |
4883 | ret |= _verify_back_channel_attr(max_reqs); | |
4884 | ||
4885 | return ret; | |
4886 | } | |
4887 | ||
fc931582 AA |
4888 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
4889 | { | |
4890 | struct nfs4_session *session = clp->cl_session; | |
4891 | struct nfs41_create_session_args args = { | |
4892 | .client = clp, | |
4893 | .cb_program = NFS4_CALLBACK, | |
4894 | }; | |
4895 | struct nfs41_create_session_res res = { | |
4896 | .client = clp, | |
4897 | }; | |
4898 | struct rpc_message msg = { | |
4899 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4900 | .rpc_argp = &args, | |
4901 | .rpc_resp = &res, | |
4902 | }; | |
4903 | int status; | |
4904 | ||
4905 | nfs4_init_channel_attrs(&args); | |
0f91421e | 4906 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
fc931582 AA |
4907 | |
4908 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4909 | ||
8d35301d AA |
4910 | if (!status) |
4911 | /* Verify the session's negotiated channel_attrs values */ | |
4912 | status = nfs4_verify_channel_attrs(&args, session); | |
fc931582 AA |
4913 | if (!status) { |
4914 | /* Increment the clientid slot sequence id */ | |
4915 | clp->cl_seqid++; | |
4916 | } | |
4917 | ||
4918 | return status; | |
4919 | } | |
4920 | ||
4921 | /* | |
4922 | * Issues a CREATE_SESSION operation to the server. | |
4923 | * It is the responsibility of the caller to verify the session is | |
4924 | * expired before calling this routine. | |
4925 | */ | |
f26468fb | 4926 | int nfs4_proc_create_session(struct nfs_client *clp) |
fc931582 AA |
4927 | { |
4928 | int status; | |
4929 | unsigned *ptr; | |
fc931582 AA |
4930 | struct nfs4_session *session = clp->cl_session; |
4931 | ||
4932 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4933 | ||
4934 | status = _nfs4_proc_create_session(clp); | |
4935 | if (status) | |
4936 | goto out; | |
4937 | ||
f26468fb TM |
4938 | /* Init and reset the fore channel */ |
4939 | status = nfs4_init_slot_tables(session); | |
4940 | dprintk("slot table initialization returned %d\n", status); | |
4941 | if (status) | |
4942 | goto out; | |
4943 | status = nfs4_reset_slot_tables(session); | |
4944 | dprintk("slot table reset returned %d\n", status); | |
fc931582 AA |
4945 | if (status) |
4946 | goto out; | |
4947 | ||
4948 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4949 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4950 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
fc931582 AA |
4951 | out: |
4952 | dprintk("<-- %s\n", __func__); | |
4953 | return status; | |
4954 | } | |
4955 | ||
0f3e66c6 AA |
4956 | /* |
4957 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
4958 | * The caller must serialize access to this routine. | |
4959 | */ | |
4960 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
4961 | { | |
4962 | int status = 0; | |
4963 | struct rpc_message msg; | |
4964 | ||
4965 | dprintk("--> nfs4_proc_destroy_session\n"); | |
4966 | ||
4967 | /* session is still being setup */ | |
4968 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
4969 | return status; | |
4970 | ||
4971 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
4972 | msg.rpc_argp = session; | |
4973 | msg.rpc_resp = NULL; | |
4974 | msg.rpc_cred = NULL; | |
4975 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4976 | ||
4977 | if (status) | |
4978 | printk(KERN_WARNING | |
4979 | "Got error %d from the server on DESTROY_SESSION. " | |
4980 | "Session has been destroyed regardless...\n", status); | |
4981 | ||
4982 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
4983 | return status; | |
4984 | } | |
4985 | ||
fccba804 TM |
4986 | int nfs4_init_session(struct nfs_server *server) |
4987 | { | |
4988 | struct nfs_client *clp = server->nfs_client; | |
2449ea2e | 4989 | struct nfs4_session *session; |
68bf05ef | 4990 | unsigned int rsize, wsize; |
fccba804 TM |
4991 | int ret; |
4992 | ||
4993 | if (!nfs4_has_session(clp)) | |
4994 | return 0; | |
4995 | ||
1055d76d TM |
4996 | session = clp->cl_session; |
4997 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) | |
4998 | return 0; | |
4999 | ||
68bf05ef AA |
5000 | rsize = server->rsize; |
5001 | if (rsize == 0) | |
5002 | rsize = NFS_MAX_FILE_IO_SIZE; | |
5003 | wsize = server->wsize; | |
5004 | if (wsize == 0) | |
5005 | wsize = NFS_MAX_FILE_IO_SIZE; | |
5006 | ||
68bf05ef AA |
5007 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
5008 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; | |
2449ea2e | 5009 | |
fccba804 TM |
5010 | ret = nfs4_recover_expired_lease(server); |
5011 | if (!ret) | |
5012 | ret = nfs4_check_client_ready(clp); | |
5013 | return ret; | |
5014 | } | |
5015 | ||
fc01cea9 AA |
5016 | /* |
5017 | * Renew the cl_session lease. | |
5018 | */ | |
d5f8d3fe TM |
5019 | struct nfs4_sequence_data { |
5020 | struct nfs_client *clp; | |
5021 | struct nfs4_sequence_args args; | |
5022 | struct nfs4_sequence_res res; | |
5023 | }; | |
5024 | ||
dc96aef9 AB |
5025 | static void nfs41_sequence_release(void *data) |
5026 | { | |
d5f8d3fe TM |
5027 | struct nfs4_sequence_data *calldata = data; |
5028 | struct nfs_client *clp = calldata->clp; | |
dc96aef9 | 5029 | |
7135840f AB |
5030 | if (atomic_read(&clp->cl_count) > 1) |
5031 | nfs4_schedule_state_renewal(clp); | |
5032 | nfs_put_client(clp); | |
d5f8d3fe | 5033 | kfree(calldata); |
dc96aef9 AB |
5034 | } |
5035 | ||
aa5190d0 TM |
5036 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5037 | { | |
5038 | switch(task->tk_status) { | |
5039 | case -NFS4ERR_DELAY: | |
aa5190d0 TM |
5040 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
5041 | return -EAGAIN; | |
5042 | default: | |
5043 | nfs4_schedule_state_recovery(clp); | |
5044 | } | |
5045 | return 0; | |
5046 | } | |
5047 | ||
dc96aef9 | 5048 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
fc01cea9 | 5049 | { |
d5f8d3fe TM |
5050 | struct nfs4_sequence_data *calldata = data; |
5051 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 | 5052 | |
14516c3a TM |
5053 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
5054 | return; | |
fc01cea9 AA |
5055 | |
5056 | if (task->tk_status < 0) { | |
5057 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
7135840f AB |
5058 | if (atomic_read(&clp->cl_count) == 1) |
5059 | goto out; | |
fc01cea9 | 5060 | |
aa5190d0 TM |
5061 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
5062 | rpc_restart_call_prepare(task); | |
fc01cea9 AA |
5063 | return; |
5064 | } | |
5065 | } | |
fc01cea9 | 5066 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
7135840f | 5067 | out: |
fc01cea9 AA |
5068 | dprintk("<-- %s\n", __func__); |
5069 | } | |
5070 | ||
5071 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5072 | { | |
d5f8d3fe TM |
5073 | struct nfs4_sequence_data *calldata = data; |
5074 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 AA |
5075 | struct nfs4_sequence_args *args; |
5076 | struct nfs4_sequence_res *res; | |
5077 | ||
fc01cea9 AA |
5078 | args = task->tk_msg.rpc_argp; |
5079 | res = task->tk_msg.rpc_resp; | |
5080 | ||
035168ab | 5081 | if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) |
fc01cea9 AA |
5082 | return; |
5083 | rpc_call_start(task); | |
5084 | } | |
5085 | ||
5086 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5087 | .rpc_call_done = nfs41_sequence_call_done, | |
5088 | .rpc_call_prepare = nfs41_sequence_prepare, | |
dc96aef9 | 5089 | .rpc_release = nfs41_sequence_release, |
fc01cea9 AA |
5090 | }; |
5091 | ||
71ac6da9 | 5092 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
fc01cea9 | 5093 | { |
d5f8d3fe | 5094 | struct nfs4_sequence_data *calldata; |
fc01cea9 AA |
5095 | struct rpc_message msg = { |
5096 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5097 | .rpc_cred = cred, | |
5098 | }; | |
71ac6da9 TM |
5099 | struct rpc_task_setup task_setup_data = { |
5100 | .rpc_client = clp->cl_rpcclient, | |
5101 | .rpc_message = &msg, | |
5102 | .callback_ops = &nfs41_sequence_ops, | |
5103 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, | |
5104 | }; | |
fc01cea9 | 5105 | |
7135840f | 5106 | if (!atomic_inc_not_zero(&clp->cl_count)) |
71ac6da9 | 5107 | return ERR_PTR(-EIO); |
dfb4f309 | 5108 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
d5f8d3fe | 5109 | if (calldata == NULL) { |
7135840f | 5110 | nfs_put_client(clp); |
71ac6da9 | 5111 | return ERR_PTR(-ENOMEM); |
fc01cea9 | 5112 | } |
d5f8d3fe TM |
5113 | msg.rpc_argp = &calldata->args; |
5114 | msg.rpc_resp = &calldata->res; | |
5115 | calldata->clp = clp; | |
71ac6da9 | 5116 | task_setup_data.callback_data = calldata; |
fc01cea9 | 5117 | |
71ac6da9 TM |
5118 | return rpc_run_task(&task_setup_data); |
5119 | } | |
5120 | ||
5121 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5122 | { | |
5123 | struct rpc_task *task; | |
5124 | int ret = 0; | |
5125 | ||
5126 | task = _nfs41_proc_sequence(clp, cred); | |
5127 | if (IS_ERR(task)) | |
5128 | ret = PTR_ERR(task); | |
5129 | else | |
5130 | rpc_put_task(task); | |
5131 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5132 | return ret; | |
5133 | } | |
5134 | ||
5135 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5136 | { | |
5137 | struct rpc_task *task; | |
5138 | int ret; | |
5139 | ||
5140 | task = _nfs41_proc_sequence(clp, cred); | |
5141 | if (IS_ERR(task)) { | |
5142 | ret = PTR_ERR(task); | |
5143 | goto out; | |
5144 | } | |
5145 | ret = rpc_wait_for_completion_task(task); | |
5146 | if (!ret) | |
5147 | ret = task->tk_status; | |
5148 | rpc_put_task(task); | |
5149 | out: | |
5150 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5151 | return ret; | |
fc01cea9 AA |
5152 | } |
5153 | ||
fce5c838 RL |
5154 | struct nfs4_reclaim_complete_data { |
5155 | struct nfs_client *clp; | |
5156 | struct nfs41_reclaim_complete_args arg; | |
5157 | struct nfs41_reclaim_complete_res res; | |
5158 | }; | |
5159 | ||
5160 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5161 | { | |
5162 | struct nfs4_reclaim_complete_data *calldata = data; | |
5163 | ||
b257957e | 5164 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
035168ab TM |
5165 | if (nfs41_setup_sequence(calldata->clp->cl_session, |
5166 | &calldata->arg.seq_args, | |
fce5c838 RL |
5167 | &calldata->res.seq_res, 0, task)) |
5168 | return; | |
5169 | ||
5170 | rpc_call_start(task); | |
5171 | } | |
5172 | ||
aa5190d0 TM |
5173 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5174 | { | |
5175 | switch(task->tk_status) { | |
5176 | case 0: | |
5177 | case -NFS4ERR_COMPLETE_ALREADY: | |
5178 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ | |
5179 | break; | |
5180 | case -NFS4ERR_DELAY: | |
aa5190d0 TM |
5181 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
5182 | return -EAGAIN; | |
5183 | default: | |
5184 | nfs4_schedule_state_recovery(clp); | |
5185 | } | |
5186 | return 0; | |
5187 | } | |
5188 | ||
fce5c838 RL |
5189 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
5190 | { | |
5191 | struct nfs4_reclaim_complete_data *calldata = data; | |
5192 | struct nfs_client *clp = calldata->clp; | |
5193 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5194 | ||
5195 | dprintk("--> %s\n", __func__); | |
14516c3a TM |
5196 | if (!nfs41_sequence_done(task, res)) |
5197 | return; | |
fce5c838 | 5198 | |
aa5190d0 TM |
5199 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
5200 | rpc_restart_call_prepare(task); | |
5201 | return; | |
5202 | } | |
fce5c838 RL |
5203 | dprintk("<-- %s\n", __func__); |
5204 | } | |
5205 | ||
5206 | static void nfs4_free_reclaim_complete_data(void *data) | |
5207 | { | |
5208 | struct nfs4_reclaim_complete_data *calldata = data; | |
5209 | ||
5210 | kfree(calldata); | |
5211 | } | |
5212 | ||
5213 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5214 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5215 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5216 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5217 | }; | |
5218 | ||
5219 | /* | |
5220 | * Issue a global reclaim complete. | |
5221 | */ | |
5222 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5223 | { | |
5224 | struct nfs4_reclaim_complete_data *calldata; | |
5225 | struct rpc_task *task; | |
5226 | struct rpc_message msg = { | |
5227 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5228 | }; | |
5229 | struct rpc_task_setup task_setup_data = { | |
5230 | .rpc_client = clp->cl_rpcclient, | |
5231 | .rpc_message = &msg, | |
5232 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5233 | .flags = RPC_TASK_ASYNC, | |
5234 | }; | |
5235 | int status = -ENOMEM; | |
5236 | ||
5237 | dprintk("--> %s\n", __func__); | |
8535b2be | 5238 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
fce5c838 RL |
5239 | if (calldata == NULL) |
5240 | goto out; | |
5241 | calldata->clp = clp; | |
5242 | calldata->arg.one_fs = 0; | |
fce5c838 RL |
5243 | |
5244 | msg.rpc_argp = &calldata->arg; | |
5245 | msg.rpc_resp = &calldata->res; | |
5246 | task_setup_data.callback_data = calldata; | |
5247 | task = rpc_run_task(&task_setup_data); | |
acf82b85 | 5248 | if (IS_ERR(task)) { |
fce5c838 | 5249 | status = PTR_ERR(task); |
acf82b85 DC |
5250 | goto out; |
5251 | } | |
fce5c838 | 5252 | rpc_put_task(task); |
acf82b85 | 5253 | return 0; |
fce5c838 RL |
5254 | out: |
5255 | dprintk("<-- %s status=%d\n", __func__, status); | |
5256 | return status; | |
5257 | } | |
557134a3 AA |
5258 | #endif /* CONFIG_NFS_V4_1 */ |
5259 | ||
591d71cb | 5260 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
7eff03ae | 5261 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 5262 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
5263 | .recover_open = nfs4_open_reclaim, |
5264 | .recover_lock = nfs4_lock_reclaim, | |
591d71cb | 5265 | .establish_clid = nfs4_init_clientid, |
90a16617 | 5266 | .get_clid_cred = nfs4_get_setclientid_cred, |
1da177e4 LT |
5267 | }; |
5268 | ||
591d71cb AA |
5269 | #if defined(CONFIG_NFS_V4_1) |
5270 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
5271 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
5272 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
5273 | .recover_open = nfs4_open_reclaim, | |
5274 | .recover_lock = nfs4_lock_reclaim, | |
4d643d1d | 5275 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5276 | .get_clid_cred = nfs4_get_exchange_id_cred, |
fce5c838 | 5277 | .reclaim_complete = nfs41_proc_reclaim_complete, |
591d71cb AA |
5278 | }; |
5279 | #endif /* CONFIG_NFS_V4_1 */ | |
5280 | ||
5281 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
5282 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
5283 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
5284 | .recover_open = nfs4_open_expired, | |
5285 | .recover_lock = nfs4_lock_expired, | |
5286 | .establish_clid = nfs4_init_clientid, | |
90a16617 | 5287 | .get_clid_cred = nfs4_get_setclientid_cred, |
591d71cb AA |
5288 | }; |
5289 | ||
5290 | #if defined(CONFIG_NFS_V4_1) | |
5291 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
7eff03ae | 5292 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 5293 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
5294 | .recover_open = nfs4_open_expired, |
5295 | .recover_lock = nfs4_lock_expired, | |
4d643d1d | 5296 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5297 | .get_clid_cred = nfs4_get_exchange_id_cred, |
1da177e4 | 5298 | }; |
591d71cb | 5299 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 | 5300 | |
29fba38b BH |
5301 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
5302 | .sched_state_renewal = nfs4_proc_async_renew, | |
a7b72103 | 5303 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
8e69514f | 5304 | .renew_lease = nfs4_proc_renew, |
29fba38b BH |
5305 | }; |
5306 | ||
5307 | #if defined(CONFIG_NFS_V4_1) | |
5308 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
5309 | .sched_state_renewal = nfs41_proc_async_sequence, | |
a7b72103 | 5310 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
8e69514f | 5311 | .renew_lease = nfs4_proc_sequence, |
29fba38b BH |
5312 | }; |
5313 | #endif | |
5314 | ||
97dc1359 TM |
5315 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
5316 | .minor_version = 0, | |
5317 | .call_sync = _nfs4_call_sync, | |
e047a10c | 5318 | .validate_stateid = nfs4_validate_delegation_stateid, |
c48f4f35 TM |
5319 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
5320 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, | |
5321 | .state_renewal_ops = &nfs40_state_renewal_ops, | |
97dc1359 TM |
5322 | }; |
5323 | ||
5324 | #if defined(CONFIG_NFS_V4_1) | |
5325 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { | |
5326 | .minor_version = 1, | |
5327 | .call_sync = _nfs4_call_sync_session, | |
e047a10c | 5328 | .validate_stateid = nfs41_validate_delegation_stateid, |
c48f4f35 TM |
5329 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
5330 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, | |
5331 | .state_renewal_ops = &nfs41_state_renewal_ops, | |
97dc1359 TM |
5332 | }; |
5333 | #endif | |
5334 | ||
97dc1359 TM |
5335 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
5336 | [0] = &nfs_v4_0_minor_ops, | |
5337 | #if defined(CONFIG_NFS_V4_1) | |
5338 | [1] = &nfs_v4_1_minor_ops, | |
5339 | #endif | |
5340 | }; | |
5341 | ||
92e1d5be | 5342 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
5343 | .permission = nfs_permission, |
5344 | .getattr = nfs_getattr, | |
5345 | .setattr = nfs_setattr, | |
5346 | .getxattr = nfs4_getxattr, | |
5347 | .setxattr = nfs4_setxattr, | |
5348 | .listxattr = nfs4_listxattr, | |
5349 | }; | |
5350 | ||
509de811 | 5351 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
5352 | .version = 4, /* protocol version */ |
5353 | .dentry_ops = &nfs4_dentry_operations, | |
5354 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 5355 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
5356 | .getroot = nfs4_proc_get_root, |
5357 | .getattr = nfs4_proc_getattr, | |
5358 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 5359 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
5360 | .lookup = nfs4_proc_lookup, |
5361 | .access = nfs4_proc_access, | |
5362 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
5363 | .create = nfs4_proc_create, |
5364 | .remove = nfs4_proc_remove, | |
5365 | .unlink_setup = nfs4_proc_unlink_setup, | |
5366 | .unlink_done = nfs4_proc_unlink_done, | |
5367 | .rename = nfs4_proc_rename, | |
d3d4152a JL |
5368 | .rename_setup = nfs4_proc_rename_setup, |
5369 | .rename_done = nfs4_proc_rename_done, | |
1da177e4 LT |
5370 | .link = nfs4_proc_link, |
5371 | .symlink = nfs4_proc_symlink, | |
5372 | .mkdir = nfs4_proc_mkdir, | |
5373 | .rmdir = nfs4_proc_remove, | |
5374 | .readdir = nfs4_proc_readdir, | |
5375 | .mknod = nfs4_proc_mknod, | |
5376 | .statfs = nfs4_proc_statfs, | |
5377 | .fsinfo = nfs4_proc_fsinfo, | |
5378 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 5379 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
5380 | .decode_dirent = nfs4_decode_dirent, |
5381 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 5382 | .read_done = nfs4_read_done, |
1da177e4 | 5383 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 5384 | .write_done = nfs4_write_done, |
1da177e4 | 5385 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 5386 | .commit_done = nfs4_commit_done, |
1da177e4 | 5387 | .lock = nfs4_proc_lock, |
e50a1c2e | 5388 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 5389 | .close_context = nfs4_close_context, |
2b484297 | 5390 | .open_context = nfs4_atomic_open, |
1da177e4 LT |
5391 | }; |
5392 | ||
5393 | /* | |
5394 | * Local variables: | |
5395 | * c-basic-offset: 8 | |
5396 | * End: | |
5397 | */ |