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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
1da177e4 LT |
39 | #include <linux/delay.h> |
40 | #include <linux/errno.h> | |
41 | #include <linux/string.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 LT |
43 | #include <linux/sunrpc/clnt.h> |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
1da177e4 | 48 | #include <linux/namei.h> |
02a913a7 | 49 | #include <linux/mount.h> |
99fe60d0 | 50 | #include <linux/module.h> |
5a0ffe54 | 51 | #include <linux/sunrpc/bc_xprt.h> |
1da177e4 | 52 | |
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 | 54 | #include "delegation.h" |
101070ca | 55 | #include "internal.h" |
006ea73e | 56 | #include "iostat.h" |
fc931582 | 57 | #include "callback.h" |
1da177e4 LT |
58 | |
59 | #define NFSDBG_FACILITY NFSDBG_PROC | |
60 | ||
2066fe89 | 61 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
62 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
63 | ||
a78cb57a TM |
64 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
65 | ||
cdd4e68b | 66 | struct nfs4_opendata; |
864472e9 | 67 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
b257957e | 68 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
1da177e4 | 69 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 70 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
71 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
72 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
0ab64e0e TM |
73 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
74 | struct nfs_fattr *fattr, struct iattr *sattr, | |
75 | struct nfs4_state *state); | |
1da177e4 | 76 | |
1da177e4 | 77 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 78 | static int nfs4_map_errors(int err) |
1da177e4 | 79 | { |
52567b03 TM |
80 | if (err >= -1000) |
81 | return err; | |
82 | switch (err) { | |
83 | case -NFS4ERR_RESOURCE: | |
84 | return -EREMOTEIO; | |
85 | default: | |
1da177e4 | 86 | dprintk("%s could not handle NFSv4 error %d\n", |
3110ff80 | 87 | __func__, -err); |
52567b03 | 88 | break; |
1da177e4 | 89 | } |
52567b03 | 90 | return -EIO; |
1da177e4 LT |
91 | } |
92 | ||
93 | /* | |
94 | * This is our standard bitmap for GETATTR requests. | |
95 | */ | |
96 | const u32 nfs4_fattr_bitmap[2] = { | |
97 | FATTR4_WORD0_TYPE | |
98 | | FATTR4_WORD0_CHANGE | |
99 | | FATTR4_WORD0_SIZE | |
100 | | FATTR4_WORD0_FSID | |
101 | | FATTR4_WORD0_FILEID, | |
102 | FATTR4_WORD1_MODE | |
103 | | FATTR4_WORD1_NUMLINKS | |
104 | | FATTR4_WORD1_OWNER | |
105 | | FATTR4_WORD1_OWNER_GROUP | |
106 | | FATTR4_WORD1_RAWDEV | |
107 | | FATTR4_WORD1_SPACE_USED | |
108 | | FATTR4_WORD1_TIME_ACCESS | |
109 | | FATTR4_WORD1_TIME_METADATA | |
110 | | FATTR4_WORD1_TIME_MODIFY | |
111 | }; | |
112 | ||
113 | const u32 nfs4_statfs_bitmap[2] = { | |
114 | FATTR4_WORD0_FILES_AVAIL | |
115 | | FATTR4_WORD0_FILES_FREE | |
116 | | FATTR4_WORD0_FILES_TOTAL, | |
117 | FATTR4_WORD1_SPACE_AVAIL | |
118 | | FATTR4_WORD1_SPACE_FREE | |
119 | | FATTR4_WORD1_SPACE_TOTAL | |
120 | }; | |
121 | ||
4ce79717 | 122 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
123 | FATTR4_WORD0_MAXLINK |
124 | | FATTR4_WORD0_MAXNAME, | |
125 | 0 | |
126 | }; | |
127 | ||
128 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
129 | | FATTR4_WORD0_MAXREAD | |
130 | | FATTR4_WORD0_MAXWRITE | |
131 | | FATTR4_WORD0_LEASE_TIME, | |
132 | 0 | |
133 | }; | |
134 | ||
830b8e33 MN |
135 | const u32 nfs4_fs_locations_bitmap[2] = { |
136 | FATTR4_WORD0_TYPE | |
137 | | FATTR4_WORD0_CHANGE | |
138 | | FATTR4_WORD0_SIZE | |
139 | | FATTR4_WORD0_FSID | |
140 | | FATTR4_WORD0_FILEID | |
141 | | FATTR4_WORD0_FS_LOCATIONS, | |
142 | FATTR4_WORD1_MODE | |
143 | | FATTR4_WORD1_NUMLINKS | |
144 | | FATTR4_WORD1_OWNER | |
145 | | FATTR4_WORD1_OWNER_GROUP | |
146 | | FATTR4_WORD1_RAWDEV | |
147 | | FATTR4_WORD1_SPACE_USED | |
148 | | FATTR4_WORD1_TIME_ACCESS | |
149 | | FATTR4_WORD1_TIME_METADATA | |
150 | | FATTR4_WORD1_TIME_MODIFY | |
151 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
152 | }; | |
153 | ||
bc4785cd | 154 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
155 | struct nfs4_readdir_arg *readdir) |
156 | { | |
0dbb4c67 | 157 | __be32 *start, *p; |
1da177e4 LT |
158 | |
159 | BUG_ON(readdir->count < 80); | |
160 | if (cookie > 2) { | |
b7ef1956 | 161 | readdir->cookie = cookie; |
1da177e4 LT |
162 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
163 | return; | |
164 | } | |
165 | ||
166 | readdir->cookie = 0; | |
167 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
168 | if (cookie == 2) | |
169 | return; | |
170 | ||
171 | /* | |
172 | * NFSv4 servers do not return entries for '.' and '..' | |
173 | * Therefore, we fake these entries here. We let '.' | |
174 | * have cookie 0 and '..' have cookie 1. Note that | |
175 | * when talking to the server, we always send cookie 0 | |
176 | * instead of 1 or 2. | |
177 | */ | |
0dbb4c67 | 178 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
179 | |
180 | if (cookie == 0) { | |
181 | *p++ = xdr_one; /* next */ | |
182 | *p++ = xdr_zero; /* cookie, first word */ | |
183 | *p++ = xdr_one; /* cookie, second word */ | |
184 | *p++ = xdr_one; /* entry len */ | |
185 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
186 | p++; | |
187 | *p++ = xdr_one; /* bitmap length */ | |
188 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
189 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 190 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
191 | } |
192 | ||
193 | *p++ = xdr_one; /* next */ | |
194 | *p++ = xdr_zero; /* cookie, first word */ | |
195 | *p++ = xdr_two; /* cookie, second word */ | |
196 | *p++ = xdr_two; /* entry len */ | |
197 | memcpy(p, "..\0\0", 4); /* entry */ | |
198 | p++; | |
199 | *p++ = xdr_one; /* bitmap length */ | |
200 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
201 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 202 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
203 | |
204 | readdir->pgbase = (char *)p - (char *)start; | |
205 | readdir->count -= readdir->pgbase; | |
206 | kunmap_atomic(start, KM_USER0); | |
207 | } | |
208 | ||
65de872e TM |
209 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
210 | { | |
211 | int res; | |
212 | ||
213 | might_sleep(); | |
214 | ||
e005e804 | 215 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 216 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
217 | return res; |
218 | } | |
219 | ||
220 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
221 | { | |
222 | int res = 0; | |
223 | ||
224 | might_sleep(); | |
225 | ||
226 | if (*timeout <= 0) | |
227 | *timeout = NFS4_POLL_RETRY_MIN; | |
228 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
229 | *timeout = NFS4_POLL_RETRY_MAX; | |
230 | schedule_timeout_killable(*timeout); | |
231 | if (fatal_signal_pending(current)) | |
232 | res = -ERESTARTSYS; | |
233 | *timeout <<= 1; | |
234 | return res; | |
235 | } | |
236 | ||
237 | /* This is the error handling routine for processes that are allowed | |
238 | * to sleep. | |
239 | */ | |
240 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
241 | { | |
242 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 243 | struct nfs4_state *state = exception->state; |
65de872e TM |
244 | int ret = errorcode; |
245 | ||
246 | exception->retry = 0; | |
247 | switch(errorcode) { | |
248 | case 0: | |
249 | return 0; | |
9e33bed5 TM |
250 | case -NFS4ERR_ADMIN_REVOKED: |
251 | case -NFS4ERR_BAD_STATEID: | |
252 | case -NFS4ERR_OPENMODE: | |
253 | if (state == NULL) | |
254 | break; | |
255 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 256 | goto do_state_recovery; |
65de872e | 257 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
258 | if (state == NULL) |
259 | break; | |
260 | nfs4_state_mark_reclaim_reboot(clp, state); | |
261 | case -NFS4ERR_STALE_CLIENTID: | |
65de872e | 262 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 263 | goto do_state_recovery; |
03391693 | 264 | #if defined(CONFIG_NFS_V4_1) |
4745e315 AA |
265 | case -NFS4ERR_BADSESSION: |
266 | case -NFS4ERR_BADSLOT: | |
267 | case -NFS4ERR_BAD_HIGH_SLOT: | |
268 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
269 | case -NFS4ERR_DEADSESSION: | |
270 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
271 | case -NFS4ERR_SEQ_MISORDERED: | |
272 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
273 | errorcode); | |
0b9e2d41 | 274 | nfs4_schedule_state_recovery(clp); |
4745e315 | 275 | exception->retry = 1; |
b9179237 | 276 | break; |
03391693 | 277 | #endif /* defined(CONFIG_NFS_V4_1) */ |
65de872e | 278 | case -NFS4ERR_FILE_OPEN: |
44ed3556 N |
279 | if (exception->timeout > HZ) { |
280 | /* We have retried a decent amount, time to | |
281 | * fail | |
282 | */ | |
283 | ret = -EBUSY; | |
284 | break; | |
285 | } | |
65de872e TM |
286 | case -NFS4ERR_GRACE: |
287 | case -NFS4ERR_DELAY: | |
2c643488 | 288 | case -EKEYEXPIRED: |
65de872e TM |
289 | ret = nfs4_delay(server->client, &exception->timeout); |
290 | if (ret != 0) | |
291 | break; | |
292 | case -NFS4ERR_OLD_STATEID: | |
293 | exception->retry = 1; | |
294 | } | |
295 | /* We failed to handle the error */ | |
296 | return nfs4_map_errors(ret); | |
a2c0b9e2 TM |
297 | do_state_recovery: |
298 | nfs4_schedule_state_recovery(clp); | |
299 | ret = nfs4_wait_clnt_recover(clp); | |
300 | if (ret == 0) | |
301 | exception->retry = 1; | |
302 | return ret; | |
65de872e TM |
303 | } |
304 | ||
305 | ||
452e9352 | 306 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) |
1da177e4 | 307 | { |
1da177e4 LT |
308 | spin_lock(&clp->cl_lock); |
309 | if (time_before(clp->cl_last_renewal,timestamp)) | |
310 | clp->cl_last_renewal = timestamp; | |
311 | spin_unlock(&clp->cl_lock); | |
312 | } | |
313 | ||
452e9352 TM |
314 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
315 | { | |
316 | do_renew_lease(server->nfs_client, timestamp); | |
317 | } | |
318 | ||
cccef3b9 AA |
319 | #if defined(CONFIG_NFS_V4_1) |
320 | ||
e2c4ab3c AA |
321 | /* |
322 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
323 | * | |
324 | * freeing a slot is trivially done by clearing its respective bit | |
325 | * in the bitmap. | |
326 | * If the freed slotid equals highest_used_slotid we want to update it | |
327 | * so that the server would be able to size down the slot table if needed, | |
328 | * otherwise we know that the highest_used_slotid is still in use. | |
329 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
330 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
331 | * highest slotid in use. | |
332 | * If none found, highest_used_slotid is set to -1. | |
35dc1d74 TM |
333 | * |
334 | * Must be called while holding tbl->slot_tbl_lock | |
e2c4ab3c AA |
335 | */ |
336 | static void | |
337 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
338 | { | |
339 | int slotid = free_slotid; | |
340 | ||
e2c4ab3c AA |
341 | /* clear used bit in bitmap */ |
342 | __clear_bit(slotid, tbl->used_slots); | |
343 | ||
344 | /* update highest_used_slotid when it is freed */ | |
345 | if (slotid == tbl->highest_used_slotid) { | |
346 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
bcb56164 | 347 | if (slotid < tbl->max_slots) |
e2c4ab3c AA |
348 | tbl->highest_used_slotid = slotid; |
349 | else | |
350 | tbl->highest_used_slotid = -1; | |
351 | } | |
e2c4ab3c AA |
352 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
353 | free_slotid, tbl->highest_used_slotid); | |
354 | } | |
355 | ||
3bfb0fc5 AB |
356 | /* |
357 | * Signal state manager thread if session is drained | |
358 | */ | |
359 | static void nfs41_check_drain_session_complete(struct nfs4_session *ses) | |
360 | { | |
689cf5c1 AB |
361 | struct rpc_task *task; |
362 | ||
a2118c33 | 363 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
689cf5c1 AB |
364 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
365 | if (task) | |
366 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
3bfb0fc5 AB |
367 | return; |
368 | } | |
369 | ||
370 | if (ses->fc_slot_table.highest_used_slotid != -1) | |
371 | return; | |
372 | ||
373 | dprintk("%s COMPLETE: Session Drained\n", __func__); | |
374 | complete(&ses->complete); | |
375 | } | |
376 | ||
d185a334 | 377 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) |
13615871 AA |
378 | { |
379 | struct nfs4_slot_table *tbl; | |
380 | ||
d185a334 | 381 | tbl = &res->sr_session->fc_slot_table; |
13615871 | 382 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { |
13615871 AA |
383 | /* just wake up the next guy waiting since |
384 | * we may have not consumed a slot after all */ | |
691daf3b | 385 | dprintk("%s: No slot\n", __func__); |
35dc1d74 | 386 | return; |
13615871 | 387 | } |
ea028ac9 | 388 | |
35dc1d74 TM |
389 | spin_lock(&tbl->slot_tbl_lock); |
390 | nfs4_free_slot(tbl, res->sr_slotid); | |
d185a334 | 391 | nfs41_check_drain_session_complete(res->sr_session); |
35dc1d74 TM |
392 | spin_unlock(&tbl->slot_tbl_lock); |
393 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
13615871 AA |
394 | } |
395 | ||
14516c3a | 396 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) |
b0df806c AA |
397 | { |
398 | unsigned long timestamp; | |
399 | struct nfs4_slot_table *tbl; | |
400 | struct nfs4_slot *slot; | |
14516c3a | 401 | struct nfs_client *clp; |
b0df806c AA |
402 | |
403 | /* | |
404 | * sr_status remains 1 if an RPC level error occurred. The server | |
405 | * may or may not have processed the sequence operation.. | |
406 | * Proceed as if the server received and processed the sequence | |
407 | * operation. | |
408 | */ | |
409 | if (res->sr_status == 1) | |
410 | res->sr_status = NFS_OK; | |
411 | ||
412 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
413 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
414 | goto out; | |
415 | ||
14516c3a TM |
416 | tbl = &res->sr_session->fc_slot_table; |
417 | slot = tbl->slots + res->sr_slotid; | |
418 | ||
691daf3b | 419 | /* Check the SEQUENCE operation status */ |
14516c3a TM |
420 | switch (res->sr_status) { |
421 | case 0: | |
b0df806c AA |
422 | /* Update the slot's sequence and clientid lease timer */ |
423 | ++slot->seq_nr; | |
424 | timestamp = res->sr_renewal_time; | |
14516c3a | 425 | clp = res->sr_session->clp; |
452e9352 | 426 | do_renew_lease(clp, timestamp); |
0629e370 | 427 | /* Check sequence flags */ |
7135840f AB |
428 | if (atomic_read(&clp->cl_count) > 1) |
429 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
14516c3a TM |
430 | break; |
431 | case -NFS4ERR_DELAY: | |
432 | /* The server detected a resend of the RPC call and | |
433 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 | |
434 | * of RFC5661. | |
435 | */ | |
436 | dprintk("%s: slot=%d seq=%d: Operation in progress\n", | |
437 | __func__, res->sr_slotid, slot->seq_nr); | |
438 | goto out_retry; | |
439 | default: | |
440 | /* Just update the slot sequence no. */ | |
441 | ++slot->seq_nr; | |
b0df806c AA |
442 | } |
443 | out: | |
444 | /* The session may be reset by one of the error handlers. */ | |
445 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
d185a334 | 446 | nfs41_sequence_free_slot(res); |
14516c3a TM |
447 | return 1; |
448 | out_retry: | |
d05dd4e9 | 449 | if (!rpc_restart_call(task)) |
14516c3a TM |
450 | goto out; |
451 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
452 | return 0; | |
b0df806c AA |
453 | } |
454 | ||
14516c3a TM |
455 | static int nfs4_sequence_done(struct rpc_task *task, |
456 | struct nfs4_sequence_res *res) | |
df896455 | 457 | { |
14516c3a TM |
458 | if (res->sr_session == NULL) |
459 | return 1; | |
460 | return nfs41_sequence_done(task, res); | |
df896455 TM |
461 | } |
462 | ||
510b8175 BH |
463 | /* |
464 | * nfs4_find_slot - efficiently look for a free slot | |
465 | * | |
466 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
467 | * If found, we mark the slot as used, update the highest_used_slotid, | |
468 | * and respectively set up the sequence operation args. | |
469 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
470 | * |
471 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
472 | */ |
473 | static u8 | |
40ead580 | 474 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
510b8175 BH |
475 | { |
476 | int slotid; | |
477 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
478 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
479 | ||
510b8175 BH |
480 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
481 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
482 | tbl->max_slots); | |
483 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
484 | if (slotid >= tbl->max_slots) | |
485 | goto out; | |
486 | __set_bit(slotid, tbl->used_slots); | |
487 | if (slotid > tbl->highest_used_slotid) | |
488 | tbl->highest_used_slotid = slotid; | |
489 | ret_id = slotid; | |
490 | out: | |
491 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
492 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
493 | return ret_id; |
494 | } | |
495 | ||
ce5039c1 AA |
496 | static int nfs41_setup_sequence(struct nfs4_session *session, |
497 | struct nfs4_sequence_args *args, | |
498 | struct nfs4_sequence_res *res, | |
499 | int cache_reply, | |
500 | struct rpc_task *task) | |
501 | { | |
fbcd4abc AA |
502 | struct nfs4_slot *slot; |
503 | struct nfs4_slot_table *tbl; | |
504 | u8 slotid; | |
505 | ||
506 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
507 | /* slot already allocated? */ |
508 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
509 | return 0; | |
510 | ||
ce5039c1 | 511 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; |
fbcd4abc AA |
512 | tbl = &session->fc_slot_table; |
513 | ||
514 | spin_lock(&tbl->slot_tbl_lock); | |
a2118c33 | 515 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && |
5601a00d | 516 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { |
ea028ac9 AA |
517 | /* |
518 | * The state manager will wait until the slot table is empty. | |
519 | * Schedule the reset thread | |
520 | */ | |
05f0d236 | 521 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
b069d94a | 522 | spin_unlock(&tbl->slot_tbl_lock); |
bcb56164 | 523 | dprintk("%s Schedule Session Reset\n", __func__); |
05f0d236 | 524 | return -EAGAIN; |
b069d94a AA |
525 | } |
526 | ||
689cf5c1 AB |
527 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
528 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
529 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
530 | spin_unlock(&tbl->slot_tbl_lock); | |
531 | dprintk("%s enforce FIFO order\n", __func__); | |
532 | return -EAGAIN; | |
533 | } | |
534 | ||
40ead580 | 535 | slotid = nfs4_find_slot(tbl); |
fbcd4abc AA |
536 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
537 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
538 | spin_unlock(&tbl->slot_tbl_lock); | |
539 | dprintk("<-- %s: no free slots\n", __func__); | |
540 | return -EAGAIN; | |
541 | } | |
542 | spin_unlock(&tbl->slot_tbl_lock); | |
543 | ||
689cf5c1 | 544 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
fbcd4abc | 545 | slot = tbl->slots + slotid; |
99fe60d0 | 546 | args->sa_session = session; |
fbcd4abc AA |
547 | args->sa_slotid = slotid; |
548 | args->sa_cache_this = cache_reply; | |
549 | ||
550 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
551 | ||
99fe60d0 | 552 | res->sr_session = session; |
fbcd4abc AA |
553 | res->sr_slotid = slotid; |
554 | res->sr_renewal_time = jiffies; | |
2a6e26cd | 555 | res->sr_status_flags = 0; |
fbcd4abc AA |
556 | /* |
557 | * sr_status is only set in decode_sequence, and so will remain | |
558 | * set to 1 if an rpc level failure occurs. | |
559 | */ | |
560 | res->sr_status = 1; | |
ce5039c1 AA |
561 | return 0; |
562 | } | |
563 | ||
035168ab | 564 | int nfs4_setup_sequence(const struct nfs_server *server, |
ce5039c1 AA |
565 | struct nfs4_sequence_args *args, |
566 | struct nfs4_sequence_res *res, | |
567 | int cache_reply, | |
568 | struct rpc_task *task) | |
569 | { | |
035168ab | 570 | struct nfs4_session *session = nfs4_get_session(server); |
ce5039c1 AA |
571 | int ret = 0; |
572 | ||
035168ab TM |
573 | if (session == NULL) { |
574 | args->sa_session = NULL; | |
575 | res->sr_session = NULL; | |
576 | goto out; | |
577 | } | |
578 | ||
ce5039c1 | 579 | dprintk("--> %s clp %p session %p sr_slotid %d\n", |
035168ab | 580 | __func__, session->clp, session, res->sr_slotid); |
ce5039c1 | 581 | |
035168ab | 582 | ret = nfs41_setup_sequence(session, args, res, cache_reply, |
ce5039c1 | 583 | task); |
ce5039c1 AA |
584 | out: |
585 | dprintk("<-- %s status=%d\n", __func__, ret); | |
586 | return ret; | |
587 | } | |
588 | ||
589 | struct nfs41_call_sync_data { | |
035168ab | 590 | const struct nfs_server *seq_server; |
ce5039c1 AA |
591 | struct nfs4_sequence_args *seq_args; |
592 | struct nfs4_sequence_res *seq_res; | |
593 | int cache_reply; | |
594 | }; | |
595 | ||
596 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
597 | { | |
598 | struct nfs41_call_sync_data *data = calldata; | |
599 | ||
035168ab TM |
600 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); |
601 | ||
602 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, | |
ce5039c1 AA |
603 | data->seq_res, data->cache_reply, task)) |
604 | return; | |
605 | rpc_call_start(task); | |
606 | } | |
607 | ||
b257957e AB |
608 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
609 | { | |
610 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
611 | nfs41_call_sync_prepare(task, calldata); | |
612 | } | |
613 | ||
69ab40c4 AA |
614 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
615 | { | |
616 | struct nfs41_call_sync_data *data = calldata; | |
617 | ||
14516c3a | 618 | nfs41_sequence_done(task, data->seq_res); |
69ab40c4 AA |
619 | } |
620 | ||
ce5039c1 AA |
621 | struct rpc_call_ops nfs41_call_sync_ops = { |
622 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 623 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
624 | }; |
625 | ||
b257957e AB |
626 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
627 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, | |
628 | .rpc_call_done = nfs41_call_sync_done, | |
629 | }; | |
630 | ||
035168ab | 631 | static int nfs4_call_sync_sequence(struct nfs_server *server, |
ce5039c1 AA |
632 | struct rpc_message *msg, |
633 | struct nfs4_sequence_args *args, | |
634 | struct nfs4_sequence_res *res, | |
b257957e AB |
635 | int cache_reply, |
636 | int privileged) | |
ce5039c1 AA |
637 | { |
638 | int ret; | |
639 | struct rpc_task *task; | |
640 | struct nfs41_call_sync_data data = { | |
035168ab | 641 | .seq_server = server, |
ce5039c1 AA |
642 | .seq_args = args, |
643 | .seq_res = res, | |
644 | .cache_reply = cache_reply, | |
645 | }; | |
646 | struct rpc_task_setup task_setup = { | |
035168ab | 647 | .rpc_client = server->client, |
ce5039c1 AA |
648 | .rpc_message = msg, |
649 | .callback_ops = &nfs41_call_sync_ops, | |
650 | .callback_data = &data | |
651 | }; | |
652 | ||
653 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
b257957e AB |
654 | if (privileged) |
655 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; | |
ce5039c1 AA |
656 | task = rpc_run_task(&task_setup); |
657 | if (IS_ERR(task)) | |
658 | ret = PTR_ERR(task); | |
659 | else { | |
660 | ret = task->tk_status; | |
661 | rpc_put_task(task); | |
662 | } | |
663 | return ret; | |
664 | } | |
665 | ||
cccef3b9 AA |
666 | int _nfs4_call_sync_session(struct nfs_server *server, |
667 | struct rpc_message *msg, | |
668 | struct nfs4_sequence_args *args, | |
669 | struct nfs4_sequence_res *res, | |
670 | int cache_reply) | |
671 | { | |
035168ab | 672 | return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0); |
cccef3b9 AA |
673 | } |
674 | ||
df896455 | 675 | #else |
14516c3a TM |
676 | static int nfs4_sequence_done(struct rpc_task *task, |
677 | struct nfs4_sequence_res *res) | |
df896455 | 678 | { |
14516c3a | 679 | return 1; |
df896455 | 680 | } |
cccef3b9 AA |
681 | #endif /* CONFIG_NFS_V4_1 */ |
682 | ||
683 | int _nfs4_call_sync(struct nfs_server *server, | |
684 | struct rpc_message *msg, | |
685 | struct nfs4_sequence_args *args, | |
686 | struct nfs4_sequence_res *res, | |
687 | int cache_reply) | |
688 | { | |
f3752975 | 689 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
690 | return rpc_call_sync(server->client, msg, 0); |
691 | } | |
692 | ||
693 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
97dc1359 | 694 | (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \ |
cccef3b9 AA |
695 | &(res)->seq_res, (cache_reply)) |
696 | ||
38478b24 | 697 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 698 | { |
38478b24 | 699 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 700 | |
38478b24 | 701 | spin_lock(&dir->i_lock); |
40d24704 TM |
702 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
703 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 704 | nfs_force_lookup_revalidate(dir); |
40d24704 | 705 | nfsi->change_attr = cinfo->after; |
38478b24 | 706 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
707 | } |
708 | ||
e56e0b78 | 709 | struct nfs4_opendata { |
c6d00e63 | 710 | struct kref kref; |
e56e0b78 TM |
711 | struct nfs_openargs o_arg; |
712 | struct nfs_openres o_res; | |
cdd4e68b TM |
713 | struct nfs_open_confirmargs c_arg; |
714 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
715 | struct nfs_fattr f_attr; |
716 | struct nfs_fattr dir_attr; | |
ad389da7 | 717 | struct path path; |
e56e0b78 TM |
718 | struct dentry *dir; |
719 | struct nfs4_state_owner *owner; | |
aac00a8d | 720 | struct nfs4_state *state; |
e56e0b78 | 721 | struct iattr attrs; |
26e976a8 | 722 | unsigned long timestamp; |
3e309914 | 723 | unsigned int rpc_done : 1; |
24ac23ab TM |
724 | int rpc_status; |
725 | int cancelled; | |
e56e0b78 TM |
726 | }; |
727 | ||
2ced46c2 TM |
728 | |
729 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
730 | { | |
731 | p->o_res.f_attr = &p->f_attr; | |
732 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
733 | p->o_res.seqid = p->o_arg.seqid; |
734 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
735 | p->o_res.server = p->o_arg.server; |
736 | nfs_fattr_init(&p->f_attr); | |
737 | nfs_fattr_init(&p->dir_attr); | |
578e4585 | 738 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
2ced46c2 TM |
739 | } |
740 | ||
ad389da7 | 741 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 742 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
8535b2be TM |
743 | const struct iattr *attrs, |
744 | gfp_t gfp_mask) | |
e56e0b78 | 745 | { |
ad389da7 | 746 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
747 | struct inode *dir = parent->d_inode; |
748 | struct nfs_server *server = NFS_SERVER(dir); | |
749 | struct nfs4_opendata *p; | |
750 | ||
8535b2be | 751 | p = kzalloc(sizeof(*p), gfp_mask); |
e56e0b78 TM |
752 | if (p == NULL) |
753 | goto err; | |
8535b2be | 754 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); |
e56e0b78 TM |
755 | if (p->o_arg.seqid == NULL) |
756 | goto err_free; | |
f6948697 AV |
757 | path_get(path); |
758 | p->path = *path; | |
e56e0b78 TM |
759 | p->dir = parent; |
760 | p->owner = sp; | |
761 | atomic_inc(&sp->so_count); | |
762 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
763 | p->o_arg.open_flags = flags; |
764 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 765 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 766 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 767 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
768 | p->o_arg.server = server; |
769 | p->o_arg.bitmask = server->attr_bitmask; | |
770 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
d77d76ff TM |
771 | if (flags & O_CREAT) { |
772 | u32 *s; | |
773 | ||
e56e0b78 TM |
774 | p->o_arg.u.attrs = &p->attrs; |
775 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
d77d76ff TM |
776 | s = (u32 *) p->o_arg.u.verifier.data; |
777 | s[0] = jiffies; | |
778 | s[1] = current->pid; | |
e56e0b78 | 779 | } |
cdd4e68b TM |
780 | p->c_arg.fh = &p->o_res.fh; |
781 | p->c_arg.stateid = &p->o_res.stateid; | |
782 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 783 | nfs4_init_opendata_res(p); |
c6d00e63 | 784 | kref_init(&p->kref); |
e56e0b78 TM |
785 | return p; |
786 | err_free: | |
787 | kfree(p); | |
788 | err: | |
789 | dput(parent); | |
790 | return NULL; | |
791 | } | |
792 | ||
c6d00e63 | 793 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 794 | { |
c6d00e63 TM |
795 | struct nfs4_opendata *p = container_of(kref, |
796 | struct nfs4_opendata, kref); | |
797 | ||
798 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
799 | if (p->state != NULL) |
800 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
801 | nfs4_put_state_owner(p->owner); |
802 | dput(p->dir); | |
31f31db1 | 803 | path_put(&p->path); |
c6d00e63 TM |
804 | kfree(p); |
805 | } | |
806 | ||
807 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
808 | { | |
809 | if (p != NULL) | |
810 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
811 | } |
812 | ||
06f814a3 TM |
813 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
814 | { | |
06f814a3 TM |
815 | int ret; |
816 | ||
06f814a3 | 817 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
818 | return ret; |
819 | } | |
820 | ||
dc0b027d | 821 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
822 | { |
823 | int ret = 0; | |
dc0b027d TM |
824 | |
825 | if (open_mode & O_EXCL) | |
826 | goto out; | |
827 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 | 828 | case FMODE_READ: |
88069f77 TM |
829 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
830 | && state->n_rdonly != 0; | |
6ee41268 TM |
831 | break; |
832 | case FMODE_WRITE: | |
88069f77 TM |
833 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
834 | && state->n_wronly != 0; | |
6ee41268 TM |
835 | break; |
836 | case FMODE_READ|FMODE_WRITE: | |
88069f77 TM |
837 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
838 | && state->n_rdwr != 0; | |
6ee41268 | 839 | } |
dc0b027d | 840 | out: |
6ee41268 TM |
841 | return ret; |
842 | } | |
843 | ||
dc0b027d | 844 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 845 | { |
dc0b027d | 846 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 847 | return 0; |
15c831bf | 848 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 849 | return 0; |
b7391f44 | 850 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
851 | return 1; |
852 | } | |
853 | ||
dc0b027d | 854 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 855 | { |
dc0b027d | 856 | switch (fmode) { |
e7616923 TM |
857 | case FMODE_WRITE: |
858 | state->n_wronly++; | |
859 | break; | |
860 | case FMODE_READ: | |
861 | state->n_rdonly++; | |
862 | break; | |
863 | case FMODE_READ|FMODE_WRITE: | |
864 | state->n_rdwr++; | |
865 | } | |
dc0b027d | 866 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
867 | } |
868 | ||
dc0b027d | 869 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
870 | { |
871 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
872 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
873 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 874 | switch (fmode) { |
003707c7 TM |
875 | case FMODE_READ: |
876 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
877 | break; | |
878 | case FMODE_WRITE: | |
879 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
880 | break; | |
881 | case FMODE_READ|FMODE_WRITE: | |
882 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
883 | } | |
e7616923 TM |
884 | } |
885 | ||
dc0b027d | 886 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 887 | { |
8bda4e4c | 888 | write_seqlock(&state->seqlock); |
dc0b027d | 889 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 890 | write_sequnlock(&state->seqlock); |
003707c7 TM |
891 | } |
892 | ||
dc0b027d | 893 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 894 | { |
8bda4e4c TM |
895 | /* |
896 | * Protect the call to nfs4_state_set_mode_locked and | |
897 | * serialise the stateid update | |
898 | */ | |
899 | write_seqlock(&state->seqlock); | |
003707c7 TM |
900 | if (deleg_stateid != NULL) { |
901 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
902 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
903 | } | |
904 | if (open_stateid != NULL) | |
dc0b027d | 905 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
906 | write_sequnlock(&state->seqlock); |
907 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 908 | update_open_stateflags(state, fmode); |
ec073428 | 909 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
910 | } |
911 | ||
dc0b027d | 912 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
913 | { |
914 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
915 | struct nfs_delegation *deleg_cur; | |
916 | int ret = 0; | |
917 | ||
dc0b027d | 918 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
919 | |
920 | rcu_read_lock(); | |
921 | deleg_cur = rcu_dereference(nfsi->delegation); | |
922 | if (deleg_cur == NULL) | |
923 | goto no_delegation; | |
924 | ||
925 | spin_lock(&deleg_cur->lock); | |
926 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 927 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
928 | goto no_delegation_unlock; |
929 | ||
930 | if (delegation == NULL) | |
931 | delegation = &deleg_cur->stateid; | |
932 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
933 | goto no_delegation_unlock; | |
934 | ||
b7391f44 | 935 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 936 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
937 | ret = 1; |
938 | no_delegation_unlock: | |
939 | spin_unlock(&deleg_cur->lock); | |
940 | no_delegation: | |
941 | rcu_read_unlock(); | |
942 | ||
943 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 944 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
945 | ret = 1; |
946 | } | |
947 | ||
948 | return ret; | |
949 | } | |
950 | ||
951 | ||
dc0b027d | 952 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
953 | { |
954 | struct nfs_delegation *delegation; | |
955 | ||
956 | rcu_read_lock(); | |
957 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 958 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
959 | rcu_read_unlock(); |
960 | return; | |
961 | } | |
962 | rcu_read_unlock(); | |
963 | nfs_inode_return_delegation(inode); | |
964 | } | |
965 | ||
6ee41268 | 966 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
967 | { |
968 | struct nfs4_state *state = opendata->state; | |
969 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
970 | struct nfs_delegation *delegation; | |
dc0b027d TM |
971 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
972 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
973 | nfs4_stateid stateid; |
974 | int ret = -EAGAIN; | |
975 | ||
aac00a8d | 976 | for (;;) { |
dc0b027d | 977 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 978 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
979 | if (can_open_cached(state, fmode, open_mode)) { |
980 | update_open_stateflags(state, fmode); | |
6ee41268 | 981 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
982 | goto out_return_state; |
983 | } | |
984 | spin_unlock(&state->owner->so_lock); | |
985 | } | |
34310430 TM |
986 | rcu_read_lock(); |
987 | delegation = rcu_dereference(nfsi->delegation); | |
988 | if (delegation == NULL || | |
dc0b027d | 989 | !can_open_delegated(delegation, fmode)) { |
34310430 | 990 | rcu_read_unlock(); |
aac00a8d | 991 | break; |
34310430 | 992 | } |
aac00a8d TM |
993 | /* Save the delegation */ |
994 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
995 | rcu_read_unlock(); | |
af22f94a | 996 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
997 | if (ret != 0) |
998 | goto out; | |
999 | ret = -EAGAIN; | |
34310430 TM |
1000 | |
1001 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 1002 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 1003 | goto out_return_state; |
aac00a8d | 1004 | } |
aac00a8d TM |
1005 | out: |
1006 | return ERR_PTR(ret); | |
1007 | out_return_state: | |
1008 | atomic_inc(&state->count); | |
1009 | return state; | |
1010 | } | |
1011 | ||
24ac23ab TM |
1012 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
1013 | { | |
1014 | struct inode *inode; | |
1015 | struct nfs4_state *state = NULL; | |
003707c7 | 1016 | struct nfs_delegation *delegation; |
1b370bc2 | 1017 | int ret; |
24ac23ab | 1018 | |
aac00a8d | 1019 | if (!data->rpc_done) { |
6ee41268 | 1020 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
1021 | goto out; |
1022 | } | |
1023 | ||
1b370bc2 | 1024 | ret = -EAGAIN; |
24ac23ab | 1025 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 1026 | goto err; |
24ac23ab | 1027 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 1028 | ret = PTR_ERR(inode); |
03f28e3a | 1029 | if (IS_ERR(inode)) |
1b370bc2 TM |
1030 | goto err; |
1031 | ret = -ENOMEM; | |
24ac23ab TM |
1032 | state = nfs4_get_open_state(inode, data->owner); |
1033 | if (state == NULL) | |
1b370bc2 | 1034 | goto err_put_inode; |
549d6ed5 | 1035 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
1036 | int delegation_flags = 0; |
1037 | ||
003707c7 TM |
1038 | rcu_read_lock(); |
1039 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1040 | if (delegation) | |
1041 | delegation_flags = delegation->flags; | |
1042 | rcu_read_unlock(); | |
15c831bf | 1043 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
1044 | nfs_inode_set_delegation(state->inode, |
1045 | data->owner->so_cred, | |
1046 | &data->o_res); | |
1047 | else | |
1048 | nfs_inode_reclaim_delegation(state->inode, | |
1049 | data->owner->so_cred, | |
1050 | &data->o_res); | |
1051 | } | |
34310430 TM |
1052 | |
1053 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 1054 | data->o_arg.fmode); |
24ac23ab | 1055 | iput(inode); |
aac00a8d | 1056 | out: |
24ac23ab | 1057 | return state; |
1b370bc2 TM |
1058 | err_put_inode: |
1059 | iput(inode); | |
1060 | err: | |
1061 | return ERR_PTR(ret); | |
24ac23ab TM |
1062 | } |
1063 | ||
864472e9 TM |
1064 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
1065 | { | |
1066 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1067 | struct nfs_open_context *ctx; | |
1068 | ||
1069 | spin_lock(&state->inode->i_lock); | |
1070 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1071 | if (ctx->state != state) | |
1072 | continue; | |
1073 | get_nfs_open_context(ctx); | |
1074 | spin_unlock(&state->inode->i_lock); | |
1075 | return ctx; | |
1076 | } | |
1077 | spin_unlock(&state->inode->i_lock); | |
1078 | return ERR_PTR(-ENOENT); | |
1079 | } | |
1080 | ||
6f220ed5 TM |
1081 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
1082 | { | |
1083 | struct nfs4_opendata *opendata; | |
1084 | ||
8535b2be | 1085 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS); |
6f220ed5 TM |
1086 | if (opendata == NULL) |
1087 | return ERR_PTR(-ENOMEM); | |
1088 | opendata->state = state; | |
1089 | atomic_inc(&state->count); | |
1090 | return opendata; | |
1091 | } | |
1092 | ||
dc0b027d | 1093 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 1094 | { |
2ced46c2 | 1095 | struct nfs4_state *newstate; |
864472e9 TM |
1096 | int ret; |
1097 | ||
dc0b027d TM |
1098 | opendata->o_arg.open_flags = 0; |
1099 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
1100 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
1101 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1102 | nfs4_init_opendata_res(opendata); | |
b257957e | 1103 | ret = _nfs4_recover_proc_open(opendata); |
864472e9 TM |
1104 | if (ret != 0) |
1105 | return ret; | |
2ced46c2 | 1106 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1107 | if (IS_ERR(newstate)) |
1108 | return PTR_ERR(newstate); | |
dc0b027d | 1109 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 1110 | *res = newstate; |
864472e9 TM |
1111 | return 0; |
1112 | } | |
1113 | ||
1114 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1115 | { | |
864472e9 | 1116 | struct nfs4_state *newstate; |
864472e9 TM |
1117 | int ret; |
1118 | ||
1119 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1120 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1121 | smp_rmb(); |
1122 | if (state->n_rdwr != 0) { | |
2ced46c2 | 1123 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1124 | if (ret != 0) |
1125 | return ret; | |
2ced46c2 TM |
1126 | if (newstate != state) |
1127 | return -ESTALE; | |
864472e9 TM |
1128 | } |
1129 | if (state->n_wronly != 0) { | |
2ced46c2 | 1130 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1131 | if (ret != 0) |
1132 | return ret; | |
2ced46c2 TM |
1133 | if (newstate != state) |
1134 | return -ESTALE; | |
864472e9 TM |
1135 | } |
1136 | if (state->n_rdonly != 0) { | |
2ced46c2 | 1137 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1138 | if (ret != 0) |
1139 | return ret; | |
2ced46c2 TM |
1140 | if (newstate != state) |
1141 | return -ESTALE; | |
864472e9 | 1142 | } |
1ac7e2fd TM |
1143 | /* |
1144 | * We may have performed cached opens for all three recoveries. | |
1145 | * Check if we need to update the current stateid. | |
1146 | */ | |
1147 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1148 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1149 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1150 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1151 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1152 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1153 | } |
864472e9 TM |
1154 | return 0; |
1155 | } | |
1156 | ||
1da177e4 LT |
1157 | /* |
1158 | * OPEN_RECLAIM: | |
1159 | * reclaim state on the server after a reboot. | |
1da177e4 | 1160 | */ |
539cd03a | 1161 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1162 | { |
1ac7e2fd | 1163 | struct nfs_delegation *delegation; |
864472e9 | 1164 | struct nfs4_opendata *opendata; |
dc0b027d | 1165 | fmode_t delegation_type = 0; |
1da177e4 LT |
1166 | int status; |
1167 | ||
6f220ed5 TM |
1168 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1169 | if (IS_ERR(opendata)) | |
1170 | return PTR_ERR(opendata); | |
864472e9 TM |
1171 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1172 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1173 | rcu_read_lock(); |
1174 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1175 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1176 | delegation_type = delegation->type; |
1ac7e2fd | 1177 | rcu_read_unlock(); |
864472e9 TM |
1178 | opendata->o_arg.u.delegation_type = delegation_type; |
1179 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1180 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1181 | return status; |
1182 | } | |
1183 | ||
539cd03a | 1184 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1185 | { |
1186 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1187 | struct nfs4_exception exception = { }; | |
1188 | int err; | |
1189 | do { | |
539cd03a | 1190 | err = _nfs4_do_open_reclaim(ctx, state); |
2c643488 | 1191 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
1192 | break; |
1193 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1194 | } while (exception.retry); |
1195 | return err; | |
1196 | } | |
1197 | ||
864472e9 TM |
1198 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1199 | { | |
1200 | struct nfs_open_context *ctx; | |
1201 | int ret; | |
1202 | ||
1203 | ctx = nfs4_state_find_open_context(state); | |
1204 | if (IS_ERR(ctx)) | |
1205 | return PTR_ERR(ctx); | |
539cd03a | 1206 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1207 | put_nfs_open_context(ctx); |
1208 | return ret; | |
1209 | } | |
1210 | ||
13437e12 | 1211 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1212 | { |
e56e0b78 | 1213 | struct nfs4_opendata *opendata; |
864472e9 | 1214 | int ret; |
1da177e4 | 1215 | |
6f220ed5 TM |
1216 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1217 | if (IS_ERR(opendata)) | |
1218 | return PTR_ERR(opendata); | |
e56e0b78 | 1219 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1220 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1221 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1222 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1223 | nfs4_opendata_put(opendata); |
864472e9 | 1224 | return ret; |
1da177e4 LT |
1225 | } |
1226 | ||
13437e12 | 1227 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1228 | { |
1229 | struct nfs4_exception exception = { }; | |
539cd03a | 1230 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1231 | int err; |
1232 | do { | |
13437e12 | 1233 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1234 | switch (err) { |
1235 | case 0: | |
965b5d67 TM |
1236 | case -ENOENT: |
1237 | case -ESTALE: | |
1238 | goto out; | |
bcfa49f6 RL |
1239 | case -NFS4ERR_BADSESSION: |
1240 | case -NFS4ERR_BADSLOT: | |
1241 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1242 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1243 | case -NFS4ERR_DEADSESSION: | |
1244 | nfs4_schedule_state_recovery( | |
1245 | server->nfs_client); | |
1246 | goto out; | |
1da177e4 LT |
1247 | case -NFS4ERR_STALE_CLIENTID: |
1248 | case -NFS4ERR_STALE_STATEID: | |
1249 | case -NFS4ERR_EXPIRED: | |
1250 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1251 | nfs4_schedule_state_recovery(server->nfs_client); |
965b5d67 TM |
1252 | goto out; |
1253 | case -ERESTARTSYS: | |
1254 | /* | |
1255 | * The show must go on: exit, but mark the | |
1256 | * stateid as needing recovery. | |
1257 | */ | |
1258 | case -NFS4ERR_ADMIN_REVOKED: | |
1259 | case -NFS4ERR_BAD_STATEID: | |
1260 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
1261 | case -ENOMEM: | |
1262 | err = 0; | |
1263 | goto out; | |
1da177e4 LT |
1264 | } |
1265 | err = nfs4_handle_exception(server, err, &exception); | |
1266 | } while (exception.retry); | |
965b5d67 | 1267 | out: |
1da177e4 LT |
1268 | return err; |
1269 | } | |
1270 | ||
cdd4e68b TM |
1271 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1272 | { | |
1273 | struct nfs4_opendata *data = calldata; | |
1274 | ||
1275 | data->rpc_status = task->tk_status; | |
26e976a8 | 1276 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1277 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1278 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1279 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1280 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1281 | data->rpc_done = 1; |
26e976a8 | 1282 | } |
cdd4e68b TM |
1283 | } |
1284 | ||
1285 | static void nfs4_open_confirm_release(void *calldata) | |
1286 | { | |
1287 | struct nfs4_opendata *data = calldata; | |
1288 | struct nfs4_state *state = NULL; | |
1289 | ||
1290 | /* If this request hasn't been cancelled, do nothing */ | |
1291 | if (data->cancelled == 0) | |
1292 | goto out_free; | |
1293 | /* In case of error, no cleanup! */ | |
3e309914 | 1294 | if (!data->rpc_done) |
cdd4e68b | 1295 | goto out_free; |
cdd4e68b | 1296 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1297 | if (!IS_ERR(state)) |
dc0b027d | 1298 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1299 | out_free: |
c6d00e63 | 1300 | nfs4_opendata_put(data); |
cdd4e68b TM |
1301 | } |
1302 | ||
1303 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1304 | .rpc_call_done = nfs4_open_confirm_done, |
1305 | .rpc_release = nfs4_open_confirm_release, | |
1306 | }; | |
1307 | ||
1308 | /* | |
1309 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1310 | */ | |
1311 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1312 | { | |
1313 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1314 | struct rpc_task *task; | |
5138fde0 TM |
1315 | struct rpc_message msg = { |
1316 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1317 | .rpc_argp = &data->c_arg, | |
1318 | .rpc_resp = &data->c_res, | |
1319 | .rpc_cred = data->owner->so_cred, | |
1320 | }; | |
c970aa85 TM |
1321 | struct rpc_task_setup task_setup_data = { |
1322 | .rpc_client = server->client, | |
5138fde0 | 1323 | .rpc_message = &msg, |
c970aa85 TM |
1324 | .callback_ops = &nfs4_open_confirm_ops, |
1325 | .callback_data = data, | |
101070ca | 1326 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1327 | .flags = RPC_TASK_ASYNC, |
1328 | }; | |
1da177e4 LT |
1329 | int status; |
1330 | ||
c6d00e63 | 1331 | kref_get(&data->kref); |
3e309914 TM |
1332 | data->rpc_done = 0; |
1333 | data->rpc_status = 0; | |
5138fde0 | 1334 | data->timestamp = jiffies; |
c970aa85 | 1335 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1336 | if (IS_ERR(task)) |
cdd4e68b | 1337 | return PTR_ERR(task); |
cdd4e68b TM |
1338 | status = nfs4_wait_for_completion_rpc_task(task); |
1339 | if (status != 0) { | |
1340 | data->cancelled = 1; | |
1341 | smp_wmb(); | |
1342 | } else | |
1343 | status = data->rpc_status; | |
e6b3c4db | 1344 | rpc_put_task(task); |
1da177e4 LT |
1345 | return status; |
1346 | } | |
1347 | ||
24ac23ab | 1348 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1349 | { |
24ac23ab TM |
1350 | struct nfs4_opendata *data = calldata; |
1351 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1352 | |
24ac23ab TM |
1353 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1354 | return; | |
aac00a8d TM |
1355 | /* |
1356 | * Check if we still need to send an OPEN call, or if we can use | |
1357 | * a delegation instead. | |
1358 | */ | |
1359 | if (data->state != NULL) { | |
1360 | struct nfs_delegation *delegation; | |
1361 | ||
dc0b027d | 1362 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1363 | goto out_no_action; |
aac00a8d TM |
1364 | rcu_read_lock(); |
1365 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1366 | if (delegation != NULL && | |
15c831bf | 1367 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1368 | rcu_read_unlock(); |
6ee41268 | 1369 | goto out_no_action; |
aac00a8d TM |
1370 | } |
1371 | rcu_read_unlock(); | |
1372 | } | |
24ac23ab | 1373 | /* Update sequence id. */ |
9f958ab8 | 1374 | data->o_arg.id = sp->so_owner_id.id; |
1f0e890d | 1375 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; |
6f220ed5 | 1376 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1377 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1378 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1379 | } | |
26e976a8 | 1380 | data->timestamp = jiffies; |
035168ab | 1381 | if (nfs4_setup_sequence(data->o_arg.server, |
d898528c AA |
1382 | &data->o_arg.seq_args, |
1383 | &data->o_res.seq_res, 1, task)) | |
1384 | return; | |
5138fde0 | 1385 | rpc_call_start(task); |
6ee41268 TM |
1386 | return; |
1387 | out_no_action: | |
1388 | task->tk_action = NULL; | |
1389 | ||
24ac23ab | 1390 | } |
1da177e4 | 1391 | |
b257957e AB |
1392 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
1393 | { | |
1394 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
1395 | nfs4_open_prepare(task, calldata); | |
1396 | } | |
1397 | ||
24ac23ab TM |
1398 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1399 | { | |
1400 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1401 | |
24ac23ab | 1402 | data->rpc_status = task->tk_status; |
d898528c | 1403 | |
14516c3a TM |
1404 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) |
1405 | return; | |
d898528c | 1406 | |
24ac23ab TM |
1407 | if (task->tk_status == 0) { |
1408 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1409 | case S_IFREG: |
1410 | break; | |
1411 | case S_IFLNK: | |
24ac23ab | 1412 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1413 | break; |
1414 | case S_IFDIR: | |
24ac23ab | 1415 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1416 | break; |
1417 | default: | |
24ac23ab | 1418 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1419 | } |
26e976a8 | 1420 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1421 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1422 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1423 | } |
3e309914 | 1424 | data->rpc_done = 1; |
24ac23ab | 1425 | } |
6f926b5b | 1426 | |
24ac23ab TM |
1427 | static void nfs4_open_release(void *calldata) |
1428 | { | |
1429 | struct nfs4_opendata *data = calldata; | |
1430 | struct nfs4_state *state = NULL; | |
1431 | ||
1432 | /* If this request hasn't been cancelled, do nothing */ | |
1433 | if (data->cancelled == 0) | |
1434 | goto out_free; | |
1435 | /* In case of error, no cleanup! */ | |
3e309914 | 1436 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1437 | goto out_free; |
1438 | /* In case we need an open_confirm, no cleanup! */ | |
1439 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1440 | goto out_free; | |
24ac23ab | 1441 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1442 | if (!IS_ERR(state)) |
dc0b027d | 1443 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1444 | out_free: |
c6d00e63 | 1445 | nfs4_opendata_put(data); |
24ac23ab TM |
1446 | } |
1447 | ||
1448 | static const struct rpc_call_ops nfs4_open_ops = { | |
1449 | .rpc_call_prepare = nfs4_open_prepare, | |
1450 | .rpc_call_done = nfs4_open_done, | |
1451 | .rpc_release = nfs4_open_release, | |
1452 | }; | |
1453 | ||
b257957e AB |
1454 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
1455 | .rpc_call_prepare = nfs4_recover_open_prepare, | |
1456 | .rpc_call_done = nfs4_open_done, | |
1457 | .rpc_release = nfs4_open_release, | |
1458 | }; | |
1459 | ||
1460 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
24ac23ab TM |
1461 | { |
1462 | struct inode *dir = data->dir->d_inode; | |
1463 | struct nfs_server *server = NFS_SERVER(dir); | |
1464 | struct nfs_openargs *o_arg = &data->o_arg; | |
1465 | struct nfs_openres *o_res = &data->o_res; | |
1466 | struct rpc_task *task; | |
5138fde0 TM |
1467 | struct rpc_message msg = { |
1468 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1469 | .rpc_argp = o_arg, | |
1470 | .rpc_resp = o_res, | |
1471 | .rpc_cred = data->owner->so_cred, | |
1472 | }; | |
c970aa85 TM |
1473 | struct rpc_task_setup task_setup_data = { |
1474 | .rpc_client = server->client, | |
5138fde0 | 1475 | .rpc_message = &msg, |
c970aa85 TM |
1476 | .callback_ops = &nfs4_open_ops, |
1477 | .callback_data = data, | |
101070ca | 1478 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1479 | .flags = RPC_TASK_ASYNC, |
1480 | }; | |
24ac23ab TM |
1481 | int status; |
1482 | ||
c6d00e63 | 1483 | kref_get(&data->kref); |
3e309914 TM |
1484 | data->rpc_done = 0; |
1485 | data->rpc_status = 0; | |
2ced46c2 | 1486 | data->cancelled = 0; |
b257957e AB |
1487 | if (isrecover) |
1488 | task_setup_data.callback_ops = &nfs4_recover_open_ops; | |
c970aa85 | 1489 | task = rpc_run_task(&task_setup_data); |
b257957e AB |
1490 | if (IS_ERR(task)) |
1491 | return PTR_ERR(task); | |
1492 | status = nfs4_wait_for_completion_rpc_task(task); | |
1493 | if (status != 0) { | |
1494 | data->cancelled = 1; | |
1495 | smp_wmb(); | |
1496 | } else | |
1497 | status = data->rpc_status; | |
1498 | rpc_put_task(task); | |
1499 | ||
1500 | return status; | |
1501 | } | |
1502 | ||
1503 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1504 | { | |
1505 | struct inode *dir = data->dir->d_inode; | |
1506 | struct nfs_openres *o_res = &data->o_res; | |
1507 | int status; | |
1508 | ||
1509 | status = nfs4_run_open_task(data, 1); | |
1510 | if (status != 0 || !data->rpc_done) | |
1511 | return status; | |
1512 | ||
1513 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1514 | ||
1515 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1516 | status = _nfs4_proc_open_confirm(data); | |
1517 | if (status != 0) | |
1518 | return status; | |
1519 | } | |
1520 | ||
1521 | return status; | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1526 | */ | |
1527 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1528 | { | |
1529 | struct inode *dir = data->dir->d_inode; | |
1530 | struct nfs_server *server = NFS_SERVER(dir); | |
1531 | struct nfs_openargs *o_arg = &data->o_arg; | |
1532 | struct nfs_openres *o_res = &data->o_res; | |
1533 | int status; | |
1534 | ||
1535 | status = nfs4_run_open_task(data, 0); | |
3e309914 | 1536 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1537 | return status; |
1538 | ||
56ae19f3 TM |
1539 | if (o_arg->open_flags & O_CREAT) { |
1540 | update_changeattr(dir, &o_res->cinfo); | |
1541 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1542 | } else | |
1543 | nfs_refresh_inode(dir, o_res->dir_attr); | |
0df5dd4a TM |
1544 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) |
1545 | server->caps &= ~NFS_CAP_POSIX_LOCK; | |
1da177e4 | 1546 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1547 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1548 | if (status != 0) |
24ac23ab | 1549 | return status; |
1da177e4 LT |
1550 | } |
1551 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1552 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1553 | return 0; |
1da177e4 LT |
1554 | } |
1555 | ||
10afec90 | 1556 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1557 | { |
7539bbab | 1558 | struct nfs_client *clp = server->nfs_client; |
a78cb57a | 1559 | unsigned int loop; |
6b30954e | 1560 | int ret; |
58d9714a | 1561 | |
a78cb57a | 1562 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
65de872e | 1563 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e | 1564 | if (ret != 0) |
a78cb57a | 1565 | break; |
e598d843 TM |
1566 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1567 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1568 | break; |
58d9714a | 1569 | nfs4_schedule_state_recovery(clp); |
a78cb57a | 1570 | ret = -EIO; |
6b30954e | 1571 | } |
a78cb57a | 1572 | return ret; |
58d9714a TM |
1573 | } |
1574 | ||
1da177e4 LT |
1575 | /* |
1576 | * OPEN_EXPIRED: | |
1577 | * reclaim state on the server after a network partition. | |
1578 | * Assumes caller holds the appropriate lock | |
1579 | */ | |
539cd03a | 1580 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1581 | { |
e56e0b78 | 1582 | struct nfs4_opendata *opendata; |
864472e9 | 1583 | int ret; |
1da177e4 | 1584 | |
6f220ed5 TM |
1585 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1586 | if (IS_ERR(opendata)) | |
1587 | return PTR_ERR(opendata); | |
864472e9 | 1588 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1589 | if (ret == -ESTALE) |
539cd03a | 1590 | d_drop(ctx->path.dentry); |
c6d00e63 | 1591 | nfs4_opendata_put(opendata); |
864472e9 | 1592 | return ret; |
1da177e4 LT |
1593 | } |
1594 | ||
a9ed2e25 | 1595 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1596 | { |
539cd03a | 1597 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1598 | struct nfs4_exception exception = { }; |
1599 | int err; | |
1600 | ||
1601 | do { | |
539cd03a | 1602 | err = _nfs4_open_expired(ctx, state); |
a9ed2e25 TM |
1603 | switch (err) { |
1604 | default: | |
1605 | goto out; | |
1606 | case -NFS4ERR_GRACE: | |
1607 | case -NFS4ERR_DELAY: | |
2c643488 | 1608 | case -EKEYEXPIRED: |
a9ed2e25 TM |
1609 | nfs4_handle_exception(server, err, &exception); |
1610 | err = 0; | |
1611 | } | |
202b50dc | 1612 | } while (exception.retry); |
a9ed2e25 | 1613 | out: |
202b50dc TM |
1614 | return err; |
1615 | } | |
1616 | ||
1da177e4 LT |
1617 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1618 | { | |
1da177e4 | 1619 | struct nfs_open_context *ctx; |
864472e9 | 1620 | int ret; |
1da177e4 | 1621 | |
864472e9 TM |
1622 | ctx = nfs4_state_find_open_context(state); |
1623 | if (IS_ERR(ctx)) | |
1624 | return PTR_ERR(ctx); | |
539cd03a | 1625 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1626 | put_nfs_open_context(ctx); |
1627 | return ret; | |
1da177e4 LT |
1628 | } |
1629 | ||
aa53ed54 JL |
1630 | /* |
1631 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1632 | * fields corresponding to attributes that were used to store the verifier. | |
1633 | * Make sure we clobber those fields in the later setattr call | |
1634 | */ | |
1635 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1636 | { | |
1637 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1638 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1639 | sattr->ia_valid |= ATTR_ATIME; | |
1640 | ||
1641 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1642 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1643 | sattr->ia_valid |= ATTR_MTIME; | |
1644 | } | |
1645 | ||
1da177e4 | 1646 | /* |
24ac23ab | 1647 | * Returns a referenced nfs4_state |
1da177e4 | 1648 | */ |
dc0b027d | 1649 | 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 |
1650 | { |
1651 | struct nfs4_state_owner *sp; | |
1652 | struct nfs4_state *state = NULL; | |
1653 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1654 | struct nfs4_opendata *opendata; |
aac00a8d | 1655 | int status; |
1da177e4 LT |
1656 | |
1657 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1658 | status = -ENOMEM; |
1659 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1660 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1661 | goto out_err; | |
1662 | } | |
58d9714a TM |
1663 | status = nfs4_recover_expired_lease(server); |
1664 | if (status != 0) | |
b4454fe1 | 1665 | goto err_put_state_owner; |
aac00a8d | 1666 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1667 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1668 | status = -ENOMEM; |
8535b2be | 1669 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL); |
e56e0b78 | 1670 | if (opendata == NULL) |
95d35cb4 | 1671 | goto err_put_state_owner; |
1da177e4 | 1672 | |
aac00a8d TM |
1673 | if (path->dentry->d_inode != NULL) |
1674 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1675 | ||
24ac23ab | 1676 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1677 | if (status != 0) |
c6d00e63 | 1678 | goto err_opendata_put; |
1da177e4 | 1679 | |
24ac23ab | 1680 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1681 | status = PTR_ERR(state); |
1682 | if (IS_ERR(state)) | |
c6d00e63 | 1683 | goto err_opendata_put; |
0df5dd4a | 1684 | if (server->caps & NFS_CAP_POSIX_LOCK) |
8e469ebd | 1685 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); |
0ab64e0e TM |
1686 | |
1687 | if (opendata->o_arg.open_flags & O_EXCL) { | |
1688 | nfs4_exclusive_attrset(opendata, sattr); | |
1689 | ||
1690 | nfs_fattr_init(opendata->o_res.f_attr); | |
1691 | status = nfs4_do_setattr(state->inode, cred, | |
1692 | opendata->o_res.f_attr, sattr, | |
1693 | state); | |
1694 | if (status == 0) | |
1695 | nfs_setattr_update_inode(state->inode, sattr); | |
1696 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); | |
1697 | } | |
c6d00e63 | 1698 | nfs4_opendata_put(opendata); |
1da177e4 | 1699 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1700 | *res = state; |
1701 | return 0; | |
c6d00e63 TM |
1702 | err_opendata_put: |
1703 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1704 | err_put_state_owner: |
1705 | nfs4_put_state_owner(sp); | |
1da177e4 | 1706 | out_err: |
1da177e4 LT |
1707 | *res = NULL; |
1708 | return status; | |
1709 | } | |
1710 | ||
1711 | ||
dc0b027d | 1712 | 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 |
1713 | { |
1714 | struct nfs4_exception exception = { }; | |
1715 | struct nfs4_state *res; | |
1716 | int status; | |
1717 | ||
1718 | do { | |
dc0b027d | 1719 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1720 | if (status == 0) |
1721 | break; | |
1722 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1723 | * book-keeping w.r.t. state-changing operations | |
1724 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1725 | * It is actually a sign of a bug on the client or on the server. | |
1726 | * | |
1727 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1728 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1729 | * have unhashed the old state_owner for us, and that we can |
1730 | * therefore safely retry using a new one. We should still warn | |
1731 | * the user though... | |
1732 | */ | |
1733 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1734 | printk(KERN_WARNING "NFS: v4 server %s " |
1735 | " returned a bad sequence-id error!\n", | |
1736 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1737 | exception.retry = 1; |
1738 | continue; | |
1739 | } | |
550f5747 TM |
1740 | /* |
1741 | * BAD_STATEID on OPEN means that the server cancelled our | |
1742 | * state before it received the OPEN_CONFIRM. | |
1743 | * Recover by retrying the request as per the discussion | |
1744 | * on Page 181 of RFC3530. | |
1745 | */ | |
1746 | if (status == -NFS4ERR_BAD_STATEID) { | |
1747 | exception.retry = 1; | |
1748 | continue; | |
1749 | } | |
aac00a8d TM |
1750 | if (status == -EAGAIN) { |
1751 | /* We must have found a delegation */ | |
1752 | exception.retry = 1; | |
1753 | continue; | |
1754 | } | |
1da177e4 LT |
1755 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1756 | status, &exception)); | |
1757 | } while (exception.retry); | |
1758 | return res; | |
1759 | } | |
1760 | ||
659bfcd6 TM |
1761 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1762 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1763 | struct nfs4_state *state) | |
1da177e4 | 1764 | { |
3e4f6290 | 1765 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1766 | struct nfs_setattrargs arg = { |
3e4f6290 | 1767 | .fh = NFS_FH(inode), |
1da177e4 LT |
1768 | .iap = sattr, |
1769 | .server = server, | |
1770 | .bitmask = server->attr_bitmask, | |
1771 | }; | |
1772 | struct nfs_setattrres res = { | |
1773 | .fattr = fattr, | |
1774 | .server = server, | |
1775 | }; | |
1776 | struct rpc_message msg = { | |
659bfcd6 TM |
1777 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1778 | .rpc_argp = &arg, | |
1779 | .rpc_resp = &res, | |
1780 | .rpc_cred = cred, | |
1da177e4 | 1781 | }; |
26e976a8 | 1782 | unsigned long timestamp = jiffies; |
65e4308d | 1783 | int status; |
1da177e4 | 1784 | |
0e574af1 | 1785 | nfs_fattr_init(fattr); |
1da177e4 | 1786 | |
3e4f6290 TM |
1787 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1788 | /* Use that stateid */ | |
1789 | } else if (state != NULL) { | |
77041ed9 | 1790 | nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid); |
08e9eac4 | 1791 | } else |
1da177e4 LT |
1792 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1793 | ||
cccef3b9 | 1794 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1795 | if (status == 0 && state != NULL) |
1796 | renew_lease(server, timestamp); | |
65e4308d | 1797 | return status; |
1da177e4 LT |
1798 | } |
1799 | ||
659bfcd6 TM |
1800 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1801 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1802 | struct nfs4_state *state) | |
1da177e4 | 1803 | { |
3e4f6290 | 1804 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1805 | struct nfs4_exception exception = { }; |
1806 | int err; | |
1807 | do { | |
1808 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1809 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1810 | &exception); |
1811 | } while (exception.retry); | |
1812 | return err; | |
1813 | } | |
1814 | ||
1815 | struct nfs4_closedata { | |
4a35bd41 | 1816 | struct path path; |
1da177e4 LT |
1817 | struct inode *inode; |
1818 | struct nfs4_state *state; | |
1819 | struct nfs_closeargs arg; | |
1820 | struct nfs_closeres res; | |
516a6af6 | 1821 | struct nfs_fattr fattr; |
26e976a8 | 1822 | unsigned long timestamp; |
1da177e4 LT |
1823 | }; |
1824 | ||
963d8fe5 | 1825 | static void nfs4_free_closedata(void *data) |
9512135d | 1826 | { |
963d8fe5 TM |
1827 | struct nfs4_closedata *calldata = data; |
1828 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1829 | |
1830 | nfs4_put_open_state(calldata->state); | |
1831 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1832 | nfs4_put_state_owner(sp); |
31f31db1 | 1833 | path_put(&calldata->path); |
9512135d TM |
1834 | kfree(calldata); |
1835 | } | |
1836 | ||
88069f77 TM |
1837 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
1838 | fmode_t fmode) | |
1839 | { | |
1840 | spin_lock(&state->owner->so_lock); | |
1841 | if (!(fmode & FMODE_READ)) | |
1842 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1843 | if (!(fmode & FMODE_WRITE)) | |
1844 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1845 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1846 | spin_unlock(&state->owner->so_lock); | |
1847 | } | |
1848 | ||
963d8fe5 | 1849 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1850 | { |
963d8fe5 | 1851 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1852 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1853 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1854 | ||
14516c3a TM |
1855 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
1856 | return; | |
1da177e4 LT |
1857 | /* hmm. we are done with the inode, and in the process of freeing |
1858 | * the state_owner. we keep this around to process errors | |
1859 | */ | |
1da177e4 LT |
1860 | switch (task->tk_status) { |
1861 | case 0: | |
45328c35 | 1862 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1863 | renew_lease(server, calldata->timestamp); |
88069f77 TM |
1864 | nfs4_close_clear_stateid_flags(state, |
1865 | calldata->arg.fmode); | |
1da177e4 LT |
1866 | break; |
1867 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1868 | case -NFS4ERR_OLD_STATEID: |
1869 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1870 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1871 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1872 | break; |
1da177e4 | 1873 | default: |
72211dbe TM |
1874 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
1875 | rpc_restart_call_prepare(task); | |
1da177e4 | 1876 | } |
72211dbe | 1877 | nfs_release_seqid(calldata->arg.seqid); |
516a6af6 | 1878 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1879 | } |
1880 | ||
4ce70ada | 1881 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1882 | { |
4ce70ada | 1883 | struct nfs4_closedata *calldata = data; |
9512135d | 1884 | struct nfs4_state *state = calldata->state; |
88069f77 | 1885 | int call_close = 0; |
9512135d | 1886 | |
963d8fe5 | 1887 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1888 | return; |
003707c7 | 1889 | |
88069f77 TM |
1890 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
1891 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
4cecb76f | 1892 | spin_lock(&state->owner->so_lock); |
003707c7 | 1893 | /* Calculate the change in open mode */ |
e7616923 | 1894 | if (state->n_rdwr == 0) { |
003707c7 | 1895 | if (state->n_rdonly == 0) { |
88069f77 TM |
1896 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
1897 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1898 | calldata->arg.fmode &= ~FMODE_READ; | |
003707c7 TM |
1899 | } |
1900 | if (state->n_wronly == 0) { | |
88069f77 TM |
1901 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
1902 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1903 | calldata->arg.fmode &= ~FMODE_WRITE; | |
003707c7 | 1904 | } |
e7616923 | 1905 | } |
4cecb76f | 1906 | spin_unlock(&state->owner->so_lock); |
88069f77 TM |
1907 | |
1908 | if (!call_close) { | |
963d8fe5 TM |
1909 | /* Note: exit _without_ calling nfs4_close_done */ |
1910 | task->tk_action = NULL; | |
9512135d TM |
1911 | return; |
1912 | } | |
88069f77 TM |
1913 | |
1914 | if (calldata->arg.fmode == 0) | |
1915 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
1916 | ||
516a6af6 | 1917 | nfs_fattr_init(calldata->res.fattr); |
26e976a8 | 1918 | calldata->timestamp = jiffies; |
035168ab | 1919 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), |
19ddab06 AA |
1920 | &calldata->arg.seq_args, &calldata->res.seq_res, |
1921 | 1, task)) | |
1922 | return; | |
5138fde0 | 1923 | rpc_call_start(task); |
1da177e4 LT |
1924 | } |
1925 | ||
963d8fe5 | 1926 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1927 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1928 | .rpc_call_done = nfs4_close_done, |
1929 | .rpc_release = nfs4_free_closedata, | |
1930 | }; | |
1931 | ||
1da177e4 LT |
1932 | /* |
1933 | * It is possible for data to be read/written from a mem-mapped file | |
1934 | * after the sys_close call (which hits the vfs layer as a flush). | |
1935 | * This means that we can't safely call nfsv4 close on a file until | |
1936 | * the inode is cleared. This in turn means that we are not good | |
1937 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1938 | * share state even when we are done with one of the three share | |
1939 | * stateid's in the inode. | |
1940 | * | |
1941 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1942 | */ | |
8535b2be | 1943 | int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait) |
1da177e4 | 1944 | { |
4a35bd41 | 1945 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1946 | struct nfs4_closedata *calldata; |
b39e625b TM |
1947 | struct nfs4_state_owner *sp = state->owner; |
1948 | struct rpc_task *task; | |
5138fde0 TM |
1949 | struct rpc_message msg = { |
1950 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1951 | .rpc_cred = state->owner->so_cred, | |
1952 | }; | |
c970aa85 TM |
1953 | struct rpc_task_setup task_setup_data = { |
1954 | .rpc_client = server->client, | |
5138fde0 | 1955 | .rpc_message = &msg, |
c970aa85 | 1956 | .callback_ops = &nfs4_close_ops, |
101070ca | 1957 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1958 | .flags = RPC_TASK_ASYNC, |
1959 | }; | |
9512135d | 1960 | int status = -ENOMEM; |
1da177e4 | 1961 | |
8535b2be | 1962 | calldata = kzalloc(sizeof(*calldata), gfp_mask); |
1da177e4 | 1963 | if (calldata == NULL) |
9512135d | 1964 | goto out; |
4a35bd41 | 1965 | calldata->inode = state->inode; |
1da177e4 | 1966 | calldata->state = state; |
4a35bd41 | 1967 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1968 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1969 | /* Serialization for the sequence id */ |
8535b2be | 1970 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); |
9512135d TM |
1971 | if (calldata->arg.seqid == NULL) |
1972 | goto out_free_calldata; | |
dc0b027d | 1973 | calldata->arg.fmode = 0; |
a65318bf | 1974 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1975 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1976 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1977 | calldata->res.server = server; |
5f7dbd5c | 1978 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
f6948697 AV |
1979 | path_get(path); |
1980 | calldata->path = *path; | |
9512135d | 1981 | |
5138fde0 TM |
1982 | msg.rpc_argp = &calldata->arg, |
1983 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1984 | task_setup_data.callback_data = calldata; |
1985 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1986 | if (IS_ERR(task)) |
1987 | return PTR_ERR(task); | |
a49c3c77 TM |
1988 | status = 0; |
1989 | if (wait) | |
1990 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1991 | rpc_put_task(task); |
a49c3c77 | 1992 | return status; |
9512135d TM |
1993 | out_free_calldata: |
1994 | kfree(calldata); | |
1995 | out: | |
b39e625b TM |
1996 | nfs4_put_open_state(state); |
1997 | nfs4_put_state_owner(sp); | |
9512135d | 1998 | return status; |
1da177e4 LT |
1999 | } |
2000 | ||
2b484297 | 2001 | static struct inode * |
cd9a1c0e | 2002 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) |
1da177e4 | 2003 | { |
1da177e4 | 2004 | struct nfs4_state *state; |
1da177e4 | 2005 | |
565277f6 | 2006 | /* Protect against concurrent sillydeletes */ |
cd9a1c0e | 2007 | state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred); |
f46e0bd3 TM |
2008 | if (IS_ERR(state)) |
2009 | return ERR_CAST(state); | |
cd9a1c0e | 2010 | ctx->state = state; |
f46e0bd3 | 2011 | return igrab(state->inode); |
1da177e4 LT |
2012 | } |
2013 | ||
1185a552 | 2014 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
7fe5c398 TM |
2015 | { |
2016 | if (ctx->state == NULL) | |
2017 | return; | |
2018 | if (is_sync) | |
2019 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
2020 | else | |
2021 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
2022 | } | |
1da177e4 LT |
2023 | |
2024 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2025 | { | |
43652ad5 BH |
2026 | struct nfs4_server_caps_arg args = { |
2027 | .fhandle = fhandle, | |
2028 | }; | |
1da177e4 LT |
2029 | struct nfs4_server_caps_res res = {}; |
2030 | struct rpc_message msg = { | |
2031 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 2032 | .rpc_argp = &args, |
1da177e4 LT |
2033 | .rpc_resp = &res, |
2034 | }; | |
2035 | int status; | |
2036 | ||
cccef3b9 | 2037 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2038 | if (status == 0) { |
2039 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
62ab460c TM |
2040 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
2041 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2042 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2043 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2044 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
1da177e4 LT |
2045 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
2046 | server->caps |= NFS_CAP_ACLS; | |
2047 | if (res.has_links != 0) | |
2048 | server->caps |= NFS_CAP_HARDLINKS; | |
2049 | if (res.has_symlinks != 0) | |
2050 | server->caps |= NFS_CAP_SYMLINKS; | |
62ab460c TM |
2051 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
2052 | server->caps |= NFS_CAP_FILEID; | |
2053 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2054 | server->caps |= NFS_CAP_MODE; | |
2055 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2056 | server->caps |= NFS_CAP_NLINK; | |
2057 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2058 | server->caps |= NFS_CAP_OWNER; | |
2059 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2060 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2061 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2062 | server->caps |= NFS_CAP_ATIME; | |
2063 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2064 | server->caps |= NFS_CAP_CTIME; | |
2065 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2066 | server->caps |= NFS_CAP_MTIME; | |
2067 | ||
a65318bf TM |
2068 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
2069 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2070 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
2071 | server->acl_bitmask = res.acl_bitmask; |
2072 | } | |
cccef3b9 | 2073 | |
1da177e4 LT |
2074 | return status; |
2075 | } | |
2076 | ||
55a97593 | 2077 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
2078 | { |
2079 | struct nfs4_exception exception = { }; | |
2080 | int err; | |
2081 | do { | |
2082 | err = nfs4_handle_exception(server, | |
2083 | _nfs4_server_capabilities(server, fhandle), | |
2084 | &exception); | |
2085 | } while (exception.retry); | |
2086 | return err; | |
2087 | } | |
2088 | ||
2089 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2090 | struct nfs_fsinfo *info) | |
2091 | { | |
1da177e4 LT |
2092 | struct nfs4_lookup_root_arg args = { |
2093 | .bitmask = nfs4_fattr_bitmap, | |
2094 | }; | |
2095 | struct nfs4_lookup_res res = { | |
2096 | .server = server, | |
0e574af1 | 2097 | .fattr = info->fattr, |
1da177e4 LT |
2098 | .fh = fhandle, |
2099 | }; | |
2100 | struct rpc_message msg = { | |
2101 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2102 | .rpc_argp = &args, | |
2103 | .rpc_resp = &res, | |
2104 | }; | |
008f55d0 | 2105 | |
0e574af1 | 2106 | nfs_fattr_init(info->fattr); |
fccba804 | 2107 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2108 | } |
2109 | ||
2110 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2111 | struct nfs_fsinfo *info) | |
2112 | { | |
2113 | struct nfs4_exception exception = { }; | |
2114 | int err; | |
2115 | do { | |
2116 | err = nfs4_handle_exception(server, | |
2117 | _nfs4_lookup_root(server, fhandle, info), | |
2118 | &exception); | |
2119 | } while (exception.retry); | |
2120 | return err; | |
2121 | } | |
2122 | ||
54ceac45 DH |
2123 | /* |
2124 | * get the file handle for the "/" directory on the server | |
2125 | */ | |
1da177e4 | 2126 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 2127 | struct nfs_fsinfo *info) |
1da177e4 | 2128 | { |
1da177e4 LT |
2129 | int status; |
2130 | ||
1da177e4 | 2131 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2132 | if (status == 0) |
2133 | status = nfs4_server_capabilities(server, fhandle); | |
2134 | if (status == 0) | |
2135 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2136 | return nfs4_map_errors(status); |
1da177e4 LT |
2137 | } |
2138 | ||
6b97fd3d MN |
2139 | /* |
2140 | * Get locations and (maybe) other attributes of a referral. | |
2141 | * Note that we'll actually follow the referral later when | |
2142 | * we detect fsid mismatch in inode revalidation | |
2143 | */ | |
56659e99 | 2144 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2145 | { |
2146 | int status = -ENOMEM; | |
2147 | struct page *page = NULL; | |
2148 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2149 | |
2150 | page = alloc_page(GFP_KERNEL); | |
2151 | if (page == NULL) | |
2152 | goto out; | |
2153 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2154 | if (locations == NULL) | |
2155 | goto out; | |
2156 | ||
c228fd3a | 2157 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2158 | if (status != 0) |
2159 | goto out; | |
2160 | /* Make sure server returned a different fsid for the referral */ | |
2161 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2162 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2163 | status = -EIO; |
2164 | goto out; | |
2165 | } | |
2166 | ||
2167 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2168 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2169 | if (!fattr->mode) | |
2170 | fattr->mode = S_IFDIR; | |
2171 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2172 | out: | |
2173 | if (page) | |
2174 | __free_page(page); | |
5d7ca35a | 2175 | kfree(locations); |
6b97fd3d MN |
2176 | return status; |
2177 | } | |
2178 | ||
1da177e4 LT |
2179 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2180 | { | |
2181 | struct nfs4_getattr_arg args = { | |
2182 | .fh = fhandle, | |
2183 | .bitmask = server->attr_bitmask, | |
2184 | }; | |
2185 | struct nfs4_getattr_res res = { | |
2186 | .fattr = fattr, | |
2187 | .server = server, | |
2188 | }; | |
2189 | struct rpc_message msg = { | |
2190 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2191 | .rpc_argp = &args, | |
2192 | .rpc_resp = &res, | |
2193 | }; | |
2194 | ||
0e574af1 | 2195 | nfs_fattr_init(fattr); |
cccef3b9 | 2196 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2197 | } |
2198 | ||
2199 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2200 | { | |
2201 | struct nfs4_exception exception = { }; | |
2202 | int err; | |
2203 | do { | |
2204 | err = nfs4_handle_exception(server, | |
2205 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2206 | &exception); | |
2207 | } while (exception.retry); | |
2208 | return err; | |
2209 | } | |
2210 | ||
2211 | /* | |
2212 | * The file is not closed if it is opened due to the a request to change | |
2213 | * the size of the file. The open call will not be needed once the | |
2214 | * VFS layer lookup-intents are implemented. | |
2215 | * | |
2216 | * Close is called when the inode is destroyed. | |
2217 | * If we haven't opened the file for O_WRONLY, we | |
2218 | * need to in the size_change case to obtain a stateid. | |
2219 | * | |
2220 | * Got race? | |
2221 | * Because OPEN is always done by name in nfsv4, it is | |
2222 | * possible that we opened a different file by the same | |
2223 | * name. We can recognize this race condition, but we | |
2224 | * can't do anything about it besides returning an error. | |
2225 | * | |
2226 | * This will be fixed with VFS changes (lookup-intent). | |
2227 | */ | |
2228 | static int | |
2229 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2230 | struct iattr *sattr) | |
2231 | { | |
08e9eac4 | 2232 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2233 | struct rpc_cred *cred = NULL; |
d530838b | 2234 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2235 | int status; |
2236 | ||
0e574af1 | 2237 | nfs_fattr_init(fattr); |
1da177e4 | 2238 | |
d530838b | 2239 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2240 | if (sattr->ia_valid & ATTR_FILE) { |
2241 | struct nfs_open_context *ctx; | |
2242 | ||
2243 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2244 | if (ctx) { |
2245 | cred = ctx->cred; | |
2246 | state = ctx->state; | |
2247 | } | |
659bfcd6 | 2248 | } |
08e9eac4 | 2249 | |
659bfcd6 | 2250 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2251 | if (status == 0) |
2252 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2253 | return status; |
2254 | } | |
2255 | ||
56659e99 TM |
2256 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2257 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2258 | struct nfs_fattr *fattr) |
2259 | { | |
2260 | int status; | |
2261 | struct nfs4_lookup_arg args = { | |
2262 | .bitmask = server->attr_bitmask, | |
2263 | .dir_fh = dirfh, | |
2264 | .name = name, | |
2265 | }; | |
2266 | struct nfs4_lookup_res res = { | |
2267 | .server = server, | |
2268 | .fattr = fattr, | |
2269 | .fh = fhandle, | |
2270 | }; | |
2271 | struct rpc_message msg = { | |
2272 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2273 | .rpc_argp = &args, | |
2274 | .rpc_resp = &res, | |
2275 | }; | |
2276 | ||
2277 | nfs_fattr_init(fattr); | |
2278 | ||
2279 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2280 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2281 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2282 | return status; |
2283 | } | |
2284 | ||
2285 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2286 | struct qstr *name, struct nfs_fh *fhandle, | |
2287 | struct nfs_fattr *fattr) | |
2288 | { | |
2289 | struct nfs4_exception exception = { }; | |
2290 | int err; | |
2291 | do { | |
4e56e082 TM |
2292 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2293 | /* FIXME: !!!! */ | |
2294 | if (err == -NFS4ERR_MOVED) { | |
2295 | err = -EREMOTE; | |
2296 | break; | |
2297 | } | |
2298 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2299 | } while (exception.retry); |
2300 | return err; | |
2301 | } | |
2302 | ||
56659e99 | 2303 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2304 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2305 | { | |
4e56e082 | 2306 | int status; |
1da177e4 LT |
2307 | |
2308 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2309 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2310 | if (status == -NFS4ERR_MOVED) |
2311 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2312 | dprintk("NFS reply lookup: %d\n", status); |
2313 | return status; | |
2314 | } | |
2315 | ||
2316 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2317 | { | |
2318 | struct nfs4_exception exception = { }; | |
2319 | int err; | |
2320 | do { | |
2321 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2322 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2323 | &exception); | |
2324 | } while (exception.retry); | |
2325 | return err; | |
2326 | } | |
2327 | ||
2328 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2329 | { | |
76b32999 | 2330 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2331 | struct nfs4_accessargs args = { |
2332 | .fh = NFS_FH(inode), | |
76b32999 TM |
2333 | .bitmask = server->attr_bitmask, |
2334 | }; | |
2335 | struct nfs4_accessres res = { | |
2336 | .server = server, | |
1da177e4 | 2337 | }; |
1da177e4 LT |
2338 | struct rpc_message msg = { |
2339 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2340 | .rpc_argp = &args, | |
2341 | .rpc_resp = &res, | |
2342 | .rpc_cred = entry->cred, | |
2343 | }; | |
2344 | int mode = entry->mask; | |
2345 | int status; | |
2346 | ||
2347 | /* | |
2348 | * Determine which access bits we want to ask for... | |
2349 | */ | |
2350 | if (mode & MAY_READ) | |
2351 | args.access |= NFS4_ACCESS_READ; | |
2352 | if (S_ISDIR(inode->i_mode)) { | |
2353 | if (mode & MAY_WRITE) | |
2354 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2355 | if (mode & MAY_EXEC) | |
2356 | args.access |= NFS4_ACCESS_LOOKUP; | |
2357 | } else { | |
2358 | if (mode & MAY_WRITE) | |
2359 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2360 | if (mode & MAY_EXEC) | |
2361 | args.access |= NFS4_ACCESS_EXECUTE; | |
2362 | } | |
c407d41a TM |
2363 | |
2364 | res.fattr = nfs_alloc_fattr(); | |
2365 | if (res.fattr == NULL) | |
2366 | return -ENOMEM; | |
2367 | ||
cccef3b9 | 2368 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2369 | if (!status) { |
2370 | entry->mask = 0; | |
2371 | if (res.access & NFS4_ACCESS_READ) | |
2372 | entry->mask |= MAY_READ; | |
2373 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2374 | entry->mask |= MAY_WRITE; | |
2375 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2376 | entry->mask |= MAY_EXEC; | |
c407d41a | 2377 | nfs_refresh_inode(inode, res.fattr); |
1da177e4 | 2378 | } |
c407d41a | 2379 | nfs_free_fattr(res.fattr); |
1da177e4 LT |
2380 | return status; |
2381 | } | |
2382 | ||
2383 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2384 | { | |
2385 | struct nfs4_exception exception = { }; | |
2386 | int err; | |
2387 | do { | |
2388 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2389 | _nfs4_proc_access(inode, entry), | |
2390 | &exception); | |
2391 | } while (exception.retry); | |
2392 | return err; | |
2393 | } | |
2394 | ||
2395 | /* | |
2396 | * TODO: For the time being, we don't try to get any attributes | |
2397 | * along with any of the zero-copy operations READ, READDIR, | |
2398 | * READLINK, WRITE. | |
2399 | * | |
2400 | * In the case of the first three, we want to put the GETATTR | |
2401 | * after the read-type operation -- this is because it is hard | |
2402 | * to predict the length of a GETATTR response in v4, and thus | |
2403 | * align the READ data correctly. This means that the GETATTR | |
2404 | * may end up partially falling into the page cache, and we should | |
2405 | * shift it into the 'tail' of the xdr_buf before processing. | |
2406 | * To do this efficiently, we need to know the total length | |
2407 | * of data received, which doesn't seem to be available outside | |
2408 | * of the RPC layer. | |
2409 | * | |
2410 | * In the case of WRITE, we also want to put the GETATTR after | |
2411 | * the operation -- in this case because we want to make sure | |
2412 | * we get the post-operation mtime and size. This means that | |
2413 | * we can't use xdr_encode_pages() as written: we need a variant | |
2414 | * of it which would leave room in the 'tail' iovec. | |
2415 | * | |
2416 | * Both of these changes to the XDR layer would in fact be quite | |
2417 | * minor, but I decided to leave them for a subsequent patch. | |
2418 | */ | |
2419 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2420 | unsigned int pgbase, unsigned int pglen) | |
2421 | { | |
2422 | struct nfs4_readlink args = { | |
2423 | .fh = NFS_FH(inode), | |
2424 | .pgbase = pgbase, | |
2425 | .pglen = pglen, | |
2426 | .pages = &page, | |
2427 | }; | |
f50c7000 | 2428 | struct nfs4_readlink_res res; |
1da177e4 LT |
2429 | struct rpc_message msg = { |
2430 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2431 | .rpc_argp = &args, | |
f50c7000 | 2432 | .rpc_resp = &res, |
1da177e4 LT |
2433 | }; |
2434 | ||
cccef3b9 | 2435 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2436 | } |
2437 | ||
2438 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2439 | unsigned int pgbase, unsigned int pglen) | |
2440 | { | |
2441 | struct nfs4_exception exception = { }; | |
2442 | int err; | |
2443 | do { | |
2444 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2445 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2446 | &exception); | |
2447 | } while (exception.retry); | |
2448 | return err; | |
2449 | } | |
2450 | ||
1da177e4 LT |
2451 | /* |
2452 | * Got race? | |
2453 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2454 | * Until then, this create/open method is prone to inefficiency and race | |
2455 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2456 | * placed on the wire. | |
2457 | * | |
2458 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2459 | * The file will be opened again in the subsequent VFS open call | |
2460 | * (nfs4_proc_file_open). | |
2461 | * | |
2462 | * The open for read will just hang around to be used by any process that | |
2463 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2464 | */ | |
2465 | ||
2466 | static int | |
2467 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
c0204fd2 | 2468 | int flags, struct nfs_open_context *ctx) |
1da177e4 | 2469 | { |
c0204fd2 | 2470 | struct path my_path = { |
ad389da7 TM |
2471 | .dentry = dentry, |
2472 | }; | |
c0204fd2 | 2473 | struct path *path = &my_path; |
1da177e4 | 2474 | struct nfs4_state *state; |
c0204fd2 TM |
2475 | struct rpc_cred *cred = NULL; |
2476 | fmode_t fmode = 0; | |
1da177e4 LT |
2477 | int status = 0; |
2478 | ||
c0204fd2 TM |
2479 | if (ctx != NULL) { |
2480 | cred = ctx->cred; | |
2481 | path = &ctx->path; | |
2482 | fmode = ctx->mode; | |
1da177e4 | 2483 | } |
c0204fd2 | 2484 | state = nfs4_do_open(dir, path, fmode, flags, sattr, cred); |
d4d9cdcb | 2485 | d_drop(dentry); |
1da177e4 LT |
2486 | if (IS_ERR(state)) { |
2487 | status = PTR_ERR(state); | |
c0204fd2 | 2488 | goto out; |
1da177e4 | 2489 | } |
d4d9cdcb | 2490 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2491 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
c0204fd2 TM |
2492 | if (ctx != NULL) |
2493 | ctx->state = state; | |
02a913a7 | 2494 | else |
c0204fd2 | 2495 | nfs4_close_sync(path, state, fmode); |
1da177e4 LT |
2496 | out: |
2497 | return status; | |
2498 | } | |
2499 | ||
2500 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2501 | { | |
16e42959 | 2502 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2503 | struct nfs_removeargs args = { |
1da177e4 | 2504 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2505 | .name.len = name->len, |
2506 | .name.name = name->name, | |
16e42959 TM |
2507 | .bitmask = server->attr_bitmask, |
2508 | }; | |
4fdc17b2 | 2509 | struct nfs_removeres res = { |
16e42959 | 2510 | .server = server, |
1da177e4 | 2511 | }; |
1da177e4 | 2512 | struct rpc_message msg = { |
4fdc17b2 TM |
2513 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2514 | .rpc_argp = &args, | |
2515 | .rpc_resp = &res, | |
1da177e4 | 2516 | }; |
d346890b TM |
2517 | int status = -ENOMEM; |
2518 | ||
2519 | res.dir_attr = nfs_alloc_fattr(); | |
2520 | if (res.dir_attr == NULL) | |
2521 | goto out; | |
1da177e4 | 2522 | |
cccef3b9 | 2523 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2524 | if (status == 0) { |
2525 | update_changeattr(dir, &res.cinfo); | |
d346890b | 2526 | nfs_post_op_update_inode(dir, res.dir_attr); |
16e42959 | 2527 | } |
d346890b TM |
2528 | nfs_free_fattr(res.dir_attr); |
2529 | out: | |
1da177e4 LT |
2530 | return status; |
2531 | } | |
2532 | ||
2533 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2534 | { | |
2535 | struct nfs4_exception exception = { }; | |
2536 | int err; | |
2537 | do { | |
2538 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2539 | _nfs4_proc_remove(dir, name), | |
2540 | &exception); | |
2541 | } while (exception.retry); | |
2542 | return err; | |
2543 | } | |
2544 | ||
e4eff1a6 | 2545 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2546 | { |
e4eff1a6 TM |
2547 | struct nfs_server *server = NFS_SERVER(dir); |
2548 | struct nfs_removeargs *args = msg->rpc_argp; | |
2549 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2550 | |
a65318bf | 2551 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2552 | res->server = server; |
1da177e4 | 2553 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2554 | } |
2555 | ||
e4eff1a6 | 2556 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2557 | { |
e4eff1a6 TM |
2558 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2559 | ||
14516c3a TM |
2560 | if (!nfs4_sequence_done(task, &res->seq_res)) |
2561 | return 0; | |
9e33bed5 | 2562 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2563 | return 0; |
2564 | update_changeattr(dir, &res->cinfo); | |
d346890b | 2565 | nfs_post_op_update_inode(dir, res->dir_attr); |
e4eff1a6 | 2566 | return 1; |
1da177e4 LT |
2567 | } |
2568 | ||
2569 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2570 | struct inode *new_dir, struct qstr *new_name) | |
2571 | { | |
6caf2c82 | 2572 | struct nfs_server *server = NFS_SERVER(old_dir); |
920769f0 | 2573 | struct nfs_renameargs arg = { |
1da177e4 LT |
2574 | .old_dir = NFS_FH(old_dir), |
2575 | .new_dir = NFS_FH(new_dir), | |
2576 | .old_name = old_name, | |
2577 | .new_name = new_name, | |
6caf2c82 TM |
2578 | .bitmask = server->attr_bitmask, |
2579 | }; | |
e8582a8b | 2580 | struct nfs_renameres res = { |
6caf2c82 | 2581 | .server = server, |
1da177e4 | 2582 | }; |
1da177e4 LT |
2583 | struct rpc_message msg = { |
2584 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2585 | .rpc_argp = &arg, | |
2586 | .rpc_resp = &res, | |
2587 | }; | |
011fff72 | 2588 | int status = -ENOMEM; |
1da177e4 | 2589 | |
011fff72 TM |
2590 | res.old_fattr = nfs_alloc_fattr(); |
2591 | res.new_fattr = nfs_alloc_fattr(); | |
2592 | if (res.old_fattr == NULL || res.new_fattr == NULL) | |
2593 | goto out; | |
1da177e4 | 2594 | |
011fff72 | 2595 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2596 | if (!status) { |
2597 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2598 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2599 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2600 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 | 2601 | } |
011fff72 TM |
2602 | out: |
2603 | nfs_free_fattr(res.new_fattr); | |
2604 | nfs_free_fattr(res.old_fattr); | |
1da177e4 LT |
2605 | return status; |
2606 | } | |
2607 | ||
2608 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2609 | struct inode *new_dir, struct qstr *new_name) | |
2610 | { | |
2611 | struct nfs4_exception exception = { }; | |
2612 | int err; | |
2613 | do { | |
2614 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2615 | _nfs4_proc_rename(old_dir, old_name, | |
2616 | new_dir, new_name), | |
2617 | &exception); | |
2618 | } while (exception.retry); | |
2619 | return err; | |
2620 | } | |
2621 | ||
2622 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2623 | { | |
91ba2eee | 2624 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2625 | struct nfs4_link_arg arg = { |
2626 | .fh = NFS_FH(inode), | |
2627 | .dir_fh = NFS_FH(dir), | |
2628 | .name = name, | |
91ba2eee TM |
2629 | .bitmask = server->attr_bitmask, |
2630 | }; | |
91ba2eee TM |
2631 | struct nfs4_link_res res = { |
2632 | .server = server, | |
1da177e4 | 2633 | }; |
1da177e4 LT |
2634 | struct rpc_message msg = { |
2635 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2636 | .rpc_argp = &arg, | |
91ba2eee | 2637 | .rpc_resp = &res, |
1da177e4 | 2638 | }; |
136f2627 TM |
2639 | int status = -ENOMEM; |
2640 | ||
2641 | res.fattr = nfs_alloc_fattr(); | |
2642 | res.dir_attr = nfs_alloc_fattr(); | |
2643 | if (res.fattr == NULL || res.dir_attr == NULL) | |
2644 | goto out; | |
1da177e4 | 2645 | |
cccef3b9 | 2646 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2647 | if (!status) { |
2648 | update_changeattr(dir, &res.cinfo); | |
2649 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2650 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2651 | } |
136f2627 TM |
2652 | out: |
2653 | nfs_free_fattr(res.dir_attr); | |
2654 | nfs_free_fattr(res.fattr); | |
1da177e4 LT |
2655 | return status; |
2656 | } | |
2657 | ||
2658 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2659 | { | |
2660 | struct nfs4_exception exception = { }; | |
2661 | int err; | |
2662 | do { | |
2663 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2664 | _nfs4_proc_link(inode, dir, name), | |
2665 | &exception); | |
2666 | } while (exception.retry); | |
2667 | return err; | |
2668 | } | |
2669 | ||
57dc9a57 TM |
2670 | struct nfs4_createdata { |
2671 | struct rpc_message msg; | |
2672 | struct nfs4_create_arg arg; | |
2673 | struct nfs4_create_res res; | |
2674 | struct nfs_fh fh; | |
2675 | struct nfs_fattr fattr; | |
2676 | struct nfs_fattr dir_fattr; | |
2677 | }; | |
2678 | ||
2679 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2680 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2681 | { | |
2682 | struct nfs4_createdata *data; | |
2683 | ||
2684 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2685 | if (data != NULL) { | |
2686 | struct nfs_server *server = NFS_SERVER(dir); | |
2687 | ||
2688 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2689 | data->msg.rpc_argp = &data->arg; | |
2690 | data->msg.rpc_resp = &data->res; | |
2691 | data->arg.dir_fh = NFS_FH(dir); | |
2692 | data->arg.server = server; | |
2693 | data->arg.name = name; | |
2694 | data->arg.attrs = sattr; | |
2695 | data->arg.ftype = ftype; | |
2696 | data->arg.bitmask = server->attr_bitmask; | |
2697 | data->res.server = server; | |
2698 | data->res.fh = &data->fh; | |
2699 | data->res.fattr = &data->fattr; | |
2700 | data->res.dir_fattr = &data->dir_fattr; | |
2701 | nfs_fattr_init(data->res.fattr); | |
2702 | nfs_fattr_init(data->res.dir_fattr); | |
2703 | } | |
2704 | return data; | |
2705 | } | |
2706 | ||
2707 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2708 | { | |
cccef3b9 AA |
2709 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2710 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2711 | if (status == 0) { |
2712 | update_changeattr(dir, &data->res.dir_cinfo); | |
2713 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2714 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2715 | } | |
2716 | return status; | |
2717 | } | |
2718 | ||
2719 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2720 | { | |
2721 | kfree(data); | |
2722 | } | |
2723 | ||
4f390c15 | 2724 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2725 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2726 | { |
57dc9a57 TM |
2727 | struct nfs4_createdata *data; |
2728 | int status = -ENAMETOOLONG; | |
1da177e4 | 2729 | |
94a6d753 | 2730 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2731 | goto out; |
4f390c15 | 2732 | |
57dc9a57 TM |
2733 | status = -ENOMEM; |
2734 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2735 | if (data == NULL) | |
2736 | goto out; | |
2737 | ||
2738 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2739 | data->arg.u.symlink.pages = &page; | |
2740 | data->arg.u.symlink.len = len; | |
1da177e4 | 2741 | |
57dc9a57 TM |
2742 | status = nfs4_do_create(dir, dentry, data); |
2743 | ||
2744 | nfs4_free_createdata(data); | |
2745 | out: | |
1da177e4 LT |
2746 | return status; |
2747 | } | |
2748 | ||
4f390c15 | 2749 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2750 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2751 | { |
2752 | struct nfs4_exception exception = { }; | |
2753 | int err; | |
2754 | do { | |
2755 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2756 | _nfs4_proc_symlink(dir, dentry, page, |
2757 | len, sattr), | |
1da177e4 LT |
2758 | &exception); |
2759 | } while (exception.retry); | |
2760 | return err; | |
2761 | } | |
2762 | ||
2763 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2764 | struct iattr *sattr) | |
2765 | { | |
57dc9a57 TM |
2766 | struct nfs4_createdata *data; |
2767 | int status = -ENOMEM; | |
1da177e4 | 2768 | |
57dc9a57 TM |
2769 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2770 | if (data == NULL) | |
2771 | goto out; | |
2772 | ||
2773 | status = nfs4_do_create(dir, dentry, data); | |
2774 | ||
2775 | nfs4_free_createdata(data); | |
2776 | out: | |
1da177e4 LT |
2777 | return status; |
2778 | } | |
2779 | ||
2780 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2781 | struct iattr *sattr) | |
2782 | { | |
2783 | struct nfs4_exception exception = { }; | |
2784 | int err; | |
2785 | do { | |
2786 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2787 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2788 | &exception); | |
2789 | } while (exception.retry); | |
2790 | return err; | |
2791 | } | |
2792 | ||
2793 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2794 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2795 | { | |
2796 | struct inode *dir = dentry->d_inode; | |
2797 | struct nfs4_readdir_arg args = { | |
2798 | .fh = NFS_FH(dir), | |
2799 | .pages = &page, | |
2800 | .pgbase = 0, | |
2801 | .count = count, | |
96d25e53 | 2802 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
1da177e4 LT |
2803 | }; |
2804 | struct nfs4_readdir_res res; | |
2805 | struct rpc_message msg = { | |
2806 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2807 | .rpc_argp = &args, | |
2808 | .rpc_resp = &res, | |
2809 | .rpc_cred = cred, | |
2810 | }; | |
2811 | int status; | |
2812 | ||
3110ff80 | 2813 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2814 | dentry->d_parent->d_name.name, |
2815 | dentry->d_name.name, | |
2816 | (unsigned long long)cookie); | |
1da177e4 LT |
2817 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2818 | res.pgbase = args.pgbase; | |
cccef3b9 | 2819 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2820 | if (status == 0) |
2821 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2822 | |
2823 | nfs_invalidate_atime(dir); | |
2824 | ||
3110ff80 | 2825 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2826 | return status; |
2827 | } | |
2828 | ||
2829 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2830 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2831 | { | |
2832 | struct nfs4_exception exception = { }; | |
2833 | int err; | |
2834 | do { | |
2835 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2836 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2837 | page, count, plus), | |
2838 | &exception); | |
2839 | } while (exception.retry); | |
2840 | return err; | |
2841 | } | |
2842 | ||
2843 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2844 | struct iattr *sattr, dev_t rdev) | |
2845 | { | |
57dc9a57 TM |
2846 | struct nfs4_createdata *data; |
2847 | int mode = sattr->ia_mode; | |
2848 | int status = -ENOMEM; | |
1da177e4 LT |
2849 | |
2850 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2851 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2852 | |
2853 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2854 | if (data == NULL) | |
2855 | goto out; | |
2856 | ||
1da177e4 | 2857 | if (S_ISFIFO(mode)) |
57dc9a57 | 2858 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2859 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2860 | data->arg.ftype = NF4BLK; |
2861 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2862 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2863 | } |
2864 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2865 | data->arg.ftype = NF4CHR; |
2866 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2867 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2868 | } |
1da177e4 | 2869 | |
57dc9a57 TM |
2870 | status = nfs4_do_create(dir, dentry, data); |
2871 | ||
2872 | nfs4_free_createdata(data); | |
2873 | out: | |
1da177e4 LT |
2874 | return status; |
2875 | } | |
2876 | ||
2877 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2878 | struct iattr *sattr, dev_t rdev) | |
2879 | { | |
2880 | struct nfs4_exception exception = { }; | |
2881 | int err; | |
2882 | do { | |
2883 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2884 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2885 | &exception); | |
2886 | } while (exception.retry); | |
2887 | return err; | |
2888 | } | |
2889 | ||
2890 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2891 | struct nfs_fsstat *fsstat) | |
2892 | { | |
2893 | struct nfs4_statfs_arg args = { | |
2894 | .fh = fhandle, | |
2895 | .bitmask = server->attr_bitmask, | |
2896 | }; | |
24ad148a BH |
2897 | struct nfs4_statfs_res res = { |
2898 | .fsstat = fsstat, | |
2899 | }; | |
1da177e4 LT |
2900 | struct rpc_message msg = { |
2901 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2902 | .rpc_argp = &args, | |
24ad148a | 2903 | .rpc_resp = &res, |
1da177e4 LT |
2904 | }; |
2905 | ||
0e574af1 | 2906 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2907 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2908 | } |
2909 | ||
2910 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2911 | { | |
2912 | struct nfs4_exception exception = { }; | |
2913 | int err; | |
2914 | do { | |
2915 | err = nfs4_handle_exception(server, | |
2916 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2917 | &exception); | |
2918 | } while (exception.retry); | |
2919 | return err; | |
2920 | } | |
2921 | ||
2922 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2923 | struct nfs_fsinfo *fsinfo) | |
2924 | { | |
2925 | struct nfs4_fsinfo_arg args = { | |
2926 | .fh = fhandle, | |
2927 | .bitmask = server->attr_bitmask, | |
2928 | }; | |
3dda5e43 BH |
2929 | struct nfs4_fsinfo_res res = { |
2930 | .fsinfo = fsinfo, | |
2931 | }; | |
1da177e4 LT |
2932 | struct rpc_message msg = { |
2933 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2934 | .rpc_argp = &args, | |
3dda5e43 | 2935 | .rpc_resp = &res, |
1da177e4 LT |
2936 | }; |
2937 | ||
cccef3b9 | 2938 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2939 | } |
2940 | ||
2941 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2942 | { | |
2943 | struct nfs4_exception exception = { }; | |
2944 | int err; | |
2945 | ||
2946 | do { | |
2947 | err = nfs4_handle_exception(server, | |
2948 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2949 | &exception); | |
2950 | } while (exception.retry); | |
2951 | return err; | |
2952 | } | |
2953 | ||
2954 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2955 | { | |
0e574af1 | 2956 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2957 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2958 | } | |
2959 | ||
2960 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2961 | struct nfs_pathconf *pathconf) | |
2962 | { | |
2963 | struct nfs4_pathconf_arg args = { | |
2964 | .fh = fhandle, | |
2965 | .bitmask = server->attr_bitmask, | |
2966 | }; | |
d45b2989 BH |
2967 | struct nfs4_pathconf_res res = { |
2968 | .pathconf = pathconf, | |
2969 | }; | |
1da177e4 LT |
2970 | struct rpc_message msg = { |
2971 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2972 | .rpc_argp = &args, | |
d45b2989 | 2973 | .rpc_resp = &res, |
1da177e4 LT |
2974 | }; |
2975 | ||
2976 | /* None of the pathconf attributes are mandatory to implement */ | |
2977 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2978 | memset(pathconf, 0, sizeof(*pathconf)); | |
2979 | return 0; | |
2980 | } | |
2981 | ||
0e574af1 | 2982 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2983 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2984 | } |
2985 | ||
2986 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2987 | struct nfs_pathconf *pathconf) | |
2988 | { | |
2989 | struct nfs4_exception exception = { }; | |
2990 | int err; | |
2991 | ||
2992 | do { | |
2993 | err = nfs4_handle_exception(server, | |
2994 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2995 | &exception); | |
2996 | } while (exception.retry); | |
2997 | return err; | |
2998 | } | |
2999 | ||
ec06c096 | 3000 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 3001 | { |
ec06c096 | 3002 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3003 | |
f11c88af AA |
3004 | dprintk("--> %s\n", __func__); |
3005 | ||
14516c3a TM |
3006 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3007 | return -EAGAIN; | |
f11c88af | 3008 | |
9e33bed5 | 3009 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
0110ee15 | 3010 | nfs_restart_rpc(task, server->nfs_client); |
ec06c096 | 3011 | return -EAGAIN; |
1da177e4 | 3012 | } |
8850df99 TM |
3013 | |
3014 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 3015 | if (task->tk_status > 0) |
ec06c096 TM |
3016 | renew_lease(server, data->timestamp); |
3017 | return 0; | |
1da177e4 LT |
3018 | } |
3019 | ||
bdc7f021 | 3020 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 3021 | { |
1da177e4 | 3022 | data->timestamp = jiffies; |
bdc7f021 | 3023 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
3024 | } |
3025 | ||
788e7a89 | 3026 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3027 | { |
1da177e4 LT |
3028 | struct inode *inode = data->inode; |
3029 | ||
14516c3a TM |
3030 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3031 | return -EAGAIN; | |
def6ed7e | 3032 | |
9e33bed5 | 3033 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
0110ee15 | 3034 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3035 | return -EAGAIN; |
1da177e4 | 3036 | } |
4f9838c7 | 3037 | if (task->tk_status >= 0) { |
1da177e4 | 3038 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 3039 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 3040 | } |
788e7a89 | 3041 | return 0; |
1da177e4 LT |
3042 | } |
3043 | ||
bdc7f021 | 3044 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3045 | { |
bdc7f021 TM |
3046 | struct nfs_server *server = NFS_SERVER(data->inode); |
3047 | ||
a65318bf | 3048 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3049 | data->res.server = server; |
1da177e4 LT |
3050 | data->timestamp = jiffies; |
3051 | ||
bdc7f021 | 3052 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
3053 | } |
3054 | ||
788e7a89 | 3055 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3056 | { |
1da177e4 LT |
3057 | struct inode *inode = data->inode; |
3058 | ||
14516c3a TM |
3059 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3060 | return -EAGAIN; | |
3061 | ||
9e33bed5 | 3062 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
0110ee15 | 3063 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3064 | return -EAGAIN; |
1da177e4 | 3065 | } |
9e08a3c5 | 3066 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 3067 | return 0; |
1da177e4 LT |
3068 | } |
3069 | ||
bdc7f021 | 3070 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3071 | { |
788e7a89 | 3072 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3073 | |
a65318bf | 3074 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3075 | data->res.server = server; |
bdc7f021 | 3076 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
3077 | } |
3078 | ||
9bc4e3ca CL |
3079 | struct nfs4_renewdata { |
3080 | struct nfs_client *client; | |
3081 | unsigned long timestamp; | |
3082 | }; | |
3083 | ||
1da177e4 LT |
3084 | /* |
3085 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3086 | * standalone procedure for queueing an asynchronous RENEW. | |
3087 | */ | |
9bc4e3ca | 3088 | static void nfs4_renew_release(void *calldata) |
dc96aef9 | 3089 | { |
9bc4e3ca CL |
3090 | struct nfs4_renewdata *data = calldata; |
3091 | struct nfs_client *clp = data->client; | |
dc96aef9 | 3092 | |
0851de06 AB |
3093 | if (atomic_read(&clp->cl_count) > 1) |
3094 | nfs4_schedule_state_renewal(clp); | |
3095 | nfs_put_client(clp); | |
9bc4e3ca | 3096 | kfree(data); |
dc96aef9 AB |
3097 | } |
3098 | ||
9bc4e3ca | 3099 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) |
1da177e4 | 3100 | { |
9bc4e3ca CL |
3101 | struct nfs4_renewdata *data = calldata; |
3102 | struct nfs_client *clp = data->client; | |
3103 | unsigned long timestamp = data->timestamp; | |
1da177e4 LT |
3104 | |
3105 | if (task->tk_status < 0) { | |
95baa25c TM |
3106 | /* Unless we're shutting down, schedule state recovery! */ |
3107 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
3108 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
3109 | return; |
3110 | } | |
452e9352 | 3111 | do_renew_lease(clp, timestamp); |
1da177e4 LT |
3112 | } |
3113 | ||
963d8fe5 TM |
3114 | static const struct rpc_call_ops nfs4_renew_ops = { |
3115 | .rpc_call_done = nfs4_renew_done, | |
dc96aef9 | 3116 | .rpc_release = nfs4_renew_release, |
963d8fe5 TM |
3117 | }; |
3118 | ||
adfa6f98 | 3119 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3120 | { |
3121 | struct rpc_message msg = { | |
3122 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3123 | .rpc_argp = clp, | |
b4454fe1 | 3124 | .rpc_cred = cred, |
1da177e4 | 3125 | }; |
9bc4e3ca | 3126 | struct nfs4_renewdata *data; |
1da177e4 | 3127 | |
0851de06 AB |
3128 | if (!atomic_inc_not_zero(&clp->cl_count)) |
3129 | return -EIO; | |
9bc4e3ca CL |
3130 | data = kmalloc(sizeof(*data), GFP_KERNEL); |
3131 | if (data == NULL) | |
3132 | return -ENOMEM; | |
3133 | data->client = clp; | |
3134 | data->timestamp = jiffies; | |
1da177e4 | 3135 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
9bc4e3ca | 3136 | &nfs4_renew_ops, data); |
1da177e4 LT |
3137 | } |
3138 | ||
adfa6f98 | 3139 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3140 | { |
3141 | struct rpc_message msg = { | |
3142 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3143 | .rpc_argp = clp, | |
b4454fe1 | 3144 | .rpc_cred = cred, |
1da177e4 LT |
3145 | }; |
3146 | unsigned long now = jiffies; | |
3147 | int status; | |
3148 | ||
3149 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3150 | if (status < 0) | |
3151 | return status; | |
452e9352 | 3152 | do_renew_lease(clp, now); |
1da177e4 LT |
3153 | return 0; |
3154 | } | |
3155 | ||
aa1870af BF |
3156 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3157 | { | |
3158 | return (server->caps & NFS_CAP_ACLS) | |
3159 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3160 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3161 | } | |
3162 | ||
3163 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3164 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3165 | * the stack. | |
3166 | */ | |
3167 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3168 | ||
3169 | static void buf_to_pages(const void *buf, size_t buflen, | |
3170 | struct page **pages, unsigned int *pgbase) | |
3171 | { | |
3172 | const void *p = buf; | |
3173 | ||
3174 | *pgbase = offset_in_page(buf); | |
3175 | p -= *pgbase; | |
3176 | while (p < buf + buflen) { | |
3177 | *(pages++) = virt_to_page(p); | |
3178 | p += PAGE_CACHE_SIZE; | |
3179 | } | |
3180 | } | |
3181 | ||
e50a1c2e BF |
3182 | struct nfs4_cached_acl { |
3183 | int cached; | |
3184 | size_t len; | |
3e9d4154 | 3185 | char data[0]; |
e50a1c2e BF |
3186 | }; |
3187 | ||
3188 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3189 | { | |
3190 | struct nfs_inode *nfsi = NFS_I(inode); | |
3191 | ||
3192 | spin_lock(&inode->i_lock); | |
3193 | kfree(nfsi->nfs4_acl); | |
3194 | nfsi->nfs4_acl = acl; | |
3195 | spin_unlock(&inode->i_lock); | |
3196 | } | |
3197 | ||
3198 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3199 | { | |
3200 | nfs4_set_cached_acl(inode, NULL); | |
3201 | } | |
3202 | ||
3203 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3204 | { | |
3205 | struct nfs_inode *nfsi = NFS_I(inode); | |
3206 | struct nfs4_cached_acl *acl; | |
3207 | int ret = -ENOENT; | |
3208 | ||
3209 | spin_lock(&inode->i_lock); | |
3210 | acl = nfsi->nfs4_acl; | |
3211 | if (acl == NULL) | |
3212 | goto out; | |
3213 | if (buf == NULL) /* user is just asking for length */ | |
3214 | goto out_len; | |
3215 | if (acl->cached == 0) | |
3216 | goto out; | |
3217 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3218 | if (acl->len > buflen) | |
3219 | goto out; | |
3220 | memcpy(buf, acl->data, acl->len); | |
3221 | out_len: | |
3222 | ret = acl->len; | |
3223 | out: | |
3224 | spin_unlock(&inode->i_lock); | |
3225 | return ret; | |
3226 | } | |
3227 | ||
3228 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3229 | { | |
3230 | struct nfs4_cached_acl *acl; | |
3231 | ||
3232 | if (buf && acl_len <= PAGE_SIZE) { | |
3233 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3234 | if (acl == NULL) | |
3235 | goto out; | |
3236 | acl->cached = 1; | |
3237 | memcpy(acl->data, buf, acl_len); | |
3238 | } else { | |
3239 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3240 | if (acl == NULL) | |
3241 | goto out; | |
3242 | acl->cached = 0; | |
3243 | } | |
3244 | acl->len = acl_len; | |
3245 | out: | |
3246 | nfs4_set_cached_acl(inode, acl); | |
3247 | } | |
3248 | ||
16b4289c | 3249 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3250 | { |
aa1870af BF |
3251 | struct page *pages[NFS4ACL_MAXPAGES]; |
3252 | struct nfs_getaclargs args = { | |
3253 | .fh = NFS_FH(inode), | |
3254 | .acl_pages = pages, | |
3255 | .acl_len = buflen, | |
3256 | }; | |
663c79b3 BH |
3257 | struct nfs_getaclres res = { |
3258 | .acl_len = buflen, | |
3259 | }; | |
e50a1c2e | 3260 | void *resp_buf; |
aa1870af BF |
3261 | struct rpc_message msg = { |
3262 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3263 | .rpc_argp = &args, | |
663c79b3 | 3264 | .rpc_resp = &res, |
aa1870af | 3265 | }; |
e50a1c2e | 3266 | struct page *localpage = NULL; |
aa1870af BF |
3267 | int ret; |
3268 | ||
e50a1c2e BF |
3269 | if (buflen < PAGE_SIZE) { |
3270 | /* As long as we're doing a round trip to the server anyway, | |
3271 | * let's be prepared for a page of acl data. */ | |
3272 | localpage = alloc_page(GFP_KERNEL); | |
3273 | resp_buf = page_address(localpage); | |
3274 | if (localpage == NULL) | |
3275 | return -ENOMEM; | |
3276 | args.acl_pages[0] = localpage; | |
3277 | args.acl_pgbase = 0; | |
663c79b3 | 3278 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3279 | } else { |
3280 | resp_buf = buf; | |
3281 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3282 | } | |
cccef3b9 | 3283 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3284 | if (ret) |
3285 | goto out_free; | |
663c79b3 BH |
3286 | if (res.acl_len > args.acl_len) |
3287 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3288 | else |
663c79b3 | 3289 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3290 | if (buf) { |
3291 | ret = -ERANGE; | |
663c79b3 | 3292 | if (res.acl_len > buflen) |
e50a1c2e BF |
3293 | goto out_free; |
3294 | if (localpage) | |
663c79b3 | 3295 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3296 | } |
663c79b3 | 3297 | ret = res.acl_len; |
e50a1c2e BF |
3298 | out_free: |
3299 | if (localpage) | |
3300 | __free_page(localpage); | |
aa1870af BF |
3301 | return ret; |
3302 | } | |
3303 | ||
16b4289c TM |
3304 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3305 | { | |
3306 | struct nfs4_exception exception = { }; | |
3307 | ssize_t ret; | |
3308 | do { | |
3309 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3310 | if (ret >= 0) | |
3311 | break; | |
3312 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3313 | } while (exception.retry); | |
3314 | return ret; | |
3315 | } | |
3316 | ||
e50a1c2e BF |
3317 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3318 | { | |
3319 | struct nfs_server *server = NFS_SERVER(inode); | |
3320 | int ret; | |
3321 | ||
3322 | if (!nfs4_server_supports_acls(server)) | |
3323 | return -EOPNOTSUPP; | |
3324 | ret = nfs_revalidate_inode(server, inode); | |
3325 | if (ret < 0) | |
3326 | return ret; | |
3327 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3328 | if (ret != -ENOENT) | |
3329 | return ret; | |
3330 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3331 | } | |
3332 | ||
16b4289c | 3333 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3334 | { |
3335 | struct nfs_server *server = NFS_SERVER(inode); | |
3336 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3337 | struct nfs_setaclargs arg = { | |
3338 | .fh = NFS_FH(inode), | |
3339 | .acl_pages = pages, | |
3340 | .acl_len = buflen, | |
3341 | }; | |
73c403a9 | 3342 | struct nfs_setaclres res; |
4b580ee3 BF |
3343 | struct rpc_message msg = { |
3344 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3345 | .rpc_argp = &arg, | |
73c403a9 | 3346 | .rpc_resp = &res, |
4b580ee3 BF |
3347 | }; |
3348 | int ret; | |
3349 | ||
3350 | if (!nfs4_server_supports_acls(server)) | |
3351 | return -EOPNOTSUPP; | |
642ac549 | 3352 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3353 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3354 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3355 | nfs_access_zap_cache(inode); |
3356 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3357 | return ret; |
3358 | } | |
3359 | ||
16b4289c TM |
3360 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3361 | { | |
3362 | struct nfs4_exception exception = { }; | |
3363 | int err; | |
3364 | do { | |
3365 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3366 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3367 | &exception); | |
3368 | } while (exception.retry); | |
3369 | return err; | |
3370 | } | |
3371 | ||
1da177e4 | 3372 | static int |
aa5190d0 | 3373 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 3374 | { |
aa5190d0 TM |
3375 | struct nfs_client *clp = server->nfs_client; |
3376 | ||
3377 | if (task->tk_status >= 0) | |
1da177e4 LT |
3378 | return 0; |
3379 | switch(task->tk_status) { | |
9e33bed5 TM |
3380 | case -NFS4ERR_ADMIN_REVOKED: |
3381 | case -NFS4ERR_BAD_STATEID: | |
3382 | case -NFS4ERR_OPENMODE: | |
3383 | if (state == NULL) | |
3384 | break; | |
3385 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 3386 | goto do_state_recovery; |
1da177e4 | 3387 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
3388 | if (state == NULL) |
3389 | break; | |
3390 | nfs4_state_mark_reclaim_reboot(clp, state); | |
3391 | case -NFS4ERR_STALE_CLIENTID: | |
1da177e4 | 3392 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 3393 | goto do_state_recovery; |
4745e315 AA |
3394 | #if defined(CONFIG_NFS_V4_1) |
3395 | case -NFS4ERR_BADSESSION: | |
3396 | case -NFS4ERR_BADSLOT: | |
3397 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3398 | case -NFS4ERR_DEADSESSION: | |
3399 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3400 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3401 | case -NFS4ERR_SEQ_MISORDERED: | |
3402 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3403 | task->tk_status); | |
0b9e2d41 | 3404 | nfs4_schedule_state_recovery(clp); |
4745e315 AA |
3405 | task->tk_status = 0; |
3406 | return -EAGAIN; | |
3407 | #endif /* CONFIG_NFS_V4_1 */ | |
1da177e4 | 3408 | case -NFS4ERR_DELAY: |
aa5190d0 | 3409 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 3410 | case -NFS4ERR_GRACE: |
2c643488 | 3411 | case -EKEYEXPIRED: |
1da177e4 LT |
3412 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3413 | task->tk_status = 0; | |
3414 | return -EAGAIN; | |
3415 | case -NFS4ERR_OLD_STATEID: | |
3416 | task->tk_status = 0; | |
3417 | return -EAGAIN; | |
3418 | } | |
3419 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3420 | return 0; | |
a2c0b9e2 TM |
3421 | do_state_recovery: |
3422 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3423 | nfs4_schedule_state_recovery(clp); | |
3424 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3425 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3426 | task->tk_status = 0; | |
3427 | return -EAGAIN; | |
1da177e4 LT |
3428 | } |
3429 | ||
bb8b27e5 TM |
3430 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, |
3431 | unsigned short port, struct rpc_cred *cred, | |
3432 | struct nfs4_setclientid_res *res) | |
1da177e4 LT |
3433 | { |
3434 | nfs4_verifier sc_verifier; | |
3435 | struct nfs4_setclientid setclientid = { | |
3436 | .sc_verifier = &sc_verifier, | |
3437 | .sc_prog = program, | |
3438 | }; | |
3439 | struct rpc_message msg = { | |
3440 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3441 | .rpc_argp = &setclientid, | |
bb8b27e5 | 3442 | .rpc_resp = res, |
286d7d6a | 3443 | .rpc_cred = cred, |
1da177e4 | 3444 | }; |
bc4785cd | 3445 | __be32 *p; |
1da177e4 LT |
3446 | int loop = 0; |
3447 | int status; | |
3448 | ||
bc4785cd | 3449 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3450 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3451 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3452 | ||
3453 | for(;;) { | |
3454 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3455 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3456 | clp->cl_ipaddr, |
3457 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3458 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3459 | rpc_peeraddr2str(clp->cl_rpcclient, |
3460 | RPC_DISPLAY_PROTO), | |
78ea323b | 3461 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3462 | clp->cl_id_uniquifier); |
3463 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3464 | sizeof(setclientid.sc_netid), |
3465 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3466 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3467 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3468 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3469 | clp->cl_ipaddr, port >> 8, port & 255); |
3470 | ||
3471 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3472 | if (status != -NFS4ERR_CLID_INUSE) | |
3473 | break; | |
3474 | if (signalled()) | |
3475 | break; | |
3476 | if (loop++ & 1) | |
3477 | ssleep(clp->cl_lease_time + 1); | |
3478 | else | |
3479 | if (++clp->cl_id_uniquifier == 0) | |
3480 | break; | |
3481 | } | |
3482 | return status; | |
3483 | } | |
3484 | ||
bb8b27e5 TM |
3485 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3486 | struct nfs4_setclientid_res *arg, | |
3487 | struct rpc_cred *cred) | |
1da177e4 LT |
3488 | { |
3489 | struct nfs_fsinfo fsinfo; | |
3490 | struct rpc_message msg = { | |
3491 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
bb8b27e5 | 3492 | .rpc_argp = arg, |
1da177e4 | 3493 | .rpc_resp = &fsinfo, |
286d7d6a | 3494 | .rpc_cred = cred, |
1da177e4 LT |
3495 | }; |
3496 | unsigned long now; | |
3497 | int status; | |
3498 | ||
3499 | now = jiffies; | |
3500 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3501 | if (status == 0) { | |
3502 | spin_lock(&clp->cl_lock); | |
3503 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3504 | clp->cl_last_renewal = now; | |
3505 | spin_unlock(&clp->cl_lock); | |
3506 | } | |
3507 | return status; | |
3508 | } | |
3509 | ||
bb8b27e5 TM |
3510 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, |
3511 | struct nfs4_setclientid_res *arg, | |
3512 | struct rpc_cred *cred) | |
51581f3b | 3513 | { |
77e03677 | 3514 | long timeout = 0; |
51581f3b TM |
3515 | int err; |
3516 | do { | |
bb8b27e5 | 3517 | err = _nfs4_proc_setclientid_confirm(clp, arg, cred); |
51581f3b TM |
3518 | switch (err) { |
3519 | case 0: | |
3520 | return err; | |
3521 | case -NFS4ERR_RESOURCE: | |
3522 | /* The IBM lawyers misread another document! */ | |
3523 | case -NFS4ERR_DELAY: | |
2c643488 | 3524 | case -EKEYEXPIRED: |
51581f3b TM |
3525 | err = nfs4_delay(clp->cl_rpcclient, &timeout); |
3526 | } | |
3527 | } while (err == 0); | |
3528 | return err; | |
3529 | } | |
3530 | ||
fe650407 TM |
3531 | struct nfs4_delegreturndata { |
3532 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3533 | struct nfs4_delegreturnres res; |
fe650407 TM |
3534 | struct nfs_fh fh; |
3535 | nfs4_stateid stateid; | |
26e976a8 | 3536 | unsigned long timestamp; |
fa178f29 | 3537 | struct nfs_fattr fattr; |
fe650407 TM |
3538 | int rpc_status; |
3539 | }; | |
3540 | ||
fe650407 TM |
3541 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3542 | { | |
3543 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 | 3544 | |
14516c3a TM |
3545 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
3546 | return; | |
938e1010 | 3547 | |
79708861 RL |
3548 | switch (task->tk_status) { |
3549 | case -NFS4ERR_STALE_STATEID: | |
3550 | case -NFS4ERR_EXPIRED: | |
3551 | case 0: | |
fa178f29 | 3552 | renew_lease(data->res.server, data->timestamp); |
79708861 RL |
3553 | break; |
3554 | default: | |
3555 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
3556 | -EAGAIN) { | |
3557 | nfs_restart_rpc(task, data->res.server->nfs_client); | |
3558 | return; | |
3559 | } | |
3560 | } | |
3561 | data->rpc_status = task->tk_status; | |
fe650407 TM |
3562 | } |
3563 | ||
3564 | static void nfs4_delegreturn_release(void *calldata) | |
3565 | { | |
fe650407 TM |
3566 | kfree(calldata); |
3567 | } | |
3568 | ||
938e1010 AA |
3569 | #if defined(CONFIG_NFS_V4_1) |
3570 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3571 | { | |
3572 | struct nfs4_delegreturndata *d_data; | |
3573 | ||
3574 | d_data = (struct nfs4_delegreturndata *)data; | |
3575 | ||
035168ab | 3576 | if (nfs4_setup_sequence(d_data->res.server, |
938e1010 AA |
3577 | &d_data->args.seq_args, |
3578 | &d_data->res.seq_res, 1, task)) | |
3579 | return; | |
3580 | rpc_call_start(task); | |
3581 | } | |
3582 | #endif /* CONFIG_NFS_V4_1 */ | |
3583 | ||
c8d149f3 | 3584 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3585 | #if defined(CONFIG_NFS_V4_1) |
3586 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3587 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3588 | .rpc_call_done = nfs4_delegreturn_done, |
3589 | .rpc_release = nfs4_delegreturn_release, | |
3590 | }; | |
3591 | ||
e6f81075 | 3592 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3593 | { |
3594 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3595 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3596 | struct rpc_task *task; |
5138fde0 TM |
3597 | struct rpc_message msg = { |
3598 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3599 | .rpc_cred = cred, | |
3600 | }; | |
c970aa85 TM |
3601 | struct rpc_task_setup task_setup_data = { |
3602 | .rpc_client = server->client, | |
5138fde0 | 3603 | .rpc_message = &msg, |
c970aa85 TM |
3604 | .callback_ops = &nfs4_delegreturn_ops, |
3605 | .flags = RPC_TASK_ASYNC, | |
3606 | }; | |
e6f81075 | 3607 | int status = 0; |
fe650407 | 3608 | |
8535b2be | 3609 | data = kzalloc(sizeof(*data), GFP_NOFS); |
fe650407 TM |
3610 | if (data == NULL) |
3611 | return -ENOMEM; | |
3612 | data->args.fhandle = &data->fh; | |
3613 | data->args.stateid = &data->stateid; | |
fa178f29 | 3614 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3615 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3616 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3617 | data->res.fattr = &data->fattr; |
3618 | data->res.server = server; | |
5f7dbd5c | 3619 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3620 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3621 | data->timestamp = jiffies; |
fe650407 TM |
3622 | data->rpc_status = 0; |
3623 | ||
c970aa85 | 3624 | task_setup_data.callback_data = data; |
5138fde0 TM |
3625 | msg.rpc_argp = &data->args, |
3626 | msg.rpc_resp = &data->res, | |
c970aa85 | 3627 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3628 | if (IS_ERR(task)) |
fe650407 | 3629 | return PTR_ERR(task); |
e6f81075 TM |
3630 | if (!issync) |
3631 | goto out; | |
fe650407 | 3632 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3633 | if (status != 0) |
3634 | goto out; | |
3635 | status = data->rpc_status; | |
3636 | if (status != 0) | |
3637 | goto out; | |
3638 | nfs_refresh_inode(inode, &data->fattr); | |
3639 | out: | |
e6b3c4db | 3640 | rpc_put_task(task); |
fe650407 | 3641 | return status; |
1da177e4 LT |
3642 | } |
3643 | ||
e6f81075 | 3644 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3645 | { |
3646 | struct nfs_server *server = NFS_SERVER(inode); | |
3647 | struct nfs4_exception exception = { }; | |
3648 | int err; | |
3649 | do { | |
e6f81075 | 3650 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3651 | switch (err) { |
3652 | case -NFS4ERR_STALE_STATEID: | |
3653 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3654 | case 0: |
3655 | return 0; | |
3656 | } | |
3657 | err = nfs4_handle_exception(server, err, &exception); | |
3658 | } while (exception.retry); | |
3659 | return err; | |
3660 | } | |
3661 | ||
3662 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3663 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3664 | ||
3665 | /* | |
3666 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3667 | */ | |
3668 | static unsigned long | |
3669 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3670 | { | |
150030b7 | 3671 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3672 | timeout <<= 1; |
3673 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3674 | return NFS4_LOCK_MAXTIMEOUT; | |
3675 | return timeout; | |
3676 | } | |
3677 | ||
1da177e4 LT |
3678 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3679 | { | |
3680 | struct inode *inode = state->inode; | |
3681 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3682 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3683 | struct nfs_lockt_args arg = { |
1da177e4 | 3684 | .fh = NFS_FH(inode), |
911d1aaf | 3685 | .fl = request, |
1da177e4 | 3686 | }; |
911d1aaf TM |
3687 | struct nfs_lockt_res res = { |
3688 | .denied = request, | |
1da177e4 LT |
3689 | }; |
3690 | struct rpc_message msg = { | |
3691 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3692 | .rpc_argp = &arg, | |
3693 | .rpc_resp = &res, | |
3694 | .rpc_cred = state->owner->so_cred, | |
3695 | }; | |
1da177e4 LT |
3696 | struct nfs4_lock_state *lsp; |
3697 | int status; | |
3698 | ||
911d1aaf | 3699 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3700 | status = nfs4_set_lock_state(state, request); |
3701 | if (status != 0) | |
3702 | goto out; | |
3703 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3704 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3705 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3706 | switch (status) { |
3707 | case 0: | |
3708 | request->fl_type = F_UNLCK; | |
3709 | break; | |
3710 | case -NFS4ERR_DENIED: | |
3711 | status = 0; | |
1da177e4 | 3712 | } |
70cc6487 | 3713 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3714 | out: |
1da177e4 LT |
3715 | return status; |
3716 | } | |
3717 | ||
3718 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3719 | { | |
3720 | struct nfs4_exception exception = { }; | |
3721 | int err; | |
3722 | ||
3723 | do { | |
3724 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3725 | _nfs4_proc_getlk(state, cmd, request), | |
3726 | &exception); | |
3727 | } while (exception.retry); | |
3728 | return err; | |
3729 | } | |
3730 | ||
3731 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3732 | { | |
3733 | int res = 0; | |
3734 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3735 | case FL_POSIX: | |
3736 | res = posix_lock_file_wait(file, fl); | |
3737 | break; | |
3738 | case FL_FLOCK: | |
3739 | res = flock_lock_file_wait(file, fl); | |
3740 | break; | |
3741 | default: | |
3742 | BUG(); | |
3743 | } | |
1da177e4 LT |
3744 | return res; |
3745 | } | |
3746 | ||
faf5f49c | 3747 | struct nfs4_unlockdata { |
911d1aaf TM |
3748 | struct nfs_locku_args arg; |
3749 | struct nfs_locku_res res; | |
faf5f49c TM |
3750 | struct nfs4_lock_state *lsp; |
3751 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3752 | struct file_lock fl; |
3753 | const struct nfs_server *server; | |
26e976a8 | 3754 | unsigned long timestamp; |
faf5f49c TM |
3755 | }; |
3756 | ||
911d1aaf TM |
3757 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3758 | struct nfs_open_context *ctx, | |
3759 | struct nfs4_lock_state *lsp, | |
3760 | struct nfs_seqid *seqid) | |
3761 | { | |
3762 | struct nfs4_unlockdata *p; | |
3763 | struct inode *inode = lsp->ls_state->inode; | |
3764 | ||
8535b2be | 3765 | p = kzalloc(sizeof(*p), GFP_NOFS); |
911d1aaf TM |
3766 | if (p == NULL) |
3767 | return NULL; | |
3768 | p->arg.fh = NFS_FH(inode); | |
3769 | p->arg.fl = &p->fl; | |
3770 | p->arg.seqid = seqid; | |
c1d51931 | 3771 | p->res.seqid = seqid; |
5f7dbd5c | 3772 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3773 | p->arg.stateid = &lsp->ls_stateid; |
3774 | p->lsp = lsp; | |
3775 | atomic_inc(&lsp->ls_count); | |
3776 | /* Ensure we don't close file until we're done freeing locks! */ | |
3777 | p->ctx = get_nfs_open_context(ctx); | |
3778 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3779 | p->server = NFS_SERVER(inode); | |
3780 | return p; | |
3781 | } | |
3782 | ||
06f814a3 | 3783 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3784 | { |
963d8fe5 | 3785 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3786 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3787 | nfs4_put_lock_state(calldata->lsp); |
3788 | put_nfs_open_context(calldata->ctx); | |
3789 | kfree(calldata); | |
faf5f49c TM |
3790 | } |
3791 | ||
963d8fe5 | 3792 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3793 | { |
963d8fe5 | 3794 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3795 | |
14516c3a TM |
3796 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) |
3797 | return; | |
faf5f49c TM |
3798 | switch (task->tk_status) { |
3799 | case 0: | |
3800 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3801 | calldata->res.stateid.data, |
faf5f49c | 3802 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3803 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3804 | break; |
9e33bed5 TM |
3805 | case -NFS4ERR_BAD_STATEID: |
3806 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3807 | case -NFS4ERR_STALE_STATEID: |
3808 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3809 | break; |
3810 | default: | |
9e33bed5 | 3811 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
0110ee15 | 3812 | nfs_restart_rpc(task, |
d61e612a | 3813 | calldata->server->nfs_client); |
faf5f49c | 3814 | } |
faf5f49c TM |
3815 | } |
3816 | ||
4ce70ada | 3817 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3818 | { |
4ce70ada | 3819 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3820 | |
911d1aaf | 3821 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3822 | return; |
3823 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3824 | /* Note: exit _without_ running nfs4_locku_done */ |
3825 | task->tk_action = NULL; | |
faf5f49c TM |
3826 | return; |
3827 | } | |
26e976a8 | 3828 | calldata->timestamp = jiffies; |
035168ab | 3829 | if (nfs4_setup_sequence(calldata->server, |
a893693c AA |
3830 | &calldata->arg.seq_args, |
3831 | &calldata->res.seq_res, 1, task)) | |
3832 | return; | |
5138fde0 | 3833 | rpc_call_start(task); |
faf5f49c TM |
3834 | } |
3835 | ||
963d8fe5 | 3836 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3837 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3838 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3839 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3840 | }; |
3841 | ||
a5d16a4d TM |
3842 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3843 | struct nfs_open_context *ctx, | |
3844 | struct nfs4_lock_state *lsp, | |
3845 | struct nfs_seqid *seqid) | |
3846 | { | |
3847 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3848 | struct rpc_message msg = { |
3849 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3850 | .rpc_cred = ctx->cred, | |
3851 | }; | |
c970aa85 TM |
3852 | struct rpc_task_setup task_setup_data = { |
3853 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3854 | .rpc_message = &msg, |
c970aa85 | 3855 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3856 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3857 | .flags = RPC_TASK_ASYNC, |
3858 | }; | |
a5d16a4d | 3859 | |
137d6aca FF |
3860 | /* Ensure this is an unlock - when canceling a lock, the |
3861 | * canceled lock is passed in, and it won't be an unlock. | |
3862 | */ | |
3863 | fl->fl_type = F_UNLCK; | |
3864 | ||
a5d16a4d TM |
3865 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3866 | if (data == NULL) { | |
3867 | nfs_free_seqid(seqid); | |
3868 | return ERR_PTR(-ENOMEM); | |
3869 | } | |
3870 | ||
5138fde0 TM |
3871 | msg.rpc_argp = &data->arg, |
3872 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3873 | task_setup_data.callback_data = data; |
3874 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3875 | } |
3876 | ||
faf5f49c TM |
3877 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3878 | { | |
19e03c57 | 3879 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3880 | struct nfs_seqid *seqid; |
1da177e4 | 3881 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3882 | struct rpc_task *task; |
3883 | int status = 0; | |
536ff0f8 | 3884 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3885 | |
8d0a8a9d | 3886 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3887 | /* Unlock _before_ we do the RPC call */ |
3888 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3889 | down_read(&nfsi->rwsem); |
3890 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3891 | up_read(&nfsi->rwsem); | |
9b073574 | 3892 | goto out; |
19e03c57 TM |
3893 | } |
3894 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3895 | if (status != 0) |
9b073574 TM |
3896 | goto out; |
3897 | /* Is this a delegated lock? */ | |
3898 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3899 | goto out; | |
8d0a8a9d | 3900 | lsp = request->fl_u.nfs4_fl.owner; |
8535b2be | 3901 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); |
9b073574 | 3902 | status = -ENOMEM; |
911d1aaf | 3903 | if (seqid == NULL) |
9b073574 | 3904 | goto out; |
cd3758e3 | 3905 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3906 | status = PTR_ERR(task); |
3907 | if (IS_ERR(task)) | |
9b073574 | 3908 | goto out; |
a5d16a4d | 3909 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3910 | rpc_put_task(task); |
9b073574 | 3911 | out: |
536ff0f8 | 3912 | request->fl_flags = fl_flags; |
1da177e4 LT |
3913 | return status; |
3914 | } | |
3915 | ||
a5d16a4d TM |
3916 | struct nfs4_lockdata { |
3917 | struct nfs_lock_args arg; | |
3918 | struct nfs_lock_res res; | |
3919 | struct nfs4_lock_state *lsp; | |
3920 | struct nfs_open_context *ctx; | |
3921 | struct file_lock fl; | |
26e976a8 | 3922 | unsigned long timestamp; |
a5d16a4d TM |
3923 | int rpc_status; |
3924 | int cancelled; | |
66179efe | 3925 | struct nfs_server *server; |
a5d16a4d TM |
3926 | }; |
3927 | ||
3928 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
8535b2be TM |
3929 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, |
3930 | gfp_t gfp_mask) | |
1da177e4 | 3931 | { |
a5d16a4d TM |
3932 | struct nfs4_lockdata *p; |
3933 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3934 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d | 3935 | |
8535b2be | 3936 | p = kzalloc(sizeof(*p), gfp_mask); |
a5d16a4d TM |
3937 | if (p == NULL) |
3938 | return NULL; | |
3939 | ||
3940 | p->arg.fh = NFS_FH(inode); | |
3941 | p->arg.fl = &p->fl; | |
8535b2be | 3942 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); |
2f74c0a0 TM |
3943 | if (p->arg.open_seqid == NULL) |
3944 | goto out_free; | |
8535b2be | 3945 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); |
a5d16a4d | 3946 | if (p->arg.lock_seqid == NULL) |
2f74c0a0 | 3947 | goto out_free_seqid; |
a5d16a4d | 3948 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3949 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3950 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3951 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 3952 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d | 3953 | p->lsp = lsp; |
66179efe | 3954 | p->server = server; |
a5d16a4d TM |
3955 | atomic_inc(&lsp->ls_count); |
3956 | p->ctx = get_nfs_open_context(ctx); | |
3957 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3958 | return p; | |
2f74c0a0 TM |
3959 | out_free_seqid: |
3960 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3961 | out_free: |
3962 | kfree(p); | |
3963 | return NULL; | |
3964 | } | |
3965 | ||
3966 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3967 | { | |
3968 | struct nfs4_lockdata *data = calldata; | |
3969 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3970 | |
3110ff80 | 3971 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3972 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3973 | return; | |
a5d16a4d TM |
3974 | /* Do we need to do an open_to_lock_owner? */ |
3975 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3976 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3977 | return; | |
a5d16a4d TM |
3978 | data->arg.open_stateid = &state->stateid; |
3979 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3980 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3981 | } else |
3982 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3983 | data->timestamp = jiffies; |
035168ab TM |
3984 | if (nfs4_setup_sequence(data->server, |
3985 | &data->arg.seq_args, | |
66179efe AA |
3986 | &data->res.seq_res, 1, task)) |
3987 | return; | |
5138fde0 | 3988 | rpc_call_start(task); |
3110ff80 | 3989 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3990 | } |
3991 | ||
b257957e AB |
3992 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
3993 | { | |
3994 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
3995 | nfs4_lock_prepare(task, calldata); | |
3996 | } | |
3997 | ||
a5d16a4d TM |
3998 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
3999 | { | |
4000 | struct nfs4_lockdata *data = calldata; | |
4001 | ||
3110ff80 | 4002 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 4003 | |
14516c3a TM |
4004 | if (!nfs4_sequence_done(task, &data->res.seq_res)) |
4005 | return; | |
66179efe | 4006 | |
a5d16a4d | 4007 | data->rpc_status = task->tk_status; |
a5d16a4d | 4008 | if (data->arg.new_lock_owner != 0) { |
a5d16a4d TM |
4009 | if (data->rpc_status == 0) |
4010 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4011 | else | |
4012 | goto out; | |
4013 | } | |
4014 | if (data->rpc_status == 0) { | |
4015 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
4016 | sizeof(data->lsp->ls_stateid.data)); | |
4017 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 4018 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 4019 | } |
a5d16a4d | 4020 | out: |
3110ff80 | 4021 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
4022 | } |
4023 | ||
4024 | static void nfs4_lock_release(void *calldata) | |
4025 | { | |
4026 | struct nfs4_lockdata *data = calldata; | |
4027 | ||
3110ff80 | 4028 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 4029 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
4030 | if (data->cancelled != 0) { |
4031 | struct rpc_task *task; | |
4032 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4033 | data->arg.lock_seqid); | |
4034 | if (!IS_ERR(task)) | |
e6b3c4db | 4035 | rpc_put_task(task); |
3110ff80 | 4036 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
4037 | } else |
4038 | nfs_free_seqid(data->arg.lock_seqid); | |
4039 | nfs4_put_lock_state(data->lsp); | |
4040 | put_nfs_open_context(data->ctx); | |
4041 | kfree(data); | |
3110ff80 | 4042 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
4043 | } |
4044 | ||
4045 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4046 | .rpc_call_prepare = nfs4_lock_prepare, | |
4047 | .rpc_call_done = nfs4_lock_done, | |
4048 | .rpc_release = nfs4_lock_release, | |
4049 | }; | |
4050 | ||
b257957e AB |
4051 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
4052 | .rpc_call_prepare = nfs4_recover_lock_prepare, | |
4053 | .rpc_call_done = nfs4_lock_done, | |
4054 | .rpc_release = nfs4_lock_release, | |
4055 | }; | |
4056 | ||
2bee72a6 TM |
4057 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
4058 | { | |
4059 | struct nfs_client *clp = server->nfs_client; | |
4060 | struct nfs4_state *state = lsp->ls_state; | |
4061 | ||
4062 | switch (error) { | |
4063 | case -NFS4ERR_ADMIN_REVOKED: | |
4064 | case -NFS4ERR_BAD_STATEID: | |
4065 | case -NFS4ERR_EXPIRED: | |
4066 | if (new_lock_owner != 0 || | |
4067 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4068 | nfs4_state_mark_reclaim_nograce(clp, state); | |
4069 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
a2c0b9e2 TM |
4070 | break; |
4071 | case -NFS4ERR_STALE_STATEID: | |
4072 | if (new_lock_owner != 0 || | |
4073 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4074 | nfs4_state_mark_reclaim_reboot(clp, state); | |
4075 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
2bee72a6 TM |
4076 | }; |
4077 | } | |
4078 | ||
afe6c27c | 4079 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
a5d16a4d TM |
4080 | { |
4081 | struct nfs4_lockdata *data; | |
4082 | struct rpc_task *task; | |
5138fde0 TM |
4083 | struct rpc_message msg = { |
4084 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4085 | .rpc_cred = state->owner->so_cred, | |
4086 | }; | |
c970aa85 TM |
4087 | struct rpc_task_setup task_setup_data = { |
4088 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 4089 | .rpc_message = &msg, |
c970aa85 | 4090 | .callback_ops = &nfs4_lock_ops, |
101070ca | 4091 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
4092 | .flags = RPC_TASK_ASYNC, |
4093 | }; | |
a5d16a4d TM |
4094 | int ret; |
4095 | ||
3110ff80 | 4096 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 4097 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
8535b2be TM |
4098 | fl->fl_u.nfs4_fl.owner, |
4099 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); | |
a5d16a4d TM |
4100 | if (data == NULL) |
4101 | return -ENOMEM; | |
4102 | if (IS_SETLKW(cmd)) | |
4103 | data->arg.block = 1; | |
b257957e AB |
4104 | if (recovery_type > NFS_LOCK_NEW) { |
4105 | if (recovery_type == NFS_LOCK_RECLAIM) | |
afe6c27c | 4106 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
b257957e AB |
4107 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
4108 | } | |
5138fde0 TM |
4109 | msg.rpc_argp = &data->arg, |
4110 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
4111 | task_setup_data.callback_data = data; |
4112 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 4113 | if (IS_ERR(task)) |
a5d16a4d | 4114 | return PTR_ERR(task); |
a5d16a4d TM |
4115 | ret = nfs4_wait_for_completion_rpc_task(task); |
4116 | if (ret == 0) { | |
4117 | ret = data->rpc_status; | |
2bee72a6 TM |
4118 | if (ret) |
4119 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4120 | data->arg.new_lock_owner, ret); | |
a5d16a4d TM |
4121 | } else |
4122 | data->cancelled = 1; | |
e6b3c4db | 4123 | rpc_put_task(task); |
3110ff80 | 4124 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 4125 | return ret; |
1da177e4 LT |
4126 | } |
4127 | ||
4128 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4129 | { | |
202b50dc TM |
4130 | struct nfs_server *server = NFS_SERVER(state->inode); |
4131 | struct nfs4_exception exception = { }; | |
4132 | int err; | |
4133 | ||
4134 | do { | |
42a2d13e TM |
4135 | /* Cache the lock if possible... */ |
4136 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4137 | return 0; | |
afe6c27c | 4138 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
2c643488 | 4139 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
4140 | break; |
4141 | nfs4_handle_exception(server, err, &exception); | |
4142 | } while (exception.retry); | |
4143 | return err; | |
1da177e4 LT |
4144 | } |
4145 | ||
4146 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4147 | { | |
202b50dc TM |
4148 | struct nfs_server *server = NFS_SERVER(state->inode); |
4149 | struct nfs4_exception exception = { }; | |
4150 | int err; | |
4151 | ||
6bfc93ef TM |
4152 | err = nfs4_set_lock_state(state, request); |
4153 | if (err != 0) | |
4154 | return err; | |
202b50dc | 4155 | do { |
42a2d13e TM |
4156 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
4157 | return 0; | |
afe6c27c | 4158 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
a9ed2e25 TM |
4159 | switch (err) { |
4160 | default: | |
4161 | goto out; | |
4162 | case -NFS4ERR_GRACE: | |
4163 | case -NFS4ERR_DELAY: | |
2c643488 | 4164 | case -EKEYEXPIRED: |
a9ed2e25 TM |
4165 | nfs4_handle_exception(server, err, &exception); |
4166 | err = 0; | |
4167 | } | |
202b50dc | 4168 | } while (exception.retry); |
a9ed2e25 | 4169 | out: |
202b50dc | 4170 | return err; |
1da177e4 LT |
4171 | } |
4172 | ||
4173 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4174 | { | |
19e03c57 | 4175 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 4176 | unsigned char fl_flags = request->fl_flags; |
8e469ebd | 4177 | int status = -ENOLCK; |
1da177e4 | 4178 | |
8e469ebd TM |
4179 | if ((fl_flags & FL_POSIX) && |
4180 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4181 | goto out; | |
6bfc93ef | 4182 | /* Is this a delegated open? */ |
6bfc93ef TM |
4183 | status = nfs4_set_lock_state(state, request); |
4184 | if (status != 0) | |
4185 | goto out; | |
01c3b861 TM |
4186 | request->fl_flags |= FL_ACCESS; |
4187 | status = do_vfs_lock(request->fl_file, request); | |
4188 | if (status < 0) | |
4189 | goto out; | |
19e03c57 | 4190 | down_read(&nfsi->rwsem); |
01c3b861 | 4191 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 4192 | /* Yes: cache locks! */ |
01c3b861 | 4193 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
4194 | request->fl_flags = fl_flags & ~FL_SLEEP; |
4195 | status = do_vfs_lock(request->fl_file, request); | |
4196 | goto out_unlock; | |
01c3b861 | 4197 | } |
afe6c27c | 4198 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
6bfc93ef | 4199 | if (status != 0) |
01c3b861 | 4200 | goto out_unlock; |
6bfc93ef | 4201 | /* Note: we always want to sleep here! */ |
01c3b861 | 4202 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 4203 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 4204 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 4205 | out_unlock: |
19e03c57 | 4206 | up_read(&nfsi->rwsem); |
01c3b861 TM |
4207 | out: |
4208 | request->fl_flags = fl_flags; | |
1da177e4 LT |
4209 | return status; |
4210 | } | |
4211 | ||
4212 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4213 | { | |
4214 | struct nfs4_exception exception = { }; | |
4215 | int err; | |
4216 | ||
4217 | do { | |
965b5d67 TM |
4218 | err = _nfs4_proc_setlk(state, cmd, request); |
4219 | if (err == -NFS4ERR_DENIED) | |
4220 | err = -EAGAIN; | |
1da177e4 | 4221 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
965b5d67 | 4222 | err, &exception); |
1da177e4 LT |
4223 | } while (exception.retry); |
4224 | return err; | |
4225 | } | |
4226 | ||
4227 | static int | |
4228 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4229 | { | |
4230 | struct nfs_open_context *ctx; | |
4231 | struct nfs4_state *state; | |
4232 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4233 | int status; | |
4234 | ||
4235 | /* verify open state */ | |
cd3758e3 | 4236 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4237 | state = ctx->state; |
4238 | ||
4239 | if (request->fl_start < 0 || request->fl_end < 0) | |
4240 | return -EINVAL; | |
4241 | ||
d953126a TM |
4242 | if (IS_GETLK(cmd)) { |
4243 | if (state != NULL) | |
4244 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4245 | return 0; | |
4246 | } | |
1da177e4 LT |
4247 | |
4248 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4249 | return -EINVAL; | |
4250 | ||
d953126a TM |
4251 | if (request->fl_type == F_UNLCK) { |
4252 | if (state != NULL) | |
4253 | return nfs4_proc_unlck(state, cmd, request); | |
4254 | return 0; | |
4255 | } | |
1da177e4 | 4256 | |
d953126a TM |
4257 | if (state == NULL) |
4258 | return -ENOLCK; | |
1da177e4 LT |
4259 | do { |
4260 | status = nfs4_proc_setlk(state, cmd, request); | |
4261 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4262 | break; | |
4263 | timeout = nfs4_set_lock_task_retry(timeout); | |
4264 | status = -ERESTARTSYS; | |
4265 | if (signalled()) | |
4266 | break; | |
4267 | } while(status < 0); | |
1da177e4 LT |
4268 | return status; |
4269 | } | |
4270 | ||
888e694c TM |
4271 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4272 | { | |
4273 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4274 | struct nfs4_exception exception = { }; | |
4275 | int err; | |
4276 | ||
4277 | err = nfs4_set_lock_state(state, fl); | |
4278 | if (err != 0) | |
4279 | goto out; | |
4280 | do { | |
afe6c27c | 4281 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
d5122201 TM |
4282 | switch (err) { |
4283 | default: | |
4284 | printk(KERN_ERR "%s: unhandled error %d.\n", | |
4285 | __func__, err); | |
4286 | case 0: | |
965b5d67 | 4287 | case -ESTALE: |
d5122201 TM |
4288 | goto out; |
4289 | case -NFS4ERR_EXPIRED: | |
4290 | case -NFS4ERR_STALE_CLIENTID: | |
965b5d67 | 4291 | case -NFS4ERR_STALE_STATEID: |
74e7bb73 RL |
4292 | case -NFS4ERR_BADSESSION: |
4293 | case -NFS4ERR_BADSLOT: | |
4294 | case -NFS4ERR_BAD_HIGH_SLOT: | |
4295 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
4296 | case -NFS4ERR_DEADSESSION: | |
d5122201 TM |
4297 | nfs4_schedule_state_recovery(server->nfs_client); |
4298 | goto out; | |
965b5d67 TM |
4299 | case -ERESTARTSYS: |
4300 | /* | |
4301 | * The show must go on: exit, but mark the | |
4302 | * stateid as needing recovery. | |
4303 | */ | |
4304 | case -NFS4ERR_ADMIN_REVOKED: | |
4305 | case -NFS4ERR_BAD_STATEID: | |
4306 | case -NFS4ERR_OPENMODE: | |
4307 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
4308 | err = 0; | |
4309 | goto out; | |
4310 | case -ENOMEM: | |
4311 | case -NFS4ERR_DENIED: | |
4312 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
4313 | err = 0; | |
4314 | goto out; | |
d5122201 | 4315 | case -NFS4ERR_DELAY: |
2c643488 | 4316 | case -EKEYEXPIRED: |
d5122201 TM |
4317 | break; |
4318 | } | |
888e694c TM |
4319 | err = nfs4_handle_exception(server, err, &exception); |
4320 | } while (exception.retry); | |
4321 | out: | |
4322 | return err; | |
4323 | } | |
6b3b5496 | 4324 | |
d3c7b7cc TM |
4325 | static void nfs4_release_lockowner_release(void *calldata) |
4326 | { | |
4327 | kfree(calldata); | |
4328 | } | |
4329 | ||
4330 | const struct rpc_call_ops nfs4_release_lockowner_ops = { | |
4331 | .rpc_release = nfs4_release_lockowner_release, | |
4332 | }; | |
4333 | ||
4334 | void nfs4_release_lockowner(const struct nfs4_lock_state *lsp) | |
4335 | { | |
4336 | struct nfs_server *server = lsp->ls_state->owner->so_server; | |
4337 | struct nfs_release_lockowner_args *args; | |
4338 | struct rpc_message msg = { | |
4339 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], | |
4340 | }; | |
4341 | ||
4342 | if (server->nfs_client->cl_mvops->minor_version != 0) | |
4343 | return; | |
4344 | args = kmalloc(sizeof(*args), GFP_NOFS); | |
4345 | if (!args) | |
4346 | return; | |
4347 | args->lock_owner.clientid = server->nfs_client->cl_clientid; | |
4348 | args->lock_owner.id = lsp->ls_id.id; | |
4349 | msg.rpc_argp = args; | |
4350 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args); | |
4351 | } | |
4352 | ||
aa1870af BF |
4353 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4354 | ||
6b3b5496 BF |
4355 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4356 | size_t buflen, int flags) | |
4357 | { | |
4b580ee3 BF |
4358 | struct inode *inode = dentry->d_inode; |
4359 | ||
4360 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4361 | return -EOPNOTSUPP; | |
4362 | ||
4b580ee3 | 4363 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4364 | } |
4365 | ||
4366 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4367 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4368 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4369 | * attributes in kernel-managed attribute namespaces. */ | |
4370 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4371 | size_t buflen) | |
4372 | { | |
aa1870af BF |
4373 | struct inode *inode = dentry->d_inode; |
4374 | ||
4375 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4376 | return -EOPNOTSUPP; | |
4377 | ||
4378 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4379 | } |
4380 | ||
4381 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4382 | { | |
aa1870af | 4383 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4384 | |
096455a2 BF |
4385 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4386 | return 0; | |
6b3b5496 BF |
4387 | if (buf && buflen < len) |
4388 | return -ERANGE; | |
4389 | if (buf) | |
aa1870af BF |
4390 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4391 | return len; | |
6b3b5496 BF |
4392 | } |
4393 | ||
69aaaae1 TM |
4394 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4395 | { | |
4396 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4397 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4398 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4399 | return; | |
4400 | ||
4401 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4402 | NFS_ATTR_FATTR_NLINK; | |
4403 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4404 | fattr->nlink = 2; | |
4405 | } | |
4406 | ||
56659e99 | 4407 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4408 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4409 | { |
4410 | struct nfs_server *server = NFS_SERVER(dir); | |
4411 | u32 bitmask[2] = { | |
361e624f MN |
4412 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4413 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4414 | }; |
4415 | struct nfs4_fs_locations_arg args = { | |
4416 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4417 | .name = name, |
683b57b4 TM |
4418 | .page = page, |
4419 | .bitmask = bitmask, | |
4420 | }; | |
22958463 BH |
4421 | struct nfs4_fs_locations_res res = { |
4422 | .fs_locations = fs_locations, | |
4423 | }; | |
683b57b4 TM |
4424 | struct rpc_message msg = { |
4425 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4426 | .rpc_argp = &args, | |
22958463 | 4427 | .rpc_resp = &res, |
683b57b4 TM |
4428 | }; |
4429 | int status; | |
4430 | ||
3110ff80 | 4431 | dprintk("%s: start\n", __func__); |
c228fd3a | 4432 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4433 | fs_locations->server = server; |
830b8e33 | 4434 | fs_locations->nlocations = 0; |
cccef3b9 | 4435 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4436 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4437 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4438 | return status; |
4439 | } | |
4440 | ||
557134a3 | 4441 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4442 | /* |
4443 | * nfs4_proc_exchange_id() | |
4444 | * | |
4445 | * Since the clientid has expired, all compounds using sessions | |
4446 | * associated with the stale clientid will be returning | |
4447 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4448 | * be in some phase of session reset. | |
4449 | */ | |
4d643d1d | 4450 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
99fe60d0 BH |
4451 | { |
4452 | nfs4_verifier verifier; | |
4453 | struct nfs41_exchange_id_args args = { | |
4454 | .client = clp, | |
4455 | .flags = clp->cl_exchange_flags, | |
4456 | }; | |
4457 | struct nfs41_exchange_id_res res = { | |
4458 | .client = clp, | |
4459 | }; | |
4460 | int status; | |
4461 | struct rpc_message msg = { | |
4462 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4463 | .rpc_argp = &args, | |
4464 | .rpc_resp = &res, | |
4465 | .rpc_cred = cred, | |
4466 | }; | |
4467 | __be32 *p; | |
4468 | ||
4469 | dprintk("--> %s\n", __func__); | |
4470 | BUG_ON(clp == NULL); | |
a7b72103 | 4471 | |
7b183d0d AB |
4472 | /* Remove server-only flags */ |
4473 | args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; | |
4474 | ||
99fe60d0 BH |
4475 | p = (u32 *)verifier.data; |
4476 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4477 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4478 | args.verifier = &verifier; | |
4479 | ||
4480 | while (1) { | |
4481 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4482 | "%s/%s %u", | |
4483 | clp->cl_ipaddr, | |
4484 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4485 | RPC_DISPLAY_ADDR), | |
4486 | clp->cl_id_uniquifier); | |
4487 | ||
4488 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4489 | ||
180b62a3 | 4490 | if (status != -NFS4ERR_CLID_INUSE) |
99fe60d0 BH |
4491 | break; |
4492 | ||
4493 | if (signalled()) | |
4494 | break; | |
4495 | ||
4496 | if (++clp->cl_id_uniquifier == 0) | |
4497 | break; | |
4498 | } | |
4499 | ||
4500 | dprintk("<-- %s status= %d\n", __func__, status); | |
4501 | return status; | |
4502 | } | |
4503 | ||
2050f0cc AA |
4504 | struct nfs4_get_lease_time_data { |
4505 | struct nfs4_get_lease_time_args *args; | |
4506 | struct nfs4_get_lease_time_res *res; | |
4507 | struct nfs_client *clp; | |
4508 | }; | |
4509 | ||
4510 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4511 | void *calldata) | |
4512 | { | |
4513 | int ret; | |
4514 | struct nfs4_get_lease_time_data *data = | |
4515 | (struct nfs4_get_lease_time_data *)calldata; | |
4516 | ||
4517 | dprintk("--> %s\n", __func__); | |
689cf5c1 | 4518 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
2050f0cc AA |
4519 | /* just setup sequence, do not trigger session recovery |
4520 | since we're invoked within one */ | |
4521 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
689cf5c1 AB |
4522 | &data->args->la_seq_args, |
4523 | &data->res->lr_seq_res, 0, task); | |
2050f0cc AA |
4524 | |
4525 | BUG_ON(ret == -EAGAIN); | |
4526 | rpc_call_start(task); | |
4527 | dprintk("<-- %s\n", __func__); | |
4528 | } | |
4529 | ||
4530 | /* | |
4531 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4532 | * from sequence operation or clientid errors. | |
4533 | */ | |
4534 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4535 | { | |
4536 | struct nfs4_get_lease_time_data *data = | |
4537 | (struct nfs4_get_lease_time_data *)calldata; | |
4538 | ||
4539 | dprintk("--> %s\n", __func__); | |
14516c3a TM |
4540 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) |
4541 | return; | |
2050f0cc AA |
4542 | switch (task->tk_status) { |
4543 | case -NFS4ERR_DELAY: | |
4544 | case -NFS4ERR_GRACE: | |
2c643488 | 4545 | case -EKEYEXPIRED: |
2050f0cc AA |
4546 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
4547 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4548 | task->tk_status = 0; | |
0110ee15 | 4549 | nfs_restart_rpc(task, data->clp); |
2050f0cc AA |
4550 | return; |
4551 | } | |
2050f0cc AA |
4552 | dprintk("<-- %s\n", __func__); |
4553 | } | |
4554 | ||
4555 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4556 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4557 | .rpc_call_done = nfs4_get_lease_time_done, | |
4558 | }; | |
4559 | ||
4560 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4561 | { | |
4562 | struct rpc_task *task; | |
4563 | struct nfs4_get_lease_time_args args; | |
4564 | struct nfs4_get_lease_time_res res = { | |
4565 | .lr_fsinfo = fsinfo, | |
4566 | }; | |
4567 | struct nfs4_get_lease_time_data data = { | |
4568 | .args = &args, | |
4569 | .res = &res, | |
4570 | .clp = clp, | |
4571 | }; | |
4572 | struct rpc_message msg = { | |
4573 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4574 | .rpc_argp = &args, | |
4575 | .rpc_resp = &res, | |
4576 | }; | |
4577 | struct rpc_task_setup task_setup = { | |
4578 | .rpc_client = clp->cl_rpcclient, | |
4579 | .rpc_message = &msg, | |
4580 | .callback_ops = &nfs4_get_lease_time_ops, | |
4581 | .callback_data = &data | |
4582 | }; | |
4583 | int status; | |
4584 | ||
4585 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4586 | dprintk("--> %s\n", __func__); | |
4587 | task = rpc_run_task(&task_setup); | |
4588 | ||
4589 | if (IS_ERR(task)) | |
4590 | status = PTR_ERR(task); | |
4591 | else { | |
4592 | status = task->tk_status; | |
4593 | rpc_put_task(task); | |
4594 | } | |
4595 | dprintk("<-- %s return %d\n", __func__, status); | |
4596 | ||
4597 | return status; | |
4598 | } | |
4599 | ||
b73dafa7 RL |
4600 | /* |
4601 | * Reset a slot table | |
4602 | */ | |
104aeba4 AA |
4603 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
4604 | int ivalue) | |
ac72b7b3 | 4605 | { |
104aeba4 | 4606 | struct nfs4_slot *new = NULL; |
b73dafa7 | 4607 | int i; |
ac72b7b3 AA |
4608 | int ret = 0; |
4609 | ||
104aeba4 AA |
4610 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
4611 | max_reqs, tbl->max_slots); | |
ac72b7b3 | 4612 | |
104aeba4 AA |
4613 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
4614 | if (max_reqs != tbl->max_slots) { | |
4615 | ret = -ENOMEM; | |
4616 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), | |
8535b2be | 4617 | GFP_NOFS); |
104aeba4 AA |
4618 | if (!new) |
4619 | goto out; | |
4620 | ret = 0; | |
4621 | kfree(tbl->slots); | |
ac72b7b3 AA |
4622 | } |
4623 | spin_lock(&tbl->slot_tbl_lock); | |
104aeba4 AA |
4624 | if (new) { |
4625 | tbl->slots = new; | |
4626 | tbl->max_slots = max_reqs; | |
4627 | } | |
4628 | for (i = 0; i < tbl->max_slots; ++i) | |
b73dafa7 | 4629 | tbl->slots[i].seq_nr = ivalue; |
ac72b7b3 AA |
4630 | spin_unlock(&tbl->slot_tbl_lock); |
4631 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4632 | tbl, tbl->slots, tbl->max_slots); | |
4633 | out: | |
4634 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4635 | return ret; | |
4636 | } | |
4637 | ||
b73dafa7 RL |
4638 | /* |
4639 | * Reset the forechannel and backchannel slot tables | |
4640 | */ | |
4641 | static int nfs4_reset_slot_tables(struct nfs4_session *session) | |
4642 | { | |
4643 | int status; | |
4644 | ||
4645 | status = nfs4_reset_slot_table(&session->fc_slot_table, | |
104aeba4 | 4646 | session->fc_attrs.max_reqs, 1); |
f8625a6a RL |
4647 | if (status) |
4648 | return status; | |
4649 | ||
4650 | status = nfs4_reset_slot_table(&session->bc_slot_table, | |
104aeba4 | 4651 | session->bc_attrs.max_reqs, 0); |
b73dafa7 RL |
4652 | return status; |
4653 | } | |
4654 | ||
f8625a6a RL |
4655 | /* Destroy the slot table */ |
4656 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) | |
4657 | { | |
4658 | if (session->fc_slot_table.slots != NULL) { | |
4659 | kfree(session->fc_slot_table.slots); | |
4660 | session->fc_slot_table.slots = NULL; | |
4661 | } | |
4662 | if (session->bc_slot_table.slots != NULL) { | |
4663 | kfree(session->bc_slot_table.slots); | |
4664 | session->bc_slot_table.slots = NULL; | |
4665 | } | |
4666 | return; | |
4667 | } | |
4668 | ||
fc931582 AA |
4669 | /* |
4670 | * Initialize slot table | |
4671 | */ | |
050047ce RL |
4672 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
4673 | int max_slots, int ivalue) | |
fc931582 | 4674 | { |
fc931582 AA |
4675 | struct nfs4_slot *slot; |
4676 | int ret = -ENOMEM; | |
4677 | ||
4678 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4679 | ||
050047ce | 4680 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
fc931582 | 4681 | |
8535b2be | 4682 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS); |
fc931582 AA |
4683 | if (!slot) |
4684 | goto out; | |
fc931582 AA |
4685 | ret = 0; |
4686 | ||
4687 | spin_lock(&tbl->slot_tbl_lock); | |
fc931582 AA |
4688 | tbl->max_slots = max_slots; |
4689 | tbl->slots = slot; | |
4690 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4691 | spin_unlock(&tbl->slot_tbl_lock); | |
4692 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4693 | tbl, tbl->slots, tbl->max_slots); | |
4694 | out: | |
4695 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4696 | return ret; | |
fc931582 AA |
4697 | } |
4698 | ||
050047ce RL |
4699 | /* |
4700 | * Initialize the forechannel and backchannel tables | |
4701 | */ | |
4702 | static int nfs4_init_slot_tables(struct nfs4_session *session) | |
4703 | { | |
f26468fb TM |
4704 | struct nfs4_slot_table *tbl; |
4705 | int status = 0; | |
050047ce | 4706 | |
f26468fb TM |
4707 | tbl = &session->fc_slot_table; |
4708 | if (tbl->slots == NULL) { | |
4709 | status = nfs4_init_slot_table(tbl, | |
4710 | session->fc_attrs.max_reqs, 1); | |
4711 | if (status) | |
4712 | return status; | |
4713 | } | |
050047ce | 4714 | |
f26468fb TM |
4715 | tbl = &session->bc_slot_table; |
4716 | if (tbl->slots == NULL) { | |
4717 | status = nfs4_init_slot_table(tbl, | |
4718 | session->bc_attrs.max_reqs, 0); | |
4719 | if (status) | |
4720 | nfs4_destroy_slot_tables(session); | |
4721 | } | |
f8625a6a RL |
4722 | |
4723 | return status; | |
557134a3 AA |
4724 | } |
4725 | ||
4726 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4727 | { | |
4728 | struct nfs4_session *session; | |
4729 | struct nfs4_slot_table *tbl; | |
4730 | ||
8535b2be | 4731 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); |
557134a3 AA |
4732 | if (!session) |
4733 | return NULL; | |
76db6d95 | 4734 | |
ea028ac9 | 4735 | init_completion(&session->complete); |
76db6d95 | 4736 | |
557134a3 | 4737 | tbl = &session->fc_slot_table; |
9dfdf404 | 4738 | tbl->highest_used_slotid = -1; |
557134a3 | 4739 | spin_lock_init(&tbl->slot_tbl_lock); |
689cf5c1 | 4740 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
f8625a6a RL |
4741 | |
4742 | tbl = &session->bc_slot_table; | |
9dfdf404 | 4743 | tbl->highest_used_slotid = -1; |
f8625a6a RL |
4744 | spin_lock_init(&tbl->slot_tbl_lock); |
4745 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); | |
4746 | ||
1055d76d TM |
4747 | session->session_state = 1<<NFS4_SESSION_INITING; |
4748 | ||
557134a3 AA |
4749 | session->clp = clp; |
4750 | return session; | |
4751 | } | |
4752 | ||
4753 | void nfs4_destroy_session(struct nfs4_session *session) | |
4754 | { | |
5a0ffe54 AA |
4755 | nfs4_proc_destroy_session(session); |
4756 | dprintk("%s Destroy backchannel for xprt %p\n", | |
4757 | __func__, session->clp->cl_rpcclient->cl_xprt); | |
4758 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, | |
4759 | NFS41_BC_MIN_CALLBACKS); | |
f8625a6a | 4760 | nfs4_destroy_slot_tables(session); |
557134a3 AA |
4761 | kfree(session); |
4762 | } | |
4763 | ||
fc931582 AA |
4764 | /* |
4765 | * Initialize the values to be used by the client in CREATE_SESSION | |
4766 | * If nfs4_init_session set the fore channel request and response sizes, | |
4767 | * use them. | |
4768 | * | |
4769 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4770 | * always set csa_cachethis to FALSE because the current implementation | |
4771 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4772 | */ | |
4773 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4774 | { | |
4775 | struct nfs4_session *session = args->client->cl_session; | |
4776 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4777 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4778 | ||
4779 | if (mxrqst_sz == 0) | |
4780 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4781 | if (mxresp_sz == 0) | |
4782 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4783 | /* Fore channel attributes */ | |
4784 | args->fc_attrs.headerpadsz = 0; | |
4785 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4786 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
fc931582 AA |
4787 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
4788 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4789 | ||
4790 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
8e0d46e1 | 4791 | "max_ops=%u max_reqs=%u\n", |
fc931582 AA |
4792 | __func__, |
4793 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
8e0d46e1 | 4794 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
fc931582 AA |
4795 | |
4796 | /* Back channel attributes */ | |
4797 | args->bc_attrs.headerpadsz = 0; | |
4798 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4799 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4800 | args->bc_attrs.max_resp_sz_cached = 0; | |
4801 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4802 | args->bc_attrs.max_reqs = 1; | |
4803 | ||
4804 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4805 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4806 | __func__, | |
4807 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4808 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4809 | args->bc_attrs.max_reqs); | |
4810 | } | |
4811 | ||
8d35301d AA |
4812 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) |
4813 | { | |
4814 | if (rcvd <= sent) | |
4815 | return 0; | |
4816 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4817 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4818 | return -EINVAL; | |
4819 | } | |
4820 | ||
4821 | #define _verify_fore_channel_attr(_name_) \ | |
4822 | _verify_channel_attr("fore", #_name_, \ | |
4823 | args->fc_attrs._name_, \ | |
4824 | session->fc_attrs._name_) | |
4825 | ||
4826 | #define _verify_back_channel_attr(_name_) \ | |
4827 | _verify_channel_attr("back", #_name_, \ | |
4828 | args->bc_attrs._name_, \ | |
4829 | session->bc_attrs._name_) | |
4830 | ||
4831 | /* | |
4832 | * The server is not allowed to increase the fore channel header pad size, | |
4833 | * maximum response size, or maximum number of operations. | |
4834 | * | |
4835 | * The back channel attributes are only negotiatied down: We send what the | |
4836 | * (back channel) server insists upon. | |
4837 | */ | |
4838 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4839 | struct nfs4_session *session) | |
4840 | { | |
4841 | int ret = 0; | |
4842 | ||
4843 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4844 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4845 | ret |= _verify_fore_channel_attr(max_ops); | |
4846 | ||
4847 | ret |= _verify_back_channel_attr(headerpadsz); | |
4848 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4849 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4850 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4851 | ret |= _verify_back_channel_attr(max_ops); | |
4852 | ret |= _verify_back_channel_attr(max_reqs); | |
4853 | ||
4854 | return ret; | |
4855 | } | |
4856 | ||
fc931582 AA |
4857 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
4858 | { | |
4859 | struct nfs4_session *session = clp->cl_session; | |
4860 | struct nfs41_create_session_args args = { | |
4861 | .client = clp, | |
4862 | .cb_program = NFS4_CALLBACK, | |
4863 | }; | |
4864 | struct nfs41_create_session_res res = { | |
4865 | .client = clp, | |
4866 | }; | |
4867 | struct rpc_message msg = { | |
4868 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4869 | .rpc_argp = &args, | |
4870 | .rpc_resp = &res, | |
4871 | }; | |
4872 | int status; | |
4873 | ||
4874 | nfs4_init_channel_attrs(&args); | |
0f91421e | 4875 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
fc931582 AA |
4876 | |
4877 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4878 | ||
8d35301d AA |
4879 | if (!status) |
4880 | /* Verify the session's negotiated channel_attrs values */ | |
4881 | status = nfs4_verify_channel_attrs(&args, session); | |
fc931582 AA |
4882 | if (!status) { |
4883 | /* Increment the clientid slot sequence id */ | |
4884 | clp->cl_seqid++; | |
4885 | } | |
4886 | ||
4887 | return status; | |
4888 | } | |
4889 | ||
4890 | /* | |
4891 | * Issues a CREATE_SESSION operation to the server. | |
4892 | * It is the responsibility of the caller to verify the session is | |
4893 | * expired before calling this routine. | |
4894 | */ | |
f26468fb | 4895 | int nfs4_proc_create_session(struct nfs_client *clp) |
fc931582 AA |
4896 | { |
4897 | int status; | |
4898 | unsigned *ptr; | |
fc931582 AA |
4899 | struct nfs4_session *session = clp->cl_session; |
4900 | ||
4901 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4902 | ||
4903 | status = _nfs4_proc_create_session(clp); | |
4904 | if (status) | |
4905 | goto out; | |
4906 | ||
f26468fb TM |
4907 | /* Init and reset the fore channel */ |
4908 | status = nfs4_init_slot_tables(session); | |
4909 | dprintk("slot table initialization returned %d\n", status); | |
4910 | if (status) | |
4911 | goto out; | |
4912 | status = nfs4_reset_slot_tables(session); | |
4913 | dprintk("slot table reset returned %d\n", status); | |
fc931582 AA |
4914 | if (status) |
4915 | goto out; | |
4916 | ||
4917 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4918 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4919 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
fc931582 AA |
4920 | out: |
4921 | dprintk("<-- %s\n", __func__); | |
4922 | return status; | |
4923 | } | |
4924 | ||
0f3e66c6 AA |
4925 | /* |
4926 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
4927 | * The caller must serialize access to this routine. | |
4928 | */ | |
4929 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
4930 | { | |
4931 | int status = 0; | |
4932 | struct rpc_message msg; | |
4933 | ||
4934 | dprintk("--> nfs4_proc_destroy_session\n"); | |
4935 | ||
4936 | /* session is still being setup */ | |
4937 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
4938 | return status; | |
4939 | ||
4940 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
4941 | msg.rpc_argp = session; | |
4942 | msg.rpc_resp = NULL; | |
4943 | msg.rpc_cred = NULL; | |
4944 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4945 | ||
4946 | if (status) | |
4947 | printk(KERN_WARNING | |
4948 | "Got error %d from the server on DESTROY_SESSION. " | |
4949 | "Session has been destroyed regardless...\n", status); | |
4950 | ||
4951 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
4952 | return status; | |
4953 | } | |
4954 | ||
fccba804 TM |
4955 | int nfs4_init_session(struct nfs_server *server) |
4956 | { | |
4957 | struct nfs_client *clp = server->nfs_client; | |
2449ea2e | 4958 | struct nfs4_session *session; |
68bf05ef | 4959 | unsigned int rsize, wsize; |
fccba804 TM |
4960 | int ret; |
4961 | ||
4962 | if (!nfs4_has_session(clp)) | |
4963 | return 0; | |
4964 | ||
1055d76d TM |
4965 | session = clp->cl_session; |
4966 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) | |
4967 | return 0; | |
4968 | ||
68bf05ef AA |
4969 | rsize = server->rsize; |
4970 | if (rsize == 0) | |
4971 | rsize = NFS_MAX_FILE_IO_SIZE; | |
4972 | wsize = server->wsize; | |
4973 | if (wsize == 0) | |
4974 | wsize = NFS_MAX_FILE_IO_SIZE; | |
4975 | ||
68bf05ef AA |
4976 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
4977 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; | |
2449ea2e | 4978 | |
fccba804 TM |
4979 | ret = nfs4_recover_expired_lease(server); |
4980 | if (!ret) | |
4981 | ret = nfs4_check_client_ready(clp); | |
4982 | return ret; | |
4983 | } | |
4984 | ||
fc01cea9 AA |
4985 | /* |
4986 | * Renew the cl_session lease. | |
4987 | */ | |
d5f8d3fe TM |
4988 | struct nfs4_sequence_data { |
4989 | struct nfs_client *clp; | |
4990 | struct nfs4_sequence_args args; | |
4991 | struct nfs4_sequence_res res; | |
4992 | }; | |
4993 | ||
dc96aef9 AB |
4994 | static void nfs41_sequence_release(void *data) |
4995 | { | |
d5f8d3fe TM |
4996 | struct nfs4_sequence_data *calldata = data; |
4997 | struct nfs_client *clp = calldata->clp; | |
dc96aef9 | 4998 | |
7135840f AB |
4999 | if (atomic_read(&clp->cl_count) > 1) |
5000 | nfs4_schedule_state_renewal(clp); | |
5001 | nfs_put_client(clp); | |
d5f8d3fe | 5002 | kfree(calldata); |
dc96aef9 AB |
5003 | } |
5004 | ||
aa5190d0 TM |
5005 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5006 | { | |
5007 | switch(task->tk_status) { | |
5008 | case -NFS4ERR_DELAY: | |
5009 | case -EKEYEXPIRED: | |
5010 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5011 | return -EAGAIN; | |
5012 | default: | |
5013 | nfs4_schedule_state_recovery(clp); | |
5014 | } | |
5015 | return 0; | |
5016 | } | |
5017 | ||
dc96aef9 | 5018 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) |
fc01cea9 | 5019 | { |
d5f8d3fe TM |
5020 | struct nfs4_sequence_data *calldata = data; |
5021 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 | 5022 | |
14516c3a TM |
5023 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) |
5024 | return; | |
fc01cea9 AA |
5025 | |
5026 | if (task->tk_status < 0) { | |
5027 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
7135840f AB |
5028 | if (atomic_read(&clp->cl_count) == 1) |
5029 | goto out; | |
fc01cea9 | 5030 | |
aa5190d0 TM |
5031 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { |
5032 | rpc_restart_call_prepare(task); | |
fc01cea9 AA |
5033 | return; |
5034 | } | |
5035 | } | |
fc01cea9 | 5036 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
7135840f | 5037 | out: |
fc01cea9 AA |
5038 | dprintk("<-- %s\n", __func__); |
5039 | } | |
5040 | ||
5041 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5042 | { | |
d5f8d3fe TM |
5043 | struct nfs4_sequence_data *calldata = data; |
5044 | struct nfs_client *clp = calldata->clp; | |
fc01cea9 AA |
5045 | struct nfs4_sequence_args *args; |
5046 | struct nfs4_sequence_res *res; | |
5047 | ||
fc01cea9 AA |
5048 | args = task->tk_msg.rpc_argp; |
5049 | res = task->tk_msg.rpc_resp; | |
5050 | ||
035168ab | 5051 | if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task)) |
fc01cea9 AA |
5052 | return; |
5053 | rpc_call_start(task); | |
5054 | } | |
5055 | ||
5056 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5057 | .rpc_call_done = nfs41_sequence_call_done, | |
5058 | .rpc_call_prepare = nfs41_sequence_prepare, | |
dc96aef9 | 5059 | .rpc_release = nfs41_sequence_release, |
fc01cea9 AA |
5060 | }; |
5061 | ||
71ac6da9 | 5062 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) |
fc01cea9 | 5063 | { |
d5f8d3fe | 5064 | struct nfs4_sequence_data *calldata; |
fc01cea9 AA |
5065 | struct rpc_message msg = { |
5066 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5067 | .rpc_cred = cred, | |
5068 | }; | |
71ac6da9 TM |
5069 | struct rpc_task_setup task_setup_data = { |
5070 | .rpc_client = clp->cl_rpcclient, | |
5071 | .rpc_message = &msg, | |
5072 | .callback_ops = &nfs41_sequence_ops, | |
5073 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, | |
5074 | }; | |
fc01cea9 | 5075 | |
7135840f | 5076 | if (!atomic_inc_not_zero(&clp->cl_count)) |
71ac6da9 | 5077 | return ERR_PTR(-EIO); |
d5f8d3fe TM |
5078 | calldata = kmalloc(sizeof(*calldata), GFP_NOFS); |
5079 | if (calldata == NULL) { | |
7135840f | 5080 | nfs_put_client(clp); |
71ac6da9 | 5081 | return ERR_PTR(-ENOMEM); |
fc01cea9 | 5082 | } |
d5f8d3fe TM |
5083 | calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5084 | msg.rpc_argp = &calldata->args; | |
5085 | msg.rpc_resp = &calldata->res; | |
5086 | calldata->clp = clp; | |
71ac6da9 | 5087 | task_setup_data.callback_data = calldata; |
fc01cea9 | 5088 | |
71ac6da9 TM |
5089 | return rpc_run_task(&task_setup_data); |
5090 | } | |
5091 | ||
5092 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5093 | { | |
5094 | struct rpc_task *task; | |
5095 | int ret = 0; | |
5096 | ||
5097 | task = _nfs41_proc_sequence(clp, cred); | |
5098 | if (IS_ERR(task)) | |
5099 | ret = PTR_ERR(task); | |
5100 | else | |
5101 | rpc_put_task(task); | |
5102 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5103 | return ret; | |
5104 | } | |
5105 | ||
5106 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5107 | { | |
5108 | struct rpc_task *task; | |
5109 | int ret; | |
5110 | ||
5111 | task = _nfs41_proc_sequence(clp, cred); | |
5112 | if (IS_ERR(task)) { | |
5113 | ret = PTR_ERR(task); | |
5114 | goto out; | |
5115 | } | |
5116 | ret = rpc_wait_for_completion_task(task); | |
5117 | if (!ret) | |
5118 | ret = task->tk_status; | |
5119 | rpc_put_task(task); | |
5120 | out: | |
5121 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5122 | return ret; | |
fc01cea9 AA |
5123 | } |
5124 | ||
fce5c838 RL |
5125 | struct nfs4_reclaim_complete_data { |
5126 | struct nfs_client *clp; | |
5127 | struct nfs41_reclaim_complete_args arg; | |
5128 | struct nfs41_reclaim_complete_res res; | |
5129 | }; | |
5130 | ||
5131 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5132 | { | |
5133 | struct nfs4_reclaim_complete_data *calldata = data; | |
5134 | ||
b257957e | 5135 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
035168ab TM |
5136 | if (nfs41_setup_sequence(calldata->clp->cl_session, |
5137 | &calldata->arg.seq_args, | |
fce5c838 RL |
5138 | &calldata->res.seq_res, 0, task)) |
5139 | return; | |
5140 | ||
5141 | rpc_call_start(task); | |
5142 | } | |
5143 | ||
aa5190d0 TM |
5144 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) |
5145 | { | |
5146 | switch(task->tk_status) { | |
5147 | case 0: | |
5148 | case -NFS4ERR_COMPLETE_ALREADY: | |
5149 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ | |
5150 | break; | |
5151 | case -NFS4ERR_DELAY: | |
5152 | case -EKEYEXPIRED: | |
5153 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5154 | return -EAGAIN; | |
5155 | default: | |
5156 | nfs4_schedule_state_recovery(clp); | |
5157 | } | |
5158 | return 0; | |
5159 | } | |
5160 | ||
fce5c838 RL |
5161 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) |
5162 | { | |
5163 | struct nfs4_reclaim_complete_data *calldata = data; | |
5164 | struct nfs_client *clp = calldata->clp; | |
5165 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5166 | ||
5167 | dprintk("--> %s\n", __func__); | |
14516c3a TM |
5168 | if (!nfs41_sequence_done(task, res)) |
5169 | return; | |
fce5c838 | 5170 | |
aa5190d0 TM |
5171 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { |
5172 | rpc_restart_call_prepare(task); | |
5173 | return; | |
5174 | } | |
fce5c838 RL |
5175 | dprintk("<-- %s\n", __func__); |
5176 | } | |
5177 | ||
5178 | static void nfs4_free_reclaim_complete_data(void *data) | |
5179 | { | |
5180 | struct nfs4_reclaim_complete_data *calldata = data; | |
5181 | ||
5182 | kfree(calldata); | |
5183 | } | |
5184 | ||
5185 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5186 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5187 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5188 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5189 | }; | |
5190 | ||
5191 | /* | |
5192 | * Issue a global reclaim complete. | |
5193 | */ | |
5194 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5195 | { | |
5196 | struct nfs4_reclaim_complete_data *calldata; | |
5197 | struct rpc_task *task; | |
5198 | struct rpc_message msg = { | |
5199 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5200 | }; | |
5201 | struct rpc_task_setup task_setup_data = { | |
5202 | .rpc_client = clp->cl_rpcclient, | |
5203 | .rpc_message = &msg, | |
5204 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5205 | .flags = RPC_TASK_ASYNC, | |
5206 | }; | |
5207 | int status = -ENOMEM; | |
5208 | ||
5209 | dprintk("--> %s\n", __func__); | |
8535b2be | 5210 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); |
fce5c838 RL |
5211 | if (calldata == NULL) |
5212 | goto out; | |
5213 | calldata->clp = clp; | |
5214 | calldata->arg.one_fs = 0; | |
5215 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
5216 | ||
5217 | msg.rpc_argp = &calldata->arg; | |
5218 | msg.rpc_resp = &calldata->res; | |
5219 | task_setup_data.callback_data = calldata; | |
5220 | task = rpc_run_task(&task_setup_data); | |
acf82b85 | 5221 | if (IS_ERR(task)) { |
fce5c838 | 5222 | status = PTR_ERR(task); |
acf82b85 DC |
5223 | goto out; |
5224 | } | |
fce5c838 | 5225 | rpc_put_task(task); |
acf82b85 | 5226 | return 0; |
fce5c838 RL |
5227 | out: |
5228 | dprintk("<-- %s status=%d\n", __func__, status); | |
5229 | return status; | |
5230 | } | |
557134a3 AA |
5231 | #endif /* CONFIG_NFS_V4_1 */ |
5232 | ||
591d71cb | 5233 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
7eff03ae | 5234 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 5235 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
5236 | .recover_open = nfs4_open_reclaim, |
5237 | .recover_lock = nfs4_lock_reclaim, | |
591d71cb | 5238 | .establish_clid = nfs4_init_clientid, |
90a16617 | 5239 | .get_clid_cred = nfs4_get_setclientid_cred, |
1da177e4 LT |
5240 | }; |
5241 | ||
591d71cb AA |
5242 | #if defined(CONFIG_NFS_V4_1) |
5243 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
5244 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
5245 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
5246 | .recover_open = nfs4_open_reclaim, | |
5247 | .recover_lock = nfs4_lock_reclaim, | |
4d643d1d | 5248 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5249 | .get_clid_cred = nfs4_get_exchange_id_cred, |
fce5c838 | 5250 | .reclaim_complete = nfs41_proc_reclaim_complete, |
591d71cb AA |
5251 | }; |
5252 | #endif /* CONFIG_NFS_V4_1 */ | |
5253 | ||
5254 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
5255 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
5256 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
5257 | .recover_open = nfs4_open_expired, | |
5258 | .recover_lock = nfs4_lock_expired, | |
5259 | .establish_clid = nfs4_init_clientid, | |
90a16617 | 5260 | .get_clid_cred = nfs4_get_setclientid_cred, |
591d71cb AA |
5261 | }; |
5262 | ||
5263 | #if defined(CONFIG_NFS_V4_1) | |
5264 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
7eff03ae | 5265 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 5266 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
5267 | .recover_open = nfs4_open_expired, |
5268 | .recover_lock = nfs4_lock_expired, | |
4d643d1d | 5269 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5270 | .get_clid_cred = nfs4_get_exchange_id_cred, |
1da177e4 | 5271 | }; |
591d71cb | 5272 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 | 5273 | |
29fba38b BH |
5274 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
5275 | .sched_state_renewal = nfs4_proc_async_renew, | |
a7b72103 | 5276 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
8e69514f | 5277 | .renew_lease = nfs4_proc_renew, |
29fba38b BH |
5278 | }; |
5279 | ||
5280 | #if defined(CONFIG_NFS_V4_1) | |
5281 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
5282 | .sched_state_renewal = nfs41_proc_async_sequence, | |
a7b72103 | 5283 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
8e69514f | 5284 | .renew_lease = nfs4_proc_sequence, |
29fba38b BH |
5285 | }; |
5286 | #endif | |
5287 | ||
97dc1359 TM |
5288 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { |
5289 | .minor_version = 0, | |
5290 | .call_sync = _nfs4_call_sync, | |
e047a10c | 5291 | .validate_stateid = nfs4_validate_delegation_stateid, |
c48f4f35 TM |
5292 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, |
5293 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, | |
5294 | .state_renewal_ops = &nfs40_state_renewal_ops, | |
97dc1359 TM |
5295 | }; |
5296 | ||
5297 | #if defined(CONFIG_NFS_V4_1) | |
5298 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { | |
5299 | .minor_version = 1, | |
5300 | .call_sync = _nfs4_call_sync_session, | |
e047a10c | 5301 | .validate_stateid = nfs41_validate_delegation_stateid, |
c48f4f35 TM |
5302 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, |
5303 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, | |
5304 | .state_renewal_ops = &nfs41_state_renewal_ops, | |
97dc1359 TM |
5305 | }; |
5306 | #endif | |
5307 | ||
97dc1359 TM |
5308 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { |
5309 | [0] = &nfs_v4_0_minor_ops, | |
5310 | #if defined(CONFIG_NFS_V4_1) | |
5311 | [1] = &nfs_v4_1_minor_ops, | |
5312 | #endif | |
5313 | }; | |
5314 | ||
92e1d5be | 5315 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
5316 | .permission = nfs_permission, |
5317 | .getattr = nfs_getattr, | |
5318 | .setattr = nfs_setattr, | |
5319 | .getxattr = nfs4_getxattr, | |
5320 | .setxattr = nfs4_setxattr, | |
5321 | .listxattr = nfs4_listxattr, | |
5322 | }; | |
5323 | ||
509de811 | 5324 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
5325 | .version = 4, /* protocol version */ |
5326 | .dentry_ops = &nfs4_dentry_operations, | |
5327 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 5328 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
5329 | .getroot = nfs4_proc_get_root, |
5330 | .getattr = nfs4_proc_getattr, | |
5331 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 5332 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
5333 | .lookup = nfs4_proc_lookup, |
5334 | .access = nfs4_proc_access, | |
5335 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
5336 | .create = nfs4_proc_create, |
5337 | .remove = nfs4_proc_remove, | |
5338 | .unlink_setup = nfs4_proc_unlink_setup, | |
5339 | .unlink_done = nfs4_proc_unlink_done, | |
5340 | .rename = nfs4_proc_rename, | |
5341 | .link = nfs4_proc_link, | |
5342 | .symlink = nfs4_proc_symlink, | |
5343 | .mkdir = nfs4_proc_mkdir, | |
5344 | .rmdir = nfs4_proc_remove, | |
5345 | .readdir = nfs4_proc_readdir, | |
5346 | .mknod = nfs4_proc_mknod, | |
5347 | .statfs = nfs4_proc_statfs, | |
5348 | .fsinfo = nfs4_proc_fsinfo, | |
5349 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 5350 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
5351 | .decode_dirent = nfs4_decode_dirent, |
5352 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 5353 | .read_done = nfs4_read_done, |
1da177e4 | 5354 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 5355 | .write_done = nfs4_write_done, |
1da177e4 | 5356 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 5357 | .commit_done = nfs4_commit_done, |
1da177e4 | 5358 | .lock = nfs4_proc_lock, |
e50a1c2e | 5359 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 5360 | .close_context = nfs4_close_context, |
2b484297 | 5361 | .open_context = nfs4_atomic_open, |
1da177e4 LT |
5362 | }; |
5363 | ||
5364 | /* | |
5365 | * Local variables: | |
5366 | * c-basic-offset: 8 | |
5367 | * End: | |
5368 | */ |