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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/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
50 | #include <linux/mount.h> | |
51 | #include <linux/module.h> | |
52 | ||
53 | #include "nfs4_fs.h" | |
54 | #include "delegation.h" | |
55 | #include "internal.h" | |
56 | #include "iostat.h" | |
57 | #include "callback.h" | |
58 | ||
59 | #define NFSDBG_FACILITY NFSDBG_PROC | |
60 | ||
61 | #define NFS4_POLL_RETRY_MIN (HZ/10) | |
62 | #define NFS4_POLL_RETRY_MAX (15*HZ) | |
63 | ||
64 | struct nfs4_opendata; | |
65 | static int _nfs4_proc_open(struct nfs4_opendata *data); | |
66 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); | |
67 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); | |
68 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
69 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
70 | ||
71 | /* Prevent leaks of NFSv4 errors into userland */ | |
72 | static int nfs4_map_errors(int err) | |
73 | { | |
74 | if (err < -1000) { | |
75 | dprintk("%s could not handle NFSv4 error %d\n", | |
76 | __func__, -err); | |
77 | return -EIO; | |
78 | } | |
79 | return err; | |
80 | } | |
81 | ||
82 | /* | |
83 | * This is our standard bitmap for GETATTR requests. | |
84 | */ | |
85 | const u32 nfs4_fattr_bitmap[2] = { | |
86 | FATTR4_WORD0_TYPE | |
87 | | FATTR4_WORD0_CHANGE | |
88 | | FATTR4_WORD0_SIZE | |
89 | | FATTR4_WORD0_FSID | |
90 | | FATTR4_WORD0_FILEID, | |
91 | FATTR4_WORD1_MODE | |
92 | | FATTR4_WORD1_NUMLINKS | |
93 | | FATTR4_WORD1_OWNER | |
94 | | FATTR4_WORD1_OWNER_GROUP | |
95 | | FATTR4_WORD1_RAWDEV | |
96 | | FATTR4_WORD1_SPACE_USED | |
97 | | FATTR4_WORD1_TIME_ACCESS | |
98 | | FATTR4_WORD1_TIME_METADATA | |
99 | | FATTR4_WORD1_TIME_MODIFY | |
100 | }; | |
101 | ||
102 | const u32 nfs4_statfs_bitmap[2] = { | |
103 | FATTR4_WORD0_FILES_AVAIL | |
104 | | FATTR4_WORD0_FILES_FREE | |
105 | | FATTR4_WORD0_FILES_TOTAL, | |
106 | FATTR4_WORD1_SPACE_AVAIL | |
107 | | FATTR4_WORD1_SPACE_FREE | |
108 | | FATTR4_WORD1_SPACE_TOTAL | |
109 | }; | |
110 | ||
111 | const u32 nfs4_pathconf_bitmap[2] = { | |
112 | FATTR4_WORD0_MAXLINK | |
113 | | FATTR4_WORD0_MAXNAME, | |
114 | 0 | |
115 | }; | |
116 | ||
117 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
118 | | FATTR4_WORD0_MAXREAD | |
119 | | FATTR4_WORD0_MAXWRITE | |
120 | | FATTR4_WORD0_LEASE_TIME, | |
121 | 0 | |
122 | }; | |
123 | ||
124 | const u32 nfs4_fs_locations_bitmap[2] = { | |
125 | FATTR4_WORD0_TYPE | |
126 | | FATTR4_WORD0_CHANGE | |
127 | | FATTR4_WORD0_SIZE | |
128 | | FATTR4_WORD0_FSID | |
129 | | FATTR4_WORD0_FILEID | |
130 | | FATTR4_WORD0_FS_LOCATIONS, | |
131 | FATTR4_WORD1_MODE | |
132 | | FATTR4_WORD1_NUMLINKS | |
133 | | FATTR4_WORD1_OWNER | |
134 | | FATTR4_WORD1_OWNER_GROUP | |
135 | | FATTR4_WORD1_RAWDEV | |
136 | | FATTR4_WORD1_SPACE_USED | |
137 | | FATTR4_WORD1_TIME_ACCESS | |
138 | | FATTR4_WORD1_TIME_METADATA | |
139 | | FATTR4_WORD1_TIME_MODIFY | |
140 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
141 | }; | |
142 | ||
143 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, | |
144 | struct nfs4_readdir_arg *readdir) | |
145 | { | |
146 | __be32 *start, *p; | |
147 | ||
148 | BUG_ON(readdir->count < 80); | |
149 | if (cookie > 2) { | |
150 | readdir->cookie = cookie; | |
151 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); | |
152 | return; | |
153 | } | |
154 | ||
155 | readdir->cookie = 0; | |
156 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
157 | if (cookie == 2) | |
158 | return; | |
159 | ||
160 | /* | |
161 | * NFSv4 servers do not return entries for '.' and '..' | |
162 | * Therefore, we fake these entries here. We let '.' | |
163 | * have cookie 0 and '..' have cookie 1. Note that | |
164 | * when talking to the server, we always send cookie 0 | |
165 | * instead of 1 or 2. | |
166 | */ | |
167 | start = p = kmap_atomic(*readdir->pages, KM_USER0); | |
168 | ||
169 | if (cookie == 0) { | |
170 | *p++ = xdr_one; /* next */ | |
171 | *p++ = xdr_zero; /* cookie, first word */ | |
172 | *p++ = xdr_one; /* cookie, second word */ | |
173 | *p++ = xdr_one; /* entry len */ | |
174 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
175 | p++; | |
176 | *p++ = xdr_one; /* bitmap length */ | |
177 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
178 | *p++ = htonl(8); /* attribute buffer length */ | |
179 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); | |
180 | } | |
181 | ||
182 | *p++ = xdr_one; /* next */ | |
183 | *p++ = xdr_zero; /* cookie, first word */ | |
184 | *p++ = xdr_two; /* cookie, second word */ | |
185 | *p++ = xdr_two; /* entry len */ | |
186 | memcpy(p, "..\0\0", 4); /* entry */ | |
187 | p++; | |
188 | *p++ = xdr_one; /* bitmap length */ | |
189 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
190 | *p++ = htonl(8); /* attribute buffer length */ | |
191 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); | |
192 | ||
193 | readdir->pgbase = (char *)p - (char *)start; | |
194 | readdir->count -= readdir->pgbase; | |
195 | kunmap_atomic(start, KM_USER0); | |
196 | } | |
197 | ||
198 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) | |
199 | { | |
200 | int res; | |
201 | ||
202 | might_sleep(); | |
203 | ||
204 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, | |
205 | nfs_wait_bit_killable, TASK_KILLABLE); | |
206 | return res; | |
207 | } | |
208 | ||
209 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
210 | { | |
211 | int res = 0; | |
212 | ||
213 | might_sleep(); | |
214 | ||
215 | if (*timeout <= 0) | |
216 | *timeout = NFS4_POLL_RETRY_MIN; | |
217 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
218 | *timeout = NFS4_POLL_RETRY_MAX; | |
219 | schedule_timeout_killable(*timeout); | |
220 | if (fatal_signal_pending(current)) | |
221 | res = -ERESTARTSYS; | |
222 | *timeout <<= 1; | |
223 | return res; | |
224 | } | |
225 | ||
226 | /* This is the error handling routine for processes that are allowed | |
227 | * to sleep. | |
228 | */ | |
229 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
230 | { | |
231 | struct nfs_client *clp = server->nfs_client; | |
232 | struct nfs4_state *state = exception->state; | |
233 | int ret = errorcode; | |
234 | ||
235 | exception->retry = 0; | |
236 | switch(errorcode) { | |
237 | case 0: | |
238 | return 0; | |
239 | case -NFS4ERR_ADMIN_REVOKED: | |
240 | case -NFS4ERR_BAD_STATEID: | |
241 | case -NFS4ERR_OPENMODE: | |
242 | if (state == NULL) | |
243 | break; | |
244 | nfs4_state_mark_reclaim_nograce(clp, state); | |
245 | case -NFS4ERR_STALE_CLIENTID: | |
246 | case -NFS4ERR_STALE_STATEID: | |
247 | case -NFS4ERR_EXPIRED: | |
248 | nfs4_schedule_state_recovery(clp); | |
249 | ret = nfs4_wait_clnt_recover(clp); | |
250 | if (ret == 0) | |
251 | exception->retry = 1; | |
252 | break; | |
253 | case -NFS4ERR_FILE_OPEN: | |
254 | case -NFS4ERR_GRACE: | |
255 | case -NFS4ERR_DELAY: | |
256 | ret = nfs4_delay(server->client, &exception->timeout); | |
257 | if (ret != 0) | |
258 | break; | |
259 | case -NFS4ERR_OLD_STATEID: | |
260 | exception->retry = 1; | |
261 | } | |
262 | /* We failed to handle the error */ | |
263 | return nfs4_map_errors(ret); | |
264 | } | |
265 | ||
266 | ||
267 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) | |
268 | { | |
269 | struct nfs_client *clp = server->nfs_client; | |
270 | spin_lock(&clp->cl_lock); | |
271 | if (time_before(clp->cl_last_renewal,timestamp)) | |
272 | clp->cl_last_renewal = timestamp; | |
273 | spin_unlock(&clp->cl_lock); | |
274 | } | |
275 | ||
276 | #if defined(CONFIG_NFS_V4_1) | |
277 | ||
278 | /* | |
279 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
280 | * | |
281 | * freeing a slot is trivially done by clearing its respective bit | |
282 | * in the bitmap. | |
283 | * If the freed slotid equals highest_used_slotid we want to update it | |
284 | * so that the server would be able to size down the slot table if needed, | |
285 | * otherwise we know that the highest_used_slotid is still in use. | |
286 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
287 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
288 | * highest slotid in use. | |
289 | * If none found, highest_used_slotid is set to -1. | |
290 | */ | |
291 | static void | |
292 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
293 | { | |
294 | int slotid = free_slotid; | |
295 | ||
296 | spin_lock(&tbl->slot_tbl_lock); | |
297 | /* clear used bit in bitmap */ | |
298 | __clear_bit(slotid, tbl->used_slots); | |
299 | ||
300 | /* update highest_used_slotid when it is freed */ | |
301 | if (slotid == tbl->highest_used_slotid) { | |
302 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
303 | if (slotid >= 0 && slotid < tbl->max_slots) | |
304 | tbl->highest_used_slotid = slotid; | |
305 | else | |
306 | tbl->highest_used_slotid = -1; | |
307 | } | |
308 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
309 | spin_unlock(&tbl->slot_tbl_lock); | |
310 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, | |
311 | free_slotid, tbl->highest_used_slotid); | |
312 | } | |
313 | ||
314 | void nfs41_sequence_free_slot(const struct nfs_client *clp, | |
315 | struct nfs4_sequence_res *res) | |
316 | { | |
317 | struct nfs4_slot_table *tbl; | |
318 | ||
319 | if (!nfs4_has_session(clp)) { | |
320 | dprintk("%s: No session\n", __func__); | |
321 | return; | |
322 | } | |
323 | tbl = &clp->cl_session->fc_slot_table; | |
324 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { | |
325 | dprintk("%s: No slot\n", __func__); | |
326 | /* just wake up the next guy waiting since | |
327 | * we may have not consumed a slot after all */ | |
328 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
329 | return; | |
330 | } | |
331 | nfs4_free_slot(tbl, res->sr_slotid); | |
332 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
333 | } | |
334 | ||
335 | static void nfs41_sequence_done(struct nfs_client *clp, | |
336 | struct nfs4_sequence_res *res, | |
337 | int rpc_status) | |
338 | { | |
339 | unsigned long timestamp; | |
340 | struct nfs4_slot_table *tbl; | |
341 | struct nfs4_slot *slot; | |
342 | ||
343 | /* | |
344 | * sr_status remains 1 if an RPC level error occurred. The server | |
345 | * may or may not have processed the sequence operation.. | |
346 | * Proceed as if the server received and processed the sequence | |
347 | * operation. | |
348 | */ | |
349 | if (res->sr_status == 1) | |
350 | res->sr_status = NFS_OK; | |
351 | ||
352 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
353 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
354 | goto out; | |
355 | ||
356 | tbl = &clp->cl_session->fc_slot_table; | |
357 | slot = tbl->slots + res->sr_slotid; | |
358 | ||
359 | if (res->sr_status == 0) { | |
360 | /* Update the slot's sequence and clientid lease timer */ | |
361 | ++slot->seq_nr; | |
362 | timestamp = res->sr_renewal_time; | |
363 | spin_lock(&clp->cl_lock); | |
364 | if (time_before(clp->cl_last_renewal, timestamp)) | |
365 | clp->cl_last_renewal = timestamp; | |
366 | spin_unlock(&clp->cl_lock); | |
367 | return; | |
368 | } | |
369 | out: | |
370 | /* The session may be reset by one of the error handlers. */ | |
371 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
372 | nfs41_sequence_free_slot(clp, res); | |
373 | } | |
374 | ||
375 | /* | |
376 | * nfs4_find_slot - efficiently look for a free slot | |
377 | * | |
378 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
379 | * If found, we mark the slot as used, update the highest_used_slotid, | |
380 | * and respectively set up the sequence operation args. | |
381 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
382 | * | |
383 | * Note: must be called with under the slot_tbl_lock. | |
384 | */ | |
385 | static u8 | |
386 | nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task) | |
387 | { | |
388 | int slotid; | |
389 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
390 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
391 | ||
392 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", | |
393 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
394 | tbl->max_slots); | |
395 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
396 | if (slotid >= tbl->max_slots) | |
397 | goto out; | |
398 | __set_bit(slotid, tbl->used_slots); | |
399 | if (slotid > tbl->highest_used_slotid) | |
400 | tbl->highest_used_slotid = slotid; | |
401 | ret_id = slotid; | |
402 | out: | |
403 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
404 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
405 | return ret_id; | |
406 | } | |
407 | ||
408 | static int nfs41_setup_sequence(struct nfs4_session *session, | |
409 | struct nfs4_sequence_args *args, | |
410 | struct nfs4_sequence_res *res, | |
411 | int cache_reply, | |
412 | struct rpc_task *task) | |
413 | { | |
414 | struct nfs4_slot *slot; | |
415 | struct nfs4_slot_table *tbl; | |
416 | u8 slotid; | |
417 | ||
418 | dprintk("--> %s\n", __func__); | |
419 | /* slot already allocated? */ | |
420 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
421 | return 0; | |
422 | ||
423 | memset(res, 0, sizeof(*res)); | |
424 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
425 | tbl = &session->fc_slot_table; | |
426 | ||
427 | spin_lock(&tbl->slot_tbl_lock); | |
428 | slotid = nfs4_find_slot(tbl, task); | |
429 | if (slotid == NFS4_MAX_SLOT_TABLE) { | |
430 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
431 | spin_unlock(&tbl->slot_tbl_lock); | |
432 | dprintk("<-- %s: no free slots\n", __func__); | |
433 | return -EAGAIN; | |
434 | } | |
435 | spin_unlock(&tbl->slot_tbl_lock); | |
436 | ||
437 | slot = tbl->slots + slotid; | |
438 | args->sa_session = session; | |
439 | args->sa_slotid = slotid; | |
440 | args->sa_cache_this = cache_reply; | |
441 | ||
442 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
443 | ||
444 | res->sr_session = session; | |
445 | res->sr_slotid = slotid; | |
446 | res->sr_renewal_time = jiffies; | |
447 | /* | |
448 | * sr_status is only set in decode_sequence, and so will remain | |
449 | * set to 1 if an rpc level failure occurs. | |
450 | */ | |
451 | res->sr_status = 1; | |
452 | return 0; | |
453 | } | |
454 | ||
455 | int nfs4_setup_sequence(struct nfs_client *clp, | |
456 | struct nfs4_sequence_args *args, | |
457 | struct nfs4_sequence_res *res, | |
458 | int cache_reply, | |
459 | struct rpc_task *task) | |
460 | { | |
461 | int ret = 0; | |
462 | ||
463 | dprintk("--> %s clp %p session %p sr_slotid %d\n", | |
464 | __func__, clp, clp->cl_session, res->sr_slotid); | |
465 | ||
466 | if (!nfs4_has_session(clp)) | |
467 | goto out; | |
468 | ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, | |
469 | task); | |
470 | if (ret != -EAGAIN) { | |
471 | /* terminate rpc task */ | |
472 | task->tk_status = ret; | |
473 | task->tk_action = NULL; | |
474 | } | |
475 | out: | |
476 | dprintk("<-- %s status=%d\n", __func__, ret); | |
477 | return ret; | |
478 | } | |
479 | ||
480 | struct nfs41_call_sync_data { | |
481 | struct nfs_client *clp; | |
482 | struct nfs4_sequence_args *seq_args; | |
483 | struct nfs4_sequence_res *seq_res; | |
484 | int cache_reply; | |
485 | }; | |
486 | ||
487 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
488 | { | |
489 | struct nfs41_call_sync_data *data = calldata; | |
490 | ||
491 | dprintk("--> %s data->clp->cl_session %p\n", __func__, | |
492 | data->clp->cl_session); | |
493 | if (nfs4_setup_sequence(data->clp, data->seq_args, | |
494 | data->seq_res, data->cache_reply, task)) | |
495 | return; | |
496 | rpc_call_start(task); | |
497 | } | |
498 | ||
499 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) | |
500 | { | |
501 | struct nfs41_call_sync_data *data = calldata; | |
502 | ||
503 | nfs41_sequence_done(data->clp, data->seq_res, task->tk_status); | |
504 | nfs41_sequence_free_slot(data->clp, data->seq_res); | |
505 | } | |
506 | ||
507 | struct rpc_call_ops nfs41_call_sync_ops = { | |
508 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
509 | .rpc_call_done = nfs41_call_sync_done, | |
510 | }; | |
511 | ||
512 | static int nfs4_call_sync_sequence(struct nfs_client *clp, | |
513 | struct rpc_clnt *clnt, | |
514 | struct rpc_message *msg, | |
515 | struct nfs4_sequence_args *args, | |
516 | struct nfs4_sequence_res *res, | |
517 | int cache_reply) | |
518 | { | |
519 | int ret; | |
520 | struct rpc_task *task; | |
521 | struct nfs41_call_sync_data data = { | |
522 | .clp = clp, | |
523 | .seq_args = args, | |
524 | .seq_res = res, | |
525 | .cache_reply = cache_reply, | |
526 | }; | |
527 | struct rpc_task_setup task_setup = { | |
528 | .rpc_client = clnt, | |
529 | .rpc_message = msg, | |
530 | .callback_ops = &nfs41_call_sync_ops, | |
531 | .callback_data = &data | |
532 | }; | |
533 | ||
534 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
535 | task = rpc_run_task(&task_setup); | |
536 | if (IS_ERR(task)) | |
537 | ret = PTR_ERR(task); | |
538 | else { | |
539 | ret = task->tk_status; | |
540 | rpc_put_task(task); | |
541 | } | |
542 | return ret; | |
543 | } | |
544 | ||
545 | int _nfs4_call_sync_session(struct nfs_server *server, | |
546 | struct rpc_message *msg, | |
547 | struct nfs4_sequence_args *args, | |
548 | struct nfs4_sequence_res *res, | |
549 | int cache_reply) | |
550 | { | |
551 | return nfs4_call_sync_sequence(server->nfs_client, server->client, | |
552 | msg, args, res, cache_reply); | |
553 | } | |
554 | ||
555 | #endif /* CONFIG_NFS_V4_1 */ | |
556 | ||
557 | int _nfs4_call_sync(struct nfs_server *server, | |
558 | struct rpc_message *msg, | |
559 | struct nfs4_sequence_args *args, | |
560 | struct nfs4_sequence_res *res, | |
561 | int cache_reply) | |
562 | { | |
563 | args->sa_session = res->sr_session = NULL; | |
564 | return rpc_call_sync(server->client, msg, 0); | |
565 | } | |
566 | ||
567 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
568 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
569 | &(res)->seq_res, (cache_reply)) | |
570 | ||
571 | static void nfs4_sequence_done(const struct nfs_server *server, | |
572 | struct nfs4_sequence_res *res, int rpc_status) | |
573 | { | |
574 | #ifdef CONFIG_NFS_V4_1 | |
575 | if (nfs4_has_session(server->nfs_client)) | |
576 | nfs41_sequence_done(server->nfs_client, res, rpc_status); | |
577 | #endif /* CONFIG_NFS_V4_1 */ | |
578 | } | |
579 | ||
580 | /* no restart, therefore free slot here */ | |
581 | static void nfs4_sequence_done_free_slot(const struct nfs_server *server, | |
582 | struct nfs4_sequence_res *res, | |
583 | int rpc_status) | |
584 | { | |
585 | nfs4_sequence_done(server, res, rpc_status); | |
586 | nfs4_sequence_free_slot(server->nfs_client, res); | |
587 | } | |
588 | ||
589 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) | |
590 | { | |
591 | struct nfs_inode *nfsi = NFS_I(dir); | |
592 | ||
593 | spin_lock(&dir->i_lock); | |
594 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; | |
595 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
596 | nfs_force_lookup_revalidate(dir); | |
597 | nfsi->change_attr = cinfo->after; | |
598 | spin_unlock(&dir->i_lock); | |
599 | } | |
600 | ||
601 | struct nfs4_opendata { | |
602 | struct kref kref; | |
603 | struct nfs_openargs o_arg; | |
604 | struct nfs_openres o_res; | |
605 | struct nfs_open_confirmargs c_arg; | |
606 | struct nfs_open_confirmres c_res; | |
607 | struct nfs_fattr f_attr; | |
608 | struct nfs_fattr dir_attr; | |
609 | struct path path; | |
610 | struct dentry *dir; | |
611 | struct nfs4_state_owner *owner; | |
612 | struct nfs4_state *state; | |
613 | struct iattr attrs; | |
614 | unsigned long timestamp; | |
615 | unsigned int rpc_done : 1; | |
616 | int rpc_status; | |
617 | int cancelled; | |
618 | }; | |
619 | ||
620 | ||
621 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
622 | { | |
623 | p->o_res.f_attr = &p->f_attr; | |
624 | p->o_res.dir_attr = &p->dir_attr; | |
625 | p->o_res.seqid = p->o_arg.seqid; | |
626 | p->c_res.seqid = p->c_arg.seqid; | |
627 | p->o_res.server = p->o_arg.server; | |
628 | nfs_fattr_init(&p->f_attr); | |
629 | nfs_fattr_init(&p->dir_attr); | |
630 | } | |
631 | ||
632 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, | |
633 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, | |
634 | const struct iattr *attrs) | |
635 | { | |
636 | struct dentry *parent = dget_parent(path->dentry); | |
637 | struct inode *dir = parent->d_inode; | |
638 | struct nfs_server *server = NFS_SERVER(dir); | |
639 | struct nfs4_opendata *p; | |
640 | ||
641 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
642 | if (p == NULL) | |
643 | goto err; | |
644 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
645 | if (p->o_arg.seqid == NULL) | |
646 | goto err_free; | |
647 | p->path.mnt = mntget(path->mnt); | |
648 | p->path.dentry = dget(path->dentry); | |
649 | p->dir = parent; | |
650 | p->owner = sp; | |
651 | atomic_inc(&sp->so_count); | |
652 | p->o_arg.fh = NFS_FH(dir); | |
653 | p->o_arg.open_flags = flags; | |
654 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
655 | p->o_arg.clientid = server->nfs_client->cl_clientid; | |
656 | p->o_arg.id = sp->so_owner_id.id; | |
657 | p->o_arg.name = &p->path.dentry->d_name; | |
658 | p->o_arg.server = server; | |
659 | p->o_arg.bitmask = server->attr_bitmask; | |
660 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
661 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
662 | if (flags & O_EXCL) { | |
663 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
664 | s[0] = jiffies; | |
665 | s[1] = current->pid; | |
666 | } else if (flags & O_CREAT) { | |
667 | p->o_arg.u.attrs = &p->attrs; | |
668 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
669 | } | |
670 | p->c_arg.fh = &p->o_res.fh; | |
671 | p->c_arg.stateid = &p->o_res.stateid; | |
672 | p->c_arg.seqid = p->o_arg.seqid; | |
673 | nfs4_init_opendata_res(p); | |
674 | kref_init(&p->kref); | |
675 | return p; | |
676 | err_free: | |
677 | kfree(p); | |
678 | err: | |
679 | dput(parent); | |
680 | return NULL; | |
681 | } | |
682 | ||
683 | static void nfs4_opendata_free(struct kref *kref) | |
684 | { | |
685 | struct nfs4_opendata *p = container_of(kref, | |
686 | struct nfs4_opendata, kref); | |
687 | ||
688 | nfs_free_seqid(p->o_arg.seqid); | |
689 | if (p->state != NULL) | |
690 | nfs4_put_open_state(p->state); | |
691 | nfs4_put_state_owner(p->owner); | |
692 | dput(p->dir); | |
693 | path_put(&p->path); | |
694 | kfree(p); | |
695 | } | |
696 | ||
697 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
698 | { | |
699 | if (p != NULL) | |
700 | kref_put(&p->kref, nfs4_opendata_free); | |
701 | } | |
702 | ||
703 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) | |
704 | { | |
705 | int ret; | |
706 | ||
707 | ret = rpc_wait_for_completion_task(task); | |
708 | return ret; | |
709 | } | |
710 | ||
711 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) | |
712 | { | |
713 | int ret = 0; | |
714 | ||
715 | if (open_mode & O_EXCL) | |
716 | goto out; | |
717 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
718 | case FMODE_READ: | |
719 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
720 | break; | |
721 | case FMODE_WRITE: | |
722 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
723 | break; | |
724 | case FMODE_READ|FMODE_WRITE: | |
725 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
726 | } | |
727 | out: | |
728 | return ret; | |
729 | } | |
730 | ||
731 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) | |
732 | { | |
733 | if ((delegation->type & fmode) != fmode) | |
734 | return 0; | |
735 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) | |
736 | return 0; | |
737 | nfs_mark_delegation_referenced(delegation); | |
738 | return 1; | |
739 | } | |
740 | ||
741 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) | |
742 | { | |
743 | switch (fmode) { | |
744 | case FMODE_WRITE: | |
745 | state->n_wronly++; | |
746 | break; | |
747 | case FMODE_READ: | |
748 | state->n_rdonly++; | |
749 | break; | |
750 | case FMODE_READ|FMODE_WRITE: | |
751 | state->n_rdwr++; | |
752 | } | |
753 | nfs4_state_set_mode_locked(state, state->state | fmode); | |
754 | } | |
755 | ||
756 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
757 | { | |
758 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
759 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
760 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
761 | switch (fmode) { | |
762 | case FMODE_READ: | |
763 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
764 | break; | |
765 | case FMODE_WRITE: | |
766 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
767 | break; | |
768 | case FMODE_READ|FMODE_WRITE: | |
769 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
770 | } | |
771 | } | |
772 | ||
773 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) | |
774 | { | |
775 | write_seqlock(&state->seqlock); | |
776 | nfs_set_open_stateid_locked(state, stateid, fmode); | |
777 | write_sequnlock(&state->seqlock); | |
778 | } | |
779 | ||
780 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) | |
781 | { | |
782 | /* | |
783 | * Protect the call to nfs4_state_set_mode_locked and | |
784 | * serialise the stateid update | |
785 | */ | |
786 | write_seqlock(&state->seqlock); | |
787 | if (deleg_stateid != NULL) { | |
788 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
789 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
790 | } | |
791 | if (open_stateid != NULL) | |
792 | nfs_set_open_stateid_locked(state, open_stateid, fmode); | |
793 | write_sequnlock(&state->seqlock); | |
794 | spin_lock(&state->owner->so_lock); | |
795 | update_open_stateflags(state, fmode); | |
796 | spin_unlock(&state->owner->so_lock); | |
797 | } | |
798 | ||
799 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) | |
800 | { | |
801 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
802 | struct nfs_delegation *deleg_cur; | |
803 | int ret = 0; | |
804 | ||
805 | fmode &= (FMODE_READ|FMODE_WRITE); | |
806 | ||
807 | rcu_read_lock(); | |
808 | deleg_cur = rcu_dereference(nfsi->delegation); | |
809 | if (deleg_cur == NULL) | |
810 | goto no_delegation; | |
811 | ||
812 | spin_lock(&deleg_cur->lock); | |
813 | if (nfsi->delegation != deleg_cur || | |
814 | (deleg_cur->type & fmode) != fmode) | |
815 | goto no_delegation_unlock; | |
816 | ||
817 | if (delegation == NULL) | |
818 | delegation = &deleg_cur->stateid; | |
819 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
820 | goto no_delegation_unlock; | |
821 | ||
822 | nfs_mark_delegation_referenced(deleg_cur); | |
823 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); | |
824 | ret = 1; | |
825 | no_delegation_unlock: | |
826 | spin_unlock(&deleg_cur->lock); | |
827 | no_delegation: | |
828 | rcu_read_unlock(); | |
829 | ||
830 | if (!ret && open_stateid != NULL) { | |
831 | __update_open_stateid(state, open_stateid, NULL, fmode); | |
832 | ret = 1; | |
833 | } | |
834 | ||
835 | return ret; | |
836 | } | |
837 | ||
838 | ||
839 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) | |
840 | { | |
841 | struct nfs_delegation *delegation; | |
842 | ||
843 | rcu_read_lock(); | |
844 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
845 | if (delegation == NULL || (delegation->type & fmode) == fmode) { | |
846 | rcu_read_unlock(); | |
847 | return; | |
848 | } | |
849 | rcu_read_unlock(); | |
850 | nfs_inode_return_delegation(inode); | |
851 | } | |
852 | ||
853 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) | |
854 | { | |
855 | struct nfs4_state *state = opendata->state; | |
856 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
857 | struct nfs_delegation *delegation; | |
858 | int open_mode = opendata->o_arg.open_flags & O_EXCL; | |
859 | fmode_t fmode = opendata->o_arg.fmode; | |
860 | nfs4_stateid stateid; | |
861 | int ret = -EAGAIN; | |
862 | ||
863 | for (;;) { | |
864 | if (can_open_cached(state, fmode, open_mode)) { | |
865 | spin_lock(&state->owner->so_lock); | |
866 | if (can_open_cached(state, fmode, open_mode)) { | |
867 | update_open_stateflags(state, fmode); | |
868 | spin_unlock(&state->owner->so_lock); | |
869 | goto out_return_state; | |
870 | } | |
871 | spin_unlock(&state->owner->so_lock); | |
872 | } | |
873 | rcu_read_lock(); | |
874 | delegation = rcu_dereference(nfsi->delegation); | |
875 | if (delegation == NULL || | |
876 | !can_open_delegated(delegation, fmode)) { | |
877 | rcu_read_unlock(); | |
878 | break; | |
879 | } | |
880 | /* Save the delegation */ | |
881 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
882 | rcu_read_unlock(); | |
883 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); | |
884 | if (ret != 0) | |
885 | goto out; | |
886 | ret = -EAGAIN; | |
887 | ||
888 | /* Try to update the stateid using the delegation */ | |
889 | if (update_open_stateid(state, NULL, &stateid, fmode)) | |
890 | goto out_return_state; | |
891 | } | |
892 | out: | |
893 | return ERR_PTR(ret); | |
894 | out_return_state: | |
895 | atomic_inc(&state->count); | |
896 | return state; | |
897 | } | |
898 | ||
899 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) | |
900 | { | |
901 | struct inode *inode; | |
902 | struct nfs4_state *state = NULL; | |
903 | struct nfs_delegation *delegation; | |
904 | int ret; | |
905 | ||
906 | if (!data->rpc_done) { | |
907 | state = nfs4_try_open_cached(data); | |
908 | goto out; | |
909 | } | |
910 | ||
911 | ret = -EAGAIN; | |
912 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) | |
913 | goto err; | |
914 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); | |
915 | ret = PTR_ERR(inode); | |
916 | if (IS_ERR(inode)) | |
917 | goto err; | |
918 | ret = -ENOMEM; | |
919 | state = nfs4_get_open_state(inode, data->owner); | |
920 | if (state == NULL) | |
921 | goto err_put_inode; | |
922 | if (data->o_res.delegation_type != 0) { | |
923 | int delegation_flags = 0; | |
924 | ||
925 | rcu_read_lock(); | |
926 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
927 | if (delegation) | |
928 | delegation_flags = delegation->flags; | |
929 | rcu_read_unlock(); | |
930 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) | |
931 | nfs_inode_set_delegation(state->inode, | |
932 | data->owner->so_cred, | |
933 | &data->o_res); | |
934 | else | |
935 | nfs_inode_reclaim_delegation(state->inode, | |
936 | data->owner->so_cred, | |
937 | &data->o_res); | |
938 | } | |
939 | ||
940 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
941 | data->o_arg.fmode); | |
942 | iput(inode); | |
943 | out: | |
944 | return state; | |
945 | err_put_inode: | |
946 | iput(inode); | |
947 | err: | |
948 | return ERR_PTR(ret); | |
949 | } | |
950 | ||
951 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) | |
952 | { | |
953 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
954 | struct nfs_open_context *ctx; | |
955 | ||
956 | spin_lock(&state->inode->i_lock); | |
957 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
958 | if (ctx->state != state) | |
959 | continue; | |
960 | get_nfs_open_context(ctx); | |
961 | spin_unlock(&state->inode->i_lock); | |
962 | return ctx; | |
963 | } | |
964 | spin_unlock(&state->inode->i_lock); | |
965 | return ERR_PTR(-ENOENT); | |
966 | } | |
967 | ||
968 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) | |
969 | { | |
970 | struct nfs4_opendata *opendata; | |
971 | ||
972 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); | |
973 | if (opendata == NULL) | |
974 | return ERR_PTR(-ENOMEM); | |
975 | opendata->state = state; | |
976 | atomic_inc(&state->count); | |
977 | return opendata; | |
978 | } | |
979 | ||
980 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) | |
981 | { | |
982 | struct nfs4_state *newstate; | |
983 | int ret; | |
984 | ||
985 | opendata->o_arg.open_flags = 0; | |
986 | opendata->o_arg.fmode = fmode; | |
987 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); | |
988 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
989 | nfs4_init_opendata_res(opendata); | |
990 | ret = _nfs4_proc_open(opendata); | |
991 | if (ret != 0) | |
992 | return ret; | |
993 | newstate = nfs4_opendata_to_nfs4_state(opendata); | |
994 | if (IS_ERR(newstate)) | |
995 | return PTR_ERR(newstate); | |
996 | nfs4_close_state(&opendata->path, newstate, fmode); | |
997 | *res = newstate; | |
998 | return 0; | |
999 | } | |
1000 | ||
1001 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1002 | { | |
1003 | struct nfs4_state *newstate; | |
1004 | int ret; | |
1005 | ||
1006 | /* memory barrier prior to reading state->n_* */ | |
1007 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1008 | smp_rmb(); | |
1009 | if (state->n_rdwr != 0) { | |
1010 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); | |
1011 | if (ret != 0) | |
1012 | return ret; | |
1013 | if (newstate != state) | |
1014 | return -ESTALE; | |
1015 | } | |
1016 | if (state->n_wronly != 0) { | |
1017 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); | |
1018 | if (ret != 0) | |
1019 | return ret; | |
1020 | if (newstate != state) | |
1021 | return -ESTALE; | |
1022 | } | |
1023 | if (state->n_rdonly != 0) { | |
1024 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); | |
1025 | if (ret != 0) | |
1026 | return ret; | |
1027 | if (newstate != state) | |
1028 | return -ESTALE; | |
1029 | } | |
1030 | /* | |
1031 | * We may have performed cached opens for all three recoveries. | |
1032 | * Check if we need to update the current stateid. | |
1033 | */ | |
1034 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1035 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
1036 | write_seqlock(&state->seqlock); | |
1037 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
1038 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
1039 | write_sequnlock(&state->seqlock); | |
1040 | } | |
1041 | return 0; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * OPEN_RECLAIM: | |
1046 | * reclaim state on the server after a reboot. | |
1047 | */ | |
1048 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1049 | { | |
1050 | struct nfs_delegation *delegation; | |
1051 | struct nfs4_opendata *opendata; | |
1052 | fmode_t delegation_type = 0; | |
1053 | int status; | |
1054 | ||
1055 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1056 | if (IS_ERR(opendata)) | |
1057 | return PTR_ERR(opendata); | |
1058 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; | |
1059 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1060 | rcu_read_lock(); | |
1061 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
1062 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) | |
1063 | delegation_type = delegation->type; | |
1064 | rcu_read_unlock(); | |
1065 | opendata->o_arg.u.delegation_type = delegation_type; | |
1066 | status = nfs4_open_recover(opendata, state); | |
1067 | nfs4_opendata_put(opendata); | |
1068 | return status; | |
1069 | } | |
1070 | ||
1071 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1072 | { | |
1073 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1074 | struct nfs4_exception exception = { }; | |
1075 | int err; | |
1076 | do { | |
1077 | err = _nfs4_do_open_reclaim(ctx, state); | |
1078 | if (err != -NFS4ERR_DELAY) | |
1079 | break; | |
1080 | nfs4_handle_exception(server, err, &exception); | |
1081 | } while (exception.retry); | |
1082 | return err; | |
1083 | } | |
1084 | ||
1085 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1086 | { | |
1087 | struct nfs_open_context *ctx; | |
1088 | int ret; | |
1089 | ||
1090 | ctx = nfs4_state_find_open_context(state); | |
1091 | if (IS_ERR(ctx)) | |
1092 | return PTR_ERR(ctx); | |
1093 | ret = nfs4_do_open_reclaim(ctx, state); | |
1094 | put_nfs_open_context(ctx); | |
1095 | return ret; | |
1096 | } | |
1097 | ||
1098 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1099 | { | |
1100 | struct nfs4_opendata *opendata; | |
1101 | int ret; | |
1102 | ||
1103 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1104 | if (IS_ERR(opendata)) | |
1105 | return PTR_ERR(opendata); | |
1106 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; | |
1107 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, | |
1108 | sizeof(opendata->o_arg.u.delegation.data)); | |
1109 | ret = nfs4_open_recover(opendata, state); | |
1110 | nfs4_opendata_put(opendata); | |
1111 | return ret; | |
1112 | } | |
1113 | ||
1114 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) | |
1115 | { | |
1116 | struct nfs4_exception exception = { }; | |
1117 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1118 | int err; | |
1119 | do { | |
1120 | err = _nfs4_open_delegation_recall(ctx, state, stateid); | |
1121 | switch (err) { | |
1122 | case 0: | |
1123 | return err; | |
1124 | case -NFS4ERR_STALE_CLIENTID: | |
1125 | case -NFS4ERR_STALE_STATEID: | |
1126 | case -NFS4ERR_EXPIRED: | |
1127 | /* Don't recall a delegation if it was lost */ | |
1128 | nfs4_schedule_state_recovery(server->nfs_client); | |
1129 | return err; | |
1130 | } | |
1131 | err = nfs4_handle_exception(server, err, &exception); | |
1132 | } while (exception.retry); | |
1133 | return err; | |
1134 | } | |
1135 | ||
1136 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) | |
1137 | { | |
1138 | struct nfs4_opendata *data = calldata; | |
1139 | ||
1140 | data->rpc_status = task->tk_status; | |
1141 | if (RPC_ASSASSINATED(task)) | |
1142 | return; | |
1143 | if (data->rpc_status == 0) { | |
1144 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, | |
1145 | sizeof(data->o_res.stateid.data)); | |
1146 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1147 | renew_lease(data->o_res.server, data->timestamp); | |
1148 | data->rpc_done = 1; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static void nfs4_open_confirm_release(void *calldata) | |
1153 | { | |
1154 | struct nfs4_opendata *data = calldata; | |
1155 | struct nfs4_state *state = NULL; | |
1156 | ||
1157 | /* If this request hasn't been cancelled, do nothing */ | |
1158 | if (data->cancelled == 0) | |
1159 | goto out_free; | |
1160 | /* In case of error, no cleanup! */ | |
1161 | if (!data->rpc_done) | |
1162 | goto out_free; | |
1163 | state = nfs4_opendata_to_nfs4_state(data); | |
1164 | if (!IS_ERR(state)) | |
1165 | nfs4_close_state(&data->path, state, data->o_arg.fmode); | |
1166 | out_free: | |
1167 | nfs4_opendata_put(data); | |
1168 | } | |
1169 | ||
1170 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
1171 | .rpc_call_done = nfs4_open_confirm_done, | |
1172 | .rpc_release = nfs4_open_confirm_release, | |
1173 | }; | |
1174 | ||
1175 | /* | |
1176 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1177 | */ | |
1178 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1179 | { | |
1180 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1181 | struct rpc_task *task; | |
1182 | struct rpc_message msg = { | |
1183 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1184 | .rpc_argp = &data->c_arg, | |
1185 | .rpc_resp = &data->c_res, | |
1186 | .rpc_cred = data->owner->so_cred, | |
1187 | }; | |
1188 | struct rpc_task_setup task_setup_data = { | |
1189 | .rpc_client = server->client, | |
1190 | .rpc_message = &msg, | |
1191 | .callback_ops = &nfs4_open_confirm_ops, | |
1192 | .callback_data = data, | |
1193 | .workqueue = nfsiod_workqueue, | |
1194 | .flags = RPC_TASK_ASYNC, | |
1195 | }; | |
1196 | int status; | |
1197 | ||
1198 | kref_get(&data->kref); | |
1199 | data->rpc_done = 0; | |
1200 | data->rpc_status = 0; | |
1201 | data->timestamp = jiffies; | |
1202 | task = rpc_run_task(&task_setup_data); | |
1203 | if (IS_ERR(task)) | |
1204 | return PTR_ERR(task); | |
1205 | status = nfs4_wait_for_completion_rpc_task(task); | |
1206 | if (status != 0) { | |
1207 | data->cancelled = 1; | |
1208 | smp_wmb(); | |
1209 | } else | |
1210 | status = data->rpc_status; | |
1211 | rpc_put_task(task); | |
1212 | return status; | |
1213 | } | |
1214 | ||
1215 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) | |
1216 | { | |
1217 | struct nfs4_opendata *data = calldata; | |
1218 | struct nfs4_state_owner *sp = data->owner; | |
1219 | ||
1220 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) | |
1221 | return; | |
1222 | /* | |
1223 | * Check if we still need to send an OPEN call, or if we can use | |
1224 | * a delegation instead. | |
1225 | */ | |
1226 | if (data->state != NULL) { | |
1227 | struct nfs_delegation *delegation; | |
1228 | ||
1229 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) | |
1230 | goto out_no_action; | |
1231 | rcu_read_lock(); | |
1232 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1233 | if (delegation != NULL && | |
1234 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { | |
1235 | rcu_read_unlock(); | |
1236 | goto out_no_action; | |
1237 | } | |
1238 | rcu_read_unlock(); | |
1239 | } | |
1240 | /* Update sequence id. */ | |
1241 | data->o_arg.id = sp->so_owner_id.id; | |
1242 | data->o_arg.clientid = sp->so_client->cl_clientid; | |
1243 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { | |
1244 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; | |
1245 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); | |
1246 | } | |
1247 | data->timestamp = jiffies; | |
1248 | if (nfs4_setup_sequence(data->o_arg.server->nfs_client, | |
1249 | &data->o_arg.seq_args, | |
1250 | &data->o_res.seq_res, 1, task)) | |
1251 | return; | |
1252 | rpc_call_start(task); | |
1253 | return; | |
1254 | out_no_action: | |
1255 | task->tk_action = NULL; | |
1256 | ||
1257 | } | |
1258 | ||
1259 | static void nfs4_open_done(struct rpc_task *task, void *calldata) | |
1260 | { | |
1261 | struct nfs4_opendata *data = calldata; | |
1262 | ||
1263 | data->rpc_status = task->tk_status; | |
1264 | ||
1265 | nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res, | |
1266 | task->tk_status); | |
1267 | ||
1268 | if (RPC_ASSASSINATED(task)) | |
1269 | return; | |
1270 | if (task->tk_status == 0) { | |
1271 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
1272 | case S_IFREG: | |
1273 | break; | |
1274 | case S_IFLNK: | |
1275 | data->rpc_status = -ELOOP; | |
1276 | break; | |
1277 | case S_IFDIR: | |
1278 | data->rpc_status = -EISDIR; | |
1279 | break; | |
1280 | default: | |
1281 | data->rpc_status = -ENOTDIR; | |
1282 | } | |
1283 | renew_lease(data->o_res.server, data->timestamp); | |
1284 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) | |
1285 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
1286 | } | |
1287 | data->rpc_done = 1; | |
1288 | } | |
1289 | ||
1290 | static void nfs4_open_release(void *calldata) | |
1291 | { | |
1292 | struct nfs4_opendata *data = calldata; | |
1293 | struct nfs4_state *state = NULL; | |
1294 | ||
1295 | /* If this request hasn't been cancelled, do nothing */ | |
1296 | if (data->cancelled == 0) | |
1297 | goto out_free; | |
1298 | /* In case of error, no cleanup! */ | |
1299 | if (data->rpc_status != 0 || !data->rpc_done) | |
1300 | goto out_free; | |
1301 | /* In case we need an open_confirm, no cleanup! */ | |
1302 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1303 | goto out_free; | |
1304 | state = nfs4_opendata_to_nfs4_state(data); | |
1305 | if (!IS_ERR(state)) | |
1306 | nfs4_close_state(&data->path, state, data->o_arg.fmode); | |
1307 | out_free: | |
1308 | nfs4_opendata_put(data); | |
1309 | } | |
1310 | ||
1311 | static const struct rpc_call_ops nfs4_open_ops = { | |
1312 | .rpc_call_prepare = nfs4_open_prepare, | |
1313 | .rpc_call_done = nfs4_open_done, | |
1314 | .rpc_release = nfs4_open_release, | |
1315 | }; | |
1316 | ||
1317 | /* | |
1318 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1319 | */ | |
1320 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1321 | { | |
1322 | struct inode *dir = data->dir->d_inode; | |
1323 | struct nfs_server *server = NFS_SERVER(dir); | |
1324 | struct nfs_openargs *o_arg = &data->o_arg; | |
1325 | struct nfs_openres *o_res = &data->o_res; | |
1326 | struct rpc_task *task; | |
1327 | struct rpc_message msg = { | |
1328 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1329 | .rpc_argp = o_arg, | |
1330 | .rpc_resp = o_res, | |
1331 | .rpc_cred = data->owner->so_cred, | |
1332 | }; | |
1333 | struct rpc_task_setup task_setup_data = { | |
1334 | .rpc_client = server->client, | |
1335 | .rpc_message = &msg, | |
1336 | .callback_ops = &nfs4_open_ops, | |
1337 | .callback_data = data, | |
1338 | .workqueue = nfsiod_workqueue, | |
1339 | .flags = RPC_TASK_ASYNC, | |
1340 | }; | |
1341 | int status; | |
1342 | ||
1343 | kref_get(&data->kref); | |
1344 | data->rpc_done = 0; | |
1345 | data->rpc_status = 0; | |
1346 | data->cancelled = 0; | |
1347 | task = rpc_run_task(&task_setup_data); | |
1348 | if (IS_ERR(task)) | |
1349 | return PTR_ERR(task); | |
1350 | status = nfs4_wait_for_completion_rpc_task(task); | |
1351 | if (status != 0) { | |
1352 | data->cancelled = 1; | |
1353 | smp_wmb(); | |
1354 | } else | |
1355 | status = data->rpc_status; | |
1356 | rpc_put_task(task); | |
1357 | if (status != 0 || !data->rpc_done) | |
1358 | return status; | |
1359 | ||
1360 | if (o_res->fh.size == 0) | |
1361 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1362 | ||
1363 | if (o_arg->open_flags & O_CREAT) { | |
1364 | update_changeattr(dir, &o_res->cinfo); | |
1365 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1366 | } else | |
1367 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1368 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1369 | status = _nfs4_proc_open_confirm(data); | |
1370 | if (status != 0) | |
1371 | return status; | |
1372 | } | |
1373 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
1374 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static int nfs4_recover_expired_lease(struct nfs_server *server) | |
1379 | { | |
1380 | struct nfs_client *clp = server->nfs_client; | |
1381 | int ret; | |
1382 | ||
1383 | for (;;) { | |
1384 | ret = nfs4_wait_clnt_recover(clp); | |
1385 | if (ret != 0) | |
1386 | return ret; | |
1387 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1388 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1389 | break; | |
1390 | nfs4_schedule_state_recovery(clp); | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * OPEN_EXPIRED: | |
1397 | * reclaim state on the server after a network partition. | |
1398 | * Assumes caller holds the appropriate lock | |
1399 | */ | |
1400 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1401 | { | |
1402 | struct nfs4_opendata *opendata; | |
1403 | int ret; | |
1404 | ||
1405 | opendata = nfs4_open_recoverdata_alloc(ctx, state); | |
1406 | if (IS_ERR(opendata)) | |
1407 | return PTR_ERR(opendata); | |
1408 | ret = nfs4_open_recover(opendata, state); | |
1409 | if (ret == -ESTALE) | |
1410 | d_drop(ctx->path.dentry); | |
1411 | nfs4_opendata_put(opendata); | |
1412 | return ret; | |
1413 | } | |
1414 | ||
1415 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) | |
1416 | { | |
1417 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1418 | struct nfs4_exception exception = { }; | |
1419 | int err; | |
1420 | ||
1421 | do { | |
1422 | err = _nfs4_open_expired(ctx, state); | |
1423 | if (err != -NFS4ERR_DELAY) | |
1424 | break; | |
1425 | nfs4_handle_exception(server, err, &exception); | |
1426 | } while (exception.retry); | |
1427 | return err; | |
1428 | } | |
1429 | ||
1430 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1431 | { | |
1432 | struct nfs_open_context *ctx; | |
1433 | int ret; | |
1434 | ||
1435 | ctx = nfs4_state_find_open_context(state); | |
1436 | if (IS_ERR(ctx)) | |
1437 | return PTR_ERR(ctx); | |
1438 | ret = nfs4_do_open_expired(ctx, state); | |
1439 | put_nfs_open_context(ctx); | |
1440 | return ret; | |
1441 | } | |
1442 | ||
1443 | /* | |
1444 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1445 | * fields corresponding to attributes that were used to store the verifier. | |
1446 | * Make sure we clobber those fields in the later setattr call | |
1447 | */ | |
1448 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1449 | { | |
1450 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1451 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1452 | sattr->ia_valid |= ATTR_ATIME; | |
1453 | ||
1454 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1455 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1456 | sattr->ia_valid |= ATTR_MTIME; | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * Returns a referenced nfs4_state | |
1461 | */ | |
1462 | static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) | |
1463 | { | |
1464 | struct nfs4_state_owner *sp; | |
1465 | struct nfs4_state *state = NULL; | |
1466 | struct nfs_server *server = NFS_SERVER(dir); | |
1467 | struct nfs4_opendata *opendata; | |
1468 | int status; | |
1469 | ||
1470 | /* Protect against reboot recovery conflicts */ | |
1471 | status = -ENOMEM; | |
1472 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1473 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1474 | goto out_err; | |
1475 | } | |
1476 | status = nfs4_recover_expired_lease(server); | |
1477 | if (status != 0) | |
1478 | goto err_put_state_owner; | |
1479 | if (path->dentry->d_inode != NULL) | |
1480 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); | |
1481 | status = -ENOMEM; | |
1482 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); | |
1483 | if (opendata == NULL) | |
1484 | goto err_put_state_owner; | |
1485 | ||
1486 | if (path->dentry->d_inode != NULL) | |
1487 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1488 | ||
1489 | status = _nfs4_proc_open(opendata); | |
1490 | if (status != 0) | |
1491 | goto err_opendata_put; | |
1492 | ||
1493 | if (opendata->o_arg.open_flags & O_EXCL) | |
1494 | nfs4_exclusive_attrset(opendata, sattr); | |
1495 | ||
1496 | state = nfs4_opendata_to_nfs4_state(opendata); | |
1497 | status = PTR_ERR(state); | |
1498 | if (IS_ERR(state)) | |
1499 | goto err_opendata_put; | |
1500 | nfs4_opendata_put(opendata); | |
1501 | nfs4_put_state_owner(sp); | |
1502 | *res = state; | |
1503 | return 0; | |
1504 | err_opendata_put: | |
1505 | nfs4_opendata_put(opendata); | |
1506 | err_put_state_owner: | |
1507 | nfs4_put_state_owner(sp); | |
1508 | out_err: | |
1509 | *res = NULL; | |
1510 | return status; | |
1511 | } | |
1512 | ||
1513 | ||
1514 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) | |
1515 | { | |
1516 | struct nfs4_exception exception = { }; | |
1517 | struct nfs4_state *res; | |
1518 | int status; | |
1519 | ||
1520 | do { | |
1521 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); | |
1522 | if (status == 0) | |
1523 | break; | |
1524 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1525 | * book-keeping w.r.t. state-changing operations | |
1526 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1527 | * It is actually a sign of a bug on the client or on the server. | |
1528 | * | |
1529 | * If we receive a BAD_SEQID error in the particular case of | |
1530 | * doing an OPEN, we assume that nfs_increment_open_seqid() will | |
1531 | * have unhashed the old state_owner for us, and that we can | |
1532 | * therefore safely retry using a new one. We should still warn | |
1533 | * the user though... | |
1534 | */ | |
1535 | if (status == -NFS4ERR_BAD_SEQID) { | |
1536 | printk(KERN_WARNING "NFS: v4 server %s " | |
1537 | " returned a bad sequence-id error!\n", | |
1538 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1539 | exception.retry = 1; | |
1540 | continue; | |
1541 | } | |
1542 | /* | |
1543 | * BAD_STATEID on OPEN means that the server cancelled our | |
1544 | * state before it received the OPEN_CONFIRM. | |
1545 | * Recover by retrying the request as per the discussion | |
1546 | * on Page 181 of RFC3530. | |
1547 | */ | |
1548 | if (status == -NFS4ERR_BAD_STATEID) { | |
1549 | exception.retry = 1; | |
1550 | continue; | |
1551 | } | |
1552 | if (status == -EAGAIN) { | |
1553 | /* We must have found a delegation */ | |
1554 | exception.retry = 1; | |
1555 | continue; | |
1556 | } | |
1557 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), | |
1558 | status, &exception)); | |
1559 | } while (exception.retry); | |
1560 | return res; | |
1561 | } | |
1562 | ||
1563 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
1564 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1565 | struct nfs4_state *state) | |
1566 | { | |
1567 | struct nfs_server *server = NFS_SERVER(inode); | |
1568 | struct nfs_setattrargs arg = { | |
1569 | .fh = NFS_FH(inode), | |
1570 | .iap = sattr, | |
1571 | .server = server, | |
1572 | .bitmask = server->attr_bitmask, | |
1573 | }; | |
1574 | struct nfs_setattrres res = { | |
1575 | .fattr = fattr, | |
1576 | .server = server, | |
1577 | }; | |
1578 | struct rpc_message msg = { | |
1579 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], | |
1580 | .rpc_argp = &arg, | |
1581 | .rpc_resp = &res, | |
1582 | .rpc_cred = cred, | |
1583 | }; | |
1584 | unsigned long timestamp = jiffies; | |
1585 | int status; | |
1586 | ||
1587 | nfs_fattr_init(fattr); | |
1588 | ||
1589 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { | |
1590 | /* Use that stateid */ | |
1591 | } else if (state != NULL) { | |
1592 | nfs4_copy_stateid(&arg.stateid, state, current->files); | |
1593 | } else | |
1594 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); | |
1595 | ||
1596 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); | |
1597 | if (status == 0 && state != NULL) | |
1598 | renew_lease(server, timestamp); | |
1599 | return status; | |
1600 | } | |
1601 | ||
1602 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, | |
1603 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1604 | struct nfs4_state *state) | |
1605 | { | |
1606 | struct nfs_server *server = NFS_SERVER(inode); | |
1607 | struct nfs4_exception exception = { }; | |
1608 | int err; | |
1609 | do { | |
1610 | err = nfs4_handle_exception(server, | |
1611 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), | |
1612 | &exception); | |
1613 | } while (exception.retry); | |
1614 | return err; | |
1615 | } | |
1616 | ||
1617 | struct nfs4_closedata { | |
1618 | struct path path; | |
1619 | struct inode *inode; | |
1620 | struct nfs4_state *state; | |
1621 | struct nfs_closeargs arg; | |
1622 | struct nfs_closeres res; | |
1623 | struct nfs_fattr fattr; | |
1624 | unsigned long timestamp; | |
1625 | }; | |
1626 | ||
1627 | static void nfs4_free_closedata(void *data) | |
1628 | { | |
1629 | struct nfs4_closedata *calldata = data; | |
1630 | struct nfs4_state_owner *sp = calldata->state->owner; | |
1631 | ||
1632 | nfs4_put_open_state(calldata->state); | |
1633 | nfs_free_seqid(calldata->arg.seqid); | |
1634 | nfs4_put_state_owner(sp); | |
1635 | path_put(&calldata->path); | |
1636 | kfree(calldata); | |
1637 | } | |
1638 | ||
1639 | static void nfs4_close_done(struct rpc_task *task, void *data) | |
1640 | { | |
1641 | struct nfs4_closedata *calldata = data; | |
1642 | struct nfs4_state *state = calldata->state; | |
1643 | struct nfs_server *server = NFS_SERVER(calldata->inode); | |
1644 | ||
1645 | nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); | |
1646 | if (RPC_ASSASSINATED(task)) | |
1647 | return; | |
1648 | /* hmm. we are done with the inode, and in the process of freeing | |
1649 | * the state_owner. we keep this around to process errors | |
1650 | */ | |
1651 | switch (task->tk_status) { | |
1652 | case 0: | |
1653 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); | |
1654 | renew_lease(server, calldata->timestamp); | |
1655 | break; | |
1656 | case -NFS4ERR_STALE_STATEID: | |
1657 | case -NFS4ERR_OLD_STATEID: | |
1658 | case -NFS4ERR_BAD_STATEID: | |
1659 | case -NFS4ERR_EXPIRED: | |
1660 | if (calldata->arg.fmode == 0) | |
1661 | break; | |
1662 | default: | |
1663 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { | |
1664 | rpc_restart_call(task); | |
1665 | return; | |
1666 | } | |
1667 | } | |
1668 | nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res); | |
1669 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); | |
1670 | } | |
1671 | ||
1672 | static void nfs4_close_prepare(struct rpc_task *task, void *data) | |
1673 | { | |
1674 | struct nfs4_closedata *calldata = data; | |
1675 | struct nfs4_state *state = calldata->state; | |
1676 | int clear_rd, clear_wr, clear_rdwr; | |
1677 | ||
1678 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
1679 | return; | |
1680 | ||
1681 | clear_rd = clear_wr = clear_rdwr = 0; | |
1682 | spin_lock(&state->owner->so_lock); | |
1683 | /* Calculate the change in open mode */ | |
1684 | if (state->n_rdwr == 0) { | |
1685 | if (state->n_rdonly == 0) { | |
1686 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1687 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1688 | } | |
1689 | if (state->n_wronly == 0) { | |
1690 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1691 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1692 | } | |
1693 | } | |
1694 | spin_unlock(&state->owner->so_lock); | |
1695 | if (!clear_rd && !clear_wr && !clear_rdwr) { | |
1696 | /* Note: exit _without_ calling nfs4_close_done */ | |
1697 | task->tk_action = NULL; | |
1698 | return; | |
1699 | } | |
1700 | nfs_fattr_init(calldata->res.fattr); | |
1701 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { | |
1702 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; | |
1703 | calldata->arg.fmode = FMODE_READ; | |
1704 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { | |
1705 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; | |
1706 | calldata->arg.fmode = FMODE_WRITE; | |
1707 | } | |
1708 | calldata->timestamp = jiffies; | |
1709 | if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client, | |
1710 | &calldata->arg.seq_args, &calldata->res.seq_res, | |
1711 | 1, task)) | |
1712 | return; | |
1713 | rpc_call_start(task); | |
1714 | } | |
1715 | ||
1716 | static const struct rpc_call_ops nfs4_close_ops = { | |
1717 | .rpc_call_prepare = nfs4_close_prepare, | |
1718 | .rpc_call_done = nfs4_close_done, | |
1719 | .rpc_release = nfs4_free_closedata, | |
1720 | }; | |
1721 | ||
1722 | /* | |
1723 | * It is possible for data to be read/written from a mem-mapped file | |
1724 | * after the sys_close call (which hits the vfs layer as a flush). | |
1725 | * This means that we can't safely call nfsv4 close on a file until | |
1726 | * the inode is cleared. This in turn means that we are not good | |
1727 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1728 | * share state even when we are done with one of the three share | |
1729 | * stateid's in the inode. | |
1730 | * | |
1731 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1732 | */ | |
1733 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) | |
1734 | { | |
1735 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1736 | struct nfs4_closedata *calldata; | |
1737 | struct nfs4_state_owner *sp = state->owner; | |
1738 | struct rpc_task *task; | |
1739 | struct rpc_message msg = { | |
1740 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1741 | .rpc_cred = state->owner->so_cred, | |
1742 | }; | |
1743 | struct rpc_task_setup task_setup_data = { | |
1744 | .rpc_client = server->client, | |
1745 | .rpc_message = &msg, | |
1746 | .callback_ops = &nfs4_close_ops, | |
1747 | .workqueue = nfsiod_workqueue, | |
1748 | .flags = RPC_TASK_ASYNC, | |
1749 | }; | |
1750 | int status = -ENOMEM; | |
1751 | ||
1752 | calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); | |
1753 | if (calldata == NULL) | |
1754 | goto out; | |
1755 | calldata->inode = state->inode; | |
1756 | calldata->state = state; | |
1757 | calldata->arg.fh = NFS_FH(state->inode); | |
1758 | calldata->arg.stateid = &state->open_stateid; | |
1759 | /* Serialization for the sequence id */ | |
1760 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); | |
1761 | if (calldata->arg.seqid == NULL) | |
1762 | goto out_free_calldata; | |
1763 | calldata->arg.fmode = 0; | |
1764 | calldata->arg.bitmask = server->cache_consistency_bitmask; | |
1765 | calldata->res.fattr = &calldata->fattr; | |
1766 | calldata->res.seqid = calldata->arg.seqid; | |
1767 | calldata->res.server = server; | |
1768 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
1769 | calldata->path.mnt = mntget(path->mnt); | |
1770 | calldata->path.dentry = dget(path->dentry); | |
1771 | ||
1772 | msg.rpc_argp = &calldata->arg, | |
1773 | msg.rpc_resp = &calldata->res, | |
1774 | task_setup_data.callback_data = calldata; | |
1775 | task = rpc_run_task(&task_setup_data); | |
1776 | if (IS_ERR(task)) | |
1777 | return PTR_ERR(task); | |
1778 | status = 0; | |
1779 | if (wait) | |
1780 | status = rpc_wait_for_completion_task(task); | |
1781 | rpc_put_task(task); | |
1782 | return status; | |
1783 | out_free_calldata: | |
1784 | kfree(calldata); | |
1785 | out: | |
1786 | nfs4_put_open_state(state); | |
1787 | nfs4_put_state_owner(sp); | |
1788 | return status; | |
1789 | } | |
1790 | ||
1791 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) | |
1792 | { | |
1793 | struct file *filp; | |
1794 | int ret; | |
1795 | ||
1796 | /* If the open_intent is for execute, we have an extra check to make */ | |
1797 | if (fmode & FMODE_EXEC) { | |
1798 | ret = nfs_may_open(state->inode, | |
1799 | state->owner->so_cred, | |
1800 | nd->intent.open.flags); | |
1801 | if (ret < 0) | |
1802 | goto out_close; | |
1803 | } | |
1804 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); | |
1805 | if (!IS_ERR(filp)) { | |
1806 | struct nfs_open_context *ctx; | |
1807 | ctx = nfs_file_open_context(filp); | |
1808 | ctx->state = state; | |
1809 | return 0; | |
1810 | } | |
1811 | ret = PTR_ERR(filp); | |
1812 | out_close: | |
1813 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); | |
1814 | return ret; | |
1815 | } | |
1816 | ||
1817 | struct dentry * | |
1818 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) | |
1819 | { | |
1820 | struct path path = { | |
1821 | .mnt = nd->path.mnt, | |
1822 | .dentry = dentry, | |
1823 | }; | |
1824 | struct dentry *parent; | |
1825 | struct iattr attr; | |
1826 | struct rpc_cred *cred; | |
1827 | struct nfs4_state *state; | |
1828 | struct dentry *res; | |
1829 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); | |
1830 | ||
1831 | if (nd->flags & LOOKUP_CREATE) { | |
1832 | attr.ia_mode = nd->intent.open.create_mode; | |
1833 | attr.ia_valid = ATTR_MODE; | |
1834 | if (!IS_POSIXACL(dir)) | |
1835 | attr.ia_mode &= ~current_umask(); | |
1836 | } else { | |
1837 | attr.ia_valid = 0; | |
1838 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1839 | } | |
1840 | ||
1841 | cred = rpc_lookup_cred(); | |
1842 | if (IS_ERR(cred)) | |
1843 | return (struct dentry *)cred; | |
1844 | parent = dentry->d_parent; | |
1845 | /* Protect against concurrent sillydeletes */ | |
1846 | nfs_block_sillyrename(parent); | |
1847 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); | |
1848 | put_rpccred(cred); | |
1849 | if (IS_ERR(state)) { | |
1850 | if (PTR_ERR(state) == -ENOENT) { | |
1851 | d_add(dentry, NULL); | |
1852 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
1853 | } | |
1854 | nfs_unblock_sillyrename(parent); | |
1855 | return (struct dentry *)state; | |
1856 | } | |
1857 | res = d_add_unique(dentry, igrab(state->inode)); | |
1858 | if (res != NULL) | |
1859 | path.dentry = res; | |
1860 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); | |
1861 | nfs_unblock_sillyrename(parent); | |
1862 | nfs4_intent_set_file(nd, &path, state, fmode); | |
1863 | return res; | |
1864 | } | |
1865 | ||
1866 | int | |
1867 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) | |
1868 | { | |
1869 | struct path path = { | |
1870 | .mnt = nd->path.mnt, | |
1871 | .dentry = dentry, | |
1872 | }; | |
1873 | struct rpc_cred *cred; | |
1874 | struct nfs4_state *state; | |
1875 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); | |
1876 | ||
1877 | cred = rpc_lookup_cred(); | |
1878 | if (IS_ERR(cred)) | |
1879 | return PTR_ERR(cred); | |
1880 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); | |
1881 | put_rpccred(cred); | |
1882 | if (IS_ERR(state)) { | |
1883 | switch (PTR_ERR(state)) { | |
1884 | case -EPERM: | |
1885 | case -EACCES: | |
1886 | case -EDQUOT: | |
1887 | case -ENOSPC: | |
1888 | case -EROFS: | |
1889 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1890 | return 1; | |
1891 | default: | |
1892 | goto out_drop; | |
1893 | } | |
1894 | } | |
1895 | if (state->inode == dentry->d_inode) { | |
1896 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
1897 | nfs4_intent_set_file(nd, &path, state, fmode); | |
1898 | return 1; | |
1899 | } | |
1900 | nfs4_close_sync(&path, state, fmode); | |
1901 | out_drop: | |
1902 | d_drop(dentry); | |
1903 | return 0; | |
1904 | } | |
1905 | ||
1906 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) | |
1907 | { | |
1908 | if (ctx->state == NULL) | |
1909 | return; | |
1910 | if (is_sync) | |
1911 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1912 | else | |
1913 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1914 | } | |
1915 | ||
1916 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1917 | { | |
1918 | struct nfs4_server_caps_arg args = { | |
1919 | .fhandle = fhandle, | |
1920 | }; | |
1921 | struct nfs4_server_caps_res res = {}; | |
1922 | struct rpc_message msg = { | |
1923 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
1924 | .rpc_argp = &args, | |
1925 | .rpc_resp = &res, | |
1926 | }; | |
1927 | int status; | |
1928 | ||
1929 | status = nfs4_call_sync(server, &msg, &args, &res, 0); | |
1930 | if (status == 0) { | |
1931 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1932 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1933 | server->caps |= NFS_CAP_ACLS; | |
1934 | if (res.has_links != 0) | |
1935 | server->caps |= NFS_CAP_HARDLINKS; | |
1936 | if (res.has_symlinks != 0) | |
1937 | server->caps |= NFS_CAP_SYMLINKS; | |
1938 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); | |
1939 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1940 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1941 | server->acl_bitmask = res.acl_bitmask; | |
1942 | } | |
1943 | ||
1944 | return status; | |
1945 | } | |
1946 | ||
1947 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1948 | { | |
1949 | struct nfs4_exception exception = { }; | |
1950 | int err; | |
1951 | do { | |
1952 | err = nfs4_handle_exception(server, | |
1953 | _nfs4_server_capabilities(server, fhandle), | |
1954 | &exception); | |
1955 | } while (exception.retry); | |
1956 | return err; | |
1957 | } | |
1958 | ||
1959 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1960 | struct nfs_fsinfo *info) | |
1961 | { | |
1962 | struct nfs4_lookup_root_arg args = { | |
1963 | .bitmask = nfs4_fattr_bitmap, | |
1964 | }; | |
1965 | struct nfs4_lookup_res res = { | |
1966 | .server = server, | |
1967 | .fattr = info->fattr, | |
1968 | .fh = fhandle, | |
1969 | }; | |
1970 | struct rpc_message msg = { | |
1971 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1972 | .rpc_argp = &args, | |
1973 | .rpc_resp = &res, | |
1974 | }; | |
1975 | nfs_fattr_init(info->fattr); | |
1976 | return nfs4_call_sync(server, &msg, &args, &res, 0); | |
1977 | } | |
1978 | ||
1979 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1980 | struct nfs_fsinfo *info) | |
1981 | { | |
1982 | struct nfs4_exception exception = { }; | |
1983 | int err; | |
1984 | do { | |
1985 | err = nfs4_handle_exception(server, | |
1986 | _nfs4_lookup_root(server, fhandle, info), | |
1987 | &exception); | |
1988 | } while (exception.retry); | |
1989 | return err; | |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * get the file handle for the "/" directory on the server | |
1994 | */ | |
1995 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1996 | struct nfs_fsinfo *info) | |
1997 | { | |
1998 | int status; | |
1999 | ||
2000 | status = nfs4_lookup_root(server, fhandle, info); | |
2001 | if (status == 0) | |
2002 | status = nfs4_server_capabilities(server, fhandle); | |
2003 | if (status == 0) | |
2004 | status = nfs4_do_fsinfo(server, fhandle, info); | |
2005 | return nfs4_map_errors(status); | |
2006 | } | |
2007 | ||
2008 | /* | |
2009 | * Get locations and (maybe) other attributes of a referral. | |
2010 | * Note that we'll actually follow the referral later when | |
2011 | * we detect fsid mismatch in inode revalidation | |
2012 | */ | |
2013 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) | |
2014 | { | |
2015 | int status = -ENOMEM; | |
2016 | struct page *page = NULL; | |
2017 | struct nfs4_fs_locations *locations = NULL; | |
2018 | ||
2019 | page = alloc_page(GFP_KERNEL); | |
2020 | if (page == NULL) | |
2021 | goto out; | |
2022 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2023 | if (locations == NULL) | |
2024 | goto out; | |
2025 | ||
2026 | status = nfs4_proc_fs_locations(dir, name, locations, page); | |
2027 | if (status != 0) | |
2028 | goto out; | |
2029 | /* Make sure server returned a different fsid for the referral */ | |
2030 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
2031 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); | |
2032 | status = -EIO; | |
2033 | goto out; | |
2034 | } | |
2035 | ||
2036 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2037 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2038 | if (!fattr->mode) | |
2039 | fattr->mode = S_IFDIR; | |
2040 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2041 | out: | |
2042 | if (page) | |
2043 | __free_page(page); | |
2044 | if (locations) | |
2045 | kfree(locations); | |
2046 | return status; | |
2047 | } | |
2048 | ||
2049 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2050 | { | |
2051 | struct nfs4_getattr_arg args = { | |
2052 | .fh = fhandle, | |
2053 | .bitmask = server->attr_bitmask, | |
2054 | }; | |
2055 | struct nfs4_getattr_res res = { | |
2056 | .fattr = fattr, | |
2057 | .server = server, | |
2058 | }; | |
2059 | struct rpc_message msg = { | |
2060 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2061 | .rpc_argp = &args, | |
2062 | .rpc_resp = &res, | |
2063 | }; | |
2064 | ||
2065 | nfs_fattr_init(fattr); | |
2066 | return nfs4_call_sync(server, &msg, &args, &res, 0); | |
2067 | } | |
2068 | ||
2069 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2070 | { | |
2071 | struct nfs4_exception exception = { }; | |
2072 | int err; | |
2073 | do { | |
2074 | err = nfs4_handle_exception(server, | |
2075 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2076 | &exception); | |
2077 | } while (exception.retry); | |
2078 | return err; | |
2079 | } | |
2080 | ||
2081 | /* | |
2082 | * The file is not closed if it is opened due to the a request to change | |
2083 | * the size of the file. The open call will not be needed once the | |
2084 | * VFS layer lookup-intents are implemented. | |
2085 | * | |
2086 | * Close is called when the inode is destroyed. | |
2087 | * If we haven't opened the file for O_WRONLY, we | |
2088 | * need to in the size_change case to obtain a stateid. | |
2089 | * | |
2090 | * Got race? | |
2091 | * Because OPEN is always done by name in nfsv4, it is | |
2092 | * possible that we opened a different file by the same | |
2093 | * name. We can recognize this race condition, but we | |
2094 | * can't do anything about it besides returning an error. | |
2095 | * | |
2096 | * This will be fixed with VFS changes (lookup-intent). | |
2097 | */ | |
2098 | static int | |
2099 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2100 | struct iattr *sattr) | |
2101 | { | |
2102 | struct inode *inode = dentry->d_inode; | |
2103 | struct rpc_cred *cred = NULL; | |
2104 | struct nfs4_state *state = NULL; | |
2105 | int status; | |
2106 | ||
2107 | nfs_fattr_init(fattr); | |
2108 | ||
2109 | /* Search for an existing open(O_WRITE) file */ | |
2110 | if (sattr->ia_valid & ATTR_FILE) { | |
2111 | struct nfs_open_context *ctx; | |
2112 | ||
2113 | ctx = nfs_file_open_context(sattr->ia_file); | |
2114 | if (ctx) { | |
2115 | cred = ctx->cred; | |
2116 | state = ctx->state; | |
2117 | } | |
2118 | } | |
2119 | ||
2120 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); | |
2121 | if (status == 0) | |
2122 | nfs_setattr_update_inode(inode, sattr); | |
2123 | return status; | |
2124 | } | |
2125 | ||
2126 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, | |
2127 | const struct qstr *name, struct nfs_fh *fhandle, | |
2128 | struct nfs_fattr *fattr) | |
2129 | { | |
2130 | int status; | |
2131 | struct nfs4_lookup_arg args = { | |
2132 | .bitmask = server->attr_bitmask, | |
2133 | .dir_fh = dirfh, | |
2134 | .name = name, | |
2135 | }; | |
2136 | struct nfs4_lookup_res res = { | |
2137 | .server = server, | |
2138 | .fattr = fattr, | |
2139 | .fh = fhandle, | |
2140 | }; | |
2141 | struct rpc_message msg = { | |
2142 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2143 | .rpc_argp = &args, | |
2144 | .rpc_resp = &res, | |
2145 | }; | |
2146 | ||
2147 | nfs_fattr_init(fattr); | |
2148 | ||
2149 | dprintk("NFS call lookupfh %s\n", name->name); | |
2150 | status = nfs4_call_sync(server, &msg, &args, &res, 0); | |
2151 | dprintk("NFS reply lookupfh: %d\n", status); | |
2152 | return status; | |
2153 | } | |
2154 | ||
2155 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2156 | struct qstr *name, struct nfs_fh *fhandle, | |
2157 | struct nfs_fattr *fattr) | |
2158 | { | |
2159 | struct nfs4_exception exception = { }; | |
2160 | int err; | |
2161 | do { | |
2162 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); | |
2163 | /* FIXME: !!!! */ | |
2164 | if (err == -NFS4ERR_MOVED) { | |
2165 | err = -EREMOTE; | |
2166 | break; | |
2167 | } | |
2168 | err = nfs4_handle_exception(server, err, &exception); | |
2169 | } while (exception.retry); | |
2170 | return err; | |
2171 | } | |
2172 | ||
2173 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, | |
2174 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2175 | { | |
2176 | int status; | |
2177 | ||
2178 | dprintk("NFS call lookup %s\n", name->name); | |
2179 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); | |
2180 | if (status == -NFS4ERR_MOVED) | |
2181 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
2182 | dprintk("NFS reply lookup: %d\n", status); | |
2183 | return status; | |
2184 | } | |
2185 | ||
2186 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2187 | { | |
2188 | struct nfs4_exception exception = { }; | |
2189 | int err; | |
2190 | do { | |
2191 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2192 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2193 | &exception); | |
2194 | } while (exception.retry); | |
2195 | return err; | |
2196 | } | |
2197 | ||
2198 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2199 | { | |
2200 | struct nfs_server *server = NFS_SERVER(inode); | |
2201 | struct nfs_fattr fattr; | |
2202 | struct nfs4_accessargs args = { | |
2203 | .fh = NFS_FH(inode), | |
2204 | .bitmask = server->attr_bitmask, | |
2205 | }; | |
2206 | struct nfs4_accessres res = { | |
2207 | .server = server, | |
2208 | .fattr = &fattr, | |
2209 | }; | |
2210 | struct rpc_message msg = { | |
2211 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2212 | .rpc_argp = &args, | |
2213 | .rpc_resp = &res, | |
2214 | .rpc_cred = entry->cred, | |
2215 | }; | |
2216 | int mode = entry->mask; | |
2217 | int status; | |
2218 | ||
2219 | /* | |
2220 | * Determine which access bits we want to ask for... | |
2221 | */ | |
2222 | if (mode & MAY_READ) | |
2223 | args.access |= NFS4_ACCESS_READ; | |
2224 | if (S_ISDIR(inode->i_mode)) { | |
2225 | if (mode & MAY_WRITE) | |
2226 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2227 | if (mode & MAY_EXEC) | |
2228 | args.access |= NFS4_ACCESS_LOOKUP; | |
2229 | } else { | |
2230 | if (mode & MAY_WRITE) | |
2231 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2232 | if (mode & MAY_EXEC) | |
2233 | args.access |= NFS4_ACCESS_EXECUTE; | |
2234 | } | |
2235 | nfs_fattr_init(&fattr); | |
2236 | status = nfs4_call_sync(server, &msg, &args, &res, 0); | |
2237 | if (!status) { | |
2238 | entry->mask = 0; | |
2239 | if (res.access & NFS4_ACCESS_READ) | |
2240 | entry->mask |= MAY_READ; | |
2241 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2242 | entry->mask |= MAY_WRITE; | |
2243 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2244 | entry->mask |= MAY_EXEC; | |
2245 | nfs_refresh_inode(inode, &fattr); | |
2246 | } | |
2247 | return status; | |
2248 | } | |
2249 | ||
2250 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2251 | { | |
2252 | struct nfs4_exception exception = { }; | |
2253 | int err; | |
2254 | do { | |
2255 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2256 | _nfs4_proc_access(inode, entry), | |
2257 | &exception); | |
2258 | } while (exception.retry); | |
2259 | return err; | |
2260 | } | |
2261 | ||
2262 | /* | |
2263 | * TODO: For the time being, we don't try to get any attributes | |
2264 | * along with any of the zero-copy operations READ, READDIR, | |
2265 | * READLINK, WRITE. | |
2266 | * | |
2267 | * In the case of the first three, we want to put the GETATTR | |
2268 | * after the read-type operation -- this is because it is hard | |
2269 | * to predict the length of a GETATTR response in v4, and thus | |
2270 | * align the READ data correctly. This means that the GETATTR | |
2271 | * may end up partially falling into the page cache, and we should | |
2272 | * shift it into the 'tail' of the xdr_buf before processing. | |
2273 | * To do this efficiently, we need to know the total length | |
2274 | * of data received, which doesn't seem to be available outside | |
2275 | * of the RPC layer. | |
2276 | * | |
2277 | * In the case of WRITE, we also want to put the GETATTR after | |
2278 | * the operation -- in this case because we want to make sure | |
2279 | * we get the post-operation mtime and size. This means that | |
2280 | * we can't use xdr_encode_pages() as written: we need a variant | |
2281 | * of it which would leave room in the 'tail' iovec. | |
2282 | * | |
2283 | * Both of these changes to the XDR layer would in fact be quite | |
2284 | * minor, but I decided to leave them for a subsequent patch. | |
2285 | */ | |
2286 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2287 | unsigned int pgbase, unsigned int pglen) | |
2288 | { | |
2289 | struct nfs4_readlink args = { | |
2290 | .fh = NFS_FH(inode), | |
2291 | .pgbase = pgbase, | |
2292 | .pglen = pglen, | |
2293 | .pages = &page, | |
2294 | }; | |
2295 | struct nfs4_readlink_res res; | |
2296 | struct rpc_message msg = { | |
2297 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2298 | .rpc_argp = &args, | |
2299 | .rpc_resp = &res, | |
2300 | }; | |
2301 | ||
2302 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); | |
2303 | } | |
2304 | ||
2305 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2306 | unsigned int pgbase, unsigned int pglen) | |
2307 | { | |
2308 | struct nfs4_exception exception = { }; | |
2309 | int err; | |
2310 | do { | |
2311 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2312 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2313 | &exception); | |
2314 | } while (exception.retry); | |
2315 | return err; | |
2316 | } | |
2317 | ||
2318 | /* | |
2319 | * Got race? | |
2320 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2321 | * Until then, this create/open method is prone to inefficiency and race | |
2322 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2323 | * placed on the wire. | |
2324 | * | |
2325 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2326 | * The file will be opened again in the subsequent VFS open call | |
2327 | * (nfs4_proc_file_open). | |
2328 | * | |
2329 | * The open for read will just hang around to be used by any process that | |
2330 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2331 | */ | |
2332 | ||
2333 | static int | |
2334 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
2335 | int flags, struct nameidata *nd) | |
2336 | { | |
2337 | struct path path = { | |
2338 | .mnt = nd->path.mnt, | |
2339 | .dentry = dentry, | |
2340 | }; | |
2341 | struct nfs4_state *state; | |
2342 | struct rpc_cred *cred; | |
2343 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); | |
2344 | int status = 0; | |
2345 | ||
2346 | cred = rpc_lookup_cred(); | |
2347 | if (IS_ERR(cred)) { | |
2348 | status = PTR_ERR(cred); | |
2349 | goto out; | |
2350 | } | |
2351 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); | |
2352 | d_drop(dentry); | |
2353 | if (IS_ERR(state)) { | |
2354 | status = PTR_ERR(state); | |
2355 | goto out_putcred; | |
2356 | } | |
2357 | d_add(dentry, igrab(state->inode)); | |
2358 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); | |
2359 | if (flags & O_EXCL) { | |
2360 | struct nfs_fattr fattr; | |
2361 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); | |
2362 | if (status == 0) | |
2363 | nfs_setattr_update_inode(state->inode, sattr); | |
2364 | nfs_post_op_update_inode(state->inode, &fattr); | |
2365 | } | |
2366 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) | |
2367 | status = nfs4_intent_set_file(nd, &path, state, fmode); | |
2368 | else | |
2369 | nfs4_close_sync(&path, state, fmode); | |
2370 | out_putcred: | |
2371 | put_rpccred(cred); | |
2372 | out: | |
2373 | return status; | |
2374 | } | |
2375 | ||
2376 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2377 | { | |
2378 | struct nfs_server *server = NFS_SERVER(dir); | |
2379 | struct nfs_removeargs args = { | |
2380 | .fh = NFS_FH(dir), | |
2381 | .name.len = name->len, | |
2382 | .name.name = name->name, | |
2383 | .bitmask = server->attr_bitmask, | |
2384 | }; | |
2385 | struct nfs_removeres res = { | |
2386 | .server = server, | |
2387 | }; | |
2388 | struct rpc_message msg = { | |
2389 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], | |
2390 | .rpc_argp = &args, | |
2391 | .rpc_resp = &res, | |
2392 | }; | |
2393 | int status; | |
2394 | ||
2395 | nfs_fattr_init(&res.dir_attr); | |
2396 | status = nfs4_call_sync(server, &msg, &args, &res, 1); | |
2397 | if (status == 0) { | |
2398 | update_changeattr(dir, &res.cinfo); | |
2399 | nfs_post_op_update_inode(dir, &res.dir_attr); | |
2400 | } | |
2401 | return status; | |
2402 | } | |
2403 | ||
2404 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2405 | { | |
2406 | struct nfs4_exception exception = { }; | |
2407 | int err; | |
2408 | do { | |
2409 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2410 | _nfs4_proc_remove(dir, name), | |
2411 | &exception); | |
2412 | } while (exception.retry); | |
2413 | return err; | |
2414 | } | |
2415 | ||
2416 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) | |
2417 | { | |
2418 | struct nfs_server *server = NFS_SERVER(dir); | |
2419 | struct nfs_removeargs *args = msg->rpc_argp; | |
2420 | struct nfs_removeres *res = msg->rpc_resp; | |
2421 | ||
2422 | args->bitmask = server->cache_consistency_bitmask; | |
2423 | res->server = server; | |
2424 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; | |
2425 | } | |
2426 | ||
2427 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) | |
2428 | { | |
2429 | struct nfs_removeres *res = task->tk_msg.rpc_resp; | |
2430 | ||
2431 | nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); | |
2432 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) | |
2433 | return 0; | |
2434 | nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res); | |
2435 | update_changeattr(dir, &res->cinfo); | |
2436 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2437 | return 1; | |
2438 | } | |
2439 | ||
2440 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2441 | struct inode *new_dir, struct qstr *new_name) | |
2442 | { | |
2443 | struct nfs_server *server = NFS_SERVER(old_dir); | |
2444 | struct nfs4_rename_arg arg = { | |
2445 | .old_dir = NFS_FH(old_dir), | |
2446 | .new_dir = NFS_FH(new_dir), | |
2447 | .old_name = old_name, | |
2448 | .new_name = new_name, | |
2449 | .bitmask = server->attr_bitmask, | |
2450 | }; | |
2451 | struct nfs_fattr old_fattr, new_fattr; | |
2452 | struct nfs4_rename_res res = { | |
2453 | .server = server, | |
2454 | .old_fattr = &old_fattr, | |
2455 | .new_fattr = &new_fattr, | |
2456 | }; | |
2457 | struct rpc_message msg = { | |
2458 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2459 | .rpc_argp = &arg, | |
2460 | .rpc_resp = &res, | |
2461 | }; | |
2462 | int status; | |
2463 | ||
2464 | nfs_fattr_init(res.old_fattr); | |
2465 | nfs_fattr_init(res.new_fattr); | |
2466 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); | |
2467 | ||
2468 | if (!status) { | |
2469 | update_changeattr(old_dir, &res.old_cinfo); | |
2470 | nfs_post_op_update_inode(old_dir, res.old_fattr); | |
2471 | update_changeattr(new_dir, &res.new_cinfo); | |
2472 | nfs_post_op_update_inode(new_dir, res.new_fattr); | |
2473 | } | |
2474 | return status; | |
2475 | } | |
2476 | ||
2477 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2478 | struct inode *new_dir, struct qstr *new_name) | |
2479 | { | |
2480 | struct nfs4_exception exception = { }; | |
2481 | int err; | |
2482 | do { | |
2483 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2484 | _nfs4_proc_rename(old_dir, old_name, | |
2485 | new_dir, new_name), | |
2486 | &exception); | |
2487 | } while (exception.retry); | |
2488 | return err; | |
2489 | } | |
2490 | ||
2491 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2492 | { | |
2493 | struct nfs_server *server = NFS_SERVER(inode); | |
2494 | struct nfs4_link_arg arg = { | |
2495 | .fh = NFS_FH(inode), | |
2496 | .dir_fh = NFS_FH(dir), | |
2497 | .name = name, | |
2498 | .bitmask = server->attr_bitmask, | |
2499 | }; | |
2500 | struct nfs_fattr fattr, dir_attr; | |
2501 | struct nfs4_link_res res = { | |
2502 | .server = server, | |
2503 | .fattr = &fattr, | |
2504 | .dir_attr = &dir_attr, | |
2505 | }; | |
2506 | struct rpc_message msg = { | |
2507 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2508 | .rpc_argp = &arg, | |
2509 | .rpc_resp = &res, | |
2510 | }; | |
2511 | int status; | |
2512 | ||
2513 | nfs_fattr_init(res.fattr); | |
2514 | nfs_fattr_init(res.dir_attr); | |
2515 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); | |
2516 | if (!status) { | |
2517 | update_changeattr(dir, &res.cinfo); | |
2518 | nfs_post_op_update_inode(dir, res.dir_attr); | |
2519 | nfs_post_op_update_inode(inode, res.fattr); | |
2520 | } | |
2521 | ||
2522 | return status; | |
2523 | } | |
2524 | ||
2525 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2526 | { | |
2527 | struct nfs4_exception exception = { }; | |
2528 | int err; | |
2529 | do { | |
2530 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2531 | _nfs4_proc_link(inode, dir, name), | |
2532 | &exception); | |
2533 | } while (exception.retry); | |
2534 | return err; | |
2535 | } | |
2536 | ||
2537 | struct nfs4_createdata { | |
2538 | struct rpc_message msg; | |
2539 | struct nfs4_create_arg arg; | |
2540 | struct nfs4_create_res res; | |
2541 | struct nfs_fh fh; | |
2542 | struct nfs_fattr fattr; | |
2543 | struct nfs_fattr dir_fattr; | |
2544 | }; | |
2545 | ||
2546 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2547 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2548 | { | |
2549 | struct nfs4_createdata *data; | |
2550 | ||
2551 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2552 | if (data != NULL) { | |
2553 | struct nfs_server *server = NFS_SERVER(dir); | |
2554 | ||
2555 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2556 | data->msg.rpc_argp = &data->arg; | |
2557 | data->msg.rpc_resp = &data->res; | |
2558 | data->arg.dir_fh = NFS_FH(dir); | |
2559 | data->arg.server = server; | |
2560 | data->arg.name = name; | |
2561 | data->arg.attrs = sattr; | |
2562 | data->arg.ftype = ftype; | |
2563 | data->arg.bitmask = server->attr_bitmask; | |
2564 | data->res.server = server; | |
2565 | data->res.fh = &data->fh; | |
2566 | data->res.fattr = &data->fattr; | |
2567 | data->res.dir_fattr = &data->dir_fattr; | |
2568 | nfs_fattr_init(data->res.fattr); | |
2569 | nfs_fattr_init(data->res.dir_fattr); | |
2570 | } | |
2571 | return data; | |
2572 | } | |
2573 | ||
2574 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2575 | { | |
2576 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, | |
2577 | &data->arg, &data->res, 1); | |
2578 | if (status == 0) { | |
2579 | update_changeattr(dir, &data->res.dir_cinfo); | |
2580 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2581 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2582 | } | |
2583 | return status; | |
2584 | } | |
2585 | ||
2586 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2587 | { | |
2588 | kfree(data); | |
2589 | } | |
2590 | ||
2591 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
2592 | struct page *page, unsigned int len, struct iattr *sattr) | |
2593 | { | |
2594 | struct nfs4_createdata *data; | |
2595 | int status = -ENAMETOOLONG; | |
2596 | ||
2597 | if (len > NFS4_MAXPATHLEN) | |
2598 | goto out; | |
2599 | ||
2600 | status = -ENOMEM; | |
2601 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2602 | if (data == NULL) | |
2603 | goto out; | |
2604 | ||
2605 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2606 | data->arg.u.symlink.pages = &page; | |
2607 | data->arg.u.symlink.len = len; | |
2608 | ||
2609 | status = nfs4_do_create(dir, dentry, data); | |
2610 | ||
2611 | nfs4_free_createdata(data); | |
2612 | out: | |
2613 | return status; | |
2614 | } | |
2615 | ||
2616 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, | |
2617 | struct page *page, unsigned int len, struct iattr *sattr) | |
2618 | { | |
2619 | struct nfs4_exception exception = { }; | |
2620 | int err; | |
2621 | do { | |
2622 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2623 | _nfs4_proc_symlink(dir, dentry, page, | |
2624 | len, sattr), | |
2625 | &exception); | |
2626 | } while (exception.retry); | |
2627 | return err; | |
2628 | } | |
2629 | ||
2630 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2631 | struct iattr *sattr) | |
2632 | { | |
2633 | struct nfs4_createdata *data; | |
2634 | int status = -ENOMEM; | |
2635 | ||
2636 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); | |
2637 | if (data == NULL) | |
2638 | goto out; | |
2639 | ||
2640 | status = nfs4_do_create(dir, dentry, data); | |
2641 | ||
2642 | nfs4_free_createdata(data); | |
2643 | out: | |
2644 | return status; | |
2645 | } | |
2646 | ||
2647 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2648 | struct iattr *sattr) | |
2649 | { | |
2650 | struct nfs4_exception exception = { }; | |
2651 | int err; | |
2652 | do { | |
2653 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2654 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2655 | &exception); | |
2656 | } while (exception.retry); | |
2657 | return err; | |
2658 | } | |
2659 | ||
2660 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2661 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2662 | { | |
2663 | struct inode *dir = dentry->d_inode; | |
2664 | struct nfs4_readdir_arg args = { | |
2665 | .fh = NFS_FH(dir), | |
2666 | .pages = &page, | |
2667 | .pgbase = 0, | |
2668 | .count = count, | |
2669 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, | |
2670 | }; | |
2671 | struct nfs4_readdir_res res; | |
2672 | struct rpc_message msg = { | |
2673 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2674 | .rpc_argp = &args, | |
2675 | .rpc_resp = &res, | |
2676 | .rpc_cred = cred, | |
2677 | }; | |
2678 | int status; | |
2679 | ||
2680 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, | |
2681 | dentry->d_parent->d_name.name, | |
2682 | dentry->d_name.name, | |
2683 | (unsigned long long)cookie); | |
2684 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); | |
2685 | res.pgbase = args.pgbase; | |
2686 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); | |
2687 | if (status == 0) | |
2688 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
2689 | ||
2690 | nfs_invalidate_atime(dir); | |
2691 | ||
2692 | dprintk("%s: returns %d\n", __func__, status); | |
2693 | return status; | |
2694 | } | |
2695 | ||
2696 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2697 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2698 | { | |
2699 | struct nfs4_exception exception = { }; | |
2700 | int err; | |
2701 | do { | |
2702 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2703 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2704 | page, count, plus), | |
2705 | &exception); | |
2706 | } while (exception.retry); | |
2707 | return err; | |
2708 | } | |
2709 | ||
2710 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2711 | struct iattr *sattr, dev_t rdev) | |
2712 | { | |
2713 | struct nfs4_createdata *data; | |
2714 | int mode = sattr->ia_mode; | |
2715 | int status = -ENOMEM; | |
2716 | ||
2717 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2718 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
2719 | ||
2720 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2721 | if (data == NULL) | |
2722 | goto out; | |
2723 | ||
2724 | if (S_ISFIFO(mode)) | |
2725 | data->arg.ftype = NF4FIFO; | |
2726 | else if (S_ISBLK(mode)) { | |
2727 | data->arg.ftype = NF4BLK; | |
2728 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2729 | data->arg.u.device.specdata2 = MINOR(rdev); | |
2730 | } | |
2731 | else if (S_ISCHR(mode)) { | |
2732 | data->arg.ftype = NF4CHR; | |
2733 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2734 | data->arg.u.device.specdata2 = MINOR(rdev); | |
2735 | } | |
2736 | ||
2737 | status = nfs4_do_create(dir, dentry, data); | |
2738 | ||
2739 | nfs4_free_createdata(data); | |
2740 | out: | |
2741 | return status; | |
2742 | } | |
2743 | ||
2744 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2745 | struct iattr *sattr, dev_t rdev) | |
2746 | { | |
2747 | struct nfs4_exception exception = { }; | |
2748 | int err; | |
2749 | do { | |
2750 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2751 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2752 | &exception); | |
2753 | } while (exception.retry); | |
2754 | return err; | |
2755 | } | |
2756 | ||
2757 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2758 | struct nfs_fsstat *fsstat) | |
2759 | { | |
2760 | struct nfs4_statfs_arg args = { | |
2761 | .fh = fhandle, | |
2762 | .bitmask = server->attr_bitmask, | |
2763 | }; | |
2764 | struct nfs4_statfs_res res = { | |
2765 | .fsstat = fsstat, | |
2766 | }; | |
2767 | struct rpc_message msg = { | |
2768 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2769 | .rpc_argp = &args, | |
2770 | .rpc_resp = &res, | |
2771 | }; | |
2772 | ||
2773 | nfs_fattr_init(fsstat->fattr); | |
2774 | return nfs4_call_sync(server, &msg, &args, &res, 0); | |
2775 | } | |
2776 | ||
2777 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2778 | { | |
2779 | struct nfs4_exception exception = { }; | |
2780 | int err; | |
2781 | do { | |
2782 | err = nfs4_handle_exception(server, | |
2783 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2784 | &exception); | |
2785 | } while (exception.retry); | |
2786 | return err; | |
2787 | } | |
2788 | ||
2789 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2790 | struct nfs_fsinfo *fsinfo) | |
2791 | { | |
2792 | struct nfs4_fsinfo_arg args = { | |
2793 | .fh = fhandle, | |
2794 | .bitmask = server->attr_bitmask, | |
2795 | }; | |
2796 | struct nfs4_fsinfo_res res = { | |
2797 | .fsinfo = fsinfo, | |
2798 | }; | |
2799 | struct rpc_message msg = { | |
2800 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2801 | .rpc_argp = &args, | |
2802 | .rpc_resp = &res, | |
2803 | }; | |
2804 | ||
2805 | return nfs4_call_sync(server, &msg, &args, &res, 0); | |
2806 | } | |
2807 | ||
2808 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2809 | { | |
2810 | struct nfs4_exception exception = { }; | |
2811 | int err; | |
2812 | ||
2813 | do { | |
2814 | err = nfs4_handle_exception(server, | |
2815 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2816 | &exception); | |
2817 | } while (exception.retry); | |
2818 | return err; | |
2819 | } | |
2820 | ||
2821 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2822 | { | |
2823 | nfs_fattr_init(fsinfo->fattr); | |
2824 | return nfs4_do_fsinfo(server, fhandle, fsinfo); | |
2825 | } | |
2826 | ||
2827 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2828 | struct nfs_pathconf *pathconf) | |
2829 | { | |
2830 | struct nfs4_pathconf_arg args = { | |
2831 | .fh = fhandle, | |
2832 | .bitmask = server->attr_bitmask, | |
2833 | }; | |
2834 | struct nfs4_pathconf_res res = { | |
2835 | .pathconf = pathconf, | |
2836 | }; | |
2837 | struct rpc_message msg = { | |
2838 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2839 | .rpc_argp = &args, | |
2840 | .rpc_resp = &res, | |
2841 | }; | |
2842 | ||
2843 | /* None of the pathconf attributes are mandatory to implement */ | |
2844 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2845 | memset(pathconf, 0, sizeof(*pathconf)); | |
2846 | return 0; | |
2847 | } | |
2848 | ||
2849 | nfs_fattr_init(pathconf->fattr); | |
2850 | return nfs4_call_sync(server, &msg, &args, &res, 0); | |
2851 | } | |
2852 | ||
2853 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2854 | struct nfs_pathconf *pathconf) | |
2855 | { | |
2856 | struct nfs4_exception exception = { }; | |
2857 | int err; | |
2858 | ||
2859 | do { | |
2860 | err = nfs4_handle_exception(server, | |
2861 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2862 | &exception); | |
2863 | } while (exception.retry); | |
2864 | return err; | |
2865 | } | |
2866 | ||
2867 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) | |
2868 | { | |
2869 | struct nfs_server *server = NFS_SERVER(data->inode); | |
2870 | ||
2871 | dprintk("--> %s\n", __func__); | |
2872 | ||
2873 | /* nfs4_sequence_free_slot called in the read rpc_call_done */ | |
2874 | nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); | |
2875 | ||
2876 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { | |
2877 | rpc_restart_call(task); | |
2878 | return -EAGAIN; | |
2879 | } | |
2880 | ||
2881 | nfs_invalidate_atime(data->inode); | |
2882 | if (task->tk_status > 0) | |
2883 | renew_lease(server, data->timestamp); | |
2884 | return 0; | |
2885 | } | |
2886 | ||
2887 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) | |
2888 | { | |
2889 | data->timestamp = jiffies; | |
2890 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; | |
2891 | } | |
2892 | ||
2893 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) | |
2894 | { | |
2895 | struct inode *inode = data->inode; | |
2896 | ||
2897 | /* slot is freed in nfs_writeback_done */ | |
2898 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, | |
2899 | task->tk_status); | |
2900 | ||
2901 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { | |
2902 | rpc_restart_call(task); | |
2903 | return -EAGAIN; | |
2904 | } | |
2905 | if (task->tk_status >= 0) { | |
2906 | renew_lease(NFS_SERVER(inode), data->timestamp); | |
2907 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); | |
2908 | } | |
2909 | return 0; | |
2910 | } | |
2911 | ||
2912 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) | |
2913 | { | |
2914 | struct nfs_server *server = NFS_SERVER(data->inode); | |
2915 | ||
2916 | data->args.bitmask = server->cache_consistency_bitmask; | |
2917 | data->res.server = server; | |
2918 | data->timestamp = jiffies; | |
2919 | ||
2920 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; | |
2921 | } | |
2922 | ||
2923 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) | |
2924 | { | |
2925 | struct inode *inode = data->inode; | |
2926 | ||
2927 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, | |
2928 | task->tk_status); | |
2929 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { | |
2930 | rpc_restart_call(task); | |
2931 | return -EAGAIN; | |
2932 | } | |
2933 | nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client, | |
2934 | &data->res.seq_res); | |
2935 | nfs_refresh_inode(inode, data->res.fattr); | |
2936 | return 0; | |
2937 | } | |
2938 | ||
2939 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) | |
2940 | { | |
2941 | struct nfs_server *server = NFS_SERVER(data->inode); | |
2942 | ||
2943 | data->args.bitmask = server->cache_consistency_bitmask; | |
2944 | data->res.server = server; | |
2945 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; | |
2946 | } | |
2947 | ||
2948 | /* | |
2949 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2950 | * standalone procedure for queueing an asynchronous RENEW. | |
2951 | */ | |
2952 | static void nfs4_renew_done(struct rpc_task *task, void *data) | |
2953 | { | |
2954 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; | |
2955 | unsigned long timestamp = (unsigned long)data; | |
2956 | ||
2957 | if (task->tk_status < 0) { | |
2958 | /* Unless we're shutting down, schedule state recovery! */ | |
2959 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
2960 | nfs4_schedule_state_recovery(clp); | |
2961 | return; | |
2962 | } | |
2963 | spin_lock(&clp->cl_lock); | |
2964 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2965 | clp->cl_last_renewal = timestamp; | |
2966 | spin_unlock(&clp->cl_lock); | |
2967 | } | |
2968 | ||
2969 | static const struct rpc_call_ops nfs4_renew_ops = { | |
2970 | .rpc_call_done = nfs4_renew_done, | |
2971 | }; | |
2972 | ||
2973 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) | |
2974 | { | |
2975 | struct rpc_message msg = { | |
2976 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2977 | .rpc_argp = clp, | |
2978 | .rpc_cred = cred, | |
2979 | }; | |
2980 | ||
2981 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
2982 | &nfs4_renew_ops, (void *)jiffies); | |
2983 | } | |
2984 | ||
2985 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) | |
2986 | { | |
2987 | struct rpc_message msg = { | |
2988 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2989 | .rpc_argp = clp, | |
2990 | .rpc_cred = cred, | |
2991 | }; | |
2992 | unsigned long now = jiffies; | |
2993 | int status; | |
2994 | ||
2995 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2996 | if (status < 0) | |
2997 | return status; | |
2998 | spin_lock(&clp->cl_lock); | |
2999 | if (time_before(clp->cl_last_renewal,now)) | |
3000 | clp->cl_last_renewal = now; | |
3001 | spin_unlock(&clp->cl_lock); | |
3002 | return 0; | |
3003 | } | |
3004 | ||
3005 | static inline int nfs4_server_supports_acls(struct nfs_server *server) | |
3006 | { | |
3007 | return (server->caps & NFS_CAP_ACLS) | |
3008 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3009 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3010 | } | |
3011 | ||
3012 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3013 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3014 | * the stack. | |
3015 | */ | |
3016 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3017 | ||
3018 | static void buf_to_pages(const void *buf, size_t buflen, | |
3019 | struct page **pages, unsigned int *pgbase) | |
3020 | { | |
3021 | const void *p = buf; | |
3022 | ||
3023 | *pgbase = offset_in_page(buf); | |
3024 | p -= *pgbase; | |
3025 | while (p < buf + buflen) { | |
3026 | *(pages++) = virt_to_page(p); | |
3027 | p += PAGE_CACHE_SIZE; | |
3028 | } | |
3029 | } | |
3030 | ||
3031 | struct nfs4_cached_acl { | |
3032 | int cached; | |
3033 | size_t len; | |
3034 | char data[0]; | |
3035 | }; | |
3036 | ||
3037 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3038 | { | |
3039 | struct nfs_inode *nfsi = NFS_I(inode); | |
3040 | ||
3041 | spin_lock(&inode->i_lock); | |
3042 | kfree(nfsi->nfs4_acl); | |
3043 | nfsi->nfs4_acl = acl; | |
3044 | spin_unlock(&inode->i_lock); | |
3045 | } | |
3046 | ||
3047 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3048 | { | |
3049 | nfs4_set_cached_acl(inode, NULL); | |
3050 | } | |
3051 | ||
3052 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3053 | { | |
3054 | struct nfs_inode *nfsi = NFS_I(inode); | |
3055 | struct nfs4_cached_acl *acl; | |
3056 | int ret = -ENOENT; | |
3057 | ||
3058 | spin_lock(&inode->i_lock); | |
3059 | acl = nfsi->nfs4_acl; | |
3060 | if (acl == NULL) | |
3061 | goto out; | |
3062 | if (buf == NULL) /* user is just asking for length */ | |
3063 | goto out_len; | |
3064 | if (acl->cached == 0) | |
3065 | goto out; | |
3066 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3067 | if (acl->len > buflen) | |
3068 | goto out; | |
3069 | memcpy(buf, acl->data, acl->len); | |
3070 | out_len: | |
3071 | ret = acl->len; | |
3072 | out: | |
3073 | spin_unlock(&inode->i_lock); | |
3074 | return ret; | |
3075 | } | |
3076 | ||
3077 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3078 | { | |
3079 | struct nfs4_cached_acl *acl; | |
3080 | ||
3081 | if (buf && acl_len <= PAGE_SIZE) { | |
3082 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3083 | if (acl == NULL) | |
3084 | goto out; | |
3085 | acl->cached = 1; | |
3086 | memcpy(acl->data, buf, acl_len); | |
3087 | } else { | |
3088 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3089 | if (acl == NULL) | |
3090 | goto out; | |
3091 | acl->cached = 0; | |
3092 | } | |
3093 | acl->len = acl_len; | |
3094 | out: | |
3095 | nfs4_set_cached_acl(inode, acl); | |
3096 | } | |
3097 | ||
3098 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3099 | { | |
3100 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3101 | struct nfs_getaclargs args = { | |
3102 | .fh = NFS_FH(inode), | |
3103 | .acl_pages = pages, | |
3104 | .acl_len = buflen, | |
3105 | }; | |
3106 | struct nfs_getaclres res = { | |
3107 | .acl_len = buflen, | |
3108 | }; | |
3109 | void *resp_buf; | |
3110 | struct rpc_message msg = { | |
3111 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3112 | .rpc_argp = &args, | |
3113 | .rpc_resp = &res, | |
3114 | }; | |
3115 | struct page *localpage = NULL; | |
3116 | int ret; | |
3117 | ||
3118 | if (buflen < PAGE_SIZE) { | |
3119 | /* As long as we're doing a round trip to the server anyway, | |
3120 | * let's be prepared for a page of acl data. */ | |
3121 | localpage = alloc_page(GFP_KERNEL); | |
3122 | resp_buf = page_address(localpage); | |
3123 | if (localpage == NULL) | |
3124 | return -ENOMEM; | |
3125 | args.acl_pages[0] = localpage; | |
3126 | args.acl_pgbase = 0; | |
3127 | args.acl_len = PAGE_SIZE; | |
3128 | } else { | |
3129 | resp_buf = buf; | |
3130 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3131 | } | |
3132 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); | |
3133 | if (ret) | |
3134 | goto out_free; | |
3135 | if (res.acl_len > args.acl_len) | |
3136 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
3137 | else | |
3138 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); | |
3139 | if (buf) { | |
3140 | ret = -ERANGE; | |
3141 | if (res.acl_len > buflen) | |
3142 | goto out_free; | |
3143 | if (localpage) | |
3144 | memcpy(buf, resp_buf, res.acl_len); | |
3145 | } | |
3146 | ret = res.acl_len; | |
3147 | out_free: | |
3148 | if (localpage) | |
3149 | __free_page(localpage); | |
3150 | return ret; | |
3151 | } | |
3152 | ||
3153 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) | |
3154 | { | |
3155 | struct nfs4_exception exception = { }; | |
3156 | ssize_t ret; | |
3157 | do { | |
3158 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3159 | if (ret >= 0) | |
3160 | break; | |
3161 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3162 | } while (exception.retry); | |
3163 | return ret; | |
3164 | } | |
3165 | ||
3166 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) | |
3167 | { | |
3168 | struct nfs_server *server = NFS_SERVER(inode); | |
3169 | int ret; | |
3170 | ||
3171 | if (!nfs4_server_supports_acls(server)) | |
3172 | return -EOPNOTSUPP; | |
3173 | ret = nfs_revalidate_inode(server, inode); | |
3174 | if (ret < 0) | |
3175 | return ret; | |
3176 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) | |
3177 | nfs_zap_acl_cache(inode); | |
3178 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3179 | if (ret != -ENOENT) | |
3180 | return ret; | |
3181 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3182 | } | |
3183 | ||
3184 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3185 | { | |
3186 | struct nfs_server *server = NFS_SERVER(inode); | |
3187 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3188 | struct nfs_setaclargs arg = { | |
3189 | .fh = NFS_FH(inode), | |
3190 | .acl_pages = pages, | |
3191 | .acl_len = buflen, | |
3192 | }; | |
3193 | struct nfs_setaclres res; | |
3194 | struct rpc_message msg = { | |
3195 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3196 | .rpc_argp = &arg, | |
3197 | .rpc_resp = &res, | |
3198 | }; | |
3199 | int ret; | |
3200 | ||
3201 | if (!nfs4_server_supports_acls(server)) | |
3202 | return -EOPNOTSUPP; | |
3203 | nfs_inode_return_delegation(inode); | |
3204 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); | |
3205 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); | |
3206 | nfs_access_zap_cache(inode); | |
3207 | nfs_zap_acl_cache(inode); | |
3208 | return ret; | |
3209 | } | |
3210 | ||
3211 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) | |
3212 | { | |
3213 | struct nfs4_exception exception = { }; | |
3214 | int err; | |
3215 | do { | |
3216 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3217 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3218 | &exception); | |
3219 | } while (exception.retry); | |
3220 | return err; | |
3221 | } | |
3222 | ||
3223 | static int | |
3224 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) | |
3225 | { | |
3226 | struct nfs_client *clp = server->nfs_client; | |
3227 | ||
3228 | if (!clp || task->tk_status >= 0) | |
3229 | return 0; | |
3230 | switch(task->tk_status) { | |
3231 | case -NFS4ERR_ADMIN_REVOKED: | |
3232 | case -NFS4ERR_BAD_STATEID: | |
3233 | case -NFS4ERR_OPENMODE: | |
3234 | if (state == NULL) | |
3235 | break; | |
3236 | nfs4_state_mark_reclaim_nograce(clp, state); | |
3237 | case -NFS4ERR_STALE_CLIENTID: | |
3238 | case -NFS4ERR_STALE_STATEID: | |
3239 | case -NFS4ERR_EXPIRED: | |
3240 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3241 | nfs4_schedule_state_recovery(clp); | |
3242 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3243 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3244 | task->tk_status = 0; | |
3245 | return -EAGAIN; | |
3246 | case -NFS4ERR_DELAY: | |
3247 | nfs_inc_server_stats(server, NFSIOS_DELAY); | |
3248 | case -NFS4ERR_GRACE: | |
3249 | rpc_delay(task, NFS4_POLL_RETRY_MAX); | |
3250 | task->tk_status = 0; | |
3251 | return -EAGAIN; | |
3252 | case -NFS4ERR_OLD_STATEID: | |
3253 | task->tk_status = 0; | |
3254 | return -EAGAIN; | |
3255 | } | |
3256 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3257 | return 0; | |
3258 | } | |
3259 | ||
3260 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) | |
3261 | { | |
3262 | nfs4_verifier sc_verifier; | |
3263 | struct nfs4_setclientid setclientid = { | |
3264 | .sc_verifier = &sc_verifier, | |
3265 | .sc_prog = program, | |
3266 | }; | |
3267 | struct rpc_message msg = { | |
3268 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3269 | .rpc_argp = &setclientid, | |
3270 | .rpc_resp = clp, | |
3271 | .rpc_cred = cred, | |
3272 | }; | |
3273 | __be32 *p; | |
3274 | int loop = 0; | |
3275 | int status; | |
3276 | ||
3277 | p = (__be32*)sc_verifier.data; | |
3278 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
3279 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3280 | ||
3281 | for(;;) { | |
3282 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
3283 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", | |
3284 | clp->cl_ipaddr, | |
3285 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3286 | RPC_DISPLAY_ADDR), | |
3287 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3288 | RPC_DISPLAY_PROTO), | |
3289 | clp->cl_rpcclient->cl_auth->au_ops->au_name, | |
3290 | clp->cl_id_uniquifier); | |
3291 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
3292 | sizeof(setclientid.sc_netid), | |
3293 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3294 | RPC_DISPLAY_NETID)); | |
3295 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, | |
3296 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", | |
3297 | clp->cl_ipaddr, port >> 8, port & 255); | |
3298 | ||
3299 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3300 | if (status != -NFS4ERR_CLID_INUSE) | |
3301 | break; | |
3302 | if (signalled()) | |
3303 | break; | |
3304 | if (loop++ & 1) | |
3305 | ssleep(clp->cl_lease_time + 1); | |
3306 | else | |
3307 | if (++clp->cl_id_uniquifier == 0) | |
3308 | break; | |
3309 | } | |
3310 | return status; | |
3311 | } | |
3312 | ||
3313 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) | |
3314 | { | |
3315 | struct nfs_fsinfo fsinfo; | |
3316 | struct rpc_message msg = { | |
3317 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3318 | .rpc_argp = clp, | |
3319 | .rpc_resp = &fsinfo, | |
3320 | .rpc_cred = cred, | |
3321 | }; | |
3322 | unsigned long now; | |
3323 | int status; | |
3324 | ||
3325 | now = jiffies; | |
3326 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3327 | if (status == 0) { | |
3328 | spin_lock(&clp->cl_lock); | |
3329 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3330 | clp->cl_last_renewal = now; | |
3331 | spin_unlock(&clp->cl_lock); | |
3332 | } | |
3333 | return status; | |
3334 | } | |
3335 | ||
3336 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) | |
3337 | { | |
3338 | long timeout = 0; | |
3339 | int err; | |
3340 | do { | |
3341 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3342 | switch (err) { | |
3343 | case 0: | |
3344 | return err; | |
3345 | case -NFS4ERR_RESOURCE: | |
3346 | /* The IBM lawyers misread another document! */ | |
3347 | case -NFS4ERR_DELAY: | |
3348 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3349 | } | |
3350 | } while (err == 0); | |
3351 | return err; | |
3352 | } | |
3353 | ||
3354 | struct nfs4_delegreturndata { | |
3355 | struct nfs4_delegreturnargs args; | |
3356 | struct nfs4_delegreturnres res; | |
3357 | struct nfs_fh fh; | |
3358 | nfs4_stateid stateid; | |
3359 | unsigned long timestamp; | |
3360 | struct nfs_fattr fattr; | |
3361 | int rpc_status; | |
3362 | }; | |
3363 | ||
3364 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) | |
3365 | { | |
3366 | struct nfs4_delegreturndata *data = calldata; | |
3367 | ||
3368 | nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res, | |
3369 | task->tk_status); | |
3370 | ||
3371 | data->rpc_status = task->tk_status; | |
3372 | if (data->rpc_status == 0) | |
3373 | renew_lease(data->res.server, data->timestamp); | |
3374 | } | |
3375 | ||
3376 | static void nfs4_delegreturn_release(void *calldata) | |
3377 | { | |
3378 | kfree(calldata); | |
3379 | } | |
3380 | ||
3381 | #if defined(CONFIG_NFS_V4_1) | |
3382 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3383 | { | |
3384 | struct nfs4_delegreturndata *d_data; | |
3385 | ||
3386 | d_data = (struct nfs4_delegreturndata *)data; | |
3387 | ||
3388 | if (nfs4_setup_sequence(d_data->res.server->nfs_client, | |
3389 | &d_data->args.seq_args, | |
3390 | &d_data->res.seq_res, 1, task)) | |
3391 | return; | |
3392 | rpc_call_start(task); | |
3393 | } | |
3394 | #endif /* CONFIG_NFS_V4_1 */ | |
3395 | ||
3396 | static const struct rpc_call_ops nfs4_delegreturn_ops = { | |
3397 | #if defined(CONFIG_NFS_V4_1) | |
3398 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3399 | #endif /* CONFIG_NFS_V4_1 */ | |
3400 | .rpc_call_done = nfs4_delegreturn_done, | |
3401 | .rpc_release = nfs4_delegreturn_release, | |
3402 | }; | |
3403 | ||
3404 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
3405 | { | |
3406 | struct nfs4_delegreturndata *data; | |
3407 | struct nfs_server *server = NFS_SERVER(inode); | |
3408 | struct rpc_task *task; | |
3409 | struct rpc_message msg = { | |
3410 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3411 | .rpc_cred = cred, | |
3412 | }; | |
3413 | struct rpc_task_setup task_setup_data = { | |
3414 | .rpc_client = server->client, | |
3415 | .rpc_message = &msg, | |
3416 | .callback_ops = &nfs4_delegreturn_ops, | |
3417 | .flags = RPC_TASK_ASYNC, | |
3418 | }; | |
3419 | int status = 0; | |
3420 | ||
3421 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
3422 | if (data == NULL) | |
3423 | return -ENOMEM; | |
3424 | data->args.fhandle = &data->fh; | |
3425 | data->args.stateid = &data->stateid; | |
3426 | data->args.bitmask = server->attr_bitmask; | |
3427 | nfs_copy_fh(&data->fh, NFS_FH(inode)); | |
3428 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
3429 | data->res.fattr = &data->fattr; | |
3430 | data->res.server = server; | |
3431 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
3432 | nfs_fattr_init(data->res.fattr); | |
3433 | data->timestamp = jiffies; | |
3434 | data->rpc_status = 0; | |
3435 | ||
3436 | task_setup_data.callback_data = data; | |
3437 | msg.rpc_argp = &data->args, | |
3438 | msg.rpc_resp = &data->res, | |
3439 | task = rpc_run_task(&task_setup_data); | |
3440 | if (IS_ERR(task)) | |
3441 | return PTR_ERR(task); | |
3442 | if (!issync) | |
3443 | goto out; | |
3444 | status = nfs4_wait_for_completion_rpc_task(task); | |
3445 | if (status != 0) | |
3446 | goto out; | |
3447 | status = data->rpc_status; | |
3448 | if (status != 0) | |
3449 | goto out; | |
3450 | nfs_refresh_inode(inode, &data->fattr); | |
3451 | out: | |
3452 | rpc_put_task(task); | |
3453 | return status; | |
3454 | } | |
3455 | ||
3456 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) | |
3457 | { | |
3458 | struct nfs_server *server = NFS_SERVER(inode); | |
3459 | struct nfs4_exception exception = { }; | |
3460 | int err; | |
3461 | do { | |
3462 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); | |
3463 | switch (err) { | |
3464 | case -NFS4ERR_STALE_STATEID: | |
3465 | case -NFS4ERR_EXPIRED: | |
3466 | case 0: | |
3467 | return 0; | |
3468 | } | |
3469 | err = nfs4_handle_exception(server, err, &exception); | |
3470 | } while (exception.retry); | |
3471 | return err; | |
3472 | } | |
3473 | ||
3474 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3475 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3476 | ||
3477 | /* | |
3478 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3479 | */ | |
3480 | static unsigned long | |
3481 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3482 | { | |
3483 | schedule_timeout_killable(timeout); | |
3484 | timeout <<= 1; | |
3485 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3486 | return NFS4_LOCK_MAXTIMEOUT; | |
3487 | return timeout; | |
3488 | } | |
3489 | ||
3490 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3491 | { | |
3492 | struct inode *inode = state->inode; | |
3493 | struct nfs_server *server = NFS_SERVER(inode); | |
3494 | struct nfs_client *clp = server->nfs_client; | |
3495 | struct nfs_lockt_args arg = { | |
3496 | .fh = NFS_FH(inode), | |
3497 | .fl = request, | |
3498 | }; | |
3499 | struct nfs_lockt_res res = { | |
3500 | .denied = request, | |
3501 | }; | |
3502 | struct rpc_message msg = { | |
3503 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3504 | .rpc_argp = &arg, | |
3505 | .rpc_resp = &res, | |
3506 | .rpc_cred = state->owner->so_cred, | |
3507 | }; | |
3508 | struct nfs4_lock_state *lsp; | |
3509 | int status; | |
3510 | ||
3511 | arg.lock_owner.clientid = clp->cl_clientid; | |
3512 | status = nfs4_set_lock_state(state, request); | |
3513 | if (status != 0) | |
3514 | goto out; | |
3515 | lsp = request->fl_u.nfs4_fl.owner; | |
3516 | arg.lock_owner.id = lsp->ls_id.id; | |
3517 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); | |
3518 | switch (status) { | |
3519 | case 0: | |
3520 | request->fl_type = F_UNLCK; | |
3521 | break; | |
3522 | case -NFS4ERR_DENIED: | |
3523 | status = 0; | |
3524 | } | |
3525 | request->fl_ops->fl_release_private(request); | |
3526 | out: | |
3527 | return status; | |
3528 | } | |
3529 | ||
3530 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3531 | { | |
3532 | struct nfs4_exception exception = { }; | |
3533 | int err; | |
3534 | ||
3535 | do { | |
3536 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3537 | _nfs4_proc_getlk(state, cmd, request), | |
3538 | &exception); | |
3539 | } while (exception.retry); | |
3540 | return err; | |
3541 | } | |
3542 | ||
3543 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3544 | { | |
3545 | int res = 0; | |
3546 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3547 | case FL_POSIX: | |
3548 | res = posix_lock_file_wait(file, fl); | |
3549 | break; | |
3550 | case FL_FLOCK: | |
3551 | res = flock_lock_file_wait(file, fl); | |
3552 | break; | |
3553 | default: | |
3554 | BUG(); | |
3555 | } | |
3556 | return res; | |
3557 | } | |
3558 | ||
3559 | struct nfs4_unlockdata { | |
3560 | struct nfs_locku_args arg; | |
3561 | struct nfs_locku_res res; | |
3562 | struct nfs4_lock_state *lsp; | |
3563 | struct nfs_open_context *ctx; | |
3564 | struct file_lock fl; | |
3565 | const struct nfs_server *server; | |
3566 | unsigned long timestamp; | |
3567 | }; | |
3568 | ||
3569 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, | |
3570 | struct nfs_open_context *ctx, | |
3571 | struct nfs4_lock_state *lsp, | |
3572 | struct nfs_seqid *seqid) | |
3573 | { | |
3574 | struct nfs4_unlockdata *p; | |
3575 | struct inode *inode = lsp->ls_state->inode; | |
3576 | ||
3577 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3578 | if (p == NULL) | |
3579 | return NULL; | |
3580 | p->arg.fh = NFS_FH(inode); | |
3581 | p->arg.fl = &p->fl; | |
3582 | p->arg.seqid = seqid; | |
3583 | p->res.seqid = seqid; | |
3584 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
3585 | p->arg.stateid = &lsp->ls_stateid; | |
3586 | p->lsp = lsp; | |
3587 | atomic_inc(&lsp->ls_count); | |
3588 | /* Ensure we don't close file until we're done freeing locks! */ | |
3589 | p->ctx = get_nfs_open_context(ctx); | |
3590 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3591 | p->server = NFS_SERVER(inode); | |
3592 | return p; | |
3593 | } | |
3594 | ||
3595 | static void nfs4_locku_release_calldata(void *data) | |
3596 | { | |
3597 | struct nfs4_unlockdata *calldata = data; | |
3598 | nfs_free_seqid(calldata->arg.seqid); | |
3599 | nfs4_put_lock_state(calldata->lsp); | |
3600 | put_nfs_open_context(calldata->ctx); | |
3601 | kfree(calldata); | |
3602 | } | |
3603 | ||
3604 | static void nfs4_locku_done(struct rpc_task *task, void *data) | |
3605 | { | |
3606 | struct nfs4_unlockdata *calldata = data; | |
3607 | ||
3608 | nfs4_sequence_done(calldata->server, &calldata->res.seq_res, | |
3609 | task->tk_status); | |
3610 | if (RPC_ASSASSINATED(task)) | |
3611 | return; | |
3612 | switch (task->tk_status) { | |
3613 | case 0: | |
3614 | memcpy(calldata->lsp->ls_stateid.data, | |
3615 | calldata->res.stateid.data, | |
3616 | sizeof(calldata->lsp->ls_stateid.data)); | |
3617 | renew_lease(calldata->server, calldata->timestamp); | |
3618 | break; | |
3619 | case -NFS4ERR_BAD_STATEID: | |
3620 | case -NFS4ERR_OLD_STATEID: | |
3621 | case -NFS4ERR_STALE_STATEID: | |
3622 | case -NFS4ERR_EXPIRED: | |
3623 | break; | |
3624 | default: | |
3625 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) | |
3626 | rpc_restart_call(task); | |
3627 | } | |
3628 | nfs4_sequence_free_slot(calldata->server->nfs_client, | |
3629 | &calldata->res.seq_res); | |
3630 | } | |
3631 | ||
3632 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) | |
3633 | { | |
3634 | struct nfs4_unlockdata *calldata = data; | |
3635 | ||
3636 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) | |
3637 | return; | |
3638 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
3639 | /* Note: exit _without_ running nfs4_locku_done */ | |
3640 | task->tk_action = NULL; | |
3641 | return; | |
3642 | } | |
3643 | calldata->timestamp = jiffies; | |
3644 | if (nfs4_setup_sequence(calldata->server->nfs_client, | |
3645 | &calldata->arg.seq_args, | |
3646 | &calldata->res.seq_res, 1, task)) | |
3647 | return; | |
3648 | rpc_call_start(task); | |
3649 | } | |
3650 | ||
3651 | static const struct rpc_call_ops nfs4_locku_ops = { | |
3652 | .rpc_call_prepare = nfs4_locku_prepare, | |
3653 | .rpc_call_done = nfs4_locku_done, | |
3654 | .rpc_release = nfs4_locku_release_calldata, | |
3655 | }; | |
3656 | ||
3657 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, | |
3658 | struct nfs_open_context *ctx, | |
3659 | struct nfs4_lock_state *lsp, | |
3660 | struct nfs_seqid *seqid) | |
3661 | { | |
3662 | struct nfs4_unlockdata *data; | |
3663 | struct rpc_message msg = { | |
3664 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3665 | .rpc_cred = ctx->cred, | |
3666 | }; | |
3667 | struct rpc_task_setup task_setup_data = { | |
3668 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
3669 | .rpc_message = &msg, | |
3670 | .callback_ops = &nfs4_locku_ops, | |
3671 | .workqueue = nfsiod_workqueue, | |
3672 | .flags = RPC_TASK_ASYNC, | |
3673 | }; | |
3674 | ||
3675 | /* Ensure this is an unlock - when canceling a lock, the | |
3676 | * canceled lock is passed in, and it won't be an unlock. | |
3677 | */ | |
3678 | fl->fl_type = F_UNLCK; | |
3679 | ||
3680 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); | |
3681 | if (data == NULL) { | |
3682 | nfs_free_seqid(seqid); | |
3683 | return ERR_PTR(-ENOMEM); | |
3684 | } | |
3685 | ||
3686 | msg.rpc_argp = &data->arg, | |
3687 | msg.rpc_resp = &data->res, | |
3688 | task_setup_data.callback_data = data; | |
3689 | return rpc_run_task(&task_setup_data); | |
3690 | } | |
3691 | ||
3692 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3693 | { | |
3694 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
3695 | struct nfs_seqid *seqid; | |
3696 | struct nfs4_lock_state *lsp; | |
3697 | struct rpc_task *task; | |
3698 | int status = 0; | |
3699 | unsigned char fl_flags = request->fl_flags; | |
3700 | ||
3701 | status = nfs4_set_lock_state(state, request); | |
3702 | /* Unlock _before_ we do the RPC call */ | |
3703 | request->fl_flags |= FL_EXISTS; | |
3704 | down_read(&nfsi->rwsem); | |
3705 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3706 | up_read(&nfsi->rwsem); | |
3707 | goto out; | |
3708 | } | |
3709 | up_read(&nfsi->rwsem); | |
3710 | if (status != 0) | |
3711 | goto out; | |
3712 | /* Is this a delegated lock? */ | |
3713 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3714 | goto out; | |
3715 | lsp = request->fl_u.nfs4_fl.owner; | |
3716 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3717 | status = -ENOMEM; | |
3718 | if (seqid == NULL) | |
3719 | goto out; | |
3720 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); | |
3721 | status = PTR_ERR(task); | |
3722 | if (IS_ERR(task)) | |
3723 | goto out; | |
3724 | status = nfs4_wait_for_completion_rpc_task(task); | |
3725 | rpc_put_task(task); | |
3726 | out: | |
3727 | request->fl_flags = fl_flags; | |
3728 | return status; | |
3729 | } | |
3730 | ||
3731 | struct nfs4_lockdata { | |
3732 | struct nfs_lock_args arg; | |
3733 | struct nfs_lock_res res; | |
3734 | struct nfs4_lock_state *lsp; | |
3735 | struct nfs_open_context *ctx; | |
3736 | struct file_lock fl; | |
3737 | unsigned long timestamp; | |
3738 | int rpc_status; | |
3739 | int cancelled; | |
3740 | struct nfs_server *server; | |
3741 | }; | |
3742 | ||
3743 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3744 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
3745 | { | |
3746 | struct nfs4_lockdata *p; | |
3747 | struct inode *inode = lsp->ls_state->inode; | |
3748 | struct nfs_server *server = NFS_SERVER(inode); | |
3749 | ||
3750 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3751 | if (p == NULL) | |
3752 | return NULL; | |
3753 | ||
3754 | p->arg.fh = NFS_FH(inode); | |
3755 | p->arg.fl = &p->fl; | |
3756 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); | |
3757 | if (p->arg.open_seqid == NULL) | |
3758 | goto out_free; | |
3759 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); | |
3760 | if (p->arg.lock_seqid == NULL) | |
3761 | goto out_free_seqid; | |
3762 | p->arg.lock_stateid = &lsp->ls_stateid; | |
3763 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; | |
3764 | p->arg.lock_owner.id = lsp->ls_id.id; | |
3765 | p->res.lock_seqid = p->arg.lock_seqid; | |
3766 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
3767 | p->lsp = lsp; | |
3768 | p->server = server; | |
3769 | atomic_inc(&lsp->ls_count); | |
3770 | p->ctx = get_nfs_open_context(ctx); | |
3771 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3772 | return p; | |
3773 | out_free_seqid: | |
3774 | nfs_free_seqid(p->arg.open_seqid); | |
3775 | out_free: | |
3776 | kfree(p); | |
3777 | return NULL; | |
3778 | } | |
3779 | ||
3780 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3781 | { | |
3782 | struct nfs4_lockdata *data = calldata; | |
3783 | struct nfs4_state *state = data->lsp->ls_state; | |
3784 | ||
3785 | dprintk("%s: begin!\n", __func__); | |
3786 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) | |
3787 | return; | |
3788 | /* Do we need to do an open_to_lock_owner? */ | |
3789 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
3790 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) | |
3791 | return; | |
3792 | data->arg.open_stateid = &state->stateid; | |
3793 | data->arg.new_lock_owner = 1; | |
3794 | data->res.open_seqid = data->arg.open_seqid; | |
3795 | } else | |
3796 | data->arg.new_lock_owner = 0; | |
3797 | data->timestamp = jiffies; | |
3798 | if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, | |
3799 | &data->res.seq_res, 1, task)) | |
3800 | return; | |
3801 | rpc_call_start(task); | |
3802 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); | |
3803 | } | |
3804 | ||
3805 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3806 | { | |
3807 | struct nfs4_lockdata *data = calldata; | |
3808 | ||
3809 | dprintk("%s: begin!\n", __func__); | |
3810 | ||
3811 | nfs4_sequence_done_free_slot(data->server, &data->res.seq_res, | |
3812 | task->tk_status); | |
3813 | ||
3814 | data->rpc_status = task->tk_status; | |
3815 | if (RPC_ASSASSINATED(task)) | |
3816 | goto out; | |
3817 | if (data->arg.new_lock_owner != 0) { | |
3818 | if (data->rpc_status == 0) | |
3819 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3820 | else | |
3821 | goto out; | |
3822 | } | |
3823 | if (data->rpc_status == 0) { | |
3824 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3825 | sizeof(data->lsp->ls_stateid.data)); | |
3826 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
3827 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); | |
3828 | } | |
3829 | out: | |
3830 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); | |
3831 | } | |
3832 | ||
3833 | static void nfs4_lock_release(void *calldata) | |
3834 | { | |
3835 | struct nfs4_lockdata *data = calldata; | |
3836 | ||
3837 | dprintk("%s: begin!\n", __func__); | |
3838 | nfs_free_seqid(data->arg.open_seqid); | |
3839 | if (data->cancelled != 0) { | |
3840 | struct rpc_task *task; | |
3841 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3842 | data->arg.lock_seqid); | |
3843 | if (!IS_ERR(task)) | |
3844 | rpc_put_task(task); | |
3845 | dprintk("%s: cancelling lock!\n", __func__); | |
3846 | } else | |
3847 | nfs_free_seqid(data->arg.lock_seqid); | |
3848 | nfs4_put_lock_state(data->lsp); | |
3849 | put_nfs_open_context(data->ctx); | |
3850 | kfree(data); | |
3851 | dprintk("%s: done!\n", __func__); | |
3852 | } | |
3853 | ||
3854 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3855 | .rpc_call_prepare = nfs4_lock_prepare, | |
3856 | .rpc_call_done = nfs4_lock_done, | |
3857 | .rpc_release = nfs4_lock_release, | |
3858 | }; | |
3859 | ||
3860 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3861 | { | |
3862 | struct nfs4_lockdata *data; | |
3863 | struct rpc_task *task; | |
3864 | struct rpc_message msg = { | |
3865 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3866 | .rpc_cred = state->owner->so_cred, | |
3867 | }; | |
3868 | struct rpc_task_setup task_setup_data = { | |
3869 | .rpc_client = NFS_CLIENT(state->inode), | |
3870 | .rpc_message = &msg, | |
3871 | .callback_ops = &nfs4_lock_ops, | |
3872 | .workqueue = nfsiod_workqueue, | |
3873 | .flags = RPC_TASK_ASYNC, | |
3874 | }; | |
3875 | int ret; | |
3876 | ||
3877 | dprintk("%s: begin!\n", __func__); | |
3878 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), | |
3879 | fl->fl_u.nfs4_fl.owner); | |
3880 | if (data == NULL) | |
3881 | return -ENOMEM; | |
3882 | if (IS_SETLKW(cmd)) | |
3883 | data->arg.block = 1; | |
3884 | if (reclaim != 0) | |
3885 | data->arg.reclaim = 1; | |
3886 | msg.rpc_argp = &data->arg, | |
3887 | msg.rpc_resp = &data->res, | |
3888 | task_setup_data.callback_data = data; | |
3889 | task = rpc_run_task(&task_setup_data); | |
3890 | if (IS_ERR(task)) | |
3891 | return PTR_ERR(task); | |
3892 | ret = nfs4_wait_for_completion_rpc_task(task); | |
3893 | if (ret == 0) { | |
3894 | ret = data->rpc_status; | |
3895 | if (ret == -NFS4ERR_DENIED) | |
3896 | ret = -EAGAIN; | |
3897 | } else | |
3898 | data->cancelled = 1; | |
3899 | rpc_put_task(task); | |
3900 | dprintk("%s: done, ret = %d!\n", __func__, ret); | |
3901 | return ret; | |
3902 | } | |
3903 | ||
3904 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3905 | { | |
3906 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3907 | struct nfs4_exception exception = { }; | |
3908 | int err; | |
3909 | ||
3910 | do { | |
3911 | /* Cache the lock if possible... */ | |
3912 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3913 | return 0; | |
3914 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); | |
3915 | if (err != -NFS4ERR_DELAY) | |
3916 | break; | |
3917 | nfs4_handle_exception(server, err, &exception); | |
3918 | } while (exception.retry); | |
3919 | return err; | |
3920 | } | |
3921 | ||
3922 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3923 | { | |
3924 | struct nfs_server *server = NFS_SERVER(state->inode); | |
3925 | struct nfs4_exception exception = { }; | |
3926 | int err; | |
3927 | ||
3928 | err = nfs4_set_lock_state(state, request); | |
3929 | if (err != 0) | |
3930 | return err; | |
3931 | do { | |
3932 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3933 | return 0; | |
3934 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); | |
3935 | if (err != -NFS4ERR_DELAY) | |
3936 | break; | |
3937 | nfs4_handle_exception(server, err, &exception); | |
3938 | } while (exception.retry); | |
3939 | return err; | |
3940 | } | |
3941 | ||
3942 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3943 | { | |
3944 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
3945 | unsigned char fl_flags = request->fl_flags; | |
3946 | int status; | |
3947 | ||
3948 | /* Is this a delegated open? */ | |
3949 | status = nfs4_set_lock_state(state, request); | |
3950 | if (status != 0) | |
3951 | goto out; | |
3952 | request->fl_flags |= FL_ACCESS; | |
3953 | status = do_vfs_lock(request->fl_file, request); | |
3954 | if (status < 0) | |
3955 | goto out; | |
3956 | down_read(&nfsi->rwsem); | |
3957 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
3958 | /* Yes: cache locks! */ | |
3959 | /* ...but avoid races with delegation recall... */ | |
3960 | request->fl_flags = fl_flags & ~FL_SLEEP; | |
3961 | status = do_vfs_lock(request->fl_file, request); | |
3962 | goto out_unlock; | |
3963 | } | |
3964 | status = _nfs4_do_setlk(state, cmd, request, 0); | |
3965 | if (status != 0) | |
3966 | goto out_unlock; | |
3967 | /* Note: we always want to sleep here! */ | |
3968 | request->fl_flags = fl_flags | FL_SLEEP; | |
3969 | if (do_vfs_lock(request->fl_file, request) < 0) | |
3970 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); | |
3971 | out_unlock: | |
3972 | up_read(&nfsi->rwsem); | |
3973 | out: | |
3974 | request->fl_flags = fl_flags; | |
3975 | return status; | |
3976 | } | |
3977 | ||
3978 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3979 | { | |
3980 | struct nfs4_exception exception = { }; | |
3981 | int err; | |
3982 | ||
3983 | do { | |
3984 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3985 | _nfs4_proc_setlk(state, cmd, request), | |
3986 | &exception); | |
3987 | } while (exception.retry); | |
3988 | return err; | |
3989 | } | |
3990 | ||
3991 | static int | |
3992 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3993 | { | |
3994 | struct nfs_open_context *ctx; | |
3995 | struct nfs4_state *state; | |
3996 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3997 | int status; | |
3998 | ||
3999 | /* verify open state */ | |
4000 | ctx = nfs_file_open_context(filp); | |
4001 | state = ctx->state; | |
4002 | ||
4003 | if (request->fl_start < 0 || request->fl_end < 0) | |
4004 | return -EINVAL; | |
4005 | ||
4006 | if (IS_GETLK(cmd)) | |
4007 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4008 | ||
4009 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4010 | return -EINVAL; | |
4011 | ||
4012 | if (request->fl_type == F_UNLCK) | |
4013 | return nfs4_proc_unlck(state, cmd, request); | |
4014 | ||
4015 | do { | |
4016 | status = nfs4_proc_setlk(state, cmd, request); | |
4017 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4018 | break; | |
4019 | timeout = nfs4_set_lock_task_retry(timeout); | |
4020 | status = -ERESTARTSYS; | |
4021 | if (signalled()) | |
4022 | break; | |
4023 | } while(status < 0); | |
4024 | return status; | |
4025 | } | |
4026 | ||
4027 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) | |
4028 | { | |
4029 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4030 | struct nfs4_exception exception = { }; | |
4031 | int err; | |
4032 | ||
4033 | err = nfs4_set_lock_state(state, fl); | |
4034 | if (err != 0) | |
4035 | goto out; | |
4036 | do { | |
4037 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
4038 | if (err != -NFS4ERR_DELAY) | |
4039 | break; | |
4040 | err = nfs4_handle_exception(server, err, &exception); | |
4041 | } while (exception.retry); | |
4042 | out: | |
4043 | return err; | |
4044 | } | |
4045 | ||
4046 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" | |
4047 | ||
4048 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, | |
4049 | size_t buflen, int flags) | |
4050 | { | |
4051 | struct inode *inode = dentry->d_inode; | |
4052 | ||
4053 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4054 | return -EOPNOTSUPP; | |
4055 | ||
4056 | return nfs4_proc_set_acl(inode, buf, buflen); | |
4057 | } | |
4058 | ||
4059 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4060 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4061 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4062 | * attributes in kernel-managed attribute namespaces. */ | |
4063 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4064 | size_t buflen) | |
4065 | { | |
4066 | struct inode *inode = dentry->d_inode; | |
4067 | ||
4068 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4069 | return -EOPNOTSUPP; | |
4070 | ||
4071 | return nfs4_proc_get_acl(inode, buf, buflen); | |
4072 | } | |
4073 | ||
4074 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4075 | { | |
4076 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; | |
4077 | ||
4078 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) | |
4079 | return 0; | |
4080 | if (buf && buflen < len) | |
4081 | return -ERANGE; | |
4082 | if (buf) | |
4083 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); | |
4084 | return len; | |
4085 | } | |
4086 | ||
4087 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) | |
4088 | { | |
4089 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4090 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4091 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4092 | return; | |
4093 | ||
4094 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4095 | NFS_ATTR_FATTR_NLINK; | |
4096 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4097 | fattr->nlink = 2; | |
4098 | } | |
4099 | ||
4100 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, | |
4101 | struct nfs4_fs_locations *fs_locations, struct page *page) | |
4102 | { | |
4103 | struct nfs_server *server = NFS_SERVER(dir); | |
4104 | u32 bitmask[2] = { | |
4105 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, | |
4106 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
4107 | }; | |
4108 | struct nfs4_fs_locations_arg args = { | |
4109 | .dir_fh = NFS_FH(dir), | |
4110 | .name = name, | |
4111 | .page = page, | |
4112 | .bitmask = bitmask, | |
4113 | }; | |
4114 | struct nfs4_fs_locations_res res = { | |
4115 | .fs_locations = fs_locations, | |
4116 | }; | |
4117 | struct rpc_message msg = { | |
4118 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4119 | .rpc_argp = &args, | |
4120 | .rpc_resp = &res, | |
4121 | }; | |
4122 | int status; | |
4123 | ||
4124 | dprintk("%s: start\n", __func__); | |
4125 | nfs_fattr_init(&fs_locations->fattr); | |
4126 | fs_locations->server = server; | |
4127 | fs_locations->nlocations = 0; | |
4128 | status = nfs4_call_sync(server, &msg, &args, &res, 0); | |
4129 | nfs_fixup_referral_attributes(&fs_locations->fattr); | |
4130 | dprintk("%s: returned status = %d\n", __func__, status); | |
4131 | return status; | |
4132 | } | |
4133 | ||
4134 | #ifdef CONFIG_NFS_V4_1 | |
4135 | /* | |
4136 | * nfs4_proc_exchange_id() | |
4137 | * | |
4138 | * Since the clientid has expired, all compounds using sessions | |
4139 | * associated with the stale clientid will be returning | |
4140 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4141 | * be in some phase of session reset. | |
4142 | */ | |
4143 | static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) | |
4144 | { | |
4145 | nfs4_verifier verifier; | |
4146 | struct nfs41_exchange_id_args args = { | |
4147 | .client = clp, | |
4148 | .flags = clp->cl_exchange_flags, | |
4149 | }; | |
4150 | struct nfs41_exchange_id_res res = { | |
4151 | .client = clp, | |
4152 | }; | |
4153 | int status; | |
4154 | struct rpc_message msg = { | |
4155 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4156 | .rpc_argp = &args, | |
4157 | .rpc_resp = &res, | |
4158 | .rpc_cred = cred, | |
4159 | }; | |
4160 | __be32 *p; | |
4161 | ||
4162 | dprintk("--> %s\n", __func__); | |
4163 | BUG_ON(clp == NULL); | |
4164 | p = (u32 *)verifier.data; | |
4165 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4166 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4167 | args.verifier = &verifier; | |
4168 | ||
4169 | while (1) { | |
4170 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4171 | "%s/%s %u", | |
4172 | clp->cl_ipaddr, | |
4173 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4174 | RPC_DISPLAY_ADDR), | |
4175 | clp->cl_id_uniquifier); | |
4176 | ||
4177 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4178 | ||
4179 | if (status != NFS4ERR_CLID_INUSE) | |
4180 | break; | |
4181 | ||
4182 | if (signalled()) | |
4183 | break; | |
4184 | ||
4185 | if (++clp->cl_id_uniquifier == 0) | |
4186 | break; | |
4187 | } | |
4188 | ||
4189 | dprintk("<-- %s status= %d\n", __func__, status); | |
4190 | return status; | |
4191 | } | |
4192 | ||
4193 | struct nfs4_get_lease_time_data { | |
4194 | struct nfs4_get_lease_time_args *args; | |
4195 | struct nfs4_get_lease_time_res *res; | |
4196 | struct nfs_client *clp; | |
4197 | }; | |
4198 | ||
4199 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4200 | void *calldata) | |
4201 | { | |
4202 | int ret; | |
4203 | struct nfs4_get_lease_time_data *data = | |
4204 | (struct nfs4_get_lease_time_data *)calldata; | |
4205 | ||
4206 | dprintk("--> %s\n", __func__); | |
4207 | /* just setup sequence, do not trigger session recovery | |
4208 | since we're invoked within one */ | |
4209 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
4210 | &data->args->la_seq_args, | |
4211 | &data->res->lr_seq_res, 0, task); | |
4212 | ||
4213 | BUG_ON(ret == -EAGAIN); | |
4214 | rpc_call_start(task); | |
4215 | dprintk("<-- %s\n", __func__); | |
4216 | } | |
4217 | ||
4218 | /* | |
4219 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4220 | * from sequence operation or clientid errors. | |
4221 | */ | |
4222 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4223 | { | |
4224 | struct nfs4_get_lease_time_data *data = | |
4225 | (struct nfs4_get_lease_time_data *)calldata; | |
4226 | ||
4227 | dprintk("--> %s\n", __func__); | |
4228 | nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); | |
4229 | switch (task->tk_status) { | |
4230 | case -NFS4ERR_DELAY: | |
4231 | case -NFS4ERR_GRACE: | |
4232 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
4233 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4234 | task->tk_status = 0; | |
4235 | rpc_restart_call(task); | |
4236 | return; | |
4237 | } | |
4238 | nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res); | |
4239 | dprintk("<-- %s\n", __func__); | |
4240 | } | |
4241 | ||
4242 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4243 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4244 | .rpc_call_done = nfs4_get_lease_time_done, | |
4245 | }; | |
4246 | ||
4247 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4248 | { | |
4249 | struct rpc_task *task; | |
4250 | struct nfs4_get_lease_time_args args; | |
4251 | struct nfs4_get_lease_time_res res = { | |
4252 | .lr_fsinfo = fsinfo, | |
4253 | }; | |
4254 | struct nfs4_get_lease_time_data data = { | |
4255 | .args = &args, | |
4256 | .res = &res, | |
4257 | .clp = clp, | |
4258 | }; | |
4259 | struct rpc_message msg = { | |
4260 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4261 | .rpc_argp = &args, | |
4262 | .rpc_resp = &res, | |
4263 | }; | |
4264 | struct rpc_task_setup task_setup = { | |
4265 | .rpc_client = clp->cl_rpcclient, | |
4266 | .rpc_message = &msg, | |
4267 | .callback_ops = &nfs4_get_lease_time_ops, | |
4268 | .callback_data = &data | |
4269 | }; | |
4270 | int status; | |
4271 | ||
4272 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4273 | dprintk("--> %s\n", __func__); | |
4274 | task = rpc_run_task(&task_setup); | |
4275 | ||
4276 | if (IS_ERR(task)) | |
4277 | status = PTR_ERR(task); | |
4278 | else { | |
4279 | status = task->tk_status; | |
4280 | rpc_put_task(task); | |
4281 | } | |
4282 | dprintk("<-- %s return %d\n", __func__, status); | |
4283 | ||
4284 | return status; | |
4285 | } | |
4286 | ||
4287 | /* | |
4288 | * Initialize slot table | |
4289 | */ | |
4290 | static int nfs4_init_slot_table(struct nfs4_session *session) | |
4291 | { | |
4292 | struct nfs4_slot_table *tbl = &session->fc_slot_table; | |
4293 | int i, max_slots = session->fc_attrs.max_reqs; | |
4294 | struct nfs4_slot *slot; | |
4295 | int ret = -ENOMEM; | |
4296 | ||
4297 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4298 | ||
4299 | dprintk("--> %s: max_reqs=%u\n", __func__, | |
4300 | session->fc_attrs.max_reqs); | |
4301 | ||
4302 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL); | |
4303 | if (!slot) | |
4304 | goto out; | |
4305 | for (i = 0; i < max_slots; ++i) | |
4306 | slot[i].seq_nr = 1; | |
4307 | ret = 0; | |
4308 | ||
4309 | spin_lock(&tbl->slot_tbl_lock); | |
4310 | if (tbl->slots != NULL) { | |
4311 | spin_unlock(&tbl->slot_tbl_lock); | |
4312 | dprintk("%s: slot table already initialized. tbl=%p slots=%p\n", | |
4313 | __func__, tbl, tbl->slots); | |
4314 | WARN_ON(1); | |
4315 | goto out_free; | |
4316 | } | |
4317 | tbl->max_slots = max_slots; | |
4318 | tbl->slots = slot; | |
4319 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4320 | spin_unlock(&tbl->slot_tbl_lock); | |
4321 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4322 | tbl, tbl->slots, tbl->max_slots); | |
4323 | out: | |
4324 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4325 | return ret; | |
4326 | out_free: | |
4327 | kfree(slot); | |
4328 | goto out; | |
4329 | } | |
4330 | ||
4331 | /* Destroy the slot table */ | |
4332 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
4333 | { | |
4334 | if (session->fc_slot_table.slots == NULL) | |
4335 | return; | |
4336 | kfree(session->fc_slot_table.slots); | |
4337 | session->fc_slot_table.slots = NULL; | |
4338 | return; | |
4339 | } | |
4340 | ||
4341 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4342 | { | |
4343 | struct nfs4_session *session; | |
4344 | struct nfs4_slot_table *tbl; | |
4345 | ||
4346 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
4347 | if (!session) | |
4348 | return NULL; | |
4349 | tbl = &session->fc_slot_table; | |
4350 | spin_lock_init(&tbl->slot_tbl_lock); | |
4351 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
4352 | session->clp = clp; | |
4353 | return session; | |
4354 | } | |
4355 | ||
4356 | void nfs4_destroy_session(struct nfs4_session *session) | |
4357 | { | |
4358 | nfs4_destroy_slot_table(session); | |
4359 | kfree(session); | |
4360 | } | |
4361 | ||
4362 | /* | |
4363 | * Initialize the values to be used by the client in CREATE_SESSION | |
4364 | * If nfs4_init_session set the fore channel request and response sizes, | |
4365 | * use them. | |
4366 | * | |
4367 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4368 | * always set csa_cachethis to FALSE because the current implementation | |
4369 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4370 | */ | |
4371 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4372 | { | |
4373 | struct nfs4_session *session = args->client->cl_session; | |
4374 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4375 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4376 | ||
4377 | if (mxrqst_sz == 0) | |
4378 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4379 | if (mxresp_sz == 0) | |
4380 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4381 | /* Fore channel attributes */ | |
4382 | args->fc_attrs.headerpadsz = 0; | |
4383 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4384 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
4385 | args->fc_attrs.max_resp_sz_cached = mxresp_sz; | |
4386 | args->fc_attrs.max_ops = NFS4_MAX_OPS; | |
4387 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4388 | ||
4389 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4390 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4391 | __func__, | |
4392 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
4393 | args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops, | |
4394 | args->fc_attrs.max_reqs); | |
4395 | ||
4396 | /* Back channel attributes */ | |
4397 | args->bc_attrs.headerpadsz = 0; | |
4398 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4399 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4400 | args->bc_attrs.max_resp_sz_cached = 0; | |
4401 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4402 | args->bc_attrs.max_reqs = 1; | |
4403 | ||
4404 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4405 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4406 | __func__, | |
4407 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4408 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4409 | args->bc_attrs.max_reqs); | |
4410 | } | |
4411 | ||
4412 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) | |
4413 | { | |
4414 | if (rcvd <= sent) | |
4415 | return 0; | |
4416 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4417 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4418 | return -EINVAL; | |
4419 | } | |
4420 | ||
4421 | #define _verify_fore_channel_attr(_name_) \ | |
4422 | _verify_channel_attr("fore", #_name_, \ | |
4423 | args->fc_attrs._name_, \ | |
4424 | session->fc_attrs._name_) | |
4425 | ||
4426 | #define _verify_back_channel_attr(_name_) \ | |
4427 | _verify_channel_attr("back", #_name_, \ | |
4428 | args->bc_attrs._name_, \ | |
4429 | session->bc_attrs._name_) | |
4430 | ||
4431 | /* | |
4432 | * The server is not allowed to increase the fore channel header pad size, | |
4433 | * maximum response size, or maximum number of operations. | |
4434 | * | |
4435 | * The back channel attributes are only negotiatied down: We send what the | |
4436 | * (back channel) server insists upon. | |
4437 | */ | |
4438 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4439 | struct nfs4_session *session) | |
4440 | { | |
4441 | int ret = 0; | |
4442 | ||
4443 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4444 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4445 | ret |= _verify_fore_channel_attr(max_ops); | |
4446 | ||
4447 | ret |= _verify_back_channel_attr(headerpadsz); | |
4448 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4449 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4450 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4451 | ret |= _verify_back_channel_attr(max_ops); | |
4452 | ret |= _verify_back_channel_attr(max_reqs); | |
4453 | ||
4454 | return ret; | |
4455 | } | |
4456 | ||
4457 | static int _nfs4_proc_create_session(struct nfs_client *clp) | |
4458 | { | |
4459 | struct nfs4_session *session = clp->cl_session; | |
4460 | struct nfs41_create_session_args args = { | |
4461 | .client = clp, | |
4462 | .cb_program = NFS4_CALLBACK, | |
4463 | }; | |
4464 | struct nfs41_create_session_res res = { | |
4465 | .client = clp, | |
4466 | }; | |
4467 | struct rpc_message msg = { | |
4468 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4469 | .rpc_argp = &args, | |
4470 | .rpc_resp = &res, | |
4471 | }; | |
4472 | int status; | |
4473 | ||
4474 | nfs4_init_channel_attrs(&args); | |
4475 | args.flags = (SESSION4_PERSIST); | |
4476 | ||
4477 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4478 | ||
4479 | if (!status) | |
4480 | /* Verify the session's negotiated channel_attrs values */ | |
4481 | status = nfs4_verify_channel_attrs(&args, session); | |
4482 | if (!status) { | |
4483 | /* Increment the clientid slot sequence id */ | |
4484 | clp->cl_seqid++; | |
4485 | } | |
4486 | ||
4487 | return status; | |
4488 | } | |
4489 | ||
4490 | /* | |
4491 | * Issues a CREATE_SESSION operation to the server. | |
4492 | * It is the responsibility of the caller to verify the session is | |
4493 | * expired before calling this routine. | |
4494 | */ | |
4495 | int nfs4_proc_create_session(struct nfs_client *clp) | |
4496 | { | |
4497 | int status; | |
4498 | unsigned *ptr; | |
4499 | struct nfs_fsinfo fsinfo; | |
4500 | struct nfs4_session *session = clp->cl_session; | |
4501 | ||
4502 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4503 | ||
4504 | status = _nfs4_proc_create_session(clp); | |
4505 | if (status) | |
4506 | goto out; | |
4507 | ||
4508 | /* Init the fore channel */ | |
4509 | status = nfs4_init_slot_table(session); | |
4510 | dprintk("fore channel slot table initialization returned %d\n", status); | |
4511 | if (status) | |
4512 | goto out; | |
4513 | ||
4514 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4515 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4516 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
4517 | ||
4518 | /* Get the lease time */ | |
4519 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
4520 | if (status == 0) { | |
4521 | /* Update lease time and schedule renewal */ | |
4522 | spin_lock(&clp->cl_lock); | |
4523 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
4524 | clp->cl_last_renewal = jiffies; | |
4525 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
4526 | spin_unlock(&clp->cl_lock); | |
4527 | ||
4528 | nfs4_schedule_state_renewal(clp); | |
4529 | } | |
4530 | out: | |
4531 | dprintk("<-- %s\n", __func__); | |
4532 | return status; | |
4533 | } | |
4534 | ||
4535 | #endif /* CONFIG_NFS_V4_1 */ | |
4536 | ||
4537 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { | |
4538 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
4539 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
4540 | .recover_open = nfs4_open_reclaim, | |
4541 | .recover_lock = nfs4_lock_reclaim, | |
4542 | }; | |
4543 | ||
4544 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { | |
4545 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
4546 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
4547 | .recover_open = nfs4_open_expired, | |
4548 | .recover_lock = nfs4_lock_expired, | |
4549 | }; | |
4550 | ||
4551 | static const struct inode_operations nfs4_file_inode_operations = { | |
4552 | .permission = nfs_permission, | |
4553 | .getattr = nfs_getattr, | |
4554 | .setattr = nfs_setattr, | |
4555 | .getxattr = nfs4_getxattr, | |
4556 | .setxattr = nfs4_setxattr, | |
4557 | .listxattr = nfs4_listxattr, | |
4558 | }; | |
4559 | ||
4560 | const struct nfs_rpc_ops nfs_v4_clientops = { | |
4561 | .version = 4, /* protocol version */ | |
4562 | .dentry_ops = &nfs4_dentry_operations, | |
4563 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
4564 | .file_inode_ops = &nfs4_file_inode_operations, | |
4565 | .getroot = nfs4_proc_get_root, | |
4566 | .getattr = nfs4_proc_getattr, | |
4567 | .setattr = nfs4_proc_setattr, | |
4568 | .lookupfh = nfs4_proc_lookupfh, | |
4569 | .lookup = nfs4_proc_lookup, | |
4570 | .access = nfs4_proc_access, | |
4571 | .readlink = nfs4_proc_readlink, | |
4572 | .create = nfs4_proc_create, | |
4573 | .remove = nfs4_proc_remove, | |
4574 | .unlink_setup = nfs4_proc_unlink_setup, | |
4575 | .unlink_done = nfs4_proc_unlink_done, | |
4576 | .rename = nfs4_proc_rename, | |
4577 | .link = nfs4_proc_link, | |
4578 | .symlink = nfs4_proc_symlink, | |
4579 | .mkdir = nfs4_proc_mkdir, | |
4580 | .rmdir = nfs4_proc_remove, | |
4581 | .readdir = nfs4_proc_readdir, | |
4582 | .mknod = nfs4_proc_mknod, | |
4583 | .statfs = nfs4_proc_statfs, | |
4584 | .fsinfo = nfs4_proc_fsinfo, | |
4585 | .pathconf = nfs4_proc_pathconf, | |
4586 | .set_capabilities = nfs4_server_capabilities, | |
4587 | .decode_dirent = nfs4_decode_dirent, | |
4588 | .read_setup = nfs4_proc_read_setup, | |
4589 | .read_done = nfs4_read_done, | |
4590 | .write_setup = nfs4_proc_write_setup, | |
4591 | .write_done = nfs4_write_done, | |
4592 | .commit_setup = nfs4_proc_commit_setup, | |
4593 | .commit_done = nfs4_commit_done, | |
4594 | .lock = nfs4_proc_lock, | |
4595 | .clear_acl_cache = nfs4_zap_acl_attr, | |
4596 | .close_context = nfs4_close_context, | |
4597 | }; | |
4598 | ||
4599 | /* | |
4600 | * Local variables: | |
4601 | * c-basic-offset: 8 | |
4602 | * End: | |
4603 | */ |