nfs41: add a get_clid_cred function to nfs4_state_recovery_ops
[linux-2.6.git] / fs / nfs / nfs4proc.c
1 /*
2  *  fs/nfs/nfs4proc.c
3  *
4  *  Client-side procedure declarations for NFSv4.
5  *
6  *  Copyright (c) 2002 The Regents of the University of Michigan.
7  *  All rights reserved.
8  *
9  *  Kendrick Smith <kmsmith@umich.edu>
10  *  Andy Adamson   <andros@umich.edu>
11  *
12  *  Redistribution and use in source and binary forms, with or without
13  *  modification, are permitted provided that the following conditions
14  *  are met:
15  *
16  *  1. Redistributions of source code must retain the above copyright
17  *     notice, this list of conditions and the following disclaimer.
18  *  2. Redistributions in binary form must reproduce the above copyright
19  *     notice, this list of conditions and the following disclaimer in the
20  *     documentation and/or other materials provided with the distribution.
21  *  3. Neither the name of the University nor the names of its
22  *     contributors may be used to endorse or promote products derived
23  *     from this software without specific prior written permission.
24  *
25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  */
37
38 #include <linux/mm.h>
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
51 #include <linux/module.h>
52
53 #include "nfs4_fs.h"
54 #include "delegation.h"
55 #include "internal.h"
56 #include "iostat.h"
57 #include "callback.h"
58
59 #define NFSDBG_FACILITY         NFSDBG_PROC
60
61 #define NFS4_POLL_RETRY_MIN     (HZ/10)
62 #define NFS4_POLL_RETRY_MAX     (15*HZ)
63
64 struct nfs4_opendata;
65 static int _nfs4_proc_open(struct nfs4_opendata *data);
66 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
67 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70
71 /* Prevent leaks of NFSv4 errors into userland */
72 static int nfs4_map_errors(int err)
73 {
74         if (err < -1000) {
75                 dprintk("%s could not handle NFSv4 error %d\n",
76                                 __func__, -err);
77                 return -EIO;
78         }
79         return err;
80 }
81
82 /*
83  * This is our standard bitmap for GETATTR requests.
84  */
85 const u32 nfs4_fattr_bitmap[2] = {
86         FATTR4_WORD0_TYPE
87         | FATTR4_WORD0_CHANGE
88         | FATTR4_WORD0_SIZE
89         | FATTR4_WORD0_FSID
90         | FATTR4_WORD0_FILEID,
91         FATTR4_WORD1_MODE
92         | FATTR4_WORD1_NUMLINKS
93         | FATTR4_WORD1_OWNER
94         | FATTR4_WORD1_OWNER_GROUP
95         | FATTR4_WORD1_RAWDEV
96         | FATTR4_WORD1_SPACE_USED
97         | FATTR4_WORD1_TIME_ACCESS
98         | FATTR4_WORD1_TIME_METADATA
99         | FATTR4_WORD1_TIME_MODIFY
100 };
101
102 const u32 nfs4_statfs_bitmap[2] = {
103         FATTR4_WORD0_FILES_AVAIL
104         | FATTR4_WORD0_FILES_FREE
105         | FATTR4_WORD0_FILES_TOTAL,
106         FATTR4_WORD1_SPACE_AVAIL
107         | FATTR4_WORD1_SPACE_FREE
108         | FATTR4_WORD1_SPACE_TOTAL
109 };
110
111 const u32 nfs4_pathconf_bitmap[2] = {
112         FATTR4_WORD0_MAXLINK
113         | FATTR4_WORD0_MAXNAME,
114         0
115 };
116
117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118                         | FATTR4_WORD0_MAXREAD
119                         | FATTR4_WORD0_MAXWRITE
120                         | FATTR4_WORD0_LEASE_TIME,
121                         0
122 };
123
124 const u32 nfs4_fs_locations_bitmap[2] = {
125         FATTR4_WORD0_TYPE
126         | FATTR4_WORD0_CHANGE
127         | FATTR4_WORD0_SIZE
128         | FATTR4_WORD0_FSID
129         | FATTR4_WORD0_FILEID
130         | FATTR4_WORD0_FS_LOCATIONS,
131         FATTR4_WORD1_MODE
132         | FATTR4_WORD1_NUMLINKS
133         | FATTR4_WORD1_OWNER
134         | FATTR4_WORD1_OWNER_GROUP
135         | FATTR4_WORD1_RAWDEV
136         | FATTR4_WORD1_SPACE_USED
137         | FATTR4_WORD1_TIME_ACCESS
138         | FATTR4_WORD1_TIME_METADATA
139         | FATTR4_WORD1_TIME_MODIFY
140         | FATTR4_WORD1_MOUNTED_ON_FILEID
141 };
142
143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
144                 struct nfs4_readdir_arg *readdir)
145 {
146         __be32 *start, *p;
147
148         BUG_ON(readdir->count < 80);
149         if (cookie > 2) {
150                 readdir->cookie = cookie;
151                 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152                 return;
153         }
154
155         readdir->cookie = 0;
156         memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157         if (cookie == 2)
158                 return;
159         
160         /*
161          * NFSv4 servers do not return entries for '.' and '..'
162          * Therefore, we fake these entries here.  We let '.'
163          * have cookie 0 and '..' have cookie 1.  Note that
164          * when talking to the server, we always send cookie 0
165          * instead of 1 or 2.
166          */
167         start = p = kmap_atomic(*readdir->pages, KM_USER0);
168         
169         if (cookie == 0) {
170                 *p++ = xdr_one;                                  /* next */
171                 *p++ = xdr_zero;                   /* cookie, first word */
172                 *p++ = xdr_one;                   /* cookie, second word */
173                 *p++ = xdr_one;                             /* entry len */
174                 memcpy(p, ".\0\0\0", 4);                        /* entry */
175                 p++;
176                 *p++ = xdr_one;                         /* bitmap length */
177                 *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
178                 *p++ = htonl(8);              /* attribute buffer length */
179                 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180         }
181         
182         *p++ = xdr_one;                                  /* next */
183         *p++ = xdr_zero;                   /* cookie, first word */
184         *p++ = xdr_two;                   /* cookie, second word */
185         *p++ = xdr_two;                             /* entry len */
186         memcpy(p, "..\0\0", 4);                         /* entry */
187         p++;
188         *p++ = xdr_one;                         /* bitmap length */
189         *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
190         *p++ = htonl(8);              /* attribute buffer length */
191         p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
192
193         readdir->pgbase = (char *)p - (char *)start;
194         readdir->count -= readdir->pgbase;
195         kunmap_atomic(start, KM_USER0);
196 }
197
198 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
199 {
200         int res;
201
202         might_sleep();
203
204         res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
205                         nfs_wait_bit_killable, TASK_KILLABLE);
206         return res;
207 }
208
209 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
210 {
211         int res = 0;
212
213         might_sleep();
214
215         if (*timeout <= 0)
216                 *timeout = NFS4_POLL_RETRY_MIN;
217         if (*timeout > NFS4_POLL_RETRY_MAX)
218                 *timeout = NFS4_POLL_RETRY_MAX;
219         schedule_timeout_killable(*timeout);
220         if (fatal_signal_pending(current))
221                 res = -ERESTARTSYS;
222         *timeout <<= 1;
223         return res;
224 }
225
226 /* This is the error handling routine for processes that are allowed
227  * to sleep.
228  */
229 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
230 {
231         struct nfs_client *clp = server->nfs_client;
232         struct nfs4_state *state = exception->state;
233         int ret = errorcode;
234
235         exception->retry = 0;
236         switch(errorcode) {
237                 case 0:
238                         return 0;
239                 case -NFS4ERR_ADMIN_REVOKED:
240                 case -NFS4ERR_BAD_STATEID:
241                 case -NFS4ERR_OPENMODE:
242                         if (state == NULL)
243                                 break;
244                         nfs4_state_mark_reclaim_nograce(clp, state);
245                 case -NFS4ERR_STALE_CLIENTID:
246                 case -NFS4ERR_STALE_STATEID:
247                 case -NFS4ERR_EXPIRED:
248                         nfs4_schedule_state_recovery(clp);
249                         ret = nfs4_wait_clnt_recover(clp);
250                         if (ret == 0)
251                                 exception->retry = 1;
252 #if !defined(CONFIG_NFS_V4_1)
253                         break;
254 #else /* !defined(CONFIG_NFS_V4_1) */
255                         if (!nfs4_has_session(server->nfs_client))
256                                 break;
257                         /* FALLTHROUGH */
258                 case -NFS4ERR_BADSESSION:
259                 case -NFS4ERR_BADSLOT:
260                 case -NFS4ERR_BAD_HIGH_SLOT:
261                 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
262                 case -NFS4ERR_DEADSESSION:
263                 case -NFS4ERR_SEQ_FALSE_RETRY:
264                 case -NFS4ERR_SEQ_MISORDERED:
265                         dprintk("%s ERROR: %d Reset session\n", __func__,
266                                 errorcode);
267                         set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
268                         exception->retry = 1;
269                         /* FALLTHROUGH */
270 #endif /* !defined(CONFIG_NFS_V4_1) */
271                 case -NFS4ERR_FILE_OPEN:
272                 case -NFS4ERR_GRACE:
273                 case -NFS4ERR_DELAY:
274                         ret = nfs4_delay(server->client, &exception->timeout);
275                         if (ret != 0)
276                                 break;
277                 case -NFS4ERR_OLD_STATEID:
278                         exception->retry = 1;
279         }
280         /* We failed to handle the error */
281         return nfs4_map_errors(ret);
282 }
283
284
285 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
286 {
287         struct nfs_client *clp = server->nfs_client;
288         spin_lock(&clp->cl_lock);
289         if (time_before(clp->cl_last_renewal,timestamp))
290                 clp->cl_last_renewal = timestamp;
291         spin_unlock(&clp->cl_lock);
292 }
293
294 #if defined(CONFIG_NFS_V4_1)
295
296 /*
297  * nfs4_free_slot - free a slot and efficiently update slot table.
298  *
299  * freeing a slot is trivially done by clearing its respective bit
300  * in the bitmap.
301  * If the freed slotid equals highest_used_slotid we want to update it
302  * so that the server would be able to size down the slot table if needed,
303  * otherwise we know that the highest_used_slotid is still in use.
304  * When updating highest_used_slotid there may be "holes" in the bitmap
305  * so we need to scan down from highest_used_slotid to 0 looking for the now
306  * highest slotid in use.
307  * If none found, highest_used_slotid is set to -1.
308  */
309 static void
310 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
311 {
312         int slotid = free_slotid;
313
314         spin_lock(&tbl->slot_tbl_lock);
315         /* clear used bit in bitmap */
316         __clear_bit(slotid, tbl->used_slots);
317
318         /* update highest_used_slotid when it is freed */
319         if (slotid == tbl->highest_used_slotid) {
320                 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
321                 if (slotid >= 0 && slotid < tbl->max_slots)
322                         tbl->highest_used_slotid = slotid;
323                 else
324                         tbl->highest_used_slotid = -1;
325         }
326         rpc_wake_up_next(&tbl->slot_tbl_waitq);
327         spin_unlock(&tbl->slot_tbl_lock);
328         dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
329                 free_slotid, tbl->highest_used_slotid);
330 }
331
332 void nfs41_sequence_free_slot(const struct nfs_client *clp,
333                               struct nfs4_sequence_res *res)
334 {
335         struct nfs4_slot_table *tbl;
336
337         if (!nfs4_has_session(clp)) {
338                 dprintk("%s: No session\n", __func__);
339                 return;
340         }
341         tbl = &clp->cl_session->fc_slot_table;
342         if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
343                 dprintk("%s: No slot\n", __func__);
344                 /* just wake up the next guy waiting since
345                  * we may have not consumed a slot after all */
346                 rpc_wake_up_next(&tbl->slot_tbl_waitq);
347                 return;
348         }
349         nfs4_free_slot(tbl, res->sr_slotid);
350         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
351 }
352
353 static void nfs41_sequence_done(struct nfs_client *clp,
354                                 struct nfs4_sequence_res *res,
355                                 int rpc_status)
356 {
357         unsigned long timestamp;
358         struct nfs4_slot_table *tbl;
359         struct nfs4_slot *slot;
360
361         /*
362          * sr_status remains 1 if an RPC level error occurred. The server
363          * may or may not have processed the sequence operation..
364          * Proceed as if the server received and processed the sequence
365          * operation.
366          */
367         if (res->sr_status == 1)
368                 res->sr_status = NFS_OK;
369
370         /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
371         if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
372                 goto out;
373
374         tbl = &clp->cl_session->fc_slot_table;
375         slot = tbl->slots + res->sr_slotid;
376
377         if (res->sr_status == 0) {
378                 /* Update the slot's sequence and clientid lease timer */
379                 ++slot->seq_nr;
380                 timestamp = res->sr_renewal_time;
381                 spin_lock(&clp->cl_lock);
382                 if (time_before(clp->cl_last_renewal, timestamp))
383                         clp->cl_last_renewal = timestamp;
384                 spin_unlock(&clp->cl_lock);
385                 return;
386         }
387 out:
388         /* The session may be reset by one of the error handlers. */
389         dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
390         nfs41_sequence_free_slot(clp, res);
391 }
392
393 /*
394  * nfs4_find_slot - efficiently look for a free slot
395  *
396  * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
397  * If found, we mark the slot as used, update the highest_used_slotid,
398  * and respectively set up the sequence operation args.
399  * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
400  *
401  * Note: must be called with under the slot_tbl_lock.
402  */
403 static u8
404 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
405 {
406         int slotid;
407         u8 ret_id = NFS4_MAX_SLOT_TABLE;
408         BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
409
410         dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
411                 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
412                 tbl->max_slots);
413         slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
414         if (slotid >= tbl->max_slots)
415                 goto out;
416         __set_bit(slotid, tbl->used_slots);
417         if (slotid > tbl->highest_used_slotid)
418                 tbl->highest_used_slotid = slotid;
419         ret_id = slotid;
420 out:
421         dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
422                 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
423         return ret_id;
424 }
425
426 static int nfs4_recover_session(struct nfs4_session *session)
427 {
428         struct nfs_client *clp = session->clp;
429         int ret;
430
431         for (;;) {
432                 ret = nfs4_wait_clnt_recover(clp);
433                 if (ret != 0)
434                                 return ret;
435                 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
436                         break;
437                 nfs4_schedule_state_manager(clp);
438         }
439         return 0;
440 }
441
442 static int nfs41_setup_sequence(struct nfs4_session *session,
443                                 struct nfs4_sequence_args *args,
444                                 struct nfs4_sequence_res *res,
445                                 int cache_reply,
446                                 struct rpc_task *task)
447 {
448         struct nfs4_slot *slot;
449         struct nfs4_slot_table *tbl;
450         int status = 0;
451         u8 slotid;
452
453         dprintk("--> %s\n", __func__);
454         /* slot already allocated? */
455         if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
456                 return 0;
457
458         memset(res, 0, sizeof(*res));
459         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
460         tbl = &session->fc_slot_table;
461
462         spin_lock(&tbl->slot_tbl_lock);
463         if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
464                 if (tbl->highest_used_slotid != -1) {
465                         rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
466                         spin_unlock(&tbl->slot_tbl_lock);
467                         dprintk("<-- %s: Session reset: draining\n", __func__);
468                         return -EAGAIN;
469                 }
470
471                 /* The slot table is empty; start the reset thread */
472                 dprintk("%s Session Reset\n", __func__);
473                 spin_unlock(&tbl->slot_tbl_lock);
474                 status = nfs4_recover_session(session);
475                 if (status)
476                         return status;
477                 spin_lock(&tbl->slot_tbl_lock);
478         }
479
480         slotid = nfs4_find_slot(tbl, task);
481         if (slotid == NFS4_MAX_SLOT_TABLE) {
482                 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
483                 spin_unlock(&tbl->slot_tbl_lock);
484                 dprintk("<-- %s: no free slots\n", __func__);
485                 return -EAGAIN;
486         }
487         spin_unlock(&tbl->slot_tbl_lock);
488
489         slot = tbl->slots + slotid;
490         args->sa_session = session;
491         args->sa_slotid = slotid;
492         args->sa_cache_this = cache_reply;
493
494         dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
495
496         res->sr_session = session;
497         res->sr_slotid = slotid;
498         res->sr_renewal_time = jiffies;
499         /*
500          * sr_status is only set in decode_sequence, and so will remain
501          * set to 1 if an rpc level failure occurs.
502          */
503         res->sr_status = 1;
504         return 0;
505 }
506
507 int nfs4_setup_sequence(struct nfs_client *clp,
508                         struct nfs4_sequence_args *args,
509                         struct nfs4_sequence_res *res,
510                         int cache_reply,
511                         struct rpc_task *task)
512 {
513         int ret = 0;
514
515         dprintk("--> %s clp %p session %p sr_slotid %d\n",
516                 __func__, clp, clp->cl_session, res->sr_slotid);
517
518         if (!nfs4_has_session(clp))
519                 goto out;
520         ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
521                                    task);
522         if (ret != -EAGAIN) {
523                 /* terminate rpc task */
524                 task->tk_status = ret;
525                 task->tk_action = NULL;
526         }
527 out:
528         dprintk("<-- %s status=%d\n", __func__, ret);
529         return ret;
530 }
531
532 struct nfs41_call_sync_data {
533         struct nfs_client *clp;
534         struct nfs4_sequence_args *seq_args;
535         struct nfs4_sequence_res *seq_res;
536         int cache_reply;
537 };
538
539 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
540 {
541         struct nfs41_call_sync_data *data = calldata;
542
543         dprintk("--> %s data->clp->cl_session %p\n", __func__,
544                 data->clp->cl_session);
545         if (nfs4_setup_sequence(data->clp, data->seq_args,
546                                 data->seq_res, data->cache_reply, task))
547                 return;
548         rpc_call_start(task);
549 }
550
551 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
552 {
553         struct nfs41_call_sync_data *data = calldata;
554
555         nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556         nfs41_sequence_free_slot(data->clp, data->seq_res);
557 }
558
559 struct rpc_call_ops nfs41_call_sync_ops = {
560         .rpc_call_prepare = nfs41_call_sync_prepare,
561         .rpc_call_done = nfs41_call_sync_done,
562 };
563
564 static int nfs4_call_sync_sequence(struct nfs_client *clp,
565                                    struct rpc_clnt *clnt,
566                                    struct rpc_message *msg,
567                                    struct nfs4_sequence_args *args,
568                                    struct nfs4_sequence_res *res,
569                                    int cache_reply)
570 {
571         int ret;
572         struct rpc_task *task;
573         struct nfs41_call_sync_data data = {
574                 .clp = clp,
575                 .seq_args = args,
576                 .seq_res = res,
577                 .cache_reply = cache_reply,
578         };
579         struct rpc_task_setup task_setup = {
580                 .rpc_client = clnt,
581                 .rpc_message = msg,
582                 .callback_ops = &nfs41_call_sync_ops,
583                 .callback_data = &data
584         };
585
586         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
587         task = rpc_run_task(&task_setup);
588         if (IS_ERR(task))
589                 ret = PTR_ERR(task);
590         else {
591                 ret = task->tk_status;
592                 rpc_put_task(task);
593         }
594         return ret;
595 }
596
597 int _nfs4_call_sync_session(struct nfs_server *server,
598                             struct rpc_message *msg,
599                             struct nfs4_sequence_args *args,
600                             struct nfs4_sequence_res *res,
601                             int cache_reply)
602 {
603         return nfs4_call_sync_sequence(server->nfs_client, server->client,
604                                        msg, args, res, cache_reply);
605 }
606
607 #endif /* CONFIG_NFS_V4_1 */
608
609 int _nfs4_call_sync(struct nfs_server *server,
610                     struct rpc_message *msg,
611                     struct nfs4_sequence_args *args,
612                     struct nfs4_sequence_res *res,
613                     int cache_reply)
614 {
615         args->sa_session = res->sr_session = NULL;
616         return rpc_call_sync(server->client, msg, 0);
617 }
618
619 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
620         (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
621                         &(res)->seq_res, (cache_reply))
622
623 static void nfs4_sequence_done(const struct nfs_server *server,
624                                struct nfs4_sequence_res *res, int rpc_status)
625 {
626 #ifdef CONFIG_NFS_V4_1
627         if (nfs4_has_session(server->nfs_client))
628                 nfs41_sequence_done(server->nfs_client, res, rpc_status);
629 #endif /* CONFIG_NFS_V4_1 */
630 }
631
632 /* no restart, therefore free slot here */
633 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
634                                          struct nfs4_sequence_res *res,
635                                          int rpc_status)
636 {
637         nfs4_sequence_done(server, res, rpc_status);
638         nfs4_sequence_free_slot(server->nfs_client, res);
639 }
640
641 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
642 {
643         struct nfs_inode *nfsi = NFS_I(dir);
644
645         spin_lock(&dir->i_lock);
646         nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
647         if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
648                 nfs_force_lookup_revalidate(dir);
649         nfsi->change_attr = cinfo->after;
650         spin_unlock(&dir->i_lock);
651 }
652
653 struct nfs4_opendata {
654         struct kref kref;
655         struct nfs_openargs o_arg;
656         struct nfs_openres o_res;
657         struct nfs_open_confirmargs c_arg;
658         struct nfs_open_confirmres c_res;
659         struct nfs_fattr f_attr;
660         struct nfs_fattr dir_attr;
661         struct path path;
662         struct dentry *dir;
663         struct nfs4_state_owner *owner;
664         struct nfs4_state *state;
665         struct iattr attrs;
666         unsigned long timestamp;
667         unsigned int rpc_done : 1;
668         int rpc_status;
669         int cancelled;
670 };
671
672
673 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
674 {
675         p->o_res.f_attr = &p->f_attr;
676         p->o_res.dir_attr = &p->dir_attr;
677         p->o_res.seqid = p->o_arg.seqid;
678         p->c_res.seqid = p->c_arg.seqid;
679         p->o_res.server = p->o_arg.server;
680         nfs_fattr_init(&p->f_attr);
681         nfs_fattr_init(&p->dir_attr);
682 }
683
684 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
685                 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
686                 const struct iattr *attrs)
687 {
688         struct dentry *parent = dget_parent(path->dentry);
689         struct inode *dir = parent->d_inode;
690         struct nfs_server *server = NFS_SERVER(dir);
691         struct nfs4_opendata *p;
692
693         p = kzalloc(sizeof(*p), GFP_KERNEL);
694         if (p == NULL)
695                 goto err;
696         p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697         if (p->o_arg.seqid == NULL)
698                 goto err_free;
699         p->path.mnt = mntget(path->mnt);
700         p->path.dentry = dget(path->dentry);
701         p->dir = parent;
702         p->owner = sp;
703         atomic_inc(&sp->so_count);
704         p->o_arg.fh = NFS_FH(dir);
705         p->o_arg.open_flags = flags;
706         p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
707         p->o_arg.clientid = server->nfs_client->cl_clientid;
708         p->o_arg.id = sp->so_owner_id.id;
709         p->o_arg.name = &p->path.dentry->d_name;
710         p->o_arg.server = server;
711         p->o_arg.bitmask = server->attr_bitmask;
712         p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
713         p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
714         if (flags & O_EXCL) {
715                 u32 *s = (u32 *) p->o_arg.u.verifier.data;
716                 s[0] = jiffies;
717                 s[1] = current->pid;
718         } else if (flags & O_CREAT) {
719                 p->o_arg.u.attrs = &p->attrs;
720                 memcpy(&p->attrs, attrs, sizeof(p->attrs));
721         }
722         p->c_arg.fh = &p->o_res.fh;
723         p->c_arg.stateid = &p->o_res.stateid;
724         p->c_arg.seqid = p->o_arg.seqid;
725         nfs4_init_opendata_res(p);
726         kref_init(&p->kref);
727         return p;
728 err_free:
729         kfree(p);
730 err:
731         dput(parent);
732         return NULL;
733 }
734
735 static void nfs4_opendata_free(struct kref *kref)
736 {
737         struct nfs4_opendata *p = container_of(kref,
738                         struct nfs4_opendata, kref);
739
740         nfs_free_seqid(p->o_arg.seqid);
741         if (p->state != NULL)
742                 nfs4_put_open_state(p->state);
743         nfs4_put_state_owner(p->owner);
744         dput(p->dir);
745         path_put(&p->path);
746         kfree(p);
747 }
748
749 static void nfs4_opendata_put(struct nfs4_opendata *p)
750 {
751         if (p != NULL)
752                 kref_put(&p->kref, nfs4_opendata_free);
753 }
754
755 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
756 {
757         int ret;
758
759         ret = rpc_wait_for_completion_task(task);
760         return ret;
761 }
762
763 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
764 {
765         int ret = 0;
766
767         if (open_mode & O_EXCL)
768                 goto out;
769         switch (mode & (FMODE_READ|FMODE_WRITE)) {
770                 case FMODE_READ:
771                         ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
772                         break;
773                 case FMODE_WRITE:
774                         ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
775                         break;
776                 case FMODE_READ|FMODE_WRITE:
777                         ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
778         }
779 out:
780         return ret;
781 }
782
783 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
784 {
785         if ((delegation->type & fmode) != fmode)
786                 return 0;
787         if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
788                 return 0;
789         nfs_mark_delegation_referenced(delegation);
790         return 1;
791 }
792
793 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
794 {
795         switch (fmode) {
796                 case FMODE_WRITE:
797                         state->n_wronly++;
798                         break;
799                 case FMODE_READ:
800                         state->n_rdonly++;
801                         break;
802                 case FMODE_READ|FMODE_WRITE:
803                         state->n_rdwr++;
804         }
805         nfs4_state_set_mode_locked(state, state->state | fmode);
806 }
807
808 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
809 {
810         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
811                 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
812         memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
813         switch (fmode) {
814                 case FMODE_READ:
815                         set_bit(NFS_O_RDONLY_STATE, &state->flags);
816                         break;
817                 case FMODE_WRITE:
818                         set_bit(NFS_O_WRONLY_STATE, &state->flags);
819                         break;
820                 case FMODE_READ|FMODE_WRITE:
821                         set_bit(NFS_O_RDWR_STATE, &state->flags);
822         }
823 }
824
825 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
826 {
827         write_seqlock(&state->seqlock);
828         nfs_set_open_stateid_locked(state, stateid, fmode);
829         write_sequnlock(&state->seqlock);
830 }
831
832 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
833 {
834         /*
835          * Protect the call to nfs4_state_set_mode_locked and
836          * serialise the stateid update
837          */
838         write_seqlock(&state->seqlock);
839         if (deleg_stateid != NULL) {
840                 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
841                 set_bit(NFS_DELEGATED_STATE, &state->flags);
842         }
843         if (open_stateid != NULL)
844                 nfs_set_open_stateid_locked(state, open_stateid, fmode);
845         write_sequnlock(&state->seqlock);
846         spin_lock(&state->owner->so_lock);
847         update_open_stateflags(state, fmode);
848         spin_unlock(&state->owner->so_lock);
849 }
850
851 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
852 {
853         struct nfs_inode *nfsi = NFS_I(state->inode);
854         struct nfs_delegation *deleg_cur;
855         int ret = 0;
856
857         fmode &= (FMODE_READ|FMODE_WRITE);
858
859         rcu_read_lock();
860         deleg_cur = rcu_dereference(nfsi->delegation);
861         if (deleg_cur == NULL)
862                 goto no_delegation;
863
864         spin_lock(&deleg_cur->lock);
865         if (nfsi->delegation != deleg_cur ||
866             (deleg_cur->type & fmode) != fmode)
867                 goto no_delegation_unlock;
868
869         if (delegation == NULL)
870                 delegation = &deleg_cur->stateid;
871         else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
872                 goto no_delegation_unlock;
873
874         nfs_mark_delegation_referenced(deleg_cur);
875         __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
876         ret = 1;
877 no_delegation_unlock:
878         spin_unlock(&deleg_cur->lock);
879 no_delegation:
880         rcu_read_unlock();
881
882         if (!ret && open_stateid != NULL) {
883                 __update_open_stateid(state, open_stateid, NULL, fmode);
884                 ret = 1;
885         }
886
887         return ret;
888 }
889
890
891 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
892 {
893         struct nfs_delegation *delegation;
894
895         rcu_read_lock();
896         delegation = rcu_dereference(NFS_I(inode)->delegation);
897         if (delegation == NULL || (delegation->type & fmode) == fmode) {
898                 rcu_read_unlock();
899                 return;
900         }
901         rcu_read_unlock();
902         nfs_inode_return_delegation(inode);
903 }
904
905 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
906 {
907         struct nfs4_state *state = opendata->state;
908         struct nfs_inode *nfsi = NFS_I(state->inode);
909         struct nfs_delegation *delegation;
910         int open_mode = opendata->o_arg.open_flags & O_EXCL;
911         fmode_t fmode = opendata->o_arg.fmode;
912         nfs4_stateid stateid;
913         int ret = -EAGAIN;
914
915         for (;;) {
916                 if (can_open_cached(state, fmode, open_mode)) {
917                         spin_lock(&state->owner->so_lock);
918                         if (can_open_cached(state, fmode, open_mode)) {
919                                 update_open_stateflags(state, fmode);
920                                 spin_unlock(&state->owner->so_lock);
921                                 goto out_return_state;
922                         }
923                         spin_unlock(&state->owner->so_lock);
924                 }
925                 rcu_read_lock();
926                 delegation = rcu_dereference(nfsi->delegation);
927                 if (delegation == NULL ||
928                     !can_open_delegated(delegation, fmode)) {
929                         rcu_read_unlock();
930                         break;
931                 }
932                 /* Save the delegation */
933                 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
934                 rcu_read_unlock();
935                 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
936                 if (ret != 0)
937                         goto out;
938                 ret = -EAGAIN;
939
940                 /* Try to update the stateid using the delegation */
941                 if (update_open_stateid(state, NULL, &stateid, fmode))
942                         goto out_return_state;
943         }
944 out:
945         return ERR_PTR(ret);
946 out_return_state:
947         atomic_inc(&state->count);
948         return state;
949 }
950
951 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
952 {
953         struct inode *inode;
954         struct nfs4_state *state = NULL;
955         struct nfs_delegation *delegation;
956         int ret;
957
958         if (!data->rpc_done) {
959                 state = nfs4_try_open_cached(data);
960                 goto out;
961         }
962
963         ret = -EAGAIN;
964         if (!(data->f_attr.valid & NFS_ATTR_FATTR))
965                 goto err;
966         inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
967         ret = PTR_ERR(inode);
968         if (IS_ERR(inode))
969                 goto err;
970         ret = -ENOMEM;
971         state = nfs4_get_open_state(inode, data->owner);
972         if (state == NULL)
973                 goto err_put_inode;
974         if (data->o_res.delegation_type != 0) {
975                 int delegation_flags = 0;
976
977                 rcu_read_lock();
978                 delegation = rcu_dereference(NFS_I(inode)->delegation);
979                 if (delegation)
980                         delegation_flags = delegation->flags;
981                 rcu_read_unlock();
982                 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
983                         nfs_inode_set_delegation(state->inode,
984                                         data->owner->so_cred,
985                                         &data->o_res);
986                 else
987                         nfs_inode_reclaim_delegation(state->inode,
988                                         data->owner->so_cred,
989                                         &data->o_res);
990         }
991
992         update_open_stateid(state, &data->o_res.stateid, NULL,
993                         data->o_arg.fmode);
994         iput(inode);
995 out:
996         return state;
997 err_put_inode:
998         iput(inode);
999 err:
1000         return ERR_PTR(ret);
1001 }
1002
1003 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1004 {
1005         struct nfs_inode *nfsi = NFS_I(state->inode);
1006         struct nfs_open_context *ctx;
1007
1008         spin_lock(&state->inode->i_lock);
1009         list_for_each_entry(ctx, &nfsi->open_files, list) {
1010                 if (ctx->state != state)
1011                         continue;
1012                 get_nfs_open_context(ctx);
1013                 spin_unlock(&state->inode->i_lock);
1014                 return ctx;
1015         }
1016         spin_unlock(&state->inode->i_lock);
1017         return ERR_PTR(-ENOENT);
1018 }
1019
1020 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1021 {
1022         struct nfs4_opendata *opendata;
1023
1024         opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1025         if (opendata == NULL)
1026                 return ERR_PTR(-ENOMEM);
1027         opendata->state = state;
1028         atomic_inc(&state->count);
1029         return opendata;
1030 }
1031
1032 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1033 {
1034         struct nfs4_state *newstate;
1035         int ret;
1036
1037         opendata->o_arg.open_flags = 0;
1038         opendata->o_arg.fmode = fmode;
1039         memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1040         memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1041         nfs4_init_opendata_res(opendata);
1042         ret = _nfs4_proc_open(opendata);
1043         if (ret != 0)
1044                 return ret; 
1045         newstate = nfs4_opendata_to_nfs4_state(opendata);
1046         if (IS_ERR(newstate))
1047                 return PTR_ERR(newstate);
1048         nfs4_close_state(&opendata->path, newstate, fmode);
1049         *res = newstate;
1050         return 0;
1051 }
1052
1053 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1054 {
1055         struct nfs4_state *newstate;
1056         int ret;
1057
1058         /* memory barrier prior to reading state->n_* */
1059         clear_bit(NFS_DELEGATED_STATE, &state->flags);
1060         smp_rmb();
1061         if (state->n_rdwr != 0) {
1062                 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1063                 if (ret != 0)
1064                         return ret;
1065                 if (newstate != state)
1066                         return -ESTALE;
1067         }
1068         if (state->n_wronly != 0) {
1069                 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1070                 if (ret != 0)
1071                         return ret;
1072                 if (newstate != state)
1073                         return -ESTALE;
1074         }
1075         if (state->n_rdonly != 0) {
1076                 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1077                 if (ret != 0)
1078                         return ret;
1079                 if (newstate != state)
1080                         return -ESTALE;
1081         }
1082         /*
1083          * We may have performed cached opens for all three recoveries.
1084          * Check if we need to update the current stateid.
1085          */
1086         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1087             memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1088                 write_seqlock(&state->seqlock);
1089                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1090                         memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1091                 write_sequnlock(&state->seqlock);
1092         }
1093         return 0;
1094 }
1095
1096 /*
1097  * OPEN_RECLAIM:
1098  *      reclaim state on the server after a reboot.
1099  */
1100 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1101 {
1102         struct nfs_delegation *delegation;
1103         struct nfs4_opendata *opendata;
1104         fmode_t delegation_type = 0;
1105         int status;
1106
1107         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1108         if (IS_ERR(opendata))
1109                 return PTR_ERR(opendata);
1110         opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1111         opendata->o_arg.fh = NFS_FH(state->inode);
1112         rcu_read_lock();
1113         delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1114         if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1115                 delegation_type = delegation->type;
1116         rcu_read_unlock();
1117         opendata->o_arg.u.delegation_type = delegation_type;
1118         status = nfs4_open_recover(opendata, state);
1119         nfs4_opendata_put(opendata);
1120         return status;
1121 }
1122
1123 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1124 {
1125         struct nfs_server *server = NFS_SERVER(state->inode);
1126         struct nfs4_exception exception = { };
1127         int err;
1128         do {
1129                 err = _nfs4_do_open_reclaim(ctx, state);
1130                 if (err != -NFS4ERR_DELAY)
1131                         break;
1132                 nfs4_handle_exception(server, err, &exception);
1133         } while (exception.retry);
1134         return err;
1135 }
1136
1137 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1138 {
1139         struct nfs_open_context *ctx;
1140         int ret;
1141
1142         ctx = nfs4_state_find_open_context(state);
1143         if (IS_ERR(ctx))
1144                 return PTR_ERR(ctx);
1145         ret = nfs4_do_open_reclaim(ctx, state);
1146         put_nfs_open_context(ctx);
1147         return ret;
1148 }
1149
1150 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1151 {
1152         struct nfs4_opendata *opendata;
1153         int ret;
1154
1155         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1156         if (IS_ERR(opendata))
1157                 return PTR_ERR(opendata);
1158         opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1159         memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1160                         sizeof(opendata->o_arg.u.delegation.data));
1161         ret = nfs4_open_recover(opendata, state);
1162         nfs4_opendata_put(opendata);
1163         return ret;
1164 }
1165
1166 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1167 {
1168         struct nfs4_exception exception = { };
1169         struct nfs_server *server = NFS_SERVER(state->inode);
1170         int err;
1171         do {
1172                 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1173                 switch (err) {
1174                         case 0:
1175                                 return err;
1176                         case -NFS4ERR_STALE_CLIENTID:
1177                         case -NFS4ERR_STALE_STATEID:
1178                         case -NFS4ERR_EXPIRED:
1179                                 /* Don't recall a delegation if it was lost */
1180                                 nfs4_schedule_state_recovery(server->nfs_client);
1181                                 return err;
1182                 }
1183                 err = nfs4_handle_exception(server, err, &exception);
1184         } while (exception.retry);
1185         return err;
1186 }
1187
1188 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1189 {
1190         struct nfs4_opendata *data = calldata;
1191
1192         data->rpc_status = task->tk_status;
1193         if (RPC_ASSASSINATED(task))
1194                 return;
1195         if (data->rpc_status == 0) {
1196                 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1197                                 sizeof(data->o_res.stateid.data));
1198                 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1199                 renew_lease(data->o_res.server, data->timestamp);
1200                 data->rpc_done = 1;
1201         }
1202 }
1203
1204 static void nfs4_open_confirm_release(void *calldata)
1205 {
1206         struct nfs4_opendata *data = calldata;
1207         struct nfs4_state *state = NULL;
1208
1209         /* If this request hasn't been cancelled, do nothing */
1210         if (data->cancelled == 0)
1211                 goto out_free;
1212         /* In case of error, no cleanup! */
1213         if (!data->rpc_done)
1214                 goto out_free;
1215         state = nfs4_opendata_to_nfs4_state(data);
1216         if (!IS_ERR(state))
1217                 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1218 out_free:
1219         nfs4_opendata_put(data);
1220 }
1221
1222 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1223         .rpc_call_done = nfs4_open_confirm_done,
1224         .rpc_release = nfs4_open_confirm_release,
1225 };
1226
1227 /*
1228  * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1229  */
1230 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1231 {
1232         struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1233         struct rpc_task *task;
1234         struct  rpc_message msg = {
1235                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1236                 .rpc_argp = &data->c_arg,
1237                 .rpc_resp = &data->c_res,
1238                 .rpc_cred = data->owner->so_cred,
1239         };
1240         struct rpc_task_setup task_setup_data = {
1241                 .rpc_client = server->client,
1242                 .rpc_message = &msg,
1243                 .callback_ops = &nfs4_open_confirm_ops,
1244                 .callback_data = data,
1245                 .workqueue = nfsiod_workqueue,
1246                 .flags = RPC_TASK_ASYNC,
1247         };
1248         int status;
1249
1250         kref_get(&data->kref);
1251         data->rpc_done = 0;
1252         data->rpc_status = 0;
1253         data->timestamp = jiffies;
1254         task = rpc_run_task(&task_setup_data);
1255         if (IS_ERR(task))
1256                 return PTR_ERR(task);
1257         status = nfs4_wait_for_completion_rpc_task(task);
1258         if (status != 0) {
1259                 data->cancelled = 1;
1260                 smp_wmb();
1261         } else
1262                 status = data->rpc_status;
1263         rpc_put_task(task);
1264         return status;
1265 }
1266
1267 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1268 {
1269         struct nfs4_opendata *data = calldata;
1270         struct nfs4_state_owner *sp = data->owner;
1271
1272         if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1273                 return;
1274         /*
1275          * Check if we still need to send an OPEN call, or if we can use
1276          * a delegation instead.
1277          */
1278         if (data->state != NULL) {
1279                 struct nfs_delegation *delegation;
1280
1281                 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1282                         goto out_no_action;
1283                 rcu_read_lock();
1284                 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1285                 if (delegation != NULL &&
1286                     test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1287                         rcu_read_unlock();
1288                         goto out_no_action;
1289                 }
1290                 rcu_read_unlock();
1291         }
1292         /* Update sequence id. */
1293         data->o_arg.id = sp->so_owner_id.id;
1294         data->o_arg.clientid = sp->so_client->cl_clientid;
1295         if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1296                 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1297                 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1298         }
1299         data->timestamp = jiffies;
1300         if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1301                                 &data->o_arg.seq_args,
1302                                 &data->o_res.seq_res, 1, task))
1303                 return;
1304         rpc_call_start(task);
1305         return;
1306 out_no_action:
1307         task->tk_action = NULL;
1308
1309 }
1310
1311 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1312 {
1313         struct nfs4_opendata *data = calldata;
1314
1315         data->rpc_status = task->tk_status;
1316
1317         nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1318                                      task->tk_status);
1319
1320         if (RPC_ASSASSINATED(task))
1321                 return;
1322         if (task->tk_status == 0) {
1323                 switch (data->o_res.f_attr->mode & S_IFMT) {
1324                         case S_IFREG:
1325                                 break;
1326                         case S_IFLNK:
1327                                 data->rpc_status = -ELOOP;
1328                                 break;
1329                         case S_IFDIR:
1330                                 data->rpc_status = -EISDIR;
1331                                 break;
1332                         default:
1333                                 data->rpc_status = -ENOTDIR;
1334                 }
1335                 renew_lease(data->o_res.server, data->timestamp);
1336                 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1337                         nfs_confirm_seqid(&data->owner->so_seqid, 0);
1338         }
1339         data->rpc_done = 1;
1340 }
1341
1342 static void nfs4_open_release(void *calldata)
1343 {
1344         struct nfs4_opendata *data = calldata;
1345         struct nfs4_state *state = NULL;
1346
1347         /* If this request hasn't been cancelled, do nothing */
1348         if (data->cancelled == 0)
1349                 goto out_free;
1350         /* In case of error, no cleanup! */
1351         if (data->rpc_status != 0 || !data->rpc_done)
1352                 goto out_free;
1353         /* In case we need an open_confirm, no cleanup! */
1354         if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1355                 goto out_free;
1356         state = nfs4_opendata_to_nfs4_state(data);
1357         if (!IS_ERR(state))
1358                 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1359 out_free:
1360         nfs4_opendata_put(data);
1361 }
1362
1363 static const struct rpc_call_ops nfs4_open_ops = {
1364         .rpc_call_prepare = nfs4_open_prepare,
1365         .rpc_call_done = nfs4_open_done,
1366         .rpc_release = nfs4_open_release,
1367 };
1368
1369 /*
1370  * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1371  */
1372 static int _nfs4_proc_open(struct nfs4_opendata *data)
1373 {
1374         struct inode *dir = data->dir->d_inode;
1375         struct nfs_server *server = NFS_SERVER(dir);
1376         struct nfs_openargs *o_arg = &data->o_arg;
1377         struct nfs_openres *o_res = &data->o_res;
1378         struct rpc_task *task;
1379         struct rpc_message msg = {
1380                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1381                 .rpc_argp = o_arg,
1382                 .rpc_resp = o_res,
1383                 .rpc_cred = data->owner->so_cred,
1384         };
1385         struct rpc_task_setup task_setup_data = {
1386                 .rpc_client = server->client,
1387                 .rpc_message = &msg,
1388                 .callback_ops = &nfs4_open_ops,
1389                 .callback_data = data,
1390                 .workqueue = nfsiod_workqueue,
1391                 .flags = RPC_TASK_ASYNC,
1392         };
1393         int status;
1394
1395         kref_get(&data->kref);
1396         data->rpc_done = 0;
1397         data->rpc_status = 0;
1398         data->cancelled = 0;
1399         task = rpc_run_task(&task_setup_data);
1400         if (IS_ERR(task))
1401                 return PTR_ERR(task);
1402         status = nfs4_wait_for_completion_rpc_task(task);
1403         if (status != 0) {
1404                 data->cancelled = 1;
1405                 smp_wmb();
1406         } else
1407                 status = data->rpc_status;
1408         rpc_put_task(task);
1409         if (status != 0 || !data->rpc_done)
1410                 return status;
1411
1412         if (o_res->fh.size == 0)
1413                 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1414
1415         if (o_arg->open_flags & O_CREAT) {
1416                 update_changeattr(dir, &o_res->cinfo);
1417                 nfs_post_op_update_inode(dir, o_res->dir_attr);
1418         } else
1419                 nfs_refresh_inode(dir, o_res->dir_attr);
1420         if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1421                 status = _nfs4_proc_open_confirm(data);
1422                 if (status != 0)
1423                         return status;
1424         }
1425         if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1426                 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1427         return 0;
1428 }
1429
1430 static int nfs4_recover_expired_lease(struct nfs_server *server)
1431 {
1432         struct nfs_client *clp = server->nfs_client;
1433         int ret;
1434
1435         for (;;) {
1436                 ret = nfs4_wait_clnt_recover(clp);
1437                 if (ret != 0)
1438                         return ret;
1439                 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1440                     !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1441                         break;
1442                 nfs4_schedule_state_recovery(clp);
1443         }
1444         return 0;
1445 }
1446
1447 /*
1448  * OPEN_EXPIRED:
1449  *      reclaim state on the server after a network partition.
1450  *      Assumes caller holds the appropriate lock
1451  */
1452 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1453 {
1454         struct nfs4_opendata *opendata;
1455         int ret;
1456
1457         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1458         if (IS_ERR(opendata))
1459                 return PTR_ERR(opendata);
1460         ret = nfs4_open_recover(opendata, state);
1461         if (ret == -ESTALE)
1462                 d_drop(ctx->path.dentry);
1463         nfs4_opendata_put(opendata);
1464         return ret;
1465 }
1466
1467 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1468 {
1469         struct nfs_server *server = NFS_SERVER(state->inode);
1470         struct nfs4_exception exception = { };
1471         int err;
1472
1473         do {
1474                 err = _nfs4_open_expired(ctx, state);
1475                 if (err != -NFS4ERR_DELAY)
1476                         break;
1477                 nfs4_handle_exception(server, err, &exception);
1478         } while (exception.retry);
1479         return err;
1480 }
1481
1482 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1483 {
1484         struct nfs_open_context *ctx;
1485         int ret;
1486
1487         ctx = nfs4_state_find_open_context(state);
1488         if (IS_ERR(ctx))
1489                 return PTR_ERR(ctx);
1490         ret = nfs4_do_open_expired(ctx, state);
1491         put_nfs_open_context(ctx);
1492         return ret;
1493 }
1494
1495 /*
1496  * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1497  * fields corresponding to attributes that were used to store the verifier.
1498  * Make sure we clobber those fields in the later setattr call
1499  */
1500 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1501 {
1502         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1503             !(sattr->ia_valid & ATTR_ATIME_SET))
1504                 sattr->ia_valid |= ATTR_ATIME;
1505
1506         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1507             !(sattr->ia_valid & ATTR_MTIME_SET))
1508                 sattr->ia_valid |= ATTR_MTIME;
1509 }
1510
1511 /*
1512  * Returns a referenced nfs4_state
1513  */
1514 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1515 {
1516         struct nfs4_state_owner  *sp;
1517         struct nfs4_state     *state = NULL;
1518         struct nfs_server       *server = NFS_SERVER(dir);
1519         struct nfs4_opendata *opendata;
1520         int status;
1521
1522         /* Protect against reboot recovery conflicts */
1523         status = -ENOMEM;
1524         if (!(sp = nfs4_get_state_owner(server, cred))) {
1525                 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1526                 goto out_err;
1527         }
1528         status = nfs4_recover_expired_lease(server);
1529         if (status != 0)
1530                 goto err_put_state_owner;
1531         if (path->dentry->d_inode != NULL)
1532                 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1533         status = -ENOMEM;
1534         opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1535         if (opendata == NULL)
1536                 goto err_put_state_owner;
1537
1538         if (path->dentry->d_inode != NULL)
1539                 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1540
1541         status = _nfs4_proc_open(opendata);
1542         if (status != 0)
1543                 goto err_opendata_put;
1544
1545         if (opendata->o_arg.open_flags & O_EXCL)
1546                 nfs4_exclusive_attrset(opendata, sattr);
1547
1548         state = nfs4_opendata_to_nfs4_state(opendata);
1549         status = PTR_ERR(state);
1550         if (IS_ERR(state))
1551                 goto err_opendata_put;
1552         nfs4_opendata_put(opendata);
1553         nfs4_put_state_owner(sp);
1554         *res = state;
1555         return 0;
1556 err_opendata_put:
1557         nfs4_opendata_put(opendata);
1558 err_put_state_owner:
1559         nfs4_put_state_owner(sp);
1560 out_err:
1561         *res = NULL;
1562         return status;
1563 }
1564
1565
1566 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1567 {
1568         struct nfs4_exception exception = { };
1569         struct nfs4_state *res;
1570         int status;
1571
1572         do {
1573                 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1574                 if (status == 0)
1575                         break;
1576                 /* NOTE: BAD_SEQID means the server and client disagree about the
1577                  * book-keeping w.r.t. state-changing operations
1578                  * (OPEN/CLOSE/LOCK/LOCKU...)
1579                  * It is actually a sign of a bug on the client or on the server.
1580                  *
1581                  * If we receive a BAD_SEQID error in the particular case of
1582                  * doing an OPEN, we assume that nfs_increment_open_seqid() will
1583                  * have unhashed the old state_owner for us, and that we can
1584                  * therefore safely retry using a new one. We should still warn
1585                  * the user though...
1586                  */
1587                 if (status == -NFS4ERR_BAD_SEQID) {
1588                         printk(KERN_WARNING "NFS: v4 server %s "
1589                                         " returned a bad sequence-id error!\n",
1590                                         NFS_SERVER(dir)->nfs_client->cl_hostname);
1591                         exception.retry = 1;
1592                         continue;
1593                 }
1594                 /*
1595                  * BAD_STATEID on OPEN means that the server cancelled our
1596                  * state before it received the OPEN_CONFIRM.
1597                  * Recover by retrying the request as per the discussion
1598                  * on Page 181 of RFC3530.
1599                  */
1600                 if (status == -NFS4ERR_BAD_STATEID) {
1601                         exception.retry = 1;
1602                         continue;
1603                 }
1604                 if (status == -EAGAIN) {
1605                         /* We must have found a delegation */
1606                         exception.retry = 1;
1607                         continue;
1608                 }
1609                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1610                                         status, &exception));
1611         } while (exception.retry);
1612         return res;
1613 }
1614
1615 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1616                             struct nfs_fattr *fattr, struct iattr *sattr,
1617                             struct nfs4_state *state)
1618 {
1619         struct nfs_server *server = NFS_SERVER(inode);
1620         struct nfs_setattrargs  arg = {
1621                 .fh             = NFS_FH(inode),
1622                 .iap            = sattr,
1623                 .server         = server,
1624                 .bitmask = server->attr_bitmask,
1625         };
1626         struct nfs_setattrres  res = {
1627                 .fattr          = fattr,
1628                 .server         = server,
1629         };
1630         struct rpc_message msg = {
1631                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1632                 .rpc_argp       = &arg,
1633                 .rpc_resp       = &res,
1634                 .rpc_cred       = cred,
1635         };
1636         unsigned long timestamp = jiffies;
1637         int status;
1638
1639         nfs_fattr_init(fattr);
1640
1641         if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1642                 /* Use that stateid */
1643         } else if (state != NULL) {
1644                 nfs4_copy_stateid(&arg.stateid, state, current->files);
1645         } else
1646                 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1647
1648         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1649         if (status == 0 && state != NULL)
1650                 renew_lease(server, timestamp);
1651         return status;
1652 }
1653
1654 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1655                            struct nfs_fattr *fattr, struct iattr *sattr,
1656                            struct nfs4_state *state)
1657 {
1658         struct nfs_server *server = NFS_SERVER(inode);
1659         struct nfs4_exception exception = { };
1660         int err;
1661         do {
1662                 err = nfs4_handle_exception(server,
1663                                 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1664                                 &exception);
1665         } while (exception.retry);
1666         return err;
1667 }
1668
1669 struct nfs4_closedata {
1670         struct path path;
1671         struct inode *inode;
1672         struct nfs4_state *state;
1673         struct nfs_closeargs arg;
1674         struct nfs_closeres res;
1675         struct nfs_fattr fattr;
1676         unsigned long timestamp;
1677 };
1678
1679 static void nfs4_free_closedata(void *data)
1680 {
1681         struct nfs4_closedata *calldata = data;
1682         struct nfs4_state_owner *sp = calldata->state->owner;
1683
1684         nfs4_put_open_state(calldata->state);
1685         nfs_free_seqid(calldata->arg.seqid);
1686         nfs4_put_state_owner(sp);
1687         path_put(&calldata->path);
1688         kfree(calldata);
1689 }
1690
1691 static void nfs4_close_done(struct rpc_task *task, void *data)
1692 {
1693         struct nfs4_closedata *calldata = data;
1694         struct nfs4_state *state = calldata->state;
1695         struct nfs_server *server = NFS_SERVER(calldata->inode);
1696
1697         nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1698         if (RPC_ASSASSINATED(task))
1699                 return;
1700         /* hmm. we are done with the inode, and in the process of freeing
1701          * the state_owner. we keep this around to process errors
1702          */
1703         switch (task->tk_status) {
1704                 case 0:
1705                         nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1706                         renew_lease(server, calldata->timestamp);
1707                         break;
1708                 case -NFS4ERR_STALE_STATEID:
1709                 case -NFS4ERR_OLD_STATEID:
1710                 case -NFS4ERR_BAD_STATEID:
1711                 case -NFS4ERR_EXPIRED:
1712                         if (calldata->arg.fmode == 0)
1713                                 break;
1714                 default:
1715                         if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1716                                 nfs4_restart_rpc(task, server->nfs_client);
1717                                 return;
1718                         }
1719         }
1720         nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1721         nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1722 }
1723
1724 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1725 {
1726         struct nfs4_closedata *calldata = data;
1727         struct nfs4_state *state = calldata->state;
1728         int clear_rd, clear_wr, clear_rdwr;
1729
1730         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1731                 return;
1732
1733         clear_rd = clear_wr = clear_rdwr = 0;
1734         spin_lock(&state->owner->so_lock);
1735         /* Calculate the change in open mode */
1736         if (state->n_rdwr == 0) {
1737                 if (state->n_rdonly == 0) {
1738                         clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1739                         clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1740                 }
1741                 if (state->n_wronly == 0) {
1742                         clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1743                         clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1744                 }
1745         }
1746         spin_unlock(&state->owner->so_lock);
1747         if (!clear_rd && !clear_wr && !clear_rdwr) {
1748                 /* Note: exit _without_ calling nfs4_close_done */
1749                 task->tk_action = NULL;
1750                 return;
1751         }
1752         nfs_fattr_init(calldata->res.fattr);
1753         if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1754                 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1755                 calldata->arg.fmode = FMODE_READ;
1756         } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1757                 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1758                 calldata->arg.fmode = FMODE_WRITE;
1759         }
1760         calldata->timestamp = jiffies;
1761         if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1762                                 &calldata->arg.seq_args, &calldata->res.seq_res,
1763                                 1, task))
1764                 return;
1765         rpc_call_start(task);
1766 }
1767
1768 static const struct rpc_call_ops nfs4_close_ops = {
1769         .rpc_call_prepare = nfs4_close_prepare,
1770         .rpc_call_done = nfs4_close_done,
1771         .rpc_release = nfs4_free_closedata,
1772 };
1773
1774 /* 
1775  * It is possible for data to be read/written from a mem-mapped file 
1776  * after the sys_close call (which hits the vfs layer as a flush).
1777  * This means that we can't safely call nfsv4 close on a file until 
1778  * the inode is cleared. This in turn means that we are not good
1779  * NFSv4 citizens - we do not indicate to the server to update the file's 
1780  * share state even when we are done with one of the three share 
1781  * stateid's in the inode.
1782  *
1783  * NOTE: Caller must be holding the sp->so_owner semaphore!
1784  */
1785 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1786 {
1787         struct nfs_server *server = NFS_SERVER(state->inode);
1788         struct nfs4_closedata *calldata;
1789         struct nfs4_state_owner *sp = state->owner;
1790         struct rpc_task *task;
1791         struct rpc_message msg = {
1792                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1793                 .rpc_cred = state->owner->so_cred,
1794         };
1795         struct rpc_task_setup task_setup_data = {
1796                 .rpc_client = server->client,
1797                 .rpc_message = &msg,
1798                 .callback_ops = &nfs4_close_ops,
1799                 .workqueue = nfsiod_workqueue,
1800                 .flags = RPC_TASK_ASYNC,
1801         };
1802         int status = -ENOMEM;
1803
1804         calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1805         if (calldata == NULL)
1806                 goto out;
1807         calldata->inode = state->inode;
1808         calldata->state = state;
1809         calldata->arg.fh = NFS_FH(state->inode);
1810         calldata->arg.stateid = &state->open_stateid;
1811         /* Serialization for the sequence id */
1812         calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1813         if (calldata->arg.seqid == NULL)
1814                 goto out_free_calldata;
1815         calldata->arg.fmode = 0;
1816         calldata->arg.bitmask = server->cache_consistency_bitmask;
1817         calldata->res.fattr = &calldata->fattr;
1818         calldata->res.seqid = calldata->arg.seqid;
1819         calldata->res.server = server;
1820         calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1821         calldata->path.mnt = mntget(path->mnt);
1822         calldata->path.dentry = dget(path->dentry);
1823
1824         msg.rpc_argp = &calldata->arg,
1825         msg.rpc_resp = &calldata->res,
1826         task_setup_data.callback_data = calldata;
1827         task = rpc_run_task(&task_setup_data);
1828         if (IS_ERR(task))
1829                 return PTR_ERR(task);
1830         status = 0;
1831         if (wait)
1832                 status = rpc_wait_for_completion_task(task);
1833         rpc_put_task(task);
1834         return status;
1835 out_free_calldata:
1836         kfree(calldata);
1837 out:
1838         nfs4_put_open_state(state);
1839         nfs4_put_state_owner(sp);
1840         return status;
1841 }
1842
1843 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1844 {
1845         struct file *filp;
1846         int ret;
1847
1848         /* If the open_intent is for execute, we have an extra check to make */
1849         if (fmode & FMODE_EXEC) {
1850                 ret = nfs_may_open(state->inode,
1851                                 state->owner->so_cred,
1852                                 nd->intent.open.flags);
1853                 if (ret < 0)
1854                         goto out_close;
1855         }
1856         filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1857         if (!IS_ERR(filp)) {
1858                 struct nfs_open_context *ctx;
1859                 ctx = nfs_file_open_context(filp);
1860                 ctx->state = state;
1861                 return 0;
1862         }
1863         ret = PTR_ERR(filp);
1864 out_close:
1865         nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1866         return ret;
1867 }
1868
1869 struct dentry *
1870 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1871 {
1872         struct path path = {
1873                 .mnt = nd->path.mnt,
1874                 .dentry = dentry,
1875         };
1876         struct dentry *parent;
1877         struct iattr attr;
1878         struct rpc_cred *cred;
1879         struct nfs4_state *state;
1880         struct dentry *res;
1881         fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1882
1883         if (nd->flags & LOOKUP_CREATE) {
1884                 attr.ia_mode = nd->intent.open.create_mode;
1885                 attr.ia_valid = ATTR_MODE;
1886                 if (!IS_POSIXACL(dir))
1887                         attr.ia_mode &= ~current_umask();
1888         } else {
1889                 attr.ia_valid = 0;
1890                 BUG_ON(nd->intent.open.flags & O_CREAT);
1891         }
1892
1893         cred = rpc_lookup_cred();
1894         if (IS_ERR(cred))
1895                 return (struct dentry *)cred;
1896         parent = dentry->d_parent;
1897         /* Protect against concurrent sillydeletes */
1898         nfs_block_sillyrename(parent);
1899         state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1900         put_rpccred(cred);
1901         if (IS_ERR(state)) {
1902                 if (PTR_ERR(state) == -ENOENT) {
1903                         d_add(dentry, NULL);
1904                         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1905                 }
1906                 nfs_unblock_sillyrename(parent);
1907                 return (struct dentry *)state;
1908         }
1909         res = d_add_unique(dentry, igrab(state->inode));
1910         if (res != NULL)
1911                 path.dentry = res;
1912         nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1913         nfs_unblock_sillyrename(parent);
1914         nfs4_intent_set_file(nd, &path, state, fmode);
1915         return res;
1916 }
1917
1918 int
1919 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1920 {
1921         struct path path = {
1922                 .mnt = nd->path.mnt,
1923                 .dentry = dentry,
1924         };
1925         struct rpc_cred *cred;
1926         struct nfs4_state *state;
1927         fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1928
1929         cred = rpc_lookup_cred();
1930         if (IS_ERR(cred))
1931                 return PTR_ERR(cred);
1932         state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1933         put_rpccred(cred);
1934         if (IS_ERR(state)) {
1935                 switch (PTR_ERR(state)) {
1936                         case -EPERM:
1937                         case -EACCES:
1938                         case -EDQUOT:
1939                         case -ENOSPC:
1940                         case -EROFS:
1941                                 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1942                                 return 1;
1943                         default:
1944                                 goto out_drop;
1945                 }
1946         }
1947         if (state->inode == dentry->d_inode) {
1948                 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1949                 nfs4_intent_set_file(nd, &path, state, fmode);
1950                 return 1;
1951         }
1952         nfs4_close_sync(&path, state, fmode);
1953 out_drop:
1954         d_drop(dentry);
1955         return 0;
1956 }
1957
1958 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1959 {
1960         if (ctx->state == NULL)
1961                 return;
1962         if (is_sync)
1963                 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1964         else
1965                 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1966 }
1967
1968 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1969 {
1970         struct nfs4_server_caps_arg args = {
1971                 .fhandle = fhandle,
1972         };
1973         struct nfs4_server_caps_res res = {};
1974         struct rpc_message msg = {
1975                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1976                 .rpc_argp = &args,
1977                 .rpc_resp = &res,
1978         };
1979         int status;
1980
1981         status = nfs4_call_sync(server, &msg, &args, &res, 0);
1982         if (status == 0) {
1983                 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1984                 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1985                         server->caps |= NFS_CAP_ACLS;
1986                 if (res.has_links != 0)
1987                         server->caps |= NFS_CAP_HARDLINKS;
1988                 if (res.has_symlinks != 0)
1989                         server->caps |= NFS_CAP_SYMLINKS;
1990                 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1991                 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1992                 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1993                 server->acl_bitmask = res.acl_bitmask;
1994         }
1995
1996         return status;
1997 }
1998
1999 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2000 {
2001         struct nfs4_exception exception = { };
2002         int err;
2003         do {
2004                 err = nfs4_handle_exception(server,
2005                                 _nfs4_server_capabilities(server, fhandle),
2006                                 &exception);
2007         } while (exception.retry);
2008         return err;
2009 }
2010
2011 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2012                 struct nfs_fsinfo *info)
2013 {
2014         struct nfs4_lookup_root_arg args = {
2015                 .bitmask = nfs4_fattr_bitmap,
2016         };
2017         struct nfs4_lookup_res res = {
2018                 .server = server,
2019                 .fattr = info->fattr,
2020                 .fh = fhandle,
2021         };
2022         struct rpc_message msg = {
2023                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2024                 .rpc_argp = &args,
2025                 .rpc_resp = &res,
2026         };
2027         nfs_fattr_init(info->fattr);
2028         return nfs4_call_sync(server, &msg, &args, &res, 0);
2029 }
2030
2031 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2032                 struct nfs_fsinfo *info)
2033 {
2034         struct nfs4_exception exception = { };
2035         int err;
2036         do {
2037                 err = nfs4_handle_exception(server,
2038                                 _nfs4_lookup_root(server, fhandle, info),
2039                                 &exception);
2040         } while (exception.retry);
2041         return err;
2042 }
2043
2044 /*
2045  * get the file handle for the "/" directory on the server
2046  */
2047 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2048                               struct nfs_fsinfo *info)
2049 {
2050         int status;
2051
2052         status = nfs4_lookup_root(server, fhandle, info);
2053         if (status == 0)
2054                 status = nfs4_server_capabilities(server, fhandle);
2055         if (status == 0)
2056                 status = nfs4_do_fsinfo(server, fhandle, info);
2057         return nfs4_map_errors(status);
2058 }
2059
2060 /*
2061  * Get locations and (maybe) other attributes of a referral.
2062  * Note that we'll actually follow the referral later when
2063  * we detect fsid mismatch in inode revalidation
2064  */
2065 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2066 {
2067         int status = -ENOMEM;
2068         struct page *page = NULL;
2069         struct nfs4_fs_locations *locations = NULL;
2070
2071         page = alloc_page(GFP_KERNEL);
2072         if (page == NULL)
2073                 goto out;
2074         locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2075         if (locations == NULL)
2076                 goto out;
2077
2078         status = nfs4_proc_fs_locations(dir, name, locations, page);
2079         if (status != 0)
2080                 goto out;
2081         /* Make sure server returned a different fsid for the referral */
2082         if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2083                 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2084                 status = -EIO;
2085                 goto out;
2086         }
2087
2088         memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2089         fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2090         if (!fattr->mode)
2091                 fattr->mode = S_IFDIR;
2092         memset(fhandle, 0, sizeof(struct nfs_fh));
2093 out:
2094         if (page)
2095                 __free_page(page);
2096         if (locations)
2097                 kfree(locations);
2098         return status;
2099 }
2100
2101 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2102 {
2103         struct nfs4_getattr_arg args = {
2104                 .fh = fhandle,
2105                 .bitmask = server->attr_bitmask,
2106         };
2107         struct nfs4_getattr_res res = {
2108                 .fattr = fattr,
2109                 .server = server,
2110         };
2111         struct rpc_message msg = {
2112                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2113                 .rpc_argp = &args,
2114                 .rpc_resp = &res,
2115         };
2116         
2117         nfs_fattr_init(fattr);
2118         return nfs4_call_sync(server, &msg, &args, &res, 0);
2119 }
2120
2121 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2122 {
2123         struct nfs4_exception exception = { };
2124         int err;
2125         do {
2126                 err = nfs4_handle_exception(server,
2127                                 _nfs4_proc_getattr(server, fhandle, fattr),
2128                                 &exception);
2129         } while (exception.retry);
2130         return err;
2131 }
2132
2133 /* 
2134  * The file is not closed if it is opened due to the a request to change
2135  * the size of the file. The open call will not be needed once the
2136  * VFS layer lookup-intents are implemented.
2137  *
2138  * Close is called when the inode is destroyed.
2139  * If we haven't opened the file for O_WRONLY, we
2140  * need to in the size_change case to obtain a stateid.
2141  *
2142  * Got race?
2143  * Because OPEN is always done by name in nfsv4, it is
2144  * possible that we opened a different file by the same
2145  * name.  We can recognize this race condition, but we
2146  * can't do anything about it besides returning an error.
2147  *
2148  * This will be fixed with VFS changes (lookup-intent).
2149  */
2150 static int
2151 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2152                   struct iattr *sattr)
2153 {
2154         struct inode *inode = dentry->d_inode;
2155         struct rpc_cred *cred = NULL;
2156         struct nfs4_state *state = NULL;
2157         int status;
2158
2159         nfs_fattr_init(fattr);
2160         
2161         /* Search for an existing open(O_WRITE) file */
2162         if (sattr->ia_valid & ATTR_FILE) {
2163                 struct nfs_open_context *ctx;
2164
2165                 ctx = nfs_file_open_context(sattr->ia_file);
2166                 if (ctx) {
2167                         cred = ctx->cred;
2168                         state = ctx->state;
2169                 }
2170         }
2171
2172         status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2173         if (status == 0)
2174                 nfs_setattr_update_inode(inode, sattr);
2175         return status;
2176 }
2177
2178 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2179                 const struct qstr *name, struct nfs_fh *fhandle,
2180                 struct nfs_fattr *fattr)
2181 {
2182         int                    status;
2183         struct nfs4_lookup_arg args = {
2184                 .bitmask = server->attr_bitmask,
2185                 .dir_fh = dirfh,
2186                 .name = name,
2187         };
2188         struct nfs4_lookup_res res = {
2189                 .server = server,
2190                 .fattr = fattr,
2191                 .fh = fhandle,
2192         };
2193         struct rpc_message msg = {
2194                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2195                 .rpc_argp = &args,
2196                 .rpc_resp = &res,
2197         };
2198
2199         nfs_fattr_init(fattr);
2200
2201         dprintk("NFS call  lookupfh %s\n", name->name);
2202         status = nfs4_call_sync(server, &msg, &args, &res, 0);
2203         dprintk("NFS reply lookupfh: %d\n", status);
2204         return status;
2205 }
2206
2207 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2208                               struct qstr *name, struct nfs_fh *fhandle,
2209                               struct nfs_fattr *fattr)
2210 {
2211         struct nfs4_exception exception = { };
2212         int err;
2213         do {
2214                 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2215                 /* FIXME: !!!! */
2216                 if (err == -NFS4ERR_MOVED) {
2217                         err = -EREMOTE;
2218                         break;
2219                 }
2220                 err = nfs4_handle_exception(server, err, &exception);
2221         } while (exception.retry);
2222         return err;
2223 }
2224
2225 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2226                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2227 {
2228         int status;
2229         
2230         dprintk("NFS call  lookup %s\n", name->name);
2231         status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2232         if (status == -NFS4ERR_MOVED)
2233                 status = nfs4_get_referral(dir, name, fattr, fhandle);
2234         dprintk("NFS reply lookup: %d\n", status);
2235         return status;
2236 }
2237
2238 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2239 {
2240         struct nfs4_exception exception = { };
2241         int err;
2242         do {
2243                 err = nfs4_handle_exception(NFS_SERVER(dir),
2244                                 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2245                                 &exception);
2246         } while (exception.retry);
2247         return err;
2248 }
2249
2250 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2251 {
2252         struct nfs_server *server = NFS_SERVER(inode);
2253         struct nfs_fattr fattr;
2254         struct nfs4_accessargs args = {
2255                 .fh = NFS_FH(inode),
2256                 .bitmask = server->attr_bitmask,
2257         };
2258         struct nfs4_accessres res = {
2259                 .server = server,
2260                 .fattr = &fattr,
2261         };
2262         struct rpc_message msg = {
2263                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2264                 .rpc_argp = &args,
2265                 .rpc_resp = &res,
2266                 .rpc_cred = entry->cred,
2267         };
2268         int mode = entry->mask;
2269         int status;
2270
2271         /*
2272          * Determine which access bits we want to ask for...
2273          */
2274         if (mode & MAY_READ)
2275                 args.access |= NFS4_ACCESS_READ;
2276         if (S_ISDIR(inode->i_mode)) {
2277                 if (mode & MAY_WRITE)
2278                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2279                 if (mode & MAY_EXEC)
2280                         args.access |= NFS4_ACCESS_LOOKUP;
2281         } else {
2282                 if (mode & MAY_WRITE)
2283                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2284                 if (mode & MAY_EXEC)
2285                         args.access |= NFS4_ACCESS_EXECUTE;
2286         }
2287         nfs_fattr_init(&fattr);
2288         status = nfs4_call_sync(server, &msg, &args, &res, 0);
2289         if (!status) {
2290                 entry->mask = 0;
2291                 if (res.access & NFS4_ACCESS_READ)
2292                         entry->mask |= MAY_READ;
2293                 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2294                         entry->mask |= MAY_WRITE;
2295                 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2296                         entry->mask |= MAY_EXEC;
2297                 nfs_refresh_inode(inode, &fattr);
2298         }
2299         return status;
2300 }
2301
2302 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2303 {
2304         struct nfs4_exception exception = { };
2305         int err;
2306         do {
2307                 err = nfs4_handle_exception(NFS_SERVER(inode),
2308                                 _nfs4_proc_access(inode, entry),
2309                                 &exception);
2310         } while (exception.retry);
2311         return err;
2312 }
2313
2314 /*
2315  * TODO: For the time being, we don't try to get any attributes
2316  * along with any of the zero-copy operations READ, READDIR,
2317  * READLINK, WRITE.
2318  *
2319  * In the case of the first three, we want to put the GETATTR
2320  * after the read-type operation -- this is because it is hard
2321  * to predict the length of a GETATTR response in v4, and thus
2322  * align the READ data correctly.  This means that the GETATTR
2323  * may end up partially falling into the page cache, and we should
2324  * shift it into the 'tail' of the xdr_buf before processing.
2325  * To do this efficiently, we need to know the total length
2326  * of data received, which doesn't seem to be available outside
2327  * of the RPC layer.
2328  *
2329  * In the case of WRITE, we also want to put the GETATTR after
2330  * the operation -- in this case because we want to make sure
2331  * we get the post-operation mtime and size.  This means that
2332  * we can't use xdr_encode_pages() as written: we need a variant
2333  * of it which would leave room in the 'tail' iovec.
2334  *
2335  * Both of these changes to the XDR layer would in fact be quite
2336  * minor, but I decided to leave them for a subsequent patch.
2337  */
2338 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2339                 unsigned int pgbase, unsigned int pglen)
2340 {
2341         struct nfs4_readlink args = {
2342                 .fh       = NFS_FH(inode),
2343                 .pgbase   = pgbase,
2344                 .pglen    = pglen,
2345                 .pages    = &page,
2346         };
2347         struct nfs4_readlink_res res;
2348         struct rpc_message msg = {
2349                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2350                 .rpc_argp = &args,
2351                 .rpc_resp = &res,
2352         };
2353
2354         return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2355 }
2356
2357 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2358                 unsigned int pgbase, unsigned int pglen)
2359 {
2360         struct nfs4_exception exception = { };
2361         int err;
2362         do {
2363                 err = nfs4_handle_exception(NFS_SERVER(inode),
2364                                 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2365                                 &exception);
2366         } while (exception.retry);
2367         return err;
2368 }
2369
2370 /*
2371  * Got race?
2372  * We will need to arrange for the VFS layer to provide an atomic open.
2373  * Until then, this create/open method is prone to inefficiency and race
2374  * conditions due to the lookup, create, and open VFS calls from sys_open()
2375  * placed on the wire.
2376  *
2377  * Given the above sorry state of affairs, I'm simply sending an OPEN.
2378  * The file will be opened again in the subsequent VFS open call
2379  * (nfs4_proc_file_open).
2380  *
2381  * The open for read will just hang around to be used by any process that
2382  * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2383  */
2384
2385 static int
2386 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2387                  int flags, struct nameidata *nd)
2388 {
2389         struct path path = {
2390                 .mnt = nd->path.mnt,
2391                 .dentry = dentry,
2392         };
2393         struct nfs4_state *state;
2394         struct rpc_cred *cred;
2395         fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2396         int status = 0;
2397
2398         cred = rpc_lookup_cred();
2399         if (IS_ERR(cred)) {
2400                 status = PTR_ERR(cred);
2401                 goto out;
2402         }
2403         state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2404         d_drop(dentry);
2405         if (IS_ERR(state)) {
2406                 status = PTR_ERR(state);
2407                 goto out_putcred;
2408         }
2409         d_add(dentry, igrab(state->inode));
2410         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2411         if (flags & O_EXCL) {
2412                 struct nfs_fattr fattr;
2413                 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2414                 if (status == 0)
2415                         nfs_setattr_update_inode(state->inode, sattr);
2416                 nfs_post_op_update_inode(state->inode, &fattr);
2417         }
2418         if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2419                 status = nfs4_intent_set_file(nd, &path, state, fmode);
2420         else
2421                 nfs4_close_sync(&path, state, fmode);
2422 out_putcred:
2423         put_rpccred(cred);
2424 out:
2425         return status;
2426 }
2427
2428 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2429 {
2430         struct nfs_server *server = NFS_SERVER(dir);
2431         struct nfs_removeargs args = {
2432                 .fh = NFS_FH(dir),
2433                 .name.len = name->len,
2434                 .name.name = name->name,
2435                 .bitmask = server->attr_bitmask,
2436         };
2437         struct nfs_removeres res = {
2438                 .server = server,
2439         };
2440         struct rpc_message msg = {
2441                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2442                 .rpc_argp = &args,
2443                 .rpc_resp = &res,
2444         };
2445         int                     status;
2446
2447         nfs_fattr_init(&res.dir_attr);
2448         status = nfs4_call_sync(server, &msg, &args, &res, 1);
2449         if (status == 0) {
2450                 update_changeattr(dir, &res.cinfo);
2451                 nfs_post_op_update_inode(dir, &res.dir_attr);
2452         }
2453         return status;
2454 }
2455
2456 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2457 {
2458         struct nfs4_exception exception = { };
2459         int err;
2460         do {
2461                 err = nfs4_handle_exception(NFS_SERVER(dir),
2462                                 _nfs4_proc_remove(dir, name),
2463                                 &exception);
2464         } while (exception.retry);
2465         return err;
2466 }
2467
2468 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2469 {
2470         struct nfs_server *server = NFS_SERVER(dir);
2471         struct nfs_removeargs *args = msg->rpc_argp;
2472         struct nfs_removeres *res = msg->rpc_resp;
2473
2474         args->bitmask = server->cache_consistency_bitmask;
2475         res->server = server;
2476         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2477 }
2478
2479 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2480 {
2481         struct nfs_removeres *res = task->tk_msg.rpc_resp;
2482
2483         nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2484         if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2485                 return 0;
2486         nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2487         update_changeattr(dir, &res->cinfo);
2488         nfs_post_op_update_inode(dir, &res->dir_attr);
2489         return 1;
2490 }
2491
2492 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2493                 struct inode *new_dir, struct qstr *new_name)
2494 {
2495         struct nfs_server *server = NFS_SERVER(old_dir);
2496         struct nfs4_rename_arg arg = {
2497                 .old_dir = NFS_FH(old_dir),
2498                 .new_dir = NFS_FH(new_dir),
2499                 .old_name = old_name,
2500                 .new_name = new_name,
2501                 .bitmask = server->attr_bitmask,
2502         };
2503         struct nfs_fattr old_fattr, new_fattr;
2504         struct nfs4_rename_res res = {
2505                 .server = server,
2506                 .old_fattr = &old_fattr,
2507                 .new_fattr = &new_fattr,
2508         };
2509         struct rpc_message msg = {
2510                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2511                 .rpc_argp = &arg,
2512                 .rpc_resp = &res,
2513         };
2514         int                     status;
2515         
2516         nfs_fattr_init(res.old_fattr);
2517         nfs_fattr_init(res.new_fattr);
2518         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2519
2520         if (!status) {
2521                 update_changeattr(old_dir, &res.old_cinfo);
2522                 nfs_post_op_update_inode(old_dir, res.old_fattr);
2523                 update_changeattr(new_dir, &res.new_cinfo);
2524                 nfs_post_op_update_inode(new_dir, res.new_fattr);
2525         }
2526         return status;
2527 }
2528
2529 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2530                 struct inode *new_dir, struct qstr *new_name)
2531 {
2532         struct nfs4_exception exception = { };
2533         int err;
2534         do {
2535                 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2536                                 _nfs4_proc_rename(old_dir, old_name,
2537                                         new_dir, new_name),
2538                                 &exception);
2539         } while (exception.retry);
2540         return err;
2541 }
2542
2543 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2544 {
2545         struct nfs_server *server = NFS_SERVER(inode);
2546         struct nfs4_link_arg arg = {
2547                 .fh     = NFS_FH(inode),
2548                 .dir_fh = NFS_FH(dir),
2549                 .name   = name,
2550                 .bitmask = server->attr_bitmask,
2551         };
2552         struct nfs_fattr fattr, dir_attr;
2553         struct nfs4_link_res res = {
2554                 .server = server,
2555                 .fattr = &fattr,
2556                 .dir_attr = &dir_attr,
2557         };
2558         struct rpc_message msg = {
2559                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2560                 .rpc_argp = &arg,
2561                 .rpc_resp = &res,
2562         };
2563         int                     status;
2564
2565         nfs_fattr_init(res.fattr);
2566         nfs_fattr_init(res.dir_attr);
2567         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2568         if (!status) {
2569                 update_changeattr(dir, &res.cinfo);
2570                 nfs_post_op_update_inode(dir, res.dir_attr);
2571                 nfs_post_op_update_inode(inode, res.fattr);
2572         }
2573
2574         return status;
2575 }
2576
2577 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2578 {
2579         struct nfs4_exception exception = { };
2580         int err;
2581         do {
2582                 err = nfs4_handle_exception(NFS_SERVER(inode),
2583                                 _nfs4_proc_link(inode, dir, name),
2584                                 &exception);
2585         } while (exception.retry);
2586         return err;
2587 }
2588
2589 struct nfs4_createdata {
2590         struct rpc_message msg;
2591         struct nfs4_create_arg arg;
2592         struct nfs4_create_res res;
2593         struct nfs_fh fh;
2594         struct nfs_fattr fattr;
2595         struct nfs_fattr dir_fattr;
2596 };
2597
2598 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2599                 struct qstr *name, struct iattr *sattr, u32 ftype)
2600 {
2601         struct nfs4_createdata *data;
2602
2603         data = kzalloc(sizeof(*data), GFP_KERNEL);
2604         if (data != NULL) {
2605                 struct nfs_server *server = NFS_SERVER(dir);
2606
2607                 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2608                 data->msg.rpc_argp = &data->arg;
2609                 data->msg.rpc_resp = &data->res;
2610                 data->arg.dir_fh = NFS_FH(dir);
2611                 data->arg.server = server;
2612                 data->arg.name = name;
2613                 data->arg.attrs = sattr;
2614                 data->arg.ftype = ftype;
2615                 data->arg.bitmask = server->attr_bitmask;
2616                 data->res.server = server;
2617                 data->res.fh = &data->fh;
2618                 data->res.fattr = &data->fattr;
2619                 data->res.dir_fattr = &data->dir_fattr;
2620                 nfs_fattr_init(data->res.fattr);
2621                 nfs_fattr_init(data->res.dir_fattr);
2622         }
2623         return data;
2624 }
2625
2626 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2627 {
2628         int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2629                                     &data->arg, &data->res, 1);
2630         if (status == 0) {
2631                 update_changeattr(dir, &data->res.dir_cinfo);
2632                 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2633                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2634         }
2635         return status;
2636 }
2637
2638 static void nfs4_free_createdata(struct nfs4_createdata *data)
2639 {
2640         kfree(data);
2641 }
2642
2643 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2644                 struct page *page, unsigned int len, struct iattr *sattr)
2645 {
2646         struct nfs4_createdata *data;
2647         int status = -ENAMETOOLONG;
2648
2649         if (len > NFS4_MAXPATHLEN)
2650                 goto out;
2651
2652         status = -ENOMEM;
2653         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2654         if (data == NULL)
2655                 goto out;
2656
2657         data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2658         data->arg.u.symlink.pages = &page;
2659         data->arg.u.symlink.len = len;
2660         
2661         status = nfs4_do_create(dir, dentry, data);
2662
2663         nfs4_free_createdata(data);
2664 out:
2665         return status;
2666 }
2667
2668 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2669                 struct page *page, unsigned int len, struct iattr *sattr)
2670 {
2671         struct nfs4_exception exception = { };
2672         int err;
2673         do {
2674                 err = nfs4_handle_exception(NFS_SERVER(dir),
2675                                 _nfs4_proc_symlink(dir, dentry, page,
2676                                                         len, sattr),
2677                                 &exception);
2678         } while (exception.retry);
2679         return err;
2680 }
2681
2682 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2683                 struct iattr *sattr)
2684 {
2685         struct nfs4_createdata *data;
2686         int status = -ENOMEM;
2687
2688         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2689         if (data == NULL)
2690                 goto out;
2691
2692         status = nfs4_do_create(dir, dentry, data);
2693
2694         nfs4_free_createdata(data);
2695 out:
2696         return status;
2697 }
2698
2699 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2700                 struct iattr *sattr)
2701 {
2702         struct nfs4_exception exception = { };
2703         int err;
2704         do {
2705                 err = nfs4_handle_exception(NFS_SERVER(dir),
2706                                 _nfs4_proc_mkdir(dir, dentry, sattr),
2707                                 &exception);
2708         } while (exception.retry);
2709         return err;
2710 }
2711
2712 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2713                   u64 cookie, struct page *page, unsigned int count, int plus)
2714 {
2715         struct inode            *dir = dentry->d_inode;
2716         struct nfs4_readdir_arg args = {
2717                 .fh = NFS_FH(dir),
2718                 .pages = &page,
2719                 .pgbase = 0,
2720                 .count = count,
2721                 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2722         };
2723         struct nfs4_readdir_res res;
2724         struct rpc_message msg = {
2725                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2726                 .rpc_argp = &args,
2727                 .rpc_resp = &res,
2728                 .rpc_cred = cred,
2729         };
2730         int                     status;
2731
2732         dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2733                         dentry->d_parent->d_name.name,
2734                         dentry->d_name.name,
2735                         (unsigned long long)cookie);
2736         nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2737         res.pgbase = args.pgbase;
2738         status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2739         if (status == 0)
2740                 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2741
2742         nfs_invalidate_atime(dir);
2743
2744         dprintk("%s: returns %d\n", __func__, status);
2745         return status;
2746 }
2747
2748 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2749                   u64 cookie, struct page *page, unsigned int count, int plus)
2750 {
2751         struct nfs4_exception exception = { };
2752         int err;
2753         do {
2754                 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2755                                 _nfs4_proc_readdir(dentry, cred, cookie,
2756                                         page, count, plus),
2757                                 &exception);
2758         } while (exception.retry);
2759         return err;
2760 }
2761
2762 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2763                 struct iattr *sattr, dev_t rdev)
2764 {
2765         struct nfs4_createdata *data;
2766         int mode = sattr->ia_mode;
2767         int status = -ENOMEM;
2768
2769         BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2770         BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2771
2772         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2773         if (data == NULL)
2774                 goto out;
2775
2776         if (S_ISFIFO(mode))
2777                 data->arg.ftype = NF4FIFO;
2778         else if (S_ISBLK(mode)) {
2779                 data->arg.ftype = NF4BLK;
2780                 data->arg.u.device.specdata1 = MAJOR(rdev);
2781                 data->arg.u.device.specdata2 = MINOR(rdev);
2782         }
2783         else if (S_ISCHR(mode)) {
2784                 data->arg.ftype = NF4CHR;
2785                 data->arg.u.device.specdata1 = MAJOR(rdev);
2786                 data->arg.u.device.specdata2 = MINOR(rdev);
2787         }
2788         
2789         status = nfs4_do_create(dir, dentry, data);
2790
2791         nfs4_free_createdata(data);
2792 out:
2793         return status;
2794 }
2795
2796 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2797                 struct iattr *sattr, dev_t rdev)
2798 {
2799         struct nfs4_exception exception = { };
2800         int err;
2801         do {
2802                 err = nfs4_handle_exception(NFS_SERVER(dir),
2803                                 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2804                                 &exception);
2805         } while (exception.retry);
2806         return err;
2807 }
2808
2809 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2810                  struct nfs_fsstat *fsstat)
2811 {
2812         struct nfs4_statfs_arg args = {
2813                 .fh = fhandle,
2814                 .bitmask = server->attr_bitmask,
2815         };
2816         struct nfs4_statfs_res res = {
2817                 .fsstat = fsstat,
2818         };
2819         struct rpc_message msg = {
2820                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2821                 .rpc_argp = &args,
2822                 .rpc_resp = &res,
2823         };
2824
2825         nfs_fattr_init(fsstat->fattr);
2826         return  nfs4_call_sync(server, &msg, &args, &res, 0);
2827 }
2828
2829 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2830 {
2831         struct nfs4_exception exception = { };
2832         int err;
2833         do {
2834                 err = nfs4_handle_exception(server,
2835                                 _nfs4_proc_statfs(server, fhandle, fsstat),
2836                                 &exception);
2837         } while (exception.retry);
2838         return err;
2839 }
2840
2841 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2842                 struct nfs_fsinfo *fsinfo)
2843 {
2844         struct nfs4_fsinfo_arg args = {
2845                 .fh = fhandle,
2846                 .bitmask = server->attr_bitmask,
2847         };
2848         struct nfs4_fsinfo_res res = {
2849                 .fsinfo = fsinfo,
2850         };
2851         struct rpc_message msg = {
2852                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2853                 .rpc_argp = &args,
2854                 .rpc_resp = &res,
2855         };
2856
2857         return nfs4_call_sync(server, &msg, &args, &res, 0);
2858 }
2859
2860 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2861 {
2862         struct nfs4_exception exception = { };
2863         int err;
2864
2865         do {
2866                 err = nfs4_handle_exception(server,
2867                                 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2868                                 &exception);
2869         } while (exception.retry);
2870         return err;
2871 }
2872
2873 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2874 {
2875         nfs_fattr_init(fsinfo->fattr);
2876         return nfs4_do_fsinfo(server, fhandle, fsinfo);
2877 }
2878
2879 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2880                 struct nfs_pathconf *pathconf)
2881 {
2882         struct nfs4_pathconf_arg args = {
2883                 .fh = fhandle,
2884                 .bitmask = server->attr_bitmask,
2885         };
2886         struct nfs4_pathconf_res res = {
2887                 .pathconf = pathconf,
2888         };
2889         struct rpc_message msg = {
2890                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2891                 .rpc_argp = &args,
2892                 .rpc_resp = &res,
2893         };
2894
2895         /* None of the pathconf attributes are mandatory to implement */
2896         if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2897                 memset(pathconf, 0, sizeof(*pathconf));
2898                 return 0;
2899         }
2900
2901         nfs_fattr_init(pathconf->fattr);
2902         return nfs4_call_sync(server, &msg, &args, &res, 0);
2903 }
2904
2905 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2906                 struct nfs_pathconf *pathconf)
2907 {
2908         struct nfs4_exception exception = { };
2909         int err;
2910
2911         do {
2912                 err = nfs4_handle_exception(server,
2913                                 _nfs4_proc_pathconf(server, fhandle, pathconf),
2914                                 &exception);
2915         } while (exception.retry);
2916         return err;
2917 }
2918
2919 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2920 {
2921         struct nfs_server *server = NFS_SERVER(data->inode);
2922
2923         dprintk("--> %s\n", __func__);
2924
2925         /* nfs4_sequence_free_slot called in the read rpc_call_done */
2926         nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2927
2928         if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2929                 nfs4_restart_rpc(task, server->nfs_client);
2930                 return -EAGAIN;
2931         }
2932
2933         nfs_invalidate_atime(data->inode);
2934         if (task->tk_status > 0)
2935                 renew_lease(server, data->timestamp);
2936         return 0;
2937 }
2938
2939 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2940 {
2941         data->timestamp   = jiffies;
2942         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2943 }
2944
2945 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2946 {
2947         struct inode *inode = data->inode;
2948         
2949         /* slot is freed in nfs_writeback_done */
2950         nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2951                            task->tk_status);
2952
2953         if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2954                 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2955                 return -EAGAIN;
2956         }
2957         if (task->tk_status >= 0) {
2958                 renew_lease(NFS_SERVER(inode), data->timestamp);
2959                 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2960         }
2961         return 0;
2962 }
2963
2964 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2965 {
2966         struct nfs_server *server = NFS_SERVER(data->inode);
2967
2968         data->args.bitmask = server->cache_consistency_bitmask;
2969         data->res.server = server;
2970         data->timestamp   = jiffies;
2971
2972         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2973 }
2974
2975 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2976 {
2977         struct inode *inode = data->inode;
2978         
2979         nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2980                            task->tk_status);
2981         if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2982                 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2983                 return -EAGAIN;
2984         }
2985         nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2986                                 &data->res.seq_res);
2987         nfs_refresh_inode(inode, data->res.fattr);
2988         return 0;
2989 }
2990
2991 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2992 {
2993         struct nfs_server *server = NFS_SERVER(data->inode);
2994         
2995         data->args.bitmask = server->cache_consistency_bitmask;
2996         data->res.server = server;
2997         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2998 }
2999
3000 /*
3001  * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3002  * standalone procedure for queueing an asynchronous RENEW.
3003  */
3004 static void nfs4_renew_done(struct rpc_task *task, void *data)
3005 {
3006         struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3007         unsigned long timestamp = (unsigned long)data;
3008
3009         if (task->tk_status < 0) {
3010                 /* Unless we're shutting down, schedule state recovery! */
3011                 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3012                         nfs4_schedule_state_recovery(clp);
3013                 return;
3014         }
3015         spin_lock(&clp->cl_lock);
3016         if (time_before(clp->cl_last_renewal,timestamp))
3017                 clp->cl_last_renewal = timestamp;
3018         spin_unlock(&clp->cl_lock);
3019         dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3020                                 task->tk_msg.rpc_cred);
3021         put_rpccred(task->tk_msg.rpc_cred);
3022 }
3023
3024 static const struct rpc_call_ops nfs4_renew_ops = {
3025         .rpc_call_done = nfs4_renew_done,
3026 };
3027
3028 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3029 {
3030         struct rpc_message msg = {
3031                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3032                 .rpc_argp       = clp,
3033                 .rpc_cred       = cred,
3034         };
3035
3036         return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3037                         &nfs4_renew_ops, (void *)jiffies);
3038 }
3039
3040 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3041 {
3042         struct rpc_message msg = {
3043                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3044                 .rpc_argp       = clp,
3045                 .rpc_cred       = cred,
3046         };
3047         unsigned long now = jiffies;
3048         int status;
3049
3050         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3051         if (status < 0)
3052                 return status;
3053         spin_lock(&clp->cl_lock);
3054         if (time_before(clp->cl_last_renewal,now))
3055                 clp->cl_last_renewal = now;
3056         spin_unlock(&clp->cl_lock);
3057         return 0;
3058 }
3059
3060 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3061 {
3062         return (server->caps & NFS_CAP_ACLS)
3063                 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3064                 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3065 }
3066
3067 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3068  * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3069  * the stack.
3070  */
3071 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3072
3073 static void buf_to_pages(const void *buf, size_t buflen,
3074                 struct page **pages, unsigned int *pgbase)
3075 {
3076         const void *p = buf;
3077
3078         *pgbase = offset_in_page(buf);
3079         p -= *pgbase;
3080         while (p < buf + buflen) {
3081                 *(pages++) = virt_to_page(p);
3082                 p += PAGE_CACHE_SIZE;
3083         }
3084 }
3085
3086 struct nfs4_cached_acl {
3087         int cached;
3088         size_t len;
3089         char data[0];
3090 };
3091
3092 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3093 {
3094         struct nfs_inode *nfsi = NFS_I(inode);
3095
3096         spin_lock(&inode->i_lock);
3097         kfree(nfsi->nfs4_acl);
3098         nfsi->nfs4_acl = acl;
3099         spin_unlock(&inode->i_lock);
3100 }
3101
3102 static void nfs4_zap_acl_attr(struct inode *inode)
3103 {
3104         nfs4_set_cached_acl(inode, NULL);
3105 }
3106
3107 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3108 {
3109         struct nfs_inode *nfsi = NFS_I(inode);
3110         struct nfs4_cached_acl *acl;
3111         int ret = -ENOENT;
3112
3113         spin_lock(&inode->i_lock);
3114         acl = nfsi->nfs4_acl;
3115         if (acl == NULL)
3116                 goto out;
3117         if (buf == NULL) /* user is just asking for length */
3118                 goto out_len;
3119         if (acl->cached == 0)
3120                 goto out;
3121         ret = -ERANGE; /* see getxattr(2) man page */
3122         if (acl->len > buflen)
3123                 goto out;
3124         memcpy(buf, acl->data, acl->len);
3125 out_len:
3126         ret = acl->len;
3127 out:
3128         spin_unlock(&inode->i_lock);
3129         return ret;
3130 }
3131
3132 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3133 {
3134         struct nfs4_cached_acl *acl;
3135
3136         if (buf && acl_len <= PAGE_SIZE) {
3137                 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3138                 if (acl == NULL)
3139                         goto out;
3140                 acl->cached = 1;
3141                 memcpy(acl->data, buf, acl_len);
3142         } else {
3143                 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3144                 if (acl == NULL)
3145                         goto out;
3146                 acl->cached = 0;
3147         }
3148         acl->len = acl_len;
3149 out:
3150         nfs4_set_cached_acl(inode, acl);
3151 }
3152
3153 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3154 {
3155         struct page *pages[NFS4ACL_MAXPAGES];
3156         struct nfs_getaclargs args = {
3157                 .fh = NFS_FH(inode),
3158                 .acl_pages = pages,
3159                 .acl_len = buflen,
3160         };
3161         struct nfs_getaclres res = {
3162                 .acl_len = buflen,
3163         };
3164         void *resp_buf;
3165         struct rpc_message msg = {
3166                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3167                 .rpc_argp = &args,
3168                 .rpc_resp = &res,
3169         };
3170         struct page *localpage = NULL;
3171         int ret;
3172
3173         if (buflen < PAGE_SIZE) {
3174                 /* As long as we're doing a round trip to the server anyway,
3175                  * let's be prepared for a page of acl data. */
3176                 localpage = alloc_page(GFP_KERNEL);
3177                 resp_buf = page_address(localpage);
3178                 if (localpage == NULL)
3179                         return -ENOMEM;
3180                 args.acl_pages[0] = localpage;
3181                 args.acl_pgbase = 0;
3182                 args.acl_len = PAGE_SIZE;
3183         } else {
3184                 resp_buf = buf;
3185                 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3186         }
3187         ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3188         if (ret)
3189                 goto out_free;
3190         if (res.acl_len > args.acl_len)
3191                 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3192         else
3193                 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3194         if (buf) {
3195                 ret = -ERANGE;
3196                 if (res.acl_len > buflen)
3197                         goto out_free;
3198                 if (localpage)
3199                         memcpy(buf, resp_buf, res.acl_len);
3200         }
3201         ret = res.acl_len;
3202 out_free:
3203         if (localpage)
3204                 __free_page(localpage);
3205         return ret;
3206 }
3207
3208 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3209 {
3210         struct nfs4_exception exception = { };
3211         ssize_t ret;
3212         do {
3213                 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3214                 if (ret >= 0)
3215                         break;
3216                 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3217         } while (exception.retry);
3218         return ret;
3219 }
3220
3221 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3222 {
3223         struct nfs_server *server = NFS_SERVER(inode);
3224         int ret;
3225
3226         if (!nfs4_server_supports_acls(server))
3227                 return -EOPNOTSUPP;
3228         ret = nfs_revalidate_inode(server, inode);
3229         if (ret < 0)
3230                 return ret;
3231         if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3232                 nfs_zap_acl_cache(inode);
3233         ret = nfs4_read_cached_acl(inode, buf, buflen);
3234         if (ret != -ENOENT)
3235                 return ret;
3236         return nfs4_get_acl_uncached(inode, buf, buflen);
3237 }
3238
3239 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3240 {
3241         struct nfs_server *server = NFS_SERVER(inode);
3242         struct page *pages[NFS4ACL_MAXPAGES];
3243         struct nfs_setaclargs arg = {
3244                 .fh             = NFS_FH(inode),
3245                 .acl_pages      = pages,
3246                 .acl_len        = buflen,
3247         };
3248         struct nfs_setaclres res;
3249         struct rpc_message msg = {
3250                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3251                 .rpc_argp       = &arg,
3252                 .rpc_resp       = &res,
3253         };
3254         int ret;
3255
3256         if (!nfs4_server_supports_acls(server))
3257                 return -EOPNOTSUPP;
3258         nfs_inode_return_delegation(inode);
3259         buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3260         ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3261         nfs_access_zap_cache(inode);
3262         nfs_zap_acl_cache(inode);
3263         return ret;
3264 }
3265
3266 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3267 {
3268         struct nfs4_exception exception = { };
3269         int err;
3270         do {
3271                 err = nfs4_handle_exception(NFS_SERVER(inode),
3272                                 __nfs4_proc_set_acl(inode, buf, buflen),
3273                                 &exception);
3274         } while (exception.retry);
3275         return err;
3276 }
3277
3278 static int
3279 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3280 {
3281         if (!clp || task->tk_status >= 0)
3282                 return 0;
3283         switch(task->tk_status) {
3284                 case -NFS4ERR_ADMIN_REVOKED:
3285                 case -NFS4ERR_BAD_STATEID:
3286                 case -NFS4ERR_OPENMODE:
3287                         if (state == NULL)
3288                                 break;
3289                         nfs4_state_mark_reclaim_nograce(clp, state);
3290                 case -NFS4ERR_STALE_CLIENTID:
3291                 case -NFS4ERR_STALE_STATEID:
3292                 case -NFS4ERR_EXPIRED:
3293                         rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3294                         nfs4_schedule_state_recovery(clp);
3295                         if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3296                                 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3297                         task->tk_status = 0;
3298                         return -EAGAIN;
3299 #if defined(CONFIG_NFS_V4_1)
3300                 case -NFS4ERR_BADSESSION:
3301                 case -NFS4ERR_BADSLOT:
3302                 case -NFS4ERR_BAD_HIGH_SLOT:
3303                 case -NFS4ERR_DEADSESSION:
3304                 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3305                 case -NFS4ERR_SEQ_FALSE_RETRY:
3306                 case -NFS4ERR_SEQ_MISORDERED:
3307                         dprintk("%s ERROR %d, Reset session\n", __func__,
3308                                 task->tk_status);
3309                         set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3310                         task->tk_status = 0;
3311                         return -EAGAIN;
3312 #endif /* CONFIG_NFS_V4_1 */
3313                 case -NFS4ERR_DELAY:
3314                         if (server)
3315                                 nfs_inc_server_stats(server, NFSIOS_DELAY);
3316                 case -NFS4ERR_GRACE:
3317                         rpc_delay(task, NFS4_POLL_RETRY_MAX);
3318                         task->tk_status = 0;
3319                         return -EAGAIN;
3320                 case -NFS4ERR_OLD_STATEID:
3321                         task->tk_status = 0;
3322                         return -EAGAIN;
3323         }
3324         task->tk_status = nfs4_map_errors(task->tk_status);
3325         return 0;
3326 }
3327
3328 static int
3329 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3330 {
3331         return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3332 }
3333
3334 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3335 {
3336         nfs4_verifier sc_verifier;
3337         struct nfs4_setclientid setclientid = {
3338                 .sc_verifier = &sc_verifier,
3339                 .sc_prog = program,
3340         };
3341         struct rpc_message msg = {
3342                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3343                 .rpc_argp = &setclientid,
3344                 .rpc_resp = clp,
3345                 .rpc_cred = cred,
3346         };
3347         __be32 *p;
3348         int loop = 0;
3349         int status;
3350
3351         p = (__be32*)sc_verifier.data;
3352         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3353         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3354
3355         for(;;) {
3356                 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3357                                 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3358                                 clp->cl_ipaddr,
3359                                 rpc_peeraddr2str(clp->cl_rpcclient,
3360                                                         RPC_DISPLAY_ADDR),
3361                                 rpc_peeraddr2str(clp->cl_rpcclient,
3362                                                         RPC_DISPLAY_PROTO),
3363                                 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3364                                 clp->cl_id_uniquifier);
3365                 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3366                                 sizeof(setclientid.sc_netid),
3367                                 rpc_peeraddr2str(clp->cl_rpcclient,
3368                                                         RPC_DISPLAY_NETID));
3369                 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3370                                 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3371                                 clp->cl_ipaddr, port >> 8, port & 255);
3372
3373                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3374                 if (status != -NFS4ERR_CLID_INUSE)
3375                         break;
3376                 if (signalled())
3377                         break;
3378                 if (loop++ & 1)
3379                         ssleep(clp->cl_lease_time + 1);
3380                 else
3381                         if (++clp->cl_id_uniquifier == 0)
3382                                 break;
3383         }
3384         return status;
3385 }
3386
3387 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3388 {
3389         struct nfs_fsinfo fsinfo;
3390         struct rpc_message msg = {
3391                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3392                 .rpc_argp = clp,
3393                 .rpc_resp = &fsinfo,
3394                 .rpc_cred = cred,
3395         };
3396         unsigned long now;
3397         int status;
3398
3399         now = jiffies;
3400         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3401         if (status == 0) {
3402                 spin_lock(&clp->cl_lock);
3403                 clp->cl_lease_time = fsinfo.lease_time * HZ;
3404                 clp->cl_last_renewal = now;
3405                 spin_unlock(&clp->cl_lock);
3406         }
3407         return status;
3408 }
3409
3410 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3411 {
3412         long timeout = 0;
3413         int err;
3414         do {
3415                 err = _nfs4_proc_setclientid_confirm(clp, cred);
3416                 switch (err) {
3417                         case 0:
3418                                 return err;
3419                         case -NFS4ERR_RESOURCE:
3420                                 /* The IBM lawyers misread another document! */
3421                         case -NFS4ERR_DELAY:
3422                                 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3423                 }
3424         } while (err == 0);
3425         return err;
3426 }
3427
3428 struct nfs4_delegreturndata {
3429         struct nfs4_delegreturnargs args;
3430         struct nfs4_delegreturnres res;
3431         struct nfs_fh fh;
3432         nfs4_stateid stateid;
3433         unsigned long timestamp;
3434         struct nfs_fattr fattr;
3435         int rpc_status;
3436 };
3437
3438 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3439 {
3440         struct nfs4_delegreturndata *data = calldata;
3441
3442         nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3443                                      task->tk_status);
3444
3445         data->rpc_status = task->tk_status;
3446         if (data->rpc_status == 0)
3447                 renew_lease(data->res.server, data->timestamp);
3448 }
3449
3450 static void nfs4_delegreturn_release(void *calldata)
3451 {
3452         kfree(calldata);
3453 }
3454
3455 #if defined(CONFIG_NFS_V4_1)
3456 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3457 {
3458         struct nfs4_delegreturndata *d_data;
3459
3460         d_data = (struct nfs4_delegreturndata *)data;
3461
3462         if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3463                                 &d_data->args.seq_args,
3464                                 &d_data->res.seq_res, 1, task))
3465                 return;
3466         rpc_call_start(task);
3467 }
3468 #endif /* CONFIG_NFS_V4_1 */
3469
3470 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3471 #if defined(CONFIG_NFS_V4_1)
3472         .rpc_call_prepare = nfs4_delegreturn_prepare,
3473 #endif /* CONFIG_NFS_V4_1 */
3474         .rpc_call_done = nfs4_delegreturn_done,
3475         .rpc_release = nfs4_delegreturn_release,
3476 };
3477
3478 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3479 {
3480         struct nfs4_delegreturndata *data;
3481         struct nfs_server *server = NFS_SERVER(inode);
3482         struct rpc_task *task;
3483         struct rpc_message msg = {
3484                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3485                 .rpc_cred = cred,
3486         };
3487         struct rpc_task_setup task_setup_data = {
3488                 .rpc_client = server->client,
3489                 .rpc_message = &msg,
3490                 .callback_ops = &nfs4_delegreturn_ops,
3491                 .flags = RPC_TASK_ASYNC,
3492         };
3493         int status = 0;
3494
3495         data = kzalloc(sizeof(*data), GFP_KERNEL);
3496         if (data == NULL)
3497                 return -ENOMEM;
3498         data->args.fhandle = &data->fh;
3499         data->args.stateid = &data->stateid;
3500         data->args.bitmask = server->attr_bitmask;
3501         nfs_copy_fh(&data->fh, NFS_FH(inode));
3502         memcpy(&data->stateid, stateid, sizeof(data->stateid));
3503         data->res.fattr = &data->fattr;
3504         data->res.server = server;
3505         data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3506         nfs_fattr_init(data->res.fattr);
3507         data->timestamp = jiffies;
3508         data->rpc_status = 0;
3509
3510         task_setup_data.callback_data = data;
3511         msg.rpc_argp = &data->args,
3512         msg.rpc_resp = &data->res,
3513         task = rpc_run_task(&task_setup_data);
3514         if (IS_ERR(task))
3515                 return PTR_ERR(task);
3516         if (!issync)
3517                 goto out;
3518         status = nfs4_wait_for_completion_rpc_task(task);
3519         if (status != 0)
3520                 goto out;
3521         status = data->rpc_status;
3522         if (status != 0)
3523                 goto out;
3524         nfs_refresh_inode(inode, &data->fattr);
3525 out:
3526         rpc_put_task(task);
3527         return status;
3528 }
3529
3530 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3531 {
3532         struct nfs_server *server = NFS_SERVER(inode);
3533         struct nfs4_exception exception = { };
3534         int err;
3535         do {
3536                 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3537                 switch (err) {
3538                         case -NFS4ERR_STALE_STATEID:
3539                         case -NFS4ERR_EXPIRED:
3540                         case 0:
3541                                 return 0;
3542                 }
3543                 err = nfs4_handle_exception(server, err, &exception);
3544         } while (exception.retry);
3545         return err;
3546 }
3547
3548 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3549 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3550
3551 /* 
3552  * sleep, with exponential backoff, and retry the LOCK operation. 
3553  */
3554 static unsigned long
3555 nfs4_set_lock_task_retry(unsigned long timeout)
3556 {
3557         schedule_timeout_killable(timeout);
3558         timeout <<= 1;
3559         if (timeout > NFS4_LOCK_MAXTIMEOUT)
3560                 return NFS4_LOCK_MAXTIMEOUT;
3561         return timeout;
3562 }
3563
3564 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3565 {
3566         struct inode *inode = state->inode;
3567         struct nfs_server *server = NFS_SERVER(inode);
3568         struct nfs_client *clp = server->nfs_client;
3569         struct nfs_lockt_args arg = {
3570                 .fh = NFS_FH(inode),
3571                 .fl = request,
3572         };
3573         struct nfs_lockt_res res = {
3574                 .denied = request,
3575         };
3576         struct rpc_message msg = {
3577                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3578                 .rpc_argp       = &arg,
3579                 .rpc_resp       = &res,
3580                 .rpc_cred       = state->owner->so_cred,
3581         };
3582         struct nfs4_lock_state *lsp;
3583         int status;
3584
3585         arg.lock_owner.clientid = clp->cl_clientid;
3586         status = nfs4_set_lock_state(state, request);
3587         if (status != 0)
3588                 goto out;
3589         lsp = request->fl_u.nfs4_fl.owner;
3590         arg.lock_owner.id = lsp->ls_id.id;
3591         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3592         switch (status) {
3593                 case 0:
3594                         request->fl_type = F_UNLCK;
3595                         break;
3596                 case -NFS4ERR_DENIED:
3597                         status = 0;
3598         }
3599         request->fl_ops->fl_release_private(request);
3600 out:
3601         return status;
3602 }
3603
3604 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3605 {
3606         struct nfs4_exception exception = { };
3607         int err;
3608
3609         do {
3610                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3611                                 _nfs4_proc_getlk(state, cmd, request),
3612                                 &exception);
3613         } while (exception.retry);
3614         return err;
3615 }
3616
3617 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3618 {
3619         int res = 0;
3620         switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3621                 case FL_POSIX:
3622                         res = posix_lock_file_wait(file, fl);
3623                         break;
3624                 case FL_FLOCK:
3625                         res = flock_lock_file_wait(file, fl);
3626                         break;
3627                 default:
3628                         BUG();
3629         }
3630         return res;
3631 }
3632
3633 struct nfs4_unlockdata {
3634         struct nfs_locku_args arg;
3635         struct nfs_locku_res res;
3636         struct nfs4_lock_state *lsp;
3637         struct nfs_open_context *ctx;
3638         struct file_lock fl;
3639         const struct nfs_server *server;
3640         unsigned long timestamp;
3641 };
3642
3643 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3644                 struct nfs_open_context *ctx,
3645                 struct nfs4_lock_state *lsp,
3646                 struct nfs_seqid *seqid)
3647 {
3648         struct nfs4_unlockdata *p;
3649         struct inode *inode = lsp->ls_state->inode;
3650
3651         p = kzalloc(sizeof(*p), GFP_KERNEL);
3652         if (p == NULL)
3653                 return NULL;
3654         p->arg.fh = NFS_FH(inode);
3655         p->arg.fl = &p->fl;
3656         p->arg.seqid = seqid;
3657         p->res.seqid = seqid;
3658         p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3659         p->arg.stateid = &lsp->ls_stateid;
3660         p->lsp = lsp;
3661         atomic_inc(&lsp->ls_count);
3662         /* Ensure we don't close file until we're done freeing locks! */
3663         p->ctx = get_nfs_open_context(ctx);
3664         memcpy(&p->fl, fl, sizeof(p->fl));
3665         p->server = NFS_SERVER(inode);
3666         return p;
3667 }
3668
3669 static void nfs4_locku_release_calldata(void *data)
3670 {
3671         struct nfs4_unlockdata *calldata = data;
3672         nfs_free_seqid(calldata->arg.seqid);
3673         nfs4_put_lock_state(calldata->lsp);
3674         put_nfs_open_context(calldata->ctx);
3675         kfree(calldata);
3676 }
3677
3678 static void nfs4_locku_done(struct rpc_task *task, void *data)
3679 {
3680         struct nfs4_unlockdata *calldata = data;
3681
3682         nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3683                            task->tk_status);
3684         if (RPC_ASSASSINATED(task))
3685                 return;
3686         switch (task->tk_status) {
3687                 case 0:
3688                         memcpy(calldata->lsp->ls_stateid.data,
3689                                         calldata->res.stateid.data,
3690                                         sizeof(calldata->lsp->ls_stateid.data));
3691                         renew_lease(calldata->server, calldata->timestamp);
3692                         break;
3693                 case -NFS4ERR_BAD_STATEID:
3694                 case -NFS4ERR_OLD_STATEID:
3695                 case -NFS4ERR_STALE_STATEID:
3696                 case -NFS4ERR_EXPIRED:
3697                         break;
3698                 default:
3699                         if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3700                                 nfs4_restart_rpc(task,
3701                                                 calldata->server->nfs_client);
3702         }
3703         nfs4_sequence_free_slot(calldata->server->nfs_client,
3704                                 &calldata->res.seq_res);
3705 }
3706
3707 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3708 {
3709         struct nfs4_unlockdata *calldata = data;
3710
3711         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3712                 return;
3713         if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3714                 /* Note: exit _without_ running nfs4_locku_done */
3715                 task->tk_action = NULL;
3716                 return;
3717         }
3718         calldata->timestamp = jiffies;
3719         if (nfs4_setup_sequence(calldata->server->nfs_client,
3720                                 &calldata->arg.seq_args,
3721                                 &calldata->res.seq_res, 1, task))
3722                 return;
3723         rpc_call_start(task);
3724 }
3725
3726 static const struct rpc_call_ops nfs4_locku_ops = {
3727         .rpc_call_prepare = nfs4_locku_prepare,
3728         .rpc_call_done = nfs4_locku_done,
3729         .rpc_release = nfs4_locku_release_calldata,
3730 };
3731
3732 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3733                 struct nfs_open_context *ctx,
3734                 struct nfs4_lock_state *lsp,
3735                 struct nfs_seqid *seqid)
3736 {
3737         struct nfs4_unlockdata *data;
3738         struct rpc_message msg = {
3739                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3740                 .rpc_cred = ctx->cred,
3741         };
3742         struct rpc_task_setup task_setup_data = {
3743                 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3744                 .rpc_message = &msg,
3745                 .callback_ops = &nfs4_locku_ops,
3746                 .workqueue = nfsiod_workqueue,
3747                 .flags = RPC_TASK_ASYNC,
3748         };
3749
3750         /* Ensure this is an unlock - when canceling a lock, the
3751          * canceled lock is passed in, and it won't be an unlock.
3752          */
3753         fl->fl_type = F_UNLCK;
3754
3755         data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3756         if (data == NULL) {
3757                 nfs_free_seqid(seqid);
3758                 return ERR_PTR(-ENOMEM);
3759         }
3760
3761         msg.rpc_argp = &data->arg,
3762         msg.rpc_resp = &data->res,
3763         task_setup_data.callback_data = data;
3764         return rpc_run_task(&task_setup_data);
3765 }
3766
3767 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3768 {
3769         struct nfs_inode *nfsi = NFS_I(state->inode);
3770         struct nfs_seqid *seqid;
3771         struct nfs4_lock_state *lsp;
3772         struct rpc_task *task;
3773         int status = 0;
3774         unsigned char fl_flags = request->fl_flags;
3775
3776         status = nfs4_set_lock_state(state, request);
3777         /* Unlock _before_ we do the RPC call */
3778         request->fl_flags |= FL_EXISTS;
3779         down_read(&nfsi->rwsem);
3780         if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3781                 up_read(&nfsi->rwsem);
3782                 goto out;
3783         }
3784         up_read(&nfsi->rwsem);
3785         if (status != 0)
3786                 goto out;
3787         /* Is this a delegated lock? */
3788         if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3789                 goto out;
3790         lsp = request->fl_u.nfs4_fl.owner;
3791         seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3792         status = -ENOMEM;
3793         if (seqid == NULL)
3794                 goto out;
3795         task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3796         status = PTR_ERR(task);
3797         if (IS_ERR(task))
3798                 goto out;
3799         status = nfs4_wait_for_completion_rpc_task(task);
3800         rpc_put_task(task);
3801 out:
3802         request->fl_flags = fl_flags;
3803         return status;
3804 }
3805
3806 struct nfs4_lockdata {
3807         struct nfs_lock_args arg;
3808         struct nfs_lock_res res;
3809         struct nfs4_lock_state *lsp;
3810         struct nfs_open_context *ctx;
3811         struct file_lock fl;
3812         unsigned long timestamp;
3813         int rpc_status;
3814         int cancelled;
3815         struct nfs_server *server;
3816 };
3817
3818 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3819                 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3820 {
3821         struct nfs4_lockdata *p;
3822         struct inode *inode = lsp->ls_state->inode;
3823         struct nfs_server *server = NFS_SERVER(inode);
3824
3825         p = kzalloc(sizeof(*p), GFP_KERNEL);
3826         if (p == NULL)
3827                 return NULL;
3828
3829         p->arg.fh = NFS_FH(inode);
3830         p->arg.fl = &p->fl;
3831         p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3832         if (p->arg.open_seqid == NULL)
3833                 goto out_free;
3834         p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3835         if (p->arg.lock_seqid == NULL)
3836                 goto out_free_seqid;
3837         p->arg.lock_stateid = &lsp->ls_stateid;
3838         p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3839         p->arg.lock_owner.id = lsp->ls_id.id;
3840         p->res.lock_seqid = p->arg.lock_seqid;
3841         p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3842         p->lsp = lsp;
3843         p->server = server;
3844         atomic_inc(&lsp->ls_count);
3845         p->ctx = get_nfs_open_context(ctx);
3846         memcpy(&p->fl, fl, sizeof(p->fl));
3847         return p;
3848 out_free_seqid:
3849         nfs_free_seqid(p->arg.open_seqid);
3850 out_free:
3851         kfree(p);
3852         return NULL;
3853 }
3854
3855 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3856 {
3857         struct nfs4_lockdata *data = calldata;
3858         struct nfs4_state *state = data->lsp->ls_state;
3859
3860         dprintk("%s: begin!\n", __func__);
3861         if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3862                 return;
3863         /* Do we need to do an open_to_lock_owner? */
3864         if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3865                 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3866                         return;
3867                 data->arg.open_stateid = &state->stateid;
3868                 data->arg.new_lock_owner = 1;
3869                 data->res.open_seqid = data->arg.open_seqid;
3870         } else
3871                 data->arg.new_lock_owner = 0;
3872         data->timestamp = jiffies;
3873         if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3874                                 &data->res.seq_res, 1, task))
3875                 return;
3876         rpc_call_start(task);
3877         dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3878 }
3879
3880 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3881 {
3882         struct nfs4_lockdata *data = calldata;
3883
3884         dprintk("%s: begin!\n", __func__);
3885
3886         nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3887                                      task->tk_status);
3888
3889         data->rpc_status = task->tk_status;
3890         if (RPC_ASSASSINATED(task))
3891                 goto out;
3892         if (data->arg.new_lock_owner != 0) {
3893                 if (data->rpc_status == 0)
3894                         nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3895                 else
3896                         goto out;
3897         }
3898         if (data->rpc_status == 0) {
3899                 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3900                                         sizeof(data->lsp->ls_stateid.data));
3901                 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3902                 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3903         }
3904 out:
3905         dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3906 }
3907
3908 static void nfs4_lock_release(void *calldata)
3909 {
3910         struct nfs4_lockdata *data = calldata;
3911
3912         dprintk("%s: begin!\n", __func__);
3913         nfs_free_seqid(data->arg.open_seqid);
3914         if (data->cancelled != 0) {
3915                 struct rpc_task *task;
3916                 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3917                                 data->arg.lock_seqid);
3918                 if (!IS_ERR(task))
3919                         rpc_put_task(task);
3920                 dprintk("%s: cancelling lock!\n", __func__);
3921         } else
3922                 nfs_free_seqid(data->arg.lock_seqid);
3923         nfs4_put_lock_state(data->lsp);
3924         put_nfs_open_context(data->ctx);
3925         kfree(data);
3926         dprintk("%s: done!\n", __func__);
3927 }
3928
3929 static const struct rpc_call_ops nfs4_lock_ops = {
3930         .rpc_call_prepare = nfs4_lock_prepare,
3931         .rpc_call_done = nfs4_lock_done,
3932         .rpc_release = nfs4_lock_release,
3933 };
3934
3935 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3936 {
3937         struct nfs4_lockdata *data;
3938         struct rpc_task *task;
3939         struct rpc_message msg = {
3940                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3941                 .rpc_cred = state->owner->so_cred,
3942         };
3943         struct rpc_task_setup task_setup_data = {
3944                 .rpc_client = NFS_CLIENT(state->inode),
3945                 .rpc_message = &msg,
3946                 .callback_ops = &nfs4_lock_ops,
3947                 .workqueue = nfsiod_workqueue,
3948                 .flags = RPC_TASK_ASYNC,
3949         };
3950         int ret;
3951
3952         dprintk("%s: begin!\n", __func__);
3953         data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3954                         fl->fl_u.nfs4_fl.owner);
3955         if (data == NULL)
3956                 return -ENOMEM;
3957         if (IS_SETLKW(cmd))
3958                 data->arg.block = 1;
3959         if (reclaim != 0)
3960                 data->arg.reclaim = 1;
3961         msg.rpc_argp = &data->arg,
3962         msg.rpc_resp = &data->res,
3963         task_setup_data.callback_data = data;
3964         task = rpc_run_task(&task_setup_data);
3965         if (IS_ERR(task))
3966                 return PTR_ERR(task);
3967         ret = nfs4_wait_for_completion_rpc_task(task);
3968         if (ret == 0) {
3969                 ret = data->rpc_status;
3970                 if (ret == -NFS4ERR_DENIED)
3971                         ret = -EAGAIN;
3972         } else
3973                 data->cancelled = 1;
3974         rpc_put_task(task);
3975         dprintk("%s: done, ret = %d!\n", __func__, ret);
3976         return ret;
3977 }
3978
3979 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3980 {
3981         struct nfs_server *server = NFS_SERVER(state->inode);
3982         struct nfs4_exception exception = { };
3983         int err;
3984
3985         do {
3986                 /* Cache the lock if possible... */
3987                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3988                         return 0;
3989                 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3990                 if (err != -NFS4ERR_DELAY)
3991                         break;
3992                 nfs4_handle_exception(server, err, &exception);
3993         } while (exception.retry);
3994         return err;
3995 }
3996
3997 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3998 {
3999         struct nfs_server *server = NFS_SERVER(state->inode);
4000         struct nfs4_exception exception = { };
4001         int err;
4002
4003         err = nfs4_set_lock_state(state, request);
4004         if (err != 0)
4005                 return err;
4006         do {
4007                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4008                         return 0;
4009                 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4010                 if (err != -NFS4ERR_DELAY)
4011                         break;
4012                 nfs4_handle_exception(server, err, &exception);
4013         } while (exception.retry);
4014         return err;
4015 }
4016
4017 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4018 {
4019         struct nfs_inode *nfsi = NFS_I(state->inode);
4020         unsigned char fl_flags = request->fl_flags;
4021         int status;
4022
4023         /* Is this a delegated open? */
4024         status = nfs4_set_lock_state(state, request);
4025         if (status != 0)
4026                 goto out;
4027         request->fl_flags |= FL_ACCESS;
4028         status = do_vfs_lock(request->fl_file, request);
4029         if (status < 0)
4030                 goto out;
4031         down_read(&nfsi->rwsem);
4032         if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4033                 /* Yes: cache locks! */
4034                 /* ...but avoid races with delegation recall... */
4035                 request->fl_flags = fl_flags & ~FL_SLEEP;
4036                 status = do_vfs_lock(request->fl_file, request);
4037                 goto out_unlock;
4038         }
4039         status = _nfs4_do_setlk(state, cmd, request, 0);
4040         if (status != 0)
4041                 goto out_unlock;
4042         /* Note: we always want to sleep here! */
4043         request->fl_flags = fl_flags | FL_SLEEP;
4044         if (do_vfs_lock(request->fl_file, request) < 0)
4045                 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4046 out_unlock:
4047         up_read(&nfsi->rwsem);
4048 out:
4049         request->fl_flags = fl_flags;
4050         return status;
4051 }
4052
4053 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4054 {
4055         struct nfs4_exception exception = { };
4056         int err;
4057
4058         do {
4059                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4060                                 _nfs4_proc_setlk(state, cmd, request),
4061                                 &exception);
4062         } while (exception.retry);
4063         return err;
4064 }
4065
4066 static int
4067 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4068 {
4069         struct nfs_open_context *ctx;
4070         struct nfs4_state *state;
4071         unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4072         int status;
4073
4074         /* verify open state */
4075         ctx = nfs_file_open_context(filp);
4076         state = ctx->state;
4077
4078         if (request->fl_start < 0 || request->fl_end < 0)
4079                 return -EINVAL;
4080
4081         if (IS_GETLK(cmd))
4082                 return nfs4_proc_getlk(state, F_GETLK, request);
4083
4084         if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4085                 return -EINVAL;
4086
4087         if (request->fl_type == F_UNLCK)
4088                 return nfs4_proc_unlck(state, cmd, request);
4089
4090         do {
4091                 status = nfs4_proc_setlk(state, cmd, request);
4092                 if ((status != -EAGAIN) || IS_SETLK(cmd))
4093                         break;
4094                 timeout = nfs4_set_lock_task_retry(timeout);
4095                 status = -ERESTARTSYS;
4096                 if (signalled())
4097                         break;
4098         } while(status < 0);
4099         return status;
4100 }
4101
4102 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4103 {
4104         struct nfs_server *server = NFS_SERVER(state->inode);
4105         struct nfs4_exception exception = { };
4106         int err;
4107
4108         err = nfs4_set_lock_state(state, fl);
4109         if (err != 0)
4110                 goto out;
4111         do {
4112                 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4113                 if (err != -NFS4ERR_DELAY)
4114                         break;
4115                 err = nfs4_handle_exception(server, err, &exception);
4116         } while (exception.retry);
4117 out:
4118         return err;
4119 }
4120
4121 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4122
4123 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4124                 size_t buflen, int flags)
4125 {
4126         struct inode *inode = dentry->d_inode;
4127
4128         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4129                 return -EOPNOTSUPP;
4130
4131         return nfs4_proc_set_acl(inode, buf, buflen);
4132 }
4133
4134 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4135  * and that's what we'll do for e.g. user attributes that haven't been set.
4136  * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4137  * attributes in kernel-managed attribute namespaces. */
4138 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4139                 size_t buflen)
4140 {
4141         struct inode *inode = dentry->d_inode;
4142
4143         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4144                 return -EOPNOTSUPP;
4145
4146         return nfs4_proc_get_acl(inode, buf, buflen);
4147 }
4148
4149 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4150 {
4151         size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4152
4153         if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4154                 return 0;
4155         if (buf && buflen < len)
4156                 return -ERANGE;
4157         if (buf)
4158                 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4159         return len;
4160 }
4161
4162 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4163 {
4164         if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4165                 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4166                 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4167                 return;
4168
4169         fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4170                 NFS_ATTR_FATTR_NLINK;
4171         fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4172         fattr->nlink = 2;
4173 }
4174
4175 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4176                 struct nfs4_fs_locations *fs_locations, struct page *page)
4177 {
4178         struct nfs_server *server = NFS_SERVER(dir);
4179         u32 bitmask[2] = {
4180                 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4181                 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4182         };
4183         struct nfs4_fs_locations_arg args = {
4184                 .dir_fh = NFS_FH(dir),
4185                 .name = name,
4186                 .page = page,
4187                 .bitmask = bitmask,
4188         };
4189         struct nfs4_fs_locations_res res = {
4190                 .fs_locations = fs_locations,
4191         };
4192         struct rpc_message msg = {
4193                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4194                 .rpc_argp = &args,
4195                 .rpc_resp = &res,
4196         };
4197         int status;
4198
4199         dprintk("%s: start\n", __func__);
4200         nfs_fattr_init(&fs_locations->fattr);
4201         fs_locations->server = server;
4202         fs_locations->nlocations = 0;
4203         status = nfs4_call_sync(server, &msg, &args, &res, 0);
4204         nfs_fixup_referral_attributes(&fs_locations->fattr);
4205         dprintk("%s: returned status = %d\n", __func__, status);
4206         return status;
4207 }
4208
4209 #ifdef CONFIG_NFS_V4_1
4210 /*
4211  * nfs4_proc_exchange_id()
4212  *
4213  * Since the clientid has expired, all compounds using sessions
4214  * associated with the stale clientid will be returning
4215  * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4216  * be in some phase of session reset.
4217  */
4218 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4219 {
4220         nfs4_verifier verifier;
4221         struct nfs41_exchange_id_args args = {
4222                 .client = clp,
4223                 .flags = clp->cl_exchange_flags,
4224         };
4225         struct nfs41_exchange_id_res res = {
4226                 .client = clp,
4227         };
4228         int status;
4229         struct rpc_message msg = {
4230                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4231                 .rpc_argp = &args,
4232                 .rpc_resp = &res,
4233                 .rpc_cred = cred,
4234         };
4235         __be32 *p;
4236
4237         dprintk("--> %s\n", __func__);
4238         BUG_ON(clp == NULL);
4239
4240         p = (u32 *)verifier.data;
4241         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4242         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4243         args.verifier = &verifier;
4244
4245         while (1) {
4246                 args.id_len = scnprintf(args.id, sizeof(args.id),
4247                                         "%s/%s %u",
4248                                         clp->cl_ipaddr,
4249                                         rpc_peeraddr2str(clp->cl_rpcclient,
4250                                                          RPC_DISPLAY_ADDR),
4251                                         clp->cl_id_uniquifier);
4252
4253                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4254
4255                 if (status != NFS4ERR_CLID_INUSE)
4256                         break;
4257
4258                 if (signalled())
4259                         break;
4260
4261                 if (++clp->cl_id_uniquifier == 0)
4262                         break;
4263         }
4264
4265         dprintk("<-- %s status= %d\n", __func__, status);
4266         return status;
4267 }
4268
4269 struct nfs4_get_lease_time_data {
4270         struct nfs4_get_lease_time_args *args;
4271         struct nfs4_get_lease_time_res *res;
4272         struct nfs_client *clp;
4273 };
4274
4275 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4276                                         void *calldata)
4277 {
4278         int ret;
4279         struct nfs4_get_lease_time_data *data =
4280                         (struct nfs4_get_lease_time_data *)calldata;
4281
4282         dprintk("--> %s\n", __func__);
4283         /* just setup sequence, do not trigger session recovery
4284            since we're invoked within one */
4285         ret = nfs41_setup_sequence(data->clp->cl_session,
4286                                         &data->args->la_seq_args,
4287                                         &data->res->lr_seq_res, 0, task);
4288
4289         BUG_ON(ret == -EAGAIN);
4290         rpc_call_start(task);
4291         dprintk("<-- %s\n", __func__);
4292 }
4293
4294 /*
4295  * Called from nfs4_state_manager thread for session setup, so don't recover
4296  * from sequence operation or clientid errors.
4297  */
4298 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4299 {
4300         struct nfs4_get_lease_time_data *data =
4301                         (struct nfs4_get_lease_time_data *)calldata;
4302
4303         dprintk("--> %s\n", __func__);
4304         nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4305         switch (task->tk_status) {
4306         case -NFS4ERR_DELAY:
4307         case -NFS4ERR_GRACE:
4308                 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4309                 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4310                 task->tk_status = 0;
4311                 nfs4_restart_rpc(task, data->clp);
4312                 return;
4313         }
4314         nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4315         dprintk("<-- %s\n", __func__);
4316 }
4317
4318 struct rpc_call_ops nfs4_get_lease_time_ops = {
4319         .rpc_call_prepare = nfs4_get_lease_time_prepare,
4320         .rpc_call_done = nfs4_get_lease_time_done,
4321 };
4322
4323 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4324 {
4325         struct rpc_task *task;
4326         struct nfs4_get_lease_time_args args;
4327         struct nfs4_get_lease_time_res res = {
4328                 .lr_fsinfo = fsinfo,
4329         };
4330         struct nfs4_get_lease_time_data data = {
4331                 .args = &args,
4332                 .res = &res,
4333                 .clp = clp,
4334         };
4335         struct rpc_message msg = {
4336                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4337                 .rpc_argp = &args,
4338                 .rpc_resp = &res,
4339         };
4340         struct rpc_task_setup task_setup = {
4341                 .rpc_client = clp->cl_rpcclient,
4342                 .rpc_message = &msg,
4343                 .callback_ops = &nfs4_get_lease_time_ops,
4344                 .callback_data = &data
4345         };
4346         int status;
4347
4348         res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4349         dprintk("--> %s\n", __func__);
4350         task = rpc_run_task(&task_setup);
4351
4352         if (IS_ERR(task))
4353                 status = PTR_ERR(task);
4354         else {
4355                 status = task->tk_status;
4356                 rpc_put_task(task);
4357         }
4358         dprintk("<-- %s return %d\n", __func__, status);
4359
4360         return status;
4361 }
4362
4363 /* Reset a slot table */
4364 static int nfs4_reset_slot_table(struct nfs4_session *session)
4365 {
4366         struct nfs4_slot_table *tbl = &session->fc_slot_table;
4367         int i, max_slots = session->fc_attrs.max_reqs;
4368         int old_max_slots = session->fc_slot_table.max_slots;
4369         int ret = 0;
4370
4371         dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
4372                 session->fc_attrs.max_reqs, tbl);
4373
4374         /* Until we have dynamic slot table adjustment, insist
4375          * upon the same slot table size */
4376         if (max_slots != old_max_slots) {
4377                 dprintk("%s reset slot table does't match old\n",
4378                         __func__);
4379                 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4380                 goto out;
4381         }
4382         spin_lock(&tbl->slot_tbl_lock);
4383         for (i = 0; i < max_slots; ++i)
4384                 tbl->slots[i].seq_nr = 1;
4385         tbl->highest_used_slotid = -1;
4386         spin_unlock(&tbl->slot_tbl_lock);
4387         dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4388                 tbl, tbl->slots, tbl->max_slots);
4389 out:
4390         dprintk("<-- %s: return %d\n", __func__, ret);
4391         return ret;
4392 }
4393
4394 /*
4395  * Initialize slot table
4396  */
4397 static int nfs4_init_slot_table(struct nfs4_session *session)
4398 {
4399         struct nfs4_slot_table *tbl = &session->fc_slot_table;
4400         int i, max_slots = session->fc_attrs.max_reqs;
4401         struct nfs4_slot *slot;
4402         int ret = -ENOMEM;
4403
4404         BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4405
4406         dprintk("--> %s: max_reqs=%u\n", __func__,
4407                 session->fc_attrs.max_reqs);
4408
4409         slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4410         if (!slot)
4411                 goto out;
4412         for (i = 0; i < max_slots; ++i)
4413                 slot[i].seq_nr = 1;
4414         ret = 0;
4415
4416         spin_lock(&tbl->slot_tbl_lock);
4417         if (tbl->slots != NULL) {
4418                 spin_unlock(&tbl->slot_tbl_lock);
4419                 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4420                         __func__, tbl, tbl->slots);
4421                 WARN_ON(1);
4422                 goto out_free;
4423         }
4424         tbl->max_slots = max_slots;
4425         tbl->slots = slot;
4426         tbl->highest_used_slotid = -1;  /* no slot is currently used */
4427         spin_unlock(&tbl->slot_tbl_lock);
4428         dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4429                 tbl, tbl->slots, tbl->max_slots);
4430 out:
4431         dprintk("<-- %s: return %d\n", __func__, ret);
4432         return ret;
4433 out_free:
4434         kfree(slot);
4435         goto out;
4436 }
4437
4438 /* Destroy the slot table */
4439 static void nfs4_destroy_slot_table(struct nfs4_session *session)
4440 {
4441         if (session->fc_slot_table.slots == NULL)
4442                 return;
4443         kfree(session->fc_slot_table.slots);
4444         session->fc_slot_table.slots = NULL;
4445         return;
4446 }
4447
4448 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4449 {
4450         struct nfs4_session *session;
4451         struct nfs4_slot_table *tbl;
4452
4453         session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4454         if (!session)
4455                 return NULL;
4456
4457         set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4458         /*
4459          * The create session reply races with the server back
4460          * channel probe. Mark the client NFS_CS_SESSION_INITING
4461          * so that the client back channel can find the
4462          * nfs_client struct
4463          */
4464         clp->cl_cons_state = NFS_CS_SESSION_INITING;
4465
4466         tbl = &session->fc_slot_table;
4467         spin_lock_init(&tbl->slot_tbl_lock);
4468         rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4469         session->clp = clp;
4470         return session;
4471 }
4472
4473 void nfs4_destroy_session(struct nfs4_session *session)
4474 {
4475         nfs4_destroy_slot_table(session);
4476         kfree(session);
4477 }
4478
4479 /*
4480  * Initialize the values to be used by the client in CREATE_SESSION
4481  * If nfs4_init_session set the fore channel request and response sizes,
4482  * use them.
4483  *
4484  * Set the back channel max_resp_sz_cached to zero to force the client to
4485  * always set csa_cachethis to FALSE because the current implementation
4486  * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4487  */
4488 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4489 {
4490         struct nfs4_session *session = args->client->cl_session;
4491         unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4492                      mxresp_sz = session->fc_attrs.max_resp_sz;
4493
4494         if (mxrqst_sz == 0)
4495                 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4496         if (mxresp_sz == 0)
4497                 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4498         /* Fore channel attributes */
4499         args->fc_attrs.headerpadsz = 0;
4500         args->fc_attrs.max_rqst_sz = mxrqst_sz;
4501         args->fc_attrs.max_resp_sz = mxresp_sz;
4502         args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4503         args->fc_attrs.max_ops = NFS4_MAX_OPS;
4504         args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4505
4506         dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4507                 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4508                 __func__,
4509                 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4510                 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4511                 args->fc_attrs.max_reqs);
4512
4513         /* Back channel attributes */
4514         args->bc_attrs.headerpadsz = 0;
4515         args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4516         args->bc_attrs.max_resp_sz = PAGE_SIZE;
4517         args->bc_attrs.max_resp_sz_cached = 0;
4518         args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4519         args->bc_attrs.max_reqs = 1;
4520
4521         dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4522                 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4523                 __func__,
4524                 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4525                 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4526                 args->bc_attrs.max_reqs);
4527 }
4528
4529 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4530 {
4531         if (rcvd <= sent)
4532                 return 0;
4533         printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4534                 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4535         return -EINVAL;
4536 }
4537
4538 #define _verify_fore_channel_attr(_name_) \
4539         _verify_channel_attr("fore", #_name_, \
4540                              args->fc_attrs._name_, \
4541                              session->fc_attrs._name_)
4542
4543 #define _verify_back_channel_attr(_name_) \
4544         _verify_channel_attr("back", #_name_, \
4545                              args->bc_attrs._name_, \
4546                              session->bc_attrs._name_)
4547
4548 /*
4549  * The server is not allowed to increase the fore channel header pad size,
4550  * maximum response size, or maximum number of operations.
4551  *
4552  * The back channel attributes are only negotiatied down: We send what the
4553  * (back channel) server insists upon.
4554  */
4555 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4556                                      struct nfs4_session *session)
4557 {
4558         int ret = 0;
4559
4560         ret |= _verify_fore_channel_attr(headerpadsz);
4561         ret |= _verify_fore_channel_attr(max_resp_sz);
4562         ret |= _verify_fore_channel_attr(max_ops);
4563
4564         ret |= _verify_back_channel_attr(headerpadsz);
4565         ret |= _verify_back_channel_attr(max_rqst_sz);
4566         ret |= _verify_back_channel_attr(max_resp_sz);
4567         ret |= _verify_back_channel_attr(max_resp_sz_cached);
4568         ret |= _verify_back_channel_attr(max_ops);
4569         ret |= _verify_back_channel_attr(max_reqs);
4570
4571         return ret;
4572 }
4573
4574 static int _nfs4_proc_create_session(struct nfs_client *clp)
4575 {
4576         struct nfs4_session *session = clp->cl_session;
4577         struct nfs41_create_session_args args = {
4578                 .client = clp,
4579                 .cb_program = NFS4_CALLBACK,
4580         };
4581         struct nfs41_create_session_res res = {
4582                 .client = clp,
4583         };
4584         struct rpc_message msg = {
4585                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4586                 .rpc_argp = &args,
4587                 .rpc_resp = &res,
4588         };
4589         int status;
4590
4591         nfs4_init_channel_attrs(&args);
4592         args.flags = (SESSION4_PERSIST);
4593
4594         status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4595
4596         if (!status)
4597                 /* Verify the session's negotiated channel_attrs values */
4598                 status = nfs4_verify_channel_attrs(&args, session);
4599         if (!status) {
4600                 /* Increment the clientid slot sequence id */
4601                 clp->cl_seqid++;
4602         }
4603
4604         return status;
4605 }
4606
4607 /*
4608  * Issues a CREATE_SESSION operation to the server.
4609  * It is the responsibility of the caller to verify the session is
4610  * expired before calling this routine.
4611  */
4612 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4613 {
4614         int status;
4615         unsigned *ptr;
4616         struct nfs_fsinfo fsinfo;
4617         struct nfs4_session *session = clp->cl_session;
4618
4619         dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4620
4621         status = _nfs4_proc_create_session(clp);
4622         if (status)
4623                 goto out;
4624
4625         /* Init or reset the fore channel */
4626         if (reset)
4627                 status = nfs4_reset_slot_table(session);
4628         else
4629                 status = nfs4_init_slot_table(session);
4630         dprintk("fore channel slot table initialization returned %d\n", status);
4631         if (status)
4632                 goto out;
4633
4634         ptr = (unsigned *)&session->sess_id.data[0];
4635         dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4636                 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4637
4638         if (reset)
4639                 /* Lease time is aleady set */
4640                 goto out;
4641
4642         /* Get the lease time */
4643         status = nfs4_proc_get_lease_time(clp, &fsinfo);
4644         if (status == 0) {
4645                 /* Update lease time and schedule renewal */
4646                 spin_lock(&clp->cl_lock);
4647                 clp->cl_lease_time = fsinfo.lease_time * HZ;
4648                 clp->cl_last_renewal = jiffies;
4649                 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4650                 spin_unlock(&clp->cl_lock);
4651
4652                 nfs4_schedule_state_renewal(clp);
4653         }
4654 out:
4655         dprintk("<-- %s\n", __func__);
4656         return status;
4657 }
4658
4659 /*
4660  * Issue the over-the-wire RPC DESTROY_SESSION.
4661  * The caller must serialize access to this routine.
4662  */
4663 int nfs4_proc_destroy_session(struct nfs4_session *session)
4664 {
4665         int status = 0;
4666         struct rpc_message msg;
4667
4668         dprintk("--> nfs4_proc_destroy_session\n");
4669
4670         /* session is still being setup */
4671         if (session->clp->cl_cons_state != NFS_CS_READY)
4672                 return status;
4673
4674         msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4675         msg.rpc_argp = session;
4676         msg.rpc_resp = NULL;
4677         msg.rpc_cred = NULL;
4678         status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4679
4680         if (status)
4681                 printk(KERN_WARNING
4682                         "Got error %d from the server on DESTROY_SESSION. "
4683                         "Session has been destroyed regardless...\n", status);
4684
4685         dprintk("<-- nfs4_proc_destroy_session\n");
4686         return status;
4687 }
4688
4689 /*
4690  * Renew the cl_session lease.
4691  */
4692 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4693 {
4694         struct nfs4_sequence_args args;
4695         struct nfs4_sequence_res res;
4696
4697         struct rpc_message msg = {
4698                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4699                 .rpc_argp = &args,
4700                 .rpc_resp = &res,
4701                 .rpc_cred = cred,
4702         };
4703
4704         args.sa_cache_this = 0;
4705
4706         return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4707                                        &res, 0);
4708 }
4709
4710 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4711 {
4712         struct nfs_client *clp = (struct nfs_client *)data;
4713
4714         nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4715
4716         if (task->tk_status < 0) {
4717                 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4718
4719                 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4720                                                                 == -EAGAIN) {
4721                         nfs4_restart_rpc(task, clp);
4722                         return;
4723                 }
4724         }
4725         nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4726         dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4727
4728         put_rpccred(task->tk_msg.rpc_cred);
4729         kfree(task->tk_msg.rpc_argp);
4730         kfree(task->tk_msg.rpc_resp);
4731
4732         dprintk("<-- %s\n", __func__);
4733 }
4734
4735 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4736 {
4737         struct nfs_client *clp;
4738         struct nfs4_sequence_args *args;
4739         struct nfs4_sequence_res *res;
4740
4741         clp = (struct nfs_client *)data;
4742         args = task->tk_msg.rpc_argp;
4743         res = task->tk_msg.rpc_resp;
4744
4745         if (nfs4_setup_sequence(clp, args, res, 0, task))
4746                 return;
4747         rpc_call_start(task);
4748 }
4749
4750 static const struct rpc_call_ops nfs41_sequence_ops = {
4751         .rpc_call_done = nfs41_sequence_call_done,
4752         .rpc_call_prepare = nfs41_sequence_prepare,
4753 };
4754
4755 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4756                                      struct rpc_cred *cred)
4757 {
4758         struct nfs4_sequence_args *args;
4759         struct nfs4_sequence_res *res;
4760         struct rpc_message msg = {
4761                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4762                 .rpc_cred = cred,
4763         };
4764
4765         args = kzalloc(sizeof(*args), GFP_KERNEL);
4766         if (!args)
4767                 return -ENOMEM;
4768         res = kzalloc(sizeof(*res), GFP_KERNEL);
4769         if (!res) {
4770                 kfree(args);
4771                 return -ENOMEM;
4772         }
4773         res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4774         msg.rpc_argp = args;
4775         msg.rpc_resp = res;
4776
4777         return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4778                               &nfs41_sequence_ops, (void *)clp);
4779 }
4780
4781 #endif /* CONFIG_NFS_V4_1 */
4782
4783 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4784         .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4785         .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4786         .recover_open   = nfs4_open_reclaim,
4787         .recover_lock   = nfs4_lock_reclaim,
4788         .establish_clid = nfs4_init_clientid,
4789         .get_clid_cred  = nfs4_get_setclientid_cred,
4790 };
4791
4792 #if defined(CONFIG_NFS_V4_1)
4793 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4794         .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4795         .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4796         .recover_open   = nfs4_open_reclaim,
4797         .recover_lock   = nfs4_lock_reclaim,
4798         .establish_clid = nfs4_proc_exchange_id,
4799 };
4800 #endif /* CONFIG_NFS_V4_1 */
4801
4802 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4803         .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4804         .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4805         .recover_open   = nfs4_open_expired,
4806         .recover_lock   = nfs4_lock_expired,
4807         .establish_clid = nfs4_init_clientid,
4808         .get_clid_cred  = nfs4_get_setclientid_cred,
4809 };
4810
4811 #if defined(CONFIG_NFS_V4_1)
4812 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
4813         .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4814         .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4815         .recover_open   = nfs4_open_expired,
4816         .recover_lock   = nfs4_lock_expired,
4817         .establish_clid = nfs4_proc_exchange_id,
4818 };
4819 #endif /* CONFIG_NFS_V4_1 */
4820
4821 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4822         .sched_state_renewal = nfs4_proc_async_renew,
4823         .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
4824         .renew_lease = nfs4_proc_renew,
4825 };
4826
4827 #if defined(CONFIG_NFS_V4_1)
4828 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4829         .sched_state_renewal = nfs41_proc_async_sequence,
4830         .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
4831         .renew_lease = nfs4_proc_sequence,
4832 };
4833 #endif
4834
4835 /*
4836  * Per minor version reboot and network partition recovery ops
4837  */
4838
4839 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4840         &nfs40_reboot_recovery_ops,
4841 #if defined(CONFIG_NFS_V4_1)
4842         &nfs41_reboot_recovery_ops,
4843 #endif
4844 };
4845
4846 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4847         &nfs40_nograce_recovery_ops,
4848 #if defined(CONFIG_NFS_V4_1)
4849         &nfs41_nograce_recovery_ops,
4850 #endif
4851 };
4852
4853 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4854         &nfs40_state_renewal_ops,
4855 #if defined(CONFIG_NFS_V4_1)
4856         &nfs41_state_renewal_ops,
4857 #endif
4858 };
4859
4860 static const struct inode_operations nfs4_file_inode_operations = {
4861         .permission     = nfs_permission,
4862         .getattr        = nfs_getattr,
4863         .setattr        = nfs_setattr,
4864         .getxattr       = nfs4_getxattr,
4865         .setxattr       = nfs4_setxattr,
4866         .listxattr      = nfs4_listxattr,
4867 };
4868
4869 const struct nfs_rpc_ops nfs_v4_clientops = {
4870         .version        = 4,                    /* protocol version */
4871         .dentry_ops     = &nfs4_dentry_operations,
4872         .dir_inode_ops  = &nfs4_dir_inode_operations,
4873         .file_inode_ops = &nfs4_file_inode_operations,
4874         .getroot        = nfs4_proc_get_root,
4875         .getattr        = nfs4_proc_getattr,
4876         .setattr        = nfs4_proc_setattr,
4877         .lookupfh       = nfs4_proc_lookupfh,
4878         .lookup         = nfs4_proc_lookup,
4879         .access         = nfs4_proc_access,
4880         .readlink       = nfs4_proc_readlink,
4881         .create         = nfs4_proc_create,
4882         .remove         = nfs4_proc_remove,
4883         .unlink_setup   = nfs4_proc_unlink_setup,
4884         .unlink_done    = nfs4_proc_unlink_done,
4885         .rename         = nfs4_proc_rename,
4886         .link           = nfs4_proc_link,
4887         .symlink        = nfs4_proc_symlink,
4888         .mkdir          = nfs4_proc_mkdir,
4889         .rmdir          = nfs4_proc_remove,
4890         .readdir        = nfs4_proc_readdir,
4891         .mknod          = nfs4_proc_mknod,
4892         .statfs         = nfs4_proc_statfs,
4893         .fsinfo         = nfs4_proc_fsinfo,
4894         .pathconf       = nfs4_proc_pathconf,
4895         .set_capabilities = nfs4_server_capabilities,
4896         .decode_dirent  = nfs4_decode_dirent,
4897         .read_setup     = nfs4_proc_read_setup,
4898         .read_done      = nfs4_read_done,
4899         .write_setup    = nfs4_proc_write_setup,
4900         .write_done     = nfs4_write_done,
4901         .commit_setup   = nfs4_proc_commit_setup,
4902         .commit_done    = nfs4_commit_done,
4903         .lock           = nfs4_proc_lock,
4904         .clear_acl_cache = nfs4_zap_acl_attr,
4905         .close_context  = nfs4_close_context,
4906 };
4907
4908 /*
4909  * Local variables:
4910  *  c-basic-offset: 8
4911  * End:
4912  */