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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
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> | |
02a913a7 | 50 | #include <linux/mount.h> |
99fe60d0 | 51 | #include <linux/module.h> |
1da177e4 | 52 | |
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 | 54 | #include "delegation.h" |
101070ca | 55 | #include "internal.h" |
006ea73e | 56 | #include "iostat.h" |
fc931582 | 57 | #include "callback.h" |
1da177e4 LT |
58 | |
59 | #define NFSDBG_FACILITY NFSDBG_PROC | |
60 | ||
2066fe89 | 61 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
62 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
63 | ||
cdd4e68b | 64 | struct nfs4_opendata; |
864472e9 | 65 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 66 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 67 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
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); | |
1da177e4 | 70 | |
1da177e4 | 71 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 72 | static int nfs4_map_errors(int err) |
1da177e4 LT |
73 | { |
74 | if (err < -1000) { | |
75 | dprintk("%s could not handle NFSv4 error %d\n", | |
3110ff80 | 76 | __func__, -err); |
1da177e4 LT |
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 | ||
4ce79717 | 111 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
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 | ||
830b8e33 MN |
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 | ||
bc4785cd | 143 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
144 | struct nfs4_readdir_arg *readdir) |
145 | { | |
0dbb4c67 | 146 | __be32 *start, *p; |
1da177e4 LT |
147 | |
148 | BUG_ON(readdir->count < 80); | |
149 | if (cookie > 2) { | |
b7ef1956 | 150 | readdir->cookie = cookie; |
1da177e4 LT |
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 | */ | |
0dbb4c67 | 167 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
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 */ | |
4e769b93 | 179 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
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 */ | |
4e769b93 | 191 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
192 | |
193 | readdir->pgbase = (char *)p - (char *)start; | |
194 | readdir->count -= readdir->pgbase; | |
195 | kunmap_atomic(start, KM_USER0); | |
196 | } | |
197 | ||
65de872e TM |
198 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
199 | { | |
200 | int res; | |
201 | ||
202 | might_sleep(); | |
203 | ||
e005e804 | 204 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 205 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
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; | |
9e33bed5 | 232 | struct nfs4_state *state = exception->state; |
65de872e TM |
233 | int ret = errorcode; |
234 | ||
235 | exception->retry = 0; | |
236 | switch(errorcode) { | |
237 | case 0: | |
238 | return 0; | |
9e33bed5 TM |
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); | |
65de872e TM |
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; | |
4745e315 | 252 | #if !defined(CONFIG_NFS_V4_1) |
65de872e | 253 | break; |
4745e315 AA |
254 | #else /* !defined(CONFIG_NFS_V4_1) */ |
255 | if (!nfs4_has_session(server->nfs_client)) | |
256 | break; | |
257 | /* FALLTHROUGH */ | |
258 | case -NFS4ERR_BADSESSION: | |
259 | case -NFS4ERR_BADSLOT: | |
260 | case -NFS4ERR_BAD_HIGH_SLOT: | |
261 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
262 | case -NFS4ERR_DEADSESSION: | |
263 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
264 | case -NFS4ERR_SEQ_MISORDERED: | |
265 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
266 | errorcode); | |
267 | set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); | |
268 | exception->retry = 1; | |
269 | /* FALLTHROUGH */ | |
270 | #endif /* !defined(CONFIG_NFS_V4_1) */ | |
65de872e TM |
271 | case -NFS4ERR_FILE_OPEN: |
272 | case -NFS4ERR_GRACE: | |
273 | case -NFS4ERR_DELAY: | |
274 | ret = nfs4_delay(server->client, &exception->timeout); | |
275 | if (ret != 0) | |
276 | break; | |
277 | case -NFS4ERR_OLD_STATEID: | |
278 | exception->retry = 1; | |
279 | } | |
280 | /* We failed to handle the error */ | |
281 | return nfs4_map_errors(ret); | |
282 | } | |
283 | ||
284 | ||
26e976a8 | 285 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 286 | { |
7539bbab | 287 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
288 | spin_lock(&clp->cl_lock); |
289 | if (time_before(clp->cl_last_renewal,timestamp)) | |
290 | clp->cl_last_renewal = timestamp; | |
291 | spin_unlock(&clp->cl_lock); | |
292 | } | |
293 | ||
cccef3b9 AA |
294 | #if defined(CONFIG_NFS_V4_1) |
295 | ||
e2c4ab3c AA |
296 | /* |
297 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
298 | * | |
299 | * freeing a slot is trivially done by clearing its respective bit | |
300 | * in the bitmap. | |
301 | * If the freed slotid equals highest_used_slotid we want to update it | |
302 | * so that the server would be able to size down the slot table if needed, | |
303 | * otherwise we know that the highest_used_slotid is still in use. | |
304 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
305 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
306 | * highest slotid in use. | |
307 | * If none found, highest_used_slotid is set to -1. | |
308 | */ | |
309 | static void | |
310 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
311 | { | |
312 | int slotid = free_slotid; | |
313 | ||
314 | spin_lock(&tbl->slot_tbl_lock); | |
315 | /* clear used bit in bitmap */ | |
316 | __clear_bit(slotid, tbl->used_slots); | |
317 | ||
318 | /* update highest_used_slotid when it is freed */ | |
319 | if (slotid == tbl->highest_used_slotid) { | |
320 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
321 | if (slotid >= 0 && slotid < tbl->max_slots) | |
322 | tbl->highest_used_slotid = slotid; | |
323 | else | |
324 | tbl->highest_used_slotid = -1; | |
325 | } | |
326 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
327 | spin_unlock(&tbl->slot_tbl_lock); | |
328 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, | |
329 | free_slotid, tbl->highest_used_slotid); | |
330 | } | |
331 | ||
13615871 AA |
332 | void nfs41_sequence_free_slot(const struct nfs_client *clp, |
333 | struct nfs4_sequence_res *res) | |
334 | { | |
335 | struct nfs4_slot_table *tbl; | |
336 | ||
337 | if (!nfs4_has_session(clp)) { | |
338 | dprintk("%s: No session\n", __func__); | |
339 | return; | |
340 | } | |
341 | tbl = &clp->cl_session->fc_slot_table; | |
342 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { | |
343 | dprintk("%s: No slot\n", __func__); | |
344 | /* just wake up the next guy waiting since | |
345 | * we may have not consumed a slot after all */ | |
346 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
347 | return; | |
348 | } | |
349 | nfs4_free_slot(tbl, res->sr_slotid); | |
350 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
351 | } | |
352 | ||
b0df806c AA |
353 | static void nfs41_sequence_done(struct nfs_client *clp, |
354 | struct nfs4_sequence_res *res, | |
355 | int rpc_status) | |
356 | { | |
357 | unsigned long timestamp; | |
358 | struct nfs4_slot_table *tbl; | |
359 | struct nfs4_slot *slot; | |
360 | ||
361 | /* | |
362 | * sr_status remains 1 if an RPC level error occurred. The server | |
363 | * may or may not have processed the sequence operation.. | |
364 | * Proceed as if the server received and processed the sequence | |
365 | * operation. | |
366 | */ | |
367 | if (res->sr_status == 1) | |
368 | res->sr_status = NFS_OK; | |
369 | ||
370 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
371 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
372 | goto out; | |
373 | ||
374 | tbl = &clp->cl_session->fc_slot_table; | |
375 | slot = tbl->slots + res->sr_slotid; | |
376 | ||
377 | if (res->sr_status == 0) { | |
378 | /* Update the slot's sequence and clientid lease timer */ | |
379 | ++slot->seq_nr; | |
380 | timestamp = res->sr_renewal_time; | |
381 | spin_lock(&clp->cl_lock); | |
382 | if (time_before(clp->cl_last_renewal, timestamp)) | |
383 | clp->cl_last_renewal = timestamp; | |
384 | spin_unlock(&clp->cl_lock); | |
385 | return; | |
386 | } | |
387 | out: | |
388 | /* The session may be reset by one of the error handlers. */ | |
389 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
390 | nfs41_sequence_free_slot(clp, res); | |
391 | } | |
392 | ||
510b8175 BH |
393 | /* |
394 | * nfs4_find_slot - efficiently look for a free slot | |
395 | * | |
396 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
397 | * If found, we mark the slot as used, update the highest_used_slotid, | |
398 | * and respectively set up the sequence operation args. | |
399 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
400 | * |
401 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
402 | */ |
403 | static u8 | |
404 | nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task) | |
405 | { | |
406 | int slotid; | |
407 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
408 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
409 | ||
510b8175 BH |
410 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
411 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
412 | tbl->max_slots); | |
413 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
414 | if (slotid >= tbl->max_slots) | |
415 | goto out; | |
416 | __set_bit(slotid, tbl->used_slots); | |
417 | if (slotid > tbl->highest_used_slotid) | |
418 | tbl->highest_used_slotid = slotid; | |
419 | ret_id = slotid; | |
420 | out: | |
421 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
422 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
423 | return ret_id; |
424 | } | |
425 | ||
b069d94a AA |
426 | static int nfs4_recover_session(struct nfs4_session *session) |
427 | { | |
428 | struct nfs_client *clp = session->clp; | |
429 | int ret; | |
430 | ||
431 | for (;;) { | |
432 | ret = nfs4_wait_clnt_recover(clp); | |
433 | if (ret != 0) | |
434 | return ret; | |
435 | if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) | |
436 | break; | |
437 | nfs4_schedule_state_manager(clp); | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
ce5039c1 AA |
442 | static int nfs41_setup_sequence(struct nfs4_session *session, |
443 | struct nfs4_sequence_args *args, | |
444 | struct nfs4_sequence_res *res, | |
445 | int cache_reply, | |
446 | struct rpc_task *task) | |
447 | { | |
fbcd4abc AA |
448 | struct nfs4_slot *slot; |
449 | struct nfs4_slot_table *tbl; | |
b069d94a | 450 | int status = 0; |
fbcd4abc AA |
451 | u8 slotid; |
452 | ||
453 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
454 | /* slot already allocated? */ |
455 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
456 | return 0; | |
457 | ||
458 | memset(res, 0, sizeof(*res)); | |
459 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
fbcd4abc AA |
460 | tbl = &session->fc_slot_table; |
461 | ||
462 | spin_lock(&tbl->slot_tbl_lock); | |
b069d94a AA |
463 | if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) { |
464 | if (tbl->highest_used_slotid != -1) { | |
465 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
466 | spin_unlock(&tbl->slot_tbl_lock); | |
467 | dprintk("<-- %s: Session reset: draining\n", __func__); | |
468 | return -EAGAIN; | |
469 | } | |
470 | ||
471 | /* The slot table is empty; start the reset thread */ | |
472 | dprintk("%s Session Reset\n", __func__); | |
473 | spin_unlock(&tbl->slot_tbl_lock); | |
474 | status = nfs4_recover_session(session); | |
475 | if (status) | |
476 | return status; | |
477 | spin_lock(&tbl->slot_tbl_lock); | |
478 | } | |
479 | ||
fbcd4abc AA |
480 | slotid = nfs4_find_slot(tbl, task); |
481 | if (slotid == NFS4_MAX_SLOT_TABLE) { | |
482 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
483 | spin_unlock(&tbl->slot_tbl_lock); | |
484 | dprintk("<-- %s: no free slots\n", __func__); | |
485 | return -EAGAIN; | |
486 | } | |
487 | spin_unlock(&tbl->slot_tbl_lock); | |
488 | ||
489 | slot = tbl->slots + slotid; | |
99fe60d0 | 490 | args->sa_session = session; |
fbcd4abc AA |
491 | args->sa_slotid = slotid; |
492 | args->sa_cache_this = cache_reply; | |
493 | ||
494 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
495 | ||
99fe60d0 | 496 | res->sr_session = session; |
fbcd4abc AA |
497 | res->sr_slotid = slotid; |
498 | res->sr_renewal_time = jiffies; | |
499 | /* | |
500 | * sr_status is only set in decode_sequence, and so will remain | |
501 | * set to 1 if an rpc level failure occurs. | |
502 | */ | |
503 | res->sr_status = 1; | |
ce5039c1 AA |
504 | return 0; |
505 | } | |
506 | ||
507 | int nfs4_setup_sequence(struct nfs_client *clp, | |
508 | struct nfs4_sequence_args *args, | |
509 | struct nfs4_sequence_res *res, | |
510 | int cache_reply, | |
511 | struct rpc_task *task) | |
512 | { | |
513 | int ret = 0; | |
514 | ||
515 | dprintk("--> %s clp %p session %p sr_slotid %d\n", | |
516 | __func__, clp, clp->cl_session, res->sr_slotid); | |
517 | ||
518 | if (!nfs4_has_session(clp)) | |
519 | goto out; | |
520 | ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, | |
521 | task); | |
522 | if (ret != -EAGAIN) { | |
523 | /* terminate rpc task */ | |
524 | task->tk_status = ret; | |
525 | task->tk_action = NULL; | |
526 | } | |
527 | out: | |
528 | dprintk("<-- %s status=%d\n", __func__, ret); | |
529 | return ret; | |
530 | } | |
531 | ||
532 | struct nfs41_call_sync_data { | |
533 | struct nfs_client *clp; | |
534 | struct nfs4_sequence_args *seq_args; | |
535 | struct nfs4_sequence_res *seq_res; | |
536 | int cache_reply; | |
537 | }; | |
538 | ||
539 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
540 | { | |
541 | struct nfs41_call_sync_data *data = calldata; | |
542 | ||
543 | dprintk("--> %s data->clp->cl_session %p\n", __func__, | |
544 | data->clp->cl_session); | |
545 | if (nfs4_setup_sequence(data->clp, data->seq_args, | |
546 | data->seq_res, data->cache_reply, task)) | |
547 | return; | |
548 | rpc_call_start(task); | |
549 | } | |
550 | ||
69ab40c4 AA |
551 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
552 | { | |
553 | struct nfs41_call_sync_data *data = calldata; | |
554 | ||
555 | nfs41_sequence_done(data->clp, data->seq_res, task->tk_status); | |
556 | nfs41_sequence_free_slot(data->clp, data->seq_res); | |
557 | } | |
558 | ||
ce5039c1 AA |
559 | struct rpc_call_ops nfs41_call_sync_ops = { |
560 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 561 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
562 | }; |
563 | ||
564 | static int nfs4_call_sync_sequence(struct nfs_client *clp, | |
565 | struct rpc_clnt *clnt, | |
566 | struct rpc_message *msg, | |
567 | struct nfs4_sequence_args *args, | |
568 | struct nfs4_sequence_res *res, | |
569 | int cache_reply) | |
570 | { | |
571 | int ret; | |
572 | struct rpc_task *task; | |
573 | struct nfs41_call_sync_data data = { | |
574 | .clp = clp, | |
575 | .seq_args = args, | |
576 | .seq_res = res, | |
577 | .cache_reply = cache_reply, | |
578 | }; | |
579 | struct rpc_task_setup task_setup = { | |
580 | .rpc_client = clnt, | |
581 | .rpc_message = msg, | |
582 | .callback_ops = &nfs41_call_sync_ops, | |
583 | .callback_data = &data | |
584 | }; | |
585 | ||
586 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
587 | task = rpc_run_task(&task_setup); | |
588 | if (IS_ERR(task)) | |
589 | ret = PTR_ERR(task); | |
590 | else { | |
591 | ret = task->tk_status; | |
592 | rpc_put_task(task); | |
593 | } | |
594 | return ret; | |
595 | } | |
596 | ||
cccef3b9 AA |
597 | int _nfs4_call_sync_session(struct nfs_server *server, |
598 | struct rpc_message *msg, | |
599 | struct nfs4_sequence_args *args, | |
600 | struct nfs4_sequence_res *res, | |
601 | int cache_reply) | |
602 | { | |
ce5039c1 AA |
603 | return nfs4_call_sync_sequence(server->nfs_client, server->client, |
604 | msg, args, res, cache_reply); | |
cccef3b9 AA |
605 | } |
606 | ||
607 | #endif /* CONFIG_NFS_V4_1 */ | |
608 | ||
609 | int _nfs4_call_sync(struct nfs_server *server, | |
610 | struct rpc_message *msg, | |
611 | struct nfs4_sequence_args *args, | |
612 | struct nfs4_sequence_res *res, | |
613 | int cache_reply) | |
614 | { | |
f3752975 | 615 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
616 | return rpc_call_sync(server->client, msg, 0); |
617 | } | |
618 | ||
619 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
620 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
621 | &(res)->seq_res, (cache_reply)) | |
622 | ||
b0df806c AA |
623 | static void nfs4_sequence_done(const struct nfs_server *server, |
624 | struct nfs4_sequence_res *res, int rpc_status) | |
625 | { | |
626 | #ifdef CONFIG_NFS_V4_1 | |
627 | if (nfs4_has_session(server->nfs_client)) | |
628 | nfs41_sequence_done(server->nfs_client, res, rpc_status); | |
629 | #endif /* CONFIG_NFS_V4_1 */ | |
630 | } | |
631 | ||
632 | /* no restart, therefore free slot here */ | |
633 | static void nfs4_sequence_done_free_slot(const struct nfs_server *server, | |
634 | struct nfs4_sequence_res *res, | |
635 | int rpc_status) | |
636 | { | |
637 | nfs4_sequence_done(server, res, rpc_status); | |
638 | nfs4_sequence_free_slot(server->nfs_client, res); | |
639 | } | |
640 | ||
38478b24 | 641 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 642 | { |
38478b24 | 643 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 644 | |
38478b24 | 645 | spin_lock(&dir->i_lock); |
40d24704 TM |
646 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
647 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 648 | nfs_force_lookup_revalidate(dir); |
40d24704 | 649 | nfsi->change_attr = cinfo->after; |
38478b24 | 650 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
651 | } |
652 | ||
e56e0b78 | 653 | struct nfs4_opendata { |
c6d00e63 | 654 | struct kref kref; |
e56e0b78 TM |
655 | struct nfs_openargs o_arg; |
656 | struct nfs_openres o_res; | |
cdd4e68b TM |
657 | struct nfs_open_confirmargs c_arg; |
658 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
659 | struct nfs_fattr f_attr; |
660 | struct nfs_fattr dir_attr; | |
ad389da7 | 661 | struct path path; |
e56e0b78 TM |
662 | struct dentry *dir; |
663 | struct nfs4_state_owner *owner; | |
aac00a8d | 664 | struct nfs4_state *state; |
e56e0b78 | 665 | struct iattr attrs; |
26e976a8 | 666 | unsigned long timestamp; |
3e309914 | 667 | unsigned int rpc_done : 1; |
24ac23ab TM |
668 | int rpc_status; |
669 | int cancelled; | |
e56e0b78 TM |
670 | }; |
671 | ||
2ced46c2 TM |
672 | |
673 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
674 | { | |
675 | p->o_res.f_attr = &p->f_attr; | |
676 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
677 | p->o_res.seqid = p->o_arg.seqid; |
678 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
679 | p->o_res.server = p->o_arg.server; |
680 | nfs_fattr_init(&p->f_attr); | |
681 | nfs_fattr_init(&p->dir_attr); | |
682 | } | |
683 | ||
ad389da7 | 684 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 685 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
686 | const struct iattr *attrs) |
687 | { | |
ad389da7 | 688 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
689 | struct inode *dir = parent->d_inode; |
690 | struct nfs_server *server = NFS_SERVER(dir); | |
691 | struct nfs4_opendata *p; | |
692 | ||
693 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
694 | if (p == NULL) | |
695 | goto err; | |
696 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
697 | if (p->o_arg.seqid == NULL) | |
698 | goto err_free; | |
ad389da7 TM |
699 | p->path.mnt = mntget(path->mnt); |
700 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
701 | p->dir = parent; |
702 | p->owner = sp; | |
703 | atomic_inc(&sp->so_count); | |
704 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
705 | p->o_arg.open_flags = flags; |
706 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 707 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 708 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 709 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
710 | p->o_arg.server = server; |
711 | p->o_arg.bitmask = server->attr_bitmask; | |
712 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
5f7dbd5c | 713 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
e56e0b78 TM |
714 | if (flags & O_EXCL) { |
715 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
716 | s[0] = jiffies; | |
717 | s[1] = current->pid; | |
718 | } else if (flags & O_CREAT) { | |
719 | p->o_arg.u.attrs = &p->attrs; | |
720 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
721 | } | |
cdd4e68b TM |
722 | p->c_arg.fh = &p->o_res.fh; |
723 | p->c_arg.stateid = &p->o_res.stateid; | |
724 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 725 | nfs4_init_opendata_res(p); |
c6d00e63 | 726 | kref_init(&p->kref); |
e56e0b78 TM |
727 | return p; |
728 | err_free: | |
729 | kfree(p); | |
730 | err: | |
731 | dput(parent); | |
732 | return NULL; | |
733 | } | |
734 | ||
c6d00e63 | 735 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 736 | { |
c6d00e63 TM |
737 | struct nfs4_opendata *p = container_of(kref, |
738 | struct nfs4_opendata, kref); | |
739 | ||
740 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
741 | if (p->state != NULL) |
742 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
743 | nfs4_put_state_owner(p->owner); |
744 | dput(p->dir); | |
31f31db1 | 745 | path_put(&p->path); |
c6d00e63 TM |
746 | kfree(p); |
747 | } | |
748 | ||
749 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
750 | { | |
751 | if (p != NULL) | |
752 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
753 | } |
754 | ||
06f814a3 TM |
755 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
756 | { | |
06f814a3 TM |
757 | int ret; |
758 | ||
06f814a3 | 759 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
760 | return ret; |
761 | } | |
762 | ||
dc0b027d | 763 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
764 | { |
765 | int ret = 0; | |
dc0b027d TM |
766 | |
767 | if (open_mode & O_EXCL) | |
768 | goto out; | |
769 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
770 | case FMODE_READ: |
771 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
772 | break; |
773 | case FMODE_WRITE: | |
774 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
775 | break; |
776 | case FMODE_READ|FMODE_WRITE: | |
777 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
778 | } | |
dc0b027d | 779 | out: |
6ee41268 TM |
780 | return ret; |
781 | } | |
782 | ||
dc0b027d | 783 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 784 | { |
dc0b027d | 785 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 786 | return 0; |
15c831bf | 787 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 788 | return 0; |
b7391f44 | 789 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
790 | return 1; |
791 | } | |
792 | ||
dc0b027d | 793 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 794 | { |
dc0b027d | 795 | switch (fmode) { |
e7616923 TM |
796 | case FMODE_WRITE: |
797 | state->n_wronly++; | |
798 | break; | |
799 | case FMODE_READ: | |
800 | state->n_rdonly++; | |
801 | break; | |
802 | case FMODE_READ|FMODE_WRITE: | |
803 | state->n_rdwr++; | |
804 | } | |
dc0b027d | 805 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
806 | } |
807 | ||
dc0b027d | 808 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
809 | { |
810 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
811 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
812 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 813 | switch (fmode) { |
003707c7 TM |
814 | case FMODE_READ: |
815 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
816 | break; | |
817 | case FMODE_WRITE: | |
818 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
819 | break; | |
820 | case FMODE_READ|FMODE_WRITE: | |
821 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
822 | } | |
e7616923 TM |
823 | } |
824 | ||
dc0b027d | 825 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 826 | { |
8bda4e4c | 827 | write_seqlock(&state->seqlock); |
dc0b027d | 828 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 829 | write_sequnlock(&state->seqlock); |
003707c7 TM |
830 | } |
831 | ||
dc0b027d | 832 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 833 | { |
8bda4e4c TM |
834 | /* |
835 | * Protect the call to nfs4_state_set_mode_locked and | |
836 | * serialise the stateid update | |
837 | */ | |
838 | write_seqlock(&state->seqlock); | |
003707c7 TM |
839 | if (deleg_stateid != NULL) { |
840 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
841 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
842 | } | |
843 | if (open_stateid != NULL) | |
dc0b027d | 844 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
845 | write_sequnlock(&state->seqlock); |
846 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 847 | update_open_stateflags(state, fmode); |
ec073428 | 848 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
849 | } |
850 | ||
dc0b027d | 851 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
852 | { |
853 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
854 | struct nfs_delegation *deleg_cur; | |
855 | int ret = 0; | |
856 | ||
dc0b027d | 857 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
858 | |
859 | rcu_read_lock(); | |
860 | deleg_cur = rcu_dereference(nfsi->delegation); | |
861 | if (deleg_cur == NULL) | |
862 | goto no_delegation; | |
863 | ||
864 | spin_lock(&deleg_cur->lock); | |
865 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 866 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
867 | goto no_delegation_unlock; |
868 | ||
869 | if (delegation == NULL) | |
870 | delegation = &deleg_cur->stateid; | |
871 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
872 | goto no_delegation_unlock; | |
873 | ||
b7391f44 | 874 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 875 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
876 | ret = 1; |
877 | no_delegation_unlock: | |
878 | spin_unlock(&deleg_cur->lock); | |
879 | no_delegation: | |
880 | rcu_read_unlock(); | |
881 | ||
882 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 883 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
884 | ret = 1; |
885 | } | |
886 | ||
887 | return ret; | |
888 | } | |
889 | ||
890 | ||
dc0b027d | 891 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
892 | { |
893 | struct nfs_delegation *delegation; | |
894 | ||
895 | rcu_read_lock(); | |
896 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 897 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
898 | rcu_read_unlock(); |
899 | return; | |
900 | } | |
901 | rcu_read_unlock(); | |
902 | nfs_inode_return_delegation(inode); | |
903 | } | |
904 | ||
6ee41268 | 905 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
906 | { |
907 | struct nfs4_state *state = opendata->state; | |
908 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
909 | struct nfs_delegation *delegation; | |
dc0b027d TM |
910 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
911 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
912 | nfs4_stateid stateid; |
913 | int ret = -EAGAIN; | |
914 | ||
aac00a8d | 915 | for (;;) { |
dc0b027d | 916 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 917 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
918 | if (can_open_cached(state, fmode, open_mode)) { |
919 | update_open_stateflags(state, fmode); | |
6ee41268 | 920 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
921 | goto out_return_state; |
922 | } | |
923 | spin_unlock(&state->owner->so_lock); | |
924 | } | |
34310430 TM |
925 | rcu_read_lock(); |
926 | delegation = rcu_dereference(nfsi->delegation); | |
927 | if (delegation == NULL || | |
dc0b027d | 928 | !can_open_delegated(delegation, fmode)) { |
34310430 | 929 | rcu_read_unlock(); |
aac00a8d | 930 | break; |
34310430 | 931 | } |
aac00a8d TM |
932 | /* Save the delegation */ |
933 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
934 | rcu_read_unlock(); | |
af22f94a | 935 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
936 | if (ret != 0) |
937 | goto out; | |
938 | ret = -EAGAIN; | |
34310430 TM |
939 | |
940 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 941 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 942 | goto out_return_state; |
aac00a8d | 943 | } |
aac00a8d TM |
944 | out: |
945 | return ERR_PTR(ret); | |
946 | out_return_state: | |
947 | atomic_inc(&state->count); | |
948 | return state; | |
949 | } | |
950 | ||
24ac23ab TM |
951 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
952 | { | |
953 | struct inode *inode; | |
954 | struct nfs4_state *state = NULL; | |
003707c7 | 955 | struct nfs_delegation *delegation; |
1b370bc2 | 956 | int ret; |
24ac23ab | 957 | |
aac00a8d | 958 | if (!data->rpc_done) { |
6ee41268 | 959 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
960 | goto out; |
961 | } | |
962 | ||
1b370bc2 | 963 | ret = -EAGAIN; |
24ac23ab | 964 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 965 | goto err; |
24ac23ab | 966 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 967 | ret = PTR_ERR(inode); |
03f28e3a | 968 | if (IS_ERR(inode)) |
1b370bc2 TM |
969 | goto err; |
970 | ret = -ENOMEM; | |
24ac23ab TM |
971 | state = nfs4_get_open_state(inode, data->owner); |
972 | if (state == NULL) | |
1b370bc2 | 973 | goto err_put_inode; |
549d6ed5 | 974 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
975 | int delegation_flags = 0; |
976 | ||
003707c7 TM |
977 | rcu_read_lock(); |
978 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
979 | if (delegation) | |
980 | delegation_flags = delegation->flags; | |
981 | rcu_read_unlock(); | |
15c831bf | 982 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
983 | nfs_inode_set_delegation(state->inode, |
984 | data->owner->so_cred, | |
985 | &data->o_res); | |
986 | else | |
987 | nfs_inode_reclaim_delegation(state->inode, | |
988 | data->owner->so_cred, | |
989 | &data->o_res); | |
990 | } | |
34310430 TM |
991 | |
992 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 993 | data->o_arg.fmode); |
24ac23ab | 994 | iput(inode); |
aac00a8d | 995 | out: |
24ac23ab | 996 | return state; |
1b370bc2 TM |
997 | err_put_inode: |
998 | iput(inode); | |
999 | err: | |
1000 | return ERR_PTR(ret); | |
24ac23ab TM |
1001 | } |
1002 | ||
864472e9 TM |
1003 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
1004 | { | |
1005 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1006 | struct nfs_open_context *ctx; | |
1007 | ||
1008 | spin_lock(&state->inode->i_lock); | |
1009 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1010 | if (ctx->state != state) | |
1011 | continue; | |
1012 | get_nfs_open_context(ctx); | |
1013 | spin_unlock(&state->inode->i_lock); | |
1014 | return ctx; | |
1015 | } | |
1016 | spin_unlock(&state->inode->i_lock); | |
1017 | return ERR_PTR(-ENOENT); | |
1018 | } | |
1019 | ||
6f220ed5 TM |
1020 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
1021 | { | |
1022 | struct nfs4_opendata *opendata; | |
1023 | ||
dc0b027d | 1024 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
1025 | if (opendata == NULL) |
1026 | return ERR_PTR(-ENOMEM); | |
1027 | opendata->state = state; | |
1028 | atomic_inc(&state->count); | |
1029 | return opendata; | |
1030 | } | |
1031 | ||
dc0b027d | 1032 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 1033 | { |
2ced46c2 | 1034 | struct nfs4_state *newstate; |
864472e9 TM |
1035 | int ret; |
1036 | ||
dc0b027d TM |
1037 | opendata->o_arg.open_flags = 0; |
1038 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
1039 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
1040 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1041 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
1042 | ret = _nfs4_proc_open(opendata); |
1043 | if (ret != 0) | |
1044 | return ret; | |
2ced46c2 | 1045 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1046 | if (IS_ERR(newstate)) |
1047 | return PTR_ERR(newstate); | |
dc0b027d | 1048 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 1049 | *res = newstate; |
864472e9 TM |
1050 | return 0; |
1051 | } | |
1052 | ||
1053 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1054 | { | |
864472e9 | 1055 | struct nfs4_state *newstate; |
864472e9 TM |
1056 | int ret; |
1057 | ||
1058 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1059 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1060 | smp_rmb(); |
1061 | if (state->n_rdwr != 0) { | |
2ced46c2 | 1062 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1063 | if (ret != 0) |
1064 | return ret; | |
2ced46c2 TM |
1065 | if (newstate != state) |
1066 | return -ESTALE; | |
864472e9 TM |
1067 | } |
1068 | if (state->n_wronly != 0) { | |
2ced46c2 | 1069 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1070 | if (ret != 0) |
1071 | return ret; | |
2ced46c2 TM |
1072 | if (newstate != state) |
1073 | return -ESTALE; | |
864472e9 TM |
1074 | } |
1075 | if (state->n_rdonly != 0) { | |
2ced46c2 | 1076 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1077 | if (ret != 0) |
1078 | return ret; | |
2ced46c2 TM |
1079 | if (newstate != state) |
1080 | return -ESTALE; | |
864472e9 | 1081 | } |
1ac7e2fd TM |
1082 | /* |
1083 | * We may have performed cached opens for all three recoveries. | |
1084 | * Check if we need to update the current stateid. | |
1085 | */ | |
1086 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1087 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1088 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1089 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1090 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1091 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1092 | } |
864472e9 TM |
1093 | return 0; |
1094 | } | |
1095 | ||
1da177e4 LT |
1096 | /* |
1097 | * OPEN_RECLAIM: | |
1098 | * reclaim state on the server after a reboot. | |
1da177e4 | 1099 | */ |
539cd03a | 1100 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1101 | { |
1ac7e2fd | 1102 | struct nfs_delegation *delegation; |
864472e9 | 1103 | struct nfs4_opendata *opendata; |
dc0b027d | 1104 | fmode_t delegation_type = 0; |
1da177e4 LT |
1105 | int status; |
1106 | ||
6f220ed5 TM |
1107 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1108 | if (IS_ERR(opendata)) | |
1109 | return PTR_ERR(opendata); | |
864472e9 TM |
1110 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1111 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1112 | rcu_read_lock(); |
1113 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1114 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1115 | delegation_type = delegation->type; |
1ac7e2fd | 1116 | rcu_read_unlock(); |
864472e9 TM |
1117 | opendata->o_arg.u.delegation_type = delegation_type; |
1118 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1119 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1120 | return status; |
1121 | } | |
1122 | ||
539cd03a | 1123 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1124 | { |
1125 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1126 | struct nfs4_exception exception = { }; | |
1127 | int err; | |
1128 | do { | |
539cd03a | 1129 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
1130 | if (err != -NFS4ERR_DELAY) |
1131 | break; | |
1132 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1133 | } while (exception.retry); |
1134 | return err; | |
1135 | } | |
1136 | ||
864472e9 TM |
1137 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1138 | { | |
1139 | struct nfs_open_context *ctx; | |
1140 | int ret; | |
1141 | ||
1142 | ctx = nfs4_state_find_open_context(state); | |
1143 | if (IS_ERR(ctx)) | |
1144 | return PTR_ERR(ctx); | |
539cd03a | 1145 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1146 | put_nfs_open_context(ctx); |
1147 | return ret; | |
1148 | } | |
1149 | ||
13437e12 | 1150 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1151 | { |
e56e0b78 | 1152 | struct nfs4_opendata *opendata; |
864472e9 | 1153 | int ret; |
1da177e4 | 1154 | |
6f220ed5 TM |
1155 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1156 | if (IS_ERR(opendata)) | |
1157 | return PTR_ERR(opendata); | |
e56e0b78 | 1158 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1159 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1160 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1161 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1162 | nfs4_opendata_put(opendata); |
864472e9 | 1163 | return ret; |
1da177e4 LT |
1164 | } |
1165 | ||
13437e12 | 1166 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1167 | { |
1168 | struct nfs4_exception exception = { }; | |
539cd03a | 1169 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1170 | int err; |
1171 | do { | |
13437e12 | 1172 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1173 | switch (err) { |
1174 | case 0: | |
1175 | return err; | |
1176 | case -NFS4ERR_STALE_CLIENTID: | |
1177 | case -NFS4ERR_STALE_STATEID: | |
1178 | case -NFS4ERR_EXPIRED: | |
1179 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1180 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
1181 | return err; |
1182 | } | |
1183 | err = nfs4_handle_exception(server, err, &exception); | |
1184 | } while (exception.retry); | |
1185 | return err; | |
1186 | } | |
1187 | ||
cdd4e68b TM |
1188 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1189 | { | |
1190 | struct nfs4_opendata *data = calldata; | |
1191 | ||
1192 | data->rpc_status = task->tk_status; | |
1193 | if (RPC_ASSASSINATED(task)) | |
1194 | return; | |
26e976a8 | 1195 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1196 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1197 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1198 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1199 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1200 | data->rpc_done = 1; |
26e976a8 | 1201 | } |
cdd4e68b TM |
1202 | } |
1203 | ||
1204 | static void nfs4_open_confirm_release(void *calldata) | |
1205 | { | |
1206 | struct nfs4_opendata *data = calldata; | |
1207 | struct nfs4_state *state = NULL; | |
1208 | ||
1209 | /* If this request hasn't been cancelled, do nothing */ | |
1210 | if (data->cancelled == 0) | |
1211 | goto out_free; | |
1212 | /* In case of error, no cleanup! */ | |
3e309914 | 1213 | if (!data->rpc_done) |
cdd4e68b | 1214 | goto out_free; |
cdd4e68b | 1215 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1216 | if (!IS_ERR(state)) |
dc0b027d | 1217 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1218 | out_free: |
c6d00e63 | 1219 | nfs4_opendata_put(data); |
cdd4e68b TM |
1220 | } |
1221 | ||
1222 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1223 | .rpc_call_done = nfs4_open_confirm_done, |
1224 | .rpc_release = nfs4_open_confirm_release, | |
1225 | }; | |
1226 | ||
1227 | /* | |
1228 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1229 | */ | |
1230 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1231 | { | |
1232 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1233 | struct rpc_task *task; | |
5138fde0 TM |
1234 | struct rpc_message msg = { |
1235 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1236 | .rpc_argp = &data->c_arg, | |
1237 | .rpc_resp = &data->c_res, | |
1238 | .rpc_cred = data->owner->so_cred, | |
1239 | }; | |
c970aa85 TM |
1240 | struct rpc_task_setup task_setup_data = { |
1241 | .rpc_client = server->client, | |
5138fde0 | 1242 | .rpc_message = &msg, |
c970aa85 TM |
1243 | .callback_ops = &nfs4_open_confirm_ops, |
1244 | .callback_data = data, | |
101070ca | 1245 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1246 | .flags = RPC_TASK_ASYNC, |
1247 | }; | |
1da177e4 LT |
1248 | int status; |
1249 | ||
c6d00e63 | 1250 | kref_get(&data->kref); |
3e309914 TM |
1251 | data->rpc_done = 0; |
1252 | data->rpc_status = 0; | |
5138fde0 | 1253 | data->timestamp = jiffies; |
c970aa85 | 1254 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1255 | if (IS_ERR(task)) |
cdd4e68b | 1256 | return PTR_ERR(task); |
cdd4e68b TM |
1257 | status = nfs4_wait_for_completion_rpc_task(task); |
1258 | if (status != 0) { | |
1259 | data->cancelled = 1; | |
1260 | smp_wmb(); | |
1261 | } else | |
1262 | status = data->rpc_status; | |
e6b3c4db | 1263 | rpc_put_task(task); |
1da177e4 LT |
1264 | return status; |
1265 | } | |
1266 | ||
24ac23ab | 1267 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1268 | { |
24ac23ab TM |
1269 | struct nfs4_opendata *data = calldata; |
1270 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1271 | |
24ac23ab TM |
1272 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1273 | return; | |
aac00a8d TM |
1274 | /* |
1275 | * Check if we still need to send an OPEN call, or if we can use | |
1276 | * a delegation instead. | |
1277 | */ | |
1278 | if (data->state != NULL) { | |
1279 | struct nfs_delegation *delegation; | |
1280 | ||
dc0b027d | 1281 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1282 | goto out_no_action; |
aac00a8d TM |
1283 | rcu_read_lock(); |
1284 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1285 | if (delegation != NULL && | |
15c831bf | 1286 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1287 | rcu_read_unlock(); |
6ee41268 | 1288 | goto out_no_action; |
aac00a8d TM |
1289 | } |
1290 | rcu_read_unlock(); | |
1291 | } | |
24ac23ab | 1292 | /* Update sequence id. */ |
9f958ab8 | 1293 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 1294 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 1295 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1296 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1297 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1298 | } | |
26e976a8 | 1299 | data->timestamp = jiffies; |
d898528c AA |
1300 | if (nfs4_setup_sequence(data->o_arg.server->nfs_client, |
1301 | &data->o_arg.seq_args, | |
1302 | &data->o_res.seq_res, 1, task)) | |
1303 | return; | |
5138fde0 | 1304 | rpc_call_start(task); |
6ee41268 TM |
1305 | return; |
1306 | out_no_action: | |
1307 | task->tk_action = NULL; | |
1308 | ||
24ac23ab | 1309 | } |
1da177e4 | 1310 | |
24ac23ab TM |
1311 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1312 | { | |
1313 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1314 | |
24ac23ab | 1315 | data->rpc_status = task->tk_status; |
d898528c AA |
1316 | |
1317 | nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res, | |
1318 | task->tk_status); | |
1319 | ||
24ac23ab TM |
1320 | if (RPC_ASSASSINATED(task)) |
1321 | return; | |
1322 | if (task->tk_status == 0) { | |
1323 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1324 | case S_IFREG: |
1325 | break; | |
1326 | case S_IFLNK: | |
24ac23ab | 1327 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1328 | break; |
1329 | case S_IFDIR: | |
24ac23ab | 1330 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1331 | break; |
1332 | default: | |
24ac23ab | 1333 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1334 | } |
26e976a8 | 1335 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1336 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1337 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1338 | } |
3e309914 | 1339 | data->rpc_done = 1; |
24ac23ab | 1340 | } |
6f926b5b | 1341 | |
24ac23ab TM |
1342 | static void nfs4_open_release(void *calldata) |
1343 | { | |
1344 | struct nfs4_opendata *data = calldata; | |
1345 | struct nfs4_state *state = NULL; | |
1346 | ||
1347 | /* If this request hasn't been cancelled, do nothing */ | |
1348 | if (data->cancelled == 0) | |
1349 | goto out_free; | |
1350 | /* In case of error, no cleanup! */ | |
3e309914 | 1351 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1352 | goto out_free; |
1353 | /* In case we need an open_confirm, no cleanup! */ | |
1354 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1355 | goto out_free; | |
24ac23ab | 1356 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1357 | if (!IS_ERR(state)) |
dc0b027d | 1358 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1359 | out_free: |
c6d00e63 | 1360 | nfs4_opendata_put(data); |
24ac23ab TM |
1361 | } |
1362 | ||
1363 | static const struct rpc_call_ops nfs4_open_ops = { | |
1364 | .rpc_call_prepare = nfs4_open_prepare, | |
1365 | .rpc_call_done = nfs4_open_done, | |
1366 | .rpc_release = nfs4_open_release, | |
1367 | }; | |
1368 | ||
1369 | /* | |
1370 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1371 | */ | |
1372 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1373 | { | |
1374 | struct inode *dir = data->dir->d_inode; | |
1375 | struct nfs_server *server = NFS_SERVER(dir); | |
1376 | struct nfs_openargs *o_arg = &data->o_arg; | |
1377 | struct nfs_openres *o_res = &data->o_res; | |
1378 | struct rpc_task *task; | |
5138fde0 TM |
1379 | struct rpc_message msg = { |
1380 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1381 | .rpc_argp = o_arg, | |
1382 | .rpc_resp = o_res, | |
1383 | .rpc_cred = data->owner->so_cred, | |
1384 | }; | |
c970aa85 TM |
1385 | struct rpc_task_setup task_setup_data = { |
1386 | .rpc_client = server->client, | |
5138fde0 | 1387 | .rpc_message = &msg, |
c970aa85 TM |
1388 | .callback_ops = &nfs4_open_ops, |
1389 | .callback_data = data, | |
101070ca | 1390 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1391 | .flags = RPC_TASK_ASYNC, |
1392 | }; | |
24ac23ab TM |
1393 | int status; |
1394 | ||
c6d00e63 | 1395 | kref_get(&data->kref); |
3e309914 TM |
1396 | data->rpc_done = 0; |
1397 | data->rpc_status = 0; | |
2ced46c2 | 1398 | data->cancelled = 0; |
c970aa85 | 1399 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1400 | if (IS_ERR(task)) |
24ac23ab | 1401 | return PTR_ERR(task); |
24ac23ab TM |
1402 | status = nfs4_wait_for_completion_rpc_task(task); |
1403 | if (status != 0) { | |
1404 | data->cancelled = 1; | |
1405 | smp_wmb(); | |
1406 | } else | |
1407 | status = data->rpc_status; | |
e6b3c4db | 1408 | rpc_put_task(task); |
3e309914 | 1409 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1410 | return status; |
1411 | ||
9936781d TM |
1412 | if (o_res->fh.size == 0) |
1413 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1414 | ||
56ae19f3 TM |
1415 | if (o_arg->open_flags & O_CREAT) { |
1416 | update_changeattr(dir, &o_res->cinfo); | |
1417 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1418 | } else | |
1419 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1420 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1421 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1422 | if (status != 0) |
24ac23ab | 1423 | return status; |
1da177e4 LT |
1424 | } |
1425 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1426 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1427 | return 0; |
1da177e4 LT |
1428 | } |
1429 | ||
10afec90 | 1430 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1431 | { |
7539bbab | 1432 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1433 | int ret; |
58d9714a | 1434 | |
6b30954e | 1435 | for (;;) { |
65de872e | 1436 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1437 | if (ret != 0) |
1438 | return ret; | |
e598d843 TM |
1439 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1440 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1441 | break; |
58d9714a | 1442 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1443 | } |
1444 | return 0; | |
58d9714a TM |
1445 | } |
1446 | ||
1da177e4 LT |
1447 | /* |
1448 | * OPEN_EXPIRED: | |
1449 | * reclaim state on the server after a network partition. | |
1450 | * Assumes caller holds the appropriate lock | |
1451 | */ | |
539cd03a | 1452 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1453 | { |
e56e0b78 | 1454 | struct nfs4_opendata *opendata; |
864472e9 | 1455 | int ret; |
1da177e4 | 1456 | |
6f220ed5 TM |
1457 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1458 | if (IS_ERR(opendata)) | |
1459 | return PTR_ERR(opendata); | |
864472e9 | 1460 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1461 | if (ret == -ESTALE) |
539cd03a | 1462 | d_drop(ctx->path.dentry); |
c6d00e63 | 1463 | nfs4_opendata_put(opendata); |
864472e9 | 1464 | return ret; |
1da177e4 LT |
1465 | } |
1466 | ||
539cd03a | 1467 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1468 | { |
539cd03a | 1469 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1470 | struct nfs4_exception exception = { }; |
1471 | int err; | |
1472 | ||
1473 | do { | |
539cd03a | 1474 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1475 | if (err != -NFS4ERR_DELAY) |
1476 | break; | |
1477 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1478 | } while (exception.retry); |
1479 | return err; | |
1480 | } | |
1481 | ||
1da177e4 LT |
1482 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1483 | { | |
1da177e4 | 1484 | struct nfs_open_context *ctx; |
864472e9 | 1485 | int ret; |
1da177e4 | 1486 | |
864472e9 TM |
1487 | ctx = nfs4_state_find_open_context(state); |
1488 | if (IS_ERR(ctx)) | |
1489 | return PTR_ERR(ctx); | |
539cd03a | 1490 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1491 | put_nfs_open_context(ctx); |
1492 | return ret; | |
1da177e4 LT |
1493 | } |
1494 | ||
aa53ed54 JL |
1495 | /* |
1496 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1497 | * fields corresponding to attributes that were used to store the verifier. | |
1498 | * Make sure we clobber those fields in the later setattr call | |
1499 | */ | |
1500 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1501 | { | |
1502 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1503 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1504 | sattr->ia_valid |= ATTR_ATIME; | |
1505 | ||
1506 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1507 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1508 | sattr->ia_valid |= ATTR_MTIME; | |
1509 | } | |
1510 | ||
1da177e4 | 1511 | /* |
24ac23ab | 1512 | * Returns a referenced nfs4_state |
1da177e4 | 1513 | */ |
dc0b027d | 1514 | static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res) |
1da177e4 LT |
1515 | { |
1516 | struct nfs4_state_owner *sp; | |
1517 | struct nfs4_state *state = NULL; | |
1518 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1519 | struct nfs4_opendata *opendata; |
aac00a8d | 1520 | int status; |
1da177e4 LT |
1521 | |
1522 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1523 | status = -ENOMEM; |
1524 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1525 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1526 | goto out_err; | |
1527 | } | |
58d9714a TM |
1528 | status = nfs4_recover_expired_lease(server); |
1529 | if (status != 0) | |
b4454fe1 | 1530 | goto err_put_state_owner; |
aac00a8d | 1531 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1532 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1533 | status = -ENOMEM; |
dc0b027d | 1534 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1535 | if (opendata == NULL) |
95d35cb4 | 1536 | goto err_put_state_owner; |
1da177e4 | 1537 | |
aac00a8d TM |
1538 | if (path->dentry->d_inode != NULL) |
1539 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1540 | ||
24ac23ab | 1541 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1542 | if (status != 0) |
c6d00e63 | 1543 | goto err_opendata_put; |
1da177e4 | 1544 | |
aa53ed54 JL |
1545 | if (opendata->o_arg.open_flags & O_EXCL) |
1546 | nfs4_exclusive_attrset(opendata, sattr); | |
1547 | ||
24ac23ab | 1548 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1549 | status = PTR_ERR(state); |
1550 | if (IS_ERR(state)) | |
c6d00e63 | 1551 | goto err_opendata_put; |
c6d00e63 | 1552 | nfs4_opendata_put(opendata); |
1da177e4 | 1553 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1554 | *res = state; |
1555 | return 0; | |
c6d00e63 TM |
1556 | err_opendata_put: |
1557 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1558 | err_put_state_owner: |
1559 | nfs4_put_state_owner(sp); | |
1da177e4 | 1560 | out_err: |
1da177e4 LT |
1561 | *res = NULL; |
1562 | return status; | |
1563 | } | |
1564 | ||
1565 | ||
dc0b027d | 1566 | static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred) |
1da177e4 LT |
1567 | { |
1568 | struct nfs4_exception exception = { }; | |
1569 | struct nfs4_state *res; | |
1570 | int status; | |
1571 | ||
1572 | do { | |
dc0b027d | 1573 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1574 | if (status == 0) |
1575 | break; | |
1576 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1577 | * book-keeping w.r.t. state-changing operations | |
1578 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1579 | * It is actually a sign of a bug on the client or on the server. | |
1580 | * | |
1581 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1582 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1583 | * have unhashed the old state_owner for us, and that we can |
1584 | * therefore safely retry using a new one. We should still warn | |
1585 | * the user though... | |
1586 | */ | |
1587 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1588 | printk(KERN_WARNING "NFS: v4 server %s " |
1589 | " returned a bad sequence-id error!\n", | |
1590 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1591 | exception.retry = 1; |
1592 | continue; | |
1593 | } | |
550f5747 TM |
1594 | /* |
1595 | * BAD_STATEID on OPEN means that the server cancelled our | |
1596 | * state before it received the OPEN_CONFIRM. | |
1597 | * Recover by retrying the request as per the discussion | |
1598 | * on Page 181 of RFC3530. | |
1599 | */ | |
1600 | if (status == -NFS4ERR_BAD_STATEID) { | |
1601 | exception.retry = 1; | |
1602 | continue; | |
1603 | } | |
aac00a8d TM |
1604 | if (status == -EAGAIN) { |
1605 | /* We must have found a delegation */ | |
1606 | exception.retry = 1; | |
1607 | continue; | |
1608 | } | |
1da177e4 LT |
1609 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1610 | status, &exception)); | |
1611 | } while (exception.retry); | |
1612 | return res; | |
1613 | } | |
1614 | ||
659bfcd6 TM |
1615 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1616 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1617 | struct nfs4_state *state) | |
1da177e4 | 1618 | { |
3e4f6290 | 1619 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1620 | struct nfs_setattrargs arg = { |
3e4f6290 | 1621 | .fh = NFS_FH(inode), |
1da177e4 LT |
1622 | .iap = sattr, |
1623 | .server = server, | |
1624 | .bitmask = server->attr_bitmask, | |
1625 | }; | |
1626 | struct nfs_setattrres res = { | |
1627 | .fattr = fattr, | |
1628 | .server = server, | |
1629 | }; | |
1630 | struct rpc_message msg = { | |
659bfcd6 TM |
1631 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1632 | .rpc_argp = &arg, | |
1633 | .rpc_resp = &res, | |
1634 | .rpc_cred = cred, | |
1da177e4 | 1635 | }; |
26e976a8 | 1636 | unsigned long timestamp = jiffies; |
65e4308d | 1637 | int status; |
1da177e4 | 1638 | |
0e574af1 | 1639 | nfs_fattr_init(fattr); |
1da177e4 | 1640 | |
3e4f6290 TM |
1641 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1642 | /* Use that stateid */ | |
1643 | } else if (state != NULL) { | |
08e9eac4 TM |
1644 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1645 | } else | |
1da177e4 LT |
1646 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1647 | ||
cccef3b9 | 1648 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1649 | if (status == 0 && state != NULL) |
1650 | renew_lease(server, timestamp); | |
65e4308d | 1651 | return status; |
1da177e4 LT |
1652 | } |
1653 | ||
659bfcd6 TM |
1654 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1655 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1656 | struct nfs4_state *state) | |
1da177e4 | 1657 | { |
3e4f6290 | 1658 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1659 | struct nfs4_exception exception = { }; |
1660 | int err; | |
1661 | do { | |
1662 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1663 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1664 | &exception); |
1665 | } while (exception.retry); | |
1666 | return err; | |
1667 | } | |
1668 | ||
1669 | struct nfs4_closedata { | |
4a35bd41 | 1670 | struct path path; |
1da177e4 LT |
1671 | struct inode *inode; |
1672 | struct nfs4_state *state; | |
1673 | struct nfs_closeargs arg; | |
1674 | struct nfs_closeres res; | |
516a6af6 | 1675 | struct nfs_fattr fattr; |
26e976a8 | 1676 | unsigned long timestamp; |
1da177e4 LT |
1677 | }; |
1678 | ||
963d8fe5 | 1679 | static void nfs4_free_closedata(void *data) |
9512135d | 1680 | { |
963d8fe5 TM |
1681 | struct nfs4_closedata *calldata = data; |
1682 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1683 | |
1684 | nfs4_put_open_state(calldata->state); | |
1685 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1686 | nfs4_put_state_owner(sp); |
31f31db1 | 1687 | path_put(&calldata->path); |
9512135d TM |
1688 | kfree(calldata); |
1689 | } | |
1690 | ||
963d8fe5 | 1691 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1692 | { |
963d8fe5 | 1693 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1694 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1695 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1696 | ||
19ddab06 | 1697 | nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); |
4ce70ada TM |
1698 | if (RPC_ASSASSINATED(task)) |
1699 | return; | |
1da177e4 LT |
1700 | /* hmm. we are done with the inode, and in the process of freeing |
1701 | * the state_owner. we keep this around to process errors | |
1702 | */ | |
1da177e4 LT |
1703 | switch (task->tk_status) { |
1704 | case 0: | |
45328c35 | 1705 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1706 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1707 | break; |
1708 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1709 | case -NFS4ERR_OLD_STATEID: |
1710 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1711 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1712 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1713 | break; |
1da177e4 | 1714 | default: |
9e33bed5 | 1715 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
eedc020e | 1716 | nfs4_restart_rpc(task, server->nfs_client); |
1da177e4 LT |
1717 | return; |
1718 | } | |
1719 | } | |
19ddab06 | 1720 | nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res); |
516a6af6 | 1721 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1722 | } |
1723 | ||
4ce70ada | 1724 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1725 | { |
4ce70ada | 1726 | struct nfs4_closedata *calldata = data; |
9512135d | 1727 | struct nfs4_state *state = calldata->state; |
003707c7 | 1728 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1729 | |
963d8fe5 | 1730 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1731 | return; |
003707c7 | 1732 | |
003707c7 | 1733 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1734 | spin_lock(&state->owner->so_lock); |
003707c7 | 1735 | /* Calculate the change in open mode */ |
e7616923 | 1736 | if (state->n_rdwr == 0) { |
003707c7 | 1737 | if (state->n_rdonly == 0) { |
003707c7 TM |
1738 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1739 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1740 | } | |
1741 | if (state->n_wronly == 0) { | |
003707c7 TM |
1742 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1743 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1744 | } | |
e7616923 | 1745 | } |
4cecb76f | 1746 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1747 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1748 | /* Note: exit _without_ calling nfs4_close_done */ |
1749 | task->tk_action = NULL; | |
9512135d TM |
1750 | return; |
1751 | } | |
516a6af6 | 1752 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1753 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1754 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1755 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1756 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1757 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1758 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1759 | } |
26e976a8 | 1760 | calldata->timestamp = jiffies; |
19ddab06 AA |
1761 | if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client, |
1762 | &calldata->arg.seq_args, &calldata->res.seq_res, | |
1763 | 1, task)) | |
1764 | return; | |
5138fde0 | 1765 | rpc_call_start(task); |
1da177e4 LT |
1766 | } |
1767 | ||
963d8fe5 | 1768 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1769 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1770 | .rpc_call_done = nfs4_close_done, |
1771 | .rpc_release = nfs4_free_closedata, | |
1772 | }; | |
1773 | ||
1da177e4 LT |
1774 | /* |
1775 | * It is possible for data to be read/written from a mem-mapped file | |
1776 | * after the sys_close call (which hits the vfs layer as a flush). | |
1777 | * This means that we can't safely call nfsv4 close on a file until | |
1778 | * the inode is cleared. This in turn means that we are not good | |
1779 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1780 | * share state even when we are done with one of the three share | |
1781 | * stateid's in the inode. | |
1782 | * | |
1783 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1784 | */ | |
a49c3c77 | 1785 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1786 | { |
4a35bd41 | 1787 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1788 | struct nfs4_closedata *calldata; |
b39e625b TM |
1789 | struct nfs4_state_owner *sp = state->owner; |
1790 | struct rpc_task *task; | |
5138fde0 TM |
1791 | struct rpc_message msg = { |
1792 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1793 | .rpc_cred = state->owner->so_cred, | |
1794 | }; | |
c970aa85 TM |
1795 | struct rpc_task_setup task_setup_data = { |
1796 | .rpc_client = server->client, | |
5138fde0 | 1797 | .rpc_message = &msg, |
c970aa85 | 1798 | .callback_ops = &nfs4_close_ops, |
101070ca | 1799 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1800 | .flags = RPC_TASK_ASYNC, |
1801 | }; | |
9512135d | 1802 | int status = -ENOMEM; |
1da177e4 | 1803 | |
19ddab06 | 1804 | calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1805 | if (calldata == NULL) |
9512135d | 1806 | goto out; |
4a35bd41 | 1807 | calldata->inode = state->inode; |
1da177e4 | 1808 | calldata->state = state; |
4a35bd41 | 1809 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1810 | calldata->arg.stateid = &state->open_stateid; |
34dc1ad7 BH |
1811 | if (nfs4_has_session(server->nfs_client)) |
1812 | memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */ | |
1da177e4 | 1813 | /* Serialization for the sequence id */ |
cee54fc9 | 1814 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1815 | if (calldata->arg.seqid == NULL) |
1816 | goto out_free_calldata; | |
dc0b027d | 1817 | calldata->arg.fmode = 0; |
a65318bf | 1818 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1819 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1820 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1821 | calldata->res.server = server; |
5f7dbd5c | 1822 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
4a35bd41 TM |
1823 | calldata->path.mnt = mntget(path->mnt); |
1824 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1825 | |
5138fde0 TM |
1826 | msg.rpc_argp = &calldata->arg, |
1827 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1828 | task_setup_data.callback_data = calldata; |
1829 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1830 | if (IS_ERR(task)) |
1831 | return PTR_ERR(task); | |
a49c3c77 TM |
1832 | status = 0; |
1833 | if (wait) | |
1834 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1835 | rpc_put_task(task); |
a49c3c77 | 1836 | return status; |
9512135d TM |
1837 | out_free_calldata: |
1838 | kfree(calldata); | |
1839 | out: | |
b39e625b TM |
1840 | nfs4_put_open_state(state); |
1841 | nfs4_put_state_owner(sp); | |
9512135d | 1842 | return status; |
1da177e4 LT |
1843 | } |
1844 | ||
dc0b027d | 1845 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1846 | { |
1847 | struct file *filp; | |
1b45c46c | 1848 | int ret; |
02a913a7 | 1849 | |
1b45c46c | 1850 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1851 | if (fmode & FMODE_EXEC) { |
af22f94a | 1852 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1853 | state->owner->so_cred, |
1854 | nd->intent.open.flags); | |
1855 | if (ret < 0) | |
1856 | goto out_close; | |
1857 | } | |
4a35bd41 | 1858 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1859 | if (!IS_ERR(filp)) { |
1860 | struct nfs_open_context *ctx; | |
cd3758e3 | 1861 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1862 | ctx->state = state; |
95cf959b TM |
1863 | return 0; |
1864 | } | |
1b45c46c TM |
1865 | ret = PTR_ERR(filp); |
1866 | out_close: | |
dc0b027d | 1867 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1868 | return ret; |
02a913a7 TM |
1869 | } |
1870 | ||
1871 | struct dentry * | |
1da177e4 LT |
1872 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1873 | { | |
ad389da7 | 1874 | struct path path = { |
4ac91378 | 1875 | .mnt = nd->path.mnt, |
ad389da7 TM |
1876 | .dentry = dentry, |
1877 | }; | |
4ac91378 | 1878 | struct dentry *parent; |
1da177e4 LT |
1879 | struct iattr attr; |
1880 | struct rpc_cred *cred; | |
1881 | struct nfs4_state *state; | |
02a913a7 | 1882 | struct dentry *res; |
dc0b027d | 1883 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1884 | |
1885 | if (nd->flags & LOOKUP_CREATE) { | |
1886 | attr.ia_mode = nd->intent.open.create_mode; | |
1887 | attr.ia_valid = ATTR_MODE; | |
1888 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 1889 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
1890 | } else { |
1891 | attr.ia_valid = 0; | |
1892 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1893 | } | |
1894 | ||
98a8e323 | 1895 | cred = rpc_lookup_cred(); |
1da177e4 | 1896 | if (IS_ERR(cred)) |
02a913a7 | 1897 | return (struct dentry *)cred; |
565277f6 TM |
1898 | parent = dentry->d_parent; |
1899 | /* Protect against concurrent sillydeletes */ | |
1900 | nfs_block_sillyrename(parent); | |
dc0b027d | 1901 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1902 | put_rpccred(cred); |
02a913a7 | 1903 | if (IS_ERR(state)) { |
d75340cc | 1904 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1905 | d_add(dentry, NULL); |
d75340cc TM |
1906 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1907 | } | |
565277f6 | 1908 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1909 | return (struct dentry *)state; |
1910 | } | |
24ac23ab | 1911 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1912 | if (res != NULL) |
deee9369 | 1913 | path.dentry = res; |
d75340cc | 1914 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1915 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1916 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1917 | return res; |
1da177e4 LT |
1918 | } |
1919 | ||
1920 | int | |
02a913a7 | 1921 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1922 | { |
ad389da7 | 1923 | struct path path = { |
4ac91378 | 1924 | .mnt = nd->path.mnt, |
ad389da7 TM |
1925 | .dentry = dentry, |
1926 | }; | |
1da177e4 LT |
1927 | struct rpc_cred *cred; |
1928 | struct nfs4_state *state; | |
dc0b027d | 1929 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1930 | |
98a8e323 | 1931 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1932 | if (IS_ERR(cred)) |
1933 | return PTR_ERR(cred); | |
dc0b027d | 1934 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1935 | put_rpccred(cred); |
02a913a7 TM |
1936 | if (IS_ERR(state)) { |
1937 | switch (PTR_ERR(state)) { | |
1938 | case -EPERM: | |
1939 | case -EACCES: | |
1940 | case -EDQUOT: | |
1941 | case -ENOSPC: | |
1942 | case -EROFS: | |
1943 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1944 | return 1; | |
b87c0adf CL |
1945 | default: |
1946 | goto out_drop; | |
02a913a7 | 1947 | } |
02a913a7 | 1948 | } |
24ac23ab | 1949 | if (state->inode == dentry->d_inode) { |
d75340cc | 1950 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1951 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1952 | return 1; |
1953 | } | |
dc0b027d | 1954 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1955 | out_drop: |
1956 | d_drop(dentry); | |
1da177e4 LT |
1957 | return 0; |
1958 | } | |
1959 | ||
7fe5c398 TM |
1960 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
1961 | { | |
1962 | if (ctx->state == NULL) | |
1963 | return; | |
1964 | if (is_sync) | |
1965 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1966 | else | |
1967 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1968 | } | |
1da177e4 LT |
1969 | |
1970 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1971 | { | |
43652ad5 BH |
1972 | struct nfs4_server_caps_arg args = { |
1973 | .fhandle = fhandle, | |
1974 | }; | |
1da177e4 LT |
1975 | struct nfs4_server_caps_res res = {}; |
1976 | struct rpc_message msg = { | |
1977 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 1978 | .rpc_argp = &args, |
1da177e4 LT |
1979 | .rpc_resp = &res, |
1980 | }; | |
1981 | int status; | |
1982 | ||
cccef3b9 | 1983 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1984 | if (status == 0) { |
1985 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1986 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1987 | server->caps |= NFS_CAP_ACLS; | |
1988 | if (res.has_links != 0) | |
1989 | server->caps |= NFS_CAP_HARDLINKS; | |
1990 | if (res.has_symlinks != 0) | |
1991 | server->caps |= NFS_CAP_SYMLINKS; | |
a65318bf TM |
1992 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
1993 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1994 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
1995 | server->acl_bitmask = res.acl_bitmask; |
1996 | } | |
cccef3b9 | 1997 | |
1da177e4 LT |
1998 | return status; |
1999 | } | |
2000 | ||
55a97593 | 2001 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
2002 | { |
2003 | struct nfs4_exception exception = { }; | |
2004 | int err; | |
2005 | do { | |
2006 | err = nfs4_handle_exception(server, | |
2007 | _nfs4_server_capabilities(server, fhandle), | |
2008 | &exception); | |
2009 | } while (exception.retry); | |
2010 | return err; | |
2011 | } | |
2012 | ||
2013 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2014 | struct nfs_fsinfo *info) | |
2015 | { | |
1da177e4 LT |
2016 | struct nfs4_lookup_root_arg args = { |
2017 | .bitmask = nfs4_fattr_bitmap, | |
2018 | }; | |
2019 | struct nfs4_lookup_res res = { | |
2020 | .server = server, | |
0e574af1 | 2021 | .fattr = info->fattr, |
1da177e4 LT |
2022 | .fh = fhandle, |
2023 | }; | |
2024 | struct rpc_message msg = { | |
2025 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2026 | .rpc_argp = &args, | |
2027 | .rpc_resp = &res, | |
2028 | }; | |
008f55d0 BH |
2029 | int status; |
2030 | ||
0e574af1 | 2031 | nfs_fattr_init(info->fattr); |
008f55d0 BH |
2032 | status = nfs4_recover_expired_lease(server); |
2033 | if (!status) | |
2034 | status = nfs4_check_client_ready(server->nfs_client); | |
2035 | if (!status) | |
2036 | status = nfs4_call_sync(server, &msg, &args, &res, 0); | |
2037 | return status; | |
1da177e4 LT |
2038 | } |
2039 | ||
2040 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2041 | struct nfs_fsinfo *info) | |
2042 | { | |
2043 | struct nfs4_exception exception = { }; | |
2044 | int err; | |
2045 | do { | |
2046 | err = nfs4_handle_exception(server, | |
2047 | _nfs4_lookup_root(server, fhandle, info), | |
2048 | &exception); | |
2049 | } while (exception.retry); | |
2050 | return err; | |
2051 | } | |
2052 | ||
54ceac45 DH |
2053 | /* |
2054 | * get the file handle for the "/" directory on the server | |
2055 | */ | |
1da177e4 | 2056 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 2057 | struct nfs_fsinfo *info) |
1da177e4 | 2058 | { |
1da177e4 LT |
2059 | int status; |
2060 | ||
1da177e4 | 2061 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2062 | if (status == 0) |
2063 | status = nfs4_server_capabilities(server, fhandle); | |
2064 | if (status == 0) | |
2065 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2066 | return nfs4_map_errors(status); |
1da177e4 LT |
2067 | } |
2068 | ||
6b97fd3d MN |
2069 | /* |
2070 | * Get locations and (maybe) other attributes of a referral. | |
2071 | * Note that we'll actually follow the referral later when | |
2072 | * we detect fsid mismatch in inode revalidation | |
2073 | */ | |
56659e99 | 2074 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2075 | { |
2076 | int status = -ENOMEM; | |
2077 | struct page *page = NULL; | |
2078 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2079 | |
2080 | page = alloc_page(GFP_KERNEL); | |
2081 | if (page == NULL) | |
2082 | goto out; | |
2083 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2084 | if (locations == NULL) | |
2085 | goto out; | |
2086 | ||
c228fd3a | 2087 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2088 | if (status != 0) |
2089 | goto out; | |
2090 | /* Make sure server returned a different fsid for the referral */ | |
2091 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2092 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2093 | status = -EIO; |
2094 | goto out; | |
2095 | } | |
2096 | ||
2097 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2098 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2099 | if (!fattr->mode) | |
2100 | fattr->mode = S_IFDIR; | |
2101 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2102 | out: | |
2103 | if (page) | |
2104 | __free_page(page); | |
2105 | if (locations) | |
2106 | kfree(locations); | |
2107 | return status; | |
2108 | } | |
2109 | ||
1da177e4 LT |
2110 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2111 | { | |
2112 | struct nfs4_getattr_arg args = { | |
2113 | .fh = fhandle, | |
2114 | .bitmask = server->attr_bitmask, | |
2115 | }; | |
2116 | struct nfs4_getattr_res res = { | |
2117 | .fattr = fattr, | |
2118 | .server = server, | |
2119 | }; | |
2120 | struct rpc_message msg = { | |
2121 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2122 | .rpc_argp = &args, | |
2123 | .rpc_resp = &res, | |
2124 | }; | |
2125 | ||
0e574af1 | 2126 | nfs_fattr_init(fattr); |
cccef3b9 | 2127 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2128 | } |
2129 | ||
2130 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2131 | { | |
2132 | struct nfs4_exception exception = { }; | |
2133 | int err; | |
2134 | do { | |
2135 | err = nfs4_handle_exception(server, | |
2136 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2137 | &exception); | |
2138 | } while (exception.retry); | |
2139 | return err; | |
2140 | } | |
2141 | ||
2142 | /* | |
2143 | * The file is not closed if it is opened due to the a request to change | |
2144 | * the size of the file. The open call will not be needed once the | |
2145 | * VFS layer lookup-intents are implemented. | |
2146 | * | |
2147 | * Close is called when the inode is destroyed. | |
2148 | * If we haven't opened the file for O_WRONLY, we | |
2149 | * need to in the size_change case to obtain a stateid. | |
2150 | * | |
2151 | * Got race? | |
2152 | * Because OPEN is always done by name in nfsv4, it is | |
2153 | * possible that we opened a different file by the same | |
2154 | * name. We can recognize this race condition, but we | |
2155 | * can't do anything about it besides returning an error. | |
2156 | * | |
2157 | * This will be fixed with VFS changes (lookup-intent). | |
2158 | */ | |
2159 | static int | |
2160 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2161 | struct iattr *sattr) | |
2162 | { | |
08e9eac4 | 2163 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2164 | struct rpc_cred *cred = NULL; |
d530838b | 2165 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2166 | int status; |
2167 | ||
0e574af1 | 2168 | nfs_fattr_init(fattr); |
1da177e4 | 2169 | |
d530838b | 2170 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2171 | if (sattr->ia_valid & ATTR_FILE) { |
2172 | struct nfs_open_context *ctx; | |
2173 | ||
2174 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2175 | if (ctx) { |
2176 | cred = ctx->cred; | |
2177 | state = ctx->state; | |
2178 | } | |
659bfcd6 | 2179 | } |
08e9eac4 | 2180 | |
659bfcd6 | 2181 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2182 | if (status == 0) |
2183 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2184 | return status; |
2185 | } | |
2186 | ||
56659e99 TM |
2187 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2188 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2189 | struct nfs_fattr *fattr) |
2190 | { | |
2191 | int status; | |
2192 | struct nfs4_lookup_arg args = { | |
2193 | .bitmask = server->attr_bitmask, | |
2194 | .dir_fh = dirfh, | |
2195 | .name = name, | |
2196 | }; | |
2197 | struct nfs4_lookup_res res = { | |
2198 | .server = server, | |
2199 | .fattr = fattr, | |
2200 | .fh = fhandle, | |
2201 | }; | |
2202 | struct rpc_message msg = { | |
2203 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2204 | .rpc_argp = &args, | |
2205 | .rpc_resp = &res, | |
2206 | }; | |
2207 | ||
2208 | nfs_fattr_init(fattr); | |
2209 | ||
2210 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2211 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2212 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2213 | return status; |
2214 | } | |
2215 | ||
2216 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2217 | struct qstr *name, struct nfs_fh *fhandle, | |
2218 | struct nfs_fattr *fattr) | |
2219 | { | |
2220 | struct nfs4_exception exception = { }; | |
2221 | int err; | |
2222 | do { | |
4e56e082 TM |
2223 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2224 | /* FIXME: !!!! */ | |
2225 | if (err == -NFS4ERR_MOVED) { | |
2226 | err = -EREMOTE; | |
2227 | break; | |
2228 | } | |
2229 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2230 | } while (exception.retry); |
2231 | return err; | |
2232 | } | |
2233 | ||
56659e99 | 2234 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2235 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2236 | { | |
4e56e082 | 2237 | int status; |
1da177e4 LT |
2238 | |
2239 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2240 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2241 | if (status == -NFS4ERR_MOVED) |
2242 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2243 | dprintk("NFS reply lookup: %d\n", status); |
2244 | return status; | |
2245 | } | |
2246 | ||
2247 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2248 | { | |
2249 | struct nfs4_exception exception = { }; | |
2250 | int err; | |
2251 | do { | |
2252 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2253 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2254 | &exception); | |
2255 | } while (exception.retry); | |
2256 | return err; | |
2257 | } | |
2258 | ||
2259 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2260 | { | |
76b32999 TM |
2261 | struct nfs_server *server = NFS_SERVER(inode); |
2262 | struct nfs_fattr fattr; | |
1da177e4 LT |
2263 | struct nfs4_accessargs args = { |
2264 | .fh = NFS_FH(inode), | |
76b32999 TM |
2265 | .bitmask = server->attr_bitmask, |
2266 | }; | |
2267 | struct nfs4_accessres res = { | |
2268 | .server = server, | |
2269 | .fattr = &fattr, | |
1da177e4 | 2270 | }; |
1da177e4 LT |
2271 | struct rpc_message msg = { |
2272 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2273 | .rpc_argp = &args, | |
2274 | .rpc_resp = &res, | |
2275 | .rpc_cred = entry->cred, | |
2276 | }; | |
2277 | int mode = entry->mask; | |
2278 | int status; | |
2279 | ||
2280 | /* | |
2281 | * Determine which access bits we want to ask for... | |
2282 | */ | |
2283 | if (mode & MAY_READ) | |
2284 | args.access |= NFS4_ACCESS_READ; | |
2285 | if (S_ISDIR(inode->i_mode)) { | |
2286 | if (mode & MAY_WRITE) | |
2287 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2288 | if (mode & MAY_EXEC) | |
2289 | args.access |= NFS4_ACCESS_LOOKUP; | |
2290 | } else { | |
2291 | if (mode & MAY_WRITE) | |
2292 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2293 | if (mode & MAY_EXEC) | |
2294 | args.access |= NFS4_ACCESS_EXECUTE; | |
2295 | } | |
76b32999 | 2296 | nfs_fattr_init(&fattr); |
cccef3b9 | 2297 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2298 | if (!status) { |
2299 | entry->mask = 0; | |
2300 | if (res.access & NFS4_ACCESS_READ) | |
2301 | entry->mask |= MAY_READ; | |
2302 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2303 | entry->mask |= MAY_WRITE; | |
2304 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2305 | entry->mask |= MAY_EXEC; | |
76b32999 | 2306 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
2307 | } |
2308 | return status; | |
2309 | } | |
2310 | ||
2311 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2312 | { | |
2313 | struct nfs4_exception exception = { }; | |
2314 | int err; | |
2315 | do { | |
2316 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2317 | _nfs4_proc_access(inode, entry), | |
2318 | &exception); | |
2319 | } while (exception.retry); | |
2320 | return err; | |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * TODO: For the time being, we don't try to get any attributes | |
2325 | * along with any of the zero-copy operations READ, READDIR, | |
2326 | * READLINK, WRITE. | |
2327 | * | |
2328 | * In the case of the first three, we want to put the GETATTR | |
2329 | * after the read-type operation -- this is because it is hard | |
2330 | * to predict the length of a GETATTR response in v4, and thus | |
2331 | * align the READ data correctly. This means that the GETATTR | |
2332 | * may end up partially falling into the page cache, and we should | |
2333 | * shift it into the 'tail' of the xdr_buf before processing. | |
2334 | * To do this efficiently, we need to know the total length | |
2335 | * of data received, which doesn't seem to be available outside | |
2336 | * of the RPC layer. | |
2337 | * | |
2338 | * In the case of WRITE, we also want to put the GETATTR after | |
2339 | * the operation -- in this case because we want to make sure | |
2340 | * we get the post-operation mtime and size. This means that | |
2341 | * we can't use xdr_encode_pages() as written: we need a variant | |
2342 | * of it which would leave room in the 'tail' iovec. | |
2343 | * | |
2344 | * Both of these changes to the XDR layer would in fact be quite | |
2345 | * minor, but I decided to leave them for a subsequent patch. | |
2346 | */ | |
2347 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2348 | unsigned int pgbase, unsigned int pglen) | |
2349 | { | |
2350 | struct nfs4_readlink args = { | |
2351 | .fh = NFS_FH(inode), | |
2352 | .pgbase = pgbase, | |
2353 | .pglen = pglen, | |
2354 | .pages = &page, | |
2355 | }; | |
f50c7000 | 2356 | struct nfs4_readlink_res res; |
1da177e4 LT |
2357 | struct rpc_message msg = { |
2358 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2359 | .rpc_argp = &args, | |
f50c7000 | 2360 | .rpc_resp = &res, |
1da177e4 LT |
2361 | }; |
2362 | ||
cccef3b9 | 2363 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2364 | } |
2365 | ||
2366 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2367 | unsigned int pgbase, unsigned int pglen) | |
2368 | { | |
2369 | struct nfs4_exception exception = { }; | |
2370 | int err; | |
2371 | do { | |
2372 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2373 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2374 | &exception); | |
2375 | } while (exception.retry); | |
2376 | return err; | |
2377 | } | |
2378 | ||
1da177e4 LT |
2379 | /* |
2380 | * Got race? | |
2381 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2382 | * Until then, this create/open method is prone to inefficiency and race | |
2383 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2384 | * placed on the wire. | |
2385 | * | |
2386 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2387 | * The file will be opened again in the subsequent VFS open call | |
2388 | * (nfs4_proc_file_open). | |
2389 | * | |
2390 | * The open for read will just hang around to be used by any process that | |
2391 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2392 | */ | |
2393 | ||
2394 | static int | |
2395 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2396 | int flags, struct nameidata *nd) |
1da177e4 | 2397 | { |
ad389da7 | 2398 | struct path path = { |
4ac91378 | 2399 | .mnt = nd->path.mnt, |
ad389da7 TM |
2400 | .dentry = dentry, |
2401 | }; | |
1da177e4 LT |
2402 | struct nfs4_state *state; |
2403 | struct rpc_cred *cred; | |
dc0b027d | 2404 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2405 | int status = 0; |
2406 | ||
98a8e323 | 2407 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2408 | if (IS_ERR(cred)) { |
2409 | status = PTR_ERR(cred); | |
2410 | goto out; | |
2411 | } | |
dc0b027d | 2412 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2413 | d_drop(dentry); |
1da177e4 LT |
2414 | if (IS_ERR(state)) { |
2415 | status = PTR_ERR(state); | |
659bfcd6 | 2416 | goto out_putcred; |
1da177e4 | 2417 | } |
d4d9cdcb | 2418 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2419 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2420 | if (flags & O_EXCL) { |
2421 | struct nfs_fattr fattr; | |
659bfcd6 | 2422 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2423 | if (status == 0) |
65e4308d | 2424 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2425 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2426 | } |
ad389da7 | 2427 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2428 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2429 | else |
dc0b027d | 2430 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2431 | out_putcred: |
2432 | put_rpccred(cred); | |
1da177e4 LT |
2433 | out: |
2434 | return status; | |
2435 | } | |
2436 | ||
2437 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2438 | { | |
16e42959 | 2439 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2440 | struct nfs_removeargs args = { |
1da177e4 | 2441 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2442 | .name.len = name->len, |
2443 | .name.name = name->name, | |
16e42959 TM |
2444 | .bitmask = server->attr_bitmask, |
2445 | }; | |
4fdc17b2 | 2446 | struct nfs_removeres res = { |
16e42959 | 2447 | .server = server, |
1da177e4 | 2448 | }; |
1da177e4 | 2449 | struct rpc_message msg = { |
4fdc17b2 TM |
2450 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2451 | .rpc_argp = &args, | |
2452 | .rpc_resp = &res, | |
1da177e4 LT |
2453 | }; |
2454 | int status; | |
2455 | ||
4fdc17b2 | 2456 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2457 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2458 | if (status == 0) { |
2459 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2460 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2461 | } |
1da177e4 LT |
2462 | return status; |
2463 | } | |
2464 | ||
2465 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2466 | { | |
2467 | struct nfs4_exception exception = { }; | |
2468 | int err; | |
2469 | do { | |
2470 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2471 | _nfs4_proc_remove(dir, name), | |
2472 | &exception); | |
2473 | } while (exception.retry); | |
2474 | return err; | |
2475 | } | |
2476 | ||
e4eff1a6 | 2477 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2478 | { |
e4eff1a6 TM |
2479 | struct nfs_server *server = NFS_SERVER(dir); |
2480 | struct nfs_removeargs *args = msg->rpc_argp; | |
2481 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2482 | |
a65318bf | 2483 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2484 | res->server = server; |
1da177e4 | 2485 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2486 | } |
2487 | ||
e4eff1a6 | 2488 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2489 | { |
e4eff1a6 TM |
2490 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2491 | ||
472cfbd9 | 2492 | nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); |
9e33bed5 | 2493 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 | 2494 | return 0; |
472cfbd9 | 2495 | nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res); |
e4eff1a6 TM |
2496 | update_changeattr(dir, &res->cinfo); |
2497 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2498 | return 1; | |
1da177e4 LT |
2499 | } |
2500 | ||
2501 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2502 | struct inode *new_dir, struct qstr *new_name) | |
2503 | { | |
6caf2c82 | 2504 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2505 | struct nfs4_rename_arg arg = { |
2506 | .old_dir = NFS_FH(old_dir), | |
2507 | .new_dir = NFS_FH(new_dir), | |
2508 | .old_name = old_name, | |
2509 | .new_name = new_name, | |
6caf2c82 TM |
2510 | .bitmask = server->attr_bitmask, |
2511 | }; | |
2512 | struct nfs_fattr old_fattr, new_fattr; | |
2513 | struct nfs4_rename_res res = { | |
2514 | .server = server, | |
2515 | .old_fattr = &old_fattr, | |
2516 | .new_fattr = &new_fattr, | |
1da177e4 | 2517 | }; |
1da177e4 LT |
2518 | struct rpc_message msg = { |
2519 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2520 | .rpc_argp = &arg, | |
2521 | .rpc_resp = &res, | |
2522 | }; | |
2523 | int status; | |
2524 | ||
6caf2c82 TM |
2525 | nfs_fattr_init(res.old_fattr); |
2526 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2527 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2528 | |
2529 | if (!status) { | |
2530 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2531 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2532 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2533 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2534 | } |
2535 | return status; | |
2536 | } | |
2537 | ||
2538 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2539 | struct inode *new_dir, struct qstr *new_name) | |
2540 | { | |
2541 | struct nfs4_exception exception = { }; | |
2542 | int err; | |
2543 | do { | |
2544 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2545 | _nfs4_proc_rename(old_dir, old_name, | |
2546 | new_dir, new_name), | |
2547 | &exception); | |
2548 | } while (exception.retry); | |
2549 | return err; | |
2550 | } | |
2551 | ||
2552 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2553 | { | |
91ba2eee | 2554 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2555 | struct nfs4_link_arg arg = { |
2556 | .fh = NFS_FH(inode), | |
2557 | .dir_fh = NFS_FH(dir), | |
2558 | .name = name, | |
91ba2eee TM |
2559 | .bitmask = server->attr_bitmask, |
2560 | }; | |
2561 | struct nfs_fattr fattr, dir_attr; | |
2562 | struct nfs4_link_res res = { | |
2563 | .server = server, | |
2564 | .fattr = &fattr, | |
2565 | .dir_attr = &dir_attr, | |
1da177e4 | 2566 | }; |
1da177e4 LT |
2567 | struct rpc_message msg = { |
2568 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2569 | .rpc_argp = &arg, | |
91ba2eee | 2570 | .rpc_resp = &res, |
1da177e4 LT |
2571 | }; |
2572 | int status; | |
2573 | ||
91ba2eee TM |
2574 | nfs_fattr_init(res.fattr); |
2575 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2576 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2577 | if (!status) { |
2578 | update_changeattr(dir, &res.cinfo); | |
2579 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2580 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2581 | } |
1da177e4 LT |
2582 | |
2583 | return status; | |
2584 | } | |
2585 | ||
2586 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2587 | { | |
2588 | struct nfs4_exception exception = { }; | |
2589 | int err; | |
2590 | do { | |
2591 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2592 | _nfs4_proc_link(inode, dir, name), | |
2593 | &exception); | |
2594 | } while (exception.retry); | |
2595 | return err; | |
2596 | } | |
2597 | ||
57dc9a57 TM |
2598 | struct nfs4_createdata { |
2599 | struct rpc_message msg; | |
2600 | struct nfs4_create_arg arg; | |
2601 | struct nfs4_create_res res; | |
2602 | struct nfs_fh fh; | |
2603 | struct nfs_fattr fattr; | |
2604 | struct nfs_fattr dir_fattr; | |
2605 | }; | |
2606 | ||
2607 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2608 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2609 | { | |
2610 | struct nfs4_createdata *data; | |
2611 | ||
2612 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2613 | if (data != NULL) { | |
2614 | struct nfs_server *server = NFS_SERVER(dir); | |
2615 | ||
2616 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2617 | data->msg.rpc_argp = &data->arg; | |
2618 | data->msg.rpc_resp = &data->res; | |
2619 | data->arg.dir_fh = NFS_FH(dir); | |
2620 | data->arg.server = server; | |
2621 | data->arg.name = name; | |
2622 | data->arg.attrs = sattr; | |
2623 | data->arg.ftype = ftype; | |
2624 | data->arg.bitmask = server->attr_bitmask; | |
2625 | data->res.server = server; | |
2626 | data->res.fh = &data->fh; | |
2627 | data->res.fattr = &data->fattr; | |
2628 | data->res.dir_fattr = &data->dir_fattr; | |
2629 | nfs_fattr_init(data->res.fattr); | |
2630 | nfs_fattr_init(data->res.dir_fattr); | |
2631 | } | |
2632 | return data; | |
2633 | } | |
2634 | ||
2635 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2636 | { | |
cccef3b9 AA |
2637 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2638 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2639 | if (status == 0) { |
2640 | update_changeattr(dir, &data->res.dir_cinfo); | |
2641 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2642 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2643 | } | |
2644 | return status; | |
2645 | } | |
2646 | ||
2647 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2648 | { | |
2649 | kfree(data); | |
2650 | } | |
2651 | ||
4f390c15 | 2652 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2653 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2654 | { |
57dc9a57 TM |
2655 | struct nfs4_createdata *data; |
2656 | int status = -ENAMETOOLONG; | |
1da177e4 | 2657 | |
94a6d753 | 2658 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2659 | goto out; |
4f390c15 | 2660 | |
57dc9a57 TM |
2661 | status = -ENOMEM; |
2662 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2663 | if (data == NULL) | |
2664 | goto out; | |
2665 | ||
2666 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2667 | data->arg.u.symlink.pages = &page; | |
2668 | data->arg.u.symlink.len = len; | |
1da177e4 | 2669 | |
57dc9a57 TM |
2670 | status = nfs4_do_create(dir, dentry, data); |
2671 | ||
2672 | nfs4_free_createdata(data); | |
2673 | out: | |
1da177e4 LT |
2674 | return status; |
2675 | } | |
2676 | ||
4f390c15 | 2677 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2678 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2679 | { |
2680 | struct nfs4_exception exception = { }; | |
2681 | int err; | |
2682 | do { | |
2683 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2684 | _nfs4_proc_symlink(dir, dentry, page, |
2685 | len, sattr), | |
1da177e4 LT |
2686 | &exception); |
2687 | } while (exception.retry); | |
2688 | return err; | |
2689 | } | |
2690 | ||
2691 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2692 | struct iattr *sattr) | |
2693 | { | |
57dc9a57 TM |
2694 | struct nfs4_createdata *data; |
2695 | int status = -ENOMEM; | |
1da177e4 | 2696 | |
57dc9a57 TM |
2697 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2698 | if (data == NULL) | |
2699 | goto out; | |
2700 | ||
2701 | status = nfs4_do_create(dir, dentry, data); | |
2702 | ||
2703 | nfs4_free_createdata(data); | |
2704 | out: | |
1da177e4 LT |
2705 | return status; |
2706 | } | |
2707 | ||
2708 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2709 | struct iattr *sattr) | |
2710 | { | |
2711 | struct nfs4_exception exception = { }; | |
2712 | int err; | |
2713 | do { | |
2714 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2715 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2716 | &exception); | |
2717 | } while (exception.retry); | |
2718 | return err; | |
2719 | } | |
2720 | ||
2721 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2722 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2723 | { | |
2724 | struct inode *dir = dentry->d_inode; | |
2725 | struct nfs4_readdir_arg args = { | |
2726 | .fh = NFS_FH(dir), | |
2727 | .pages = &page, | |
2728 | .pgbase = 0, | |
2729 | .count = count, | |
a65318bf | 2730 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, |
1da177e4 LT |
2731 | }; |
2732 | struct nfs4_readdir_res res; | |
2733 | struct rpc_message msg = { | |
2734 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2735 | .rpc_argp = &args, | |
2736 | .rpc_resp = &res, | |
2737 | .rpc_cred = cred, | |
2738 | }; | |
2739 | int status; | |
2740 | ||
3110ff80 | 2741 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2742 | dentry->d_parent->d_name.name, |
2743 | dentry->d_name.name, | |
2744 | (unsigned long long)cookie); | |
1da177e4 LT |
2745 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2746 | res.pgbase = args.pgbase; | |
cccef3b9 | 2747 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2748 | if (status == 0) |
2749 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2750 | |
2751 | nfs_invalidate_atime(dir); | |
2752 | ||
3110ff80 | 2753 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2754 | return status; |
2755 | } | |
2756 | ||
2757 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2758 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2759 | { | |
2760 | struct nfs4_exception exception = { }; | |
2761 | int err; | |
2762 | do { | |
2763 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2764 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2765 | page, count, plus), | |
2766 | &exception); | |
2767 | } while (exception.retry); | |
2768 | return err; | |
2769 | } | |
2770 | ||
2771 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2772 | struct iattr *sattr, dev_t rdev) | |
2773 | { | |
57dc9a57 TM |
2774 | struct nfs4_createdata *data; |
2775 | int mode = sattr->ia_mode; | |
2776 | int status = -ENOMEM; | |
1da177e4 LT |
2777 | |
2778 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2779 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2780 | |
2781 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2782 | if (data == NULL) | |
2783 | goto out; | |
2784 | ||
1da177e4 | 2785 | if (S_ISFIFO(mode)) |
57dc9a57 | 2786 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2787 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2788 | data->arg.ftype = NF4BLK; |
2789 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2790 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2791 | } |
2792 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2793 | data->arg.ftype = NF4CHR; |
2794 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2795 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2796 | } |
1da177e4 | 2797 | |
57dc9a57 TM |
2798 | status = nfs4_do_create(dir, dentry, data); |
2799 | ||
2800 | nfs4_free_createdata(data); | |
2801 | out: | |
1da177e4 LT |
2802 | return status; |
2803 | } | |
2804 | ||
2805 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2806 | struct iattr *sattr, dev_t rdev) | |
2807 | { | |
2808 | struct nfs4_exception exception = { }; | |
2809 | int err; | |
2810 | do { | |
2811 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2812 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2813 | &exception); | |
2814 | } while (exception.retry); | |
2815 | return err; | |
2816 | } | |
2817 | ||
2818 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2819 | struct nfs_fsstat *fsstat) | |
2820 | { | |
2821 | struct nfs4_statfs_arg args = { | |
2822 | .fh = fhandle, | |
2823 | .bitmask = server->attr_bitmask, | |
2824 | }; | |
24ad148a BH |
2825 | struct nfs4_statfs_res res = { |
2826 | .fsstat = fsstat, | |
2827 | }; | |
1da177e4 LT |
2828 | struct rpc_message msg = { |
2829 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2830 | .rpc_argp = &args, | |
24ad148a | 2831 | .rpc_resp = &res, |
1da177e4 LT |
2832 | }; |
2833 | ||
0e574af1 | 2834 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2835 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2836 | } |
2837 | ||
2838 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2839 | { | |
2840 | struct nfs4_exception exception = { }; | |
2841 | int err; | |
2842 | do { | |
2843 | err = nfs4_handle_exception(server, | |
2844 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2845 | &exception); | |
2846 | } while (exception.retry); | |
2847 | return err; | |
2848 | } | |
2849 | ||
2850 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2851 | struct nfs_fsinfo *fsinfo) | |
2852 | { | |
2853 | struct nfs4_fsinfo_arg args = { | |
2854 | .fh = fhandle, | |
2855 | .bitmask = server->attr_bitmask, | |
2856 | }; | |
3dda5e43 BH |
2857 | struct nfs4_fsinfo_res res = { |
2858 | .fsinfo = fsinfo, | |
2859 | }; | |
1da177e4 LT |
2860 | struct rpc_message msg = { |
2861 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2862 | .rpc_argp = &args, | |
3dda5e43 | 2863 | .rpc_resp = &res, |
1da177e4 LT |
2864 | }; |
2865 | ||
cccef3b9 | 2866 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2867 | } |
2868 | ||
2869 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2870 | { | |
2871 | struct nfs4_exception exception = { }; | |
2872 | int err; | |
2873 | ||
2874 | do { | |
2875 | err = nfs4_handle_exception(server, | |
2876 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2877 | &exception); | |
2878 | } while (exception.retry); | |
2879 | return err; | |
2880 | } | |
2881 | ||
2882 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2883 | { | |
0e574af1 | 2884 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2885 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2886 | } | |
2887 | ||
2888 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2889 | struct nfs_pathconf *pathconf) | |
2890 | { | |
2891 | struct nfs4_pathconf_arg args = { | |
2892 | .fh = fhandle, | |
2893 | .bitmask = server->attr_bitmask, | |
2894 | }; | |
d45b2989 BH |
2895 | struct nfs4_pathconf_res res = { |
2896 | .pathconf = pathconf, | |
2897 | }; | |
1da177e4 LT |
2898 | struct rpc_message msg = { |
2899 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2900 | .rpc_argp = &args, | |
d45b2989 | 2901 | .rpc_resp = &res, |
1da177e4 LT |
2902 | }; |
2903 | ||
2904 | /* None of the pathconf attributes are mandatory to implement */ | |
2905 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2906 | memset(pathconf, 0, sizeof(*pathconf)); | |
2907 | return 0; | |
2908 | } | |
2909 | ||
0e574af1 | 2910 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2911 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2912 | } |
2913 | ||
2914 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2915 | struct nfs_pathconf *pathconf) | |
2916 | { | |
2917 | struct nfs4_exception exception = { }; | |
2918 | int err; | |
2919 | ||
2920 | do { | |
2921 | err = nfs4_handle_exception(server, | |
2922 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2923 | &exception); | |
2924 | } while (exception.retry); | |
2925 | return err; | |
2926 | } | |
2927 | ||
ec06c096 | 2928 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2929 | { |
ec06c096 | 2930 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2931 | |
f11c88af AA |
2932 | dprintk("--> %s\n", __func__); |
2933 | ||
2934 | /* nfs4_sequence_free_slot called in the read rpc_call_done */ | |
2935 | nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); | |
2936 | ||
9e33bed5 | 2937 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
eedc020e | 2938 | nfs4_restart_rpc(task, server->nfs_client); |
ec06c096 | 2939 | return -EAGAIN; |
1da177e4 | 2940 | } |
8850df99 TM |
2941 | |
2942 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2943 | if (task->tk_status > 0) |
ec06c096 TM |
2944 | renew_lease(server, data->timestamp); |
2945 | return 0; | |
1da177e4 LT |
2946 | } |
2947 | ||
bdc7f021 | 2948 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2949 | { |
1da177e4 | 2950 | data->timestamp = jiffies; |
bdc7f021 | 2951 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2952 | } |
2953 | ||
788e7a89 | 2954 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2955 | { |
1da177e4 LT |
2956 | struct inode *inode = data->inode; |
2957 | ||
def6ed7e AA |
2958 | /* slot is freed in nfs_writeback_done */ |
2959 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, | |
2960 | task->tk_status); | |
2961 | ||
9e33bed5 | 2962 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
eedc020e | 2963 | nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 2964 | return -EAGAIN; |
1da177e4 | 2965 | } |
4f9838c7 | 2966 | if (task->tk_status >= 0) { |
1da177e4 | 2967 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2968 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2969 | } |
788e7a89 | 2970 | return 0; |
1da177e4 LT |
2971 | } |
2972 | ||
bdc7f021 | 2973 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2974 | { |
bdc7f021 TM |
2975 | struct nfs_server *server = NFS_SERVER(data->inode); |
2976 | ||
a65318bf | 2977 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2978 | data->res.server = server; |
1da177e4 LT |
2979 | data->timestamp = jiffies; |
2980 | ||
bdc7f021 | 2981 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2982 | } |
2983 | ||
788e7a89 | 2984 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2985 | { |
1da177e4 LT |
2986 | struct inode *inode = data->inode; |
2987 | ||
21d9a851 AA |
2988 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
2989 | task->tk_status); | |
9e33bed5 | 2990 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
eedc020e | 2991 | nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 2992 | return -EAGAIN; |
1da177e4 | 2993 | } |
21d9a851 AA |
2994 | nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client, |
2995 | &data->res.seq_res); | |
9e08a3c5 | 2996 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2997 | return 0; |
1da177e4 LT |
2998 | } |
2999 | ||
bdc7f021 | 3000 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3001 | { |
788e7a89 | 3002 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3003 | |
a65318bf | 3004 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3005 | data->res.server = server; |
bdc7f021 | 3006 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
3007 | } |
3008 | ||
3009 | /* | |
3010 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3011 | * standalone procedure for queueing an asynchronous RENEW. | |
3012 | */ | |
963d8fe5 | 3013 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 3014 | { |
adfa6f98 | 3015 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 3016 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
3017 | |
3018 | if (task->tk_status < 0) { | |
95baa25c TM |
3019 | /* Unless we're shutting down, schedule state recovery! */ |
3020 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
3021 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
3022 | return; |
3023 | } | |
3024 | spin_lock(&clp->cl_lock); | |
3025 | if (time_before(clp->cl_last_renewal,timestamp)) | |
3026 | clp->cl_last_renewal = timestamp; | |
3027 | spin_unlock(&clp->cl_lock); | |
29fba38b BH |
3028 | dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__, |
3029 | task->tk_msg.rpc_cred); | |
3030 | put_rpccred(task->tk_msg.rpc_cred); | |
1da177e4 LT |
3031 | } |
3032 | ||
963d8fe5 TM |
3033 | static const struct rpc_call_ops nfs4_renew_ops = { |
3034 | .rpc_call_done = nfs4_renew_done, | |
3035 | }; | |
3036 | ||
adfa6f98 | 3037 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3038 | { |
3039 | struct rpc_message msg = { | |
3040 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3041 | .rpc_argp = clp, | |
b4454fe1 | 3042 | .rpc_cred = cred, |
1da177e4 LT |
3043 | }; |
3044 | ||
3045 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 3046 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
3047 | } |
3048 | ||
adfa6f98 | 3049 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3050 | { |
3051 | struct rpc_message msg = { | |
3052 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3053 | .rpc_argp = clp, | |
b4454fe1 | 3054 | .rpc_cred = cred, |
1da177e4 LT |
3055 | }; |
3056 | unsigned long now = jiffies; | |
3057 | int status; | |
3058 | ||
3059 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3060 | if (status < 0) | |
3061 | return status; | |
3062 | spin_lock(&clp->cl_lock); | |
3063 | if (time_before(clp->cl_last_renewal,now)) | |
3064 | clp->cl_last_renewal = now; | |
3065 | spin_unlock(&clp->cl_lock); | |
3066 | return 0; | |
3067 | } | |
3068 | ||
aa1870af BF |
3069 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3070 | { | |
3071 | return (server->caps & NFS_CAP_ACLS) | |
3072 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3073 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3074 | } | |
3075 | ||
3076 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3077 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3078 | * the stack. | |
3079 | */ | |
3080 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3081 | ||
3082 | static void buf_to_pages(const void *buf, size_t buflen, | |
3083 | struct page **pages, unsigned int *pgbase) | |
3084 | { | |
3085 | const void *p = buf; | |
3086 | ||
3087 | *pgbase = offset_in_page(buf); | |
3088 | p -= *pgbase; | |
3089 | while (p < buf + buflen) { | |
3090 | *(pages++) = virt_to_page(p); | |
3091 | p += PAGE_CACHE_SIZE; | |
3092 | } | |
3093 | } | |
3094 | ||
e50a1c2e BF |
3095 | struct nfs4_cached_acl { |
3096 | int cached; | |
3097 | size_t len; | |
3e9d4154 | 3098 | char data[0]; |
e50a1c2e BF |
3099 | }; |
3100 | ||
3101 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3102 | { | |
3103 | struct nfs_inode *nfsi = NFS_I(inode); | |
3104 | ||
3105 | spin_lock(&inode->i_lock); | |
3106 | kfree(nfsi->nfs4_acl); | |
3107 | nfsi->nfs4_acl = acl; | |
3108 | spin_unlock(&inode->i_lock); | |
3109 | } | |
3110 | ||
3111 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3112 | { | |
3113 | nfs4_set_cached_acl(inode, NULL); | |
3114 | } | |
3115 | ||
3116 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3117 | { | |
3118 | struct nfs_inode *nfsi = NFS_I(inode); | |
3119 | struct nfs4_cached_acl *acl; | |
3120 | int ret = -ENOENT; | |
3121 | ||
3122 | spin_lock(&inode->i_lock); | |
3123 | acl = nfsi->nfs4_acl; | |
3124 | if (acl == NULL) | |
3125 | goto out; | |
3126 | if (buf == NULL) /* user is just asking for length */ | |
3127 | goto out_len; | |
3128 | if (acl->cached == 0) | |
3129 | goto out; | |
3130 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3131 | if (acl->len > buflen) | |
3132 | goto out; | |
3133 | memcpy(buf, acl->data, acl->len); | |
3134 | out_len: | |
3135 | ret = acl->len; | |
3136 | out: | |
3137 | spin_unlock(&inode->i_lock); | |
3138 | return ret; | |
3139 | } | |
3140 | ||
3141 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3142 | { | |
3143 | struct nfs4_cached_acl *acl; | |
3144 | ||
3145 | if (buf && acl_len <= PAGE_SIZE) { | |
3146 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3147 | if (acl == NULL) | |
3148 | goto out; | |
3149 | acl->cached = 1; | |
3150 | memcpy(acl->data, buf, acl_len); | |
3151 | } else { | |
3152 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3153 | if (acl == NULL) | |
3154 | goto out; | |
3155 | acl->cached = 0; | |
3156 | } | |
3157 | acl->len = acl_len; | |
3158 | out: | |
3159 | nfs4_set_cached_acl(inode, acl); | |
3160 | } | |
3161 | ||
16b4289c | 3162 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3163 | { |
aa1870af BF |
3164 | struct page *pages[NFS4ACL_MAXPAGES]; |
3165 | struct nfs_getaclargs args = { | |
3166 | .fh = NFS_FH(inode), | |
3167 | .acl_pages = pages, | |
3168 | .acl_len = buflen, | |
3169 | }; | |
663c79b3 BH |
3170 | struct nfs_getaclres res = { |
3171 | .acl_len = buflen, | |
3172 | }; | |
e50a1c2e | 3173 | void *resp_buf; |
aa1870af BF |
3174 | struct rpc_message msg = { |
3175 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3176 | .rpc_argp = &args, | |
663c79b3 | 3177 | .rpc_resp = &res, |
aa1870af | 3178 | }; |
e50a1c2e | 3179 | struct page *localpage = NULL; |
aa1870af BF |
3180 | int ret; |
3181 | ||
e50a1c2e BF |
3182 | if (buflen < PAGE_SIZE) { |
3183 | /* As long as we're doing a round trip to the server anyway, | |
3184 | * let's be prepared for a page of acl data. */ | |
3185 | localpage = alloc_page(GFP_KERNEL); | |
3186 | resp_buf = page_address(localpage); | |
3187 | if (localpage == NULL) | |
3188 | return -ENOMEM; | |
3189 | args.acl_pages[0] = localpage; | |
3190 | args.acl_pgbase = 0; | |
663c79b3 | 3191 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3192 | } else { |
3193 | resp_buf = buf; | |
3194 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3195 | } | |
cccef3b9 | 3196 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3197 | if (ret) |
3198 | goto out_free; | |
663c79b3 BH |
3199 | if (res.acl_len > args.acl_len) |
3200 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3201 | else |
663c79b3 | 3202 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3203 | if (buf) { |
3204 | ret = -ERANGE; | |
663c79b3 | 3205 | if (res.acl_len > buflen) |
e50a1c2e BF |
3206 | goto out_free; |
3207 | if (localpage) | |
663c79b3 | 3208 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3209 | } |
663c79b3 | 3210 | ret = res.acl_len; |
e50a1c2e BF |
3211 | out_free: |
3212 | if (localpage) | |
3213 | __free_page(localpage); | |
aa1870af BF |
3214 | return ret; |
3215 | } | |
3216 | ||
16b4289c TM |
3217 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3218 | { | |
3219 | struct nfs4_exception exception = { }; | |
3220 | ssize_t ret; | |
3221 | do { | |
3222 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3223 | if (ret >= 0) | |
3224 | break; | |
3225 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3226 | } while (exception.retry); | |
3227 | return ret; | |
3228 | } | |
3229 | ||
e50a1c2e BF |
3230 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3231 | { | |
3232 | struct nfs_server *server = NFS_SERVER(inode); | |
3233 | int ret; | |
3234 | ||
3235 | if (!nfs4_server_supports_acls(server)) | |
3236 | return -EOPNOTSUPP; | |
3237 | ret = nfs_revalidate_inode(server, inode); | |
3238 | if (ret < 0) | |
3239 | return ret; | |
f41f7418 TM |
3240 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
3241 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
3242 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
3243 | if (ret != -ENOENT) | |
3244 | return ret; | |
3245 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3246 | } | |
3247 | ||
16b4289c | 3248 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3249 | { |
3250 | struct nfs_server *server = NFS_SERVER(inode); | |
3251 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3252 | struct nfs_setaclargs arg = { | |
3253 | .fh = NFS_FH(inode), | |
3254 | .acl_pages = pages, | |
3255 | .acl_len = buflen, | |
3256 | }; | |
73c403a9 | 3257 | struct nfs_setaclres res; |
4b580ee3 BF |
3258 | struct rpc_message msg = { |
3259 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3260 | .rpc_argp = &arg, | |
73c403a9 | 3261 | .rpc_resp = &res, |
4b580ee3 BF |
3262 | }; |
3263 | int ret; | |
3264 | ||
3265 | if (!nfs4_server_supports_acls(server)) | |
3266 | return -EOPNOTSUPP; | |
642ac549 | 3267 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3268 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3269 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3270 | nfs_access_zap_cache(inode); |
3271 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3272 | return ret; |
3273 | } | |
3274 | ||
16b4289c TM |
3275 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3276 | { | |
3277 | struct nfs4_exception exception = { }; | |
3278 | int err; | |
3279 | do { | |
3280 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3281 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3282 | &exception); | |
3283 | } while (exception.retry); | |
3284 | return err; | |
3285 | } | |
3286 | ||
1da177e4 | 3287 | static int |
8328d59f | 3288 | _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state) |
1da177e4 | 3289 | { |
1da177e4 LT |
3290 | if (!clp || task->tk_status >= 0) |
3291 | return 0; | |
3292 | switch(task->tk_status) { | |
9e33bed5 TM |
3293 | case -NFS4ERR_ADMIN_REVOKED: |
3294 | case -NFS4ERR_BAD_STATEID: | |
3295 | case -NFS4ERR_OPENMODE: | |
3296 | if (state == NULL) | |
3297 | break; | |
3298 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
3299 | case -NFS4ERR_STALE_CLIENTID: |
3300 | case -NFS4ERR_STALE_STATEID: | |
3301 | case -NFS4ERR_EXPIRED: | |
5d00837b | 3302 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 3303 | nfs4_schedule_state_recovery(clp); |
e005e804 | 3304 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 3305 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
3306 | task->tk_status = 0; |
3307 | return -EAGAIN; | |
4745e315 AA |
3308 | #if defined(CONFIG_NFS_V4_1) |
3309 | case -NFS4ERR_BADSESSION: | |
3310 | case -NFS4ERR_BADSLOT: | |
3311 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3312 | case -NFS4ERR_DEADSESSION: | |
3313 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3314 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3315 | case -NFS4ERR_SEQ_MISORDERED: | |
3316 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3317 | task->tk_status); | |
3318 | set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); | |
3319 | task->tk_status = 0; | |
3320 | return -EAGAIN; | |
3321 | #endif /* CONFIG_NFS_V4_1 */ | |
1da177e4 | 3322 | case -NFS4ERR_DELAY: |
8328d59f AA |
3323 | if (server) |
3324 | nfs_inc_server_stats(server, NFSIOS_DELAY); | |
006ea73e | 3325 | case -NFS4ERR_GRACE: |
1da177e4 LT |
3326 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3327 | task->tk_status = 0; | |
3328 | return -EAGAIN; | |
3329 | case -NFS4ERR_OLD_STATEID: | |
3330 | task->tk_status = 0; | |
3331 | return -EAGAIN; | |
3332 | } | |
3333 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3334 | return 0; | |
3335 | } | |
3336 | ||
8328d59f AA |
3337 | static int |
3338 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) | |
3339 | { | |
3340 | return _nfs4_async_handle_error(task, server, server->nfs_client, state); | |
3341 | } | |
3342 | ||
adfa6f98 | 3343 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
3344 | { |
3345 | nfs4_verifier sc_verifier; | |
3346 | struct nfs4_setclientid setclientid = { | |
3347 | .sc_verifier = &sc_verifier, | |
3348 | .sc_prog = program, | |
3349 | }; | |
3350 | struct rpc_message msg = { | |
3351 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3352 | .rpc_argp = &setclientid, | |
3353 | .rpc_resp = clp, | |
286d7d6a | 3354 | .rpc_cred = cred, |
1da177e4 | 3355 | }; |
bc4785cd | 3356 | __be32 *p; |
1da177e4 LT |
3357 | int loop = 0; |
3358 | int status; | |
3359 | ||
bc4785cd | 3360 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3361 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3362 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3363 | ||
3364 | for(;;) { | |
3365 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3366 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3367 | clp->cl_ipaddr, |
3368 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3369 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3370 | rpc_peeraddr2str(clp->cl_rpcclient, |
3371 | RPC_DISPLAY_PROTO), | |
78ea323b | 3372 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3373 | clp->cl_id_uniquifier); |
3374 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3375 | sizeof(setclientid.sc_netid), |
3376 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3377 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3378 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3379 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3380 | clp->cl_ipaddr, port >> 8, port & 255); |
3381 | ||
3382 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3383 | if (status != -NFS4ERR_CLID_INUSE) | |
3384 | break; | |
3385 | if (signalled()) | |
3386 | break; | |
3387 | if (loop++ & 1) | |
3388 | ssleep(clp->cl_lease_time + 1); | |
3389 | else | |
3390 | if (++clp->cl_id_uniquifier == 0) | |
3391 | break; | |
3392 | } | |
3393 | return status; | |
3394 | } | |
3395 | ||
adfa6f98 | 3396 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3397 | { |
3398 | struct nfs_fsinfo fsinfo; | |
3399 | struct rpc_message msg = { | |
3400 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3401 | .rpc_argp = clp, | |
3402 | .rpc_resp = &fsinfo, | |
286d7d6a | 3403 | .rpc_cred = cred, |
1da177e4 LT |
3404 | }; |
3405 | unsigned long now; | |
3406 | int status; | |
3407 | ||
3408 | now = jiffies; | |
3409 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3410 | if (status == 0) { | |
3411 | spin_lock(&clp->cl_lock); | |
3412 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3413 | clp->cl_last_renewal = now; | |
3414 | spin_unlock(&clp->cl_lock); | |
3415 | } | |
3416 | return status; | |
3417 | } | |
3418 | ||
adfa6f98 | 3419 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3420 | { |
77e03677 | 3421 | long timeout = 0; |
51581f3b TM |
3422 | int err; |
3423 | do { | |
3424 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3425 | switch (err) { | |
3426 | case 0: | |
3427 | return err; | |
3428 | case -NFS4ERR_RESOURCE: | |
3429 | /* The IBM lawyers misread another document! */ | |
3430 | case -NFS4ERR_DELAY: | |
3431 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3432 | } | |
3433 | } while (err == 0); | |
3434 | return err; | |
3435 | } | |
3436 | ||
fe650407 TM |
3437 | struct nfs4_delegreturndata { |
3438 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3439 | struct nfs4_delegreturnres res; |
fe650407 TM |
3440 | struct nfs_fh fh; |
3441 | nfs4_stateid stateid; | |
26e976a8 | 3442 | unsigned long timestamp; |
fa178f29 | 3443 | struct nfs_fattr fattr; |
fe650407 TM |
3444 | int rpc_status; |
3445 | }; | |
3446 | ||
fe650407 TM |
3447 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3448 | { | |
3449 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 AA |
3450 | |
3451 | nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res, | |
3452 | task->tk_status); | |
3453 | ||
fe650407 | 3454 | data->rpc_status = task->tk_status; |
26e976a8 | 3455 | if (data->rpc_status == 0) |
fa178f29 | 3456 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3457 | } |
3458 | ||
3459 | static void nfs4_delegreturn_release(void *calldata) | |
3460 | { | |
fe650407 TM |
3461 | kfree(calldata); |
3462 | } | |
3463 | ||
938e1010 AA |
3464 | #if defined(CONFIG_NFS_V4_1) |
3465 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3466 | { | |
3467 | struct nfs4_delegreturndata *d_data; | |
3468 | ||
3469 | d_data = (struct nfs4_delegreturndata *)data; | |
3470 | ||
3471 | if (nfs4_setup_sequence(d_data->res.server->nfs_client, | |
3472 | &d_data->args.seq_args, | |
3473 | &d_data->res.seq_res, 1, task)) | |
3474 | return; | |
3475 | rpc_call_start(task); | |
3476 | } | |
3477 | #endif /* CONFIG_NFS_V4_1 */ | |
3478 | ||
c8d149f3 | 3479 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3480 | #if defined(CONFIG_NFS_V4_1) |
3481 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3482 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3483 | .rpc_call_done = nfs4_delegreturn_done, |
3484 | .rpc_release = nfs4_delegreturn_release, | |
3485 | }; | |
3486 | ||
e6f81075 | 3487 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3488 | { |
3489 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3490 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3491 | struct rpc_task *task; |
5138fde0 TM |
3492 | struct rpc_message msg = { |
3493 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3494 | .rpc_cred = cred, | |
3495 | }; | |
c970aa85 TM |
3496 | struct rpc_task_setup task_setup_data = { |
3497 | .rpc_client = server->client, | |
5138fde0 | 3498 | .rpc_message = &msg, |
c970aa85 TM |
3499 | .callback_ops = &nfs4_delegreturn_ops, |
3500 | .flags = RPC_TASK_ASYNC, | |
3501 | }; | |
e6f81075 | 3502 | int status = 0; |
fe650407 | 3503 | |
938e1010 | 3504 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
fe650407 TM |
3505 | if (data == NULL) |
3506 | return -ENOMEM; | |
3507 | data->args.fhandle = &data->fh; | |
3508 | data->args.stateid = &data->stateid; | |
fa178f29 | 3509 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3510 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3511 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3512 | data->res.fattr = &data->fattr; |
3513 | data->res.server = server; | |
5f7dbd5c | 3514 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3515 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3516 | data->timestamp = jiffies; |
fe650407 TM |
3517 | data->rpc_status = 0; |
3518 | ||
c970aa85 | 3519 | task_setup_data.callback_data = data; |
5138fde0 TM |
3520 | msg.rpc_argp = &data->args, |
3521 | msg.rpc_resp = &data->res, | |
c970aa85 | 3522 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3523 | if (IS_ERR(task)) |
fe650407 | 3524 | return PTR_ERR(task); |
e6f81075 TM |
3525 | if (!issync) |
3526 | goto out; | |
fe650407 | 3527 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3528 | if (status != 0) |
3529 | goto out; | |
3530 | status = data->rpc_status; | |
3531 | if (status != 0) | |
3532 | goto out; | |
3533 | nfs_refresh_inode(inode, &data->fattr); | |
3534 | out: | |
e6b3c4db | 3535 | rpc_put_task(task); |
fe650407 | 3536 | return status; |
1da177e4 LT |
3537 | } |
3538 | ||
e6f81075 | 3539 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3540 | { |
3541 | struct nfs_server *server = NFS_SERVER(inode); | |
3542 | struct nfs4_exception exception = { }; | |
3543 | int err; | |
3544 | do { | |
e6f81075 | 3545 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3546 | switch (err) { |
3547 | case -NFS4ERR_STALE_STATEID: | |
3548 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3549 | case 0: |
3550 | return 0; | |
3551 | } | |
3552 | err = nfs4_handle_exception(server, err, &exception); | |
3553 | } while (exception.retry); | |
3554 | return err; | |
3555 | } | |
3556 | ||
3557 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3558 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3559 | ||
3560 | /* | |
3561 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3562 | */ | |
3563 | static unsigned long | |
3564 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3565 | { | |
150030b7 | 3566 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3567 | timeout <<= 1; |
3568 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3569 | return NFS4_LOCK_MAXTIMEOUT; | |
3570 | return timeout; | |
3571 | } | |
3572 | ||
1da177e4 LT |
3573 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3574 | { | |
3575 | struct inode *inode = state->inode; | |
3576 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3577 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3578 | struct nfs_lockt_args arg = { |
1da177e4 | 3579 | .fh = NFS_FH(inode), |
911d1aaf | 3580 | .fl = request, |
1da177e4 | 3581 | }; |
911d1aaf TM |
3582 | struct nfs_lockt_res res = { |
3583 | .denied = request, | |
1da177e4 LT |
3584 | }; |
3585 | struct rpc_message msg = { | |
3586 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3587 | .rpc_argp = &arg, | |
3588 | .rpc_resp = &res, | |
3589 | .rpc_cred = state->owner->so_cred, | |
3590 | }; | |
1da177e4 LT |
3591 | struct nfs4_lock_state *lsp; |
3592 | int status; | |
3593 | ||
911d1aaf | 3594 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3595 | status = nfs4_set_lock_state(state, request); |
3596 | if (status != 0) | |
3597 | goto out; | |
3598 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3599 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3600 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3601 | switch (status) { |
3602 | case 0: | |
3603 | request->fl_type = F_UNLCK; | |
3604 | break; | |
3605 | case -NFS4ERR_DENIED: | |
3606 | status = 0; | |
1da177e4 | 3607 | } |
70cc6487 | 3608 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3609 | out: |
1da177e4 LT |
3610 | return status; |
3611 | } | |
3612 | ||
3613 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3614 | { | |
3615 | struct nfs4_exception exception = { }; | |
3616 | int err; | |
3617 | ||
3618 | do { | |
3619 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3620 | _nfs4_proc_getlk(state, cmd, request), | |
3621 | &exception); | |
3622 | } while (exception.retry); | |
3623 | return err; | |
3624 | } | |
3625 | ||
3626 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3627 | { | |
3628 | int res = 0; | |
3629 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3630 | case FL_POSIX: | |
3631 | res = posix_lock_file_wait(file, fl); | |
3632 | break; | |
3633 | case FL_FLOCK: | |
3634 | res = flock_lock_file_wait(file, fl); | |
3635 | break; | |
3636 | default: | |
3637 | BUG(); | |
3638 | } | |
1da177e4 LT |
3639 | return res; |
3640 | } | |
3641 | ||
faf5f49c | 3642 | struct nfs4_unlockdata { |
911d1aaf TM |
3643 | struct nfs_locku_args arg; |
3644 | struct nfs_locku_res res; | |
faf5f49c TM |
3645 | struct nfs4_lock_state *lsp; |
3646 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3647 | struct file_lock fl; |
3648 | const struct nfs_server *server; | |
26e976a8 | 3649 | unsigned long timestamp; |
faf5f49c TM |
3650 | }; |
3651 | ||
911d1aaf TM |
3652 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3653 | struct nfs_open_context *ctx, | |
3654 | struct nfs4_lock_state *lsp, | |
3655 | struct nfs_seqid *seqid) | |
3656 | { | |
3657 | struct nfs4_unlockdata *p; | |
3658 | struct inode *inode = lsp->ls_state->inode; | |
3659 | ||
a893693c | 3660 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
911d1aaf TM |
3661 | if (p == NULL) |
3662 | return NULL; | |
3663 | p->arg.fh = NFS_FH(inode); | |
3664 | p->arg.fl = &p->fl; | |
3665 | p->arg.seqid = seqid; | |
c1d51931 | 3666 | p->res.seqid = seqid; |
5f7dbd5c | 3667 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3668 | p->arg.stateid = &lsp->ls_stateid; |
3669 | p->lsp = lsp; | |
3670 | atomic_inc(&lsp->ls_count); | |
3671 | /* Ensure we don't close file until we're done freeing locks! */ | |
3672 | p->ctx = get_nfs_open_context(ctx); | |
3673 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3674 | p->server = NFS_SERVER(inode); | |
3675 | return p; | |
3676 | } | |
3677 | ||
06f814a3 | 3678 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3679 | { |
963d8fe5 | 3680 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3681 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3682 | nfs4_put_lock_state(calldata->lsp); |
3683 | put_nfs_open_context(calldata->ctx); | |
3684 | kfree(calldata); | |
faf5f49c TM |
3685 | } |
3686 | ||
963d8fe5 | 3687 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3688 | { |
963d8fe5 | 3689 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3690 | |
a893693c AA |
3691 | nfs4_sequence_done(calldata->server, &calldata->res.seq_res, |
3692 | task->tk_status); | |
06f814a3 TM |
3693 | if (RPC_ASSASSINATED(task)) |
3694 | return; | |
faf5f49c TM |
3695 | switch (task->tk_status) { |
3696 | case 0: | |
3697 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3698 | calldata->res.stateid.data, |
faf5f49c | 3699 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3700 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3701 | break; |
9e33bed5 TM |
3702 | case -NFS4ERR_BAD_STATEID: |
3703 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3704 | case -NFS4ERR_STALE_STATEID: |
3705 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3706 | break; |
3707 | default: | |
9e33bed5 | 3708 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
eedc020e AA |
3709 | nfs4_restart_rpc(task, |
3710 | calldata->server->nfs_client); | |
faf5f49c | 3711 | } |
a893693c AA |
3712 | nfs4_sequence_free_slot(calldata->server->nfs_client, |
3713 | &calldata->res.seq_res); | |
faf5f49c TM |
3714 | } |
3715 | ||
4ce70ada | 3716 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3717 | { |
4ce70ada | 3718 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3719 | |
911d1aaf | 3720 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3721 | return; |
3722 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3723 | /* Note: exit _without_ running nfs4_locku_done */ |
3724 | task->tk_action = NULL; | |
faf5f49c TM |
3725 | return; |
3726 | } | |
26e976a8 | 3727 | calldata->timestamp = jiffies; |
a893693c AA |
3728 | if (nfs4_setup_sequence(calldata->server->nfs_client, |
3729 | &calldata->arg.seq_args, | |
3730 | &calldata->res.seq_res, 1, task)) | |
3731 | return; | |
5138fde0 | 3732 | rpc_call_start(task); |
faf5f49c TM |
3733 | } |
3734 | ||
963d8fe5 | 3735 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3736 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3737 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3738 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3739 | }; |
3740 | ||
a5d16a4d TM |
3741 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3742 | struct nfs_open_context *ctx, | |
3743 | struct nfs4_lock_state *lsp, | |
3744 | struct nfs_seqid *seqid) | |
3745 | { | |
3746 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3747 | struct rpc_message msg = { |
3748 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3749 | .rpc_cred = ctx->cred, | |
3750 | }; | |
c970aa85 TM |
3751 | struct rpc_task_setup task_setup_data = { |
3752 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3753 | .rpc_message = &msg, |
c970aa85 | 3754 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3755 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3756 | .flags = RPC_TASK_ASYNC, |
3757 | }; | |
a5d16a4d | 3758 | |
137d6aca FF |
3759 | /* Ensure this is an unlock - when canceling a lock, the |
3760 | * canceled lock is passed in, and it won't be an unlock. | |
3761 | */ | |
3762 | fl->fl_type = F_UNLCK; | |
3763 | ||
a5d16a4d TM |
3764 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3765 | if (data == NULL) { | |
3766 | nfs_free_seqid(seqid); | |
3767 | return ERR_PTR(-ENOMEM); | |
3768 | } | |
3769 | ||
5138fde0 TM |
3770 | msg.rpc_argp = &data->arg, |
3771 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3772 | task_setup_data.callback_data = data; |
3773 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3774 | } |
3775 | ||
faf5f49c TM |
3776 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3777 | { | |
19e03c57 | 3778 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3779 | struct nfs_seqid *seqid; |
1da177e4 | 3780 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3781 | struct rpc_task *task; |
3782 | int status = 0; | |
536ff0f8 | 3783 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3784 | |
8d0a8a9d | 3785 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3786 | /* Unlock _before_ we do the RPC call */ |
3787 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3788 | down_read(&nfsi->rwsem); |
3789 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3790 | up_read(&nfsi->rwsem); | |
9b073574 | 3791 | goto out; |
19e03c57 TM |
3792 | } |
3793 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3794 | if (status != 0) |
9b073574 TM |
3795 | goto out; |
3796 | /* Is this a delegated lock? */ | |
3797 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3798 | goto out; | |
8d0a8a9d | 3799 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3800 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3801 | status = -ENOMEM; |
911d1aaf | 3802 | if (seqid == NULL) |
9b073574 | 3803 | goto out; |
cd3758e3 | 3804 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3805 | status = PTR_ERR(task); |
3806 | if (IS_ERR(task)) | |
9b073574 | 3807 | goto out; |
a5d16a4d | 3808 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3809 | rpc_put_task(task); |
9b073574 | 3810 | out: |
536ff0f8 | 3811 | request->fl_flags = fl_flags; |
1da177e4 LT |
3812 | return status; |
3813 | } | |
3814 | ||
a5d16a4d TM |
3815 | struct nfs4_lockdata { |
3816 | struct nfs_lock_args arg; | |
3817 | struct nfs_lock_res res; | |
3818 | struct nfs4_lock_state *lsp; | |
3819 | struct nfs_open_context *ctx; | |
3820 | struct file_lock fl; | |
26e976a8 | 3821 | unsigned long timestamp; |
a5d16a4d TM |
3822 | int rpc_status; |
3823 | int cancelled; | |
66179efe | 3824 | struct nfs_server *server; |
a5d16a4d TM |
3825 | }; |
3826 | ||
3827 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3828 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3829 | { |
a5d16a4d TM |
3830 | struct nfs4_lockdata *p; |
3831 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3832 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3833 | |
3834 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3835 | if (p == NULL) | |
3836 | return NULL; | |
3837 | ||
3838 | p->arg.fh = NFS_FH(inode); | |
3839 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3840 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3841 | if (p->arg.open_seqid == NULL) | |
3842 | goto out_free; | |
a5d16a4d TM |
3843 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3844 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3845 | goto out_free_seqid; |
a5d16a4d | 3846 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3847 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3848 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3849 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 3850 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d | 3851 | p->lsp = lsp; |
66179efe | 3852 | p->server = server; |
a5d16a4d TM |
3853 | atomic_inc(&lsp->ls_count); |
3854 | p->ctx = get_nfs_open_context(ctx); | |
3855 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3856 | return p; | |
2f74c0a0 TM |
3857 | out_free_seqid: |
3858 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3859 | out_free: |
3860 | kfree(p); | |
3861 | return NULL; | |
3862 | } | |
3863 | ||
3864 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3865 | { | |
3866 | struct nfs4_lockdata *data = calldata; | |
3867 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3868 | |
3110ff80 | 3869 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3870 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3871 | return; | |
a5d16a4d TM |
3872 | /* Do we need to do an open_to_lock_owner? */ |
3873 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3874 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3875 | return; | |
a5d16a4d TM |
3876 | data->arg.open_stateid = &state->stateid; |
3877 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3878 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3879 | } else |
3880 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3881 | data->timestamp = jiffies; |
66179efe AA |
3882 | if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, |
3883 | &data->res.seq_res, 1, task)) | |
3884 | return; | |
5138fde0 | 3885 | rpc_call_start(task); |
3110ff80 | 3886 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3887 | } |
3888 | ||
3889 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3890 | { | |
3891 | struct nfs4_lockdata *data = calldata; | |
3892 | ||
3110ff80 | 3893 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 3894 | |
66179efe AA |
3895 | nfs4_sequence_done_free_slot(data->server, &data->res.seq_res, |
3896 | task->tk_status); | |
3897 | ||
a5d16a4d TM |
3898 | data->rpc_status = task->tk_status; |
3899 | if (RPC_ASSASSINATED(task)) | |
3900 | goto out; | |
3901 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3902 | if (data->rpc_status == 0) |
3903 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3904 | else | |
3905 | goto out; | |
3906 | } | |
3907 | if (data->rpc_status == 0) { | |
3908 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3909 | sizeof(data->lsp->ls_stateid.data)); | |
3910 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3911 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3912 | } |
a5d16a4d | 3913 | out: |
3110ff80 | 3914 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3915 | } |
3916 | ||
3917 | static void nfs4_lock_release(void *calldata) | |
3918 | { | |
3919 | struct nfs4_lockdata *data = calldata; | |
3920 | ||
3110ff80 | 3921 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3922 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3923 | if (data->cancelled != 0) { |
3924 | struct rpc_task *task; | |
3925 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3926 | data->arg.lock_seqid); | |
3927 | if (!IS_ERR(task)) | |
e6b3c4db | 3928 | rpc_put_task(task); |
3110ff80 | 3929 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3930 | } else |
3931 | nfs_free_seqid(data->arg.lock_seqid); | |
3932 | nfs4_put_lock_state(data->lsp); | |
3933 | put_nfs_open_context(data->ctx); | |
3934 | kfree(data); | |
3110ff80 | 3935 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3936 | } |
3937 | ||
3938 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3939 | .rpc_call_prepare = nfs4_lock_prepare, | |
3940 | .rpc_call_done = nfs4_lock_done, | |
3941 | .rpc_release = nfs4_lock_release, | |
3942 | }; | |
3943 | ||
3944 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3945 | { | |
3946 | struct nfs4_lockdata *data; | |
3947 | struct rpc_task *task; | |
5138fde0 TM |
3948 | struct rpc_message msg = { |
3949 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3950 | .rpc_cred = state->owner->so_cred, | |
3951 | }; | |
c970aa85 TM |
3952 | struct rpc_task_setup task_setup_data = { |
3953 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3954 | .rpc_message = &msg, |
c970aa85 | 3955 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3956 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3957 | .flags = RPC_TASK_ASYNC, |
3958 | }; | |
a5d16a4d TM |
3959 | int ret; |
3960 | ||
3110ff80 | 3961 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3962 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3963 | fl->fl_u.nfs4_fl.owner); |
3964 | if (data == NULL) | |
3965 | return -ENOMEM; | |
3966 | if (IS_SETLKW(cmd)) | |
3967 | data->arg.block = 1; | |
3968 | if (reclaim != 0) | |
3969 | data->arg.reclaim = 1; | |
5138fde0 TM |
3970 | msg.rpc_argp = &data->arg, |
3971 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3972 | task_setup_data.callback_data = data; |
3973 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3974 | if (IS_ERR(task)) |
a5d16a4d | 3975 | return PTR_ERR(task); |
a5d16a4d TM |
3976 | ret = nfs4_wait_for_completion_rpc_task(task); |
3977 | if (ret == 0) { | |
3978 | ret = data->rpc_status; | |
3979 | if (ret == -NFS4ERR_DENIED) | |
3980 | ret = -EAGAIN; | |
3981 | } else | |
3982 | data->cancelled = 1; | |
e6b3c4db | 3983 | rpc_put_task(task); |
3110ff80 | 3984 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3985 | return ret; |
1da177e4 LT |
3986 | } |
3987 | ||
3988 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3989 | { | |
202b50dc TM |
3990 | struct nfs_server *server = NFS_SERVER(state->inode); |
3991 | struct nfs4_exception exception = { }; | |
3992 | int err; | |
3993 | ||
3994 | do { | |
42a2d13e TM |
3995 | /* Cache the lock if possible... */ |
3996 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3997 | return 0; | |
202b50dc TM |
3998 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3999 | if (err != -NFS4ERR_DELAY) | |
4000 | break; | |
4001 | nfs4_handle_exception(server, err, &exception); | |
4002 | } while (exception.retry); | |
4003 | return err; | |
1da177e4 LT |
4004 | } |
4005 | ||
4006 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4007 | { | |
202b50dc TM |
4008 | struct nfs_server *server = NFS_SERVER(state->inode); |
4009 | struct nfs4_exception exception = { }; | |
4010 | int err; | |
4011 | ||
6bfc93ef TM |
4012 | err = nfs4_set_lock_state(state, request); |
4013 | if (err != 0) | |
4014 | return err; | |
202b50dc | 4015 | do { |
42a2d13e TM |
4016 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
4017 | return 0; | |
202b50dc TM |
4018 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
4019 | if (err != -NFS4ERR_DELAY) | |
4020 | break; | |
4021 | nfs4_handle_exception(server, err, &exception); | |
4022 | } while (exception.retry); | |
4023 | return err; | |
1da177e4 LT |
4024 | } |
4025 | ||
4026 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4027 | { | |
19e03c57 | 4028 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 4029 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
4030 | int status; |
4031 | ||
6bfc93ef | 4032 | /* Is this a delegated open? */ |
6bfc93ef TM |
4033 | status = nfs4_set_lock_state(state, request); |
4034 | if (status != 0) | |
4035 | goto out; | |
01c3b861 TM |
4036 | request->fl_flags |= FL_ACCESS; |
4037 | status = do_vfs_lock(request->fl_file, request); | |
4038 | if (status < 0) | |
4039 | goto out; | |
19e03c57 | 4040 | down_read(&nfsi->rwsem); |
01c3b861 | 4041 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 4042 | /* Yes: cache locks! */ |
01c3b861 | 4043 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
4044 | request->fl_flags = fl_flags & ~FL_SLEEP; |
4045 | status = do_vfs_lock(request->fl_file, request); | |
4046 | goto out_unlock; | |
01c3b861 | 4047 | } |
6bfc93ef TM |
4048 | status = _nfs4_do_setlk(state, cmd, request, 0); |
4049 | if (status != 0) | |
01c3b861 | 4050 | goto out_unlock; |
6bfc93ef | 4051 | /* Note: we always want to sleep here! */ |
01c3b861 | 4052 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 4053 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 4054 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 4055 | out_unlock: |
19e03c57 | 4056 | up_read(&nfsi->rwsem); |
01c3b861 TM |
4057 | out: |
4058 | request->fl_flags = fl_flags; | |
1da177e4 LT |
4059 | return status; |
4060 | } | |
4061 | ||
4062 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4063 | { | |
4064 | struct nfs4_exception exception = { }; | |
4065 | int err; | |
4066 | ||
4067 | do { | |
4068 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
4069 | _nfs4_proc_setlk(state, cmd, request), | |
4070 | &exception); | |
4071 | } while (exception.retry); | |
4072 | return err; | |
4073 | } | |
4074 | ||
4075 | static int | |
4076 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4077 | { | |
4078 | struct nfs_open_context *ctx; | |
4079 | struct nfs4_state *state; | |
4080 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4081 | int status; | |
4082 | ||
4083 | /* verify open state */ | |
cd3758e3 | 4084 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4085 | state = ctx->state; |
4086 | ||
4087 | if (request->fl_start < 0 || request->fl_end < 0) | |
4088 | return -EINVAL; | |
4089 | ||
4090 | if (IS_GETLK(cmd)) | |
4091 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4092 | ||
4093 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4094 | return -EINVAL; | |
4095 | ||
4096 | if (request->fl_type == F_UNLCK) | |
4097 | return nfs4_proc_unlck(state, cmd, request); | |
4098 | ||
4099 | do { | |
4100 | status = nfs4_proc_setlk(state, cmd, request); | |
4101 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4102 | break; | |
4103 | timeout = nfs4_set_lock_task_retry(timeout); | |
4104 | status = -ERESTARTSYS; | |
4105 | if (signalled()) | |
4106 | break; | |
4107 | } while(status < 0); | |
1da177e4 LT |
4108 | return status; |
4109 | } | |
4110 | ||
888e694c TM |
4111 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4112 | { | |
4113 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4114 | struct nfs4_exception exception = { }; | |
4115 | int err; | |
4116 | ||
4117 | err = nfs4_set_lock_state(state, fl); | |
4118 | if (err != 0) | |
4119 | goto out; | |
4120 | do { | |
4121 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
4122 | if (err != -NFS4ERR_DELAY) | |
4123 | break; | |
4124 | err = nfs4_handle_exception(server, err, &exception); | |
4125 | } while (exception.retry); | |
4126 | out: | |
4127 | return err; | |
4128 | } | |
6b3b5496 | 4129 | |
aa1870af BF |
4130 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4131 | ||
6b3b5496 BF |
4132 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4133 | size_t buflen, int flags) | |
4134 | { | |
4b580ee3 BF |
4135 | struct inode *inode = dentry->d_inode; |
4136 | ||
4137 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4138 | return -EOPNOTSUPP; | |
4139 | ||
4b580ee3 | 4140 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4141 | } |
4142 | ||
4143 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4144 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4145 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4146 | * attributes in kernel-managed attribute namespaces. */ | |
4147 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4148 | size_t buflen) | |
4149 | { | |
aa1870af BF |
4150 | struct inode *inode = dentry->d_inode; |
4151 | ||
4152 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4153 | return -EOPNOTSUPP; | |
4154 | ||
4155 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4156 | } |
4157 | ||
4158 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4159 | { | |
aa1870af | 4160 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4161 | |
096455a2 BF |
4162 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4163 | return 0; | |
6b3b5496 BF |
4164 | if (buf && buflen < len) |
4165 | return -ERANGE; | |
4166 | if (buf) | |
aa1870af BF |
4167 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4168 | return len; | |
6b3b5496 BF |
4169 | } |
4170 | ||
69aaaae1 TM |
4171 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4172 | { | |
4173 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4174 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4175 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4176 | return; | |
4177 | ||
4178 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4179 | NFS_ATTR_FATTR_NLINK; | |
4180 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4181 | fattr->nlink = 2; | |
4182 | } | |
4183 | ||
56659e99 | 4184 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4185 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4186 | { |
4187 | struct nfs_server *server = NFS_SERVER(dir); | |
4188 | u32 bitmask[2] = { | |
361e624f MN |
4189 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4190 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4191 | }; |
4192 | struct nfs4_fs_locations_arg args = { | |
4193 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4194 | .name = name, |
683b57b4 TM |
4195 | .page = page, |
4196 | .bitmask = bitmask, | |
4197 | }; | |
22958463 BH |
4198 | struct nfs4_fs_locations_res res = { |
4199 | .fs_locations = fs_locations, | |
4200 | }; | |
683b57b4 TM |
4201 | struct rpc_message msg = { |
4202 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4203 | .rpc_argp = &args, | |
22958463 | 4204 | .rpc_resp = &res, |
683b57b4 TM |
4205 | }; |
4206 | int status; | |
4207 | ||
3110ff80 | 4208 | dprintk("%s: start\n", __func__); |
c228fd3a | 4209 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4210 | fs_locations->server = server; |
830b8e33 | 4211 | fs_locations->nlocations = 0; |
cccef3b9 | 4212 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4213 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4214 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4215 | return status; |
4216 | } | |
4217 | ||
557134a3 | 4218 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4219 | /* |
4220 | * nfs4_proc_exchange_id() | |
4221 | * | |
4222 | * Since the clientid has expired, all compounds using sessions | |
4223 | * associated with the stale clientid will be returning | |
4224 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4225 | * be in some phase of session reset. | |
4226 | */ | |
4227 | static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) | |
4228 | { | |
4229 | nfs4_verifier verifier; | |
4230 | struct nfs41_exchange_id_args args = { | |
4231 | .client = clp, | |
4232 | .flags = clp->cl_exchange_flags, | |
4233 | }; | |
4234 | struct nfs41_exchange_id_res res = { | |
4235 | .client = clp, | |
4236 | }; | |
4237 | int status; | |
4238 | struct rpc_message msg = { | |
4239 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4240 | .rpc_argp = &args, | |
4241 | .rpc_resp = &res, | |
4242 | .rpc_cred = cred, | |
4243 | }; | |
4244 | __be32 *p; | |
4245 | ||
4246 | dprintk("--> %s\n", __func__); | |
4247 | BUG_ON(clp == NULL); | |
a7b72103 | 4248 | |
99fe60d0 BH |
4249 | p = (u32 *)verifier.data; |
4250 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4251 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4252 | args.verifier = &verifier; | |
4253 | ||
4254 | while (1) { | |
4255 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4256 | "%s/%s %u", | |
4257 | clp->cl_ipaddr, | |
4258 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4259 | RPC_DISPLAY_ADDR), | |
4260 | clp->cl_id_uniquifier); | |
4261 | ||
4262 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4263 | ||
4264 | if (status != NFS4ERR_CLID_INUSE) | |
4265 | break; | |
4266 | ||
4267 | if (signalled()) | |
4268 | break; | |
4269 | ||
4270 | if (++clp->cl_id_uniquifier == 0) | |
4271 | break; | |
4272 | } | |
4273 | ||
4274 | dprintk("<-- %s status= %d\n", __func__, status); | |
4275 | return status; | |
4276 | } | |
4277 | ||
2050f0cc AA |
4278 | struct nfs4_get_lease_time_data { |
4279 | struct nfs4_get_lease_time_args *args; | |
4280 | struct nfs4_get_lease_time_res *res; | |
4281 | struct nfs_client *clp; | |
4282 | }; | |
4283 | ||
4284 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4285 | void *calldata) | |
4286 | { | |
4287 | int ret; | |
4288 | struct nfs4_get_lease_time_data *data = | |
4289 | (struct nfs4_get_lease_time_data *)calldata; | |
4290 | ||
4291 | dprintk("--> %s\n", __func__); | |
4292 | /* just setup sequence, do not trigger session recovery | |
4293 | since we're invoked within one */ | |
4294 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
4295 | &data->args->la_seq_args, | |
4296 | &data->res->lr_seq_res, 0, task); | |
4297 | ||
4298 | BUG_ON(ret == -EAGAIN); | |
4299 | rpc_call_start(task); | |
4300 | dprintk("<-- %s\n", __func__); | |
4301 | } | |
4302 | ||
4303 | /* | |
4304 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4305 | * from sequence operation or clientid errors. | |
4306 | */ | |
4307 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4308 | { | |
4309 | struct nfs4_get_lease_time_data *data = | |
4310 | (struct nfs4_get_lease_time_data *)calldata; | |
4311 | ||
4312 | dprintk("--> %s\n", __func__); | |
4313 | nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); | |
4314 | switch (task->tk_status) { | |
4315 | case -NFS4ERR_DELAY: | |
4316 | case -NFS4ERR_GRACE: | |
4317 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
4318 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4319 | task->tk_status = 0; | |
eedc020e | 4320 | nfs4_restart_rpc(task, data->clp); |
2050f0cc AA |
4321 | return; |
4322 | } | |
4323 | nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res); | |
4324 | dprintk("<-- %s\n", __func__); | |
4325 | } | |
4326 | ||
4327 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4328 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4329 | .rpc_call_done = nfs4_get_lease_time_done, | |
4330 | }; | |
4331 | ||
4332 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4333 | { | |
4334 | struct rpc_task *task; | |
4335 | struct nfs4_get_lease_time_args args; | |
4336 | struct nfs4_get_lease_time_res res = { | |
4337 | .lr_fsinfo = fsinfo, | |
4338 | }; | |
4339 | struct nfs4_get_lease_time_data data = { | |
4340 | .args = &args, | |
4341 | .res = &res, | |
4342 | .clp = clp, | |
4343 | }; | |
4344 | struct rpc_message msg = { | |
4345 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4346 | .rpc_argp = &args, | |
4347 | .rpc_resp = &res, | |
4348 | }; | |
4349 | struct rpc_task_setup task_setup = { | |
4350 | .rpc_client = clp->cl_rpcclient, | |
4351 | .rpc_message = &msg, | |
4352 | .callback_ops = &nfs4_get_lease_time_ops, | |
4353 | .callback_data = &data | |
4354 | }; | |
4355 | int status; | |
4356 | ||
4357 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4358 | dprintk("--> %s\n", __func__); | |
4359 | task = rpc_run_task(&task_setup); | |
4360 | ||
4361 | if (IS_ERR(task)) | |
4362 | status = PTR_ERR(task); | |
4363 | else { | |
4364 | status = task->tk_status; | |
4365 | rpc_put_task(task); | |
4366 | } | |
4367 | dprintk("<-- %s return %d\n", __func__, status); | |
4368 | ||
4369 | return status; | |
4370 | } | |
4371 | ||
ac72b7b3 AA |
4372 | /* Reset a slot table */ |
4373 | static int nfs4_reset_slot_table(struct nfs4_session *session) | |
4374 | { | |
4375 | struct nfs4_slot_table *tbl = &session->fc_slot_table; | |
4376 | int i, max_slots = session->fc_attrs.max_reqs; | |
4377 | int old_max_slots = session->fc_slot_table.max_slots; | |
4378 | int ret = 0; | |
4379 | ||
4380 | dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, | |
4381 | session->fc_attrs.max_reqs, tbl); | |
4382 | ||
4383 | /* Until we have dynamic slot table adjustment, insist | |
4384 | * upon the same slot table size */ | |
4385 | if (max_slots != old_max_slots) { | |
4386 | dprintk("%s reset slot table does't match old\n", | |
4387 | __func__); | |
4388 | ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */ | |
4389 | goto out; | |
4390 | } | |
4391 | spin_lock(&tbl->slot_tbl_lock); | |
4392 | for (i = 0; i < max_slots; ++i) | |
4393 | tbl->slots[i].seq_nr = 1; | |
4394 | tbl->highest_used_slotid = -1; | |
4395 | spin_unlock(&tbl->slot_tbl_lock); | |
4396 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4397 | tbl, tbl->slots, tbl->max_slots); | |
4398 | out: | |
4399 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4400 | return ret; | |
4401 | } | |
4402 | ||
fc931582 AA |
4403 | /* |
4404 | * Initialize slot table | |
4405 | */ | |
4406 | static int nfs4_init_slot_table(struct nfs4_session *session) | |
4407 | { | |
4408 | struct nfs4_slot_table *tbl = &session->fc_slot_table; | |
4409 | int i, max_slots = session->fc_attrs.max_reqs; | |
4410 | struct nfs4_slot *slot; | |
4411 | int ret = -ENOMEM; | |
4412 | ||
4413 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4414 | ||
4415 | dprintk("--> %s: max_reqs=%u\n", __func__, | |
4416 | session->fc_attrs.max_reqs); | |
4417 | ||
4418 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL); | |
4419 | if (!slot) | |
4420 | goto out; | |
4421 | for (i = 0; i < max_slots; ++i) | |
4422 | slot[i].seq_nr = 1; | |
4423 | ret = 0; | |
4424 | ||
4425 | spin_lock(&tbl->slot_tbl_lock); | |
4426 | if (tbl->slots != NULL) { | |
4427 | spin_unlock(&tbl->slot_tbl_lock); | |
4428 | dprintk("%s: slot table already initialized. tbl=%p slots=%p\n", | |
4429 | __func__, tbl, tbl->slots); | |
4430 | WARN_ON(1); | |
4431 | goto out_free; | |
4432 | } | |
4433 | tbl->max_slots = max_slots; | |
4434 | tbl->slots = slot; | |
4435 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4436 | spin_unlock(&tbl->slot_tbl_lock); | |
4437 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4438 | tbl, tbl->slots, tbl->max_slots); | |
4439 | out: | |
4440 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4441 | return ret; | |
4442 | out_free: | |
4443 | kfree(slot); | |
4444 | goto out; | |
4445 | } | |
4446 | ||
557134a3 AA |
4447 | /* Destroy the slot table */ |
4448 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
4449 | { | |
4450 | if (session->fc_slot_table.slots == NULL) | |
4451 | return; | |
4452 | kfree(session->fc_slot_table.slots); | |
4453 | session->fc_slot_table.slots = NULL; | |
4454 | return; | |
4455 | } | |
4456 | ||
4457 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4458 | { | |
4459 | struct nfs4_session *session; | |
4460 | struct nfs4_slot_table *tbl; | |
4461 | ||
4462 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
4463 | if (!session) | |
4464 | return NULL; | |
76db6d95 AA |
4465 | |
4466 | set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state); | |
4467 | /* | |
4468 | * The create session reply races with the server back | |
4469 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
4470 | * so that the client back channel can find the | |
4471 | * nfs_client struct | |
4472 | */ | |
4473 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
4474 | ||
557134a3 AA |
4475 | tbl = &session->fc_slot_table; |
4476 | spin_lock_init(&tbl->slot_tbl_lock); | |
4477 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
4478 | session->clp = clp; | |
4479 | return session; | |
4480 | } | |
4481 | ||
4482 | void nfs4_destroy_session(struct nfs4_session *session) | |
4483 | { | |
4484 | nfs4_destroy_slot_table(session); | |
4485 | kfree(session); | |
4486 | } | |
4487 | ||
fc931582 AA |
4488 | /* |
4489 | * Initialize the values to be used by the client in CREATE_SESSION | |
4490 | * If nfs4_init_session set the fore channel request and response sizes, | |
4491 | * use them. | |
4492 | * | |
4493 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4494 | * always set csa_cachethis to FALSE because the current implementation | |
4495 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4496 | */ | |
4497 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4498 | { | |
4499 | struct nfs4_session *session = args->client->cl_session; | |
4500 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4501 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4502 | ||
4503 | if (mxrqst_sz == 0) | |
4504 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4505 | if (mxresp_sz == 0) | |
4506 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4507 | /* Fore channel attributes */ | |
4508 | args->fc_attrs.headerpadsz = 0; | |
4509 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4510 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
4511 | args->fc_attrs.max_resp_sz_cached = mxresp_sz; | |
4512 | args->fc_attrs.max_ops = NFS4_MAX_OPS; | |
4513 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4514 | ||
4515 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4516 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4517 | __func__, | |
4518 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
4519 | args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops, | |
4520 | args->fc_attrs.max_reqs); | |
4521 | ||
4522 | /* Back channel attributes */ | |
4523 | args->bc_attrs.headerpadsz = 0; | |
4524 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4525 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4526 | args->bc_attrs.max_resp_sz_cached = 0; | |
4527 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4528 | args->bc_attrs.max_reqs = 1; | |
4529 | ||
4530 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4531 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4532 | __func__, | |
4533 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4534 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4535 | args->bc_attrs.max_reqs); | |
4536 | } | |
4537 | ||
8d35301d AA |
4538 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) |
4539 | { | |
4540 | if (rcvd <= sent) | |
4541 | return 0; | |
4542 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4543 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4544 | return -EINVAL; | |
4545 | } | |
4546 | ||
4547 | #define _verify_fore_channel_attr(_name_) \ | |
4548 | _verify_channel_attr("fore", #_name_, \ | |
4549 | args->fc_attrs._name_, \ | |
4550 | session->fc_attrs._name_) | |
4551 | ||
4552 | #define _verify_back_channel_attr(_name_) \ | |
4553 | _verify_channel_attr("back", #_name_, \ | |
4554 | args->bc_attrs._name_, \ | |
4555 | session->bc_attrs._name_) | |
4556 | ||
4557 | /* | |
4558 | * The server is not allowed to increase the fore channel header pad size, | |
4559 | * maximum response size, or maximum number of operations. | |
4560 | * | |
4561 | * The back channel attributes are only negotiatied down: We send what the | |
4562 | * (back channel) server insists upon. | |
4563 | */ | |
4564 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4565 | struct nfs4_session *session) | |
4566 | { | |
4567 | int ret = 0; | |
4568 | ||
4569 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4570 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4571 | ret |= _verify_fore_channel_attr(max_ops); | |
4572 | ||
4573 | ret |= _verify_back_channel_attr(headerpadsz); | |
4574 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4575 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4576 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4577 | ret |= _verify_back_channel_attr(max_ops); | |
4578 | ret |= _verify_back_channel_attr(max_reqs); | |
4579 | ||
4580 | return ret; | |
4581 | } | |
4582 | ||
fc931582 AA |
4583 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
4584 | { | |
4585 | struct nfs4_session *session = clp->cl_session; | |
4586 | struct nfs41_create_session_args args = { | |
4587 | .client = clp, | |
4588 | .cb_program = NFS4_CALLBACK, | |
4589 | }; | |
4590 | struct nfs41_create_session_res res = { | |
4591 | .client = clp, | |
4592 | }; | |
4593 | struct rpc_message msg = { | |
4594 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4595 | .rpc_argp = &args, | |
4596 | .rpc_resp = &res, | |
4597 | }; | |
4598 | int status; | |
4599 | ||
4600 | nfs4_init_channel_attrs(&args); | |
4601 | args.flags = (SESSION4_PERSIST); | |
4602 | ||
4603 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4604 | ||
8d35301d AA |
4605 | if (!status) |
4606 | /* Verify the session's negotiated channel_attrs values */ | |
4607 | status = nfs4_verify_channel_attrs(&args, session); | |
fc931582 AA |
4608 | if (!status) { |
4609 | /* Increment the clientid slot sequence id */ | |
4610 | clp->cl_seqid++; | |
4611 | } | |
4612 | ||
4613 | return status; | |
4614 | } | |
4615 | ||
4616 | /* | |
4617 | * Issues a CREATE_SESSION operation to the server. | |
4618 | * It is the responsibility of the caller to verify the session is | |
4619 | * expired before calling this routine. | |
4620 | */ | |
ac72b7b3 | 4621 | int nfs4_proc_create_session(struct nfs_client *clp, int reset) |
fc931582 AA |
4622 | { |
4623 | int status; | |
4624 | unsigned *ptr; | |
4625 | struct nfs_fsinfo fsinfo; | |
4626 | struct nfs4_session *session = clp->cl_session; | |
4627 | ||
4628 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4629 | ||
4630 | status = _nfs4_proc_create_session(clp); | |
4631 | if (status) | |
4632 | goto out; | |
4633 | ||
ac72b7b3 AA |
4634 | /* Init or reset the fore channel */ |
4635 | if (reset) | |
4636 | status = nfs4_reset_slot_table(session); | |
4637 | else | |
4638 | status = nfs4_init_slot_table(session); | |
fc931582 AA |
4639 | dprintk("fore channel slot table initialization returned %d\n", status); |
4640 | if (status) | |
4641 | goto out; | |
4642 | ||
4643 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4644 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4645 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
4646 | ||
ac72b7b3 AA |
4647 | if (reset) |
4648 | /* Lease time is aleady set */ | |
4649 | goto out; | |
4650 | ||
fc931582 AA |
4651 | /* Get the lease time */ |
4652 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
4653 | if (status == 0) { | |
4654 | /* Update lease time and schedule renewal */ | |
4655 | spin_lock(&clp->cl_lock); | |
4656 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
4657 | clp->cl_last_renewal = jiffies; | |
4658 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
4659 | spin_unlock(&clp->cl_lock); | |
4660 | ||
4661 | nfs4_schedule_state_renewal(clp); | |
4662 | } | |
4663 | out: | |
4664 | dprintk("<-- %s\n", __func__); | |
4665 | return status; | |
4666 | } | |
4667 | ||
0f3e66c6 AA |
4668 | /* |
4669 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
4670 | * The caller must serialize access to this routine. | |
4671 | */ | |
4672 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
4673 | { | |
4674 | int status = 0; | |
4675 | struct rpc_message msg; | |
4676 | ||
4677 | dprintk("--> nfs4_proc_destroy_session\n"); | |
4678 | ||
4679 | /* session is still being setup */ | |
4680 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
4681 | return status; | |
4682 | ||
4683 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
4684 | msg.rpc_argp = session; | |
4685 | msg.rpc_resp = NULL; | |
4686 | msg.rpc_cred = NULL; | |
4687 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4688 | ||
4689 | if (status) | |
4690 | printk(KERN_WARNING | |
4691 | "Got error %d from the server on DESTROY_SESSION. " | |
4692 | "Session has been destroyed regardless...\n", status); | |
4693 | ||
4694 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
4695 | return status; | |
4696 | } | |
4697 | ||
fc01cea9 AA |
4698 | /* |
4699 | * Renew the cl_session lease. | |
4700 | */ | |
4701 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
4702 | { | |
4703 | struct nfs4_sequence_args args; | |
4704 | struct nfs4_sequence_res res; | |
4705 | ||
4706 | struct rpc_message msg = { | |
4707 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
4708 | .rpc_argp = &args, | |
4709 | .rpc_resp = &res, | |
4710 | .rpc_cred = cred, | |
4711 | }; | |
4712 | ||
4713 | args.sa_cache_this = 0; | |
4714 | ||
4715 | return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args, | |
4716 | &res, 0); | |
4717 | } | |
4718 | ||
4719 | void nfs41_sequence_call_done(struct rpc_task *task, void *data) | |
4720 | { | |
4721 | struct nfs_client *clp = (struct nfs_client *)data; | |
4722 | ||
4723 | nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status); | |
4724 | ||
4725 | if (task->tk_status < 0) { | |
4726 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
4727 | ||
4728 | if (_nfs4_async_handle_error(task, NULL, clp, NULL) | |
4729 | == -EAGAIN) { | |
eedc020e | 4730 | nfs4_restart_rpc(task, clp); |
fc01cea9 AA |
4731 | return; |
4732 | } | |
4733 | } | |
4734 | nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp); | |
4735 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); | |
4736 | ||
4737 | put_rpccred(task->tk_msg.rpc_cred); | |
4738 | kfree(task->tk_msg.rpc_argp); | |
4739 | kfree(task->tk_msg.rpc_resp); | |
4740 | ||
4741 | dprintk("<-- %s\n", __func__); | |
4742 | } | |
4743 | ||
4744 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
4745 | { | |
4746 | struct nfs_client *clp; | |
4747 | struct nfs4_sequence_args *args; | |
4748 | struct nfs4_sequence_res *res; | |
4749 | ||
4750 | clp = (struct nfs_client *)data; | |
4751 | args = task->tk_msg.rpc_argp; | |
4752 | res = task->tk_msg.rpc_resp; | |
4753 | ||
4754 | if (nfs4_setup_sequence(clp, args, res, 0, task)) | |
4755 | return; | |
4756 | rpc_call_start(task); | |
4757 | } | |
4758 | ||
4759 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
4760 | .rpc_call_done = nfs41_sequence_call_done, | |
4761 | .rpc_call_prepare = nfs41_sequence_prepare, | |
4762 | }; | |
4763 | ||
4764 | static int nfs41_proc_async_sequence(struct nfs_client *clp, | |
4765 | struct rpc_cred *cred) | |
4766 | { | |
4767 | struct nfs4_sequence_args *args; | |
4768 | struct nfs4_sequence_res *res; | |
4769 | struct rpc_message msg = { | |
4770 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
4771 | .rpc_cred = cred, | |
4772 | }; | |
4773 | ||
4774 | args = kzalloc(sizeof(*args), GFP_KERNEL); | |
4775 | if (!args) | |
4776 | return -ENOMEM; | |
4777 | res = kzalloc(sizeof(*res), GFP_KERNEL); | |
4778 | if (!res) { | |
4779 | kfree(args); | |
4780 | return -ENOMEM; | |
4781 | } | |
4782 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4783 | msg.rpc_argp = args; | |
4784 | msg.rpc_resp = res; | |
4785 | ||
4786 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
4787 | &nfs41_sequence_ops, (void *)clp); | |
4788 | } | |
4789 | ||
557134a3 AA |
4790 | #endif /* CONFIG_NFS_V4_1 */ |
4791 | ||
591d71cb | 4792 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
7eff03ae | 4793 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 4794 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
4795 | .recover_open = nfs4_open_reclaim, |
4796 | .recover_lock = nfs4_lock_reclaim, | |
591d71cb | 4797 | .establish_clid = nfs4_init_clientid, |
90a16617 | 4798 | .get_clid_cred = nfs4_get_setclientid_cred, |
1da177e4 LT |
4799 | }; |
4800 | ||
591d71cb AA |
4801 | #if defined(CONFIG_NFS_V4_1) |
4802 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
4803 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
4804 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
4805 | .recover_open = nfs4_open_reclaim, | |
4806 | .recover_lock = nfs4_lock_reclaim, | |
4807 | .establish_clid = nfs4_proc_exchange_id, | |
b4b82607 | 4808 | .get_clid_cred = nfs4_get_exchange_id_cred, |
591d71cb AA |
4809 | }; |
4810 | #endif /* CONFIG_NFS_V4_1 */ | |
4811 | ||
4812 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
4813 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
4814 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
4815 | .recover_open = nfs4_open_expired, | |
4816 | .recover_lock = nfs4_lock_expired, | |
4817 | .establish_clid = nfs4_init_clientid, | |
90a16617 | 4818 | .get_clid_cred = nfs4_get_setclientid_cred, |
591d71cb AA |
4819 | }; |
4820 | ||
4821 | #if defined(CONFIG_NFS_V4_1) | |
4822 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
7eff03ae | 4823 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 4824 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
4825 | .recover_open = nfs4_open_expired, |
4826 | .recover_lock = nfs4_lock_expired, | |
591d71cb | 4827 | .establish_clid = nfs4_proc_exchange_id, |
b4b82607 | 4828 | .get_clid_cred = nfs4_get_exchange_id_cred, |
1da177e4 | 4829 | }; |
591d71cb | 4830 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 | 4831 | |
29fba38b BH |
4832 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
4833 | .sched_state_renewal = nfs4_proc_async_renew, | |
a7b72103 | 4834 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
8e69514f | 4835 | .renew_lease = nfs4_proc_renew, |
29fba38b BH |
4836 | }; |
4837 | ||
4838 | #if defined(CONFIG_NFS_V4_1) | |
4839 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
4840 | .sched_state_renewal = nfs41_proc_async_sequence, | |
a7b72103 | 4841 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
8e69514f | 4842 | .renew_lease = nfs4_proc_sequence, |
29fba38b BH |
4843 | }; |
4844 | #endif | |
4845 | ||
4846 | /* | |
4847 | * Per minor version reboot and network partition recovery ops | |
4848 | */ | |
4849 | ||
591d71cb AA |
4850 | struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = { |
4851 | &nfs40_reboot_recovery_ops, | |
4852 | #if defined(CONFIG_NFS_V4_1) | |
4853 | &nfs41_reboot_recovery_ops, | |
4854 | #endif | |
4855 | }; | |
4856 | ||
4857 | struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = { | |
4858 | &nfs40_nograce_recovery_ops, | |
4859 | #if defined(CONFIG_NFS_V4_1) | |
4860 | &nfs41_nograce_recovery_ops, | |
4861 | #endif | |
4862 | }; | |
4863 | ||
29fba38b BH |
4864 | struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = { |
4865 | &nfs40_state_renewal_ops, | |
4866 | #if defined(CONFIG_NFS_V4_1) | |
4867 | &nfs41_state_renewal_ops, | |
4868 | #endif | |
4869 | }; | |
4870 | ||
92e1d5be | 4871 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
4872 | .permission = nfs_permission, |
4873 | .getattr = nfs_getattr, | |
4874 | .setattr = nfs_setattr, | |
4875 | .getxattr = nfs4_getxattr, | |
4876 | .setxattr = nfs4_setxattr, | |
4877 | .listxattr = nfs4_listxattr, | |
4878 | }; | |
4879 | ||
509de811 | 4880 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
4881 | .version = 4, /* protocol version */ |
4882 | .dentry_ops = &nfs4_dentry_operations, | |
4883 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 4884 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
4885 | .getroot = nfs4_proc_get_root, |
4886 | .getattr = nfs4_proc_getattr, | |
4887 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 4888 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
4889 | .lookup = nfs4_proc_lookup, |
4890 | .access = nfs4_proc_access, | |
4891 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
4892 | .create = nfs4_proc_create, |
4893 | .remove = nfs4_proc_remove, | |
4894 | .unlink_setup = nfs4_proc_unlink_setup, | |
4895 | .unlink_done = nfs4_proc_unlink_done, | |
4896 | .rename = nfs4_proc_rename, | |
4897 | .link = nfs4_proc_link, | |
4898 | .symlink = nfs4_proc_symlink, | |
4899 | .mkdir = nfs4_proc_mkdir, | |
4900 | .rmdir = nfs4_proc_remove, | |
4901 | .readdir = nfs4_proc_readdir, | |
4902 | .mknod = nfs4_proc_mknod, | |
4903 | .statfs = nfs4_proc_statfs, | |
4904 | .fsinfo = nfs4_proc_fsinfo, | |
4905 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 4906 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
4907 | .decode_dirent = nfs4_decode_dirent, |
4908 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 4909 | .read_done = nfs4_read_done, |
1da177e4 | 4910 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 4911 | .write_done = nfs4_write_done, |
1da177e4 | 4912 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 4913 | .commit_done = nfs4_commit_done, |
1da177e4 | 4914 | .lock = nfs4_proc_lock, |
e50a1c2e | 4915 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 4916 | .close_context = nfs4_close_context, |
1da177e4 LT |
4917 | }; |
4918 | ||
4919 | /* | |
4920 | * Local variables: | |
4921 | * c-basic-offset: 8 | |
4922 | * End: | |
4923 | */ |