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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4proc.c | |
3 | * | |
4 | * Client-side procedure declarations for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * Andy Adamson <andros@umich.edu> | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. Neither the name of the University nor the names of its | |
22 | * contributors may be used to endorse or promote products derived | |
23 | * from this software without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
26 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
27 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
28 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
32 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
33 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
34 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
35 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
36 | */ | |
37 | ||
38 | #include <linux/mm.h> | |
39 | #include <linux/utsname.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/string.h> | |
43 | #include <linux/sunrpc/clnt.h> | |
44 | #include <linux/nfs.h> | |
45 | #include <linux/nfs4.h> | |
46 | #include <linux/nfs_fs.h> | |
47 | #include <linux/nfs_page.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/namei.h> | |
02a913a7 | 50 | #include <linux/mount.h> |
99fe60d0 | 51 | #include <linux/module.h> |
1da177e4 | 52 | |
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 | 54 | #include "delegation.h" |
101070ca | 55 | #include "internal.h" |
006ea73e | 56 | #include "iostat.h" |
1da177e4 LT |
57 | |
58 | #define NFSDBG_FACILITY NFSDBG_PROC | |
59 | ||
2066fe89 | 60 | #define NFS4_POLL_RETRY_MIN (HZ/10) |
1da177e4 LT |
61 | #define NFS4_POLL_RETRY_MAX (15*HZ) |
62 | ||
cdd4e68b | 63 | struct nfs4_opendata; |
864472e9 | 64 | static int _nfs4_proc_open(struct nfs4_opendata *data); |
1da177e4 | 65 | static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); |
9e33bed5 | 66 | static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); |
9936781d TM |
67 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr); |
68 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr); | |
1da177e4 | 69 | |
1da177e4 | 70 | /* Prevent leaks of NFSv4 errors into userland */ |
46f72f57 | 71 | static int nfs4_map_errors(int err) |
1da177e4 LT |
72 | { |
73 | if (err < -1000) { | |
74 | dprintk("%s could not handle NFSv4 error %d\n", | |
3110ff80 | 75 | __func__, -err); |
1da177e4 LT |
76 | return -EIO; |
77 | } | |
78 | return err; | |
79 | } | |
80 | ||
81 | /* | |
82 | * This is our standard bitmap for GETATTR requests. | |
83 | */ | |
84 | const u32 nfs4_fattr_bitmap[2] = { | |
85 | FATTR4_WORD0_TYPE | |
86 | | FATTR4_WORD0_CHANGE | |
87 | | FATTR4_WORD0_SIZE | |
88 | | FATTR4_WORD0_FSID | |
89 | | FATTR4_WORD0_FILEID, | |
90 | FATTR4_WORD1_MODE | |
91 | | FATTR4_WORD1_NUMLINKS | |
92 | | FATTR4_WORD1_OWNER | |
93 | | FATTR4_WORD1_OWNER_GROUP | |
94 | | FATTR4_WORD1_RAWDEV | |
95 | | FATTR4_WORD1_SPACE_USED | |
96 | | FATTR4_WORD1_TIME_ACCESS | |
97 | | FATTR4_WORD1_TIME_METADATA | |
98 | | FATTR4_WORD1_TIME_MODIFY | |
99 | }; | |
100 | ||
101 | const u32 nfs4_statfs_bitmap[2] = { | |
102 | FATTR4_WORD0_FILES_AVAIL | |
103 | | FATTR4_WORD0_FILES_FREE | |
104 | | FATTR4_WORD0_FILES_TOTAL, | |
105 | FATTR4_WORD1_SPACE_AVAIL | |
106 | | FATTR4_WORD1_SPACE_FREE | |
107 | | FATTR4_WORD1_SPACE_TOTAL | |
108 | }; | |
109 | ||
4ce79717 | 110 | const u32 nfs4_pathconf_bitmap[2] = { |
1da177e4 LT |
111 | FATTR4_WORD0_MAXLINK |
112 | | FATTR4_WORD0_MAXNAME, | |
113 | 0 | |
114 | }; | |
115 | ||
116 | const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE | |
117 | | FATTR4_WORD0_MAXREAD | |
118 | | FATTR4_WORD0_MAXWRITE | |
119 | | FATTR4_WORD0_LEASE_TIME, | |
120 | 0 | |
121 | }; | |
122 | ||
830b8e33 MN |
123 | const u32 nfs4_fs_locations_bitmap[2] = { |
124 | FATTR4_WORD0_TYPE | |
125 | | FATTR4_WORD0_CHANGE | |
126 | | FATTR4_WORD0_SIZE | |
127 | | FATTR4_WORD0_FSID | |
128 | | FATTR4_WORD0_FILEID | |
129 | | FATTR4_WORD0_FS_LOCATIONS, | |
130 | FATTR4_WORD1_MODE | |
131 | | FATTR4_WORD1_NUMLINKS | |
132 | | FATTR4_WORD1_OWNER | |
133 | | FATTR4_WORD1_OWNER_GROUP | |
134 | | FATTR4_WORD1_RAWDEV | |
135 | | FATTR4_WORD1_SPACE_USED | |
136 | | FATTR4_WORD1_TIME_ACCESS | |
137 | | FATTR4_WORD1_TIME_METADATA | |
138 | | FATTR4_WORD1_TIME_MODIFY | |
139 | | FATTR4_WORD1_MOUNTED_ON_FILEID | |
140 | }; | |
141 | ||
bc4785cd | 142 | static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, |
1da177e4 LT |
143 | struct nfs4_readdir_arg *readdir) |
144 | { | |
0dbb4c67 | 145 | __be32 *start, *p; |
1da177e4 LT |
146 | |
147 | BUG_ON(readdir->count < 80); | |
148 | if (cookie > 2) { | |
b7ef1956 | 149 | readdir->cookie = cookie; |
1da177e4 LT |
150 | memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); |
151 | return; | |
152 | } | |
153 | ||
154 | readdir->cookie = 0; | |
155 | memset(&readdir->verifier, 0, sizeof(readdir->verifier)); | |
156 | if (cookie == 2) | |
157 | return; | |
158 | ||
159 | /* | |
160 | * NFSv4 servers do not return entries for '.' and '..' | |
161 | * Therefore, we fake these entries here. We let '.' | |
162 | * have cookie 0 and '..' have cookie 1. Note that | |
163 | * when talking to the server, we always send cookie 0 | |
164 | * instead of 1 or 2. | |
165 | */ | |
0dbb4c67 | 166 | start = p = kmap_atomic(*readdir->pages, KM_USER0); |
1da177e4 LT |
167 | |
168 | if (cookie == 0) { | |
169 | *p++ = xdr_one; /* next */ | |
170 | *p++ = xdr_zero; /* cookie, first word */ | |
171 | *p++ = xdr_one; /* cookie, second word */ | |
172 | *p++ = xdr_one; /* entry len */ | |
173 | memcpy(p, ".\0\0\0", 4); /* entry */ | |
174 | p++; | |
175 | *p++ = xdr_one; /* bitmap length */ | |
176 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
177 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 178 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); |
1da177e4 LT |
179 | } |
180 | ||
181 | *p++ = xdr_one; /* next */ | |
182 | *p++ = xdr_zero; /* cookie, first word */ | |
183 | *p++ = xdr_two; /* cookie, second word */ | |
184 | *p++ = xdr_two; /* entry len */ | |
185 | memcpy(p, "..\0\0", 4); /* entry */ | |
186 | p++; | |
187 | *p++ = xdr_one; /* bitmap length */ | |
188 | *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ | |
189 | *p++ = htonl(8); /* attribute buffer length */ | |
4e769b93 | 190 | p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); |
1da177e4 LT |
191 | |
192 | readdir->pgbase = (char *)p - (char *)start; | |
193 | readdir->count -= readdir->pgbase; | |
194 | kunmap_atomic(start, KM_USER0); | |
195 | } | |
196 | ||
65de872e TM |
197 | static int nfs4_wait_clnt_recover(struct nfs_client *clp) |
198 | { | |
199 | int res; | |
200 | ||
201 | might_sleep(); | |
202 | ||
e005e804 | 203 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
72cb77f4 | 204 | nfs_wait_bit_killable, TASK_KILLABLE); |
65de872e TM |
205 | return res; |
206 | } | |
207 | ||
208 | static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) | |
209 | { | |
210 | int res = 0; | |
211 | ||
212 | might_sleep(); | |
213 | ||
214 | if (*timeout <= 0) | |
215 | *timeout = NFS4_POLL_RETRY_MIN; | |
216 | if (*timeout > NFS4_POLL_RETRY_MAX) | |
217 | *timeout = NFS4_POLL_RETRY_MAX; | |
218 | schedule_timeout_killable(*timeout); | |
219 | if (fatal_signal_pending(current)) | |
220 | res = -ERESTARTSYS; | |
221 | *timeout <<= 1; | |
222 | return res; | |
223 | } | |
224 | ||
225 | /* This is the error handling routine for processes that are allowed | |
226 | * to sleep. | |
227 | */ | |
228 | static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception) | |
229 | { | |
230 | struct nfs_client *clp = server->nfs_client; | |
9e33bed5 | 231 | struct nfs4_state *state = exception->state; |
65de872e TM |
232 | int ret = errorcode; |
233 | ||
234 | exception->retry = 0; | |
235 | switch(errorcode) { | |
236 | case 0: | |
237 | return 0; | |
9e33bed5 TM |
238 | case -NFS4ERR_ADMIN_REVOKED: |
239 | case -NFS4ERR_BAD_STATEID: | |
240 | case -NFS4ERR_OPENMODE: | |
241 | if (state == NULL) | |
242 | break; | |
243 | nfs4_state_mark_reclaim_nograce(clp, state); | |
65de872e TM |
244 | case -NFS4ERR_STALE_CLIENTID: |
245 | case -NFS4ERR_STALE_STATEID: | |
246 | case -NFS4ERR_EXPIRED: | |
247 | nfs4_schedule_state_recovery(clp); | |
248 | ret = nfs4_wait_clnt_recover(clp); | |
249 | if (ret == 0) | |
250 | exception->retry = 1; | |
251 | break; | |
252 | case -NFS4ERR_FILE_OPEN: | |
253 | case -NFS4ERR_GRACE: | |
254 | case -NFS4ERR_DELAY: | |
255 | ret = nfs4_delay(server->client, &exception->timeout); | |
256 | if (ret != 0) | |
257 | break; | |
258 | case -NFS4ERR_OLD_STATEID: | |
259 | exception->retry = 1; | |
260 | } | |
261 | /* We failed to handle the error */ | |
262 | return nfs4_map_errors(ret); | |
263 | } | |
264 | ||
265 | ||
26e976a8 | 266 | static void renew_lease(const struct nfs_server *server, unsigned long timestamp) |
1da177e4 | 267 | { |
7539bbab | 268 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
269 | spin_lock(&clp->cl_lock); |
270 | if (time_before(clp->cl_last_renewal,timestamp)) | |
271 | clp->cl_last_renewal = timestamp; | |
272 | spin_unlock(&clp->cl_lock); | |
273 | } | |
274 | ||
cccef3b9 AA |
275 | #if defined(CONFIG_NFS_V4_1) |
276 | ||
e2c4ab3c AA |
277 | /* |
278 | * nfs4_free_slot - free a slot and efficiently update slot table. | |
279 | * | |
280 | * freeing a slot is trivially done by clearing its respective bit | |
281 | * in the bitmap. | |
282 | * If the freed slotid equals highest_used_slotid we want to update it | |
283 | * so that the server would be able to size down the slot table if needed, | |
284 | * otherwise we know that the highest_used_slotid is still in use. | |
285 | * When updating highest_used_slotid there may be "holes" in the bitmap | |
286 | * so we need to scan down from highest_used_slotid to 0 looking for the now | |
287 | * highest slotid in use. | |
288 | * If none found, highest_used_slotid is set to -1. | |
289 | */ | |
290 | static void | |
291 | nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid) | |
292 | { | |
293 | int slotid = free_slotid; | |
294 | ||
295 | spin_lock(&tbl->slot_tbl_lock); | |
296 | /* clear used bit in bitmap */ | |
297 | __clear_bit(slotid, tbl->used_slots); | |
298 | ||
299 | /* update highest_used_slotid when it is freed */ | |
300 | if (slotid == tbl->highest_used_slotid) { | |
301 | slotid = find_last_bit(tbl->used_slots, tbl->max_slots); | |
302 | if (slotid >= 0 && slotid < tbl->max_slots) | |
303 | tbl->highest_used_slotid = slotid; | |
304 | else | |
305 | tbl->highest_used_slotid = -1; | |
306 | } | |
307 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
308 | spin_unlock(&tbl->slot_tbl_lock); | |
309 | dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__, | |
310 | free_slotid, tbl->highest_used_slotid); | |
311 | } | |
312 | ||
13615871 AA |
313 | void nfs41_sequence_free_slot(const struct nfs_client *clp, |
314 | struct nfs4_sequence_res *res) | |
315 | { | |
316 | struct nfs4_slot_table *tbl; | |
317 | ||
318 | if (!nfs4_has_session(clp)) { | |
319 | dprintk("%s: No session\n", __func__); | |
320 | return; | |
321 | } | |
322 | tbl = &clp->cl_session->fc_slot_table; | |
323 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) { | |
324 | dprintk("%s: No slot\n", __func__); | |
325 | /* just wake up the next guy waiting since | |
326 | * we may have not consumed a slot after all */ | |
327 | rpc_wake_up_next(&tbl->slot_tbl_waitq); | |
328 | return; | |
329 | } | |
330 | nfs4_free_slot(tbl, res->sr_slotid); | |
331 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
332 | } | |
333 | ||
b0df806c AA |
334 | static void nfs41_sequence_done(struct nfs_client *clp, |
335 | struct nfs4_sequence_res *res, | |
336 | int rpc_status) | |
337 | { | |
338 | unsigned long timestamp; | |
339 | struct nfs4_slot_table *tbl; | |
340 | struct nfs4_slot *slot; | |
341 | ||
342 | /* | |
343 | * sr_status remains 1 if an RPC level error occurred. The server | |
344 | * may or may not have processed the sequence operation.. | |
345 | * Proceed as if the server received and processed the sequence | |
346 | * operation. | |
347 | */ | |
348 | if (res->sr_status == 1) | |
349 | res->sr_status = NFS_OK; | |
350 | ||
351 | /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */ | |
352 | if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) | |
353 | goto out; | |
354 | ||
355 | tbl = &clp->cl_session->fc_slot_table; | |
356 | slot = tbl->slots + res->sr_slotid; | |
357 | ||
358 | if (res->sr_status == 0) { | |
359 | /* Update the slot's sequence and clientid lease timer */ | |
360 | ++slot->seq_nr; | |
361 | timestamp = res->sr_renewal_time; | |
362 | spin_lock(&clp->cl_lock); | |
363 | if (time_before(clp->cl_last_renewal, timestamp)) | |
364 | clp->cl_last_renewal = timestamp; | |
365 | spin_unlock(&clp->cl_lock); | |
366 | return; | |
367 | } | |
368 | out: | |
369 | /* The session may be reset by one of the error handlers. */ | |
370 | dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); | |
371 | nfs41_sequence_free_slot(clp, res); | |
372 | } | |
373 | ||
510b8175 BH |
374 | /* |
375 | * nfs4_find_slot - efficiently look for a free slot | |
376 | * | |
377 | * nfs4_find_slot looks for an unset bit in the used_slots bitmap. | |
378 | * If found, we mark the slot as used, update the highest_used_slotid, | |
379 | * and respectively set up the sequence operation args. | |
380 | * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise. | |
fbcd4abc AA |
381 | * |
382 | * Note: must be called with under the slot_tbl_lock. | |
510b8175 BH |
383 | */ |
384 | static u8 | |
385 | nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task) | |
386 | { | |
387 | int slotid; | |
388 | u8 ret_id = NFS4_MAX_SLOT_TABLE; | |
389 | BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE); | |
390 | ||
510b8175 BH |
391 | dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n", |
392 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, | |
393 | tbl->max_slots); | |
394 | slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots); | |
395 | if (slotid >= tbl->max_slots) | |
396 | goto out; | |
397 | __set_bit(slotid, tbl->used_slots); | |
398 | if (slotid > tbl->highest_used_slotid) | |
399 | tbl->highest_used_slotid = slotid; | |
400 | ret_id = slotid; | |
401 | out: | |
402 | dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n", | |
403 | __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id); | |
510b8175 BH |
404 | return ret_id; |
405 | } | |
406 | ||
ce5039c1 AA |
407 | static int nfs41_setup_sequence(struct nfs4_session *session, |
408 | struct nfs4_sequence_args *args, | |
409 | struct nfs4_sequence_res *res, | |
410 | int cache_reply, | |
411 | struct rpc_task *task) | |
412 | { | |
fbcd4abc AA |
413 | struct nfs4_slot *slot; |
414 | struct nfs4_slot_table *tbl; | |
415 | u8 slotid; | |
416 | ||
417 | dprintk("--> %s\n", __func__); | |
ce5039c1 AA |
418 | /* slot already allocated? */ |
419 | if (res->sr_slotid != NFS4_MAX_SLOT_TABLE) | |
420 | return 0; | |
421 | ||
422 | memset(res, 0, sizeof(*res)); | |
423 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
fbcd4abc AA |
424 | tbl = &session->fc_slot_table; |
425 | ||
426 | spin_lock(&tbl->slot_tbl_lock); | |
427 | slotid = nfs4_find_slot(tbl, task); | |
428 | if (slotid == NFS4_MAX_SLOT_TABLE) { | |
429 | rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); | |
430 | spin_unlock(&tbl->slot_tbl_lock); | |
431 | dprintk("<-- %s: no free slots\n", __func__); | |
432 | return -EAGAIN; | |
433 | } | |
434 | spin_unlock(&tbl->slot_tbl_lock); | |
435 | ||
436 | slot = tbl->slots + slotid; | |
99fe60d0 | 437 | args->sa_session = session; |
fbcd4abc AA |
438 | args->sa_slotid = slotid; |
439 | args->sa_cache_this = cache_reply; | |
440 | ||
441 | dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr); | |
442 | ||
99fe60d0 | 443 | res->sr_session = session; |
fbcd4abc AA |
444 | res->sr_slotid = slotid; |
445 | res->sr_renewal_time = jiffies; | |
446 | /* | |
447 | * sr_status is only set in decode_sequence, and so will remain | |
448 | * set to 1 if an rpc level failure occurs. | |
449 | */ | |
450 | res->sr_status = 1; | |
ce5039c1 AA |
451 | return 0; |
452 | } | |
453 | ||
454 | int nfs4_setup_sequence(struct nfs_client *clp, | |
455 | struct nfs4_sequence_args *args, | |
456 | struct nfs4_sequence_res *res, | |
457 | int cache_reply, | |
458 | struct rpc_task *task) | |
459 | { | |
460 | int ret = 0; | |
461 | ||
462 | dprintk("--> %s clp %p session %p sr_slotid %d\n", | |
463 | __func__, clp, clp->cl_session, res->sr_slotid); | |
464 | ||
465 | if (!nfs4_has_session(clp)) | |
466 | goto out; | |
467 | ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply, | |
468 | task); | |
469 | if (ret != -EAGAIN) { | |
470 | /* terminate rpc task */ | |
471 | task->tk_status = ret; | |
472 | task->tk_action = NULL; | |
473 | } | |
474 | out: | |
475 | dprintk("<-- %s status=%d\n", __func__, ret); | |
476 | return ret; | |
477 | } | |
478 | ||
479 | struct nfs41_call_sync_data { | |
480 | struct nfs_client *clp; | |
481 | struct nfs4_sequence_args *seq_args; | |
482 | struct nfs4_sequence_res *seq_res; | |
483 | int cache_reply; | |
484 | }; | |
485 | ||
486 | static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) | |
487 | { | |
488 | struct nfs41_call_sync_data *data = calldata; | |
489 | ||
490 | dprintk("--> %s data->clp->cl_session %p\n", __func__, | |
491 | data->clp->cl_session); | |
492 | if (nfs4_setup_sequence(data->clp, data->seq_args, | |
493 | data->seq_res, data->cache_reply, task)) | |
494 | return; | |
495 | rpc_call_start(task); | |
496 | } | |
497 | ||
69ab40c4 AA |
498 | static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) |
499 | { | |
500 | struct nfs41_call_sync_data *data = calldata; | |
501 | ||
502 | nfs41_sequence_done(data->clp, data->seq_res, task->tk_status); | |
503 | nfs41_sequence_free_slot(data->clp, data->seq_res); | |
504 | } | |
505 | ||
ce5039c1 AA |
506 | struct rpc_call_ops nfs41_call_sync_ops = { |
507 | .rpc_call_prepare = nfs41_call_sync_prepare, | |
69ab40c4 | 508 | .rpc_call_done = nfs41_call_sync_done, |
ce5039c1 AA |
509 | }; |
510 | ||
511 | static int nfs4_call_sync_sequence(struct nfs_client *clp, | |
512 | struct rpc_clnt *clnt, | |
513 | struct rpc_message *msg, | |
514 | struct nfs4_sequence_args *args, | |
515 | struct nfs4_sequence_res *res, | |
516 | int cache_reply) | |
517 | { | |
518 | int ret; | |
519 | struct rpc_task *task; | |
520 | struct nfs41_call_sync_data data = { | |
521 | .clp = clp, | |
522 | .seq_args = args, | |
523 | .seq_res = res, | |
524 | .cache_reply = cache_reply, | |
525 | }; | |
526 | struct rpc_task_setup task_setup = { | |
527 | .rpc_client = clnt, | |
528 | .rpc_message = msg, | |
529 | .callback_ops = &nfs41_call_sync_ops, | |
530 | .callback_data = &data | |
531 | }; | |
532 | ||
533 | res->sr_slotid = NFS4_MAX_SLOT_TABLE; | |
534 | task = rpc_run_task(&task_setup); | |
535 | if (IS_ERR(task)) | |
536 | ret = PTR_ERR(task); | |
537 | else { | |
538 | ret = task->tk_status; | |
539 | rpc_put_task(task); | |
540 | } | |
541 | return ret; | |
542 | } | |
543 | ||
cccef3b9 AA |
544 | int _nfs4_call_sync_session(struct nfs_server *server, |
545 | struct rpc_message *msg, | |
546 | struct nfs4_sequence_args *args, | |
547 | struct nfs4_sequence_res *res, | |
548 | int cache_reply) | |
549 | { | |
ce5039c1 AA |
550 | return nfs4_call_sync_sequence(server->nfs_client, server->client, |
551 | msg, args, res, cache_reply); | |
cccef3b9 AA |
552 | } |
553 | ||
554 | #endif /* CONFIG_NFS_V4_1 */ | |
555 | ||
556 | int _nfs4_call_sync(struct nfs_server *server, | |
557 | struct rpc_message *msg, | |
558 | struct nfs4_sequence_args *args, | |
559 | struct nfs4_sequence_res *res, | |
560 | int cache_reply) | |
561 | { | |
f3752975 | 562 | args->sa_session = res->sr_session = NULL; |
cccef3b9 AA |
563 | return rpc_call_sync(server->client, msg, 0); |
564 | } | |
565 | ||
566 | #define nfs4_call_sync(server, msg, args, res, cache_reply) \ | |
567 | (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \ | |
568 | &(res)->seq_res, (cache_reply)) | |
569 | ||
b0df806c AA |
570 | static void nfs4_sequence_done(const struct nfs_server *server, |
571 | struct nfs4_sequence_res *res, int rpc_status) | |
572 | { | |
573 | #ifdef CONFIG_NFS_V4_1 | |
574 | if (nfs4_has_session(server->nfs_client)) | |
575 | nfs41_sequence_done(server->nfs_client, res, rpc_status); | |
576 | #endif /* CONFIG_NFS_V4_1 */ | |
577 | } | |
578 | ||
579 | /* no restart, therefore free slot here */ | |
580 | static void nfs4_sequence_done_free_slot(const struct nfs_server *server, | |
581 | struct nfs4_sequence_res *res, | |
582 | int rpc_status) | |
583 | { | |
584 | nfs4_sequence_done(server, res, rpc_status); | |
585 | nfs4_sequence_free_slot(server->nfs_client, res); | |
586 | } | |
587 | ||
38478b24 | 588 | static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) |
1da177e4 | 589 | { |
38478b24 | 590 | struct nfs_inode *nfsi = NFS_I(dir); |
1da177e4 | 591 | |
38478b24 | 592 | spin_lock(&dir->i_lock); |
40d24704 TM |
593 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA; |
594 | if (!cinfo->atomic || cinfo->before != nfsi->change_attr) | |
bfc69a45 | 595 | nfs_force_lookup_revalidate(dir); |
40d24704 | 596 | nfsi->change_attr = cinfo->after; |
38478b24 | 597 | spin_unlock(&dir->i_lock); |
1da177e4 LT |
598 | } |
599 | ||
e56e0b78 | 600 | struct nfs4_opendata { |
c6d00e63 | 601 | struct kref kref; |
e56e0b78 TM |
602 | struct nfs_openargs o_arg; |
603 | struct nfs_openres o_res; | |
cdd4e68b TM |
604 | struct nfs_open_confirmargs c_arg; |
605 | struct nfs_open_confirmres c_res; | |
e56e0b78 TM |
606 | struct nfs_fattr f_attr; |
607 | struct nfs_fattr dir_attr; | |
ad389da7 | 608 | struct path path; |
e56e0b78 TM |
609 | struct dentry *dir; |
610 | struct nfs4_state_owner *owner; | |
aac00a8d | 611 | struct nfs4_state *state; |
e56e0b78 | 612 | struct iattr attrs; |
26e976a8 | 613 | unsigned long timestamp; |
3e309914 | 614 | unsigned int rpc_done : 1; |
24ac23ab TM |
615 | int rpc_status; |
616 | int cancelled; | |
e56e0b78 TM |
617 | }; |
618 | ||
2ced46c2 TM |
619 | |
620 | static void nfs4_init_opendata_res(struct nfs4_opendata *p) | |
621 | { | |
622 | p->o_res.f_attr = &p->f_attr; | |
623 | p->o_res.dir_attr = &p->dir_attr; | |
c1d51931 TM |
624 | p->o_res.seqid = p->o_arg.seqid; |
625 | p->c_res.seqid = p->c_arg.seqid; | |
2ced46c2 TM |
626 | p->o_res.server = p->o_arg.server; |
627 | nfs_fattr_init(&p->f_attr); | |
628 | nfs_fattr_init(&p->dir_attr); | |
629 | } | |
630 | ||
ad389da7 | 631 | static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path, |
dc0b027d | 632 | struct nfs4_state_owner *sp, fmode_t fmode, int flags, |
e56e0b78 TM |
633 | const struct iattr *attrs) |
634 | { | |
ad389da7 | 635 | struct dentry *parent = dget_parent(path->dentry); |
e56e0b78 TM |
636 | struct inode *dir = parent->d_inode; |
637 | struct nfs_server *server = NFS_SERVER(dir); | |
638 | struct nfs4_opendata *p; | |
639 | ||
640 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
641 | if (p == NULL) | |
642 | goto err; | |
643 | p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid); | |
644 | if (p->o_arg.seqid == NULL) | |
645 | goto err_free; | |
ad389da7 TM |
646 | p->path.mnt = mntget(path->mnt); |
647 | p->path.dentry = dget(path->dentry); | |
e56e0b78 TM |
648 | p->dir = parent; |
649 | p->owner = sp; | |
650 | atomic_inc(&sp->so_count); | |
651 | p->o_arg.fh = NFS_FH(dir); | |
dc0b027d TM |
652 | p->o_arg.open_flags = flags; |
653 | p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); | |
7539bbab | 654 | p->o_arg.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 655 | p->o_arg.id = sp->so_owner_id.id; |
ad389da7 | 656 | p->o_arg.name = &p->path.dentry->d_name; |
e56e0b78 TM |
657 | p->o_arg.server = server; |
658 | p->o_arg.bitmask = server->attr_bitmask; | |
659 | p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; | |
5f7dbd5c | 660 | p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
e56e0b78 TM |
661 | if (flags & O_EXCL) { |
662 | u32 *s = (u32 *) p->o_arg.u.verifier.data; | |
663 | s[0] = jiffies; | |
664 | s[1] = current->pid; | |
665 | } else if (flags & O_CREAT) { | |
666 | p->o_arg.u.attrs = &p->attrs; | |
667 | memcpy(&p->attrs, attrs, sizeof(p->attrs)); | |
668 | } | |
cdd4e68b TM |
669 | p->c_arg.fh = &p->o_res.fh; |
670 | p->c_arg.stateid = &p->o_res.stateid; | |
671 | p->c_arg.seqid = p->o_arg.seqid; | |
2ced46c2 | 672 | nfs4_init_opendata_res(p); |
c6d00e63 | 673 | kref_init(&p->kref); |
e56e0b78 TM |
674 | return p; |
675 | err_free: | |
676 | kfree(p); | |
677 | err: | |
678 | dput(parent); | |
679 | return NULL; | |
680 | } | |
681 | ||
c6d00e63 | 682 | static void nfs4_opendata_free(struct kref *kref) |
e56e0b78 | 683 | { |
c6d00e63 TM |
684 | struct nfs4_opendata *p = container_of(kref, |
685 | struct nfs4_opendata, kref); | |
686 | ||
687 | nfs_free_seqid(p->o_arg.seqid); | |
aac00a8d TM |
688 | if (p->state != NULL) |
689 | nfs4_put_open_state(p->state); | |
c6d00e63 TM |
690 | nfs4_put_state_owner(p->owner); |
691 | dput(p->dir); | |
31f31db1 | 692 | path_put(&p->path); |
c6d00e63 TM |
693 | kfree(p); |
694 | } | |
695 | ||
696 | static void nfs4_opendata_put(struct nfs4_opendata *p) | |
697 | { | |
698 | if (p != NULL) | |
699 | kref_put(&p->kref, nfs4_opendata_free); | |
e56e0b78 TM |
700 | } |
701 | ||
06f814a3 TM |
702 | static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) |
703 | { | |
06f814a3 TM |
704 | int ret; |
705 | ||
06f814a3 | 706 | ret = rpc_wait_for_completion_task(task); |
06f814a3 TM |
707 | return ret; |
708 | } | |
709 | ||
dc0b027d | 710 | static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) |
6ee41268 TM |
711 | { |
712 | int ret = 0; | |
dc0b027d TM |
713 | |
714 | if (open_mode & O_EXCL) | |
715 | goto out; | |
716 | switch (mode & (FMODE_READ|FMODE_WRITE)) { | |
6ee41268 TM |
717 | case FMODE_READ: |
718 | ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
719 | break; |
720 | case FMODE_WRITE: | |
721 | ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0; | |
6ee41268 TM |
722 | break; |
723 | case FMODE_READ|FMODE_WRITE: | |
724 | ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0; | |
725 | } | |
dc0b027d | 726 | out: |
6ee41268 TM |
727 | return ret; |
728 | } | |
729 | ||
dc0b027d | 730 | static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) |
aac00a8d | 731 | { |
dc0b027d | 732 | if ((delegation->type & fmode) != fmode) |
aac00a8d | 733 | return 0; |
15c831bf | 734 | if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) |
aac00a8d | 735 | return 0; |
b7391f44 | 736 | nfs_mark_delegation_referenced(delegation); |
aac00a8d TM |
737 | return 1; |
738 | } | |
739 | ||
dc0b027d | 740 | static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) |
e7616923 | 741 | { |
dc0b027d | 742 | switch (fmode) { |
e7616923 TM |
743 | case FMODE_WRITE: |
744 | state->n_wronly++; | |
745 | break; | |
746 | case FMODE_READ: | |
747 | state->n_rdonly++; | |
748 | break; | |
749 | case FMODE_READ|FMODE_WRITE: | |
750 | state->n_rdwr++; | |
751 | } | |
dc0b027d | 752 | nfs4_state_set_mode_locked(state, state->state | fmode); |
003707c7 TM |
753 | } |
754 | ||
dc0b027d | 755 | static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 TM |
756 | { |
757 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) | |
758 | memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data)); | |
759 | memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data)); | |
dc0b027d | 760 | switch (fmode) { |
003707c7 TM |
761 | case FMODE_READ: |
762 | set_bit(NFS_O_RDONLY_STATE, &state->flags); | |
763 | break; | |
764 | case FMODE_WRITE: | |
765 | set_bit(NFS_O_WRONLY_STATE, &state->flags); | |
766 | break; | |
767 | case FMODE_READ|FMODE_WRITE: | |
768 | set_bit(NFS_O_RDWR_STATE, &state->flags); | |
769 | } | |
e7616923 TM |
770 | } |
771 | ||
dc0b027d | 772 | static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) |
003707c7 | 773 | { |
8bda4e4c | 774 | write_seqlock(&state->seqlock); |
dc0b027d | 775 | nfs_set_open_stateid_locked(state, stateid, fmode); |
8bda4e4c | 776 | write_sequnlock(&state->seqlock); |
003707c7 TM |
777 | } |
778 | ||
dc0b027d | 779 | static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) |
1da177e4 | 780 | { |
8bda4e4c TM |
781 | /* |
782 | * Protect the call to nfs4_state_set_mode_locked and | |
783 | * serialise the stateid update | |
784 | */ | |
785 | write_seqlock(&state->seqlock); | |
003707c7 TM |
786 | if (deleg_stateid != NULL) { |
787 | memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data)); | |
788 | set_bit(NFS_DELEGATED_STATE, &state->flags); | |
789 | } | |
790 | if (open_stateid != NULL) | |
dc0b027d | 791 | nfs_set_open_stateid_locked(state, open_stateid, fmode); |
8bda4e4c TM |
792 | write_sequnlock(&state->seqlock); |
793 | spin_lock(&state->owner->so_lock); | |
dc0b027d | 794 | update_open_stateflags(state, fmode); |
ec073428 | 795 | spin_unlock(&state->owner->so_lock); |
1da177e4 LT |
796 | } |
797 | ||
dc0b027d | 798 | static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) |
34310430 TM |
799 | { |
800 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
801 | struct nfs_delegation *deleg_cur; | |
802 | int ret = 0; | |
803 | ||
dc0b027d | 804 | fmode &= (FMODE_READ|FMODE_WRITE); |
34310430 TM |
805 | |
806 | rcu_read_lock(); | |
807 | deleg_cur = rcu_dereference(nfsi->delegation); | |
808 | if (deleg_cur == NULL) | |
809 | goto no_delegation; | |
810 | ||
811 | spin_lock(&deleg_cur->lock); | |
812 | if (nfsi->delegation != deleg_cur || | |
dc0b027d | 813 | (deleg_cur->type & fmode) != fmode) |
34310430 TM |
814 | goto no_delegation_unlock; |
815 | ||
816 | if (delegation == NULL) | |
817 | delegation = &deleg_cur->stateid; | |
818 | else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0) | |
819 | goto no_delegation_unlock; | |
820 | ||
b7391f44 | 821 | nfs_mark_delegation_referenced(deleg_cur); |
dc0b027d | 822 | __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); |
34310430 TM |
823 | ret = 1; |
824 | no_delegation_unlock: | |
825 | spin_unlock(&deleg_cur->lock); | |
826 | no_delegation: | |
827 | rcu_read_unlock(); | |
828 | ||
829 | if (!ret && open_stateid != NULL) { | |
dc0b027d | 830 | __update_open_stateid(state, open_stateid, NULL, fmode); |
34310430 TM |
831 | ret = 1; |
832 | } | |
833 | ||
834 | return ret; | |
835 | } | |
836 | ||
837 | ||
dc0b027d | 838 | static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) |
aac00a8d TM |
839 | { |
840 | struct nfs_delegation *delegation; | |
841 | ||
842 | rcu_read_lock(); | |
843 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
dc0b027d | 844 | if (delegation == NULL || (delegation->type & fmode) == fmode) { |
aac00a8d TM |
845 | rcu_read_unlock(); |
846 | return; | |
847 | } | |
848 | rcu_read_unlock(); | |
849 | nfs_inode_return_delegation(inode); | |
850 | } | |
851 | ||
6ee41268 | 852 | static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) |
aac00a8d TM |
853 | { |
854 | struct nfs4_state *state = opendata->state; | |
855 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
856 | struct nfs_delegation *delegation; | |
dc0b027d TM |
857 | int open_mode = opendata->o_arg.open_flags & O_EXCL; |
858 | fmode_t fmode = opendata->o_arg.fmode; | |
aac00a8d TM |
859 | nfs4_stateid stateid; |
860 | int ret = -EAGAIN; | |
861 | ||
aac00a8d | 862 | for (;;) { |
dc0b027d | 863 | if (can_open_cached(state, fmode, open_mode)) { |
6ee41268 | 864 | spin_lock(&state->owner->so_lock); |
dc0b027d TM |
865 | if (can_open_cached(state, fmode, open_mode)) { |
866 | update_open_stateflags(state, fmode); | |
6ee41268 | 867 | spin_unlock(&state->owner->so_lock); |
6ee41268 TM |
868 | goto out_return_state; |
869 | } | |
870 | spin_unlock(&state->owner->so_lock); | |
871 | } | |
34310430 TM |
872 | rcu_read_lock(); |
873 | delegation = rcu_dereference(nfsi->delegation); | |
874 | if (delegation == NULL || | |
dc0b027d | 875 | !can_open_delegated(delegation, fmode)) { |
34310430 | 876 | rcu_read_unlock(); |
aac00a8d | 877 | break; |
34310430 | 878 | } |
aac00a8d TM |
879 | /* Save the delegation */ |
880 | memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data)); | |
881 | rcu_read_unlock(); | |
af22f94a | 882 | ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); |
aac00a8d TM |
883 | if (ret != 0) |
884 | goto out; | |
885 | ret = -EAGAIN; | |
34310430 TM |
886 | |
887 | /* Try to update the stateid using the delegation */ | |
dc0b027d | 888 | if (update_open_stateid(state, NULL, &stateid, fmode)) |
34310430 | 889 | goto out_return_state; |
aac00a8d | 890 | } |
aac00a8d TM |
891 | out: |
892 | return ERR_PTR(ret); | |
893 | out_return_state: | |
894 | atomic_inc(&state->count); | |
895 | return state; | |
896 | } | |
897 | ||
24ac23ab TM |
898 | static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) |
899 | { | |
900 | struct inode *inode; | |
901 | struct nfs4_state *state = NULL; | |
003707c7 | 902 | struct nfs_delegation *delegation; |
1b370bc2 | 903 | int ret; |
24ac23ab | 904 | |
aac00a8d | 905 | if (!data->rpc_done) { |
6ee41268 | 906 | state = nfs4_try_open_cached(data); |
aac00a8d TM |
907 | goto out; |
908 | } | |
909 | ||
1b370bc2 | 910 | ret = -EAGAIN; |
24ac23ab | 911 | if (!(data->f_attr.valid & NFS_ATTR_FATTR)) |
1b370bc2 | 912 | goto err; |
24ac23ab | 913 | inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr); |
1b370bc2 | 914 | ret = PTR_ERR(inode); |
03f28e3a | 915 | if (IS_ERR(inode)) |
1b370bc2 TM |
916 | goto err; |
917 | ret = -ENOMEM; | |
24ac23ab TM |
918 | state = nfs4_get_open_state(inode, data->owner); |
919 | if (state == NULL) | |
1b370bc2 | 920 | goto err_put_inode; |
549d6ed5 | 921 | if (data->o_res.delegation_type != 0) { |
549d6ed5 TM |
922 | int delegation_flags = 0; |
923 | ||
003707c7 TM |
924 | rcu_read_lock(); |
925 | delegation = rcu_dereference(NFS_I(inode)->delegation); | |
926 | if (delegation) | |
927 | delegation_flags = delegation->flags; | |
928 | rcu_read_unlock(); | |
15c831bf | 929 | if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) |
549d6ed5 TM |
930 | nfs_inode_set_delegation(state->inode, |
931 | data->owner->so_cred, | |
932 | &data->o_res); | |
933 | else | |
934 | nfs_inode_reclaim_delegation(state->inode, | |
935 | data->owner->so_cred, | |
936 | &data->o_res); | |
937 | } | |
34310430 TM |
938 | |
939 | update_open_stateid(state, &data->o_res.stateid, NULL, | |
dc0b027d | 940 | data->o_arg.fmode); |
24ac23ab | 941 | iput(inode); |
aac00a8d | 942 | out: |
24ac23ab | 943 | return state; |
1b370bc2 TM |
944 | err_put_inode: |
945 | iput(inode); | |
946 | err: | |
947 | return ERR_PTR(ret); | |
24ac23ab TM |
948 | } |
949 | ||
864472e9 TM |
950 | static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) |
951 | { | |
952 | struct nfs_inode *nfsi = NFS_I(state->inode); | |
953 | struct nfs_open_context *ctx; | |
954 | ||
955 | spin_lock(&state->inode->i_lock); | |
956 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
957 | if (ctx->state != state) | |
958 | continue; | |
959 | get_nfs_open_context(ctx); | |
960 | spin_unlock(&state->inode->i_lock); | |
961 | return ctx; | |
962 | } | |
963 | spin_unlock(&state->inode->i_lock); | |
964 | return ERR_PTR(-ENOENT); | |
965 | } | |
966 | ||
6f220ed5 TM |
967 | static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state) |
968 | { | |
969 | struct nfs4_opendata *opendata; | |
970 | ||
dc0b027d | 971 | opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL); |
6f220ed5 TM |
972 | if (opendata == NULL) |
973 | return ERR_PTR(-ENOMEM); | |
974 | opendata->state = state; | |
975 | atomic_inc(&state->count); | |
976 | return opendata; | |
977 | } | |
978 | ||
dc0b027d | 979 | static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) |
864472e9 | 980 | { |
2ced46c2 | 981 | struct nfs4_state *newstate; |
864472e9 TM |
982 | int ret; |
983 | ||
dc0b027d TM |
984 | opendata->o_arg.open_flags = 0; |
985 | opendata->o_arg.fmode = fmode; | |
2ced46c2 TM |
986 | memset(&opendata->o_res, 0, sizeof(opendata->o_res)); |
987 | memset(&opendata->c_res, 0, sizeof(opendata->c_res)); | |
988 | nfs4_init_opendata_res(opendata); | |
864472e9 TM |
989 | ret = _nfs4_proc_open(opendata); |
990 | if (ret != 0) | |
991 | return ret; | |
2ced46c2 | 992 | newstate = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
993 | if (IS_ERR(newstate)) |
994 | return PTR_ERR(newstate); | |
dc0b027d | 995 | nfs4_close_state(&opendata->path, newstate, fmode); |
2ced46c2 | 996 | *res = newstate; |
864472e9 TM |
997 | return 0; |
998 | } | |
999 | ||
1000 | static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) | |
1001 | { | |
864472e9 | 1002 | struct nfs4_state *newstate; |
864472e9 TM |
1003 | int ret; |
1004 | ||
1005 | /* memory barrier prior to reading state->n_* */ | |
2ced46c2 | 1006 | clear_bit(NFS_DELEGATED_STATE, &state->flags); |
864472e9 TM |
1007 | smp_rmb(); |
1008 | if (state->n_rdwr != 0) { | |
2ced46c2 | 1009 | ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); |
864472e9 TM |
1010 | if (ret != 0) |
1011 | return ret; | |
2ced46c2 TM |
1012 | if (newstate != state) |
1013 | return -ESTALE; | |
864472e9 TM |
1014 | } |
1015 | if (state->n_wronly != 0) { | |
2ced46c2 | 1016 | ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); |
864472e9 TM |
1017 | if (ret != 0) |
1018 | return ret; | |
2ced46c2 TM |
1019 | if (newstate != state) |
1020 | return -ESTALE; | |
864472e9 TM |
1021 | } |
1022 | if (state->n_rdonly != 0) { | |
2ced46c2 | 1023 | ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); |
864472e9 TM |
1024 | if (ret != 0) |
1025 | return ret; | |
2ced46c2 TM |
1026 | if (newstate != state) |
1027 | return -ESTALE; | |
864472e9 | 1028 | } |
1ac7e2fd TM |
1029 | /* |
1030 | * We may have performed cached opens for all three recoveries. | |
1031 | * Check if we need to update the current stateid. | |
1032 | */ | |
1033 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && | |
1034 | memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) { | |
8bda4e4c | 1035 | write_seqlock(&state->seqlock); |
1ac7e2fd TM |
1036 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) |
1037 | memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)); | |
8bda4e4c | 1038 | write_sequnlock(&state->seqlock); |
1ac7e2fd | 1039 | } |
864472e9 TM |
1040 | return 0; |
1041 | } | |
1042 | ||
1da177e4 LT |
1043 | /* |
1044 | * OPEN_RECLAIM: | |
1045 | * reclaim state on the server after a reboot. | |
1da177e4 | 1046 | */ |
539cd03a | 1047 | static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1048 | { |
1ac7e2fd | 1049 | struct nfs_delegation *delegation; |
864472e9 | 1050 | struct nfs4_opendata *opendata; |
dc0b027d | 1051 | fmode_t delegation_type = 0; |
1da177e4 LT |
1052 | int status; |
1053 | ||
6f220ed5 TM |
1054 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1055 | if (IS_ERR(opendata)) | |
1056 | return PTR_ERR(opendata); | |
864472e9 TM |
1057 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS; |
1058 | opendata->o_arg.fh = NFS_FH(state->inode); | |
1ac7e2fd TM |
1059 | rcu_read_lock(); |
1060 | delegation = rcu_dereference(NFS_I(state->inode)->delegation); | |
15c831bf | 1061 | if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) |
65bbf6bd | 1062 | delegation_type = delegation->type; |
1ac7e2fd | 1063 | rcu_read_unlock(); |
864472e9 TM |
1064 | opendata->o_arg.u.delegation_type = delegation_type; |
1065 | status = nfs4_open_recover(opendata, state); | |
c6d00e63 | 1066 | nfs4_opendata_put(opendata); |
1da177e4 LT |
1067 | return status; |
1068 | } | |
1069 | ||
539cd03a | 1070 | static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 LT |
1071 | { |
1072 | struct nfs_server *server = NFS_SERVER(state->inode); | |
1073 | struct nfs4_exception exception = { }; | |
1074 | int err; | |
1075 | do { | |
539cd03a | 1076 | err = _nfs4_do_open_reclaim(ctx, state); |
202b50dc TM |
1077 | if (err != -NFS4ERR_DELAY) |
1078 | break; | |
1079 | nfs4_handle_exception(server, err, &exception); | |
1da177e4 LT |
1080 | } while (exception.retry); |
1081 | return err; | |
1082 | } | |
1083 | ||
864472e9 TM |
1084 | static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1085 | { | |
1086 | struct nfs_open_context *ctx; | |
1087 | int ret; | |
1088 | ||
1089 | ctx = nfs4_state_find_open_context(state); | |
1090 | if (IS_ERR(ctx)) | |
1091 | return PTR_ERR(ctx); | |
539cd03a | 1092 | ret = nfs4_do_open_reclaim(ctx, state); |
864472e9 TM |
1093 | put_nfs_open_context(ctx); |
1094 | return ret; | |
1095 | } | |
1096 | ||
13437e12 | 1097 | static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 | 1098 | { |
e56e0b78 | 1099 | struct nfs4_opendata *opendata; |
864472e9 | 1100 | int ret; |
1da177e4 | 1101 | |
6f220ed5 TM |
1102 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1103 | if (IS_ERR(opendata)) | |
1104 | return PTR_ERR(opendata); | |
e56e0b78 | 1105 | opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR; |
13437e12 | 1106 | memcpy(opendata->o_arg.u.delegation.data, stateid->data, |
e56e0b78 | 1107 | sizeof(opendata->o_arg.u.delegation.data)); |
864472e9 | 1108 | ret = nfs4_open_recover(opendata, state); |
c6d00e63 | 1109 | nfs4_opendata_put(opendata); |
864472e9 | 1110 | return ret; |
1da177e4 LT |
1111 | } |
1112 | ||
13437e12 | 1113 | int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) |
1da177e4 LT |
1114 | { |
1115 | struct nfs4_exception exception = { }; | |
539cd03a | 1116 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 LT |
1117 | int err; |
1118 | do { | |
13437e12 | 1119 | err = _nfs4_open_delegation_recall(ctx, state, stateid); |
1da177e4 LT |
1120 | switch (err) { |
1121 | case 0: | |
1122 | return err; | |
1123 | case -NFS4ERR_STALE_CLIENTID: | |
1124 | case -NFS4ERR_STALE_STATEID: | |
1125 | case -NFS4ERR_EXPIRED: | |
1126 | /* Don't recall a delegation if it was lost */ | |
7539bbab | 1127 | nfs4_schedule_state_recovery(server->nfs_client); |
1da177e4 LT |
1128 | return err; |
1129 | } | |
1130 | err = nfs4_handle_exception(server, err, &exception); | |
1131 | } while (exception.retry); | |
1132 | return err; | |
1133 | } | |
1134 | ||
cdd4e68b TM |
1135 | static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) |
1136 | { | |
1137 | struct nfs4_opendata *data = calldata; | |
1138 | ||
1139 | data->rpc_status = task->tk_status; | |
1140 | if (RPC_ASSASSINATED(task)) | |
1141 | return; | |
26e976a8 | 1142 | if (data->rpc_status == 0) { |
cdd4e68b TM |
1143 | memcpy(data->o_res.stateid.data, data->c_res.stateid.data, |
1144 | sizeof(data->o_res.stateid.data)); | |
bb22629e | 1145 | nfs_confirm_seqid(&data->owner->so_seqid, 0); |
26e976a8 | 1146 | renew_lease(data->o_res.server, data->timestamp); |
3e309914 | 1147 | data->rpc_done = 1; |
26e976a8 | 1148 | } |
cdd4e68b TM |
1149 | } |
1150 | ||
1151 | static void nfs4_open_confirm_release(void *calldata) | |
1152 | { | |
1153 | struct nfs4_opendata *data = calldata; | |
1154 | struct nfs4_state *state = NULL; | |
1155 | ||
1156 | /* If this request hasn't been cancelled, do nothing */ | |
1157 | if (data->cancelled == 0) | |
1158 | goto out_free; | |
1159 | /* In case of error, no cleanup! */ | |
3e309914 | 1160 | if (!data->rpc_done) |
cdd4e68b | 1161 | goto out_free; |
cdd4e68b | 1162 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1163 | if (!IS_ERR(state)) |
dc0b027d | 1164 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
cdd4e68b | 1165 | out_free: |
c6d00e63 | 1166 | nfs4_opendata_put(data); |
cdd4e68b TM |
1167 | } |
1168 | ||
1169 | static const struct rpc_call_ops nfs4_open_confirm_ops = { | |
cdd4e68b TM |
1170 | .rpc_call_done = nfs4_open_confirm_done, |
1171 | .rpc_release = nfs4_open_confirm_release, | |
1172 | }; | |
1173 | ||
1174 | /* | |
1175 | * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata | |
1176 | */ | |
1177 | static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) | |
1178 | { | |
1179 | struct nfs_server *server = NFS_SERVER(data->dir->d_inode); | |
1180 | struct rpc_task *task; | |
5138fde0 TM |
1181 | struct rpc_message msg = { |
1182 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], | |
1183 | .rpc_argp = &data->c_arg, | |
1184 | .rpc_resp = &data->c_res, | |
1185 | .rpc_cred = data->owner->so_cred, | |
1186 | }; | |
c970aa85 TM |
1187 | struct rpc_task_setup task_setup_data = { |
1188 | .rpc_client = server->client, | |
5138fde0 | 1189 | .rpc_message = &msg, |
c970aa85 TM |
1190 | .callback_ops = &nfs4_open_confirm_ops, |
1191 | .callback_data = data, | |
101070ca | 1192 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1193 | .flags = RPC_TASK_ASYNC, |
1194 | }; | |
1da177e4 LT |
1195 | int status; |
1196 | ||
c6d00e63 | 1197 | kref_get(&data->kref); |
3e309914 TM |
1198 | data->rpc_done = 0; |
1199 | data->rpc_status = 0; | |
5138fde0 | 1200 | data->timestamp = jiffies; |
c970aa85 | 1201 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1202 | if (IS_ERR(task)) |
cdd4e68b | 1203 | return PTR_ERR(task); |
cdd4e68b TM |
1204 | status = nfs4_wait_for_completion_rpc_task(task); |
1205 | if (status != 0) { | |
1206 | data->cancelled = 1; | |
1207 | smp_wmb(); | |
1208 | } else | |
1209 | status = data->rpc_status; | |
e6b3c4db | 1210 | rpc_put_task(task); |
1da177e4 LT |
1211 | return status; |
1212 | } | |
1213 | ||
24ac23ab | 1214 | static void nfs4_open_prepare(struct rpc_task *task, void *calldata) |
1da177e4 | 1215 | { |
24ac23ab TM |
1216 | struct nfs4_opendata *data = calldata; |
1217 | struct nfs4_state_owner *sp = data->owner; | |
5138fde0 | 1218 | |
24ac23ab TM |
1219 | if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) |
1220 | return; | |
aac00a8d TM |
1221 | /* |
1222 | * Check if we still need to send an OPEN call, or if we can use | |
1223 | * a delegation instead. | |
1224 | */ | |
1225 | if (data->state != NULL) { | |
1226 | struct nfs_delegation *delegation; | |
1227 | ||
dc0b027d | 1228 | if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) |
6ee41268 | 1229 | goto out_no_action; |
aac00a8d TM |
1230 | rcu_read_lock(); |
1231 | delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); | |
1232 | if (delegation != NULL && | |
15c831bf | 1233 | test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) { |
aac00a8d | 1234 | rcu_read_unlock(); |
6ee41268 | 1235 | goto out_no_action; |
aac00a8d TM |
1236 | } |
1237 | rcu_read_unlock(); | |
1238 | } | |
24ac23ab | 1239 | /* Update sequence id. */ |
9f958ab8 | 1240 | data->o_arg.id = sp->so_owner_id.id; |
24ac23ab | 1241 | data->o_arg.clientid = sp->so_client->cl_clientid; |
6f220ed5 | 1242 | if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) { |
5138fde0 | 1243 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; |
6f220ed5 TM |
1244 | nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); |
1245 | } | |
26e976a8 | 1246 | data->timestamp = jiffies; |
d898528c AA |
1247 | if (nfs4_setup_sequence(data->o_arg.server->nfs_client, |
1248 | &data->o_arg.seq_args, | |
1249 | &data->o_res.seq_res, 1, task)) | |
1250 | return; | |
5138fde0 | 1251 | rpc_call_start(task); |
6ee41268 TM |
1252 | return; |
1253 | out_no_action: | |
1254 | task->tk_action = NULL; | |
1255 | ||
24ac23ab | 1256 | } |
1da177e4 | 1257 | |
24ac23ab TM |
1258 | static void nfs4_open_done(struct rpc_task *task, void *calldata) |
1259 | { | |
1260 | struct nfs4_opendata *data = calldata; | |
1da177e4 | 1261 | |
24ac23ab | 1262 | data->rpc_status = task->tk_status; |
d898528c AA |
1263 | |
1264 | nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res, | |
1265 | task->tk_status); | |
1266 | ||
24ac23ab TM |
1267 | if (RPC_ASSASSINATED(task)) |
1268 | return; | |
1269 | if (task->tk_status == 0) { | |
1270 | switch (data->o_res.f_attr->mode & S_IFMT) { | |
6f926b5b TM |
1271 | case S_IFREG: |
1272 | break; | |
1273 | case S_IFLNK: | |
24ac23ab | 1274 | data->rpc_status = -ELOOP; |
6f926b5b TM |
1275 | break; |
1276 | case S_IFDIR: | |
24ac23ab | 1277 | data->rpc_status = -EISDIR; |
6f926b5b TM |
1278 | break; |
1279 | default: | |
24ac23ab | 1280 | data->rpc_status = -ENOTDIR; |
6f926b5b | 1281 | } |
26e976a8 | 1282 | renew_lease(data->o_res.server, data->timestamp); |
0f9f95e0 TM |
1283 | if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) |
1284 | nfs_confirm_seqid(&data->owner->so_seqid, 0); | |
6f926b5b | 1285 | } |
3e309914 | 1286 | data->rpc_done = 1; |
24ac23ab | 1287 | } |
6f926b5b | 1288 | |
24ac23ab TM |
1289 | static void nfs4_open_release(void *calldata) |
1290 | { | |
1291 | struct nfs4_opendata *data = calldata; | |
1292 | struct nfs4_state *state = NULL; | |
1293 | ||
1294 | /* If this request hasn't been cancelled, do nothing */ | |
1295 | if (data->cancelled == 0) | |
1296 | goto out_free; | |
1297 | /* In case of error, no cleanup! */ | |
3e309914 | 1298 | if (data->rpc_status != 0 || !data->rpc_done) |
24ac23ab TM |
1299 | goto out_free; |
1300 | /* In case we need an open_confirm, no cleanup! */ | |
1301 | if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) | |
1302 | goto out_free; | |
24ac23ab | 1303 | state = nfs4_opendata_to_nfs4_state(data); |
1b370bc2 | 1304 | if (!IS_ERR(state)) |
dc0b027d | 1305 | nfs4_close_state(&data->path, state, data->o_arg.fmode); |
24ac23ab | 1306 | out_free: |
c6d00e63 | 1307 | nfs4_opendata_put(data); |
24ac23ab TM |
1308 | } |
1309 | ||
1310 | static const struct rpc_call_ops nfs4_open_ops = { | |
1311 | .rpc_call_prepare = nfs4_open_prepare, | |
1312 | .rpc_call_done = nfs4_open_done, | |
1313 | .rpc_release = nfs4_open_release, | |
1314 | }; | |
1315 | ||
1316 | /* | |
1317 | * Note: On error, nfs4_proc_open will free the struct nfs4_opendata | |
1318 | */ | |
1319 | static int _nfs4_proc_open(struct nfs4_opendata *data) | |
1320 | { | |
1321 | struct inode *dir = data->dir->d_inode; | |
1322 | struct nfs_server *server = NFS_SERVER(dir); | |
1323 | struct nfs_openargs *o_arg = &data->o_arg; | |
1324 | struct nfs_openres *o_res = &data->o_res; | |
1325 | struct rpc_task *task; | |
5138fde0 TM |
1326 | struct rpc_message msg = { |
1327 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], | |
1328 | .rpc_argp = o_arg, | |
1329 | .rpc_resp = o_res, | |
1330 | .rpc_cred = data->owner->so_cred, | |
1331 | }; | |
c970aa85 TM |
1332 | struct rpc_task_setup task_setup_data = { |
1333 | .rpc_client = server->client, | |
5138fde0 | 1334 | .rpc_message = &msg, |
c970aa85 TM |
1335 | .callback_ops = &nfs4_open_ops, |
1336 | .callback_data = data, | |
101070ca | 1337 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1338 | .flags = RPC_TASK_ASYNC, |
1339 | }; | |
24ac23ab TM |
1340 | int status; |
1341 | ||
c6d00e63 | 1342 | kref_get(&data->kref); |
3e309914 TM |
1343 | data->rpc_done = 0; |
1344 | data->rpc_status = 0; | |
2ced46c2 | 1345 | data->cancelled = 0; |
c970aa85 | 1346 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 1347 | if (IS_ERR(task)) |
24ac23ab | 1348 | return PTR_ERR(task); |
24ac23ab TM |
1349 | status = nfs4_wait_for_completion_rpc_task(task); |
1350 | if (status != 0) { | |
1351 | data->cancelled = 1; | |
1352 | smp_wmb(); | |
1353 | } else | |
1354 | status = data->rpc_status; | |
e6b3c4db | 1355 | rpc_put_task(task); |
3e309914 | 1356 | if (status != 0 || !data->rpc_done) |
24ac23ab TM |
1357 | return status; |
1358 | ||
9936781d TM |
1359 | if (o_res->fh.size == 0) |
1360 | _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr); | |
1361 | ||
56ae19f3 TM |
1362 | if (o_arg->open_flags & O_CREAT) { |
1363 | update_changeattr(dir, &o_res->cinfo); | |
1364 | nfs_post_op_update_inode(dir, o_res->dir_attr); | |
1365 | } else | |
1366 | nfs_refresh_inode(dir, o_res->dir_attr); | |
1da177e4 | 1367 | if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { |
cdd4e68b | 1368 | status = _nfs4_proc_open_confirm(data); |
1da177e4 | 1369 | if (status != 0) |
24ac23ab | 1370 | return status; |
1da177e4 LT |
1371 | } |
1372 | if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) | |
9936781d | 1373 | _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr); |
24ac23ab | 1374 | return 0; |
1da177e4 LT |
1375 | } |
1376 | ||
10afec90 | 1377 | static int nfs4_recover_expired_lease(struct nfs_server *server) |
58d9714a | 1378 | { |
7539bbab | 1379 | struct nfs_client *clp = server->nfs_client; |
6b30954e | 1380 | int ret; |
58d9714a | 1381 | |
6b30954e | 1382 | for (;;) { |
65de872e | 1383 | ret = nfs4_wait_clnt_recover(clp); |
6b30954e TM |
1384 | if (ret != 0) |
1385 | return ret; | |
e598d843 TM |
1386 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1387 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
6b30954e | 1388 | break; |
58d9714a | 1389 | nfs4_schedule_state_recovery(clp); |
6b30954e TM |
1390 | } |
1391 | return 0; | |
58d9714a TM |
1392 | } |
1393 | ||
1da177e4 LT |
1394 | /* |
1395 | * OPEN_EXPIRED: | |
1396 | * reclaim state on the server after a network partition. | |
1397 | * Assumes caller holds the appropriate lock | |
1398 | */ | |
539cd03a | 1399 | static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
1da177e4 | 1400 | { |
e56e0b78 | 1401 | struct nfs4_opendata *opendata; |
864472e9 | 1402 | int ret; |
1da177e4 | 1403 | |
6f220ed5 TM |
1404 | opendata = nfs4_open_recoverdata_alloc(ctx, state); |
1405 | if (IS_ERR(opendata)) | |
1406 | return PTR_ERR(opendata); | |
864472e9 | 1407 | ret = nfs4_open_recover(opendata, state); |
35d05778 | 1408 | if (ret == -ESTALE) |
539cd03a | 1409 | d_drop(ctx->path.dentry); |
c6d00e63 | 1410 | nfs4_opendata_put(opendata); |
864472e9 | 1411 | return ret; |
1da177e4 LT |
1412 | } |
1413 | ||
539cd03a | 1414 | static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) |
202b50dc | 1415 | { |
539cd03a | 1416 | struct nfs_server *server = NFS_SERVER(state->inode); |
202b50dc TM |
1417 | struct nfs4_exception exception = { }; |
1418 | int err; | |
1419 | ||
1420 | do { | |
539cd03a | 1421 | err = _nfs4_open_expired(ctx, state); |
027b6ca0 TM |
1422 | if (err != -NFS4ERR_DELAY) |
1423 | break; | |
1424 | nfs4_handle_exception(server, err, &exception); | |
202b50dc TM |
1425 | } while (exception.retry); |
1426 | return err; | |
1427 | } | |
1428 | ||
1da177e4 LT |
1429 | static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) |
1430 | { | |
1da177e4 | 1431 | struct nfs_open_context *ctx; |
864472e9 | 1432 | int ret; |
1da177e4 | 1433 | |
864472e9 TM |
1434 | ctx = nfs4_state_find_open_context(state); |
1435 | if (IS_ERR(ctx)) | |
1436 | return PTR_ERR(ctx); | |
539cd03a | 1437 | ret = nfs4_do_open_expired(ctx, state); |
864472e9 TM |
1438 | put_nfs_open_context(ctx); |
1439 | return ret; | |
1da177e4 LT |
1440 | } |
1441 | ||
aa53ed54 JL |
1442 | /* |
1443 | * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* | |
1444 | * fields corresponding to attributes that were used to store the verifier. | |
1445 | * Make sure we clobber those fields in the later setattr call | |
1446 | */ | |
1447 | static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) | |
1448 | { | |
1449 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && | |
1450 | !(sattr->ia_valid & ATTR_ATIME_SET)) | |
1451 | sattr->ia_valid |= ATTR_ATIME; | |
1452 | ||
1453 | if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && | |
1454 | !(sattr->ia_valid & ATTR_MTIME_SET)) | |
1455 | sattr->ia_valid |= ATTR_MTIME; | |
1456 | } | |
1457 | ||
1da177e4 | 1458 | /* |
24ac23ab | 1459 | * Returns a referenced nfs4_state |
1da177e4 | 1460 | */ |
dc0b027d | 1461 | 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 |
1462 | { |
1463 | struct nfs4_state_owner *sp; | |
1464 | struct nfs4_state *state = NULL; | |
1465 | struct nfs_server *server = NFS_SERVER(dir); | |
e56e0b78 | 1466 | struct nfs4_opendata *opendata; |
aac00a8d | 1467 | int status; |
1da177e4 LT |
1468 | |
1469 | /* Protect against reboot recovery conflicts */ | |
1da177e4 LT |
1470 | status = -ENOMEM; |
1471 | if (!(sp = nfs4_get_state_owner(server, cred))) { | |
1472 | dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); | |
1473 | goto out_err; | |
1474 | } | |
58d9714a TM |
1475 | status = nfs4_recover_expired_lease(server); |
1476 | if (status != 0) | |
b4454fe1 | 1477 | goto err_put_state_owner; |
aac00a8d | 1478 | if (path->dentry->d_inode != NULL) |
dc0b027d | 1479 | nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode); |
58d9714a | 1480 | status = -ENOMEM; |
dc0b027d | 1481 | opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr); |
e56e0b78 | 1482 | if (opendata == NULL) |
95d35cb4 | 1483 | goto err_put_state_owner; |
1da177e4 | 1484 | |
aac00a8d TM |
1485 | if (path->dentry->d_inode != NULL) |
1486 | opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp); | |
1487 | ||
24ac23ab | 1488 | status = _nfs4_proc_open(opendata); |
1da177e4 | 1489 | if (status != 0) |
c6d00e63 | 1490 | goto err_opendata_put; |
1da177e4 | 1491 | |
aa53ed54 JL |
1492 | if (opendata->o_arg.open_flags & O_EXCL) |
1493 | nfs4_exclusive_attrset(opendata, sattr); | |
1494 | ||
24ac23ab | 1495 | state = nfs4_opendata_to_nfs4_state(opendata); |
1b370bc2 TM |
1496 | status = PTR_ERR(state); |
1497 | if (IS_ERR(state)) | |
c6d00e63 | 1498 | goto err_opendata_put; |
c6d00e63 | 1499 | nfs4_opendata_put(opendata); |
1da177e4 | 1500 | nfs4_put_state_owner(sp); |
1da177e4 LT |
1501 | *res = state; |
1502 | return 0; | |
c6d00e63 TM |
1503 | err_opendata_put: |
1504 | nfs4_opendata_put(opendata); | |
e56e0b78 TM |
1505 | err_put_state_owner: |
1506 | nfs4_put_state_owner(sp); | |
1da177e4 | 1507 | out_err: |
1da177e4 LT |
1508 | *res = NULL; |
1509 | return status; | |
1510 | } | |
1511 | ||
1512 | ||
dc0b027d | 1513 | 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 |
1514 | { |
1515 | struct nfs4_exception exception = { }; | |
1516 | struct nfs4_state *res; | |
1517 | int status; | |
1518 | ||
1519 | do { | |
dc0b027d | 1520 | status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res); |
1da177e4 LT |
1521 | if (status == 0) |
1522 | break; | |
1523 | /* NOTE: BAD_SEQID means the server and client disagree about the | |
1524 | * book-keeping w.r.t. state-changing operations | |
1525 | * (OPEN/CLOSE/LOCK/LOCKU...) | |
1526 | * It is actually a sign of a bug on the client or on the server. | |
1527 | * | |
1528 | * If we receive a BAD_SEQID error in the particular case of | |
cee54fc9 | 1529 | * doing an OPEN, we assume that nfs_increment_open_seqid() will |
1da177e4 LT |
1530 | * have unhashed the old state_owner for us, and that we can |
1531 | * therefore safely retry using a new one. We should still warn | |
1532 | * the user though... | |
1533 | */ | |
1534 | if (status == -NFS4ERR_BAD_SEQID) { | |
6f43ddcc TM |
1535 | printk(KERN_WARNING "NFS: v4 server %s " |
1536 | " returned a bad sequence-id error!\n", | |
1537 | NFS_SERVER(dir)->nfs_client->cl_hostname); | |
1da177e4 LT |
1538 | exception.retry = 1; |
1539 | continue; | |
1540 | } | |
550f5747 TM |
1541 | /* |
1542 | * BAD_STATEID on OPEN means that the server cancelled our | |
1543 | * state before it received the OPEN_CONFIRM. | |
1544 | * Recover by retrying the request as per the discussion | |
1545 | * on Page 181 of RFC3530. | |
1546 | */ | |
1547 | if (status == -NFS4ERR_BAD_STATEID) { | |
1548 | exception.retry = 1; | |
1549 | continue; | |
1550 | } | |
aac00a8d TM |
1551 | if (status == -EAGAIN) { |
1552 | /* We must have found a delegation */ | |
1553 | exception.retry = 1; | |
1554 | continue; | |
1555 | } | |
1da177e4 LT |
1556 | res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir), |
1557 | status, &exception)); | |
1558 | } while (exception.retry); | |
1559 | return res; | |
1560 | } | |
1561 | ||
659bfcd6 TM |
1562 | static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1563 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1564 | struct nfs4_state *state) | |
1da177e4 | 1565 | { |
3e4f6290 | 1566 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1567 | struct nfs_setattrargs arg = { |
3e4f6290 | 1568 | .fh = NFS_FH(inode), |
1da177e4 LT |
1569 | .iap = sattr, |
1570 | .server = server, | |
1571 | .bitmask = server->attr_bitmask, | |
1572 | }; | |
1573 | struct nfs_setattrres res = { | |
1574 | .fattr = fattr, | |
1575 | .server = server, | |
1576 | }; | |
1577 | struct rpc_message msg = { | |
659bfcd6 TM |
1578 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], |
1579 | .rpc_argp = &arg, | |
1580 | .rpc_resp = &res, | |
1581 | .rpc_cred = cred, | |
1da177e4 | 1582 | }; |
26e976a8 | 1583 | unsigned long timestamp = jiffies; |
65e4308d | 1584 | int status; |
1da177e4 | 1585 | |
0e574af1 | 1586 | nfs_fattr_init(fattr); |
1da177e4 | 1587 | |
3e4f6290 TM |
1588 | if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) { |
1589 | /* Use that stateid */ | |
1590 | } else if (state != NULL) { | |
08e9eac4 TM |
1591 | nfs4_copy_stateid(&arg.stateid, state, current->files); |
1592 | } else | |
1da177e4 LT |
1593 | memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid)); |
1594 | ||
cccef3b9 | 1595 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
26e976a8 TM |
1596 | if (status == 0 && state != NULL) |
1597 | renew_lease(server, timestamp); | |
65e4308d | 1598 | return status; |
1da177e4 LT |
1599 | } |
1600 | ||
659bfcd6 TM |
1601 | static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, |
1602 | struct nfs_fattr *fattr, struct iattr *sattr, | |
1603 | struct nfs4_state *state) | |
1da177e4 | 1604 | { |
3e4f6290 | 1605 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
1606 | struct nfs4_exception exception = { }; |
1607 | int err; | |
1608 | do { | |
1609 | err = nfs4_handle_exception(server, | |
659bfcd6 | 1610 | _nfs4_do_setattr(inode, cred, fattr, sattr, state), |
1da177e4 LT |
1611 | &exception); |
1612 | } while (exception.retry); | |
1613 | return err; | |
1614 | } | |
1615 | ||
1616 | struct nfs4_closedata { | |
4a35bd41 | 1617 | struct path path; |
1da177e4 LT |
1618 | struct inode *inode; |
1619 | struct nfs4_state *state; | |
1620 | struct nfs_closeargs arg; | |
1621 | struct nfs_closeres res; | |
516a6af6 | 1622 | struct nfs_fattr fattr; |
26e976a8 | 1623 | unsigned long timestamp; |
1da177e4 LT |
1624 | }; |
1625 | ||
963d8fe5 | 1626 | static void nfs4_free_closedata(void *data) |
9512135d | 1627 | { |
963d8fe5 TM |
1628 | struct nfs4_closedata *calldata = data; |
1629 | struct nfs4_state_owner *sp = calldata->state->owner; | |
9512135d TM |
1630 | |
1631 | nfs4_put_open_state(calldata->state); | |
1632 | nfs_free_seqid(calldata->arg.seqid); | |
9512135d | 1633 | nfs4_put_state_owner(sp); |
31f31db1 | 1634 | path_put(&calldata->path); |
9512135d TM |
1635 | kfree(calldata); |
1636 | } | |
1637 | ||
963d8fe5 | 1638 | static void nfs4_close_done(struct rpc_task *task, void *data) |
1da177e4 | 1639 | { |
963d8fe5 | 1640 | struct nfs4_closedata *calldata = data; |
1da177e4 | 1641 | struct nfs4_state *state = calldata->state; |
1da177e4 LT |
1642 | struct nfs_server *server = NFS_SERVER(calldata->inode); |
1643 | ||
19ddab06 | 1644 | nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status); |
4ce70ada TM |
1645 | if (RPC_ASSASSINATED(task)) |
1646 | return; | |
1da177e4 LT |
1647 | /* hmm. we are done with the inode, and in the process of freeing |
1648 | * the state_owner. we keep this around to process errors | |
1649 | */ | |
1da177e4 LT |
1650 | switch (task->tk_status) { |
1651 | case 0: | |
45328c35 | 1652 | nfs_set_open_stateid(state, &calldata->res.stateid, 0); |
26e976a8 | 1653 | renew_lease(server, calldata->timestamp); |
1da177e4 LT |
1654 | break; |
1655 | case -NFS4ERR_STALE_STATEID: | |
9e33bed5 TM |
1656 | case -NFS4ERR_OLD_STATEID: |
1657 | case -NFS4ERR_BAD_STATEID: | |
1da177e4 | 1658 | case -NFS4ERR_EXPIRED: |
dc0b027d | 1659 | if (calldata->arg.fmode == 0) |
9e33bed5 | 1660 | break; |
1da177e4 | 1661 | default: |
9e33bed5 | 1662 | if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { |
1da177e4 LT |
1663 | rpc_restart_call(task); |
1664 | return; | |
1665 | } | |
1666 | } | |
19ddab06 | 1667 | nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res); |
516a6af6 | 1668 | nfs_refresh_inode(calldata->inode, calldata->res.fattr); |
1da177e4 LT |
1669 | } |
1670 | ||
4ce70ada | 1671 | static void nfs4_close_prepare(struct rpc_task *task, void *data) |
1da177e4 | 1672 | { |
4ce70ada | 1673 | struct nfs4_closedata *calldata = data; |
9512135d | 1674 | struct nfs4_state *state = calldata->state; |
003707c7 | 1675 | int clear_rd, clear_wr, clear_rdwr; |
9512135d | 1676 | |
963d8fe5 | 1677 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
9512135d | 1678 | return; |
003707c7 | 1679 | |
003707c7 | 1680 | clear_rd = clear_wr = clear_rdwr = 0; |
4cecb76f | 1681 | spin_lock(&state->owner->so_lock); |
003707c7 | 1682 | /* Calculate the change in open mode */ |
e7616923 | 1683 | if (state->n_rdwr == 0) { |
003707c7 | 1684 | if (state->n_rdonly == 0) { |
003707c7 TM |
1685 | clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags); |
1686 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1687 | } | |
1688 | if (state->n_wronly == 0) { | |
003707c7 TM |
1689 | clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags); |
1690 | clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1691 | } | |
e7616923 | 1692 | } |
4cecb76f | 1693 | spin_unlock(&state->owner->so_lock); |
003707c7 | 1694 | if (!clear_rd && !clear_wr && !clear_rdwr) { |
963d8fe5 TM |
1695 | /* Note: exit _without_ calling nfs4_close_done */ |
1696 | task->tk_action = NULL; | |
9512135d TM |
1697 | return; |
1698 | } | |
516a6af6 | 1699 | nfs_fattr_init(calldata->res.fattr); |
45328c35 | 1700 | if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1701 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1702 | calldata->arg.fmode = FMODE_READ; |
45328c35 | 1703 | } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) { |
5138fde0 | 1704 | task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; |
dc0b027d | 1705 | calldata->arg.fmode = FMODE_WRITE; |
45328c35 | 1706 | } |
26e976a8 | 1707 | calldata->timestamp = jiffies; |
19ddab06 AA |
1708 | if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client, |
1709 | &calldata->arg.seq_args, &calldata->res.seq_res, | |
1710 | 1, task)) | |
1711 | return; | |
5138fde0 | 1712 | rpc_call_start(task); |
1da177e4 LT |
1713 | } |
1714 | ||
963d8fe5 | 1715 | static const struct rpc_call_ops nfs4_close_ops = { |
4ce70ada | 1716 | .rpc_call_prepare = nfs4_close_prepare, |
963d8fe5 TM |
1717 | .rpc_call_done = nfs4_close_done, |
1718 | .rpc_release = nfs4_free_closedata, | |
1719 | }; | |
1720 | ||
1da177e4 LT |
1721 | /* |
1722 | * It is possible for data to be read/written from a mem-mapped file | |
1723 | * after the sys_close call (which hits the vfs layer as a flush). | |
1724 | * This means that we can't safely call nfsv4 close on a file until | |
1725 | * the inode is cleared. This in turn means that we are not good | |
1726 | * NFSv4 citizens - we do not indicate to the server to update the file's | |
1727 | * share state even when we are done with one of the three share | |
1728 | * stateid's in the inode. | |
1729 | * | |
1730 | * NOTE: Caller must be holding the sp->so_owner semaphore! | |
1731 | */ | |
a49c3c77 | 1732 | int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait) |
1da177e4 | 1733 | { |
4a35bd41 | 1734 | struct nfs_server *server = NFS_SERVER(state->inode); |
1da177e4 | 1735 | struct nfs4_closedata *calldata; |
b39e625b TM |
1736 | struct nfs4_state_owner *sp = state->owner; |
1737 | struct rpc_task *task; | |
5138fde0 TM |
1738 | struct rpc_message msg = { |
1739 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], | |
1740 | .rpc_cred = state->owner->so_cred, | |
1741 | }; | |
c970aa85 TM |
1742 | struct rpc_task_setup task_setup_data = { |
1743 | .rpc_client = server->client, | |
5138fde0 | 1744 | .rpc_message = &msg, |
c970aa85 | 1745 | .callback_ops = &nfs4_close_ops, |
101070ca | 1746 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
1747 | .flags = RPC_TASK_ASYNC, |
1748 | }; | |
9512135d | 1749 | int status = -ENOMEM; |
1da177e4 | 1750 | |
19ddab06 | 1751 | calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); |
1da177e4 | 1752 | if (calldata == NULL) |
9512135d | 1753 | goto out; |
4a35bd41 | 1754 | calldata->inode = state->inode; |
1da177e4 | 1755 | calldata->state = state; |
4a35bd41 | 1756 | calldata->arg.fh = NFS_FH(state->inode); |
003707c7 | 1757 | calldata->arg.stateid = &state->open_stateid; |
1da177e4 | 1758 | /* Serialization for the sequence id */ |
cee54fc9 | 1759 | calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid); |
9512135d TM |
1760 | if (calldata->arg.seqid == NULL) |
1761 | goto out_free_calldata; | |
dc0b027d | 1762 | calldata->arg.fmode = 0; |
a65318bf | 1763 | calldata->arg.bitmask = server->cache_consistency_bitmask; |
516a6af6 | 1764 | calldata->res.fattr = &calldata->fattr; |
c1d51931 | 1765 | calldata->res.seqid = calldata->arg.seqid; |
516a6af6 | 1766 | calldata->res.server = server; |
5f7dbd5c | 1767 | calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
4a35bd41 TM |
1768 | calldata->path.mnt = mntget(path->mnt); |
1769 | calldata->path.dentry = dget(path->dentry); | |
9512135d | 1770 | |
5138fde0 TM |
1771 | msg.rpc_argp = &calldata->arg, |
1772 | msg.rpc_resp = &calldata->res, | |
c970aa85 TM |
1773 | task_setup_data.callback_data = calldata; |
1774 | task = rpc_run_task(&task_setup_data); | |
b39e625b TM |
1775 | if (IS_ERR(task)) |
1776 | return PTR_ERR(task); | |
a49c3c77 TM |
1777 | status = 0; |
1778 | if (wait) | |
1779 | status = rpc_wait_for_completion_task(task); | |
b39e625b | 1780 | rpc_put_task(task); |
a49c3c77 | 1781 | return status; |
9512135d TM |
1782 | out_free_calldata: |
1783 | kfree(calldata); | |
1784 | out: | |
b39e625b TM |
1785 | nfs4_put_open_state(state); |
1786 | nfs4_put_state_owner(sp); | |
9512135d | 1787 | return status; |
1da177e4 LT |
1788 | } |
1789 | ||
dc0b027d | 1790 | static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode) |
02a913a7 TM |
1791 | { |
1792 | struct file *filp; | |
1b45c46c | 1793 | int ret; |
02a913a7 | 1794 | |
1b45c46c | 1795 | /* If the open_intent is for execute, we have an extra check to make */ |
dc0b027d | 1796 | if (fmode & FMODE_EXEC) { |
af22f94a | 1797 | ret = nfs_may_open(state->inode, |
1b45c46c TM |
1798 | state->owner->so_cred, |
1799 | nd->intent.open.flags); | |
1800 | if (ret < 0) | |
1801 | goto out_close; | |
1802 | } | |
4a35bd41 | 1803 | filp = lookup_instantiate_filp(nd, path->dentry, NULL); |
02a913a7 TM |
1804 | if (!IS_ERR(filp)) { |
1805 | struct nfs_open_context *ctx; | |
cd3758e3 | 1806 | ctx = nfs_file_open_context(filp); |
02a913a7 | 1807 | ctx->state = state; |
95cf959b TM |
1808 | return 0; |
1809 | } | |
1b45c46c TM |
1810 | ret = PTR_ERR(filp); |
1811 | out_close: | |
dc0b027d | 1812 | nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE)); |
1b45c46c | 1813 | return ret; |
02a913a7 TM |
1814 | } |
1815 | ||
1816 | struct dentry * | |
1da177e4 LT |
1817 | nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd) |
1818 | { | |
ad389da7 | 1819 | struct path path = { |
4ac91378 | 1820 | .mnt = nd->path.mnt, |
ad389da7 TM |
1821 | .dentry = dentry, |
1822 | }; | |
4ac91378 | 1823 | struct dentry *parent; |
1da177e4 LT |
1824 | struct iattr attr; |
1825 | struct rpc_cred *cred; | |
1826 | struct nfs4_state *state; | |
02a913a7 | 1827 | struct dentry *res; |
dc0b027d | 1828 | fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
1da177e4 LT |
1829 | |
1830 | if (nd->flags & LOOKUP_CREATE) { | |
1831 | attr.ia_mode = nd->intent.open.create_mode; | |
1832 | attr.ia_valid = ATTR_MODE; | |
1833 | if (!IS_POSIXACL(dir)) | |
ce3b0f8d | 1834 | attr.ia_mode &= ~current_umask(); |
1da177e4 LT |
1835 | } else { |
1836 | attr.ia_valid = 0; | |
1837 | BUG_ON(nd->intent.open.flags & O_CREAT); | |
1838 | } | |
1839 | ||
98a8e323 | 1840 | cred = rpc_lookup_cred(); |
1da177e4 | 1841 | if (IS_ERR(cred)) |
02a913a7 | 1842 | return (struct dentry *)cred; |
565277f6 TM |
1843 | parent = dentry->d_parent; |
1844 | /* Protect against concurrent sillydeletes */ | |
1845 | nfs_block_sillyrename(parent); | |
dc0b027d | 1846 | state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred); |
1da177e4 | 1847 | put_rpccred(cred); |
02a913a7 | 1848 | if (IS_ERR(state)) { |
d75340cc | 1849 | if (PTR_ERR(state) == -ENOENT) { |
02a913a7 | 1850 | d_add(dentry, NULL); |
d75340cc TM |
1851 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1852 | } | |
565277f6 | 1853 | nfs_unblock_sillyrename(parent); |
02a913a7 TM |
1854 | return (struct dentry *)state; |
1855 | } | |
24ac23ab | 1856 | res = d_add_unique(dentry, igrab(state->inode)); |
02a913a7 | 1857 | if (res != NULL) |
deee9369 | 1858 | path.dentry = res; |
d75340cc | 1859 | nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir)); |
565277f6 | 1860 | nfs_unblock_sillyrename(parent); |
dc0b027d | 1861 | nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 1862 | return res; |
1da177e4 LT |
1863 | } |
1864 | ||
1865 | int | |
02a913a7 | 1866 | nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd) |
1da177e4 | 1867 | { |
ad389da7 | 1868 | struct path path = { |
4ac91378 | 1869 | .mnt = nd->path.mnt, |
ad389da7 TM |
1870 | .dentry = dentry, |
1871 | }; | |
1da177e4 LT |
1872 | struct rpc_cred *cred; |
1873 | struct nfs4_state *state; | |
dc0b027d | 1874 | fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE); |
1da177e4 | 1875 | |
98a8e323 | 1876 | cred = rpc_lookup_cred(); |
1da177e4 LT |
1877 | if (IS_ERR(cred)) |
1878 | return PTR_ERR(cred); | |
dc0b027d | 1879 | state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred); |
1da177e4 | 1880 | put_rpccred(cred); |
02a913a7 TM |
1881 | if (IS_ERR(state)) { |
1882 | switch (PTR_ERR(state)) { | |
1883 | case -EPERM: | |
1884 | case -EACCES: | |
1885 | case -EDQUOT: | |
1886 | case -ENOSPC: | |
1887 | case -EROFS: | |
1888 | lookup_instantiate_filp(nd, (struct dentry *)state, NULL); | |
1889 | return 1; | |
b87c0adf CL |
1890 | default: |
1891 | goto out_drop; | |
02a913a7 | 1892 | } |
02a913a7 | 1893 | } |
24ac23ab | 1894 | if (state->inode == dentry->d_inode) { |
d75340cc | 1895 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
dc0b027d | 1896 | nfs4_intent_set_file(nd, &path, state, fmode); |
1da177e4 LT |
1897 | return 1; |
1898 | } | |
dc0b027d | 1899 | nfs4_close_sync(&path, state, fmode); |
02a913a7 TM |
1900 | out_drop: |
1901 | d_drop(dentry); | |
1da177e4 LT |
1902 | return 0; |
1903 | } | |
1904 | ||
7fe5c398 TM |
1905 | void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) |
1906 | { | |
1907 | if (ctx->state == NULL) | |
1908 | return; | |
1909 | if (is_sync) | |
1910 | nfs4_close_sync(&ctx->path, ctx->state, ctx->mode); | |
1911 | else | |
1912 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
1913 | } | |
1da177e4 LT |
1914 | |
1915 | static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) | |
1916 | { | |
43652ad5 BH |
1917 | struct nfs4_server_caps_arg args = { |
1918 | .fhandle = fhandle, | |
1919 | }; | |
1da177e4 LT |
1920 | struct nfs4_server_caps_res res = {}; |
1921 | struct rpc_message msg = { | |
1922 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], | |
43652ad5 | 1923 | .rpc_argp = &args, |
1da177e4 LT |
1924 | .rpc_resp = &res, |
1925 | }; | |
1926 | int status; | |
1927 | ||
cccef3b9 | 1928 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1929 | if (status == 0) { |
1930 | memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); | |
1931 | if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) | |
1932 | server->caps |= NFS_CAP_ACLS; | |
1933 | if (res.has_links != 0) | |
1934 | server->caps |= NFS_CAP_HARDLINKS; | |
1935 | if (res.has_symlinks != 0) | |
1936 | server->caps |= NFS_CAP_SYMLINKS; | |
a65318bf TM |
1937 | memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); |
1938 | server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; | |
1939 | server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; | |
1da177e4 LT |
1940 | server->acl_bitmask = res.acl_bitmask; |
1941 | } | |
cccef3b9 | 1942 | |
1da177e4 LT |
1943 | return status; |
1944 | } | |
1945 | ||
55a97593 | 1946 | int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) |
1da177e4 LT |
1947 | { |
1948 | struct nfs4_exception exception = { }; | |
1949 | int err; | |
1950 | do { | |
1951 | err = nfs4_handle_exception(server, | |
1952 | _nfs4_server_capabilities(server, fhandle), | |
1953 | &exception); | |
1954 | } while (exception.retry); | |
1955 | return err; | |
1956 | } | |
1957 | ||
1958 | static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1959 | struct nfs_fsinfo *info) | |
1960 | { | |
1da177e4 LT |
1961 | struct nfs4_lookup_root_arg args = { |
1962 | .bitmask = nfs4_fattr_bitmap, | |
1963 | }; | |
1964 | struct nfs4_lookup_res res = { | |
1965 | .server = server, | |
0e574af1 | 1966 | .fattr = info->fattr, |
1da177e4 LT |
1967 | .fh = fhandle, |
1968 | }; | |
1969 | struct rpc_message msg = { | |
1970 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], | |
1971 | .rpc_argp = &args, | |
1972 | .rpc_resp = &res, | |
1973 | }; | |
0e574af1 | 1974 | nfs_fattr_init(info->fattr); |
cccef3b9 | 1975 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
1976 | } |
1977 | ||
1978 | static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, | |
1979 | struct nfs_fsinfo *info) | |
1980 | { | |
1981 | struct nfs4_exception exception = { }; | |
1982 | int err; | |
1983 | do { | |
1984 | err = nfs4_handle_exception(server, | |
1985 | _nfs4_lookup_root(server, fhandle, info), | |
1986 | &exception); | |
1987 | } while (exception.retry); | |
1988 | return err; | |
1989 | } | |
1990 | ||
54ceac45 DH |
1991 | /* |
1992 | * get the file handle for the "/" directory on the server | |
1993 | */ | |
1da177e4 | 1994 | static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, |
54ceac45 | 1995 | struct nfs_fsinfo *info) |
1da177e4 | 1996 | { |
1da177e4 LT |
1997 | int status; |
1998 | ||
1da177e4 | 1999 | status = nfs4_lookup_root(server, fhandle, info); |
1da177e4 LT |
2000 | if (status == 0) |
2001 | status = nfs4_server_capabilities(server, fhandle); | |
2002 | if (status == 0) | |
2003 | status = nfs4_do_fsinfo(server, fhandle, info); | |
c12e87f4 | 2004 | return nfs4_map_errors(status); |
1da177e4 LT |
2005 | } |
2006 | ||
6b97fd3d MN |
2007 | /* |
2008 | * Get locations and (maybe) other attributes of a referral. | |
2009 | * Note that we'll actually follow the referral later when | |
2010 | * we detect fsid mismatch in inode revalidation | |
2011 | */ | |
56659e99 | 2012 | static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle) |
6b97fd3d MN |
2013 | { |
2014 | int status = -ENOMEM; | |
2015 | struct page *page = NULL; | |
2016 | struct nfs4_fs_locations *locations = NULL; | |
6b97fd3d MN |
2017 | |
2018 | page = alloc_page(GFP_KERNEL); | |
2019 | if (page == NULL) | |
2020 | goto out; | |
2021 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2022 | if (locations == NULL) | |
2023 | goto out; | |
2024 | ||
c228fd3a | 2025 | status = nfs4_proc_fs_locations(dir, name, locations, page); |
6b97fd3d MN |
2026 | if (status != 0) |
2027 | goto out; | |
2028 | /* Make sure server returned a different fsid for the referral */ | |
2029 | if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { | |
3110ff80 | 2030 | dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name); |
6b97fd3d MN |
2031 | status = -EIO; |
2032 | goto out; | |
2033 | } | |
2034 | ||
2035 | memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); | |
2036 | fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL; | |
2037 | if (!fattr->mode) | |
2038 | fattr->mode = S_IFDIR; | |
2039 | memset(fhandle, 0, sizeof(struct nfs_fh)); | |
2040 | out: | |
2041 | if (page) | |
2042 | __free_page(page); | |
2043 | if (locations) | |
2044 | kfree(locations); | |
2045 | return status; | |
2046 | } | |
2047 | ||
1da177e4 LT |
2048 | static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2049 | { | |
2050 | struct nfs4_getattr_arg args = { | |
2051 | .fh = fhandle, | |
2052 | .bitmask = server->attr_bitmask, | |
2053 | }; | |
2054 | struct nfs4_getattr_res res = { | |
2055 | .fattr = fattr, | |
2056 | .server = server, | |
2057 | }; | |
2058 | struct rpc_message msg = { | |
2059 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], | |
2060 | .rpc_argp = &args, | |
2061 | .rpc_resp = &res, | |
2062 | }; | |
2063 | ||
0e574af1 | 2064 | nfs_fattr_init(fattr); |
cccef3b9 | 2065 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2066 | } |
2067 | ||
2068 | static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2069 | { | |
2070 | struct nfs4_exception exception = { }; | |
2071 | int err; | |
2072 | do { | |
2073 | err = nfs4_handle_exception(server, | |
2074 | _nfs4_proc_getattr(server, fhandle, fattr), | |
2075 | &exception); | |
2076 | } while (exception.retry); | |
2077 | return err; | |
2078 | } | |
2079 | ||
2080 | /* | |
2081 | * The file is not closed if it is opened due to the a request to change | |
2082 | * the size of the file. The open call will not be needed once the | |
2083 | * VFS layer lookup-intents are implemented. | |
2084 | * | |
2085 | * Close is called when the inode is destroyed. | |
2086 | * If we haven't opened the file for O_WRONLY, we | |
2087 | * need to in the size_change case to obtain a stateid. | |
2088 | * | |
2089 | * Got race? | |
2090 | * Because OPEN is always done by name in nfsv4, it is | |
2091 | * possible that we opened a different file by the same | |
2092 | * name. We can recognize this race condition, but we | |
2093 | * can't do anything about it besides returning an error. | |
2094 | * | |
2095 | * This will be fixed with VFS changes (lookup-intent). | |
2096 | */ | |
2097 | static int | |
2098 | nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, | |
2099 | struct iattr *sattr) | |
2100 | { | |
08e9eac4 | 2101 | struct inode *inode = dentry->d_inode; |
659bfcd6 | 2102 | struct rpc_cred *cred = NULL; |
d530838b | 2103 | struct nfs4_state *state = NULL; |
1da177e4 LT |
2104 | int status; |
2105 | ||
0e574af1 | 2106 | nfs_fattr_init(fattr); |
1da177e4 | 2107 | |
d530838b | 2108 | /* Search for an existing open(O_WRITE) file */ |
659bfcd6 TM |
2109 | if (sattr->ia_valid & ATTR_FILE) { |
2110 | struct nfs_open_context *ctx; | |
2111 | ||
2112 | ctx = nfs_file_open_context(sattr->ia_file); | |
504e5189 NB |
2113 | if (ctx) { |
2114 | cred = ctx->cred; | |
2115 | state = ctx->state; | |
2116 | } | |
659bfcd6 | 2117 | } |
08e9eac4 | 2118 | |
659bfcd6 | 2119 | status = nfs4_do_setattr(inode, cred, fattr, sattr, state); |
65e4308d TM |
2120 | if (status == 0) |
2121 | nfs_setattr_update_inode(inode, sattr); | |
1da177e4 LT |
2122 | return status; |
2123 | } | |
2124 | ||
56659e99 TM |
2125 | static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh, |
2126 | const struct qstr *name, struct nfs_fh *fhandle, | |
2b3de441 DH |
2127 | struct nfs_fattr *fattr) |
2128 | { | |
2129 | int status; | |
2130 | struct nfs4_lookup_arg args = { | |
2131 | .bitmask = server->attr_bitmask, | |
2132 | .dir_fh = dirfh, | |
2133 | .name = name, | |
2134 | }; | |
2135 | struct nfs4_lookup_res res = { | |
2136 | .server = server, | |
2137 | .fattr = fattr, | |
2138 | .fh = fhandle, | |
2139 | }; | |
2140 | struct rpc_message msg = { | |
2141 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], | |
2142 | .rpc_argp = &args, | |
2143 | .rpc_resp = &res, | |
2144 | }; | |
2145 | ||
2146 | nfs_fattr_init(fattr); | |
2147 | ||
2148 | dprintk("NFS call lookupfh %s\n", name->name); | |
cccef3b9 | 2149 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
2b3de441 | 2150 | dprintk("NFS reply lookupfh: %d\n", status); |
2b3de441 DH |
2151 | return status; |
2152 | } | |
2153 | ||
2154 | static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh, | |
2155 | struct qstr *name, struct nfs_fh *fhandle, | |
2156 | struct nfs_fattr *fattr) | |
2157 | { | |
2158 | struct nfs4_exception exception = { }; | |
2159 | int err; | |
2160 | do { | |
4e56e082 TM |
2161 | err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr); |
2162 | /* FIXME: !!!! */ | |
2163 | if (err == -NFS4ERR_MOVED) { | |
2164 | err = -EREMOTE; | |
2165 | break; | |
2166 | } | |
2167 | err = nfs4_handle_exception(server, err, &exception); | |
2b3de441 DH |
2168 | } while (exception.retry); |
2169 | return err; | |
2170 | } | |
2171 | ||
56659e99 | 2172 | static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, |
1da177e4 LT |
2173 | struct nfs_fh *fhandle, struct nfs_fattr *fattr) |
2174 | { | |
4e56e082 | 2175 | int status; |
1da177e4 LT |
2176 | |
2177 | dprintk("NFS call lookup %s\n", name->name); | |
4e56e082 | 2178 | status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr); |
6b97fd3d MN |
2179 | if (status == -NFS4ERR_MOVED) |
2180 | status = nfs4_get_referral(dir, name, fattr, fhandle); | |
1da177e4 LT |
2181 | dprintk("NFS reply lookup: %d\n", status); |
2182 | return status; | |
2183 | } | |
2184 | ||
2185 | static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr) | |
2186 | { | |
2187 | struct nfs4_exception exception = { }; | |
2188 | int err; | |
2189 | do { | |
2190 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2191 | _nfs4_proc_lookup(dir, name, fhandle, fattr), | |
2192 | &exception); | |
2193 | } while (exception.retry); | |
2194 | return err; | |
2195 | } | |
2196 | ||
2197 | static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2198 | { | |
76b32999 TM |
2199 | struct nfs_server *server = NFS_SERVER(inode); |
2200 | struct nfs_fattr fattr; | |
1da177e4 LT |
2201 | struct nfs4_accessargs args = { |
2202 | .fh = NFS_FH(inode), | |
76b32999 TM |
2203 | .bitmask = server->attr_bitmask, |
2204 | }; | |
2205 | struct nfs4_accessres res = { | |
2206 | .server = server, | |
2207 | .fattr = &fattr, | |
1da177e4 | 2208 | }; |
1da177e4 LT |
2209 | struct rpc_message msg = { |
2210 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], | |
2211 | .rpc_argp = &args, | |
2212 | .rpc_resp = &res, | |
2213 | .rpc_cred = entry->cred, | |
2214 | }; | |
2215 | int mode = entry->mask; | |
2216 | int status; | |
2217 | ||
2218 | /* | |
2219 | * Determine which access bits we want to ask for... | |
2220 | */ | |
2221 | if (mode & MAY_READ) | |
2222 | args.access |= NFS4_ACCESS_READ; | |
2223 | if (S_ISDIR(inode->i_mode)) { | |
2224 | if (mode & MAY_WRITE) | |
2225 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; | |
2226 | if (mode & MAY_EXEC) | |
2227 | args.access |= NFS4_ACCESS_LOOKUP; | |
2228 | } else { | |
2229 | if (mode & MAY_WRITE) | |
2230 | args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; | |
2231 | if (mode & MAY_EXEC) | |
2232 | args.access |= NFS4_ACCESS_EXECUTE; | |
2233 | } | |
76b32999 | 2234 | nfs_fattr_init(&fattr); |
cccef3b9 | 2235 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2236 | if (!status) { |
2237 | entry->mask = 0; | |
2238 | if (res.access & NFS4_ACCESS_READ) | |
2239 | entry->mask |= MAY_READ; | |
2240 | if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE)) | |
2241 | entry->mask |= MAY_WRITE; | |
2242 | if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE)) | |
2243 | entry->mask |= MAY_EXEC; | |
76b32999 | 2244 | nfs_refresh_inode(inode, &fattr); |
1da177e4 LT |
2245 | } |
2246 | return status; | |
2247 | } | |
2248 | ||
2249 | static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) | |
2250 | { | |
2251 | struct nfs4_exception exception = { }; | |
2252 | int err; | |
2253 | do { | |
2254 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2255 | _nfs4_proc_access(inode, entry), | |
2256 | &exception); | |
2257 | } while (exception.retry); | |
2258 | return err; | |
2259 | } | |
2260 | ||
2261 | /* | |
2262 | * TODO: For the time being, we don't try to get any attributes | |
2263 | * along with any of the zero-copy operations READ, READDIR, | |
2264 | * READLINK, WRITE. | |
2265 | * | |
2266 | * In the case of the first three, we want to put the GETATTR | |
2267 | * after the read-type operation -- this is because it is hard | |
2268 | * to predict the length of a GETATTR response in v4, and thus | |
2269 | * align the READ data correctly. This means that the GETATTR | |
2270 | * may end up partially falling into the page cache, and we should | |
2271 | * shift it into the 'tail' of the xdr_buf before processing. | |
2272 | * To do this efficiently, we need to know the total length | |
2273 | * of data received, which doesn't seem to be available outside | |
2274 | * of the RPC layer. | |
2275 | * | |
2276 | * In the case of WRITE, we also want to put the GETATTR after | |
2277 | * the operation -- in this case because we want to make sure | |
2278 | * we get the post-operation mtime and size. This means that | |
2279 | * we can't use xdr_encode_pages() as written: we need a variant | |
2280 | * of it which would leave room in the 'tail' iovec. | |
2281 | * | |
2282 | * Both of these changes to the XDR layer would in fact be quite | |
2283 | * minor, but I decided to leave them for a subsequent patch. | |
2284 | */ | |
2285 | static int _nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2286 | unsigned int pgbase, unsigned int pglen) | |
2287 | { | |
2288 | struct nfs4_readlink args = { | |
2289 | .fh = NFS_FH(inode), | |
2290 | .pgbase = pgbase, | |
2291 | .pglen = pglen, | |
2292 | .pages = &page, | |
2293 | }; | |
f50c7000 | 2294 | struct nfs4_readlink_res res; |
1da177e4 LT |
2295 | struct rpc_message msg = { |
2296 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], | |
2297 | .rpc_argp = &args, | |
f50c7000 | 2298 | .rpc_resp = &res, |
1da177e4 LT |
2299 | }; |
2300 | ||
cccef3b9 | 2301 | return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
1da177e4 LT |
2302 | } |
2303 | ||
2304 | static int nfs4_proc_readlink(struct inode *inode, struct page *page, | |
2305 | unsigned int pgbase, unsigned int pglen) | |
2306 | { | |
2307 | struct nfs4_exception exception = { }; | |
2308 | int err; | |
2309 | do { | |
2310 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2311 | _nfs4_proc_readlink(inode, page, pgbase, pglen), | |
2312 | &exception); | |
2313 | } while (exception.retry); | |
2314 | return err; | |
2315 | } | |
2316 | ||
1da177e4 LT |
2317 | /* |
2318 | * Got race? | |
2319 | * We will need to arrange for the VFS layer to provide an atomic open. | |
2320 | * Until then, this create/open method is prone to inefficiency and race | |
2321 | * conditions due to the lookup, create, and open VFS calls from sys_open() | |
2322 | * placed on the wire. | |
2323 | * | |
2324 | * Given the above sorry state of affairs, I'm simply sending an OPEN. | |
2325 | * The file will be opened again in the subsequent VFS open call | |
2326 | * (nfs4_proc_file_open). | |
2327 | * | |
2328 | * The open for read will just hang around to be used by any process that | |
2329 | * opens the file O_RDONLY. This will all be resolved with the VFS changes. | |
2330 | */ | |
2331 | ||
2332 | static int | |
2333 | nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, | |
02a913a7 | 2334 | int flags, struct nameidata *nd) |
1da177e4 | 2335 | { |
ad389da7 | 2336 | struct path path = { |
4ac91378 | 2337 | .mnt = nd->path.mnt, |
ad389da7 TM |
2338 | .dentry = dentry, |
2339 | }; | |
1da177e4 LT |
2340 | struct nfs4_state *state; |
2341 | struct rpc_cred *cred; | |
dc0b027d | 2342 | fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE); |
1da177e4 LT |
2343 | int status = 0; |
2344 | ||
98a8e323 | 2345 | cred = rpc_lookup_cred(); |
1da177e4 LT |
2346 | if (IS_ERR(cred)) { |
2347 | status = PTR_ERR(cred); | |
2348 | goto out; | |
2349 | } | |
dc0b027d | 2350 | state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred); |
d4d9cdcb | 2351 | d_drop(dentry); |
1da177e4 LT |
2352 | if (IS_ERR(state)) { |
2353 | status = PTR_ERR(state); | |
659bfcd6 | 2354 | goto out_putcred; |
1da177e4 | 2355 | } |
d4d9cdcb | 2356 | d_add(dentry, igrab(state->inode)); |
d75340cc | 2357 | nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); |
1da177e4 LT |
2358 | if (flags & O_EXCL) { |
2359 | struct nfs_fattr fattr; | |
659bfcd6 | 2360 | status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state); |
02a913a7 | 2361 | if (status == 0) |
65e4308d | 2362 | nfs_setattr_update_inode(state->inode, sattr); |
aa53ed54 | 2363 | nfs_post_op_update_inode(state->inode, &fattr); |
02a913a7 | 2364 | } |
ad389da7 | 2365 | if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0) |
dc0b027d | 2366 | status = nfs4_intent_set_file(nd, &path, state, fmode); |
02a913a7 | 2367 | else |
dc0b027d | 2368 | nfs4_close_sync(&path, state, fmode); |
659bfcd6 TM |
2369 | out_putcred: |
2370 | put_rpccred(cred); | |
1da177e4 LT |
2371 | out: |
2372 | return status; | |
2373 | } | |
2374 | ||
2375 | static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2376 | { | |
16e42959 | 2377 | struct nfs_server *server = NFS_SERVER(dir); |
4fdc17b2 | 2378 | struct nfs_removeargs args = { |
1da177e4 | 2379 | .fh = NFS_FH(dir), |
4fdc17b2 TM |
2380 | .name.len = name->len, |
2381 | .name.name = name->name, | |
16e42959 TM |
2382 | .bitmask = server->attr_bitmask, |
2383 | }; | |
4fdc17b2 | 2384 | struct nfs_removeres res = { |
16e42959 | 2385 | .server = server, |
1da177e4 | 2386 | }; |
1da177e4 | 2387 | struct rpc_message msg = { |
4fdc17b2 TM |
2388 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], |
2389 | .rpc_argp = &args, | |
2390 | .rpc_resp = &res, | |
1da177e4 LT |
2391 | }; |
2392 | int status; | |
2393 | ||
4fdc17b2 | 2394 | nfs_fattr_init(&res.dir_attr); |
cccef3b9 | 2395 | status = nfs4_call_sync(server, &msg, &args, &res, 1); |
16e42959 TM |
2396 | if (status == 0) { |
2397 | update_changeattr(dir, &res.cinfo); | |
4fdc17b2 | 2398 | nfs_post_op_update_inode(dir, &res.dir_attr); |
16e42959 | 2399 | } |
1da177e4 LT |
2400 | return status; |
2401 | } | |
2402 | ||
2403 | static int nfs4_proc_remove(struct inode *dir, struct qstr *name) | |
2404 | { | |
2405 | struct nfs4_exception exception = { }; | |
2406 | int err; | |
2407 | do { | |
2408 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2409 | _nfs4_proc_remove(dir, name), | |
2410 | &exception); | |
2411 | } while (exception.retry); | |
2412 | return err; | |
2413 | } | |
2414 | ||
e4eff1a6 | 2415 | static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) |
1da177e4 | 2416 | { |
e4eff1a6 TM |
2417 | struct nfs_server *server = NFS_SERVER(dir); |
2418 | struct nfs_removeargs *args = msg->rpc_argp; | |
2419 | struct nfs_removeres *res = msg->rpc_resp; | |
1da177e4 | 2420 | |
a65318bf | 2421 | args->bitmask = server->cache_consistency_bitmask; |
e4eff1a6 | 2422 | res->server = server; |
1da177e4 | 2423 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; |
1da177e4 LT |
2424 | } |
2425 | ||
e4eff1a6 | 2426 | static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) |
1da177e4 | 2427 | { |
e4eff1a6 TM |
2428 | struct nfs_removeres *res = task->tk_msg.rpc_resp; |
2429 | ||
472cfbd9 | 2430 | nfs4_sequence_done(res->server, &res->seq_res, task->tk_status); |
9e33bed5 | 2431 | if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) |
e4eff1a6 | 2432 | return 0; |
472cfbd9 | 2433 | nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res); |
e4eff1a6 TM |
2434 | update_changeattr(dir, &res->cinfo); |
2435 | nfs_post_op_update_inode(dir, &res->dir_attr); | |
2436 | return 1; | |
1da177e4 LT |
2437 | } |
2438 | ||
2439 | static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2440 | struct inode *new_dir, struct qstr *new_name) | |
2441 | { | |
6caf2c82 | 2442 | struct nfs_server *server = NFS_SERVER(old_dir); |
1da177e4 LT |
2443 | struct nfs4_rename_arg arg = { |
2444 | .old_dir = NFS_FH(old_dir), | |
2445 | .new_dir = NFS_FH(new_dir), | |
2446 | .old_name = old_name, | |
2447 | .new_name = new_name, | |
6caf2c82 TM |
2448 | .bitmask = server->attr_bitmask, |
2449 | }; | |
2450 | struct nfs_fattr old_fattr, new_fattr; | |
2451 | struct nfs4_rename_res res = { | |
2452 | .server = server, | |
2453 | .old_fattr = &old_fattr, | |
2454 | .new_fattr = &new_fattr, | |
1da177e4 | 2455 | }; |
1da177e4 LT |
2456 | struct rpc_message msg = { |
2457 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], | |
2458 | .rpc_argp = &arg, | |
2459 | .rpc_resp = &res, | |
2460 | }; | |
2461 | int status; | |
2462 | ||
6caf2c82 TM |
2463 | nfs_fattr_init(res.old_fattr); |
2464 | nfs_fattr_init(res.new_fattr); | |
cccef3b9 | 2465 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
1da177e4 LT |
2466 | |
2467 | if (!status) { | |
2468 | update_changeattr(old_dir, &res.old_cinfo); | |
6caf2c82 | 2469 | nfs_post_op_update_inode(old_dir, res.old_fattr); |
1da177e4 | 2470 | update_changeattr(new_dir, &res.new_cinfo); |
6caf2c82 | 2471 | nfs_post_op_update_inode(new_dir, res.new_fattr); |
1da177e4 LT |
2472 | } |
2473 | return status; | |
2474 | } | |
2475 | ||
2476 | static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, | |
2477 | struct inode *new_dir, struct qstr *new_name) | |
2478 | { | |
2479 | struct nfs4_exception exception = { }; | |
2480 | int err; | |
2481 | do { | |
2482 | err = nfs4_handle_exception(NFS_SERVER(old_dir), | |
2483 | _nfs4_proc_rename(old_dir, old_name, | |
2484 | new_dir, new_name), | |
2485 | &exception); | |
2486 | } while (exception.retry); | |
2487 | return err; | |
2488 | } | |
2489 | ||
2490 | static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2491 | { | |
91ba2eee | 2492 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 LT |
2493 | struct nfs4_link_arg arg = { |
2494 | .fh = NFS_FH(inode), | |
2495 | .dir_fh = NFS_FH(dir), | |
2496 | .name = name, | |
91ba2eee TM |
2497 | .bitmask = server->attr_bitmask, |
2498 | }; | |
2499 | struct nfs_fattr fattr, dir_attr; | |
2500 | struct nfs4_link_res res = { | |
2501 | .server = server, | |
2502 | .fattr = &fattr, | |
2503 | .dir_attr = &dir_attr, | |
1da177e4 | 2504 | }; |
1da177e4 LT |
2505 | struct rpc_message msg = { |
2506 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], | |
2507 | .rpc_argp = &arg, | |
91ba2eee | 2508 | .rpc_resp = &res, |
1da177e4 LT |
2509 | }; |
2510 | int status; | |
2511 | ||
91ba2eee TM |
2512 | nfs_fattr_init(res.fattr); |
2513 | nfs_fattr_init(res.dir_attr); | |
cccef3b9 | 2514 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
91ba2eee TM |
2515 | if (!status) { |
2516 | update_changeattr(dir, &res.cinfo); | |
2517 | nfs_post_op_update_inode(dir, res.dir_attr); | |
73a3d07c | 2518 | nfs_post_op_update_inode(inode, res.fattr); |
91ba2eee | 2519 | } |
1da177e4 LT |
2520 | |
2521 | return status; | |
2522 | } | |
2523 | ||
2524 | static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) | |
2525 | { | |
2526 | struct nfs4_exception exception = { }; | |
2527 | int err; | |
2528 | do { | |
2529 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
2530 | _nfs4_proc_link(inode, dir, name), | |
2531 | &exception); | |
2532 | } while (exception.retry); | |
2533 | return err; | |
2534 | } | |
2535 | ||
57dc9a57 TM |
2536 | struct nfs4_createdata { |
2537 | struct rpc_message msg; | |
2538 | struct nfs4_create_arg arg; | |
2539 | struct nfs4_create_res res; | |
2540 | struct nfs_fh fh; | |
2541 | struct nfs_fattr fattr; | |
2542 | struct nfs_fattr dir_fattr; | |
2543 | }; | |
2544 | ||
2545 | static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, | |
2546 | struct qstr *name, struct iattr *sattr, u32 ftype) | |
2547 | { | |
2548 | struct nfs4_createdata *data; | |
2549 | ||
2550 | data = kzalloc(sizeof(*data), GFP_KERNEL); | |
2551 | if (data != NULL) { | |
2552 | struct nfs_server *server = NFS_SERVER(dir); | |
2553 | ||
2554 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; | |
2555 | data->msg.rpc_argp = &data->arg; | |
2556 | data->msg.rpc_resp = &data->res; | |
2557 | data->arg.dir_fh = NFS_FH(dir); | |
2558 | data->arg.server = server; | |
2559 | data->arg.name = name; | |
2560 | data->arg.attrs = sattr; | |
2561 | data->arg.ftype = ftype; | |
2562 | data->arg.bitmask = server->attr_bitmask; | |
2563 | data->res.server = server; | |
2564 | data->res.fh = &data->fh; | |
2565 | data->res.fattr = &data->fattr; | |
2566 | data->res.dir_fattr = &data->dir_fattr; | |
2567 | nfs_fattr_init(data->res.fattr); | |
2568 | nfs_fattr_init(data->res.dir_fattr); | |
2569 | } | |
2570 | return data; | |
2571 | } | |
2572 | ||
2573 | static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) | |
2574 | { | |
cccef3b9 AA |
2575 | int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg, |
2576 | &data->arg, &data->res, 1); | |
57dc9a57 TM |
2577 | if (status == 0) { |
2578 | update_changeattr(dir, &data->res.dir_cinfo); | |
2579 | nfs_post_op_update_inode(dir, data->res.dir_fattr); | |
2580 | status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); | |
2581 | } | |
2582 | return status; | |
2583 | } | |
2584 | ||
2585 | static void nfs4_free_createdata(struct nfs4_createdata *data) | |
2586 | { | |
2587 | kfree(data); | |
2588 | } | |
2589 | ||
4f390c15 | 2590 | static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2591 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 | 2592 | { |
57dc9a57 TM |
2593 | struct nfs4_createdata *data; |
2594 | int status = -ENAMETOOLONG; | |
1da177e4 | 2595 | |
94a6d753 | 2596 | if (len > NFS4_MAXPATHLEN) |
57dc9a57 | 2597 | goto out; |
4f390c15 | 2598 | |
57dc9a57 TM |
2599 | status = -ENOMEM; |
2600 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); | |
2601 | if (data == NULL) | |
2602 | goto out; | |
2603 | ||
2604 | data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; | |
2605 | data->arg.u.symlink.pages = &page; | |
2606 | data->arg.u.symlink.len = len; | |
1da177e4 | 2607 | |
57dc9a57 TM |
2608 | status = nfs4_do_create(dir, dentry, data); |
2609 | ||
2610 | nfs4_free_createdata(data); | |
2611 | out: | |
1da177e4 LT |
2612 | return status; |
2613 | } | |
2614 | ||
4f390c15 | 2615 | static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, |
94a6d753 | 2616 | struct page *page, unsigned int len, struct iattr *sattr) |
1da177e4 LT |
2617 | { |
2618 | struct nfs4_exception exception = { }; | |
2619 | int err; | |
2620 | do { | |
2621 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
94a6d753 CL |
2622 | _nfs4_proc_symlink(dir, dentry, page, |
2623 | len, sattr), | |
1da177e4 LT |
2624 | &exception); |
2625 | } while (exception.retry); | |
2626 | return err; | |
2627 | } | |
2628 | ||
2629 | static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2630 | struct iattr *sattr) | |
2631 | { | |
57dc9a57 TM |
2632 | struct nfs4_createdata *data; |
2633 | int status = -ENOMEM; | |
1da177e4 | 2634 | |
57dc9a57 TM |
2635 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); |
2636 | if (data == NULL) | |
2637 | goto out; | |
2638 | ||
2639 | status = nfs4_do_create(dir, dentry, data); | |
2640 | ||
2641 | nfs4_free_createdata(data); | |
2642 | out: | |
1da177e4 LT |
2643 | return status; |
2644 | } | |
2645 | ||
2646 | static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, | |
2647 | struct iattr *sattr) | |
2648 | { | |
2649 | struct nfs4_exception exception = { }; | |
2650 | int err; | |
2651 | do { | |
2652 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2653 | _nfs4_proc_mkdir(dir, dentry, sattr), | |
2654 | &exception); | |
2655 | } while (exception.retry); | |
2656 | return err; | |
2657 | } | |
2658 | ||
2659 | static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2660 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2661 | { | |
2662 | struct inode *dir = dentry->d_inode; | |
2663 | struct nfs4_readdir_arg args = { | |
2664 | .fh = NFS_FH(dir), | |
2665 | .pages = &page, | |
2666 | .pgbase = 0, | |
2667 | .count = count, | |
a65318bf | 2668 | .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask, |
1da177e4 LT |
2669 | }; |
2670 | struct nfs4_readdir_res res; | |
2671 | struct rpc_message msg = { | |
2672 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], | |
2673 | .rpc_argp = &args, | |
2674 | .rpc_resp = &res, | |
2675 | .rpc_cred = cred, | |
2676 | }; | |
2677 | int status; | |
2678 | ||
3110ff80 | 2679 | dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__, |
eadf4598 TM |
2680 | dentry->d_parent->d_name.name, |
2681 | dentry->d_name.name, | |
2682 | (unsigned long long)cookie); | |
1da177e4 LT |
2683 | nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args); |
2684 | res.pgbase = args.pgbase; | |
cccef3b9 | 2685 | status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0); |
1da177e4 LT |
2686 | if (status == 0) |
2687 | memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE); | |
c4812998 TM |
2688 | |
2689 | nfs_invalidate_atime(dir); | |
2690 | ||
3110ff80 | 2691 | dprintk("%s: returns %d\n", __func__, status); |
1da177e4 LT |
2692 | return status; |
2693 | } | |
2694 | ||
2695 | static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, | |
2696 | u64 cookie, struct page *page, unsigned int count, int plus) | |
2697 | { | |
2698 | struct nfs4_exception exception = { }; | |
2699 | int err; | |
2700 | do { | |
2701 | err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), | |
2702 | _nfs4_proc_readdir(dentry, cred, cookie, | |
2703 | page, count, plus), | |
2704 | &exception); | |
2705 | } while (exception.retry); | |
2706 | return err; | |
2707 | } | |
2708 | ||
2709 | static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2710 | struct iattr *sattr, dev_t rdev) | |
2711 | { | |
57dc9a57 TM |
2712 | struct nfs4_createdata *data; |
2713 | int mode = sattr->ia_mode; | |
2714 | int status = -ENOMEM; | |
1da177e4 LT |
2715 | |
2716 | BUG_ON(!(sattr->ia_valid & ATTR_MODE)); | |
2717 | BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode)); | |
57dc9a57 TM |
2718 | |
2719 | data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); | |
2720 | if (data == NULL) | |
2721 | goto out; | |
2722 | ||
1da177e4 | 2723 | if (S_ISFIFO(mode)) |
57dc9a57 | 2724 | data->arg.ftype = NF4FIFO; |
1da177e4 | 2725 | else if (S_ISBLK(mode)) { |
57dc9a57 TM |
2726 | data->arg.ftype = NF4BLK; |
2727 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2728 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 LT |
2729 | } |
2730 | else if (S_ISCHR(mode)) { | |
57dc9a57 TM |
2731 | data->arg.ftype = NF4CHR; |
2732 | data->arg.u.device.specdata1 = MAJOR(rdev); | |
2733 | data->arg.u.device.specdata2 = MINOR(rdev); | |
1da177e4 | 2734 | } |
1da177e4 | 2735 | |
57dc9a57 TM |
2736 | status = nfs4_do_create(dir, dentry, data); |
2737 | ||
2738 | nfs4_free_createdata(data); | |
2739 | out: | |
1da177e4 LT |
2740 | return status; |
2741 | } | |
2742 | ||
2743 | static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, | |
2744 | struct iattr *sattr, dev_t rdev) | |
2745 | { | |
2746 | struct nfs4_exception exception = { }; | |
2747 | int err; | |
2748 | do { | |
2749 | err = nfs4_handle_exception(NFS_SERVER(dir), | |
2750 | _nfs4_proc_mknod(dir, dentry, sattr, rdev), | |
2751 | &exception); | |
2752 | } while (exception.retry); | |
2753 | return err; | |
2754 | } | |
2755 | ||
2756 | static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, | |
2757 | struct nfs_fsstat *fsstat) | |
2758 | { | |
2759 | struct nfs4_statfs_arg args = { | |
2760 | .fh = fhandle, | |
2761 | .bitmask = server->attr_bitmask, | |
2762 | }; | |
24ad148a BH |
2763 | struct nfs4_statfs_res res = { |
2764 | .fsstat = fsstat, | |
2765 | }; | |
1da177e4 LT |
2766 | struct rpc_message msg = { |
2767 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], | |
2768 | .rpc_argp = &args, | |
24ad148a | 2769 | .rpc_resp = &res, |
1da177e4 LT |
2770 | }; |
2771 | ||
0e574af1 | 2772 | nfs_fattr_init(fsstat->fattr); |
cccef3b9 | 2773 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2774 | } |
2775 | ||
2776 | static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) | |
2777 | { | |
2778 | struct nfs4_exception exception = { }; | |
2779 | int err; | |
2780 | do { | |
2781 | err = nfs4_handle_exception(server, | |
2782 | _nfs4_proc_statfs(server, fhandle, fsstat), | |
2783 | &exception); | |
2784 | } while (exception.retry); | |
2785 | return err; | |
2786 | } | |
2787 | ||
2788 | static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, | |
2789 | struct nfs_fsinfo *fsinfo) | |
2790 | { | |
2791 | struct nfs4_fsinfo_arg args = { | |
2792 | .fh = fhandle, | |
2793 | .bitmask = server->attr_bitmask, | |
2794 | }; | |
3dda5e43 BH |
2795 | struct nfs4_fsinfo_res res = { |
2796 | .fsinfo = fsinfo, | |
2797 | }; | |
1da177e4 LT |
2798 | struct rpc_message msg = { |
2799 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], | |
2800 | .rpc_argp = &args, | |
3dda5e43 | 2801 | .rpc_resp = &res, |
1da177e4 LT |
2802 | }; |
2803 | ||
cccef3b9 | 2804 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2805 | } |
2806 | ||
2807 | static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2808 | { | |
2809 | struct nfs4_exception exception = { }; | |
2810 | int err; | |
2811 | ||
2812 | do { | |
2813 | err = nfs4_handle_exception(server, | |
2814 | _nfs4_do_fsinfo(server, fhandle, fsinfo), | |
2815 | &exception); | |
2816 | } while (exception.retry); | |
2817 | return err; | |
2818 | } | |
2819 | ||
2820 | static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) | |
2821 | { | |
0e574af1 | 2822 | nfs_fattr_init(fsinfo->fattr); |
1da177e4 LT |
2823 | return nfs4_do_fsinfo(server, fhandle, fsinfo); |
2824 | } | |
2825 | ||
2826 | static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2827 | struct nfs_pathconf *pathconf) | |
2828 | { | |
2829 | struct nfs4_pathconf_arg args = { | |
2830 | .fh = fhandle, | |
2831 | .bitmask = server->attr_bitmask, | |
2832 | }; | |
d45b2989 BH |
2833 | struct nfs4_pathconf_res res = { |
2834 | .pathconf = pathconf, | |
2835 | }; | |
1da177e4 LT |
2836 | struct rpc_message msg = { |
2837 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], | |
2838 | .rpc_argp = &args, | |
d45b2989 | 2839 | .rpc_resp = &res, |
1da177e4 LT |
2840 | }; |
2841 | ||
2842 | /* None of the pathconf attributes are mandatory to implement */ | |
2843 | if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { | |
2844 | memset(pathconf, 0, sizeof(*pathconf)); | |
2845 | return 0; | |
2846 | } | |
2847 | ||
0e574af1 | 2848 | nfs_fattr_init(pathconf->fattr); |
cccef3b9 | 2849 | return nfs4_call_sync(server, &msg, &args, &res, 0); |
1da177e4 LT |
2850 | } |
2851 | ||
2852 | static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, | |
2853 | struct nfs_pathconf *pathconf) | |
2854 | { | |
2855 | struct nfs4_exception exception = { }; | |
2856 | int err; | |
2857 | ||
2858 | do { | |
2859 | err = nfs4_handle_exception(server, | |
2860 | _nfs4_proc_pathconf(server, fhandle, pathconf), | |
2861 | &exception); | |
2862 | } while (exception.retry); | |
2863 | return err; | |
2864 | } | |
2865 | ||
ec06c096 | 2866 | static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) |
1da177e4 | 2867 | { |
ec06c096 | 2868 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2869 | |
f11c88af AA |
2870 | dprintk("--> %s\n", __func__); |
2871 | ||
2872 | /* nfs4_sequence_free_slot called in the read rpc_call_done */ | |
2873 | nfs4_sequence_done(server, &data->res.seq_res, task->tk_status); | |
2874 | ||
9e33bed5 | 2875 | if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { |
1da177e4 | 2876 | rpc_restart_call(task); |
ec06c096 | 2877 | return -EAGAIN; |
1da177e4 | 2878 | } |
8850df99 TM |
2879 | |
2880 | nfs_invalidate_atime(data->inode); | |
1da177e4 | 2881 | if (task->tk_status > 0) |
ec06c096 TM |
2882 | renew_lease(server, data->timestamp); |
2883 | return 0; | |
1da177e4 LT |
2884 | } |
2885 | ||
bdc7f021 | 2886 | static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) |
1da177e4 | 2887 | { |
1da177e4 | 2888 | data->timestamp = jiffies; |
bdc7f021 | 2889 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; |
1da177e4 LT |
2890 | } |
2891 | ||
788e7a89 | 2892 | static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2893 | { |
1da177e4 LT |
2894 | struct inode *inode = data->inode; |
2895 | ||
def6ed7e AA |
2896 | /* slot is freed in nfs_writeback_done */ |
2897 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, | |
2898 | task->tk_status); | |
2899 | ||
9e33bed5 | 2900 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { |
1da177e4 | 2901 | rpc_restart_call(task); |
788e7a89 | 2902 | return -EAGAIN; |
1da177e4 | 2903 | } |
4f9838c7 | 2904 | if (task->tk_status >= 0) { |
1da177e4 | 2905 | renew_lease(NFS_SERVER(inode), data->timestamp); |
70ca8852 | 2906 | nfs_post_op_update_inode_force_wcc(inode, data->res.fattr); |
4f9838c7 | 2907 | } |
788e7a89 | 2908 | return 0; |
1da177e4 LT |
2909 | } |
2910 | ||
bdc7f021 | 2911 | static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2912 | { |
bdc7f021 TM |
2913 | struct nfs_server *server = NFS_SERVER(data->inode); |
2914 | ||
a65318bf | 2915 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2916 | data->res.server = server; |
1da177e4 LT |
2917 | data->timestamp = jiffies; |
2918 | ||
bdc7f021 | 2919 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; |
1da177e4 LT |
2920 | } |
2921 | ||
788e7a89 | 2922 | static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data) |
1da177e4 | 2923 | { |
1da177e4 LT |
2924 | struct inode *inode = data->inode; |
2925 | ||
21d9a851 AA |
2926 | nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res, |
2927 | task->tk_status); | |
9e33bed5 | 2928 | if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { |
1da177e4 | 2929 | rpc_restart_call(task); |
788e7a89 | 2930 | return -EAGAIN; |
1da177e4 | 2931 | } |
21d9a851 AA |
2932 | nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client, |
2933 | &data->res.seq_res); | |
9e08a3c5 | 2934 | nfs_refresh_inode(inode, data->res.fattr); |
788e7a89 | 2935 | return 0; |
1da177e4 LT |
2936 | } |
2937 | ||
bdc7f021 | 2938 | static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg) |
1da177e4 | 2939 | { |
788e7a89 | 2940 | struct nfs_server *server = NFS_SERVER(data->inode); |
1da177e4 | 2941 | |
a65318bf | 2942 | data->args.bitmask = server->cache_consistency_bitmask; |
4f9838c7 | 2943 | data->res.server = server; |
bdc7f021 | 2944 | msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; |
1da177e4 LT |
2945 | } |
2946 | ||
2947 | /* | |
2948 | * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special | |
2949 | * standalone procedure for queueing an asynchronous RENEW. | |
2950 | */ | |
963d8fe5 | 2951 | static void nfs4_renew_done(struct rpc_task *task, void *data) |
1da177e4 | 2952 | { |
adfa6f98 | 2953 | struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp; |
963d8fe5 | 2954 | unsigned long timestamp = (unsigned long)data; |
1da177e4 LT |
2955 | |
2956 | if (task->tk_status < 0) { | |
95baa25c TM |
2957 | /* Unless we're shutting down, schedule state recovery! */ |
2958 | if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0) | |
2959 | nfs4_schedule_state_recovery(clp); | |
1da177e4 LT |
2960 | return; |
2961 | } | |
2962 | spin_lock(&clp->cl_lock); | |
2963 | if (time_before(clp->cl_last_renewal,timestamp)) | |
2964 | clp->cl_last_renewal = timestamp; | |
2965 | spin_unlock(&clp->cl_lock); | |
2966 | } | |
2967 | ||
963d8fe5 TM |
2968 | static const struct rpc_call_ops nfs4_renew_ops = { |
2969 | .rpc_call_done = nfs4_renew_done, | |
2970 | }; | |
2971 | ||
adfa6f98 | 2972 | int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2973 | { |
2974 | struct rpc_message msg = { | |
2975 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2976 | .rpc_argp = clp, | |
b4454fe1 | 2977 | .rpc_cred = cred, |
1da177e4 LT |
2978 | }; |
2979 | ||
2980 | return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, | |
963d8fe5 | 2981 | &nfs4_renew_ops, (void *)jiffies); |
1da177e4 LT |
2982 | } |
2983 | ||
adfa6f98 | 2984 | int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
2985 | { |
2986 | struct rpc_message msg = { | |
2987 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], | |
2988 | .rpc_argp = clp, | |
b4454fe1 | 2989 | .rpc_cred = cred, |
1da177e4 LT |
2990 | }; |
2991 | unsigned long now = jiffies; | |
2992 | int status; | |
2993 | ||
2994 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
2995 | if (status < 0) | |
2996 | return status; | |
2997 | spin_lock(&clp->cl_lock); | |
2998 | if (time_before(clp->cl_last_renewal,now)) | |
2999 | clp->cl_last_renewal = now; | |
3000 | spin_unlock(&clp->cl_lock); | |
3001 | return 0; | |
3002 | } | |
3003 | ||
aa1870af BF |
3004 | static inline int nfs4_server_supports_acls(struct nfs_server *server) |
3005 | { | |
3006 | return (server->caps & NFS_CAP_ACLS) | |
3007 | && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) | |
3008 | && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); | |
3009 | } | |
3010 | ||
3011 | /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that | |
3012 | * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on | |
3013 | * the stack. | |
3014 | */ | |
3015 | #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT) | |
3016 | ||
3017 | static void buf_to_pages(const void *buf, size_t buflen, | |
3018 | struct page **pages, unsigned int *pgbase) | |
3019 | { | |
3020 | const void *p = buf; | |
3021 | ||
3022 | *pgbase = offset_in_page(buf); | |
3023 | p -= *pgbase; | |
3024 | while (p < buf + buflen) { | |
3025 | *(pages++) = virt_to_page(p); | |
3026 | p += PAGE_CACHE_SIZE; | |
3027 | } | |
3028 | } | |
3029 | ||
e50a1c2e BF |
3030 | struct nfs4_cached_acl { |
3031 | int cached; | |
3032 | size_t len; | |
3e9d4154 | 3033 | char data[0]; |
e50a1c2e BF |
3034 | }; |
3035 | ||
3036 | static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) | |
3037 | { | |
3038 | struct nfs_inode *nfsi = NFS_I(inode); | |
3039 | ||
3040 | spin_lock(&inode->i_lock); | |
3041 | kfree(nfsi->nfs4_acl); | |
3042 | nfsi->nfs4_acl = acl; | |
3043 | spin_unlock(&inode->i_lock); | |
3044 | } | |
3045 | ||
3046 | static void nfs4_zap_acl_attr(struct inode *inode) | |
3047 | { | |
3048 | nfs4_set_cached_acl(inode, NULL); | |
3049 | } | |
3050 | ||
3051 | static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) | |
3052 | { | |
3053 | struct nfs_inode *nfsi = NFS_I(inode); | |
3054 | struct nfs4_cached_acl *acl; | |
3055 | int ret = -ENOENT; | |
3056 | ||
3057 | spin_lock(&inode->i_lock); | |
3058 | acl = nfsi->nfs4_acl; | |
3059 | if (acl == NULL) | |
3060 | goto out; | |
3061 | if (buf == NULL) /* user is just asking for length */ | |
3062 | goto out_len; | |
3063 | if (acl->cached == 0) | |
3064 | goto out; | |
3065 | ret = -ERANGE; /* see getxattr(2) man page */ | |
3066 | if (acl->len > buflen) | |
3067 | goto out; | |
3068 | memcpy(buf, acl->data, acl->len); | |
3069 | out_len: | |
3070 | ret = acl->len; | |
3071 | out: | |
3072 | spin_unlock(&inode->i_lock); | |
3073 | return ret; | |
3074 | } | |
3075 | ||
3076 | static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len) | |
3077 | { | |
3078 | struct nfs4_cached_acl *acl; | |
3079 | ||
3080 | if (buf && acl_len <= PAGE_SIZE) { | |
3081 | acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL); | |
3082 | if (acl == NULL) | |
3083 | goto out; | |
3084 | acl->cached = 1; | |
3085 | memcpy(acl->data, buf, acl_len); | |
3086 | } else { | |
3087 | acl = kmalloc(sizeof(*acl), GFP_KERNEL); | |
3088 | if (acl == NULL) | |
3089 | goto out; | |
3090 | acl->cached = 0; | |
3091 | } | |
3092 | acl->len = acl_len; | |
3093 | out: | |
3094 | nfs4_set_cached_acl(inode, acl); | |
3095 | } | |
3096 | ||
16b4289c | 3097 | static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
aa1870af | 3098 | { |
aa1870af BF |
3099 | struct page *pages[NFS4ACL_MAXPAGES]; |
3100 | struct nfs_getaclargs args = { | |
3101 | .fh = NFS_FH(inode), | |
3102 | .acl_pages = pages, | |
3103 | .acl_len = buflen, | |
3104 | }; | |
663c79b3 BH |
3105 | struct nfs_getaclres res = { |
3106 | .acl_len = buflen, | |
3107 | }; | |
e50a1c2e | 3108 | void *resp_buf; |
aa1870af BF |
3109 | struct rpc_message msg = { |
3110 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], | |
3111 | .rpc_argp = &args, | |
663c79b3 | 3112 | .rpc_resp = &res, |
aa1870af | 3113 | }; |
e50a1c2e | 3114 | struct page *localpage = NULL; |
aa1870af BF |
3115 | int ret; |
3116 | ||
e50a1c2e BF |
3117 | if (buflen < PAGE_SIZE) { |
3118 | /* As long as we're doing a round trip to the server anyway, | |
3119 | * let's be prepared for a page of acl data. */ | |
3120 | localpage = alloc_page(GFP_KERNEL); | |
3121 | resp_buf = page_address(localpage); | |
3122 | if (localpage == NULL) | |
3123 | return -ENOMEM; | |
3124 | args.acl_pages[0] = localpage; | |
3125 | args.acl_pgbase = 0; | |
663c79b3 | 3126 | args.acl_len = PAGE_SIZE; |
e50a1c2e BF |
3127 | } else { |
3128 | resp_buf = buf; | |
3129 | buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase); | |
3130 | } | |
cccef3b9 | 3131 | ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0); |
e50a1c2e BF |
3132 | if (ret) |
3133 | goto out_free; | |
663c79b3 BH |
3134 | if (res.acl_len > args.acl_len) |
3135 | nfs4_write_cached_acl(inode, NULL, res.acl_len); | |
e50a1c2e | 3136 | else |
663c79b3 | 3137 | nfs4_write_cached_acl(inode, resp_buf, res.acl_len); |
e50a1c2e BF |
3138 | if (buf) { |
3139 | ret = -ERANGE; | |
663c79b3 | 3140 | if (res.acl_len > buflen) |
e50a1c2e BF |
3141 | goto out_free; |
3142 | if (localpage) | |
663c79b3 | 3143 | memcpy(buf, resp_buf, res.acl_len); |
e50a1c2e | 3144 | } |
663c79b3 | 3145 | ret = res.acl_len; |
e50a1c2e BF |
3146 | out_free: |
3147 | if (localpage) | |
3148 | __free_page(localpage); | |
aa1870af BF |
3149 | return ret; |
3150 | } | |
3151 | ||
16b4289c TM |
3152 | static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) |
3153 | { | |
3154 | struct nfs4_exception exception = { }; | |
3155 | ssize_t ret; | |
3156 | do { | |
3157 | ret = __nfs4_get_acl_uncached(inode, buf, buflen); | |
3158 | if (ret >= 0) | |
3159 | break; | |
3160 | ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); | |
3161 | } while (exception.retry); | |
3162 | return ret; | |
3163 | } | |
3164 | ||
e50a1c2e BF |
3165 | static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) |
3166 | { | |
3167 | struct nfs_server *server = NFS_SERVER(inode); | |
3168 | int ret; | |
3169 | ||
3170 | if (!nfs4_server_supports_acls(server)) | |
3171 | return -EOPNOTSUPP; | |
3172 | ret = nfs_revalidate_inode(server, inode); | |
3173 | if (ret < 0) | |
3174 | return ret; | |
f41f7418 TM |
3175 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) |
3176 | nfs_zap_acl_cache(inode); | |
e50a1c2e BF |
3177 | ret = nfs4_read_cached_acl(inode, buf, buflen); |
3178 | if (ret != -ENOENT) | |
3179 | return ret; | |
3180 | return nfs4_get_acl_uncached(inode, buf, buflen); | |
3181 | } | |
3182 | ||
16b4289c | 3183 | static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
4b580ee3 BF |
3184 | { |
3185 | struct nfs_server *server = NFS_SERVER(inode); | |
3186 | struct page *pages[NFS4ACL_MAXPAGES]; | |
3187 | struct nfs_setaclargs arg = { | |
3188 | .fh = NFS_FH(inode), | |
3189 | .acl_pages = pages, | |
3190 | .acl_len = buflen, | |
3191 | }; | |
73c403a9 | 3192 | struct nfs_setaclres res; |
4b580ee3 BF |
3193 | struct rpc_message msg = { |
3194 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], | |
3195 | .rpc_argp = &arg, | |
73c403a9 | 3196 | .rpc_resp = &res, |
4b580ee3 BF |
3197 | }; |
3198 | int ret; | |
3199 | ||
3200 | if (!nfs4_server_supports_acls(server)) | |
3201 | return -EOPNOTSUPP; | |
642ac549 | 3202 | nfs_inode_return_delegation(inode); |
4b580ee3 | 3203 | buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase); |
cccef3b9 | 3204 | ret = nfs4_call_sync(server, &msg, &arg, &res, 1); |
f41f7418 TM |
3205 | nfs_access_zap_cache(inode); |
3206 | nfs_zap_acl_cache(inode); | |
4b580ee3 BF |
3207 | return ret; |
3208 | } | |
3209 | ||
16b4289c TM |
3210 | static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) |
3211 | { | |
3212 | struct nfs4_exception exception = { }; | |
3213 | int err; | |
3214 | do { | |
3215 | err = nfs4_handle_exception(NFS_SERVER(inode), | |
3216 | __nfs4_proc_set_acl(inode, buf, buflen), | |
3217 | &exception); | |
3218 | } while (exception.retry); | |
3219 | return err; | |
3220 | } | |
3221 | ||
1da177e4 | 3222 | static int |
9e33bed5 | 3223 | nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) |
1da177e4 | 3224 | { |
7539bbab | 3225 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
3226 | |
3227 | if (!clp || task->tk_status >= 0) | |
3228 | return 0; | |
3229 | switch(task->tk_status) { | |
9e33bed5 TM |
3230 | case -NFS4ERR_ADMIN_REVOKED: |
3231 | case -NFS4ERR_BAD_STATEID: | |
3232 | case -NFS4ERR_OPENMODE: | |
3233 | if (state == NULL) | |
3234 | break; | |
3235 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1da177e4 LT |
3236 | case -NFS4ERR_STALE_CLIENTID: |
3237 | case -NFS4ERR_STALE_STATEID: | |
3238 | case -NFS4ERR_EXPIRED: | |
5d00837b | 3239 | rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); |
1da177e4 | 3240 | nfs4_schedule_state_recovery(clp); |
e005e804 | 3241 | if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) |
fda13939 | 3242 | rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); |
1da177e4 LT |
3243 | task->tk_status = 0; |
3244 | return -EAGAIN; | |
1da177e4 | 3245 | case -NFS4ERR_DELAY: |
2e96d286 | 3246 | nfs_inc_server_stats(server, NFSIOS_DELAY); |
006ea73e | 3247 | case -NFS4ERR_GRACE: |
1da177e4 LT |
3248 | rpc_delay(task, NFS4_POLL_RETRY_MAX); |
3249 | task->tk_status = 0; | |
3250 | return -EAGAIN; | |
3251 | case -NFS4ERR_OLD_STATEID: | |
3252 | task->tk_status = 0; | |
3253 | return -EAGAIN; | |
3254 | } | |
3255 | task->tk_status = nfs4_map_errors(task->tk_status); | |
3256 | return 0; | |
3257 | } | |
3258 | ||
adfa6f98 | 3259 | int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred) |
1da177e4 LT |
3260 | { |
3261 | nfs4_verifier sc_verifier; | |
3262 | struct nfs4_setclientid setclientid = { | |
3263 | .sc_verifier = &sc_verifier, | |
3264 | .sc_prog = program, | |
3265 | }; | |
3266 | struct rpc_message msg = { | |
3267 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], | |
3268 | .rpc_argp = &setclientid, | |
3269 | .rpc_resp = clp, | |
286d7d6a | 3270 | .rpc_cred = cred, |
1da177e4 | 3271 | }; |
bc4785cd | 3272 | __be32 *p; |
1da177e4 LT |
3273 | int loop = 0; |
3274 | int status; | |
3275 | ||
bc4785cd | 3276 | p = (__be32*)sc_verifier.data; |
1da177e4 LT |
3277 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); |
3278 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
3279 | ||
3280 | for(;;) { | |
3281 | setclientid.sc_name_len = scnprintf(setclientid.sc_name, | |
69dd716c | 3282 | sizeof(setclientid.sc_name), "%s/%s %s %s %u", |
d4d3c507 CL |
3283 | clp->cl_ipaddr, |
3284 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3285 | RPC_DISPLAY_ADDR), | |
69dd716c TM |
3286 | rpc_peeraddr2str(clp->cl_rpcclient, |
3287 | RPC_DISPLAY_PROTO), | |
78ea323b | 3288 | clp->cl_rpcclient->cl_auth->au_ops->au_name, |
1da177e4 LT |
3289 | clp->cl_id_uniquifier); |
3290 | setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, | |
d4d3c507 CL |
3291 | sizeof(setclientid.sc_netid), |
3292 | rpc_peeraddr2str(clp->cl_rpcclient, | |
3293 | RPC_DISPLAY_NETID)); | |
1da177e4 | 3294 | setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, |
d4d3c507 | 3295 | sizeof(setclientid.sc_uaddr), "%s.%u.%u", |
1da177e4 LT |
3296 | clp->cl_ipaddr, port >> 8, port & 255); |
3297 | ||
3298 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3299 | if (status != -NFS4ERR_CLID_INUSE) | |
3300 | break; | |
3301 | if (signalled()) | |
3302 | break; | |
3303 | if (loop++ & 1) | |
3304 | ssleep(clp->cl_lease_time + 1); | |
3305 | else | |
3306 | if (++clp->cl_id_uniquifier == 0) | |
3307 | break; | |
3308 | } | |
3309 | return status; | |
3310 | } | |
3311 | ||
adfa6f98 | 3312 | static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 LT |
3313 | { |
3314 | struct nfs_fsinfo fsinfo; | |
3315 | struct rpc_message msg = { | |
3316 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], | |
3317 | .rpc_argp = clp, | |
3318 | .rpc_resp = &fsinfo, | |
286d7d6a | 3319 | .rpc_cred = cred, |
1da177e4 LT |
3320 | }; |
3321 | unsigned long now; | |
3322 | int status; | |
3323 | ||
3324 | now = jiffies; | |
3325 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
3326 | if (status == 0) { | |
3327 | spin_lock(&clp->cl_lock); | |
3328 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
3329 | clp->cl_last_renewal = now; | |
3330 | spin_unlock(&clp->cl_lock); | |
3331 | } | |
3332 | return status; | |
3333 | } | |
3334 | ||
adfa6f98 | 3335 | int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred) |
51581f3b | 3336 | { |
77e03677 | 3337 | long timeout = 0; |
51581f3b TM |
3338 | int err; |
3339 | do { | |
3340 | err = _nfs4_proc_setclientid_confirm(clp, cred); | |
3341 | switch (err) { | |
3342 | case 0: | |
3343 | return err; | |
3344 | case -NFS4ERR_RESOURCE: | |
3345 | /* The IBM lawyers misread another document! */ | |
3346 | case -NFS4ERR_DELAY: | |
3347 | err = nfs4_delay(clp->cl_rpcclient, &timeout); | |
3348 | } | |
3349 | } while (err == 0); | |
3350 | return err; | |
3351 | } | |
3352 | ||
fe650407 TM |
3353 | struct nfs4_delegreturndata { |
3354 | struct nfs4_delegreturnargs args; | |
fa178f29 | 3355 | struct nfs4_delegreturnres res; |
fe650407 TM |
3356 | struct nfs_fh fh; |
3357 | nfs4_stateid stateid; | |
26e976a8 | 3358 | unsigned long timestamp; |
fa178f29 | 3359 | struct nfs_fattr fattr; |
fe650407 TM |
3360 | int rpc_status; |
3361 | }; | |
3362 | ||
fe650407 TM |
3363 | static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) |
3364 | { | |
3365 | struct nfs4_delegreturndata *data = calldata; | |
938e1010 AA |
3366 | |
3367 | nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res, | |
3368 | task->tk_status); | |
3369 | ||
fe650407 | 3370 | data->rpc_status = task->tk_status; |
26e976a8 | 3371 | if (data->rpc_status == 0) |
fa178f29 | 3372 | renew_lease(data->res.server, data->timestamp); |
fe650407 TM |
3373 | } |
3374 | ||
3375 | static void nfs4_delegreturn_release(void *calldata) | |
3376 | { | |
fe650407 TM |
3377 | kfree(calldata); |
3378 | } | |
3379 | ||
938e1010 AA |
3380 | #if defined(CONFIG_NFS_V4_1) |
3381 | static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) | |
3382 | { | |
3383 | struct nfs4_delegreturndata *d_data; | |
3384 | ||
3385 | d_data = (struct nfs4_delegreturndata *)data; | |
3386 | ||
3387 | if (nfs4_setup_sequence(d_data->res.server->nfs_client, | |
3388 | &d_data->args.seq_args, | |
3389 | &d_data->res.seq_res, 1, task)) | |
3390 | return; | |
3391 | rpc_call_start(task); | |
3392 | } | |
3393 | #endif /* CONFIG_NFS_V4_1 */ | |
3394 | ||
c8d149f3 | 3395 | static const struct rpc_call_ops nfs4_delegreturn_ops = { |
938e1010 AA |
3396 | #if defined(CONFIG_NFS_V4_1) |
3397 | .rpc_call_prepare = nfs4_delegreturn_prepare, | |
3398 | #endif /* CONFIG_NFS_V4_1 */ | |
fe650407 TM |
3399 | .rpc_call_done = nfs4_delegreturn_done, |
3400 | .rpc_release = nfs4_delegreturn_release, | |
3401 | }; | |
3402 | ||
e6f81075 | 3403 | static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
fe650407 TM |
3404 | { |
3405 | struct nfs4_delegreturndata *data; | |
fa178f29 | 3406 | struct nfs_server *server = NFS_SERVER(inode); |
fe650407 | 3407 | struct rpc_task *task; |
5138fde0 TM |
3408 | struct rpc_message msg = { |
3409 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], | |
3410 | .rpc_cred = cred, | |
3411 | }; | |
c970aa85 TM |
3412 | struct rpc_task_setup task_setup_data = { |
3413 | .rpc_client = server->client, | |
5138fde0 | 3414 | .rpc_message = &msg, |
c970aa85 TM |
3415 | .callback_ops = &nfs4_delegreturn_ops, |
3416 | .flags = RPC_TASK_ASYNC, | |
3417 | }; | |
e6f81075 | 3418 | int status = 0; |
fe650407 | 3419 | |
938e1010 | 3420 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
fe650407 TM |
3421 | if (data == NULL) |
3422 | return -ENOMEM; | |
3423 | data->args.fhandle = &data->fh; | |
3424 | data->args.stateid = &data->stateid; | |
fa178f29 | 3425 | data->args.bitmask = server->attr_bitmask; |
fe650407 TM |
3426 | nfs_copy_fh(&data->fh, NFS_FH(inode)); |
3427 | memcpy(&data->stateid, stateid, sizeof(data->stateid)); | |
fa178f29 TM |
3428 | data->res.fattr = &data->fattr; |
3429 | data->res.server = server; | |
5f7dbd5c | 3430 | data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
5138fde0 | 3431 | nfs_fattr_init(data->res.fattr); |
26e976a8 | 3432 | data->timestamp = jiffies; |
fe650407 TM |
3433 | data->rpc_status = 0; |
3434 | ||
c970aa85 | 3435 | task_setup_data.callback_data = data; |
5138fde0 TM |
3436 | msg.rpc_argp = &data->args, |
3437 | msg.rpc_resp = &data->res, | |
c970aa85 | 3438 | task = rpc_run_task(&task_setup_data); |
7a1218a2 | 3439 | if (IS_ERR(task)) |
fe650407 | 3440 | return PTR_ERR(task); |
e6f81075 TM |
3441 | if (!issync) |
3442 | goto out; | |
fe650407 | 3443 | status = nfs4_wait_for_completion_rpc_task(task); |
e6f81075 TM |
3444 | if (status != 0) |
3445 | goto out; | |
3446 | status = data->rpc_status; | |
3447 | if (status != 0) | |
3448 | goto out; | |
3449 | nfs_refresh_inode(inode, &data->fattr); | |
3450 | out: | |
e6b3c4db | 3451 | rpc_put_task(task); |
fe650407 | 3452 | return status; |
1da177e4 LT |
3453 | } |
3454 | ||
e6f81075 | 3455 | int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) |
1da177e4 LT |
3456 | { |
3457 | struct nfs_server *server = NFS_SERVER(inode); | |
3458 | struct nfs4_exception exception = { }; | |
3459 | int err; | |
3460 | do { | |
e6f81075 | 3461 | err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); |
1da177e4 LT |
3462 | switch (err) { |
3463 | case -NFS4ERR_STALE_STATEID: | |
3464 | case -NFS4ERR_EXPIRED: | |
1da177e4 LT |
3465 | case 0: |
3466 | return 0; | |
3467 | } | |
3468 | err = nfs4_handle_exception(server, err, &exception); | |
3469 | } while (exception.retry); | |
3470 | return err; | |
3471 | } | |
3472 | ||
3473 | #define NFS4_LOCK_MINTIMEOUT (1 * HZ) | |
3474 | #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) | |
3475 | ||
3476 | /* | |
3477 | * sleep, with exponential backoff, and retry the LOCK operation. | |
3478 | */ | |
3479 | static unsigned long | |
3480 | nfs4_set_lock_task_retry(unsigned long timeout) | |
3481 | { | |
150030b7 | 3482 | schedule_timeout_killable(timeout); |
1da177e4 LT |
3483 | timeout <<= 1; |
3484 | if (timeout > NFS4_LOCK_MAXTIMEOUT) | |
3485 | return NFS4_LOCK_MAXTIMEOUT; | |
3486 | return timeout; | |
3487 | } | |
3488 | ||
1da177e4 LT |
3489 | static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) |
3490 | { | |
3491 | struct inode *inode = state->inode; | |
3492 | struct nfs_server *server = NFS_SERVER(inode); | |
7539bbab | 3493 | struct nfs_client *clp = server->nfs_client; |
911d1aaf | 3494 | struct nfs_lockt_args arg = { |
1da177e4 | 3495 | .fh = NFS_FH(inode), |
911d1aaf | 3496 | .fl = request, |
1da177e4 | 3497 | }; |
911d1aaf TM |
3498 | struct nfs_lockt_res res = { |
3499 | .denied = request, | |
1da177e4 LT |
3500 | }; |
3501 | struct rpc_message msg = { | |
3502 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], | |
3503 | .rpc_argp = &arg, | |
3504 | .rpc_resp = &res, | |
3505 | .rpc_cred = state->owner->so_cred, | |
3506 | }; | |
1da177e4 LT |
3507 | struct nfs4_lock_state *lsp; |
3508 | int status; | |
3509 | ||
911d1aaf | 3510 | arg.lock_owner.clientid = clp->cl_clientid; |
8d0a8a9d TM |
3511 | status = nfs4_set_lock_state(state, request); |
3512 | if (status != 0) | |
3513 | goto out; | |
3514 | lsp = request->fl_u.nfs4_fl.owner; | |
9f958ab8 | 3515 | arg.lock_owner.id = lsp->ls_id.id; |
cccef3b9 | 3516 | status = nfs4_call_sync(server, &msg, &arg, &res, 1); |
911d1aaf TM |
3517 | switch (status) { |
3518 | case 0: | |
3519 | request->fl_type = F_UNLCK; | |
3520 | break; | |
3521 | case -NFS4ERR_DENIED: | |
3522 | status = 0; | |
1da177e4 | 3523 | } |
70cc6487 | 3524 | request->fl_ops->fl_release_private(request); |
8d0a8a9d | 3525 | out: |
1da177e4 LT |
3526 | return status; |
3527 | } | |
3528 | ||
3529 | static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3530 | { | |
3531 | struct nfs4_exception exception = { }; | |
3532 | int err; | |
3533 | ||
3534 | do { | |
3535 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3536 | _nfs4_proc_getlk(state, cmd, request), | |
3537 | &exception); | |
3538 | } while (exception.retry); | |
3539 | return err; | |
3540 | } | |
3541 | ||
3542 | static int do_vfs_lock(struct file *file, struct file_lock *fl) | |
3543 | { | |
3544 | int res = 0; | |
3545 | switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { | |
3546 | case FL_POSIX: | |
3547 | res = posix_lock_file_wait(file, fl); | |
3548 | break; | |
3549 | case FL_FLOCK: | |
3550 | res = flock_lock_file_wait(file, fl); | |
3551 | break; | |
3552 | default: | |
3553 | BUG(); | |
3554 | } | |
1da177e4 LT |
3555 | return res; |
3556 | } | |
3557 | ||
faf5f49c | 3558 | struct nfs4_unlockdata { |
911d1aaf TM |
3559 | struct nfs_locku_args arg; |
3560 | struct nfs_locku_res res; | |
faf5f49c TM |
3561 | struct nfs4_lock_state *lsp; |
3562 | struct nfs_open_context *ctx; | |
911d1aaf TM |
3563 | struct file_lock fl; |
3564 | const struct nfs_server *server; | |
26e976a8 | 3565 | unsigned long timestamp; |
faf5f49c TM |
3566 | }; |
3567 | ||
911d1aaf TM |
3568 | static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, |
3569 | struct nfs_open_context *ctx, | |
3570 | struct nfs4_lock_state *lsp, | |
3571 | struct nfs_seqid *seqid) | |
3572 | { | |
3573 | struct nfs4_unlockdata *p; | |
3574 | struct inode *inode = lsp->ls_state->inode; | |
3575 | ||
a893693c | 3576 | p = kzalloc(sizeof(*p), GFP_KERNEL); |
911d1aaf TM |
3577 | if (p == NULL) |
3578 | return NULL; | |
3579 | p->arg.fh = NFS_FH(inode); | |
3580 | p->arg.fl = &p->fl; | |
3581 | p->arg.seqid = seqid; | |
c1d51931 | 3582 | p->res.seqid = seqid; |
5f7dbd5c | 3583 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
911d1aaf TM |
3584 | p->arg.stateid = &lsp->ls_stateid; |
3585 | p->lsp = lsp; | |
3586 | atomic_inc(&lsp->ls_count); | |
3587 | /* Ensure we don't close file until we're done freeing locks! */ | |
3588 | p->ctx = get_nfs_open_context(ctx); | |
3589 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3590 | p->server = NFS_SERVER(inode); | |
3591 | return p; | |
3592 | } | |
3593 | ||
06f814a3 | 3594 | static void nfs4_locku_release_calldata(void *data) |
faf5f49c | 3595 | { |
963d8fe5 | 3596 | struct nfs4_unlockdata *calldata = data; |
911d1aaf | 3597 | nfs_free_seqid(calldata->arg.seqid); |
06f814a3 TM |
3598 | nfs4_put_lock_state(calldata->lsp); |
3599 | put_nfs_open_context(calldata->ctx); | |
3600 | kfree(calldata); | |
faf5f49c TM |
3601 | } |
3602 | ||
963d8fe5 | 3603 | static void nfs4_locku_done(struct rpc_task *task, void *data) |
faf5f49c | 3604 | { |
963d8fe5 | 3605 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3606 | |
a893693c AA |
3607 | nfs4_sequence_done(calldata->server, &calldata->res.seq_res, |
3608 | task->tk_status); | |
06f814a3 TM |
3609 | if (RPC_ASSASSINATED(task)) |
3610 | return; | |
faf5f49c TM |
3611 | switch (task->tk_status) { |
3612 | case 0: | |
3613 | memcpy(calldata->lsp->ls_stateid.data, | |
911d1aaf | 3614 | calldata->res.stateid.data, |
faf5f49c | 3615 | sizeof(calldata->lsp->ls_stateid.data)); |
26e976a8 | 3616 | renew_lease(calldata->server, calldata->timestamp); |
faf5f49c | 3617 | break; |
9e33bed5 TM |
3618 | case -NFS4ERR_BAD_STATEID: |
3619 | case -NFS4ERR_OLD_STATEID: | |
faf5f49c TM |
3620 | case -NFS4ERR_STALE_STATEID: |
3621 | case -NFS4ERR_EXPIRED: | |
faf5f49c TM |
3622 | break; |
3623 | default: | |
9e33bed5 | 3624 | if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) |
faf5f49c | 3625 | rpc_restart_call(task); |
faf5f49c | 3626 | } |
a893693c AA |
3627 | nfs4_sequence_free_slot(calldata->server->nfs_client, |
3628 | &calldata->res.seq_res); | |
faf5f49c TM |
3629 | } |
3630 | ||
4ce70ada | 3631 | static void nfs4_locku_prepare(struct rpc_task *task, void *data) |
faf5f49c | 3632 | { |
4ce70ada | 3633 | struct nfs4_unlockdata *calldata = data; |
faf5f49c | 3634 | |
911d1aaf | 3635 | if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) |
faf5f49c TM |
3636 | return; |
3637 | if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) { | |
963d8fe5 TM |
3638 | /* Note: exit _without_ running nfs4_locku_done */ |
3639 | task->tk_action = NULL; | |
faf5f49c TM |
3640 | return; |
3641 | } | |
26e976a8 | 3642 | calldata->timestamp = jiffies; |
a893693c AA |
3643 | if (nfs4_setup_sequence(calldata->server->nfs_client, |
3644 | &calldata->arg.seq_args, | |
3645 | &calldata->res.seq_res, 1, task)) | |
3646 | return; | |
5138fde0 | 3647 | rpc_call_start(task); |
faf5f49c TM |
3648 | } |
3649 | ||
963d8fe5 | 3650 | static const struct rpc_call_ops nfs4_locku_ops = { |
4ce70ada | 3651 | .rpc_call_prepare = nfs4_locku_prepare, |
963d8fe5 | 3652 | .rpc_call_done = nfs4_locku_done, |
06f814a3 | 3653 | .rpc_release = nfs4_locku_release_calldata, |
963d8fe5 TM |
3654 | }; |
3655 | ||
a5d16a4d TM |
3656 | static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, |
3657 | struct nfs_open_context *ctx, | |
3658 | struct nfs4_lock_state *lsp, | |
3659 | struct nfs_seqid *seqid) | |
3660 | { | |
3661 | struct nfs4_unlockdata *data; | |
5138fde0 TM |
3662 | struct rpc_message msg = { |
3663 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], | |
3664 | .rpc_cred = ctx->cred, | |
3665 | }; | |
c970aa85 TM |
3666 | struct rpc_task_setup task_setup_data = { |
3667 | .rpc_client = NFS_CLIENT(lsp->ls_state->inode), | |
5138fde0 | 3668 | .rpc_message = &msg, |
c970aa85 | 3669 | .callback_ops = &nfs4_locku_ops, |
101070ca | 3670 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3671 | .flags = RPC_TASK_ASYNC, |
3672 | }; | |
a5d16a4d | 3673 | |
137d6aca FF |
3674 | /* Ensure this is an unlock - when canceling a lock, the |
3675 | * canceled lock is passed in, and it won't be an unlock. | |
3676 | */ | |
3677 | fl->fl_type = F_UNLCK; | |
3678 | ||
a5d16a4d TM |
3679 | data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); |
3680 | if (data == NULL) { | |
3681 | nfs_free_seqid(seqid); | |
3682 | return ERR_PTR(-ENOMEM); | |
3683 | } | |
3684 | ||
5138fde0 TM |
3685 | msg.rpc_argp = &data->arg, |
3686 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3687 | task_setup_data.callback_data = data; |
3688 | return rpc_run_task(&task_setup_data); | |
a5d16a4d TM |
3689 | } |
3690 | ||
faf5f49c TM |
3691 | static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) |
3692 | { | |
19e03c57 | 3693 | struct nfs_inode *nfsi = NFS_I(state->inode); |
911d1aaf | 3694 | struct nfs_seqid *seqid; |
1da177e4 | 3695 | struct nfs4_lock_state *lsp; |
06f814a3 TM |
3696 | struct rpc_task *task; |
3697 | int status = 0; | |
536ff0f8 | 3698 | unsigned char fl_flags = request->fl_flags; |
faf5f49c | 3699 | |
8d0a8a9d | 3700 | status = nfs4_set_lock_state(state, request); |
9b073574 TM |
3701 | /* Unlock _before_ we do the RPC call */ |
3702 | request->fl_flags |= FL_EXISTS; | |
19e03c57 TM |
3703 | down_read(&nfsi->rwsem); |
3704 | if (do_vfs_lock(request->fl_file, request) == -ENOENT) { | |
3705 | up_read(&nfsi->rwsem); | |
9b073574 | 3706 | goto out; |
19e03c57 TM |
3707 | } |
3708 | up_read(&nfsi->rwsem); | |
8d0a8a9d | 3709 | if (status != 0) |
9b073574 TM |
3710 | goto out; |
3711 | /* Is this a delegated lock? */ | |
3712 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
3713 | goto out; | |
8d0a8a9d | 3714 | lsp = request->fl_u.nfs4_fl.owner; |
911d1aaf | 3715 | seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
9b073574 | 3716 | status = -ENOMEM; |
911d1aaf | 3717 | if (seqid == NULL) |
9b073574 | 3718 | goto out; |
cd3758e3 | 3719 | task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); |
a5d16a4d TM |
3720 | status = PTR_ERR(task); |
3721 | if (IS_ERR(task)) | |
9b073574 | 3722 | goto out; |
a5d16a4d | 3723 | status = nfs4_wait_for_completion_rpc_task(task); |
e6b3c4db | 3724 | rpc_put_task(task); |
9b073574 | 3725 | out: |
536ff0f8 | 3726 | request->fl_flags = fl_flags; |
1da177e4 LT |
3727 | return status; |
3728 | } | |
3729 | ||
a5d16a4d TM |
3730 | struct nfs4_lockdata { |
3731 | struct nfs_lock_args arg; | |
3732 | struct nfs_lock_res res; | |
3733 | struct nfs4_lock_state *lsp; | |
3734 | struct nfs_open_context *ctx; | |
3735 | struct file_lock fl; | |
26e976a8 | 3736 | unsigned long timestamp; |
a5d16a4d TM |
3737 | int rpc_status; |
3738 | int cancelled; | |
66179efe | 3739 | struct nfs_server *server; |
a5d16a4d TM |
3740 | }; |
3741 | ||
3742 | static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, | |
3743 | struct nfs_open_context *ctx, struct nfs4_lock_state *lsp) | |
1da177e4 | 3744 | { |
a5d16a4d TM |
3745 | struct nfs4_lockdata *p; |
3746 | struct inode *inode = lsp->ls_state->inode; | |
1da177e4 | 3747 | struct nfs_server *server = NFS_SERVER(inode); |
a5d16a4d TM |
3748 | |
3749 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
3750 | if (p == NULL) | |
3751 | return NULL; | |
3752 | ||
3753 | p->arg.fh = NFS_FH(inode); | |
3754 | p->arg.fl = &p->fl; | |
2f74c0a0 TM |
3755 | p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid); |
3756 | if (p->arg.open_seqid == NULL) | |
3757 | goto out_free; | |
a5d16a4d TM |
3758 | p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid); |
3759 | if (p->arg.lock_seqid == NULL) | |
2f74c0a0 | 3760 | goto out_free_seqid; |
a5d16a4d | 3761 | p->arg.lock_stateid = &lsp->ls_stateid; |
7539bbab | 3762 | p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; |
9f958ab8 | 3763 | p->arg.lock_owner.id = lsp->ls_id.id; |
c1d51931 | 3764 | p->res.lock_seqid = p->arg.lock_seqid; |
5f7dbd5c | 3765 | p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; |
a5d16a4d | 3766 | p->lsp = lsp; |
66179efe | 3767 | p->server = server; |
a5d16a4d TM |
3768 | atomic_inc(&lsp->ls_count); |
3769 | p->ctx = get_nfs_open_context(ctx); | |
3770 | memcpy(&p->fl, fl, sizeof(p->fl)); | |
3771 | return p; | |
2f74c0a0 TM |
3772 | out_free_seqid: |
3773 | nfs_free_seqid(p->arg.open_seqid); | |
a5d16a4d TM |
3774 | out_free: |
3775 | kfree(p); | |
3776 | return NULL; | |
3777 | } | |
3778 | ||
3779 | static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) | |
3780 | { | |
3781 | struct nfs4_lockdata *data = calldata; | |
3782 | struct nfs4_state *state = data->lsp->ls_state; | |
06735b34 | 3783 | |
3110ff80 | 3784 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 TM |
3785 | if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) |
3786 | return; | |
a5d16a4d TM |
3787 | /* Do we need to do an open_to_lock_owner? */ |
3788 | if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { | |
e6e21970 TM |
3789 | if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) |
3790 | return; | |
a5d16a4d TM |
3791 | data->arg.open_stateid = &state->stateid; |
3792 | data->arg.new_lock_owner = 1; | |
c1d51931 | 3793 | data->res.open_seqid = data->arg.open_seqid; |
2f74c0a0 TM |
3794 | } else |
3795 | data->arg.new_lock_owner = 0; | |
26e976a8 | 3796 | data->timestamp = jiffies; |
66179efe AA |
3797 | if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args, |
3798 | &data->res.seq_res, 1, task)) | |
3799 | return; | |
5138fde0 | 3800 | rpc_call_start(task); |
3110ff80 | 3801 | dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); |
a5d16a4d TM |
3802 | } |
3803 | ||
3804 | static void nfs4_lock_done(struct rpc_task *task, void *calldata) | |
3805 | { | |
3806 | struct nfs4_lockdata *data = calldata; | |
3807 | ||
3110ff80 | 3808 | dprintk("%s: begin!\n", __func__); |
a5d16a4d | 3809 | |
66179efe AA |
3810 | nfs4_sequence_done_free_slot(data->server, &data->res.seq_res, |
3811 | task->tk_status); | |
3812 | ||
a5d16a4d TM |
3813 | data->rpc_status = task->tk_status; |
3814 | if (RPC_ASSASSINATED(task)) | |
3815 | goto out; | |
3816 | if (data->arg.new_lock_owner != 0) { | |
a5d16a4d TM |
3817 | if (data->rpc_status == 0) |
3818 | nfs_confirm_seqid(&data->lsp->ls_seqid, 0); | |
3819 | else | |
3820 | goto out; | |
3821 | } | |
3822 | if (data->rpc_status == 0) { | |
3823 | memcpy(data->lsp->ls_stateid.data, data->res.stateid.data, | |
3824 | sizeof(data->lsp->ls_stateid.data)); | |
3825 | data->lsp->ls_flags |= NFS_LOCK_INITIALIZED; | |
88be9f99 | 3826 | renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp); |
a5d16a4d | 3827 | } |
a5d16a4d | 3828 | out: |
3110ff80 | 3829 | dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); |
a5d16a4d TM |
3830 | } |
3831 | ||
3832 | static void nfs4_lock_release(void *calldata) | |
3833 | { | |
3834 | struct nfs4_lockdata *data = calldata; | |
3835 | ||
3110ff80 | 3836 | dprintk("%s: begin!\n", __func__); |
2f74c0a0 | 3837 | nfs_free_seqid(data->arg.open_seqid); |
a5d16a4d TM |
3838 | if (data->cancelled != 0) { |
3839 | struct rpc_task *task; | |
3840 | task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, | |
3841 | data->arg.lock_seqid); | |
3842 | if (!IS_ERR(task)) | |
e6b3c4db | 3843 | rpc_put_task(task); |
3110ff80 | 3844 | dprintk("%s: cancelling lock!\n", __func__); |
a5d16a4d TM |
3845 | } else |
3846 | nfs_free_seqid(data->arg.lock_seqid); | |
3847 | nfs4_put_lock_state(data->lsp); | |
3848 | put_nfs_open_context(data->ctx); | |
3849 | kfree(data); | |
3110ff80 | 3850 | dprintk("%s: done!\n", __func__); |
a5d16a4d TM |
3851 | } |
3852 | ||
3853 | static const struct rpc_call_ops nfs4_lock_ops = { | |
3854 | .rpc_call_prepare = nfs4_lock_prepare, | |
3855 | .rpc_call_done = nfs4_lock_done, | |
3856 | .rpc_release = nfs4_lock_release, | |
3857 | }; | |
3858 | ||
3859 | static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim) | |
3860 | { | |
3861 | struct nfs4_lockdata *data; | |
3862 | struct rpc_task *task; | |
5138fde0 TM |
3863 | struct rpc_message msg = { |
3864 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], | |
3865 | .rpc_cred = state->owner->so_cred, | |
3866 | }; | |
c970aa85 TM |
3867 | struct rpc_task_setup task_setup_data = { |
3868 | .rpc_client = NFS_CLIENT(state->inode), | |
5138fde0 | 3869 | .rpc_message = &msg, |
c970aa85 | 3870 | .callback_ops = &nfs4_lock_ops, |
101070ca | 3871 | .workqueue = nfsiod_workqueue, |
c970aa85 TM |
3872 | .flags = RPC_TASK_ASYNC, |
3873 | }; | |
a5d16a4d TM |
3874 | int ret; |
3875 | ||
3110ff80 | 3876 | dprintk("%s: begin!\n", __func__); |
cd3758e3 | 3877 | data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), |
a5d16a4d TM |
3878 | fl->fl_u.nfs4_fl.owner); |
3879 | if (data == NULL) | |
3880 | return -ENOMEM; | |
3881 | if (IS_SETLKW(cmd)) | |
3882 | data->arg.block = 1; | |
3883 | if (reclaim != 0) | |
3884 | data->arg.reclaim = 1; | |
5138fde0 TM |
3885 | msg.rpc_argp = &data->arg, |
3886 | msg.rpc_resp = &data->res, | |
c970aa85 TM |
3887 | task_setup_data.callback_data = data; |
3888 | task = rpc_run_task(&task_setup_data); | |
7a1218a2 | 3889 | if (IS_ERR(task)) |
a5d16a4d | 3890 | return PTR_ERR(task); |
a5d16a4d TM |
3891 | ret = nfs4_wait_for_completion_rpc_task(task); |
3892 | if (ret == 0) { | |
3893 | ret = data->rpc_status; | |
3894 | if (ret == -NFS4ERR_DENIED) | |
3895 | ret = -EAGAIN; | |
3896 | } else | |
3897 | data->cancelled = 1; | |
e6b3c4db | 3898 | rpc_put_task(task); |
3110ff80 | 3899 | dprintk("%s: done, ret = %d!\n", __func__, ret); |
a5d16a4d | 3900 | return ret; |
1da177e4 LT |
3901 | } |
3902 | ||
3903 | static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) | |
3904 | { | |
202b50dc TM |
3905 | struct nfs_server *server = NFS_SERVER(state->inode); |
3906 | struct nfs4_exception exception = { }; | |
3907 | int err; | |
3908 | ||
3909 | do { | |
42a2d13e TM |
3910 | /* Cache the lock if possible... */ |
3911 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) | |
3912 | return 0; | |
202b50dc TM |
3913 | err = _nfs4_do_setlk(state, F_SETLK, request, 1); |
3914 | if (err != -NFS4ERR_DELAY) | |
3915 | break; | |
3916 | nfs4_handle_exception(server, err, &exception); | |
3917 | } while (exception.retry); | |
3918 | return err; | |
1da177e4 LT |
3919 | } |
3920 | ||
3921 | static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) | |
3922 | { | |
202b50dc TM |
3923 | struct nfs_server *server = NFS_SERVER(state->inode); |
3924 | struct nfs4_exception exception = { }; | |
3925 | int err; | |
3926 | ||
6bfc93ef TM |
3927 | err = nfs4_set_lock_state(state, request); |
3928 | if (err != 0) | |
3929 | return err; | |
202b50dc | 3930 | do { |
42a2d13e TM |
3931 | if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) |
3932 | return 0; | |
202b50dc TM |
3933 | err = _nfs4_do_setlk(state, F_SETLK, request, 0); |
3934 | if (err != -NFS4ERR_DELAY) | |
3935 | break; | |
3936 | nfs4_handle_exception(server, err, &exception); | |
3937 | } while (exception.retry); | |
3938 | return err; | |
1da177e4 LT |
3939 | } |
3940 | ||
3941 | static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3942 | { | |
19e03c57 | 3943 | struct nfs_inode *nfsi = NFS_I(state->inode); |
01c3b861 | 3944 | unsigned char fl_flags = request->fl_flags; |
1da177e4 LT |
3945 | int status; |
3946 | ||
6bfc93ef | 3947 | /* Is this a delegated open? */ |
6bfc93ef TM |
3948 | status = nfs4_set_lock_state(state, request); |
3949 | if (status != 0) | |
3950 | goto out; | |
01c3b861 TM |
3951 | request->fl_flags |= FL_ACCESS; |
3952 | status = do_vfs_lock(request->fl_file, request); | |
3953 | if (status < 0) | |
3954 | goto out; | |
19e03c57 | 3955 | down_read(&nfsi->rwsem); |
01c3b861 | 3956 | if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
01c3b861 | 3957 | /* Yes: cache locks! */ |
01c3b861 | 3958 | /* ...but avoid races with delegation recall... */ |
19e03c57 TM |
3959 | request->fl_flags = fl_flags & ~FL_SLEEP; |
3960 | status = do_vfs_lock(request->fl_file, request); | |
3961 | goto out_unlock; | |
01c3b861 | 3962 | } |
6bfc93ef TM |
3963 | status = _nfs4_do_setlk(state, cmd, request, 0); |
3964 | if (status != 0) | |
01c3b861 | 3965 | goto out_unlock; |
6bfc93ef | 3966 | /* Note: we always want to sleep here! */ |
01c3b861 | 3967 | request->fl_flags = fl_flags | FL_SLEEP; |
6bfc93ef | 3968 | if (do_vfs_lock(request->fl_file, request) < 0) |
3110ff80 | 3969 | printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__); |
01c3b861 | 3970 | out_unlock: |
19e03c57 | 3971 | up_read(&nfsi->rwsem); |
01c3b861 TM |
3972 | out: |
3973 | request->fl_flags = fl_flags; | |
1da177e4 LT |
3974 | return status; |
3975 | } | |
3976 | ||
3977 | static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) | |
3978 | { | |
3979 | struct nfs4_exception exception = { }; | |
3980 | int err; | |
3981 | ||
3982 | do { | |
3983 | err = nfs4_handle_exception(NFS_SERVER(state->inode), | |
3984 | _nfs4_proc_setlk(state, cmd, request), | |
3985 | &exception); | |
3986 | } while (exception.retry); | |
3987 | return err; | |
3988 | } | |
3989 | ||
3990 | static int | |
3991 | nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) | |
3992 | { | |
3993 | struct nfs_open_context *ctx; | |
3994 | struct nfs4_state *state; | |
3995 | unsigned long timeout = NFS4_LOCK_MINTIMEOUT; | |
3996 | int status; | |
3997 | ||
3998 | /* verify open state */ | |
cd3758e3 | 3999 | ctx = nfs_file_open_context(filp); |
1da177e4 LT |
4000 | state = ctx->state; |
4001 | ||
4002 | if (request->fl_start < 0 || request->fl_end < 0) | |
4003 | return -EINVAL; | |
4004 | ||
4005 | if (IS_GETLK(cmd)) | |
4006 | return nfs4_proc_getlk(state, F_GETLK, request); | |
4007 | ||
4008 | if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) | |
4009 | return -EINVAL; | |
4010 | ||
4011 | if (request->fl_type == F_UNLCK) | |
4012 | return nfs4_proc_unlck(state, cmd, request); | |
4013 | ||
4014 | do { | |
4015 | status = nfs4_proc_setlk(state, cmd, request); | |
4016 | if ((status != -EAGAIN) || IS_SETLK(cmd)) | |
4017 | break; | |
4018 | timeout = nfs4_set_lock_task_retry(timeout); | |
4019 | status = -ERESTARTSYS; | |
4020 | if (signalled()) | |
4021 | break; | |
4022 | } while(status < 0); | |
1da177e4 LT |
4023 | return status; |
4024 | } | |
4025 | ||
888e694c TM |
4026 | int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl) |
4027 | { | |
4028 | struct nfs_server *server = NFS_SERVER(state->inode); | |
4029 | struct nfs4_exception exception = { }; | |
4030 | int err; | |
4031 | ||
4032 | err = nfs4_set_lock_state(state, fl); | |
4033 | if (err != 0) | |
4034 | goto out; | |
4035 | do { | |
4036 | err = _nfs4_do_setlk(state, F_SETLK, fl, 0); | |
4037 | if (err != -NFS4ERR_DELAY) | |
4038 | break; | |
4039 | err = nfs4_handle_exception(server, err, &exception); | |
4040 | } while (exception.retry); | |
4041 | out: | |
4042 | return err; | |
4043 | } | |
6b3b5496 | 4044 | |
aa1870af BF |
4045 | #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" |
4046 | ||
6b3b5496 BF |
4047 | int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf, |
4048 | size_t buflen, int flags) | |
4049 | { | |
4b580ee3 BF |
4050 | struct inode *inode = dentry->d_inode; |
4051 | ||
4052 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4053 | return -EOPNOTSUPP; | |
4054 | ||
4b580ee3 | 4055 | return nfs4_proc_set_acl(inode, buf, buflen); |
6b3b5496 BF |
4056 | } |
4057 | ||
4058 | /* The getxattr man page suggests returning -ENODATA for unknown attributes, | |
4059 | * and that's what we'll do for e.g. user attributes that haven't been set. | |
4060 | * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported | |
4061 | * attributes in kernel-managed attribute namespaces. */ | |
4062 | ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf, | |
4063 | size_t buflen) | |
4064 | { | |
aa1870af BF |
4065 | struct inode *inode = dentry->d_inode; |
4066 | ||
4067 | if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0) | |
4068 | return -EOPNOTSUPP; | |
4069 | ||
4070 | return nfs4_proc_get_acl(inode, buf, buflen); | |
6b3b5496 BF |
4071 | } |
4072 | ||
4073 | ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen) | |
4074 | { | |
aa1870af | 4075 | size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1; |
6b3b5496 | 4076 | |
096455a2 BF |
4077 | if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) |
4078 | return 0; | |
6b3b5496 BF |
4079 | if (buf && buflen < len) |
4080 | return -ERANGE; | |
4081 | if (buf) | |
aa1870af BF |
4082 | memcpy(buf, XATTR_NAME_NFSV4_ACL, len); |
4083 | return len; | |
6b3b5496 BF |
4084 | } |
4085 | ||
69aaaae1 TM |
4086 | static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) |
4087 | { | |
4088 | if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) && | |
4089 | (fattr->valid & NFS_ATTR_FATTR_FSID) && | |
4090 | (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL))) | |
4091 | return; | |
4092 | ||
4093 | fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | | |
4094 | NFS_ATTR_FATTR_NLINK; | |
4095 | fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; | |
4096 | fattr->nlink = 2; | |
4097 | } | |
4098 | ||
56659e99 | 4099 | int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, |
7aaa0b3b | 4100 | struct nfs4_fs_locations *fs_locations, struct page *page) |
683b57b4 TM |
4101 | { |
4102 | struct nfs_server *server = NFS_SERVER(dir); | |
4103 | u32 bitmask[2] = { | |
361e624f MN |
4104 | [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, |
4105 | [1] = FATTR4_WORD1_MOUNTED_ON_FILEID, | |
683b57b4 TM |
4106 | }; |
4107 | struct nfs4_fs_locations_arg args = { | |
4108 | .dir_fh = NFS_FH(dir), | |
c228fd3a | 4109 | .name = name, |
683b57b4 TM |
4110 | .page = page, |
4111 | .bitmask = bitmask, | |
4112 | }; | |
22958463 BH |
4113 | struct nfs4_fs_locations_res res = { |
4114 | .fs_locations = fs_locations, | |
4115 | }; | |
683b57b4 TM |
4116 | struct rpc_message msg = { |
4117 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], | |
4118 | .rpc_argp = &args, | |
22958463 | 4119 | .rpc_resp = &res, |
683b57b4 TM |
4120 | }; |
4121 | int status; | |
4122 | ||
3110ff80 | 4123 | dprintk("%s: start\n", __func__); |
c228fd3a | 4124 | nfs_fattr_init(&fs_locations->fattr); |
683b57b4 | 4125 | fs_locations->server = server; |
830b8e33 | 4126 | fs_locations->nlocations = 0; |
cccef3b9 | 4127 | status = nfs4_call_sync(server, &msg, &args, &res, 0); |
69aaaae1 | 4128 | nfs_fixup_referral_attributes(&fs_locations->fattr); |
3110ff80 | 4129 | dprintk("%s: returned status = %d\n", __func__, status); |
683b57b4 TM |
4130 | return status; |
4131 | } | |
4132 | ||
557134a3 | 4133 | #ifdef CONFIG_NFS_V4_1 |
99fe60d0 BH |
4134 | /* |
4135 | * nfs4_proc_exchange_id() | |
4136 | * | |
4137 | * Since the clientid has expired, all compounds using sessions | |
4138 | * associated with the stale clientid will be returning | |
4139 | * NFS4ERR_BADSESSION in the sequence operation, and will therefore | |
4140 | * be in some phase of session reset. | |
4141 | */ | |
4142 | static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) | |
4143 | { | |
4144 | nfs4_verifier verifier; | |
4145 | struct nfs41_exchange_id_args args = { | |
4146 | .client = clp, | |
4147 | .flags = clp->cl_exchange_flags, | |
4148 | }; | |
4149 | struct nfs41_exchange_id_res res = { | |
4150 | .client = clp, | |
4151 | }; | |
4152 | int status; | |
4153 | struct rpc_message msg = { | |
4154 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], | |
4155 | .rpc_argp = &args, | |
4156 | .rpc_resp = &res, | |
4157 | .rpc_cred = cred, | |
4158 | }; | |
4159 | __be32 *p; | |
4160 | ||
4161 | dprintk("--> %s\n", __func__); | |
4162 | BUG_ON(clp == NULL); | |
4163 | p = (u32 *)verifier.data; | |
4164 | *p++ = htonl((u32)clp->cl_boot_time.tv_sec); | |
4165 | *p = htonl((u32)clp->cl_boot_time.tv_nsec); | |
4166 | args.verifier = &verifier; | |
4167 | ||
4168 | while (1) { | |
4169 | args.id_len = scnprintf(args.id, sizeof(args.id), | |
4170 | "%s/%s %u", | |
4171 | clp->cl_ipaddr, | |
4172 | rpc_peeraddr2str(clp->cl_rpcclient, | |
4173 | RPC_DISPLAY_ADDR), | |
4174 | clp->cl_id_uniquifier); | |
4175 | ||
4176 | status = rpc_call_sync(clp->cl_rpcclient, &msg, 0); | |
4177 | ||
4178 | if (status != NFS4ERR_CLID_INUSE) | |
4179 | break; | |
4180 | ||
4181 | if (signalled()) | |
4182 | break; | |
4183 | ||
4184 | if (++clp->cl_id_uniquifier == 0) | |
4185 | break; | |
4186 | } | |
4187 | ||
4188 | dprintk("<-- %s status= %d\n", __func__, status); | |
4189 | return status; | |
4190 | } | |
4191 | ||
2050f0cc AA |
4192 | struct nfs4_get_lease_time_data { |
4193 | struct nfs4_get_lease_time_args *args; | |
4194 | struct nfs4_get_lease_time_res *res; | |
4195 | struct nfs_client *clp; | |
4196 | }; | |
4197 | ||
4198 | static void nfs4_get_lease_time_prepare(struct rpc_task *task, | |
4199 | void *calldata) | |
4200 | { | |
4201 | int ret; | |
4202 | struct nfs4_get_lease_time_data *data = | |
4203 | (struct nfs4_get_lease_time_data *)calldata; | |
4204 | ||
4205 | dprintk("--> %s\n", __func__); | |
4206 | /* just setup sequence, do not trigger session recovery | |
4207 | since we're invoked within one */ | |
4208 | ret = nfs41_setup_sequence(data->clp->cl_session, | |
4209 | &data->args->la_seq_args, | |
4210 | &data->res->lr_seq_res, 0, task); | |
4211 | ||
4212 | BUG_ON(ret == -EAGAIN); | |
4213 | rpc_call_start(task); | |
4214 | dprintk("<-- %s\n", __func__); | |
4215 | } | |
4216 | ||
4217 | /* | |
4218 | * Called from nfs4_state_manager thread for session setup, so don't recover | |
4219 | * from sequence operation or clientid errors. | |
4220 | */ | |
4221 | static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) | |
4222 | { | |
4223 | struct nfs4_get_lease_time_data *data = | |
4224 | (struct nfs4_get_lease_time_data *)calldata; | |
4225 | ||
4226 | dprintk("--> %s\n", __func__); | |
4227 | nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status); | |
4228 | switch (task->tk_status) { | |
4229 | case -NFS4ERR_DELAY: | |
4230 | case -NFS4ERR_GRACE: | |
4231 | dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); | |
4232 | rpc_delay(task, NFS4_POLL_RETRY_MIN); | |
4233 | task->tk_status = 0; | |
4234 | rpc_restart_call(task); | |
4235 | return; | |
4236 | } | |
4237 | nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res); | |
4238 | dprintk("<-- %s\n", __func__); | |
4239 | } | |
4240 | ||
4241 | struct rpc_call_ops nfs4_get_lease_time_ops = { | |
4242 | .rpc_call_prepare = nfs4_get_lease_time_prepare, | |
4243 | .rpc_call_done = nfs4_get_lease_time_done, | |
4244 | }; | |
4245 | ||
4246 | int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) | |
4247 | { | |
4248 | struct rpc_task *task; | |
4249 | struct nfs4_get_lease_time_args args; | |
4250 | struct nfs4_get_lease_time_res res = { | |
4251 | .lr_fsinfo = fsinfo, | |
4252 | }; | |
4253 | struct nfs4_get_lease_time_data data = { | |
4254 | .args = &args, | |
4255 | .res = &res, | |
4256 | .clp = clp, | |
4257 | }; | |
4258 | struct rpc_message msg = { | |
4259 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], | |
4260 | .rpc_argp = &args, | |
4261 | .rpc_resp = &res, | |
4262 | }; | |
4263 | struct rpc_task_setup task_setup = { | |
4264 | .rpc_client = clp->cl_rpcclient, | |
4265 | .rpc_message = &msg, | |
4266 | .callback_ops = &nfs4_get_lease_time_ops, | |
4267 | .callback_data = &data | |
4268 | }; | |
4269 | int status; | |
4270 | ||
4271 | res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE; | |
4272 | dprintk("--> %s\n", __func__); | |
4273 | task = rpc_run_task(&task_setup); | |
4274 | ||
4275 | if (IS_ERR(task)) | |
4276 | status = PTR_ERR(task); | |
4277 | else { | |
4278 | status = task->tk_status; | |
4279 | rpc_put_task(task); | |
4280 | } | |
4281 | dprintk("<-- %s return %d\n", __func__, status); | |
4282 | ||
4283 | return status; | |
4284 | } | |
4285 | ||
557134a3 AA |
4286 | /* Destroy the slot table */ |
4287 | static void nfs4_destroy_slot_table(struct nfs4_session *session) | |
4288 | { | |
4289 | if (session->fc_slot_table.slots == NULL) | |
4290 | return; | |
4291 | kfree(session->fc_slot_table.slots); | |
4292 | session->fc_slot_table.slots = NULL; | |
4293 | return; | |
4294 | } | |
4295 | ||
4296 | struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp) | |
4297 | { | |
4298 | struct nfs4_session *session; | |
4299 | struct nfs4_slot_table *tbl; | |
4300 | ||
4301 | session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL); | |
4302 | if (!session) | |
4303 | return NULL; | |
4304 | tbl = &session->fc_slot_table; | |
4305 | spin_lock_init(&tbl->slot_tbl_lock); | |
4306 | rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table"); | |
4307 | session->clp = clp; | |
4308 | return session; | |
4309 | } | |
4310 | ||
4311 | void nfs4_destroy_session(struct nfs4_session *session) | |
4312 | { | |
4313 | nfs4_destroy_slot_table(session); | |
4314 | kfree(session); | |
4315 | } | |
4316 | ||
4317 | #endif /* CONFIG_NFS_V4_1 */ | |
4318 | ||
1da177e4 | 4319 | struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = { |
7eff03ae | 4320 | .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, |
b79a4a1b | 4321 | .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, |
1da177e4 LT |
4322 | .recover_open = nfs4_open_reclaim, |
4323 | .recover_lock = nfs4_lock_reclaim, | |
4324 | }; | |
4325 | ||
b79a4a1b | 4326 | struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = { |
7eff03ae | 4327 | .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, |
b79a4a1b | 4328 | .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, |
1da177e4 LT |
4329 | .recover_open = nfs4_open_expired, |
4330 | .recover_lock = nfs4_lock_expired, | |
4331 | }; | |
4332 | ||
92e1d5be | 4333 | static const struct inode_operations nfs4_file_inode_operations = { |
6b3b5496 BF |
4334 | .permission = nfs_permission, |
4335 | .getattr = nfs_getattr, | |
4336 | .setattr = nfs_setattr, | |
4337 | .getxattr = nfs4_getxattr, | |
4338 | .setxattr = nfs4_setxattr, | |
4339 | .listxattr = nfs4_listxattr, | |
4340 | }; | |
4341 | ||
509de811 | 4342 | const struct nfs_rpc_ops nfs_v4_clientops = { |
1da177e4 LT |
4343 | .version = 4, /* protocol version */ |
4344 | .dentry_ops = &nfs4_dentry_operations, | |
4345 | .dir_inode_ops = &nfs4_dir_inode_operations, | |
6b3b5496 | 4346 | .file_inode_ops = &nfs4_file_inode_operations, |
1da177e4 LT |
4347 | .getroot = nfs4_proc_get_root, |
4348 | .getattr = nfs4_proc_getattr, | |
4349 | .setattr = nfs4_proc_setattr, | |
2b3de441 | 4350 | .lookupfh = nfs4_proc_lookupfh, |
1da177e4 LT |
4351 | .lookup = nfs4_proc_lookup, |
4352 | .access = nfs4_proc_access, | |
4353 | .readlink = nfs4_proc_readlink, | |
1da177e4 LT |
4354 | .create = nfs4_proc_create, |
4355 | .remove = nfs4_proc_remove, | |
4356 | .unlink_setup = nfs4_proc_unlink_setup, | |
4357 | .unlink_done = nfs4_proc_unlink_done, | |
4358 | .rename = nfs4_proc_rename, | |
4359 | .link = nfs4_proc_link, | |
4360 | .symlink = nfs4_proc_symlink, | |
4361 | .mkdir = nfs4_proc_mkdir, | |
4362 | .rmdir = nfs4_proc_remove, | |
4363 | .readdir = nfs4_proc_readdir, | |
4364 | .mknod = nfs4_proc_mknod, | |
4365 | .statfs = nfs4_proc_statfs, | |
4366 | .fsinfo = nfs4_proc_fsinfo, | |
4367 | .pathconf = nfs4_proc_pathconf, | |
e9326dca | 4368 | .set_capabilities = nfs4_server_capabilities, |
1da177e4 LT |
4369 | .decode_dirent = nfs4_decode_dirent, |
4370 | .read_setup = nfs4_proc_read_setup, | |
ec06c096 | 4371 | .read_done = nfs4_read_done, |
1da177e4 | 4372 | .write_setup = nfs4_proc_write_setup, |
788e7a89 | 4373 | .write_done = nfs4_write_done, |
1da177e4 | 4374 | .commit_setup = nfs4_proc_commit_setup, |
788e7a89 | 4375 | .commit_done = nfs4_commit_done, |
1da177e4 | 4376 | .lock = nfs4_proc_lock, |
e50a1c2e | 4377 | .clear_acl_cache = nfs4_zap_acl_attr, |
7fe5c398 | 4378 | .close_context = nfs4_close_context, |
1da177e4 LT |
4379 | }; |
4380 | ||
4381 | /* | |
4382 | * Local variables: | |
4383 | * c-basic-offset: 8 | |
4384 | * End: | |
4385 | */ |