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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/nfs.h> | |
47 | #include <linux/nfs4.h> | |
48 | #include <linux/nfs_fs.h> | |
49 | #include <linux/nfs_page.h> | |
50 | #include <linux/nfs_mount.h> | |
51 | #include <linux/namei.h> | |
52 | #include <linux/mount.h> | |
53 | #include <linux/module.h> | |
54 | #include <linux/nfs_idmap.h> | |
55 | #include <linux/xattr.h> | |
56 | #include <linux/utsname.h> | |
57 | #include <linux/freezer.h> | |
58 | ||
59 | #include "nfs4_fs.h" | |
60 | #include "delegation.h" | |
61 | #include "internal.h" | |
62 | #include "iostat.h" | |
63 | #include "callback.h" | |
64 | #include "pnfs.h" | |
65 | #include "netns.h" | |
66 | #include "nfs4session.h" | |
67 | #include "fscache.h" | |
68 | ||
69 | #define NFSDBG_FACILITY NFSDBG_PROC | |
70 | ||
71 | #define NFS4_POLL_RETRY_MIN (HZ/10) | |
72 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
73 | ||
74 | struct nfs4_opendata; | |
75 | static int _nfs4_proc_open(struct nfs4_opendata *data); | |
76 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); | |
77 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); | |
78 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); | |
79 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); | |
80 | static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *); | |
81 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
82 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
83 | struct nfs_fattr *fattr, struct iattr *sattr, | |
84 | struct nfs4_state *state); | |
85 | #ifdef CONFIG_NFS_V4_1 | |
86 | static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *); | |
87 | static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *); | |
88 | #endif | |
89 | /* Prevent leaks of NFSv4 errors into userland */ | |
90 | static int nfs4_map_errors(int err) | |
91 | { | |
92 | if (err >= -1000) | |
93 | return err; | |
94 | switch (err) { | |
95 | case -NFS4ERR_RESOURCE: | |
96 | case -NFS4ERR_LAYOUTTRYLATER: | |
97 | case -NFS4ERR_RECALLCONFLICT: | |
98 | return -EREMOTEIO; | |
99 | case -NFS4ERR_WRONGSEC: | |
100 | return -EPERM; | |
101 | case -NFS4ERR_BADOWNER: | |
102 | case -NFS4ERR_BADNAME: | |
103 | return -EINVAL; | |
104 | case -NFS4ERR_SHARE_DENIED: | |
105 | return -EACCES; | |
106 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
107 | return -EPROTONOSUPPORT; | |
108 | case -NFS4ERR_ACCESS: | |
109 | return -EACCES; | |
110 | default: | |
111 | dprintk("%s could not handle NFSv4 error %d\n", | |
112 | __func__, -err); | |
113 | break; | |
114 | } | |
115 | return -EIO; | |
116 | } | |
117 | ||
118 | /* | |
119 | * This is our standard bitmap for GETATTR requests. | |
120 | */ | |
121 | const u32 nfs4_fattr_bitmap[3] = { | |
122 | FATTR4_WORD0_TYPE | |
123 | | FATTR4_WORD0_CHANGE | |
124 | | FATTR4_WORD0_SIZE | |
125 | | FATTR4_WORD0_FSID | |
126 | | FATTR4_WORD0_FILEID, | |
127 | FATTR4_WORD1_MODE | |
128 | | FATTR4_WORD1_NUMLINKS | |
129 | | FATTR4_WORD1_OWNER | |
130 | | FATTR4_WORD1_OWNER_GROUP | |
131 | | FATTR4_WORD1_RAWDEV | |
132 | | FATTR4_WORD1_SPACE_USED | |
133 | | FATTR4_WORD1_TIME_ACCESS | |
134 | | FATTR4_WORD1_TIME_METADATA | |
135 | | FATTR4_WORD1_TIME_MODIFY | |
136 | }; | |
137 | ||
138 | static const u32 nfs4_pnfs_open_bitmap[3] = { | |
139 | FATTR4_WORD0_TYPE | |
140 | | FATTR4_WORD0_CHANGE | |
141 | | FATTR4_WORD0_SIZE | |
142 | | FATTR4_WORD0_FSID | |
143 | | FATTR4_WORD0_FILEID, | |
144 | FATTR4_WORD1_MODE | |
145 | | FATTR4_WORD1_NUMLINKS | |
146 | | FATTR4_WORD1_OWNER | |
147 | | FATTR4_WORD1_OWNER_GROUP | |
148 | | FATTR4_WORD1_RAWDEV | |
149 | | FATTR4_WORD1_SPACE_USED | |
150 | | FATTR4_WORD1_TIME_ACCESS | |
151 | | FATTR4_WORD1_TIME_METADATA | |
152 | | FATTR4_WORD1_TIME_MODIFY, | |
153 | FATTR4_WORD2_MDSTHRESHOLD | |
154 | }; | |
155 | ||
156 | static const u32 nfs4_open_noattr_bitmap[3] = { | |
157 | FATTR4_WORD0_TYPE | |
158 | | FATTR4_WORD0_CHANGE | |
159 | | FATTR4_WORD0_FILEID, | |
160 | }; | |
161 | ||
162 | const u32 nfs4_statfs_bitmap[2] = { | |
163 | FATTR4_WORD0_FILES_AVAIL | |
164 | | FATTR4_WORD0_FILES_FREE | |
165 | | FATTR4_WORD0_FILES_TOTAL, | |
166 | FATTR4_WORD1_SPACE_AVAIL | |
167 | | FATTR4_WORD1_SPACE_FREE | |
168 | | FATTR4_WORD1_SPACE_TOTAL | |
169 | }; | |
170 | ||
171 | const u32 nfs4_pathconf_bitmap[2] = { | |
172 | FATTR4_WORD0_MAXLINK | |
173 | | FATTR4_WORD0_MAXNAME, | |
174 | 0 | |
175 | }; | |
176 | ||
177 | const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE | |
178 | | FATTR4_WORD0_MAXREAD | |
179 | | FATTR4_WORD0_MAXWRITE | |
180 | | FATTR4_WORD0_LEASE_TIME, | |
181 | FATTR4_WORD1_TIME_DELTA | |
182 | | FATTR4_WORD1_FS_LAYOUT_TYPES, | |
183 | FATTR4_WORD2_LAYOUT_BLKSIZE | |
184 | }; | |
185 | ||
186 | const u32 nfs4_fs_locations_bitmap[2] = { | |
187 | FATTR4_WORD0_TYPE | |
188 | | FATTR4_WORD0_CHANGE | |
189 | | FATTR4_WORD0_SIZE | |
190 | | FATTR4_WORD0_FSID | |
191 | | FATTR4_WORD0_FILEID | |
192 | | FATTR4_WORD0_FS_LOCATIONS, | |
193 | FATTR4_WORD1_MODE | |
194 | | FATTR4_WORD1_NUMLINKS | |
195 | | FATTR4_WORD1_OWNER | |
196 | | FATTR4_WORD1_OWNER_GROUP | |
197 | | FATTR4_WORD1_RAWDEV | |
198 | | FATTR4_WORD1_SPACE_USED | |
199 | | FATTR4_WORD1_TIME_ACCESS | |
200 | | FATTR4_WORD1_TIME_METADATA | |
201 | | FATTR4_WORD1_TIME_MODIFY | |
202 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
203 | }; | |
204 | ||
205 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, | |
206 | struct nfs4_readdir_arg *readdir) | |
207 | { | |
208 | __be32 *start, *p; | |
209 | ||
210 | if (cookie > 2) { | |
211 | readdir->cookie = cookie; | |
212 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); | |
213 | return; | |
214 | } | |
215 | ||
216 | readdir->cookie = 0; | |
217 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
218 | if (cookie == 2) | |
219 | return; | |
220 | ||
221 | /* | |
222 | * NFSv4 servers do not return entries for '.' and '..' | |
223 | * Therefore, we fake these entries here. We let '.' | |
224 | * have cookie 0 and '..' have cookie 1. Note that | |
225 | * when talking to the server, we always send cookie 0 | |
226 | * instead of 1 or 2. | |
227 | */ | |
228 | start = p = kmap_atomic(*readdir->pages); | |
229 | ||
230 | if (cookie == 0) { | |
231 | *p++ = xdr_one; /* next */ | |
232 | *p++ = xdr_zero; /* cookie, first word */ | |
233 | *p++ = xdr_one; /* cookie, second word */ | |
234 | *p++ = xdr_one; /* entry len */ | |
235 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
236 | p++; | |
237 | *p++ = xdr_one; /* bitmap length */ | |
238 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
239 | *p++ = htonl(8); /* attribute buffer length */ | |
240 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); | |
241 | } | |
242 | ||
243 | *p++ = xdr_one; /* next */ | |
244 | *p++ = xdr_zero; /* cookie, first word */ | |
245 | *p++ = xdr_two; /* cookie, second word */ | |
246 | *p++ = xdr_two; /* entry len */ | |
247 | memcpy(p, "..\0\0", 4); /* entry */ | |
248 | p++; | |
249 | *p++ = xdr_one; /* bitmap length */ | |
250 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
251 | *p++ = htonl(8); /* attribute buffer length */ | |
252 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); | |
253 | ||
254 | readdir->pgbase = (char *)p - (char *)start; | |
255 | readdir->count -= readdir->pgbase; | |
256 | kunmap_atomic(start); | |
257 | } | |
258 | ||
259 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
260 | { | |
261 | int res = 0; | |
262 | ||
263 | might_sleep(); | |
264 | ||
265 | if (*timeout <= 0) | |
266 | *timeout = NFS4_POLL_RETRY_MIN; | |
267 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
268 | *timeout = NFS4_POLL_RETRY_MAX; | |
269 | freezable_schedule_timeout_killable(*timeout); | |
270 | if (fatal_signal_pending(current)) | |
271 | res = -ERESTARTSYS; | |
272 | *timeout <<= 1; | |
273 | return res; | |
274 | } | |
275 | ||
276 | /* This is the error handling routine for processes that are allowed | |
277 | * to sleep. | |
278 | */ | |
279 | static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
280 | { | |
281 | struct nfs_client *clp = server->nfs_client; | |
282 | struct nfs4_state *state = exception->state; | |
283 | struct inode *inode = exception->inode; | |
284 | int ret = errorcode; | |
285 | ||
286 | exception->retry = 0; | |
287 | switch(errorcode) { | |
288 | case 0: | |
289 | return 0; | |
290 | case -NFS4ERR_OPENMODE: | |
291 | if (inode && nfs4_have_delegation(inode, FMODE_READ)) { | |
292 | nfs4_inode_return_delegation(inode); | |
293 | exception->retry = 1; | |
294 | return 0; | |
295 | } | |
296 | if (state == NULL) | |
297 | break; | |
298 | nfs4_schedule_stateid_recovery(server, state); | |
299 | goto wait_on_recovery; | |
300 | case -NFS4ERR_DELEG_REVOKED: | |
301 | case -NFS4ERR_ADMIN_REVOKED: | |
302 | case -NFS4ERR_BAD_STATEID: | |
303 | if (state == NULL) | |
304 | break; | |
305 | nfs_remove_bad_delegation(state->inode); | |
306 | nfs4_schedule_stateid_recovery(server, state); | |
307 | goto wait_on_recovery; | |
308 | case -NFS4ERR_EXPIRED: | |
309 | if (state != NULL) | |
310 | nfs4_schedule_stateid_recovery(server, state); | |
311 | case -NFS4ERR_STALE_STATEID: | |
312 | case -NFS4ERR_STALE_CLIENTID: | |
313 | nfs4_schedule_lease_recovery(clp); | |
314 | goto wait_on_recovery; | |
315 | #if defined(CONFIG_NFS_V4_1) | |
316 | case -NFS4ERR_BADSESSION: | |
317 | case -NFS4ERR_BADSLOT: | |
318 | case -NFS4ERR_BAD_HIGH_SLOT: | |
319 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
320 | case -NFS4ERR_DEADSESSION: | |
321 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
322 | case -NFS4ERR_SEQ_MISORDERED: | |
323 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
324 | errorcode); | |
325 | nfs4_schedule_session_recovery(clp->cl_session, errorcode); | |
326 | goto wait_on_recovery; | |
327 | #endif /* defined(CONFIG_NFS_V4_1) */ | |
328 | case -NFS4ERR_FILE_OPEN: | |
329 | if (exception->timeout > HZ) { | |
330 | /* We have retried a decent amount, time to | |
331 | * fail | |
332 | */ | |
333 | ret = -EBUSY; | |
334 | break; | |
335 | } | |
336 | case -NFS4ERR_GRACE: | |
337 | case -NFS4ERR_DELAY: | |
338 | ret = nfs4_delay(server->client, &exception->timeout); | |
339 | if (ret != 0) | |
340 | break; | |
341 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
342 | case -NFS4ERR_OLD_STATEID: | |
343 | exception->retry = 1; | |
344 | break; | |
345 | case -NFS4ERR_BADOWNER: | |
346 | /* The following works around a Linux server bug! */ | |
347 | case -NFS4ERR_BADNAME: | |
348 | if (server->caps & NFS_CAP_UIDGID_NOMAP) { | |
349 | server->caps &= ~NFS_CAP_UIDGID_NOMAP; | |
350 | exception->retry = 1; | |
351 | printk(KERN_WARNING "NFS: v4 server %s " | |
352 | "does not accept raw " | |
353 | "uid/gids. " | |
354 | "Reenabling the idmapper.\n", | |
355 | server->nfs_client->cl_hostname); | |
356 | } | |
357 | } | |
358 | /* We failed to handle the error */ | |
359 | return nfs4_map_errors(ret); | |
360 | wait_on_recovery: | |
361 | ret = nfs4_wait_clnt_recover(clp); | |
362 | if (ret == 0) | |
363 | exception->retry = 1; | |
364 | return ret; | |
365 | } | |
366 | ||
367 | ||
368 | static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) | |
369 | { | |
370 | spin_lock(&clp->cl_lock); | |
371 | if (time_before(clp->cl_last_renewal,timestamp)) | |
372 | clp->cl_last_renewal = timestamp; | |
373 | spin_unlock(&clp->cl_lock); | |
374 | } | |
375 | ||
376 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) | |
377 | { | |
378 | do_renew_lease(server->nfs_client, timestamp); | |
379 | } | |
380 | ||
381 | #if defined(CONFIG_NFS_V4_1) | |
382 | ||
383 | static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) | |
384 | { | |
385 | struct nfs4_session *session; | |
386 | struct nfs4_slot_table *tbl; | |
387 | bool send_new_highest_used_slotid = false; | |
388 | ||
389 | if (!res->sr_slot) { | |
390 | /* just wake up the next guy waiting since | |
391 | * we may have not consumed a slot after all */ | |
392 | dprintk("%s: No slot\n", __func__); | |
393 | return; | |
394 | } | |
395 | tbl = res->sr_slot->table; | |
396 | session = tbl->session; | |
397 | ||
398 | spin_lock(&tbl->slot_tbl_lock); | |
399 | /* Be nice to the server: try to ensure that the last transmitted | |
400 | * value for highest_user_slotid <= target_highest_slotid | |
401 | */ | |
402 | if (tbl->highest_used_slotid > tbl->target_highest_slotid) | |
403 | send_new_highest_used_slotid = true; | |
404 | ||
405 | if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) { | |
406 | send_new_highest_used_slotid = false; | |
407 | goto out_unlock; | |
408 | } | |
409 | nfs4_free_slot(tbl, res->sr_slot); | |
410 | ||
411 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) | |
412 | send_new_highest_used_slotid = false; | |
413 | out_unlock: | |
414 | spin_unlock(&tbl->slot_tbl_lock); | |
415 | res->sr_slot = NULL; | |
416 | if (send_new_highest_used_slotid) | |
417 | nfs41_server_notify_highest_slotid_update(session->clp); | |
418 | } | |
419 | ||
420 | static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) | |
421 | { | |
422 | struct nfs4_session *session; | |
423 | struct nfs4_slot *slot; | |
424 | struct nfs_client *clp; | |
425 | bool interrupted = false; | |
426 | int ret = 1; | |
427 | ||
428 | /* don't increment the sequence number if the task wasn't sent */ | |
429 | if (!RPC_WAS_SENT(task)) | |
430 | goto out; | |
431 | ||
432 | slot = res->sr_slot; | |
433 | session = slot->table->session; | |
434 | ||
435 | if (slot->interrupted) { | |
436 | slot->interrupted = 0; | |
437 | interrupted = true; | |
438 | } | |
439 | ||
440 | /* Check the SEQUENCE operation status */ | |
441 | switch (res->sr_status) { | |
442 | case 0: | |
443 | /* Update the slot's sequence and clientid lease timer */ | |
444 | ++slot->seq_nr; | |
445 | clp = session->clp; | |
446 | do_renew_lease(clp, res->sr_timestamp); | |
447 | /* Check sequence flags */ | |
448 | if (res->sr_status_flags != 0) | |
449 | nfs4_schedule_lease_recovery(clp); | |
450 | nfs41_update_target_slotid(slot->table, slot, res); | |
451 | break; | |
452 | case 1: | |
453 | /* | |
454 | * sr_status remains 1 if an RPC level error occurred. | |
455 | * The server may or may not have processed the sequence | |
456 | * operation.. | |
457 | * Mark the slot as having hosted an interrupted RPC call. | |
458 | */ | |
459 | slot->interrupted = 1; | |
460 | goto out; | |
461 | case -NFS4ERR_DELAY: | |
462 | /* The server detected a resend of the RPC call and | |
463 | * returned NFS4ERR_DELAY as per Section 2.10.6.2 | |
464 | * of RFC5661. | |
465 | */ | |
466 | dprintk("%s: slot=%u seq=%u: Operation in progress\n", | |
467 | __func__, | |
468 | slot->slot_nr, | |
469 | slot->seq_nr); | |
470 | goto out_retry; | |
471 | case -NFS4ERR_BADSLOT: | |
472 | /* | |
473 | * The slot id we used was probably retired. Try again | |
474 | * using a different slot id. | |
475 | */ | |
476 | goto retry_nowait; | |
477 | case -NFS4ERR_SEQ_MISORDERED: | |
478 | /* | |
479 | * Was the last operation on this sequence interrupted? | |
480 | * If so, retry after bumping the sequence number. | |
481 | */ | |
482 | if (interrupted) { | |
483 | ++slot->seq_nr; | |
484 | goto retry_nowait; | |
485 | } | |
486 | /* | |
487 | * Could this slot have been previously retired? | |
488 | * If so, then the server may be expecting seq_nr = 1! | |
489 | */ | |
490 | if (slot->seq_nr != 1) { | |
491 | slot->seq_nr = 1; | |
492 | goto retry_nowait; | |
493 | } | |
494 | break; | |
495 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
496 | ++slot->seq_nr; | |
497 | goto retry_nowait; | |
498 | default: | |
499 | /* Just update the slot sequence no. */ | |
500 | ++slot->seq_nr; | |
501 | } | |
502 | out: | |
503 | /* The session may be reset by one of the error handlers. */ | |
504 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
505 | nfs41_sequence_free_slot(res); | |
506 | return ret; | |
507 | retry_nowait: | |
508 | if (rpc_restart_call_prepare(task)) { | |
509 | task->tk_status = 0; | |
510 | ret = 0; | |
511 | } | |
512 | goto out; | |
513 | out_retry: | |
514 | if (!rpc_restart_call(task)) | |
515 | goto out; | |
516 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static int nfs4_sequence_done(struct rpc_task *task, | |
521 | struct nfs4_sequence_res *res) | |
522 | { | |
523 | if (res->sr_slot == NULL) | |
524 | return 1; | |
525 | return nfs41_sequence_done(task, res); | |
526 | } | |
527 | ||
528 | static void nfs41_init_sequence(struct nfs4_sequence_args *args, | |
529 | struct nfs4_sequence_res *res, int cache_reply) | |
530 | { | |
531 | args->sa_slot = NULL; | |
532 | args->sa_cache_this = 0; | |
533 | args->sa_privileged = 0; | |
534 | if (cache_reply) | |
535 | args->sa_cache_this = 1; | |
536 | res->sr_slot = NULL; | |
537 | } | |
538 | ||
539 | static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) | |
540 | { | |
541 | args->sa_privileged = 1; | |
542 | } | |
543 | ||
544 | int nfs41_setup_sequence(struct nfs4_session *session, | |
545 | struct nfs4_sequence_args *args, | |
546 | struct nfs4_sequence_res *res, | |
547 | struct rpc_task *task) | |
548 | { | |
549 | struct nfs4_slot *slot; | |
550 | struct nfs4_slot_table *tbl; | |
551 | ||
552 | dprintk("--> %s\n", __func__); | |
553 | /* slot already allocated? */ | |
554 | if (res->sr_slot != NULL) | |
555 | goto out_success; | |
556 | ||
557 | tbl = &session->fc_slot_table; | |
558 | ||
559 | task->tk_timeout = 0; | |
560 | ||
561 | spin_lock(&tbl->slot_tbl_lock); | |
562 | if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) && | |
563 | !args->sa_privileged) { | |
564 | /* The state manager will wait until the slot table is empty */ | |
565 | dprintk("%s session is draining\n", __func__); | |
566 | goto out_sleep; | |
567 | } | |
568 | ||
569 | slot = nfs4_alloc_slot(tbl); | |
570 | if (IS_ERR(slot)) { | |
571 | /* If out of memory, try again in 1/4 second */ | |
572 | if (slot == ERR_PTR(-ENOMEM)) | |
573 | task->tk_timeout = HZ >> 2; | |
574 | dprintk("<-- %s: no free slots\n", __func__); | |
575 | goto out_sleep; | |
576 | } | |
577 | spin_unlock(&tbl->slot_tbl_lock); | |
578 | ||
579 | args->sa_slot = slot; | |
580 | ||
581 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, | |
582 | slot->slot_nr, slot->seq_nr); | |
583 | ||
584 | res->sr_slot = slot; | |
585 | res->sr_timestamp = jiffies; | |
586 | res->sr_status_flags = 0; | |
587 | /* | |
588 | * sr_status is only set in decode_sequence, and so will remain | |
589 | * set to 1 if an rpc level failure occurs. | |
590 | */ | |
591 | res->sr_status = 1; | |
592 | out_success: | |
593 | rpc_call_start(task); | |
594 | return 0; | |
595 | out_sleep: | |
596 | /* Privileged tasks are queued with top priority */ | |
597 | if (args->sa_privileged) | |
598 | rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, | |
599 | NULL, RPC_PRIORITY_PRIVILEGED); | |
600 | else | |
601 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
602 | spin_unlock(&tbl->slot_tbl_lock); | |
603 | return -EAGAIN; | |
604 | } | |
605 | EXPORT_SYMBOL_GPL(nfs41_setup_sequence); | |
606 | ||
607 | int nfs4_setup_sequence(const struct nfs_server *server, | |
608 | struct nfs4_sequence_args *args, | |
609 | struct nfs4_sequence_res *res, | |
610 | struct rpc_task *task) | |
611 | { | |
612 | struct nfs4_session *session = nfs4_get_session(server); | |
613 | int ret = 0; | |
614 | ||
615 | if (session == NULL) { | |
616 | rpc_call_start(task); | |
617 | goto out; | |
618 | } | |
619 | ||
620 | dprintk("--> %s clp %p session %p sr_slot %d\n", | |
621 | __func__, session->clp, session, res->sr_slot ? | |
622 | res->sr_slot->slot_nr : -1); | |
623 | ||
624 | ret = nfs41_setup_sequence(session, args, res, task); | |
625 | out: | |
626 | dprintk("<-- %s status=%d\n", __func__, ret); | |
627 | return ret; | |
628 | } | |
629 | ||
630 | struct nfs41_call_sync_data { | |
631 | const struct nfs_server *seq_server; | |
632 | struct nfs4_sequence_args *seq_args; | |
633 | struct nfs4_sequence_res *seq_res; | |
634 | }; | |
635 | ||
636 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
637 | { | |
638 | struct nfs41_call_sync_data *data = calldata; | |
639 | struct nfs4_session *session = nfs4_get_session(data->seq_server); | |
640 | ||
641 | dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); | |
642 | ||
643 | nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); | |
644 | } | |
645 | ||
646 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) | |
647 | { | |
648 | struct nfs41_call_sync_data *data = calldata; | |
649 | ||
650 | nfs41_sequence_done(task, data->seq_res); | |
651 | } | |
652 | ||
653 | static const struct rpc_call_ops nfs41_call_sync_ops = { | |
654 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
655 | .rpc_call_done = nfs41_call_sync_done, | |
656 | }; | |
657 | ||
658 | static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, | |
659 | struct nfs_server *server, | |
660 | struct rpc_message *msg, | |
661 | struct nfs4_sequence_args *args, | |
662 | struct nfs4_sequence_res *res) | |
663 | { | |
664 | int ret; | |
665 | struct rpc_task *task; | |
666 | struct nfs41_call_sync_data data = { | |
667 | .seq_server = server, | |
668 | .seq_args = args, | |
669 | .seq_res = res, | |
670 | }; | |
671 | struct rpc_task_setup task_setup = { | |
672 | .rpc_client = clnt, | |
673 | .rpc_message = msg, | |
674 | .callback_ops = &nfs41_call_sync_ops, | |
675 | .callback_data = &data | |
676 | }; | |
677 | ||
678 | task = rpc_run_task(&task_setup); | |
679 | if (IS_ERR(task)) | |
680 | ret = PTR_ERR(task); | |
681 | else { | |
682 | ret = task->tk_status; | |
683 | rpc_put_task(task); | |
684 | } | |
685 | return ret; | |
686 | } | |
687 | ||
688 | #else | |
689 | static | |
690 | void nfs41_init_sequence(struct nfs4_sequence_args *args, | |
691 | struct nfs4_sequence_res *res, int cache_reply) | |
692 | { | |
693 | } | |
694 | ||
695 | static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) | |
696 | { | |
697 | } | |
698 | ||
699 | ||
700 | static int nfs4_sequence_done(struct rpc_task *task, | |
701 | struct nfs4_sequence_res *res) | |
702 | { | |
703 | return 1; | |
704 | } | |
705 | #endif /* CONFIG_NFS_V4_1 */ | |
706 | ||
707 | static | |
708 | int _nfs4_call_sync(struct rpc_clnt *clnt, | |
709 | struct nfs_server *server, | |
710 | struct rpc_message *msg, | |
711 | struct nfs4_sequence_args *args, | |
712 | struct nfs4_sequence_res *res) | |
713 | { | |
714 | return rpc_call_sync(clnt, msg, 0); | |
715 | } | |
716 | ||
717 | static | |
718 | int nfs4_call_sync(struct rpc_clnt *clnt, | |
719 | struct nfs_server *server, | |
720 | struct rpc_message *msg, | |
721 | struct nfs4_sequence_args *args, | |
722 | struct nfs4_sequence_res *res, | |
723 | int cache_reply) | |
724 | { | |
725 | nfs41_init_sequence(args, res, cache_reply); | |
726 | return server->nfs_client->cl_mvops->call_sync(clnt, server, msg, | |
727 | args, res); | |
728 | } | |
729 | ||
730 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) | |
731 | { | |
732 | struct nfs_inode *nfsi = NFS_I(dir); | |
733 | ||
734 | spin_lock(&dir->i_lock); | |
735 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
736 | if (!cinfo->atomic || cinfo->before != dir->i_version) | |
737 | nfs_force_lookup_revalidate(dir); | |
738 | dir->i_version = cinfo->after; | |
739 | nfs_fscache_invalidate(dir); | |
740 | spin_unlock(&dir->i_lock); | |
741 | } | |
742 | ||
743 | struct nfs4_opendata { | |
744 | struct kref kref; | |
745 | struct nfs_openargs o_arg; | |
746 | struct nfs_openres o_res; | |
747 | struct nfs_open_confirmargs c_arg; | |
748 | struct nfs_open_confirmres c_res; | |
749 | struct nfs4_string owner_name; | |
750 | struct nfs4_string group_name; | |
751 | struct nfs_fattr f_attr; | |
752 | struct dentry *dir; | |
753 | struct dentry *dentry; | |
754 | struct nfs4_state_owner *owner; | |
755 | struct nfs4_state *state; | |
756 | struct iattr attrs; | |
757 | unsigned long timestamp; | |
758 | unsigned int rpc_done : 1; | |
759 | int rpc_status; | |
760 | int cancelled; | |
761 | }; | |
762 | ||
763 | ||
764 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
765 | { | |
766 | p->o_res.f_attr = &p->f_attr; | |
767 | p->o_res.seqid = p->o_arg.seqid; | |
768 | p->c_res.seqid = p->c_arg.seqid; | |
769 | p->o_res.server = p->o_arg.server; | |
770 | p->o_res.access_request = p->o_arg.access; | |
771 | nfs_fattr_init(&p->f_attr); | |
772 | nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); | |
773 | } | |
774 | ||
775 | static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, | |
776 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, | |
777 | const struct iattr *attrs, | |
778 | gfp_t gfp_mask) | |
779 | { | |
780 | struct dentry *parent = dget_parent(dentry); | |
781 | struct inode *dir = parent->d_inode; | |
782 | struct nfs_server *server = NFS_SERVER(dir); | |
783 | struct nfs4_opendata *p; | |
784 | ||
785 | p = kzalloc(sizeof(*p), gfp_mask); | |
786 | if (p == NULL) | |
787 | goto err; | |
788 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); | |
789 | if (p->o_arg.seqid == NULL) | |
790 | goto err_free; | |
791 | nfs_sb_active(dentry->d_sb); | |
792 | p->dentry = dget(dentry); | |
793 | p->dir = parent; | |
794 | p->owner = sp; | |
795 | atomic_inc(&sp->so_count); | |
796 | p->o_arg.fh = NFS_FH(dir); | |
797 | p->o_arg.open_flags = flags; | |
798 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
799 | /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS | |
800 | * will return permission denied for all bits until close */ | |
801 | if (!(flags & O_EXCL)) { | |
802 | /* ask server to check for all possible rights as results | |
803 | * are cached */ | |
804 | p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | | |
805 | NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; | |
806 | } | |
807 | p->o_arg.clientid = server->nfs_client->cl_clientid; | |
808 | p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); | |
809 | p->o_arg.id.uniquifier = sp->so_seqid.owner_id; | |
810 | p->o_arg.name = &dentry->d_name; | |
811 | p->o_arg.server = server; | |
812 | p->o_arg.bitmask = server->attr_bitmask; | |
813 | p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; | |
814 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
815 | if (attrs != NULL && attrs->ia_valid != 0) { | |
816 | __be32 verf[2]; | |
817 | ||
818 | p->o_arg.u.attrs = &p->attrs; | |
819 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
820 | ||
821 | verf[0] = jiffies; | |
822 | verf[1] = current->pid; | |
823 | memcpy(p->o_arg.u.verifier.data, verf, | |
824 | sizeof(p->o_arg.u.verifier.data)); | |
825 | } | |
826 | p->c_arg.fh = &p->o_res.fh; | |
827 | p->c_arg.stateid = &p->o_res.stateid; | |
828 | p->c_arg.seqid = p->o_arg.seqid; | |
829 | nfs4_init_opendata_res(p); | |
830 | kref_init(&p->kref); | |
831 | return p; | |
832 | err_free: | |
833 | kfree(p); | |
834 | err: | |
835 | dput(parent); | |
836 | return NULL; | |
837 | } | |
838 | ||
839 | static void nfs4_opendata_free(struct kref *kref) | |
840 | { | |
841 | struct nfs4_opendata *p = container_of(kref, | |
842 | struct nfs4_opendata, kref); | |
843 | struct super_block *sb = p->dentry->d_sb; | |
844 | ||
845 | nfs_free_seqid(p->o_arg.seqid); | |
846 | if (p->state != NULL) | |
847 | nfs4_put_open_state(p->state); | |
848 | nfs4_put_state_owner(p->owner); | |
849 | dput(p->dir); | |
850 | dput(p->dentry); | |
851 | nfs_sb_deactive(sb); | |
852 | nfs_fattr_free_names(&p->f_attr); | |
853 | kfree(p); | |
854 | } | |
855 | ||
856 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
857 | { | |
858 | if (p != NULL) | |
859 | kref_put(&p->kref, nfs4_opendata_free); | |
860 | } | |
861 | ||
862 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) | |
863 | { | |
864 | int ret; | |
865 | ||
866 | ret = rpc_wait_for_completion_task(task); | |
867 | return ret; | |
868 | } | |
869 | ||
870 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) | |
871 | { | |
872 | int ret = 0; | |
873 | ||
874 | if (open_mode & (O_EXCL|O_TRUNC)) | |
875 | goto out; | |
876 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
877 | case FMODE_READ: | |
878 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 | |
879 | && state->n_rdonly != 0; | |
880 | break; | |
881 | case FMODE_WRITE: | |
882 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 | |
883 | && state->n_wronly != 0; | |
884 | break; | |
885 | case FMODE_READ|FMODE_WRITE: | |
886 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 | |
887 | && state->n_rdwr != 0; | |
888 | } | |
889 | out: | |
890 | return ret; | |
891 | } | |
892 | ||
893 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) | |
894 | { | |
895 | if (delegation == NULL) | |
896 | return 0; | |
897 | if ((delegation->type & fmode) != fmode) | |
898 | return 0; | |
899 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) | |
900 | return 0; | |
901 | if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) | |
902 | return 0; | |
903 | nfs_mark_delegation_referenced(delegation); | |
904 | return 1; | |
905 | } | |
906 | ||
907 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) | |
908 | { | |
909 | switch (fmode) { | |
910 | case FMODE_WRITE: | |
911 | state->n_wronly++; | |
912 | break; | |
913 | case FMODE_READ: | |
914 | state->n_rdonly++; | |
915 | break; | |
916 | case FMODE_READ|FMODE_WRITE: | |
917 | state->n_rdwr++; | |
918 | } | |
919 | nfs4_state_set_mode_locked(state, state->state | fmode); | |
920 | } | |
921 | ||
922 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
923 | { | |
924 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
925 | nfs4_stateid_copy(&state->stateid, stateid); | |
926 | nfs4_stateid_copy(&state->open_stateid, stateid); | |
927 | switch (fmode) { | |
928 | case FMODE_READ: | |
929 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
930 | break; | |
931 | case FMODE_WRITE: | |
932 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
933 | break; | |
934 | case FMODE_READ|FMODE_WRITE: | |
935 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
936 | } | |
937 | } | |
938 | ||
939 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
940 | { | |
941 | write_seqlock(&state->seqlock); | |
942 | nfs_set_open_stateid_locked(state, stateid, fmode); | |
943 | write_sequnlock(&state->seqlock); | |
944 | } | |
945 | ||
946 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) | |
947 | { | |
948 | /* | |
949 | * Protect the call to nfs4_state_set_mode_locked and | |
950 | * serialise the stateid update | |
951 | */ | |
952 | write_seqlock(&state->seqlock); | |
953 | if (deleg_stateid != NULL) { | |
954 | nfs4_stateid_copy(&state->stateid, deleg_stateid); | |
955 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
956 | } | |
957 | if (open_stateid != NULL) | |
958 | nfs_set_open_stateid_locked(state, open_stateid, fmode); | |
959 | write_sequnlock(&state->seqlock); | |
960 | spin_lock(&state->owner->so_lock); | |
961 | update_open_stateflags(state, fmode); | |
962 | spin_unlock(&state->owner->so_lock); | |
963 | } | |
964 | ||
965 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) | |
966 | { | |
967 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
968 | struct nfs_delegation *deleg_cur; | |
969 | int ret = 0; | |
970 | ||
971 | fmode &= (FMODE_READ|FMODE_WRITE); | |
972 | ||
973 | rcu_read_lock(); | |
974 | deleg_cur = rcu_dereference(nfsi->delegation); | |
975 | if (deleg_cur == NULL) | |
976 | goto no_delegation; | |
977 | ||
978 | spin_lock(&deleg_cur->lock); | |
979 | if (nfsi->delegation != deleg_cur || | |
980 | test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || | |
981 | (deleg_cur->type & fmode) != fmode) | |
982 | goto no_delegation_unlock; | |
983 | ||
984 | if (delegation == NULL) | |
985 | delegation = &deleg_cur->stateid; | |
986 | else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) | |
987 | goto no_delegation_unlock; | |
988 | ||
989 | nfs_mark_delegation_referenced(deleg_cur); | |
990 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); | |
991 | ret = 1; | |
992 | no_delegation_unlock: | |
993 | spin_unlock(&deleg_cur->lock); | |
994 | no_delegation: | |
995 | rcu_read_unlock(); | |
996 | ||
997 | if (!ret && open_stateid != NULL) { | |
998 | __update_open_stateid(state, open_stateid, NULL, fmode); | |
999 | ret = 1; | |
1000 | } | |
1001 | ||
1002 | return ret; | |
1003 | } | |
1004 | ||
1005 | ||
1006 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) | |
1007 | { | |
1008 | struct nfs_delegation *delegation; | |
1009 | ||
1010 | rcu_read_lock(); | |
1011 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1012 | if (delegation == NULL || (delegation->type & fmode) == fmode) { | |
1013 | rcu_read_unlock(); | |
1014 | return; | |
1015 | } | |
1016 | rcu_read_unlock(); | |
1017 | nfs4_inode_return_delegation(inode); | |
1018 | } | |
1019 | ||
1020 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) | |
1021 | { | |
1022 | struct nfs4_state *state = opendata->state; | |
1023 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1024 | struct nfs_delegation *delegation; | |
1025 | int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC); | |
1026 | fmode_t fmode = opendata->o_arg.fmode; | |
1027 | nfs4_stateid stateid; | |
1028 | int ret = -EAGAIN; | |
1029 | ||
1030 | for (;;) { | |
1031 | if (can_open_cached(state, fmode, open_mode)) { | |
1032 | spin_lock(&state->owner->so_lock); | |
1033 | if (can_open_cached(state, fmode, open_mode)) { | |
1034 | update_open_stateflags(state, fmode); | |
1035 | spin_unlock(&state->owner->so_lock); | |
1036 | goto out_return_state; | |
1037 | } | |
1038 | spin_unlock(&state->owner->so_lock); | |
1039 | } | |
1040 | rcu_read_lock(); | |
1041 | delegation = rcu_dereference(nfsi->delegation); | |
1042 | if (!can_open_delegated(delegation, fmode)) { | |
1043 | rcu_read_unlock(); | |
1044 | break; | |
1045 | } | |
1046 | /* Save the delegation */ | |
1047 | nfs4_stateid_copy(&stateid, &delegation->stateid); | |
1048 | rcu_read_unlock(); | |
1049 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); | |
1050 | if (ret != 0) | |
1051 | goto out; | |
1052 | ret = -EAGAIN; | |
1053 | ||
1054 | /* Try to update the stateid using the delegation */ | |
1055 | if (update_open_stateid(state, NULL, &stateid, fmode)) | |
1056 | goto out_return_state; | |
1057 | } | |
1058 | out: | |
1059 | return ERR_PTR(ret); | |
1060 | out_return_state: | |
1061 | atomic_inc(&state->count); | |
1062 | return state; | |
1063 | } | |
1064 | ||
1065 | static void | |
1066 | nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) | |
1067 | { | |
1068 | struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; | |
1069 | struct nfs_delegation *delegation; | |
1070 | int delegation_flags = 0; | |
1071 | ||
1072 | rcu_read_lock(); | |
1073 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
1074 | if (delegation) | |
1075 | delegation_flags = delegation->flags; | |
1076 | rcu_read_unlock(); | |
1077 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { | |
1078 | pr_err_ratelimited("NFS: Broken NFSv4 server %s is " | |
1079 | "returning a delegation for " | |
1080 | "OPEN(CLAIM_DELEGATE_CUR)\n", | |
1081 | clp->cl_hostname); | |
1082 | } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) | |
1083 | nfs_inode_set_delegation(state->inode, | |
1084 | data->owner->so_cred, | |
1085 | &data->o_res); | |
1086 | else | |
1087 | nfs_inode_reclaim_delegation(state->inode, | |
1088 | data->owner->so_cred, | |
1089 | &data->o_res); | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Check the inode attributes against the CLAIM_PREVIOUS returned attributes | |
1094 | * and update the nfs4_state. | |
1095 | */ | |
1096 | static struct nfs4_state * | |
1097 | _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) | |
1098 | { | |
1099 | struct inode *inode = data->state->inode; | |
1100 | struct nfs4_state *state = data->state; | |
1101 | int ret; | |
1102 | ||
1103 | if (!data->rpc_done) { | |
1104 | ret = data->rpc_status; | |
1105 | goto err; | |
1106 | } | |
1107 | ||
1108 | ret = -ESTALE; | |
1109 | if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) || | |
1110 | !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) || | |
1111 | !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE)) | |
1112 | goto err; | |
1113 | ||
1114 | ret = -ENOMEM; | |
1115 | state = nfs4_get_open_state(inode, data->owner); | |
1116 | if (state == NULL) | |
1117 | goto err; | |
1118 | ||
1119 | ret = nfs_refresh_inode(inode, &data->f_attr); | |
1120 | if (ret) | |
1121 | goto err; | |
1122 | ||
1123 | if (data->o_res.delegation_type != 0) | |
1124 | nfs4_opendata_check_deleg(data, state); | |
1125 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
1126 | data->o_arg.fmode); | |
1127 | ||
1128 | return state; | |
1129 | err: | |
1130 | return ERR_PTR(ret); | |
1131 | ||
1132 | } | |
1133 | ||
1134 | static struct nfs4_state * | |
1135 | _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) | |
1136 | { | |
1137 | struct inode *inode; | |
1138 | struct nfs4_state *state = NULL; | |
1139 | int ret; | |
1140 | ||
1141 | if (!data->rpc_done) { | |
1142 | state = nfs4_try_open_cached(data); | |
1143 | goto out; | |
1144 | } | |
1145 | ||
1146 | ret = -EAGAIN; | |
1147 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
1148 | goto err; | |
1149 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
1150 | ret = PTR_ERR(inode); | |
1151 | if (IS_ERR(inode)) | |
1152 | goto err; | |
1153 | ret = -ENOMEM; | |
1154 | state = nfs4_get_open_state(inode, data->owner); | |
1155 | if (state == NULL) | |
1156 | goto err_put_inode; | |
1157 | if (data->o_res.delegation_type != 0) | |
1158 | nfs4_opendata_check_deleg(data, state); | |
1159 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
1160 | data->o_arg.fmode); | |
1161 | iput(inode); | |
1162 | out: | |
1163 | nfs_release_seqid(data->o_arg.seqid); | |
1164 | return state; | |
1165 | err_put_inode: | |
1166 | iput(inode); | |
1167 | err: | |
1168 | return ERR_PTR(ret); | |
1169 | } | |
1170 | ||
1171 | static struct nfs4_state * | |
1172 | nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) | |
1173 | { | |
1174 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) | |
1175 | return _nfs4_opendata_reclaim_to_nfs4_state(data); | |
1176 | return _nfs4_opendata_to_nfs4_state(data); | |
1177 | } | |
1178 | ||
1179 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) | |
1180 | { | |
1181 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1182 | struct nfs_open_context *ctx; | |
1183 | ||
1184 | spin_lock(&state->inode->i_lock); | |
1185 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1186 | if (ctx->state != state) | |
1187 | continue; | |
1188 | get_nfs_open_context(ctx); | |
1189 | spin_unlock(&state->inode->i_lock); | |
1190 | return ctx; | |
1191 | } | |
1192 | spin_unlock(&state->inode->i_lock); | |
1193 | return ERR_PTR(-ENOENT); | |
1194 | } | |
1195 | ||
1196 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1197 | { | |
1198 | struct nfs4_opendata *opendata; | |
1199 | ||
1200 | opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS); | |
1201 | if (opendata == NULL) | |
1202 | return ERR_PTR(-ENOMEM); | |
1203 | opendata->state = state; | |
1204 | atomic_inc(&state->count); | |
1205 | return opendata; | |
1206 | } | |
1207 | ||
1208 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) | |
1209 | { | |
1210 | struct nfs4_state *newstate; | |
1211 | int ret; | |
1212 | ||
1213 | opendata->o_arg.open_flags = 0; | |
1214 | opendata->o_arg.fmode = fmode; | |
1215 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); | |
1216 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1217 | nfs4_init_opendata_res(opendata); | |
1218 | ret = _nfs4_recover_proc_open(opendata); | |
1219 | if (ret != 0) | |
1220 | return ret; | |
1221 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
1222 | if (IS_ERR(newstate)) | |
1223 | return PTR_ERR(newstate); | |
1224 | nfs4_close_state(newstate, fmode); | |
1225 | *res = newstate; | |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1230 | { | |
1231 | struct nfs4_state *newstate; | |
1232 | int ret; | |
1233 | ||
1234 | /* memory barrier prior to reading state->n_* */ | |
1235 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1236 | smp_rmb(); | |
1237 | if (state->n_rdwr != 0) { | |
1238 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1239 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); | |
1240 | if (ret != 0) | |
1241 | return ret; | |
1242 | if (newstate != state) | |
1243 | return -ESTALE; | |
1244 | } | |
1245 | if (state->n_wronly != 0) { | |
1246 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1247 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); | |
1248 | if (ret != 0) | |
1249 | return ret; | |
1250 | if (newstate != state) | |
1251 | return -ESTALE; | |
1252 | } | |
1253 | if (state->n_rdonly != 0) { | |
1254 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1255 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); | |
1256 | if (ret != 0) | |
1257 | return ret; | |
1258 | if (newstate != state) | |
1259 | return -ESTALE; | |
1260 | } | |
1261 | /* | |
1262 | * We may have performed cached opens for all three recoveries. | |
1263 | * Check if we need to update the current stateid. | |
1264 | */ | |
1265 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1266 | !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { | |
1267 | write_seqlock(&state->seqlock); | |
1268 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
1269 | nfs4_stateid_copy(&state->stateid, &state->open_stateid); | |
1270 | write_sequnlock(&state->seqlock); | |
1271 | } | |
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * OPEN_RECLAIM: | |
1277 | * reclaim state on the server after a reboot. | |
1278 | */ | |
1279 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1280 | { | |
1281 | struct nfs_delegation *delegation; | |
1282 | struct nfs4_opendata *opendata; | |
1283 | fmode_t delegation_type = 0; | |
1284 | int status; | |
1285 | ||
1286 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1287 | if (IS_ERR(opendata)) | |
1288 | return PTR_ERR(opendata); | |
1289 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; | |
1290 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1291 | rcu_read_lock(); | |
1292 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
1293 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) | |
1294 | delegation_type = delegation->type; | |
1295 | rcu_read_unlock(); | |
1296 | opendata->o_arg.u.delegation_type = delegation_type; | |
1297 | status = nfs4_open_recover(opendata, state); | |
1298 | nfs4_opendata_put(opendata); | |
1299 | return status; | |
1300 | } | |
1301 | ||
1302 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1303 | { | |
1304 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1305 | struct nfs4_exception exception = { }; | |
1306 | int err; | |
1307 | do { | |
1308 | err = _nfs4_do_open_reclaim(ctx, state); | |
1309 | if (err != -NFS4ERR_DELAY) | |
1310 | break; | |
1311 | nfs4_handle_exception(server, err, &exception); | |
1312 | } while (exception.retry); | |
1313 | return err; | |
1314 | } | |
1315 | ||
1316 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1317 | { | |
1318 | struct nfs_open_context *ctx; | |
1319 | int ret; | |
1320 | ||
1321 | ctx = nfs4_state_find_open_context(state); | |
1322 | if (IS_ERR(ctx)) | |
1323 | return PTR_ERR(ctx); | |
1324 | ret = nfs4_do_open_reclaim(ctx, state); | |
1325 | put_nfs_open_context(ctx); | |
1326 | return ret; | |
1327 | } | |
1328 | ||
1329 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1330 | { | |
1331 | struct nfs4_opendata *opendata; | |
1332 | int ret; | |
1333 | ||
1334 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1335 | if (IS_ERR(opendata)) | |
1336 | return PTR_ERR(opendata); | |
1337 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; | |
1338 | nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); | |
1339 | ret = nfs4_open_recover(opendata, state); | |
1340 | nfs4_opendata_put(opendata); | |
1341 | return ret; | |
1342 | } | |
1343 | ||
1344 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1345 | { | |
1346 | struct nfs4_exception exception = { }; | |
1347 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1348 | int err; | |
1349 | do { | |
1350 | err = _nfs4_open_delegation_recall(ctx, state, stateid); | |
1351 | switch (err) { | |
1352 | case 0: | |
1353 | case -ENOENT: | |
1354 | case -ESTALE: | |
1355 | goto out; | |
1356 | case -NFS4ERR_BADSESSION: | |
1357 | case -NFS4ERR_BADSLOT: | |
1358 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1359 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1360 | case -NFS4ERR_DEADSESSION: | |
1361 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
1362 | nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); | |
1363 | err = -EAGAIN; | |
1364 | goto out; | |
1365 | case -NFS4ERR_STALE_CLIENTID: | |
1366 | case -NFS4ERR_STALE_STATEID: | |
1367 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
1368 | case -NFS4ERR_EXPIRED: | |
1369 | /* Don't recall a delegation if it was lost */ | |
1370 | nfs4_schedule_lease_recovery(server->nfs_client); | |
1371 | err = -EAGAIN; | |
1372 | goto out; | |
1373 | case -NFS4ERR_DELEG_REVOKED: | |
1374 | case -NFS4ERR_ADMIN_REVOKED: | |
1375 | case -NFS4ERR_BAD_STATEID: | |
1376 | nfs_inode_find_state_and_recover(state->inode, | |
1377 | stateid); | |
1378 | nfs4_schedule_stateid_recovery(server, state); | |
1379 | case -ENOMEM: | |
1380 | err = 0; | |
1381 | goto out; | |
1382 | } | |
1383 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
1384 | err = nfs4_handle_exception(server, err, &exception); | |
1385 | } while (exception.retry); | |
1386 | out: | |
1387 | return err; | |
1388 | } | |
1389 | ||
1390 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
1391 | { | |
1392 | struct nfs4_opendata *data = calldata; | |
1393 | ||
1394 | data->rpc_status = task->tk_status; | |
1395 | if (data->rpc_status == 0) { | |
1396 | nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); | |
1397 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1398 | renew_lease(data->o_res.server, data->timestamp); | |
1399 | data->rpc_done = 1; | |
1400 | } | |
1401 | } | |
1402 | ||
1403 | static void nfs4_open_confirm_release(void *calldata) | |
1404 | { | |
1405 | struct nfs4_opendata *data = calldata; | |
1406 | struct nfs4_state *state = NULL; | |
1407 | ||
1408 | /* If this request hasn't been cancelled, do nothing */ | |
1409 | if (data->cancelled == 0) | |
1410 | goto out_free; | |
1411 | /* In case of error, no cleanup! */ | |
1412 | if (!data->rpc_done) | |
1413 | goto out_free; | |
1414 | state = nfs4_opendata_to_nfs4_state(data); | |
1415 | if (!IS_ERR(state)) | |
1416 | nfs4_close_state(state, data->o_arg.fmode); | |
1417 | out_free: | |
1418 | nfs4_opendata_put(data); | |
1419 | } | |
1420 | ||
1421 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
1422 | .rpc_call_done = nfs4_open_confirm_done, | |
1423 | .rpc_release = nfs4_open_confirm_release, | |
1424 | }; | |
1425 | ||
1426 | /* | |
1427 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1428 | */ | |
1429 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1430 | { | |
1431 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1432 | struct rpc_task *task; | |
1433 | struct rpc_message msg = { | |
1434 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1435 | .rpc_argp = &data->c_arg, | |
1436 | .rpc_resp = &data->c_res, | |
1437 | .rpc_cred = data->owner->so_cred, | |
1438 | }; | |
1439 | struct rpc_task_setup task_setup_data = { | |
1440 | .rpc_client = server->client, | |
1441 | .rpc_message = &msg, | |
1442 | .callback_ops = &nfs4_open_confirm_ops, | |
1443 | .callback_data = data, | |
1444 | .workqueue = nfsiod_workqueue, | |
1445 | .flags = RPC_TASK_ASYNC, | |
1446 | }; | |
1447 | int status; | |
1448 | ||
1449 | kref_get(&data->kref); | |
1450 | data->rpc_done = 0; | |
1451 | data->rpc_status = 0; | |
1452 | data->timestamp = jiffies; | |
1453 | task = rpc_run_task(&task_setup_data); | |
1454 | if (IS_ERR(task)) | |
1455 | return PTR_ERR(task); | |
1456 | status = nfs4_wait_for_completion_rpc_task(task); | |
1457 | if (status != 0) { | |
1458 | data->cancelled = 1; | |
1459 | smp_wmb(); | |
1460 | } else | |
1461 | status = data->rpc_status; | |
1462 | rpc_put_task(task); | |
1463 | return status; | |
1464 | } | |
1465 | ||
1466 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) | |
1467 | { | |
1468 | struct nfs4_opendata *data = calldata; | |
1469 | struct nfs4_state_owner *sp = data->owner; | |
1470 | ||
1471 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
1472 | goto out_wait; | |
1473 | /* | |
1474 | * Check if we still need to send an OPEN call, or if we can use | |
1475 | * a delegation instead. | |
1476 | */ | |
1477 | if (data->state != NULL) { | |
1478 | struct nfs_delegation *delegation; | |
1479 | ||
1480 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) | |
1481 | goto out_no_action; | |
1482 | rcu_read_lock(); | |
1483 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1484 | if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && | |
1485 | can_open_delegated(delegation, data->o_arg.fmode)) | |
1486 | goto unlock_no_action; | |
1487 | rcu_read_unlock(); | |
1488 | } | |
1489 | /* Update client id. */ | |
1490 | data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid; | |
1491 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { | |
1492 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
1493 | data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; | |
1494 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); | |
1495 | } | |
1496 | data->timestamp = jiffies; | |
1497 | if (nfs4_setup_sequence(data->o_arg.server, | |
1498 | &data->o_arg.seq_args, | |
1499 | &data->o_res.seq_res, | |
1500 | task) != 0) | |
1501 | nfs_release_seqid(data->o_arg.seqid); | |
1502 | return; | |
1503 | unlock_no_action: | |
1504 | rcu_read_unlock(); | |
1505 | out_no_action: | |
1506 | task->tk_action = NULL; | |
1507 | out_wait: | |
1508 | nfs4_sequence_done(task, &data->o_res.seq_res); | |
1509 | } | |
1510 | ||
1511 | static void nfs4_open_done(struct rpc_task *task, void *calldata) | |
1512 | { | |
1513 | struct nfs4_opendata *data = calldata; | |
1514 | ||
1515 | data->rpc_status = task->tk_status; | |
1516 | ||
1517 | if (!nfs4_sequence_done(task, &data->o_res.seq_res)) | |
1518 | return; | |
1519 | ||
1520 | if (task->tk_status == 0) { | |
1521 | if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { | |
1522 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
1523 | case S_IFREG: | |
1524 | break; | |
1525 | case S_IFLNK: | |
1526 | data->rpc_status = -ELOOP; | |
1527 | break; | |
1528 | case S_IFDIR: | |
1529 | data->rpc_status = -EISDIR; | |
1530 | break; | |
1531 | default: | |
1532 | data->rpc_status = -ENOTDIR; | |
1533 | } | |
1534 | } | |
1535 | renew_lease(data->o_res.server, data->timestamp); | |
1536 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) | |
1537 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1538 | } | |
1539 | data->rpc_done = 1; | |
1540 | } | |
1541 | ||
1542 | static void nfs4_open_release(void *calldata) | |
1543 | { | |
1544 | struct nfs4_opendata *data = calldata; | |
1545 | struct nfs4_state *state = NULL; | |
1546 | ||
1547 | /* If this request hasn't been cancelled, do nothing */ | |
1548 | if (data->cancelled == 0) | |
1549 | goto out_free; | |
1550 | /* In case of error, no cleanup! */ | |
1551 | if (data->rpc_status != 0 || !data->rpc_done) | |
1552 | goto out_free; | |
1553 | /* In case we need an open_confirm, no cleanup! */ | |
1554 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1555 | goto out_free; | |
1556 | state = nfs4_opendata_to_nfs4_state(data); | |
1557 | if (!IS_ERR(state)) | |
1558 | nfs4_close_state(state, data->o_arg.fmode); | |
1559 | out_free: | |
1560 | nfs4_opendata_put(data); | |
1561 | } | |
1562 | ||
1563 | static const struct rpc_call_ops nfs4_open_ops = { | |
1564 | .rpc_call_prepare = nfs4_open_prepare, | |
1565 | .rpc_call_done = nfs4_open_done, | |
1566 | .rpc_release = nfs4_open_release, | |
1567 | }; | |
1568 | ||
1569 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
1570 | { | |
1571 | struct inode *dir = data->dir->d_inode; | |
1572 | struct nfs_server *server = NFS_SERVER(dir); | |
1573 | struct nfs_openargs *o_arg = &data->o_arg; | |
1574 | struct nfs_openres *o_res = &data->o_res; | |
1575 | struct rpc_task *task; | |
1576 | struct rpc_message msg = { | |
1577 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1578 | .rpc_argp = o_arg, | |
1579 | .rpc_resp = o_res, | |
1580 | .rpc_cred = data->owner->so_cred, | |
1581 | }; | |
1582 | struct rpc_task_setup task_setup_data = { | |
1583 | .rpc_client = server->client, | |
1584 | .rpc_message = &msg, | |
1585 | .callback_ops = &nfs4_open_ops, | |
1586 | .callback_data = data, | |
1587 | .workqueue = nfsiod_workqueue, | |
1588 | .flags = RPC_TASK_ASYNC, | |
1589 | }; | |
1590 | int status; | |
1591 | ||
1592 | nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); | |
1593 | kref_get(&data->kref); | |
1594 | data->rpc_done = 0; | |
1595 | data->rpc_status = 0; | |
1596 | data->cancelled = 0; | |
1597 | if (isrecover) | |
1598 | nfs4_set_sequence_privileged(&o_arg->seq_args); | |
1599 | task = rpc_run_task(&task_setup_data); | |
1600 | if (IS_ERR(task)) | |
1601 | return PTR_ERR(task); | |
1602 | status = nfs4_wait_for_completion_rpc_task(task); | |
1603 | if (status != 0) { | |
1604 | data->cancelled = 1; | |
1605 | smp_wmb(); | |
1606 | } else | |
1607 | status = data->rpc_status; | |
1608 | rpc_put_task(task); | |
1609 | ||
1610 | return status; | |
1611 | } | |
1612 | ||
1613 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1614 | { | |
1615 | struct inode *dir = data->dir->d_inode; | |
1616 | struct nfs_openres *o_res = &data->o_res; | |
1617 | int status; | |
1618 | ||
1619 | status = nfs4_run_open_task(data, 1); | |
1620 | if (status != 0 || !data->rpc_done) | |
1621 | return status; | |
1622 | ||
1623 | nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); | |
1624 | ||
1625 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1626 | status = _nfs4_proc_open_confirm(data); | |
1627 | if (status != 0) | |
1628 | return status; | |
1629 | } | |
1630 | ||
1631 | return status; | |
1632 | } | |
1633 | ||
1634 | static int nfs4_opendata_access(struct rpc_cred *cred, | |
1635 | struct nfs4_opendata *opendata, | |
1636 | struct nfs4_state *state, fmode_t fmode, | |
1637 | int openflags) | |
1638 | { | |
1639 | struct nfs_access_entry cache; | |
1640 | u32 mask; | |
1641 | ||
1642 | /* access call failed or for some reason the server doesn't | |
1643 | * support any access modes -- defer access call until later */ | |
1644 | if (opendata->o_res.access_supported == 0) | |
1645 | return 0; | |
1646 | ||
1647 | mask = 0; | |
1648 | /* don't check MAY_WRITE - a newly created file may not have | |
1649 | * write mode bits, but POSIX allows the creating process to write. | |
1650 | * use openflags to check for exec, because fmode won't | |
1651 | * always have FMODE_EXEC set when file open for exec. */ | |
1652 | if (openflags & __FMODE_EXEC) { | |
1653 | /* ONLY check for exec rights */ | |
1654 | mask = MAY_EXEC; | |
1655 | } else if (fmode & FMODE_READ) | |
1656 | mask = MAY_READ; | |
1657 | ||
1658 | cache.cred = cred; | |
1659 | cache.jiffies = jiffies; | |
1660 | nfs_access_set_mask(&cache, opendata->o_res.access_result); | |
1661 | nfs_access_add_cache(state->inode, &cache); | |
1662 | ||
1663 | if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) | |
1664 | return 0; | |
1665 | ||
1666 | /* even though OPEN succeeded, access is denied. Close the file */ | |
1667 | nfs4_close_state(state, fmode); | |
1668 | return -EACCES; | |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1673 | */ | |
1674 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1675 | { | |
1676 | struct inode *dir = data->dir->d_inode; | |
1677 | struct nfs_server *server = NFS_SERVER(dir); | |
1678 | struct nfs_openargs *o_arg = &data->o_arg; | |
1679 | struct nfs_openres *o_res = &data->o_res; | |
1680 | int status; | |
1681 | ||
1682 | status = nfs4_run_open_task(data, 0); | |
1683 | if (!data->rpc_done) | |
1684 | return status; | |
1685 | if (status != 0) { | |
1686 | if (status == -NFS4ERR_BADNAME && | |
1687 | !(o_arg->open_flags & O_CREAT)) | |
1688 | return -ENOENT; | |
1689 | return status; | |
1690 | } | |
1691 | ||
1692 | nfs_fattr_map_and_free_names(server, &data->f_attr); | |
1693 | ||
1694 | if (o_arg->open_flags & O_CREAT) | |
1695 | update_changeattr(dir, &o_res->cinfo); | |
1696 | if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) | |
1697 | server->caps &= ~NFS_CAP_POSIX_LOCK; | |
1698 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1699 | status = _nfs4_proc_open_confirm(data); | |
1700 | if (status != 0) | |
1701 | return status; | |
1702 | } | |
1703 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
1704 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); | |
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | static int nfs4_recover_expired_lease(struct nfs_server *server) | |
1709 | { | |
1710 | return nfs4_client_recover_expired_lease(server->nfs_client); | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * OPEN_EXPIRED: | |
1715 | * reclaim state on the server after a network partition. | |
1716 | * Assumes caller holds the appropriate lock | |
1717 | */ | |
1718 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1719 | { | |
1720 | struct nfs4_opendata *opendata; | |
1721 | int ret; | |
1722 | ||
1723 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1724 | if (IS_ERR(opendata)) | |
1725 | return PTR_ERR(opendata); | |
1726 | ret = nfs4_open_recover(opendata, state); | |
1727 | if (ret == -ESTALE) | |
1728 | d_drop(ctx->dentry); | |
1729 | nfs4_opendata_put(opendata); | |
1730 | return ret; | |
1731 | } | |
1732 | ||
1733 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1734 | { | |
1735 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1736 | struct nfs4_exception exception = { }; | |
1737 | int err; | |
1738 | ||
1739 | do { | |
1740 | err = _nfs4_open_expired(ctx, state); | |
1741 | switch (err) { | |
1742 | default: | |
1743 | goto out; | |
1744 | case -NFS4ERR_GRACE: | |
1745 | case -NFS4ERR_DELAY: | |
1746 | nfs4_handle_exception(server, err, &exception); | |
1747 | err = 0; | |
1748 | } | |
1749 | } while (exception.retry); | |
1750 | out: | |
1751 | return err; | |
1752 | } | |
1753 | ||
1754 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1755 | { | |
1756 | struct nfs_open_context *ctx; | |
1757 | int ret; | |
1758 | ||
1759 | ctx = nfs4_state_find_open_context(state); | |
1760 | if (IS_ERR(ctx)) | |
1761 | return PTR_ERR(ctx); | |
1762 | ret = nfs4_do_open_expired(ctx, state); | |
1763 | put_nfs_open_context(ctx); | |
1764 | return ret; | |
1765 | } | |
1766 | ||
1767 | #if defined(CONFIG_NFS_V4_1) | |
1768 | static void nfs41_clear_delegation_stateid(struct nfs4_state *state) | |
1769 | { | |
1770 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1771 | nfs4_stateid *stateid = &state->stateid; | |
1772 | int status; | |
1773 | ||
1774 | /* If a state reset has been done, test_stateid is unneeded */ | |
1775 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
1776 | return; | |
1777 | ||
1778 | status = nfs41_test_stateid(server, stateid); | |
1779 | if (status != NFS_OK) { | |
1780 | /* Free the stateid unless the server explicitly | |
1781 | * informs us the stateid is unrecognized. */ | |
1782 | if (status != -NFS4ERR_BAD_STATEID) | |
1783 | nfs41_free_stateid(server, stateid); | |
1784 | nfs_remove_bad_delegation(state->inode); | |
1785 | ||
1786 | write_seqlock(&state->seqlock); | |
1787 | nfs4_stateid_copy(&state->stateid, &state->open_stateid); | |
1788 | write_sequnlock(&state->seqlock); | |
1789 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | /** | |
1794 | * nfs41_check_open_stateid - possibly free an open stateid | |
1795 | * | |
1796 | * @state: NFSv4 state for an inode | |
1797 | * | |
1798 | * Returns NFS_OK if recovery for this stateid is now finished. | |
1799 | * Otherwise a negative NFS4ERR value is returned. | |
1800 | */ | |
1801 | static int nfs41_check_open_stateid(struct nfs4_state *state) | |
1802 | { | |
1803 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1804 | nfs4_stateid *stateid = &state->open_stateid; | |
1805 | int status; | |
1806 | ||
1807 | /* If a state reset has been done, test_stateid is unneeded */ | |
1808 | if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && | |
1809 | (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && | |
1810 | (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) | |
1811 | return -NFS4ERR_BAD_STATEID; | |
1812 | ||
1813 | status = nfs41_test_stateid(server, stateid); | |
1814 | if (status != NFS_OK) { | |
1815 | /* Free the stateid unless the server explicitly | |
1816 | * informs us the stateid is unrecognized. */ | |
1817 | if (status != -NFS4ERR_BAD_STATEID) | |
1818 | nfs41_free_stateid(server, stateid); | |
1819 | ||
1820 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1821 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1822 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1823 | } | |
1824 | return status; | |
1825 | } | |
1826 | ||
1827 | static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1828 | { | |
1829 | int status; | |
1830 | ||
1831 | nfs41_clear_delegation_stateid(state); | |
1832 | status = nfs41_check_open_stateid(state); | |
1833 | if (status != NFS_OK) | |
1834 | status = nfs4_open_expired(sp, state); | |
1835 | return status; | |
1836 | } | |
1837 | #endif | |
1838 | ||
1839 | /* | |
1840 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1841 | * fields corresponding to attributes that were used to store the verifier. | |
1842 | * Make sure we clobber those fields in the later setattr call | |
1843 | */ | |
1844 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1845 | { | |
1846 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1847 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1848 | sattr->ia_valid |= ATTR_ATIME; | |
1849 | ||
1850 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1851 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1852 | sattr->ia_valid |= ATTR_MTIME; | |
1853 | } | |
1854 | ||
1855 | static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, | |
1856 | fmode_t fmode, | |
1857 | int flags, | |
1858 | struct nfs4_state **res) | |
1859 | { | |
1860 | struct nfs4_state_owner *sp = opendata->owner; | |
1861 | struct nfs_server *server = sp->so_server; | |
1862 | struct nfs4_state *state; | |
1863 | unsigned int seq; | |
1864 | int ret; | |
1865 | ||
1866 | seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); | |
1867 | ||
1868 | ret = _nfs4_proc_open(opendata); | |
1869 | if (ret != 0) | |
1870 | goto out; | |
1871 | ||
1872 | state = nfs4_opendata_to_nfs4_state(opendata); | |
1873 | ret = PTR_ERR(state); | |
1874 | if (IS_ERR(state)) | |
1875 | goto out; | |
1876 | if (server->caps & NFS_CAP_POSIX_LOCK) | |
1877 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); | |
1878 | ||
1879 | ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); | |
1880 | if (ret != 0) | |
1881 | goto out; | |
1882 | ||
1883 | if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) { | |
1884 | nfs4_schedule_stateid_recovery(server, state); | |
1885 | nfs4_wait_clnt_recover(server->nfs_client); | |
1886 | } | |
1887 | *res = state; | |
1888 | out: | |
1889 | return ret; | |
1890 | } | |
1891 | ||
1892 | /* | |
1893 | * Returns a referenced nfs4_state | |
1894 | */ | |
1895 | static int _nfs4_do_open(struct inode *dir, | |
1896 | struct dentry *dentry, | |
1897 | fmode_t fmode, | |
1898 | int flags, | |
1899 | struct iattr *sattr, | |
1900 | struct rpc_cred *cred, | |
1901 | struct nfs4_state **res, | |
1902 | struct nfs4_threshold **ctx_th) | |
1903 | { | |
1904 | struct nfs4_state_owner *sp; | |
1905 | struct nfs4_state *state = NULL; | |
1906 | struct nfs_server *server = NFS_SERVER(dir); | |
1907 | struct nfs4_opendata *opendata; | |
1908 | int status; | |
1909 | ||
1910 | /* Protect against reboot recovery conflicts */ | |
1911 | status = -ENOMEM; | |
1912 | sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); | |
1913 | if (sp == NULL) { | |
1914 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1915 | goto out_err; | |
1916 | } | |
1917 | status = nfs4_recover_expired_lease(server); | |
1918 | if (status != 0) | |
1919 | goto err_put_state_owner; | |
1920 | if (dentry->d_inode != NULL) | |
1921 | nfs4_return_incompatible_delegation(dentry->d_inode, fmode); | |
1922 | status = -ENOMEM; | |
1923 | opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL); | |
1924 | if (opendata == NULL) | |
1925 | goto err_put_state_owner; | |
1926 | ||
1927 | if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { | |
1928 | opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); | |
1929 | if (!opendata->f_attr.mdsthreshold) | |
1930 | goto err_opendata_put; | |
1931 | opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; | |
1932 | } | |
1933 | if (dentry->d_inode != NULL) | |
1934 | opendata->state = nfs4_get_open_state(dentry->d_inode, sp); | |
1935 | ||
1936 | status = _nfs4_open_and_get_state(opendata, fmode, flags, &state); | |
1937 | if (status != 0) | |
1938 | goto err_opendata_put; | |
1939 | ||
1940 | if (opendata->o_arg.open_flags & O_EXCL) { | |
1941 | nfs4_exclusive_attrset(opendata, sattr); | |
1942 | ||
1943 | nfs_fattr_init(opendata->o_res.f_attr); | |
1944 | status = nfs4_do_setattr(state->inode, cred, | |
1945 | opendata->o_res.f_attr, sattr, | |
1946 | state); | |
1947 | if (status == 0) | |
1948 | nfs_setattr_update_inode(state->inode, sattr); | |
1949 | nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); | |
1950 | } | |
1951 | ||
1952 | if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) | |
1953 | *ctx_th = opendata->f_attr.mdsthreshold; | |
1954 | else | |
1955 | kfree(opendata->f_attr.mdsthreshold); | |
1956 | opendata->f_attr.mdsthreshold = NULL; | |
1957 | ||
1958 | nfs4_opendata_put(opendata); | |
1959 | nfs4_put_state_owner(sp); | |
1960 | *res = state; | |
1961 | return 0; | |
1962 | err_opendata_put: | |
1963 | kfree(opendata->f_attr.mdsthreshold); | |
1964 | nfs4_opendata_put(opendata); | |
1965 | err_put_state_owner: | |
1966 | nfs4_put_state_owner(sp); | |
1967 | out_err: | |
1968 | *res = NULL; | |
1969 | return status; | |
1970 | } | |
1971 | ||
1972 | ||
1973 | static struct nfs4_state *nfs4_do_open(struct inode *dir, | |
1974 | struct dentry *dentry, | |
1975 | fmode_t fmode, | |
1976 | int flags, | |
1977 | struct iattr *sattr, | |
1978 | struct rpc_cred *cred, | |
1979 | struct nfs4_threshold **ctx_th) | |
1980 | { | |
1981 | struct nfs4_exception exception = { }; | |
1982 | struct nfs4_state *res; | |
1983 | int status; | |
1984 | ||
1985 | fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC; | |
1986 | do { | |
1987 | status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, | |
1988 | &res, ctx_th); | |
1989 | if (status == 0) | |
1990 | break; | |
1991 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1992 | * book-keeping w.r.t. state-changing operations | |
1993 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1994 | * It is actually a sign of a bug on the client or on the server. | |
1995 | * | |
1996 | * If we receive a BAD_SEQID error in the particular case of | |
1997 | * doing an OPEN, we assume that nfs_increment_open_seqid() will | |
1998 | * have unhashed the old state_owner for us, and that we can | |
1999 | * therefore safely retry using a new one. We should still warn | |
2000 | * the user though... | |
2001 | */ | |
2002 | if (status == -NFS4ERR_BAD_SEQID) { | |
2003 | pr_warn_ratelimited("NFS: v4 server %s " | |
2004 | " returned a bad sequence-id error!\n", | |
2005 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
2006 | exception.retry = 1; | |
2007 | continue; | |
2008 | } | |
2009 | /* | |
2010 | * BAD_STATEID on OPEN means that the server cancelled our | |
2011 | * state before it received the OPEN_CONFIRM. | |
2012 | * Recover by retrying the request as per the discussion | |
2013 | * on Page 181 of RFC3530. | |
2014 | */ | |
2015 | if (status == -NFS4ERR_BAD_STATEID) { | |
2016 | exception.retry = 1; | |
2017 | continue; | |
2018 | } | |
2019 | if (status == -EAGAIN) { | |
2020 | /* We must have found a delegation */ | |
2021 | exception.retry = 1; | |
2022 | continue; | |
2023 | } | |
2024 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), | |
2025 | status, &exception)); | |
2026 | } while (exception.retry); | |
2027 | return res; | |
2028 | } | |
2029 | ||
2030 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
2031 | struct nfs_fattr *fattr, struct iattr *sattr, | |
2032 | struct nfs4_state *state) | |
2033 | { | |
2034 | struct nfs_server *server = NFS_SERVER(inode); | |
2035 | struct nfs_setattrargs arg = { | |
2036 | .fh = NFS_FH(inode), | |
2037 | .iap = sattr, | |
2038 | .server = server, | |
2039 | .bitmask = server->attr_bitmask, | |
2040 | }; | |
2041 | struct nfs_setattrres res = { | |
2042 | .fattr = fattr, | |
2043 | .server = server, | |
2044 | }; | |
2045 | struct rpc_message msg = { | |
2046 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
2047 | .rpc_argp = &arg, | |
2048 | .rpc_resp = &res, | |
2049 | .rpc_cred = cred, | |
2050 | }; | |
2051 | unsigned long timestamp = jiffies; | |
2052 | int status; | |
2053 | ||
2054 | nfs_fattr_init(fattr); | |
2055 | ||
2056 | if (state != NULL) { | |
2057 | struct nfs_lockowner lockowner = { | |
2058 | .l_owner = current->files, | |
2059 | .l_pid = current->tgid, | |
2060 | }; | |
2061 | nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, | |
2062 | &lockowner); | |
2063 | } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode, | |
2064 | FMODE_WRITE)) { | |
2065 | /* Use that stateid */ | |
2066 | } else | |
2067 | nfs4_stateid_copy(&arg.stateid, &zero_stateid); | |
2068 | ||
2069 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
2070 | if (status == 0 && state != NULL) | |
2071 | renew_lease(server, timestamp); | |
2072 | return status; | |
2073 | } | |
2074 | ||
2075 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
2076 | struct nfs_fattr *fattr, struct iattr *sattr, | |
2077 | struct nfs4_state *state) | |
2078 | { | |
2079 | struct nfs_server *server = NFS_SERVER(inode); | |
2080 | struct nfs4_exception exception = { | |
2081 | .state = state, | |
2082 | .inode = inode, | |
2083 | }; | |
2084 | int err; | |
2085 | do { | |
2086 | err = _nfs4_do_setattr(inode, cred, fattr, sattr, state); | |
2087 | switch (err) { | |
2088 | case -NFS4ERR_OPENMODE: | |
2089 | if (state && !(state->state & FMODE_WRITE)) { | |
2090 | err = -EBADF; | |
2091 | if (sattr->ia_valid & ATTR_OPEN) | |
2092 | err = -EACCES; | |
2093 | goto out; | |
2094 | } | |
2095 | } | |
2096 | err = nfs4_handle_exception(server, err, &exception); | |
2097 | } while (exception.retry); | |
2098 | out: | |
2099 | return err; | |
2100 | } | |
2101 | ||
2102 | struct nfs4_closedata { | |
2103 | struct inode *inode; | |
2104 | struct nfs4_state *state; | |
2105 | struct nfs_closeargs arg; | |
2106 | struct nfs_closeres res; | |
2107 | struct nfs_fattr fattr; | |
2108 | unsigned long timestamp; | |
2109 | bool roc; | |
2110 | u32 roc_barrier; | |
2111 | }; | |
2112 | ||
2113 | static void nfs4_free_closedata(void *data) | |
2114 | { | |
2115 | struct nfs4_closedata *calldata = data; | |
2116 | struct nfs4_state_owner *sp = calldata->state->owner; | |
2117 | struct super_block *sb = calldata->state->inode->i_sb; | |
2118 | ||
2119 | if (calldata->roc) | |
2120 | pnfs_roc_release(calldata->state->inode); | |
2121 | nfs4_put_open_state(calldata->state); | |
2122 | nfs_free_seqid(calldata->arg.seqid); | |
2123 | nfs4_put_state_owner(sp); | |
2124 | nfs_sb_deactive(sb); | |
2125 | kfree(calldata); | |
2126 | } | |
2127 | ||
2128 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, | |
2129 | fmode_t fmode) | |
2130 | { | |
2131 | spin_lock(&state->owner->so_lock); | |
2132 | if (!(fmode & FMODE_READ)) | |
2133 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
2134 | if (!(fmode & FMODE_WRITE)) | |
2135 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
2136 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
2137 | spin_unlock(&state->owner->so_lock); | |
2138 | } | |
2139 | ||
2140 | static void nfs4_close_done(struct rpc_task *task, void *data) | |
2141 | { | |
2142 | struct nfs4_closedata *calldata = data; | |
2143 | struct nfs4_state *state = calldata->state; | |
2144 | struct nfs_server *server = NFS_SERVER(calldata->inode); | |
2145 | ||
2146 | dprintk("%s: begin!\n", __func__); | |
2147 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) | |
2148 | return; | |
2149 | /* hmm. we are done with the inode, and in the process of freeing | |
2150 | * the state_owner. we keep this around to process errors | |
2151 | */ | |
2152 | switch (task->tk_status) { | |
2153 | case 0: | |
2154 | if (calldata->roc) | |
2155 | pnfs_roc_set_barrier(state->inode, | |
2156 | calldata->roc_barrier); | |
2157 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); | |
2158 | renew_lease(server, calldata->timestamp); | |
2159 | nfs4_close_clear_stateid_flags(state, | |
2160 | calldata->arg.fmode); | |
2161 | break; | |
2162 | case -NFS4ERR_STALE_STATEID: | |
2163 | case -NFS4ERR_OLD_STATEID: | |
2164 | case -NFS4ERR_BAD_STATEID: | |
2165 | case -NFS4ERR_EXPIRED: | |
2166 | if (calldata->arg.fmode == 0) | |
2167 | break; | |
2168 | default: | |
2169 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) | |
2170 | rpc_restart_call_prepare(task); | |
2171 | } | |
2172 | nfs_release_seqid(calldata->arg.seqid); | |
2173 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); | |
2174 | dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); | |
2175 | } | |
2176 | ||
2177 | static void nfs4_close_prepare(struct rpc_task *task, void *data) | |
2178 | { | |
2179 | struct nfs4_closedata *calldata = data; | |
2180 | struct nfs4_state *state = calldata->state; | |
2181 | struct inode *inode = calldata->inode; | |
2182 | int call_close = 0; | |
2183 | ||
2184 | dprintk("%s: begin!\n", __func__); | |
2185 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
2186 | goto out_wait; | |
2187 | ||
2188 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; | |
2189 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
2190 | spin_lock(&state->owner->so_lock); | |
2191 | /* Calculate the change in open mode */ | |
2192 | if (state->n_rdwr == 0) { | |
2193 | if (state->n_rdonly == 0) { | |
2194 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); | |
2195 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
2196 | calldata->arg.fmode &= ~FMODE_READ; | |
2197 | } | |
2198 | if (state->n_wronly == 0) { | |
2199 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); | |
2200 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
2201 | calldata->arg.fmode &= ~FMODE_WRITE; | |
2202 | } | |
2203 | } | |
2204 | spin_unlock(&state->owner->so_lock); | |
2205 | ||
2206 | if (!call_close) { | |
2207 | /* Note: exit _without_ calling nfs4_close_done */ | |
2208 | goto out_no_action; | |
2209 | } | |
2210 | ||
2211 | if (calldata->arg.fmode == 0) { | |
2212 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
2213 | if (calldata->roc && | |
2214 | pnfs_roc_drain(inode, &calldata->roc_barrier, task)) | |
2215 | goto out_wait; | |
2216 | } | |
2217 | ||
2218 | nfs_fattr_init(calldata->res.fattr); | |
2219 | calldata->timestamp = jiffies; | |
2220 | if (nfs4_setup_sequence(NFS_SERVER(inode), | |
2221 | &calldata->arg.seq_args, | |
2222 | &calldata->res.seq_res, | |
2223 | task) != 0) | |
2224 | nfs_release_seqid(calldata->arg.seqid); | |
2225 | dprintk("%s: done!\n", __func__); | |
2226 | return; | |
2227 | out_no_action: | |
2228 | task->tk_action = NULL; | |
2229 | out_wait: | |
2230 | nfs4_sequence_done(task, &calldata->res.seq_res); | |
2231 | } | |
2232 | ||
2233 | static const struct rpc_call_ops nfs4_close_ops = { | |
2234 | .rpc_call_prepare = nfs4_close_prepare, | |
2235 | .rpc_call_done = nfs4_close_done, | |
2236 | .rpc_release = nfs4_free_closedata, | |
2237 | }; | |
2238 | ||
2239 | /* | |
2240 | * It is possible for data to be read/written from a mem-mapped file | |
2241 | * after the sys_close call (which hits the vfs layer as a flush). | |
2242 | * This means that we can't safely call nfsv4 close on a file until | |
2243 | * the inode is cleared. This in turn means that we are not good | |
2244 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
2245 | * share state even when we are done with one of the three share | |
2246 | * stateid's in the inode. | |
2247 | * | |
2248 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
2249 | */ | |
2250 | int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) | |
2251 | { | |
2252 | struct nfs_server *server = NFS_SERVER(state->inode); | |
2253 | struct nfs4_closedata *calldata; | |
2254 | struct nfs4_state_owner *sp = state->owner; | |
2255 | struct rpc_task *task; | |
2256 | struct rpc_message msg = { | |
2257 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
2258 | .rpc_cred = state->owner->so_cred, | |
2259 | }; | |
2260 | struct rpc_task_setup task_setup_data = { | |
2261 | .rpc_client = server->client, | |
2262 | .rpc_message = &msg, | |
2263 | .callback_ops = &nfs4_close_ops, | |
2264 | .workqueue = nfsiod_workqueue, | |
2265 | .flags = RPC_TASK_ASYNC, | |
2266 | }; | |
2267 | int status = -ENOMEM; | |
2268 | ||
2269 | calldata = kzalloc(sizeof(*calldata), gfp_mask); | |
2270 | if (calldata == NULL) | |
2271 | goto out; | |
2272 | nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); | |
2273 | calldata->inode = state->inode; | |
2274 | calldata->state = state; | |
2275 | calldata->arg.fh = NFS_FH(state->inode); | |
2276 | calldata->arg.stateid = &state->open_stateid; | |
2277 | /* Serialization for the sequence id */ | |
2278 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); | |
2279 | if (calldata->arg.seqid == NULL) | |
2280 | goto out_free_calldata; | |
2281 | calldata->arg.fmode = 0; | |
2282 | calldata->arg.bitmask = server->cache_consistency_bitmask; | |
2283 | calldata->res.fattr = &calldata->fattr; | |
2284 | calldata->res.seqid = calldata->arg.seqid; | |
2285 | calldata->res.server = server; | |
2286 | calldata->roc = pnfs_roc(state->inode); | |
2287 | nfs_sb_active(calldata->inode->i_sb); | |
2288 | ||
2289 | msg.rpc_argp = &calldata->arg; | |
2290 | msg.rpc_resp = &calldata->res; | |
2291 | task_setup_data.callback_data = calldata; | |
2292 | task = rpc_run_task(&task_setup_data); | |
2293 | if (IS_ERR(task)) | |
2294 | return PTR_ERR(task); | |
2295 | status = 0; | |
2296 | if (wait) | |
2297 | status = rpc_wait_for_completion_task(task); | |
2298 | rpc_put_task(task); | |
2299 | return status; | |
2300 | out_free_calldata: | |
2301 | kfree(calldata); | |
2302 | out: | |
2303 | nfs4_put_open_state(state); | |
2304 | nfs4_put_state_owner(sp); | |
2305 | return status; | |
2306 | } | |
2307 | ||
2308 | static struct inode * | |
2309 | nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) | |
2310 | { | |
2311 | struct nfs4_state *state; | |
2312 | ||
2313 | /* Protect against concurrent sillydeletes */ | |
2314 | state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, | |
2315 | ctx->cred, &ctx->mdsthreshold); | |
2316 | if (IS_ERR(state)) | |
2317 | return ERR_CAST(state); | |
2318 | ctx->state = state; | |
2319 | return igrab(state->inode); | |
2320 | } | |
2321 | ||
2322 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) | |
2323 | { | |
2324 | if (ctx->state == NULL) | |
2325 | return; | |
2326 | if (is_sync) | |
2327 | nfs4_close_sync(ctx->state, ctx->mode); | |
2328 | else | |
2329 | nfs4_close_state(ctx->state, ctx->mode); | |
2330 | } | |
2331 | ||
2332 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2333 | { | |
2334 | struct nfs4_server_caps_arg args = { | |
2335 | .fhandle = fhandle, | |
2336 | }; | |
2337 | struct nfs4_server_caps_res res = {}; | |
2338 | struct rpc_message msg = { | |
2339 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
2340 | .rpc_argp = &args, | |
2341 | .rpc_resp = &res, | |
2342 | }; | |
2343 | int status; | |
2344 | ||
2345 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2346 | if (status == 0) { | |
2347 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
2348 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| | |
2349 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2350 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2351 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2352 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
2353 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
2354 | server->caps |= NFS_CAP_ACLS; | |
2355 | if (res.has_links != 0) | |
2356 | server->caps |= NFS_CAP_HARDLINKS; | |
2357 | if (res.has_symlinks != 0) | |
2358 | server->caps |= NFS_CAP_SYMLINKS; | |
2359 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) | |
2360 | server->caps |= NFS_CAP_FILEID; | |
2361 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2362 | server->caps |= NFS_CAP_MODE; | |
2363 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2364 | server->caps |= NFS_CAP_NLINK; | |
2365 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2366 | server->caps |= NFS_CAP_OWNER; | |
2367 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2368 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2369 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2370 | server->caps |= NFS_CAP_ATIME; | |
2371 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2372 | server->caps |= NFS_CAP_CTIME; | |
2373 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2374 | server->caps |= NFS_CAP_MTIME; | |
2375 | ||
2376 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); | |
2377 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2378 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
2379 | server->acl_bitmask = res.acl_bitmask; | |
2380 | server->fh_expire_type = res.fh_expire_type; | |
2381 | } | |
2382 | ||
2383 | return status; | |
2384 | } | |
2385 | ||
2386 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2387 | { | |
2388 | struct nfs4_exception exception = { }; | |
2389 | int err; | |
2390 | do { | |
2391 | err = nfs4_handle_exception(server, | |
2392 | _nfs4_server_capabilities(server, fhandle), | |
2393 | &exception); | |
2394 | } while (exception.retry); | |
2395 | return err; | |
2396 | } | |
2397 | ||
2398 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2399 | struct nfs_fsinfo *info) | |
2400 | { | |
2401 | struct nfs4_lookup_root_arg args = { | |
2402 | .bitmask = nfs4_fattr_bitmap, | |
2403 | }; | |
2404 | struct nfs4_lookup_res res = { | |
2405 | .server = server, | |
2406 | .fattr = info->fattr, | |
2407 | .fh = fhandle, | |
2408 | }; | |
2409 | struct rpc_message msg = { | |
2410 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2411 | .rpc_argp = &args, | |
2412 | .rpc_resp = &res, | |
2413 | }; | |
2414 | ||
2415 | nfs_fattr_init(info->fattr); | |
2416 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2417 | } | |
2418 | ||
2419 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2420 | struct nfs_fsinfo *info) | |
2421 | { | |
2422 | struct nfs4_exception exception = { }; | |
2423 | int err; | |
2424 | do { | |
2425 | err = _nfs4_lookup_root(server, fhandle, info); | |
2426 | switch (err) { | |
2427 | case 0: | |
2428 | case -NFS4ERR_WRONGSEC: | |
2429 | goto out; | |
2430 | default: | |
2431 | err = nfs4_handle_exception(server, err, &exception); | |
2432 | } | |
2433 | } while (exception.retry); | |
2434 | out: | |
2435 | return err; | |
2436 | } | |
2437 | ||
2438 | static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
2439 | struct nfs_fsinfo *info, rpc_authflavor_t flavor) | |
2440 | { | |
2441 | struct rpc_auth *auth; | |
2442 | int ret; | |
2443 | ||
2444 | auth = rpcauth_create(flavor, server->client); | |
2445 | if (IS_ERR(auth)) { | |
2446 | ret = -EIO; | |
2447 | goto out; | |
2448 | } | |
2449 | ret = nfs4_lookup_root(server, fhandle, info); | |
2450 | out: | |
2451 | return ret; | |
2452 | } | |
2453 | ||
2454 | static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
2455 | struct nfs_fsinfo *info) | |
2456 | { | |
2457 | int i, len, status = 0; | |
2458 | rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS]; | |
2459 | ||
2460 | len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array)); | |
2461 | if (len < 0) | |
2462 | return len; | |
2463 | ||
2464 | for (i = 0; i < len; i++) { | |
2465 | /* AUTH_UNIX is the default flavor if none was specified, | |
2466 | * thus has already been tried. */ | |
2467 | if (flav_array[i] == RPC_AUTH_UNIX) | |
2468 | continue; | |
2469 | ||
2470 | status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]); | |
2471 | if (status == -NFS4ERR_WRONGSEC || status == -EACCES) | |
2472 | continue; | |
2473 | break; | |
2474 | } | |
2475 | /* | |
2476 | * -EACCESS could mean that the user doesn't have correct permissions | |
2477 | * to access the mount. It could also mean that we tried to mount | |
2478 | * with a gss auth flavor, but rpc.gssd isn't running. Either way, | |
2479 | * existing mount programs don't handle -EACCES very well so it should | |
2480 | * be mapped to -EPERM instead. | |
2481 | */ | |
2482 | if (status == -EACCES) | |
2483 | status = -EPERM; | |
2484 | return status; | |
2485 | } | |
2486 | ||
2487 | /* | |
2488 | * get the file handle for the "/" directory on the server | |
2489 | */ | |
2490 | int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, | |
2491 | struct nfs_fsinfo *info) | |
2492 | { | |
2493 | int minor_version = server->nfs_client->cl_minorversion; | |
2494 | int status = nfs4_lookup_root(server, fhandle, info); | |
2495 | if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR)) | |
2496 | /* | |
2497 | * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM | |
2498 | * by nfs4_map_errors() as this function exits. | |
2499 | */ | |
2500 | status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info); | |
2501 | if (status == 0) | |
2502 | status = nfs4_server_capabilities(server, fhandle); | |
2503 | if (status == 0) | |
2504 | status = nfs4_do_fsinfo(server, fhandle, info); | |
2505 | return nfs4_map_errors(status); | |
2506 | } | |
2507 | ||
2508 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, | |
2509 | struct nfs_fsinfo *info) | |
2510 | { | |
2511 | int error; | |
2512 | struct nfs_fattr *fattr = info->fattr; | |
2513 | ||
2514 | error = nfs4_server_capabilities(server, mntfh); | |
2515 | if (error < 0) { | |
2516 | dprintk("nfs4_get_root: getcaps error = %d\n", -error); | |
2517 | return error; | |
2518 | } | |
2519 | ||
2520 | error = nfs4_proc_getattr(server, mntfh, fattr); | |
2521 | if (error < 0) { | |
2522 | dprintk("nfs4_get_root: getattr error = %d\n", -error); | |
2523 | return error; | |
2524 | } | |
2525 | ||
2526 | if (fattr->valid & NFS_ATTR_FATTR_FSID && | |
2527 | !nfs_fsid_equal(&server->fsid, &fattr->fsid)) | |
2528 | memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); | |
2529 | ||
2530 | return error; | |
2531 | } | |
2532 | ||
2533 | /* | |
2534 | * Get locations and (maybe) other attributes of a referral. | |
2535 | * Note that we'll actually follow the referral later when | |
2536 | * we detect fsid mismatch in inode revalidation | |
2537 | */ | |
2538 | static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, | |
2539 | const struct qstr *name, struct nfs_fattr *fattr, | |
2540 | struct nfs_fh *fhandle) | |
2541 | { | |
2542 | int status = -ENOMEM; | |
2543 | struct page *page = NULL; | |
2544 | struct nfs4_fs_locations *locations = NULL; | |
2545 | ||
2546 | page = alloc_page(GFP_KERNEL); | |
2547 | if (page == NULL) | |
2548 | goto out; | |
2549 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2550 | if (locations == NULL) | |
2551 | goto out; | |
2552 | ||
2553 | status = nfs4_proc_fs_locations(client, dir, name, locations, page); | |
2554 | if (status != 0) | |
2555 | goto out; | |
2556 | /* Make sure server returned a different fsid for the referral */ | |
2557 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
2558 | dprintk("%s: server did not return a different fsid for" | |
2559 | " a referral at %s\n", __func__, name->name); | |
2560 | status = -EIO; | |
2561 | goto out; | |
2562 | } | |
2563 | /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ | |
2564 | nfs_fixup_referral_attributes(&locations->fattr); | |
2565 | ||
2566 | /* replace the lookup nfs_fattr with the locations nfs_fattr */ | |
2567 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2568 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2569 | out: | |
2570 | if (page) | |
2571 | __free_page(page); | |
2572 | kfree(locations); | |
2573 | return status; | |
2574 | } | |
2575 | ||
2576 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2577 | { | |
2578 | struct nfs4_getattr_arg args = { | |
2579 | .fh = fhandle, | |
2580 | .bitmask = server->attr_bitmask, | |
2581 | }; | |
2582 | struct nfs4_getattr_res res = { | |
2583 | .fattr = fattr, | |
2584 | .server = server, | |
2585 | }; | |
2586 | struct rpc_message msg = { | |
2587 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2588 | .rpc_argp = &args, | |
2589 | .rpc_resp = &res, | |
2590 | }; | |
2591 | ||
2592 | nfs_fattr_init(fattr); | |
2593 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2594 | } | |
2595 | ||
2596 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2597 | { | |
2598 | struct nfs4_exception exception = { }; | |
2599 | int err; | |
2600 | do { | |
2601 | err = nfs4_handle_exception(server, | |
2602 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2603 | &exception); | |
2604 | } while (exception.retry); | |
2605 | return err; | |
2606 | } | |
2607 | ||
2608 | /* | |
2609 | * The file is not closed if it is opened due to the a request to change | |
2610 | * the size of the file. The open call will not be needed once the | |
2611 | * VFS layer lookup-intents are implemented. | |
2612 | * | |
2613 | * Close is called when the inode is destroyed. | |
2614 | * If we haven't opened the file for O_WRONLY, we | |
2615 | * need to in the size_change case to obtain a stateid. | |
2616 | * | |
2617 | * Got race? | |
2618 | * Because OPEN is always done by name in nfsv4, it is | |
2619 | * possible that we opened a different file by the same | |
2620 | * name. We can recognize this race condition, but we | |
2621 | * can't do anything about it besides returning an error. | |
2622 | * | |
2623 | * This will be fixed with VFS changes (lookup-intent). | |
2624 | */ | |
2625 | static int | |
2626 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2627 | struct iattr *sattr) | |
2628 | { | |
2629 | struct inode *inode = dentry->d_inode; | |
2630 | struct rpc_cred *cred = NULL; | |
2631 | struct nfs4_state *state = NULL; | |
2632 | int status; | |
2633 | ||
2634 | if (pnfs_ld_layoutret_on_setattr(inode)) | |
2635 | pnfs_return_layout(inode); | |
2636 | ||
2637 | nfs_fattr_init(fattr); | |
2638 | ||
2639 | /* Deal with open(O_TRUNC) */ | |
2640 | if (sattr->ia_valid & ATTR_OPEN) | |
2641 | sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN); | |
2642 | ||
2643 | /* Optimization: if the end result is no change, don't RPC */ | |
2644 | if ((sattr->ia_valid & ~(ATTR_FILE)) == 0) | |
2645 | return 0; | |
2646 | ||
2647 | /* Search for an existing open(O_WRITE) file */ | |
2648 | if (sattr->ia_valid & ATTR_FILE) { | |
2649 | struct nfs_open_context *ctx; | |
2650 | ||
2651 | ctx = nfs_file_open_context(sattr->ia_file); | |
2652 | if (ctx) { | |
2653 | cred = ctx->cred; | |
2654 | state = ctx->state; | |
2655 | } | |
2656 | } | |
2657 | ||
2658 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); | |
2659 | if (status == 0) | |
2660 | nfs_setattr_update_inode(inode, sattr); | |
2661 | return status; | |
2662 | } | |
2663 | ||
2664 | static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, | |
2665 | const struct qstr *name, struct nfs_fh *fhandle, | |
2666 | struct nfs_fattr *fattr) | |
2667 | { | |
2668 | struct nfs_server *server = NFS_SERVER(dir); | |
2669 | int status; | |
2670 | struct nfs4_lookup_arg args = { | |
2671 | .bitmask = server->attr_bitmask, | |
2672 | .dir_fh = NFS_FH(dir), | |
2673 | .name = name, | |
2674 | }; | |
2675 | struct nfs4_lookup_res res = { | |
2676 | .server = server, | |
2677 | .fattr = fattr, | |
2678 | .fh = fhandle, | |
2679 | }; | |
2680 | struct rpc_message msg = { | |
2681 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2682 | .rpc_argp = &args, | |
2683 | .rpc_resp = &res, | |
2684 | }; | |
2685 | ||
2686 | nfs_fattr_init(fattr); | |
2687 | ||
2688 | dprintk("NFS call lookup %s\n", name->name); | |
2689 | status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2690 | dprintk("NFS reply lookup: %d\n", status); | |
2691 | return status; | |
2692 | } | |
2693 | ||
2694 | static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) | |
2695 | { | |
2696 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
2697 | NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; | |
2698 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
2699 | fattr->nlink = 2; | |
2700 | } | |
2701 | ||
2702 | static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, | |
2703 | struct qstr *name, struct nfs_fh *fhandle, | |
2704 | struct nfs_fattr *fattr) | |
2705 | { | |
2706 | struct nfs4_exception exception = { }; | |
2707 | struct rpc_clnt *client = *clnt; | |
2708 | int err; | |
2709 | do { | |
2710 | err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr); | |
2711 | switch (err) { | |
2712 | case -NFS4ERR_BADNAME: | |
2713 | err = -ENOENT; | |
2714 | goto out; | |
2715 | case -NFS4ERR_MOVED: | |
2716 | err = nfs4_get_referral(client, dir, name, fattr, fhandle); | |
2717 | goto out; | |
2718 | case -NFS4ERR_WRONGSEC: | |
2719 | err = -EPERM; | |
2720 | if (client != *clnt) | |
2721 | goto out; | |
2722 | ||
2723 | client = nfs4_create_sec_client(client, dir, name); | |
2724 | if (IS_ERR(client)) | |
2725 | return PTR_ERR(client); | |
2726 | ||
2727 | exception.retry = 1; | |
2728 | break; | |
2729 | default: | |
2730 | err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); | |
2731 | } | |
2732 | } while (exception.retry); | |
2733 | ||
2734 | out: | |
2735 | if (err == 0) | |
2736 | *clnt = client; | |
2737 | else if (client != *clnt) | |
2738 | rpc_shutdown_client(client); | |
2739 | ||
2740 | return err; | |
2741 | } | |
2742 | ||
2743 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, | |
2744 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2745 | { | |
2746 | int status; | |
2747 | struct rpc_clnt *client = NFS_CLIENT(dir); | |
2748 | ||
2749 | status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); | |
2750 | if (client != NFS_CLIENT(dir)) { | |
2751 | rpc_shutdown_client(client); | |
2752 | nfs_fixup_secinfo_attributes(fattr); | |
2753 | } | |
2754 | return status; | |
2755 | } | |
2756 | ||
2757 | struct rpc_clnt * | |
2758 | nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, | |
2759 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2760 | { | |
2761 | int status; | |
2762 | struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir)); | |
2763 | ||
2764 | status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); | |
2765 | if (status < 0) { | |
2766 | rpc_shutdown_client(client); | |
2767 | return ERR_PTR(status); | |
2768 | } | |
2769 | return client; | |
2770 | } | |
2771 | ||
2772 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2773 | { | |
2774 | struct nfs_server *server = NFS_SERVER(inode); | |
2775 | struct nfs4_accessargs args = { | |
2776 | .fh = NFS_FH(inode), | |
2777 | .bitmask = server->cache_consistency_bitmask, | |
2778 | }; | |
2779 | struct nfs4_accessres res = { | |
2780 | .server = server, | |
2781 | }; | |
2782 | struct rpc_message msg = { | |
2783 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2784 | .rpc_argp = &args, | |
2785 | .rpc_resp = &res, | |
2786 | .rpc_cred = entry->cred, | |
2787 | }; | |
2788 | int mode = entry->mask; | |
2789 | int status; | |
2790 | ||
2791 | /* | |
2792 | * Determine which access bits we want to ask for... | |
2793 | */ | |
2794 | if (mode & MAY_READ) | |
2795 | args.access |= NFS4_ACCESS_READ; | |
2796 | if (S_ISDIR(inode->i_mode)) { | |
2797 | if (mode & MAY_WRITE) | |
2798 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2799 | if (mode & MAY_EXEC) | |
2800 | args.access |= NFS4_ACCESS_LOOKUP; | |
2801 | } else { | |
2802 | if (mode & MAY_WRITE) | |
2803 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2804 | if (mode & MAY_EXEC) | |
2805 | args.access |= NFS4_ACCESS_EXECUTE; | |
2806 | } | |
2807 | ||
2808 | res.fattr = nfs_alloc_fattr(); | |
2809 | if (res.fattr == NULL) | |
2810 | return -ENOMEM; | |
2811 | ||
2812 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
2813 | if (!status) { | |
2814 | nfs_access_set_mask(entry, res.access); | |
2815 | nfs_refresh_inode(inode, res.fattr); | |
2816 | } | |
2817 | nfs_free_fattr(res.fattr); | |
2818 | return status; | |
2819 | } | |
2820 | ||
2821 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2822 | { | |
2823 | struct nfs4_exception exception = { }; | |
2824 | int err; | |
2825 | do { | |
2826 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2827 | _nfs4_proc_access(inode, entry), | |
2828 | &exception); | |
2829 | } while (exception.retry); | |
2830 | return err; | |
2831 | } | |
2832 | ||
2833 | /* | |
2834 | * TODO: For the time being, we don't try to get any attributes | |
2835 | * along with any of the zero-copy operations READ, READDIR, | |
2836 | * READLINK, WRITE. | |
2837 | * | |
2838 | * In the case of the first three, we want to put the GETATTR | |
2839 | * after the read-type operation -- this is because it is hard | |
2840 | * to predict the length of a GETATTR response in v4, and thus | |
2841 | * align the READ data correctly. This means that the GETATTR | |
2842 | * may end up partially falling into the page cache, and we should | |
2843 | * shift it into the 'tail' of the xdr_buf before processing. | |
2844 | * To do this efficiently, we need to know the total length | |
2845 | * of data received, which doesn't seem to be available outside | |
2846 | * of the RPC layer. | |
2847 | * | |
2848 | * In the case of WRITE, we also want to put the GETATTR after | |
2849 | * the operation -- in this case because we want to make sure | |
2850 | * we get the post-operation mtime and size. | |
2851 | * | |
2852 | * Both of these changes to the XDR layer would in fact be quite | |
2853 | * minor, but I decided to leave them for a subsequent patch. | |
2854 | */ | |
2855 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2856 | unsigned int pgbase, unsigned int pglen) | |
2857 | { | |
2858 | struct nfs4_readlink args = { | |
2859 | .fh = NFS_FH(inode), | |
2860 | .pgbase = pgbase, | |
2861 | .pglen = pglen, | |
2862 | .pages = &page, | |
2863 | }; | |
2864 | struct nfs4_readlink_res res; | |
2865 | struct rpc_message msg = { | |
2866 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2867 | .rpc_argp = &args, | |
2868 | .rpc_resp = &res, | |
2869 | }; | |
2870 | ||
2871 | return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); | |
2872 | } | |
2873 | ||
2874 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2875 | unsigned int pgbase, unsigned int pglen) | |
2876 | { | |
2877 | struct nfs4_exception exception = { }; | |
2878 | int err; | |
2879 | do { | |
2880 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2881 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2882 | &exception); | |
2883 | } while (exception.retry); | |
2884 | return err; | |
2885 | } | |
2886 | ||
2887 | /* | |
2888 | * This is just for mknod. open(O_CREAT) will always do ->open_context(). | |
2889 | */ | |
2890 | static int | |
2891 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
2892 | int flags) | |
2893 | { | |
2894 | struct nfs_open_context *ctx; | |
2895 | struct nfs4_state *state; | |
2896 | int status = 0; | |
2897 | ||
2898 | ctx = alloc_nfs_open_context(dentry, FMODE_READ); | |
2899 | if (IS_ERR(ctx)) | |
2900 | return PTR_ERR(ctx); | |
2901 | ||
2902 | sattr->ia_mode &= ~current_umask(); | |
2903 | state = nfs4_do_open(dir, dentry, ctx->mode, | |
2904 | flags, sattr, ctx->cred, | |
2905 | &ctx->mdsthreshold); | |
2906 | d_drop(dentry); | |
2907 | if (IS_ERR(state)) { | |
2908 | status = PTR_ERR(state); | |
2909 | goto out; | |
2910 | } | |
2911 | d_add(dentry, igrab(state->inode)); | |
2912 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
2913 | ctx->state = state; | |
2914 | out: | |
2915 | put_nfs_open_context(ctx); | |
2916 | return status; | |
2917 | } | |
2918 | ||
2919 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2920 | { | |
2921 | struct nfs_server *server = NFS_SERVER(dir); | |
2922 | struct nfs_removeargs args = { | |
2923 | .fh = NFS_FH(dir), | |
2924 | .name = *name, | |
2925 | }; | |
2926 | struct nfs_removeres res = { | |
2927 | .server = server, | |
2928 | }; | |
2929 | struct rpc_message msg = { | |
2930 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
2931 | .rpc_argp = &args, | |
2932 | .rpc_resp = &res, | |
2933 | }; | |
2934 | int status; | |
2935 | ||
2936 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); | |
2937 | if (status == 0) | |
2938 | update_changeattr(dir, &res.cinfo); | |
2939 | return status; | |
2940 | } | |
2941 | ||
2942 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2943 | { | |
2944 | struct nfs4_exception exception = { }; | |
2945 | int err; | |
2946 | do { | |
2947 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2948 | _nfs4_proc_remove(dir, name), | |
2949 | &exception); | |
2950 | } while (exception.retry); | |
2951 | return err; | |
2952 | } | |
2953 | ||
2954 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) | |
2955 | { | |
2956 | struct nfs_server *server = NFS_SERVER(dir); | |
2957 | struct nfs_removeargs *args = msg->rpc_argp; | |
2958 | struct nfs_removeres *res = msg->rpc_resp; | |
2959 | ||
2960 | res->server = server; | |
2961 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
2962 | nfs41_init_sequence(&args->seq_args, &res->seq_res, 1); | |
2963 | } | |
2964 | ||
2965 | static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) | |
2966 | { | |
2967 | nfs4_setup_sequence(NFS_SERVER(data->dir), | |
2968 | &data->args.seq_args, | |
2969 | &data->res.seq_res, | |
2970 | task); | |
2971 | } | |
2972 | ||
2973 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) | |
2974 | { | |
2975 | struct nfs_removeres *res = task->tk_msg.rpc_resp; | |
2976 | ||
2977 | if (!nfs4_sequence_done(task, &res->seq_res)) | |
2978 | return 0; | |
2979 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
2980 | return 0; | |
2981 | update_changeattr(dir, &res->cinfo); | |
2982 | return 1; | |
2983 | } | |
2984 | ||
2985 | static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) | |
2986 | { | |
2987 | struct nfs_server *server = NFS_SERVER(dir); | |
2988 | struct nfs_renameargs *arg = msg->rpc_argp; | |
2989 | struct nfs_renameres *res = msg->rpc_resp; | |
2990 | ||
2991 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; | |
2992 | res->server = server; | |
2993 | nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1); | |
2994 | } | |
2995 | ||
2996 | static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) | |
2997 | { | |
2998 | nfs4_setup_sequence(NFS_SERVER(data->old_dir), | |
2999 | &data->args.seq_args, | |
3000 | &data->res.seq_res, | |
3001 | task); | |
3002 | } | |
3003 | ||
3004 | static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, | |
3005 | struct inode *new_dir) | |
3006 | { | |
3007 | struct nfs_renameres *res = task->tk_msg.rpc_resp; | |
3008 | ||
3009 | if (!nfs4_sequence_done(task, &res->seq_res)) | |
3010 | return 0; | |
3011 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
3012 | return 0; | |
3013 | ||
3014 | update_changeattr(old_dir, &res->old_cinfo); | |
3015 | update_changeattr(new_dir, &res->new_cinfo); | |
3016 | return 1; | |
3017 | } | |
3018 | ||
3019 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
3020 | struct inode *new_dir, struct qstr *new_name) | |
3021 | { | |
3022 | struct nfs_server *server = NFS_SERVER(old_dir); | |
3023 | struct nfs_renameargs arg = { | |
3024 | .old_dir = NFS_FH(old_dir), | |
3025 | .new_dir = NFS_FH(new_dir), | |
3026 | .old_name = old_name, | |
3027 | .new_name = new_name, | |
3028 | }; | |
3029 | struct nfs_renameres res = { | |
3030 | .server = server, | |
3031 | }; | |
3032 | struct rpc_message msg = { | |
3033 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
3034 | .rpc_argp = &arg, | |
3035 | .rpc_resp = &res, | |
3036 | }; | |
3037 | int status = -ENOMEM; | |
3038 | ||
3039 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
3040 | if (!status) { | |
3041 | update_changeattr(old_dir, &res.old_cinfo); | |
3042 | update_changeattr(new_dir, &res.new_cinfo); | |
3043 | } | |
3044 | return status; | |
3045 | } | |
3046 | ||
3047 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
3048 | struct inode *new_dir, struct qstr *new_name) | |
3049 | { | |
3050 | struct nfs4_exception exception = { }; | |
3051 | int err; | |
3052 | do { | |
3053 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
3054 | _nfs4_proc_rename(old_dir, old_name, | |
3055 | new_dir, new_name), | |
3056 | &exception); | |
3057 | } while (exception.retry); | |
3058 | return err; | |
3059 | } | |
3060 | ||
3061 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
3062 | { | |
3063 | struct nfs_server *server = NFS_SERVER(inode); | |
3064 | struct nfs4_link_arg arg = { | |
3065 | .fh = NFS_FH(inode), | |
3066 | .dir_fh = NFS_FH(dir), | |
3067 | .name = name, | |
3068 | .bitmask = server->attr_bitmask, | |
3069 | }; | |
3070 | struct nfs4_link_res res = { | |
3071 | .server = server, | |
3072 | }; | |
3073 | struct rpc_message msg = { | |
3074 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
3075 | .rpc_argp = &arg, | |
3076 | .rpc_resp = &res, | |
3077 | }; | |
3078 | int status = -ENOMEM; | |
3079 | ||
3080 | res.fattr = nfs_alloc_fattr(); | |
3081 | if (res.fattr == NULL) | |
3082 | goto out; | |
3083 | ||
3084 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
3085 | if (!status) { | |
3086 | update_changeattr(dir, &res.cinfo); | |
3087 | nfs_post_op_update_inode(inode, res.fattr); | |
3088 | } | |
3089 | out: | |
3090 | nfs_free_fattr(res.fattr); | |
3091 | return status; | |
3092 | } | |
3093 | ||
3094 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
3095 | { | |
3096 | struct nfs4_exception exception = { }; | |
3097 | int err; | |
3098 | do { | |
3099 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3100 | _nfs4_proc_link(inode, dir, name), | |
3101 | &exception); | |
3102 | } while (exception.retry); | |
3103 | return err; | |
3104 | } | |
3105 | ||
3106 | struct nfs4_createdata { | |
3107 | struct rpc_message msg; | |
3108 | struct nfs4_create_arg arg; | |
3109 | struct nfs4_create_res res; | |
3110 | struct nfs_fh fh; | |
3111 | struct nfs_fattr fattr; | |
3112 | }; | |
3113 | ||
3114 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
3115 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
3116 | { | |
3117 | struct nfs4_createdata *data; | |
3118 | ||
3119 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
3120 | if (data != NULL) { | |
3121 | struct nfs_server *server = NFS_SERVER(dir); | |
3122 | ||
3123 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
3124 | data->msg.rpc_argp = &data->arg; | |
3125 | data->msg.rpc_resp = &data->res; | |
3126 | data->arg.dir_fh = NFS_FH(dir); | |
3127 | data->arg.server = server; | |
3128 | data->arg.name = name; | |
3129 | data->arg.attrs = sattr; | |
3130 | data->arg.ftype = ftype; | |
3131 | data->arg.bitmask = server->attr_bitmask; | |
3132 | data->res.server = server; | |
3133 | data->res.fh = &data->fh; | |
3134 | data->res.fattr = &data->fattr; | |
3135 | nfs_fattr_init(data->res.fattr); | |
3136 | } | |
3137 | return data; | |
3138 | } | |
3139 | ||
3140 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
3141 | { | |
3142 | int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, | |
3143 | &data->arg.seq_args, &data->res.seq_res, 1); | |
3144 | if (status == 0) { | |
3145 | update_changeattr(dir, &data->res.dir_cinfo); | |
3146 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
3147 | } | |
3148 | return status; | |
3149 | } | |
3150 | ||
3151 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
3152 | { | |
3153 | kfree(data); | |
3154 | } | |
3155 | ||
3156 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
3157 | struct page *page, unsigned int len, struct iattr *sattr) | |
3158 | { | |
3159 | struct nfs4_createdata *data; | |
3160 | int status = -ENAMETOOLONG; | |
3161 | ||
3162 | if (len > NFS4_MAXPATHLEN) | |
3163 | goto out; | |
3164 | ||
3165 | status = -ENOMEM; | |
3166 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
3167 | if (data == NULL) | |
3168 | goto out; | |
3169 | ||
3170 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
3171 | data->arg.u.symlink.pages = &page; | |
3172 | data->arg.u.symlink.len = len; | |
3173 | ||
3174 | status = nfs4_do_create(dir, dentry, data); | |
3175 | ||
3176 | nfs4_free_createdata(data); | |
3177 | out: | |
3178 | return status; | |
3179 | } | |
3180 | ||
3181 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
3182 | struct page *page, unsigned int len, struct iattr *sattr) | |
3183 | { | |
3184 | struct nfs4_exception exception = { }; | |
3185 | int err; | |
3186 | do { | |
3187 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3188 | _nfs4_proc_symlink(dir, dentry, page, | |
3189 | len, sattr), | |
3190 | &exception); | |
3191 | } while (exception.retry); | |
3192 | return err; | |
3193 | } | |
3194 | ||
3195 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
3196 | struct iattr *sattr) | |
3197 | { | |
3198 | struct nfs4_createdata *data; | |
3199 | int status = -ENOMEM; | |
3200 | ||
3201 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); | |
3202 | if (data == NULL) | |
3203 | goto out; | |
3204 | ||
3205 | status = nfs4_do_create(dir, dentry, data); | |
3206 | ||
3207 | nfs4_free_createdata(data); | |
3208 | out: | |
3209 | return status; | |
3210 | } | |
3211 | ||
3212 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
3213 | struct iattr *sattr) | |
3214 | { | |
3215 | struct nfs4_exception exception = { }; | |
3216 | int err; | |
3217 | ||
3218 | sattr->ia_mode &= ~current_umask(); | |
3219 | do { | |
3220 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3221 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
3222 | &exception); | |
3223 | } while (exception.retry); | |
3224 | return err; | |
3225 | } | |
3226 | ||
3227 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
3228 | u64 cookie, struct page **pages, unsigned int count, int plus) | |
3229 | { | |
3230 | struct inode *dir = dentry->d_inode; | |
3231 | struct nfs4_readdir_arg args = { | |
3232 | .fh = NFS_FH(dir), | |
3233 | .pages = pages, | |
3234 | .pgbase = 0, | |
3235 | .count = count, | |
3236 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, | |
3237 | .plus = plus, | |
3238 | }; | |
3239 | struct nfs4_readdir_res res; | |
3240 | struct rpc_message msg = { | |
3241 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
3242 | .rpc_argp = &args, | |
3243 | .rpc_resp = &res, | |
3244 | .rpc_cred = cred, | |
3245 | }; | |
3246 | int status; | |
3247 | ||
3248 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, | |
3249 | dentry->d_parent->d_name.name, | |
3250 | dentry->d_name.name, | |
3251 | (unsigned long long)cookie); | |
3252 | nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); | |
3253 | res.pgbase = args.pgbase; | |
3254 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); | |
3255 | if (status >= 0) { | |
3256 | memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); | |
3257 | status += args.pgbase; | |
3258 | } | |
3259 | ||
3260 | nfs_invalidate_atime(dir); | |
3261 | ||
3262 | dprintk("%s: returns %d\n", __func__, status); | |
3263 | return status; | |
3264 | } | |
3265 | ||
3266 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
3267 | u64 cookie, struct page **pages, unsigned int count, int plus) | |
3268 | { | |
3269 | struct nfs4_exception exception = { }; | |
3270 | int err; | |
3271 | do { | |
3272 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
3273 | _nfs4_proc_readdir(dentry, cred, cookie, | |
3274 | pages, count, plus), | |
3275 | &exception); | |
3276 | } while (exception.retry); | |
3277 | return err; | |
3278 | } | |
3279 | ||
3280 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
3281 | struct iattr *sattr, dev_t rdev) | |
3282 | { | |
3283 | struct nfs4_createdata *data; | |
3284 | int mode = sattr->ia_mode; | |
3285 | int status = -ENOMEM; | |
3286 | ||
3287 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
3288 | if (data == NULL) | |
3289 | goto out; | |
3290 | ||
3291 | if (S_ISFIFO(mode)) | |
3292 | data->arg.ftype = NF4FIFO; | |
3293 | else if (S_ISBLK(mode)) { | |
3294 | data->arg.ftype = NF4BLK; | |
3295 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
3296 | data->arg.u.device.specdata2 = MINOR(rdev); | |
3297 | } | |
3298 | else if (S_ISCHR(mode)) { | |
3299 | data->arg.ftype = NF4CHR; | |
3300 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
3301 | data->arg.u.device.specdata2 = MINOR(rdev); | |
3302 | } else if (!S_ISSOCK(mode)) { | |
3303 | status = -EINVAL; | |
3304 | goto out_free; | |
3305 | } | |
3306 | ||
3307 | status = nfs4_do_create(dir, dentry, data); | |
3308 | out_free: | |
3309 | nfs4_free_createdata(data); | |
3310 | out: | |
3311 | return status; | |
3312 | } | |
3313 | ||
3314 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
3315 | struct iattr *sattr, dev_t rdev) | |
3316 | { | |
3317 | struct nfs4_exception exception = { }; | |
3318 | int err; | |
3319 | ||
3320 | sattr->ia_mode &= ~current_umask(); | |
3321 | do { | |
3322 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
3323 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
3324 | &exception); | |
3325 | } while (exception.retry); | |
3326 | return err; | |
3327 | } | |
3328 | ||
3329 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
3330 | struct nfs_fsstat *fsstat) | |
3331 | { | |
3332 | struct nfs4_statfs_arg args = { | |
3333 | .fh = fhandle, | |
3334 | .bitmask = server->attr_bitmask, | |
3335 | }; | |
3336 | struct nfs4_statfs_res res = { | |
3337 | .fsstat = fsstat, | |
3338 | }; | |
3339 | struct rpc_message msg = { | |
3340 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
3341 | .rpc_argp = &args, | |
3342 | .rpc_resp = &res, | |
3343 | }; | |
3344 | ||
3345 | nfs_fattr_init(fsstat->fattr); | |
3346 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3347 | } | |
3348 | ||
3349 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
3350 | { | |
3351 | struct nfs4_exception exception = { }; | |
3352 | int err; | |
3353 | do { | |
3354 | err = nfs4_handle_exception(server, | |
3355 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
3356 | &exception); | |
3357 | } while (exception.retry); | |
3358 | return err; | |
3359 | } | |
3360 | ||
3361 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
3362 | struct nfs_fsinfo *fsinfo) | |
3363 | { | |
3364 | struct nfs4_fsinfo_arg args = { | |
3365 | .fh = fhandle, | |
3366 | .bitmask = server->attr_bitmask, | |
3367 | }; | |
3368 | struct nfs4_fsinfo_res res = { | |
3369 | .fsinfo = fsinfo, | |
3370 | }; | |
3371 | struct rpc_message msg = { | |
3372 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
3373 | .rpc_argp = &args, | |
3374 | .rpc_resp = &res, | |
3375 | }; | |
3376 | ||
3377 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3378 | } | |
3379 | ||
3380 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3381 | { | |
3382 | struct nfs4_exception exception = { }; | |
3383 | int err; | |
3384 | ||
3385 | do { | |
3386 | err = nfs4_handle_exception(server, | |
3387 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
3388 | &exception); | |
3389 | } while (exception.retry); | |
3390 | return err; | |
3391 | } | |
3392 | ||
3393 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3394 | { | |
3395 | int error; | |
3396 | ||
3397 | nfs_fattr_init(fsinfo->fattr); | |
3398 | error = nfs4_do_fsinfo(server, fhandle, fsinfo); | |
3399 | if (error == 0) { | |
3400 | /* block layout checks this! */ | |
3401 | server->pnfs_blksize = fsinfo->blksize; | |
3402 | set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); | |
3403 | } | |
3404 | ||
3405 | return error; | |
3406 | } | |
3407 | ||
3408 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3409 | struct nfs_pathconf *pathconf) | |
3410 | { | |
3411 | struct nfs4_pathconf_arg args = { | |
3412 | .fh = fhandle, | |
3413 | .bitmask = server->attr_bitmask, | |
3414 | }; | |
3415 | struct nfs4_pathconf_res res = { | |
3416 | .pathconf = pathconf, | |
3417 | }; | |
3418 | struct rpc_message msg = { | |
3419 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
3420 | .rpc_argp = &args, | |
3421 | .rpc_resp = &res, | |
3422 | }; | |
3423 | ||
3424 | /* None of the pathconf attributes are mandatory to implement */ | |
3425 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
3426 | memset(pathconf, 0, sizeof(*pathconf)); | |
3427 | return 0; | |
3428 | } | |
3429 | ||
3430 | nfs_fattr_init(pathconf->fattr); | |
3431 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
3432 | } | |
3433 | ||
3434 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3435 | struct nfs_pathconf *pathconf) | |
3436 | { | |
3437 | struct nfs4_exception exception = { }; | |
3438 | int err; | |
3439 | ||
3440 | do { | |
3441 | err = nfs4_handle_exception(server, | |
3442 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
3443 | &exception); | |
3444 | } while (exception.retry); | |
3445 | return err; | |
3446 | } | |
3447 | ||
3448 | void __nfs4_read_done_cb(struct nfs_read_data *data) | |
3449 | { | |
3450 | nfs_invalidate_atime(data->header->inode); | |
3451 | } | |
3452 | ||
3453 | static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data) | |
3454 | { | |
3455 | struct nfs_server *server = NFS_SERVER(data->header->inode); | |
3456 | ||
3457 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { | |
3458 | rpc_restart_call_prepare(task); | |
3459 | return -EAGAIN; | |
3460 | } | |
3461 | ||
3462 | __nfs4_read_done_cb(data); | |
3463 | if (task->tk_status > 0) | |
3464 | renew_lease(server, data->timestamp); | |
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) | |
3469 | { | |
3470 | ||
3471 | dprintk("--> %s\n", __func__); | |
3472 | ||
3473 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3474 | return -EAGAIN; | |
3475 | ||
3476 | return data->read_done_cb ? data->read_done_cb(task, data) : | |
3477 | nfs4_read_done_cb(task, data); | |
3478 | } | |
3479 | ||
3480 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) | |
3481 | { | |
3482 | data->timestamp = jiffies; | |
3483 | data->read_done_cb = nfs4_read_done_cb; | |
3484 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; | |
3485 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); | |
3486 | } | |
3487 | ||
3488 | static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) | |
3489 | { | |
3490 | nfs4_setup_sequence(NFS_SERVER(data->header->inode), | |
3491 | &data->args.seq_args, | |
3492 | &data->res.seq_res, | |
3493 | task); | |
3494 | } | |
3495 | ||
3496 | static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) | |
3497 | { | |
3498 | struct inode *inode = data->header->inode; | |
3499 | ||
3500 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { | |
3501 | rpc_restart_call_prepare(task); | |
3502 | return -EAGAIN; | |
3503 | } | |
3504 | if (task->tk_status >= 0) { | |
3505 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
3506 | nfs_post_op_update_inode_force_wcc(inode, &data->fattr); | |
3507 | } | |
3508 | return 0; | |
3509 | } | |
3510 | ||
3511 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) | |
3512 | { | |
3513 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3514 | return -EAGAIN; | |
3515 | return data->write_done_cb ? data->write_done_cb(task, data) : | |
3516 | nfs4_write_done_cb(task, data); | |
3517 | } | |
3518 | ||
3519 | static | |
3520 | bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data) | |
3521 | { | |
3522 | const struct nfs_pgio_header *hdr = data->header; | |
3523 | ||
3524 | /* Don't request attributes for pNFS or O_DIRECT writes */ | |
3525 | if (data->ds_clp != NULL || hdr->dreq != NULL) | |
3526 | return false; | |
3527 | /* Otherwise, request attributes if and only if we don't hold | |
3528 | * a delegation | |
3529 | */ | |
3530 | return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; | |
3531 | } | |
3532 | ||
3533 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) | |
3534 | { | |
3535 | struct nfs_server *server = NFS_SERVER(data->header->inode); | |
3536 | ||
3537 | if (!nfs4_write_need_cache_consistency_data(data)) { | |
3538 | data->args.bitmask = NULL; | |
3539 | data->res.fattr = NULL; | |
3540 | } else | |
3541 | data->args.bitmask = server->cache_consistency_bitmask; | |
3542 | ||
3543 | if (!data->write_done_cb) | |
3544 | data->write_done_cb = nfs4_write_done_cb; | |
3545 | data->res.server = server; | |
3546 | data->timestamp = jiffies; | |
3547 | ||
3548 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; | |
3549 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
3550 | } | |
3551 | ||
3552 | static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) | |
3553 | { | |
3554 | nfs4_setup_sequence(NFS_SERVER(data->header->inode), | |
3555 | &data->args.seq_args, | |
3556 | &data->res.seq_res, | |
3557 | task); | |
3558 | } | |
3559 | ||
3560 | static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) | |
3561 | { | |
3562 | nfs4_setup_sequence(NFS_SERVER(data->inode), | |
3563 | &data->args.seq_args, | |
3564 | &data->res.seq_res, | |
3565 | task); | |
3566 | } | |
3567 | ||
3568 | static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) | |
3569 | { | |
3570 | struct inode *inode = data->inode; | |
3571 | ||
3572 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { | |
3573 | rpc_restart_call_prepare(task); | |
3574 | return -EAGAIN; | |
3575 | } | |
3576 | return 0; | |
3577 | } | |
3578 | ||
3579 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) | |
3580 | { | |
3581 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
3582 | return -EAGAIN; | |
3583 | return data->commit_done_cb(task, data); | |
3584 | } | |
3585 | ||
3586 | static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) | |
3587 | { | |
3588 | struct nfs_server *server = NFS_SERVER(data->inode); | |
3589 | ||
3590 | if (data->commit_done_cb == NULL) | |
3591 | data->commit_done_cb = nfs4_commit_done_cb; | |
3592 | data->res.server = server; | |
3593 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; | |
3594 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
3595 | } | |
3596 | ||
3597 | struct nfs4_renewdata { | |
3598 | struct nfs_client *client; | |
3599 | unsigned long timestamp; | |
3600 | }; | |
3601 | ||
3602 | /* | |
3603 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3604 | * standalone procedure for queueing an asynchronous RENEW. | |
3605 | */ | |
3606 | static void nfs4_renew_release(void *calldata) | |
3607 | { | |
3608 | struct nfs4_renewdata *data = calldata; | |
3609 | struct nfs_client *clp = data->client; | |
3610 | ||
3611 | if (atomic_read(&clp->cl_count) > 1) | |
3612 | nfs4_schedule_state_renewal(clp); | |
3613 | nfs_put_client(clp); | |
3614 | kfree(data); | |
3615 | } | |
3616 | ||
3617 | static void nfs4_renew_done(struct rpc_task *task, void *calldata) | |
3618 | { | |
3619 | struct nfs4_renewdata *data = calldata; | |
3620 | struct nfs_client *clp = data->client; | |
3621 | unsigned long timestamp = data->timestamp; | |
3622 | ||
3623 | if (task->tk_status < 0) { | |
3624 | /* Unless we're shutting down, schedule state recovery! */ | |
3625 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) | |
3626 | return; | |
3627 | if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { | |
3628 | nfs4_schedule_lease_recovery(clp); | |
3629 | return; | |
3630 | } | |
3631 | nfs4_schedule_path_down_recovery(clp); | |
3632 | } | |
3633 | do_renew_lease(clp, timestamp); | |
3634 | } | |
3635 | ||
3636 | static const struct rpc_call_ops nfs4_renew_ops = { | |
3637 | .rpc_call_done = nfs4_renew_done, | |
3638 | .rpc_release = nfs4_renew_release, | |
3639 | }; | |
3640 | ||
3641 | static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) | |
3642 | { | |
3643 | struct rpc_message msg = { | |
3644 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3645 | .rpc_argp = clp, | |
3646 | .rpc_cred = cred, | |
3647 | }; | |
3648 | struct nfs4_renewdata *data; | |
3649 | ||
3650 | if (renew_flags == 0) | |
3651 | return 0; | |
3652 | if (!atomic_inc_not_zero(&clp->cl_count)) | |
3653 | return -EIO; | |
3654 | data = kmalloc(sizeof(*data), GFP_NOFS); | |
3655 | if (data == NULL) | |
3656 | return -ENOMEM; | |
3657 | data->client = clp; | |
3658 | data->timestamp = jiffies; | |
3659 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
3660 | &nfs4_renew_ops, data); | |
3661 | } | |
3662 | ||
3663 | static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) | |
3664 | { | |
3665 | struct rpc_message msg = { | |
3666 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3667 | .rpc_argp = clp, | |
3668 | .rpc_cred = cred, | |
3669 | }; | |
3670 | unsigned long now = jiffies; | |
3671 | int status; | |
3672 | ||
3673 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3674 | if (status < 0) | |
3675 | return status; | |
3676 | do_renew_lease(clp, now); | |
3677 | return 0; | |
3678 | } | |
3679 | ||
3680 | static inline int nfs4_server_supports_acls(struct nfs_server *server) | |
3681 | { | |
3682 | return (server->caps & NFS_CAP_ACLS) | |
3683 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3684 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3685 | } | |
3686 | ||
3687 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that | |
3688 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on | |
3689 | * the stack. | |
3690 | */ | |
3691 | #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) | |
3692 | ||
3693 | static int buf_to_pages_noslab(const void *buf, size_t buflen, | |
3694 | struct page **pages, unsigned int *pgbase) | |
3695 | { | |
3696 | struct page *newpage, **spages; | |
3697 | int rc = 0; | |
3698 | size_t len; | |
3699 | spages = pages; | |
3700 | ||
3701 | do { | |
3702 | len = min_t(size_t, PAGE_SIZE, buflen); | |
3703 | newpage = alloc_page(GFP_KERNEL); | |
3704 | ||
3705 | if (newpage == NULL) | |
3706 | goto unwind; | |
3707 | memcpy(page_address(newpage), buf, len); | |
3708 | buf += len; | |
3709 | buflen -= len; | |
3710 | *pages++ = newpage; | |
3711 | rc++; | |
3712 | } while (buflen != 0); | |
3713 | ||
3714 | return rc; | |
3715 | ||
3716 | unwind: | |
3717 | for(; rc > 0; rc--) | |
3718 | __free_page(spages[rc-1]); | |
3719 | return -ENOMEM; | |
3720 | } | |
3721 | ||
3722 | struct nfs4_cached_acl { | |
3723 | int cached; | |
3724 | size_t len; | |
3725 | char data[0]; | |
3726 | }; | |
3727 | ||
3728 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3729 | { | |
3730 | struct nfs_inode *nfsi = NFS_I(inode); | |
3731 | ||
3732 | spin_lock(&inode->i_lock); | |
3733 | kfree(nfsi->nfs4_acl); | |
3734 | nfsi->nfs4_acl = acl; | |
3735 | spin_unlock(&inode->i_lock); | |
3736 | } | |
3737 | ||
3738 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3739 | { | |
3740 | nfs4_set_cached_acl(inode, NULL); | |
3741 | } | |
3742 | ||
3743 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3744 | { | |
3745 | struct nfs_inode *nfsi = NFS_I(inode); | |
3746 | struct nfs4_cached_acl *acl; | |
3747 | int ret = -ENOENT; | |
3748 | ||
3749 | spin_lock(&inode->i_lock); | |
3750 | acl = nfsi->nfs4_acl; | |
3751 | if (acl == NULL) | |
3752 | goto out; | |
3753 | if (buf == NULL) /* user is just asking for length */ | |
3754 | goto out_len; | |
3755 | if (acl->cached == 0) | |
3756 | goto out; | |
3757 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3758 | if (acl->len > buflen) | |
3759 | goto out; | |
3760 | memcpy(buf, acl->data, acl->len); | |
3761 | out_len: | |
3762 | ret = acl->len; | |
3763 | out: | |
3764 | spin_unlock(&inode->i_lock); | |
3765 | return ret; | |
3766 | } | |
3767 | ||
3768 | static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) | |
3769 | { | |
3770 | struct nfs4_cached_acl *acl; | |
3771 | size_t buflen = sizeof(*acl) + acl_len; | |
3772 | ||
3773 | if (buflen <= PAGE_SIZE) { | |
3774 | acl = kmalloc(buflen, GFP_KERNEL); | |
3775 | if (acl == NULL) | |
3776 | goto out; | |
3777 | acl->cached = 1; | |
3778 | _copy_from_pages(acl->data, pages, pgbase, acl_len); | |
3779 | } else { | |
3780 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3781 | if (acl == NULL) | |
3782 | goto out; | |
3783 | acl->cached = 0; | |
3784 | } | |
3785 | acl->len = acl_len; | |
3786 | out: | |
3787 | nfs4_set_cached_acl(inode, acl); | |
3788 | } | |
3789 | ||
3790 | /* | |
3791 | * The getxattr API returns the required buffer length when called with a | |
3792 | * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating | |
3793 | * the required buf. On a NULL buf, we send a page of data to the server | |
3794 | * guessing that the ACL request can be serviced by a page. If so, we cache | |
3795 | * up to the page of ACL data, and the 2nd call to getxattr is serviced by | |
3796 | * the cache. If not so, we throw away the page, and cache the required | |
3797 | * length. The next getxattr call will then produce another round trip to | |
3798 | * the server, this time with the input buf of the required size. | |
3799 | */ | |
3800 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3801 | { | |
3802 | struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; | |
3803 | struct nfs_getaclargs args = { | |
3804 | .fh = NFS_FH(inode), | |
3805 | .acl_pages = pages, | |
3806 | .acl_len = buflen, | |
3807 | }; | |
3808 | struct nfs_getaclres res = { | |
3809 | .acl_len = buflen, | |
3810 | }; | |
3811 | struct rpc_message msg = { | |
3812 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3813 | .rpc_argp = &args, | |
3814 | .rpc_resp = &res, | |
3815 | }; | |
3816 | unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); | |
3817 | int ret = -ENOMEM, i; | |
3818 | ||
3819 | /* As long as we're doing a round trip to the server anyway, | |
3820 | * let's be prepared for a page of acl data. */ | |
3821 | if (npages == 0) | |
3822 | npages = 1; | |
3823 | if (npages > ARRAY_SIZE(pages)) | |
3824 | return -ERANGE; | |
3825 | ||
3826 | for (i = 0; i < npages; i++) { | |
3827 | pages[i] = alloc_page(GFP_KERNEL); | |
3828 | if (!pages[i]) | |
3829 | goto out_free; | |
3830 | } | |
3831 | ||
3832 | /* for decoding across pages */ | |
3833 | res.acl_scratch = alloc_page(GFP_KERNEL); | |
3834 | if (!res.acl_scratch) | |
3835 | goto out_free; | |
3836 | ||
3837 | args.acl_len = npages * PAGE_SIZE; | |
3838 | args.acl_pgbase = 0; | |
3839 | ||
3840 | dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", | |
3841 | __func__, buf, buflen, npages, args.acl_len); | |
3842 | ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), | |
3843 | &msg, &args.seq_args, &res.seq_res, 0); | |
3844 | if (ret) | |
3845 | goto out_free; | |
3846 | ||
3847 | /* Handle the case where the passed-in buffer is too short */ | |
3848 | if (res.acl_flags & NFS4_ACL_TRUNC) { | |
3849 | /* Did the user only issue a request for the acl length? */ | |
3850 | if (buf == NULL) | |
3851 | goto out_ok; | |
3852 | ret = -ERANGE; | |
3853 | goto out_free; | |
3854 | } | |
3855 | nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); | |
3856 | if (buf) { | |
3857 | if (res.acl_len > buflen) { | |
3858 | ret = -ERANGE; | |
3859 | goto out_free; | |
3860 | } | |
3861 | _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); | |
3862 | } | |
3863 | out_ok: | |
3864 | ret = res.acl_len; | |
3865 | out_free: | |
3866 | for (i = 0; i < npages; i++) | |
3867 | if (pages[i]) | |
3868 | __free_page(pages[i]); | |
3869 | if (res.acl_scratch) | |
3870 | __free_page(res.acl_scratch); | |
3871 | return ret; | |
3872 | } | |
3873 | ||
3874 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3875 | { | |
3876 | struct nfs4_exception exception = { }; | |
3877 | ssize_t ret; | |
3878 | do { | |
3879 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3880 | if (ret >= 0) | |
3881 | break; | |
3882 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3883 | } while (exception.retry); | |
3884 | return ret; | |
3885 | } | |
3886 | ||
3887 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) | |
3888 | { | |
3889 | struct nfs_server *server = NFS_SERVER(inode); | |
3890 | int ret; | |
3891 | ||
3892 | if (!nfs4_server_supports_acls(server)) | |
3893 | return -EOPNOTSUPP; | |
3894 | ret = nfs_revalidate_inode(server, inode); | |
3895 | if (ret < 0) | |
3896 | return ret; | |
3897 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) | |
3898 | nfs_zap_acl_cache(inode); | |
3899 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3900 | if (ret != -ENOENT) | |
3901 | /* -ENOENT is returned if there is no ACL or if there is an ACL | |
3902 | * but no cached acl data, just the acl length */ | |
3903 | return ret; | |
3904 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3905 | } | |
3906 | ||
3907 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3908 | { | |
3909 | struct nfs_server *server = NFS_SERVER(inode); | |
3910 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3911 | struct nfs_setaclargs arg = { | |
3912 | .fh = NFS_FH(inode), | |
3913 | .acl_pages = pages, | |
3914 | .acl_len = buflen, | |
3915 | }; | |
3916 | struct nfs_setaclres res; | |
3917 | struct rpc_message msg = { | |
3918 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3919 | .rpc_argp = &arg, | |
3920 | .rpc_resp = &res, | |
3921 | }; | |
3922 | unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); | |
3923 | int ret, i; | |
3924 | ||
3925 | if (!nfs4_server_supports_acls(server)) | |
3926 | return -EOPNOTSUPP; | |
3927 | if (npages > ARRAY_SIZE(pages)) | |
3928 | return -ERANGE; | |
3929 | i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); | |
3930 | if (i < 0) | |
3931 | return i; | |
3932 | nfs4_inode_return_delegation(inode); | |
3933 | ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
3934 | ||
3935 | /* | |
3936 | * Free each page after tx, so the only ref left is | |
3937 | * held by the network stack | |
3938 | */ | |
3939 | for (; i > 0; i--) | |
3940 | put_page(pages[i-1]); | |
3941 | ||
3942 | /* | |
3943 | * Acl update can result in inode attribute update. | |
3944 | * so mark the attribute cache invalid. | |
3945 | */ | |
3946 | spin_lock(&inode->i_lock); | |
3947 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
3948 | spin_unlock(&inode->i_lock); | |
3949 | nfs_access_zap_cache(inode); | |
3950 | nfs_zap_acl_cache(inode); | |
3951 | return ret; | |
3952 | } | |
3953 | ||
3954 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3955 | { | |
3956 | struct nfs4_exception exception = { }; | |
3957 | int err; | |
3958 | do { | |
3959 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3960 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3961 | &exception); | |
3962 | } while (exception.retry); | |
3963 | return err; | |
3964 | } | |
3965 | ||
3966 | static int | |
3967 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) | |
3968 | { | |
3969 | struct nfs_client *clp = server->nfs_client; | |
3970 | ||
3971 | if (task->tk_status >= 0) | |
3972 | return 0; | |
3973 | switch(task->tk_status) { | |
3974 | case -NFS4ERR_DELEG_REVOKED: | |
3975 | case -NFS4ERR_ADMIN_REVOKED: | |
3976 | case -NFS4ERR_BAD_STATEID: | |
3977 | if (state == NULL) | |
3978 | break; | |
3979 | nfs_remove_bad_delegation(state->inode); | |
3980 | case -NFS4ERR_OPENMODE: | |
3981 | if (state == NULL) | |
3982 | break; | |
3983 | nfs4_schedule_stateid_recovery(server, state); | |
3984 | goto wait_on_recovery; | |
3985 | case -NFS4ERR_EXPIRED: | |
3986 | if (state != NULL) | |
3987 | nfs4_schedule_stateid_recovery(server, state); | |
3988 | case -NFS4ERR_STALE_STATEID: | |
3989 | case -NFS4ERR_STALE_CLIENTID: | |
3990 | nfs4_schedule_lease_recovery(clp); | |
3991 | goto wait_on_recovery; | |
3992 | #if defined(CONFIG_NFS_V4_1) | |
3993 | case -NFS4ERR_BADSESSION: | |
3994 | case -NFS4ERR_BADSLOT: | |
3995 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3996 | case -NFS4ERR_DEADSESSION: | |
3997 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3998 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3999 | case -NFS4ERR_SEQ_MISORDERED: | |
4000 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
4001 | task->tk_status); | |
4002 | nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); | |
4003 | task->tk_status = 0; | |
4004 | return -EAGAIN; | |
4005 | #endif /* CONFIG_NFS_V4_1 */ | |
4006 | case -NFS4ERR_DELAY: | |
4007 | nfs_inc_server_stats(server, NFSIOS_DELAY); | |
4008 | case -NFS4ERR_GRACE: | |
4009 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
4010 | task->tk_status = 0; | |
4011 | return -EAGAIN; | |
4012 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
4013 | case -NFS4ERR_OLD_STATEID: | |
4014 | task->tk_status = 0; | |
4015 | return -EAGAIN; | |
4016 | } | |
4017 | task->tk_status = nfs4_map_errors(task->tk_status); | |
4018 | return 0; | |
4019 | wait_on_recovery: | |
4020 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
4021 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
4022 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
4023 | task->tk_status = 0; | |
4024 | return -EAGAIN; | |
4025 | } | |
4026 | ||
4027 | static void nfs4_init_boot_verifier(const struct nfs_client *clp, | |
4028 | nfs4_verifier *bootverf) | |
4029 | { | |
4030 | __be32 verf[2]; | |
4031 | ||
4032 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { | |
4033 | /* An impossible timestamp guarantees this value | |
4034 | * will never match a generated boot time. */ | |
4035 | verf[0] = 0; | |
4036 | verf[1] = (__be32)(NSEC_PER_SEC + 1); | |
4037 | } else { | |
4038 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); | |
4039 | verf[0] = (__be32)nn->boot_time.tv_sec; | |
4040 | verf[1] = (__be32)nn->boot_time.tv_nsec; | |
4041 | } | |
4042 | memcpy(bootverf->data, verf, sizeof(bootverf->data)); | |
4043 | } | |
4044 | ||
4045 | static unsigned int | |
4046 | nfs4_init_nonuniform_client_string(const struct nfs_client *clp, | |
4047 | char *buf, size_t len) | |
4048 | { | |
4049 | unsigned int result; | |
4050 | ||
4051 | rcu_read_lock(); | |
4052 | result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s", | |
4053 | clp->cl_ipaddr, | |
4054 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4055 | RPC_DISPLAY_ADDR), | |
4056 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4057 | RPC_DISPLAY_PROTO)); | |
4058 | rcu_read_unlock(); | |
4059 | return result; | |
4060 | } | |
4061 | ||
4062 | static unsigned int | |
4063 | nfs4_init_uniform_client_string(const struct nfs_client *clp, | |
4064 | char *buf, size_t len) | |
4065 | { | |
4066 | char *nodename = clp->cl_rpcclient->cl_nodename; | |
4067 | ||
4068 | if (nfs4_client_id_uniquifier[0] != '\0') | |
4069 | nodename = nfs4_client_id_uniquifier; | |
4070 | return scnprintf(buf, len, "Linux NFSv%u.%u %s", | |
4071 | clp->rpc_ops->version, clp->cl_minorversion, | |
4072 | nodename); | |
4073 | } | |
4074 | ||
4075 | /** | |
4076 | * nfs4_proc_setclientid - Negotiate client ID | |
4077 | * @clp: state data structure | |
4078 | * @program: RPC program for NFSv4 callback service | |
4079 | * @port: IP port number for NFS4 callback service | |
4080 | * @cred: RPC credential to use for this call | |
4081 | * @res: where to place the result | |
4082 | * | |
4083 | * Returns zero, a negative errno, or a negative NFS4ERR status code. | |
4084 | */ | |
4085 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, | |
4086 | unsigned short port, struct rpc_cred *cred, | |
4087 | struct nfs4_setclientid_res *res) | |
4088 | { | |
4089 | nfs4_verifier sc_verifier; | |
4090 | struct nfs4_setclientid setclientid = { | |
4091 | .sc_verifier = &sc_verifier, | |
4092 | .sc_prog = program, | |
4093 | .sc_cb_ident = clp->cl_cb_ident, | |
4094 | }; | |
4095 | struct rpc_message msg = { | |
4096 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
4097 | .rpc_argp = &setclientid, | |
4098 | .rpc_resp = res, | |
4099 | .rpc_cred = cred, | |
4100 | }; | |
4101 | int status; | |
4102 | ||
4103 | /* nfs_client_id4 */ | |
4104 | nfs4_init_boot_verifier(clp, &sc_verifier); | |
4105 | if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) | |
4106 | setclientid.sc_name_len = | |
4107 | nfs4_init_uniform_client_string(clp, | |
4108 | setclientid.sc_name, | |
4109 | sizeof(setclientid.sc_name)); | |
4110 | else | |
4111 | setclientid.sc_name_len = | |
4112 | nfs4_init_nonuniform_client_string(clp, | |
4113 | setclientid.sc_name, | |
4114 | sizeof(setclientid.sc_name)); | |
4115 | /* cb_client4 */ | |
4116 | rcu_read_lock(); | |
4117 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
4118 | sizeof(setclientid.sc_netid), | |
4119 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4120 | RPC_DISPLAY_NETID)); | |
4121 | rcu_read_unlock(); | |
4122 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
4123 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", | |
4124 | clp->cl_ipaddr, port >> 8, port & 255); | |
4125 | ||
4126 | dprintk("NFS call setclientid auth=%s, '%.*s'\n", | |
4127 | clp->cl_rpcclient->cl_auth->au_ops->au_name, | |
4128 | setclientid.sc_name_len, setclientid.sc_name); | |
4129 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
4130 | dprintk("NFS reply setclientid: %d\n", status); | |
4131 | return status; | |
4132 | } | |
4133 | ||
4134 | /** | |
4135 | * nfs4_proc_setclientid_confirm - Confirm client ID | |
4136 | * @clp: state data structure | |
4137 | * @res: result of a previous SETCLIENTID | |
4138 | * @cred: RPC credential to use for this call | |
4139 | * | |
4140 | * Returns zero, a negative errno, or a negative NFS4ERR status code. | |
4141 | */ | |
4142 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, | |
4143 | struct nfs4_setclientid_res *arg, | |
4144 | struct rpc_cred *cred) | |
4145 | { | |
4146 | struct nfs_fsinfo fsinfo; | |
4147 | struct rpc_message msg = { | |
4148 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
4149 | .rpc_argp = arg, | |
4150 | .rpc_resp = &fsinfo, | |
4151 | .rpc_cred = cred, | |
4152 | }; | |
4153 | unsigned long now; | |
4154 | int status; | |
4155 | ||
4156 | dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", | |
4157 | clp->cl_rpcclient->cl_auth->au_ops->au_name, | |
4158 | clp->cl_clientid); | |
4159 | now = jiffies; | |
4160 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
4161 | if (status == 0) { | |
4162 | spin_lock(&clp->cl_lock); | |
4163 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
4164 | clp->cl_last_renewal = now; | |
4165 | spin_unlock(&clp->cl_lock); | |
4166 | } | |
4167 | dprintk("NFS reply setclientid_confirm: %d\n", status); | |
4168 | return status; | |
4169 | } | |
4170 | ||
4171 | struct nfs4_delegreturndata { | |
4172 | struct nfs4_delegreturnargs args; | |
4173 | struct nfs4_delegreturnres res; | |
4174 | struct nfs_fh fh; | |
4175 | nfs4_stateid stateid; | |
4176 | unsigned long timestamp; | |
4177 | struct nfs_fattr fattr; | |
4178 | int rpc_status; | |
4179 | }; | |
4180 | ||
4181 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) | |
4182 | { | |
4183 | struct nfs4_delegreturndata *data = calldata; | |
4184 | ||
4185 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
4186 | return; | |
4187 | ||
4188 | switch (task->tk_status) { | |
4189 | case -NFS4ERR_STALE_STATEID: | |
4190 | case -NFS4ERR_EXPIRED: | |
4191 | case 0: | |
4192 | renew_lease(data->res.server, data->timestamp); | |
4193 | break; | |
4194 | default: | |
4195 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
4196 | -EAGAIN) { | |
4197 | rpc_restart_call_prepare(task); | |
4198 | return; | |
4199 | } | |
4200 | } | |
4201 | data->rpc_status = task->tk_status; | |
4202 | } | |
4203 | ||
4204 | static void nfs4_delegreturn_release(void *calldata) | |
4205 | { | |
4206 | kfree(calldata); | |
4207 | } | |
4208 | ||
4209 | #if defined(CONFIG_NFS_V4_1) | |
4210 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
4211 | { | |
4212 | struct nfs4_delegreturndata *d_data; | |
4213 | ||
4214 | d_data = (struct nfs4_delegreturndata *)data; | |
4215 | ||
4216 | nfs4_setup_sequence(d_data->res.server, | |
4217 | &d_data->args.seq_args, | |
4218 | &d_data->res.seq_res, | |
4219 | task); | |
4220 | } | |
4221 | #endif /* CONFIG_NFS_V4_1 */ | |
4222 | ||
4223 | static const struct rpc_call_ops nfs4_delegreturn_ops = { | |
4224 | #if defined(CONFIG_NFS_V4_1) | |
4225 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
4226 | #endif /* CONFIG_NFS_V4_1 */ | |
4227 | .rpc_call_done = nfs4_delegreturn_done, | |
4228 | .rpc_release = nfs4_delegreturn_release, | |
4229 | }; | |
4230 | ||
4231 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
4232 | { | |
4233 | struct nfs4_delegreturndata *data; | |
4234 | struct nfs_server *server = NFS_SERVER(inode); | |
4235 | struct rpc_task *task; | |
4236 | struct rpc_message msg = { | |
4237 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
4238 | .rpc_cred = cred, | |
4239 | }; | |
4240 | struct rpc_task_setup task_setup_data = { | |
4241 | .rpc_client = server->client, | |
4242 | .rpc_message = &msg, | |
4243 | .callback_ops = &nfs4_delegreturn_ops, | |
4244 | .flags = RPC_TASK_ASYNC, | |
4245 | }; | |
4246 | int status = 0; | |
4247 | ||
4248 | data = kzalloc(sizeof(*data), GFP_NOFS); | |
4249 | if (data == NULL) | |
4250 | return -ENOMEM; | |
4251 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
4252 | data->args.fhandle = &data->fh; | |
4253 | data->args.stateid = &data->stateid; | |
4254 | data->args.bitmask = server->cache_consistency_bitmask; | |
4255 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
4256 | nfs4_stateid_copy(&data->stateid, stateid); | |
4257 | data->res.fattr = &data->fattr; | |
4258 | data->res.server = server; | |
4259 | nfs_fattr_init(data->res.fattr); | |
4260 | data->timestamp = jiffies; | |
4261 | data->rpc_status = 0; | |
4262 | ||
4263 | task_setup_data.callback_data = data; | |
4264 | msg.rpc_argp = &data->args; | |
4265 | msg.rpc_resp = &data->res; | |
4266 | task = rpc_run_task(&task_setup_data); | |
4267 | if (IS_ERR(task)) | |
4268 | return PTR_ERR(task); | |
4269 | if (!issync) | |
4270 | goto out; | |
4271 | status = nfs4_wait_for_completion_rpc_task(task); | |
4272 | if (status != 0) | |
4273 | goto out; | |
4274 | status = data->rpc_status; | |
4275 | if (status == 0) | |
4276 | nfs_post_op_update_inode_force_wcc(inode, &data->fattr); | |
4277 | else | |
4278 | nfs_refresh_inode(inode, &data->fattr); | |
4279 | out: | |
4280 | rpc_put_task(task); | |
4281 | return status; | |
4282 | } | |
4283 | ||
4284 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
4285 | { | |
4286 | struct nfs_server *server = NFS_SERVER(inode); | |
4287 | struct nfs4_exception exception = { }; | |
4288 | int err; | |
4289 | do { | |
4290 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); | |
4291 | switch (err) { | |
4292 | case -NFS4ERR_STALE_STATEID: | |
4293 | case -NFS4ERR_EXPIRED: | |
4294 | case 0: | |
4295 | return 0; | |
4296 | } | |
4297 | err = nfs4_handle_exception(server, err, &exception); | |
4298 | } while (exception.retry); | |
4299 | return err; | |
4300 | } | |
4301 | ||
4302 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
4303 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
4304 | ||
4305 | /* | |
4306 | * sleep, with exponential backoff, and retry the LOCK operation. | |
4307 | */ | |
4308 | static unsigned long | |
4309 | nfs4_set_lock_task_retry(unsigned long timeout) | |
4310 | { | |
4311 | freezable_schedule_timeout_killable(timeout); | |
4312 | timeout <<= 1; | |
4313 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
4314 | return NFS4_LOCK_MAXTIMEOUT; | |
4315 | return timeout; | |
4316 | } | |
4317 | ||
4318 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4319 | { | |
4320 | struct inode *inode = state->inode; | |
4321 | struct nfs_server *server = NFS_SERVER(inode); | |
4322 | struct nfs_client *clp = server->nfs_client; | |
4323 | struct nfs_lockt_args arg = { | |
4324 | .fh = NFS_FH(inode), | |
4325 | .fl = request, | |
4326 | }; | |
4327 | struct nfs_lockt_res res = { | |
4328 | .denied = request, | |
4329 | }; | |
4330 | struct rpc_message msg = { | |
4331 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
4332 | .rpc_argp = &arg, | |
4333 | .rpc_resp = &res, | |
4334 | .rpc_cred = state->owner->so_cred, | |
4335 | }; | |
4336 | struct nfs4_lock_state *lsp; | |
4337 | int status; | |
4338 | ||
4339 | arg.lock_owner.clientid = clp->cl_clientid; | |
4340 | status = nfs4_set_lock_state(state, request); | |
4341 | if (status != 0) | |
4342 | goto out; | |
4343 | lsp = request->fl_u.nfs4_fl.owner; | |
4344 | arg.lock_owner.id = lsp->ls_seqid.owner_id; | |
4345 | arg.lock_owner.s_dev = server->s_dev; | |
4346 | status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); | |
4347 | switch (status) { | |
4348 | case 0: | |
4349 | request->fl_type = F_UNLCK; | |
4350 | break; | |
4351 | case -NFS4ERR_DENIED: | |
4352 | status = 0; | |
4353 | } | |
4354 | request->fl_ops->fl_release_private(request); | |
4355 | out: | |
4356 | return status; | |
4357 | } | |
4358 | ||
4359 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4360 | { | |
4361 | struct nfs4_exception exception = { }; | |
4362 | int err; | |
4363 | ||
4364 | do { | |
4365 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
4366 | _nfs4_proc_getlk(state, cmd, request), | |
4367 | &exception); | |
4368 | } while (exception.retry); | |
4369 | return err; | |
4370 | } | |
4371 | ||
4372 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
4373 | { | |
4374 | int res = 0; | |
4375 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
4376 | case FL_POSIX: | |
4377 | res = posix_lock_file_wait(file, fl); | |
4378 | break; | |
4379 | case FL_FLOCK: | |
4380 | res = flock_lock_file_wait(file, fl); | |
4381 | break; | |
4382 | default: | |
4383 | BUG(); | |
4384 | } | |
4385 | return res; | |
4386 | } | |
4387 | ||
4388 | struct nfs4_unlockdata { | |
4389 | struct nfs_locku_args arg; | |
4390 | struct nfs_locku_res res; | |
4391 | struct nfs4_lock_state *lsp; | |
4392 | struct nfs_open_context *ctx; | |
4393 | struct file_lock fl; | |
4394 | const struct nfs_server *server; | |
4395 | unsigned long timestamp; | |
4396 | }; | |
4397 | ||
4398 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, | |
4399 | struct nfs_open_context *ctx, | |
4400 | struct nfs4_lock_state *lsp, | |
4401 | struct nfs_seqid *seqid) | |
4402 | { | |
4403 | struct nfs4_unlockdata *p; | |
4404 | struct inode *inode = lsp->ls_state->inode; | |
4405 | ||
4406 | p = kzalloc(sizeof(*p), GFP_NOFS); | |
4407 | if (p == NULL) | |
4408 | return NULL; | |
4409 | p->arg.fh = NFS_FH(inode); | |
4410 | p->arg.fl = &p->fl; | |
4411 | p->arg.seqid = seqid; | |
4412 | p->res.seqid = seqid; | |
4413 | p->arg.stateid = &lsp->ls_stateid; | |
4414 | p->lsp = lsp; | |
4415 | atomic_inc(&lsp->ls_count); | |
4416 | /* Ensure we don't close file until we're done freeing locks! */ | |
4417 | p->ctx = get_nfs_open_context(ctx); | |
4418 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4419 | p->server = NFS_SERVER(inode); | |
4420 | return p; | |
4421 | } | |
4422 | ||
4423 | static void nfs4_locku_release_calldata(void *data) | |
4424 | { | |
4425 | struct nfs4_unlockdata *calldata = data; | |
4426 | nfs_free_seqid(calldata->arg.seqid); | |
4427 | nfs4_put_lock_state(calldata->lsp); | |
4428 | put_nfs_open_context(calldata->ctx); | |
4429 | kfree(calldata); | |
4430 | } | |
4431 | ||
4432 | static void nfs4_locku_done(struct rpc_task *task, void *data) | |
4433 | { | |
4434 | struct nfs4_unlockdata *calldata = data; | |
4435 | ||
4436 | if (!nfs4_sequence_done(task, &calldata->res.seq_res)) | |
4437 | return; | |
4438 | switch (task->tk_status) { | |
4439 | case 0: | |
4440 | nfs4_stateid_copy(&calldata->lsp->ls_stateid, | |
4441 | &calldata->res.stateid); | |
4442 | renew_lease(calldata->server, calldata->timestamp); | |
4443 | break; | |
4444 | case -NFS4ERR_BAD_STATEID: | |
4445 | case -NFS4ERR_OLD_STATEID: | |
4446 | case -NFS4ERR_STALE_STATEID: | |
4447 | case -NFS4ERR_EXPIRED: | |
4448 | break; | |
4449 | default: | |
4450 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) | |
4451 | rpc_restart_call_prepare(task); | |
4452 | } | |
4453 | nfs_release_seqid(calldata->arg.seqid); | |
4454 | } | |
4455 | ||
4456 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) | |
4457 | { | |
4458 | struct nfs4_unlockdata *calldata = data; | |
4459 | ||
4460 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
4461 | goto out_wait; | |
4462 | if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { | |
4463 | /* Note: exit _without_ running nfs4_locku_done */ | |
4464 | goto out_no_action; | |
4465 | } | |
4466 | calldata->timestamp = jiffies; | |
4467 | if (nfs4_setup_sequence(calldata->server, | |
4468 | &calldata->arg.seq_args, | |
4469 | &calldata->res.seq_res, | |
4470 | task) != 0) | |
4471 | nfs_release_seqid(calldata->arg.seqid); | |
4472 | return; | |
4473 | out_no_action: | |
4474 | task->tk_action = NULL; | |
4475 | out_wait: | |
4476 | nfs4_sequence_done(task, &calldata->res.seq_res); | |
4477 | } | |
4478 | ||
4479 | static const struct rpc_call_ops nfs4_locku_ops = { | |
4480 | .rpc_call_prepare = nfs4_locku_prepare, | |
4481 | .rpc_call_done = nfs4_locku_done, | |
4482 | .rpc_release = nfs4_locku_release_calldata, | |
4483 | }; | |
4484 | ||
4485 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, | |
4486 | struct nfs_open_context *ctx, | |
4487 | struct nfs4_lock_state *lsp, | |
4488 | struct nfs_seqid *seqid) | |
4489 | { | |
4490 | struct nfs4_unlockdata *data; | |
4491 | struct rpc_message msg = { | |
4492 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
4493 | .rpc_cred = ctx->cred, | |
4494 | }; | |
4495 | struct rpc_task_setup task_setup_data = { | |
4496 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
4497 | .rpc_message = &msg, | |
4498 | .callback_ops = &nfs4_locku_ops, | |
4499 | .workqueue = nfsiod_workqueue, | |
4500 | .flags = RPC_TASK_ASYNC, | |
4501 | }; | |
4502 | ||
4503 | /* Ensure this is an unlock - when canceling a lock, the | |
4504 | * canceled lock is passed in, and it won't be an unlock. | |
4505 | */ | |
4506 | fl->fl_type = F_UNLCK; | |
4507 | ||
4508 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
4509 | if (data == NULL) { | |
4510 | nfs_free_seqid(seqid); | |
4511 | return ERR_PTR(-ENOMEM); | |
4512 | } | |
4513 | ||
4514 | nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); | |
4515 | msg.rpc_argp = &data->arg; | |
4516 | msg.rpc_resp = &data->res; | |
4517 | task_setup_data.callback_data = data; | |
4518 | return rpc_run_task(&task_setup_data); | |
4519 | } | |
4520 | ||
4521 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4522 | { | |
4523 | struct inode *inode = state->inode; | |
4524 | struct nfs4_state_owner *sp = state->owner; | |
4525 | struct nfs_inode *nfsi = NFS_I(inode); | |
4526 | struct nfs_seqid *seqid; | |
4527 | struct nfs4_lock_state *lsp; | |
4528 | struct rpc_task *task; | |
4529 | int status = 0; | |
4530 | unsigned char fl_flags = request->fl_flags; | |
4531 | ||
4532 | status = nfs4_set_lock_state(state, request); | |
4533 | /* Unlock _before_ we do the RPC call */ | |
4534 | request->fl_flags |= FL_EXISTS; | |
4535 | /* Exclude nfs_delegation_claim_locks() */ | |
4536 | mutex_lock(&sp->so_delegreturn_mutex); | |
4537 | /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ | |
4538 | down_read(&nfsi->rwsem); | |
4539 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
4540 | up_read(&nfsi->rwsem); | |
4541 | mutex_unlock(&sp->so_delegreturn_mutex); | |
4542 | goto out; | |
4543 | } | |
4544 | up_read(&nfsi->rwsem); | |
4545 | mutex_unlock(&sp->so_delegreturn_mutex); | |
4546 | if (status != 0) | |
4547 | goto out; | |
4548 | /* Is this a delegated lock? */ | |
4549 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
4550 | goto out; | |
4551 | lsp = request->fl_u.nfs4_fl.owner; | |
4552 | seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); | |
4553 | status = -ENOMEM; | |
4554 | if (seqid == NULL) | |
4555 | goto out; | |
4556 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); | |
4557 | status = PTR_ERR(task); | |
4558 | if (IS_ERR(task)) | |
4559 | goto out; | |
4560 | status = nfs4_wait_for_completion_rpc_task(task); | |
4561 | rpc_put_task(task); | |
4562 | out: | |
4563 | request->fl_flags = fl_flags; | |
4564 | return status; | |
4565 | } | |
4566 | ||
4567 | struct nfs4_lockdata { | |
4568 | struct nfs_lock_args arg; | |
4569 | struct nfs_lock_res res; | |
4570 | struct nfs4_lock_state *lsp; | |
4571 | struct nfs_open_context *ctx; | |
4572 | struct file_lock fl; | |
4573 | unsigned long timestamp; | |
4574 | int rpc_status; | |
4575 | int cancelled; | |
4576 | struct nfs_server *server; | |
4577 | }; | |
4578 | ||
4579 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
4580 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, | |
4581 | gfp_t gfp_mask) | |
4582 | { | |
4583 | struct nfs4_lockdata *p; | |
4584 | struct inode *inode = lsp->ls_state->inode; | |
4585 | struct nfs_server *server = NFS_SERVER(inode); | |
4586 | ||
4587 | p = kzalloc(sizeof(*p), gfp_mask); | |
4588 | if (p == NULL) | |
4589 | return NULL; | |
4590 | ||
4591 | p->arg.fh = NFS_FH(inode); | |
4592 | p->arg.fl = &p->fl; | |
4593 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); | |
4594 | if (p->arg.open_seqid == NULL) | |
4595 | goto out_free; | |
4596 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); | |
4597 | if (p->arg.lock_seqid == NULL) | |
4598 | goto out_free_seqid; | |
4599 | p->arg.lock_stateid = &lsp->ls_stateid; | |
4600 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; | |
4601 | p->arg.lock_owner.id = lsp->ls_seqid.owner_id; | |
4602 | p->arg.lock_owner.s_dev = server->s_dev; | |
4603 | p->res.lock_seqid = p->arg.lock_seqid; | |
4604 | p->lsp = lsp; | |
4605 | p->server = server; | |
4606 | atomic_inc(&lsp->ls_count); | |
4607 | p->ctx = get_nfs_open_context(ctx); | |
4608 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4609 | return p; | |
4610 | out_free_seqid: | |
4611 | nfs_free_seqid(p->arg.open_seqid); | |
4612 | out_free: | |
4613 | kfree(p); | |
4614 | return NULL; | |
4615 | } | |
4616 | ||
4617 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
4618 | { | |
4619 | struct nfs4_lockdata *data = calldata; | |
4620 | struct nfs4_state *state = data->lsp->ls_state; | |
4621 | ||
4622 | dprintk("%s: begin!\n", __func__); | |
4623 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) | |
4624 | goto out_wait; | |
4625 | /* Do we need to do an open_to_lock_owner? */ | |
4626 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
4627 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { | |
4628 | goto out_release_lock_seqid; | |
4629 | } | |
4630 | data->arg.open_stateid = &state->stateid; | |
4631 | data->arg.new_lock_owner = 1; | |
4632 | data->res.open_seqid = data->arg.open_seqid; | |
4633 | } else | |
4634 | data->arg.new_lock_owner = 0; | |
4635 | data->timestamp = jiffies; | |
4636 | if (nfs4_setup_sequence(data->server, | |
4637 | &data->arg.seq_args, | |
4638 | &data->res.seq_res, | |
4639 | task) == 0) | |
4640 | return; | |
4641 | nfs_release_seqid(data->arg.open_seqid); | |
4642 | out_release_lock_seqid: | |
4643 | nfs_release_seqid(data->arg.lock_seqid); | |
4644 | out_wait: | |
4645 | nfs4_sequence_done(task, &data->res.seq_res); | |
4646 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); | |
4647 | } | |
4648 | ||
4649 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
4650 | { | |
4651 | struct nfs4_lockdata *data = calldata; | |
4652 | ||
4653 | dprintk("%s: begin!\n", __func__); | |
4654 | ||
4655 | if (!nfs4_sequence_done(task, &data->res.seq_res)) | |
4656 | return; | |
4657 | ||
4658 | data->rpc_status = task->tk_status; | |
4659 | if (data->arg.new_lock_owner != 0) { | |
4660 | if (data->rpc_status == 0) | |
4661 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4662 | else | |
4663 | goto out; | |
4664 | } | |
4665 | if (data->rpc_status == 0) { | |
4666 | nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); | |
4667 | set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags); | |
4668 | renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); | |
4669 | } | |
4670 | out: | |
4671 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); | |
4672 | } | |
4673 | ||
4674 | static void nfs4_lock_release(void *calldata) | |
4675 | { | |
4676 | struct nfs4_lockdata *data = calldata; | |
4677 | ||
4678 | dprintk("%s: begin!\n", __func__); | |
4679 | nfs_free_seqid(data->arg.open_seqid); | |
4680 | if (data->cancelled != 0) { | |
4681 | struct rpc_task *task; | |
4682 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4683 | data->arg.lock_seqid); | |
4684 | if (!IS_ERR(task)) | |
4685 | rpc_put_task_async(task); | |
4686 | dprintk("%s: cancelling lock!\n", __func__); | |
4687 | } else | |
4688 | nfs_free_seqid(data->arg.lock_seqid); | |
4689 | nfs4_put_lock_state(data->lsp); | |
4690 | put_nfs_open_context(data->ctx); | |
4691 | kfree(data); | |
4692 | dprintk("%s: done!\n", __func__); | |
4693 | } | |
4694 | ||
4695 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4696 | .rpc_call_prepare = nfs4_lock_prepare, | |
4697 | .rpc_call_done = nfs4_lock_done, | |
4698 | .rpc_release = nfs4_lock_release, | |
4699 | }; | |
4700 | ||
4701 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) | |
4702 | { | |
4703 | switch (error) { | |
4704 | case -NFS4ERR_ADMIN_REVOKED: | |
4705 | case -NFS4ERR_BAD_STATEID: | |
4706 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
4707 | if (new_lock_owner != 0 || | |
4708 | test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) | |
4709 | nfs4_schedule_stateid_recovery(server, lsp->ls_state); | |
4710 | break; | |
4711 | case -NFS4ERR_STALE_STATEID: | |
4712 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
4713 | case -NFS4ERR_EXPIRED: | |
4714 | nfs4_schedule_lease_recovery(server->nfs_client); | |
4715 | }; | |
4716 | } | |
4717 | ||
4718 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) | |
4719 | { | |
4720 | struct nfs4_lockdata *data; | |
4721 | struct rpc_task *task; | |
4722 | struct rpc_message msg = { | |
4723 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4724 | .rpc_cred = state->owner->so_cred, | |
4725 | }; | |
4726 | struct rpc_task_setup task_setup_data = { | |
4727 | .rpc_client = NFS_CLIENT(state->inode), | |
4728 | .rpc_message = &msg, | |
4729 | .callback_ops = &nfs4_lock_ops, | |
4730 | .workqueue = nfsiod_workqueue, | |
4731 | .flags = RPC_TASK_ASYNC, | |
4732 | }; | |
4733 | int ret; | |
4734 | ||
4735 | dprintk("%s: begin!\n", __func__); | |
4736 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), | |
4737 | fl->fl_u.nfs4_fl.owner, | |
4738 | recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); | |
4739 | if (data == NULL) | |
4740 | return -ENOMEM; | |
4741 | if (IS_SETLKW(cmd)) | |
4742 | data->arg.block = 1; | |
4743 | nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); | |
4744 | msg.rpc_argp = &data->arg; | |
4745 | msg.rpc_resp = &data->res; | |
4746 | task_setup_data.callback_data = data; | |
4747 | if (recovery_type > NFS_LOCK_NEW) { | |
4748 | if (recovery_type == NFS_LOCK_RECLAIM) | |
4749 | data->arg.reclaim = NFS_LOCK_RECLAIM; | |
4750 | nfs4_set_sequence_privileged(&data->arg.seq_args); | |
4751 | } | |
4752 | task = rpc_run_task(&task_setup_data); | |
4753 | if (IS_ERR(task)) | |
4754 | return PTR_ERR(task); | |
4755 | ret = nfs4_wait_for_completion_rpc_task(task); | |
4756 | if (ret == 0) { | |
4757 | ret = data->rpc_status; | |
4758 | if (ret) | |
4759 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4760 | data->arg.new_lock_owner, ret); | |
4761 | } else | |
4762 | data->cancelled = 1; | |
4763 | rpc_put_task(task); | |
4764 | dprintk("%s: done, ret = %d!\n", __func__, ret); | |
4765 | return ret; | |
4766 | } | |
4767 | ||
4768 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4769 | { | |
4770 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4771 | struct nfs4_exception exception = { | |
4772 | .inode = state->inode, | |
4773 | }; | |
4774 | int err; | |
4775 | ||
4776 | do { | |
4777 | /* Cache the lock if possible... */ | |
4778 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4779 | return 0; | |
4780 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); | |
4781 | if (err != -NFS4ERR_DELAY) | |
4782 | break; | |
4783 | nfs4_handle_exception(server, err, &exception); | |
4784 | } while (exception.retry); | |
4785 | return err; | |
4786 | } | |
4787 | ||
4788 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4789 | { | |
4790 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4791 | struct nfs4_exception exception = { | |
4792 | .inode = state->inode, | |
4793 | }; | |
4794 | int err; | |
4795 | ||
4796 | err = nfs4_set_lock_state(state, request); | |
4797 | if (err != 0) | |
4798 | return err; | |
4799 | do { | |
4800 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4801 | return 0; | |
4802 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); | |
4803 | switch (err) { | |
4804 | default: | |
4805 | goto out; | |
4806 | case -NFS4ERR_GRACE: | |
4807 | case -NFS4ERR_DELAY: | |
4808 | nfs4_handle_exception(server, err, &exception); | |
4809 | err = 0; | |
4810 | } | |
4811 | } while (exception.retry); | |
4812 | out: | |
4813 | return err; | |
4814 | } | |
4815 | ||
4816 | #if defined(CONFIG_NFS_V4_1) | |
4817 | /** | |
4818 | * nfs41_check_expired_locks - possibly free a lock stateid | |
4819 | * | |
4820 | * @state: NFSv4 state for an inode | |
4821 | * | |
4822 | * Returns NFS_OK if recovery for this stateid is now finished. | |
4823 | * Otherwise a negative NFS4ERR value is returned. | |
4824 | */ | |
4825 | static int nfs41_check_expired_locks(struct nfs4_state *state) | |
4826 | { | |
4827 | int status, ret = -NFS4ERR_BAD_STATEID; | |
4828 | struct nfs4_lock_state *lsp; | |
4829 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4830 | ||
4831 | list_for_each_entry(lsp, &state->lock_states, ls_locks) { | |
4832 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
4833 | status = nfs41_test_stateid(server, &lsp->ls_stateid); | |
4834 | if (status != NFS_OK) { | |
4835 | /* Free the stateid unless the server | |
4836 | * informs us the stateid is unrecognized. */ | |
4837 | if (status != -NFS4ERR_BAD_STATEID) | |
4838 | nfs41_free_stateid(server, | |
4839 | &lsp->ls_stateid); | |
4840 | clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); | |
4841 | ret = status; | |
4842 | } | |
4843 | } | |
4844 | }; | |
4845 | ||
4846 | return ret; | |
4847 | } | |
4848 | ||
4849 | static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4850 | { | |
4851 | int status = NFS_OK; | |
4852 | ||
4853 | if (test_bit(LK_STATE_IN_USE, &state->flags)) | |
4854 | status = nfs41_check_expired_locks(state); | |
4855 | if (status != NFS_OK) | |
4856 | status = nfs4_lock_expired(state, request); | |
4857 | return status; | |
4858 | } | |
4859 | #endif | |
4860 | ||
4861 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4862 | { | |
4863 | struct nfs4_state_owner *sp = state->owner; | |
4864 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
4865 | unsigned char fl_flags = request->fl_flags; | |
4866 | unsigned int seq; | |
4867 | int status = -ENOLCK; | |
4868 | ||
4869 | if ((fl_flags & FL_POSIX) && | |
4870 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4871 | goto out; | |
4872 | /* Is this a delegated open? */ | |
4873 | status = nfs4_set_lock_state(state, request); | |
4874 | if (status != 0) | |
4875 | goto out; | |
4876 | request->fl_flags |= FL_ACCESS; | |
4877 | status = do_vfs_lock(request->fl_file, request); | |
4878 | if (status < 0) | |
4879 | goto out; | |
4880 | down_read(&nfsi->rwsem); | |
4881 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
4882 | /* Yes: cache locks! */ | |
4883 | /* ...but avoid races with delegation recall... */ | |
4884 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
4885 | status = do_vfs_lock(request->fl_file, request); | |
4886 | goto out_unlock; | |
4887 | } | |
4888 | seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); | |
4889 | up_read(&nfsi->rwsem); | |
4890 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); | |
4891 | if (status != 0) | |
4892 | goto out; | |
4893 | down_read(&nfsi->rwsem); | |
4894 | if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) { | |
4895 | status = -NFS4ERR_DELAY; | |
4896 | goto out_unlock; | |
4897 | } | |
4898 | /* Note: we always want to sleep here! */ | |
4899 | request->fl_flags = fl_flags | FL_SLEEP; | |
4900 | if (do_vfs_lock(request->fl_file, request) < 0) | |
4901 | printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " | |
4902 | "manager!\n", __func__); | |
4903 | out_unlock: | |
4904 | up_read(&nfsi->rwsem); | |
4905 | out: | |
4906 | request->fl_flags = fl_flags; | |
4907 | return status; | |
4908 | } | |
4909 | ||
4910 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4911 | { | |
4912 | struct nfs4_exception exception = { | |
4913 | .state = state, | |
4914 | .inode = state->inode, | |
4915 | }; | |
4916 | int err; | |
4917 | ||
4918 | do { | |
4919 | err = _nfs4_proc_setlk(state, cmd, request); | |
4920 | if (err == -NFS4ERR_DENIED) | |
4921 | err = -EAGAIN; | |
4922 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
4923 | err, &exception); | |
4924 | } while (exception.retry); | |
4925 | return err; | |
4926 | } | |
4927 | ||
4928 | static int | |
4929 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4930 | { | |
4931 | struct nfs_open_context *ctx; | |
4932 | struct nfs4_state *state; | |
4933 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4934 | int status; | |
4935 | ||
4936 | /* verify open state */ | |
4937 | ctx = nfs_file_open_context(filp); | |
4938 | state = ctx->state; | |
4939 | ||
4940 | if (request->fl_start < 0 || request->fl_end < 0) | |
4941 | return -EINVAL; | |
4942 | ||
4943 | if (IS_GETLK(cmd)) { | |
4944 | if (state != NULL) | |
4945 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4946 | return 0; | |
4947 | } | |
4948 | ||
4949 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4950 | return -EINVAL; | |
4951 | ||
4952 | if (request->fl_type == F_UNLCK) { | |
4953 | if (state != NULL) | |
4954 | return nfs4_proc_unlck(state, cmd, request); | |
4955 | return 0; | |
4956 | } | |
4957 | ||
4958 | if (state == NULL) | |
4959 | return -ENOLCK; | |
4960 | /* | |
4961 | * Don't rely on the VFS having checked the file open mode, | |
4962 | * since it won't do this for flock() locks. | |
4963 | */ | |
4964 | switch (request->fl_type) { | |
4965 | case F_RDLCK: | |
4966 | if (!(filp->f_mode & FMODE_READ)) | |
4967 | return -EBADF; | |
4968 | break; | |
4969 | case F_WRLCK: | |
4970 | if (!(filp->f_mode & FMODE_WRITE)) | |
4971 | return -EBADF; | |
4972 | } | |
4973 | ||
4974 | do { | |
4975 | status = nfs4_proc_setlk(state, cmd, request); | |
4976 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4977 | break; | |
4978 | timeout = nfs4_set_lock_task_retry(timeout); | |
4979 | status = -ERESTARTSYS; | |
4980 | if (signalled()) | |
4981 | break; | |
4982 | } while(status < 0); | |
4983 | return status; | |
4984 | } | |
4985 | ||
4986 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) | |
4987 | { | |
4988 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4989 | struct nfs4_exception exception = { }; | |
4990 | int err; | |
4991 | ||
4992 | err = nfs4_set_lock_state(state, fl); | |
4993 | if (err != 0) | |
4994 | goto out; | |
4995 | do { | |
4996 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); | |
4997 | switch (err) { | |
4998 | default: | |
4999 | printk(KERN_ERR "NFS: %s: unhandled error " | |
5000 | "%d.\n", __func__, err); | |
5001 | case 0: | |
5002 | case -ESTALE: | |
5003 | goto out; | |
5004 | case -NFS4ERR_STALE_CLIENTID: | |
5005 | case -NFS4ERR_STALE_STATEID: | |
5006 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
5007 | case -NFS4ERR_EXPIRED: | |
5008 | nfs4_schedule_lease_recovery(server->nfs_client); | |
5009 | err = -EAGAIN; | |
5010 | goto out; | |
5011 | case -NFS4ERR_BADSESSION: | |
5012 | case -NFS4ERR_BADSLOT: | |
5013 | case -NFS4ERR_BAD_HIGH_SLOT: | |
5014 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
5015 | case -NFS4ERR_DEADSESSION: | |
5016 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
5017 | nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); | |
5018 | err = -EAGAIN; | |
5019 | goto out; | |
5020 | case -NFS4ERR_DELEG_REVOKED: | |
5021 | case -NFS4ERR_ADMIN_REVOKED: | |
5022 | case -NFS4ERR_BAD_STATEID: | |
5023 | case -NFS4ERR_OPENMODE: | |
5024 | nfs4_schedule_stateid_recovery(server, state); | |
5025 | err = 0; | |
5026 | goto out; | |
5027 | case -ENOMEM: | |
5028 | case -NFS4ERR_DENIED: | |
5029 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
5030 | err = 0; | |
5031 | goto out; | |
5032 | } | |
5033 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
5034 | err = nfs4_handle_exception(server, err, &exception); | |
5035 | } while (exception.retry); | |
5036 | out: | |
5037 | return err; | |
5038 | } | |
5039 | ||
5040 | struct nfs_release_lockowner_data { | |
5041 | struct nfs4_lock_state *lsp; | |
5042 | struct nfs_server *server; | |
5043 | struct nfs_release_lockowner_args args; | |
5044 | }; | |
5045 | ||
5046 | static void nfs4_release_lockowner_release(void *calldata) | |
5047 | { | |
5048 | struct nfs_release_lockowner_data *data = calldata; | |
5049 | nfs4_free_lock_state(data->server, data->lsp); | |
5050 | kfree(calldata); | |
5051 | } | |
5052 | ||
5053 | static const struct rpc_call_ops nfs4_release_lockowner_ops = { | |
5054 | .rpc_release = nfs4_release_lockowner_release, | |
5055 | }; | |
5056 | ||
5057 | int nfs4_release_lockowner(struct nfs4_lock_state *lsp) | |
5058 | { | |
5059 | struct nfs_server *server = lsp->ls_state->owner->so_server; | |
5060 | struct nfs_release_lockowner_data *data; | |
5061 | struct rpc_message msg = { | |
5062 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], | |
5063 | }; | |
5064 | ||
5065 | if (server->nfs_client->cl_mvops->minor_version != 0) | |
5066 | return -EINVAL; | |
5067 | data = kmalloc(sizeof(*data), GFP_NOFS); | |
5068 | if (!data) | |
5069 | return -ENOMEM; | |
5070 | data->lsp = lsp; | |
5071 | data->server = server; | |
5072 | data->args.lock_owner.clientid = server->nfs_client->cl_clientid; | |
5073 | data->args.lock_owner.id = lsp->ls_seqid.owner_id; | |
5074 | data->args.lock_owner.s_dev = server->s_dev; | |
5075 | msg.rpc_argp = &data->args; | |
5076 | rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); | |
5077 | return 0; | |
5078 | } | |
5079 | ||
5080 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" | |
5081 | ||
5082 | static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, | |
5083 | const void *buf, size_t buflen, | |
5084 | int flags, int type) | |
5085 | { | |
5086 | if (strcmp(key, "") != 0) | |
5087 | return -EINVAL; | |
5088 | ||
5089 | return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); | |
5090 | } | |
5091 | ||
5092 | static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, | |
5093 | void *buf, size_t buflen, int type) | |
5094 | { | |
5095 | if (strcmp(key, "") != 0) | |
5096 | return -EINVAL; | |
5097 | ||
5098 | return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); | |
5099 | } | |
5100 | ||
5101 | static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, | |
5102 | size_t list_len, const char *name, | |
5103 | size_t name_len, int type) | |
5104 | { | |
5105 | size_t len = sizeof(XATTR_NAME_NFSV4_ACL); | |
5106 | ||
5107 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) | |
5108 | return 0; | |
5109 | ||
5110 | if (list && len <= list_len) | |
5111 | memcpy(list, XATTR_NAME_NFSV4_ACL, len); | |
5112 | return len; | |
5113 | } | |
5114 | ||
5115 | /* | |
5116 | * nfs_fhget will use either the mounted_on_fileid or the fileid | |
5117 | */ | |
5118 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) | |
5119 | { | |
5120 | if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || | |
5121 | (fattr->valid & NFS_ATTR_FATTR_FILEID)) && | |
5122 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
5123 | (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) | |
5124 | return; | |
5125 | ||
5126 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
5127 | NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; | |
5128 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
5129 | fattr->nlink = 2; | |
5130 | } | |
5131 | ||
5132 | static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, | |
5133 | const struct qstr *name, | |
5134 | struct nfs4_fs_locations *fs_locations, | |
5135 | struct page *page) | |
5136 | { | |
5137 | struct nfs_server *server = NFS_SERVER(dir); | |
5138 | u32 bitmask[2] = { | |
5139 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, | |
5140 | }; | |
5141 | struct nfs4_fs_locations_arg args = { | |
5142 | .dir_fh = NFS_FH(dir), | |
5143 | .name = name, | |
5144 | .page = page, | |
5145 | .bitmask = bitmask, | |
5146 | }; | |
5147 | struct nfs4_fs_locations_res res = { | |
5148 | .fs_locations = fs_locations, | |
5149 | }; | |
5150 | struct rpc_message msg = { | |
5151 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
5152 | .rpc_argp = &args, | |
5153 | .rpc_resp = &res, | |
5154 | }; | |
5155 | int status; | |
5156 | ||
5157 | dprintk("%s: start\n", __func__); | |
5158 | ||
5159 | /* Ask for the fileid of the absent filesystem if mounted_on_fileid | |
5160 | * is not supported */ | |
5161 | if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) | |
5162 | bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; | |
5163 | else | |
5164 | bitmask[0] |= FATTR4_WORD0_FILEID; | |
5165 | ||
5166 | nfs_fattr_init(&fs_locations->fattr); | |
5167 | fs_locations->server = server; | |
5168 | fs_locations->nlocations = 0; | |
5169 | status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
5170 | dprintk("%s: returned status = %d\n", __func__, status); | |
5171 | return status; | |
5172 | } | |
5173 | ||
5174 | int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, | |
5175 | const struct qstr *name, | |
5176 | struct nfs4_fs_locations *fs_locations, | |
5177 | struct page *page) | |
5178 | { | |
5179 | struct nfs4_exception exception = { }; | |
5180 | int err; | |
5181 | do { | |
5182 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
5183 | _nfs4_proc_fs_locations(client, dir, name, fs_locations, page), | |
5184 | &exception); | |
5185 | } while (exception.retry); | |
5186 | return err; | |
5187 | } | |
5188 | ||
5189 | static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors) | |
5190 | { | |
5191 | int status; | |
5192 | struct nfs4_secinfo_arg args = { | |
5193 | .dir_fh = NFS_FH(dir), | |
5194 | .name = name, | |
5195 | }; | |
5196 | struct nfs4_secinfo_res res = { | |
5197 | .flavors = flavors, | |
5198 | }; | |
5199 | struct rpc_message msg = { | |
5200 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], | |
5201 | .rpc_argp = &args, | |
5202 | .rpc_resp = &res, | |
5203 | }; | |
5204 | ||
5205 | dprintk("NFS call secinfo %s\n", name->name); | |
5206 | status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); | |
5207 | dprintk("NFS reply secinfo: %d\n", status); | |
5208 | return status; | |
5209 | } | |
5210 | ||
5211 | int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, | |
5212 | struct nfs4_secinfo_flavors *flavors) | |
5213 | { | |
5214 | struct nfs4_exception exception = { }; | |
5215 | int err; | |
5216 | do { | |
5217 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
5218 | _nfs4_proc_secinfo(dir, name, flavors), | |
5219 | &exception); | |
5220 | } while (exception.retry); | |
5221 | return err; | |
5222 | } | |
5223 | ||
5224 | #ifdef CONFIG_NFS_V4_1 | |
5225 | /* | |
5226 | * Check the exchange flags returned by the server for invalid flags, having | |
5227 | * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or | |
5228 | * DS flags set. | |
5229 | */ | |
5230 | static int nfs4_check_cl_exchange_flags(u32 flags) | |
5231 | { | |
5232 | if (flags & ~EXCHGID4_FLAG_MASK_R) | |
5233 | goto out_inval; | |
5234 | if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && | |
5235 | (flags & EXCHGID4_FLAG_USE_NON_PNFS)) | |
5236 | goto out_inval; | |
5237 | if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) | |
5238 | goto out_inval; | |
5239 | return NFS_OK; | |
5240 | out_inval: | |
5241 | return -NFS4ERR_INVAL; | |
5242 | } | |
5243 | ||
5244 | static bool | |
5245 | nfs41_same_server_scope(struct nfs41_server_scope *a, | |
5246 | struct nfs41_server_scope *b) | |
5247 | { | |
5248 | if (a->server_scope_sz == b->server_scope_sz && | |
5249 | memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) | |
5250 | return true; | |
5251 | ||
5252 | return false; | |
5253 | } | |
5254 | ||
5255 | /* | |
5256 | * nfs4_proc_bind_conn_to_session() | |
5257 | * | |
5258 | * The 4.1 client currently uses the same TCP connection for the | |
5259 | * fore and backchannel. | |
5260 | */ | |
5261 | int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) | |
5262 | { | |
5263 | int status; | |
5264 | struct nfs41_bind_conn_to_session_res res; | |
5265 | struct rpc_message msg = { | |
5266 | .rpc_proc = | |
5267 | &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], | |
5268 | .rpc_argp = clp, | |
5269 | .rpc_resp = &res, | |
5270 | .rpc_cred = cred, | |
5271 | }; | |
5272 | ||
5273 | dprintk("--> %s\n", __func__); | |
5274 | ||
5275 | res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); | |
5276 | if (unlikely(res.session == NULL)) { | |
5277 | status = -ENOMEM; | |
5278 | goto out; | |
5279 | } | |
5280 | ||
5281 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5282 | if (status == 0) { | |
5283 | if (memcmp(res.session->sess_id.data, | |
5284 | clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { | |
5285 | dprintk("NFS: %s: Session ID mismatch\n", __func__); | |
5286 | status = -EIO; | |
5287 | goto out_session; | |
5288 | } | |
5289 | if (res.dir != NFS4_CDFS4_BOTH) { | |
5290 | dprintk("NFS: %s: Unexpected direction from server\n", | |
5291 | __func__); | |
5292 | status = -EIO; | |
5293 | goto out_session; | |
5294 | } | |
5295 | if (res.use_conn_in_rdma_mode) { | |
5296 | dprintk("NFS: %s: Server returned RDMA mode = true\n", | |
5297 | __func__); | |
5298 | status = -EIO; | |
5299 | goto out_session; | |
5300 | } | |
5301 | } | |
5302 | out_session: | |
5303 | kfree(res.session); | |
5304 | out: | |
5305 | dprintk("<-- %s status= %d\n", __func__, status); | |
5306 | return status; | |
5307 | } | |
5308 | ||
5309 | /* | |
5310 | * nfs4_proc_exchange_id() | |
5311 | * | |
5312 | * Returns zero, a negative errno, or a negative NFS4ERR status code. | |
5313 | * | |
5314 | * Since the clientid has expired, all compounds using sessions | |
5315 | * associated with the stale clientid will be returning | |
5316 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
5317 | * be in some phase of session reset. | |
5318 | */ | |
5319 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) | |
5320 | { | |
5321 | nfs4_verifier verifier; | |
5322 | struct nfs41_exchange_id_args args = { | |
5323 | .verifier = &verifier, | |
5324 | .client = clp, | |
5325 | .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER, | |
5326 | }; | |
5327 | struct nfs41_exchange_id_res res = { | |
5328 | 0 | |
5329 | }; | |
5330 | int status; | |
5331 | struct rpc_message msg = { | |
5332 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
5333 | .rpc_argp = &args, | |
5334 | .rpc_resp = &res, | |
5335 | .rpc_cred = cred, | |
5336 | }; | |
5337 | ||
5338 | nfs4_init_boot_verifier(clp, &verifier); | |
5339 | args.id_len = nfs4_init_uniform_client_string(clp, args.id, | |
5340 | sizeof(args.id)); | |
5341 | dprintk("NFS call exchange_id auth=%s, '%.*s'\n", | |
5342 | clp->cl_rpcclient->cl_auth->au_ops->au_name, | |
5343 | args.id_len, args.id); | |
5344 | ||
5345 | res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), | |
5346 | GFP_NOFS); | |
5347 | if (unlikely(res.server_owner == NULL)) { | |
5348 | status = -ENOMEM; | |
5349 | goto out; | |
5350 | } | |
5351 | ||
5352 | res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), | |
5353 | GFP_NOFS); | |
5354 | if (unlikely(res.server_scope == NULL)) { | |
5355 | status = -ENOMEM; | |
5356 | goto out_server_owner; | |
5357 | } | |
5358 | ||
5359 | res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); | |
5360 | if (unlikely(res.impl_id == NULL)) { | |
5361 | status = -ENOMEM; | |
5362 | goto out_server_scope; | |
5363 | } | |
5364 | ||
5365 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5366 | if (status == 0) | |
5367 | status = nfs4_check_cl_exchange_flags(res.flags); | |
5368 | ||
5369 | if (status == 0) { | |
5370 | clp->cl_clientid = res.clientid; | |
5371 | clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R); | |
5372 | if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) | |
5373 | clp->cl_seqid = res.seqid; | |
5374 | ||
5375 | kfree(clp->cl_serverowner); | |
5376 | clp->cl_serverowner = res.server_owner; | |
5377 | res.server_owner = NULL; | |
5378 | ||
5379 | /* use the most recent implementation id */ | |
5380 | kfree(clp->cl_implid); | |
5381 | clp->cl_implid = res.impl_id; | |
5382 | ||
5383 | if (clp->cl_serverscope != NULL && | |
5384 | !nfs41_same_server_scope(clp->cl_serverscope, | |
5385 | res.server_scope)) { | |
5386 | dprintk("%s: server_scope mismatch detected\n", | |
5387 | __func__); | |
5388 | set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); | |
5389 | kfree(clp->cl_serverscope); | |
5390 | clp->cl_serverscope = NULL; | |
5391 | } | |
5392 | ||
5393 | if (clp->cl_serverscope == NULL) { | |
5394 | clp->cl_serverscope = res.server_scope; | |
5395 | goto out; | |
5396 | } | |
5397 | } else | |
5398 | kfree(res.impl_id); | |
5399 | ||
5400 | out_server_owner: | |
5401 | kfree(res.server_owner); | |
5402 | out_server_scope: | |
5403 | kfree(res.server_scope); | |
5404 | out: | |
5405 | if (clp->cl_implid != NULL) | |
5406 | dprintk("NFS reply exchange_id: Server Implementation ID: " | |
5407 | "domain: %s, name: %s, date: %llu,%u\n", | |
5408 | clp->cl_implid->domain, clp->cl_implid->name, | |
5409 | clp->cl_implid->date.seconds, | |
5410 | clp->cl_implid->date.nseconds); | |
5411 | dprintk("NFS reply exchange_id: %d\n", status); | |
5412 | return status; | |
5413 | } | |
5414 | ||
5415 | static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, | |
5416 | struct rpc_cred *cred) | |
5417 | { | |
5418 | struct rpc_message msg = { | |
5419 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], | |
5420 | .rpc_argp = clp, | |
5421 | .rpc_cred = cred, | |
5422 | }; | |
5423 | int status; | |
5424 | ||
5425 | status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5426 | if (status) | |
5427 | dprintk("NFS: Got error %d from the server %s on " | |
5428 | "DESTROY_CLIENTID.", status, clp->cl_hostname); | |
5429 | return status; | |
5430 | } | |
5431 | ||
5432 | static int nfs4_proc_destroy_clientid(struct nfs_client *clp, | |
5433 | struct rpc_cred *cred) | |
5434 | { | |
5435 | unsigned int loop; | |
5436 | int ret; | |
5437 | ||
5438 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
5439 | ret = _nfs4_proc_destroy_clientid(clp, cred); | |
5440 | switch (ret) { | |
5441 | case -NFS4ERR_DELAY: | |
5442 | case -NFS4ERR_CLIENTID_BUSY: | |
5443 | ssleep(1); | |
5444 | break; | |
5445 | default: | |
5446 | return ret; | |
5447 | } | |
5448 | } | |
5449 | return 0; | |
5450 | } | |
5451 | ||
5452 | int nfs4_destroy_clientid(struct nfs_client *clp) | |
5453 | { | |
5454 | struct rpc_cred *cred; | |
5455 | int ret = 0; | |
5456 | ||
5457 | if (clp->cl_mvops->minor_version < 1) | |
5458 | goto out; | |
5459 | if (clp->cl_exchange_flags == 0) | |
5460 | goto out; | |
5461 | if (clp->cl_preserve_clid) | |
5462 | goto out; | |
5463 | cred = nfs4_get_exchange_id_cred(clp); | |
5464 | ret = nfs4_proc_destroy_clientid(clp, cred); | |
5465 | if (cred) | |
5466 | put_rpccred(cred); | |
5467 | switch (ret) { | |
5468 | case 0: | |
5469 | case -NFS4ERR_STALE_CLIENTID: | |
5470 | clp->cl_exchange_flags = 0; | |
5471 | } | |
5472 | out: | |
5473 | return ret; | |
5474 | } | |
5475 | ||
5476 | struct nfs4_get_lease_time_data { | |
5477 | struct nfs4_get_lease_time_args *args; | |
5478 | struct nfs4_get_lease_time_res *res; | |
5479 | struct nfs_client *clp; | |
5480 | }; | |
5481 | ||
5482 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
5483 | void *calldata) | |
5484 | { | |
5485 | struct nfs4_get_lease_time_data *data = | |
5486 | (struct nfs4_get_lease_time_data *)calldata; | |
5487 | ||
5488 | dprintk("--> %s\n", __func__); | |
5489 | /* just setup sequence, do not trigger session recovery | |
5490 | since we're invoked within one */ | |
5491 | nfs41_setup_sequence(data->clp->cl_session, | |
5492 | &data->args->la_seq_args, | |
5493 | &data->res->lr_seq_res, | |
5494 | task); | |
5495 | dprintk("<-- %s\n", __func__); | |
5496 | } | |
5497 | ||
5498 | /* | |
5499 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
5500 | * from sequence operation or clientid errors. | |
5501 | */ | |
5502 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
5503 | { | |
5504 | struct nfs4_get_lease_time_data *data = | |
5505 | (struct nfs4_get_lease_time_data *)calldata; | |
5506 | ||
5507 | dprintk("--> %s\n", __func__); | |
5508 | if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) | |
5509 | return; | |
5510 | switch (task->tk_status) { | |
5511 | case -NFS4ERR_DELAY: | |
5512 | case -NFS4ERR_GRACE: | |
5513 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
5514 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
5515 | task->tk_status = 0; | |
5516 | /* fall through */ | |
5517 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
5518 | rpc_restart_call_prepare(task); | |
5519 | return; | |
5520 | } | |
5521 | dprintk("<-- %s\n", __func__); | |
5522 | } | |
5523 | ||
5524 | static const struct rpc_call_ops nfs4_get_lease_time_ops = { | |
5525 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
5526 | .rpc_call_done = nfs4_get_lease_time_done, | |
5527 | }; | |
5528 | ||
5529 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
5530 | { | |
5531 | struct rpc_task *task; | |
5532 | struct nfs4_get_lease_time_args args; | |
5533 | struct nfs4_get_lease_time_res res = { | |
5534 | .lr_fsinfo = fsinfo, | |
5535 | }; | |
5536 | struct nfs4_get_lease_time_data data = { | |
5537 | .args = &args, | |
5538 | .res = &res, | |
5539 | .clp = clp, | |
5540 | }; | |
5541 | struct rpc_message msg = { | |
5542 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
5543 | .rpc_argp = &args, | |
5544 | .rpc_resp = &res, | |
5545 | }; | |
5546 | struct rpc_task_setup task_setup = { | |
5547 | .rpc_client = clp->cl_rpcclient, | |
5548 | .rpc_message = &msg, | |
5549 | .callback_ops = &nfs4_get_lease_time_ops, | |
5550 | .callback_data = &data, | |
5551 | .flags = RPC_TASK_TIMEOUT, | |
5552 | }; | |
5553 | int status; | |
5554 | ||
5555 | nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); | |
5556 | nfs4_set_sequence_privileged(&args.la_seq_args); | |
5557 | dprintk("--> %s\n", __func__); | |
5558 | task = rpc_run_task(&task_setup); | |
5559 | ||
5560 | if (IS_ERR(task)) | |
5561 | status = PTR_ERR(task); | |
5562 | else { | |
5563 | status = task->tk_status; | |
5564 | rpc_put_task(task); | |
5565 | } | |
5566 | dprintk("<-- %s return %d\n", __func__, status); | |
5567 | ||
5568 | return status; | |
5569 | } | |
5570 | ||
5571 | /* | |
5572 | * Initialize the values to be used by the client in CREATE_SESSION | |
5573 | * If nfs4_init_session set the fore channel request and response sizes, | |
5574 | * use them. | |
5575 | * | |
5576 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
5577 | * always set csa_cachethis to FALSE because the current implementation | |
5578 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
5579 | */ | |
5580 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
5581 | { | |
5582 | struct nfs4_session *session = args->client->cl_session; | |
5583 | unsigned int mxrqst_sz = session->fc_target_max_rqst_sz, | |
5584 | mxresp_sz = session->fc_target_max_resp_sz; | |
5585 | ||
5586 | if (mxrqst_sz == 0) | |
5587 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
5588 | if (mxresp_sz == 0) | |
5589 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
5590 | /* Fore channel attributes */ | |
5591 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
5592 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
5593 | args->fc_attrs.max_ops = NFS4_MAX_OPS; | |
5594 | args->fc_attrs.max_reqs = max_session_slots; | |
5595 | ||
5596 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
5597 | "max_ops=%u max_reqs=%u\n", | |
5598 | __func__, | |
5599 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
5600 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); | |
5601 | ||
5602 | /* Back channel attributes */ | |
5603 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
5604 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
5605 | args->bc_attrs.max_resp_sz_cached = 0; | |
5606 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
5607 | args->bc_attrs.max_reqs = 1; | |
5608 | ||
5609 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
5610 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
5611 | __func__, | |
5612 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
5613 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
5614 | args->bc_attrs.max_reqs); | |
5615 | } | |
5616 | ||
5617 | static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) | |
5618 | { | |
5619 | struct nfs4_channel_attrs *sent = &args->fc_attrs; | |
5620 | struct nfs4_channel_attrs *rcvd = &session->fc_attrs; | |
5621 | ||
5622 | if (rcvd->max_resp_sz > sent->max_resp_sz) | |
5623 | return -EINVAL; | |
5624 | /* | |
5625 | * Our requested max_ops is the minimum we need; we're not | |
5626 | * prepared to break up compounds into smaller pieces than that. | |
5627 | * So, no point even trying to continue if the server won't | |
5628 | * cooperate: | |
5629 | */ | |
5630 | if (rcvd->max_ops < sent->max_ops) | |
5631 | return -EINVAL; | |
5632 | if (rcvd->max_reqs == 0) | |
5633 | return -EINVAL; | |
5634 | if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) | |
5635 | rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; | |
5636 | return 0; | |
5637 | } | |
5638 | ||
5639 | static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) | |
5640 | { | |
5641 | struct nfs4_channel_attrs *sent = &args->bc_attrs; | |
5642 | struct nfs4_channel_attrs *rcvd = &session->bc_attrs; | |
5643 | ||
5644 | if (rcvd->max_rqst_sz > sent->max_rqst_sz) | |
5645 | return -EINVAL; | |
5646 | if (rcvd->max_resp_sz < sent->max_resp_sz) | |
5647 | return -EINVAL; | |
5648 | if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) | |
5649 | return -EINVAL; | |
5650 | /* These would render the backchannel useless: */ | |
5651 | if (rcvd->max_ops != sent->max_ops) | |
5652 | return -EINVAL; | |
5653 | if (rcvd->max_reqs != sent->max_reqs) | |
5654 | return -EINVAL; | |
5655 | return 0; | |
5656 | } | |
5657 | ||
5658 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
5659 | struct nfs4_session *session) | |
5660 | { | |
5661 | int ret; | |
5662 | ||
5663 | ret = nfs4_verify_fore_channel_attrs(args, session); | |
5664 | if (ret) | |
5665 | return ret; | |
5666 | return nfs4_verify_back_channel_attrs(args, session); | |
5667 | } | |
5668 | ||
5669 | static int _nfs4_proc_create_session(struct nfs_client *clp, | |
5670 | struct rpc_cred *cred) | |
5671 | { | |
5672 | struct nfs4_session *session = clp->cl_session; | |
5673 | struct nfs41_create_session_args args = { | |
5674 | .client = clp, | |
5675 | .cb_program = NFS4_CALLBACK, | |
5676 | }; | |
5677 | struct nfs41_create_session_res res = { | |
5678 | .client = clp, | |
5679 | }; | |
5680 | struct rpc_message msg = { | |
5681 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
5682 | .rpc_argp = &args, | |
5683 | .rpc_resp = &res, | |
5684 | .rpc_cred = cred, | |
5685 | }; | |
5686 | int status; | |
5687 | ||
5688 | nfs4_init_channel_attrs(&args); | |
5689 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); | |
5690 | ||
5691 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5692 | ||
5693 | if (!status) { | |
5694 | /* Verify the session's negotiated channel_attrs values */ | |
5695 | status = nfs4_verify_channel_attrs(&args, session); | |
5696 | /* Increment the clientid slot sequence id */ | |
5697 | clp->cl_seqid++; | |
5698 | } | |
5699 | ||
5700 | return status; | |
5701 | } | |
5702 | ||
5703 | /* | |
5704 | * Issues a CREATE_SESSION operation to the server. | |
5705 | * It is the responsibility of the caller to verify the session is | |
5706 | * expired before calling this routine. | |
5707 | */ | |
5708 | int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) | |
5709 | { | |
5710 | int status; | |
5711 | unsigned *ptr; | |
5712 | struct nfs4_session *session = clp->cl_session; | |
5713 | ||
5714 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
5715 | ||
5716 | status = _nfs4_proc_create_session(clp, cred); | |
5717 | if (status) | |
5718 | goto out; | |
5719 | ||
5720 | /* Init or reset the session slot tables */ | |
5721 | status = nfs4_setup_session_slot_tables(session); | |
5722 | dprintk("slot table setup returned %d\n", status); | |
5723 | if (status) | |
5724 | goto out; | |
5725 | ||
5726 | ptr = (unsigned *)&session->sess_id.data[0]; | |
5727 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
5728 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
5729 | out: | |
5730 | dprintk("<-- %s\n", __func__); | |
5731 | return status; | |
5732 | } | |
5733 | ||
5734 | /* | |
5735 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
5736 | * The caller must serialize access to this routine. | |
5737 | */ | |
5738 | int nfs4_proc_destroy_session(struct nfs4_session *session, | |
5739 | struct rpc_cred *cred) | |
5740 | { | |
5741 | struct rpc_message msg = { | |
5742 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], | |
5743 | .rpc_argp = session, | |
5744 | .rpc_cred = cred, | |
5745 | }; | |
5746 | int status = 0; | |
5747 | ||
5748 | dprintk("--> nfs4_proc_destroy_session\n"); | |
5749 | ||
5750 | /* session is still being setup */ | |
5751 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
5752 | return status; | |
5753 | ||
5754 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); | |
5755 | ||
5756 | if (status) | |
5757 | dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " | |
5758 | "Session has been destroyed regardless...\n", status); | |
5759 | ||
5760 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
5761 | return status; | |
5762 | } | |
5763 | ||
5764 | /* | |
5765 | * Renew the cl_session lease. | |
5766 | */ | |
5767 | struct nfs4_sequence_data { | |
5768 | struct nfs_client *clp; | |
5769 | struct nfs4_sequence_args args; | |
5770 | struct nfs4_sequence_res res; | |
5771 | }; | |
5772 | ||
5773 | static void nfs41_sequence_release(void *data) | |
5774 | { | |
5775 | struct nfs4_sequence_data *calldata = data; | |
5776 | struct nfs_client *clp = calldata->clp; | |
5777 | ||
5778 | if (atomic_read(&clp->cl_count) > 1) | |
5779 | nfs4_schedule_state_renewal(clp); | |
5780 | nfs_put_client(clp); | |
5781 | kfree(calldata); | |
5782 | } | |
5783 | ||
5784 | static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) | |
5785 | { | |
5786 | switch(task->tk_status) { | |
5787 | case -NFS4ERR_DELAY: | |
5788 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5789 | return -EAGAIN; | |
5790 | default: | |
5791 | nfs4_schedule_lease_recovery(clp); | |
5792 | } | |
5793 | return 0; | |
5794 | } | |
5795 | ||
5796 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) | |
5797 | { | |
5798 | struct nfs4_sequence_data *calldata = data; | |
5799 | struct nfs_client *clp = calldata->clp; | |
5800 | ||
5801 | if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) | |
5802 | return; | |
5803 | ||
5804 | if (task->tk_status < 0) { | |
5805 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
5806 | if (atomic_read(&clp->cl_count) == 1) | |
5807 | goto out; | |
5808 | ||
5809 | if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { | |
5810 | rpc_restart_call_prepare(task); | |
5811 | return; | |
5812 | } | |
5813 | } | |
5814 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); | |
5815 | out: | |
5816 | dprintk("<-- %s\n", __func__); | |
5817 | } | |
5818 | ||
5819 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5820 | { | |
5821 | struct nfs4_sequence_data *calldata = data; | |
5822 | struct nfs_client *clp = calldata->clp; | |
5823 | struct nfs4_sequence_args *args; | |
5824 | struct nfs4_sequence_res *res; | |
5825 | ||
5826 | args = task->tk_msg.rpc_argp; | |
5827 | res = task->tk_msg.rpc_resp; | |
5828 | ||
5829 | nfs41_setup_sequence(clp->cl_session, args, res, task); | |
5830 | } | |
5831 | ||
5832 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5833 | .rpc_call_done = nfs41_sequence_call_done, | |
5834 | .rpc_call_prepare = nfs41_sequence_prepare, | |
5835 | .rpc_release = nfs41_sequence_release, | |
5836 | }; | |
5837 | ||
5838 | static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, | |
5839 | struct rpc_cred *cred, | |
5840 | bool is_privileged) | |
5841 | { | |
5842 | struct nfs4_sequence_data *calldata; | |
5843 | struct rpc_message msg = { | |
5844 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5845 | .rpc_cred = cred, | |
5846 | }; | |
5847 | struct rpc_task_setup task_setup_data = { | |
5848 | .rpc_client = clp->cl_rpcclient, | |
5849 | .rpc_message = &msg, | |
5850 | .callback_ops = &nfs41_sequence_ops, | |
5851 | .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT, | |
5852 | }; | |
5853 | ||
5854 | if (!atomic_inc_not_zero(&clp->cl_count)) | |
5855 | return ERR_PTR(-EIO); | |
5856 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); | |
5857 | if (calldata == NULL) { | |
5858 | nfs_put_client(clp); | |
5859 | return ERR_PTR(-ENOMEM); | |
5860 | } | |
5861 | nfs41_init_sequence(&calldata->args, &calldata->res, 0); | |
5862 | if (is_privileged) | |
5863 | nfs4_set_sequence_privileged(&calldata->args); | |
5864 | msg.rpc_argp = &calldata->args; | |
5865 | msg.rpc_resp = &calldata->res; | |
5866 | calldata->clp = clp; | |
5867 | task_setup_data.callback_data = calldata; | |
5868 | ||
5869 | return rpc_run_task(&task_setup_data); | |
5870 | } | |
5871 | ||
5872 | static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) | |
5873 | { | |
5874 | struct rpc_task *task; | |
5875 | int ret = 0; | |
5876 | ||
5877 | if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) | |
5878 | return 0; | |
5879 | task = _nfs41_proc_sequence(clp, cred, false); | |
5880 | if (IS_ERR(task)) | |
5881 | ret = PTR_ERR(task); | |
5882 | else | |
5883 | rpc_put_task_async(task); | |
5884 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5885 | return ret; | |
5886 | } | |
5887 | ||
5888 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5889 | { | |
5890 | struct rpc_task *task; | |
5891 | int ret; | |
5892 | ||
5893 | task = _nfs41_proc_sequence(clp, cred, true); | |
5894 | if (IS_ERR(task)) { | |
5895 | ret = PTR_ERR(task); | |
5896 | goto out; | |
5897 | } | |
5898 | ret = rpc_wait_for_completion_task(task); | |
5899 | if (!ret) { | |
5900 | struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; | |
5901 | ||
5902 | if (task->tk_status == 0) | |
5903 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
5904 | ret = task->tk_status; | |
5905 | } | |
5906 | rpc_put_task(task); | |
5907 | out: | |
5908 | dprintk("<-- %s status=%d\n", __func__, ret); | |
5909 | return ret; | |
5910 | } | |
5911 | ||
5912 | struct nfs4_reclaim_complete_data { | |
5913 | struct nfs_client *clp; | |
5914 | struct nfs41_reclaim_complete_args arg; | |
5915 | struct nfs41_reclaim_complete_res res; | |
5916 | }; | |
5917 | ||
5918 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5919 | { | |
5920 | struct nfs4_reclaim_complete_data *calldata = data; | |
5921 | ||
5922 | nfs41_setup_sequence(calldata->clp->cl_session, | |
5923 | &calldata->arg.seq_args, | |
5924 | &calldata->res.seq_res, | |
5925 | task); | |
5926 | } | |
5927 | ||
5928 | static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) | |
5929 | { | |
5930 | switch(task->tk_status) { | |
5931 | case 0: | |
5932 | case -NFS4ERR_COMPLETE_ALREADY: | |
5933 | case -NFS4ERR_WRONG_CRED: /* What to do here? */ | |
5934 | break; | |
5935 | case -NFS4ERR_DELAY: | |
5936 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
5937 | /* fall through */ | |
5938 | case -NFS4ERR_RETRY_UNCACHED_REP: | |
5939 | return -EAGAIN; | |
5940 | default: | |
5941 | nfs4_schedule_lease_recovery(clp); | |
5942 | } | |
5943 | return 0; | |
5944 | } | |
5945 | ||
5946 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) | |
5947 | { | |
5948 | struct nfs4_reclaim_complete_data *calldata = data; | |
5949 | struct nfs_client *clp = calldata->clp; | |
5950 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5951 | ||
5952 | dprintk("--> %s\n", __func__); | |
5953 | if (!nfs41_sequence_done(task, res)) | |
5954 | return; | |
5955 | ||
5956 | if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { | |
5957 | rpc_restart_call_prepare(task); | |
5958 | return; | |
5959 | } | |
5960 | dprintk("<-- %s\n", __func__); | |
5961 | } | |
5962 | ||
5963 | static void nfs4_free_reclaim_complete_data(void *data) | |
5964 | { | |
5965 | struct nfs4_reclaim_complete_data *calldata = data; | |
5966 | ||
5967 | kfree(calldata); | |
5968 | } | |
5969 | ||
5970 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5971 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5972 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5973 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5974 | }; | |
5975 | ||
5976 | /* | |
5977 | * Issue a global reclaim complete. | |
5978 | */ | |
5979 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5980 | { | |
5981 | struct nfs4_reclaim_complete_data *calldata; | |
5982 | struct rpc_task *task; | |
5983 | struct rpc_message msg = { | |
5984 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5985 | }; | |
5986 | struct rpc_task_setup task_setup_data = { | |
5987 | .rpc_client = clp->cl_rpcclient, | |
5988 | .rpc_message = &msg, | |
5989 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5990 | .flags = RPC_TASK_ASYNC, | |
5991 | }; | |
5992 | int status = -ENOMEM; | |
5993 | ||
5994 | dprintk("--> %s\n", __func__); | |
5995 | calldata = kzalloc(sizeof(*calldata), GFP_NOFS); | |
5996 | if (calldata == NULL) | |
5997 | goto out; | |
5998 | calldata->clp = clp; | |
5999 | calldata->arg.one_fs = 0; | |
6000 | ||
6001 | nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); | |
6002 | nfs4_set_sequence_privileged(&calldata->arg.seq_args); | |
6003 | msg.rpc_argp = &calldata->arg; | |
6004 | msg.rpc_resp = &calldata->res; | |
6005 | task_setup_data.callback_data = calldata; | |
6006 | task = rpc_run_task(&task_setup_data); | |
6007 | if (IS_ERR(task)) { | |
6008 | status = PTR_ERR(task); | |
6009 | goto out; | |
6010 | } | |
6011 | status = nfs4_wait_for_completion_rpc_task(task); | |
6012 | if (status == 0) | |
6013 | status = task->tk_status; | |
6014 | rpc_put_task(task); | |
6015 | return 0; | |
6016 | out: | |
6017 | dprintk("<-- %s status=%d\n", __func__, status); | |
6018 | return status; | |
6019 | } | |
6020 | ||
6021 | static void | |
6022 | nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) | |
6023 | { | |
6024 | struct nfs4_layoutget *lgp = calldata; | |
6025 | struct nfs_server *server = NFS_SERVER(lgp->args.inode); | |
6026 | struct nfs4_session *session = nfs4_get_session(server); | |
6027 | ||
6028 | dprintk("--> %s\n", __func__); | |
6029 | /* Note the is a race here, where a CB_LAYOUTRECALL can come in | |
6030 | * right now covering the LAYOUTGET we are about to send. | |
6031 | * However, that is not so catastrophic, and there seems | |
6032 | * to be no way to prevent it completely. | |
6033 | */ | |
6034 | if (nfs41_setup_sequence(session, &lgp->args.seq_args, | |
6035 | &lgp->res.seq_res, task)) | |
6036 | return; | |
6037 | if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, | |
6038 | NFS_I(lgp->args.inode)->layout, | |
6039 | lgp->args.ctx->state)) { | |
6040 | rpc_exit(task, NFS4_OK); | |
6041 | } | |
6042 | } | |
6043 | ||
6044 | static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) | |
6045 | { | |
6046 | struct nfs4_layoutget *lgp = calldata; | |
6047 | struct inode *inode = lgp->args.inode; | |
6048 | struct nfs_server *server = NFS_SERVER(inode); | |
6049 | struct pnfs_layout_hdr *lo; | |
6050 | struct nfs4_state *state = NULL; | |
6051 | unsigned long timeo, giveup; | |
6052 | ||
6053 | dprintk("--> %s\n", __func__); | |
6054 | ||
6055 | if (!nfs41_sequence_done(task, &lgp->res.seq_res)) | |
6056 | goto out; | |
6057 | ||
6058 | switch (task->tk_status) { | |
6059 | case 0: | |
6060 | goto out; | |
6061 | case -NFS4ERR_LAYOUTTRYLATER: | |
6062 | case -NFS4ERR_RECALLCONFLICT: | |
6063 | timeo = rpc_get_timeout(task->tk_client); | |
6064 | giveup = lgp->args.timestamp + timeo; | |
6065 | if (time_after(giveup, jiffies)) | |
6066 | task->tk_status = -NFS4ERR_DELAY; | |
6067 | break; | |
6068 | case -NFS4ERR_EXPIRED: | |
6069 | case -NFS4ERR_BAD_STATEID: | |
6070 | spin_lock(&inode->i_lock); | |
6071 | lo = NFS_I(inode)->layout; | |
6072 | if (!lo || list_empty(&lo->plh_segs)) { | |
6073 | spin_unlock(&inode->i_lock); | |
6074 | /* If the open stateid was bad, then recover it. */ | |
6075 | state = lgp->args.ctx->state; | |
6076 | } else { | |
6077 | LIST_HEAD(head); | |
6078 | ||
6079 | pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); | |
6080 | spin_unlock(&inode->i_lock); | |
6081 | /* Mark the bad layout state as invalid, then | |
6082 | * retry using the open stateid. */ | |
6083 | pnfs_free_lseg_list(&head); | |
6084 | } | |
6085 | } | |
6086 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) | |
6087 | rpc_restart_call_prepare(task); | |
6088 | out: | |
6089 | dprintk("<-- %s\n", __func__); | |
6090 | } | |
6091 | ||
6092 | static size_t max_response_pages(struct nfs_server *server) | |
6093 | { | |
6094 | u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; | |
6095 | return nfs_page_array_len(0, max_resp_sz); | |
6096 | } | |
6097 | ||
6098 | static void nfs4_free_pages(struct page **pages, size_t size) | |
6099 | { | |
6100 | int i; | |
6101 | ||
6102 | if (!pages) | |
6103 | return; | |
6104 | ||
6105 | for (i = 0; i < size; i++) { | |
6106 | if (!pages[i]) | |
6107 | break; | |
6108 | __free_page(pages[i]); | |
6109 | } | |
6110 | kfree(pages); | |
6111 | } | |
6112 | ||
6113 | static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) | |
6114 | { | |
6115 | struct page **pages; | |
6116 | int i; | |
6117 | ||
6118 | pages = kcalloc(size, sizeof(struct page *), gfp_flags); | |
6119 | if (!pages) { | |
6120 | dprintk("%s: can't alloc array of %zu pages\n", __func__, size); | |
6121 | return NULL; | |
6122 | } | |
6123 | ||
6124 | for (i = 0; i < size; i++) { | |
6125 | pages[i] = alloc_page(gfp_flags); | |
6126 | if (!pages[i]) { | |
6127 | dprintk("%s: failed to allocate page\n", __func__); | |
6128 | nfs4_free_pages(pages, size); | |
6129 | return NULL; | |
6130 | } | |
6131 | } | |
6132 | ||
6133 | return pages; | |
6134 | } | |
6135 | ||
6136 | static void nfs4_layoutget_release(void *calldata) | |
6137 | { | |
6138 | struct nfs4_layoutget *lgp = calldata; | |
6139 | struct inode *inode = lgp->args.inode; | |
6140 | struct nfs_server *server = NFS_SERVER(inode); | |
6141 | size_t max_pages = max_response_pages(server); | |
6142 | ||
6143 | dprintk("--> %s\n", __func__); | |
6144 | nfs4_free_pages(lgp->args.layout.pages, max_pages); | |
6145 | pnfs_put_layout_hdr(NFS_I(inode)->layout); | |
6146 | put_nfs_open_context(lgp->args.ctx); | |
6147 | kfree(calldata); | |
6148 | dprintk("<-- %s\n", __func__); | |
6149 | } | |
6150 | ||
6151 | static const struct rpc_call_ops nfs4_layoutget_call_ops = { | |
6152 | .rpc_call_prepare = nfs4_layoutget_prepare, | |
6153 | .rpc_call_done = nfs4_layoutget_done, | |
6154 | .rpc_release = nfs4_layoutget_release, | |
6155 | }; | |
6156 | ||
6157 | struct pnfs_layout_segment * | |
6158 | nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) | |
6159 | { | |
6160 | struct inode *inode = lgp->args.inode; | |
6161 | struct nfs_server *server = NFS_SERVER(inode); | |
6162 | size_t max_pages = max_response_pages(server); | |
6163 | struct rpc_task *task; | |
6164 | struct rpc_message msg = { | |
6165 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], | |
6166 | .rpc_argp = &lgp->args, | |
6167 | .rpc_resp = &lgp->res, | |
6168 | }; | |
6169 | struct rpc_task_setup task_setup_data = { | |
6170 | .rpc_client = server->client, | |
6171 | .rpc_message = &msg, | |
6172 | .callback_ops = &nfs4_layoutget_call_ops, | |
6173 | .callback_data = lgp, | |
6174 | .flags = RPC_TASK_ASYNC, | |
6175 | }; | |
6176 | struct pnfs_layout_segment *lseg = NULL; | |
6177 | int status = 0; | |
6178 | ||
6179 | dprintk("--> %s\n", __func__); | |
6180 | ||
6181 | lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); | |
6182 | if (!lgp->args.layout.pages) { | |
6183 | nfs4_layoutget_release(lgp); | |
6184 | return ERR_PTR(-ENOMEM); | |
6185 | } | |
6186 | lgp->args.layout.pglen = max_pages * PAGE_SIZE; | |
6187 | lgp->args.timestamp = jiffies; | |
6188 | ||
6189 | lgp->res.layoutp = &lgp->args.layout; | |
6190 | lgp->res.seq_res.sr_slot = NULL; | |
6191 | nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); | |
6192 | ||
6193 | /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ | |
6194 | pnfs_get_layout_hdr(NFS_I(inode)->layout); | |
6195 | ||
6196 | task = rpc_run_task(&task_setup_data); | |
6197 | if (IS_ERR(task)) | |
6198 | return ERR_CAST(task); | |
6199 | status = nfs4_wait_for_completion_rpc_task(task); | |
6200 | if (status == 0) | |
6201 | status = task->tk_status; | |
6202 | /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ | |
6203 | if (status == 0 && lgp->res.layoutp->len) | |
6204 | lseg = pnfs_layout_process(lgp); | |
6205 | rpc_put_task(task); | |
6206 | dprintk("<-- %s status=%d\n", __func__, status); | |
6207 | if (status) | |
6208 | return ERR_PTR(status); | |
6209 | return lseg; | |
6210 | } | |
6211 | ||
6212 | static void | |
6213 | nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) | |
6214 | { | |
6215 | struct nfs4_layoutreturn *lrp = calldata; | |
6216 | ||
6217 | dprintk("--> %s\n", __func__); | |
6218 | nfs41_setup_sequence(lrp->clp->cl_session, | |
6219 | &lrp->args.seq_args, | |
6220 | &lrp->res.seq_res, | |
6221 | task); | |
6222 | } | |
6223 | ||
6224 | static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) | |
6225 | { | |
6226 | struct nfs4_layoutreturn *lrp = calldata; | |
6227 | struct nfs_server *server; | |
6228 | ||
6229 | dprintk("--> %s\n", __func__); | |
6230 | ||
6231 | if (!nfs41_sequence_done(task, &lrp->res.seq_res)) | |
6232 | return; | |
6233 | ||
6234 | server = NFS_SERVER(lrp->args.inode); | |
6235 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { | |
6236 | rpc_restart_call_prepare(task); | |
6237 | return; | |
6238 | } | |
6239 | dprintk("<-- %s\n", __func__); | |
6240 | } | |
6241 | ||
6242 | static void nfs4_layoutreturn_release(void *calldata) | |
6243 | { | |
6244 | struct nfs4_layoutreturn *lrp = calldata; | |
6245 | struct pnfs_layout_hdr *lo = lrp->args.layout; | |
6246 | ||
6247 | dprintk("--> %s\n", __func__); | |
6248 | spin_lock(&lo->plh_inode->i_lock); | |
6249 | if (lrp->res.lrs_present) | |
6250 | pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); | |
6251 | lo->plh_block_lgets--; | |
6252 | spin_unlock(&lo->plh_inode->i_lock); | |
6253 | pnfs_put_layout_hdr(lrp->args.layout); | |
6254 | kfree(calldata); | |
6255 | dprintk("<-- %s\n", __func__); | |
6256 | } | |
6257 | ||
6258 | static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { | |
6259 | .rpc_call_prepare = nfs4_layoutreturn_prepare, | |
6260 | .rpc_call_done = nfs4_layoutreturn_done, | |
6261 | .rpc_release = nfs4_layoutreturn_release, | |
6262 | }; | |
6263 | ||
6264 | int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) | |
6265 | { | |
6266 | struct rpc_task *task; | |
6267 | struct rpc_message msg = { | |
6268 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], | |
6269 | .rpc_argp = &lrp->args, | |
6270 | .rpc_resp = &lrp->res, | |
6271 | }; | |
6272 | struct rpc_task_setup task_setup_data = { | |
6273 | .rpc_client = lrp->clp->cl_rpcclient, | |
6274 | .rpc_message = &msg, | |
6275 | .callback_ops = &nfs4_layoutreturn_call_ops, | |
6276 | .callback_data = lrp, | |
6277 | }; | |
6278 | int status; | |
6279 | ||
6280 | dprintk("--> %s\n", __func__); | |
6281 | nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); | |
6282 | task = rpc_run_task(&task_setup_data); | |
6283 | if (IS_ERR(task)) | |
6284 | return PTR_ERR(task); | |
6285 | status = task->tk_status; | |
6286 | dprintk("<-- %s status=%d\n", __func__, status); | |
6287 | rpc_put_task(task); | |
6288 | return status; | |
6289 | } | |
6290 | ||
6291 | /* | |
6292 | * Retrieve the list of Data Server devices from the MDS. | |
6293 | */ | |
6294 | static int _nfs4_getdevicelist(struct nfs_server *server, | |
6295 | const struct nfs_fh *fh, | |
6296 | struct pnfs_devicelist *devlist) | |
6297 | { | |
6298 | struct nfs4_getdevicelist_args args = { | |
6299 | .fh = fh, | |
6300 | .layoutclass = server->pnfs_curr_ld->id, | |
6301 | }; | |
6302 | struct nfs4_getdevicelist_res res = { | |
6303 | .devlist = devlist, | |
6304 | }; | |
6305 | struct rpc_message msg = { | |
6306 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], | |
6307 | .rpc_argp = &args, | |
6308 | .rpc_resp = &res, | |
6309 | }; | |
6310 | int status; | |
6311 | ||
6312 | dprintk("--> %s\n", __func__); | |
6313 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, | |
6314 | &res.seq_res, 0); | |
6315 | dprintk("<-- %s status=%d\n", __func__, status); | |
6316 | return status; | |
6317 | } | |
6318 | ||
6319 | int nfs4_proc_getdevicelist(struct nfs_server *server, | |
6320 | const struct nfs_fh *fh, | |
6321 | struct pnfs_devicelist *devlist) | |
6322 | { | |
6323 | struct nfs4_exception exception = { }; | |
6324 | int err; | |
6325 | ||
6326 | do { | |
6327 | err = nfs4_handle_exception(server, | |
6328 | _nfs4_getdevicelist(server, fh, devlist), | |
6329 | &exception); | |
6330 | } while (exception.retry); | |
6331 | ||
6332 | dprintk("%s: err=%d, num_devs=%u\n", __func__, | |
6333 | err, devlist->num_devs); | |
6334 | ||
6335 | return err; | |
6336 | } | |
6337 | EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); | |
6338 | ||
6339 | static int | |
6340 | _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) | |
6341 | { | |
6342 | struct nfs4_getdeviceinfo_args args = { | |
6343 | .pdev = pdev, | |
6344 | }; | |
6345 | struct nfs4_getdeviceinfo_res res = { | |
6346 | .pdev = pdev, | |
6347 | }; | |
6348 | struct rpc_message msg = { | |
6349 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], | |
6350 | .rpc_argp = &args, | |
6351 | .rpc_resp = &res, | |
6352 | }; | |
6353 | int status; | |
6354 | ||
6355 | dprintk("--> %s\n", __func__); | |
6356 | status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
6357 | dprintk("<-- %s status=%d\n", __func__, status); | |
6358 | ||
6359 | return status; | |
6360 | } | |
6361 | ||
6362 | int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev) | |
6363 | { | |
6364 | struct nfs4_exception exception = { }; | |
6365 | int err; | |
6366 | ||
6367 | do { | |
6368 | err = nfs4_handle_exception(server, | |
6369 | _nfs4_proc_getdeviceinfo(server, pdev), | |
6370 | &exception); | |
6371 | } while (exception.retry); | |
6372 | return err; | |
6373 | } | |
6374 | EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); | |
6375 | ||
6376 | static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) | |
6377 | { | |
6378 | struct nfs4_layoutcommit_data *data = calldata; | |
6379 | struct nfs_server *server = NFS_SERVER(data->args.inode); | |
6380 | struct nfs4_session *session = nfs4_get_session(server); | |
6381 | ||
6382 | nfs41_setup_sequence(session, | |
6383 | &data->args.seq_args, | |
6384 | &data->res.seq_res, | |
6385 | task); | |
6386 | } | |
6387 | ||
6388 | static void | |
6389 | nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) | |
6390 | { | |
6391 | struct nfs4_layoutcommit_data *data = calldata; | |
6392 | struct nfs_server *server = NFS_SERVER(data->args.inode); | |
6393 | ||
6394 | if (!nfs41_sequence_done(task, &data->res.seq_res)) | |
6395 | return; | |
6396 | ||
6397 | switch (task->tk_status) { /* Just ignore these failures */ | |
6398 | case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ | |
6399 | case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ | |
6400 | case -NFS4ERR_BADLAYOUT: /* no layout */ | |
6401 | case -NFS4ERR_GRACE: /* loca_recalim always false */ | |
6402 | task->tk_status = 0; | |
6403 | break; | |
6404 | case 0: | |
6405 | nfs_post_op_update_inode_force_wcc(data->args.inode, | |
6406 | data->res.fattr); | |
6407 | break; | |
6408 | default: | |
6409 | if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { | |
6410 | rpc_restart_call_prepare(task); | |
6411 | return; | |
6412 | } | |
6413 | } | |
6414 | } | |
6415 | ||
6416 | static void nfs4_layoutcommit_release(void *calldata) | |
6417 | { | |
6418 | struct nfs4_layoutcommit_data *data = calldata; | |
6419 | ||
6420 | pnfs_cleanup_layoutcommit(data); | |
6421 | put_rpccred(data->cred); | |
6422 | kfree(data); | |
6423 | } | |
6424 | ||
6425 | static const struct rpc_call_ops nfs4_layoutcommit_ops = { | |
6426 | .rpc_call_prepare = nfs4_layoutcommit_prepare, | |
6427 | .rpc_call_done = nfs4_layoutcommit_done, | |
6428 | .rpc_release = nfs4_layoutcommit_release, | |
6429 | }; | |
6430 | ||
6431 | int | |
6432 | nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) | |
6433 | { | |
6434 | struct rpc_message msg = { | |
6435 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], | |
6436 | .rpc_argp = &data->args, | |
6437 | .rpc_resp = &data->res, | |
6438 | .rpc_cred = data->cred, | |
6439 | }; | |
6440 | struct rpc_task_setup task_setup_data = { | |
6441 | .task = &data->task, | |
6442 | .rpc_client = NFS_CLIENT(data->args.inode), | |
6443 | .rpc_message = &msg, | |
6444 | .callback_ops = &nfs4_layoutcommit_ops, | |
6445 | .callback_data = data, | |
6446 | .flags = RPC_TASK_ASYNC, | |
6447 | }; | |
6448 | struct rpc_task *task; | |
6449 | int status = 0; | |
6450 | ||
6451 | dprintk("NFS: %4d initiating layoutcommit call. sync %d " | |
6452 | "lbw: %llu inode %lu\n", | |
6453 | data->task.tk_pid, sync, | |
6454 | data->args.lastbytewritten, | |
6455 | data->args.inode->i_ino); | |
6456 | ||
6457 | nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); | |
6458 | task = rpc_run_task(&task_setup_data); | |
6459 | if (IS_ERR(task)) | |
6460 | return PTR_ERR(task); | |
6461 | if (sync == false) | |
6462 | goto out; | |
6463 | status = nfs4_wait_for_completion_rpc_task(task); | |
6464 | if (status != 0) | |
6465 | goto out; | |
6466 | status = task->tk_status; | |
6467 | out: | |
6468 | dprintk("%s: status %d\n", __func__, status); | |
6469 | rpc_put_task(task); | |
6470 | return status; | |
6471 | } | |
6472 | ||
6473 | static int | |
6474 | _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, | |
6475 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) | |
6476 | { | |
6477 | struct nfs41_secinfo_no_name_args args = { | |
6478 | .style = SECINFO_STYLE_CURRENT_FH, | |
6479 | }; | |
6480 | struct nfs4_secinfo_res res = { | |
6481 | .flavors = flavors, | |
6482 | }; | |
6483 | struct rpc_message msg = { | |
6484 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], | |
6485 | .rpc_argp = &args, | |
6486 | .rpc_resp = &res, | |
6487 | }; | |
6488 | return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); | |
6489 | } | |
6490 | ||
6491 | static int | |
6492 | nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, | |
6493 | struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) | |
6494 | { | |
6495 | struct nfs4_exception exception = { }; | |
6496 | int err; | |
6497 | do { | |
6498 | err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); | |
6499 | switch (err) { | |
6500 | case 0: | |
6501 | case -NFS4ERR_WRONGSEC: | |
6502 | case -NFS4ERR_NOTSUPP: | |
6503 | goto out; | |
6504 | default: | |
6505 | err = nfs4_handle_exception(server, err, &exception); | |
6506 | } | |
6507 | } while (exception.retry); | |
6508 | out: | |
6509 | return err; | |
6510 | } | |
6511 | ||
6512 | static int | |
6513 | nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, | |
6514 | struct nfs_fsinfo *info) | |
6515 | { | |
6516 | int err; | |
6517 | struct page *page; | |
6518 | rpc_authflavor_t flavor; | |
6519 | struct nfs4_secinfo_flavors *flavors; | |
6520 | ||
6521 | page = alloc_page(GFP_KERNEL); | |
6522 | if (!page) { | |
6523 | err = -ENOMEM; | |
6524 | goto out; | |
6525 | } | |
6526 | ||
6527 | flavors = page_address(page); | |
6528 | err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); | |
6529 | ||
6530 | /* | |
6531 | * Fall back on "guess and check" method if | |
6532 | * the server doesn't support SECINFO_NO_NAME | |
6533 | */ | |
6534 | if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) { | |
6535 | err = nfs4_find_root_sec(server, fhandle, info); | |
6536 | goto out_freepage; | |
6537 | } | |
6538 | if (err) | |
6539 | goto out_freepage; | |
6540 | ||
6541 | flavor = nfs_find_best_sec(flavors); | |
6542 | if (err == 0) | |
6543 | err = nfs4_lookup_root_sec(server, fhandle, info, flavor); | |
6544 | ||
6545 | out_freepage: | |
6546 | put_page(page); | |
6547 | if (err == -EACCES) | |
6548 | return -EPERM; | |
6549 | out: | |
6550 | return err; | |
6551 | } | |
6552 | ||
6553 | static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6554 | { | |
6555 | int status; | |
6556 | struct nfs41_test_stateid_args args = { | |
6557 | .stateid = stateid, | |
6558 | }; | |
6559 | struct nfs41_test_stateid_res res; | |
6560 | struct rpc_message msg = { | |
6561 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], | |
6562 | .rpc_argp = &args, | |
6563 | .rpc_resp = &res, | |
6564 | }; | |
6565 | ||
6566 | dprintk("NFS call test_stateid %p\n", stateid); | |
6567 | nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); | |
6568 | nfs4_set_sequence_privileged(&args.seq_args); | |
6569 | status = nfs4_call_sync_sequence(server->client, server, &msg, | |
6570 | &args.seq_args, &res.seq_res); | |
6571 | if (status != NFS_OK) { | |
6572 | dprintk("NFS reply test_stateid: failed, %d\n", status); | |
6573 | return status; | |
6574 | } | |
6575 | dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); | |
6576 | return -res.status; | |
6577 | } | |
6578 | ||
6579 | /** | |
6580 | * nfs41_test_stateid - perform a TEST_STATEID operation | |
6581 | * | |
6582 | * @server: server / transport on which to perform the operation | |
6583 | * @stateid: state ID to test | |
6584 | * | |
6585 | * Returns NFS_OK if the server recognizes that "stateid" is valid. | |
6586 | * Otherwise a negative NFS4ERR value is returned if the operation | |
6587 | * failed or the state ID is not currently valid. | |
6588 | */ | |
6589 | static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6590 | { | |
6591 | struct nfs4_exception exception = { }; | |
6592 | int err; | |
6593 | do { | |
6594 | err = _nfs41_test_stateid(server, stateid); | |
6595 | if (err != -NFS4ERR_DELAY) | |
6596 | break; | |
6597 | nfs4_handle_exception(server, err, &exception); | |
6598 | } while (exception.retry); | |
6599 | return err; | |
6600 | } | |
6601 | ||
6602 | static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6603 | { | |
6604 | struct nfs41_free_stateid_args args = { | |
6605 | .stateid = stateid, | |
6606 | }; | |
6607 | struct nfs41_free_stateid_res res; | |
6608 | struct rpc_message msg = { | |
6609 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], | |
6610 | .rpc_argp = &args, | |
6611 | .rpc_resp = &res, | |
6612 | }; | |
6613 | int status; | |
6614 | ||
6615 | dprintk("NFS call free_stateid %p\n", stateid); | |
6616 | nfs41_init_sequence(&args.seq_args, &res.seq_res, 0); | |
6617 | nfs4_set_sequence_privileged(&args.seq_args); | |
6618 | status = nfs4_call_sync_sequence(server->client, server, &msg, | |
6619 | &args.seq_args, &res.seq_res); | |
6620 | dprintk("NFS reply free_stateid: %d\n", status); | |
6621 | return status; | |
6622 | } | |
6623 | ||
6624 | /** | |
6625 | * nfs41_free_stateid - perform a FREE_STATEID operation | |
6626 | * | |
6627 | * @server: server / transport on which to perform the operation | |
6628 | * @stateid: state ID to release | |
6629 | * | |
6630 | * Returns NFS_OK if the server freed "stateid". Otherwise a | |
6631 | * negative NFS4ERR value is returned. | |
6632 | */ | |
6633 | static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid) | |
6634 | { | |
6635 | struct nfs4_exception exception = { }; | |
6636 | int err; | |
6637 | do { | |
6638 | err = _nfs4_free_stateid(server, stateid); | |
6639 | if (err != -NFS4ERR_DELAY) | |
6640 | break; | |
6641 | nfs4_handle_exception(server, err, &exception); | |
6642 | } while (exception.retry); | |
6643 | return err; | |
6644 | } | |
6645 | ||
6646 | static bool nfs41_match_stateid(const nfs4_stateid *s1, | |
6647 | const nfs4_stateid *s2) | |
6648 | { | |
6649 | if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) | |
6650 | return false; | |
6651 | ||
6652 | if (s1->seqid == s2->seqid) | |
6653 | return true; | |
6654 | if (s1->seqid == 0 || s2->seqid == 0) | |
6655 | return true; | |
6656 | ||
6657 | return false; | |
6658 | } | |
6659 | ||
6660 | #endif /* CONFIG_NFS_V4_1 */ | |
6661 | ||
6662 | static bool nfs4_match_stateid(const nfs4_stateid *s1, | |
6663 | const nfs4_stateid *s2) | |
6664 | { | |
6665 | return nfs4_stateid_match(s1, s2); | |
6666 | } | |
6667 | ||
6668 | ||
6669 | static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { | |
6670 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
6671 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
6672 | .recover_open = nfs4_open_reclaim, | |
6673 | .recover_lock = nfs4_lock_reclaim, | |
6674 | .establish_clid = nfs4_init_clientid, | |
6675 | .get_clid_cred = nfs4_get_setclientid_cred, | |
6676 | .detect_trunking = nfs40_discover_server_trunking, | |
6677 | }; | |
6678 | ||
6679 | #if defined(CONFIG_NFS_V4_1) | |
6680 | static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
6681 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
6682 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
6683 | .recover_open = nfs4_open_reclaim, | |
6684 | .recover_lock = nfs4_lock_reclaim, | |
6685 | .establish_clid = nfs41_init_clientid, | |
6686 | .get_clid_cred = nfs4_get_exchange_id_cred, | |
6687 | .reclaim_complete = nfs41_proc_reclaim_complete, | |
6688 | .detect_trunking = nfs41_discover_server_trunking, | |
6689 | }; | |
6690 | #endif /* CONFIG_NFS_V4_1 */ | |
6691 | ||
6692 | static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
6693 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
6694 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
6695 | .recover_open = nfs4_open_expired, | |
6696 | .recover_lock = nfs4_lock_expired, | |
6697 | .establish_clid = nfs4_init_clientid, | |
6698 | .get_clid_cred = nfs4_get_setclientid_cred, | |
6699 | }; | |
6700 | ||
6701 | #if defined(CONFIG_NFS_V4_1) | |
6702 | static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
6703 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
6704 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
6705 | .recover_open = nfs41_open_expired, | |
6706 | .recover_lock = nfs41_lock_expired, | |
6707 | .establish_clid = nfs41_init_clientid, | |
6708 | .get_clid_cred = nfs4_get_exchange_id_cred, | |
6709 | }; | |
6710 | #endif /* CONFIG_NFS_V4_1 */ | |
6711 | ||
6712 | static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { | |
6713 | .sched_state_renewal = nfs4_proc_async_renew, | |
6714 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, | |
6715 | .renew_lease = nfs4_proc_renew, | |
6716 | }; | |
6717 | ||
6718 | #if defined(CONFIG_NFS_V4_1) | |
6719 | static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
6720 | .sched_state_renewal = nfs41_proc_async_sequence, | |
6721 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, | |
6722 | .renew_lease = nfs4_proc_sequence, | |
6723 | }; | |
6724 | #endif | |
6725 | ||
6726 | static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { | |
6727 | .minor_version = 0, | |
6728 | .call_sync = _nfs4_call_sync, | |
6729 | .match_stateid = nfs4_match_stateid, | |
6730 | .find_root_sec = nfs4_find_root_sec, | |
6731 | .reboot_recovery_ops = &nfs40_reboot_recovery_ops, | |
6732 | .nograce_recovery_ops = &nfs40_nograce_recovery_ops, | |
6733 | .state_renewal_ops = &nfs40_state_renewal_ops, | |
6734 | }; | |
6735 | ||
6736 | #if defined(CONFIG_NFS_V4_1) | |
6737 | static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { | |
6738 | .minor_version = 1, | |
6739 | .call_sync = nfs4_call_sync_sequence, | |
6740 | .match_stateid = nfs41_match_stateid, | |
6741 | .find_root_sec = nfs41_find_root_sec, | |
6742 | .reboot_recovery_ops = &nfs41_reboot_recovery_ops, | |
6743 | .nograce_recovery_ops = &nfs41_nograce_recovery_ops, | |
6744 | .state_renewal_ops = &nfs41_state_renewal_ops, | |
6745 | }; | |
6746 | #endif | |
6747 | ||
6748 | const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { | |
6749 | [0] = &nfs_v4_0_minor_ops, | |
6750 | #if defined(CONFIG_NFS_V4_1) | |
6751 | [1] = &nfs_v4_1_minor_ops, | |
6752 | #endif | |
6753 | }; | |
6754 | ||
6755 | const struct inode_operations nfs4_dir_inode_operations = { | |
6756 | .create = nfs_create, | |
6757 | .lookup = nfs_lookup, | |
6758 | .atomic_open = nfs_atomic_open, | |
6759 | .link = nfs_link, | |
6760 | .unlink = nfs_unlink, | |
6761 | .symlink = nfs_symlink, | |
6762 | .mkdir = nfs_mkdir, | |
6763 | .rmdir = nfs_rmdir, | |
6764 | .mknod = nfs_mknod, | |
6765 | .rename = nfs_rename, | |
6766 | .permission = nfs_permission, | |
6767 | .getattr = nfs_getattr, | |
6768 | .setattr = nfs_setattr, | |
6769 | .getxattr = generic_getxattr, | |
6770 | .setxattr = generic_setxattr, | |
6771 | .listxattr = generic_listxattr, | |
6772 | .removexattr = generic_removexattr, | |
6773 | }; | |
6774 | ||
6775 | static const struct inode_operations nfs4_file_inode_operations = { | |
6776 | .permission = nfs_permission, | |
6777 | .getattr = nfs_getattr, | |
6778 | .setattr = nfs_setattr, | |
6779 | .getxattr = generic_getxattr, | |
6780 | .setxattr = generic_setxattr, | |
6781 | .listxattr = generic_listxattr, | |
6782 | .removexattr = generic_removexattr, | |
6783 | }; | |
6784 | ||
6785 | const struct nfs_rpc_ops nfs_v4_clientops = { | |
6786 | .version = 4, /* protocol version */ | |
6787 | .dentry_ops = &nfs4_dentry_operations, | |
6788 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6789 | .file_inode_ops = &nfs4_file_inode_operations, | |
6790 | .file_ops = &nfs4_file_operations, | |
6791 | .getroot = nfs4_proc_get_root, | |
6792 | .submount = nfs4_submount, | |
6793 | .try_mount = nfs4_try_mount, | |
6794 | .getattr = nfs4_proc_getattr, | |
6795 | .setattr = nfs4_proc_setattr, | |
6796 | .lookup = nfs4_proc_lookup, | |
6797 | .access = nfs4_proc_access, | |
6798 | .readlink = nfs4_proc_readlink, | |
6799 | .create = nfs4_proc_create, | |
6800 | .remove = nfs4_proc_remove, | |
6801 | .unlink_setup = nfs4_proc_unlink_setup, | |
6802 | .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, | |
6803 | .unlink_done = nfs4_proc_unlink_done, | |
6804 | .rename = nfs4_proc_rename, | |
6805 | .rename_setup = nfs4_proc_rename_setup, | |
6806 | .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, | |
6807 | .rename_done = nfs4_proc_rename_done, | |
6808 | .link = nfs4_proc_link, | |
6809 | .symlink = nfs4_proc_symlink, | |
6810 | .mkdir = nfs4_proc_mkdir, | |
6811 | .rmdir = nfs4_proc_remove, | |
6812 | .readdir = nfs4_proc_readdir, | |
6813 | .mknod = nfs4_proc_mknod, | |
6814 | .statfs = nfs4_proc_statfs, | |
6815 | .fsinfo = nfs4_proc_fsinfo, | |
6816 | .pathconf = nfs4_proc_pathconf, | |
6817 | .set_capabilities = nfs4_server_capabilities, | |
6818 | .decode_dirent = nfs4_decode_dirent, | |
6819 | .read_setup = nfs4_proc_read_setup, | |
6820 | .read_pageio_init = pnfs_pageio_init_read, | |
6821 | .read_rpc_prepare = nfs4_proc_read_rpc_prepare, | |
6822 | .read_done = nfs4_read_done, | |
6823 | .write_setup = nfs4_proc_write_setup, | |
6824 | .write_pageio_init = pnfs_pageio_init_write, | |
6825 | .write_rpc_prepare = nfs4_proc_write_rpc_prepare, | |
6826 | .write_done = nfs4_write_done, | |
6827 | .commit_setup = nfs4_proc_commit_setup, | |
6828 | .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, | |
6829 | .commit_done = nfs4_commit_done, | |
6830 | .lock = nfs4_proc_lock, | |
6831 | .clear_acl_cache = nfs4_zap_acl_attr, | |
6832 | .close_context = nfs4_close_context, | |
6833 | .open_context = nfs4_atomic_open, | |
6834 | .have_delegation = nfs4_have_delegation, | |
6835 | .return_delegation = nfs4_inode_return_delegation, | |
6836 | .alloc_client = nfs4_alloc_client, | |
6837 | .init_client = nfs4_init_client, | |
6838 | .free_client = nfs4_free_client, | |
6839 | .create_server = nfs4_create_server, | |
6840 | .clone_server = nfs_clone_server, | |
6841 | }; | |
6842 | ||
6843 | static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { | |
6844 | .prefix = XATTR_NAME_NFSV4_ACL, | |
6845 | .list = nfs4_xattr_list_nfs4_acl, | |
6846 | .get = nfs4_xattr_get_nfs4_acl, | |
6847 | .set = nfs4_xattr_set_nfs4_acl, | |
6848 | }; | |
6849 | ||
6850 | const struct xattr_handler *nfs4_xattr_handlers[] = { | |
6851 | &nfs4_xattr_nfs4_acl_handler, | |
6852 | NULL | |
6853 | }; | |
6854 | ||
6855 | /* | |
6856 | * Local variables: | |
6857 | * c-basic-offset: 8 | |
6858 | * End: | |
6859 | */ |