Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
1da177e4 LT |
39 | #include <linux/delay.h> |
40 | #include <linux/errno.h> | |
41 | #include <linux/string.h> | |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 LT |
43 | #include <linux/sunrpc/clnt.h> |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
1da177e4 | 48 | #include <linux/namei.h> |
02a913a7 | 49 | #include <linux/mount.h> |
99fe60d0 | 50 | #include <linux/module.h> |
5a0ffe54 | 51 | #include <linux/sunrpc/bc_xprt.h> |
1da177e4 | 52 | |
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 | 54 | #include "delegation.h" |
101070ca | 55 | #include "internal.h" |
006ea73e | 56 | #include "iostat.h" |
fc931582 | 57 | #include "callback.h" |
1da177e4 LT |
58 | |
59 | #define NFSDBG_FACILITY NFSDBG_PROC | |
60 | ||
2066fe89 | 61 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
62 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
63 | ||
a78cb57a TM |
64 | #define NFS4_MAX_LOOP_ON_RECOVER (10) |
65 | ||
cdd4e68b | 66 | struct nfs4_opendata; |
864472e9 | 67 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
b257957e | 68 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data); |
1da177e4 | 69 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 70 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
71 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
72 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
1da177e4 | 73 | |
1da177e4 | 74 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 75 | static int nfs4_map_errors(int err) |
1da177e4 | 76 | { |
52567b03 TM |
77 | if (err >= -1000) |
78 | return err; | |
79 | switch (err) { | |
80 | case -NFS4ERR_RESOURCE: | |
81 | return -EREMOTEIO; | |
82 | default: | |
1da177e4 | 83 | dprintk("%s could not handle NFSv4 error %d\n", |
3110ff80 | 84 | __func__, -err); |
52567b03 | 85 | break; |
1da177e4 | 86 | } |
52567b03 | 87 | return -EIO; |
1da177e4 LT |
88 | } |
89 | ||
90 | /* | |
91 | * This is our standard bitmap for GETATTR requests. | |
92 | */ | |
93 | const u32 nfs4_fattr_bitmap[2] = { | |
94 | FATTR4_WORD0_TYPE | |
95 | | FATTR4_WORD0_CHANGE | |
96 | | FATTR4_WORD0_SIZE | |
97 | | FATTR4_WORD0_FSID | |
98 | | FATTR4_WORD0_FILEID, | |
99 | FATTR4_WORD1_MODE | |
100 | | FATTR4_WORD1_NUMLINKS | |
101 | | FATTR4_WORD1_OWNER | |
102 | | FATTR4_WORD1_OWNER_GROUP | |
103 | | FATTR4_WORD1_RAWDEV | |
104 | | FATTR4_WORD1_SPACE_USED | |
105 | | FATTR4_WORD1_TIME_ACCESS | |
106 | | FATTR4_WORD1_TIME_METADATA | |
107 | | FATTR4_WORD1_TIME_MODIFY | |
108 | }; | |
109 | ||
110 | const u32 nfs4_statfs_bitmap[2] = { | |
111 | FATTR4_WORD0_FILES_AVAIL | |
112 | | FATTR4_WORD0_FILES_FREE | |
113 | | FATTR4_WORD0_FILES_TOTAL, | |
114 | FATTR4_WORD1_SPACE_AVAIL | |
115 | | FATTR4_WORD1_SPACE_FREE | |
116 | | FATTR4_WORD1_SPACE_TOTAL | |
117 | }; | |
118 | ||
4ce79717 | 119 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
120 | FATTR4_WORD0_MAXLINK |
121 | | FATTR4_WORD0_MAXNAME, | |
122 | 0 | |
123 | }; | |
124 | ||
125 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
126 | | FATTR4_WORD0_MAXREAD | |
127 | | FATTR4_WORD0_MAXWRITE | |
128 | | FATTR4_WORD0_LEASE_TIME, | |
129 | 0 | |
130 | }; | |
131 | ||
830b8e33 MN |
132 | const u32 nfs4_fs_locations_bitmap[2] = { |
133 | FATTR4_WORD0_TYPE | |
134 | | FATTR4_WORD0_CHANGE | |
135 | | FATTR4_WORD0_SIZE | |
136 | | FATTR4_WORD0_FSID | |
137 | | FATTR4_WORD0_FILEID | |
138 | | FATTR4_WORD0_FS_LOCATIONS, | |
139 | FATTR4_WORD1_MODE | |
140 | | FATTR4_WORD1_NUMLINKS | |
141 | | FATTR4_WORD1_OWNER | |
142 | | FATTR4_WORD1_OWNER_GROUP | |
143 | | FATTR4_WORD1_RAWDEV | |
144 | | FATTR4_WORD1_SPACE_USED | |
145 | | FATTR4_WORD1_TIME_ACCESS | |
146 | | FATTR4_WORD1_TIME_METADATA | |
147 | | FATTR4_WORD1_TIME_MODIFY | |
148 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
149 | }; | |
150 | ||
bc4785cd | 151 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
152 | struct nfs4_readdir_arg *readdir) |
153 | { | |
0dbb4c67 | 154 | __be32 *start, *p; |
1da177e4 LT |
155 | |
156 | BUG_ON(readdir->count < 80); | |
157 | if (cookie > 2) { | |
b7ef1956 | 158 | readdir->cookie = cookie; |
1da177e4 LT |
159 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
160 | return; | |
161 | } | |
162 | ||
163 | readdir->cookie = 0; | |
164 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
165 | if (cookie == 2) | |
166 | return; | |
167 | ||
168 | /* | |
169 | * NFSv4 servers do not return entries for '.' and '..' | |
170 | * Therefore, we fake these entries here. We let '.' | |
171 | * have cookie 0 and '..' have cookie 1. Note that | |
172 | * when talking to the server, we always send cookie 0 | |
173 | * instead of 1 or 2. | |
174 | */ | |
0dbb4c67 | 175 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
176 | |
177 | if (cookie == 0) { | |
178 | *p++ = xdr_one; /* next */ | |
179 | *p++ = xdr_zero; /* cookie, first word */ | |
180 | *p++ = xdr_one; /* cookie, second word */ | |
181 | *p++ = xdr_one; /* entry len */ | |
182 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
183 | p++; | |
184 | *p++ = xdr_one; /* bitmap length */ | |
185 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
186 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 187 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
188 | } |
189 | ||
190 | *p++ = xdr_one; /* next */ | |
191 | *p++ = xdr_zero; /* cookie, first word */ | |
192 | *p++ = xdr_two; /* cookie, second word */ | |
193 | *p++ = xdr_two; /* entry len */ | |
194 | memcpy(p, "..\0\0", 4); /* entry */ | |
195 | p++; | |
196 | *p++ = xdr_one; /* bitmap length */ | |
197 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
198 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 199 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
200 | |
201 | readdir->pgbase = (char *)p - (char *)start; | |
202 | readdir->count -= readdir->pgbase; | |
203 | kunmap_atomic(start, KM_USER0); | |
204 | } | |
205 | ||
65de872e TM |
206 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
207 | { | |
208 | int res; | |
209 | ||
210 | might_sleep(); | |
211 | ||
e005e804 | 212 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 213 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
214 | return res; |
215 | } | |
216 | ||
217 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
218 | { | |
219 | int res = 0; | |
220 | ||
221 | might_sleep(); | |
222 | ||
223 | if (*timeout <= 0) | |
224 | *timeout = NFS4_POLL_RETRY_MIN; | |
225 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
226 | *timeout = NFS4_POLL_RETRY_MAX; | |
227 | schedule_timeout_killable(*timeout); | |
228 | if (fatal_signal_pending(current)) | |
229 | res = -ERESTARTSYS; | |
230 | *timeout <<= 1; | |
231 | return res; | |
232 | } | |
233 | ||
234 | /* This is the error handling routine for processes that are allowed | |
235 | * to sleep. | |
236 | */ | |
237 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
238 | { | |
239 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 240 | struct nfs4_state *state = exception->state; |
65de872e TM |
241 | int ret = errorcode; |
242 | ||
243 | exception->retry = 0; | |
244 | switch(errorcode) { | |
245 | case 0: | |
246 | return 0; | |
9e33bed5 TM |
247 | case -NFS4ERR_ADMIN_REVOKED: |
248 | case -NFS4ERR_BAD_STATEID: | |
249 | case -NFS4ERR_OPENMODE: | |
250 | if (state == NULL) | |
251 | break; | |
252 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 253 | goto do_state_recovery; |
65de872e | 254 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
255 | if (state == NULL) |
256 | break; | |
257 | nfs4_state_mark_reclaim_reboot(clp, state); | |
258 | case -NFS4ERR_STALE_CLIENTID: | |
65de872e | 259 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 260 | goto do_state_recovery; |
03391693 | 261 | #if defined(CONFIG_NFS_V4_1) |
4745e315 AA |
262 | case -NFS4ERR_BADSESSION: |
263 | case -NFS4ERR_BADSLOT: | |
264 | case -NFS4ERR_BAD_HIGH_SLOT: | |
265 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
266 | case -NFS4ERR_DEADSESSION: | |
267 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
268 | case -NFS4ERR_SEQ_MISORDERED: | |
269 | dprintk("%s ERROR: %d Reset session\n", __func__, | |
270 | errorcode); | |
0b9e2d41 | 271 | nfs4_schedule_state_recovery(clp); |
4745e315 | 272 | exception->retry = 1; |
b9179237 | 273 | break; |
03391693 | 274 | #endif /* defined(CONFIG_NFS_V4_1) */ |
65de872e | 275 | case -NFS4ERR_FILE_OPEN: |
44ed3556 N |
276 | if (exception->timeout > HZ) { |
277 | /* We have retried a decent amount, time to | |
278 | * fail | |
279 | */ | |
280 | ret = -EBUSY; | |
281 | break; | |
282 | } | |
65de872e TM |
283 | case -NFS4ERR_GRACE: |
284 | case -NFS4ERR_DELAY: | |
2c643488 | 285 | case -EKEYEXPIRED: |
65de872e TM |
286 | ret = nfs4_delay(server->client, &exception->timeout); |
287 | if (ret != 0) | |
288 | break; | |
289 | case -NFS4ERR_OLD_STATEID: | |
290 | exception->retry = 1; | |
291 | } | |
292 | /* We failed to handle the error */ | |
293 | return nfs4_map_errors(ret); | |
a2c0b9e2 TM |
294 | do_state_recovery: |
295 | nfs4_schedule_state_recovery(clp); | |
296 | ret = nfs4_wait_clnt_recover(clp); | |
297 | if (ret == 0) | |
298 | exception->retry = 1; | |
299 | return ret; | |
65de872e TM |
300 | } |
301 | ||
302 | ||
26e976a8 | 303 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 304 | { |
7539bbab | 305 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
306 | spin_lock(&clp->cl_lock); |
307 | if (time_before(clp->cl_last_renewal,timestamp)) | |
308 | clp->cl_last_renewal = timestamp; | |
309 | spin_unlock(&clp->cl_lock); | |
310 | } | |
311 | ||
cccef3b9 AA |
312 | #if defined(CONFIG_NFS_V4_1) |
313 | ||
e2c4ab3c AA |
314 | /* |
315 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
316 | * | |
317 | * freeing a slot is trivially done by clearing its respective bit | |
318 | * in the bitmap. | |
319 | * If the freed slotid equals highest_used_slotid we want to update it | |
320 | * so that the server would be able to size down the slot table if needed, | |
321 | * otherwise we know that the highest_used_slotid is still in use. | |
322 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
323 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
324 | * highest slotid in use. | |
325 | * If none found, highest_used_slotid is set to -1. | |
35dc1d74 TM |
326 | * |
327 | * Must be called while holding tbl->slot_tbl_lock | |
e2c4ab3c AA |
328 | */ |
329 | static void | |
330 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
331 | { | |
332 | int slotid = free_slotid; | |
333 | ||
e2c4ab3c AA |
334 | /* clear used bit in bitmap */ |
335 | __clear_bit(slotid, tbl->used_slots); | |
336 | ||
337 | /* update highest_used_slotid when it is freed */ | |
338 | if (slotid == tbl->highest_used_slotid) { | |
339 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
bcb56164 | 340 | if (slotid < tbl->max_slots) |
e2c4ab3c AA |
341 | tbl->highest_used_slotid = slotid; |
342 | else | |
343 | tbl->highest_used_slotid = -1; | |
344 | } | |
e2c4ab3c AA |
345 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, |
346 | free_slotid, tbl->highest_used_slotid); | |
347 | } | |
348 | ||
3bfb0fc5 AB |
349 | /* |
350 | * Signal state manager thread if session is drained | |
351 | */ | |
352 | static void nfs41_check_drain_session_complete(struct nfs4_session *ses) | |
353 | { | |
689cf5c1 AB |
354 | struct rpc_task *task; |
355 | ||
3bfb0fc5 | 356 | if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) { |
689cf5c1 AB |
357 | task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq); |
358 | if (task) | |
359 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
3bfb0fc5 AB |
360 | return; |
361 | } | |
362 | ||
363 | if (ses->fc_slot_table.highest_used_slotid != -1) | |
364 | return; | |
365 | ||
366 | dprintk("%s COMPLETE: Session Drained\n", __func__); | |
367 | complete(&ses->complete); | |
368 | } | |
369 | ||
d61e612a | 370 | static void nfs41_sequence_free_slot(const struct nfs_client *clp, |
13615871 AA |
371 | struct nfs4_sequence_res *res) |
372 | { | |
373 | struct nfs4_slot_table *tbl; | |
374 | ||
13615871 AA |
375 | tbl = &clp->cl_session->fc_slot_table; |
376 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { | |
13615871 AA |
377 | /* just wake up the next guy waiting since |
378 | * we may have not consumed a slot after all */ | |
691daf3b | 379 | dprintk("%s: No slot\n", __func__); |
35dc1d74 | 380 | return; |
13615871 | 381 | } |
ea028ac9 | 382 | |
35dc1d74 TM |
383 | spin_lock(&tbl->slot_tbl_lock); |
384 | nfs4_free_slot(tbl, res->sr_slotid); | |
3bfb0fc5 | 385 | nfs41_check_drain_session_complete(clp->cl_session); |
35dc1d74 TM |
386 | spin_unlock(&tbl->slot_tbl_lock); |
387 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
13615871 AA |
388 | } |
389 | ||
b0df806c AA |
390 | static void nfs41_sequence_done(struct nfs_client *clp, |
391 | struct nfs4_sequence_res *res, | |
392 | int rpc_status) | |
393 | { | |
394 | unsigned long timestamp; | |
395 | struct nfs4_slot_table *tbl; | |
396 | struct nfs4_slot *slot; | |
397 | ||
398 | /* | |
399 | * sr_status remains 1 if an RPC level error occurred. The server | |
400 | * may or may not have processed the sequence operation.. | |
401 | * Proceed as if the server received and processed the sequence | |
402 | * operation. | |
403 | */ | |
404 | if (res->sr_status == 1) | |
405 | res->sr_status = NFS_OK; | |
406 | ||
407 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
408 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
409 | goto out; | |
410 | ||
691daf3b | 411 | /* Check the SEQUENCE operation status */ |
b0df806c | 412 | if (res->sr_status == 0) { |
691daf3b AA |
413 | tbl = &clp->cl_session->fc_slot_table; |
414 | slot = tbl->slots + res->sr_slotid; | |
b0df806c AA |
415 | /* Update the slot's sequence and clientid lease timer */ |
416 | ++slot->seq_nr; | |
417 | timestamp = res->sr_renewal_time; | |
418 | spin_lock(&clp->cl_lock); | |
419 | if (time_before(clp->cl_last_renewal, timestamp)) | |
420 | clp->cl_last_renewal = timestamp; | |
421 | spin_unlock(&clp->cl_lock); | |
0629e370 | 422 | /* Check sequence flags */ |
7135840f AB |
423 | if (atomic_read(&clp->cl_count) > 1) |
424 | nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); | |
b0df806c AA |
425 | } |
426 | out: | |
427 | /* The session may be reset by one of the error handlers. */ | |
428 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
429 | nfs41_sequence_free_slot(clp, res); | |
430 | } | |
431 | ||
510b8175 BH |
432 | /* |
433 | * nfs4_find_slot - efficiently look for a free slot | |
434 | * | |
435 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
436 | * If found, we mark the slot as used, update the highest_used_slotid, | |
437 | * and respectively set up the sequence operation args. | |
438 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
439 | * |
440 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
441 | */ |
442 | static u8 | |
40ead580 | 443 | nfs4_find_slot(struct nfs4_slot_table *tbl) |
510b8175 BH |
444 | { |
445 | int slotid; | |
446 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
447 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
448 | ||
510b8175 BH |
449 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
450 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
451 | tbl->max_slots); | |
452 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
453 | if (slotid >= tbl->max_slots) | |
454 | goto out; | |
455 | __set_bit(slotid, tbl->used_slots); | |
456 | if (slotid > tbl->highest_used_slotid) | |
457 | tbl->highest_used_slotid = slotid; | |
458 | ret_id = slotid; | |
459 | out: | |
460 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
461 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
462 | return ret_id; |
463 | } | |
464 | ||
ce5039c1 AA |
465 | static int nfs41_setup_sequence(struct nfs4_session *session, |
466 | struct nfs4_sequence_args *args, | |
467 | struct nfs4_sequence_res *res, | |
468 | int cache_reply, | |
469 | struct rpc_task *task) | |
470 | { | |
fbcd4abc AA |
471 | struct nfs4_slot *slot; |
472 | struct nfs4_slot_table *tbl; | |
473 | u8 slotid; | |
474 | ||
475 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
476 | /* slot already allocated? */ |
477 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
478 | return 0; | |
479 | ||
480 | memset(res, 0, sizeof(*res)); | |
481 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
fbcd4abc AA |
482 | tbl = &session->fc_slot_table; |
483 | ||
484 | spin_lock(&tbl->slot_tbl_lock); | |
5601a00d AB |
485 | if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) && |
486 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
ea028ac9 AA |
487 | /* |
488 | * The state manager will wait until the slot table is empty. | |
489 | * Schedule the reset thread | |
490 | */ | |
05f0d236 | 491 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); |
b069d94a | 492 | spin_unlock(&tbl->slot_tbl_lock); |
bcb56164 | 493 | dprintk("%s Schedule Session Reset\n", __func__); |
05f0d236 | 494 | return -EAGAIN; |
b069d94a AA |
495 | } |
496 | ||
689cf5c1 AB |
497 | if (!rpc_queue_empty(&tbl->slot_tbl_waitq) && |
498 | !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) { | |
499 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
500 | spin_unlock(&tbl->slot_tbl_lock); | |
501 | dprintk("%s enforce FIFO order\n", __func__); | |
502 | return -EAGAIN; | |
503 | } | |
504 | ||
40ead580 | 505 | slotid = nfs4_find_slot(tbl); |
fbcd4abc AA |
506 | if (slotid == NFS4_MAX_SLOT_TABLE) { |
507 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
508 | spin_unlock(&tbl->slot_tbl_lock); | |
509 | dprintk("<-- %s: no free slots\n", __func__); | |
510 | return -EAGAIN; | |
511 | } | |
512 | spin_unlock(&tbl->slot_tbl_lock); | |
513 | ||
689cf5c1 | 514 | rpc_task_set_priority(task, RPC_PRIORITY_NORMAL); |
fbcd4abc | 515 | slot = tbl->slots + slotid; |
99fe60d0 | 516 | args->sa_session = session; |
fbcd4abc AA |
517 | args->sa_slotid = slotid; |
518 | args->sa_cache_this = cache_reply; | |
519 | ||
520 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
521 | ||
99fe60d0 | 522 | res->sr_session = session; |
fbcd4abc AA |
523 | res->sr_slotid = slotid; |
524 | res->sr_renewal_time = jiffies; | |
525 | /* | |
526 | * sr_status is only set in decode_sequence, and so will remain | |
527 | * set to 1 if an rpc level failure occurs. | |
528 | */ | |
529 | res->sr_status = 1; | |
ce5039c1 AA |
530 | return 0; |
531 | } | |
532 | ||
533 | int nfs4_setup_sequence(struct nfs_client *clp, | |
534 | struct nfs4_sequence_args *args, | |
535 | struct nfs4_sequence_res *res, | |
536 | int cache_reply, | |
537 | struct rpc_task *task) | |
538 | { | |
539 | int ret = 0; | |
540 | ||
541 | dprintk("--> %s clp %p session %p sr_slotid %d\n", | |
542 | __func__, clp, clp->cl_session, res->sr_slotid); | |
543 | ||
544 | if (!nfs4_has_session(clp)) | |
545 | goto out; | |
546 | ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, | |
547 | task); | |
2628eddf | 548 | if (ret && ret != -EAGAIN) { |
ce5039c1 AA |
549 | /* terminate rpc task */ |
550 | task->tk_status = ret; | |
551 | task->tk_action = NULL; | |
552 | } | |
553 | out: | |
554 | dprintk("<-- %s status=%d\n", __func__, ret); | |
555 | return ret; | |
556 | } | |
557 | ||
558 | struct nfs41_call_sync_data { | |
559 | struct nfs_client *clp; | |
560 | struct nfs4_sequence_args *seq_args; | |
561 | struct nfs4_sequence_res *seq_res; | |
562 | int cache_reply; | |
563 | }; | |
564 | ||
565 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
566 | { | |
567 | struct nfs41_call_sync_data *data = calldata; | |
568 | ||
569 | dprintk("--> %s data->clp->cl_session %p\n", __func__, | |
570 | data->clp->cl_session); | |
571 | if (nfs4_setup_sequence(data->clp, data->seq_args, | |
572 | data->seq_res, data->cache_reply, task)) | |
573 | return; | |
574 | rpc_call_start(task); | |
575 | } | |
576 | ||
b257957e AB |
577 | static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata) |
578 | { | |
579 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
580 | nfs41_call_sync_prepare(task, calldata); | |
581 | } | |
582 | ||
69ab40c4 AA |
583 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
584 | { | |
585 | struct nfs41_call_sync_data *data = calldata; | |
586 | ||
587 | nfs41_sequence_done(data->clp, data->seq_res, task->tk_status); | |
69ab40c4 AA |
588 | } |
589 | ||
ce5039c1 AA |
590 | struct rpc_call_ops nfs41_call_sync_ops = { |
591 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 592 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
593 | }; |
594 | ||
b257957e AB |
595 | struct rpc_call_ops nfs41_call_priv_sync_ops = { |
596 | .rpc_call_prepare = nfs41_call_priv_sync_prepare, | |
597 | .rpc_call_done = nfs41_call_sync_done, | |
598 | }; | |
599 | ||
ce5039c1 AA |
600 | static int nfs4_call_sync_sequence(struct nfs_client *clp, |
601 | struct rpc_clnt *clnt, | |
602 | struct rpc_message *msg, | |
603 | struct nfs4_sequence_args *args, | |
604 | struct nfs4_sequence_res *res, | |
b257957e AB |
605 | int cache_reply, |
606 | int privileged) | |
ce5039c1 AA |
607 | { |
608 | int ret; | |
609 | struct rpc_task *task; | |
610 | struct nfs41_call_sync_data data = { | |
611 | .clp = clp, | |
612 | .seq_args = args, | |
613 | .seq_res = res, | |
614 | .cache_reply = cache_reply, | |
615 | }; | |
616 | struct rpc_task_setup task_setup = { | |
617 | .rpc_client = clnt, | |
618 | .rpc_message = msg, | |
619 | .callback_ops = &nfs41_call_sync_ops, | |
620 | .callback_data = &data | |
621 | }; | |
622 | ||
623 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
b257957e AB |
624 | if (privileged) |
625 | task_setup.callback_ops = &nfs41_call_priv_sync_ops; | |
ce5039c1 AA |
626 | task = rpc_run_task(&task_setup); |
627 | if (IS_ERR(task)) | |
628 | ret = PTR_ERR(task); | |
629 | else { | |
630 | ret = task->tk_status; | |
631 | rpc_put_task(task); | |
632 | } | |
633 | return ret; | |
634 | } | |
635 | ||
cccef3b9 AA |
636 | int _nfs4_call_sync_session(struct nfs_server *server, |
637 | struct rpc_message *msg, | |
638 | struct nfs4_sequence_args *args, | |
639 | struct nfs4_sequence_res *res, | |
640 | int cache_reply) | |
641 | { | |
ce5039c1 | 642 | return nfs4_call_sync_sequence(server->nfs_client, server->client, |
b257957e | 643 | msg, args, res, cache_reply, 0); |
cccef3b9 AA |
644 | } |
645 | ||
646 | #endif /* CONFIG_NFS_V4_1 */ | |
647 | ||
648 | int _nfs4_call_sync(struct nfs_server *server, | |
649 | struct rpc_message *msg, | |
650 | struct nfs4_sequence_args *args, | |
651 | struct nfs4_sequence_res *res, | |
652 | int cache_reply) | |
653 | { | |
f3752975 | 654 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
655 | return rpc_call_sync(server->client, msg, 0); |
656 | } | |
657 | ||
658 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
659 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
660 | &(res)->seq_res, (cache_reply)) | |
661 | ||
b0df806c AA |
662 | static void nfs4_sequence_done(const struct nfs_server *server, |
663 | struct nfs4_sequence_res *res, int rpc_status) | |
664 | { | |
665 | #ifdef CONFIG_NFS_V4_1 | |
666 | if (nfs4_has_session(server->nfs_client)) | |
667 | nfs41_sequence_done(server->nfs_client, res, rpc_status); | |
668 | #endif /* CONFIG_NFS_V4_1 */ | |
669 | } | |
670 | ||
38478b24 | 671 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 672 | { |
38478b24 | 673 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 674 | |
38478b24 | 675 | spin_lock(&dir->i_lock); |
40d24704 TM |
676 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
677 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 678 | nfs_force_lookup_revalidate(dir); |
40d24704 | 679 | nfsi->change_attr = cinfo->after; |
38478b24 | 680 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
681 | } |
682 | ||
e56e0b78 | 683 | struct nfs4_opendata { |
c6d00e63 | 684 | struct kref kref; |
e56e0b78 TM |
685 | struct nfs_openargs o_arg; |
686 | struct nfs_openres o_res; | |
cdd4e68b TM |
687 | struct nfs_open_confirmargs c_arg; |
688 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
689 | struct nfs_fattr f_attr; |
690 | struct nfs_fattr dir_attr; | |
ad389da7 | 691 | struct path path; |
e56e0b78 TM |
692 | struct dentry *dir; |
693 | struct nfs4_state_owner *owner; | |
aac00a8d | 694 | struct nfs4_state *state; |
e56e0b78 | 695 | struct iattr attrs; |
26e976a8 | 696 | unsigned long timestamp; |
3e309914 | 697 | unsigned int rpc_done : 1; |
24ac23ab TM |
698 | int rpc_status; |
699 | int cancelled; | |
e56e0b78 TM |
700 | }; |
701 | ||
2ced46c2 TM |
702 | |
703 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
704 | { | |
705 | p->o_res.f_attr = &p->f_attr; | |
706 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
707 | p->o_res.seqid = p->o_arg.seqid; |
708 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
709 | p->o_res.server = p->o_arg.server; |
710 | nfs_fattr_init(&p->f_attr); | |
711 | nfs_fattr_init(&p->dir_attr); | |
578e4585 | 712 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
2ced46c2 TM |
713 | } |
714 | ||
ad389da7 | 715 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 716 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
717 | const struct iattr *attrs) |
718 | { | |
ad389da7 | 719 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
720 | struct inode *dir = parent->d_inode; |
721 | struct nfs_server *server = NFS_SERVER(dir); | |
722 | struct nfs4_opendata *p; | |
723 | ||
724 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
725 | if (p == NULL) | |
726 | goto err; | |
727 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
728 | if (p->o_arg.seqid == NULL) | |
729 | goto err_free; | |
f6948697 AV |
730 | path_get(path); |
731 | p->path = *path; | |
e56e0b78 TM |
732 | p->dir = parent; |
733 | p->owner = sp; | |
734 | atomic_inc(&sp->so_count); | |
735 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
736 | p->o_arg.open_flags = flags; |
737 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 738 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 739 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 740 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
741 | p->o_arg.server = server; |
742 | p->o_arg.bitmask = server->attr_bitmask; | |
743 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
e56e0b78 | 744 | if (flags & O_EXCL) { |
4882ef72 AB |
745 | if (nfs4_has_persistent_session(server->nfs_client)) { |
746 | /* GUARDED */ | |
747 | p->o_arg.u.attrs = &p->attrs; | |
748 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
749 | } else { /* EXCLUSIVE4_1 */ | |
750 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
751 | s[0] = jiffies; | |
752 | s[1] = current->pid; | |
753 | } | |
e56e0b78 TM |
754 | } else if (flags & O_CREAT) { |
755 | p->o_arg.u.attrs = &p->attrs; | |
756 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
757 | } | |
cdd4e68b TM |
758 | p->c_arg.fh = &p->o_res.fh; |
759 | p->c_arg.stateid = &p->o_res.stateid; | |
760 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 761 | nfs4_init_opendata_res(p); |
c6d00e63 | 762 | kref_init(&p->kref); |
e56e0b78 TM |
763 | return p; |
764 | err_free: | |
765 | kfree(p); | |
766 | err: | |
767 | dput(parent); | |
768 | return NULL; | |
769 | } | |
770 | ||
c6d00e63 | 771 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 772 | { |
c6d00e63 TM |
773 | struct nfs4_opendata *p = container_of(kref, |
774 | struct nfs4_opendata, kref); | |
775 | ||
776 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
777 | if (p->state != NULL) |
778 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
779 | nfs4_put_state_owner(p->owner); |
780 | dput(p->dir); | |
31f31db1 | 781 | path_put(&p->path); |
c6d00e63 TM |
782 | kfree(p); |
783 | } | |
784 | ||
785 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
786 | { | |
787 | if (p != NULL) | |
788 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
789 | } |
790 | ||
06f814a3 TM |
791 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
792 | { | |
06f814a3 TM |
793 | int ret; |
794 | ||
06f814a3 | 795 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
796 | return ret; |
797 | } | |
798 | ||
dc0b027d | 799 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
800 | { |
801 | int ret = 0; | |
dc0b027d TM |
802 | |
803 | if (open_mode & O_EXCL) | |
804 | goto out; | |
805 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 | 806 | case FMODE_READ: |
88069f77 TM |
807 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 |
808 | && state->n_rdonly != 0; | |
6ee41268 TM |
809 | break; |
810 | case FMODE_WRITE: | |
88069f77 TM |
811 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 |
812 | && state->n_wronly != 0; | |
6ee41268 TM |
813 | break; |
814 | case FMODE_READ|FMODE_WRITE: | |
88069f77 TM |
815 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 |
816 | && state->n_rdwr != 0; | |
6ee41268 | 817 | } |
dc0b027d | 818 | out: |
6ee41268 TM |
819 | return ret; |
820 | } | |
821 | ||
dc0b027d | 822 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 823 | { |
dc0b027d | 824 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 825 | return 0; |
15c831bf | 826 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 827 | return 0; |
b7391f44 | 828 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
829 | return 1; |
830 | } | |
831 | ||
dc0b027d | 832 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 833 | { |
dc0b027d | 834 | switch (fmode) { |
e7616923 TM |
835 | case FMODE_WRITE: |
836 | state->n_wronly++; | |
837 | break; | |
838 | case FMODE_READ: | |
839 | state->n_rdonly++; | |
840 | break; | |
841 | case FMODE_READ|FMODE_WRITE: | |
842 | state->n_rdwr++; | |
843 | } | |
dc0b027d | 844 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
845 | } |
846 | ||
dc0b027d | 847 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
848 | { |
849 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
850 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
851 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 852 | switch (fmode) { |
003707c7 TM |
853 | case FMODE_READ: |
854 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
855 | break; | |
856 | case FMODE_WRITE: | |
857 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
858 | break; | |
859 | case FMODE_READ|FMODE_WRITE: | |
860 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
861 | } | |
e7616923 TM |
862 | } |
863 | ||
dc0b027d | 864 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 865 | { |
8bda4e4c | 866 | write_seqlock(&state->seqlock); |
dc0b027d | 867 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 868 | write_sequnlock(&state->seqlock); |
003707c7 TM |
869 | } |
870 | ||
dc0b027d | 871 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 872 | { |
8bda4e4c TM |
873 | /* |
874 | * Protect the call to nfs4_state_set_mode_locked and | |
875 | * serialise the stateid update | |
876 | */ | |
877 | write_seqlock(&state->seqlock); | |
003707c7 TM |
878 | if (deleg_stateid != NULL) { |
879 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
880 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
881 | } | |
882 | if (open_stateid != NULL) | |
dc0b027d | 883 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
884 | write_sequnlock(&state->seqlock); |
885 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 886 | update_open_stateflags(state, fmode); |
ec073428 | 887 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
888 | } |
889 | ||
dc0b027d | 890 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
891 | { |
892 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
893 | struct nfs_delegation *deleg_cur; | |
894 | int ret = 0; | |
895 | ||
dc0b027d | 896 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
897 | |
898 | rcu_read_lock(); | |
899 | deleg_cur = rcu_dereference(nfsi->delegation); | |
900 | if (deleg_cur == NULL) | |
901 | goto no_delegation; | |
902 | ||
903 | spin_lock(&deleg_cur->lock); | |
904 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 905 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
906 | goto no_delegation_unlock; |
907 | ||
908 | if (delegation == NULL) | |
909 | delegation = &deleg_cur->stateid; | |
910 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
911 | goto no_delegation_unlock; | |
912 | ||
b7391f44 | 913 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 914 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
915 | ret = 1; |
916 | no_delegation_unlock: | |
917 | spin_unlock(&deleg_cur->lock); | |
918 | no_delegation: | |
919 | rcu_read_unlock(); | |
920 | ||
921 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 922 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
923 | ret = 1; |
924 | } | |
925 | ||
926 | return ret; | |
927 | } | |
928 | ||
929 | ||
dc0b027d | 930 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
931 | { |
932 | struct nfs_delegation *delegation; | |
933 | ||
934 | rcu_read_lock(); | |
935 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 936 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
937 | rcu_read_unlock(); |
938 | return; | |
939 | } | |
940 | rcu_read_unlock(); | |
941 | nfs_inode_return_delegation(inode); | |
942 | } | |
943 | ||
6ee41268 | 944 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
945 | { |
946 | struct nfs4_state *state = opendata->state; | |
947 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
948 | struct nfs_delegation *delegation; | |
dc0b027d TM |
949 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
950 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
951 | nfs4_stateid stateid; |
952 | int ret = -EAGAIN; | |
953 | ||
aac00a8d | 954 | for (;;) { |
dc0b027d | 955 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 956 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
957 | if (can_open_cached(state, fmode, open_mode)) { |
958 | update_open_stateflags(state, fmode); | |
6ee41268 | 959 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
960 | goto out_return_state; |
961 | } | |
962 | spin_unlock(&state->owner->so_lock); | |
963 | } | |
34310430 TM |
964 | rcu_read_lock(); |
965 | delegation = rcu_dereference(nfsi->delegation); | |
966 | if (delegation == NULL || | |
dc0b027d | 967 | !can_open_delegated(delegation, fmode)) { |
34310430 | 968 | rcu_read_unlock(); |
aac00a8d | 969 | break; |
34310430 | 970 | } |
aac00a8d TM |
971 | /* Save the delegation */ |
972 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
973 | rcu_read_unlock(); | |
af22f94a | 974 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
975 | if (ret != 0) |
976 | goto out; | |
977 | ret = -EAGAIN; | |
34310430 TM |
978 | |
979 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 980 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 981 | goto out_return_state; |
aac00a8d | 982 | } |
aac00a8d TM |
983 | out: |
984 | return ERR_PTR(ret); | |
985 | out_return_state: | |
986 | atomic_inc(&state->count); | |
987 | return state; | |
988 | } | |
989 | ||
24ac23ab TM |
990 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
991 | { | |
992 | struct inode *inode; | |
993 | struct nfs4_state *state = NULL; | |
003707c7 | 994 | struct nfs_delegation *delegation; |
1b370bc2 | 995 | int ret; |
24ac23ab | 996 | |
aac00a8d | 997 | if (!data->rpc_done) { |
6ee41268 | 998 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
999 | goto out; |
1000 | } | |
1001 | ||
1b370bc2 | 1002 | ret = -EAGAIN; |
24ac23ab | 1003 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 1004 | goto err; |
24ac23ab | 1005 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 1006 | ret = PTR_ERR(inode); |
03f28e3a | 1007 | if (IS_ERR(inode)) |
1b370bc2 TM |
1008 | goto err; |
1009 | ret = -ENOMEM; | |
24ac23ab TM |
1010 | state = nfs4_get_open_state(inode, data->owner); |
1011 | if (state == NULL) | |
1b370bc2 | 1012 | goto err_put_inode; |
549d6ed5 | 1013 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
1014 | int delegation_flags = 0; |
1015 | ||
003707c7 TM |
1016 | rcu_read_lock(); |
1017 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
1018 | if (delegation) | |
1019 | delegation_flags = delegation->flags; | |
1020 | rcu_read_unlock(); | |
15c831bf | 1021 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
1022 | nfs_inode_set_delegation(state->inode, |
1023 | data->owner->so_cred, | |
1024 | &data->o_res); | |
1025 | else | |
1026 | nfs_inode_reclaim_delegation(state->inode, | |
1027 | data->owner->so_cred, | |
1028 | &data->o_res); | |
1029 | } | |
34310430 TM |
1030 | |
1031 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 1032 | data->o_arg.fmode); |
24ac23ab | 1033 | iput(inode); |
aac00a8d | 1034 | out: |
24ac23ab | 1035 | return state; |
1b370bc2 TM |
1036 | err_put_inode: |
1037 | iput(inode); | |
1038 | err: | |
1039 | return ERR_PTR(ret); | |
24ac23ab TM |
1040 | } |
1041 | ||
864472e9 TM |
1042 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
1043 | { | |
1044 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
1045 | struct nfs_open_context *ctx; | |
1046 | ||
1047 | spin_lock(&state->inode->i_lock); | |
1048 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1049 | if (ctx->state != state) | |
1050 | continue; | |
1051 | get_nfs_open_context(ctx); | |
1052 | spin_unlock(&state->inode->i_lock); | |
1053 | return ctx; | |
1054 | } | |
1055 | spin_unlock(&state->inode->i_lock); | |
1056 | return ERR_PTR(-ENOENT); | |
1057 | } | |
1058 | ||
6f220ed5 TM |
1059 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
1060 | { | |
1061 | struct nfs4_opendata *opendata; | |
1062 | ||
dc0b027d | 1063 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
1064 | if (opendata == NULL) |
1065 | return ERR_PTR(-ENOMEM); | |
1066 | opendata->state = state; | |
1067 | atomic_inc(&state->count); | |
1068 | return opendata; | |
1069 | } | |
1070 | ||
dc0b027d | 1071 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 1072 | { |
2ced46c2 | 1073 | struct nfs4_state *newstate; |
864472e9 TM |
1074 | int ret; |
1075 | ||
dc0b027d TM |
1076 | opendata->o_arg.open_flags = 0; |
1077 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
1078 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
1079 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
1080 | nfs4_init_opendata_res(opendata); | |
b257957e | 1081 | ret = _nfs4_recover_proc_open(opendata); |
864472e9 TM |
1082 | if (ret != 0) |
1083 | return ret; | |
2ced46c2 | 1084 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1085 | if (IS_ERR(newstate)) |
1086 | return PTR_ERR(newstate); | |
dc0b027d | 1087 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 1088 | *res = newstate; |
864472e9 TM |
1089 | return 0; |
1090 | } | |
1091 | ||
1092 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1093 | { | |
864472e9 | 1094 | struct nfs4_state *newstate; |
864472e9 TM |
1095 | int ret; |
1096 | ||
1097 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1098 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1099 | smp_rmb(); |
1100 | if (state->n_rdwr != 0) { | |
2ced46c2 | 1101 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1102 | if (ret != 0) |
1103 | return ret; | |
2ced46c2 TM |
1104 | if (newstate != state) |
1105 | return -ESTALE; | |
864472e9 TM |
1106 | } |
1107 | if (state->n_wronly != 0) { | |
2ced46c2 | 1108 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1109 | if (ret != 0) |
1110 | return ret; | |
2ced46c2 TM |
1111 | if (newstate != state) |
1112 | return -ESTALE; | |
864472e9 TM |
1113 | } |
1114 | if (state->n_rdonly != 0) { | |
2ced46c2 | 1115 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1116 | if (ret != 0) |
1117 | return ret; | |
2ced46c2 TM |
1118 | if (newstate != state) |
1119 | return -ESTALE; | |
864472e9 | 1120 | } |
1ac7e2fd TM |
1121 | /* |
1122 | * We may have performed cached opens for all three recoveries. | |
1123 | * Check if we need to update the current stateid. | |
1124 | */ | |
1125 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1126 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1127 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1128 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1129 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1130 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1131 | } |
864472e9 TM |
1132 | return 0; |
1133 | } | |
1134 | ||
1da177e4 LT |
1135 | /* |
1136 | * OPEN_RECLAIM: | |
1137 | * reclaim state on the server after a reboot. | |
1da177e4 | 1138 | */ |
539cd03a | 1139 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1140 | { |
1ac7e2fd | 1141 | struct nfs_delegation *delegation; |
864472e9 | 1142 | struct nfs4_opendata *opendata; |
dc0b027d | 1143 | fmode_t delegation_type = 0; |
1da177e4 LT |
1144 | int status; |
1145 | ||
6f220ed5 TM |
1146 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1147 | if (IS_ERR(opendata)) | |
1148 | return PTR_ERR(opendata); | |
864472e9 TM |
1149 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1150 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1151 | rcu_read_lock(); |
1152 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1153 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1154 | delegation_type = delegation->type; |
1ac7e2fd | 1155 | rcu_read_unlock(); |
864472e9 TM |
1156 | opendata->o_arg.u.delegation_type = delegation_type; |
1157 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1158 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1159 | return status; |
1160 | } | |
1161 | ||
539cd03a | 1162 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1163 | { |
1164 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1165 | struct nfs4_exception exception = { }; | |
1166 | int err; | |
1167 | do { | |
539cd03a | 1168 | err = _nfs4_do_open_reclaim(ctx, state); |
2c643488 | 1169 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
1170 | break; |
1171 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1172 | } while (exception.retry); |
1173 | return err; | |
1174 | } | |
1175 | ||
864472e9 TM |
1176 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1177 | { | |
1178 | struct nfs_open_context *ctx; | |
1179 | int ret; | |
1180 | ||
1181 | ctx = nfs4_state_find_open_context(state); | |
1182 | if (IS_ERR(ctx)) | |
1183 | return PTR_ERR(ctx); | |
539cd03a | 1184 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1185 | put_nfs_open_context(ctx); |
1186 | return ret; | |
1187 | } | |
1188 | ||
13437e12 | 1189 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1190 | { |
e56e0b78 | 1191 | struct nfs4_opendata *opendata; |
864472e9 | 1192 | int ret; |
1da177e4 | 1193 | |
6f220ed5 TM |
1194 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1195 | if (IS_ERR(opendata)) | |
1196 | return PTR_ERR(opendata); | |
e56e0b78 | 1197 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1198 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1199 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1200 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1201 | nfs4_opendata_put(opendata); |
864472e9 | 1202 | return ret; |
1da177e4 LT |
1203 | } |
1204 | ||
13437e12 | 1205 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1206 | { |
1207 | struct nfs4_exception exception = { }; | |
539cd03a | 1208 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1209 | int err; |
1210 | do { | |
13437e12 | 1211 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1212 | switch (err) { |
1213 | case 0: | |
965b5d67 TM |
1214 | case -ENOENT: |
1215 | case -ESTALE: | |
1216 | goto out; | |
bcfa49f6 RL |
1217 | case -NFS4ERR_BADSESSION: |
1218 | case -NFS4ERR_BADSLOT: | |
1219 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1220 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1221 | case -NFS4ERR_DEADSESSION: | |
1222 | nfs4_schedule_state_recovery( | |
1223 | server->nfs_client); | |
1224 | goto out; | |
1da177e4 LT |
1225 | case -NFS4ERR_STALE_CLIENTID: |
1226 | case -NFS4ERR_STALE_STATEID: | |
1227 | case -NFS4ERR_EXPIRED: | |
1228 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1229 | nfs4_schedule_state_recovery(server->nfs_client); |
965b5d67 TM |
1230 | goto out; |
1231 | case -ERESTARTSYS: | |
1232 | /* | |
1233 | * The show must go on: exit, but mark the | |
1234 | * stateid as needing recovery. | |
1235 | */ | |
1236 | case -NFS4ERR_ADMIN_REVOKED: | |
1237 | case -NFS4ERR_BAD_STATEID: | |
1238 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
1239 | case -ENOMEM: | |
1240 | err = 0; | |
1241 | goto out; | |
1da177e4 LT |
1242 | } |
1243 | err = nfs4_handle_exception(server, err, &exception); | |
1244 | } while (exception.retry); | |
965b5d67 | 1245 | out: |
1da177e4 LT |
1246 | return err; |
1247 | } | |
1248 | ||
cdd4e68b TM |
1249 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1250 | { | |
1251 | struct nfs4_opendata *data = calldata; | |
1252 | ||
1253 | data->rpc_status = task->tk_status; | |
1254 | if (RPC_ASSASSINATED(task)) | |
1255 | return; | |
26e976a8 | 1256 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1257 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1258 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1259 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1260 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1261 | data->rpc_done = 1; |
26e976a8 | 1262 | } |
cdd4e68b TM |
1263 | } |
1264 | ||
1265 | static void nfs4_open_confirm_release(void *calldata) | |
1266 | { | |
1267 | struct nfs4_opendata *data = calldata; | |
1268 | struct nfs4_state *state = NULL; | |
1269 | ||
1270 | /* If this request hasn't been cancelled, do nothing */ | |
1271 | if (data->cancelled == 0) | |
1272 | goto out_free; | |
1273 | /* In case of error, no cleanup! */ | |
3e309914 | 1274 | if (!data->rpc_done) |
cdd4e68b | 1275 | goto out_free; |
cdd4e68b | 1276 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1277 | if (!IS_ERR(state)) |
dc0b027d | 1278 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1279 | out_free: |
c6d00e63 | 1280 | nfs4_opendata_put(data); |
cdd4e68b TM |
1281 | } |
1282 | ||
1283 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1284 | .rpc_call_done = nfs4_open_confirm_done, |
1285 | .rpc_release = nfs4_open_confirm_release, | |
1286 | }; | |
1287 | ||
1288 | /* | |
1289 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1290 | */ | |
1291 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1292 | { | |
1293 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1294 | struct rpc_task *task; | |
5138fde0 TM |
1295 | struct rpc_message msg = { |
1296 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1297 | .rpc_argp = &data->c_arg, | |
1298 | .rpc_resp = &data->c_res, | |
1299 | .rpc_cred = data->owner->so_cred, | |
1300 | }; | |
c970aa85 TM |
1301 | struct rpc_task_setup task_setup_data = { |
1302 | .rpc_client = server->client, | |
5138fde0 | 1303 | .rpc_message = &msg, |
c970aa85 TM |
1304 | .callback_ops = &nfs4_open_confirm_ops, |
1305 | .callback_data = data, | |
101070ca | 1306 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1307 | .flags = RPC_TASK_ASYNC, |
1308 | }; | |
1da177e4 LT |
1309 | int status; |
1310 | ||
c6d00e63 | 1311 | kref_get(&data->kref); |
3e309914 TM |
1312 | data->rpc_done = 0; |
1313 | data->rpc_status = 0; | |
5138fde0 | 1314 | data->timestamp = jiffies; |
c970aa85 | 1315 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1316 | if (IS_ERR(task)) |
cdd4e68b | 1317 | return PTR_ERR(task); |
cdd4e68b TM |
1318 | status = nfs4_wait_for_completion_rpc_task(task); |
1319 | if (status != 0) { | |
1320 | data->cancelled = 1; | |
1321 | smp_wmb(); | |
1322 | } else | |
1323 | status = data->rpc_status; | |
e6b3c4db | 1324 | rpc_put_task(task); |
1da177e4 LT |
1325 | return status; |
1326 | } | |
1327 | ||
24ac23ab | 1328 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1329 | { |
24ac23ab TM |
1330 | struct nfs4_opendata *data = calldata; |
1331 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1332 | |
24ac23ab TM |
1333 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1334 | return; | |
aac00a8d TM |
1335 | /* |
1336 | * Check if we still need to send an OPEN call, or if we can use | |
1337 | * a delegation instead. | |
1338 | */ | |
1339 | if (data->state != NULL) { | |
1340 | struct nfs_delegation *delegation; | |
1341 | ||
dc0b027d | 1342 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1343 | goto out_no_action; |
aac00a8d TM |
1344 | rcu_read_lock(); |
1345 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1346 | if (delegation != NULL && | |
15c831bf | 1347 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1348 | rcu_read_unlock(); |
6ee41268 | 1349 | goto out_no_action; |
aac00a8d TM |
1350 | } |
1351 | rcu_read_unlock(); | |
1352 | } | |
24ac23ab | 1353 | /* Update sequence id. */ |
9f958ab8 | 1354 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 1355 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 1356 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1357 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1358 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1359 | } | |
26e976a8 | 1360 | data->timestamp = jiffies; |
d898528c AA |
1361 | if (nfs4_setup_sequence(data->o_arg.server->nfs_client, |
1362 | &data->o_arg.seq_args, | |
1363 | &data->o_res.seq_res, 1, task)) | |
1364 | return; | |
5138fde0 | 1365 | rpc_call_start(task); |
6ee41268 TM |
1366 | return; |
1367 | out_no_action: | |
1368 | task->tk_action = NULL; | |
1369 | ||
24ac23ab | 1370 | } |
1da177e4 | 1371 | |
b257957e AB |
1372 | static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata) |
1373 | { | |
1374 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
1375 | nfs4_open_prepare(task, calldata); | |
1376 | } | |
1377 | ||
24ac23ab TM |
1378 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1379 | { | |
1380 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1381 | |
24ac23ab | 1382 | data->rpc_status = task->tk_status; |
d898528c | 1383 | |
d61e612a TM |
1384 | nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res, |
1385 | task->tk_status); | |
d898528c | 1386 | |
24ac23ab TM |
1387 | if (RPC_ASSASSINATED(task)) |
1388 | return; | |
1389 | if (task->tk_status == 0) { | |
1390 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1391 | case S_IFREG: |
1392 | break; | |
1393 | case S_IFLNK: | |
24ac23ab | 1394 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1395 | break; |
1396 | case S_IFDIR: | |
24ac23ab | 1397 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1398 | break; |
1399 | default: | |
24ac23ab | 1400 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1401 | } |
26e976a8 | 1402 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1403 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1404 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1405 | } |
3e309914 | 1406 | data->rpc_done = 1; |
24ac23ab | 1407 | } |
6f926b5b | 1408 | |
24ac23ab TM |
1409 | static void nfs4_open_release(void *calldata) |
1410 | { | |
1411 | struct nfs4_opendata *data = calldata; | |
1412 | struct nfs4_state *state = NULL; | |
1413 | ||
1414 | /* If this request hasn't been cancelled, do nothing */ | |
1415 | if (data->cancelled == 0) | |
1416 | goto out_free; | |
1417 | /* In case of error, no cleanup! */ | |
3e309914 | 1418 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1419 | goto out_free; |
1420 | /* In case we need an open_confirm, no cleanup! */ | |
1421 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1422 | goto out_free; | |
24ac23ab | 1423 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1424 | if (!IS_ERR(state)) |
dc0b027d | 1425 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1426 | out_free: |
c6d00e63 | 1427 | nfs4_opendata_put(data); |
24ac23ab TM |
1428 | } |
1429 | ||
1430 | static const struct rpc_call_ops nfs4_open_ops = { | |
1431 | .rpc_call_prepare = nfs4_open_prepare, | |
1432 | .rpc_call_done = nfs4_open_done, | |
1433 | .rpc_release = nfs4_open_release, | |
1434 | }; | |
1435 | ||
b257957e AB |
1436 | static const struct rpc_call_ops nfs4_recover_open_ops = { |
1437 | .rpc_call_prepare = nfs4_recover_open_prepare, | |
1438 | .rpc_call_done = nfs4_open_done, | |
1439 | .rpc_release = nfs4_open_release, | |
1440 | }; | |
1441 | ||
1442 | static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) | |
24ac23ab TM |
1443 | { |
1444 | struct inode *dir = data->dir->d_inode; | |
1445 | struct nfs_server *server = NFS_SERVER(dir); | |
1446 | struct nfs_openargs *o_arg = &data->o_arg; | |
1447 | struct nfs_openres *o_res = &data->o_res; | |
1448 | struct rpc_task *task; | |
5138fde0 TM |
1449 | struct rpc_message msg = { |
1450 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1451 | .rpc_argp = o_arg, | |
1452 | .rpc_resp = o_res, | |
1453 | .rpc_cred = data->owner->so_cred, | |
1454 | }; | |
c970aa85 TM |
1455 | struct rpc_task_setup task_setup_data = { |
1456 | .rpc_client = server->client, | |
5138fde0 | 1457 | .rpc_message = &msg, |
c970aa85 TM |
1458 | .callback_ops = &nfs4_open_ops, |
1459 | .callback_data = data, | |
101070ca | 1460 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1461 | .flags = RPC_TASK_ASYNC, |
1462 | }; | |
24ac23ab TM |
1463 | int status; |
1464 | ||
c6d00e63 | 1465 | kref_get(&data->kref); |
3e309914 TM |
1466 | data->rpc_done = 0; |
1467 | data->rpc_status = 0; | |
2ced46c2 | 1468 | data->cancelled = 0; |
b257957e AB |
1469 | if (isrecover) |
1470 | task_setup_data.callback_ops = &nfs4_recover_open_ops; | |
c970aa85 | 1471 | task = rpc_run_task(&task_setup_data); |
b257957e AB |
1472 | if (IS_ERR(task)) |
1473 | return PTR_ERR(task); | |
1474 | status = nfs4_wait_for_completion_rpc_task(task); | |
1475 | if (status != 0) { | |
1476 | data->cancelled = 1; | |
1477 | smp_wmb(); | |
1478 | } else | |
1479 | status = data->rpc_status; | |
1480 | rpc_put_task(task); | |
1481 | ||
1482 | return status; | |
1483 | } | |
1484 | ||
1485 | static int _nfs4_recover_proc_open(struct nfs4_opendata *data) | |
1486 | { | |
1487 | struct inode *dir = data->dir->d_inode; | |
1488 | struct nfs_openres *o_res = &data->o_res; | |
1489 | int status; | |
1490 | ||
1491 | status = nfs4_run_open_task(data, 1); | |
1492 | if (status != 0 || !data->rpc_done) | |
1493 | return status; | |
1494 | ||
1495 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1496 | ||
1497 | if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { | |
1498 | status = _nfs4_proc_open_confirm(data); | |
1499 | if (status != 0) | |
1500 | return status; | |
1501 | } | |
1502 | ||
1503 | return status; | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1508 | */ | |
1509 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1510 | { | |
1511 | struct inode *dir = data->dir->d_inode; | |
1512 | struct nfs_server *server = NFS_SERVER(dir); | |
1513 | struct nfs_openargs *o_arg = &data->o_arg; | |
1514 | struct nfs_openres *o_res = &data->o_res; | |
1515 | int status; | |
1516 | ||
1517 | status = nfs4_run_open_task(data, 0); | |
3e309914 | 1518 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1519 | return status; |
1520 | ||
56ae19f3 TM |
1521 | if (o_arg->open_flags & O_CREAT) { |
1522 | update_changeattr(dir, &o_res->cinfo); | |
1523 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1524 | } else | |
1525 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1526 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1527 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1528 | if (status != 0) |
24ac23ab | 1529 | return status; |
1da177e4 LT |
1530 | } |
1531 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1532 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1533 | return 0; |
1da177e4 LT |
1534 | } |
1535 | ||
10afec90 | 1536 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1537 | { |
7539bbab | 1538 | struct nfs_client *clp = server->nfs_client; |
a78cb57a | 1539 | unsigned int loop; |
6b30954e | 1540 | int ret; |
58d9714a | 1541 | |
a78cb57a | 1542 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { |
65de872e | 1543 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e | 1544 | if (ret != 0) |
a78cb57a | 1545 | break; |
e598d843 TM |
1546 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1547 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1548 | break; |
58d9714a | 1549 | nfs4_schedule_state_recovery(clp); |
a78cb57a | 1550 | ret = -EIO; |
6b30954e | 1551 | } |
a78cb57a | 1552 | return ret; |
58d9714a TM |
1553 | } |
1554 | ||
1da177e4 LT |
1555 | /* |
1556 | * OPEN_EXPIRED: | |
1557 | * reclaim state on the server after a network partition. | |
1558 | * Assumes caller holds the appropriate lock | |
1559 | */ | |
539cd03a | 1560 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1561 | { |
e56e0b78 | 1562 | struct nfs4_opendata *opendata; |
864472e9 | 1563 | int ret; |
1da177e4 | 1564 | |
6f220ed5 TM |
1565 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1566 | if (IS_ERR(opendata)) | |
1567 | return PTR_ERR(opendata); | |
864472e9 | 1568 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1569 | if (ret == -ESTALE) |
539cd03a | 1570 | d_drop(ctx->path.dentry); |
c6d00e63 | 1571 | nfs4_opendata_put(opendata); |
864472e9 | 1572 | return ret; |
1da177e4 LT |
1573 | } |
1574 | ||
a9ed2e25 | 1575 | static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1576 | { |
539cd03a | 1577 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1578 | struct nfs4_exception exception = { }; |
1579 | int err; | |
1580 | ||
1581 | do { | |
539cd03a | 1582 | err = _nfs4_open_expired(ctx, state); |
a9ed2e25 TM |
1583 | switch (err) { |
1584 | default: | |
1585 | goto out; | |
1586 | case -NFS4ERR_GRACE: | |
1587 | case -NFS4ERR_DELAY: | |
2c643488 | 1588 | case -EKEYEXPIRED: |
a9ed2e25 TM |
1589 | nfs4_handle_exception(server, err, &exception); |
1590 | err = 0; | |
1591 | } | |
202b50dc | 1592 | } while (exception.retry); |
a9ed2e25 | 1593 | out: |
202b50dc TM |
1594 | return err; |
1595 | } | |
1596 | ||
1da177e4 LT |
1597 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1598 | { | |
1da177e4 | 1599 | struct nfs_open_context *ctx; |
864472e9 | 1600 | int ret; |
1da177e4 | 1601 | |
864472e9 TM |
1602 | ctx = nfs4_state_find_open_context(state); |
1603 | if (IS_ERR(ctx)) | |
1604 | return PTR_ERR(ctx); | |
539cd03a | 1605 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1606 | put_nfs_open_context(ctx); |
1607 | return ret; | |
1da177e4 LT |
1608 | } |
1609 | ||
aa53ed54 JL |
1610 | /* |
1611 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1612 | * fields corresponding to attributes that were used to store the verifier. | |
1613 | * Make sure we clobber those fields in the later setattr call | |
1614 | */ | |
1615 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1616 | { | |
1617 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1618 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1619 | sattr->ia_valid |= ATTR_ATIME; | |
1620 | ||
1621 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1622 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1623 | sattr->ia_valid |= ATTR_MTIME; | |
1624 | } | |
1625 | ||
1da177e4 | 1626 | /* |
24ac23ab | 1627 | * Returns a referenced nfs4_state |
1da177e4 | 1628 | */ |
dc0b027d | 1629 | 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 |
1630 | { |
1631 | struct nfs4_state_owner *sp; | |
1632 | struct nfs4_state *state = NULL; | |
1633 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1634 | struct nfs4_opendata *opendata; |
aac00a8d | 1635 | int status; |
1da177e4 LT |
1636 | |
1637 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1638 | status = -ENOMEM; |
1639 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1640 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1641 | goto out_err; | |
1642 | } | |
58d9714a TM |
1643 | status = nfs4_recover_expired_lease(server); |
1644 | if (status != 0) | |
b4454fe1 | 1645 | goto err_put_state_owner; |
aac00a8d | 1646 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1647 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1648 | status = -ENOMEM; |
dc0b027d | 1649 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1650 | if (opendata == NULL) |
95d35cb4 | 1651 | goto err_put_state_owner; |
1da177e4 | 1652 | |
aac00a8d TM |
1653 | if (path->dentry->d_inode != NULL) |
1654 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1655 | ||
24ac23ab | 1656 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1657 | if (status != 0) |
c6d00e63 | 1658 | goto err_opendata_put; |
1da177e4 | 1659 | |
aa53ed54 JL |
1660 | if (opendata->o_arg.open_flags & O_EXCL) |
1661 | nfs4_exclusive_attrset(opendata, sattr); | |
1662 | ||
24ac23ab | 1663 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1664 | status = PTR_ERR(state); |
1665 | if (IS_ERR(state)) | |
c6d00e63 | 1666 | goto err_opendata_put; |
8e469ebd TM |
1667 | if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0) |
1668 | set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); | |
c6d00e63 | 1669 | nfs4_opendata_put(opendata); |
1da177e4 | 1670 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1671 | *res = state; |
1672 | return 0; | |
c6d00e63 TM |
1673 | err_opendata_put: |
1674 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1675 | err_put_state_owner: |
1676 | nfs4_put_state_owner(sp); | |
1da177e4 | 1677 | out_err: |
1da177e4 LT |
1678 | *res = NULL; |
1679 | return status; | |
1680 | } | |
1681 | ||
1682 | ||
dc0b027d | 1683 | 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 |
1684 | { |
1685 | struct nfs4_exception exception = { }; | |
1686 | struct nfs4_state *res; | |
1687 | int status; | |
1688 | ||
1689 | do { | |
dc0b027d | 1690 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1691 | if (status == 0) |
1692 | break; | |
1693 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1694 | * book-keeping w.r.t. state-changing operations | |
1695 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1696 | * It is actually a sign of a bug on the client or on the server. | |
1697 | * | |
1698 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1699 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1700 | * have unhashed the old state_owner for us, and that we can |
1701 | * therefore safely retry using a new one. We should still warn | |
1702 | * the user though... | |
1703 | */ | |
1704 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1705 | printk(KERN_WARNING "NFS: v4 server %s " |
1706 | " returned a bad sequence-id error!\n", | |
1707 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1708 | exception.retry = 1; |
1709 | continue; | |
1710 | } | |
550f5747 TM |
1711 | /* |
1712 | * BAD_STATEID on OPEN means that the server cancelled our | |
1713 | * state before it received the OPEN_CONFIRM. | |
1714 | * Recover by retrying the request as per the discussion | |
1715 | * on Page 181 of RFC3530. | |
1716 | */ | |
1717 | if (status == -NFS4ERR_BAD_STATEID) { | |
1718 | exception.retry = 1; | |
1719 | continue; | |
1720 | } | |
aac00a8d TM |
1721 | if (status == -EAGAIN) { |
1722 | /* We must have found a delegation */ | |
1723 | exception.retry = 1; | |
1724 | continue; | |
1725 | } | |
1da177e4 LT |
1726 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1727 | status, &exception)); | |
1728 | } while (exception.retry); | |
1729 | return res; | |
1730 | } | |
1731 | ||
659bfcd6 TM |
1732 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1733 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1734 | struct nfs4_state *state) | |
1da177e4 | 1735 | { |
3e4f6290 | 1736 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1737 | struct nfs_setattrargs arg = { |
3e4f6290 | 1738 | .fh = NFS_FH(inode), |
1da177e4 LT |
1739 | .iap = sattr, |
1740 | .server = server, | |
1741 | .bitmask = server->attr_bitmask, | |
1742 | }; | |
1743 | struct nfs_setattrres res = { | |
1744 | .fattr = fattr, | |
1745 | .server = server, | |
1746 | }; | |
1747 | struct rpc_message msg = { | |
659bfcd6 TM |
1748 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1749 | .rpc_argp = &arg, | |
1750 | .rpc_resp = &res, | |
1751 | .rpc_cred = cred, | |
1da177e4 | 1752 | }; |
26e976a8 | 1753 | unsigned long timestamp = jiffies; |
65e4308d | 1754 | int status; |
1da177e4 | 1755 | |
0e574af1 | 1756 | nfs_fattr_init(fattr); |
1da177e4 | 1757 | |
3e4f6290 TM |
1758 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1759 | /* Use that stateid */ | |
1760 | } else if (state != NULL) { | |
08e9eac4 TM |
1761 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1762 | } else | |
1da177e4 LT |
1763 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1764 | ||
cccef3b9 | 1765 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1766 | if (status == 0 && state != NULL) |
1767 | renew_lease(server, timestamp); | |
65e4308d | 1768 | return status; |
1da177e4 LT |
1769 | } |
1770 | ||
659bfcd6 TM |
1771 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1772 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1773 | struct nfs4_state *state) | |
1da177e4 | 1774 | { |
3e4f6290 | 1775 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1776 | struct nfs4_exception exception = { }; |
1777 | int err; | |
1778 | do { | |
1779 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1780 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1781 | &exception); |
1782 | } while (exception.retry); | |
1783 | return err; | |
1784 | } | |
1785 | ||
1786 | struct nfs4_closedata { | |
4a35bd41 | 1787 | struct path path; |
1da177e4 LT |
1788 | struct inode *inode; |
1789 | struct nfs4_state *state; | |
1790 | struct nfs_closeargs arg; | |
1791 | struct nfs_closeres res; | |
516a6af6 | 1792 | struct nfs_fattr fattr; |
26e976a8 | 1793 | unsigned long timestamp; |
1da177e4 LT |
1794 | }; |
1795 | ||
963d8fe5 | 1796 | static void nfs4_free_closedata(void *data) |
9512135d | 1797 | { |
963d8fe5 TM |
1798 | struct nfs4_closedata *calldata = data; |
1799 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1800 | |
1801 | nfs4_put_open_state(calldata->state); | |
1802 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1803 | nfs4_put_state_owner(sp); |
31f31db1 | 1804 | path_put(&calldata->path); |
9512135d TM |
1805 | kfree(calldata); |
1806 | } | |
1807 | ||
88069f77 TM |
1808 | static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, |
1809 | fmode_t fmode) | |
1810 | { | |
1811 | spin_lock(&state->owner->so_lock); | |
1812 | if (!(fmode & FMODE_READ)) | |
1813 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1814 | if (!(fmode & FMODE_WRITE)) | |
1815 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1816 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1817 | spin_unlock(&state->owner->so_lock); | |
1818 | } | |
1819 | ||
963d8fe5 | 1820 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1821 | { |
963d8fe5 | 1822 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1823 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1824 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1825 | ||
19ddab06 | 1826 | nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); |
4ce70ada TM |
1827 | if (RPC_ASSASSINATED(task)) |
1828 | return; | |
1da177e4 LT |
1829 | /* hmm. we are done with the inode, and in the process of freeing |
1830 | * the state_owner. we keep this around to process errors | |
1831 | */ | |
1da177e4 LT |
1832 | switch (task->tk_status) { |
1833 | case 0: | |
45328c35 | 1834 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1835 | renew_lease(server, calldata->timestamp); |
88069f77 TM |
1836 | nfs4_close_clear_stateid_flags(state, |
1837 | calldata->arg.fmode); | |
1da177e4 LT |
1838 | break; |
1839 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1840 | case -NFS4ERR_OLD_STATEID: |
1841 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1842 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1843 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1844 | break; |
1da177e4 | 1845 | default: |
72211dbe TM |
1846 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) |
1847 | rpc_restart_call_prepare(task); | |
1da177e4 | 1848 | } |
72211dbe | 1849 | nfs_release_seqid(calldata->arg.seqid); |
516a6af6 | 1850 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1851 | } |
1852 | ||
4ce70ada | 1853 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1854 | { |
4ce70ada | 1855 | struct nfs4_closedata *calldata = data; |
9512135d | 1856 | struct nfs4_state *state = calldata->state; |
88069f77 | 1857 | int call_close = 0; |
9512135d | 1858 | |
963d8fe5 | 1859 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1860 | return; |
003707c7 | 1861 | |
88069f77 TM |
1862 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
1863 | calldata->arg.fmode = FMODE_READ|FMODE_WRITE; | |
4cecb76f | 1864 | spin_lock(&state->owner->so_lock); |
003707c7 | 1865 | /* Calculate the change in open mode */ |
e7616923 | 1866 | if (state->n_rdwr == 0) { |
003707c7 | 1867 | if (state->n_rdonly == 0) { |
88069f77 TM |
1868 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
1869 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1870 | calldata->arg.fmode &= ~FMODE_READ; | |
003707c7 TM |
1871 | } |
1872 | if (state->n_wronly == 0) { | |
88069f77 TM |
1873 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
1874 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
1875 | calldata->arg.fmode &= ~FMODE_WRITE; | |
003707c7 | 1876 | } |
e7616923 | 1877 | } |
4cecb76f | 1878 | spin_unlock(&state->owner->so_lock); |
88069f77 TM |
1879 | |
1880 | if (!call_close) { | |
963d8fe5 TM |
1881 | /* Note: exit _without_ calling nfs4_close_done */ |
1882 | task->tk_action = NULL; | |
9512135d TM |
1883 | return; |
1884 | } | |
88069f77 TM |
1885 | |
1886 | if (calldata->arg.fmode == 0) | |
1887 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; | |
1888 | ||
516a6af6 | 1889 | nfs_fattr_init(calldata->res.fattr); |
26e976a8 | 1890 | calldata->timestamp = jiffies; |
19ddab06 AA |
1891 | if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client, |
1892 | &calldata->arg.seq_args, &calldata->res.seq_res, | |
1893 | 1, task)) | |
1894 | return; | |
5138fde0 | 1895 | rpc_call_start(task); |
1da177e4 LT |
1896 | } |
1897 | ||
963d8fe5 | 1898 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1899 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1900 | .rpc_call_done = nfs4_close_done, |
1901 | .rpc_release = nfs4_free_closedata, | |
1902 | }; | |
1903 | ||
1da177e4 LT |
1904 | /* |
1905 | * It is possible for data to be read/written from a mem-mapped file | |
1906 | * after the sys_close call (which hits the vfs layer as a flush). | |
1907 | * This means that we can't safely call nfsv4 close on a file until | |
1908 | * the inode is cleared. This in turn means that we are not good | |
1909 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1910 | * share state even when we are done with one of the three share | |
1911 | * stateid's in the inode. | |
1912 | * | |
1913 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1914 | */ | |
a49c3c77 | 1915 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1916 | { |
4a35bd41 | 1917 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1918 | struct nfs4_closedata *calldata; |
b39e625b TM |
1919 | struct nfs4_state_owner *sp = state->owner; |
1920 | struct rpc_task *task; | |
5138fde0 TM |
1921 | struct rpc_message msg = { |
1922 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1923 | .rpc_cred = state->owner->so_cred, | |
1924 | }; | |
c970aa85 TM |
1925 | struct rpc_task_setup task_setup_data = { |
1926 | .rpc_client = server->client, | |
5138fde0 | 1927 | .rpc_message = &msg, |
c970aa85 | 1928 | .callback_ops = &nfs4_close_ops, |
101070ca | 1929 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1930 | .flags = RPC_TASK_ASYNC, |
1931 | }; | |
9512135d | 1932 | int status = -ENOMEM; |
1da177e4 | 1933 | |
19ddab06 | 1934 | calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1935 | if (calldata == NULL) |
9512135d | 1936 | goto out; |
4a35bd41 | 1937 | calldata->inode = state->inode; |
1da177e4 | 1938 | calldata->state = state; |
4a35bd41 | 1939 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1940 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1941 | /* Serialization for the sequence id */ |
cee54fc9 | 1942 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1943 | if (calldata->arg.seqid == NULL) |
1944 | goto out_free_calldata; | |
dc0b027d | 1945 | calldata->arg.fmode = 0; |
a65318bf | 1946 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1947 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1948 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1949 | calldata->res.server = server; |
5f7dbd5c | 1950 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
f6948697 AV |
1951 | path_get(path); |
1952 | calldata->path = *path; | |
9512135d | 1953 | |
5138fde0 TM |
1954 | msg.rpc_argp = &calldata->arg, |
1955 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1956 | task_setup_data.callback_data = calldata; |
1957 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1958 | if (IS_ERR(task)) |
1959 | return PTR_ERR(task); | |
a49c3c77 TM |
1960 | status = 0; |
1961 | if (wait) | |
1962 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1963 | rpc_put_task(task); |
a49c3c77 | 1964 | return status; |
9512135d TM |
1965 | out_free_calldata: |
1966 | kfree(calldata); | |
1967 | out: | |
b39e625b TM |
1968 | nfs4_put_open_state(state); |
1969 | nfs4_put_state_owner(sp); | |
9512135d | 1970 | return status; |
1da177e4 LT |
1971 | } |
1972 | ||
dc0b027d | 1973 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1974 | { |
1975 | struct file *filp; | |
1b45c46c | 1976 | int ret; |
02a913a7 | 1977 | |
1b45c46c | 1978 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1979 | if (fmode & FMODE_EXEC) { |
af22f94a | 1980 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1981 | state->owner->so_cred, |
1982 | nd->intent.open.flags); | |
1983 | if (ret < 0) | |
1984 | goto out_close; | |
1985 | } | |
4a35bd41 | 1986 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1987 | if (!IS_ERR(filp)) { |
1988 | struct nfs_open_context *ctx; | |
cd3758e3 | 1989 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1990 | ctx->state = state; |
95cf959b TM |
1991 | return 0; |
1992 | } | |
1b45c46c TM |
1993 | ret = PTR_ERR(filp); |
1994 | out_close: | |
dc0b027d | 1995 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1996 | return ret; |
02a913a7 TM |
1997 | } |
1998 | ||
1999 | struct dentry * | |
1da177e4 LT |
2000 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
2001 | { | |
ad389da7 | 2002 | struct path path = { |
4ac91378 | 2003 | .mnt = nd->path.mnt, |
ad389da7 TM |
2004 | .dentry = dentry, |
2005 | }; | |
4ac91378 | 2006 | struct dentry *parent; |
1da177e4 LT |
2007 | struct iattr attr; |
2008 | struct rpc_cred *cred; | |
2009 | struct nfs4_state *state; | |
02a913a7 | 2010 | struct dentry *res; |
dc0b027d | 2011 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
2012 | |
2013 | if (nd->flags & LOOKUP_CREATE) { | |
2014 | attr.ia_mode = nd->intent.open.create_mode; | |
2015 | attr.ia_valid = ATTR_MODE; | |
2016 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 2017 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
2018 | } else { |
2019 | attr.ia_valid = 0; | |
2020 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
2021 | } | |
2022 | ||
98a8e323 | 2023 | cred = rpc_lookup_cred(); |
1da177e4 | 2024 | if (IS_ERR(cred)) |
02a913a7 | 2025 | return (struct dentry *)cred; |
565277f6 TM |
2026 | parent = dentry->d_parent; |
2027 | /* Protect against concurrent sillydeletes */ | |
2028 | nfs_block_sillyrename(parent); | |
dc0b027d | 2029 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 2030 | put_rpccred(cred); |
02a913a7 | 2031 | if (IS_ERR(state)) { |
d75340cc | 2032 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 2033 | d_add(dentry, NULL); |
d75340cc TM |
2034 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
2035 | } | |
565277f6 | 2036 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
2037 | return (struct dentry *)state; |
2038 | } | |
24ac23ab | 2039 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 2040 | if (res != NULL) |
deee9369 | 2041 | path.dentry = res; |
d75340cc | 2042 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 2043 | nfs_unblock_sillyrename(parent); |
dc0b027d | 2044 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2045 | return res; |
1da177e4 LT |
2046 | } |
2047 | ||
2048 | int | |
02a913a7 | 2049 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 2050 | { |
ad389da7 | 2051 | struct path path = { |
4ac91378 | 2052 | .mnt = nd->path.mnt, |
ad389da7 TM |
2053 | .dentry = dentry, |
2054 | }; | |
1da177e4 LT |
2055 | struct rpc_cred *cred; |
2056 | struct nfs4_state *state; | |
dc0b027d | 2057 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 2058 | |
98a8e323 | 2059 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2060 | if (IS_ERR(cred)) |
2061 | return PTR_ERR(cred); | |
dc0b027d | 2062 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 2063 | put_rpccred(cred); |
02a913a7 TM |
2064 | if (IS_ERR(state)) { |
2065 | switch (PTR_ERR(state)) { | |
2066 | case -EPERM: | |
2067 | case -EACCES: | |
2068 | case -EDQUOT: | |
2069 | case -ENOSPC: | |
2070 | case -EROFS: | |
2071 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
2072 | return 1; | |
b87c0adf CL |
2073 | default: |
2074 | goto out_drop; | |
02a913a7 | 2075 | } |
02a913a7 | 2076 | } |
24ac23ab | 2077 | if (state->inode == dentry->d_inode) { |
d75340cc | 2078 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 2079 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
2080 | return 1; |
2081 | } | |
dc0b027d | 2082 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
2083 | out_drop: |
2084 | d_drop(dentry); | |
1da177e4 LT |
2085 | return 0; |
2086 | } | |
2087 | ||
1185a552 | 2088 | static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
7fe5c398 TM |
2089 | { |
2090 | if (ctx->state == NULL) | |
2091 | return; | |
2092 | if (is_sync) | |
2093 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
2094 | else | |
2095 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
2096 | } | |
1da177e4 LT |
2097 | |
2098 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
2099 | { | |
43652ad5 BH |
2100 | struct nfs4_server_caps_arg args = { |
2101 | .fhandle = fhandle, | |
2102 | }; | |
1da177e4 LT |
2103 | struct nfs4_server_caps_res res = {}; |
2104 | struct rpc_message msg = { | |
2105 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 2106 | .rpc_argp = &args, |
1da177e4 LT |
2107 | .rpc_resp = &res, |
2108 | }; | |
2109 | int status; | |
2110 | ||
cccef3b9 | 2111 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2112 | if (status == 0) { |
2113 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
62ab460c TM |
2114 | server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| |
2115 | NFS_CAP_SYMLINKS|NFS_CAP_FILEID| | |
2116 | NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| | |
2117 | NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| | |
2118 | NFS_CAP_CTIME|NFS_CAP_MTIME); | |
1da177e4 LT |
2119 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) |
2120 | server->caps |= NFS_CAP_ACLS; | |
2121 | if (res.has_links != 0) | |
2122 | server->caps |= NFS_CAP_HARDLINKS; | |
2123 | if (res.has_symlinks != 0) | |
2124 | server->caps |= NFS_CAP_SYMLINKS; | |
62ab460c TM |
2125 | if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) |
2126 | server->caps |= NFS_CAP_FILEID; | |
2127 | if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) | |
2128 | server->caps |= NFS_CAP_MODE; | |
2129 | if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) | |
2130 | server->caps |= NFS_CAP_NLINK; | |
2131 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) | |
2132 | server->caps |= NFS_CAP_OWNER; | |
2133 | if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) | |
2134 | server->caps |= NFS_CAP_OWNER_GROUP; | |
2135 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) | |
2136 | server->caps |= NFS_CAP_ATIME; | |
2137 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) | |
2138 | server->caps |= NFS_CAP_CTIME; | |
2139 | if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) | |
2140 | server->caps |= NFS_CAP_MTIME; | |
2141 | ||
a65318bf TM |
2142 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
2143 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
2144 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
2145 | server->acl_bitmask = res.acl_bitmask; |
2146 | } | |
cccef3b9 | 2147 | |
1da177e4 LT |
2148 | return status; |
2149 | } | |
2150 | ||
55a97593 | 2151 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
2152 | { |
2153 | struct nfs4_exception exception = { }; | |
2154 | int err; | |
2155 | do { | |
2156 | err = nfs4_handle_exception(server, | |
2157 | _nfs4_server_capabilities(server, fhandle), | |
2158 | &exception); | |
2159 | } while (exception.retry); | |
2160 | return err; | |
2161 | } | |
2162 | ||
2163 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2164 | struct nfs_fsinfo *info) | |
2165 | { | |
1da177e4 LT |
2166 | struct nfs4_lookup_root_arg args = { |
2167 | .bitmask = nfs4_fattr_bitmap, | |
2168 | }; | |
2169 | struct nfs4_lookup_res res = { | |
2170 | .server = server, | |
0e574af1 | 2171 | .fattr = info->fattr, |
1da177e4 LT |
2172 | .fh = fhandle, |
2173 | }; | |
2174 | struct rpc_message msg = { | |
2175 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
2176 | .rpc_argp = &args, | |
2177 | .rpc_resp = &res, | |
2178 | }; | |
008f55d0 | 2179 | |
0e574af1 | 2180 | nfs_fattr_init(info->fattr); |
fccba804 | 2181 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2182 | } |
2183 | ||
2184 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
2185 | struct nfs_fsinfo *info) | |
2186 | { | |
2187 | struct nfs4_exception exception = { }; | |
2188 | int err; | |
2189 | do { | |
2190 | err = nfs4_handle_exception(server, | |
2191 | _nfs4_lookup_root(server, fhandle, info), | |
2192 | &exception); | |
2193 | } while (exception.retry); | |
2194 | return err; | |
2195 | } | |
2196 | ||
54ceac45 DH |
2197 | /* |
2198 | * get the file handle for the "/" directory on the server | |
2199 | */ | |
1da177e4 | 2200 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 2201 | struct nfs_fsinfo *info) |
1da177e4 | 2202 | { |
1da177e4 LT |
2203 | int status; |
2204 | ||
1da177e4 | 2205 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2206 | if (status == 0) |
2207 | status = nfs4_server_capabilities(server, fhandle); | |
2208 | if (status == 0) | |
2209 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2210 | return nfs4_map_errors(status); |
1da177e4 LT |
2211 | } |
2212 | ||
6b97fd3d MN |
2213 | /* |
2214 | * Get locations and (maybe) other attributes of a referral. | |
2215 | * Note that we'll actually follow the referral later when | |
2216 | * we detect fsid mismatch in inode revalidation | |
2217 | */ | |
56659e99 | 2218 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2219 | { |
2220 | int status = -ENOMEM; | |
2221 | struct page *page = NULL; | |
2222 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2223 | |
2224 | page = alloc_page(GFP_KERNEL); | |
2225 | if (page == NULL) | |
2226 | goto out; | |
2227 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2228 | if (locations == NULL) | |
2229 | goto out; | |
2230 | ||
c228fd3a | 2231 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2232 | if (status != 0) |
2233 | goto out; | |
2234 | /* Make sure server returned a different fsid for the referral */ | |
2235 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2236 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2237 | status = -EIO; |
2238 | goto out; | |
2239 | } | |
2240 | ||
2241 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2242 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2243 | if (!fattr->mode) | |
2244 | fattr->mode = S_IFDIR; | |
2245 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2246 | out: | |
2247 | if (page) | |
2248 | __free_page(page); | |
2249 | if (locations) | |
2250 | kfree(locations); | |
2251 | return status; | |
2252 | } | |
2253 | ||
1da177e4 LT |
2254 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2255 | { | |
2256 | struct nfs4_getattr_arg args = { | |
2257 | .fh = fhandle, | |
2258 | .bitmask = server->attr_bitmask, | |
2259 | }; | |
2260 | struct nfs4_getattr_res res = { | |
2261 | .fattr = fattr, | |
2262 | .server = server, | |
2263 | }; | |
2264 | struct rpc_message msg = { | |
2265 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2266 | .rpc_argp = &args, | |
2267 | .rpc_resp = &res, | |
2268 | }; | |
2269 | ||
0e574af1 | 2270 | nfs_fattr_init(fattr); |
cccef3b9 | 2271 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2272 | } |
2273 | ||
2274 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2275 | { | |
2276 | struct nfs4_exception exception = { }; | |
2277 | int err; | |
2278 | do { | |
2279 | err = nfs4_handle_exception(server, | |
2280 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2281 | &exception); | |
2282 | } while (exception.retry); | |
2283 | return err; | |
2284 | } | |
2285 | ||
2286 | /* | |
2287 | * The file is not closed if it is opened due to the a request to change | |
2288 | * the size of the file. The open call will not be needed once the | |
2289 | * VFS layer lookup-intents are implemented. | |
2290 | * | |
2291 | * Close is called when the inode is destroyed. | |
2292 | * If we haven't opened the file for O_WRONLY, we | |
2293 | * need to in the size_change case to obtain a stateid. | |
2294 | * | |
2295 | * Got race? | |
2296 | * Because OPEN is always done by name in nfsv4, it is | |
2297 | * possible that we opened a different file by the same | |
2298 | * name. We can recognize this race condition, but we | |
2299 | * can't do anything about it besides returning an error. | |
2300 | * | |
2301 | * This will be fixed with VFS changes (lookup-intent). | |
2302 | */ | |
2303 | static int | |
2304 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2305 | struct iattr *sattr) | |
2306 | { | |
08e9eac4 | 2307 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2308 | struct rpc_cred *cred = NULL; |
d530838b | 2309 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2310 | int status; |
2311 | ||
0e574af1 | 2312 | nfs_fattr_init(fattr); |
1da177e4 | 2313 | |
d530838b | 2314 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2315 | if (sattr->ia_valid & ATTR_FILE) { |
2316 | struct nfs_open_context *ctx; | |
2317 | ||
2318 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2319 | if (ctx) { |
2320 | cred = ctx->cred; | |
2321 | state = ctx->state; | |
2322 | } | |
659bfcd6 | 2323 | } |
08e9eac4 | 2324 | |
659bfcd6 | 2325 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2326 | if (status == 0) |
2327 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2328 | return status; |
2329 | } | |
2330 | ||
56659e99 TM |
2331 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2332 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2333 | struct nfs_fattr *fattr) |
2334 | { | |
2335 | int status; | |
2336 | struct nfs4_lookup_arg args = { | |
2337 | .bitmask = server->attr_bitmask, | |
2338 | .dir_fh = dirfh, | |
2339 | .name = name, | |
2340 | }; | |
2341 | struct nfs4_lookup_res res = { | |
2342 | .server = server, | |
2343 | .fattr = fattr, | |
2344 | .fh = fhandle, | |
2345 | }; | |
2346 | struct rpc_message msg = { | |
2347 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2348 | .rpc_argp = &args, | |
2349 | .rpc_resp = &res, | |
2350 | }; | |
2351 | ||
2352 | nfs_fattr_init(fattr); | |
2353 | ||
2354 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2355 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2356 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2357 | return status; |
2358 | } | |
2359 | ||
2360 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2361 | struct qstr *name, struct nfs_fh *fhandle, | |
2362 | struct nfs_fattr *fattr) | |
2363 | { | |
2364 | struct nfs4_exception exception = { }; | |
2365 | int err; | |
2366 | do { | |
4e56e082 TM |
2367 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2368 | /* FIXME: !!!! */ | |
2369 | if (err == -NFS4ERR_MOVED) { | |
2370 | err = -EREMOTE; | |
2371 | break; | |
2372 | } | |
2373 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2374 | } while (exception.retry); |
2375 | return err; | |
2376 | } | |
2377 | ||
56659e99 | 2378 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2379 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2380 | { | |
4e56e082 | 2381 | int status; |
1da177e4 LT |
2382 | |
2383 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2384 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2385 | if (status == -NFS4ERR_MOVED) |
2386 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2387 | dprintk("NFS reply lookup: %d\n", status); |
2388 | return status; | |
2389 | } | |
2390 | ||
2391 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2392 | { | |
2393 | struct nfs4_exception exception = { }; | |
2394 | int err; | |
2395 | do { | |
2396 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2397 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2398 | &exception); | |
2399 | } while (exception.retry); | |
2400 | return err; | |
2401 | } | |
2402 | ||
2403 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2404 | { | |
76b32999 TM |
2405 | struct nfs_server *server = NFS_SERVER(inode); |
2406 | struct nfs_fattr fattr; | |
1da177e4 LT |
2407 | struct nfs4_accessargs args = { |
2408 | .fh = NFS_FH(inode), | |
76b32999 TM |
2409 | .bitmask = server->attr_bitmask, |
2410 | }; | |
2411 | struct nfs4_accessres res = { | |
2412 | .server = server, | |
2413 | .fattr = &fattr, | |
1da177e4 | 2414 | }; |
1da177e4 LT |
2415 | struct rpc_message msg = { |
2416 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2417 | .rpc_argp = &args, | |
2418 | .rpc_resp = &res, | |
2419 | .rpc_cred = entry->cred, | |
2420 | }; | |
2421 | int mode = entry->mask; | |
2422 | int status; | |
2423 | ||
2424 | /* | |
2425 | * Determine which access bits we want to ask for... | |
2426 | */ | |
2427 | if (mode & MAY_READ) | |
2428 | args.access |= NFS4_ACCESS_READ; | |
2429 | if (S_ISDIR(inode->i_mode)) { | |
2430 | if (mode & MAY_WRITE) | |
2431 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2432 | if (mode & MAY_EXEC) | |
2433 | args.access |= NFS4_ACCESS_LOOKUP; | |
2434 | } else { | |
2435 | if (mode & MAY_WRITE) | |
2436 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2437 | if (mode & MAY_EXEC) | |
2438 | args.access |= NFS4_ACCESS_EXECUTE; | |
2439 | } | |
76b32999 | 2440 | nfs_fattr_init(&fattr); |
cccef3b9 | 2441 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2442 | if (!status) { |
2443 | entry->mask = 0; | |
2444 | if (res.access & NFS4_ACCESS_READ) | |
2445 | entry->mask |= MAY_READ; | |
2446 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2447 | entry->mask |= MAY_WRITE; | |
2448 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2449 | entry->mask |= MAY_EXEC; | |
76b32999 | 2450 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
2451 | } |
2452 | return status; | |
2453 | } | |
2454 | ||
2455 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2456 | { | |
2457 | struct nfs4_exception exception = { }; | |
2458 | int err; | |
2459 | do { | |
2460 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2461 | _nfs4_proc_access(inode, entry), | |
2462 | &exception); | |
2463 | } while (exception.retry); | |
2464 | return err; | |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * TODO: For the time being, we don't try to get any attributes | |
2469 | * along with any of the zero-copy operations READ, READDIR, | |
2470 | * READLINK, WRITE. | |
2471 | * | |
2472 | * In the case of the first three, we want to put the GETATTR | |
2473 | * after the read-type operation -- this is because it is hard | |
2474 | * to predict the length of a GETATTR response in v4, and thus | |
2475 | * align the READ data correctly. This means that the GETATTR | |
2476 | * may end up partially falling into the page cache, and we should | |
2477 | * shift it into the 'tail' of the xdr_buf before processing. | |
2478 | * To do this efficiently, we need to know the total length | |
2479 | * of data received, which doesn't seem to be available outside | |
2480 | * of the RPC layer. | |
2481 | * | |
2482 | * In the case of WRITE, we also want to put the GETATTR after | |
2483 | * the operation -- in this case because we want to make sure | |
2484 | * we get the post-operation mtime and size. This means that | |
2485 | * we can't use xdr_encode_pages() as written: we need a variant | |
2486 | * of it which would leave room in the 'tail' iovec. | |
2487 | * | |
2488 | * Both of these changes to the XDR layer would in fact be quite | |
2489 | * minor, but I decided to leave them for a subsequent patch. | |
2490 | */ | |
2491 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2492 | unsigned int pgbase, unsigned int pglen) | |
2493 | { | |
2494 | struct nfs4_readlink args = { | |
2495 | .fh = NFS_FH(inode), | |
2496 | .pgbase = pgbase, | |
2497 | .pglen = pglen, | |
2498 | .pages = &page, | |
2499 | }; | |
f50c7000 | 2500 | struct nfs4_readlink_res res; |
1da177e4 LT |
2501 | struct rpc_message msg = { |
2502 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2503 | .rpc_argp = &args, | |
f50c7000 | 2504 | .rpc_resp = &res, |
1da177e4 LT |
2505 | }; |
2506 | ||
cccef3b9 | 2507 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2508 | } |
2509 | ||
2510 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2511 | unsigned int pgbase, unsigned int pglen) | |
2512 | { | |
2513 | struct nfs4_exception exception = { }; | |
2514 | int err; | |
2515 | do { | |
2516 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2517 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2518 | &exception); | |
2519 | } while (exception.retry); | |
2520 | return err; | |
2521 | } | |
2522 | ||
1da177e4 LT |
2523 | /* |
2524 | * Got race? | |
2525 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2526 | * Until then, this create/open method is prone to inefficiency and race | |
2527 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2528 | * placed on the wire. | |
2529 | * | |
2530 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2531 | * The file will be opened again in the subsequent VFS open call | |
2532 | * (nfs4_proc_file_open). | |
2533 | * | |
2534 | * The open for read will just hang around to be used by any process that | |
2535 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2536 | */ | |
2537 | ||
2538 | static int | |
2539 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2540 | int flags, struct nameidata *nd) |
1da177e4 | 2541 | { |
ad389da7 | 2542 | struct path path = { |
4ac91378 | 2543 | .mnt = nd->path.mnt, |
ad389da7 TM |
2544 | .dentry = dentry, |
2545 | }; | |
1da177e4 LT |
2546 | struct nfs4_state *state; |
2547 | struct rpc_cred *cred; | |
dc0b027d | 2548 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2549 | int status = 0; |
2550 | ||
98a8e323 | 2551 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2552 | if (IS_ERR(cred)) { |
2553 | status = PTR_ERR(cred); | |
2554 | goto out; | |
2555 | } | |
dc0b027d | 2556 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2557 | d_drop(dentry); |
1da177e4 LT |
2558 | if (IS_ERR(state)) { |
2559 | status = PTR_ERR(state); | |
659bfcd6 | 2560 | goto out_putcred; |
1da177e4 | 2561 | } |
d4d9cdcb | 2562 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2563 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2564 | if (flags & O_EXCL) { |
2565 | struct nfs_fattr fattr; | |
659bfcd6 | 2566 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2567 | if (status == 0) |
65e4308d | 2568 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2569 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2570 | } |
ad389da7 | 2571 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2572 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2573 | else |
dc0b027d | 2574 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2575 | out_putcred: |
2576 | put_rpccred(cred); | |
1da177e4 LT |
2577 | out: |
2578 | return status; | |
2579 | } | |
2580 | ||
2581 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2582 | { | |
16e42959 | 2583 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2584 | struct nfs_removeargs args = { |
1da177e4 | 2585 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2586 | .name.len = name->len, |
2587 | .name.name = name->name, | |
16e42959 TM |
2588 | .bitmask = server->attr_bitmask, |
2589 | }; | |
4fdc17b2 | 2590 | struct nfs_removeres res = { |
16e42959 | 2591 | .server = server, |
1da177e4 | 2592 | }; |
1da177e4 | 2593 | struct rpc_message msg = { |
4fdc17b2 TM |
2594 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2595 | .rpc_argp = &args, | |
2596 | .rpc_resp = &res, | |
1da177e4 LT |
2597 | }; |
2598 | int status; | |
2599 | ||
4fdc17b2 | 2600 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2601 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2602 | if (status == 0) { |
2603 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2604 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2605 | } |
1da177e4 LT |
2606 | return status; |
2607 | } | |
2608 | ||
2609 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2610 | { | |
2611 | struct nfs4_exception exception = { }; | |
2612 | int err; | |
2613 | do { | |
2614 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2615 | _nfs4_proc_remove(dir, name), | |
2616 | &exception); | |
2617 | } while (exception.retry); | |
2618 | return err; | |
2619 | } | |
2620 | ||
e4eff1a6 | 2621 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2622 | { |
e4eff1a6 TM |
2623 | struct nfs_server *server = NFS_SERVER(dir); |
2624 | struct nfs_removeargs *args = msg->rpc_argp; | |
2625 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2626 | |
a65318bf | 2627 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2628 | res->server = server; |
1da177e4 | 2629 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2630 | } |
2631 | ||
e4eff1a6 | 2632 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2633 | { |
e4eff1a6 TM |
2634 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2635 | ||
472cfbd9 | 2636 | nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); |
9e33bed5 | 2637 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 TM |
2638 | return 0; |
2639 | update_changeattr(dir, &res->cinfo); | |
2640 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2641 | return 1; | |
1da177e4 LT |
2642 | } |
2643 | ||
2644 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2645 | struct inode *new_dir, struct qstr *new_name) | |
2646 | { | |
6caf2c82 | 2647 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2648 | struct nfs4_rename_arg arg = { |
2649 | .old_dir = NFS_FH(old_dir), | |
2650 | .new_dir = NFS_FH(new_dir), | |
2651 | .old_name = old_name, | |
2652 | .new_name = new_name, | |
6caf2c82 TM |
2653 | .bitmask = server->attr_bitmask, |
2654 | }; | |
2655 | struct nfs_fattr old_fattr, new_fattr; | |
2656 | struct nfs4_rename_res res = { | |
2657 | .server = server, | |
2658 | .old_fattr = &old_fattr, | |
2659 | .new_fattr = &new_fattr, | |
1da177e4 | 2660 | }; |
1da177e4 LT |
2661 | struct rpc_message msg = { |
2662 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2663 | .rpc_argp = &arg, | |
2664 | .rpc_resp = &res, | |
2665 | }; | |
2666 | int status; | |
2667 | ||
6caf2c82 TM |
2668 | nfs_fattr_init(res.old_fattr); |
2669 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2670 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2671 | |
2672 | if (!status) { | |
2673 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2674 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2675 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2676 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2677 | } |
2678 | return status; | |
2679 | } | |
2680 | ||
2681 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2682 | struct inode *new_dir, struct qstr *new_name) | |
2683 | { | |
2684 | struct nfs4_exception exception = { }; | |
2685 | int err; | |
2686 | do { | |
2687 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2688 | _nfs4_proc_rename(old_dir, old_name, | |
2689 | new_dir, new_name), | |
2690 | &exception); | |
2691 | } while (exception.retry); | |
2692 | return err; | |
2693 | } | |
2694 | ||
2695 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2696 | { | |
91ba2eee | 2697 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2698 | struct nfs4_link_arg arg = { |
2699 | .fh = NFS_FH(inode), | |
2700 | .dir_fh = NFS_FH(dir), | |
2701 | .name = name, | |
91ba2eee TM |
2702 | .bitmask = server->attr_bitmask, |
2703 | }; | |
2704 | struct nfs_fattr fattr, dir_attr; | |
2705 | struct nfs4_link_res res = { | |
2706 | .server = server, | |
2707 | .fattr = &fattr, | |
2708 | .dir_attr = &dir_attr, | |
1da177e4 | 2709 | }; |
1da177e4 LT |
2710 | struct rpc_message msg = { |
2711 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2712 | .rpc_argp = &arg, | |
91ba2eee | 2713 | .rpc_resp = &res, |
1da177e4 LT |
2714 | }; |
2715 | int status; | |
2716 | ||
91ba2eee TM |
2717 | nfs_fattr_init(res.fattr); |
2718 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2719 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2720 | if (!status) { |
2721 | update_changeattr(dir, &res.cinfo); | |
2722 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2723 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2724 | } |
1da177e4 LT |
2725 | |
2726 | return status; | |
2727 | } | |
2728 | ||
2729 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2730 | { | |
2731 | struct nfs4_exception exception = { }; | |
2732 | int err; | |
2733 | do { | |
2734 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2735 | _nfs4_proc_link(inode, dir, name), | |
2736 | &exception); | |
2737 | } while (exception.retry); | |
2738 | return err; | |
2739 | } | |
2740 | ||
57dc9a57 TM |
2741 | struct nfs4_createdata { |
2742 | struct rpc_message msg; | |
2743 | struct nfs4_create_arg arg; | |
2744 | struct nfs4_create_res res; | |
2745 | struct nfs_fh fh; | |
2746 | struct nfs_fattr fattr; | |
2747 | struct nfs_fattr dir_fattr; | |
2748 | }; | |
2749 | ||
2750 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2751 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2752 | { | |
2753 | struct nfs4_createdata *data; | |
2754 | ||
2755 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2756 | if (data != NULL) { | |
2757 | struct nfs_server *server = NFS_SERVER(dir); | |
2758 | ||
2759 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2760 | data->msg.rpc_argp = &data->arg; | |
2761 | data->msg.rpc_resp = &data->res; | |
2762 | data->arg.dir_fh = NFS_FH(dir); | |
2763 | data->arg.server = server; | |
2764 | data->arg.name = name; | |
2765 | data->arg.attrs = sattr; | |
2766 | data->arg.ftype = ftype; | |
2767 | data->arg.bitmask = server->attr_bitmask; | |
2768 | data->res.server = server; | |
2769 | data->res.fh = &data->fh; | |
2770 | data->res.fattr = &data->fattr; | |
2771 | data->res.dir_fattr = &data->dir_fattr; | |
2772 | nfs_fattr_init(data->res.fattr); | |
2773 | nfs_fattr_init(data->res.dir_fattr); | |
2774 | } | |
2775 | return data; | |
2776 | } | |
2777 | ||
2778 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2779 | { | |
cccef3b9 AA |
2780 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2781 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2782 | if (status == 0) { |
2783 | update_changeattr(dir, &data->res.dir_cinfo); | |
2784 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2785 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2786 | } | |
2787 | return status; | |
2788 | } | |
2789 | ||
2790 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2791 | { | |
2792 | kfree(data); | |
2793 | } | |
2794 | ||
4f390c15 | 2795 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2796 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2797 | { |
57dc9a57 TM |
2798 | struct nfs4_createdata *data; |
2799 | int status = -ENAMETOOLONG; | |
1da177e4 | 2800 | |
94a6d753 | 2801 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2802 | goto out; |
4f390c15 | 2803 | |
57dc9a57 TM |
2804 | status = -ENOMEM; |
2805 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2806 | if (data == NULL) | |
2807 | goto out; | |
2808 | ||
2809 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2810 | data->arg.u.symlink.pages = &page; | |
2811 | data->arg.u.symlink.len = len; | |
1da177e4 | 2812 | |
57dc9a57 TM |
2813 | status = nfs4_do_create(dir, dentry, data); |
2814 | ||
2815 | nfs4_free_createdata(data); | |
2816 | out: | |
1da177e4 LT |
2817 | return status; |
2818 | } | |
2819 | ||
4f390c15 | 2820 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2821 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2822 | { |
2823 | struct nfs4_exception exception = { }; | |
2824 | int err; | |
2825 | do { | |
2826 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2827 | _nfs4_proc_symlink(dir, dentry, page, |
2828 | len, sattr), | |
1da177e4 LT |
2829 | &exception); |
2830 | } while (exception.retry); | |
2831 | return err; | |
2832 | } | |
2833 | ||
2834 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2835 | struct iattr *sattr) | |
2836 | { | |
57dc9a57 TM |
2837 | struct nfs4_createdata *data; |
2838 | int status = -ENOMEM; | |
1da177e4 | 2839 | |
57dc9a57 TM |
2840 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2841 | if (data == NULL) | |
2842 | goto out; | |
2843 | ||
2844 | status = nfs4_do_create(dir, dentry, data); | |
2845 | ||
2846 | nfs4_free_createdata(data); | |
2847 | out: | |
1da177e4 LT |
2848 | return status; |
2849 | } | |
2850 | ||
2851 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2852 | struct iattr *sattr) | |
2853 | { | |
2854 | struct nfs4_exception exception = { }; | |
2855 | int err; | |
2856 | do { | |
2857 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2858 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2859 | &exception); | |
2860 | } while (exception.retry); | |
2861 | return err; | |
2862 | } | |
2863 | ||
2864 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2865 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2866 | { | |
2867 | struct inode *dir = dentry->d_inode; | |
2868 | struct nfs4_readdir_arg args = { | |
2869 | .fh = NFS_FH(dir), | |
2870 | .pages = &page, | |
2871 | .pgbase = 0, | |
2872 | .count = count, | |
96d25e53 | 2873 | .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, |
1da177e4 LT |
2874 | }; |
2875 | struct nfs4_readdir_res res; | |
2876 | struct rpc_message msg = { | |
2877 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2878 | .rpc_argp = &args, | |
2879 | .rpc_resp = &res, | |
2880 | .rpc_cred = cred, | |
2881 | }; | |
2882 | int status; | |
2883 | ||
3110ff80 | 2884 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2885 | dentry->d_parent->d_name.name, |
2886 | dentry->d_name.name, | |
2887 | (unsigned long long)cookie); | |
1da177e4 LT |
2888 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2889 | res.pgbase = args.pgbase; | |
cccef3b9 | 2890 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2891 | if (status == 0) |
2892 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2893 | |
2894 | nfs_invalidate_atime(dir); | |
2895 | ||
3110ff80 | 2896 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2897 | return status; |
2898 | } | |
2899 | ||
2900 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2901 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2902 | { | |
2903 | struct nfs4_exception exception = { }; | |
2904 | int err; | |
2905 | do { | |
2906 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2907 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2908 | page, count, plus), | |
2909 | &exception); | |
2910 | } while (exception.retry); | |
2911 | return err; | |
2912 | } | |
2913 | ||
2914 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2915 | struct iattr *sattr, dev_t rdev) | |
2916 | { | |
57dc9a57 TM |
2917 | struct nfs4_createdata *data; |
2918 | int mode = sattr->ia_mode; | |
2919 | int status = -ENOMEM; | |
1da177e4 LT |
2920 | |
2921 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2922 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2923 | |
2924 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2925 | if (data == NULL) | |
2926 | goto out; | |
2927 | ||
1da177e4 | 2928 | if (S_ISFIFO(mode)) |
57dc9a57 | 2929 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2930 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2931 | data->arg.ftype = NF4BLK; |
2932 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2933 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2934 | } |
2935 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2936 | data->arg.ftype = NF4CHR; |
2937 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2938 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2939 | } |
1da177e4 | 2940 | |
57dc9a57 TM |
2941 | status = nfs4_do_create(dir, dentry, data); |
2942 | ||
2943 | nfs4_free_createdata(data); | |
2944 | out: | |
1da177e4 LT |
2945 | return status; |
2946 | } | |
2947 | ||
2948 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2949 | struct iattr *sattr, dev_t rdev) | |
2950 | { | |
2951 | struct nfs4_exception exception = { }; | |
2952 | int err; | |
2953 | do { | |
2954 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2955 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2956 | &exception); | |
2957 | } while (exception.retry); | |
2958 | return err; | |
2959 | } | |
2960 | ||
2961 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2962 | struct nfs_fsstat *fsstat) | |
2963 | { | |
2964 | struct nfs4_statfs_arg args = { | |
2965 | .fh = fhandle, | |
2966 | .bitmask = server->attr_bitmask, | |
2967 | }; | |
24ad148a BH |
2968 | struct nfs4_statfs_res res = { |
2969 | .fsstat = fsstat, | |
2970 | }; | |
1da177e4 LT |
2971 | struct rpc_message msg = { |
2972 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2973 | .rpc_argp = &args, | |
24ad148a | 2974 | .rpc_resp = &res, |
1da177e4 LT |
2975 | }; |
2976 | ||
0e574af1 | 2977 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2978 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2979 | } |
2980 | ||
2981 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2982 | { | |
2983 | struct nfs4_exception exception = { }; | |
2984 | int err; | |
2985 | do { | |
2986 | err = nfs4_handle_exception(server, | |
2987 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2988 | &exception); | |
2989 | } while (exception.retry); | |
2990 | return err; | |
2991 | } | |
2992 | ||
2993 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2994 | struct nfs_fsinfo *fsinfo) | |
2995 | { | |
2996 | struct nfs4_fsinfo_arg args = { | |
2997 | .fh = fhandle, | |
2998 | .bitmask = server->attr_bitmask, | |
2999 | }; | |
3dda5e43 BH |
3000 | struct nfs4_fsinfo_res res = { |
3001 | .fsinfo = fsinfo, | |
3002 | }; | |
1da177e4 LT |
3003 | struct rpc_message msg = { |
3004 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
3005 | .rpc_argp = &args, | |
3dda5e43 | 3006 | .rpc_resp = &res, |
1da177e4 LT |
3007 | }; |
3008 | ||
cccef3b9 | 3009 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
3010 | } |
3011 | ||
3012 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3013 | { | |
3014 | struct nfs4_exception exception = { }; | |
3015 | int err; | |
3016 | ||
3017 | do { | |
3018 | err = nfs4_handle_exception(server, | |
3019 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
3020 | &exception); | |
3021 | } while (exception.retry); | |
3022 | return err; | |
3023 | } | |
3024 | ||
3025 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
3026 | { | |
0e574af1 | 3027 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
3028 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
3029 | } | |
3030 | ||
3031 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3032 | struct nfs_pathconf *pathconf) | |
3033 | { | |
3034 | struct nfs4_pathconf_arg args = { | |
3035 | .fh = fhandle, | |
3036 | .bitmask = server->attr_bitmask, | |
3037 | }; | |
d45b2989 BH |
3038 | struct nfs4_pathconf_res res = { |
3039 | .pathconf = pathconf, | |
3040 | }; | |
1da177e4 LT |
3041 | struct rpc_message msg = { |
3042 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
3043 | .rpc_argp = &args, | |
d45b2989 | 3044 | .rpc_resp = &res, |
1da177e4 LT |
3045 | }; |
3046 | ||
3047 | /* None of the pathconf attributes are mandatory to implement */ | |
3048 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
3049 | memset(pathconf, 0, sizeof(*pathconf)); | |
3050 | return 0; | |
3051 | } | |
3052 | ||
0e574af1 | 3053 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 3054 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
3055 | } |
3056 | ||
3057 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
3058 | struct nfs_pathconf *pathconf) | |
3059 | { | |
3060 | struct nfs4_exception exception = { }; | |
3061 | int err; | |
3062 | ||
3063 | do { | |
3064 | err = nfs4_handle_exception(server, | |
3065 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
3066 | &exception); | |
3067 | } while (exception.retry); | |
3068 | return err; | |
3069 | } | |
3070 | ||
ec06c096 | 3071 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 3072 | { |
ec06c096 | 3073 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3074 | |
f11c88af AA |
3075 | dprintk("--> %s\n", __func__); |
3076 | ||
f11c88af AA |
3077 | nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); |
3078 | ||
9e33bed5 | 3079 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
0110ee15 | 3080 | nfs_restart_rpc(task, server->nfs_client); |
ec06c096 | 3081 | return -EAGAIN; |
1da177e4 | 3082 | } |
8850df99 TM |
3083 | |
3084 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 3085 | if (task->tk_status > 0) |
ec06c096 TM |
3086 | renew_lease(server, data->timestamp); |
3087 | return 0; | |
1da177e4 LT |
3088 | } |
3089 | ||
bdc7f021 | 3090 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 3091 | { |
1da177e4 | 3092 | data->timestamp = jiffies; |
bdc7f021 | 3093 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
3094 | } |
3095 | ||
788e7a89 | 3096 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3097 | { |
1da177e4 LT |
3098 | struct inode *inode = data->inode; |
3099 | ||
def6ed7e AA |
3100 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
3101 | task->tk_status); | |
3102 | ||
9e33bed5 | 3103 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
0110ee15 | 3104 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3105 | return -EAGAIN; |
1da177e4 | 3106 | } |
4f9838c7 | 3107 | if (task->tk_status >= 0) { |
1da177e4 | 3108 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 3109 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 3110 | } |
788e7a89 | 3111 | return 0; |
1da177e4 LT |
3112 | } |
3113 | ||
bdc7f021 | 3114 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3115 | { |
bdc7f021 TM |
3116 | struct nfs_server *server = NFS_SERVER(data->inode); |
3117 | ||
a65318bf | 3118 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3119 | data->res.server = server; |
1da177e4 LT |
3120 | data->timestamp = jiffies; |
3121 | ||
bdc7f021 | 3122 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
3123 | } |
3124 | ||
788e7a89 | 3125 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 3126 | { |
1da177e4 LT |
3127 | struct inode *inode = data->inode; |
3128 | ||
21d9a851 AA |
3129 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
3130 | task->tk_status); | |
9e33bed5 | 3131 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
0110ee15 | 3132 | nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client); |
788e7a89 | 3133 | return -EAGAIN; |
1da177e4 | 3134 | } |
9e08a3c5 | 3135 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 3136 | return 0; |
1da177e4 LT |
3137 | } |
3138 | ||
bdc7f021 | 3139 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 3140 | { |
788e7a89 | 3141 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 3142 | |
a65318bf | 3143 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 3144 | data->res.server = server; |
bdc7f021 | 3145 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
3146 | } |
3147 | ||
3148 | /* | |
3149 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
3150 | * standalone procedure for queueing an asynchronous RENEW. | |
3151 | */ | |
dc96aef9 AB |
3152 | static void nfs4_renew_release(void *data) |
3153 | { | |
3154 | struct nfs_client *clp = data; | |
3155 | ||
0851de06 AB |
3156 | if (atomic_read(&clp->cl_count) > 1) |
3157 | nfs4_schedule_state_renewal(clp); | |
3158 | nfs_put_client(clp); | |
dc96aef9 AB |
3159 | } |
3160 | ||
963d8fe5 | 3161 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 3162 | { |
dc96aef9 AB |
3163 | struct nfs_client *clp = data; |
3164 | unsigned long timestamp = task->tk_start; | |
1da177e4 LT |
3165 | |
3166 | if (task->tk_status < 0) { | |
95baa25c TM |
3167 | /* Unless we're shutting down, schedule state recovery! */ |
3168 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
3169 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
3170 | return; |
3171 | } | |
3172 | spin_lock(&clp->cl_lock); | |
3173 | if (time_before(clp->cl_last_renewal,timestamp)) | |
3174 | clp->cl_last_renewal = timestamp; | |
3175 | spin_unlock(&clp->cl_lock); | |
3176 | } | |
3177 | ||
963d8fe5 TM |
3178 | static const struct rpc_call_ops nfs4_renew_ops = { |
3179 | .rpc_call_done = nfs4_renew_done, | |
dc96aef9 | 3180 | .rpc_release = nfs4_renew_release, |
963d8fe5 TM |
3181 | }; |
3182 | ||
adfa6f98 | 3183 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3184 | { |
3185 | struct rpc_message msg = { | |
3186 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3187 | .rpc_argp = clp, | |
b4454fe1 | 3188 | .rpc_cred = cred, |
1da177e4 LT |
3189 | }; |
3190 | ||
0851de06 AB |
3191 | if (!atomic_inc_not_zero(&clp->cl_count)) |
3192 | return -EIO; | |
1da177e4 | 3193 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, |
dc96aef9 | 3194 | &nfs4_renew_ops, clp); |
1da177e4 LT |
3195 | } |
3196 | ||
adfa6f98 | 3197 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3198 | { |
3199 | struct rpc_message msg = { | |
3200 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
3201 | .rpc_argp = clp, | |
b4454fe1 | 3202 | .rpc_cred = cred, |
1da177e4 LT |
3203 | }; |
3204 | unsigned long now = jiffies; | |
3205 | int status; | |
3206 | ||
3207 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3208 | if (status < 0) | |
3209 | return status; | |
3210 | spin_lock(&clp->cl_lock); | |
3211 | if (time_before(clp->cl_last_renewal,now)) | |
3212 | clp->cl_last_renewal = now; | |
3213 | spin_unlock(&clp->cl_lock); | |
3214 | return 0; | |
3215 | } | |
3216 | ||
aa1870af BF |
3217 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3218 | { | |
3219 | return (server->caps & NFS_CAP_ACLS) | |
3220 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3221 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3222 | } | |
3223 | ||
3224 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3225 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3226 | * the stack. | |
3227 | */ | |
3228 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3229 | ||
3230 | static void buf_to_pages(const void *buf, size_t buflen, | |
3231 | struct page **pages, unsigned int *pgbase) | |
3232 | { | |
3233 | const void *p = buf; | |
3234 | ||
3235 | *pgbase = offset_in_page(buf); | |
3236 | p -= *pgbase; | |
3237 | while (p < buf + buflen) { | |
3238 | *(pages++) = virt_to_page(p); | |
3239 | p += PAGE_CACHE_SIZE; | |
3240 | } | |
3241 | } | |
3242 | ||
e50a1c2e BF |
3243 | struct nfs4_cached_acl { |
3244 | int cached; | |
3245 | size_t len; | |
3e9d4154 | 3246 | char data[0]; |
e50a1c2e BF |
3247 | }; |
3248 | ||
3249 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3250 | { | |
3251 | struct nfs_inode *nfsi = NFS_I(inode); | |
3252 | ||
3253 | spin_lock(&inode->i_lock); | |
3254 | kfree(nfsi->nfs4_acl); | |
3255 | nfsi->nfs4_acl = acl; | |
3256 | spin_unlock(&inode->i_lock); | |
3257 | } | |
3258 | ||
3259 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3260 | { | |
3261 | nfs4_set_cached_acl(inode, NULL); | |
3262 | } | |
3263 | ||
3264 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3265 | { | |
3266 | struct nfs_inode *nfsi = NFS_I(inode); | |
3267 | struct nfs4_cached_acl *acl; | |
3268 | int ret = -ENOENT; | |
3269 | ||
3270 | spin_lock(&inode->i_lock); | |
3271 | acl = nfsi->nfs4_acl; | |
3272 | if (acl == NULL) | |
3273 | goto out; | |
3274 | if (buf == NULL) /* user is just asking for length */ | |
3275 | goto out_len; | |
3276 | if (acl->cached == 0) | |
3277 | goto out; | |
3278 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3279 | if (acl->len > buflen) | |
3280 | goto out; | |
3281 | memcpy(buf, acl->data, acl->len); | |
3282 | out_len: | |
3283 | ret = acl->len; | |
3284 | out: | |
3285 | spin_unlock(&inode->i_lock); | |
3286 | return ret; | |
3287 | } | |
3288 | ||
3289 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3290 | { | |
3291 | struct nfs4_cached_acl *acl; | |
3292 | ||
3293 | if (buf && acl_len <= PAGE_SIZE) { | |
3294 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3295 | if (acl == NULL) | |
3296 | goto out; | |
3297 | acl->cached = 1; | |
3298 | memcpy(acl->data, buf, acl_len); | |
3299 | } else { | |
3300 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3301 | if (acl == NULL) | |
3302 | goto out; | |
3303 | acl->cached = 0; | |
3304 | } | |
3305 | acl->len = acl_len; | |
3306 | out: | |
3307 | nfs4_set_cached_acl(inode, acl); | |
3308 | } | |
3309 | ||
16b4289c | 3310 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3311 | { |
aa1870af BF |
3312 | struct page *pages[NFS4ACL_MAXPAGES]; |
3313 | struct nfs_getaclargs args = { | |
3314 | .fh = NFS_FH(inode), | |
3315 | .acl_pages = pages, | |
3316 | .acl_len = buflen, | |
3317 | }; | |
663c79b3 BH |
3318 | struct nfs_getaclres res = { |
3319 | .acl_len = buflen, | |
3320 | }; | |
e50a1c2e | 3321 | void *resp_buf; |
aa1870af BF |
3322 | struct rpc_message msg = { |
3323 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3324 | .rpc_argp = &args, | |
663c79b3 | 3325 | .rpc_resp = &res, |
aa1870af | 3326 | }; |
e50a1c2e | 3327 | struct page *localpage = NULL; |
aa1870af BF |
3328 | int ret; |
3329 | ||
e50a1c2e BF |
3330 | if (buflen < PAGE_SIZE) { |
3331 | /* As long as we're doing a round trip to the server anyway, | |
3332 | * let's be prepared for a page of acl data. */ | |
3333 | localpage = alloc_page(GFP_KERNEL); | |
3334 | resp_buf = page_address(localpage); | |
3335 | if (localpage == NULL) | |
3336 | return -ENOMEM; | |
3337 | args.acl_pages[0] = localpage; | |
3338 | args.acl_pgbase = 0; | |
663c79b3 | 3339 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3340 | } else { |
3341 | resp_buf = buf; | |
3342 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3343 | } | |
cccef3b9 | 3344 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3345 | if (ret) |
3346 | goto out_free; | |
663c79b3 BH |
3347 | if (res.acl_len > args.acl_len) |
3348 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3349 | else |
663c79b3 | 3350 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3351 | if (buf) { |
3352 | ret = -ERANGE; | |
663c79b3 | 3353 | if (res.acl_len > buflen) |
e50a1c2e BF |
3354 | goto out_free; |
3355 | if (localpage) | |
663c79b3 | 3356 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3357 | } |
663c79b3 | 3358 | ret = res.acl_len; |
e50a1c2e BF |
3359 | out_free: |
3360 | if (localpage) | |
3361 | __free_page(localpage); | |
aa1870af BF |
3362 | return ret; |
3363 | } | |
3364 | ||
16b4289c TM |
3365 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3366 | { | |
3367 | struct nfs4_exception exception = { }; | |
3368 | ssize_t ret; | |
3369 | do { | |
3370 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3371 | if (ret >= 0) | |
3372 | break; | |
3373 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3374 | } while (exception.retry); | |
3375 | return ret; | |
3376 | } | |
3377 | ||
e50a1c2e BF |
3378 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3379 | { | |
3380 | struct nfs_server *server = NFS_SERVER(inode); | |
3381 | int ret; | |
3382 | ||
3383 | if (!nfs4_server_supports_acls(server)) | |
3384 | return -EOPNOTSUPP; | |
3385 | ret = nfs_revalidate_inode(server, inode); | |
3386 | if (ret < 0) | |
3387 | return ret; | |
3388 | ret = nfs4_read_cached_acl(inode, buf, buflen); | |
3389 | if (ret != -ENOENT) | |
3390 | return ret; | |
3391 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3392 | } | |
3393 | ||
16b4289c | 3394 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3395 | { |
3396 | struct nfs_server *server = NFS_SERVER(inode); | |
3397 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3398 | struct nfs_setaclargs arg = { | |
3399 | .fh = NFS_FH(inode), | |
3400 | .acl_pages = pages, | |
3401 | .acl_len = buflen, | |
3402 | }; | |
73c403a9 | 3403 | struct nfs_setaclres res; |
4b580ee3 BF |
3404 | struct rpc_message msg = { |
3405 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3406 | .rpc_argp = &arg, | |
73c403a9 | 3407 | .rpc_resp = &res, |
4b580ee3 BF |
3408 | }; |
3409 | int ret; | |
3410 | ||
3411 | if (!nfs4_server_supports_acls(server)) | |
3412 | return -EOPNOTSUPP; | |
642ac549 | 3413 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3414 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3415 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3416 | nfs_access_zap_cache(inode); |
3417 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3418 | return ret; |
3419 | } | |
3420 | ||
16b4289c TM |
3421 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3422 | { | |
3423 | struct nfs4_exception exception = { }; | |
3424 | int err; | |
3425 | do { | |
3426 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3427 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3428 | &exception); | |
3429 | } while (exception.retry); | |
3430 | return err; | |
3431 | } | |
3432 | ||
1da177e4 | 3433 | static int |
8328d59f | 3434 | _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state) |
1da177e4 | 3435 | { |
1da177e4 LT |
3436 | if (!clp || task->tk_status >= 0) |
3437 | return 0; | |
3438 | switch(task->tk_status) { | |
9e33bed5 TM |
3439 | case -NFS4ERR_ADMIN_REVOKED: |
3440 | case -NFS4ERR_BAD_STATEID: | |
3441 | case -NFS4ERR_OPENMODE: | |
3442 | if (state == NULL) | |
3443 | break; | |
3444 | nfs4_state_mark_reclaim_nograce(clp, state); | |
a2c0b9e2 | 3445 | goto do_state_recovery; |
1da177e4 | 3446 | case -NFS4ERR_STALE_STATEID: |
a2c0b9e2 TM |
3447 | if (state == NULL) |
3448 | break; | |
3449 | nfs4_state_mark_reclaim_reboot(clp, state); | |
3450 | case -NFS4ERR_STALE_CLIENTID: | |
1da177e4 | 3451 | case -NFS4ERR_EXPIRED: |
a2c0b9e2 | 3452 | goto do_state_recovery; |
4745e315 AA |
3453 | #if defined(CONFIG_NFS_V4_1) |
3454 | case -NFS4ERR_BADSESSION: | |
3455 | case -NFS4ERR_BADSLOT: | |
3456 | case -NFS4ERR_BAD_HIGH_SLOT: | |
3457 | case -NFS4ERR_DEADSESSION: | |
3458 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
3459 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
3460 | case -NFS4ERR_SEQ_MISORDERED: | |
3461 | dprintk("%s ERROR %d, Reset session\n", __func__, | |
3462 | task->tk_status); | |
0b9e2d41 | 3463 | nfs4_schedule_state_recovery(clp); |
4745e315 AA |
3464 | task->tk_status = 0; |
3465 | return -EAGAIN; | |
3466 | #endif /* CONFIG_NFS_V4_1 */ | |
1da177e4 | 3467 | case -NFS4ERR_DELAY: |
8328d59f AA |
3468 | if (server) |
3469 | nfs_inc_server_stats(server, NFSIOS_DELAY); | |
006ea73e | 3470 | case -NFS4ERR_GRACE: |
2c643488 | 3471 | case -EKEYEXPIRED: |
1da177e4 LT |
3472 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3473 | task->tk_status = 0; | |
3474 | return -EAGAIN; | |
3475 | case -NFS4ERR_OLD_STATEID: | |
3476 | task->tk_status = 0; | |
3477 | return -EAGAIN; | |
3478 | } | |
3479 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3480 | return 0; | |
a2c0b9e2 TM |
3481 | do_state_recovery: |
3482 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); | |
3483 | nfs4_schedule_state_recovery(clp); | |
3484 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) | |
3485 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); | |
3486 | task->tk_status = 0; | |
3487 | return -EAGAIN; | |
1da177e4 LT |
3488 | } |
3489 | ||
8328d59f AA |
3490 | static int |
3491 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) | |
3492 | { | |
3493 | return _nfs4_async_handle_error(task, server, server->nfs_client, state); | |
3494 | } | |
3495 | ||
adfa6f98 | 3496 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
3497 | { |
3498 | nfs4_verifier sc_verifier; | |
3499 | struct nfs4_setclientid setclientid = { | |
3500 | .sc_verifier = &sc_verifier, | |
3501 | .sc_prog = program, | |
3502 | }; | |
3503 | struct rpc_message msg = { | |
3504 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3505 | .rpc_argp = &setclientid, | |
3506 | .rpc_resp = clp, | |
286d7d6a | 3507 | .rpc_cred = cred, |
1da177e4 | 3508 | }; |
bc4785cd | 3509 | __be32 *p; |
1da177e4 LT |
3510 | int loop = 0; |
3511 | int status; | |
3512 | ||
bc4785cd | 3513 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3514 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3515 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3516 | ||
3517 | for(;;) { | |
3518 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3519 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3520 | clp->cl_ipaddr, |
3521 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3522 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3523 | rpc_peeraddr2str(clp->cl_rpcclient, |
3524 | RPC_DISPLAY_PROTO), | |
78ea323b | 3525 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3526 | clp->cl_id_uniquifier); |
3527 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3528 | sizeof(setclientid.sc_netid), |
3529 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3530 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3531 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3532 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3533 | clp->cl_ipaddr, port >> 8, port & 255); |
3534 | ||
3535 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3536 | if (status != -NFS4ERR_CLID_INUSE) | |
3537 | break; | |
3538 | if (signalled()) | |
3539 | break; | |
3540 | if (loop++ & 1) | |
3541 | ssleep(clp->cl_lease_time + 1); | |
3542 | else | |
3543 | if (++clp->cl_id_uniquifier == 0) | |
3544 | break; | |
3545 | } | |
3546 | return status; | |
3547 | } | |
3548 | ||
adfa6f98 | 3549 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3550 | { |
3551 | struct nfs_fsinfo fsinfo; | |
3552 | struct rpc_message msg = { | |
3553 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3554 | .rpc_argp = clp, | |
3555 | .rpc_resp = &fsinfo, | |
286d7d6a | 3556 | .rpc_cred = cred, |
1da177e4 LT |
3557 | }; |
3558 | unsigned long now; | |
3559 | int status; | |
3560 | ||
3561 | now = jiffies; | |
3562 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3563 | if (status == 0) { | |
3564 | spin_lock(&clp->cl_lock); | |
3565 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3566 | clp->cl_last_renewal = now; | |
3567 | spin_unlock(&clp->cl_lock); | |
3568 | } | |
3569 | return status; | |
3570 | } | |
3571 | ||
adfa6f98 | 3572 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3573 | { |
77e03677 | 3574 | long timeout = 0; |
51581f3b TM |
3575 | int err; |
3576 | do { | |
3577 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3578 | switch (err) { | |
3579 | case 0: | |
3580 | return err; | |
3581 | case -NFS4ERR_RESOURCE: | |
3582 | /* The IBM lawyers misread another document! */ | |
3583 | case -NFS4ERR_DELAY: | |
2c643488 | 3584 | case -EKEYEXPIRED: |
51581f3b TM |
3585 | err = nfs4_delay(clp->cl_rpcclient, &timeout); |
3586 | } | |
3587 | } while (err == 0); | |
3588 | return err; | |
3589 | } | |
3590 | ||
fe650407 TM |
3591 | struct nfs4_delegreturndata { |
3592 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3593 | struct nfs4_delegreturnres res; |
fe650407 TM |
3594 | struct nfs_fh fh; |
3595 | nfs4_stateid stateid; | |
26e976a8 | 3596 | unsigned long timestamp; |
fa178f29 | 3597 | struct nfs_fattr fattr; |
fe650407 TM |
3598 | int rpc_status; |
3599 | }; | |
3600 | ||
fe650407 TM |
3601 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3602 | { | |
3603 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 | 3604 | |
d61e612a TM |
3605 | nfs4_sequence_done(data->res.server, &data->res.seq_res, |
3606 | task->tk_status); | |
938e1010 | 3607 | |
79708861 RL |
3608 | switch (task->tk_status) { |
3609 | case -NFS4ERR_STALE_STATEID: | |
3610 | case -NFS4ERR_EXPIRED: | |
3611 | case 0: | |
fa178f29 | 3612 | renew_lease(data->res.server, data->timestamp); |
79708861 RL |
3613 | break; |
3614 | default: | |
3615 | if (nfs4_async_handle_error(task, data->res.server, NULL) == | |
3616 | -EAGAIN) { | |
3617 | nfs_restart_rpc(task, data->res.server->nfs_client); | |
3618 | return; | |
3619 | } | |
3620 | } | |
3621 | data->rpc_status = task->tk_status; | |
fe650407 TM |
3622 | } |
3623 | ||
3624 | static void nfs4_delegreturn_release(void *calldata) | |
3625 | { | |
fe650407 TM |
3626 | kfree(calldata); |
3627 | } | |
3628 | ||
938e1010 AA |
3629 | #if defined(CONFIG_NFS_V4_1) |
3630 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3631 | { | |
3632 | struct nfs4_delegreturndata *d_data; | |
3633 | ||
3634 | d_data = (struct nfs4_delegreturndata *)data; | |
3635 | ||
3636 | if (nfs4_setup_sequence(d_data->res.server->nfs_client, | |
3637 | &d_data->args.seq_args, | |
3638 | &d_data->res.seq_res, 1, task)) | |
3639 | return; | |
3640 | rpc_call_start(task); | |
3641 | } | |
3642 | #endif /* CONFIG_NFS_V4_1 */ | |
3643 | ||
c8d149f3 | 3644 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3645 | #if defined(CONFIG_NFS_V4_1) |
3646 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3647 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3648 | .rpc_call_done = nfs4_delegreturn_done, |
3649 | .rpc_release = nfs4_delegreturn_release, | |
3650 | }; | |
3651 | ||
e6f81075 | 3652 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3653 | { |
3654 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3655 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3656 | struct rpc_task *task; |
5138fde0 TM |
3657 | struct rpc_message msg = { |
3658 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3659 | .rpc_cred = cred, | |
3660 | }; | |
c970aa85 TM |
3661 | struct rpc_task_setup task_setup_data = { |
3662 | .rpc_client = server->client, | |
5138fde0 | 3663 | .rpc_message = &msg, |
c970aa85 TM |
3664 | .callback_ops = &nfs4_delegreturn_ops, |
3665 | .flags = RPC_TASK_ASYNC, | |
3666 | }; | |
e6f81075 | 3667 | int status = 0; |
fe650407 | 3668 | |
938e1010 | 3669 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
fe650407 TM |
3670 | if (data == NULL) |
3671 | return -ENOMEM; | |
3672 | data->args.fhandle = &data->fh; | |
3673 | data->args.stateid = &data->stateid; | |
fa178f29 | 3674 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3675 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3676 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3677 | data->res.fattr = &data->fattr; |
3678 | data->res.server = server; | |
5f7dbd5c | 3679 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3680 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3681 | data->timestamp = jiffies; |
fe650407 TM |
3682 | data->rpc_status = 0; |
3683 | ||
c970aa85 | 3684 | task_setup_data.callback_data = data; |
5138fde0 TM |
3685 | msg.rpc_argp = &data->args, |
3686 | msg.rpc_resp = &data->res, | |
c970aa85 | 3687 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3688 | if (IS_ERR(task)) |
fe650407 | 3689 | return PTR_ERR(task); |
e6f81075 TM |
3690 | if (!issync) |
3691 | goto out; | |
fe650407 | 3692 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3693 | if (status != 0) |
3694 | goto out; | |
3695 | status = data->rpc_status; | |
3696 | if (status != 0) | |
3697 | goto out; | |
3698 | nfs_refresh_inode(inode, &data->fattr); | |
3699 | out: | |
e6b3c4db | 3700 | rpc_put_task(task); |
fe650407 | 3701 | return status; |
1da177e4 LT |
3702 | } |
3703 | ||
e6f81075 | 3704 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3705 | { |
3706 | struct nfs_server *server = NFS_SERVER(inode); | |
3707 | struct nfs4_exception exception = { }; | |
3708 | int err; | |
3709 | do { | |
e6f81075 | 3710 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3711 | switch (err) { |
3712 | case -NFS4ERR_STALE_STATEID: | |
3713 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3714 | case 0: |
3715 | return 0; | |
3716 | } | |
3717 | err = nfs4_handle_exception(server, err, &exception); | |
3718 | } while (exception.retry); | |
3719 | return err; | |
3720 | } | |
3721 | ||
3722 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3723 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3724 | ||
3725 | /* | |
3726 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3727 | */ | |
3728 | static unsigned long | |
3729 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3730 | { | |
150030b7 | 3731 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3732 | timeout <<= 1; |
3733 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3734 | return NFS4_LOCK_MAXTIMEOUT; | |
3735 | return timeout; | |
3736 | } | |
3737 | ||
1da177e4 LT |
3738 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3739 | { | |
3740 | struct inode *inode = state->inode; | |
3741 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3742 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3743 | struct nfs_lockt_args arg = { |
1da177e4 | 3744 | .fh = NFS_FH(inode), |
911d1aaf | 3745 | .fl = request, |
1da177e4 | 3746 | }; |
911d1aaf TM |
3747 | struct nfs_lockt_res res = { |
3748 | .denied = request, | |
1da177e4 LT |
3749 | }; |
3750 | struct rpc_message msg = { | |
3751 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3752 | .rpc_argp = &arg, | |
3753 | .rpc_resp = &res, | |
3754 | .rpc_cred = state->owner->so_cred, | |
3755 | }; | |
1da177e4 LT |
3756 | struct nfs4_lock_state *lsp; |
3757 | int status; | |
3758 | ||
911d1aaf | 3759 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3760 | status = nfs4_set_lock_state(state, request); |
3761 | if (status != 0) | |
3762 | goto out; | |
3763 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3764 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3765 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3766 | switch (status) { |
3767 | case 0: | |
3768 | request->fl_type = F_UNLCK; | |
3769 | break; | |
3770 | case -NFS4ERR_DENIED: | |
3771 | status = 0; | |
1da177e4 | 3772 | } |
70cc6487 | 3773 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3774 | out: |
1da177e4 LT |
3775 | return status; |
3776 | } | |
3777 | ||
3778 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3779 | { | |
3780 | struct nfs4_exception exception = { }; | |
3781 | int err; | |
3782 | ||
3783 | do { | |
3784 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3785 | _nfs4_proc_getlk(state, cmd, request), | |
3786 | &exception); | |
3787 | } while (exception.retry); | |
3788 | return err; | |
3789 | } | |
3790 | ||
3791 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3792 | { | |
3793 | int res = 0; | |
3794 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3795 | case FL_POSIX: | |
3796 | res = posix_lock_file_wait(file, fl); | |
3797 | break; | |
3798 | case FL_FLOCK: | |
3799 | res = flock_lock_file_wait(file, fl); | |
3800 | break; | |
3801 | default: | |
3802 | BUG(); | |
3803 | } | |
1da177e4 LT |
3804 | return res; |
3805 | } | |
3806 | ||
faf5f49c | 3807 | struct nfs4_unlockdata { |
911d1aaf TM |
3808 | struct nfs_locku_args arg; |
3809 | struct nfs_locku_res res; | |
faf5f49c TM |
3810 | struct nfs4_lock_state *lsp; |
3811 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3812 | struct file_lock fl; |
3813 | const struct nfs_server *server; | |
26e976a8 | 3814 | unsigned long timestamp; |
faf5f49c TM |
3815 | }; |
3816 | ||
911d1aaf TM |
3817 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3818 | struct nfs_open_context *ctx, | |
3819 | struct nfs4_lock_state *lsp, | |
3820 | struct nfs_seqid *seqid) | |
3821 | { | |
3822 | struct nfs4_unlockdata *p; | |
3823 | struct inode *inode = lsp->ls_state->inode; | |
3824 | ||
a893693c | 3825 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
911d1aaf TM |
3826 | if (p == NULL) |
3827 | return NULL; | |
3828 | p->arg.fh = NFS_FH(inode); | |
3829 | p->arg.fl = &p->fl; | |
3830 | p->arg.seqid = seqid; | |
c1d51931 | 3831 | p->res.seqid = seqid; |
5f7dbd5c | 3832 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3833 | p->arg.stateid = &lsp->ls_stateid; |
3834 | p->lsp = lsp; | |
3835 | atomic_inc(&lsp->ls_count); | |
3836 | /* Ensure we don't close file until we're done freeing locks! */ | |
3837 | p->ctx = get_nfs_open_context(ctx); | |
3838 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3839 | p->server = NFS_SERVER(inode); | |
3840 | return p; | |
3841 | } | |
3842 | ||
06f814a3 | 3843 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3844 | { |
963d8fe5 | 3845 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3846 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3847 | nfs4_put_lock_state(calldata->lsp); |
3848 | put_nfs_open_context(calldata->ctx); | |
3849 | kfree(calldata); | |
faf5f49c TM |
3850 | } |
3851 | ||
963d8fe5 | 3852 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3853 | { |
963d8fe5 | 3854 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3855 | |
a893693c AA |
3856 | nfs4_sequence_done(calldata->server, &calldata->res.seq_res, |
3857 | task->tk_status); | |
06f814a3 TM |
3858 | if (RPC_ASSASSINATED(task)) |
3859 | return; | |
faf5f49c TM |
3860 | switch (task->tk_status) { |
3861 | case 0: | |
3862 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3863 | calldata->res.stateid.data, |
faf5f49c | 3864 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3865 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3866 | break; |
9e33bed5 TM |
3867 | case -NFS4ERR_BAD_STATEID: |
3868 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3869 | case -NFS4ERR_STALE_STATEID: |
3870 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3871 | break; |
3872 | default: | |
9e33bed5 | 3873 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
0110ee15 | 3874 | nfs_restart_rpc(task, |
d61e612a | 3875 | calldata->server->nfs_client); |
faf5f49c | 3876 | } |
faf5f49c TM |
3877 | } |
3878 | ||
4ce70ada | 3879 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3880 | { |
4ce70ada | 3881 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3882 | |
911d1aaf | 3883 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3884 | return; |
3885 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3886 | /* Note: exit _without_ running nfs4_locku_done */ |
3887 | task->tk_action = NULL; | |
faf5f49c TM |
3888 | return; |
3889 | } | |
26e976a8 | 3890 | calldata->timestamp = jiffies; |
a893693c AA |
3891 | if (nfs4_setup_sequence(calldata->server->nfs_client, |
3892 | &calldata->arg.seq_args, | |
3893 | &calldata->res.seq_res, 1, task)) | |
3894 | return; | |
5138fde0 | 3895 | rpc_call_start(task); |
faf5f49c TM |
3896 | } |
3897 | ||
963d8fe5 | 3898 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3899 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3900 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3901 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3902 | }; |
3903 | ||
a5d16a4d TM |
3904 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3905 | struct nfs_open_context *ctx, | |
3906 | struct nfs4_lock_state *lsp, | |
3907 | struct nfs_seqid *seqid) | |
3908 | { | |
3909 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3910 | struct rpc_message msg = { |
3911 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3912 | .rpc_cred = ctx->cred, | |
3913 | }; | |
c970aa85 TM |
3914 | struct rpc_task_setup task_setup_data = { |
3915 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3916 | .rpc_message = &msg, |
c970aa85 | 3917 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3918 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3919 | .flags = RPC_TASK_ASYNC, |
3920 | }; | |
a5d16a4d | 3921 | |
137d6aca FF |
3922 | /* Ensure this is an unlock - when canceling a lock, the |
3923 | * canceled lock is passed in, and it won't be an unlock. | |
3924 | */ | |
3925 | fl->fl_type = F_UNLCK; | |
3926 | ||
a5d16a4d TM |
3927 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3928 | if (data == NULL) { | |
3929 | nfs_free_seqid(seqid); | |
3930 | return ERR_PTR(-ENOMEM); | |
3931 | } | |
3932 | ||
5138fde0 TM |
3933 | msg.rpc_argp = &data->arg, |
3934 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3935 | task_setup_data.callback_data = data; |
3936 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3937 | } |
3938 | ||
faf5f49c TM |
3939 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3940 | { | |
19e03c57 | 3941 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3942 | struct nfs_seqid *seqid; |
1da177e4 | 3943 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3944 | struct rpc_task *task; |
3945 | int status = 0; | |
536ff0f8 | 3946 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3947 | |
8d0a8a9d | 3948 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3949 | /* Unlock _before_ we do the RPC call */ |
3950 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3951 | down_read(&nfsi->rwsem); |
3952 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3953 | up_read(&nfsi->rwsem); | |
9b073574 | 3954 | goto out; |
19e03c57 TM |
3955 | } |
3956 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3957 | if (status != 0) |
9b073574 TM |
3958 | goto out; |
3959 | /* Is this a delegated lock? */ | |
3960 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3961 | goto out; | |
8d0a8a9d | 3962 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3963 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3964 | status = -ENOMEM; |
911d1aaf | 3965 | if (seqid == NULL) |
9b073574 | 3966 | goto out; |
cd3758e3 | 3967 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3968 | status = PTR_ERR(task); |
3969 | if (IS_ERR(task)) | |
9b073574 | 3970 | goto out; |
a5d16a4d | 3971 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3972 | rpc_put_task(task); |
9b073574 | 3973 | out: |
536ff0f8 | 3974 | request->fl_flags = fl_flags; |
1da177e4 LT |
3975 | return status; |
3976 | } | |
3977 | ||
a5d16a4d TM |
3978 | struct nfs4_lockdata { |
3979 | struct nfs_lock_args arg; | |
3980 | struct nfs_lock_res res; | |
3981 | struct nfs4_lock_state *lsp; | |
3982 | struct nfs_open_context *ctx; | |
3983 | struct file_lock fl; | |
26e976a8 | 3984 | unsigned long timestamp; |
a5d16a4d TM |
3985 | int rpc_status; |
3986 | int cancelled; | |
66179efe | 3987 | struct nfs_server *server; |
a5d16a4d TM |
3988 | }; |
3989 | ||
3990 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3991 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3992 | { |
a5d16a4d TM |
3993 | struct nfs4_lockdata *p; |
3994 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3995 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3996 | |
3997 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3998 | if (p == NULL) | |
3999 | return NULL; | |
4000 | ||
4001 | p->arg.fh = NFS_FH(inode); | |
4002 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
4003 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
4004 | if (p->arg.open_seqid == NULL) | |
4005 | goto out_free; | |
a5d16a4d TM |
4006 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
4007 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 4008 | goto out_free_seqid; |
a5d16a4d | 4009 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 4010 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 4011 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 4012 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 4013 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d | 4014 | p->lsp = lsp; |
66179efe | 4015 | p->server = server; |
a5d16a4d TM |
4016 | atomic_inc(&lsp->ls_count); |
4017 | p->ctx = get_nfs_open_context(ctx); | |
4018 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
4019 | return p; | |
2f74c0a0 TM |
4020 | out_free_seqid: |
4021 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
4022 | out_free: |
4023 | kfree(p); | |
4024 | return NULL; | |
4025 | } | |
4026 | ||
4027 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
4028 | { | |
4029 | struct nfs4_lockdata *data = calldata; | |
4030 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 4031 | |
3110ff80 | 4032 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
4033 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
4034 | return; | |
a5d16a4d TM |
4035 | /* Do we need to do an open_to_lock_owner? */ |
4036 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
4037 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
4038 | return; | |
a5d16a4d TM |
4039 | data->arg.open_stateid = &state->stateid; |
4040 | data->arg.new_lock_owner = 1; | |
c1d51931 | 4041 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
4042 | } else |
4043 | data->arg.new_lock_owner = 0; | |
26e976a8 | 4044 | data->timestamp = jiffies; |
66179efe AA |
4045 | if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, |
4046 | &data->res.seq_res, 1, task)) | |
4047 | return; | |
5138fde0 | 4048 | rpc_call_start(task); |
3110ff80 | 4049 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
4050 | } |
4051 | ||
b257957e AB |
4052 | static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata) |
4053 | { | |
4054 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
4055 | nfs4_lock_prepare(task, calldata); | |
4056 | } | |
4057 | ||
a5d16a4d TM |
4058 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) |
4059 | { | |
4060 | struct nfs4_lockdata *data = calldata; | |
4061 | ||
3110ff80 | 4062 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 4063 | |
d61e612a TM |
4064 | nfs4_sequence_done(data->server, &data->res.seq_res, |
4065 | task->tk_status); | |
66179efe | 4066 | |
a5d16a4d TM |
4067 | data->rpc_status = task->tk_status; |
4068 | if (RPC_ASSASSINATED(task)) | |
4069 | goto out; | |
4070 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
4071 | if (data->rpc_status == 0) |
4072 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
4073 | else | |
4074 | goto out; | |
4075 | } | |
4076 | if (data->rpc_status == 0) { | |
4077 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
4078 | sizeof(data->lsp->ls_stateid.data)); | |
4079 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 4080 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 4081 | } |
a5d16a4d | 4082 | out: |
3110ff80 | 4083 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
4084 | } |
4085 | ||
4086 | static void nfs4_lock_release(void *calldata) | |
4087 | { | |
4088 | struct nfs4_lockdata *data = calldata; | |
4089 | ||
3110ff80 | 4090 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 4091 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
4092 | if (data->cancelled != 0) { |
4093 | struct rpc_task *task; | |
4094 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
4095 | data->arg.lock_seqid); | |
4096 | if (!IS_ERR(task)) | |
e6b3c4db | 4097 | rpc_put_task(task); |
3110ff80 | 4098 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
4099 | } else |
4100 | nfs_free_seqid(data->arg.lock_seqid); | |
4101 | nfs4_put_lock_state(data->lsp); | |
4102 | put_nfs_open_context(data->ctx); | |
4103 | kfree(data); | |
3110ff80 | 4104 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
4105 | } |
4106 | ||
4107 | static const struct rpc_call_ops nfs4_lock_ops = { | |
4108 | .rpc_call_prepare = nfs4_lock_prepare, | |
4109 | .rpc_call_done = nfs4_lock_done, | |
4110 | .rpc_release = nfs4_lock_release, | |
4111 | }; | |
4112 | ||
b257957e AB |
4113 | static const struct rpc_call_ops nfs4_recover_lock_ops = { |
4114 | .rpc_call_prepare = nfs4_recover_lock_prepare, | |
4115 | .rpc_call_done = nfs4_lock_done, | |
4116 | .rpc_release = nfs4_lock_release, | |
4117 | }; | |
4118 | ||
2bee72a6 TM |
4119 | static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) |
4120 | { | |
4121 | struct nfs_client *clp = server->nfs_client; | |
4122 | struct nfs4_state *state = lsp->ls_state; | |
4123 | ||
4124 | switch (error) { | |
4125 | case -NFS4ERR_ADMIN_REVOKED: | |
4126 | case -NFS4ERR_BAD_STATEID: | |
4127 | case -NFS4ERR_EXPIRED: | |
4128 | if (new_lock_owner != 0 || | |
4129 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4130 | nfs4_state_mark_reclaim_nograce(clp, state); | |
4131 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
a2c0b9e2 TM |
4132 | break; |
4133 | case -NFS4ERR_STALE_STATEID: | |
4134 | if (new_lock_owner != 0 || | |
4135 | (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
4136 | nfs4_state_mark_reclaim_reboot(clp, state); | |
4137 | lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; | |
2bee72a6 TM |
4138 | }; |
4139 | } | |
4140 | ||
afe6c27c | 4141 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) |
a5d16a4d TM |
4142 | { |
4143 | struct nfs4_lockdata *data; | |
4144 | struct rpc_task *task; | |
5138fde0 TM |
4145 | struct rpc_message msg = { |
4146 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
4147 | .rpc_cred = state->owner->so_cred, | |
4148 | }; | |
c970aa85 TM |
4149 | struct rpc_task_setup task_setup_data = { |
4150 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 4151 | .rpc_message = &msg, |
c970aa85 | 4152 | .callback_ops = &nfs4_lock_ops, |
101070ca | 4153 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
4154 | .flags = RPC_TASK_ASYNC, |
4155 | }; | |
a5d16a4d TM |
4156 | int ret; |
4157 | ||
3110ff80 | 4158 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 4159 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
4160 | fl->fl_u.nfs4_fl.owner); |
4161 | if (data == NULL) | |
4162 | return -ENOMEM; | |
4163 | if (IS_SETLKW(cmd)) | |
4164 | data->arg.block = 1; | |
b257957e AB |
4165 | if (recovery_type > NFS_LOCK_NEW) { |
4166 | if (recovery_type == NFS_LOCK_RECLAIM) | |
afe6c27c | 4167 | data->arg.reclaim = NFS_LOCK_RECLAIM; |
b257957e AB |
4168 | task_setup_data.callback_ops = &nfs4_recover_lock_ops; |
4169 | } | |
5138fde0 TM |
4170 | msg.rpc_argp = &data->arg, |
4171 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
4172 | task_setup_data.callback_data = data; |
4173 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 4174 | if (IS_ERR(task)) |
a5d16a4d | 4175 | return PTR_ERR(task); |
a5d16a4d TM |
4176 | ret = nfs4_wait_for_completion_rpc_task(task); |
4177 | if (ret == 0) { | |
4178 | ret = data->rpc_status; | |
2bee72a6 TM |
4179 | if (ret) |
4180 | nfs4_handle_setlk_error(data->server, data->lsp, | |
4181 | data->arg.new_lock_owner, ret); | |
a5d16a4d TM |
4182 | } else |
4183 | data->cancelled = 1; | |
e6b3c4db | 4184 | rpc_put_task(task); |
3110ff80 | 4185 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 4186 | return ret; |
1da177e4 LT |
4187 | } |
4188 | ||
4189 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
4190 | { | |
202b50dc TM |
4191 | struct nfs_server *server = NFS_SERVER(state->inode); |
4192 | struct nfs4_exception exception = { }; | |
4193 | int err; | |
4194 | ||
4195 | do { | |
42a2d13e TM |
4196 | /* Cache the lock if possible... */ |
4197 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
4198 | return 0; | |
afe6c27c | 4199 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); |
2c643488 | 4200 | if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED) |
202b50dc TM |
4201 | break; |
4202 | nfs4_handle_exception(server, err, &exception); | |
4203 | } while (exception.retry); | |
4204 | return err; | |
1da177e4 LT |
4205 | } |
4206 | ||
4207 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
4208 | { | |
202b50dc TM |
4209 | struct nfs_server *server = NFS_SERVER(state->inode); |
4210 | struct nfs4_exception exception = { }; | |
4211 | int err; | |
4212 | ||
6bfc93ef TM |
4213 | err = nfs4_set_lock_state(state, request); |
4214 | if (err != 0) | |
4215 | return err; | |
202b50dc | 4216 | do { |
42a2d13e TM |
4217 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
4218 | return 0; | |
afe6c27c | 4219 | err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); |
a9ed2e25 TM |
4220 | switch (err) { |
4221 | default: | |
4222 | goto out; | |
4223 | case -NFS4ERR_GRACE: | |
4224 | case -NFS4ERR_DELAY: | |
2c643488 | 4225 | case -EKEYEXPIRED: |
a9ed2e25 TM |
4226 | nfs4_handle_exception(server, err, &exception); |
4227 | err = 0; | |
4228 | } | |
202b50dc | 4229 | } while (exception.retry); |
a9ed2e25 | 4230 | out: |
202b50dc | 4231 | return err; |
1da177e4 LT |
4232 | } |
4233 | ||
4234 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4235 | { | |
19e03c57 | 4236 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 4237 | unsigned char fl_flags = request->fl_flags; |
8e469ebd | 4238 | int status = -ENOLCK; |
1da177e4 | 4239 | |
8e469ebd TM |
4240 | if ((fl_flags & FL_POSIX) && |
4241 | !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) | |
4242 | goto out; | |
6bfc93ef | 4243 | /* Is this a delegated open? */ |
6bfc93ef TM |
4244 | status = nfs4_set_lock_state(state, request); |
4245 | if (status != 0) | |
4246 | goto out; | |
01c3b861 TM |
4247 | request->fl_flags |= FL_ACCESS; |
4248 | status = do_vfs_lock(request->fl_file, request); | |
4249 | if (status < 0) | |
4250 | goto out; | |
19e03c57 | 4251 | down_read(&nfsi->rwsem); |
01c3b861 | 4252 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 4253 | /* Yes: cache locks! */ |
01c3b861 | 4254 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
4255 | request->fl_flags = fl_flags & ~FL_SLEEP; |
4256 | status = do_vfs_lock(request->fl_file, request); | |
4257 | goto out_unlock; | |
01c3b861 | 4258 | } |
afe6c27c | 4259 | status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); |
6bfc93ef | 4260 | if (status != 0) |
01c3b861 | 4261 | goto out_unlock; |
6bfc93ef | 4262 | /* Note: we always want to sleep here! */ |
01c3b861 | 4263 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 4264 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 4265 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 4266 | out_unlock: |
19e03c57 | 4267 | up_read(&nfsi->rwsem); |
01c3b861 TM |
4268 | out: |
4269 | request->fl_flags = fl_flags; | |
1da177e4 LT |
4270 | return status; |
4271 | } | |
4272 | ||
4273 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
4274 | { | |
4275 | struct nfs4_exception exception = { }; | |
4276 | int err; | |
4277 | ||
4278 | do { | |
965b5d67 TM |
4279 | err = _nfs4_proc_setlk(state, cmd, request); |
4280 | if (err == -NFS4ERR_DENIED) | |
4281 | err = -EAGAIN; | |
1da177e4 | 4282 | err = nfs4_handle_exception(NFS_SERVER(state->inode), |
965b5d67 | 4283 | err, &exception); |
1da177e4 LT |
4284 | } while (exception.retry); |
4285 | return err; | |
4286 | } | |
4287 | ||
4288 | static int | |
4289 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
4290 | { | |
4291 | struct nfs_open_context *ctx; | |
4292 | struct nfs4_state *state; | |
4293 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
4294 | int status; | |
4295 | ||
4296 | /* verify open state */ | |
cd3758e3 | 4297 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4298 | state = ctx->state; |
4299 | ||
4300 | if (request->fl_start < 0 || request->fl_end < 0) | |
4301 | return -EINVAL; | |
4302 | ||
d953126a TM |
4303 | if (IS_GETLK(cmd)) { |
4304 | if (state != NULL) | |
4305 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4306 | return 0; | |
4307 | } | |
1da177e4 LT |
4308 | |
4309 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4310 | return -EINVAL; | |
4311 | ||
d953126a TM |
4312 | if (request->fl_type == F_UNLCK) { |
4313 | if (state != NULL) | |
4314 | return nfs4_proc_unlck(state, cmd, request); | |
4315 | return 0; | |
4316 | } | |
1da177e4 | 4317 | |
d953126a TM |
4318 | if (state == NULL) |
4319 | return -ENOLCK; | |
1da177e4 LT |
4320 | do { |
4321 | status = nfs4_proc_setlk(state, cmd, request); | |
4322 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4323 | break; | |
4324 | timeout = nfs4_set_lock_task_retry(timeout); | |
4325 | status = -ERESTARTSYS; | |
4326 | if (signalled()) | |
4327 | break; | |
4328 | } while(status < 0); | |
1da177e4 LT |
4329 | return status; |
4330 | } | |
4331 | ||
888e694c TM |
4332 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4333 | { | |
4334 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4335 | struct nfs4_exception exception = { }; | |
4336 | int err; | |
4337 | ||
4338 | err = nfs4_set_lock_state(state, fl); | |
4339 | if (err != 0) | |
4340 | goto out; | |
4341 | do { | |
afe6c27c | 4342 | err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); |
d5122201 TM |
4343 | switch (err) { |
4344 | default: | |
4345 | printk(KERN_ERR "%s: unhandled error %d.\n", | |
4346 | __func__, err); | |
4347 | case 0: | |
965b5d67 | 4348 | case -ESTALE: |
d5122201 TM |
4349 | goto out; |
4350 | case -NFS4ERR_EXPIRED: | |
4351 | case -NFS4ERR_STALE_CLIENTID: | |
965b5d67 | 4352 | case -NFS4ERR_STALE_STATEID: |
74e7bb73 RL |
4353 | case -NFS4ERR_BADSESSION: |
4354 | case -NFS4ERR_BADSLOT: | |
4355 | case -NFS4ERR_BAD_HIGH_SLOT: | |
4356 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
4357 | case -NFS4ERR_DEADSESSION: | |
d5122201 TM |
4358 | nfs4_schedule_state_recovery(server->nfs_client); |
4359 | goto out; | |
965b5d67 TM |
4360 | case -ERESTARTSYS: |
4361 | /* | |
4362 | * The show must go on: exit, but mark the | |
4363 | * stateid as needing recovery. | |
4364 | */ | |
4365 | case -NFS4ERR_ADMIN_REVOKED: | |
4366 | case -NFS4ERR_BAD_STATEID: | |
4367 | case -NFS4ERR_OPENMODE: | |
4368 | nfs4_state_mark_reclaim_nograce(server->nfs_client, state); | |
4369 | err = 0; | |
4370 | goto out; | |
4371 | case -ENOMEM: | |
4372 | case -NFS4ERR_DENIED: | |
4373 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
4374 | err = 0; | |
4375 | goto out; | |
d5122201 | 4376 | case -NFS4ERR_DELAY: |
2c643488 | 4377 | case -EKEYEXPIRED: |
d5122201 TM |
4378 | break; |
4379 | } | |
888e694c TM |
4380 | err = nfs4_handle_exception(server, err, &exception); |
4381 | } while (exception.retry); | |
4382 | out: | |
4383 | return err; | |
4384 | } | |
6b3b5496 | 4385 | |
aa1870af BF |
4386 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4387 | ||
6b3b5496 BF |
4388 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4389 | size_t buflen, int flags) | |
4390 | { | |
4b580ee3 BF |
4391 | struct inode *inode = dentry->d_inode; |
4392 | ||
4393 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4394 | return -EOPNOTSUPP; | |
4395 | ||
4b580ee3 | 4396 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4397 | } |
4398 | ||
4399 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4400 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4401 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4402 | * attributes in kernel-managed attribute namespaces. */ | |
4403 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4404 | size_t buflen) | |
4405 | { | |
aa1870af BF |
4406 | struct inode *inode = dentry->d_inode; |
4407 | ||
4408 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4409 | return -EOPNOTSUPP; | |
4410 | ||
4411 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4412 | } |
4413 | ||
4414 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4415 | { | |
aa1870af | 4416 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4417 | |
096455a2 BF |
4418 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4419 | return 0; | |
6b3b5496 BF |
4420 | if (buf && buflen < len) |
4421 | return -ERANGE; | |
4422 | if (buf) | |
aa1870af BF |
4423 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4424 | return len; | |
6b3b5496 BF |
4425 | } |
4426 | ||
69aaaae1 TM |
4427 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4428 | { | |
4429 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4430 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4431 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4432 | return; | |
4433 | ||
4434 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4435 | NFS_ATTR_FATTR_NLINK; | |
4436 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4437 | fattr->nlink = 2; | |
4438 | } | |
4439 | ||
56659e99 | 4440 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4441 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4442 | { |
4443 | struct nfs_server *server = NFS_SERVER(dir); | |
4444 | u32 bitmask[2] = { | |
361e624f MN |
4445 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4446 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4447 | }; |
4448 | struct nfs4_fs_locations_arg args = { | |
4449 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4450 | .name = name, |
683b57b4 TM |
4451 | .page = page, |
4452 | .bitmask = bitmask, | |
4453 | }; | |
22958463 BH |
4454 | struct nfs4_fs_locations_res res = { |
4455 | .fs_locations = fs_locations, | |
4456 | }; | |
683b57b4 TM |
4457 | struct rpc_message msg = { |
4458 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4459 | .rpc_argp = &args, | |
22958463 | 4460 | .rpc_resp = &res, |
683b57b4 TM |
4461 | }; |
4462 | int status; | |
4463 | ||
3110ff80 | 4464 | dprintk("%s: start\n", __func__); |
c228fd3a | 4465 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4466 | fs_locations->server = server; |
830b8e33 | 4467 | fs_locations->nlocations = 0; |
cccef3b9 | 4468 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4469 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4470 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4471 | return status; |
4472 | } | |
4473 | ||
557134a3 | 4474 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4475 | /* |
4476 | * nfs4_proc_exchange_id() | |
4477 | * | |
4478 | * Since the clientid has expired, all compounds using sessions | |
4479 | * associated with the stale clientid will be returning | |
4480 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4481 | * be in some phase of session reset. | |
4482 | */ | |
4d643d1d | 4483 | int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) |
99fe60d0 BH |
4484 | { |
4485 | nfs4_verifier verifier; | |
4486 | struct nfs41_exchange_id_args args = { | |
4487 | .client = clp, | |
4488 | .flags = clp->cl_exchange_flags, | |
4489 | }; | |
4490 | struct nfs41_exchange_id_res res = { | |
4491 | .client = clp, | |
4492 | }; | |
4493 | int status; | |
4494 | struct rpc_message msg = { | |
4495 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4496 | .rpc_argp = &args, | |
4497 | .rpc_resp = &res, | |
4498 | .rpc_cred = cred, | |
4499 | }; | |
4500 | __be32 *p; | |
4501 | ||
4502 | dprintk("--> %s\n", __func__); | |
4503 | BUG_ON(clp == NULL); | |
a7b72103 | 4504 | |
7b183d0d AB |
4505 | /* Remove server-only flags */ |
4506 | args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R; | |
4507 | ||
99fe60d0 BH |
4508 | p = (u32 *)verifier.data; |
4509 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4510 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4511 | args.verifier = &verifier; | |
4512 | ||
4513 | while (1) { | |
4514 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4515 | "%s/%s %u", | |
4516 | clp->cl_ipaddr, | |
4517 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4518 | RPC_DISPLAY_ADDR), | |
4519 | clp->cl_id_uniquifier); | |
4520 | ||
4521 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4522 | ||
180b62a3 | 4523 | if (status != -NFS4ERR_CLID_INUSE) |
99fe60d0 BH |
4524 | break; |
4525 | ||
4526 | if (signalled()) | |
4527 | break; | |
4528 | ||
4529 | if (++clp->cl_id_uniquifier == 0) | |
4530 | break; | |
4531 | } | |
4532 | ||
4533 | dprintk("<-- %s status= %d\n", __func__, status); | |
4534 | return status; | |
4535 | } | |
4536 | ||
2050f0cc AA |
4537 | struct nfs4_get_lease_time_data { |
4538 | struct nfs4_get_lease_time_args *args; | |
4539 | struct nfs4_get_lease_time_res *res; | |
4540 | struct nfs_client *clp; | |
4541 | }; | |
4542 | ||
4543 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4544 | void *calldata) | |
4545 | { | |
4546 | int ret; | |
4547 | struct nfs4_get_lease_time_data *data = | |
4548 | (struct nfs4_get_lease_time_data *)calldata; | |
4549 | ||
4550 | dprintk("--> %s\n", __func__); | |
689cf5c1 | 4551 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
2050f0cc AA |
4552 | /* just setup sequence, do not trigger session recovery |
4553 | since we're invoked within one */ | |
4554 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
689cf5c1 AB |
4555 | &data->args->la_seq_args, |
4556 | &data->res->lr_seq_res, 0, task); | |
2050f0cc AA |
4557 | |
4558 | BUG_ON(ret == -EAGAIN); | |
4559 | rpc_call_start(task); | |
4560 | dprintk("<-- %s\n", __func__); | |
4561 | } | |
4562 | ||
4563 | /* | |
4564 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4565 | * from sequence operation or clientid errors. | |
4566 | */ | |
4567 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4568 | { | |
4569 | struct nfs4_get_lease_time_data *data = | |
4570 | (struct nfs4_get_lease_time_data *)calldata; | |
4571 | ||
4572 | dprintk("--> %s\n", __func__); | |
4573 | nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); | |
4574 | switch (task->tk_status) { | |
4575 | case -NFS4ERR_DELAY: | |
4576 | case -NFS4ERR_GRACE: | |
2c643488 | 4577 | case -EKEYEXPIRED: |
2050f0cc AA |
4578 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); |
4579 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4580 | task->tk_status = 0; | |
0110ee15 | 4581 | nfs_restart_rpc(task, data->clp); |
2050f0cc AA |
4582 | return; |
4583 | } | |
2050f0cc AA |
4584 | dprintk("<-- %s\n", __func__); |
4585 | } | |
4586 | ||
4587 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4588 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4589 | .rpc_call_done = nfs4_get_lease_time_done, | |
4590 | }; | |
4591 | ||
4592 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4593 | { | |
4594 | struct rpc_task *task; | |
4595 | struct nfs4_get_lease_time_args args; | |
4596 | struct nfs4_get_lease_time_res res = { | |
4597 | .lr_fsinfo = fsinfo, | |
4598 | }; | |
4599 | struct nfs4_get_lease_time_data data = { | |
4600 | .args = &args, | |
4601 | .res = &res, | |
4602 | .clp = clp, | |
4603 | }; | |
4604 | struct rpc_message msg = { | |
4605 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4606 | .rpc_argp = &args, | |
4607 | .rpc_resp = &res, | |
4608 | }; | |
4609 | struct rpc_task_setup task_setup = { | |
4610 | .rpc_client = clp->cl_rpcclient, | |
4611 | .rpc_message = &msg, | |
4612 | .callback_ops = &nfs4_get_lease_time_ops, | |
4613 | .callback_data = &data | |
4614 | }; | |
4615 | int status; | |
4616 | ||
4617 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4618 | dprintk("--> %s\n", __func__); | |
4619 | task = rpc_run_task(&task_setup); | |
4620 | ||
4621 | if (IS_ERR(task)) | |
4622 | status = PTR_ERR(task); | |
4623 | else { | |
4624 | status = task->tk_status; | |
4625 | rpc_put_task(task); | |
4626 | } | |
4627 | dprintk("<-- %s return %d\n", __func__, status); | |
4628 | ||
4629 | return status; | |
4630 | } | |
4631 | ||
b73dafa7 RL |
4632 | /* |
4633 | * Reset a slot table | |
4634 | */ | |
104aeba4 AA |
4635 | static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs, |
4636 | int ivalue) | |
ac72b7b3 | 4637 | { |
104aeba4 | 4638 | struct nfs4_slot *new = NULL; |
b73dafa7 | 4639 | int i; |
ac72b7b3 AA |
4640 | int ret = 0; |
4641 | ||
104aeba4 AA |
4642 | dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__, |
4643 | max_reqs, tbl->max_slots); | |
ac72b7b3 | 4644 | |
104aeba4 AA |
4645 | /* Does the newly negotiated max_reqs match the existing slot table? */ |
4646 | if (max_reqs != tbl->max_slots) { | |
4647 | ret = -ENOMEM; | |
4648 | new = kmalloc(max_reqs * sizeof(struct nfs4_slot), | |
4649 | GFP_KERNEL); | |
4650 | if (!new) | |
4651 | goto out; | |
4652 | ret = 0; | |
4653 | kfree(tbl->slots); | |
ac72b7b3 AA |
4654 | } |
4655 | spin_lock(&tbl->slot_tbl_lock); | |
104aeba4 AA |
4656 | if (new) { |
4657 | tbl->slots = new; | |
4658 | tbl->max_slots = max_reqs; | |
4659 | } | |
4660 | for (i = 0; i < tbl->max_slots; ++i) | |
b73dafa7 | 4661 | tbl->slots[i].seq_nr = ivalue; |
ac72b7b3 AA |
4662 | spin_unlock(&tbl->slot_tbl_lock); |
4663 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4664 | tbl, tbl->slots, tbl->max_slots); | |
4665 | out: | |
4666 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4667 | return ret; | |
4668 | } | |
4669 | ||
b73dafa7 RL |
4670 | /* |
4671 | * Reset the forechannel and backchannel slot tables | |
4672 | */ | |
4673 | static int nfs4_reset_slot_tables(struct nfs4_session *session) | |
4674 | { | |
4675 | int status; | |
4676 | ||
4677 | status = nfs4_reset_slot_table(&session->fc_slot_table, | |
104aeba4 | 4678 | session->fc_attrs.max_reqs, 1); |
f8625a6a RL |
4679 | if (status) |
4680 | return status; | |
4681 | ||
4682 | status = nfs4_reset_slot_table(&session->bc_slot_table, | |
104aeba4 | 4683 | session->bc_attrs.max_reqs, 0); |
b73dafa7 RL |
4684 | return status; |
4685 | } | |
4686 | ||
f8625a6a RL |
4687 | /* Destroy the slot table */ |
4688 | static void nfs4_destroy_slot_tables(struct nfs4_session *session) | |
4689 | { | |
4690 | if (session->fc_slot_table.slots != NULL) { | |
4691 | kfree(session->fc_slot_table.slots); | |
4692 | session->fc_slot_table.slots = NULL; | |
4693 | } | |
4694 | if (session->bc_slot_table.slots != NULL) { | |
4695 | kfree(session->bc_slot_table.slots); | |
4696 | session->bc_slot_table.slots = NULL; | |
4697 | } | |
4698 | return; | |
4699 | } | |
4700 | ||
fc931582 AA |
4701 | /* |
4702 | * Initialize slot table | |
4703 | */ | |
050047ce RL |
4704 | static int nfs4_init_slot_table(struct nfs4_slot_table *tbl, |
4705 | int max_slots, int ivalue) | |
fc931582 | 4706 | { |
fc931582 AA |
4707 | struct nfs4_slot *slot; |
4708 | int ret = -ENOMEM; | |
4709 | ||
4710 | BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE); | |
4711 | ||
050047ce | 4712 | dprintk("--> %s: max_reqs=%u\n", __func__, max_slots); |
fc931582 AA |
4713 | |
4714 | slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL); | |
4715 | if (!slot) | |
4716 | goto out; | |
fc931582 AA |
4717 | ret = 0; |
4718 | ||
4719 | spin_lock(&tbl->slot_tbl_lock); | |
fc931582 AA |
4720 | tbl->max_slots = max_slots; |
4721 | tbl->slots = slot; | |
4722 | tbl->highest_used_slotid = -1; /* no slot is currently used */ | |
4723 | spin_unlock(&tbl->slot_tbl_lock); | |
4724 | dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__, | |
4725 | tbl, tbl->slots, tbl->max_slots); | |
4726 | out: | |
4727 | dprintk("<-- %s: return %d\n", __func__, ret); | |
4728 | return ret; | |
fc931582 AA |
4729 | } |
4730 | ||
050047ce RL |
4731 | /* |
4732 | * Initialize the forechannel and backchannel tables | |
4733 | */ | |
4734 | static int nfs4_init_slot_tables(struct nfs4_session *session) | |
4735 | { | |
f26468fb TM |
4736 | struct nfs4_slot_table *tbl; |
4737 | int status = 0; | |
050047ce | 4738 | |
f26468fb TM |
4739 | tbl = &session->fc_slot_table; |
4740 | if (tbl->slots == NULL) { | |
4741 | status = nfs4_init_slot_table(tbl, | |
4742 | session->fc_attrs.max_reqs, 1); | |
4743 | if (status) | |
4744 | return status; | |
4745 | } | |
050047ce | 4746 | |
f26468fb TM |
4747 | tbl = &session->bc_slot_table; |
4748 | if (tbl->slots == NULL) { | |
4749 | status = nfs4_init_slot_table(tbl, | |
4750 | session->bc_attrs.max_reqs, 0); | |
4751 | if (status) | |
4752 | nfs4_destroy_slot_tables(session); | |
4753 | } | |
f8625a6a RL |
4754 | |
4755 | return status; | |
557134a3 AA |
4756 | } |
4757 | ||
4758 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4759 | { | |
4760 | struct nfs4_session *session; | |
4761 | struct nfs4_slot_table *tbl; | |
4762 | ||
4763 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
4764 | if (!session) | |
4765 | return NULL; | |
76db6d95 | 4766 | |
76db6d95 AA |
4767 | /* |
4768 | * The create session reply races with the server back | |
4769 | * channel probe. Mark the client NFS_CS_SESSION_INITING | |
4770 | * so that the client back channel can find the | |
4771 | * nfs_client struct | |
4772 | */ | |
4773 | clp->cl_cons_state = NFS_CS_SESSION_INITING; | |
ea028ac9 | 4774 | init_completion(&session->complete); |
76db6d95 | 4775 | |
557134a3 | 4776 | tbl = &session->fc_slot_table; |
9dfdf404 | 4777 | tbl->highest_used_slotid = -1; |
557134a3 | 4778 | spin_lock_init(&tbl->slot_tbl_lock); |
689cf5c1 | 4779 | rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table"); |
f8625a6a RL |
4780 | |
4781 | tbl = &session->bc_slot_table; | |
9dfdf404 | 4782 | tbl->highest_used_slotid = -1; |
f8625a6a RL |
4783 | spin_lock_init(&tbl->slot_tbl_lock); |
4784 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table"); | |
4785 | ||
557134a3 AA |
4786 | session->clp = clp; |
4787 | return session; | |
4788 | } | |
4789 | ||
4790 | void nfs4_destroy_session(struct nfs4_session *session) | |
4791 | { | |
5a0ffe54 AA |
4792 | nfs4_proc_destroy_session(session); |
4793 | dprintk("%s Destroy backchannel for xprt %p\n", | |
4794 | __func__, session->clp->cl_rpcclient->cl_xprt); | |
4795 | xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt, | |
4796 | NFS41_BC_MIN_CALLBACKS); | |
f8625a6a | 4797 | nfs4_destroy_slot_tables(session); |
557134a3 AA |
4798 | kfree(session); |
4799 | } | |
4800 | ||
fc931582 AA |
4801 | /* |
4802 | * Initialize the values to be used by the client in CREATE_SESSION | |
4803 | * If nfs4_init_session set the fore channel request and response sizes, | |
4804 | * use them. | |
4805 | * | |
4806 | * Set the back channel max_resp_sz_cached to zero to force the client to | |
4807 | * always set csa_cachethis to FALSE because the current implementation | |
4808 | * of the back channel DRC only supports caching the CB_SEQUENCE operation. | |
4809 | */ | |
4810 | static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) | |
4811 | { | |
4812 | struct nfs4_session *session = args->client->cl_session; | |
4813 | unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz, | |
4814 | mxresp_sz = session->fc_attrs.max_resp_sz; | |
4815 | ||
4816 | if (mxrqst_sz == 0) | |
4817 | mxrqst_sz = NFS_MAX_FILE_IO_SIZE; | |
4818 | if (mxresp_sz == 0) | |
4819 | mxresp_sz = NFS_MAX_FILE_IO_SIZE; | |
4820 | /* Fore channel attributes */ | |
4821 | args->fc_attrs.headerpadsz = 0; | |
4822 | args->fc_attrs.max_rqst_sz = mxrqst_sz; | |
4823 | args->fc_attrs.max_resp_sz = mxresp_sz; | |
fc931582 AA |
4824 | args->fc_attrs.max_ops = NFS4_MAX_OPS; |
4825 | args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs; | |
4826 | ||
4827 | dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " | |
8e0d46e1 | 4828 | "max_ops=%u max_reqs=%u\n", |
fc931582 AA |
4829 | __func__, |
4830 | args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, | |
8e0d46e1 | 4831 | args->fc_attrs.max_ops, args->fc_attrs.max_reqs); |
fc931582 AA |
4832 | |
4833 | /* Back channel attributes */ | |
4834 | args->bc_attrs.headerpadsz = 0; | |
4835 | args->bc_attrs.max_rqst_sz = PAGE_SIZE; | |
4836 | args->bc_attrs.max_resp_sz = PAGE_SIZE; | |
4837 | args->bc_attrs.max_resp_sz_cached = 0; | |
4838 | args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; | |
4839 | args->bc_attrs.max_reqs = 1; | |
4840 | ||
4841 | dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " | |
4842 | "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", | |
4843 | __func__, | |
4844 | args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, | |
4845 | args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, | |
4846 | args->bc_attrs.max_reqs); | |
4847 | } | |
4848 | ||
8d35301d AA |
4849 | static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd) |
4850 | { | |
4851 | if (rcvd <= sent) | |
4852 | return 0; | |
4853 | printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. " | |
4854 | "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd); | |
4855 | return -EINVAL; | |
4856 | } | |
4857 | ||
4858 | #define _verify_fore_channel_attr(_name_) \ | |
4859 | _verify_channel_attr("fore", #_name_, \ | |
4860 | args->fc_attrs._name_, \ | |
4861 | session->fc_attrs._name_) | |
4862 | ||
4863 | #define _verify_back_channel_attr(_name_) \ | |
4864 | _verify_channel_attr("back", #_name_, \ | |
4865 | args->bc_attrs._name_, \ | |
4866 | session->bc_attrs._name_) | |
4867 | ||
4868 | /* | |
4869 | * The server is not allowed to increase the fore channel header pad size, | |
4870 | * maximum response size, or maximum number of operations. | |
4871 | * | |
4872 | * The back channel attributes are only negotiatied down: We send what the | |
4873 | * (back channel) server insists upon. | |
4874 | */ | |
4875 | static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, | |
4876 | struct nfs4_session *session) | |
4877 | { | |
4878 | int ret = 0; | |
4879 | ||
4880 | ret |= _verify_fore_channel_attr(headerpadsz); | |
4881 | ret |= _verify_fore_channel_attr(max_resp_sz); | |
4882 | ret |= _verify_fore_channel_attr(max_ops); | |
4883 | ||
4884 | ret |= _verify_back_channel_attr(headerpadsz); | |
4885 | ret |= _verify_back_channel_attr(max_rqst_sz); | |
4886 | ret |= _verify_back_channel_attr(max_resp_sz); | |
4887 | ret |= _verify_back_channel_attr(max_resp_sz_cached); | |
4888 | ret |= _verify_back_channel_attr(max_ops); | |
4889 | ret |= _verify_back_channel_attr(max_reqs); | |
4890 | ||
4891 | return ret; | |
4892 | } | |
4893 | ||
fc931582 AA |
4894 | static int _nfs4_proc_create_session(struct nfs_client *clp) |
4895 | { | |
4896 | struct nfs4_session *session = clp->cl_session; | |
4897 | struct nfs41_create_session_args args = { | |
4898 | .client = clp, | |
4899 | .cb_program = NFS4_CALLBACK, | |
4900 | }; | |
4901 | struct nfs41_create_session_res res = { | |
4902 | .client = clp, | |
4903 | }; | |
4904 | struct rpc_message msg = { | |
4905 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], | |
4906 | .rpc_argp = &args, | |
4907 | .rpc_resp = &res, | |
4908 | }; | |
4909 | int status; | |
4910 | ||
4911 | nfs4_init_channel_attrs(&args); | |
0f91421e | 4912 | args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); |
fc931582 AA |
4913 | |
4914 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4915 | ||
8d35301d AA |
4916 | if (!status) |
4917 | /* Verify the session's negotiated channel_attrs values */ | |
4918 | status = nfs4_verify_channel_attrs(&args, session); | |
fc931582 AA |
4919 | if (!status) { |
4920 | /* Increment the clientid slot sequence id */ | |
4921 | clp->cl_seqid++; | |
4922 | } | |
4923 | ||
4924 | return status; | |
4925 | } | |
4926 | ||
4927 | /* | |
4928 | * Issues a CREATE_SESSION operation to the server. | |
4929 | * It is the responsibility of the caller to verify the session is | |
4930 | * expired before calling this routine. | |
4931 | */ | |
f26468fb | 4932 | int nfs4_proc_create_session(struct nfs_client *clp) |
fc931582 AA |
4933 | { |
4934 | int status; | |
4935 | unsigned *ptr; | |
fc931582 AA |
4936 | struct nfs4_session *session = clp->cl_session; |
4937 | ||
4938 | dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); | |
4939 | ||
4940 | status = _nfs4_proc_create_session(clp); | |
4941 | if (status) | |
4942 | goto out; | |
4943 | ||
f26468fb TM |
4944 | /* Init and reset the fore channel */ |
4945 | status = nfs4_init_slot_tables(session); | |
4946 | dprintk("slot table initialization returned %d\n", status); | |
4947 | if (status) | |
4948 | goto out; | |
4949 | status = nfs4_reset_slot_tables(session); | |
4950 | dprintk("slot table reset returned %d\n", status); | |
fc931582 AA |
4951 | if (status) |
4952 | goto out; | |
4953 | ||
4954 | ptr = (unsigned *)&session->sess_id.data[0]; | |
4955 | dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, | |
4956 | clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); | |
fc931582 AA |
4957 | out: |
4958 | dprintk("<-- %s\n", __func__); | |
4959 | return status; | |
4960 | } | |
4961 | ||
0f3e66c6 AA |
4962 | /* |
4963 | * Issue the over-the-wire RPC DESTROY_SESSION. | |
4964 | * The caller must serialize access to this routine. | |
4965 | */ | |
4966 | int nfs4_proc_destroy_session(struct nfs4_session *session) | |
4967 | { | |
4968 | int status = 0; | |
4969 | struct rpc_message msg; | |
4970 | ||
4971 | dprintk("--> nfs4_proc_destroy_session\n"); | |
4972 | ||
4973 | /* session is still being setup */ | |
4974 | if (session->clp->cl_cons_state != NFS_CS_READY) | |
4975 | return status; | |
4976 | ||
4977 | msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION]; | |
4978 | msg.rpc_argp = session; | |
4979 | msg.rpc_resp = NULL; | |
4980 | msg.rpc_cred = NULL; | |
4981 | status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0); | |
4982 | ||
4983 | if (status) | |
4984 | printk(KERN_WARNING | |
4985 | "Got error %d from the server on DESTROY_SESSION. " | |
4986 | "Session has been destroyed regardless...\n", status); | |
4987 | ||
4988 | dprintk("<-- nfs4_proc_destroy_session\n"); | |
4989 | return status; | |
4990 | } | |
4991 | ||
fccba804 TM |
4992 | int nfs4_init_session(struct nfs_server *server) |
4993 | { | |
4994 | struct nfs_client *clp = server->nfs_client; | |
2449ea2e | 4995 | struct nfs4_session *session; |
68bf05ef | 4996 | unsigned int rsize, wsize; |
fccba804 TM |
4997 | int ret; |
4998 | ||
4999 | if (!nfs4_has_session(clp)) | |
5000 | return 0; | |
5001 | ||
68bf05ef AA |
5002 | rsize = server->rsize; |
5003 | if (rsize == 0) | |
5004 | rsize = NFS_MAX_FILE_IO_SIZE; | |
5005 | wsize = server->wsize; | |
5006 | if (wsize == 0) | |
5007 | wsize = NFS_MAX_FILE_IO_SIZE; | |
5008 | ||
2449ea2e | 5009 | session = clp->cl_session; |
68bf05ef AA |
5010 | session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead; |
5011 | session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead; | |
2449ea2e | 5012 | |
fccba804 TM |
5013 | ret = nfs4_recover_expired_lease(server); |
5014 | if (!ret) | |
5015 | ret = nfs4_check_client_ready(clp); | |
5016 | return ret; | |
5017 | } | |
5018 | ||
fc01cea9 AA |
5019 | /* |
5020 | * Renew the cl_session lease. | |
5021 | */ | |
5022 | static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) | |
5023 | { | |
5024 | struct nfs4_sequence_args args; | |
5025 | struct nfs4_sequence_res res; | |
5026 | ||
5027 | struct rpc_message msg = { | |
5028 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5029 | .rpc_argp = &args, | |
5030 | .rpc_resp = &res, | |
5031 | .rpc_cred = cred, | |
5032 | }; | |
5033 | ||
5034 | args.sa_cache_this = 0; | |
5035 | ||
5036 | return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args, | |
b257957e | 5037 | &res, args.sa_cache_this, 1); |
fc01cea9 AA |
5038 | } |
5039 | ||
dc96aef9 AB |
5040 | static void nfs41_sequence_release(void *data) |
5041 | { | |
5042 | struct nfs_client *clp = (struct nfs_client *)data; | |
5043 | ||
7135840f AB |
5044 | if (atomic_read(&clp->cl_count) > 1) |
5045 | nfs4_schedule_state_renewal(clp); | |
5046 | nfs_put_client(clp); | |
dc96aef9 AB |
5047 | } |
5048 | ||
5049 | static void nfs41_sequence_call_done(struct rpc_task *task, void *data) | |
fc01cea9 AA |
5050 | { |
5051 | struct nfs_client *clp = (struct nfs_client *)data; | |
5052 | ||
5053 | nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status); | |
5054 | ||
5055 | if (task->tk_status < 0) { | |
5056 | dprintk("%s ERROR %d\n", __func__, task->tk_status); | |
7135840f AB |
5057 | if (atomic_read(&clp->cl_count) == 1) |
5058 | goto out; | |
fc01cea9 AA |
5059 | |
5060 | if (_nfs4_async_handle_error(task, NULL, clp, NULL) | |
5061 | == -EAGAIN) { | |
0110ee15 | 5062 | nfs_restart_rpc(task, clp); |
fc01cea9 AA |
5063 | return; |
5064 | } | |
5065 | } | |
fc01cea9 | 5066 | dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); |
7135840f | 5067 | out: |
fc01cea9 AA |
5068 | kfree(task->tk_msg.rpc_argp); |
5069 | kfree(task->tk_msg.rpc_resp); | |
5070 | ||
5071 | dprintk("<-- %s\n", __func__); | |
5072 | } | |
5073 | ||
5074 | static void nfs41_sequence_prepare(struct rpc_task *task, void *data) | |
5075 | { | |
5076 | struct nfs_client *clp; | |
5077 | struct nfs4_sequence_args *args; | |
5078 | struct nfs4_sequence_res *res; | |
5079 | ||
5080 | clp = (struct nfs_client *)data; | |
5081 | args = task->tk_msg.rpc_argp; | |
5082 | res = task->tk_msg.rpc_resp; | |
5083 | ||
5084 | if (nfs4_setup_sequence(clp, args, res, 0, task)) | |
5085 | return; | |
5086 | rpc_call_start(task); | |
5087 | } | |
5088 | ||
5089 | static const struct rpc_call_ops nfs41_sequence_ops = { | |
5090 | .rpc_call_done = nfs41_sequence_call_done, | |
5091 | .rpc_call_prepare = nfs41_sequence_prepare, | |
dc96aef9 | 5092 | .rpc_release = nfs41_sequence_release, |
fc01cea9 AA |
5093 | }; |
5094 | ||
5095 | static int nfs41_proc_async_sequence(struct nfs_client *clp, | |
5096 | struct rpc_cred *cred) | |
5097 | { | |
5098 | struct nfs4_sequence_args *args; | |
5099 | struct nfs4_sequence_res *res; | |
5100 | struct rpc_message msg = { | |
5101 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], | |
5102 | .rpc_cred = cred, | |
5103 | }; | |
5104 | ||
7135840f AB |
5105 | if (!atomic_inc_not_zero(&clp->cl_count)) |
5106 | return -EIO; | |
fc01cea9 | 5107 | args = kzalloc(sizeof(*args), GFP_KERNEL); |
fc01cea9 | 5108 | res = kzalloc(sizeof(*res), GFP_KERNEL); |
7135840f | 5109 | if (!args || !res) { |
fc01cea9 | 5110 | kfree(args); |
7dd08a57 | 5111 | kfree(res); |
7135840f | 5112 | nfs_put_client(clp); |
fc01cea9 AA |
5113 | return -ENOMEM; |
5114 | } | |
5115 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
5116 | msg.rpc_argp = args; | |
5117 | msg.rpc_resp = res; | |
5118 | ||
5119 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
5120 | &nfs41_sequence_ops, (void *)clp); | |
5121 | } | |
5122 | ||
fce5c838 RL |
5123 | struct nfs4_reclaim_complete_data { |
5124 | struct nfs_client *clp; | |
5125 | struct nfs41_reclaim_complete_args arg; | |
5126 | struct nfs41_reclaim_complete_res res; | |
5127 | }; | |
5128 | ||
5129 | static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) | |
5130 | { | |
5131 | struct nfs4_reclaim_complete_data *calldata = data; | |
5132 | ||
b257957e | 5133 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); |
fce5c838 RL |
5134 | if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args, |
5135 | &calldata->res.seq_res, 0, task)) | |
5136 | return; | |
5137 | ||
5138 | rpc_call_start(task); | |
5139 | } | |
5140 | ||
5141 | static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) | |
5142 | { | |
5143 | struct nfs4_reclaim_complete_data *calldata = data; | |
5144 | struct nfs_client *clp = calldata->clp; | |
5145 | struct nfs4_sequence_res *res = &calldata->res.seq_res; | |
5146 | ||
5147 | dprintk("--> %s\n", __func__); | |
5148 | nfs41_sequence_done(clp, res, task->tk_status); | |
5149 | switch (task->tk_status) { | |
5150 | case 0: | |
5151 | case -NFS4ERR_COMPLETE_ALREADY: | |
5152 | break; | |
5153 | case -NFS4ERR_BADSESSION: | |
5154 | case -NFS4ERR_DEADSESSION: | |
5155 | /* | |
5156 | * Handle the session error, but do not retry the operation, as | |
5157 | * we have no way of telling whether the clientid had to be | |
5158 | * reset before we got our reply. If reset, a new wave of | |
5159 | * reclaim operations will follow, containing their own reclaim | |
5160 | * complete. We don't want our retry to get on the way of | |
5161 | * recovery by incorrectly indicating to the server that we're | |
5162 | * done reclaiming state since the process had to be restarted. | |
5163 | */ | |
5164 | _nfs4_async_handle_error(task, NULL, clp, NULL); | |
5165 | break; | |
5166 | default: | |
5167 | if (_nfs4_async_handle_error( | |
5168 | task, NULL, clp, NULL) == -EAGAIN) { | |
5169 | rpc_restart_call_prepare(task); | |
5170 | return; | |
5171 | } | |
5172 | } | |
fce5c838 RL |
5173 | |
5174 | dprintk("<-- %s\n", __func__); | |
5175 | } | |
5176 | ||
5177 | static void nfs4_free_reclaim_complete_data(void *data) | |
5178 | { | |
5179 | struct nfs4_reclaim_complete_data *calldata = data; | |
5180 | ||
5181 | kfree(calldata); | |
5182 | } | |
5183 | ||
5184 | static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { | |
5185 | .rpc_call_prepare = nfs4_reclaim_complete_prepare, | |
5186 | .rpc_call_done = nfs4_reclaim_complete_done, | |
5187 | .rpc_release = nfs4_free_reclaim_complete_data, | |
5188 | }; | |
5189 | ||
5190 | /* | |
5191 | * Issue a global reclaim complete. | |
5192 | */ | |
5193 | static int nfs41_proc_reclaim_complete(struct nfs_client *clp) | |
5194 | { | |
5195 | struct nfs4_reclaim_complete_data *calldata; | |
5196 | struct rpc_task *task; | |
5197 | struct rpc_message msg = { | |
5198 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], | |
5199 | }; | |
5200 | struct rpc_task_setup task_setup_data = { | |
5201 | .rpc_client = clp->cl_rpcclient, | |
5202 | .rpc_message = &msg, | |
5203 | .callback_ops = &nfs4_reclaim_complete_call_ops, | |
5204 | .flags = RPC_TASK_ASYNC, | |
5205 | }; | |
5206 | int status = -ENOMEM; | |
5207 | ||
5208 | dprintk("--> %s\n", __func__); | |
5209 | calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); | |
5210 | if (calldata == NULL) | |
5211 | goto out; | |
5212 | calldata->clp = clp; | |
5213 | calldata->arg.one_fs = 0; | |
5214 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
5215 | ||
5216 | msg.rpc_argp = &calldata->arg; | |
5217 | msg.rpc_resp = &calldata->res; | |
5218 | task_setup_data.callback_data = calldata; | |
5219 | task = rpc_run_task(&task_setup_data); | |
5220 | if (IS_ERR(task)) | |
5221 | status = PTR_ERR(task); | |
5222 | rpc_put_task(task); | |
5223 | out: | |
5224 | dprintk("<-- %s status=%d\n", __func__, status); | |
5225 | return status; | |
5226 | } | |
557134a3 AA |
5227 | #endif /* CONFIG_NFS_V4_1 */ |
5228 | ||
591d71cb | 5229 | struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { |
7eff03ae | 5230 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 5231 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
5232 | .recover_open = nfs4_open_reclaim, |
5233 | .recover_lock = nfs4_lock_reclaim, | |
591d71cb | 5234 | .establish_clid = nfs4_init_clientid, |
90a16617 | 5235 | .get_clid_cred = nfs4_get_setclientid_cred, |
1da177e4 LT |
5236 | }; |
5237 | ||
591d71cb AA |
5238 | #if defined(CONFIG_NFS_V4_1) |
5239 | struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { | |
5240 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, | |
5241 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, | |
5242 | .recover_open = nfs4_open_reclaim, | |
5243 | .recover_lock = nfs4_lock_reclaim, | |
4d643d1d | 5244 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5245 | .get_clid_cred = nfs4_get_exchange_id_cred, |
fce5c838 | 5246 | .reclaim_complete = nfs41_proc_reclaim_complete, |
591d71cb AA |
5247 | }; |
5248 | #endif /* CONFIG_NFS_V4_1 */ | |
5249 | ||
5250 | struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { | |
5251 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, | |
5252 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, | |
5253 | .recover_open = nfs4_open_expired, | |
5254 | .recover_lock = nfs4_lock_expired, | |
5255 | .establish_clid = nfs4_init_clientid, | |
90a16617 | 5256 | .get_clid_cred = nfs4_get_setclientid_cred, |
591d71cb AA |
5257 | }; |
5258 | ||
5259 | #if defined(CONFIG_NFS_V4_1) | |
5260 | struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { | |
7eff03ae | 5261 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 5262 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
5263 | .recover_open = nfs4_open_expired, |
5264 | .recover_lock = nfs4_lock_expired, | |
4d643d1d | 5265 | .establish_clid = nfs41_init_clientid, |
b4b82607 | 5266 | .get_clid_cred = nfs4_get_exchange_id_cred, |
1da177e4 | 5267 | }; |
591d71cb | 5268 | #endif /* CONFIG_NFS_V4_1 */ |
1da177e4 | 5269 | |
29fba38b BH |
5270 | struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { |
5271 | .sched_state_renewal = nfs4_proc_async_renew, | |
a7b72103 | 5272 | .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, |
8e69514f | 5273 | .renew_lease = nfs4_proc_renew, |
29fba38b BH |
5274 | }; |
5275 | ||
5276 | #if defined(CONFIG_NFS_V4_1) | |
5277 | struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { | |
5278 | .sched_state_renewal = nfs41_proc_async_sequence, | |
a7b72103 | 5279 | .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, |
8e69514f | 5280 | .renew_lease = nfs4_proc_sequence, |
29fba38b BH |
5281 | }; |
5282 | #endif | |
5283 | ||
5284 | /* | |
5285 | * Per minor version reboot and network partition recovery ops | |
5286 | */ | |
5287 | ||
591d71cb AA |
5288 | struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = { |
5289 | &nfs40_reboot_recovery_ops, | |
5290 | #if defined(CONFIG_NFS_V4_1) | |
5291 | &nfs41_reboot_recovery_ops, | |
5292 | #endif | |
5293 | }; | |
5294 | ||
5295 | struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = { | |
5296 | &nfs40_nograce_recovery_ops, | |
5297 | #if defined(CONFIG_NFS_V4_1) | |
5298 | &nfs41_nograce_recovery_ops, | |
5299 | #endif | |
5300 | }; | |
5301 | ||
29fba38b BH |
5302 | struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = { |
5303 | &nfs40_state_renewal_ops, | |
5304 | #if defined(CONFIG_NFS_V4_1) | |
5305 | &nfs41_state_renewal_ops, | |
5306 | #endif | |
5307 | }; | |
5308 | ||
92e1d5be | 5309 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
5310 | .permission = nfs_permission, |
5311 | .getattr = nfs_getattr, | |
5312 | .setattr = nfs_setattr, | |
5313 | .getxattr = nfs4_getxattr, | |
5314 | .setxattr = nfs4_setxattr, | |
5315 | .listxattr = nfs4_listxattr, | |
5316 | }; | |
5317 | ||
509de811 | 5318 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
5319 | .version = 4, /* protocol version */ |
5320 | .dentry_ops = &nfs4_dentry_operations, | |
5321 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 5322 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
5323 | .getroot = nfs4_proc_get_root, |
5324 | .getattr = nfs4_proc_getattr, | |
5325 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 5326 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
5327 | .lookup = nfs4_proc_lookup, |
5328 | .access = nfs4_proc_access, | |
5329 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
5330 | .create = nfs4_proc_create, |
5331 | .remove = nfs4_proc_remove, | |
5332 | .unlink_setup = nfs4_proc_unlink_setup, | |
5333 | .unlink_done = nfs4_proc_unlink_done, | |
5334 | .rename = nfs4_proc_rename, | |
5335 | .link = nfs4_proc_link, | |
5336 | .symlink = nfs4_proc_symlink, | |
5337 | .mkdir = nfs4_proc_mkdir, | |
5338 | .rmdir = nfs4_proc_remove, | |
5339 | .readdir = nfs4_proc_readdir, | |
5340 | .mknod = nfs4_proc_mknod, | |
5341 | .statfs = nfs4_proc_statfs, | |
5342 | .fsinfo = nfs4_proc_fsinfo, | |
5343 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 5344 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
5345 | .decode_dirent = nfs4_decode_dirent, |
5346 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 5347 | .read_done = nfs4_read_done, |
1da177e4 | 5348 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 5349 | .write_done = nfs4_write_done, |
1da177e4 | 5350 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 5351 | .commit_done = nfs4_commit_done, |
1da177e4 | 5352 | .lock = nfs4_proc_lock, |
e50a1c2e | 5353 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 5354 | .close_context = nfs4_close_context, |
1da177e4 LT |
5355 | }; |
5356 | ||
5357 | /* | |
5358 | * Local variables: | |
5359 | * c-basic-offset: 8 | |
5360 | * End: | |
5361 | */ |