]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
39 | #include <linux/delay.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/string.h> | |
42 | #include <linux/ratelimit.h> | |
43 | #include <linux/printk.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/sunrpc/clnt.h> | |
46 | #include <linux/sunrpc/gss_api.h> | |
47 | #include <linux/nfs.h> | |
48 | #include <linux/nfs4.h> | |
49 | #include <linux/nfs_fs.h> | |
50 | #include <linux/nfs_page.h> | |
51 | #include <linux/nfs_mount.h> | |
52 | #include <linux/namei.h> | |
53 | #include <linux/mount.h> | |
54 | #include <linux/module.h> | |
55 | #include <linux/nfs_idmap.h> | |
56 | #include <linux/sunrpc/bc_xprt.h> | |
57 | #include <linux/xattr.h> | |
58 | #include <linux/utsname.h> | |
59 | #include <linux/freezer.h> | |
60 | ||
61 | #include "nfs4_fs.h" | |
62 | #include "delegation.h" | |
63 | #include "internal.h" | |
64 | #include "iostat.h" | |
65 | #include "callback.h" | |
66 | #include "pnfs.h" | |
67 | ||
68 | #define NFSDBG_FACILITY NFSDBG_PROC | |
69 | ||
70 | #define NFS4_POLL_RETRY_MIN (HZ/10) | |
71 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
72 | ||
73 | #define NFS4_MAX_LOOP_ON_RECOVER (10) | |
74 | ||
75 | static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE; | |
76 | ||
77 | struct nfs4_opendata; | |
78 | static int _nfs4_proc_open(struct nfs4_opendata *data); | |
79 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); | |
80 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); | |
81 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); | |
82 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); | |
83 | static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *); | |
84 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
85 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
86 | struct nfs_fattr *fattr, struct iattr *sattr, | |
87 | struct nfs4_state *state); | |
88 | #ifdef CONFIG_NFS_V4_1 | |
89 | static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *); | |
90 | static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *); | |
91 | #endif | |
92 | /* Prevent leaks of NFSv4 errors into userland */ | |
93 | static int nfs4_map_errors(int err) | |
94 | { | |
95 | if (err >= -1000) | |
96 | return err; | |
97 | switch (err) { | |
98 | case -NFS4ERR_RESOURCE: | |
99 | return -EREMOTEIO; | |
100 | case -NFS4ERR_WRONGSEC: | |
101 | return -EPERM; | |
102 | case -NFS4ERR_BADOWNER: | |
103 | case -NFS4ERR_BADNAME: | |
104 | return -EINVAL; | |
105 | default: | |
106 | dprintk("%s could not handle NFSv4 error %d\n", | |
107 | __func__, -err); | |
108 | break; | |
109 | } | |
110 | return -EIO; | |
111 | } | |
112 | ||
113 | /* | |
114 | * This is our standard bitmap for GETATTR requests. | |
115 | */ | |
116 | const u32 nfs4_fattr_bitmap[2] = { | |
117 | FATTR4_WORD0_TYPE | |
118 | | FATTR4_WORD0_CHANGE | |
119 | | FATTR4_WORD0_SIZE | |
120 | | FATTR4_WORD0_FSID | |
121 | | FATTR4_WORD0_FILEID, | |
122 | FATTR4_WORD1_MODE | |
123 | | FATTR4_WORD1_NUMLINKS | |
124 | | FATTR4_WORD1_OWNER | |
125 | | FATTR4_WORD1_OWNER_GROUP | |
126 | | FATTR4_WORD1_RAWDEV | |
127 | | FATTR4_WORD1_SPACE_USED | |
128 | | FATTR4_WORD1_TIME_ACCESS | |
129 | | FATTR4_WORD1_TIME_METADATA | |
130 | | FATTR4_WORD1_TIME_MODIFY | |
131 | }; | |
132 | ||
133 | const u32 nfs4_statfs_bitmap[2] = { | |
134 | FATTR4_WORD0_FILES_AVAIL | |
135 | | FATTR4_WORD0_FILES_FREE | |
136 | | FATTR4_WORD0_FILES_TOTAL, | |
137 | FATTR4_WORD1_SPACE_AVAIL | |
138 | | FATTR4_WORD1_SPACE_FREE | |
139 | | FATTR4_WORD1_SPACE_TOTAL | |
140 | }; | |
141 | ||
142 | const u32 nfs4_pathconf_bitmap[2] = { | |
143 | FATTR4_WORD0_MAXLINK | |
144 | | FATTR4_WORD0_MAXNAME, | |
145 | 0 | |
146 | }; | |
147 | ||
148 | const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE | |
149 | | FATTR4_WORD0_MAXREAD | |
150 | | FATTR4_WORD0_MAXWRITE | |
151 | | FATTR4_WORD0_LEASE_TIME, | |
152 | FATTR4_WORD1_TIME_DELTA | |
153 | | FATTR4_WORD1_FS_LAYOUT_TYPES, | |
154 | FATTR4_WORD2_LAYOUT_BLKSIZE | |
155 | }; | |
156 | ||
157 | const u32 nfs4_fs_locations_bitmap[2] = { | |
158 | FATTR4_WORD0_TYPE | |
159 | | FATTR4_WORD0_CHANGE | |
160 | | FATTR4_WORD0_SIZE | |
161 | | FATTR4_WORD0_FSID | |
162 | | FATTR4_WORD0_FILEID | |
163 | | FATTR4_WORD0_FS_LOCATIONS, | |
164 | FATTR4_WORD1_MODE | |
165 | | FATTR4_WORD1_NUMLINKS | |
166 | | FATTR4_WORD1_OWNER | |
167 | | FATTR4_WORD1_OWNER_GROUP | |
168 | | FATTR4_WORD1_RAWDEV | |
169 | | FATTR4_WORD1_SPACE_USED | |
170 | | FATTR4_WORD1_TIME_ACCESS | |
171 | | FATTR4_WORD1_TIME_METADATA | |
172 | | FATTR4_WORD1_TIME_MODIFY | |
173 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
174 | }; | |
175 | ||
176 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, | |
177 | struct nfs4_readdir_arg *readdir) | |
178 | { | |
179 | __be32 *start, *p; | |
180 | ||
181 | BUG_ON(readdir->count < 80); | |
182 | if (cookie > 2) { | |
183 | readdir->cookie = cookie; | |
184 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); | |
185 | return; | |
186 | } | |
187 | ||
188 | readdir->cookie = 0; | |
189 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
190 | if (cookie == 2) | |
191 | return; | |
192 | ||
193 | /* | |
194 | * NFSv4 servers do not return entries for '.' and '..' | |
195 | * Therefore, we fake these entries here. We let '.' | |
196 | * have cookie 0 and '..' have cookie 1. Note that | |
197 | * when talking to the server, we always send cookie 0 | |
198 | * instead of 1 or 2. | |
199 | */ | |
200 | start = p = kmap_atomic(*readdir->pages); | |
201 | ||
202 | if (cookie == 0) { | |
203 | *p++ = xdr_one; /* next */ | |
204 | *p++ = xdr_zero; /* cookie, first word */ | |
205 | *p++ = xdr_one; /* cookie, second word */ | |
206 | *p++ = xdr_one; /* entry len */ | |
207 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
208 | p++; | |
209 | *p++ = xdr_one; /* bitmap length */ | |
210 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
211 | *p++ = htonl(8); /* attribute buffer length */ | |
212 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); | |
213 | } | |
214 | ||
215 | *p++ = xdr_one; /* next */ | |
216 | *p++ = xdr_zero; /* cookie, first word */ | |
217 | *p++ = xdr_two; /* cookie, second word */ | |
218 | *p++ = xdr_two; /* entry len */ | |
219 | memcpy(p, "..\0\0", 4); /* entry */ | |
220 | p++; | |
221 | *p++ = xdr_one; /* bitmap length */ | |
222 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
223 | *p++ = htonl(8); /* attribute buffer length */ | |
224 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); | |
225 | ||
226 | readdir->pgbase = (char *)p - (char *)start; | |
227 | readdir->count -= readdir->pgbase; | |
228 | kunmap_atomic(start); | |
229 | } | |
230 | ||
231 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) | |
232 | { | |
233 | int res; | |
234 | ||
235 | might_sleep(); | |
236 | ||
237 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, | |
238 | nfs_wait_bit_killable, TASK_KILLABLE); | |
239 | return res; | |
240 | } | |
241 | ||
242 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
243 | { | |
244 | int res = 0; | |
245 | ||
246 | might_sleep(); | |
247 | ||
248 | if (*timeout <= 0) | |
249 | *timeout = NFS4_POLL_RETRY_MIN; | |
250 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
251 | *timeout = NFS4_POLL_RETRY_MAX; | |
252 | freezable_schedule_timeout_killable(*timeout); | |
253 | if (fatal_signal_pending(current)) | |
254 | res = -ERESTARTSYS; | |
255 | *timeout <<= 1; | |
256 | return res; | |
257 | } | |
258 | ||
259 | /* This is the error handling routine for processes that are allowed | |
260 | * to sleep. | |
261 | */ | |
262 | static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
263 | { | |
264 | struct nfs_client *clp = server->nfs_client; | |
265 | struct nfs4_state *state = exception->state; | |
266 | struct inode *inode = exception->inode; | |
267 | int ret = errorcode; | |
268 | ||
269 | exception->retry = 0; | |
270 | switch(errorcode) { | |
271 | case 0: | |
272 | return 0; | |
273 | case -NFS4ERR_OPENMODE: | |
274 | if (inode && nfs_have_delegation(inode, FMODE_READ)) { | |
275 | nfs_inode_return_delegation(inode); | |
276 | exception->retry = 1; | |
277 | return 0; | |
278 | } | |
279 | if (state == NULL) | |
280 | break; | |
281 | nfs4_schedule_stateid_recovery(server, state); | |
282 | goto wait_on_recovery; | |
283 | case -NFS4ERR_DELEG_REVOKED: | |
284 | case -NFS4ERR_ADMIN_REVOKED: | |
285 | case -NFS4ERR_BAD_STATEID: | |
286 | if (state == NULL) | |
287 | break; | |
288 | nfs_remove_bad_delegation(state->inode); | |
289 | nfs4_schedule_stateid_recovery(server, state); | |
290 | goto wait_on_recovery; | |
291 | case -NFS4ERR_EXPIRED: | |
292 | if (state != NULL) | |
293 | nfs4_schedule_stateid_recovery(server, state); | |
294 | case -NFS4ERR_STALE_STATEID: | |
295 | case -NFS4ERR_STALE_CLIENTID: | |
296 | nfs4_schedule_lease_recovery(clp); | |
297 | goto wait_on_recovery; | |
298 | #if defined(CONFIG_NFS_V4_1) | |
299 | case -NFS4ERR_BADSESSION: | |
300 | case -NFS4ERR_BADSLOT: | |
301 | case -NFS4ERR_BAD_HIGH_SLOT: | |
302 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
303 | case -NFS4ERR_DEADSESSION: | |
304 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
305 | case -NFS4ERR_SEQ_MISORDERED: | |
306 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
307 | errorcode); | |
308 | nfs4_schedule_session_recovery(clp->cl_session); | |
309 | exception->retry = 1; | |
310 | break; | |
311 | #endif /* defined(CONFIG_NFS_V4_1) */ | |
312 | case -NFS4ERR_FILE_OPEN: | |
313 | if (exception->timeout > HZ) { | |
314 | /* We have retried a decent amount, time to | |
315 | * fail | |
316 | */ | |
317 | ret = -EBUSY; | |
318 | break; | |
319 | } | |
320 | case -NFS4ERR_GRACE: | |
321 | case -NFS4ERR_DELAY: | |
322 | case -EKEYEXPIRED: | |
323 | ret = nfs4_delay(server->client, &exception->timeout); | |
324 | if (ret != 0) | |
325 | break; | |
326 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
327 | case -NFS4ERR_OLD_STATEID: | |
328 | exception->retry = 1; | |
329 | break; | |
330 | case -NFS4ERR_BADOWNER: | |
331 | /* The following works around a Linux server bug! */ | |
332 | case -NFS4ERR_BADNAME: | |
333 | if (server->caps & NFS_CAP_UIDGID_NOMAP) { | |
334 | server->caps &= ~NFS_CAP_UIDGID_NOMAP; | |
335 | exception->retry = 1; | |
336 | printk(KERN_WARNING "NFS: v4 server %s " | |
337 | "does not accept raw " | |
338 | "uid/gids. " | |
339 | "Reenabling the idmapper.\n", | |
340 | server->nfs_client->cl_hostname); | |
341 | } | |
342 | } | |
343 | /* We failed to handle the error */ | |
344 | return nfs4_map_errors(ret); | |
345 | wait_on_recovery: | |
346 | ret = nfs4_wait_clnt_recover(clp); | |
347 | if (ret == 0) | |
348 | exception->retry = 1; | |
349 | return ret; | |
350 | } | |
351 | ||
352 | ||
353 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) | |
354 | { | |
355 | spin_lock(&clp->cl_lock); | |
356 | if (time_before(clp->cl_last_renewal,timestamp)) | |
357 | clp->cl_last_renewal = timestamp; | |
358 | spin_unlock(&clp->cl_lock); | |
359 | } | |
360 | ||
361 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) | |
362 | { | |
363 | do_renew_lease(server->nfs_client, timestamp); | |
364 | } | |
365 | ||
366 | #if defined(CONFIG_NFS_V4_1) | |
367 | ||
368 | /* | |
369 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
370 | * | |
371 | * freeing a slot is trivially done by clearing its respective bit | |
372 | * in the bitmap. | |
373 | * If the freed slotid equals highest_used_slotid we want to update it | |
374 | * so that the server would be able to size down the slot table if needed, | |
375 | * otherwise we know that the highest_used_slotid is still in use. | |
376 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
377 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
378 | * highest slotid in use. | |
379 | * If none found, highest_used_slotid is set to NFS4_NO_SLOT. | |
380 | * | |
381 | * Must be called while holding tbl->slot_tbl_lock | |
382 | */ | |
383 | static void | |
384 | nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid) | |
385 | { | |
386 | BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE); | |
387 | /* clear used bit in bitmap */ | |
388 | __clear_bit(slotid, tbl->used_slots); | |
389 | ||
390 | /* update highest_used_slotid when it is freed */ | |
391 | if (slotid == tbl->highest_used_slotid) { | |
392 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
393 | if (slotid < tbl->max_slots) | |
394 | tbl->highest_used_slotid = slotid; | |
395 | else | |
396 | tbl->highest_used_slotid = NFS4_NO_SLOT; | |
397 | } | |
398 | dprintk("%s: slotid %u highest_used_slotid %d\n", __func__, | |
399 | slotid, tbl->highest_used_slotid); | |
400 | } | |
401 | ||
402 | bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy) | |
403 | { | |
404 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
405 | return true; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Signal state manager thread if session fore channel is drained | |
410 | */ | |
411 | static void nfs4_check_drain_fc_complete(struct nfs4_session *ses) | |
412 | { | |
413 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { | |
414 | rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq, | |
415 | nfs4_set_task_privileged, NULL); | |
416 | return; | |
417 | } | |
418 | ||
419 | if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT) | |
420 | return; | |
421 | ||
422 | dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__); | |
423 | complete(&ses->fc_slot_table.complete); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Signal state manager thread if session back channel is drained | |
428 | */ | |
429 | void nfs4_check_drain_bc_complete(struct nfs4_session *ses) | |
430 | { | |
431 | if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) || | |
432 | ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT) | |
433 | return; | |
434 | dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__); | |
435 | complete(&ses->bc_slot_table.complete); | |
436 | } | |
437 | ||
438 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) | |
439 | { | |
440 | struct nfs4_slot_table *tbl; | |
441 | ||
442 | tbl = &res->sr_session->fc_slot_table; | |
443 | if (!res->sr_slot) { | |
444 | /* just wake up the next guy waiting since | |
445 | * we may have not consumed a slot after all */ | |
446 | dprintk("%s: No slot\n", __func__); | |
447 | return; | |
448 | } | |
449 | ||
450 | spin_lock(&tbl->slot_tbl_lock); | |
451 | nfs4_free_slot(tbl, res->sr_slot - tbl->slots); | |
452 | nfs4_check_drain_fc_complete(res->sr_session); | |
453 | spin_unlock(&tbl->slot_tbl_lock); | |
454 | res->sr_slot = NULL; | |
455 | } | |
456 | ||
457 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) | |
458 | { | |
459 | unsigned long timestamp; | |
460 | struct nfs_client *clp; | |
461 | ||
462 | /* | |
463 | * sr_status remains 1 if an RPC level error occurred. The server | |
464 | * may or may not have processed the sequence operation.. | |
465 | * Proceed as if the server received and processed the sequence | |
466 | * operation. | |
467 | */ | |
468 | if (res->sr_status == 1) | |
469 | res->sr_status = NFS_OK; | |
470 | ||
471 | /* don't increment the sequence number if the task wasn't sent */ | |
472 | if (!RPC_WAS_SENT(task)) | |
473 | goto out; | |
474 | ||
475 | /* Check the SEQUENCE operation status */ | |
476 | switch (res->sr_status) { | |
477 | case 0: | |
478 | /* Update the slot's sequence and clientid lease timer */ | |
479 | ++res->sr_slot->seq_nr; | |
480 | timestamp = res->sr_renewal_time; | |
481 | clp = res->sr_session->clp; | |
482 | do_renew_lease(clp, timestamp); | |
483 | /* Check sequence flags */ | |
484 | if (res->sr_status_flags != 0) | |
485 | nfs4_schedule_lease_recovery(clp); | |
486 | break; | |
487 | case -NFS4ERR_DELAY: | |
488 | /* The server detected a resend of the RPC call and | |
489 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 | |
490 | * of RFC5661. | |
491 | */ | |
492 | dprintk("%s: slot=%td seq=%d: Operation in progress\n", | |
493 | __func__, | |
494 | res->sr_slot - res->sr_session->fc_slot_table.slots, | |
495 | res->sr_slot->seq_nr); | |
496 | goto out_retry; | |
497 | default: | |
498 | /* Just update the slot sequence no. */ | |
499 | ++res->sr_slot->seq_nr; | |
500 | } | |
501 | out: | |
502 | /* The session may be reset by one of the error handlers. */ | |
503 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
504 | nfs41_sequence_free_slot(res); | |
505 | return 1; | |
506 | out_retry: | |
507 | if (!rpc_restart_call(task)) | |
508 | goto out; | |
509 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static int nfs4_sequence_done(struct rpc_task *task, | |
514 | struct nfs4_sequence_res *res) | |
515 | { | |
516 | if (res->sr_session == NULL) | |
517 | return 1; | |
518 | return nfs41_sequence_done(task, res); | |
519 | } | |
520 | ||
521 | /* | |
522 | * nfs4_find_slot - efficiently look for a free slot | |
523 | * | |
524 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
525 | * If found, we mark the slot as used, update the highest_used_slotid, | |
526 | * and respectively set up the sequence operation args. | |
527 | * The slot number is returned if found, or NFS4_NO_SLOT otherwise. | |
528 | * | |
529 | * Note: must be called with under the slot_tbl_lock. | |
530 | */ | |
531 | static u32 | |
532 | nfs4_find_slot(struct nfs4_slot_table *tbl) | |
533 | { | |
534 | u32 slotid; | |
535 | u32 ret_id = NFS4_NO_SLOT; | |
536 | ||
537 | dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n", | |
538 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
539 | tbl->max_slots); | |
540 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
541 | if (slotid >= tbl->max_slots) | |
542 | goto out; | |
543 | __set_bit(slotid, tbl->used_slots); | |
544 | if (slotid > tbl->highest_used_slotid || | |
545 | tbl->highest_used_slotid == NFS4_NO_SLOT) | |
546 | tbl->highest_used_slotid = slotid; | |
547 | ret_id = slotid; | |
548 | out: | |
549 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
550 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
551 | return ret_id; | |
552 | } | |
553 | ||
554 | static void nfs41_init_sequence(struct nfs4_sequence_args *args, | |
555 | struct nfs4_sequence_res *res, int cache_reply) | |
556 | { | |
557 | args->sa_session = NULL; | |
558 | args->sa_cache_this = 0; | |
559 | if (cache_reply) | |
560 | args->sa_cache_this = 1; | |
561 | res->sr_session = NULL; | |
562 | res->sr_slot = NULL; | |
563 | } | |
564 | ||
565 | int nfs41_setup_sequence(struct nfs4_session *session, | |
566 | struct nfs4_sequence_args *args, | |
567 | struct nfs4_sequence_res *res, | |
568 | struct rpc_task *task) | |
569 | { | |
570 | struct nfs4_slot *slot; | |
571 | struct nfs4_slot_table *tbl; | |
572 | u32 slotid; | |
573 | ||
574 | dprintk("--> %s\n", __func__); | |
575 | /* slot already allocated? */ | |
576 | if (res->sr_slot != NULL) | |
577 | return 0; | |
578 | ||
579 | tbl = &session->fc_slot_table; | |
580 | ||
581 | spin_lock(&tbl->slot_tbl_lock); | |
582 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && | |
583 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
584 | /* The state manager will wait until the slot table is empty */ | |
585 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
586 | spin_unlock(&tbl->slot_tbl_lock); | |
587 | dprintk("%s session is draining\n", __func__); | |
588 | return -EAGAIN; | |
589 | } | |
590 | ||
591 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && | |
592 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
593 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
594 | spin_unlock(&tbl->slot_tbl_lock); | |
595 | dprintk("%s enforce FIFO order\n", __func__); | |
596 | return -EAGAIN; | |
597 | } | |
598 | ||
599 | slotid = nfs4_find_slot(tbl); | |
600 | if (slotid == NFS4_NO_SLOT) { | |
601 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
602 | spin_unlock(&tbl->slot_tbl_lock); | |
603 | dprintk("<-- %s: no free slots\n", __func__); | |
604 | return -EAGAIN; | |
605 | } | |
606 | spin_unlock(&tbl->slot_tbl_lock); | |
607 | ||
608 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); | |
609 | slot = tbl->slots + slotid; | |
610 | args->sa_session = session; | |
611 | args->sa_slotid = slotid; | |
612 | ||
613 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
614 | ||
615 | res->sr_session = session; | |
616 | res->sr_slot = slot; | |
617 | res->sr_renewal_time = jiffies; | |
618 | res->sr_status_flags = 0; | |
619 | /* | |
620 | * sr_status is only set in decode_sequence, and so will remain | |
621 | * set to 1 if an rpc level failure occurs. | |
622 | */ | |
623 | res->sr_status = 1; | |
624 | return 0; | |
625 | } | |
626 | EXPORT_SYMBOL_GPL(nfs41_setup_sequence); | |
627 | ||
628 | int nfs4_setup_sequence(const struct nfs_server *server, | |
629 | struct nfs4_sequence_args *args, | |
630 | struct nfs4_sequence_res *res, | |
631 | struct rpc_task *task) | |
632 | { | |
633 | struct nfs4_session *session = nfs4_get_session(server); | |
634 | int ret = 0; | |
635 | ||
636 | if (session == NULL) | |
637 | goto out; | |
638 | ||
639 | dprintk("--> %s clp %p session %p sr_slot %td\n", | |
640 | __func__, session->clp, session, res->sr_slot ? | |
641 | res->sr_slot - session->fc_slot_table.slots : -1); | |
642 | ||
643 | ret = nfs41_setup_sequence(session, args, res, task); | |
644 | out: | |
645 | dprintk("<-- %s status=%d\n", __func__, ret); | |
646 | return ret; | |
647 | } | |
648 | ||
649 | struct nfs41_call_sync_data { | |
650 | const struct nfs_server *seq_server; | |
651 | struct nfs4_sequence_args *seq_args; | |
652 | struct nfs4_sequence_res *seq_res; | |
653 | }; | |
654 | ||
655 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
656 | { | |
657 | struct nfs41_call_sync_data *data = calldata; | |
658 | ||
659 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); | |
660 | ||
661 | if (nfs4_setup_sequence(data->seq_server, data->seq_args, | |
662 | data->seq_res, task)) | |
663 | return; | |
664 | rpc_call_start(task); | |
665 | } | |
666 | ||
667 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) | |
668 | { | |
669 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
670 | nfs41_call_sync_prepare(task, calldata); | |
671 | } | |
672 | ||
673 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) | |
674 | { | |
675 | struct nfs41_call_sync_data *data = calldata; | |
676 | ||
677 | nfs41_sequence_done(task, data->seq_res); | |
678 | } | |
679 | ||
680 | static const struct rpc_call_ops nfs41_call_sync_ops = { | |
681 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
682 | .rpc_call_done = nfs41_call_sync_done, | |
683 | }; | |
684 | ||
685 | static const struct rpc_call_ops nfs41_call_priv_sync_ops = { | |
686 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, | |
687 | .rpc_call_done = nfs41_call_sync_done, | |
688 | }; | |
689 | ||
690 | static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, | |
691 | struct nfs_server *server, | |
692 | struct rpc_message *msg, | |
693 | struct nfs4_sequence_args *args, | |
694 | struct nfs4_sequence_res *res, | |
695 | int privileged) | |
696 | { | |
697 | int ret; | |
698 | struct rpc_task *task; | |
699 | struct nfs41_call_sync_data data = { | |
700 | .seq_server = server, | |
701 | .seq_args = args, | |
702 | .seq_res = res, | |
703 | }; | |
704 | struct rpc_task_setup task_setup = { | |
705 | .rpc_client = clnt, | |
706 | .rpc_message = msg, | |
707 | .callback_ops = &nfs41_call_sync_ops, | |
708 | .callback_data = &data | |
709 | }; | |
710 | ||
711 | if (privileged) | |
712 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; | |
713 | task = rpc_run_task(&task_setup); | |
714 | if (IS_ERR(task)) | |
715 | ret = PTR_ERR(task); | |
716 | else { | |
717 | ret = task->tk_status; | |
718 | rpc_put_task(task); | |
719 | } | |
720 | return ret; | |
721 | } | |
722 | ||
723 | int _nfs4_call_sync_session(struct rpc_clnt *clnt, | |
724 | struct nfs_server *server, | |
725 | struct rpc_message *msg, | |
726 | struct nfs4_sequence_args *args, | |
727 | struct nfs4_sequence_res *res, | |
728 | int cache_reply) | |
729 | { | |
730 | nfs41_init_sequence(args, res, cache_reply); | |
731 | return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0); | |
732 | } | |
733 | ||
734 | #else | |
735 | static inline | |
736 | void nfs41_init_sequence(struct nfs4_sequence_args *args, | |
737 | struct nfs4_sequence_res *res, int cache_reply) | |
738 | { | |
739 | } | |
740 | ||
741 | static int nfs4_sequence_done(struct rpc_task *task, | |
742 | struct nfs4_sequence_res *res) | |
743 | { | |
744 | return 1; | |
745 | } | |
746 | #endif /* CONFIG_NFS_V4_1 */ | |
747 | ||
748 | int _nfs4_call_sync(struct rpc_clnt *clnt, | |
749 | struct nfs_server *server, | |
750 | struct rpc_message *msg, | |
751 | struct nfs4_sequence_args *args, | |
752 | struct nfs4_sequence_res *res, | |
753 | int cache_reply) | |
754 | { | |
755 | nfs41_init_sequence(args, res, cache_reply); | |
756 | return rpc_call_sync(clnt, msg, 0); | |
757 | } | |
758 | ||
759 | static inline | |
760 | int nfs4_call_sync(struct rpc_clnt *clnt, | |
761 | struct nfs_server *server, | |
762 | struct rpc_message *msg, | |
763 | struct nfs4_sequence_args *args, | |
764 | struct nfs4_sequence_res *res, | |
765 | int cache_reply) | |
766 | { | |
767 | return server->nfs_client->cl_mvops->call_sync(clnt, server, msg, | |
768 | args, res, cache_reply); | |
769 | } | |
770 | ||
771 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) | |
772 | { | |
773 | struct nfs_inode *nfsi = NFS_I(dir); | |
774 | ||
775 | spin_lock(&dir->i_lock); | |
776 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
777 | if (!cinfo->atomic || cinfo->before != dir->i_version) | |
778 | nfs_force_lookup_revalidate(dir); | |
779 | dir->i_version = cinfo->after; | |
780 | spin_unlock(&dir->i_lock); | |
781 | } | |
782 | ||
783 | struct nfs4_opendata { | |
784 | struct kref kref; | |
785 | struct nfs_openargs o_arg; | |
786 | struct nfs_openres o_res; | |
787 | struct nfs_open_confirmargs c_arg; | |
788 | struct nfs_open_confirmres c_res; | |
789 | struct nfs4_string owner_name; | |
790 | struct nfs4_string group_name; | |
791 | struct nfs_fattr f_attr; | |
792 | struct dentry *dir; | |
793 | struct dentry *dentry; | |
794 | struct nfs4_state_owner *owner; | |
795 | struct nfs4_state *state; | |
796 | struct iattr attrs; | |
797 | unsigned long timestamp; | |
798 | unsigned int rpc_done : 1; | |
799 | int rpc_status; | |
800 | int cancelled; | |
801 | }; | |
802 | ||
803 | ||
804 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
805 | { | |
806 | p->o_res.f_attr = &p->f_attr; | |
807 | p->o_res.seqid = p->o_arg.seqid; | |
808 | p->c_res.seqid = p->c_arg.seqid; | |
809 | p->o_res.server = p->o_arg.server; | |
810 | nfs_fattr_init(&p->f_attr); | |
811 | nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); | |
812 | } | |
813 | ||
814 | static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, | |
815 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, | |
816 | const struct iattr *attrs, | |
817 | gfp_t gfp_mask) | |
818 | { | |
819 | struct dentry *parent = dget_parent(dentry); | |
820 | struct inode *dir = parent->d_inode; | |
821 | struct nfs_server *server = NFS_SERVER(dir); | |
822 | struct nfs4_opendata *p; | |
823 | ||
824 | p = kzalloc(sizeof(*p), gfp_mask); | |
825 | if (p == NULL) | |
826 | goto err; | |
827 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); | |
828 | if (p->o_arg.seqid == NULL) | |
829 | goto err_free; | |
830 | nfs_sb_active(dentry->d_sb); | |
831 | p->dentry = dget(dentry); | |
832 | p->dir = parent; | |
833 | p->owner = sp; | |
834 | atomic_inc(&sp->so_count); | |
835 | p->o_arg.fh = NFS_FH(dir); | |
836 | p->o_arg.open_flags = flags; | |
837 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
838 | p->o_arg.clientid = server->nfs_client->cl_clientid; | |
839 | p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); | |
840 | p->o_arg.id.uniquifier = sp->so_seqid.owner_id; | |
841 | p->o_arg.name = &dentry->d_name; | |
842 | p->o_arg.server = server; | |
843 | p->o_arg.bitmask = server->attr_bitmask; | |
844 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
845 | if (attrs != NULL && attrs->ia_valid != 0) { | |
846 | __be32 verf[2]; | |
847 | ||
848 | p->o_arg.u.attrs = &p->attrs; | |
849 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
850 | ||
851 | verf[0] = jiffies; | |
852 | verf[1] = current->pid; | |
853 | memcpy(p->o_arg.u.verifier.data, verf, | |
854 | sizeof(p->o_arg.u.verifier.data)); | |
855 | } | |
856 | p->c_arg.fh = &p->o_res.fh; | |
857 | p->c_arg.stateid = &p->o_res.stateid; | |
858 | p->c_arg.seqid = p->o_arg.seqid; | |
859 | nfs4_init_opendata_res(p); | |
860 | kref_init(&p->kref); | |
861 | return p; | |
862 | err_free: | |
863 | kfree(p); | |
864 | err: | |
865 | dput(parent); | |
866 | return NULL; | |
867 | } | |
868 | ||
869 | static void nfs4_opendata_free(struct kref *kref) | |
870 | { | |
871 | struct nfs4_opendata *p = container_of(kref, | |
872 | struct nfs4_opendata, kref); | |
873 | struct super_block *sb = p->dentry->d_sb; | |
874 | ||
875 | nfs_free_seqid(p->o_arg.seqid); | |
876 | if (p->state != NULL) | |
877 | nfs4_put_open_state(p->state); | |
878 | nfs4_put_state_owner(p->owner); | |
879 | dput(p->dir); | |
880 | dput(p->dentry); | |
881 | nfs_sb_deactive(sb); | |
882 | nfs_fattr_free_names(&p->f_attr); | |
883 | kfree(p); | |
884 | } | |
885 | ||
886 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
887 | { | |
888 | if (p != NULL) | |
889 | kref_put(&p->kref, nfs4_opendata_free); | |
890 | } | |
891 | ||
892 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) | |
893 | { | |
894 | int ret; | |
895 | ||
896 | ret = rpc_wait_for_completion_task(task); | |
897 | return ret; | |
898 | } | |
899 | ||
900 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) | |
901 | { | |
902 | int ret = 0; | |
903 | ||
904 | if (open_mode & (O_EXCL|O_TRUNC)) | |
905 | goto out; | |
906 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
907 | case FMODE_READ: | |
908 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 | |
909 | && state->n_rdonly != 0; | |
910 | break; | |
911 | case FMODE_WRITE: | |
912 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 | |
913 | && state->n_wronly != 0; | |
914 | break; | |
915 | case FMODE_READ|FMODE_WRITE: | |
916 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 | |
917 | && state->n_rdwr != 0; | |
918 | } | |
919 | out: | |
920 | return ret; | |
921 | } | |
922 | ||
923 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) | |
924 | { | |
925 | if (delegation == NULL) | |
926 | return 0; | |
927 | if ((delegation->type & fmode) != fmode) | |
928 | return 0; | |
929 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) | |
930 | return 0; | |
931 | nfs_mark_delegation_referenced(delegation); | |
932 | return 1; | |
933 | } | |
934 | ||
935 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) | |
936 | { | |
937 | switch (fmode) { | |
938 | case FMODE_WRITE: | |
939 | state->n_wronly++; | |
940 | break; | |
941 | case FMODE_READ: | |
942 | state->n_rdonly++; | |
943 | break; | |
944 | case FMODE_READ|FMODE_WRITE: | |
945 | state->n_rdwr++; | |
946 | } | |
947 | nfs4_state_set_mode_locked(state, state->state | fmode); | |
948 | } | |
949 | ||
950 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
951 | { | |
952 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
953 | nfs4_stateid_copy(&state->stateid, stateid); | |
954 | nfs4_stateid_copy(&state->open_stateid, stateid); | |
955 | switch (fmode) { | |
956 | case FMODE_READ: | |
957 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
958 | break; | |
959 | case FMODE_WRITE: | |
960 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
961 | break; | |
962 | case FMODE_READ|FMODE_WRITE: | |
963 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
964 | } | |
965 | } | |
966 | ||
967 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
968 | { | |
969 | write_seqlock(&state->seqlock); | |
970 | nfs_set_open_stateid_locked(state, stateid, fmode); | |
971 | write_sequnlock(&state->seqlock); | |
972 | } | |
973 | ||
974 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) | |
975 | { | |
976 | /* | |
977 | * Protect the call to nfs4_state_set_mode_locked and | |
978 | * serialise the stateid update | |
979 | */ | |
980 | write_seqlock(&state->seqlock); | |
981 | if (deleg_stateid != NULL) { | |
982 | nfs4_stateid_copy(&state->stateid, deleg_stateid); | |
983 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
984 | } | |
985 | if (open_stateid != NULL) | |
986 | nfs_set_open_stateid_locked(state, open_stateid, fmode); | |
987 | write_sequnlock(&state->seqlock); | |
988 | spin_lock(&state->owner->so_lock); | |
989 | update_open_stateflags(state, fmode); | |
990 | spin_unlock(&state->owner->so_lock); | |
991 | } | |
992 | ||
993 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) | |
994 | { | |
995 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
996 | struct nfs_delegation *deleg_cur; | |
997 | int ret = 0; | |
998 | ||
999 | fmode &= (FMODE_READ|FMODE_WRITE); | |
1000 | ||
1001 | rcu_read_lock(); | |
1002 | deleg_cur = rcu_dereference(nfsi->delegation); | |
1003 | if (deleg_cur == NULL) | |
1004 | goto no_delegation; | |
1005 | ||
1006 | spin_lock(&deleg_cur->lock); | |
1007 | if (nfsi->delegation != deleg_cur || | |
1008 | (deleg_cur->type & fmode) != fmode) | |
1009 | goto no_delegation_unlock; | |
1010 | ||
1011 | if (delegation == NULL) | |
1012 | delegation = &deleg_cur->stateid; | |
1013 | else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) | |
1014 | goto no_delegation_unlock; | |
1015 | ||
1016 | nfs_mark_delegation_referenced(deleg_cur); | |
1017 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); | |
1018 | ret = 1; | |
1019 | no_delegation_unlock: | |
1020 | spin_unlock(&deleg_cur->lock); | |
1021 | no_delegation: | |
1022 | rcu_read_unlock(); | |
1023 | ||
1024 | if (!ret && open_stateid != NULL) { | |
1025 | __update_open_stateid(state, open_stateid, NULL, fmode); | |
1026 | ret = 1; | |
1027 | } | |
1028 | ||
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | ||
1033 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) | |
1034 | { | |
1035 | struct nfs_delegation *delegation; | |
1036 | ||
1037 | rcu_read_lock(); | |
1038 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1039 | if (delegation == NULL || (delegation->type & fmode) == fmode) { | |
1040 | rcu_read_unlock(); | |
1041 | return; | |
1042 | } | |
1043 | rcu_read_unlock(); | |
1044 | nfs_inode_return_delegation(inode); | |
1045 | } | |
1046 | ||
1047 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) | |
1048 | { | |
1049 | struct nfs4_state *state = opendata->state; | |
1050 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1051 | struct nfs_delegation *delegation; | |
1052 | int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC); | |
1053 | fmode_t fmode = opendata->o_arg.fmode; | |
1054 | nfs4_stateid stateid; | |
1055 | int ret = -EAGAIN; | |
1056 | ||
1057 | for (;;) { | |
1058 | if (can_open_cached(state, fmode, open_mode)) { | |
1059 | spin_lock(&state->owner->so_lock); | |
1060 | if (can_open_cached(state, fmode, open_mode)) { | |
1061 | update_open_stateflags(state, fmode); | |
1062 | spin_unlock(&state->owner->so_lock); | |
1063 | goto out_return_state; | |
1064 | } | |
1065 | spin_unlock(&state->owner->so_lock); | |
1066 | } | |
1067 | rcu_read_lock(); | |
1068 | delegation = rcu_dereference(nfsi->delegation); | |
1069 | if (!can_open_delegated(delegation, fmode)) { | |
1070 | rcu_read_unlock(); | |
1071 | break; | |
1072 | } | |
1073 | /* Save the delegation */ | |
1074 | nfs4_stateid_copy(&stateid, &delegation->stateid); | |
1075 | rcu_read_unlock(); | |
1076 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); | |
1077 | if (ret != 0) | |
1078 | goto out; | |
1079 | ret = -EAGAIN; | |
1080 | ||
1081 | /* Try to update the stateid using the delegation */ | |
1082 | if (update_open_stateid(state, NULL, &stateid, fmode)) | |
1083 | goto out_return_state; | |
1084 | } | |
1085 | out: | |
1086 | return ERR_PTR(ret); | |
1087 | out_return_state: | |
1088 | atomic_inc(&state->count); | |
1089 | return state; | |
1090 | } | |
1091 | ||
1092 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) | |
1093 | { | |
1094 | struct inode *inode; | |
1095 | struct nfs4_state *state = NULL; | |
1096 | struct nfs_delegation *delegation; | |
1097 | int ret; | |
1098 | ||
1099 | if (!data->rpc_done) { | |
1100 | state = nfs4_try_open_cached(data); | |
1101 | goto out; | |
1102 | } | |
1103 | ||
1104 | ret = -EAGAIN; | |
1105 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
1106 | goto err; | |
1107 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
1108 | ret = PTR_ERR(inode); | |
1109 | if (IS_ERR(inode)) | |
1110 | goto err; | |
1111 | ret = -ENOMEM; | |
1112 | state = nfs4_get_open_state(inode, data->owner); | |
1113 | if (state == NULL) | |
1114 | goto err_put_inode; | |
1115 | if (data->o_res.delegation_type != 0) { | |
1116 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1117 | int delegation_flags = 0; | |
1118 | ||
1119 | rcu_read_lock(); | |
1120 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1121 | if (delegation) | |
1122 | delegation_flags = delegation->flags; | |
1123 | rcu_read_unlock(); | |
1124 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { | |
1125 | pr_err_ratelimited("NFS: Broken NFSv4 server %s is " | |
1126 | "returning a delegation for " | |
1127 | "OPEN(CLAIM_DELEGATE_CUR)\n", | |
1128 | clp->cl_hostname); | |
1129 | } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) | |
1130 | nfs_inode_set_delegation(state->inode, | |
1131 | data->owner->so_cred, | |
1132 | &data->o_res); | |
1133 | else | |
1134 | nfs_inode_reclaim_delegation(state->inode, | |
1135 | data->owner->so_cred, | |
1136 | &data->o_res); | |
1137 | } | |
1138 | ||
1139 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
1140 | data->o_arg.fmode); | |
1141 | iput(inode); | |
1142 | out: | |
1143 | return state; | |
1144 | err_put_inode: | |
1145 | iput(inode); | |
1146 | err: | |
1147 | return ERR_PTR(ret); | |
1148 | } | |
1149 | ||
1150 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) | |
1151 | { | |
1152 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1153 | struct nfs_open_context *ctx; | |
1154 | ||
1155 | spin_lock(&state->inode->i_lock); | |
1156 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1157 | if (ctx->state != state) | |
1158 | continue; | |
1159 | get_nfs_open_context(ctx); | |
1160 | spin_unlock(&state->inode->i_lock); | |
1161 | return ctx; | |
1162 | } | |
1163 | spin_unlock(&state->inode->i_lock); | |
1164 | return ERR_PTR(-ENOENT); | |
1165 | } | |
1166 | ||
1167 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1168 | { | |
1169 | struct nfs4_opendata *opendata; | |
1170 | ||
1171 | opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS); | |
1172 | if (opendata == NULL) | |
1173 | return ERR_PTR(-ENOMEM); | |
1174 | opendata->state = state; | |
1175 | atomic_inc(&state->count); | |
1176 | return opendata; | |
1177 | } | |
1178 | ||
1179 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) | |
1180 | { | |
1181 | struct nfs4_state *newstate; | |
1182 | int ret; | |
1183 | ||
1184 | opendata->o_arg.open_flags = 0; | |
1185 | opendata->o_arg.fmode = fmode; | |
1186 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); | |
1187 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1188 | nfs4_init_opendata_res(opendata); | |
1189 | ret = _nfs4_recover_proc_open(opendata); | |
1190 | if (ret != 0) | |
1191 | return ret; | |
1192 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
1193 | if (IS_ERR(newstate)) | |
1194 | return PTR_ERR(newstate); | |
1195 | nfs4_close_state(newstate, fmode); | |
1196 | *res = newstate; | |
1197 | return 0; | |
1198 | } | |
1199 | ||
1200 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1201 | { | |
1202 | struct nfs4_state *newstate; | |
1203 | int ret; | |
1204 | ||
1205 | /* memory barrier prior to reading state->n_* */ | |
1206 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1207 | smp_rmb(); | |
1208 | if (state->n_rdwr != 0) { | |
1209 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1210 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); | |
1211 | if (ret != 0) | |
1212 | return ret; | |
1213 | if (newstate != state) | |
1214 | return -ESTALE; | |
1215 | } | |
1216 | if (state->n_wronly != 0) { | |
1217 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1218 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); | |
1219 | if (ret != 0) | |
1220 | return ret; | |
1221 | if (newstate != state) | |
1222 | return -ESTALE; | |
1223 | } | |
1224 | if (state->n_rdonly != 0) { | |
1225 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1226 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); | |
1227 | if (ret != 0) | |
1228 | return ret; | |
1229 | if (newstate != state) | |
1230 | return -ESTALE; | |
1231 | } | |
1232 | /* | |
1233 | * We may have performed cached opens for all three recoveries. | |
1234 | * Check if we need to update the current stateid. | |
1235 | */ | |
1236 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1237 | !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { | |
1238 | write_seqlock(&state->seqlock); | |
1239 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
1240 | nfs4_stateid_copy(&state->stateid, &state->open_stateid); | |
1241 | write_sequnlock(&state->seqlock); | |
1242 | } | |
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * OPEN_RECLAIM: | |
1248 | * reclaim state on the server after a reboot. | |
1249 | */ | |
1250 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1251 | { | |
1252 | struct nfs_delegation *delegation; | |
1253 | struct nfs4_opendata *opendata; | |
1254 | fmode_t delegation_type = 0; | |
1255 | int status; | |
1256 | ||
1257 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1258 | if (IS_ERR(opendata)) | |
1259 | return PTR_ERR(opendata); | |
1260 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; | |
1261 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1262 | rcu_read_lock(); | |
1263 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
1264 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) | |
1265 | delegation_type = delegation->type; | |
1266 | rcu_read_unlock(); | |
1267 | opendata->o_arg.u.delegation_type = delegation_type; | |
1268 | status = nfs4_open_recover(opendata, state); | |
1269 | nfs4_opendata_put(opendata); | |
1270 | return status; | |
1271 | } | |
1272 | ||
1273 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1274 | { | |
1275 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1276 | struct nfs4_exception exception = { }; | |
1277 | int err; | |
1278 | do { | |
1279 | err = _nfs4_do_open_reclaim(ctx, state); | |
1280 | if (err != -NFS4ERR_DELAY) | |
1281 | break; | |
1282 | nfs4_handle_exception(server, err, &exception); | |
1283 | } while (exception.retry); | |
1284 | return err; | |
1285 | } | |
1286 | ||
1287 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1288 | { | |
1289 | struct nfs_open_context *ctx; | |
1290 | int ret; | |
1291 | ||
1292 | ctx = nfs4_state_find_open_context(state); | |
1293 | if (IS_ERR(ctx)) | |
1294 | return PTR_ERR(ctx); | |
1295 | ret = nfs4_do_open_reclaim(ctx, state); | |
1296 | put_nfs_open_context(ctx); | |
1297 | return ret; | |
1298 | } | |
1299 | ||
1300 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1301 | { | |
1302 | struct nfs4_opendata *opendata; | |
1303 | int ret; | |
1304 | ||
1305 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1306 | if (IS_ERR(opendata)) | |
1307 | return PTR_ERR(opendata); | |
1308 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; | |
1309 | nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); | |
1310 | ret = nfs4_open_recover(opendata, state); | |
1311 | nfs4_opendata_put(opendata); | |
1312 | return ret; | |
1313 | } | |
1314 | ||
1315 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1316 | { | |
1317 | struct nfs4_exception exception = { }; | |
1318 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1319 | int err; | |
1320 | do { | |
1321 | err = _nfs4_open_delegation_recall(ctx, state, stateid); | |
1322 | switch (err) { | |
1323 | case 0: | |
1324 | case -ENOENT: | |
1325 | case -ESTALE: | |
1326 | goto out; | |
1327 | case -NFS4ERR_BADSESSION: | |
1328 | case -NFS4ERR_BADSLOT: | |
1329 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1330 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1331 | case -NFS4ERR_DEADSESSION: | |
1332 | nfs4_schedule_session_recovery(server->nfs_client->cl_session); | |
1333 | goto out; | |
1334 | case -NFS4ERR_STALE_CLIENTID: | |
1335 | case -NFS4ERR_STALE_STATEID: | |
1336 | case -NFS4ERR_EXPIRED: | |
1337 | /* Don't recall a delegation if it was lost */ | |
1338 | nfs4_schedule_lease_recovery(server->nfs_client); | |
1339 | goto out; | |
1340 | case -ERESTARTSYS: | |
1341 | /* | |
1342 | * The show must go on: exit, but mark the | |
1343 | * stateid as needing recovery. | |
1344 | */ | |
1345 | case -NFS4ERR_DELEG_REVOKED: | |
1346 | case -NFS4ERR_ADMIN_REVOKED: | |
1347 | case -NFS4ERR_BAD_STATEID: | |
1348 | nfs_inode_find_state_and_recover(state->inode, | |
1349 | stateid); | |
1350 | nfs4_schedule_stateid_recovery(server, state); | |
1351 | case -EKEYEXPIRED: | |
1352 | /* | |
1353 | * User RPCSEC_GSS context has expired. | |
1354 | * We cannot recover this stateid now, so | |
1355 | * skip it and allow recovery thread to | |
1356 | * proceed. | |
1357 | */ | |
1358 | case -ENOMEM: | |
1359 | err = 0; | |
1360 | goto out; | |
1361 | } | |
1362 | err = nfs4_handle_exception(server, err, &exception); | |
1363 | } while (exception.retry); | |
1364 | out: | |
1365 | return err; | |
1366 | } | |
1367 | ||
1368 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
1369 | { | |
1370 | struct nfs4_opendata *data = calldata; | |
1371 | ||
1372 | data->rpc_status = task->tk_status; | |
1373 | if (data->rpc_status == 0) { | |
1374 | nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); | |
1375 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1376 | renew_lease(data->o_res.server, data->timestamp); | |
1377 | data->rpc_done = 1; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | static void nfs4_open_confirm_release(void *calldata) | |
1382 | { | |
1383 | struct nfs4_opendata *data = calldata; | |
1384 | struct nfs4_state *state = NULL; | |
1385 | ||
1386 | /* If this request hasn't been cancelled, do nothing */ | |
1387 | if (data->cancelled == 0) | |
1388 | goto out_free; | |
1389 | /* In case of error, no cleanup! */ | |
1390 | if (!data->rpc_done) | |
1391 | goto out_free; | |
1392 | state = nfs4_opendata_to_nfs4_state(data); | |
1393 | if (!IS_ERR(state)) | |
1394 | nfs4_close_state(state, data->o_arg.fmode); | |
1395 | out_free: | |
1396 | nfs4_opendata_put(data); | |
1397 | } | |
1398 | ||
1399 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
1400 | .rpc_call_done = nfs4_open_confirm_done, | |
1401 | .rpc_release = nfs4_open_confirm_release, | |
1402 | }; | |
1403 | ||
1404 | /* | |
1405 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1406 | */ | |
1407 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1408 | { | |
1409 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1410 | struct rpc_task *task; | |
1411 | struct rpc_message msg = { | |
1412 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1413 | .rpc_argp = &data->c_arg, | |
1414 | .rpc_resp = &data->c_res, | |
1415 | .rpc_cred = data->owner->so_cred, | |
1416 | }; | |
1417 | struct rpc_task_setup task_setup_data = { | |
1418 | .rpc_client = server->client, | |
1419 | .rpc_message = &msg, | |
1420 | .callback_ops = &nfs4_open_confirm_ops, | |
1421 | .callback_data = data, | |
1422 | .workqueue = nfsiod_workqueue, | |
1423 | .flags = RPC_TASK_ASYNC, | |
1424 | }; | |
1425 | int status; | |
1426 | ||
1427 | kref_get(&data->kref); | |
1428 | data->rpc_done = 0; | |
1429 | data->rpc_status = 0; | |
1430 | data->timestamp = jiffies; | |
1431 | task = rpc_run_task(&task_setup_data); | |
1432 | if (IS_ERR(task)) | |
1433 | return PTR_ERR(task); | |
1434 | status = nfs4_wait_for_completion_rpc_task(task); | |
1435 | if (status != 0) { | |
1436 | data->cancelled = 1; | |
1437 | smp_wmb(); | |
1438 | } else | |
1439 | status = data->rpc_status; | |
1440 | rpc_put_task(task); | |
1441 | return status; | |
1442 | } | |
1443 | ||
1444 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) | |
1445 | { | |
1446 | struct nfs4_opendata *data = calldata; | |
1447 | struct nfs4_state_owner *sp = data->owner; | |
1448 | ||
1449 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
1450 | return; | |
1451 | /* | |
1452 | * Check if we still need to send an OPEN call, or if we can use | |
1453 | * a delegation instead. | |
1454 | */ | |
1455 | if (data->state != NULL) { | |
1456 | struct nfs_delegation *delegation; | |
1457 | ||
1458 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) | |
1459 | goto out_no_action; | |
1460 | rcu_read_lock(); | |
1461 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1462 | if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && | |
1463 | can_open_delegated(delegation, data->o_arg.fmode)) | |
1464 | goto unlock_no_action; | |
1465 | rcu_read_unlock(); | |
1466 | } | |
1467 | /* Update client id. */ | |
1468 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; | |
1469 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { | |
1470 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
1471 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); | |
1472 | } | |
1473 | data->timestamp = jiffies; | |
1474 | if (nfs4_setup_sequence(data->o_arg.server, | |
1475 | &data->o_arg.seq_args, | |
1476 | &data->o_res.seq_res, task)) | |
1477 | return; | |
1478 | rpc_call_start(task); | |
1479 | return; | |
1480 | unlock_no_action: | |
1481 | rcu_read_unlock(); | |
1482 | out_no_action: | |
1483 | task->tk_action = NULL; | |
1484 | ||
1485 | } | |
1486 | ||
1487 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) | |
1488 | { | |
1489 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
1490 | nfs4_open_prepare(task, calldata); | |
1491 | } | |
1492 | ||
1493 | static void nfs4_open_done(struct rpc_task *task, void *calldata) | |
1494 | { | |
1495 | struct nfs4_opendata *data = calldata; | |
1496 | ||
1497 | data->rpc_status = task->tk_status; | |
1498 | ||
1499 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) | |
1500 | return; | |
1501 | ||
1502 | if (task->tk_status == 0) { | |
1503 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
1504 | case S_IFREG: | |
1505 | break; | |
1506 | case S_IFLNK: | |
1507 | data->rpc_status = -ELOOP; | |
1508 | break; | |
1509 | case S_IFDIR: | |
1510 | data->rpc_status = -EISDIR; | |
1511 | break; | |
1512 | default: | |
1513 | data->rpc_status = -ENOTDIR; | |
1514 | } | |
1515 | renew_lease(data->o_res.server, data->timestamp); | |
1516 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) | |
1517 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1518 | } | |
1519 | data->rpc_done = 1; | |
1520 | } | |
1521 | ||
1522 | static void nfs4_open_release(void *calldata) | |
1523 | { | |
1524 | struct nfs4_opendata *data = calldata; | |
1525 | struct nfs4_state *state = NULL; | |
1526 | ||
1527 | /* If this request hasn't been cancelled, do nothing */ | |
1528 | if (data->cancelled == 0) | |
1529 | goto out_free; | |
1530 | /* In case of error, no cleanup! */ | |
1531 | if (data->rpc_status != 0 || !data->rpc_done) | |
1532 | goto out_free; | |
1533 | /* In case we need an open_confirm, no cleanup! */ | |
1534 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1535 | goto out_free; | |
1536 | state = nfs4_opendata_to_nfs4_state(data); | |
1537 | if (!IS_ERR(state)) | |
1538 | nfs4_close_state(state, data->o_arg.fmode); | |
1539 | out_free: | |
1540 | nfs4_opendata_put(data); | |
1541 | } | |
1542 | ||
1543 | static const struct rpc_call_ops nfs4_open_ops = { | |
1544 | .rpc_call_prepare = nfs4_open_prepare, | |
1545 | .rpc_call_done = nfs4_open_done, | |
1546 | .rpc_release = nfs4_open_release, | |
1547 | }; | |
1548 | ||
1549 | static const struct rpc_call_ops nfs4_recover_open_ops = { | |
1550 | .rpc_call_prepare = nfs4_recover_open_prepare, | |
1551 | .rpc_call_done = nfs4_open_done, | |
1552 | .rpc_release = nfs4_open_release, | |
1553 | }; | |
1554 | ||
1555 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
1556 | { | |
1557 | struct inode *dir = data->dir->d_inode; | |
1558 | struct nfs_server *server = NFS_SERVER(dir); | |
1559 | struct nfs_openargs *o_arg = &data->o_arg; | |
1560 | struct nfs_openres *o_res = &data->o_res; | |
1561 | struct rpc_task *task; | |
1562 | struct rpc_message msg = { | |
1563 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1564 | .rpc_argp = o_arg, | |
1565 | .rpc_resp = o_res, | |
1566 | .rpc_cred = data->owner->so_cred, | |
1567 | }; | |
1568 | struct rpc_task_setup task_setup_data = { | |
1569 | .rpc_client = server->client, | |
1570 | .rpc_message = &msg, | |
1571 | .callback_ops = &nfs4_open_ops, | |
1572 | .callback_data = data, | |
1573 | .workqueue = nfsiod_workqueue, | |
1574 | .flags = RPC_TASK_ASYNC, | |
1575 | }; | |
1576 | int status; | |
1577 | ||
1578 | nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); | |
1579 | kref_get(&data->kref); | |
1580 | data->rpc_done = 0; | |
1581 | data->rpc_status = 0; | |
1582 | data->cancelled = 0; | |
1583 | if (isrecover) | |
1584 | task_setup_data.callback_ops = &nfs4_recover_open_ops; | |
1585 | task = rpc_run_task(&task_setup_data); | |
1586 | if (IS_ERR(task)) | |
1587 | return PTR_ERR(task); | |
1588 | status = nfs4_wait_for_completion_rpc_task(task); | |
1589 | if (status != 0) { | |
1590 | data->cancelled = 1; | |
1591 | smp_wmb(); | |
1592 | } else | |
1593 | status = data->rpc_status; | |
1594 | rpc_put_task(task); | |
1595 | ||
1596 | return status; | |
1597 | } | |
1598 | ||
1599 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1600 | { | |
1601 | struct inode *dir = data->dir->d_inode; | |
1602 | struct nfs_openres *o_res = &data->o_res; | |
1603 | int status; | |
1604 | ||
1605 | status = nfs4_run_open_task(data, 1); | |
1606 | if (status != 0 || !data->rpc_done) | |
1607 | return status; | |
1608 | ||
1609 | nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); | |
1610 | ||
1611 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1612 | status = _nfs4_proc_open_confirm(data); | |
1613 | if (status != 0) | |
1614 | return status; | |
1615 | } | |
1616 | ||
1617 | return status; | |
1618 | } | |
1619 | ||
1620 | /* | |
1621 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1622 | */ | |
1623 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1624 | { | |
1625 | struct inode *dir = data->dir->d_inode; | |
1626 | struct nfs_server *server = NFS_SERVER(dir); | |
1627 | struct nfs_openargs *o_arg = &data->o_arg; | |
1628 | struct nfs_openres *o_res = &data->o_res; | |
1629 | int status; | |
1630 | ||
1631 | status = nfs4_run_open_task(data, 0); | |
1632 | if (!data->rpc_done) | |
1633 | return status; | |
1634 | if (status != 0) { | |
1635 | if (status == -NFS4ERR_BADNAME && | |
1636 | !(o_arg->open_flags & O_CREAT)) | |
1637 | return -ENOENT; | |
1638 | return status; | |
1639 | } | |
1640 | ||
1641 | nfs_fattr_map_and_free_names(server, &data->f_attr); | |
1642 | ||
1643 | if (o_arg->open_flags & O_CREAT) | |
1644 | update_changeattr(dir, &o_res->cinfo); | |
1645 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) | |
1646 | server->caps &= ~NFS_CAP_POSIX_LOCK; | |
1647 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1648 | status = _nfs4_proc_open_confirm(data); | |
1649 | if (status != 0) | |
1650 | return status; | |
1651 | } | |
1652 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
1653 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); | |
1654 | return 0; | |
1655 | } | |
1656 | ||
1657 | static int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1658 | { | |
1659 | unsigned int loop; | |
1660 | int ret; | |
1661 | ||
1662 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1663 | ret = nfs4_wait_clnt_recover(clp); | |
1664 | if (ret != 0) | |
1665 | break; | |
1666 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1667 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1668 | break; | |
1669 | nfs4_schedule_state_manager(clp); | |
1670 | ret = -EIO; | |
1671 | } | |
1672 | return ret; | |
1673 | } | |
1674 | ||
1675 | static int nfs4_recover_expired_lease(struct nfs_server *server) | |
1676 | { | |
1677 | return nfs4_client_recover_expired_lease(server->nfs_client); | |
1678 | } | |
1679 | ||
1680 | /* | |
1681 | * OPEN_EXPIRED: | |
1682 | * reclaim state on the server after a network partition. | |
1683 | * Assumes caller holds the appropriate lock | |
1684 | */ | |
1685 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1686 | { | |
1687 | struct nfs4_opendata *opendata; | |
1688 | int ret; | |
1689 | ||
1690 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1691 | if (IS_ERR(opendata)) | |
1692 | return PTR_ERR(opendata); | |
1693 | ret = nfs4_open_recover(opendata, state); | |
1694 | if (ret == -ESTALE) | |
1695 | d_drop(ctx->dentry); | |
1696 | nfs4_opendata_put(opendata); | |
1697 | return ret; | |
1698 | } | |
1699 | ||
1700 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1701 | { | |
1702 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1703 | struct nfs4_exception exception = { }; | |
1704 | int err; | |
1705 | ||
1706 | do { | |
1707 | err = _nfs4_open_expired(ctx, state); | |
1708 | switch (err) { | |
1709 | default: | |
1710 | goto out; | |
1711 | case -NFS4ERR_GRACE: | |
1712 | case -NFS4ERR_DELAY: | |
1713 | nfs4_handle_exception(server, err, &exception); | |
1714 | err = 0; | |
1715 | } | |
1716 | } while (exception.retry); | |
1717 | out: | |
1718 | return err; | |
1719 | } | |
1720 | ||
1721 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1722 | { | |
1723 | struct nfs_open_context *ctx; | |
1724 | int ret; | |
1725 | ||
1726 | ctx = nfs4_state_find_open_context(state); | |
1727 | if (IS_ERR(ctx)) | |
1728 | return PTR_ERR(ctx); | |
1729 | ret = nfs4_do_open_expired(ctx, state); | |
1730 | put_nfs_open_context(ctx); | |
1731 | return ret; | |
1732 | } | |
1733 | ||
1734 | #if defined(CONFIG_NFS_V4_1) | |
1735 | static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags) | |
1736 | { | |
1737 | int status = NFS_OK; | |
1738 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1739 | ||
1740 | if (state->flags & flags) { | |
1741 | status = nfs41_test_stateid(server, stateid); | |
1742 | if (status != NFS_OK) { | |
1743 | nfs41_free_stateid(server, stateid); | |
1744 | state->flags &= ~flags; | |
1745 | } | |
1746 | } | |
1747 | return status; | |
1748 | } | |
1749 | ||
1750 | static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1751 | { | |
1752 | int deleg_status, open_status; | |
1753 | int deleg_flags = 1 << NFS_DELEGATED_STATE; | |
1754 | int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE); | |
1755 | ||
1756 | deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags); | |
1757 | open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags); | |
1758 | ||
1759 | if ((deleg_status == NFS_OK) && (open_status == NFS_OK)) | |
1760 | return NFS_OK; | |
1761 | return nfs4_open_expired(sp, state); | |
1762 | } | |
1763 | #endif | |
1764 | ||
1765 | /* | |
1766 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1767 | * fields corresponding to attributes that were used to store the verifier. | |
1768 | * Make sure we clobber those fields in the later setattr call | |
1769 | */ | |
1770 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1771 | { | |
1772 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1773 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1774 | sattr->ia_valid |= ATTR_ATIME; | |
1775 | ||
1776 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1777 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1778 | sattr->ia_valid |= ATTR_MTIME; | |
1779 | } | |
1780 | ||
1781 | /* | |
1782 | * Returns a referenced nfs4_state | |
1783 | */ | |
1784 | static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
1785 | { | |
1786 | struct nfs4_state_owner *sp; | |
1787 | struct nfs4_state *state = NULL; | |
1788 | struct nfs_server *server = NFS_SERVER(dir); | |
1789 | struct nfs4_opendata *opendata; | |
1790 | int status; | |
1791 | ||
1792 | /* Protect against reboot recovery conflicts */ | |
1793 | status = -ENOMEM; | |
1794 | sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); | |
1795 | if (sp == NULL) { | |
1796 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1797 | goto out_err; | |
1798 | } | |
1799 | status = nfs4_recover_expired_lease(server); | |
1800 | if (status != 0) | |
1801 | goto err_put_state_owner; | |
1802 | if (dentry->d_inode != NULL) | |
1803 | nfs4_return_incompatible_delegation(dentry->d_inode, fmode); | |
1804 | status = -ENOMEM; | |
1805 | opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL); | |
1806 | if (opendata == NULL) | |
1807 | goto err_put_state_owner; | |
1808 | ||
1809 | if (dentry->d_inode != NULL) | |
1810 | opendata->state = nfs4_get_open_state(dentry->d_inode, sp); | |
1811 | ||
1812 | status = _nfs4_proc_open(opendata); | |
1813 | if (status != 0) | |
1814 | goto err_opendata_put; | |
1815 | ||
1816 | state = nfs4_opendata_to_nfs4_state(opendata); | |
1817 | status = PTR_ERR(state); | |
1818 | if (IS_ERR(state)) | |
1819 | goto err_opendata_put; | |
1820 | if (server->caps & NFS_CAP_POSIX_LOCK) | |
1821 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); | |
1822 | ||
1823 | if (opendata->o_arg.open_flags & O_EXCL) { | |
1824 | nfs4_exclusive_attrset(opendata, sattr); | |
1825 | ||
1826 | nfs_fattr_init(opendata->o_res.f_attr); | |
1827 | status = nfs4_do_setattr(state->inode, cred, | |
1828 | opendata->o_res.f_attr, sattr, | |
1829 | state); | |
1830 | if (status == 0) | |
1831 | nfs_setattr_update_inode(state->inode, sattr); | |
1832 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); | |
1833 | } | |
1834 | nfs4_opendata_put(opendata); | |
1835 | nfs4_put_state_owner(sp); | |
1836 | *res = state; | |
1837 | return 0; | |
1838 | err_opendata_put: | |
1839 | nfs4_opendata_put(opendata); | |
1840 | err_put_state_owner: | |
1841 | nfs4_put_state_owner(sp); | |
1842 | out_err: | |
1843 | *res = NULL; | |
1844 | return status; | |
1845 | } | |
1846 | ||
1847 | ||
1848 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
1849 | { | |
1850 | struct nfs4_exception exception = { }; | |
1851 | struct nfs4_state *res; | |
1852 | int status; | |
1853 | ||
1854 | do { | |
1855 | status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res); | |
1856 | if (status == 0) | |
1857 | break; | |
1858 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1859 | * book-keeping w.r.t. state-changing operations | |
1860 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1861 | * It is actually a sign of a bug on the client or on the server. | |
1862 | * | |
1863 | * If we receive a BAD_SEQID error in the particular case of | |
1864 | * doing an OPEN, we assume that nfs_increment_open_seqid() will | |
1865 | * have unhashed the old state_owner for us, and that we can | |
1866 | * therefore safely retry using a new one. We should still warn | |
1867 | * the user though... | |
1868 | */ | |
1869 | if (status == -NFS4ERR_BAD_SEQID) { | |
1870 | pr_warn_ratelimited("NFS: v4 server %s " | |
1871 | " returned a bad sequence-id error!\n", | |
1872 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1873 | exception.retry = 1; | |
1874 | continue; | |
1875 | } | |
1876 | /* | |
1877 | * BAD_STATEID on OPEN means that the server cancelled our | |
1878 | * state before it received the OPEN_CONFIRM. | |
1879 | * Recover by retrying the request as per the discussion | |
1880 | * on Page 181 of RFC3530. | |
1881 | */ | |
1882 | if (status == -NFS4ERR_BAD_STATEID) { | |
1883 | exception.retry = 1; | |
1884 | continue; | |
1885 | } | |
1886 | if (status == -EAGAIN) { | |
1887 | /* We must have found a delegation */ | |
1888 | exception.retry = 1; | |
1889 | continue; | |
1890 | } | |
1891 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), | |
1892 | status, &exception)); | |
1893 | } while (exception.retry); | |
1894 | return res; | |
1895 | } | |
1896 | ||
1897 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
1898 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1899 | struct nfs4_state *state) | |
1900 | { | |
1901 | struct nfs_server *server = NFS_SERVER(inode); | |
1902 | struct nfs_setattrargs arg = { | |
1903 | .fh = NFS_FH(inode), | |
1904 | .iap = sattr, | |
1905 | .server = server, | |
1906 | .bitmask = server->attr_bitmask, | |
1907 | }; | |
1908 | struct nfs_setattrres res = { | |
1909 | .fattr = fattr, | |
1910 | .server = server, | |
1911 | }; | |
1912 | struct rpc_message msg = { | |
1913 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1914 | .rpc_argp = &arg, | |
1915 | .rpc_resp = &res, | |
1916 | .rpc_cred = cred, | |
1917 | }; | |
1918 | unsigned long timestamp = jiffies; | |
1919 | int status; | |
1920 | ||
1921 | nfs_fattr_init(fattr); | |
1922 | ||
1923 | if (state != NULL) { | |
1924 | nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, | |
1925 | current->files, current->tgid); | |
1926 | } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode, | |
1927 | FMODE_WRITE)) { | |
1928 | /* Use that stateid */ | |
1929 | } else | |
1930 | nfs4_stateid_copy(&arg.stateid, &zero_stateid); | |
1931 | ||
1932 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
1933 | if (status == 0 && state != NULL) | |
1934 | renew_lease(server, timestamp); | |
1935 | return status; | |
1936 | } | |
1937 | ||
1938 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
1939 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1940 | struct nfs4_state *state) | |
1941 | { | |
1942 | struct nfs_server *server = NFS_SERVER(inode); | |
1943 | struct nfs4_exception exception = { | |
1944 | .state = state, | |
1945 | .inode = inode, | |
1946 | }; | |
1947 | int err; | |
1948 | do { | |
1949 | err = _nfs4_do_setattr(inode, cred, fattr, sattr, state); | |
1950 | switch (err) { | |
1951 | case -NFS4ERR_OPENMODE: | |
1952 | if (state && !(state->state & FMODE_WRITE)) { | |
1953 | err = -EBADF; | |
1954 | if (sattr->ia_valid & ATTR_OPEN) | |
1955 | err = -EACCES; | |
1956 | goto out; | |
1957 | } | |
1958 | } | |
1959 | err = nfs4_handle_exception(server, err, &exception); | |
1960 | } while (exception.retry); | |
1961 | out: | |
1962 | return err; | |
1963 | } | |
1964 | ||
1965 | struct nfs4_closedata { | |
1966 | struct inode *inode; | |
1967 | struct nfs4_state *state; | |
1968 | struct nfs_closeargs arg; | |
1969 | struct nfs_closeres res; | |
1970 | struct nfs_fattr fattr; | |
1971 | unsigned long timestamp; | |
1972 | bool roc; | |
1973 | u32 roc_barrier; | |
1974 | }; | |
1975 | ||
1976 | static void nfs4_free_closedata(void *data) | |
1977 | { | |
1978 | struct nfs4_closedata *calldata = data; | |
1979 | struct nfs4_state_owner *sp = calldata->state->owner; | |
1980 | struct super_block *sb = calldata->state->inode->i_sb; | |
1981 | ||
1982 | if (calldata->roc) | |
1983 | pnfs_roc_release(calldata->state->inode); | |
1984 | nfs4_put_open_state(calldata->state); | |
1985 | nfs_free_seqid(calldata->arg.seqid); | |
1986 | nfs4_put_state_owner(sp); | |
1987 | nfs_sb_deactive(sb); | |
1988 | kfree(calldata); | |
1989 | } | |
1990 | ||
1991 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, | |
1992 | fmode_t fmode) | |
1993 | { | |
1994 | spin_lock(&state->owner->so_lock); | |
1995 | if (!(fmode & FMODE_READ)) | |
1996 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1997 | if (!(fmode & FMODE_WRITE)) | |
1998 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1999 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
2000 | spin_unlock(&state->owner->so_lock); | |
2001 | } | |
2002 | ||
2003 | static void nfs4_close_done(struct rpc_task *task, void *data) | |
2004 | { | |
2005 | struct nfs4_closedata *calldata = data; | |
2006 | struct nfs4_state *state = calldata->state; | |
2007 | struct nfs_server *server = NFS_SERVER(calldata->inode); | |
2008 | ||
2009 | dprintk("%s: begin!\n", __func__); | |
2010 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) | |
2011 | return; | |
2012 | /* hmm. we are done with the inode, and in the process of freeing | |
2013 | * the state_owner. we keep this around to process errors | |
2014 | */ | |
2015 | switch (task->tk_status) { | |
2016 | case 0: | |
2017 | if (calldata->roc) | |
2018 | pnfs_roc_set_barrier(state->inode, | |
2019 | calldata->roc_barrier); | |
2020 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); | |
2021 | renew_lease(server, calldata->timestamp); | |
2022 | nfs4_close_clear_stateid_flags(state, | |
2023 | calldata->arg.fmode); | |
2024 | break; | |
2025 | case -NFS4ERR_STALE_STATEID: | |
2026 | case -NFS4ERR_OLD_STATEID: | |
2027 | case -NFS4ERR_BAD_STATEID: | |
2028 | case -NFS4ERR_EXPIRED: | |
2029 | if (calldata->arg.fmode == 0) | |
2030 | break; | |
2031 | default: | |
2032 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) | |
2033 | rpc_restart_call_prepare(task); | |
2034 | } | |
2035 | nfs_release_seqid(calldata->arg.seqid); | |
2036 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); | |
2037 | dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); | |
2038 | } | |
2039 | ||
2040 | static void nfs4_close_prepare(struct rpc_task *task, void *data) | |
2041 | { | |
2042 | struct nfs4_closedata *calldata = data; | |
2043 | struct nfs4_state *state = calldata->state; | |
2044 | int call_close = 0; | |
2045 | ||
2046 | dprintk("%s: begin!\n", __func__); | |
2047 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
2048 | return; | |
2049 | ||
2050 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; | |
2051 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
2052 | spin_lock(&state->owner->so_lock); | |
2053 | /* Calculate the change in open mode */ | |
2054 | if (state->n_rdwr == 0) { | |
2055 | if (state->n_rdonly == 0) { | |
2056 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); | |
2057 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
2058 | calldata->arg.fmode &= ~FMODE_READ; | |
2059 | } | |
2060 | if (state->n_wronly == 0) { | |
2061 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); | |
2062 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
2063 | calldata->arg.fmode &= ~FMODE_WRITE; | |
2064 | } | |
2065 | } | |
2066 | spin_unlock(&state->owner->so_lock); | |
2067 | ||
2068 | if (!call_close) { | |
2069 | /* Note: exit _without_ calling nfs4_close_done */ | |
2070 | task->tk_action = NULL; | |
2071 | goto out; | |
2072 | } | |
2073 | ||
2074 | if (calldata->arg.fmode == 0) { | |
2075 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
2076 | if (calldata->roc && | |
2077 | pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) { | |
2078 | rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq, | |
2079 | task, NULL); | |
2080 | goto out; | |
2081 | } | |
2082 | } | |
2083 | ||
2084 | nfs_fattr_init(calldata->res.fattr); | |
2085 | calldata->timestamp = jiffies; | |
2086 | if (nfs4_setup_sequence(NFS_SERVER(calldata->inode), | |
2087 | &calldata->arg.seq_args, | |
2088 | &calldata->res.seq_res, | |
2089 | task)) | |
2090 | goto out; | |
2091 | rpc_call_start(task); | |
2092 | out: | |
2093 | dprintk("%s: done!\n", __func__); | |
2094 | } | |
2095 | ||
2096 | static const struct rpc_call_ops nfs4_close_ops = { | |
2097 | .rpc_call_prepare = nfs4_close_prepare, | |
2098 | .rpc_call_done = nfs4_close_done, | |
2099 | .rpc_release = nfs4_free_closedata, | |
2100 | }; | |
2101 | ||
2102 | /* | |
2103 | * It is possible for data to be read/written from a mem-mapped file | |
2104 | * after the sys_close call (which hits the vfs layer as a flush). | |
2105 | * This means that we can't safely call nfsv4 close on a file until | |
2106 | * the inode is cleared. This in turn means that we are not good | |
2107 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
2108 | * share state even when we are done with one of the three share | |
2109 | * stateid's in the inode. | |
2110 | * | |
2111 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
2112 | */ | |
2113 | int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc) | |
2114 | { | |
2115 | struct nfs_server *server = NFS_SERVER(state->inode); | |
2116 | struct nfs4_closedata *calldata; | |
2117 | struct nfs4_state_owner *sp = state->owner; | |
2118 | struct rpc_task *task; | |
2119 | struct rpc_message msg = { | |
2120 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
2121 | .rpc_cred = state->owner->so_cred, | |
2122 | }; | |
2123 | struct rpc_task_setup task_setup_data = { | |
2124 | .rpc_client = server->client, | |
2125 | .rpc_message = &msg, | |
2126 | .callback_ops = &nfs4_close_ops, | |
2127 | .workqueue = nfsiod_workqueue, | |
2128 | .flags = RPC_TASK_ASYNC, | |
2129 | }; | |
2130 | int status = -ENOMEM; | |
2131 | ||
2132 | calldata = kzalloc(sizeof(*calldata), gfp_mask); | |
2133 | if (calldata == NULL) | |
2134 | goto out; | |
2135 | nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); | |
2136 | calldata->inode = state->inode; | |
2137 | calldata->state = state; | |
2138 | calldata->arg.fh = NFS_FH(state->inode); | |
2139 | calldata->arg.stateid = &state->open_stateid; | |
2140 | /* Serialization for the sequence id */ | |
2141 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); | |
2142 | if (calldata->arg.seqid == NULL) | |
2143 | goto out_free_calldata; | |
2144 | calldata->arg.fmode = 0; | |
2145 | calldata->arg.bitmask = server->cache_consistency_bitmask; | |
2146 | calldata->res.fattr = &calldata->fattr; | |
2147 | calldata->res.seqid = calldata->arg.seqid; | |
2148 | calldata->res.server = server; | |
2149 | calldata->roc = roc; | |
2150 | nfs_sb_active(calldata->inode->i_sb); | |
2151 | ||
2152 | msg.rpc_argp = &calldata->arg; | |
2153 | msg.rpc_resp = &calldata->res; | |
2154 | task_setup_data.callback_data = calldata; | |
2155 | task = rpc_run_task(&task_setup_data); | |
2156 | if (IS_ERR(task)) | |
2157 | return PTR_ERR(task); | |
2158 | status = 0; | |
2159 | if (wait) | |
2160 | status = rpc_wait_for_completion_task(task); | |
2161 | rpc_put_task(task); | |
2162 | return status; | |
2163 | out_free_calldata: | |
2164 | kfree(calldata); | |
2165 | out: | |
2166 | if (roc) | |
2167 | pnfs_roc_release(state->inode); | |
2168 | nfs4_put_open_state(state); | |
2169 | nfs4_put_state_owner(sp); | |
2170 | return status; | |
2171 | } | |
2172 | ||
2173 | static struct inode * | |
2174 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) | |
2175 | { | |
2176 | struct nfs4_state *state; | |
2177 | ||
2178 | /* Protect against concurrent sillydeletes */ | |
2179 | state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred); | |
2180 | if (IS_ERR(state)) | |
2181 | return ERR_CAST(state); | |
2182 | ctx->state = state; | |
2183 | return igrab(state->inode); | |
2184 | } | |
2185 | ||
2186 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) | |
2187 | { | |
2188 | if (ctx->state == NULL) | |
2189 | return; | |
2190 | if (is_sync) | |
2191 | nfs4_close_sync(ctx->state, ctx->mode); | |
2192 | else | |
2193 | nfs4_close_state(ctx->state, ctx->mode); | |
2194 | } | |
2195 | ||
2196 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2197 | { | |
2198 | struct nfs4_server_caps_arg args = { | |
2199 | .fhandle = fhandle, | |
2200 | }; | |
2201 | struct nfs4_server_caps_res res = {}; | |
2202 | struct rpc_message msg = { | |
2203 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
2204 | .rpc_argp = &args, | |
2205 | .rpc_resp = &res, | |
2206 | }; | |
2207 | int status; | |
2208 | ||
2209 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2210 | if (status == 0) { | |
2211 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
2212 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| | |
2213 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2214 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2215 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2216 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
2217 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
2218 | server->caps |= NFS_CAP_ACLS; | |
2219 | if (res.has_links != 0) | |
2220 | server->caps |= NFS_CAP_HARDLINKS; | |
2221 | if (res.has_symlinks != 0) | |
2222 | server->caps |= NFS_CAP_SYMLINKS; | |
2223 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) | |
2224 | server->caps |= NFS_CAP_FILEID; | |
2225 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2226 | server->caps |= NFS_CAP_MODE; | |
2227 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2228 | server->caps |= NFS_CAP_NLINK; | |
2229 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2230 | server->caps |= NFS_CAP_OWNER; | |
2231 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2232 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2233 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2234 | server->caps |= NFS_CAP_ATIME; | |
2235 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2236 | server->caps |= NFS_CAP_CTIME; | |
2237 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2238 | server->caps |= NFS_CAP_MTIME; | |
2239 | ||
2240 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); | |
2241 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2242 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
2243 | server->acl_bitmask = res.acl_bitmask; | |
2244 | server->fh_expire_type = res.fh_expire_type; | |
2245 | } | |
2246 | ||
2247 | return status; | |
2248 | } | |
2249 | ||
2250 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2251 | { | |
2252 | struct nfs4_exception exception = { }; | |
2253 | int err; | |
2254 | do { | |
2255 | err = nfs4_handle_exception(server, | |
2256 | _nfs4_server_capabilities(server, fhandle), | |
2257 | &exception); | |
2258 | } while (exception.retry); | |
2259 | return err; | |
2260 | } | |
2261 | ||
2262 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2263 | struct nfs_fsinfo *info) | |
2264 | { | |
2265 | struct nfs4_lookup_root_arg args = { | |
2266 | .bitmask = nfs4_fattr_bitmap, | |
2267 | }; | |
2268 | struct nfs4_lookup_res res = { | |
2269 | .server = server, | |
2270 | .fattr = info->fattr, | |
2271 | .fh = fhandle, | |
2272 | }; | |
2273 | struct rpc_message msg = { | |
2274 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2275 | .rpc_argp = &args, | |
2276 | .rpc_resp = &res, | |
2277 | }; | |
2278 | ||
2279 | nfs_fattr_init(info->fattr); | |
2280 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2281 | } | |
2282 | ||
2283 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2284 | struct nfs_fsinfo *info) | |
2285 | { | |
2286 | struct nfs4_exception exception = { }; | |
2287 | int err; | |
2288 | do { | |
2289 | err = _nfs4_lookup_root(server, fhandle, info); | |
2290 | switch (err) { | |
2291 | case 0: | |
2292 | case -NFS4ERR_WRONGSEC: | |
2293 | goto out; | |
2294 | default: | |
2295 | err = nfs4_handle_exception(server, err, &exception); | |
2296 | } | |
2297 | } while (exception.retry); | |
2298 | out: | |
2299 | return err; | |
2300 | } | |
2301 | ||
2302 | static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
2303 | struct nfs_fsinfo *info, rpc_authflavor_t flavor) | |
2304 | { | |
2305 | struct rpc_auth *auth; | |
2306 | int ret; | |
2307 | ||
2308 | auth = rpcauth_create(flavor, server->client); | |
2309 | if (!auth) { | |
2310 | ret = -EIO; | |
2311 | goto out; | |
2312 | } | |
2313 | ret = nfs4_lookup_root(server, fhandle, info); | |
2314 | out: | |
2315 | return ret; | |
2316 | } | |
2317 | ||
2318 | static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
2319 | struct nfs_fsinfo *info) | |
2320 | { | |
2321 | int i, len, status = 0; | |
2322 | rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS]; | |
2323 | ||
2324 | len = gss_mech_list_pseudoflavors(&flav_array[0]); | |
2325 | flav_array[len] = RPC_AUTH_NULL; | |
2326 | len += 1; | |
2327 | ||
2328 | for (i = 0; i < len; i++) { | |
2329 | status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]); | |
2330 | if (status == -NFS4ERR_WRONGSEC || status == -EACCES) | |
2331 | continue; | |
2332 | break; | |
2333 | } | |
2334 | /* | |
2335 | * -EACCESS could mean that the user doesn't have correct permissions | |
2336 | * to access the mount. It could also mean that we tried to mount | |
2337 | * with a gss auth flavor, but rpc.gssd isn't running. Either way, | |
2338 | * existing mount programs don't handle -EACCES very well so it should | |
2339 | * be mapped to -EPERM instead. | |
2340 | */ | |
2341 | if (status == -EACCES) | |
2342 | status = -EPERM; | |
2343 | return status; | |
2344 | } | |
2345 | ||
2346 | /* | |
2347 | * get the file handle for the "/" directory on the server | |
2348 | */ | |
2349 | int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, | |
2350 | struct nfs_fsinfo *info) | |
2351 | { | |
2352 | int minor_version = server->nfs_client->cl_minorversion; | |
2353 | int status = nfs4_lookup_root(server, fhandle, info); | |
2354 | if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR)) | |
2355 | /* | |
2356 | * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM | |
2357 | * by nfs4_map_errors() as this function exits. | |
2358 | */ | |
2359 | status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info); | |
2360 | if (status == 0) | |
2361 | status = nfs4_server_capabilities(server, fhandle); | |
2362 | if (status == 0) | |
2363 | status = nfs4_do_fsinfo(server, fhandle, info); | |
2364 | return nfs4_map_errors(status); | |
2365 | } | |
2366 | ||
2367 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, | |
2368 | struct nfs_fsinfo *info) | |
2369 | { | |
2370 | int error; | |
2371 | struct nfs_fattr *fattr = info->fattr; | |
2372 | ||
2373 | error = nfs4_server_capabilities(server, mntfh); | |
2374 | if (error < 0) { | |
2375 | dprintk("nfs4_get_root: getcaps error = %d\n", -error); | |
2376 | return error; | |
2377 | } | |
2378 | ||
2379 | error = nfs4_proc_getattr(server, mntfh, fattr); | |
2380 | if (error < 0) { | |
2381 | dprintk("nfs4_get_root: getattr error = %d\n", -error); | |
2382 | return error; | |
2383 | } | |
2384 | ||
2385 | if (fattr->valid & NFS_ATTR_FATTR_FSID && | |
2386 | !nfs_fsid_equal(&server->fsid, &fattr->fsid)) | |
2387 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); | |
2388 | ||
2389 | return error; | |
2390 | } | |
2391 | ||
2392 | /* | |
2393 | * Get locations and (maybe) other attributes of a referral. | |
2394 | * Note that we'll actually follow the referral later when | |
2395 | * we detect fsid mismatch in inode revalidation | |
2396 | */ | |
2397 | static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, | |
2398 | const struct qstr *name, struct nfs_fattr *fattr, | |
2399 | struct nfs_fh *fhandle) | |
2400 | { | |
2401 | int status = -ENOMEM; | |
2402 | struct page *page = NULL; | |
2403 | struct nfs4_fs_locations *locations = NULL; | |
2404 | ||
2405 | page = alloc_page(GFP_KERNEL); | |
2406 | if (page == NULL) | |
2407 | goto out; | |
2408 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2409 | if (locations == NULL) | |
2410 | goto out; | |
2411 | ||
2412 | status = nfs4_proc_fs_locations(client, dir, name, locations, page); | |
2413 | if (status != 0) | |
2414 | goto out; | |
2415 | /* Make sure server returned a different fsid for the referral */ | |
2416 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
2417 | dprintk("%s: server did not return a different fsid for" | |
2418 | " a referral at %s\n", __func__, name->name); | |
2419 | status = -EIO; | |
2420 | goto out; | |
2421 | } | |
2422 | /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ | |
2423 | nfs_fixup_referral_attributes(&locations->fattr); | |
2424 | ||
2425 | /* replace the lookup nfs_fattr with the locations nfs_fattr */ | |
2426 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2427 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2428 | out: | |
2429 | if (page) | |
2430 | __free_page(page); | |
2431 | kfree(locations); | |
2432 | return status; | |
2433 | } | |
2434 | ||
2435 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2436 | { | |
2437 | struct nfs4_getattr_arg args = { | |
2438 | .fh = fhandle, | |
2439 | .bitmask = server->attr_bitmask, | |
2440 | }; | |
2441 | struct nfs4_getattr_res res = { | |
2442 | .fattr = fattr, | |
2443 | .server = server, | |
2444 | }; | |
2445 | struct rpc_message msg = { | |
2446 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2447 | .rpc_argp = &args, | |
2448 | .rpc_resp = &res, | |
2449 | }; | |
2450 | ||
2451 | nfs_fattr_init(fattr); | |
2452 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2453 | } | |
2454 | ||
2455 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2456 | { | |
2457 | struct nfs4_exception exception = { }; | |
2458 | int err; | |
2459 | do { | |
2460 | err = nfs4_handle_exception(server, | |
2461 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2462 | &exception); | |
2463 | } while (exception.retry); | |
2464 | return err; | |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * The file is not closed if it is opened due to the a request to change | |
2469 | * the size of the file. The open call will not be needed once the | |
2470 | * VFS layer lookup-intents are implemented. | |
2471 | * | |
2472 | * Close is called when the inode is destroyed. | |
2473 | * If we haven't opened the file for O_WRONLY, we | |
2474 | * need to in the size_change case to obtain a stateid. | |
2475 | * | |
2476 | * Got race? | |
2477 | * Because OPEN is always done by name in nfsv4, it is | |
2478 | * possible that we opened a different file by the same | |
2479 | * name. We can recognize this race condition, but we | |
2480 | * can't do anything about it besides returning an error. | |
2481 | * | |
2482 | * This will be fixed with VFS changes (lookup-intent). | |
2483 | */ | |
2484 | static int | |
2485 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2486 | struct iattr *sattr) | |
2487 | { | |
2488 | struct inode *inode = dentry->d_inode; | |
2489 | struct rpc_cred *cred = NULL; | |
2490 | struct nfs4_state *state = NULL; | |
2491 | int status; | |
2492 | ||
2493 | if (pnfs_ld_layoutret_on_setattr(inode)) | |
2494 | pnfs_return_layout(inode); | |
2495 | ||
2496 | nfs_fattr_init(fattr); | |
2497 | ||
2498 | /* Search for an existing open(O_WRITE) file */ | |
2499 | if (sattr->ia_valid & ATTR_FILE) { | |
2500 | struct nfs_open_context *ctx; | |
2501 | ||
2502 | ctx = nfs_file_open_context(sattr->ia_file); | |
2503 | if (ctx) { | |
2504 | cred = ctx->cred; | |
2505 | state = ctx->state; | |
2506 | } | |
2507 | } | |
2508 | ||
2509 | /* Deal with open(O_TRUNC) */ | |
2510 | if (sattr->ia_valid & ATTR_OPEN) | |
2511 | sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN); | |
2512 | ||
2513 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); | |
2514 | if (status == 0) | |
2515 | nfs_setattr_update_inode(inode, sattr); | |
2516 | return status; | |
2517 | } | |
2518 | ||
2519 | static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, | |
2520 | const struct qstr *name, struct nfs_fh *fhandle, | |
2521 | struct nfs_fattr *fattr) | |
2522 | { | |
2523 | struct nfs_server *server = NFS_SERVER(dir); | |
2524 | int status; | |
2525 | struct nfs4_lookup_arg args = { | |
2526 | .bitmask = server->attr_bitmask, | |
2527 | .dir_fh = NFS_FH(dir), | |
2528 | .name = name, | |
2529 | }; | |
2530 | struct nfs4_lookup_res res = { | |
2531 | .server = server, | |
2532 | .fattr = fattr, | |
2533 | .fh = fhandle, | |
2534 | }; | |
2535 | struct rpc_message msg = { | |
2536 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2537 | .rpc_argp = &args, | |
2538 | .rpc_resp = &res, | |
2539 | }; | |
2540 | ||
2541 | nfs_fattr_init(fattr); | |
2542 | ||
2543 | dprintk("NFS call lookup %s\n", name->name); | |
2544 | status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2545 | dprintk("NFS reply lookup: %d\n", status); | |
2546 | return status; | |
2547 | } | |
2548 | ||
2549 | static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) | |
2550 | { | |
2551 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
2552 | NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; | |
2553 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
2554 | fattr->nlink = 2; | |
2555 | } | |
2556 | ||
2557 | static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, | |
2558 | struct qstr *name, struct nfs_fh *fhandle, | |
2559 | struct nfs_fattr *fattr) | |
2560 | { | |
2561 | struct nfs4_exception exception = { }; | |
2562 | struct rpc_clnt *client = *clnt; | |
2563 | int err; | |
2564 | do { | |
2565 | err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr); | |
2566 | switch (err) { | |
2567 | case -NFS4ERR_BADNAME: | |
2568 | err = -ENOENT; | |
2569 | goto out; | |
2570 | case -NFS4ERR_MOVED: | |
2571 | err = nfs4_get_referral(client, dir, name, fattr, fhandle); | |
2572 | goto out; | |
2573 | case -NFS4ERR_WRONGSEC: | |
2574 | err = -EPERM; | |
2575 | if (client != *clnt) | |
2576 | goto out; | |
2577 | ||
2578 | client = nfs4_create_sec_client(client, dir, name); | |
2579 | if (IS_ERR(client)) | |
2580 | return PTR_ERR(client); | |
2581 | ||
2582 | exception.retry = 1; | |
2583 | break; | |
2584 | default: | |
2585 | err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); | |
2586 | } | |
2587 | } while (exception.retry); | |
2588 | ||
2589 | out: | |
2590 | if (err == 0) | |
2591 | *clnt = client; | |
2592 | else if (client != *clnt) | |
2593 | rpc_shutdown_client(client); | |
2594 | ||
2595 | return err; | |
2596 | } | |
2597 | ||
2598 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
2599 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2600 | { | |
2601 | int status; | |
2602 | struct rpc_clnt *client = NFS_CLIENT(dir); | |
2603 | ||
2604 | status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); | |
2605 | if (client != NFS_CLIENT(dir)) { | |
2606 | rpc_shutdown_client(client); | |
2607 | nfs_fixup_secinfo_attributes(fattr); | |
2608 | } | |
2609 | return status; | |
2610 | } | |
2611 | ||
2612 | struct rpc_clnt * | |
2613 | nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, | |
2614 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2615 | { | |
2616 | int status; | |
2617 | struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir)); | |
2618 | ||
2619 | status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); | |
2620 | if (status < 0) { | |
2621 | rpc_shutdown_client(client); | |
2622 | return ERR_PTR(status); | |
2623 | } | |
2624 | return client; | |
2625 | } | |
2626 | ||
2627 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2628 | { | |
2629 | struct nfs_server *server = NFS_SERVER(inode); | |
2630 | struct nfs4_accessargs args = { | |
2631 | .fh = NFS_FH(inode), | |
2632 | .bitmask = server->cache_consistency_bitmask, | |
2633 | }; | |
2634 | struct nfs4_accessres res = { | |
2635 | .server = server, | |
2636 | }; | |
2637 | struct rpc_message msg = { | |
2638 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2639 | .rpc_argp = &args, | |
2640 | .rpc_resp = &res, | |
2641 | .rpc_cred = entry->cred, | |
2642 | }; | |
2643 | int mode = entry->mask; | |
2644 | int status; | |
2645 | ||
2646 | /* | |
2647 | * Determine which access bits we want to ask for... | |
2648 | */ | |
2649 | if (mode & MAY_READ) | |
2650 | args.access |= NFS4_ACCESS_READ; | |
2651 | if (S_ISDIR(inode->i_mode)) { | |
2652 | if (mode & MAY_WRITE) | |
2653 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2654 | if (mode & MAY_EXEC) | |
2655 | args.access |= NFS4_ACCESS_LOOKUP; | |
2656 | } else { | |
2657 | if (mode & MAY_WRITE) | |
2658 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2659 | if (mode & MAY_EXEC) | |
2660 | args.access |= NFS4_ACCESS_EXECUTE; | |
2661 | } | |
2662 | ||
2663 | res.fattr = nfs_alloc_fattr(); | |
2664 | if (res.fattr == NULL) | |
2665 | return -ENOMEM; | |
2666 | ||
2667 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2668 | if (!status) { | |
2669 | entry->mask = 0; | |
2670 | if (res.access & NFS4_ACCESS_READ) | |
2671 | entry->mask |= MAY_READ; | |
2672 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2673 | entry->mask |= MAY_WRITE; | |
2674 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2675 | entry->mask |= MAY_EXEC; | |
2676 | nfs_refresh_inode(inode, res.fattr); | |
2677 | } | |
2678 | nfs_free_fattr(res.fattr); | |
2679 | return status; | |
2680 | } | |
2681 | ||
2682 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2683 | { | |
2684 | struct nfs4_exception exception = { }; | |
2685 | int err; | |
2686 | do { | |
2687 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2688 | _nfs4_proc_access(inode, entry), | |
2689 | &exception); | |
2690 | } while (exception.retry); | |
2691 | return err; | |
2692 | } | |
2693 | ||
2694 | /* | |
2695 | * TODO: For the time being, we don't try to get any attributes | |
2696 | * along with any of the zero-copy operations READ, READDIR, | |
2697 | * READLINK, WRITE. | |
2698 | * | |
2699 | * In the case of the first three, we want to put the GETATTR | |
2700 | * after the read-type operation -- this is because it is hard | |
2701 | * to predict the length of a GETATTR response in v4, and thus | |
2702 | * align the READ data correctly. This means that the GETATTR | |
2703 | * may end up partially falling into the page cache, and we should | |
2704 | * shift it into the 'tail' of the xdr_buf before processing. | |
2705 | * To do this efficiently, we need to know the total length | |
2706 | * of data received, which doesn't seem to be available outside | |
2707 | * of the RPC layer. | |
2708 | * | |
2709 | * In the case of WRITE, we also want to put the GETATTR after | |
2710 | * the operation -- in this case because we want to make sure | |
2711 | * we get the post-operation mtime and size. This means that | |
2712 | * we can't use xdr_encode_pages() as written: we need a variant | |
2713 | * of it which would leave room in the 'tail' iovec. | |
2714 | * | |
2715 | * Both of these changes to the XDR layer would in fact be quite | |
2716 | * minor, but I decided to leave them for a subsequent patch. | |
2717 | */ | |
2718 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2719 | unsigned int pgbase, unsigned int pglen) | |
2720 | { | |
2721 | struct nfs4_readlink args = { | |
2722 | .fh = NFS_FH(inode), | |
2723 | .pgbase = pgbase, | |
2724 | .pglen = pglen, | |
2725 | .pages = &page, | |
2726 | }; | |
2727 | struct nfs4_readlink_res res; | |
2728 | struct rpc_message msg = { | |
2729 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2730 | .rpc_argp = &args, | |
2731 | .rpc_resp = &res, | |
2732 | }; | |
2733 | ||
2734 | return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); | |
2735 | } | |
2736 | ||
2737 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2738 | unsigned int pgbase, unsigned int pglen) | |
2739 | { | |
2740 | struct nfs4_exception exception = { }; | |
2741 | int err; | |
2742 | do { | |
2743 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2744 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2745 | &exception); | |
2746 | } while (exception.retry); | |
2747 | return err; | |
2748 | } | |
2749 | ||
2750 | /* | |
2751 | * Got race? | |
2752 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2753 | * Until then, this create/open method is prone to inefficiency and race | |
2754 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2755 | * placed on the wire. | |
2756 | * | |
2757 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2758 | * The file will be opened again in the subsequent VFS open call | |
2759 | * (nfs4_proc_file_open). | |
2760 | * | |
2761 | * The open for read will just hang around to be used by any process that | |
2762 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2763 | */ | |
2764 | ||
2765 | static int | |
2766 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
2767 | int flags, struct nfs_open_context *ctx) | |
2768 | { | |
2769 | struct dentry *de = dentry; | |
2770 | struct nfs4_state *state; | |
2771 | struct rpc_cred *cred = NULL; | |
2772 | fmode_t fmode = 0; | |
2773 | int status = 0; | |
2774 | ||
2775 | if (ctx != NULL) { | |
2776 | cred = ctx->cred; | |
2777 | de = ctx->dentry; | |
2778 | fmode = ctx->mode; | |
2779 | } | |
2780 | sattr->ia_mode &= ~current_umask(); | |
2781 | state = nfs4_do_open(dir, de, fmode, flags, sattr, cred); | |
2782 | d_drop(dentry); | |
2783 | if (IS_ERR(state)) { | |
2784 | status = PTR_ERR(state); | |
2785 | goto out; | |
2786 | } | |
2787 | d_add(dentry, igrab(state->inode)); | |
2788 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
2789 | if (ctx != NULL) | |
2790 | ctx->state = state; | |
2791 | else | |
2792 | nfs4_close_sync(state, fmode); | |
2793 | out: | |
2794 | return status; | |
2795 | } | |
2796 | ||
2797 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2798 | { | |
2799 | struct nfs_server *server = NFS_SERVER(dir); | |
2800 | struct nfs_removeargs args = { | |
2801 | .fh = NFS_FH(dir), | |
2802 | .name.len = name->len, | |
2803 | .name.name = name->name, | |
2804 | }; | |
2805 | struct nfs_removeres res = { | |
2806 | .server = server, | |
2807 | }; | |
2808 | struct rpc_message msg = { | |
2809 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
2810 | .rpc_argp = &args, | |
2811 | .rpc_resp = &res, | |
2812 | }; | |
2813 | int status; | |
2814 | ||
2815 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); | |
2816 | if (status == 0) | |
2817 | update_changeattr(dir, &res.cinfo); | |
2818 | return status; | |
2819 | } | |
2820 | ||
2821 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2822 | { | |
2823 | struct nfs4_exception exception = { }; | |
2824 | int err; | |
2825 | do { | |
2826 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2827 | _nfs4_proc_remove(dir, name), | |
2828 | &exception); | |
2829 | } while (exception.retry); | |
2830 | return err; | |
2831 | } | |
2832 | ||
2833 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) | |
2834 | { | |
2835 | struct nfs_server *server = NFS_SERVER(dir); | |
2836 | struct nfs_removeargs *args = msg->rpc_argp; | |
2837 | struct nfs_removeres *res = msg->rpc_resp; | |
2838 | ||
2839 | res->server = server; | |
2840 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
2841 | nfs41_init_sequence(&args->seq_args, &res->seq_res, 1); | |
2842 | } | |
2843 | ||
2844 | static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) | |
2845 | { | |
2846 | if (nfs4_setup_sequence(NFS_SERVER(data->dir), | |
2847 | &data->args.seq_args, | |
2848 | &data->res.seq_res, | |
2849 | task)) | |
2850 | return; | |
2851 | rpc_call_start(task); | |
2852 | } | |
2853 | ||
2854 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) | |
2855 | { | |
2856 | struct nfs_removeres *res = task->tk_msg.rpc_resp; | |
2857 | ||
2858 | if (!nfs4_sequence_done(task, &res->seq_res)) | |
2859 | return 0; | |
2860 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
2861 | return 0; | |
2862 | update_changeattr(dir, &res->cinfo); | |
2863 | return 1; | |
2864 | } | |
2865 | ||
2866 | static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) | |
2867 | { | |
2868 | struct nfs_server *server = NFS_SERVER(dir); | |
2869 | struct nfs_renameargs *arg = msg->rpc_argp; | |
2870 | struct nfs_renameres *res = msg->rpc_resp; | |
2871 | ||
2872 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; | |
2873 | res->server = server; | |
2874 | nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1); | |
2875 | } | |
2876 | ||
2877 | static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) | |
2878 | { | |
2879 | if (nfs4_setup_sequence(NFS_SERVER(data->old_dir), | |
2880 | &data->args.seq_args, | |
2881 | &data->res.seq_res, | |
2882 | task)) | |
2883 | return; | |
2884 | rpc_call_start(task); | |
2885 | } | |
2886 | ||
2887 | static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, | |
2888 | struct inode *new_dir) | |
2889 | { | |
2890 | struct nfs_renameres *res = task->tk_msg.rpc_resp; | |
2891 | ||
2892 | if (!nfs4_sequence_done(task, &res->seq_res)) | |
2893 | return 0; | |
2894 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
2895 | return 0; | |
2896 | ||
2897 | update_changeattr(old_dir, &res->old_cinfo); | |
2898 | update_changeattr(new_dir, &res->new_cinfo); | |
2899 | return 1; | |
2900 | } | |
2901 | ||
2902 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2903 | struct inode *new_dir, struct qstr *new_name) | |
2904 | { | |
2905 | struct nfs_server *server = NFS_SERVER(old_dir); | |
2906 | struct nfs_renameargs arg = { | |
2907 | .old_dir = NFS_FH(old_dir), | |
2908 | .new_dir = NFS_FH(new_dir), | |
2909 | .old_name = old_name, | |
2910 | .new_name = new_name, | |
2911 | }; | |
2912 | struct nfs_renameres res = { | |
2913 | .server = server, | |
2914 | }; | |
2915 | struct rpc_message msg = { | |
2916 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2917 | .rpc_argp = &arg, | |
2918 | .rpc_resp = &res, | |
2919 | }; | |
2920 | int status = -ENOMEM; | |
2921 | ||
2922 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
2923 | if (!status) { | |
2924 | update_changeattr(old_dir, &res.old_cinfo); | |
2925 | update_changeattr(new_dir, &res.new_cinfo); | |
2926 | } | |
2927 | return status; | |
2928 | } | |
2929 | ||
2930 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2931 | struct inode *new_dir, struct qstr *new_name) | |
2932 | { | |
2933 | struct nfs4_exception exception = { }; | |
2934 | int err; | |
2935 | do { | |
2936 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2937 | _nfs4_proc_rename(old_dir, old_name, | |
2938 | new_dir, new_name), | |
2939 | &exception); | |
2940 | } while (exception.retry); | |
2941 | return err; | |
2942 | } | |
2943 | ||
2944 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2945 | { | |
2946 | struct nfs_server *server = NFS_SERVER(inode); | |
2947 | struct nfs4_link_arg arg = { | |
2948 | .fh = NFS_FH(inode), | |
2949 | .dir_fh = NFS_FH(dir), | |
2950 | .name = name, | |
2951 | .bitmask = server->attr_bitmask, | |
2952 | }; | |
2953 | struct nfs4_link_res res = { | |
2954 | .server = server, | |
2955 | }; | |
2956 | struct rpc_message msg = { | |
2957 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2958 | .rpc_argp = &arg, | |
2959 | .rpc_resp = &res, | |
2960 | }; | |
2961 | int status = -ENOMEM; | |
2962 | ||
2963 | res.fattr = nfs_alloc_fattr(); | |
2964 | if (res.fattr == NULL) | |
2965 | goto out; | |
2966 | ||
2967 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
2968 | if (!status) { | |
2969 | update_changeattr(dir, &res.cinfo); | |
2970 | nfs_post_op_update_inode(inode, res.fattr); | |
2971 | } | |
2972 | out: | |
2973 | nfs_free_fattr(res.fattr); | |
2974 | return status; | |
2975 | } | |
2976 | ||
2977 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2978 | { | |
2979 | struct nfs4_exception exception = { }; | |
2980 | int err; | |
2981 | do { | |
2982 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2983 | _nfs4_proc_link(inode, dir, name), | |
2984 | &exception); | |
2985 | } while (exception.retry); | |
2986 | return err; | |
2987 | } | |
2988 | ||
2989 | struct nfs4_createdata { | |
2990 | struct rpc_message msg; | |
2991 | struct nfs4_create_arg arg; | |
2992 | struct nfs4_create_res res; | |
2993 | struct nfs_fh fh; | |
2994 | struct nfs_fattr fattr; | |
2995 | }; | |
2996 | ||
2997 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2998 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2999 | { | |
3000 | struct nfs4_createdata *data; | |
3001 | ||
3002 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
3003 | if (data != NULL) { | |
3004 | struct nfs_server *server = NFS_SERVER(dir); | |
3005 | ||
3006 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
3007 | data->msg.rpc_argp = &data->arg; | |
3008 | data->msg.rpc_resp = &data->res; | |
3009 | data->arg.dir_fh = NFS_FH(dir); | |
3010 | data->arg.server = server; | |
3011 | data->arg.name = name; | |
3012 | data->arg.attrs = sattr; | |
3013 | data->arg.ftype = ftype; | |
3014 | data->arg.bitmask = server->attr_bitmask; | |
3015 | data->res.server = server; | |
3016 | data->res.fh = &data->fh; | |
3017 | data->res.fattr = &data->fattr; | |
3018 | nfs_fattr_init(data->res.fattr); | |
3019 | } | |
3020 | return data; | |
3021 | } | |
3022 | ||
3023 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
3024 | { | |
3025 | int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, | |
3026 | &data->arg.seq_args, &data->res.seq_res, 1); | |
3027 | if (status == 0) { | |
3028 | update_changeattr(dir, &data->res.dir_cinfo); | |
3029 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
3030 | } | |
3031 | return status; | |
3032 | } | |
3033 | ||
3034 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
3035 | { | |
3036 | kfree(data); | |
3037 | } | |
3038 | ||
3039 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
3040 | struct page *page, unsigned int len, struct iattr *sattr) | |
3041 | { | |
3042 | struct nfs4_createdata *data; | |
3043 | int status = -ENAMETOOLONG; | |
3044 | ||
3045 | if (len > NFS4_MAXPATHLEN) | |
3046 | goto out; | |
3047 | ||
3048 | status = -ENOMEM; | |
3049 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
3050 | if (data == NULL) | |
3051 | goto out; | |
3052 | ||
3053 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
3054 | data->arg.u.symlink.pages = &page; | |
3055 | data->arg.u.symlink.len = len; | |
3056 | ||
3057 | status = nfs4_do_create(dir, dentry, data); | |
3058 | ||
3059 | nfs4_free_createdata(data); | |
3060 | out: | |
3061 | return status; | |
3062 | } | |
3063 | ||
3064 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
3065 | struct page *page, unsigned int len, struct iattr *sattr) | |
3066 | { | |
3067 | struct nfs4_exception exception = { }; | |
3068 | int err; | |
3069 | do { | |
3070 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3071 | _nfs4_proc_symlink(dir, dentry, page, | |
3072 | len, sattr), | |
3073 | &exception); | |
3074 | } while (exception.retry); | |
3075 | return err; | |
3076 | } | |
3077 | ||
3078 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
3079 | struct iattr *sattr) | |
3080 | { | |
3081 | struct nfs4_createdata *data; | |
3082 | int status = -ENOMEM; | |
3083 | ||
3084 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); | |
3085 | if (data == NULL) | |
3086 | goto out; | |
3087 | ||
3088 | status = nfs4_do_create(dir, dentry, data); | |
3089 | ||
3090 | nfs4_free_createdata(data); | |
3091 | out: | |
3092 | return status; | |
3093 | } | |
3094 | ||
3095 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
3096 | struct iattr *sattr) | |
3097 | { | |
3098 | struct nfs4_exception exception = { }; | |
3099 | int err; | |
3100 | ||
3101 | sattr->ia_mode &= ~current_umask(); | |
3102 | do { | |
3103 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3104 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
3105 | &exception); | |
3106 | } while (exception.retry); | |
3107 | return err; | |
3108 | } | |
3109 | ||
3110 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
3111 | u64 cookie, struct page **pages, unsigned int count, int plus) | |
3112 | { | |
3113 | struct inode *dir = dentry->d_inode; | |
3114 | struct nfs4_readdir_arg args = { | |
3115 | .fh = NFS_FH(dir), | |
3116 | .pages = pages, | |
3117 | .pgbase = 0, | |
3118 | .count = count, | |
3119 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
3120 | .plus = plus, | |
3121 | }; | |
3122 | struct nfs4_readdir_res res; | |
3123 | struct rpc_message msg = { | |
3124 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
3125 | .rpc_argp = &args, | |
3126 | .rpc_resp = &res, | |
3127 | .rpc_cred = cred, | |
3128 | }; | |
3129 | int status; | |
3130 | ||
3131 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, | |
3132 | dentry->d_parent->d_name.name, | |
3133 | dentry->d_name.name, | |
3134 | (unsigned long long)cookie); | |
3135 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
3136 | res.pgbase = args.pgbase; | |
3137 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); | |
3138 | if (status >= 0) { | |
3139 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
3140 | status += args.pgbase; | |
3141 | } | |
3142 | ||
3143 | nfs_invalidate_atime(dir); | |
3144 | ||
3145 | dprintk("%s: returns %d\n", __func__, status); | |
3146 | return status; | |
3147 | } | |
3148 | ||
3149 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
3150 | u64 cookie, struct page **pages, unsigned int count, int plus) | |
3151 | { | |
3152 | struct nfs4_exception exception = { }; | |
3153 | int err; | |
3154 | do { | |
3155 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
3156 | _nfs4_proc_readdir(dentry, cred, cookie, | |
3157 | pages, count, plus), | |
3158 | &exception); | |
3159 | } while (exception.retry); | |
3160 | return err; | |
3161 | } | |
3162 | ||
3163 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
3164 | struct iattr *sattr, dev_t rdev) | |
3165 | { | |
3166 | struct nfs4_createdata *data; | |
3167 | int mode = sattr->ia_mode; | |
3168 | int status = -ENOMEM; | |
3169 | ||
3170 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
3171 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
3172 | ||
3173 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
3174 | if (data == NULL) | |
3175 | goto out; | |
3176 | ||
3177 | if (S_ISFIFO(mode)) | |
3178 | data->arg.ftype = NF4FIFO; | |
3179 | else if (S_ISBLK(mode)) { | |
3180 | data->arg.ftype = NF4BLK; | |
3181 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
3182 | data->arg.u.device.specdata2 = MINOR(rdev); | |
3183 | } | |
3184 | else if (S_ISCHR(mode)) { | |
3185 | data->arg.ftype = NF4CHR; | |
3186 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
3187 | data->arg.u.device.specdata2 = MINOR(rdev); | |
3188 | } | |
3189 | ||
3190 | status = nfs4_do_create(dir, dentry, data); | |
3191 | ||
3192 | nfs4_free_createdata(data); | |
3193 | out: | |
3194 | return status; | |
3195 | } | |
3196 | ||
3197 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
3198 | struct iattr *sattr, dev_t rdev) | |
3199 | { | |
3200 | struct nfs4_exception exception = { }; | |
3201 | int err; | |
3202 | ||
3203 | sattr->ia_mode &= ~current_umask(); | |
3204 | do { | |
3205 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3206 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
3207 | &exception); | |
3208 | } while (exception.retry); | |
3209 | return err; | |
3210 | } | |
3211 | ||
3212 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
3213 | struct nfs_fsstat *fsstat) | |
3214 | { | |
3215 | struct nfs4_statfs_arg args = { | |
3216 | .fh = fhandle, | |
3217 | .bitmask = server->attr_bitmask, | |
3218 | }; | |
3219 | struct nfs4_statfs_res res = { | |
3220 | .fsstat = fsstat, | |
3221 | }; | |
3222 | struct rpc_message msg = { | |
3223 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
3224 | .rpc_argp = &args, | |
3225 | .rpc_resp = &res, | |
3226 | }; | |
3227 | ||
3228 | nfs_fattr_init(fsstat->fattr); | |
3229 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3230 | } | |
3231 | ||
3232 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
3233 | { | |
3234 | struct nfs4_exception exception = { }; | |
3235 | int err; | |
3236 | do { | |
3237 | err = nfs4_handle_exception(server, | |
3238 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
3239 | &exception); | |
3240 | } while (exception.retry); | |
3241 | return err; | |
3242 | } | |
3243 | ||
3244 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
3245 | struct nfs_fsinfo *fsinfo) | |
3246 | { | |
3247 | struct nfs4_fsinfo_arg args = { | |
3248 | .fh = fhandle, | |
3249 | .bitmask = server->attr_bitmask, | |
3250 | }; | |
3251 | struct nfs4_fsinfo_res res = { | |
3252 | .fsinfo = fsinfo, | |
3253 | }; | |
3254 | struct rpc_message msg = { | |
3255 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
3256 | .rpc_argp = &args, | |
3257 | .rpc_resp = &res, | |
3258 | }; | |
3259 | ||
3260 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3261 | } | |
3262 | ||
3263 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3264 | { | |
3265 | struct nfs4_exception exception = { }; | |
3266 | int err; | |
3267 | ||
3268 | do { | |
3269 | err = nfs4_handle_exception(server, | |
3270 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
3271 | &exception); | |
3272 | } while (exception.retry); | |
3273 | return err; | |
3274 | } | |
3275 | ||
3276 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3277 | { | |
3278 | nfs_fattr_init(fsinfo->fattr); | |
3279 | return nfs4_do_fsinfo(server, fhandle, fsinfo); | |
3280 | } | |
3281 | ||
3282 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3283 | struct nfs_pathconf *pathconf) | |
3284 | { | |
3285 | struct nfs4_pathconf_arg args = { | |
3286 | .fh = fhandle, | |
3287 | .bitmask = server->attr_bitmask, | |
3288 | }; | |
3289 | struct nfs4_pathconf_res res = { | |
3290 | .pathconf = pathconf, | |
3291 | }; | |
3292 | struct rpc_message msg = { | |
3293 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
3294 | .rpc_argp = &args, | |
3295 | .rpc_resp = &res, | |
3296 | }; | |
3297 | ||
3298 | /* None of the pathconf attributes are mandatory to implement */ | |
3299 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
3300 | memset(pathconf, 0, sizeof(*pathconf)); | |
3301 | return 0; | |
3302 | } | |
3303 | ||
3304 | nfs_fattr_init(pathconf->fattr); | |
3305 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3306 | } | |
3307 | ||
3308 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3309 | struct nfs_pathconf *pathconf) | |
3310 | { | |
3311 | struct nfs4_exception exception = { }; | |
3312 | int err; | |
3313 | ||
3314 | do { | |
3315 | err = nfs4_handle_exception(server, | |
3316 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
3317 | &exception); | |
3318 | } while (exception.retry); | |
3319 | return err; | |
3320 | } | |
3321 | ||
3322 | void __nfs4_read_done_cb(struct nfs_read_data *data) | |
3323 | { | |
3324 | nfs_invalidate_atime(data->header->inode); | |
3325 | } | |
3326 | ||
3327 | static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data) | |
3328 | { | |
3329 | struct nfs_server *server = NFS_SERVER(data->header->inode); | |
3330 | ||
3331 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { | |
3332 | rpc_restart_call_prepare(task); | |
3333 | return -EAGAIN; | |
3334 | } | |
3335 | ||
3336 | __nfs4_read_done_cb(data); | |
3337 | if (task->tk_status > 0) | |
3338 | renew_lease(server, data->timestamp); | |
3339 | return 0; | |
3340 | } | |
3341 | ||
3342 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) | |
3343 | { | |
3344 | ||
3345 | dprintk("--> %s\n", __func__); | |
3346 | ||
3347 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3348 | return -EAGAIN; | |
3349 | ||
3350 | return data->read_done_cb ? data->read_done_cb(task, data) : | |
3351 | nfs4_read_done_cb(task, data); | |
3352 | } | |
3353 | ||
3354 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) | |
3355 | { | |
3356 | data->timestamp = jiffies; | |
3357 | data->read_done_cb = nfs4_read_done_cb; | |
3358 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; | |
3359 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); | |
3360 | } | |
3361 | ||
3362 | static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) | |
3363 | { | |
3364 | if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), | |
3365 | &data->args.seq_args, | |
3366 | &data->res.seq_res, | |
3367 | task)) | |
3368 | return; | |
3369 | rpc_call_start(task); | |
3370 | } | |
3371 | ||
3372 | static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) | |
3373 | { | |
3374 | struct inode *inode = data->header->inode; | |
3375 | ||
3376 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { | |
3377 | rpc_restart_call_prepare(task); | |
3378 | return -EAGAIN; | |
3379 | } | |
3380 | if (task->tk_status >= 0) { | |
3381 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
3382 | nfs_post_op_update_inode_force_wcc(inode, &data->fattr); | |
3383 | } | |
3384 | return 0; | |
3385 | } | |
3386 | ||
3387 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) | |
3388 | { | |
3389 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3390 | return -EAGAIN; | |
3391 | return data->write_done_cb ? data->write_done_cb(task, data) : | |
3392 | nfs4_write_done_cb(task, data); | |
3393 | } | |
3394 | ||
3395 | static | |
3396 | bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data) | |
3397 | { | |
3398 | const struct nfs_pgio_header *hdr = data->header; | |
3399 | ||
3400 | /* Don't request attributes for pNFS or O_DIRECT writes */ | |
3401 | if (data->ds_clp != NULL || hdr->dreq != NULL) | |
3402 | return false; | |
3403 | /* Otherwise, request attributes if and only if we don't hold | |
3404 | * a delegation | |
3405 | */ | |
3406 | return nfs_have_delegation(hdr->inode, FMODE_READ) == 0; | |
3407 | } | |
3408 | ||
3409 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) | |
3410 | { | |
3411 | struct nfs_server *server = NFS_SERVER(data->header->inode); | |
3412 | ||
3413 | if (!nfs4_write_need_cache_consistency_data(data)) { | |
3414 | data->args.bitmask = NULL; | |
3415 | data->res.fattr = NULL; | |
3416 | } else | |
3417 | data->args.bitmask = server->cache_consistency_bitmask; | |
3418 | ||
3419 | if (!data->write_done_cb) | |
3420 | data->write_done_cb = nfs4_write_done_cb; | |
3421 | data->res.server = server; | |
3422 | data->timestamp = jiffies; | |
3423 | ||
3424 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; | |
3425 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
3426 | } | |
3427 | ||
3428 | static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) | |
3429 | { | |
3430 | if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), | |
3431 | &data->args.seq_args, | |
3432 | &data->res.seq_res, | |
3433 | task)) | |
3434 | return; | |
3435 | rpc_call_start(task); | |
3436 | } | |
3437 | ||
3438 | static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) | |
3439 | { | |
3440 | if (nfs4_setup_sequence(NFS_SERVER(data->inode), | |
3441 | &data->args.seq_args, | |
3442 | &data->res.seq_res, | |
3443 | task)) | |
3444 | return; | |
3445 | rpc_call_start(task); | |
3446 | } | |
3447 | ||
3448 | static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) | |
3449 | { | |
3450 | struct inode *inode = data->inode; | |
3451 | ||
3452 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { | |
3453 | rpc_restart_call_prepare(task); | |
3454 | return -EAGAIN; | |
3455 | } | |
3456 | return 0; | |
3457 | } | |
3458 | ||
3459 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) | |
3460 | { | |
3461 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3462 | return -EAGAIN; | |
3463 | return data->commit_done_cb(task, data); | |
3464 | } | |
3465 | ||
3466 | static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) | |
3467 | { | |
3468 | struct nfs_server *server = NFS_SERVER(data->inode); | |
3469 | ||
3470 | if (data->commit_done_cb == NULL) | |
3471 | data->commit_done_cb = nfs4_commit_done_cb; | |
3472 | data->res.server = server; | |
3473 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; | |
3474 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
3475 | } | |
3476 | ||
3477 | struct nfs4_renewdata { | |
3478 | struct nfs_client *client; | |
3479 | unsigned long timestamp; | |
3480 | }; | |
3481 | ||
3482 | /* | |
3483 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3484 | * standalone procedure for queueing an asynchronous RENEW. | |
3485 | */ | |
3486 | static void nfs4_renew_release(void *calldata) | |
3487 | { | |
3488 | struct nfs4_renewdata *data = calldata; | |
3489 | struct nfs_client *clp = data->client; | |
3490 | ||
3491 | if (atomic_read(&clp->cl_count) > 1) | |
3492 | nfs4_schedule_state_renewal(clp); | |
3493 | nfs_put_client(clp); | |
3494 | kfree(data); | |
3495 | } | |
3496 | ||
3497 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) | |
3498 | { | |
3499 | struct nfs4_renewdata *data = calldata; | |
3500 | struct nfs_client *clp = data->client; | |
3501 | unsigned long timestamp = data->timestamp; | |
3502 | ||
3503 | if (task->tk_status < 0) { | |
3504 | /* Unless we're shutting down, schedule state recovery! */ | |
3505 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) | |
3506 | return; | |
3507 | if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { | |
3508 | nfs4_schedule_lease_recovery(clp); | |
3509 | return; | |
3510 | } | |
3511 | nfs4_schedule_path_down_recovery(clp); | |
3512 | } | |
3513 | do_renew_lease(clp, timestamp); | |
3514 | } | |
3515 | ||
3516 | static const struct rpc_call_ops nfs4_renew_ops = { | |
3517 | .rpc_call_done = nfs4_renew_done, | |
3518 | .rpc_release = nfs4_renew_release, | |
3519 | }; | |
3520 | ||
3521 | static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) | |
3522 | { | |
3523 | struct rpc_message msg = { | |
3524 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3525 | .rpc_argp = clp, | |
3526 | .rpc_cred = cred, | |
3527 | }; | |
3528 | struct nfs4_renewdata *data; | |
3529 | ||
3530 | if (renew_flags == 0) | |
3531 | return 0; | |
3532 | if (!atomic_inc_not_zero(&clp->cl_count)) | |
3533 | return -EIO; | |
3534 | data = kmalloc(sizeof(*data), GFP_NOFS); | |
3535 | if (data == NULL) | |
3536 | return -ENOMEM; | |
3537 | data->client = clp; | |
3538 | data->timestamp = jiffies; | |
3539 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
3540 | &nfs4_renew_ops, data); | |
3541 | } | |
3542 | ||
3543 | static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) | |
3544 | { | |
3545 | struct rpc_message msg = { | |
3546 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3547 | .rpc_argp = clp, | |
3548 | .rpc_cred = cred, | |
3549 | }; | |
3550 | unsigned long now = jiffies; | |
3551 | int status; | |
3552 | ||
3553 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3554 | if (status < 0) | |
3555 | return status; | |
3556 | do_renew_lease(clp, now); | |
3557 | return 0; | |
3558 | } | |
3559 | ||
3560 | static inline int nfs4_server_supports_acls(struct nfs_server *server) | |
3561 | { | |
3562 | return (server->caps & NFS_CAP_ACLS) | |
3563 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3564 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3565 | } | |
3566 | ||
3567 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3568 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3569 | * the stack. | |
3570 | */ | |
3571 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3572 | ||
3573 | static int buf_to_pages_noslab(const void *buf, size_t buflen, | |
3574 | struct page **pages, unsigned int *pgbase) | |
3575 | { | |
3576 | struct page *newpage, **spages; | |
3577 | int rc = 0; | |
3578 | size_t len; | |
3579 | spages = pages; | |
3580 | ||
3581 | do { | |
3582 | len = min_t(size_t, PAGE_CACHE_SIZE, buflen); | |
3583 | newpage = alloc_page(GFP_KERNEL); | |
3584 | ||
3585 | if (newpage == NULL) | |
3586 | goto unwind; | |
3587 | memcpy(page_address(newpage), buf, len); | |
3588 | buf += len; | |
3589 | buflen -= len; | |
3590 | *pages++ = newpage; | |
3591 | rc++; | |
3592 | } while (buflen != 0); | |
3593 | ||
3594 | return rc; | |
3595 | ||
3596 | unwind: | |
3597 | for(; rc > 0; rc--) | |
3598 | __free_page(spages[rc-1]); | |
3599 | return -ENOMEM; | |
3600 | } | |
3601 | ||
3602 | struct nfs4_cached_acl { | |
3603 | int cached; | |
3604 | size_t len; | |
3605 | char data[0]; | |
3606 | }; | |
3607 | ||
3608 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3609 | { | |
3610 | struct nfs_inode *nfsi = NFS_I(inode); | |
3611 | ||
3612 | spin_lock(&inode->i_lock); | |
3613 | kfree(nfsi->nfs4_acl); | |
3614 | nfsi->nfs4_acl = acl; | |
3615 | spin_unlock(&inode->i_lock); | |
3616 | } | |
3617 | ||
3618 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3619 | { | |
3620 | nfs4_set_cached_acl(inode, NULL); | |
3621 | } | |
3622 | ||
3623 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3624 | { | |
3625 | struct nfs_inode *nfsi = NFS_I(inode); | |
3626 | struct nfs4_cached_acl *acl; | |
3627 | int ret = -ENOENT; | |
3628 | ||
3629 | spin_lock(&inode->i_lock); | |
3630 | acl = nfsi->nfs4_acl; | |
3631 | if (acl == NULL) | |
3632 | goto out; | |
3633 | if (buf == NULL) /* user is just asking for length */ | |
3634 | goto out_len; | |
3635 | if (acl->cached == 0) | |
3636 | goto out; | |
3637 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3638 | if (acl->len > buflen) | |
3639 | goto out; | |
3640 | memcpy(buf, acl->data, acl->len); | |
3641 | out_len: | |
3642 | ret = acl->len; | |
3643 | out: | |
3644 | spin_unlock(&inode->i_lock); | |
3645 | return ret; | |
3646 | } | |
3647 | ||
3648 | static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) | |
3649 | { | |
3650 | struct nfs4_cached_acl *acl; | |
3651 | ||
3652 | if (pages && acl_len <= PAGE_SIZE) { | |
3653 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3654 | if (acl == NULL) | |
3655 | goto out; | |
3656 | acl->cached = 1; | |
3657 | _copy_from_pages(acl->data, pages, pgbase, acl_len); | |
3658 | } else { | |
3659 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3660 | if (acl == NULL) | |
3661 | goto out; | |
3662 | acl->cached = 0; | |
3663 | } | |
3664 | acl->len = acl_len; | |
3665 | out: | |
3666 | nfs4_set_cached_acl(inode, acl); | |
3667 | } | |
3668 | ||
3669 | /* | |
3670 | * The getxattr API returns the required buffer length when called with a | |
3671 | * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating | |
3672 | * the required buf. On a NULL buf, we send a page of data to the server | |
3673 | * guessing that the ACL request can be serviced by a page. If so, we cache | |
3674 | * up to the page of ACL data, and the 2nd call to getxattr is serviced by | |
3675 | * the cache. If not so, we throw away the page, and cache the required | |
3676 | * length. The next getxattr call will then produce another round trip to | |
3677 | * the server, this time with the input buf of the required size. | |
3678 | */ | |
3679 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3680 | { | |
3681 | struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; | |
3682 | struct nfs_getaclargs args = { | |
3683 | .fh = NFS_FH(inode), | |
3684 | .acl_pages = pages, | |
3685 | .acl_len = buflen, | |
3686 | }; | |
3687 | struct nfs_getaclres res = { | |
3688 | .acl_len = buflen, | |
3689 | }; | |
3690 | struct rpc_message msg = { | |
3691 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3692 | .rpc_argp = &args, | |
3693 | .rpc_resp = &res, | |
3694 | }; | |
3695 | int ret = -ENOMEM, npages, i, acl_len = 0; | |
3696 | ||
3697 | npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; | |
3698 | /* As long as we're doing a round trip to the server anyway, | |
3699 | * let's be prepared for a page of acl data. */ | |
3700 | if (npages == 0) | |
3701 | npages = 1; | |
3702 | ||
3703 | /* Add an extra page to handle the bitmap returned */ | |
3704 | npages++; | |
3705 | ||
3706 | for (i = 0; i < npages; i++) { | |
3707 | pages[i] = alloc_page(GFP_KERNEL); | |
3708 | if (!pages[i]) | |
3709 | goto out_free; | |
3710 | } | |
3711 | ||
3712 | /* for decoding across pages */ | |
3713 | res.acl_scratch = alloc_page(GFP_KERNEL); | |
3714 | if (!res.acl_scratch) | |
3715 | goto out_free; | |
3716 | ||
3717 | args.acl_len = npages * PAGE_SIZE; | |
3718 | args.acl_pgbase = 0; | |
3719 | ||
3720 | /* Let decode_getfacl know not to fail if the ACL data is larger than | |
3721 | * the page we send as a guess */ | |
3722 | if (buf == NULL) | |
3723 | res.acl_flags |= NFS4_ACL_LEN_REQUEST; | |
3724 | ||
3725 | dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", | |
3726 | __func__, buf, buflen, npages, args.acl_len); | |
3727 | ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), | |
3728 | &msg, &args.seq_args, &res.seq_res, 0); | |
3729 | if (ret) | |
3730 | goto out_free; | |
3731 | ||
3732 | acl_len = res.acl_len - res.acl_data_offset; | |
3733 | if (acl_len > args.acl_len) | |
3734 | nfs4_write_cached_acl(inode, NULL, 0, acl_len); | |
3735 | else | |
3736 | nfs4_write_cached_acl(inode, pages, res.acl_data_offset, | |
3737 | acl_len); | |
3738 | if (buf) { | |
3739 | ret = -ERANGE; | |
3740 | if (acl_len > buflen) | |
3741 | goto out_free; | |
3742 | _copy_from_pages(buf, pages, res.acl_data_offset, | |
3743 | acl_len); | |
3744 | } | |
3745 | ret = acl_len; | |
3746 | out_free: | |
3747 | for (i = 0; i < npages; i++) | |
3748 | if (pages[i]) | |
3749 | __free_page(pages[i]); | |
3750 | if (res.acl_scratch) | |
3751 | __free_page(res.acl_scratch); | |
3752 | return ret; | |
3753 | } | |
3754 | ||
3755 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3756 | { | |
3757 | struct nfs4_exception exception = { }; | |
3758 | ssize_t ret; | |
3759 | do { | |
3760 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3761 | if (ret >= 0) | |
3762 | break; | |
3763 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3764 | } while (exception.retry); | |
3765 | return ret; | |
3766 | } | |
3767 | ||
3768 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) | |
3769 | { | |
3770 | struct nfs_server *server = NFS_SERVER(inode); | |
3771 | int ret; | |
3772 | ||
3773 | if (!nfs4_server_supports_acls(server)) | |
3774 | return -EOPNOTSUPP; | |
3775 | ret = nfs_revalidate_inode(server, inode); | |
3776 | if (ret < 0) | |
3777 | return ret; | |
3778 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) | |
3779 | nfs_zap_acl_cache(inode); | |
3780 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3781 | if (ret != -ENOENT) | |
3782 | /* -ENOENT is returned if there is no ACL or if there is an ACL | |
3783 | * but no cached acl data, just the acl length */ | |
3784 | return ret; | |
3785 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3786 | } | |
3787 | ||
3788 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3789 | { | |
3790 | struct nfs_server *server = NFS_SERVER(inode); | |
3791 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3792 | struct nfs_setaclargs arg = { | |
3793 | .fh = NFS_FH(inode), | |
3794 | .acl_pages = pages, | |
3795 | .acl_len = buflen, | |
3796 | }; | |
3797 | struct nfs_setaclres res; | |
3798 | struct rpc_message msg = { | |
3799 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3800 | .rpc_argp = &arg, | |
3801 | .rpc_resp = &res, | |
3802 | }; | |
3803 | int ret, i; | |
3804 | ||
3805 | if (!nfs4_server_supports_acls(server)) | |
3806 | return -EOPNOTSUPP; | |
3807 | i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); | |
3808 | if (i < 0) | |
3809 | return i; | |
3810 | nfs_inode_return_delegation(inode); | |
3811 | ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
3812 | ||
3813 | /* | |
3814 | * Free each page after tx, so the only ref left is | |
3815 | * held by the network stack | |
3816 | */ | |
3817 | for (; i > 0; i--) | |
3818 | put_page(pages[i-1]); | |
3819 | ||
3820 | /* | |
3821 | * Acl update can result in inode attribute update. | |
3822 | * so mark the attribute cache invalid. | |
3823 | */ | |
3824 | spin_lock(&inode->i_lock); | |
3825 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
3826 | spin_unlock(&inode->i_lock); | |
3827 | nfs_access_zap_cache(inode); | |
3828 | nfs_zap_acl_cache(inode); | |
3829 | return ret; | |
3830 | } | |
3831 | ||
3832 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3833 | { | |
3834 | struct nfs4_exception exception = { }; | |
3835 | int err; | |
3836 | do { | |
3837 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3838 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3839 | &exception); | |
3840 | } while (exception.retry); | |
3841 | return err; | |
3842 | } | |
3843 | ||
3844 | static int | |
3845 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) | |
3846 | { | |
3847 | struct nfs_client *clp = server->nfs_client; | |
3848 | ||
3849 | if (task->tk_status >= 0) | |
3850 | return 0; | |
3851 | switch(task->tk_status) { | |
3852 | case -NFS4ERR_DELEG_REVOKED: | |
3853 | case -NFS4ERR_ADMIN_REVOKED: | |
3854 | case -NFS4ERR_BAD_STATEID: | |
3855 | if (state == NULL) | |
3856 | break; | |
3857 | nfs_remove_bad_delegation(state->inode); | |
3858 | case -NFS4ERR_OPENMODE: | |
3859 | if (state == NULL) | |
3860 | break; | |
3861 | nfs4_schedule_stateid_recovery(server, state); | |
3862 | goto wait_on_recovery; | |
3863 | case -NFS4ERR_EXPIRED: | |
3864 | if (state != NULL) | |
3865 | nfs4_schedule_stateid_recovery(server, state); | |
3866 | case -NFS4ERR_STALE_STATEID: | |
3867 | case -NFS4ERR_STALE_CLIENTID: | |
3868 | nfs4_schedule_lease_recovery(clp); | |
3869 | goto wait_on_recovery; | |
3870 | #if defined(CONFIG_NFS_V4_1) | |
3871 | case -NFS4ERR_BADSESSION: | |
3872 | case -NFS4ERR_BADSLOT: | |
3873 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3874 | case -NFS4ERR_DEADSESSION: | |
3875 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3876 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3877 | case -NFS4ERR_SEQ_MISORDERED: | |
3878 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3879 | task->tk_status); | |
3880 | nfs4_schedule_session_recovery(clp->cl_session); | |
3881 | task->tk_status = 0; | |
3882 | return -EAGAIN; | |
3883 | #endif /* CONFIG_NFS_V4_1 */ | |
3884 | case -NFS4ERR_DELAY: | |
3885 | nfs_inc_server_stats(server, NFSIOS_DELAY); | |
3886 | case -NFS4ERR_GRACE: | |
3887 | case -EKEYEXPIRED: | |
3888 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
3889 | task->tk_status = 0; | |
3890 | return -EAGAIN; | |
3891 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
3892 | case -NFS4ERR_OLD_STATEID: | |
3893 | task->tk_status = 0; | |
3894 | return -EAGAIN; | |
3895 | } | |
3896 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3897 | return 0; | |
3898 | wait_on_recovery: | |
3899 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3900 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3901 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3902 | task->tk_status = 0; | |
3903 | return -EAGAIN; | |
3904 | } | |
3905 | ||
3906 | static void nfs4_construct_boot_verifier(struct nfs_client *clp, | |
3907 | nfs4_verifier *bootverf) | |
3908 | { | |
3909 | __be32 verf[2]; | |
3910 | ||
3911 | verf[0] = (__be32)clp->cl_boot_time.tv_sec; | |
3912 | verf[1] = (__be32)clp->cl_boot_time.tv_nsec; | |
3913 | memcpy(bootverf->data, verf, sizeof(bootverf->data)); | |
3914 | } | |
3915 | ||
3916 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, | |
3917 | unsigned short port, struct rpc_cred *cred, | |
3918 | struct nfs4_setclientid_res *res) | |
3919 | { | |
3920 | nfs4_verifier sc_verifier; | |
3921 | struct nfs4_setclientid setclientid = { | |
3922 | .sc_verifier = &sc_verifier, | |
3923 | .sc_prog = program, | |
3924 | .sc_cb_ident = clp->cl_cb_ident, | |
3925 | }; | |
3926 | struct rpc_message msg = { | |
3927 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3928 | .rpc_argp = &setclientid, | |
3929 | .rpc_resp = res, | |
3930 | .rpc_cred = cred, | |
3931 | }; | |
3932 | int loop = 0; | |
3933 | int status; | |
3934 | ||
3935 | nfs4_construct_boot_verifier(clp, &sc_verifier); | |
3936 | ||
3937 | for(;;) { | |
3938 | rcu_read_lock(); | |
3939 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
3940 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", | |
3941 | clp->cl_ipaddr, | |
3942 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3943 | RPC_DISPLAY_ADDR), | |
3944 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3945 | RPC_DISPLAY_PROTO), | |
3946 | clp->cl_rpcclient->cl_auth->au_ops->au_name, | |
3947 | clp->cl_id_uniquifier); | |
3948 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
3949 | sizeof(setclientid.sc_netid), | |
3950 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3951 | RPC_DISPLAY_NETID)); | |
3952 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
3953 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", | |
3954 | clp->cl_ipaddr, port >> 8, port & 255); | |
3955 | rcu_read_unlock(); | |
3956 | ||
3957 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
3958 | if (status != -NFS4ERR_CLID_INUSE) | |
3959 | break; | |
3960 | if (loop != 0) { | |
3961 | ++clp->cl_id_uniquifier; | |
3962 | break; | |
3963 | } | |
3964 | ++loop; | |
3965 | ssleep(clp->cl_lease_time / HZ + 1); | |
3966 | } | |
3967 | return status; | |
3968 | } | |
3969 | ||
3970 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, | |
3971 | struct nfs4_setclientid_res *arg, | |
3972 | struct rpc_cred *cred) | |
3973 | { | |
3974 | struct nfs_fsinfo fsinfo; | |
3975 | struct rpc_message msg = { | |
3976 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3977 | .rpc_argp = arg, | |
3978 | .rpc_resp = &fsinfo, | |
3979 | .rpc_cred = cred, | |
3980 | }; | |
3981 | unsigned long now; | |
3982 | int status; | |
3983 | ||
3984 | now = jiffies; | |
3985 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
3986 | if (status == 0) { | |
3987 | spin_lock(&clp->cl_lock); | |
3988 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3989 | clp->cl_last_renewal = now; | |
3990 | spin_unlock(&clp->cl_lock); | |
3991 | } | |
3992 | return status; | |
3993 | } | |
3994 | ||
3995 | struct nfs4_delegreturndata { | |
3996 | struct nfs4_delegreturnargs args; | |
3997 | struct nfs4_delegreturnres res; | |
3998 | struct nfs_fh fh; | |
3999 | nfs4_stateid stateid; | |
4000 | unsigned long timestamp; | |
4001 | struct nfs_fattr fattr; | |
4002 | int rpc_status; | |
4003 | }; | |
4004 | ||
4005 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) | |
4006 | { | |
4007 | struct nfs4_delegreturndata *data = calldata; | |
4008 | ||
4009 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
4010 | return; | |
4011 | ||
4012 | switch (task->tk_status) { | |
4013 | case -NFS4ERR_STALE_STATEID: | |
4014 | case -NFS4ERR_EXPIRED: | |
4015 | case 0: | |
4016 | renew_lease(data->res.server, data->timestamp); | |
4017 | break; | |
4018 | default: | |
4019 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
4020 | -EAGAIN) { | |
4021 | rpc_restart_call_prepare(task); | |
4022 | return; | |
4023 | } | |
4024 | } | |
4025 | data->rpc_status = task->tk_status; | |
4026 | } | |
4027 | ||
4028 | static void nfs4_delegreturn_release(void *calldata) | |
4029 | { | |
4030 | kfree(calldata); | |
4031 | } | |
4032 | ||
4033 | #if defined(CONFIG_NFS_V4_1) | |
4034 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
4035 | { | |
4036 | struct nfs4_delegreturndata *d_data; | |
4037 | ||
4038 | d_data = (struct nfs4_delegreturndata *)data; | |
4039 | ||
4040 | if (nfs4_setup_sequence(d_data->res.server, | |
4041 | &d_data->args.seq_args, | |
4042 | &d_data->res.seq_res, task)) | |
4043 | return; | |
4044 | rpc_call_start(task); | |
4045 | } | |
4046 | #endif /* CONFIG_NFS_V4_1 */ | |
4047 | ||
4048 | static const struct rpc_call_ops nfs4_delegreturn_ops = { | |
4049 | #if defined(CONFIG_NFS_V4_1) | |
4050 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
4051 | #endif /* CONFIG_NFS_V4_1 */ | |
4052 | .rpc_call_done = nfs4_delegreturn_done, | |
4053 | .rpc_release = nfs4_delegreturn_release, | |
4054 | }; | |
4055 | ||
4056 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
4057 | { | |
4058 | struct nfs4_delegreturndata *data; | |
4059 | struct nfs_server *server = NFS_SERVER(inode); | |
4060 | struct rpc_task *task; | |
4061 | struct rpc_message msg = { | |
4062 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
4063 | .rpc_cred = cred, | |
4064 | }; | |
4065 | struct rpc_task_setup task_setup_data = { | |
4066 | .rpc_client = server->client, | |
4067 | .rpc_message = &msg, | |
4068 | .callback_ops = &nfs4_delegreturn_ops, | |
4069 | .flags = RPC_TASK_ASYNC, | |
4070 | }; | |
4071 | int status = 0; | |
4072 | ||
4073 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
4074 | if (data == NULL) | |
4075 | return -ENOMEM; | |
4076 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
4077 | data->args.fhandle = &data->fh; | |
4078 | data->args.stateid = &data->stateid; | |
4079 | data->args.bitmask = server->cache_consistency_bitmask; | |
4080 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
4081 | nfs4_stateid_copy(&data->stateid, stateid); | |
4082 | data->res.fattr = &data->fattr; | |
4083 | data->res.server = server; | |
4084 | nfs_fattr_init(data->res.fattr); | |
4085 | data->timestamp = jiffies; | |
4086 | data->rpc_status = 0; | |
4087 | ||
4088 | task_setup_data.callback_data = data; | |
4089 | msg.rpc_argp = &data->args; | |
4090 | msg.rpc_resp = &data->res; | |
4091 | task = rpc_run_task(&task_setup_data); | |
4092 | if (IS_ERR(task)) | |
4093 | return PTR_ERR(task); | |
4094 | if (!issync) | |
4095 | goto out; | |
4096 | status = nfs4_wait_for_completion_rpc_task(task); | |
4097 | if (status != 0) | |
4098 | goto out; | |
4099 | status = data->rpc_status; | |
4100 | if (status == 0) | |
4101 | nfs_post_op_update_inode_force_wcc(inode, &data->fattr); | |
4102 | else | |
4103 | nfs_refresh_inode(inode, &data->fattr); | |
4104 | out: | |
4105 | rpc_put_task(task); | |
4106 | return status; | |
4107 | } | |
4108 | ||
4109 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
4110 | { | |
4111 | struct nfs_server *server = NFS_SERVER(inode); | |
4112 | struct nfs4_exception exception = { }; | |
4113 | int err; | |
4114 | do { | |
4115 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); | |
4116 | switch (err) { | |
4117 | case -NFS4ERR_STALE_STATEID: | |
4118 | case -NFS4ERR_EXPIRED: | |
4119 | case 0: | |
4120 | return 0; | |
4121 | } | |
4122 | err = nfs4_handle_exception(server, err, &exception); | |
4123 | } while (exception.retry); | |
4124 | return err; | |
4125 | } | |
4126 | ||
4127 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
4128 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
4129 | ||
4130 | /* | |
4131 | * sleep, with exponential backoff, and retry the LOCK operation. | |
4132 | */ | |
4133 | static unsigned long | |
4134 | nfs4_set_lock_task_retry(unsigned long timeout) | |
4135 | { | |
4136 | freezable_schedule_timeout_killable(timeout); | |
4137 | timeout <<= 1; | |
4138 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
4139 | return NFS4_LOCK_MAXTIMEOUT; | |
4140 | return timeout; | |
4141 | } | |
4142 | ||
4143 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4144 | { | |
4145 | struct inode *inode = state->inode; | |
4146 | struct nfs_server *server = NFS_SERVER(inode); | |
4147 | struct nfs_client *clp = server->nfs_client; | |
4148 | struct nfs_lockt_args arg = { | |
4149 | .fh = NFS_FH(inode), | |
4150 | .fl = request, | |
4151 | }; | |
4152 | struct nfs_lockt_res res = { | |
4153 | .denied = request, | |
4154 | }; | |
4155 | struct rpc_message msg = { | |
4156 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
4157 | .rpc_argp = &arg, | |
4158 | .rpc_resp = &res, | |
4159 | .rpc_cred = state->owner->so_cred, | |
4160 | }; | |
4161 | struct nfs4_lock_state *lsp; | |
4162 | int status; | |
4163 | ||
4164 | arg.lock_owner.clientid = clp->cl_clientid; | |
4165 | status = nfs4_set_lock_state(state, request); | |
4166 | if (status != 0) | |
4167 | goto out; | |
4168 | lsp = request->fl_u.nfs4_fl.owner; | |
4169 | arg.lock_owner.id = lsp->ls_seqid.owner_id; | |
4170 | arg.lock_owner.s_dev = server->s_dev; | |
4171 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
4172 | switch (status) { | |
4173 | case 0: | |
4174 | request->fl_type = F_UNLCK; | |
4175 | break; | |
4176 | case -NFS4ERR_DENIED: | |
4177 | status = 0; | |
4178 | } | |
4179 | request->fl_ops->fl_release_private(request); | |
4180 | out: | |
4181 | return status; | |
4182 | } | |
4183 | ||
4184 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4185 | { | |
4186 | struct nfs4_exception exception = { }; | |
4187 | int err; | |
4188 | ||
4189 | do { | |
4190 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
4191 | _nfs4_proc_getlk(state, cmd, request), | |
4192 | &exception); | |
4193 | } while (exception.retry); | |
4194 | return err; | |
4195 | } | |
4196 | ||
4197 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
4198 | { | |
4199 | int res = 0; | |
4200 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
4201 | case FL_POSIX: | |
4202 | res = posix_lock_file_wait(file, fl); | |
4203 | break; | |
4204 | case FL_FLOCK: | |
4205 | res = flock_lock_file_wait(file, fl); | |
4206 | break; | |
4207 | default: | |
4208 | BUG(); | |
4209 | } | |
4210 | return res; | |
4211 | } | |
4212 | ||
4213 | struct nfs4_unlockdata { | |
4214 | struct nfs_locku_args arg; | |
4215 | struct nfs_locku_res res; | |
4216 | struct nfs4_lock_state *lsp; | |
4217 | struct nfs_open_context *ctx; | |
4218 | struct file_lock fl; | |
4219 | const struct nfs_server *server; | |
4220 | unsigned long timestamp; | |
4221 | }; | |
4222 | ||
4223 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, | |
4224 | struct nfs_open_context *ctx, | |
4225 | struct nfs4_lock_state *lsp, | |
4226 | struct nfs_seqid *seqid) | |
4227 | { | |
4228 | struct nfs4_unlockdata *p; | |
4229 | struct inode *inode = lsp->ls_state->inode; | |
4230 | ||
4231 | p = kzalloc(sizeof(*p), GFP_NOFS); | |
4232 | if (p == NULL) | |
4233 | return NULL; | |
4234 | p->arg.fh = NFS_FH(inode); | |
4235 | p->arg.fl = &p->fl; | |
4236 | p->arg.seqid = seqid; | |
4237 | p->res.seqid = seqid; | |
4238 | p->arg.stateid = &lsp->ls_stateid; | |
4239 | p->lsp = lsp; | |
4240 | atomic_inc(&lsp->ls_count); | |
4241 | /* Ensure we don't close file until we're done freeing locks! */ | |
4242 | p->ctx = get_nfs_open_context(ctx); | |
4243 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4244 | p->server = NFS_SERVER(inode); | |
4245 | return p; | |
4246 | } | |
4247 | ||
4248 | static void nfs4_locku_release_calldata(void *data) | |
4249 | { | |
4250 | struct nfs4_unlockdata *calldata = data; | |
4251 | nfs_free_seqid(calldata->arg.seqid); | |
4252 | nfs4_put_lock_state(calldata->lsp); | |
4253 | put_nfs_open_context(calldata->ctx); | |
4254 | kfree(calldata); | |
4255 | } | |
4256 | ||
4257 | static void nfs4_locku_done(struct rpc_task *task, void *data) | |
4258 | { | |
4259 | struct nfs4_unlockdata *calldata = data; | |
4260 | ||
4261 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) | |
4262 | return; | |
4263 | switch (task->tk_status) { | |
4264 | case 0: | |
4265 | nfs4_stateid_copy(&calldata->lsp->ls_stateid, | |
4266 | &calldata->res.stateid); | |
4267 | renew_lease(calldata->server, calldata->timestamp); | |
4268 | break; | |
4269 | case -NFS4ERR_BAD_STATEID: | |
4270 | case -NFS4ERR_OLD_STATEID: | |
4271 | case -NFS4ERR_STALE_STATEID: | |
4272 | case -NFS4ERR_EXPIRED: | |
4273 | break; | |
4274 | default: | |
4275 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) | |
4276 | rpc_restart_call_prepare(task); | |
4277 | } | |
4278 | } | |
4279 | ||
4280 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) | |
4281 | { | |
4282 | struct nfs4_unlockdata *calldata = data; | |
4283 | ||
4284 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
4285 | return; | |
4286 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
4287 | /* Note: exit _without_ running nfs4_locku_done */ | |
4288 | task->tk_action = NULL; | |
4289 | return; | |
4290 | } | |
4291 | calldata->timestamp = jiffies; | |
4292 | if (nfs4_setup_sequence(calldata->server, | |
4293 | &calldata->arg.seq_args, | |
4294 | &calldata->res.seq_res, task)) | |
4295 | return; | |
4296 | rpc_call_start(task); | |
4297 | } | |
4298 | ||
4299 | static const struct rpc_call_ops nfs4_locku_ops = { | |
4300 | .rpc_call_prepare = nfs4_locku_prepare, | |
4301 | .rpc_call_done = nfs4_locku_done, | |
4302 | .rpc_release = nfs4_locku_release_calldata, | |
4303 | }; | |
4304 | ||
4305 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, | |
4306 | struct nfs_open_context *ctx, | |
4307 | struct nfs4_lock_state *lsp, | |
4308 | struct nfs_seqid *seqid) | |
4309 | { | |
4310 | struct nfs4_unlockdata *data; | |
4311 | struct rpc_message msg = { | |
4312 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
4313 | .rpc_cred = ctx->cred, | |
4314 | }; | |
4315 | struct rpc_task_setup task_setup_data = { | |
4316 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
4317 | .rpc_message = &msg, | |
4318 | .callback_ops = &nfs4_locku_ops, | |
4319 | .workqueue = nfsiod_workqueue, | |
4320 | .flags = RPC_TASK_ASYNC, | |
4321 | }; | |
4322 | ||
4323 | /* Ensure this is an unlock - when canceling a lock, the | |
4324 | * canceled lock is passed in, and it won't be an unlock. | |
4325 | */ | |
4326 | fl->fl_type = F_UNLCK; | |
4327 | ||
4328 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
4329 | if (data == NULL) { | |
4330 | nfs_free_seqid(seqid); | |
4331 | return ERR_PTR(-ENOMEM); | |
4332 | } | |
4333 | ||
4334 | nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); | |
4335 | msg.rpc_argp = &data->arg; | |
4336 | msg.rpc_resp = &data->res; | |
4337 | task_setup_data.callback_data = data; | |
4338 | return rpc_run_task(&task_setup_data); | |
4339 | } | |
4340 | ||
4341 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4342 | { | |
4343 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
4344 | struct nfs_seqid *seqid; | |
4345 | struct nfs4_lock_state *lsp; | |
4346 | struct rpc_task *task; | |
4347 | int status = 0; | |
4348 | unsigned char fl_flags = request->fl_flags; | |
4349 | ||
4350 | status = nfs4_set_lock_state(state, request); | |
4351 | /* Unlock _before_ we do the RPC call */ | |
4352 | request->fl_flags |= FL_EXISTS; | |
4353 | down_read(&nfsi->rwsem); | |
4354 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
4355 | up_read(&nfsi->rwsem); | |
4356 | goto out; | |
4357 | } | |
4358 | up_read(&nfsi->rwsem); | |
4359 | if (status != 0) | |
4360 | goto out; | |
4361 | /* Is this a delegated lock? */ | |
4362 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
4363 | goto out; | |
4364 | lsp = request->fl_u.nfs4_fl.owner; | |
4365 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); | |
4366 | status = -ENOMEM; | |
4367 | if (seqid == NULL) | |
4368 | goto out; | |
4369 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); | |
4370 | status = PTR_ERR(task); | |
4371 | if (IS_ERR(task)) | |
4372 | goto out; | |
4373 | status = nfs4_wait_for_completion_rpc_task(task); | |
4374 | rpc_put_task(task); | |
4375 | out: | |
4376 | request->fl_flags = fl_flags; | |
4377 | return status; | |
4378 | } | |
4379 | ||
4380 | struct nfs4_lockdata { | |
4381 | struct nfs_lock_args arg; | |
4382 | struct nfs_lock_res res; | |
4383 | struct nfs4_lock_state *lsp; | |
4384 | struct nfs_open_context *ctx; | |
4385 | struct file_lock fl; | |
4386 | unsigned long timestamp; | |
4387 | int rpc_status; | |
4388 | int cancelled; | |
4389 | struct nfs_server *server; | |
4390 | }; | |
4391 | ||
4392 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
4393 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, | |
4394 | gfp_t gfp_mask) | |
4395 | { | |
4396 | struct nfs4_lockdata *p; | |
4397 | struct inode *inode = lsp->ls_state->inode; | |
4398 | struct nfs_server *server = NFS_SERVER(inode); | |
4399 | ||
4400 | p = kzalloc(sizeof(*p), gfp_mask); | |
4401 | if (p == NULL) | |
4402 | return NULL; | |
4403 | ||
4404 | p->arg.fh = NFS_FH(inode); | |
4405 | p->arg.fl = &p->fl; | |
4406 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); | |
4407 | if (p->arg.open_seqid == NULL) | |
4408 | goto out_free; | |
4409 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); | |
4410 | if (p->arg.lock_seqid == NULL) | |
4411 | goto out_free_seqid; | |
4412 | p->arg.lock_stateid = &lsp->ls_stateid; | |
4413 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; | |
4414 | p->arg.lock_owner.id = lsp->ls_seqid.owner_id; | |
4415 | p->arg.lock_owner.s_dev = server->s_dev; | |
4416 | p->res.lock_seqid = p->arg.lock_seqid; | |
4417 | p->lsp = lsp; | |
4418 | p->server = server; | |
4419 | atomic_inc(&lsp->ls_count); | |
4420 | p->ctx = get_nfs_open_context(ctx); | |
4421 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4422 | return p; | |
4423 | out_free_seqid: | |
4424 | nfs_free_seqid(p->arg.open_seqid); | |
4425 | out_free: | |
4426 | kfree(p); | |
4427 | return NULL; | |
4428 | } | |
4429 | ||
4430 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
4431 | { | |
4432 | struct nfs4_lockdata *data = calldata; | |
4433 | struct nfs4_state *state = data->lsp->ls_state; | |
4434 | ||
4435 | dprintk("%s: begin!\n", __func__); | |
4436 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) | |
4437 | return; | |
4438 | /* Do we need to do an open_to_lock_owner? */ | |
4439 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
4440 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) | |
4441 | return; | |
4442 | data->arg.open_stateid = &state->stateid; | |
4443 | data->arg.new_lock_owner = 1; | |
4444 | data->res.open_seqid = data->arg.open_seqid; | |
4445 | } else | |
4446 | data->arg.new_lock_owner = 0; | |
4447 | data->timestamp = jiffies; | |
4448 | if (nfs4_setup_sequence(data->server, | |
4449 | &data->arg.seq_args, | |
4450 | &data->res.seq_res, task)) | |
4451 | return; | |
4452 | rpc_call_start(task); | |
4453 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); | |
4454 | } | |
4455 | ||
4456 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) | |
4457 | { | |
4458 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
4459 | nfs4_lock_prepare(task, calldata); | |
4460 | } | |
4461 | ||
4462 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
4463 | { | |
4464 | struct nfs4_lockdata *data = calldata; | |
4465 | ||
4466 | dprintk("%s: begin!\n", __func__); | |
4467 | ||
4468 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
4469 | return; | |
4470 | ||
4471 | data->rpc_status = task->tk_status; | |
4472 | if (data->arg.new_lock_owner != 0) { | |
4473 | if (data->rpc_status == 0) | |
4474 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4475 | else | |
4476 | goto out; | |
4477 | } | |
4478 | if (data->rpc_status == 0) { | |
4479 | nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); | |
4480 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
4481 | renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); | |
4482 | } | |
4483 | out: | |
4484 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); | |
4485 | } | |
4486 | ||
4487 | static void nfs4_lock_release(void *calldata) | |
4488 | { | |
4489 | struct nfs4_lockdata *data = calldata; | |
4490 | ||
4491 | dprintk("%s: begin!\n", __func__); | |
4492 | nfs_free_seqid(data->arg.open_seqid); | |
4493 | if (data->cancelled != 0) { | |
4494 | struct rpc_task *task; | |
4495 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4496 | data->arg.lock_seqid); | |
4497 | if (!IS_ERR(task)) | |
4498 | rpc_put_task_async(task); | |
4499 | dprintk("%s: cancelling lock!\n", __func__); | |
4500 | } else | |
4501 | nfs_free_seqid(data->arg.lock_seqid); | |
4502 | nfs4_put_lock_state(data->lsp); | |
4503 | put_nfs_open_context(data->ctx); | |
4504 | kfree(data); | |
4505 | dprintk("%s: done!\n", __func__); | |
4506 | } | |
4507 | ||
4508 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4509 | .rpc_call_prepare = nfs4_lock_prepare, | |
4510 | .rpc_call_done = nfs4_lock_done, | |
4511 | .rpc_release = nfs4_lock_release, | |
4512 | }; | |
4513 | ||
4514 | static const struct rpc_call_ops nfs4_recover_lock_ops = { | |
4515 | .rpc_call_prepare = nfs4_recover_lock_prepare, | |
4516 | .rpc_call_done = nfs4_lock_done, | |
4517 | .rpc_release = nfs4_lock_release, | |
4518 | }; | |
4519 | ||
4520 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) | |
4521 | { | |
4522 | switch (error) { | |
4523 | case -NFS4ERR_ADMIN_REVOKED: | |
4524 | case -NFS4ERR_BAD_STATEID: | |
4525 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
4526 | if (new_lock_owner != 0 || | |
4527 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4528 | nfs4_schedule_stateid_recovery(server, lsp->ls_state); | |
4529 | break; | |
4530 | case -NFS4ERR_STALE_STATEID: | |
4531 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
4532 | case -NFS4ERR_EXPIRED: | |
4533 | nfs4_schedule_lease_recovery(server->nfs_client); | |
4534 | }; | |
4535 | } | |
4536 | ||
4537 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) | |
4538 | { | |
4539 | struct nfs4_lockdata *data; | |
4540 | struct rpc_task *task; | |
4541 | struct rpc_message msg = { | |
4542 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4543 | .rpc_cred = state->owner->so_cred, | |
4544 | }; | |
4545 | struct rpc_task_setup task_setup_data = { | |
4546 | .rpc_client = NFS_CLIENT(state->inode), | |
4547 | .rpc_message = &msg, | |
4548 | .callback_ops = &nfs4_lock_ops, | |
4549 | .workqueue = nfsiod_workqueue, | |
4550 | .flags = RPC_TASK_ASYNC, | |
4551 | }; | |
4552 | int ret; | |
4553 | ||
4554 | dprintk("%s: begin!\n", __func__); | |
4555 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), | |
4556 | fl->fl_u.nfs4_fl.owner, | |
4557 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); | |
4558 | if (data == NULL) | |
4559 | return -ENOMEM; | |
4560 | if (IS_SETLKW(cmd)) | |
4561 | data->arg.block = 1; | |
4562 | if (recovery_type > NFS_LOCK_NEW) { | |
4563 | if (recovery_type == NFS_LOCK_RECLAIM) | |
4564 | data->arg.reclaim = NFS_LOCK_RECLAIM; | |
4565 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; | |
4566 | } | |
4567 | nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); | |
4568 | msg.rpc_argp = &data->arg; | |
4569 | msg.rpc_resp = &data->res; | |
4570 | task_setup_data.callback_data = data; | |
4571 | task = rpc_run_task(&task_setup_data); | |
4572 | if (IS_ERR(task)) | |
4573 | return PTR_ERR(task); | |
4574 | ret = nfs4_wait_for_completion_rpc_task(task); | |
4575 | if (ret == 0) { | |
4576 | ret = data->rpc_status; | |
4577 | if (ret) | |
4578 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4579 | data->arg.new_lock_owner, ret); | |
4580 | } else | |
4581 | data->cancelled = 1; | |
4582 | rpc_put_task(task); | |
4583 | dprintk("%s: done, ret = %d!\n", __func__, ret); | |
4584 | return ret; | |
4585 | } | |
4586 | ||
4587 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4588 | { | |
4589 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4590 | struct nfs4_exception exception = { | |
4591 | .inode = state->inode, | |
4592 | }; | |
4593 | int err; | |
4594 | ||
4595 | do { | |
4596 | /* Cache the lock if possible... */ | |
4597 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4598 | return 0; | |
4599 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); | |
4600 | if (err != -NFS4ERR_DELAY) | |
4601 | break; | |
4602 | nfs4_handle_exception(server, err, &exception); | |
4603 | } while (exception.retry); | |
4604 | return err; | |
4605 | } | |
4606 | ||
4607 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4608 | { | |
4609 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4610 | struct nfs4_exception exception = { | |
4611 | .inode = state->inode, | |
4612 | }; | |
4613 | int err; | |
4614 | ||
4615 | err = nfs4_set_lock_state(state, request); | |
4616 | if (err != 0) | |
4617 | return err; | |
4618 | do { | |
4619 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4620 | return 0; | |
4621 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); | |
4622 | switch (err) { | |
4623 | default: | |
4624 | goto out; | |
4625 | case -NFS4ERR_GRACE: | |
4626 | case -NFS4ERR_DELAY: | |
4627 | nfs4_handle_exception(server, err, &exception); | |
4628 | err = 0; | |
4629 | } | |
4630 | } while (exception.retry); | |
4631 | out: | |
4632 | return err; | |
4633 | } | |
4634 | ||
4635 | #if defined(CONFIG_NFS_V4_1) | |
4636 | static int nfs41_check_expired_locks(struct nfs4_state *state) | |
4637 | { | |
4638 | int status, ret = NFS_OK; | |
4639 | struct nfs4_lock_state *lsp; | |
4640 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4641 | ||
4642 | list_for_each_entry(lsp, &state->lock_states, ls_locks) { | |
4643 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { | |
4644 | status = nfs41_test_stateid(server, &lsp->ls_stateid); | |
4645 | if (status != NFS_OK) { | |
4646 | nfs41_free_stateid(server, &lsp->ls_stateid); | |
4647 | lsp->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
4648 | ret = status; | |
4649 | } | |
4650 | } | |
4651 | }; | |
4652 | ||
4653 | return ret; | |
4654 | } | |
4655 | ||
4656 | static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4657 | { | |
4658 | int status = NFS_OK; | |
4659 | ||
4660 | if (test_bit(LK_STATE_IN_USE, &state->flags)) | |
4661 | status = nfs41_check_expired_locks(state); | |
4662 | if (status == NFS_OK) | |
4663 | return status; | |
4664 | return nfs4_lock_expired(state, request); | |
4665 | } | |
4666 | #endif | |
4667 | ||
4668 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4669 | { | |
4670 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
4671 | unsigned char fl_flags = request->fl_flags; | |
4672 | int status = -ENOLCK; | |
4673 | ||
4674 | if ((fl_flags & FL_POSIX) && | |
4675 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4676 | goto out; | |
4677 | /* Is this a delegated open? */ | |
4678 | status = nfs4_set_lock_state(state, request); | |
4679 | if (status != 0) | |
4680 | goto out; | |
4681 | request->fl_flags |= FL_ACCESS; | |
4682 | status = do_vfs_lock(request->fl_file, request); | |
4683 | if (status < 0) | |
4684 | goto out; | |
4685 | down_read(&nfsi->rwsem); | |
4686 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
4687 | /* Yes: cache locks! */ | |
4688 | /* ...but avoid races with delegation recall... */ | |
4689 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
4690 | status = do_vfs_lock(request->fl_file, request); | |
4691 | goto out_unlock; | |
4692 | } | |
4693 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); | |
4694 | if (status != 0) | |
4695 | goto out_unlock; | |
4696 | /* Note: we always want to sleep here! */ | |
4697 | request->fl_flags = fl_flags | FL_SLEEP; | |
4698 | if (do_vfs_lock(request->fl_file, request) < 0) | |
4699 | printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " | |
4700 | "manager!\n", __func__); | |
4701 | out_unlock: | |
4702 | up_read(&nfsi->rwsem); | |
4703 | out: | |
4704 | request->fl_flags = fl_flags; | |
4705 | return status; | |
4706 | } | |
4707 | ||
4708 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4709 | { | |
4710 | struct nfs4_exception exception = { | |
4711 | .state = state, | |
4712 | .inode = state->inode, | |
4713 | }; | |
4714 | int err; | |
4715 | ||
4716 | do { | |
4717 | err = _nfs4_proc_setlk(state, cmd, request); | |
4718 | if (err == -NFS4ERR_DENIED) | |
4719 | err = -EAGAIN; | |
4720 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
4721 | err, &exception); | |
4722 | } while (exception.retry); | |
4723 | return err; | |
4724 | } | |
4725 | ||
4726 | static int | |
4727 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4728 | { | |
4729 | struct nfs_open_context *ctx; | |
4730 | struct nfs4_state *state; | |
4731 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4732 | int status; | |
4733 | ||
4734 | /* verify open state */ | |
4735 | ctx = nfs_file_open_context(filp); | |
4736 | state = ctx->state; | |
4737 | ||
4738 | if (request->fl_start < 0 || request->fl_end < 0) | |
4739 | return -EINVAL; | |
4740 | ||
4741 | if (IS_GETLK(cmd)) { | |
4742 | if (state != NULL) | |
4743 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4744 | return 0; | |
4745 | } | |
4746 | ||
4747 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4748 | return -EINVAL; | |
4749 | ||
4750 | if (request->fl_type == F_UNLCK) { | |
4751 | if (state != NULL) | |
4752 | return nfs4_proc_unlck(state, cmd, request); | |
4753 | return 0; | |
4754 | } | |
4755 | ||
4756 | if (state == NULL) | |
4757 | return -ENOLCK; | |
4758 | /* | |
4759 | * Don't rely on the VFS having checked the file open mode, | |
4760 | * since it won't do this for flock() locks. | |
4761 | */ | |
4762 | switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) { | |
4763 | case F_RDLCK: | |
4764 | if (!(filp->f_mode & FMODE_READ)) | |
4765 | return -EBADF; | |
4766 | break; | |
4767 | case F_WRLCK: | |
4768 | if (!(filp->f_mode & FMODE_WRITE)) | |
4769 | return -EBADF; | |
4770 | } | |
4771 | ||
4772 | do { | |
4773 | status = nfs4_proc_setlk(state, cmd, request); | |
4774 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4775 | break; | |
4776 | timeout = nfs4_set_lock_task_retry(timeout); | |
4777 | status = -ERESTARTSYS; | |
4778 | if (signalled()) | |
4779 | break; | |
4780 | } while(status < 0); | |
4781 | return status; | |
4782 | } | |
4783 | ||
4784 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) | |
4785 | { | |
4786 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4787 | struct nfs4_exception exception = { }; | |
4788 | int err; | |
4789 | ||
4790 | err = nfs4_set_lock_state(state, fl); | |
4791 | if (err != 0) | |
4792 | goto out; | |
4793 | do { | |
4794 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); | |
4795 | switch (err) { | |
4796 | default: | |
4797 | printk(KERN_ERR "NFS: %s: unhandled error " | |
4798 | "%d.\n", __func__, err); | |
4799 | case 0: | |
4800 | case -ESTALE: | |
4801 | goto out; | |
4802 | case -NFS4ERR_EXPIRED: | |
4803 | nfs4_schedule_stateid_recovery(server, state); | |
4804 | case -NFS4ERR_STALE_CLIENTID: | |
4805 | case -NFS4ERR_STALE_STATEID: | |
4806 | nfs4_schedule_lease_recovery(server->nfs_client); | |
4807 | goto out; | |
4808 | case -NFS4ERR_BADSESSION: | |
4809 | case -NFS4ERR_BADSLOT: | |
4810 | case -NFS4ERR_BAD_HIGH_SLOT: | |
4811 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
4812 | case -NFS4ERR_DEADSESSION: | |
4813 | nfs4_schedule_session_recovery(server->nfs_client->cl_session); | |
4814 | goto out; | |
4815 | case -ERESTARTSYS: | |
4816 | /* | |
4817 | * The show must go on: exit, but mark the | |
4818 | * stateid as needing recovery. | |
4819 | */ | |
4820 | case -NFS4ERR_DELEG_REVOKED: | |
4821 | case -NFS4ERR_ADMIN_REVOKED: | |
4822 | case -NFS4ERR_BAD_STATEID: | |
4823 | case -NFS4ERR_OPENMODE: | |
4824 | nfs4_schedule_stateid_recovery(server, state); | |
4825 | err = 0; | |
4826 | goto out; | |
4827 | case -EKEYEXPIRED: | |
4828 | /* | |
4829 | * User RPCSEC_GSS context has expired. | |
4830 | * We cannot recover this stateid now, so | |
4831 | * skip it and allow recovery thread to | |
4832 | * proceed. | |
4833 | */ | |
4834 | err = 0; | |
4835 | goto out; | |
4836 | case -ENOMEM: | |
4837 | case -NFS4ERR_DENIED: | |
4838 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
4839 | err = 0; | |
4840 | goto out; | |
4841 | case -NFS4ERR_DELAY: | |
4842 | break; | |
4843 | } | |
4844 | err = nfs4_handle_exception(server, err, &exception); | |
4845 | } while (exception.retry); | |
4846 | out: | |
4847 | return err; | |
4848 | } | |
4849 | ||
4850 | struct nfs_release_lockowner_data { | |
4851 | struct nfs4_lock_state *lsp; | |
4852 | struct nfs_server *server; | |
4853 | struct nfs_release_lockowner_args args; | |
4854 | }; | |
4855 | ||
4856 | static void nfs4_release_lockowner_release(void *calldata) | |
4857 | { | |
4858 | struct nfs_release_lockowner_data *data = calldata; | |
4859 | nfs4_free_lock_state(data->server, data->lsp); | |
4860 | kfree(calldata); | |
4861 | } | |
4862 | ||
4863 | static const struct rpc_call_ops nfs4_release_lockowner_ops = { | |
4864 | .rpc_release = nfs4_release_lockowner_release, | |
4865 | }; | |
4866 | ||
4867 | int nfs4_release_lockowner(struct nfs4_lock_state *lsp) | |
4868 | { | |
4869 | struct nfs_server *server = lsp->ls_state->owner->so_server; | |
4870 | struct nfs_release_lockowner_data *data; | |
4871 | struct rpc_message msg = { | |
4872 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], | |
4873 | }; | |
4874 | ||
4875 | if (server->nfs_client->cl_mvops->minor_version != 0) | |
4876 | return -EINVAL; | |
4877 | data = kmalloc(sizeof(*data), GFP_NOFS); | |
4878 | if (!data) | |
4879 | return -ENOMEM; | |
4880 | data->lsp = lsp; | |
4881 | data->server = server; | |
4882 | data->args.lock_owner.clientid = server->nfs_client->cl_clientid; | |
4883 | data->args.lock_owner.id = lsp->ls_seqid.owner_id; | |
4884 | data->args.lock_owner.s_dev = server->s_dev; | |
4885 | msg.rpc_argp = &data->args; | |
4886 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); | |
4887 | return 0; | |
4888 | } | |
4889 | ||
4890 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" | |
4891 | ||
4892 | static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, | |
4893 | const void *buf, size_t buflen, | |
4894 | int flags, int type) | |
4895 | { | |
4896 | if (strcmp(key, "") != 0) | |
4897 | return -EINVAL; | |
4898 | ||
4899 | return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); | |
4900 | } | |
4901 | ||
4902 | static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, | |
4903 | void *buf, size_t buflen, int type) | |
4904 | { | |
4905 | if (strcmp(key, "") != 0) | |
4906 | return -EINVAL; | |
4907 | ||
4908 | return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); | |
4909 | } | |
4910 | ||
4911 | static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, | |
4912 | size_t list_len, const char *name, | |
4913 | size_t name_len, int type) | |
4914 | { | |
4915 | size_t len = sizeof(XATTR_NAME_NFSV4_ACL); | |
4916 | ||
4917 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) | |
4918 | return 0; | |
4919 | ||
4920 | if (list && len <= list_len) | |
4921 | memcpy(list, XATTR_NAME_NFSV4_ACL, len); | |
4922 | return len; | |
4923 | } | |
4924 | ||
4925 | /* | |
4926 | * nfs_fhget will use either the mounted_on_fileid or the fileid | |
4927 | */ | |
4928 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) | |
4929 | { | |
4930 | if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || | |
4931 | (fattr->valid & NFS_ATTR_FATTR_FILEID)) && | |
4932 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4933 | (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) | |
4934 | return; | |
4935 | ||
4936 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4937 | NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; | |
4938 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4939 | fattr->nlink = 2; | |
4940 | } | |
4941 | ||
4942 | static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, | |
4943 | const struct qstr *name, | |
4944 | struct nfs4_fs_locations *fs_locations, | |
4945 | struct page *page) | |
4946 | { | |
4947 | struct nfs_server *server = NFS_SERVER(dir); | |
4948 | u32 bitmask[2] = { | |
4949 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, | |
4950 | }; | |
4951 | struct nfs4_fs_locations_arg args = { | |
4952 | .dir_fh = NFS_FH(dir), | |
4953 | .name = name, | |
4954 | .page = page, | |
4955 | .bitmask = bitmask, | |
4956 | }; | |
4957 | struct nfs4_fs_locations_res res = { | |
4958 | .fs_locations = fs_locations, | |
4959 | }; | |
4960 | struct rpc_message msg = { | |
4961 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4962 | .rpc_argp = &args, | |
4963 | .rpc_resp = &res, | |
4964 | }; | |
4965 | int status; | |
4966 | ||
4967 | dprintk("%s: start\n", __func__); | |
4968 | ||
4969 | /* Ask for the fileid of the absent filesystem if mounted_on_fileid | |
4970 | * is not supported */ | |
4971 | if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) | |
4972 | bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; | |
4973 | else | |
4974 | bitmask[0] |= FATTR4_WORD0_FILEID; | |
4975 | ||
4976 | nfs_fattr_init(&fs_locations->fattr); | |
4977 | fs_locations->server = server; | |
4978 | fs_locations->nlocations = 0; | |
4979 | status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
4980 | dprintk("%s: returned status = %d\n", __func__, status); | |
4981 | return status; | |
4982 | } | |
4983 | ||
4984 | int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, | |
4985 | const struct qstr *name, | |
4986 | struct nfs4_fs_locations *fs_locations, | |
4987 | struct page *page) | |
4988 | { | |
4989 | struct nfs4_exception exception = { }; | |
4990 | int err; | |
4991 | do { | |
4992 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
4993 | _nfs4_proc_fs_locations(client, dir, name, fs_locations, page), | |
4994 | &exception); | |
4995 | } while (exception.retry); | |
4996 | return err; | |
4997 | } | |
4998 | ||
4999 | static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors) | |
5000 | { | |
5001 | int status; | |
5002 | struct nfs4_secinfo_arg args = { | |
5003 | .dir_fh = NFS_FH(dir), | |
5004 | .name = name, | |
5005 | }; | |
5006 | struct nfs4_secinfo_res res = { | |
5007 | .flavors = flavors, | |
5008 | }; | |
5009 | struct rpc_message msg = { | |
5010 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], | |
5011 | .rpc_argp = &args, | |
5012 | .rpc_resp = &res, | |
5013 | }; | |
5014 | ||
5015 | dprintk("NFS call secinfo %s\n", name->name); | |
5016 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); | |
5017 | dprintk("NFS reply secinfo: %d\n", status); | |
5018 | return status; | |
5019 | } | |
5020 | ||
5021 | int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, | |
5022 | struct nfs4_secinfo_flavors *flavors) | |
5023 | { | |
5024 | struct nfs4_exception exception = { }; | |
5025 | int err; | |
5026 | do { | |
5027 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
5028 | _nfs4_proc_secinfo(dir, name, flavors), | |
5029 | &exception); | |
5030 | } while (exception.retry); | |
5031 | return err; | |
5032 | } | |
5033 | ||
5034 | #ifdef CONFIG_NFS_V4_1 | |
5035 | /* | |
5036 | * Check the exchange flags returned by the server for invalid flags, having | |
5037 | * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or | |
5038 | * DS flags set. | |
5039 | */ | |
5040 | static int nfs4_check_cl_exchange_flags(u32 flags) | |
5041 | { | |
5042 | if (flags & ~EXCHGID4_FLAG_MASK_R) | |
5043 | goto out_inval; | |
5044 | if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && | |
5045 | (flags & EXCHGID4_FLAG_USE_NON_PNFS)) | |
5046 | goto out_inval; | |
5047 | if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) | |
5048 | goto out_inval; | |
5049 | return NFS_OK; | |
5050 | out_inval: | |
5051 | return -NFS4ERR_INVAL; | |
5052 | } | |
5053 | ||
5054 | static bool | |
5055 | nfs41_same_server_scope(struct nfs41_server_scope *a, | |
5056 | struct nfs41_server_scope *b) | |
5057 | { | |
5058 | if (a->server_scope_sz == b->server_scope_sz && | |
5059 | memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) | |
5060 | return true; | |
5061 | ||
5062 | return false; | |
5063 | } | |
5064 | ||
5065 | /* | |
5066 | * nfs4_proc_exchange_id() | |
5067 | * | |
5068 | * Since the clientid has expired, all compounds using sessions | |
5069 | * associated with the stale clientid will be returning | |
5070 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
5071 | * be in some phase of session reset. | |
5072 | */ | |
5073 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) | |
5074 | { | |
5075 | nfs4_verifier verifier; | |
5076 | struct nfs41_exchange_id_args args = { | |
5077 | .verifier = &verifier, | |
5078 | .client = clp, | |
5079 | .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, | |
5080 | }; | |
5081 | struct nfs41_exchange_id_res res = { | |
5082 | .client = clp, | |
5083 | }; | |
5084 | int status; | |
5085 | struct rpc_message msg = { | |
5086 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
5087 | .rpc_argp = &args, | |
5088 | .rpc_resp = &res, | |
5089 | .rpc_cred = cred, | |
5090 | }; | |
5091 | ||
5092 | dprintk("--> %s\n", __func__); | |
5093 | BUG_ON(clp == NULL); | |
5094 | ||
5095 | nfs4_construct_boot_verifier(clp, &verifier); | |
5096 | ||
5097 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
5098 | "%s/%s/%u", | |
5099 | clp->cl_ipaddr, | |
5100 | clp->cl_rpcclient->cl_nodename, | |
5101 | clp->cl_rpcclient->cl_auth->au_flavor); | |
5102 | ||
5103 | res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), | |
5104 | GFP_KERNEL); | |
5105 | if (unlikely(res.server_scope == NULL)) { | |
5106 | status = -ENOMEM; | |
5107 | goto out; | |
5108 | } | |
5109 | ||
5110 | res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL); | |
5111 | if (unlikely(res.impl_id == NULL)) { | |
5112 | status = -ENOMEM; | |
5113 | goto out_server_scope; | |
5114 | } | |
5115 | ||
5116 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5117 | if (status == 0) | |
5118 | status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags); | |
5119 | ||
5120 | if (status == 0) { | |
5121 | /* use the most recent implementation id */ | |
5122 | kfree(clp->cl_implid); | |
5123 | clp->cl_implid = res.impl_id; | |
5124 | } else | |
5125 | kfree(res.impl_id); | |
5126 | ||
5127 | if (status == 0) { | |
5128 | if (clp->cl_serverscope != NULL && | |
5129 | !nfs41_same_server_scope(clp->cl_serverscope, | |
5130 | res.server_scope)) { | |
5131 | dprintk("%s: server_scope mismatch detected\n", | |
5132 | __func__); | |
5133 | set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); | |
5134 | kfree(clp->cl_serverscope); | |
5135 | clp->cl_serverscope = NULL; | |
5136 | } | |
5137 | ||
5138 | if (clp->cl_serverscope == NULL) { | |
5139 | clp->cl_serverscope = res.server_scope; | |
5140 | goto out; | |
5141 | } | |
5142 | } | |
5143 | ||
5144 | out_server_scope: | |
5145 | kfree(res.server_scope); | |
5146 | out: | |
5147 | if (clp->cl_implid != NULL) | |
5148 | dprintk("%s: Server Implementation ID: " | |
5149 | "domain: %s, name: %s, date: %llu,%u\n", | |
5150 | __func__, clp->cl_implid->domain, clp->cl_implid->name, | |
5151 | clp->cl_implid->date.seconds, | |
5152 | clp->cl_implid->date.nseconds); | |
5153 | dprintk("<-- %s status= %d\n", __func__, status); | |
5154 | return status; | |
5155 | } | |
5156 | ||
5157 | struct nfs4_get_lease_time_data { | |
5158 | struct nfs4_get_lease_time_args *args; | |
5159 | struct nfs4_get_lease_time_res *res; | |
5160 | struct nfs_client *clp; | |
5161 | }; | |
5162 | ||
5163 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
5164 | void *calldata) | |
5165 | { | |
5166 | int ret; | |
5167 | struct nfs4_get_lease_time_data *data = | |
5168 | (struct nfs4_get_lease_time_data *)calldata; | |
5169 | ||
5170 | dprintk("--> %s\n", __func__); | |
5171 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
5172 | /* just setup sequence, do not trigger session recovery | |
5173 | since we're invoked within one */ | |
5174 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
5175 | &data->args->la_seq_args, | |
5176 | &data->res->lr_seq_res, task); | |
5177 | ||
5178 | BUG_ON(ret == -EAGAIN); | |
5179 | rpc_call_start(task); | |
5180 | dprintk("<-- %s\n", __func__); | |
5181 | } | |
5182 | ||
5183 | /* | |
5184 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
5185 | * from sequence operation or clientid errors. | |
5186 | */ | |
5187 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
5188 | { | |
5189 | struct nfs4_get_lease_time_data *data = | |
5190 | (struct nfs4_get_lease_time_data *)calldata; | |
5191 | ||
5192 | dprintk("--> %s\n", __func__); | |
5193 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) | |
5194 | return; | |
5195 | switch (task->tk_status) { | |
5196 | case -NFS4ERR_DELAY: | |
5197 | case -NFS4ERR_GRACE: | |
5198 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
5199 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
5200 | task->tk_status = 0; | |
5201 | /* fall through */ | |
5202 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
5203 | rpc_restart_call_prepare(task); | |
5204 | return; | |
5205 | } | |
5206 | dprintk("<-- %s\n", __func__); | |
5207 | } | |
5208 | ||
5209 | static const struct rpc_call_ops nfs4_get_lease_time_ops = { | |
5210 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
5211 | .rpc_call_done = nfs4_get_lease_time_done, | |
5212 | }; | |
5213 | ||
5214 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
5215 | { | |
5216 | struct rpc_task *task; | |
5217 | struct nfs4_get_lease_time_args args; | |
5218 | struct nfs4_get_lease_time_res res = { | |
5219 | .lr_fsinfo = fsinfo, | |
5220 | }; | |
5221 | struct nfs4_get_lease_time_data data = { | |
5222 | .args = &args, | |
5223 | .res = &res, | |
5224 | .clp = clp, | |
5225 | }; | |
5226 | struct rpc_message msg = { | |
5227 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
5228 | .rpc_argp = &args, | |
5229 | .rpc_resp = &res, | |
5230 | }; | |
5231 | struct rpc_task_setup task_setup = { | |
5232 | .rpc_client = clp->cl_rpcclient, | |
5233 | .rpc_message = &msg, | |
5234 | .callback_ops = &nfs4_get_lease_time_ops, | |
5235 | .callback_data = &data, | |
5236 | .flags = RPC_TASK_TIMEOUT, | |
5237 | }; | |
5238 | int status; | |
5239 | ||
5240 | nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); | |
5241 | dprintk("--> %s\n", __func__); | |
5242 | task = rpc_run_task(&task_setup); | |
5243 | ||
5244 | if (IS_ERR(task)) | |
5245 | status = PTR_ERR(task); | |
5246 | else { | |
5247 | status = task->tk_status; | |
5248 | rpc_put_task(task); | |
5249 | } | |
5250 | dprintk("<-- %s return %d\n", __func__, status); | |
5251 | ||
5252 | return status; | |
5253 | } | |
5254 | ||
5255 | static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags) | |
5256 | { | |
5257 | return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags); | |
5258 | } | |
5259 | ||
5260 | static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl, | |
5261 | struct nfs4_slot *new, | |
5262 | u32 max_slots, | |
5263 | u32 ivalue) | |
5264 | { | |
5265 | struct nfs4_slot *old = NULL; | |
5266 | u32 i; | |
5267 | ||
5268 | spin_lock(&tbl->slot_tbl_lock); | |
5269 | if (new) { | |
5270 | old = tbl->slots; | |
5271 | tbl->slots = new; | |
5272 | tbl->max_slots = max_slots; | |
5273 | } | |
5274 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
5275 | for (i = 0; i < tbl->max_slots; i++) | |
5276 | tbl->slots[i].seq_nr = ivalue; | |
5277 | spin_unlock(&tbl->slot_tbl_lock); | |
5278 | kfree(old); | |
5279 | } | |
5280 | ||
5281 | /* | |
5282 | * (re)Initialise a slot table | |
5283 | */ | |
5284 | static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, | |
5285 | u32 ivalue) | |
5286 | { | |
5287 | struct nfs4_slot *new = NULL; | |
5288 | int ret = -ENOMEM; | |
5289 | ||
5290 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, | |
5291 | max_reqs, tbl->max_slots); | |
5292 | ||
5293 | /* Does the newly negotiated max_reqs match the existing slot table? */ | |
5294 | if (max_reqs != tbl->max_slots) { | |
5295 | new = nfs4_alloc_slots(max_reqs, GFP_NOFS); | |
5296 | if (!new) | |
5297 | goto out; | |
5298 | } | |
5299 | ret = 0; | |
5300 | ||
5301 | nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue); | |
5302 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
5303 | tbl, tbl->slots, tbl->max_slots); | |
5304 | out: | |
5305 | dprintk("<-- %s: return %d\n", __func__, ret); | |
5306 | return ret; | |
5307 | } | |
5308 | ||
5309 | /* Destroy the slot table */ | |
5310 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) | |
5311 | { | |
5312 | if (session->fc_slot_table.slots != NULL) { | |
5313 | kfree(session->fc_slot_table.slots); | |
5314 | session->fc_slot_table.slots = NULL; | |
5315 | } | |
5316 | if (session->bc_slot_table.slots != NULL) { | |
5317 | kfree(session->bc_slot_table.slots); | |
5318 | session->bc_slot_table.slots = NULL; | |
5319 | } | |
5320 | return; | |
5321 | } | |
5322 | ||
5323 | /* | |
5324 | * Initialize or reset the forechannel and backchannel tables | |
5325 | */ | |
5326 | static int nfs4_setup_session_slot_tables(struct nfs4_session *ses) | |
5327 | { | |
5328 | struct nfs4_slot_table *tbl; | |
5329 | int status; | |
5330 | ||
5331 | dprintk("--> %s\n", __func__); | |
5332 | /* Fore channel */ | |
5333 | tbl = &ses->fc_slot_table; | |
5334 | status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1); | |
5335 | if (status) /* -ENOMEM */ | |
5336 | return status; | |
5337 | /* Back channel */ | |
5338 | tbl = &ses->bc_slot_table; | |
5339 | status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0); | |
5340 | if (status && tbl->slots == NULL) | |
5341 | /* Fore and back channel share a connection so get | |
5342 | * both slot tables or neither */ | |
5343 | nfs4_destroy_slot_tables(ses); | |
5344 | return status; | |
5345 | } | |
5346 | ||
5347 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
5348 | { | |
5349 | struct nfs4_session *session; | |
5350 | struct nfs4_slot_table *tbl; | |
5351 | ||
5352 | session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); | |
5353 | if (!session) | |
5354 | return NULL; | |
5355 | ||
5356 | tbl = &session->fc_slot_table; | |
5357 | tbl->highest_used_slotid = NFS4_NO_SLOT; | |
5358 | spin_lock_init(&tbl->slot_tbl_lock); | |
5359 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); | |
5360 | init_completion(&tbl->complete); | |
5361 | ||
5362 | tbl = &session->bc_slot_table; | |
5363 | tbl->highest_used_slotid = NFS4_NO_SLOT; | |
5364 | spin_lock_init(&tbl->slot_tbl_lock); | |
5365 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); | |
5366 | init_completion(&tbl->complete); | |
5367 | ||
5368 | session->session_state = 1<<NFS4_SESSION_INITING; | |
5369 | ||
5370 | session->clp = clp; | |
5371 | return session; | |
5372 | } | |
5373 | ||
5374 | void nfs4_destroy_session(struct nfs4_session *session) | |
5375 | { | |
5376 | struct rpc_xprt *xprt; | |
5377 | ||
5378 | nfs4_proc_destroy_session(session); | |
5379 | ||
5380 | rcu_read_lock(); | |
5381 | xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt); | |
5382 | rcu_read_unlock(); | |
5383 | dprintk("%s Destroy backchannel for xprt %p\n", | |
5384 | __func__, xprt); | |
5385 | xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); | |
5386 | nfs4_destroy_slot_tables(session); | |
5387 | kfree(session); | |
5388 | } | |
5389 | ||
5390 | /* | |
5391 | * Initialize the values to be used by the client in CREATE_SESSION | |
5392 | * If nfs4_init_session set the fore channel request and response sizes, | |
5393 | * use them. | |
5394 | * | |
5395 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
5396 | * always set csa_cachethis to FALSE because the current implementation | |
5397 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
5398 | */ | |
5399 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
5400 | { | |
5401 | struct nfs4_session *session = args->client->cl_session; | |
5402 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
5403 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
5404 | ||
5405 | if (mxrqst_sz == 0) | |
5406 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
5407 | if (mxresp_sz == 0) | |
5408 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
5409 | /* Fore channel attributes */ | |
5410 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
5411 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
5412 | args->fc_attrs.max_ops = NFS4_MAX_OPS; | |
5413 | args->fc_attrs.max_reqs = max_session_slots; | |
5414 | ||
5415 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
5416 | "max_ops=%u max_reqs=%u\n", | |
5417 | __func__, | |
5418 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
5419 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); | |
5420 | ||
5421 | /* Back channel attributes */ | |
5422 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
5423 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
5424 | args->bc_attrs.max_resp_sz_cached = 0; | |
5425 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
5426 | args->bc_attrs.max_reqs = 1; | |
5427 | ||
5428 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
5429 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
5430 | __func__, | |
5431 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
5432 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
5433 | args->bc_attrs.max_reqs); | |
5434 | } | |
5435 | ||
5436 | static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) | |
5437 | { | |
5438 | struct nfs4_channel_attrs *sent = &args->fc_attrs; | |
5439 | struct nfs4_channel_attrs *rcvd = &session->fc_attrs; | |
5440 | ||
5441 | if (rcvd->max_resp_sz > sent->max_resp_sz) | |
5442 | return -EINVAL; | |
5443 | /* | |
5444 | * Our requested max_ops is the minimum we need; we're not | |
5445 | * prepared to break up compounds into smaller pieces than that. | |
5446 | * So, no point even trying to continue if the server won't | |
5447 | * cooperate: | |
5448 | */ | |
5449 | if (rcvd->max_ops < sent->max_ops) | |
5450 | return -EINVAL; | |
5451 | if (rcvd->max_reqs == 0) | |
5452 | return -EINVAL; | |
5453 | if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) | |
5454 | rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; | |
5455 | return 0; | |
5456 | } | |
5457 | ||
5458 | static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) | |
5459 | { | |
5460 | struct nfs4_channel_attrs *sent = &args->bc_attrs; | |
5461 | struct nfs4_channel_attrs *rcvd = &session->bc_attrs; | |
5462 | ||
5463 | if (rcvd->max_rqst_sz > sent->max_rqst_sz) | |
5464 | return -EINVAL; | |
5465 | if (rcvd->max_resp_sz < sent->max_resp_sz) | |
5466 | return -EINVAL; | |
5467 | if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) | |
5468 | return -EINVAL; | |
5469 | /* These would render the backchannel useless: */ | |
5470 | if (rcvd->max_ops != sent->max_ops) | |
5471 | return -EINVAL; | |
5472 | if (rcvd->max_reqs != sent->max_reqs) | |
5473 | return -EINVAL; | |
5474 | return 0; | |
5475 | } | |
5476 | ||
5477 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
5478 | struct nfs4_session *session) | |
5479 | { | |
5480 | int ret; | |
5481 | ||
5482 | ret = nfs4_verify_fore_channel_attrs(args, session); | |
5483 | if (ret) | |
5484 | return ret; | |
5485 | return nfs4_verify_back_channel_attrs(args, session); | |
5486 | } | |
5487 | ||
5488 | static int _nfs4_proc_create_session(struct nfs_client *clp) | |
5489 | { | |
5490 | struct nfs4_session *session = clp->cl_session; | |
5491 | struct nfs41_create_session_args args = { | |
5492 | .client = clp, | |
5493 | .cb_program = NFS4_CALLBACK, | |
5494 | }; | |
5495 | struct nfs41_create_session_res res = { | |
5496 | .client = clp, | |
5497 | }; | |
5498 | struct rpc_message msg = { | |
5499 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
5500 | .rpc_argp = &args, | |
5501 | .rpc_resp = &res, | |
5502 | }; | |
5503 | int status; | |
5504 | ||
5505 | nfs4_init_channel_attrs(&args); | |
5506 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); | |
5507 | ||
5508 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5509 | ||
5510 | if (!status) | |
5511 | /* Verify the session's negotiated channel_attrs values */ | |
5512 | status = nfs4_verify_channel_attrs(&args, session); | |
5513 | if (!status) { | |
5514 | /* Increment the clientid slot sequence id */ | |
5515 | clp->cl_seqid++; | |
5516 | } | |
5517 | ||
5518 | return status; | |
5519 | } | |
5520 | ||
5521 | /* | |
5522 | * Issues a CREATE_SESSION operation to the server. | |
5523 | * It is the responsibility of the caller to verify the session is | |
5524 | * expired before calling this routine. | |
5525 | */ | |
5526 | int nfs4_proc_create_session(struct nfs_client *clp) | |
5527 | { | |
5528 | int status; | |
5529 | unsigned *ptr; | |
5530 | struct nfs4_session *session = clp->cl_session; | |
5531 | ||
5532 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
5533 | ||
5534 | status = _nfs4_proc_create_session(clp); | |
5535 | if (status) | |
5536 | goto out; | |
5537 | ||
5538 | /* Init or reset the session slot tables */ | |
5539 | status = nfs4_setup_session_slot_tables(session); | |
5540 | dprintk("slot table setup returned %d\n", status); | |
5541 | if (status) | |
5542 | goto out; | |
5543 | ||
5544 | ptr = (unsigned *)&session->sess_id.data[0]; | |
5545 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
5546 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
5547 | out: | |
5548 | dprintk("<-- %s\n", __func__); | |
5549 | return status; | |
5550 | } | |
5551 | ||
5552 | /* | |
5553 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
5554 | * The caller must serialize access to this routine. | |
5555 | */ | |
5556 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
5557 | { | |
5558 | int status = 0; | |
5559 | struct rpc_message msg; | |
5560 | ||
5561 | dprintk("--> nfs4_proc_destroy_session\n"); | |
5562 | ||
5563 | /* session is still being setup */ | |
5564 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
5565 | return status; | |
5566 | ||
5567 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
5568 | msg.rpc_argp = session; | |
5569 | msg.rpc_resp = NULL; | |
5570 | msg.rpc_cred = NULL; | |
5571 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5572 | ||
5573 | if (status) | |
5574 | printk(KERN_WARNING | |
5575 | "NFS: Got error %d from the server on DESTROY_SESSION. " | |
5576 | "Session has been destroyed regardless...\n", status); | |
5577 | ||
5578 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
5579 | return status; | |
5580 | } | |
5581 | ||
5582 | int nfs4_init_session(struct nfs_server *server) | |
5583 | { | |
5584 | struct nfs_client *clp = server->nfs_client; | |
5585 | struct nfs4_session *session; | |
5586 | unsigned int rsize, wsize; | |
5587 | int ret; | |
5588 | ||
5589 | if (!nfs4_has_session(clp)) | |
5590 | return 0; | |
5591 | ||
5592 | session = clp->cl_session; | |
5593 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) | |
5594 | return 0; | |
5595 | ||
5596 | rsize = server->rsize; | |
5597 | if (rsize == 0) | |
5598 | rsize = NFS_MAX_FILE_IO_SIZE; | |
5599 | wsize = server->wsize; | |
5600 | if (wsize == 0) | |
5601 | wsize = NFS_MAX_FILE_IO_SIZE; | |
5602 | ||
5603 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; | |
5604 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; | |
5605 | ||
5606 | ret = nfs4_recover_expired_lease(server); | |
5607 | if (!ret) | |
5608 | ret = nfs4_check_client_ready(clp); | |
5609 | return ret; | |
5610 | } | |
5611 | ||
5612 | int nfs4_init_ds_session(struct nfs_client *clp) | |
5613 | { | |
5614 | struct nfs4_session *session = clp->cl_session; | |
5615 | int ret; | |
5616 | ||
5617 | if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) | |
5618 | return 0; | |
5619 | ||
5620 | ret = nfs4_client_recover_expired_lease(clp); | |
5621 | if (!ret) | |
5622 | /* Test for the DS role */ | |
5623 | if (!is_ds_client(clp)) | |
5624 | ret = -ENODEV; | |
5625 | if (!ret) | |
5626 | ret = nfs4_check_client_ready(clp); | |
5627 | return ret; | |
5628 | ||
5629 | } | |
5630 | EXPORT_SYMBOL_GPL(nfs4_init_ds_session); | |
5631 | ||
5632 | ||
5633 | /* | |
5634 | * Renew the cl_session lease. | |
5635 | */ | |
5636 | struct nfs4_sequence_data { | |
5637 | struct nfs_client *clp; | |
5638 | struct nfs4_sequence_args args; | |
5639 | struct nfs4_sequence_res res; | |
5640 | }; | |
5641 | ||
5642 | static void nfs41_sequence_release(void *data) | |
5643 | { | |
5644 | struct nfs4_sequence_data *calldata = data; | |
5645 | struct nfs_client *clp = calldata->clp; | |
5646 | ||
5647 | if (atomic_read(&clp->cl_count) > 1) | |
5648 | nfs4_schedule_state_renewal(clp); | |
5649 | nfs_put_client(clp); | |
5650 | kfree(calldata); | |
5651 | } | |
5652 | ||
5653 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) | |
5654 | { | |
5655 | switch(task->tk_status) { | |
5656 | case -NFS4ERR_DELAY: | |
5657 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5658 | return -EAGAIN; | |
5659 | default: | |
5660 | nfs4_schedule_lease_recovery(clp); | |
5661 | } | |
5662 | return 0; | |
5663 | } | |
5664 | ||
5665 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) | |
5666 | { | |
5667 | struct nfs4_sequence_data *calldata = data; | |
5668 | struct nfs_client *clp = calldata->clp; | |
5669 | ||
5670 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) | |
5671 | return; | |
5672 | ||
5673 | if (task->tk_status < 0) { | |
5674 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
5675 | if (atomic_read(&clp->cl_count) == 1) | |
5676 | goto out; | |
5677 | ||
5678 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { | |
5679 | rpc_restart_call_prepare(task); | |
5680 | return; | |
5681 | } | |
5682 | } | |
5683 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); | |
5684 | out: | |
5685 | dprintk("<-- %s\n", __func__); | |
5686 | } | |
5687 | ||
5688 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5689 | { | |
5690 | struct nfs4_sequence_data *calldata = data; | |
5691 | struct nfs_client *clp = calldata->clp; | |
5692 | struct nfs4_sequence_args *args; | |
5693 | struct nfs4_sequence_res *res; | |
5694 | ||
5695 | args = task->tk_msg.rpc_argp; | |
5696 | res = task->tk_msg.rpc_resp; | |
5697 | ||
5698 | if (nfs41_setup_sequence(clp->cl_session, args, res, task)) | |
5699 | return; | |
5700 | rpc_call_start(task); | |
5701 | } | |
5702 | ||
5703 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5704 | .rpc_call_done = nfs41_sequence_call_done, | |
5705 | .rpc_call_prepare = nfs41_sequence_prepare, | |
5706 | .rpc_release = nfs41_sequence_release, | |
5707 | }; | |
5708 | ||
5709 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5710 | { | |
5711 | struct nfs4_sequence_data *calldata; | |
5712 | struct rpc_message msg = { | |
5713 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5714 | .rpc_cred = cred, | |
5715 | }; | |
5716 | struct rpc_task_setup task_setup_data = { | |
5717 | .rpc_client = clp->cl_rpcclient, | |
5718 | .rpc_message = &msg, | |
5719 | .callback_ops = &nfs41_sequence_ops, | |
5720 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, | |
5721 | }; | |
5722 | ||
5723 | if (!atomic_inc_not_zero(&clp->cl_count)) | |
5724 | return ERR_PTR(-EIO); | |
5725 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); | |
5726 | if (calldata == NULL) { | |
5727 | nfs_put_client(clp); | |
5728 | return ERR_PTR(-ENOMEM); | |
5729 | } | |
5730 | nfs41_init_sequence(&calldata->args, &calldata->res, 0); | |
5731 | msg.rpc_argp = &calldata->args; | |
5732 | msg.rpc_resp = &calldata->res; | |
5733 | calldata->clp = clp; | |
5734 | task_setup_data.callback_data = calldata; | |
5735 | ||
5736 | return rpc_run_task(&task_setup_data); | |
5737 | } | |
5738 | ||
5739 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) | |
5740 | { | |
5741 | struct rpc_task *task; | |
5742 | int ret = 0; | |
5743 | ||
5744 | if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) | |
5745 | return 0; | |
5746 | task = _nfs41_proc_sequence(clp, cred); | |
5747 | if (IS_ERR(task)) | |
5748 | ret = PTR_ERR(task); | |
5749 | else | |
5750 | rpc_put_task_async(task); | |
5751 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5752 | return ret; | |
5753 | } | |
5754 | ||
5755 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5756 | { | |
5757 | struct rpc_task *task; | |
5758 | int ret; | |
5759 | ||
5760 | task = _nfs41_proc_sequence(clp, cred); | |
5761 | if (IS_ERR(task)) { | |
5762 | ret = PTR_ERR(task); | |
5763 | goto out; | |
5764 | } | |
5765 | ret = rpc_wait_for_completion_task(task); | |
5766 | if (!ret) { | |
5767 | struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; | |
5768 | ||
5769 | if (task->tk_status == 0) | |
5770 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
5771 | ret = task->tk_status; | |
5772 | } | |
5773 | rpc_put_task(task); | |
5774 | out: | |
5775 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5776 | return ret; | |
5777 | } | |
5778 | ||
5779 | struct nfs4_reclaim_complete_data { | |
5780 | struct nfs_client *clp; | |
5781 | struct nfs41_reclaim_complete_args arg; | |
5782 | struct nfs41_reclaim_complete_res res; | |
5783 | }; | |
5784 | ||
5785 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5786 | { | |
5787 | struct nfs4_reclaim_complete_data *calldata = data; | |
5788 | ||
5789 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
5790 | if (nfs41_setup_sequence(calldata->clp->cl_session, | |
5791 | &calldata->arg.seq_args, | |
5792 | &calldata->res.seq_res, task)) | |
5793 | return; | |
5794 | ||
5795 | rpc_call_start(task); | |
5796 | } | |
5797 | ||
5798 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) | |
5799 | { | |
5800 | switch(task->tk_status) { | |
5801 | case 0: | |
5802 | case -NFS4ERR_COMPLETE_ALREADY: | |
5803 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ | |
5804 | break; | |
5805 | case -NFS4ERR_DELAY: | |
5806 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5807 | /* fall through */ | |
5808 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
5809 | return -EAGAIN; | |
5810 | default: | |
5811 | nfs4_schedule_lease_recovery(clp); | |
5812 | } | |
5813 | return 0; | |
5814 | } | |
5815 | ||
5816 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) | |
5817 | { | |
5818 | struct nfs4_reclaim_complete_data *calldata = data; | |
5819 | struct nfs_client *clp = calldata->clp; | |
5820 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5821 | ||
5822 | dprintk("--> %s\n", __func__); | |
5823 | if (!nfs41_sequence_done(task, res)) | |
5824 | return; | |
5825 | ||
5826 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { | |
5827 | rpc_restart_call_prepare(task); | |
5828 | return; | |
5829 | } | |
5830 | dprintk("<-- %s\n", __func__); | |
5831 | } | |
5832 | ||
5833 | static void nfs4_free_reclaim_complete_data(void *data) | |
5834 | { | |
5835 | struct nfs4_reclaim_complete_data *calldata = data; | |
5836 | ||
5837 | kfree(calldata); | |
5838 | } | |
5839 | ||
5840 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5841 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5842 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5843 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5844 | }; | |
5845 | ||
5846 | /* | |
5847 | * Issue a global reclaim complete. | |
5848 | */ | |
5849 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5850 | { | |
5851 | struct nfs4_reclaim_complete_data *calldata; | |
5852 | struct rpc_task *task; | |
5853 | struct rpc_message msg = { | |
5854 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5855 | }; | |
5856 | struct rpc_task_setup task_setup_data = { | |
5857 | .rpc_client = clp->cl_rpcclient, | |
5858 | .rpc_message = &msg, | |
5859 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5860 | .flags = RPC_TASK_ASYNC, | |
5861 | }; | |
5862 | int status = -ENOMEM; | |
5863 | ||
5864 | dprintk("--> %s\n", __func__); | |
5865 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); | |
5866 | if (calldata == NULL) | |
5867 | goto out; | |
5868 | calldata->clp = clp; | |
5869 | calldata->arg.one_fs = 0; | |
5870 | ||
5871 | nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); | |
5872 | msg.rpc_argp = &calldata->arg; | |
5873 | msg.rpc_resp = &calldata->res; | |
5874 | task_setup_data.callback_data = calldata; | |
5875 | task = rpc_run_task(&task_setup_data); | |
5876 | if (IS_ERR(task)) { | |
5877 | status = PTR_ERR(task); | |
5878 | goto out; | |
5879 | } | |
5880 | status = nfs4_wait_for_completion_rpc_task(task); | |
5881 | if (status == 0) | |
5882 | status = task->tk_status; | |
5883 | rpc_put_task(task); | |
5884 | return 0; | |
5885 | out: | |
5886 | dprintk("<-- %s status=%d\n", __func__, status); | |
5887 | return status; | |
5888 | } | |
5889 | ||
5890 | static void | |
5891 | nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) | |
5892 | { | |
5893 | struct nfs4_layoutget *lgp = calldata; | |
5894 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); | |
5895 | ||
5896 | dprintk("--> %s\n", __func__); | |
5897 | /* Note the is a race here, where a CB_LAYOUTRECALL can come in | |
5898 | * right now covering the LAYOUTGET we are about to send. | |
5899 | * However, that is not so catastrophic, and there seems | |
5900 | * to be no way to prevent it completely. | |
5901 | */ | |
5902 | if (nfs4_setup_sequence(server, &lgp->args.seq_args, | |
5903 | &lgp->res.seq_res, task)) | |
5904 | return; | |
5905 | if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, | |
5906 | NFS_I(lgp->args.inode)->layout, | |
5907 | lgp->args.ctx->state)) { | |
5908 | rpc_exit(task, NFS4_OK); | |
5909 | return; | |
5910 | } | |
5911 | rpc_call_start(task); | |
5912 | } | |
5913 | ||
5914 | static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) | |
5915 | { | |
5916 | struct nfs4_layoutget *lgp = calldata; | |
5917 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); | |
5918 | ||
5919 | dprintk("--> %s\n", __func__); | |
5920 | ||
5921 | if (!nfs4_sequence_done(task, &lgp->res.seq_res)) | |
5922 | return; | |
5923 | ||
5924 | switch (task->tk_status) { | |
5925 | case 0: | |
5926 | break; | |
5927 | case -NFS4ERR_LAYOUTTRYLATER: | |
5928 | case -NFS4ERR_RECALLCONFLICT: | |
5929 | task->tk_status = -NFS4ERR_DELAY; | |
5930 | /* Fall through */ | |
5931 | default: | |
5932 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { | |
5933 | rpc_restart_call_prepare(task); | |
5934 | return; | |
5935 | } | |
5936 | } | |
5937 | dprintk("<-- %s\n", __func__); | |
5938 | } | |
5939 | ||
5940 | static void nfs4_layoutget_release(void *calldata) | |
5941 | { | |
5942 | struct nfs4_layoutget *lgp = calldata; | |
5943 | ||
5944 | dprintk("--> %s\n", __func__); | |
5945 | put_nfs_open_context(lgp->args.ctx); | |
5946 | kfree(calldata); | |
5947 | dprintk("<-- %s\n", __func__); | |
5948 | } | |
5949 | ||
5950 | static const struct rpc_call_ops nfs4_layoutget_call_ops = { | |
5951 | .rpc_call_prepare = nfs4_layoutget_prepare, | |
5952 | .rpc_call_done = nfs4_layoutget_done, | |
5953 | .rpc_release = nfs4_layoutget_release, | |
5954 | }; | |
5955 | ||
5956 | int nfs4_proc_layoutget(struct nfs4_layoutget *lgp) | |
5957 | { | |
5958 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); | |
5959 | struct rpc_task *task; | |
5960 | struct rpc_message msg = { | |
5961 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], | |
5962 | .rpc_argp = &lgp->args, | |
5963 | .rpc_resp = &lgp->res, | |
5964 | }; | |
5965 | struct rpc_task_setup task_setup_data = { | |
5966 | .rpc_client = server->client, | |
5967 | .rpc_message = &msg, | |
5968 | .callback_ops = &nfs4_layoutget_call_ops, | |
5969 | .callback_data = lgp, | |
5970 | .flags = RPC_TASK_ASYNC, | |
5971 | }; | |
5972 | int status = 0; | |
5973 | ||
5974 | dprintk("--> %s\n", __func__); | |
5975 | ||
5976 | lgp->res.layoutp = &lgp->args.layout; | |
5977 | lgp->res.seq_res.sr_slot = NULL; | |
5978 | nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); | |
5979 | task = rpc_run_task(&task_setup_data); | |
5980 | if (IS_ERR(task)) | |
5981 | return PTR_ERR(task); | |
5982 | status = nfs4_wait_for_completion_rpc_task(task); | |
5983 | if (status == 0) | |
5984 | status = task->tk_status; | |
5985 | if (status == 0) | |
5986 | status = pnfs_layout_process(lgp); | |
5987 | rpc_put_task(task); | |
5988 | dprintk("<-- %s status=%d\n", __func__, status); | |
5989 | return status; | |
5990 | } | |
5991 | ||
5992 | static void | |
5993 | nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) | |
5994 | { | |
5995 | struct nfs4_layoutreturn *lrp = calldata; | |
5996 | ||
5997 | dprintk("--> %s\n", __func__); | |
5998 | if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args, | |
5999 | &lrp->res.seq_res, task)) | |
6000 | return; | |
6001 | rpc_call_start(task); | |
6002 | } | |
6003 | ||
6004 | static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) | |
6005 | { | |
6006 | struct nfs4_layoutreturn *lrp = calldata; | |
6007 | struct nfs_server *server; | |
6008 | struct pnfs_layout_hdr *lo = lrp->args.layout; | |
6009 | ||
6010 | dprintk("--> %s\n", __func__); | |
6011 | ||
6012 | if (!nfs4_sequence_done(task, &lrp->res.seq_res)) | |
6013 | return; | |
6014 | ||
6015 | server = NFS_SERVER(lrp->args.inode); | |
6016 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { | |
6017 | rpc_restart_call_prepare(task); | |
6018 | return; | |
6019 | } | |
6020 | spin_lock(&lo->plh_inode->i_lock); | |
6021 | if (task->tk_status == 0) { | |
6022 | if (lrp->res.lrs_present) { | |
6023 | pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); | |
6024 | } else | |
6025 | BUG_ON(!list_empty(&lo->plh_segs)); | |
6026 | } | |
6027 | lo->plh_block_lgets--; | |
6028 | spin_unlock(&lo->plh_inode->i_lock); | |
6029 | dprintk("<-- %s\n", __func__); | |
6030 | } | |
6031 | ||
6032 | static void nfs4_layoutreturn_release(void *calldata) | |
6033 | { | |
6034 | struct nfs4_layoutreturn *lrp = calldata; | |
6035 | ||
6036 | dprintk("--> %s\n", __func__); | |
6037 | put_layout_hdr(lrp->args.layout); | |
6038 | kfree(calldata); | |
6039 | dprintk("<-- %s\n", __func__); | |
6040 | } | |
6041 | ||
6042 | static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { | |
6043 | .rpc_call_prepare = nfs4_layoutreturn_prepare, | |
6044 | .rpc_call_done = nfs4_layoutreturn_done, | |
6045 | .rpc_release = nfs4_layoutreturn_release, | |
6046 | }; | |
6047 | ||
6048 | int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) | |
6049 | { | |
6050 | struct rpc_task *task; | |
6051 | struct rpc_message msg = { | |
6052 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], | |
6053 | .rpc_argp = &lrp->args, | |
6054 | .rpc_resp = &lrp->res, | |
6055 | }; | |
6056 | struct rpc_task_setup task_setup_data = { | |
6057 | .rpc_client = lrp->clp->cl_rpcclient, | |
6058 | .rpc_message = &msg, | |
6059 | .callback_ops = &nfs4_layoutreturn_call_ops, | |
6060 | .callback_data = lrp, | |
6061 | }; | |
6062 | int status; | |
6063 | ||
6064 | dprintk("--> %s\n", __func__); | |
6065 | nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); | |
6066 | task = rpc_run_task(&task_setup_data); | |
6067 | if (IS_ERR(task)) | |
6068 | return PTR_ERR(task); | |
6069 | status = task->tk_status; | |
6070 | dprintk("<-- %s status=%d\n", __func__, status); | |
6071 | rpc_put_task(task); | |
6072 | return status; | |
6073 | } | |
6074 | ||
6075 | /* | |
6076 | * Retrieve the list of Data Server devices from the MDS. | |
6077 | */ | |
6078 | static int _nfs4_getdevicelist(struct nfs_server *server, | |
6079 | const struct nfs_fh *fh, | |
6080 | struct pnfs_devicelist *devlist) | |
6081 | { | |
6082 | struct nfs4_getdevicelist_args args = { | |
6083 | .fh = fh, | |
6084 | .layoutclass = server->pnfs_curr_ld->id, | |
6085 | }; | |
6086 | struct nfs4_getdevicelist_res res = { | |
6087 | .devlist = devlist, | |
6088 | }; | |
6089 | struct rpc_message msg = { | |
6090 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], | |
6091 | .rpc_argp = &args, | |
6092 | .rpc_resp = &res, | |
6093 | }; | |
6094 | int status; | |
6095 | ||
6096 | dprintk("--> %s\n", __func__); | |
6097 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, | |
6098 | &res.seq_res, 0); | |
6099 | dprintk("<-- %s status=%d\n", __func__, status); | |
6100 | return status; | |
6101 | } | |
6102 | ||
6103 | int nfs4_proc_getdevicelist(struct nfs_server *server, | |
6104 | const struct nfs_fh *fh, | |
6105 | struct pnfs_devicelist *devlist) | |
6106 | { | |
6107 | struct nfs4_exception exception = { }; | |
6108 | int err; | |
6109 | ||
6110 | do { | |
6111 | err = nfs4_handle_exception(server, | |
6112 | _nfs4_getdevicelist(server, fh, devlist), | |
6113 | &exception); | |
6114 | } while (exception.retry); | |
6115 | ||
6116 | dprintk("%s: err=%d, num_devs=%u\n", __func__, | |
6117 | err, devlist->num_devs); | |
6118 | ||
6119 | return err; | |
6120 | } | |
6121 | EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); | |
6122 | ||
6123 | static int | |
6124 | _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) | |
6125 | { | |
6126 | struct nfs4_getdeviceinfo_args args = { | |
6127 | .pdev = pdev, | |
6128 | }; | |
6129 | struct nfs4_getdeviceinfo_res res = { | |
6130 | .pdev = pdev, | |
6131 | }; | |
6132 | struct rpc_message msg = { | |
6133 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], | |
6134 | .rpc_argp = &args, | |
6135 | .rpc_resp = &res, | |
6136 | }; | |
6137 | int status; | |
6138 | ||
6139 | dprintk("--> %s\n", __func__); | |
6140 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
6141 | dprintk("<-- %s status=%d\n", __func__, status); | |
6142 | ||
6143 | return status; | |
6144 | } | |
6145 | ||
6146 | int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) | |
6147 | { | |
6148 | struct nfs4_exception exception = { }; | |
6149 | int err; | |
6150 | ||
6151 | do { | |
6152 | err = nfs4_handle_exception(server, | |
6153 | _nfs4_proc_getdeviceinfo(server, pdev), | |
6154 | &exception); | |
6155 | } while (exception.retry); | |
6156 | return err; | |
6157 | } | |
6158 | EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); | |
6159 | ||
6160 | static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) | |
6161 | { | |
6162 | struct nfs4_layoutcommit_data *data = calldata; | |
6163 | struct nfs_server *server = NFS_SERVER(data->args.inode); | |
6164 | ||
6165 | if (nfs4_setup_sequence(server, &data->args.seq_args, | |
6166 | &data->res.seq_res, task)) | |
6167 | return; | |
6168 | rpc_call_start(task); | |
6169 | } | |
6170 | ||
6171 | static void | |
6172 | nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) | |
6173 | { | |
6174 | struct nfs4_layoutcommit_data *data = calldata; | |
6175 | struct nfs_server *server = NFS_SERVER(data->args.inode); | |
6176 | ||
6177 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
6178 | return; | |
6179 | ||
6180 | switch (task->tk_status) { /* Just ignore these failures */ | |
6181 | case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ | |
6182 | case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ | |
6183 | case -NFS4ERR_BADLAYOUT: /* no layout */ | |
6184 | case -NFS4ERR_GRACE: /* loca_recalim always false */ | |
6185 | task->tk_status = 0; | |
6186 | break; | |
6187 | case 0: | |
6188 | nfs_post_op_update_inode_force_wcc(data->args.inode, | |
6189 | data->res.fattr); | |
6190 | break; | |
6191 | default: | |
6192 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { | |
6193 | rpc_restart_call_prepare(task); | |
6194 | return; | |
6195 | } | |
6196 | } | |
6197 | } | |
6198 | ||
6199 | static void nfs4_layoutcommit_release(void *calldata) | |
6200 | { | |
6201 | struct nfs4_layoutcommit_data *data = calldata; | |
6202 | struct pnfs_layout_segment *lseg, *tmp; | |
6203 | unsigned long *bitlock = &NFS_I(data->args.inode)->flags; | |
6204 | ||
6205 | pnfs_cleanup_layoutcommit(data); | |
6206 | /* Matched by references in pnfs_set_layoutcommit */ | |
6207 | list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) { | |
6208 | list_del_init(&lseg->pls_lc_list); | |
6209 | if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT, | |
6210 | &lseg->pls_flags)) | |
6211 | put_lseg(lseg); | |
6212 | } | |
6213 | ||
6214 | clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock); | |
6215 | smp_mb__after_clear_bit(); | |
6216 | wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING); | |
6217 | ||
6218 | put_rpccred(data->cred); | |
6219 | kfree(data); | |
6220 | } | |
6221 | ||
6222 | static const struct rpc_call_ops nfs4_layoutcommit_ops = { | |
6223 | .rpc_call_prepare = nfs4_layoutcommit_prepare, | |
6224 | .rpc_call_done = nfs4_layoutcommit_done, | |
6225 | .rpc_release = nfs4_layoutcommit_release, | |
6226 | }; | |
6227 | ||
6228 | int | |
6229 | nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) | |
6230 | { | |
6231 | struct rpc_message msg = { | |
6232 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], | |
6233 | .rpc_argp = &data->args, | |
6234 | .rpc_resp = &data->res, | |
6235 | .rpc_cred = data->cred, | |
6236 | }; | |
6237 | struct rpc_task_setup task_setup_data = { | |
6238 | .task = &data->task, | |
6239 | .rpc_client = NFS_CLIENT(data->args.inode), | |
6240 | .rpc_message = &msg, | |
6241 | .callback_ops = &nfs4_layoutcommit_ops, | |
6242 | .callback_data = data, | |
6243 | .flags = RPC_TASK_ASYNC, | |
6244 | }; | |
6245 | struct rpc_task *task; | |
6246 | int status = 0; | |
6247 | ||
6248 | dprintk("NFS: %4d initiating layoutcommit call. sync %d " | |
6249 | "lbw: %llu inode %lu\n", | |
6250 | data->task.tk_pid, sync, | |
6251 | data->args.lastbytewritten, | |
6252 | data->args.inode->i_ino); | |
6253 | ||
6254 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
6255 | task = rpc_run_task(&task_setup_data); | |
6256 | if (IS_ERR(task)) | |
6257 | return PTR_ERR(task); | |
6258 | if (sync == false) | |
6259 | goto out; | |
6260 | status = nfs4_wait_for_completion_rpc_task(task); | |
6261 | if (status != 0) | |
6262 | goto out; | |
6263 | status = task->tk_status; | |
6264 | out: | |
6265 | dprintk("%s: status %d\n", __func__, status); | |
6266 | rpc_put_task(task); | |
6267 | return status; | |
6268 | } | |
6269 | ||
6270 | static int | |
6271 | _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, | |
6272 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) | |
6273 | { | |
6274 | struct nfs41_secinfo_no_name_args args = { | |
6275 | .style = SECINFO_STYLE_CURRENT_FH, | |
6276 | }; | |
6277 | struct nfs4_secinfo_res res = { | |
6278 | .flavors = flavors, | |
6279 | }; | |
6280 | struct rpc_message msg = { | |
6281 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], | |
6282 | .rpc_argp = &args, | |
6283 | .rpc_resp = &res, | |
6284 | }; | |
6285 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
6286 | } | |
6287 | ||
6288 | static int | |
6289 | nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, | |
6290 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) | |
6291 | { | |
6292 | struct nfs4_exception exception = { }; | |
6293 | int err; | |
6294 | do { | |
6295 | err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); | |
6296 | switch (err) { | |
6297 | case 0: | |
6298 | case -NFS4ERR_WRONGSEC: | |
6299 | case -NFS4ERR_NOTSUPP: | |
6300 | goto out; | |
6301 | default: | |
6302 | err = nfs4_handle_exception(server, err, &exception); | |
6303 | } | |
6304 | } while (exception.retry); | |
6305 | out: | |
6306 | return err; | |
6307 | } | |
6308 | ||
6309 | static int | |
6310 | nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
6311 | struct nfs_fsinfo *info) | |
6312 | { | |
6313 | int err; | |
6314 | struct page *page; | |
6315 | rpc_authflavor_t flavor; | |
6316 | struct nfs4_secinfo_flavors *flavors; | |
6317 | ||
6318 | page = alloc_page(GFP_KERNEL); | |
6319 | if (!page) { | |
6320 | err = -ENOMEM; | |
6321 | goto out; | |
6322 | } | |
6323 | ||
6324 | flavors = page_address(page); | |
6325 | err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); | |
6326 | ||
6327 | /* | |
6328 | * Fall back on "guess and check" method if | |
6329 | * the server doesn't support SECINFO_NO_NAME | |
6330 | */ | |
6331 | if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) { | |
6332 | err = nfs4_find_root_sec(server, fhandle, info); | |
6333 | goto out_freepage; | |
6334 | } | |
6335 | if (err) | |
6336 | goto out_freepage; | |
6337 | ||
6338 | flavor = nfs_find_best_sec(flavors); | |
6339 | if (err == 0) | |
6340 | err = nfs4_lookup_root_sec(server, fhandle, info, flavor); | |
6341 | ||
6342 | out_freepage: | |
6343 | put_page(page); | |
6344 | if (err == -EACCES) | |
6345 | return -EPERM; | |
6346 | out: | |
6347 | return err; | |
6348 | } | |
6349 | ||
6350 | static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6351 | { | |
6352 | int status; | |
6353 | struct nfs41_test_stateid_args args = { | |
6354 | .stateid = stateid, | |
6355 | }; | |
6356 | struct nfs41_test_stateid_res res; | |
6357 | struct rpc_message msg = { | |
6358 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], | |
6359 | .rpc_argp = &args, | |
6360 | .rpc_resp = &res, | |
6361 | }; | |
6362 | ||
6363 | nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); | |
6364 | status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); | |
6365 | ||
6366 | if (status == NFS_OK) | |
6367 | return res.status; | |
6368 | return status; | |
6369 | } | |
6370 | ||
6371 | static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6372 | { | |
6373 | struct nfs4_exception exception = { }; | |
6374 | int err; | |
6375 | do { | |
6376 | err = nfs4_handle_exception(server, | |
6377 | _nfs41_test_stateid(server, stateid), | |
6378 | &exception); | |
6379 | } while (exception.retry); | |
6380 | return err; | |
6381 | } | |
6382 | ||
6383 | static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6384 | { | |
6385 | struct nfs41_free_stateid_args args = { | |
6386 | .stateid = stateid, | |
6387 | }; | |
6388 | struct nfs41_free_stateid_res res; | |
6389 | struct rpc_message msg = { | |
6390 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], | |
6391 | .rpc_argp = &args, | |
6392 | .rpc_resp = &res, | |
6393 | }; | |
6394 | ||
6395 | nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); | |
6396 | return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); | |
6397 | } | |
6398 | ||
6399 | static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6400 | { | |
6401 | struct nfs4_exception exception = { }; | |
6402 | int err; | |
6403 | do { | |
6404 | err = nfs4_handle_exception(server, | |
6405 | _nfs4_free_stateid(server, stateid), | |
6406 | &exception); | |
6407 | } while (exception.retry); | |
6408 | return err; | |
6409 | } | |
6410 | ||
6411 | static bool nfs41_match_stateid(const nfs4_stateid *s1, | |
6412 | const nfs4_stateid *s2) | |
6413 | { | |
6414 | if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) | |
6415 | return false; | |
6416 | ||
6417 | if (s1->seqid == s2->seqid) | |
6418 | return true; | |
6419 | if (s1->seqid == 0 || s2->seqid == 0) | |
6420 | return true; | |
6421 | ||
6422 | return false; | |
6423 | } | |
6424 | ||
6425 | #endif /* CONFIG_NFS_V4_1 */ | |
6426 | ||
6427 | static bool nfs4_match_stateid(const nfs4_stateid *s1, | |
6428 | const nfs4_stateid *s2) | |
6429 | { | |
6430 | return nfs4_stateid_match(s1, s2); | |
6431 | } | |
6432 | ||
6433 | ||
6434 | static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { | |
6435 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
6436 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
6437 | .recover_open = nfs4_open_reclaim, | |
6438 | .recover_lock = nfs4_lock_reclaim, | |
6439 | .establish_clid = nfs4_init_clientid, | |
6440 | .get_clid_cred = nfs4_get_setclientid_cred, | |
6441 | }; | |
6442 | ||
6443 | #if defined(CONFIG_NFS_V4_1) | |
6444 | static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
6445 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
6446 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
6447 | .recover_open = nfs4_open_reclaim, | |
6448 | .recover_lock = nfs4_lock_reclaim, | |
6449 | .establish_clid = nfs41_init_clientid, | |
6450 | .get_clid_cred = nfs4_get_exchange_id_cred, | |
6451 | .reclaim_complete = nfs41_proc_reclaim_complete, | |
6452 | }; | |
6453 | #endif /* CONFIG_NFS_V4_1 */ | |
6454 | ||
6455 | static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
6456 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
6457 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
6458 | .recover_open = nfs4_open_expired, | |
6459 | .recover_lock = nfs4_lock_expired, | |
6460 | .establish_clid = nfs4_init_clientid, | |
6461 | .get_clid_cred = nfs4_get_setclientid_cred, | |
6462 | }; | |
6463 | ||
6464 | #if defined(CONFIG_NFS_V4_1) | |
6465 | static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
6466 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
6467 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
6468 | .recover_open = nfs41_open_expired, | |
6469 | .recover_lock = nfs41_lock_expired, | |
6470 | .establish_clid = nfs41_init_clientid, | |
6471 | .get_clid_cred = nfs4_get_exchange_id_cred, | |
6472 | }; | |
6473 | #endif /* CONFIG_NFS_V4_1 */ | |
6474 | ||
6475 | static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { | |
6476 | .sched_state_renewal = nfs4_proc_async_renew, | |
6477 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, | |
6478 | .renew_lease = nfs4_proc_renew, | |
6479 | }; | |
6480 | ||
6481 | #if defined(CONFIG_NFS_V4_1) | |
6482 | static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
6483 | .sched_state_renewal = nfs41_proc_async_sequence, | |
6484 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, | |
6485 | .renew_lease = nfs4_proc_sequence, | |
6486 | }; | |
6487 | #endif | |
6488 | ||
6489 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { | |
6490 | .minor_version = 0, | |
6491 | .call_sync = _nfs4_call_sync, | |
6492 | .match_stateid = nfs4_match_stateid, | |
6493 | .find_root_sec = nfs4_find_root_sec, | |
6494 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, | |
6495 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, | |
6496 | .state_renewal_ops = &nfs40_state_renewal_ops, | |
6497 | }; | |
6498 | ||
6499 | #if defined(CONFIG_NFS_V4_1) | |
6500 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { | |
6501 | .minor_version = 1, | |
6502 | .call_sync = _nfs4_call_sync_session, | |
6503 | .match_stateid = nfs41_match_stateid, | |
6504 | .find_root_sec = nfs41_find_root_sec, | |
6505 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, | |
6506 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, | |
6507 | .state_renewal_ops = &nfs41_state_renewal_ops, | |
6508 | }; | |
6509 | #endif | |
6510 | ||
6511 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { | |
6512 | [0] = &nfs_v4_0_minor_ops, | |
6513 | #if defined(CONFIG_NFS_V4_1) | |
6514 | [1] = &nfs_v4_1_minor_ops, | |
6515 | #endif | |
6516 | }; | |
6517 | ||
6518 | static const struct inode_operations nfs4_file_inode_operations = { | |
6519 | .permission = nfs_permission, | |
6520 | .getattr = nfs_getattr, | |
6521 | .setattr = nfs_setattr, | |
6522 | .getxattr = generic_getxattr, | |
6523 | .setxattr = generic_setxattr, | |
6524 | .listxattr = generic_listxattr, | |
6525 | .removexattr = generic_removexattr, | |
6526 | }; | |
6527 | ||
6528 | const struct nfs_rpc_ops nfs_v4_clientops = { | |
6529 | .version = 4, /* protocol version */ | |
6530 | .dentry_ops = &nfs4_dentry_operations, | |
6531 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6532 | .file_inode_ops = &nfs4_file_inode_operations, | |
6533 | .file_ops = &nfs4_file_operations, | |
6534 | .getroot = nfs4_proc_get_root, | |
6535 | .submount = nfs4_submount, | |
6536 | .getattr = nfs4_proc_getattr, | |
6537 | .setattr = nfs4_proc_setattr, | |
6538 | .lookup = nfs4_proc_lookup, | |
6539 | .access = nfs4_proc_access, | |
6540 | .readlink = nfs4_proc_readlink, | |
6541 | .create = nfs4_proc_create, | |
6542 | .remove = nfs4_proc_remove, | |
6543 | .unlink_setup = nfs4_proc_unlink_setup, | |
6544 | .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, | |
6545 | .unlink_done = nfs4_proc_unlink_done, | |
6546 | .rename = nfs4_proc_rename, | |
6547 | .rename_setup = nfs4_proc_rename_setup, | |
6548 | .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, | |
6549 | .rename_done = nfs4_proc_rename_done, | |
6550 | .link = nfs4_proc_link, | |
6551 | .symlink = nfs4_proc_symlink, | |
6552 | .mkdir = nfs4_proc_mkdir, | |
6553 | .rmdir = nfs4_proc_remove, | |
6554 | .readdir = nfs4_proc_readdir, | |
6555 | .mknod = nfs4_proc_mknod, | |
6556 | .statfs = nfs4_proc_statfs, | |
6557 | .fsinfo = nfs4_proc_fsinfo, | |
6558 | .pathconf = nfs4_proc_pathconf, | |
6559 | .set_capabilities = nfs4_server_capabilities, | |
6560 | .decode_dirent = nfs4_decode_dirent, | |
6561 | .read_setup = nfs4_proc_read_setup, | |
6562 | .read_rpc_prepare = nfs4_proc_read_rpc_prepare, | |
6563 | .read_done = nfs4_read_done, | |
6564 | .write_setup = nfs4_proc_write_setup, | |
6565 | .write_rpc_prepare = nfs4_proc_write_rpc_prepare, | |
6566 | .write_done = nfs4_write_done, | |
6567 | .commit_setup = nfs4_proc_commit_setup, | |
6568 | .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, | |
6569 | .commit_done = nfs4_commit_done, | |
6570 | .lock = nfs4_proc_lock, | |
6571 | .clear_acl_cache = nfs4_zap_acl_attr, | |
6572 | .close_context = nfs4_close_context, | |
6573 | .open_context = nfs4_atomic_open, | |
6574 | .init_client = nfs4_init_client, | |
6575 | }; | |
6576 | ||
6577 | static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { | |
6578 | .prefix = XATTR_NAME_NFSV4_ACL, | |
6579 | .list = nfs4_xattr_list_nfs4_acl, | |
6580 | .get = nfs4_xattr_get_nfs4_acl, | |
6581 | .set = nfs4_xattr_set_nfs4_acl, | |
6582 | }; | |
6583 | ||
6584 | const struct xattr_handler *nfs4_xattr_handlers[] = { | |
6585 | &nfs4_xattr_nfs4_acl_handler, | |
6586 | NULL | |
6587 | }; | |
6588 | ||
6589 | module_param(max_session_slots, ushort, 0644); | |
6590 | MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 " | |
6591 | "requests the client will negotiate"); | |
6592 | ||
6593 | /* | |
6594 | * Local variables: | |
6595 | * c-basic-offset: 8 | |
6596 | * End: | |
6597 | */ |