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/delay.h>
  40 #include <linux/errno.h>
  41 #include <linux/string.h>
  42 #include <linux/slab.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/namei.h>
  49 #include <linux/mount.h>
  50 #include <linux/module.h>
  51 #include <linux/sunrpc/bc_xprt.h>
  52
  53 #include "nfs4_fs.h"
  54 #include "delegation.h"
  55 #include "internal.h"
  56 #include "iostat.h"
  57 #include "callback.h"
  58 #include "pnfs.h"
  59
  60 #define NFSDBG_FACILITY         NFSDBG_PROC
  61
  62 #define NFS4_POLL_RETRY_MIN     (HZ/10)
  63 #define NFS4_POLL_RETRY_MAX     (15*HZ)
  64
  65 #define NFS4_MAX_LOOP_ON_RECOVER (10)
  66
  67 struct nfs4_opendata;
  68 static int _nfs4_proc_open(struct nfs4_opendata *data);
  69 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
  70 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
  71 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
  72 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
  73 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
  74 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
  75                             struct nfs_fattr *fattr, struct iattr *sattr,
  76                             struct nfs4_state *state);
  77
  78 /* Prevent leaks of NFSv4 errors into userland */
  79 static int nfs4_map_errors(int err)
  80 {
  81         if (err >= -1000)
  82                 return err;
  83         switch (err) {
  84         case -NFS4ERR_RESOURCE:
  85                 return -EREMOTEIO;
  86         default:
  87                 dprintk("%s could not handle NFSv4 error %d\n",
  88                                 __func__, -err);
  89                 break;
  90         }
  91         return -EIO;
  92 }
  93
  94 /*
  95  * This is our standard bitmap for GETATTR requests.
  96  */
  97 const u32 nfs4_fattr_bitmap[2] = {
  98         FATTR4_WORD0_TYPE
  99         | FATTR4_WORD0_CHANGE
 100         | FATTR4_WORD0_SIZE
 101         | FATTR4_WORD0_FSID
 102         | FATTR4_WORD0_FILEID,
 103         FATTR4_WORD1_MODE
 104         | FATTR4_WORD1_NUMLINKS
 105         | FATTR4_WORD1_OWNER
 106         | FATTR4_WORD1_OWNER_GROUP
 107         | FATTR4_WORD1_RAWDEV
 108         | FATTR4_WORD1_SPACE_USED
 109         | FATTR4_WORD1_TIME_ACCESS
 110         | FATTR4_WORD1_TIME_METADATA
 111         | FATTR4_WORD1_TIME_MODIFY
 112 };
 113
 114 const u32 nfs4_statfs_bitmap[2] = {
 115         FATTR4_WORD0_FILES_AVAIL
 116         | FATTR4_WORD0_FILES_FREE
 117         | FATTR4_WORD0_FILES_TOTAL,
 118         FATTR4_WORD1_SPACE_AVAIL
 119         | FATTR4_WORD1_SPACE_FREE
 120         | FATTR4_WORD1_SPACE_TOTAL
 121 };
 122
 123 const u32 nfs4_pathconf_bitmap[2] = {
 124         FATTR4_WORD0_MAXLINK
 125         | FATTR4_WORD0_MAXNAME,
 126         0
 127 };
 128
 129 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
 130                         | FATTR4_WORD0_MAXREAD
 131                         | FATTR4_WORD0_MAXWRITE
 132                         | FATTR4_WORD0_LEASE_TIME,
 133                         FATTR4_WORD1_TIME_DELTA
 134                         | FATTR4_WORD1_FS_LAYOUT_TYPES
 135 };
 136
 137 const u32 nfs4_fs_locations_bitmap[2] = {
 138         FATTR4_WORD0_TYPE
 139         | FATTR4_WORD0_CHANGE
 140         | FATTR4_WORD0_SIZE
 141         | FATTR4_WORD0_FSID
 142         | FATTR4_WORD0_FILEID
 143         | FATTR4_WORD0_FS_LOCATIONS,
 144         FATTR4_WORD1_MODE
 145         | FATTR4_WORD1_NUMLINKS
 146         | FATTR4_WORD1_OWNER
 147         | FATTR4_WORD1_OWNER_GROUP
 148         | FATTR4_WORD1_RAWDEV
 149         | FATTR4_WORD1_SPACE_USED
 150         | FATTR4_WORD1_TIME_ACCESS
 151         | FATTR4_WORD1_TIME_METADATA
 152         | FATTR4_WORD1_TIME_MODIFY
 153         | FATTR4_WORD1_MOUNTED_ON_FILEID
 154 };
 155
 156 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
 157                 struct nfs4_readdir_arg *readdir)
 158 {
 159         __be32 *start, *p;
 160
 161         BUG_ON(readdir->count < 80);
 162         if (cookie > 2) {
 163                 readdir->cookie = cookie;
 164                 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
 165                 return;
 166         }
 167
 168         readdir->cookie = 0;
 169         memset(&readdir->verifier, 0, sizeof(readdir->verifier));
 170         if (cookie == 2)
 171                 return;
 172
 173         /*
 174          * NFSv4 servers do not return entries for '.' and '..'
 175          * Therefore, we fake these entries here.  We let '.'
 176          * have cookie 0 and '..' have cookie 1.  Note that
 177          * when talking to the server, we always send cookie 0
 178          * instead of 1 or 2.
 179          */
 180         start = p = kmap_atomic(*readdir->pages, KM_USER0);
 181
 182         if (cookie == 0) {
 183                 *p++ = xdr_one;                                  /* next */
 184                 *p++ = xdr_zero;                   /* cookie, first word */
 185                 *p++ = xdr_one;                   /* cookie, second word */
 186                 *p++ = xdr_one;                             /* entry len */
 187                 memcpy(p, ".\0\0\0", 4);                        /* entry */
 188                 p++;
 189                 *p++ = xdr_one;                         /* bitmap length */
 190                 *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 191                 *p++ = htonl(8);              /* attribute buffer length */
 192                 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
 193         }
 194
 195         *p++ = xdr_one;                                  /* next */
 196         *p++ = xdr_zero;                   /* cookie, first word */
 197         *p++ = xdr_two;                   /* cookie, second word */
 198         *p++ = xdr_two;                             /* entry len */
 199         memcpy(p, "..\0\0", 4);                         /* entry */
 200         p++;
 201         *p++ = xdr_one;                         /* bitmap length */
 202         *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 203         *p++ = htonl(8);              /* attribute buffer length */
 204         p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
 205
 206         readdir->pgbase = (char *)p - (char *)start;
 207         readdir->count -= readdir->pgbase;
 208         kunmap_atomic(start, KM_USER0);
 209 }
 210
 211 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
 212 {
 213         int res;
 214
 215         might_sleep();
 216
 217         res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
 218                         nfs_wait_bit_killable, TASK_KILLABLE);
 219         return res;
 220 }
 221
 222 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
 223 {
 224         int res = 0;
 225
 226         might_sleep();
 227
 228         if (*timeout <= 0)
 229                 *timeout = NFS4_POLL_RETRY_MIN;
 230         if (*timeout > NFS4_POLL_RETRY_MAX)
 231                 *timeout = NFS4_POLL_RETRY_MAX;
 232         schedule_timeout_killable(*timeout);
 233         if (fatal_signal_pending(current))
 234                 res = -ERESTARTSYS;
 235         *timeout <<= 1;
 236         return res;
 237 }
 238
 239 /* This is the error handling routine for processes that are allowed
 240  * to sleep.
 241  */
 242 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
 243 {
 244         struct nfs_client *clp = server->nfs_client;
 245         struct nfs4_state *state = exception->state;
 246         int ret = errorcode;
 247
 248         exception->retry = 0;
 249         switch(errorcode) {
 250                 case 0:
 251                         return 0;
 252                 case -NFS4ERR_ADMIN_REVOKED:
 253                 case -NFS4ERR_BAD_STATEID:
 254                 case -NFS4ERR_OPENMODE:
 255                         if (state == NULL)
 256                                 break;
 257                         nfs4_state_mark_reclaim_nograce(clp, state);
 258                         goto do_state_recovery;
 259                 case -NFS4ERR_STALE_STATEID:
 260                 case -NFS4ERR_STALE_CLIENTID:
 261                 case -NFS4ERR_EXPIRED:
 262                         goto do_state_recovery;
 263 #if defined(CONFIG_NFS_V4_1)
 264                 case -NFS4ERR_BADSESSION:
 265                 case -NFS4ERR_BADSLOT:
 266                 case -NFS4ERR_BAD_HIGH_SLOT:
 267                 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
 268                 case -NFS4ERR_DEADSESSION:
 269                 case -NFS4ERR_SEQ_FALSE_RETRY:
 270                 case -NFS4ERR_SEQ_MISORDERED:
 271                         dprintk("%s ERROR: %d Reset session\n", __func__,
 272                                 errorcode);
 273                         nfs4_schedule_state_recovery(clp);
 274                         exception->retry = 1;
 275                         break;
 276 #endif /* defined(CONFIG_NFS_V4_1) */
 277                 case -NFS4ERR_FILE_OPEN:
 278                         if (exception->timeout > HZ) {
 279                                 /* We have retried a decent amount, time to
 280                                  * fail
 281                                  */
 282                                 ret = -EBUSY;
 283                                 break;
 284                         }
 285                 case -NFS4ERR_GRACE:
 286                 case -NFS4ERR_DELAY:
 287                 case -EKEYEXPIRED:
 288                         ret = nfs4_delay(server->client, &exception->timeout);
 289                         if (ret != 0)
 290                                 break;
 291                 case -NFS4ERR_OLD_STATEID:
 292                         exception->retry = 1;
 293         }
 294         /* We failed to handle the error */
 295         return nfs4_map_errors(ret);
 296 do_state_recovery:
 297         nfs4_schedule_state_recovery(clp);
 298         ret = nfs4_wait_clnt_recover(clp);
 299         if (ret == 0)
 300                 exception->retry = 1;
 301         return ret;
 302 }
 303
 304
 305 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
 306 {
 307         spin_lock(&clp->cl_lock);
 308         if (time_before(clp->cl_last_renewal,timestamp))
 309                 clp->cl_last_renewal = timestamp;
 310         spin_unlock(&clp->cl_lock);
 311 }
 312
 313 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
 314 {
 315         do_renew_lease(server->nfs_client, timestamp);
 316 }
 317
 318 #if defined(CONFIG_NFS_V4_1)
 319
 320 /*
 321  * nfs4_free_slot - free a slot and efficiently update slot table.
 322  *
 323  * freeing a slot is trivially done by clearing its respective bit
 324  * in the bitmap.
 325  * If the freed slotid equals highest_used_slotid we want to update it
 326  * so that the server would be able to size down the slot table if needed,
 327  * otherwise we know that the highest_used_slotid is still in use.
 328  * When updating highest_used_slotid there may be "holes" in the bitmap
 329  * so we need to scan down from highest_used_slotid to 0 looking for the now
 330  * highest slotid in use.
 331  * If none found, highest_used_slotid is set to -1.
 332  *
 333  * Must be called while holding tbl->slot_tbl_lock
 334  */
 335 static void
 336 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
 337 {
 338         int free_slotid = free_slot - tbl->slots;
 339         int slotid = free_slotid;
 340
 341         BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
 342         /* clear used bit in bitmap */
 343         __clear_bit(slotid, tbl->used_slots);
 344
 345         /* update highest_used_slotid when it is freed */
 346         if (slotid == tbl->highest_used_slotid) {
 347                 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
 348                 if (slotid < tbl->max_slots)
 349                         tbl->highest_used_slotid = slotid;
 350                 else
 351                         tbl->highest_used_slotid = -1;
 352         }
 353         dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
 354                 free_slotid, tbl->highest_used_slotid);
 355 }
 356
 357 /*
 358  * Signal state manager thread if session is drained
 359  */
 360 static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
 361 {
 362         struct rpc_task *task;
 363
 364         if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
 365                 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
 366                 if (task)
 367                         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
 368                 return;
 369         }
 370
 371         if (ses->fc_slot_table.highest_used_slotid != -1)
 372                 return;
 373
 374         dprintk("%s COMPLETE: Session Drained\n", __func__);
 375         complete(&ses->complete);
 376 }
 377
 378 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
 379 {
 380         struct nfs4_slot_table *tbl;
 381
 382         tbl = &res->sr_session->fc_slot_table;
 383         if (!res->sr_slot) {
 384                 /* just wake up the next guy waiting since
 385                  * we may have not consumed a slot after all */
 386                 dprintk("%s: No slot\n", __func__);
 387                 return;
 388         }
 389
 390         spin_lock(&tbl->slot_tbl_lock);
 391         nfs4_free_slot(tbl, res->sr_slot);
 392         nfs41_check_drain_session_complete(res->sr_session);
 393         spin_unlock(&tbl->slot_tbl_lock);
 394         res->sr_slot = NULL;
 395 }
 396
 397 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
 398 {
 399         unsigned long timestamp;
 400         struct nfs_client *clp;
 401
 402         /*
 403          * sr_status remains 1 if an RPC level error occurred. The server
 404          * may or may not have processed the sequence operation..
 405          * Proceed as if the server received and processed the sequence
 406          * operation.
 407          */
 408         if (res->sr_status == 1)
 409                 res->sr_status = NFS_OK;
 410
 411         /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
 412         if (!res->sr_slot)
 413                 goto out;
 414
 415         /* Check the SEQUENCE operation status */
 416         switch (res->sr_status) {
 417         case 0:
 418                 /* Update the slot's sequence and clientid lease timer */
 419                 ++res->sr_slot->seq_nr;
 420                 timestamp = res->sr_renewal_time;
 421                 clp = res->sr_session->clp;
 422                 do_renew_lease(clp, timestamp);
 423                 /* Check sequence flags */
 424                 if (atomic_read(&clp->cl_count) > 1)
 425                         nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
 426                 break;
 427         case -NFS4ERR_DELAY:
 428                 /* The server detected a resend of the RPC call and
 429                  * returned NFS4ERR_DELAY as per Section 2.10.6.2
 430                  * of RFC5661.
 431                  */
 432                 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
 433                         __func__,
 434                         res->sr_slot - res->sr_session->fc_slot_table.slots,
 435                         res->sr_slot->seq_nr);
 436                 goto out_retry;
 437         default:
 438                 /* Just update the slot sequence no. */
 439                 ++res->sr_slot->seq_nr;
 440         }
 441 out:
 442         /* The session may be reset by one of the error handlers. */
 443         dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
 444         nfs41_sequence_free_slot(res);
 445         return 1;
 446 out_retry:
 447         if (!rpc_restart_call(task))
 448                 goto out;
 449         rpc_delay(task, NFS4_POLL_RETRY_MAX);
 450         return 0;
 451 }
 452
 453 static int nfs4_sequence_done(struct rpc_task *task,
 454                                struct nfs4_sequence_res *res)
 455 {
 456         if (res->sr_session == NULL)
 457                 return 1;
 458         return nfs41_sequence_done(task, res);
 459 }
 460
 461 /*
 462  * nfs4_find_slot - efficiently look for a free slot
 463  *
 464  * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
 465  * If found, we mark the slot as used, update the highest_used_slotid,
 466  * and respectively set up the sequence operation args.
 467  * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
 468  *
 469  * Note: must be called with under the slot_tbl_lock.
 470  */
 471 static u8
 472 nfs4_find_slot(struct nfs4_slot_table *tbl)
 473 {
 474         int slotid;
 475         u8 ret_id = NFS4_MAX_SLOT_TABLE;
 476         BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
 477
 478         dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
 479                 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
 480                 tbl->max_slots);
 481         slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
 482         if (slotid >= tbl->max_slots)
 483                 goto out;
 484         __set_bit(slotid, tbl->used_slots);
 485         if (slotid > tbl->highest_used_slotid)
 486                 tbl->highest_used_slotid = slotid;
 487         ret_id = slotid;
 488 out:
 489         dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
 490                 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
 491         return ret_id;
 492 }
 493
 494 static int nfs41_setup_sequence(struct nfs4_session *session,
 495                                 struct nfs4_sequence_args *args,
 496                                 struct nfs4_sequence_res *res,
 497                                 int cache_reply,
 498                                 struct rpc_task *task)
 499 {
 500         struct nfs4_slot *slot;
 501         struct nfs4_slot_table *tbl;
 502         u8 slotid;
 503
 504         dprintk("--> %s\n", __func__);
 505         /* slot already allocated? */
 506         if (res->sr_slot != NULL)
 507                 return 0;
 508
 509         tbl = &session->fc_slot_table;
 510
 511         spin_lock(&tbl->slot_tbl_lock);
 512         if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
 513             !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
 514                 /*
 515                  * The state manager will wait until the slot table is empty.
 516                  * Schedule the reset thread
 517                  */
 518                 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
 519                 spin_unlock(&tbl->slot_tbl_lock);
 520                 dprintk("%s Schedule Session Reset\n", __func__);
 521                 return -EAGAIN;
 522         }
 523
 524         if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
 525             !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
 526                 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
 527                 spin_unlock(&tbl->slot_tbl_lock);
 528                 dprintk("%s enforce FIFO order\n", __func__);
 529                 return -EAGAIN;
 530         }
 531
 532         slotid = nfs4_find_slot(tbl);
 533         if (slotid == NFS4_MAX_SLOT_TABLE) {
 534                 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
 535                 spin_unlock(&tbl->slot_tbl_lock);
 536                 dprintk("<-- %s: no free slots\n", __func__);
 537                 return -EAGAIN;
 538         }
 539         spin_unlock(&tbl->slot_tbl_lock);
 540
 541         rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
 542         slot = tbl->slots + slotid;
 543         args->sa_session = session;
 544         args->sa_slotid = slotid;
 545         args->sa_cache_this = cache_reply;
 546
 547         dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
 548
 549         res->sr_session = session;
 550         res->sr_slot = slot;
 551         res->sr_renewal_time = jiffies;
 552         res->sr_status_flags = 0;
 553         /*
 554          * sr_status is only set in decode_sequence, and so will remain
 555          * set to 1 if an rpc level failure occurs.
 556          */
 557         res->sr_status = 1;
 558         return 0;
 559 }
 560
 561 int nfs4_setup_sequence(const struct nfs_server *server,
 562                         struct nfs4_sequence_args *args,
 563                         struct nfs4_sequence_res *res,
 564                         int cache_reply,
 565                         struct rpc_task *task)
 566 {
 567         struct nfs4_session *session = nfs4_get_session(server);
 568         int ret = 0;
 569
 570         if (session == NULL) {
 571                 args->sa_session = NULL;
 572                 res->sr_session = NULL;
 573                 goto out;
 574         }
 575
 576         dprintk("--> %s clp %p session %p sr_slot %td\n",
 577                 __func__, session->clp, session, res->sr_slot ?
 578                         res->sr_slot - session->fc_slot_table.slots : -1);
 579
 580         ret = nfs41_setup_sequence(session, args, res, cache_reply,
 581                                    task);
 582 out:
 583         dprintk("<-- %s status=%d\n", __func__, ret);
 584         return ret;
 585 }
 586
 587 struct nfs41_call_sync_data {
 588         const struct nfs_server *seq_server;
 589         struct nfs4_sequence_args *seq_args;
 590         struct nfs4_sequence_res *seq_res;
 591         int cache_reply;
 592 };
 593
 594 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
 595 {
 596         struct nfs41_call_sync_data *data = calldata;
 597
 598         dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
 599
 600         if (nfs4_setup_sequence(data->seq_server, data->seq_args,
 601                                 data->seq_res, data->cache_reply, task))
 602                 return;
 603         rpc_call_start(task);
 604 }
 605
 606 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
 607 {
 608         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
 609         nfs41_call_sync_prepare(task, calldata);
 610 }
 611
 612 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
 613 {
 614         struct nfs41_call_sync_data *data = calldata;
 615
 616         nfs41_sequence_done(task, data->seq_res);
 617 }
 618
 619 struct rpc_call_ops nfs41_call_sync_ops = {
 620         .rpc_call_prepare = nfs41_call_sync_prepare,
 621         .rpc_call_done = nfs41_call_sync_done,
 622 };
 623
 624 struct rpc_call_ops nfs41_call_priv_sync_ops = {
 625         .rpc_call_prepare = nfs41_call_priv_sync_prepare,
 626         .rpc_call_done = nfs41_call_sync_done,
 627 };
 628
 629 static int nfs4_call_sync_sequence(struct nfs_server *server,
 630                                    struct rpc_message *msg,
 631                                    struct nfs4_sequence_args *args,
 632                                    struct nfs4_sequence_res *res,
 633                                    int cache_reply,
 634                                    int privileged)
 635 {
 636         int ret;
 637         struct rpc_task *task;
 638         struct nfs41_call_sync_data data = {
 639                 .seq_server = server,
 640                 .seq_args = args,
 641                 .seq_res = res,
 642                 .cache_reply = cache_reply,
 643         };
 644         struct rpc_task_setup task_setup = {
 645                 .rpc_client = server->client,
 646                 .rpc_message = msg,
 647                 .callback_ops = &nfs41_call_sync_ops,
 648                 .callback_data = &data
 649         };
 650
 651         res->sr_slot = NULL;
 652         if (privileged)
 653                 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
 654         task = rpc_run_task(&task_setup);
 655         if (IS_ERR(task))
 656                 ret = PTR_ERR(task);
 657         else {
 658                 ret = task->tk_status;
 659                 rpc_put_task(task);
 660         }
 661         return ret;
 662 }
 663
 664 int _nfs4_call_sync_session(struct nfs_server *server,
 665                             struct rpc_message *msg,
 666                             struct nfs4_sequence_args *args,
 667                             struct nfs4_sequence_res *res,
 668                             int cache_reply)
 669 {
 670         return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
 671 }
 672
 673 #else
 674 static int nfs4_sequence_done(struct rpc_task *task,
 675                                struct nfs4_sequence_res *res)
 676 {
 677         return 1;
 678 }
 679 #endif /* CONFIG_NFS_V4_1 */
 680
 681 int _nfs4_call_sync(struct nfs_server *server,
 682                     struct rpc_message *msg,
 683                     struct nfs4_sequence_args *args,
 684                     struct nfs4_sequence_res *res,
 685                     int cache_reply)
 686 {
 687         args->sa_session = res->sr_session = NULL;
 688         return rpc_call_sync(server->client, msg, 0);
 689 }
 690
 691 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
 692         (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
 693                         &(res)->seq_res, (cache_reply))
 694
 695 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
 696 {
 697         struct nfs_inode *nfsi = NFS_I(dir);
 698
 699         spin_lock(&dir->i_lock);
 700         nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
 701         if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
 702                 nfs_force_lookup_revalidate(dir);
 703         nfsi->change_attr = cinfo->after;
 704         spin_unlock(&dir->i_lock);
 705 }
 706
 707 struct nfs4_opendata {
 708         struct kref kref;
 709         struct nfs_openargs o_arg;
 710         struct nfs_openres o_res;
 711         struct nfs_open_confirmargs c_arg;
 712         struct nfs_open_confirmres c_res;
 713         struct nfs_fattr f_attr;
 714         struct nfs_fattr dir_attr;
 715         struct path path;
 716         struct dentry *dir;
 717         struct nfs4_state_owner *owner;
 718         struct nfs4_state *state;
 719         struct iattr attrs;
 720         unsigned long timestamp;
 721         unsigned int rpc_done : 1;
 722         int rpc_status;
 723         int cancelled;
 724 };
 725
 726
 727 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
 728 {
 729         p->o_res.f_attr = &p->f_attr;
 730         p->o_res.dir_attr = &p->dir_attr;
 731         p->o_res.seqid = p->o_arg.seqid;
 732         p->c_res.seqid = p->c_arg.seqid;
 733         p->o_res.server = p->o_arg.server;
 734         nfs_fattr_init(&p->f_attr);
 735         nfs_fattr_init(&p->dir_attr);
 736 }
 737
 738 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
 739                 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
 740                 const struct iattr *attrs,
 741                 gfp_t gfp_mask)
 742 {
 743         struct dentry *parent = dget_parent(path->dentry);
 744         struct inode *dir = parent->d_inode;
 745         struct nfs_server *server = NFS_SERVER(dir);
 746         struct nfs4_opendata *p;
 747
 748         p = kzalloc(sizeof(*p), gfp_mask);
 749         if (p == NULL)
 750                 goto err;
 751         p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
 752         if (p->o_arg.seqid == NULL)
 753                 goto err_free;
 754         path_get(path);
 755         p->path = *path;
 756         p->dir = parent;
 757         p->owner = sp;
 758         atomic_inc(&sp->so_count);
 759         p->o_arg.fh = NFS_FH(dir);
 760         p->o_arg.open_flags = flags;
 761         p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
 762         p->o_arg.clientid = server->nfs_client->cl_clientid;
 763         p->o_arg.id = sp->so_owner_id.id;
 764         p->o_arg.name = &p->path.dentry->d_name;
 765         p->o_arg.server = server;
 766         p->o_arg.bitmask = server->attr_bitmask;
 767         p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
 768         if (flags & O_CREAT) {
 769                 u32 *s;
 770
 771                 p->o_arg.u.attrs = &p->attrs;
 772                 memcpy(&p->attrs, attrs, sizeof(p->attrs));
 773                 s = (u32 *) p->o_arg.u.verifier.data;
 774                 s[0] = jiffies;
 775                 s[1] = current->pid;
 776         }
 777         p->c_arg.fh = &p->o_res.fh;
 778         p->c_arg.stateid = &p->o_res.stateid;
 779         p->c_arg.seqid = p->o_arg.seqid;
 780         nfs4_init_opendata_res(p);
 781         kref_init(&p->kref);
 782         return p;
 783 err_free:
 784         kfree(p);
 785 err:
 786         dput(parent);
 787         return NULL;
 788 }
 789
 790 static void nfs4_opendata_free(struct kref *kref)
 791 {
 792         struct nfs4_opendata *p = container_of(kref,
 793                         struct nfs4_opendata, kref);
 794
 795         nfs_free_seqid(p->o_arg.seqid);
 796         if (p->state != NULL)
 797                 nfs4_put_open_state(p->state);
 798         nfs4_put_state_owner(p->owner);
 799         dput(p->dir);
 800         path_put(&p->path);
 801         kfree(p);
 802 }
 803
 804 static void nfs4_opendata_put(struct nfs4_opendata *p)
 805 {
 806         if (p != NULL)
 807                 kref_put(&p->kref, nfs4_opendata_free);
 808 }
 809
 810 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
 811 {
 812         int ret;
 813
 814         ret = rpc_wait_for_completion_task(task);
 815         return ret;
 816 }
 817
 818 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
 819 {
 820         int ret = 0;
 821
 822         if (open_mode & O_EXCL)
 823                 goto out;
 824         switch (mode & (FMODE_READ|FMODE_WRITE)) {
 825                 case FMODE_READ:
 826                         ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
 827                                 && state->n_rdonly != 0;
 828                         break;
 829                 case FMODE_WRITE:
 830                         ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
 831                                 && state->n_wronly != 0;
 832                         break;
 833                 case FMODE_READ|FMODE_WRITE:
 834                         ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
 835                                 && state->n_rdwr != 0;
 836         }
 837 out:
 838         return ret;
 839 }
 840
 841 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
 842 {
 843         if ((delegation->type & fmode) != fmode)
 844                 return 0;
 845         if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
 846                 return 0;
 847         nfs_mark_delegation_referenced(delegation);
 848         return 1;
 849 }
 850
 851 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
 852 {
 853         switch (fmode) {
 854                 case FMODE_WRITE:
 855                         state->n_wronly++;
 856                         break;
 857                 case FMODE_READ:
 858                         state->n_rdonly++;
 859                         break;
 860                 case FMODE_READ|FMODE_WRITE:
 861                         state->n_rdwr++;
 862         }
 863         nfs4_state_set_mode_locked(state, state->state | fmode);
 864 }
 865
 866 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
 867 {
 868         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
 869                 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
 870         memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
 871         switch (fmode) {
 872                 case FMODE_READ:
 873                         set_bit(NFS_O_RDONLY_STATE, &state->flags);
 874                         break;
 875                 case FMODE_WRITE:
 876                         set_bit(NFS_O_WRONLY_STATE, &state->flags);
 877                         break;
 878                 case FMODE_READ|FMODE_WRITE:
 879                         set_bit(NFS_O_RDWR_STATE, &state->flags);
 880         }
 881 }
 882
 883 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
 884 {
 885         write_seqlock(&state->seqlock);
 886         nfs_set_open_stateid_locked(state, stateid, fmode);
 887         write_sequnlock(&state->seqlock);
 888 }
 889
 890 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
 891 {
 892         /*
 893          * Protect the call to nfs4_state_set_mode_locked and
 894          * serialise the stateid update
 895          */
 896         write_seqlock(&state->seqlock);
 897         if (deleg_stateid != NULL) {
 898                 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
 899                 set_bit(NFS_DELEGATED_STATE, &state->flags);
 900         }
 901         if (open_stateid != NULL)
 902                 nfs_set_open_stateid_locked(state, open_stateid, fmode);
 903         write_sequnlock(&state->seqlock);
 904         spin_lock(&state->owner->so_lock);
 905         update_open_stateflags(state, fmode);
 906         spin_unlock(&state->owner->so_lock);
 907 }
 908
 909 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
 910 {
 911         struct nfs_inode *nfsi = NFS_I(state->inode);
 912         struct nfs_delegation *deleg_cur;
 913         int ret = 0;
 914
 915         fmode &= (FMODE_READ|FMODE_WRITE);
 916
 917         rcu_read_lock();
 918         deleg_cur = rcu_dereference(nfsi->delegation);
 919         if (deleg_cur == NULL)
 920                 goto no_delegation;
 921
 922         spin_lock(&deleg_cur->lock);
 923         if (nfsi->delegation != deleg_cur ||
 924             (deleg_cur->type & fmode) != fmode)
 925                 goto no_delegation_unlock;
 926
 927         if (delegation == NULL)
 928                 delegation = &deleg_cur->stateid;
 929         else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
 930                 goto no_delegation_unlock;
 931
 932         nfs_mark_delegation_referenced(deleg_cur);
 933         __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
 934         ret = 1;
 935 no_delegation_unlock:
 936         spin_unlock(&deleg_cur->lock);
 937 no_delegation:
 938         rcu_read_unlock();
 939
 940         if (!ret && open_stateid != NULL) {
 941                 __update_open_stateid(state, open_stateid, NULL, fmode);
 942                 ret = 1;
 943         }
 944
 945         return ret;
 946 }
 947
 948
 949 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
 950 {
 951         struct nfs_delegation *delegation;
 952
 953         rcu_read_lock();
 954         delegation = rcu_dereference(NFS_I(inode)->delegation);
 955         if (delegation == NULL || (delegation->type & fmode) == fmode) {
 956                 rcu_read_unlock();
 957                 return;
 958         }
 959         rcu_read_unlock();
 960         nfs_inode_return_delegation(inode);
 961 }
 962
 963 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
 964 {
 965         struct nfs4_state *state = opendata->state;
 966         struct nfs_inode *nfsi = NFS_I(state->inode);
 967         struct nfs_delegation *delegation;
 968         int open_mode = opendata->o_arg.open_flags & O_EXCL;
 969         fmode_t fmode = opendata->o_arg.fmode;
 970         nfs4_stateid stateid;
 971         int ret = -EAGAIN;
 972
 973         for (;;) {
 974                 if (can_open_cached(state, fmode, open_mode)) {
 975                         spin_lock(&state->owner->so_lock);
 976                         if (can_open_cached(state, fmode, open_mode)) {
 977                                 update_open_stateflags(state, fmode);
 978                                 spin_unlock(&state->owner->so_lock);
 979                                 goto out_return_state;
 980                         }
 981                         spin_unlock(&state->owner->so_lock);
 982                 }
 983                 rcu_read_lock();
 984                 delegation = rcu_dereference(nfsi->delegation);
 985                 if (delegation == NULL ||
 986                     !can_open_delegated(delegation, fmode)) {
 987                         rcu_read_unlock();
 988                         break;
 989                 }
 990                 /* Save the delegation */
 991                 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
 992                 rcu_read_unlock();
 993                 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
 994                 if (ret != 0)
 995                         goto out;
 996                 ret = -EAGAIN;
 997
 998                 /* Try to update the stateid using the delegation */
 999                 if (update_open_stateid(state, NULL, &stateid, fmode))
1000                         goto out_return_state;
1001         }
1002 out:
1003         return ERR_PTR(ret);
1004 out_return_state:
1005         atomic_inc(&state->count);
1006         return state;
1007 }
1008
1009 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1010 {
1011         struct inode *inode;
1012         struct nfs4_state *state = NULL;
1013         struct nfs_delegation *delegation;
1014         int ret;
1015
1016         if (!data->rpc_done) {
1017                 state = nfs4_try_open_cached(data);
1018                 goto out;
1019         }
1020
1021         ret = -EAGAIN;
1022         if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1023                 goto err;
1024         inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1025         ret = PTR_ERR(inode);
1026         if (IS_ERR(inode))
1027                 goto err;
1028         ret = -ENOMEM;
1029         state = nfs4_get_open_state(inode, data->owner);
1030         if (state == NULL)
1031                 goto err_put_inode;
1032         if (data->o_res.delegation_type != 0) {
1033                 int delegation_flags = 0;
1034
1035                 rcu_read_lock();
1036                 delegation = rcu_dereference(NFS_I(inode)->delegation);
1037                 if (delegation)
1038                         delegation_flags = delegation->flags;
1039                 rcu_read_unlock();
1040                 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1041                         nfs_inode_set_delegation(state->inode,
1042                                         data->owner->so_cred,
1043                                         &data->o_res);
1044                 else
1045                         nfs_inode_reclaim_delegation(state->inode,
1046                                         data->owner->so_cred,
1047                                         &data->o_res);
1048         }
1049
1050         update_open_stateid(state, &data->o_res.stateid, NULL,
1051                         data->o_arg.fmode);
1052         iput(inode);
1053 out:
1054         return state;
1055 err_put_inode:
1056         iput(inode);
1057 err:
1058         return ERR_PTR(ret);
1059 }
1060
1061 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1062 {
1063         struct nfs_inode *nfsi = NFS_I(state->inode);
1064         struct nfs_open_context *ctx;
1065
1066         spin_lock(&state->inode->i_lock);
1067         list_for_each_entry(ctx, &nfsi->open_files, list) {
1068                 if (ctx->state != state)
1069                         continue;
1070                 get_nfs_open_context(ctx);
1071                 spin_unlock(&state->inode->i_lock);
1072                 return ctx;
1073         }
1074         spin_unlock(&state->inode->i_lock);
1075         return ERR_PTR(-ENOENT);
1076 }
1077
1078 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1079 {
1080         struct nfs4_opendata *opendata;
1081
1082         opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1083         if (opendata == NULL)
1084                 return ERR_PTR(-ENOMEM);
1085         opendata->state = state;
1086         atomic_inc(&state->count);
1087         return opendata;
1088 }
1089
1090 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1091 {
1092         struct nfs4_state *newstate;
1093         int ret;
1094
1095         opendata->o_arg.open_flags = 0;
1096         opendata->o_arg.fmode = fmode;
1097         memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1098         memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1099         nfs4_init_opendata_res(opendata);
1100         ret = _nfs4_recover_proc_open(opendata);
1101         if (ret != 0)
1102                 return ret;
1103         newstate = nfs4_opendata_to_nfs4_state(opendata);
1104         if (IS_ERR(newstate))
1105                 return PTR_ERR(newstate);
1106         nfs4_close_state(&opendata->path, newstate, fmode);
1107         *res = newstate;
1108         return 0;
1109 }
1110
1111 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1112 {
1113         struct nfs4_state *newstate;
1114         int ret;
1115
1116         /* memory barrier prior to reading state->n_* */
1117         clear_bit(NFS_DELEGATED_STATE, &state->flags);
1118         smp_rmb();
1119         if (state->n_rdwr != 0) {
1120                 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1121                 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1122                 if (ret != 0)
1123                         return ret;
1124                 if (newstate != state)
1125                         return -ESTALE;
1126         }
1127         if (state->n_wronly != 0) {
1128                 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1129                 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1130                 if (ret != 0)
1131                         return ret;
1132                 if (newstate != state)
1133                         return -ESTALE;
1134         }
1135         if (state->n_rdonly != 0) {
1136                 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1137                 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1138                 if (ret != 0)
1139                         return ret;
1140                 if (newstate != state)
1141                         return -ESTALE;
1142         }
1143         /*
1144          * We may have performed cached opens for all three recoveries.
1145          * Check if we need to update the current stateid.
1146          */
1147         if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148             memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1149                 write_seqlock(&state->seqlock);
1150                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151                         memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1152                 write_sequnlock(&state->seqlock);
1153         }
1154         return 0;
1155 }
1156
1157 /*
1158  * OPEN_RECLAIM:
1159  *      reclaim state on the server after a reboot.
1160  */
1161 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1162 {
1163         struct nfs_delegation *delegation;
1164         struct nfs4_opendata *opendata;
1165         fmode_t delegation_type = 0;
1166         int status;
1167
1168         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169         if (IS_ERR(opendata))
1170                 return PTR_ERR(opendata);
1171         opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172         opendata->o_arg.fh = NFS_FH(state->inode);
1173         rcu_read_lock();
1174         delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1175         if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1176                 delegation_type = delegation->type;
1177         rcu_read_unlock();
1178         opendata->o_arg.u.delegation_type = delegation_type;
1179         status = nfs4_open_recover(opendata, state);
1180         nfs4_opendata_put(opendata);
1181         return status;
1182 }
1183
1184 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1185 {
1186         struct nfs_server *server = NFS_SERVER(state->inode);
1187         struct nfs4_exception exception = { };
1188         int err;
1189         do {
1190                 err = _nfs4_do_open_reclaim(ctx, state);
1191                 if (err != -NFS4ERR_DELAY)
1192                         break;
1193                 nfs4_handle_exception(server, err, &exception);
1194         } while (exception.retry);
1195         return err;
1196 }
1197
1198 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199 {
1200         struct nfs_open_context *ctx;
1201         int ret;
1202
1203         ctx = nfs4_state_find_open_context(state);
1204         if (IS_ERR(ctx))
1205                 return PTR_ERR(ctx);
1206         ret = nfs4_do_open_reclaim(ctx, state);
1207         put_nfs_open_context(ctx);
1208         return ret;
1209 }
1210
1211 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1212 {
1213         struct nfs4_opendata *opendata;
1214         int ret;
1215
1216         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217         if (IS_ERR(opendata))
1218                 return PTR_ERR(opendata);
1219         opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1220         memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1221                         sizeof(opendata->o_arg.u.delegation.data));
1222         ret = nfs4_open_recover(opendata, state);
1223         nfs4_opendata_put(opendata);
1224         return ret;
1225 }
1226
1227 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1228 {
1229         struct nfs4_exception exception = { };
1230         struct nfs_server *server = NFS_SERVER(state->inode);
1231         int err;
1232         do {
1233                 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1234                 switch (err) {
1235                         case 0:
1236                         case -ENOENT:
1237                         case -ESTALE:
1238                                 goto out;
1239                         case -NFS4ERR_BADSESSION:
1240                         case -NFS4ERR_BADSLOT:
1241                         case -NFS4ERR_BAD_HIGH_SLOT:
1242                         case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243                         case -NFS4ERR_DEADSESSION:
1244                                 nfs4_schedule_state_recovery(
1245                                         server->nfs_client);
1246                                 goto out;
1247                         case -NFS4ERR_STALE_CLIENTID:
1248                         case -NFS4ERR_STALE_STATEID:
1249                         case -NFS4ERR_EXPIRED:
1250                                 /* Don't recall a delegation if it was lost */
1251                                 nfs4_schedule_state_recovery(server->nfs_client);
1252                                 goto out;
1253                         case -ERESTARTSYS:
1254                                 /*
1255                                  * The show must go on: exit, but mark the
1256                                  * stateid as needing recovery.
1257                                  */
1258                         case -NFS4ERR_ADMIN_REVOKED:
1259                         case -NFS4ERR_BAD_STATEID:
1260                                 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1261                         case -EKEYEXPIRED:
1262                                 /*
1263                                  * User RPCSEC_GSS context has expired.
1264                                  * We cannot recover this stateid now, so
1265                                  * skip it and allow recovery thread to
1266                                  * proceed.
1267                                  */
1268                         case -ENOMEM:
1269                                 err = 0;
1270                                 goto out;
1271                 }
1272                 err = nfs4_handle_exception(server, err, &exception);
1273         } while (exception.retry);
1274 out:
1275         return err;
1276 }
1277
1278 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1279 {
1280         struct nfs4_opendata *data = calldata;
1281
1282         data->rpc_status = task->tk_status;
1283         if (data->rpc_status == 0) {
1284                 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1285                                 sizeof(data->o_res.stateid.data));
1286                 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1287                 renew_lease(data->o_res.server, data->timestamp);
1288                 data->rpc_done = 1;
1289         }
1290 }
1291
1292 static void nfs4_open_confirm_release(void *calldata)
1293 {
1294         struct nfs4_opendata *data = calldata;
1295         struct nfs4_state *state = NULL;
1296
1297         /* If this request hasn't been cancelled, do nothing */
1298         if (data->cancelled == 0)
1299                 goto out_free;
1300         /* In case of error, no cleanup! */
1301         if (!data->rpc_done)
1302                 goto out_free;
1303         state = nfs4_opendata_to_nfs4_state(data);
1304         if (!IS_ERR(state))
1305                 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1306 out_free:
1307         nfs4_opendata_put(data);
1308 }
1309
1310 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1311         .rpc_call_done = nfs4_open_confirm_done,
1312         .rpc_release = nfs4_open_confirm_release,
1313 };
1314
1315 /*
1316  * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1317  */
1318 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1319 {
1320         struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1321         struct rpc_task *task;
1322         struct  rpc_message msg = {
1323                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1324                 .rpc_argp = &data->c_arg,
1325                 .rpc_resp = &data->c_res,
1326                 .rpc_cred = data->owner->so_cred,
1327         };
1328         struct rpc_task_setup task_setup_data = {
1329                 .rpc_client = server->client,
1330                 .rpc_message = &msg,
1331                 .callback_ops = &nfs4_open_confirm_ops,
1332                 .callback_data = data,
1333                 .workqueue = nfsiod_workqueue,
1334                 .flags = RPC_TASK_ASYNC,
1335         };
1336         int status;
1337
1338         kref_get(&data->kref);
1339         data->rpc_done = 0;
1340         data->rpc_status = 0;
1341         data->timestamp = jiffies;
1342         task = rpc_run_task(&task_setup_data);
1343         if (IS_ERR(task))
1344                 return PTR_ERR(task);
1345         status = nfs4_wait_for_completion_rpc_task(task);
1346         if (status != 0) {
1347                 data->cancelled = 1;
1348                 smp_wmb();
1349         } else
1350                 status = data->rpc_status;
1351         rpc_put_task(task);
1352         return status;
1353 }
1354
1355 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1356 {
1357         struct nfs4_opendata *data = calldata;
1358         struct nfs4_state_owner *sp = data->owner;
1359
1360         if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1361                 return;
1362         /*
1363          * Check if we still need to send an OPEN call, or if we can use
1364          * a delegation instead.
1365          */
1366         if (data->state != NULL) {
1367                 struct nfs_delegation *delegation;
1368
1369                 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1370                         goto out_no_action;
1371                 rcu_read_lock();
1372                 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1373                 if (delegation != NULL &&
1374                     test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1375                         rcu_read_unlock();
1376                         goto out_no_action;
1377                 }
1378                 rcu_read_unlock();
1379         }
1380         /* Update sequence id. */
1381         data->o_arg.id = sp->so_owner_id.id;
1382         data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1383         if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1384                 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1385                 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1386         }
1387         data->timestamp = jiffies;
1388         if (nfs4_setup_sequence(data->o_arg.server,
1389                                 &data->o_arg.seq_args,
1390                                 &data->o_res.seq_res, 1, task))
1391                 return;
1392         rpc_call_start(task);
1393         return;
1394 out_no_action:
1395         task->tk_action = NULL;
1396
1397 }
1398
1399 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1400 {
1401         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1402         nfs4_open_prepare(task, calldata);
1403 }
1404
1405 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1406 {
1407         struct nfs4_opendata *data = calldata;
1408
1409         data->rpc_status = task->tk_status;
1410
1411         if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1412                 return;
1413
1414         if (task->tk_status == 0) {
1415                 switch (data->o_res.f_attr->mode & S_IFMT) {
1416                         case S_IFREG:
1417                                 break;
1418                         case S_IFLNK:
1419                                 data->rpc_status = -ELOOP;
1420                                 break;
1421                         case S_IFDIR:
1422                                 data->rpc_status = -EISDIR;
1423                                 break;
1424                         default:
1425                                 data->rpc_status = -ENOTDIR;
1426                 }
1427                 renew_lease(data->o_res.server, data->timestamp);
1428                 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1429                         nfs_confirm_seqid(&data->owner->so_seqid, 0);
1430         }
1431         data->rpc_done = 1;
1432 }
1433
1434 static void nfs4_open_release(void *calldata)
1435 {
1436         struct nfs4_opendata *data = calldata;
1437         struct nfs4_state *state = NULL;
1438
1439         /* If this request hasn't been cancelled, do nothing */
1440         if (data->cancelled == 0)
1441                 goto out_free;
1442         /* In case of error, no cleanup! */
1443         if (data->rpc_status != 0 || !data->rpc_done)
1444                 goto out_free;
1445         /* In case we need an open_confirm, no cleanup! */
1446         if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1447                 goto out_free;
1448         state = nfs4_opendata_to_nfs4_state(data);
1449         if (!IS_ERR(state))
1450                 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1451 out_free:
1452         nfs4_opendata_put(data);
1453 }
1454
1455 static const struct rpc_call_ops nfs4_open_ops = {
1456         .rpc_call_prepare = nfs4_open_prepare,
1457         .rpc_call_done = nfs4_open_done,
1458         .rpc_release = nfs4_open_release,
1459 };
1460
1461 static const struct rpc_call_ops nfs4_recover_open_ops = {
1462         .rpc_call_prepare = nfs4_recover_open_prepare,
1463         .rpc_call_done = nfs4_open_done,
1464         .rpc_release = nfs4_open_release,
1465 };
1466
1467 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1468 {
1469         struct inode *dir = data->dir->d_inode;
1470         struct nfs_server *server = NFS_SERVER(dir);
1471         struct nfs_openargs *o_arg = &data->o_arg;
1472         struct nfs_openres *o_res = &data->o_res;
1473         struct rpc_task *task;
1474         struct rpc_message msg = {
1475                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1476                 .rpc_argp = o_arg,
1477                 .rpc_resp = o_res,
1478                 .rpc_cred = data->owner->so_cred,
1479         };
1480         struct rpc_task_setup task_setup_data = {
1481                 .rpc_client = server->client,
1482                 .rpc_message = &msg,
1483                 .callback_ops = &nfs4_open_ops,
1484                 .callback_data = data,
1485                 .workqueue = nfsiod_workqueue,
1486                 .flags = RPC_TASK_ASYNC,
1487         };
1488         int status;
1489
1490         kref_get(&data->kref);
1491         data->rpc_done = 0;
1492         data->rpc_status = 0;
1493         data->cancelled = 0;
1494         if (isrecover)
1495                 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1496         task = rpc_run_task(&task_setup_data);
1497         if (IS_ERR(task))
1498                 return PTR_ERR(task);
1499         status = nfs4_wait_for_completion_rpc_task(task);
1500         if (status != 0) {
1501                 data->cancelled = 1;
1502                 smp_wmb();
1503         } else
1504                 status = data->rpc_status;
1505         rpc_put_task(task);
1506
1507         return status;
1508 }
1509
1510 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1511 {
1512         struct inode *dir = data->dir->d_inode;
1513         struct nfs_openres *o_res = &data->o_res;
1514         int status;
1515
1516         status = nfs4_run_open_task(data, 1);
1517         if (status != 0 || !data->rpc_done)
1518                 return status;
1519
1520         nfs_refresh_inode(dir, o_res->dir_attr);
1521
1522         if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1523                 status = _nfs4_proc_open_confirm(data);
1524                 if (status != 0)
1525                         return status;
1526         }
1527
1528         return status;
1529 }
1530
1531 /*
1532  * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1533  */
1534 static int _nfs4_proc_open(struct nfs4_opendata *data)
1535 {
1536         struct inode *dir = data->dir->d_inode;
1537         struct nfs_server *server = NFS_SERVER(dir);
1538         struct nfs_openargs *o_arg = &data->o_arg;
1539         struct nfs_openres *o_res = &data->o_res;
1540         int status;
1541
1542         status = nfs4_run_open_task(data, 0);
1543         if (status != 0 || !data->rpc_done)
1544                 return status;
1545
1546         if (o_arg->open_flags & O_CREAT) {
1547                 update_changeattr(dir, &o_res->cinfo);
1548                 nfs_post_op_update_inode(dir, o_res->dir_attr);
1549         } else
1550                 nfs_refresh_inode(dir, o_res->dir_attr);
1551         if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1552                 server->caps &= ~NFS_CAP_POSIX_LOCK;
1553         if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1554                 status = _nfs4_proc_open_confirm(data);
1555                 if (status != 0)
1556                         return status;
1557         }
1558         if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1559                 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1560         return 0;
1561 }
1562
1563 static int nfs4_recover_expired_lease(struct nfs_server *server)
1564 {
1565         struct nfs_client *clp = server->nfs_client;
1566         unsigned int loop;
1567         int ret;
1568
1569         for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1570                 ret = nfs4_wait_clnt_recover(clp);
1571                 if (ret != 0)
1572                         break;
1573                 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1574                     !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1575                         break;
1576                 nfs4_schedule_state_recovery(clp);
1577                 ret = -EIO;
1578         }
1579         return ret;
1580 }
1581
1582 /*
1583  * OPEN_EXPIRED:
1584  *      reclaim state on the server after a network partition.
1585  *      Assumes caller holds the appropriate lock
1586  */
1587 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1588 {
1589         struct nfs4_opendata *opendata;
1590         int ret;
1591
1592         opendata = nfs4_open_recoverdata_alloc(ctx, state);
1593         if (IS_ERR(opendata))
1594                 return PTR_ERR(opendata);
1595         ret = nfs4_open_recover(opendata, state);
1596         if (ret == -ESTALE)
1597                 d_drop(ctx->path.dentry);
1598         nfs4_opendata_put(opendata);
1599         return ret;
1600 }
1601
1602 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1603 {
1604         struct nfs_server *server = NFS_SERVER(state->inode);
1605         struct nfs4_exception exception = { };
1606         int err;
1607
1608         do {
1609                 err = _nfs4_open_expired(ctx, state);
1610                 switch (err) {
1611                 default:
1612                         goto out;
1613                 case -NFS4ERR_GRACE:
1614                 case -NFS4ERR_DELAY:
1615                         nfs4_handle_exception(server, err, &exception);
1616                         err = 0;
1617                 }
1618         } while (exception.retry);
1619 out:
1620         return err;
1621 }
1622
1623 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1624 {
1625         struct nfs_open_context *ctx;
1626         int ret;
1627
1628         ctx = nfs4_state_find_open_context(state);
1629         if (IS_ERR(ctx))
1630                 return PTR_ERR(ctx);
1631         ret = nfs4_do_open_expired(ctx, state);
1632         put_nfs_open_context(ctx);
1633         return ret;
1634 }
1635
1636 /*
1637  * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1638  * fields corresponding to attributes that were used to store the verifier.
1639  * Make sure we clobber those fields in the later setattr call
1640  */
1641 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1642 {
1643         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1644             !(sattr->ia_valid & ATTR_ATIME_SET))
1645                 sattr->ia_valid |= ATTR_ATIME;
1646
1647         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1648             !(sattr->ia_valid & ATTR_MTIME_SET))
1649                 sattr->ia_valid |= ATTR_MTIME;
1650 }
1651
1652 /*
1653  * Returns a referenced nfs4_state
1654  */
1655 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)
1656 {
1657         struct nfs4_state_owner  *sp;
1658         struct nfs4_state     *state = NULL;
1659         struct nfs_server       *server = NFS_SERVER(dir);
1660         struct nfs4_opendata *opendata;
1661         int status;
1662
1663         /* Protect against reboot recovery conflicts */
1664         status = -ENOMEM;
1665         if (!(sp = nfs4_get_state_owner(server, cred))) {
1666                 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1667                 goto out_err;
1668         }
1669         status = nfs4_recover_expired_lease(server);
1670         if (status != 0)
1671                 goto err_put_state_owner;
1672         if (path->dentry->d_inode != NULL)
1673                 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1674         status = -ENOMEM;
1675         opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1676         if (opendata == NULL)
1677                 goto err_put_state_owner;
1678
1679         if (path->dentry->d_inode != NULL)
1680                 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1681
1682         status = _nfs4_proc_open(opendata);
1683         if (status != 0)
1684                 goto err_opendata_put;
1685
1686         state = nfs4_opendata_to_nfs4_state(opendata);
1687         status = PTR_ERR(state);
1688         if (IS_ERR(state))
1689                 goto err_opendata_put;
1690         if (server->caps & NFS_CAP_POSIX_LOCK)
1691                 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1692
1693         if (opendata->o_arg.open_flags & O_EXCL) {
1694                 nfs4_exclusive_attrset(opendata, sattr);
1695
1696                 nfs_fattr_init(opendata->o_res.f_attr);
1697                 status = nfs4_do_setattr(state->inode, cred,
1698                                 opendata->o_res.f_attr, sattr,
1699                                 state);
1700                 if (status == 0)
1701                         nfs_setattr_update_inode(state->inode, sattr);
1702                 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1703         }
1704         nfs4_opendata_put(opendata);
1705         nfs4_put_state_owner(sp);
1706         *res = state;
1707         return 0;
1708 err_opendata_put:
1709         nfs4_opendata_put(opendata);
1710 err_put_state_owner:
1711         nfs4_put_state_owner(sp);
1712 out_err:
1713         *res = NULL;
1714         return status;
1715 }
1716
1717
1718 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)
1719 {
1720         struct nfs4_exception exception = { };
1721         struct nfs4_state *res;
1722         int status;
1723
1724         do {
1725                 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1726                 if (status == 0)
1727                         break;
1728                 /* NOTE: BAD_SEQID means the server and client disagree about the
1729                  * book-keeping w.r.t. state-changing operations
1730                  * (OPEN/CLOSE/LOCK/LOCKU...)
1731                  * It is actually a sign of a bug on the client or on the server.
1732                  *
1733                  * If we receive a BAD_SEQID error in the particular case of
1734                  * doing an OPEN, we assume that nfs_increment_open_seqid() will
1735                  * have unhashed the old state_owner for us, and that we can
1736                  * therefore safely retry using a new one. We should still warn
1737                  * the user though...
1738                  */
1739                 if (status == -NFS4ERR_BAD_SEQID) {
1740                         printk(KERN_WARNING "NFS: v4 server %s "
1741                                         " returned a bad sequence-id error!\n",
1742                                         NFS_SERVER(dir)->nfs_client->cl_hostname);
1743                         exception.retry = 1;
1744                         continue;
1745                 }
1746                 /*
1747                  * BAD_STATEID on OPEN means that the server cancelled our
1748                  * state before it received the OPEN_CONFIRM.
1749                  * Recover by retrying the request as per the discussion
1750                  * on Page 181 of RFC3530.
1751                  */
1752                 if (status == -NFS4ERR_BAD_STATEID) {
1753                         exception.retry = 1;
1754                         continue;
1755                 }
1756                 if (status == -EAGAIN) {
1757                         /* We must have found a delegation */
1758                         exception.retry = 1;
1759                         continue;
1760                 }
1761                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1762                                         status, &exception));
1763         } while (exception.retry);
1764         return res;
1765 }
1766
1767 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1768                             struct nfs_fattr *fattr, struct iattr *sattr,
1769                             struct nfs4_state *state)
1770 {
1771         struct nfs_server *server = NFS_SERVER(inode);
1772         struct nfs_setattrargs  arg = {
1773                 .fh             = NFS_FH(inode),
1774                 .iap            = sattr,
1775                 .server         = server,
1776                 .bitmask = server->attr_bitmask,
1777         };
1778         struct nfs_setattrres  res = {
1779                 .fattr          = fattr,
1780                 .server         = server,
1781         };
1782         struct rpc_message msg = {
1783                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1784                 .rpc_argp       = &arg,
1785                 .rpc_resp       = &res,
1786                 .rpc_cred       = cred,
1787         };
1788         unsigned long timestamp = jiffies;
1789         int status;
1790
1791         nfs_fattr_init(fattr);
1792
1793         if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1794                 /* Use that stateid */
1795         } else if (state != NULL) {
1796                 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1797         } else
1798                 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1799
1800         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1801         if (status == 0 && state != NULL)
1802                 renew_lease(server, timestamp);
1803         return status;
1804 }
1805
1806 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1807                            struct nfs_fattr *fattr, struct iattr *sattr,
1808                            struct nfs4_state *state)
1809 {
1810         struct nfs_server *server = NFS_SERVER(inode);
1811         struct nfs4_exception exception = { };
1812         int err;
1813         do {
1814                 err = nfs4_handle_exception(server,
1815                                 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1816                                 &exception);
1817         } while (exception.retry);
1818         return err;
1819 }
1820
1821 struct nfs4_closedata {
1822         struct path path;
1823         struct inode *inode;
1824         struct nfs4_state *state;
1825         struct nfs_closeargs arg;
1826         struct nfs_closeres res;
1827         struct nfs_fattr fattr;
1828         unsigned long timestamp;
1829 };
1830
1831 static void nfs4_free_closedata(void *data)
1832 {
1833         struct nfs4_closedata *calldata = data;
1834         struct nfs4_state_owner *sp = calldata->state->owner;
1835
1836         nfs4_put_open_state(calldata->state);
1837         nfs_free_seqid(calldata->arg.seqid);
1838         nfs4_put_state_owner(sp);
1839         path_put(&calldata->path);
1840         kfree(calldata);
1841 }
1842
1843 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1844                 fmode_t fmode)
1845 {
1846         spin_lock(&state->owner->so_lock);
1847         if (!(fmode & FMODE_READ))
1848                 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1849         if (!(fmode & FMODE_WRITE))
1850                 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1851         clear_bit(NFS_O_RDWR_STATE, &state->flags);
1852         spin_unlock(&state->owner->so_lock);
1853 }
1854
1855 static void nfs4_close_done(struct rpc_task *task, void *data)
1856 {
1857         struct nfs4_closedata *calldata = data;
1858         struct nfs4_state *state = calldata->state;
1859         struct nfs_server *server = NFS_SERVER(calldata->inode);
1860
1861         if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1862                 return;
1863         /* hmm. we are done with the inode, and in the process of freeing
1864          * the state_owner. we keep this around to process errors
1865          */
1866         switch (task->tk_status) {
1867                 case 0:
1868                         nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1869                         renew_lease(server, calldata->timestamp);
1870                         nfs4_close_clear_stateid_flags(state,
1871                                         calldata->arg.fmode);
1872                         break;
1873                 case -NFS4ERR_STALE_STATEID:
1874                 case -NFS4ERR_OLD_STATEID:
1875                 case -NFS4ERR_BAD_STATEID:
1876                 case -NFS4ERR_EXPIRED:
1877                         if (calldata->arg.fmode == 0)
1878                                 break;
1879                 default:
1880                         if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1881                                 rpc_restart_call_prepare(task);
1882         }
1883         nfs_release_seqid(calldata->arg.seqid);
1884         nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1885 }
1886
1887 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1888 {
1889         struct nfs4_closedata *calldata = data;
1890         struct nfs4_state *state = calldata->state;
1891         int call_close = 0;
1892
1893         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1894                 return;
1895
1896         task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1897         calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1898         spin_lock(&state->owner->so_lock);
1899         /* Calculate the change in open mode */
1900         if (state->n_rdwr == 0) {
1901                 if (state->n_rdonly == 0) {
1902                         call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1903                         call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1904                         calldata->arg.fmode &= ~FMODE_READ;
1905                 }
1906                 if (state->n_wronly == 0) {
1907                         call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1908                         call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1909                         calldata->arg.fmode &= ~FMODE_WRITE;
1910                 }
1911         }
1912         spin_unlock(&state->owner->so_lock);
1913
1914         if (!call_close) {
1915                 /* Note: exit _without_ calling nfs4_close_done */
1916                 task->tk_action = NULL;
1917                 return;
1918         }
1919
1920         if (calldata->arg.fmode == 0)
1921                 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1922
1923         nfs_fattr_init(calldata->res.fattr);
1924         calldata->timestamp = jiffies;
1925         if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1926                                 &calldata->arg.seq_args, &calldata->res.seq_res,
1927                                 1, task))
1928                 return;
1929         rpc_call_start(task);
1930 }
1931
1932 static const struct rpc_call_ops nfs4_close_ops = {
1933         .rpc_call_prepare = nfs4_close_prepare,
1934         .rpc_call_done = nfs4_close_done,
1935         .rpc_release = nfs4_free_closedata,
1936 };
1937
1938 /*
1939  * It is possible for data to be read/written from a mem-mapped file
1940  * after the sys_close call (which hits the vfs layer as a flush).
1941  * This means that we can't safely call nfsv4 close on a file until
1942  * the inode is cleared. This in turn means that we are not good
1943  * NFSv4 citizens - we do not indicate to the server to update the file's
1944  * share state even when we are done with one of the three share
1945  * stateid's in the inode.
1946  *
1947  * NOTE: Caller must be holding the sp->so_owner semaphore!
1948  */
1949 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1950 {
1951         struct nfs_server *server = NFS_SERVER(state->inode);
1952         struct nfs4_closedata *calldata;
1953         struct nfs4_state_owner *sp = state->owner;
1954         struct rpc_task *task;
1955         struct rpc_message msg = {
1956                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1957                 .rpc_cred = state->owner->so_cred,
1958         };
1959         struct rpc_task_setup task_setup_data = {
1960                 .rpc_client = server->client,
1961                 .rpc_message = &msg,
1962                 .callback_ops = &nfs4_close_ops,
1963                 .workqueue = nfsiod_workqueue,
1964                 .flags = RPC_TASK_ASYNC,
1965         };
1966         int status = -ENOMEM;
1967
1968         calldata = kzalloc(sizeof(*calldata), gfp_mask);
1969         if (calldata == NULL)
1970                 goto out;
1971         calldata->inode = state->inode;
1972         calldata->state = state;
1973         calldata->arg.fh = NFS_FH(state->inode);
1974         calldata->arg.stateid = &state->open_stateid;
1975         /* Serialization for the sequence id */
1976         calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
1977         if (calldata->arg.seqid == NULL)
1978                 goto out_free_calldata;
1979         calldata->arg.fmode = 0;
1980         calldata->arg.bitmask = server->cache_consistency_bitmask;
1981         calldata->res.fattr = &calldata->fattr;
1982         calldata->res.seqid = calldata->arg.seqid;
1983         calldata->res.server = server;
1984         path_get(path);
1985         calldata->path = *path;
1986
1987         msg.rpc_argp = &calldata->arg;
1988         msg.rpc_resp = &calldata->res;
1989         task_setup_data.callback_data = calldata;
1990         task = rpc_run_task(&task_setup_data);
1991         if (IS_ERR(task))
1992                 return PTR_ERR(task);
1993         status = 0;
1994         if (wait)
1995                 status = rpc_wait_for_completion_task(task);
1996         rpc_put_task(task);
1997         return status;
1998 out_free_calldata:
1999         kfree(calldata);
2000 out:
2001         nfs4_put_open_state(state);
2002         nfs4_put_state_owner(sp);
2003         return status;
2004 }
2005
2006 static struct inode *
2007 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2008 {
2009         struct nfs4_state *state;
2010
2011         /* Protect against concurrent sillydeletes */
2012         state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2013         if (IS_ERR(state))
2014                 return ERR_CAST(state);
2015         ctx->state = state;
2016         return igrab(state->inode);
2017 }
2018
2019 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2020 {
2021         if (ctx->state == NULL)
2022                 return;
2023         if (is_sync)
2024                 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2025         else
2026                 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2027 }
2028
2029 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2030 {
2031         struct nfs4_server_caps_arg args = {
2032                 .fhandle = fhandle,
2033         };
2034         struct nfs4_server_caps_res res = {};
2035         struct rpc_message msg = {
2036                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2037                 .rpc_argp = &args,
2038                 .rpc_resp = &res,
2039         };
2040         int status;
2041
2042         status = nfs4_call_sync(server, &msg, &args, &res, 0);
2043         if (status == 0) {
2044                 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2045                 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2046                                 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2047                                 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2048                                 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2049                                 NFS_CAP_CTIME|NFS_CAP_MTIME);
2050                 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2051                         server->caps |= NFS_CAP_ACLS;
2052                 if (res.has_links != 0)
2053                         server->caps |= NFS_CAP_HARDLINKS;
2054                 if (res.has_symlinks != 0)
2055                         server->caps |= NFS_CAP_SYMLINKS;
2056                 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2057                         server->caps |= NFS_CAP_FILEID;
2058                 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2059                         server->caps |= NFS_CAP_MODE;
2060                 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2061                         server->caps |= NFS_CAP_NLINK;
2062                 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2063                         server->caps |= NFS_CAP_OWNER;
2064                 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2065                         server->caps |= NFS_CAP_OWNER_GROUP;
2066                 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2067                         server->caps |= NFS_CAP_ATIME;
2068                 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2069                         server->caps |= NFS_CAP_CTIME;
2070                 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2071                         server->caps |= NFS_CAP_MTIME;
2072
2073                 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2074                 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2075                 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2076                 server->acl_bitmask = res.acl_bitmask;
2077         }
2078
2079         return status;
2080 }
2081
2082 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2083 {
2084         struct nfs4_exception exception = { };
2085         int err;
2086         do {
2087                 err = nfs4_handle_exception(server,
2088                                 _nfs4_server_capabilities(server, fhandle),
2089                                 &exception);
2090         } while (exception.retry);
2091         return err;
2092 }
2093
2094 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2095                 struct nfs_fsinfo *info)
2096 {
2097         struct nfs4_lookup_root_arg args = {
2098                 .bitmask = nfs4_fattr_bitmap,
2099         };
2100         struct nfs4_lookup_res res = {
2101                 .server = server,
2102                 .fattr = info->fattr,
2103                 .fh = fhandle,
2104         };
2105         struct rpc_message msg = {
2106                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2107                 .rpc_argp = &args,
2108                 .rpc_resp = &res,
2109         };
2110
2111         nfs_fattr_init(info->fattr);
2112         return nfs4_call_sync(server, &msg, &args, &res, 0);
2113 }
2114
2115 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2116                 struct nfs_fsinfo *info)
2117 {
2118         struct nfs4_exception exception = { };
2119         int err;
2120         do {
2121                 err = nfs4_handle_exception(server,
2122                                 _nfs4_lookup_root(server, fhandle, info),
2123                                 &exception);
2124         } while (exception.retry);
2125         return err;
2126 }
2127
2128 /*
2129  * get the file handle for the "/" directory on the server
2130  */
2131 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2132                               struct nfs_fsinfo *info)
2133 {
2134         int status;
2135
2136         status = nfs4_lookup_root(server, fhandle, info);
2137         if (status == 0)
2138                 status = nfs4_server_capabilities(server, fhandle);
2139         if (status == 0)
2140                 status = nfs4_do_fsinfo(server, fhandle, info);
2141         return nfs4_map_errors(status);
2142 }
2143
2144 /*
2145  * Get locations and (maybe) other attributes of a referral.
2146  * Note that we'll actually follow the referral later when
2147  * we detect fsid mismatch in inode revalidation
2148  */
2149 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2150 {
2151         int status = -ENOMEM;
2152         struct page *page = NULL;
2153         struct nfs4_fs_locations *locations = NULL;
2154
2155         page = alloc_page(GFP_KERNEL);
2156         if (page == NULL)
2157                 goto out;
2158         locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2159         if (locations == NULL)
2160                 goto out;
2161
2162         status = nfs4_proc_fs_locations(dir, name, locations, page);
2163         if (status != 0)
2164                 goto out;
2165         /* Make sure server returned a different fsid for the referral */
2166         if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2167                 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2168                 status = -EIO;
2169                 goto out;
2170         }
2171
2172         memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2173         fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2174         if (!fattr->mode)
2175                 fattr->mode = S_IFDIR;
2176         memset(fhandle, 0, sizeof(struct nfs_fh));
2177 out:
2178         if (page)
2179                 __free_page(page);
2180         kfree(locations);
2181         return status;
2182 }
2183
2184 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2185 {
2186         struct nfs4_getattr_arg args = {
2187                 .fh = fhandle,
2188                 .bitmask = server->attr_bitmask,
2189         };
2190         struct nfs4_getattr_res res = {
2191                 .fattr = fattr,
2192                 .server = server,
2193         };
2194         struct rpc_message msg = {
2195                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2196                 .rpc_argp = &args,
2197                 .rpc_resp = &res,
2198         };
2199
2200         nfs_fattr_init(fattr);
2201         return nfs4_call_sync(server, &msg, &args, &res, 0);
2202 }
2203
2204 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2205 {
2206         struct nfs4_exception exception = { };
2207         int err;
2208         do {
2209                 err = nfs4_handle_exception(server,
2210                                 _nfs4_proc_getattr(server, fhandle, fattr),
2211                                 &exception);
2212         } while (exception.retry);
2213         return err;
2214 }
2215
2216 /*
2217  * The file is not closed if it is opened due to the a request to change
2218  * the size of the file. The open call will not be needed once the
2219  * VFS layer lookup-intents are implemented.
2220  *
2221  * Close is called when the inode is destroyed.
2222  * If we haven't opened the file for O_WRONLY, we
2223  * need to in the size_change case to obtain a stateid.
2224  *
2225  * Got race?
2226  * Because OPEN is always done by name in nfsv4, it is
2227  * possible that we opened a different file by the same
2228  * name.  We can recognize this race condition, but we
2229  * can't do anything about it besides returning an error.
2230  *
2231  * This will be fixed with VFS changes (lookup-intent).
2232  */
2233 static int
2234 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2235                   struct iattr *sattr)
2236 {
2237         struct inode *inode = dentry->d_inode;
2238         struct rpc_cred *cred = NULL;
2239         struct nfs4_state *state = NULL;
2240         int status;
2241
2242         nfs_fattr_init(fattr);
2243
2244         /* Search for an existing open(O_WRITE) file */
2245         if (sattr->ia_valid & ATTR_FILE) {
2246                 struct nfs_open_context *ctx;
2247
2248                 ctx = nfs_file_open_context(sattr->ia_file);
2249                 if (ctx) {
2250                         cred = ctx->cred;
2251                         state = ctx->state;
2252                 }
2253         }
2254
2255         status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2256         if (status == 0)
2257                 nfs_setattr_update_inode(inode, sattr);
2258         return status;
2259 }
2260
2261 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2262                 const struct qstr *name, struct nfs_fh *fhandle,
2263                 struct nfs_fattr *fattr)
2264 {
2265         int                    status;
2266         struct nfs4_lookup_arg args = {
2267                 .bitmask = server->attr_bitmask,
2268                 .dir_fh = dirfh,
2269                 .name = name,
2270         };
2271         struct nfs4_lookup_res res = {
2272                 .server = server,
2273                 .fattr = fattr,
2274                 .fh = fhandle,
2275         };
2276         struct rpc_message msg = {
2277                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2278                 .rpc_argp = &args,
2279                 .rpc_resp = &res,
2280         };
2281
2282         nfs_fattr_init(fattr);
2283
2284         dprintk("NFS call  lookupfh %s\n", name->name);
2285         status = nfs4_call_sync(server, &msg, &args, &res, 0);
2286         dprintk("NFS reply lookupfh: %d\n", status);
2287         return status;
2288 }
2289
2290 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2291                               struct qstr *name, struct nfs_fh *fhandle,
2292                               struct nfs_fattr *fattr)
2293 {
2294         struct nfs4_exception exception = { };
2295         int err;
2296         do {
2297                 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2298                 /* FIXME: !!!! */
2299                 if (err == -NFS4ERR_MOVED) {
2300                         err = -EREMOTE;
2301                         break;
2302                 }
2303                 err = nfs4_handle_exception(server, err, &exception);
2304         } while (exception.retry);
2305         return err;
2306 }
2307
2308 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2309                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2310 {
2311         int status;
2312
2313         dprintk("NFS call  lookup %s\n", name->name);
2314         status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2315         if (status == -NFS4ERR_MOVED)
2316                 status = nfs4_get_referral(dir, name, fattr, fhandle);
2317         dprintk("NFS reply lookup: %d\n", status);
2318         return status;
2319 }
2320
2321 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2322 {
2323         struct nfs4_exception exception = { };
2324         int err;
2325         do {
2326                 err = nfs4_handle_exception(NFS_SERVER(dir),
2327                                 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2328                                 &exception);
2329         } while (exception.retry);
2330         return err;
2331 }
2332
2333 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2334 {
2335         struct nfs_server *server = NFS_SERVER(inode);
2336         struct nfs4_accessargs args = {
2337                 .fh = NFS_FH(inode),
2338                 .bitmask = server->attr_bitmask,
2339         };
2340         struct nfs4_accessres res = {
2341                 .server = server,
2342         };
2343         struct rpc_message msg = {
2344                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2345                 .rpc_argp = &args,
2346                 .rpc_resp = &res,
2347                 .rpc_cred = entry->cred,
2348         };
2349         int mode = entry->mask;
2350         int status;
2351
2352         /*
2353          * Determine which access bits we want to ask for...
2354          */
2355         if (mode & MAY_READ)
2356                 args.access |= NFS4_ACCESS_READ;
2357         if (S_ISDIR(inode->i_mode)) {
2358                 if (mode & MAY_WRITE)
2359                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2360                 if (mode & MAY_EXEC)
2361                         args.access |= NFS4_ACCESS_LOOKUP;
2362         } else {
2363                 if (mode & MAY_WRITE)
2364                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2365                 if (mode & MAY_EXEC)
2366                         args.access |= NFS4_ACCESS_EXECUTE;
2367         }
2368
2369         res.fattr = nfs_alloc_fattr();
2370         if (res.fattr == NULL)
2371                 return -ENOMEM;
2372
2373         status = nfs4_call_sync(server, &msg, &args, &res, 0);
2374         if (!status) {
2375                 entry->mask = 0;
2376                 if (res.access & NFS4_ACCESS_READ)
2377                         entry->mask |= MAY_READ;
2378                 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2379                         entry->mask |= MAY_WRITE;
2380                 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2381                         entry->mask |= MAY_EXEC;
2382                 nfs_refresh_inode(inode, res.fattr);
2383         }
2384         nfs_free_fattr(res.fattr);
2385         return status;
2386 }
2387
2388 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2389 {
2390         struct nfs4_exception exception = { };
2391         int err;
2392         do {
2393                 err = nfs4_handle_exception(NFS_SERVER(inode),
2394                                 _nfs4_proc_access(inode, entry),
2395                                 &exception);
2396         } while (exception.retry);
2397         return err;
2398 }
2399
2400 /*
2401  * TODO: For the time being, we don't try to get any attributes
2402  * along with any of the zero-copy operations READ, READDIR,
2403  * READLINK, WRITE.
2404  *
2405  * In the case of the first three, we want to put the GETATTR
2406  * after the read-type operation -- this is because it is hard
2407  * to predict the length of a GETATTR response in v4, and thus
2408  * align the READ data correctly.  This means that the GETATTR
2409  * may end up partially falling into the page cache, and we should
2410  * shift it into the 'tail' of the xdr_buf before processing.
2411  * To do this efficiently, we need to know the total length
2412  * of data received, which doesn't seem to be available outside
2413  * of the RPC layer.
2414  *
2415  * In the case of WRITE, we also want to put the GETATTR after
2416  * the operation -- in this case because we want to make sure
2417  * we get the post-operation mtime and size.  This means that
2418  * we can't use xdr_encode_pages() as written: we need a variant
2419  * of it which would leave room in the 'tail' iovec.
2420  *
2421  * Both of these changes to the XDR layer would in fact be quite
2422  * minor, but I decided to leave them for a subsequent patch.
2423  */
2424 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2425                 unsigned int pgbase, unsigned int pglen)
2426 {
2427         struct nfs4_readlink args = {
2428                 .fh       = NFS_FH(inode),
2429                 .pgbase   = pgbase,
2430                 .pglen    = pglen,
2431                 .pages    = &page,
2432         };
2433         struct nfs4_readlink_res res;
2434         struct rpc_message msg = {
2435                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2436                 .rpc_argp = &args,
2437                 .rpc_resp = &res,
2438         };
2439
2440         return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2441 }
2442
2443 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2444                 unsigned int pgbase, unsigned int pglen)
2445 {
2446         struct nfs4_exception exception = { };
2447         int err;
2448         do {
2449                 err = nfs4_handle_exception(NFS_SERVER(inode),
2450                                 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2451                                 &exception);
2452         } while (exception.retry);
2453         return err;
2454 }
2455
2456 /*
2457  * Got race?
2458  * We will need to arrange for the VFS layer to provide an atomic open.
2459  * Until then, this create/open method is prone to inefficiency and race
2460  * conditions due to the lookup, create, and open VFS calls from sys_open()
2461  * placed on the wire.
2462  *
2463  * Given the above sorry state of affairs, I'm simply sending an OPEN.
2464  * The file will be opened again in the subsequent VFS open call
2465  * (nfs4_proc_file_open).
2466  *
2467  * The open for read will just hang around to be used by any process that
2468  * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2469  */
2470
2471 static int
2472 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2473                  int flags, struct nfs_open_context *ctx)
2474 {
2475         struct path my_path = {
2476                 .dentry = dentry,
2477         };
2478         struct path *path = &my_path;
2479         struct nfs4_state *state;
2480         struct rpc_cred *cred = NULL;
2481         fmode_t fmode = 0;
2482         int status = 0;
2483
2484         if (ctx != NULL) {
2485                 cred = ctx->cred;
2486                 path = &ctx->path;
2487                 fmode = ctx->mode;
2488         }
2489         state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2490         d_drop(dentry);
2491         if (IS_ERR(state)) {
2492                 status = PTR_ERR(state);
2493                 goto out;
2494         }
2495         d_add(dentry, igrab(state->inode));
2496         nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2497         if (ctx != NULL)
2498                 ctx->state = state;
2499         else
2500                 nfs4_close_sync(path, state, fmode);
2501 out:
2502         return status;
2503 }
2504
2505 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2506 {
2507         struct nfs_server *server = NFS_SERVER(dir);
2508         struct nfs_removeargs args = {
2509                 .fh = NFS_FH(dir),
2510                 .name.len = name->len,
2511                 .name.name = name->name,
2512                 .bitmask = server->attr_bitmask,
2513         };
2514         struct nfs_removeres res = {
2515                 .server = server,
2516         };
2517         struct rpc_message msg = {
2518                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2519                 .rpc_argp = &args,
2520                 .rpc_resp = &res,
2521         };
2522         int status = -ENOMEM;
2523
2524         res.dir_attr = nfs_alloc_fattr();
2525         if (res.dir_attr == NULL)
2526                 goto out;
2527
2528         status = nfs4_call_sync(server, &msg, &args, &res, 1);
2529         if (status == 0) {
2530                 update_changeattr(dir, &res.cinfo);
2531                 nfs_post_op_update_inode(dir, res.dir_attr);
2532         }
2533         nfs_free_fattr(res.dir_attr);
2534 out:
2535         return status;
2536 }
2537
2538 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2539 {
2540         struct nfs4_exception exception = { };
2541         int err;
2542         do {
2543                 err = nfs4_handle_exception(NFS_SERVER(dir),
2544                                 _nfs4_proc_remove(dir, name),
2545                                 &exception);
2546         } while (exception.retry);
2547         return err;
2548 }
2549
2550 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2551 {
2552         struct nfs_server *server = NFS_SERVER(dir);
2553         struct nfs_removeargs *args = msg->rpc_argp;
2554         struct nfs_removeres *res = msg->rpc_resp;
2555
2556         args->bitmask = server->cache_consistency_bitmask;
2557         res->server = server;
2558         res->seq_res.sr_slot = NULL;
2559         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2560 }
2561
2562 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2563 {
2564         struct nfs_removeres *res = task->tk_msg.rpc_resp;
2565
2566         if (!nfs4_sequence_done(task, &res->seq_res))
2567                 return 0;
2568         if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2569                 return 0;
2570         update_changeattr(dir, &res->cinfo);
2571         nfs_post_op_update_inode(dir, res->dir_attr);
2572         return 1;
2573 }
2574
2575 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2576 {
2577         struct nfs_server *server = NFS_SERVER(dir);
2578         struct nfs_renameargs *arg = msg->rpc_argp;
2579         struct nfs_renameres *res = msg->rpc_resp;
2580
2581         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2582         arg->bitmask = server->attr_bitmask;
2583         res->server = server;
2584 }
2585
2586 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2587                                  struct inode *new_dir)
2588 {
2589         struct nfs_renameres *res = task->tk_msg.rpc_resp;
2590
2591         if (!nfs4_sequence_done(task, &res->seq_res))
2592                 return 0;
2593         if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2594                 return 0;
2595
2596         update_changeattr(old_dir, &res->old_cinfo);
2597         nfs_post_op_update_inode(old_dir, res->old_fattr);
2598         update_changeattr(new_dir, &res->new_cinfo);
2599         nfs_post_op_update_inode(new_dir, res->new_fattr);
2600         return 1;
2601 }
2602
2603 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2604                 struct inode *new_dir, struct qstr *new_name)
2605 {
2606         struct nfs_server *server = NFS_SERVER(old_dir);
2607         struct nfs_renameargs arg = {
2608                 .old_dir = NFS_FH(old_dir),
2609                 .new_dir = NFS_FH(new_dir),
2610                 .old_name = old_name,
2611                 .new_name = new_name,
2612                 .bitmask = server->attr_bitmask,
2613         };
2614         struct nfs_renameres res = {
2615                 .server = server,
2616         };
2617         struct rpc_message msg = {
2618                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2619                 .rpc_argp = &arg,
2620                 .rpc_resp = &res,
2621         };
2622         int status = -ENOMEM;
2623
2624         res.old_fattr = nfs_alloc_fattr();
2625         res.new_fattr = nfs_alloc_fattr();
2626         if (res.old_fattr == NULL || res.new_fattr == NULL)
2627                 goto out;
2628
2629         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2630         if (!status) {
2631                 update_changeattr(old_dir, &res.old_cinfo);
2632                 nfs_post_op_update_inode(old_dir, res.old_fattr);
2633                 update_changeattr(new_dir, &res.new_cinfo);
2634                 nfs_post_op_update_inode(new_dir, res.new_fattr);
2635         }
2636 out:
2637         nfs_free_fattr(res.new_fattr);
2638         nfs_free_fattr(res.old_fattr);
2639         return status;
2640 }
2641
2642 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643                 struct inode *new_dir, struct qstr *new_name)
2644 {
2645         struct nfs4_exception exception = { };
2646         int err;
2647         do {
2648                 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2649                                 _nfs4_proc_rename(old_dir, old_name,
2650                                         new_dir, new_name),
2651                                 &exception);
2652         } while (exception.retry);
2653         return err;
2654 }
2655
2656 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2657 {
2658         struct nfs_server *server = NFS_SERVER(inode);
2659         struct nfs4_link_arg arg = {
2660                 .fh     = NFS_FH(inode),
2661                 .dir_fh = NFS_FH(dir),
2662                 .name   = name,
2663                 .bitmask = server->attr_bitmask,
2664         };
2665         struct nfs4_link_res res = {
2666                 .server = server,
2667         };
2668         struct rpc_message msg = {
2669                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2670                 .rpc_argp = &arg,
2671                 .rpc_resp = &res,
2672         };
2673         int status = -ENOMEM;
2674
2675         res.fattr = nfs_alloc_fattr();
2676         res.dir_attr = nfs_alloc_fattr();
2677         if (res.fattr == NULL || res.dir_attr == NULL)
2678                 goto out;
2679
2680         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2681         if (!status) {
2682                 update_changeattr(dir, &res.cinfo);
2683                 nfs_post_op_update_inode(dir, res.dir_attr);
2684                 nfs_post_op_update_inode(inode, res.fattr);
2685         }
2686 out:
2687         nfs_free_fattr(res.dir_attr);
2688         nfs_free_fattr(res.fattr);
2689         return status;
2690 }
2691
2692 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2693 {
2694         struct nfs4_exception exception = { };
2695         int err;
2696         do {
2697                 err = nfs4_handle_exception(NFS_SERVER(inode),
2698                                 _nfs4_proc_link(inode, dir, name),
2699                                 &exception);
2700         } while (exception.retry);
2701         return err;
2702 }
2703
2704 struct nfs4_createdata {
2705         struct rpc_message msg;
2706         struct nfs4_create_arg arg;
2707         struct nfs4_create_res res;
2708         struct nfs_fh fh;
2709         struct nfs_fattr fattr;
2710         struct nfs_fattr dir_fattr;
2711 };
2712
2713 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2714                 struct qstr *name, struct iattr *sattr, u32 ftype)
2715 {
2716         struct nfs4_createdata *data;
2717
2718         data = kzalloc(sizeof(*data), GFP_KERNEL);
2719         if (data != NULL) {
2720                 struct nfs_server *server = NFS_SERVER(dir);
2721
2722                 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2723                 data->msg.rpc_argp = &data->arg;
2724                 data->msg.rpc_resp = &data->res;
2725                 data->arg.dir_fh = NFS_FH(dir);
2726                 data->arg.server = server;
2727                 data->arg.name = name;
2728                 data->arg.attrs = sattr;
2729                 data->arg.ftype = ftype;
2730                 data->arg.bitmask = server->attr_bitmask;
2731                 data->res.server = server;
2732                 data->res.fh = &data->fh;
2733                 data->res.fattr = &data->fattr;
2734                 data->res.dir_fattr = &data->dir_fattr;
2735                 nfs_fattr_init(data->res.fattr);
2736                 nfs_fattr_init(data->res.dir_fattr);
2737         }
2738         return data;
2739 }
2740
2741 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2742 {
2743         int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2744                                     &data->arg, &data->res, 1);
2745         if (status == 0) {
2746                 update_changeattr(dir, &data->res.dir_cinfo);
2747                 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2748                 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2749         }
2750         return status;
2751 }
2752
2753 static void nfs4_free_createdata(struct nfs4_createdata *data)
2754 {
2755         kfree(data);
2756 }
2757
2758 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2759                 struct page *page, unsigned int len, struct iattr *sattr)
2760 {
2761         struct nfs4_createdata *data;
2762         int status = -ENAMETOOLONG;
2763
2764         if (len > NFS4_MAXPATHLEN)
2765                 goto out;
2766
2767         status = -ENOMEM;
2768         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2769         if (data == NULL)
2770                 goto out;
2771
2772         data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2773         data->arg.u.symlink.pages = &page;
2774         data->arg.u.symlink.len = len;
2775
2776         status = nfs4_do_create(dir, dentry, data);
2777
2778         nfs4_free_createdata(data);
2779 out:
2780         return status;
2781 }
2782
2783 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2784                 struct page *page, unsigned int len, struct iattr *sattr)
2785 {
2786         struct nfs4_exception exception = { };
2787         int err;
2788         do {
2789                 err = nfs4_handle_exception(NFS_SERVER(dir),
2790                                 _nfs4_proc_symlink(dir, dentry, page,
2791                                                         len, sattr),
2792                                 &exception);
2793         } while (exception.retry);
2794         return err;
2795 }
2796
2797 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2798                 struct iattr *sattr)
2799 {
2800         struct nfs4_createdata *data;
2801         int status = -ENOMEM;
2802
2803         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2804         if (data == NULL)
2805                 goto out;
2806
2807         status = nfs4_do_create(dir, dentry, data);
2808
2809         nfs4_free_createdata(data);
2810 out:
2811         return status;
2812 }
2813
2814 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2815                 struct iattr *sattr)
2816 {
2817         struct nfs4_exception exception = { };
2818         int err;
2819         do {
2820                 err = nfs4_handle_exception(NFS_SERVER(dir),
2821                                 _nfs4_proc_mkdir(dir, dentry, sattr),
2822                                 &exception);
2823         } while (exception.retry);
2824         return err;
2825 }
2826
2827 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2828                 u64 cookie, struct page **pages, unsigned int count, int plus)
2829 {
2830         struct inode            *dir = dentry->d_inode;
2831         struct nfs4_readdir_arg args = {
2832                 .fh = NFS_FH(dir),
2833                 .pages = pages,
2834                 .pgbase = 0,
2835                 .count = count,
2836                 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2837                 .plus = plus,
2838         };
2839         struct nfs4_readdir_res res;
2840         struct rpc_message msg = {
2841                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2842                 .rpc_argp = &args,
2843                 .rpc_resp = &res,
2844                 .rpc_cred = cred,
2845         };
2846         int                     status;
2847
2848         dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2849                         dentry->d_parent->d_name.name,
2850                         dentry->d_name.name,
2851                         (unsigned long long)cookie);
2852         nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2853         res.pgbase = args.pgbase;
2854         status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2855         if (status >= 0) {
2856                 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2857                 status += args.pgbase;
2858         }
2859
2860         nfs_invalidate_atime(dir);
2861
2862         dprintk("%s: returns %d\n", __func__, status);
2863         return status;
2864 }
2865
2866 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2867                 u64 cookie, struct page **pages, unsigned int count, int plus)
2868 {
2869         struct nfs4_exception exception = { };
2870         int err;
2871         do {
2872                 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2873                                 _nfs4_proc_readdir(dentry, cred, cookie,
2874                                         pages, count, plus),
2875                                 &exception);
2876         } while (exception.retry);
2877         return err;
2878 }
2879
2880 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2881                 struct iattr *sattr, dev_t rdev)
2882 {
2883         struct nfs4_createdata *data;
2884         int mode = sattr->ia_mode;
2885         int status = -ENOMEM;
2886
2887         BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2888         BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2889
2890         data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2891         if (data == NULL)
2892                 goto out;
2893
2894         if (S_ISFIFO(mode))
2895                 data->arg.ftype = NF4FIFO;
2896         else if (S_ISBLK(mode)) {
2897                 data->arg.ftype = NF4BLK;
2898                 data->arg.u.device.specdata1 = MAJOR(rdev);
2899                 data->arg.u.device.specdata2 = MINOR(rdev);
2900         }
2901         else if (S_ISCHR(mode)) {
2902                 data->arg.ftype = NF4CHR;
2903                 data->arg.u.device.specdata1 = MAJOR(rdev);
2904                 data->arg.u.device.specdata2 = MINOR(rdev);
2905         }
2906
2907         status = nfs4_do_create(dir, dentry, data);
2908
2909         nfs4_free_createdata(data);
2910 out:
2911         return status;
2912 }
2913
2914 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2915                 struct iattr *sattr, dev_t rdev)
2916 {
2917         struct nfs4_exception exception = { };
2918         int err;
2919         do {
2920                 err = nfs4_handle_exception(NFS_SERVER(dir),
2921                                 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2922                                 &exception);
2923         } while (exception.retry);
2924         return err;
2925 }
2926
2927 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2928                  struct nfs_fsstat *fsstat)
2929 {
2930         struct nfs4_statfs_arg args = {
2931                 .fh = fhandle,
2932                 .bitmask = server->attr_bitmask,
2933         };
2934         struct nfs4_statfs_res res = {
2935                 .fsstat = fsstat,
2936         };
2937         struct rpc_message msg = {
2938                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2939                 .rpc_argp = &args,
2940                 .rpc_resp = &res,
2941         };
2942
2943         nfs_fattr_init(fsstat->fattr);
2944         return  nfs4_call_sync(server, &msg, &args, &res, 0);
2945 }
2946
2947 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2948 {
2949         struct nfs4_exception exception = { };
2950         int err;
2951         do {
2952                 err = nfs4_handle_exception(server,
2953                                 _nfs4_proc_statfs(server, fhandle, fsstat),
2954                                 &exception);
2955         } while (exception.retry);
2956         return err;
2957 }
2958
2959 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2960                 struct nfs_fsinfo *fsinfo)
2961 {
2962         struct nfs4_fsinfo_arg args = {
2963                 .fh = fhandle,
2964                 .bitmask = server->attr_bitmask,
2965         };
2966         struct nfs4_fsinfo_res res = {
2967                 .fsinfo = fsinfo,
2968         };
2969         struct rpc_message msg = {
2970                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2971                 .rpc_argp = &args,
2972                 .rpc_resp = &res,
2973         };
2974
2975         return nfs4_call_sync(server, &msg, &args, &res, 0);
2976 }
2977
2978 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2979 {
2980         struct nfs4_exception exception = { };
2981         int err;
2982
2983         do {
2984                 err = nfs4_handle_exception(server,
2985                                 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2986                                 &exception);
2987         } while (exception.retry);
2988         return err;
2989 }
2990
2991 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2992 {
2993         nfs_fattr_init(fsinfo->fattr);
2994         return nfs4_do_fsinfo(server, fhandle, fsinfo);
2995 }
2996
2997 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2998                 struct nfs_pathconf *pathconf)
2999 {
3000         struct nfs4_pathconf_arg args = {
3001                 .fh = fhandle,
3002                 .bitmask = server->attr_bitmask,
3003         };
3004         struct nfs4_pathconf_res res = {
3005                 .pathconf = pathconf,
3006         };
3007         struct rpc_message msg = {
3008                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3009                 .rpc_argp = &args,
3010                 .rpc_resp = &res,
3011         };
3012
3013         /* None of the pathconf attributes are mandatory to implement */
3014         if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3015                 memset(pathconf, 0, sizeof(*pathconf));
3016                 return 0;
3017         }
3018
3019         nfs_fattr_init(pathconf->fattr);
3020         return nfs4_call_sync(server, &msg, &args, &res, 0);
3021 }
3022
3023 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3024                 struct nfs_pathconf *pathconf)
3025 {
3026         struct nfs4_exception exception = { };
3027         int err;
3028
3029         do {
3030                 err = nfs4_handle_exception(server,
3031                                 _nfs4_proc_pathconf(server, fhandle, pathconf),
3032                                 &exception);
3033         } while (exception.retry);
3034         return err;
3035 }
3036
3037 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3038 {
3039         struct nfs_server *server = NFS_SERVER(data->inode);
3040
3041         dprintk("--> %s\n", __func__);
3042
3043         if (!nfs4_sequence_done(task, &data->res.seq_res))
3044                 return -EAGAIN;
3045
3046         if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3047                 nfs_restart_rpc(task, server->nfs_client);
3048                 return -EAGAIN;
3049         }
3050
3051         nfs_invalidate_atime(data->inode);
3052         if (task->tk_status > 0)
3053                 renew_lease(server, data->timestamp);
3054         return 0;
3055 }
3056
3057 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3058 {
3059         data->timestamp   = jiffies;
3060         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3061 }
3062
3063 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3064 {
3065         struct inode *inode = data->inode;
3066
3067         if (!nfs4_sequence_done(task, &data->res.seq_res))
3068                 return -EAGAIN;
3069
3070         if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3071                 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3072                 return -EAGAIN;
3073         }
3074         if (task->tk_status >= 0) {
3075                 renew_lease(NFS_SERVER(inode), data->timestamp);
3076                 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3077         }
3078         return 0;
3079 }
3080
3081 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3082 {
3083         struct nfs_server *server = NFS_SERVER(data->inode);
3084
3085         data->args.bitmask = server->cache_consistency_bitmask;
3086         data->res.server = server;
3087         data->timestamp   = jiffies;
3088
3089         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3090 }
3091
3092 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3093 {
3094         struct inode *inode = data->inode;
3095
3096         if (!nfs4_sequence_done(task, &data->res.seq_res))
3097                 return -EAGAIN;
3098
3099         if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3100                 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3101                 return -EAGAIN;
3102         }
3103         nfs_refresh_inode(inode, data->res.fattr);
3104         return 0;
3105 }
3106
3107 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3108 {
3109         struct nfs_server *server = NFS_SERVER(data->inode);
3110
3111         data->args.bitmask = server->cache_consistency_bitmask;
3112         data->res.server = server;
3113         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3114 }
3115
3116 struct nfs4_renewdata {
3117         struct nfs_client       *client;
3118         unsigned long           timestamp;
3119 };
3120
3121 /*
3122  * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3123  * standalone procedure for queueing an asynchronous RENEW.
3124  */
3125 static void nfs4_renew_release(void *calldata)
3126 {
3127         struct nfs4_renewdata *data = calldata;
3128         struct nfs_client *clp = data->client;
3129
3130         if (atomic_read(&clp->cl_count) > 1)
3131                 nfs4_schedule_state_renewal(clp);
3132         nfs_put_client(clp);
3133         kfree(data);
3134 }
3135
3136 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3137 {
3138         struct nfs4_renewdata *data = calldata;
3139         struct nfs_client *clp = data->client;
3140         unsigned long timestamp = data->timestamp;
3141
3142         if (task->tk_status < 0) {
3143                 /* Unless we're shutting down, schedule state recovery! */
3144                 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3145                         nfs4_schedule_state_recovery(clp);
3146                 return;
3147         }
3148         do_renew_lease(clp, timestamp);
3149 }
3150
3151 static const struct rpc_call_ops nfs4_renew_ops = {
3152         .rpc_call_done = nfs4_renew_done,
3153         .rpc_release = nfs4_renew_release,
3154 };
3155
3156 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3157 {
3158         struct rpc_message msg = {
3159                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3160                 .rpc_argp       = clp,
3161                 .rpc_cred       = cred,
3162         };
3163         struct nfs4_renewdata *data;
3164
3165         if (!atomic_inc_not_zero(&clp->cl_count))
3166                 return -EIO;
3167         data = kmalloc(sizeof(*data), GFP_KERNEL);
3168         if (data == NULL)
3169                 return -ENOMEM;
3170         data->client = clp;
3171         data->timestamp = jiffies;
3172         return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3173                         &nfs4_renew_ops, data);
3174 }
3175
3176 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3177 {
3178         struct rpc_message msg = {
3179                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3180                 .rpc_argp       = clp,
3181                 .rpc_cred       = cred,
3182         };
3183         unsigned long now = jiffies;
3184         int status;
3185
3186         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3187         if (status < 0)
3188                 return status;
3189         do_renew_lease(clp, now);
3190         return 0;
3191 }
3192
3193 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3194 {
3195         return (server->caps & NFS_CAP_ACLS)
3196                 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3197                 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3198 }
3199
3200 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3201  * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3202  * the stack.
3203  */
3204 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3205
3206 static void buf_to_pages(const void *buf, size_t buflen,
3207                 struct page **pages, unsigned int *pgbase)
3208 {
3209         const void *p = buf;
3210
3211         *pgbase = offset_in_page(buf);
3212         p -= *pgbase;
3213         while (p < buf + buflen) {
3214                 *(pages++) = virt_to_page(p);
3215                 p += PAGE_CACHE_SIZE;
3216         }
3217 }
3218
3219 struct nfs4_cached_acl {
3220         int cached;
3221         size_t len;
3222         char data[0];
3223 };
3224
3225 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3226 {
3227         struct nfs_inode *nfsi = NFS_I(inode);
3228
3229         spin_lock(&inode->i_lock);
3230         kfree(nfsi->nfs4_acl);
3231         nfsi->nfs4_acl = acl;
3232         spin_unlock(&inode->i_lock);
3233 }
3234
3235 static void nfs4_zap_acl_attr(struct inode *inode)
3236 {
3237         nfs4_set_cached_acl(inode, NULL);
3238 }
3239
3240 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3241 {
3242         struct nfs_inode *nfsi = NFS_I(inode);
3243         struct nfs4_cached_acl *acl;
3244         int ret = -ENOENT;
3245
3246         spin_lock(&inode->i_lock);
3247         acl = nfsi->nfs4_acl;
3248         if (acl == NULL)
3249                 goto out;
3250         if (buf == NULL) /* user is just asking for length */
3251                 goto out_len;
3252         if (acl->cached == 0)
3253                 goto out;
3254         ret = -ERANGE; /* see getxattr(2) man page */
3255         if (acl->len > buflen)
3256                 goto out;
3257         memcpy(buf, acl->data, acl->len);
3258 out_len:
3259         ret = acl->len;
3260 out:
3261         spin_unlock(&inode->i_lock);
3262         return ret;
3263 }
3264
3265 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3266 {
3267         struct nfs4_cached_acl *acl;
3268
3269         if (buf && acl_len <= PAGE_SIZE) {
3270                 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3271                 if (acl == NULL)
3272                         goto out;
3273                 acl->cached = 1;
3274                 memcpy(acl->data, buf, acl_len);
3275         } else {
3276                 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3277                 if (acl == NULL)
3278                         goto out;
3279                 acl->cached = 0;
3280         }
3281         acl->len = acl_len;
3282 out:
3283         nfs4_set_cached_acl(inode, acl);
3284 }
3285
3286 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3287 {
3288         struct page *pages[NFS4ACL_MAXPAGES];
3289         struct nfs_getaclargs args = {
3290                 .fh = NFS_FH(inode),
3291                 .acl_pages = pages,
3292                 .acl_len = buflen,
3293         };
3294         struct nfs_getaclres res = {
3295                 .acl_len = buflen,
3296         };
3297         void *resp_buf;
3298         struct rpc_message msg = {
3299                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3300                 .rpc_argp = &args,
3301                 .rpc_resp = &res,
3302         };
3303         struct page *localpage = NULL;
3304         int ret;
3305
3306         if (buflen < PAGE_SIZE) {
3307                 /* As long as we're doing a round trip to the server anyway,
3308                  * let's be prepared for a page of acl data. */
3309                 localpage = alloc_page(GFP_KERNEL);
3310                 resp_buf = page_address(localpage);
3311                 if (localpage == NULL)
3312                         return -ENOMEM;
3313                 args.acl_pages[0] = localpage;
3314                 args.acl_pgbase = 0;
3315                 args.acl_len = PAGE_SIZE;
3316         } else {
3317                 resp_buf = buf;
3318                 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3319         }
3320         ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3321         if (ret)
3322                 goto out_free;
3323         if (res.acl_len > args.acl_len)
3324                 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3325         else
3326                 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3327         if (buf) {
3328                 ret = -ERANGE;
3329                 if (res.acl_len > buflen)
3330                         goto out_free;
3331                 if (localpage)
3332                         memcpy(buf, resp_buf, res.acl_len);
3333         }
3334         ret = res.acl_len;
3335 out_free:
3336         if (localpage)
3337                 __free_page(localpage);
3338         return ret;
3339 }
3340
3341 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3342 {
3343         struct nfs4_exception exception = { };
3344         ssize_t ret;
3345         do {
3346                 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3347                 if (ret >= 0)
3348                         break;
3349                 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3350         } while (exception.retry);
3351         return ret;
3352 }
3353
3354 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3355 {
3356         struct nfs_server *server = NFS_SERVER(inode);
3357         int ret;
3358
3359         if (!nfs4_server_supports_acls(server))
3360                 return -EOPNOTSUPP;
3361         ret = nfs_revalidate_inode(server, inode);
3362         if (ret < 0)
3363                 return ret;
3364         if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3365                 nfs_zap_acl_cache(inode);
3366         ret = nfs4_read_cached_acl(inode, buf, buflen);
3367         if (ret != -ENOENT)
3368                 return ret;
3369         return nfs4_get_acl_uncached(inode, buf, buflen);
3370 }
3371
3372 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3373 {
3374         struct nfs_server *server = NFS_SERVER(inode);
3375         struct page *pages[NFS4ACL_MAXPAGES];
3376         struct nfs_setaclargs arg = {
3377                 .fh             = NFS_FH(inode),
3378                 .acl_pages      = pages,
3379                 .acl_len        = buflen,
3380         };
3381         struct nfs_setaclres res;
3382         struct rpc_message msg = {
3383                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3384                 .rpc_argp       = &arg,
3385                 .rpc_resp       = &res,
3386         };
3387         int ret;
3388
3389         if (!nfs4_server_supports_acls(server))
3390                 return -EOPNOTSUPP;
3391         nfs_inode_return_delegation(inode);
3392         buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3393         ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3394         /*
3395          * Acl update can result in inode attribute update.
3396          * so mark the attribute cache invalid.
3397          */
3398         spin_lock(&inode->i_lock);
3399         NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3400         spin_unlock(&inode->i_lock);
3401         nfs_access_zap_cache(inode);
3402         nfs_zap_acl_cache(inode);
3403         return ret;
3404 }
3405
3406 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3407 {
3408         struct nfs4_exception exception = { };
3409         int err;
3410         do {
3411                 err = nfs4_handle_exception(NFS_SERVER(inode),
3412                                 __nfs4_proc_set_acl(inode, buf, buflen),
3413                                 &exception);
3414         } while (exception.retry);
3415         return err;
3416 }
3417
3418 static int
3419 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3420 {
3421         struct nfs_client *clp = server->nfs_client;
3422
3423         if (task->tk_status >= 0)
3424                 return 0;
3425         switch(task->tk_status) {
3426                 case -NFS4ERR_ADMIN_REVOKED:
3427                 case -NFS4ERR_BAD_STATEID:
3428                 case -NFS4ERR_OPENMODE:
3429                         if (state == NULL)
3430                                 break;
3431                         nfs4_state_mark_reclaim_nograce(clp, state);
3432                         goto do_state_recovery;
3433                 case -NFS4ERR_STALE_STATEID:
3434                 case -NFS4ERR_STALE_CLIENTID:
3435                 case -NFS4ERR_EXPIRED:
3436                         goto do_state_recovery;
3437 #if defined(CONFIG_NFS_V4_1)
3438                 case -NFS4ERR_BADSESSION:
3439                 case -NFS4ERR_BADSLOT:
3440                 case -NFS4ERR_BAD_HIGH_SLOT:
3441                 case -NFS4ERR_DEADSESSION:
3442                 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3443                 case -NFS4ERR_SEQ_FALSE_RETRY:
3444                 case -NFS4ERR_SEQ_MISORDERED:
3445                         dprintk("%s ERROR %d, Reset session\n", __func__,
3446                                 task->tk_status);
3447                         nfs4_schedule_state_recovery(clp);
3448                         task->tk_status = 0;
3449                         return -EAGAIN;
3450 #endif /* CONFIG_NFS_V4_1 */
3451                 case -NFS4ERR_DELAY:
3452                         nfs_inc_server_stats(server, NFSIOS_DELAY);
3453                 case -NFS4ERR_GRACE:
3454                 case -EKEYEXPIRED:
3455                         rpc_delay(task, NFS4_POLL_RETRY_MAX);
3456                         task->tk_status = 0;
3457                         return -EAGAIN;
3458                 case -NFS4ERR_OLD_STATEID:
3459                         task->tk_status = 0;
3460                         return -EAGAIN;
3461         }
3462         task->tk_status = nfs4_map_errors(task->tk_status);
3463         return 0;
3464 do_state_recovery:
3465         rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3466         nfs4_schedule_state_recovery(clp);
3467         if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3468                 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3469         task->tk_status = 0;
3470         return -EAGAIN;
3471 }
3472
3473 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3474                 unsigned short port, struct rpc_cred *cred,
3475                 struct nfs4_setclientid_res *res)
3476 {
3477         nfs4_verifier sc_verifier;
3478         struct nfs4_setclientid setclientid = {
3479                 .sc_verifier = &sc_verifier,
3480                 .sc_prog = program,
3481         };
3482         struct rpc_message msg = {
3483                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3484                 .rpc_argp = &setclientid,
3485                 .rpc_resp = res,
3486                 .rpc_cred = cred,
3487         };
3488         __be32 *p;
3489         int loop = 0;
3490         int status;
3491
3492         p = (__be32*)sc_verifier.data;
3493         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3494         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3495
3496         for(;;) {
3497                 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3498                                 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3499                                 clp->cl_ipaddr,
3500                                 rpc_peeraddr2str(clp->cl_rpcclient,
3501                                                         RPC_DISPLAY_ADDR),
3502                                 rpc_peeraddr2str(clp->cl_rpcclient,
3503                                                         RPC_DISPLAY_PROTO),
3504                                 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3505                                 clp->cl_id_uniquifier);
3506                 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3507                                 sizeof(setclientid.sc_netid),
3508                                 rpc_peeraddr2str(clp->cl_rpcclient,
3509                                                         RPC_DISPLAY_NETID));
3510                 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3511                                 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3512                                 clp->cl_ipaddr, port >> 8, port & 255);
3513
3514                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3515                 if (status != -NFS4ERR_CLID_INUSE)
3516                         break;
3517                 if (signalled())
3518                         break;
3519                 if (loop++ & 1)
3520                         ssleep(clp->cl_lease_time / HZ + 1);
3521                 else
3522                         if (++clp->cl_id_uniquifier == 0)
3523                                 break;
3524         }
3525         return status;
3526 }
3527
3528 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3529                 struct nfs4_setclientid_res *arg,
3530                 struct rpc_cred *cred)
3531 {
3532         struct nfs_fsinfo fsinfo;
3533         struct rpc_message msg = {
3534                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3535                 .rpc_argp = arg,
3536                 .rpc_resp = &fsinfo,
3537                 .rpc_cred = cred,
3538         };
3539         unsigned long now;
3540         int status;
3541
3542         now = jiffies;
3543         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3544         if (status == 0) {
3545                 spin_lock(&clp->cl_lock);
3546                 clp->cl_lease_time = fsinfo.lease_time * HZ;
3547                 clp->cl_last_renewal = now;
3548                 spin_unlock(&clp->cl_lock);
3549         }
3550         return status;
3551 }
3552
3553 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3554                 struct nfs4_setclientid_res *arg,
3555                 struct rpc_cred *cred)
3556 {
3557         long timeout = 0;
3558         int err;
3559         do {
3560                 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3561                 switch (err) {
3562                         case 0:
3563                                 return err;
3564                         case -NFS4ERR_RESOURCE:
3565                                 /* The IBM lawyers misread another document! */
3566                         case -NFS4ERR_DELAY:
3567                                 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3568                 }
3569         } while (err == 0);
3570         return err;
3571 }
3572
3573 struct nfs4_delegreturndata {
3574         struct nfs4_delegreturnargs args;
3575         struct nfs4_delegreturnres res;
3576         struct nfs_fh fh;
3577         nfs4_stateid stateid;
3578         unsigned long timestamp;
3579         struct nfs_fattr fattr;
3580         int rpc_status;
3581 };
3582
3583 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3584 {
3585         struct nfs4_delegreturndata *data = calldata;
3586
3587         if (!nfs4_sequence_done(task, &data->res.seq_res))
3588                 return;
3589
3590         switch (task->tk_status) {
3591         case -NFS4ERR_STALE_STATEID:
3592         case -NFS4ERR_EXPIRED:
3593         case 0:
3594                 renew_lease(data->res.server, data->timestamp);
3595                 break;
3596         default:
3597                 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3598                                 -EAGAIN) {
3599                         nfs_restart_rpc(task, data->res.server->nfs_client);
3600                         return;
3601                 }
3602         }
3603         data->rpc_status = task->tk_status;
3604 }
3605
3606 static void nfs4_delegreturn_release(void *calldata)
3607 {
3608         kfree(calldata);
3609 }
3610
3611 #if defined(CONFIG_NFS_V4_1)
3612 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3613 {
3614         struct nfs4_delegreturndata *d_data;
3615
3616         d_data = (struct nfs4_delegreturndata *)data;
3617
3618         if (nfs4_setup_sequence(d_data->res.server,
3619                                 &d_data->args.seq_args,
3620                                 &d_data->res.seq_res, 1, task))
3621                 return;
3622         rpc_call_start(task);
3623 }
3624 #endif /* CONFIG_NFS_V4_1 */
3625
3626 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3627 #if defined(CONFIG_NFS_V4_1)
3628         .rpc_call_prepare = nfs4_delegreturn_prepare,
3629 #endif /* CONFIG_NFS_V4_1 */
3630         .rpc_call_done = nfs4_delegreturn_done,
3631         .rpc_release = nfs4_delegreturn_release,
3632 };
3633
3634 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3635 {
3636         struct nfs4_delegreturndata *data;
3637         struct nfs_server *server = NFS_SERVER(inode);
3638         struct rpc_task *task;
3639         struct rpc_message msg = {
3640                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3641                 .rpc_cred = cred,
3642         };
3643         struct rpc_task_setup task_setup_data = {
3644                 .rpc_client = server->client,
3645                 .rpc_message = &msg,
3646                 .callback_ops = &nfs4_delegreturn_ops,
3647                 .flags = RPC_TASK_ASYNC,
3648         };
3649         int status = 0;
3650
3651         data = kzalloc(sizeof(*data), GFP_NOFS);
3652         if (data == NULL)
3653                 return -ENOMEM;
3654         data->args.fhandle = &data->fh;
3655         data->args.stateid = &data->stateid;
3656         data->args.bitmask = server->attr_bitmask;
3657         nfs_copy_fh(&data->fh, NFS_FH(inode));
3658         memcpy(&data->stateid, stateid, sizeof(data->stateid));
3659         data->res.fattr = &data->fattr;
3660         data->res.server = server;
3661         nfs_fattr_init(data->res.fattr);
3662         data->timestamp = jiffies;
3663         data->rpc_status = 0;
3664
3665         task_setup_data.callback_data = data;
3666         msg.rpc_argp = &data->args;
3667         msg.rpc_resp = &data->res;
3668         task = rpc_run_task(&task_setup_data);
3669         if (IS_ERR(task))
3670                 return PTR_ERR(task);
3671         if (!issync)
3672                 goto out;
3673         status = nfs4_wait_for_completion_rpc_task(task);
3674         if (status != 0)
3675                 goto out;
3676         status = data->rpc_status;
3677         if (status != 0)
3678                 goto out;
3679         nfs_refresh_inode(inode, &data->fattr);
3680 out:
3681         rpc_put_task(task);
3682         return status;
3683 }
3684
3685 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3686 {
3687         struct nfs_server *server = NFS_SERVER(inode);
3688         struct nfs4_exception exception = { };
3689         int err;
3690         do {
3691                 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3692                 switch (err) {
3693                         case -NFS4ERR_STALE_STATEID:
3694                         case -NFS4ERR_EXPIRED:
3695                         case 0:
3696                                 return 0;
3697                 }
3698                 err = nfs4_handle_exception(server, err, &exception);
3699         } while (exception.retry);
3700         return err;
3701 }
3702
3703 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3704 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3705
3706 /*
3707  * sleep, with exponential backoff, and retry the LOCK operation.
3708  */
3709 static unsigned long
3710 nfs4_set_lock_task_retry(unsigned long timeout)
3711 {
3712         schedule_timeout_killable(timeout);
3713         timeout <<= 1;
3714         if (timeout > NFS4_LOCK_MAXTIMEOUT)
3715                 return NFS4_LOCK_MAXTIMEOUT;
3716         return timeout;
3717 }
3718
3719 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3720 {
3721         struct inode *inode = state->inode;
3722         struct nfs_server *server = NFS_SERVER(inode);
3723         struct nfs_client *clp = server->nfs_client;
3724         struct nfs_lockt_args arg = {
3725                 .fh = NFS_FH(inode),
3726                 .fl = request,
3727         };
3728         struct nfs_lockt_res res = {
3729                 .denied = request,
3730         };
3731         struct rpc_message msg = {
3732                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3733                 .rpc_argp       = &arg,
3734                 .rpc_resp       = &res,
3735                 .rpc_cred       = state->owner->so_cred,
3736         };
3737         struct nfs4_lock_state *lsp;
3738         int status;
3739
3740         arg.lock_owner.clientid = clp->cl_clientid;
3741         status = nfs4_set_lock_state(state, request);
3742         if (status != 0)
3743                 goto out;
3744         lsp = request->fl_u.nfs4_fl.owner;
3745         arg.lock_owner.id = lsp->ls_id.id;
3746         status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3747         switch (status) {
3748                 case 0:
3749                         request->fl_type = F_UNLCK;
3750                         break;
3751                 case -NFS4ERR_DENIED:
3752                         status = 0;
3753         }
3754         request->fl_ops->fl_release_private(request);
3755 out:
3756         return status;
3757 }
3758
3759 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3760 {
3761         struct nfs4_exception exception = { };
3762         int err;
3763
3764         do {
3765                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3766                                 _nfs4_proc_getlk(state, cmd, request),
3767                                 &exception);
3768         } while (exception.retry);
3769         return err;
3770 }
3771
3772 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3773 {
3774         int res = 0;
3775         switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3776                 case FL_POSIX:
3777                         res = posix_lock_file_wait(file, fl);
3778                         break;
3779                 case FL_FLOCK:
3780                         res = flock_lock_file_wait(file, fl);
3781                         break;
3782                 default:
3783                         BUG();
3784         }
3785         return res;
3786 }
3787
3788 struct nfs4_unlockdata {
3789         struct nfs_locku_args arg;
3790         struct nfs_locku_res res;
3791         struct nfs4_lock_state *lsp;
3792         struct nfs_open_context *ctx;
3793         struct file_lock fl;
3794         const struct nfs_server *server;
3795         unsigned long timestamp;
3796 };
3797
3798 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3799                 struct nfs_open_context *ctx,
3800                 struct nfs4_lock_state *lsp,
3801                 struct nfs_seqid *seqid)
3802 {
3803         struct nfs4_unlockdata *p;
3804         struct inode *inode = lsp->ls_state->inode;
3805
3806         p = kzalloc(sizeof(*p), GFP_NOFS);
3807         if (p == NULL)
3808                 return NULL;
3809         p->arg.fh = NFS_FH(inode);
3810         p->arg.fl = &p->fl;
3811         p->arg.seqid = seqid;
3812         p->res.seqid = seqid;
3813         p->arg.stateid = &lsp->ls_stateid;
3814         p->lsp = lsp;
3815         atomic_inc(&lsp->ls_count);
3816         /* Ensure we don't close file until we're done freeing locks! */
3817         p->ctx = get_nfs_open_context(ctx);
3818         memcpy(&p->fl, fl, sizeof(p->fl));
3819         p->server = NFS_SERVER(inode);
3820         return p;
3821 }
3822
3823 static void nfs4_locku_release_calldata(void *data)
3824 {
3825         struct nfs4_unlockdata *calldata = data;
3826         nfs_free_seqid(calldata->arg.seqid);
3827         nfs4_put_lock_state(calldata->lsp);
3828         put_nfs_open_context(calldata->ctx);
3829         kfree(calldata);
3830 }
3831
3832 static void nfs4_locku_done(struct rpc_task *task, void *data)
3833 {
3834         struct nfs4_unlockdata *calldata = data;
3835
3836         if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3837                 return;
3838         switch (task->tk_status) {
3839                 case 0:
3840                         memcpy(calldata->lsp->ls_stateid.data,
3841                                         calldata->res.stateid.data,
3842                                         sizeof(calldata->lsp->ls_stateid.data));
3843                         renew_lease(calldata->server, calldata->timestamp);
3844                         break;
3845                 case -NFS4ERR_BAD_STATEID:
3846                 case -NFS4ERR_OLD_STATEID:
3847                 case -NFS4ERR_STALE_STATEID:
3848                 case -NFS4ERR_EXPIRED:
3849                         break;
3850                 default:
3851                         if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3852                                 nfs_restart_rpc(task,
3853                                                  calldata->server->nfs_client);
3854         }
3855 }
3856
3857 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3858 {
3859         struct nfs4_unlockdata *calldata = data;
3860
3861         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3862                 return;
3863         if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3864                 /* Note: exit _without_ running nfs4_locku_done */
3865                 task->tk_action = NULL;
3866                 return;
3867         }
3868         calldata->timestamp = jiffies;
3869         if (nfs4_setup_sequence(calldata->server,
3870                                 &calldata->arg.seq_args,
3871                                 &calldata->res.seq_res, 1, task))
3872                 return;
3873         rpc_call_start(task);
3874 }
3875
3876 static const struct rpc_call_ops nfs4_locku_ops = {
3877         .rpc_call_prepare = nfs4_locku_prepare,
3878         .rpc_call_done = nfs4_locku_done,
3879         .rpc_release = nfs4_locku_release_calldata,
3880 };
3881
3882 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3883                 struct nfs_open_context *ctx,
3884                 struct nfs4_lock_state *lsp,
3885                 struct nfs_seqid *seqid)
3886 {
3887         struct nfs4_unlockdata *data;
3888         struct rpc_message msg = {
3889                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3890                 .rpc_cred = ctx->cred,
3891         };
3892         struct rpc_task_setup task_setup_data = {
3893                 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3894                 .rpc_message = &msg,
3895                 .callback_ops = &nfs4_locku_ops,
3896                 .workqueue = nfsiod_workqueue,
3897                 .flags = RPC_TASK_ASYNC,
3898         };
3899
3900         /* Ensure this is an unlock - when canceling a lock, the
3901          * canceled lock is passed in, and it won't be an unlock.
3902          */
3903         fl->fl_type = F_UNLCK;
3904
3905         data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3906         if (data == NULL) {
3907                 nfs_free_seqid(seqid);
3908                 return ERR_PTR(-ENOMEM);
3909         }
3910
3911         msg.rpc_argp = &data->arg;
3912         msg.rpc_resp = &data->res;
3913         task_setup_data.callback_data = data;
3914         return rpc_run_task(&task_setup_data);
3915 }
3916
3917 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3918 {
3919         struct nfs_inode *nfsi = NFS_I(state->inode);
3920         struct nfs_seqid *seqid;
3921         struct nfs4_lock_state *lsp;
3922         struct rpc_task *task;
3923         int status = 0;
3924         unsigned char fl_flags = request->fl_flags;
3925
3926         status = nfs4_set_lock_state(state, request);
3927         /* Unlock _before_ we do the RPC call */
3928         request->fl_flags |= FL_EXISTS;
3929         down_read(&nfsi->rwsem);
3930         if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3931                 up_read(&nfsi->rwsem);
3932                 goto out;
3933         }
3934         up_read(&nfsi->rwsem);
3935         if (status != 0)
3936                 goto out;
3937         /* Is this a delegated lock? */
3938         if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3939                 goto out;
3940         lsp = request->fl_u.nfs4_fl.owner;
3941         seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
3942         status = -ENOMEM;
3943         if (seqid == NULL)
3944                 goto out;
3945         task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3946         status = PTR_ERR(task);
3947         if (IS_ERR(task))
3948                 goto out;
3949         status = nfs4_wait_for_completion_rpc_task(task);
3950         rpc_put_task(task);
3951 out:
3952         request->fl_flags = fl_flags;
3953         return status;
3954 }
3955
3956 struct nfs4_lockdata {
3957         struct nfs_lock_args arg;
3958         struct nfs_lock_res res;
3959         struct nfs4_lock_state *lsp;
3960         struct nfs_open_context *ctx;
3961         struct file_lock fl;
3962         unsigned long timestamp;
3963         int rpc_status;
3964         int cancelled;
3965         struct nfs_server *server;
3966 };
3967
3968 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3969                 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3970                 gfp_t gfp_mask)
3971 {
3972         struct nfs4_lockdata *p;
3973         struct inode *inode = lsp->ls_state->inode;
3974         struct nfs_server *server = NFS_SERVER(inode);
3975
3976         p = kzalloc(sizeof(*p), gfp_mask);
3977         if (p == NULL)
3978                 return NULL;
3979
3980         p->arg.fh = NFS_FH(inode);
3981         p->arg.fl = &p->fl;
3982         p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
3983         if (p->arg.open_seqid == NULL)
3984                 goto out_free;
3985         p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
3986         if (p->arg.lock_seqid == NULL)
3987                 goto out_free_seqid;
3988         p->arg.lock_stateid = &lsp->ls_stateid;
3989         p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3990         p->arg.lock_owner.id = lsp->ls_id.id;
3991         p->res.lock_seqid = p->arg.lock_seqid;
3992         p->lsp = lsp;
3993         p->server = server;
3994         atomic_inc(&lsp->ls_count);
3995         p->ctx = get_nfs_open_context(ctx);
3996         memcpy(&p->fl, fl, sizeof(p->fl));
3997         return p;
3998 out_free_seqid:
3999         nfs_free_seqid(p->arg.open_seqid);
4000 out_free:
4001         kfree(p);
4002         return NULL;
4003 }
4004
4005 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4006 {
4007         struct nfs4_lockdata *data = calldata;
4008         struct nfs4_state *state = data->lsp->ls_state;
4009
4010         dprintk("%s: begin!\n", __func__);
4011         if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4012                 return;
4013         /* Do we need to do an open_to_lock_owner? */
4014         if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4015                 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4016                         return;
4017                 data->arg.open_stateid = &state->stateid;
4018                 data->arg.new_lock_owner = 1;
4019                 data->res.open_seqid = data->arg.open_seqid;
4020         } else
4021                 data->arg.new_lock_owner = 0;
4022         data->timestamp = jiffies;
4023         if (nfs4_setup_sequence(data->server,
4024                                 &data->arg.seq_args,
4025                                 &data->res.seq_res, 1, task))
4026                 return;
4027         rpc_call_start(task);
4028         dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4029 }
4030
4031 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4032 {
4033         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4034         nfs4_lock_prepare(task, calldata);
4035 }
4036
4037 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4038 {
4039         struct nfs4_lockdata *data = calldata;
4040
4041         dprintk("%s: begin!\n", __func__);
4042
4043         if (!nfs4_sequence_done(task, &data->res.seq_res))
4044                 return;
4045
4046         data->rpc_status = task->tk_status;
4047         if (data->arg.new_lock_owner != 0) {
4048                 if (data->rpc_status == 0)
4049                         nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4050                 else
4051                         goto out;
4052         }
4053         if (data->rpc_status == 0) {
4054                 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4055                                         sizeof(data->lsp->ls_stateid.data));
4056                 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4057                 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4058         }
4059 out:
4060         dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4061 }
4062
4063 static void nfs4_lock_release(void *calldata)
4064 {
4065         struct nfs4_lockdata *data = calldata;
4066
4067         dprintk("%s: begin!\n", __func__);
4068         nfs_free_seqid(data->arg.open_seqid);
4069         if (data->cancelled != 0) {
4070                 struct rpc_task *task;
4071                 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4072                                 data->arg.lock_seqid);
4073                 if (!IS_ERR(task))
4074                         rpc_put_task(task);
4075                 dprintk("%s: cancelling lock!\n", __func__);
4076         } else
4077                 nfs_free_seqid(data->arg.lock_seqid);
4078         nfs4_put_lock_state(data->lsp);
4079         put_nfs_open_context(data->ctx);
4080         kfree(data);
4081         dprintk("%s: done!\n", __func__);
4082 }
4083
4084 static const struct rpc_call_ops nfs4_lock_ops = {
4085         .rpc_call_prepare = nfs4_lock_prepare,
4086         .rpc_call_done = nfs4_lock_done,
4087         .rpc_release = nfs4_lock_release,
4088 };
4089
4090 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4091         .rpc_call_prepare = nfs4_recover_lock_prepare,
4092         .rpc_call_done = nfs4_lock_done,
4093         .rpc_release = nfs4_lock_release,
4094 };
4095
4096 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4097 {
4098         struct nfs_client *clp = server->nfs_client;
4099         struct nfs4_state *state = lsp->ls_state;
4100
4101         switch (error) {
4102         case -NFS4ERR_ADMIN_REVOKED:
4103         case -NFS4ERR_BAD_STATEID:
4104         case -NFS4ERR_EXPIRED:
4105                 if (new_lock_owner != 0 ||
4106                    (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4107                         nfs4_state_mark_reclaim_nograce(clp, state);
4108                 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4109                 break;
4110         case -NFS4ERR_STALE_STATEID:
4111                 if (new_lock_owner != 0 ||
4112                     (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4113                         nfs4_state_mark_reclaim_reboot(clp, state);
4114                 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4115         };
4116 }
4117
4118 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4119 {
4120         struct nfs4_lockdata *data;
4121         struct rpc_task *task;
4122         struct rpc_message msg = {
4123                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4124                 .rpc_cred = state->owner->so_cred,
4125         };
4126         struct rpc_task_setup task_setup_data = {
4127                 .rpc_client = NFS_CLIENT(state->inode),
4128                 .rpc_message = &msg,
4129                 .callback_ops = &nfs4_lock_ops,
4130                 .workqueue = nfsiod_workqueue,
4131                 .flags = RPC_TASK_ASYNC,
4132         };
4133         int ret;
4134
4135         dprintk("%s: begin!\n", __func__);
4136         data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4137                         fl->fl_u.nfs4_fl.owner,
4138                         recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4139         if (data == NULL)
4140                 return -ENOMEM;
4141         if (IS_SETLKW(cmd))
4142                 data->arg.block = 1;
4143         if (recovery_type > NFS_LOCK_NEW) {
4144                 if (recovery_type == NFS_LOCK_RECLAIM)
4145                         data->arg.reclaim = NFS_LOCK_RECLAIM;
4146                 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4147         }
4148         msg.rpc_argp = &data->arg;
4149         msg.rpc_resp = &data->res;
4150         task_setup_data.callback_data = data;
4151         task = rpc_run_task(&task_setup_data);
4152         if (IS_ERR(task))
4153                 return PTR_ERR(task);
4154         ret = nfs4_wait_for_completion_rpc_task(task);
4155         if (ret == 0) {
4156                 ret = data->rpc_status;
4157                 if (ret)
4158                         nfs4_handle_setlk_error(data->server, data->lsp,
4159                                         data->arg.new_lock_owner, ret);
4160         } else
4161                 data->cancelled = 1;
4162         rpc_put_task(task);
4163         dprintk("%s: done, ret = %d!\n", __func__, ret);
4164         return ret;
4165 }
4166
4167 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4168 {
4169         struct nfs_server *server = NFS_SERVER(state->inode);
4170         struct nfs4_exception exception = { };
4171         int err;
4172
4173         do {
4174                 /* Cache the lock if possible... */
4175                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4176                         return 0;
4177                 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4178                 if (err != -NFS4ERR_DELAY)
4179                         break;
4180                 nfs4_handle_exception(server, err, &exception);
4181         } while (exception.retry);
4182         return err;
4183 }
4184
4185 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4186 {
4187         struct nfs_server *server = NFS_SERVER(state->inode);
4188         struct nfs4_exception exception = { };
4189         int err;
4190
4191         err = nfs4_set_lock_state(state, request);
4192         if (err != 0)
4193                 return err;
4194         do {
4195                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4196                         return 0;
4197                 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4198                 switch (err) {
4199                 default:
4200                         goto out;
4201                 case -NFS4ERR_GRACE:
4202                 case -NFS4ERR_DELAY:
4203                         nfs4_handle_exception(server, err, &exception);
4204                         err = 0;
4205                 }
4206         } while (exception.retry);
4207 out:
4208         return err;
4209 }
4210
4211 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4212 {
4213         struct nfs_inode *nfsi = NFS_I(state->inode);
4214         unsigned char fl_flags = request->fl_flags;
4215         int status = -ENOLCK;
4216
4217         if ((fl_flags & FL_POSIX) &&
4218                         !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4219                 goto out;
4220         /* Is this a delegated open? */
4221         status = nfs4_set_lock_state(state, request);
4222         if (status != 0)
4223                 goto out;
4224         request->fl_flags |= FL_ACCESS;
4225         status = do_vfs_lock(request->fl_file, request);
4226         if (status < 0)
4227                 goto out;
4228         down_read(&nfsi->rwsem);
4229         if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4230                 /* Yes: cache locks! */
4231                 /* ...but avoid races with delegation recall... */
4232                 request->fl_flags = fl_flags & ~FL_SLEEP;
4233                 status = do_vfs_lock(request->fl_file, request);
4234                 goto out_unlock;
4235         }
4236         status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4237         if (status != 0)
4238                 goto out_unlock;
4239         /* Note: we always want to sleep here! */
4240         request->fl_flags = fl_flags | FL_SLEEP;
4241         if (do_vfs_lock(request->fl_file, request) < 0)
4242                 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4243 out_unlock:
4244         up_read(&nfsi->rwsem);
4245 out:
4246         request->fl_flags = fl_flags;
4247         return status;
4248 }
4249
4250 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4251 {
4252         struct nfs4_exception exception = { };
4253         int err;
4254
4255         do {
4256                 err = _nfs4_proc_setlk(state, cmd, request);
4257                 if (err == -NFS4ERR_DENIED)
4258                         err = -EAGAIN;
4259                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4260                                 err, &exception);
4261         } while (exception.retry);
4262         return err;
4263 }
4264
4265 static int
4266 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4267 {
4268         struct nfs_open_context *ctx;
4269         struct nfs4_state *state;
4270         unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4271         int status;
4272
4273         /* verify open state */
4274         ctx = nfs_file_open_context(filp);
4275         state = ctx->state;
4276
4277         if (request->fl_start < 0 || request->fl_end < 0)
4278                 return -EINVAL;
4279
4280         if (IS_GETLK(cmd)) {
4281                 if (state != NULL)
4282                         return nfs4_proc_getlk(state, F_GETLK, request);
4283                 return 0;
4284         }
4285
4286         if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4287                 return -EINVAL;
4288
4289         if (request->fl_type == F_UNLCK) {
4290                 if (state != NULL)
4291                         return nfs4_proc_unlck(state, cmd, request);
4292                 return 0;
4293         }
4294
4295         if (state == NULL)
4296                 return -ENOLCK;
4297         do {
4298                 status = nfs4_proc_setlk(state, cmd, request);
4299                 if ((status != -EAGAIN) || IS_SETLK(cmd))
4300                         break;
4301                 timeout = nfs4_set_lock_task_retry(timeout);
4302                 status = -ERESTARTSYS;
4303                 if (signalled())
4304                         break;
4305         } while(status < 0);
4306         return status;
4307 }
4308
4309 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4310 {
4311         struct nfs_server *server = NFS_SERVER(state->inode);
4312         struct nfs4_exception exception = { };
4313         int err;
4314
4315         err = nfs4_set_lock_state(state, fl);
4316         if (err != 0)
4317                 goto out;
4318         do {
4319                 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4320                 switch (err) {
4321                         default:
4322                                 printk(KERN_ERR "%s: unhandled error %d.\n",
4323                                                 __func__, err);
4324                         case 0:
4325                         case -ESTALE:
4326                                 goto out;
4327                         case -NFS4ERR_EXPIRED:
4328                         case -NFS4ERR_STALE_CLIENTID:
4329                         case -NFS4ERR_STALE_STATEID:
4330                         case -NFS4ERR_BADSESSION:
4331                         case -NFS4ERR_BADSLOT:
4332                         case -NFS4ERR_BAD_HIGH_SLOT:
4333                         case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4334                         case -NFS4ERR_DEADSESSION:
4335                                 nfs4_schedule_state_recovery(server->nfs_client);
4336                                 goto out;
4337                         case -ERESTARTSYS:
4338                                 /*
4339                                  * The show must go on: exit, but mark the
4340                                  * stateid as needing recovery.
4341                                  */
4342                         case -NFS4ERR_ADMIN_REVOKED:
4343                         case -NFS4ERR_BAD_STATEID:
4344                         case -NFS4ERR_OPENMODE:
4345                                 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4346                                 err = 0;
4347                                 goto out;
4348                         case -EKEYEXPIRED:
4349                                 /*
4350                                  * User RPCSEC_GSS context has expired.
4351                                  * We cannot recover this stateid now, so
4352                                  * skip it and allow recovery thread to
4353                                  * proceed.
4354                                  */
4355                                 err = 0;
4356                                 goto out;
4357                         case -ENOMEM:
4358                         case -NFS4ERR_DENIED:
4359                                 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4360                                 err = 0;
4361                                 goto out;
4362                         case -NFS4ERR_DELAY:
4363                                 break;
4364                 }
4365                 err = nfs4_handle_exception(server, err, &exception);
4366         } while (exception.retry);
4367 out:
4368         return err;
4369 }
4370
4371 static void nfs4_release_lockowner_release(void *calldata)
4372 {
4373         kfree(calldata);
4374 }
4375
4376 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4377         .rpc_release = nfs4_release_lockowner_release,
4378 };
4379
4380 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4381 {
4382         struct nfs_server *server = lsp->ls_state->owner->so_server;
4383         struct nfs_release_lockowner_args *args;
4384         struct rpc_message msg = {
4385                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4386         };
4387
4388         if (server->nfs_client->cl_mvops->minor_version != 0)
4389                 return;
4390         args = kmalloc(sizeof(*args), GFP_NOFS);
4391         if (!args)
4392                 return;
4393         args->lock_owner.clientid = server->nfs_client->cl_clientid;
4394         args->lock_owner.id = lsp->ls_id.id;
4395         msg.rpc_argp = args;
4396         rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4397 }
4398
4399 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4400
4401 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4402                 size_t buflen, int flags)
4403 {
4404         struct inode *inode = dentry->d_inode;
4405
4406         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4407                 return -EOPNOTSUPP;
4408
4409         return nfs4_proc_set_acl(inode, buf, buflen);
4410 }
4411
4412 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4413  * and that's what we'll do for e.g. user attributes that haven't been set.
4414  * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4415  * attributes in kernel-managed attribute namespaces. */
4416 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4417                 size_t buflen)
4418 {
4419         struct inode *inode = dentry->d_inode;
4420
4421         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4422                 return -EOPNOTSUPP;
4423
4424         return nfs4_proc_get_acl(inode, buf, buflen);
4425 }
4426
4427 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4428 {
4429         size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4430
4431         if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4432                 return 0;
4433         if (buf && buflen < len)
4434                 return -ERANGE;
4435         if (buf)
4436                 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4437         return len;
4438 }
4439
4440 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4441 {
4442         if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4443                 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4444                 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4445                 return;
4446
4447         fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4448                 NFS_ATTR_FATTR_NLINK;
4449         fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4450         fattr->nlink = 2;
4451 }
4452
4453 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4454                 struct nfs4_fs_locations *fs_locations, struct page *page)
4455 {
4456         struct nfs_server *server = NFS_SERVER(dir);
4457         u32 bitmask[2] = {
4458                 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4459                 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4460         };
4461         struct nfs4_fs_locations_arg args = {
4462                 .dir_fh = NFS_FH(dir),
4463                 .name = name,
4464                 .page = page,
4465                 .bitmask = bitmask,
4466         };
4467         struct nfs4_fs_locations_res res = {
4468                 .fs_locations = fs_locations,
4469         };
4470         struct rpc_message msg = {
4471                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4472                 .rpc_argp = &args,
4473                 .rpc_resp = &res,
4474         };
4475         int status;
4476
4477         dprintk("%s: start\n", __func__);
4478         nfs_fattr_init(&fs_locations->fattr);
4479         fs_locations->server = server;
4480         fs_locations->nlocations = 0;
4481         status = nfs4_call_sync(server, &msg, &args, &res, 0);
4482         nfs_fixup_referral_attributes(&fs_locations->fattr);
4483         dprintk("%s: returned status = %d\n", __func__, status);
4484         return status;
4485 }
4486
4487 #ifdef CONFIG_NFS_V4_1
4488 /*
4489  * nfs4_proc_exchange_id()
4490  *
4491  * Since the clientid has expired, all compounds using sessions
4492  * associated with the stale clientid will be returning
4493  * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4494  * be in some phase of session reset.
4495  */
4496 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4497 {
4498         nfs4_verifier verifier;
4499         struct nfs41_exchange_id_args args = {
4500                 .client = clp,
4501                 .flags = clp->cl_exchange_flags,
4502         };
4503         struct nfs41_exchange_id_res res = {
4504                 .client = clp,
4505         };
4506         int status;
4507         struct rpc_message msg = {
4508                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4509                 .rpc_argp = &args,
4510                 .rpc_resp = &res,
4511                 .rpc_cred = cred,
4512         };
4513         __be32 *p;
4514
4515         dprintk("--> %s\n", __func__);
4516         BUG_ON(clp == NULL);
4517
4518         /* Remove server-only flags */
4519         args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4520
4521         p = (u32 *)verifier.data;
4522         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4523         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4524         args.verifier = &verifier;
4525
4526         while (1) {
4527                 args.id_len = scnprintf(args.id, sizeof(args.id),
4528                                         "%s/%s %u",
4529                                         clp->cl_ipaddr,
4530                                         rpc_peeraddr2str(clp->cl_rpcclient,
4531                                                          RPC_DISPLAY_ADDR),
4532                                         clp->cl_id_uniquifier);
4533
4534                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4535
4536                 if (status != -NFS4ERR_CLID_INUSE)
4537                         break;
4538
4539                 if (signalled())
4540                         break;
4541
4542                 if (++clp->cl_id_uniquifier == 0)
4543                         break;
4544         }
4545
4546         dprintk("<-- %s status= %d\n", __func__, status);
4547         return status;
4548 }
4549
4550 struct nfs4_get_lease_time_data {
4551         struct nfs4_get_lease_time_args *args;
4552         struct nfs4_get_lease_time_res *res;
4553         struct nfs_client *clp;
4554 };
4555
4556 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4557                                         void *calldata)
4558 {
4559         int ret;
4560         struct nfs4_get_lease_time_data *data =
4561                         (struct nfs4_get_lease_time_data *)calldata;
4562
4563         dprintk("--> %s\n", __func__);
4564         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4565         /* just setup sequence, do not trigger session recovery
4566            since we're invoked within one */
4567         ret = nfs41_setup_sequence(data->clp->cl_session,
4568                                    &data->args->la_seq_args,
4569                                    &data->res->lr_seq_res, 0, task);
4570
4571         BUG_ON(ret == -EAGAIN);
4572         rpc_call_start(task);
4573         dprintk("<-- %s\n", __func__);
4574 }
4575
4576 /*
4577  * Called from nfs4_state_manager thread for session setup, so don't recover
4578  * from sequence operation or clientid errors.
4579  */
4580 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4581 {
4582         struct nfs4_get_lease_time_data *data =
4583                         (struct nfs4_get_lease_time_data *)calldata;
4584
4585         dprintk("--> %s\n", __func__);
4586         if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4587                 return;
4588         switch (task->tk_status) {
4589         case -NFS4ERR_DELAY:
4590         case -NFS4ERR_GRACE:
4591                 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4592                 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4593                 task->tk_status = 0;
4594                 nfs_restart_rpc(task, data->clp);
4595                 return;
4596         }
4597         dprintk("<-- %s\n", __func__);
4598 }
4599
4600 struct rpc_call_ops nfs4_get_lease_time_ops = {
4601         .rpc_call_prepare = nfs4_get_lease_time_prepare,
4602         .rpc_call_done = nfs4_get_lease_time_done,
4603 };
4604
4605 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4606 {
4607         struct rpc_task *task;
4608         struct nfs4_get_lease_time_args args;
4609         struct nfs4_get_lease_time_res res = {
4610                 .lr_fsinfo = fsinfo,
4611         };
4612         struct nfs4_get_lease_time_data data = {
4613                 .args = &args,
4614                 .res = &res,
4615                 .clp = clp,
4616         };
4617         struct rpc_message msg = {
4618                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4619                 .rpc_argp = &args,
4620                 .rpc_resp = &res,
4621         };
4622         struct rpc_task_setup task_setup = {
4623                 .rpc_client = clp->cl_rpcclient,
4624                 .rpc_message = &msg,
4625                 .callback_ops = &nfs4_get_lease_time_ops,
4626                 .callback_data = &data
4627         };
4628         int status;
4629
4630         dprintk("--> %s\n", __func__);
4631         task = rpc_run_task(&task_setup);
4632
4633         if (IS_ERR(task))
4634                 status = PTR_ERR(task);
4635         else {
4636                 status = task->tk_status;
4637                 rpc_put_task(task);
4638         }
4639         dprintk("<-- %s return %d\n", __func__, status);
4640
4641         return status;
4642 }
4643
4644 /*
4645  * Reset a slot table
4646  */
4647 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4648                                  int ivalue)
4649 {
4650         struct nfs4_slot *new = NULL;
4651         int i;
4652         int ret = 0;
4653
4654         dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4655                 max_reqs, tbl->max_slots);
4656
4657         /* Does the newly negotiated max_reqs match the existing slot table? */
4658         if (max_reqs != tbl->max_slots) {
4659                 ret = -ENOMEM;
4660                 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4661                               GFP_NOFS);
4662                 if (!new)
4663                         goto out;
4664                 ret = 0;
4665                 kfree(tbl->slots);
4666         }
4667         spin_lock(&tbl->slot_tbl_lock);
4668         if (new) {
4669                 tbl->slots = new;
4670                 tbl->max_slots = max_reqs;
4671         }
4672         for (i = 0; i < tbl->max_slots; ++i)
4673                 tbl->slots[i].seq_nr = ivalue;
4674         spin_unlock(&tbl->slot_tbl_lock);
4675         dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4676                 tbl, tbl->slots, tbl->max_slots);
4677 out:
4678         dprintk("<-- %s: return %d\n", __func__, ret);
4679         return ret;
4680 }
4681
4682 /*
4683  * Reset the forechannel and backchannel slot tables
4684  */
4685 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4686 {
4687         int status;
4688
4689         status = nfs4_reset_slot_table(&session->fc_slot_table,
4690                         session->fc_attrs.max_reqs, 1);
4691         if (status)
4692                 return status;
4693
4694         status = nfs4_reset_slot_table(&session->bc_slot_table,
4695                         session->bc_attrs.max_reqs, 0);
4696         return status;
4697 }
4698
4699 /* Destroy the slot table */
4700 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4701 {
4702         if (session->fc_slot_table.slots != NULL) {
4703                 kfree(session->fc_slot_table.slots);
4704                 session->fc_slot_table.slots = NULL;
4705         }
4706         if (session->bc_slot_table.slots != NULL) {
4707                 kfree(session->bc_slot_table.slots);
4708                 session->bc_slot_table.slots = NULL;
4709         }
4710         return;
4711 }
4712
4713 /*
4714  * Initialize slot table
4715  */
4716 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4717                 int max_slots, int ivalue)
4718 {
4719         struct nfs4_slot *slot;
4720         int ret = -ENOMEM;
4721
4722         BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4723
4724         dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4725
4726         slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4727         if (!slot)
4728                 goto out;
4729         ret = 0;
4730
4731         spin_lock(&tbl->slot_tbl_lock);
4732         tbl->max_slots = max_slots;
4733         tbl->slots = slot;
4734         tbl->highest_used_slotid = -1;  /* no slot is currently used */
4735         spin_unlock(&tbl->slot_tbl_lock);
4736         dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4737                 tbl, tbl->slots, tbl->max_slots);
4738 out:
4739         dprintk("<-- %s: return %d\n", __func__, ret);
4740         return ret;
4741 }
4742
4743 /*
4744  * Initialize the forechannel and backchannel tables
4745  */
4746 static int nfs4_init_slot_tables(struct nfs4_session *session)
4747 {
4748         struct nfs4_slot_table *tbl;
4749         int status = 0;
4750
4751         tbl = &session->fc_slot_table;
4752         if (tbl->slots == NULL) {
4753                 status = nfs4_init_slot_table(tbl,
4754                                 session->fc_attrs.max_reqs, 1);
4755                 if (status)
4756                         return status;
4757         }
4758
4759         tbl = &session->bc_slot_table;
4760         if (tbl->slots == NULL) {
4761                 status = nfs4_init_slot_table(tbl,
4762                                 session->bc_attrs.max_reqs, 0);
4763                 if (status)
4764                         nfs4_destroy_slot_tables(session);
4765         }
4766
4767         return status;
4768 }
4769
4770 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4771 {
4772         struct nfs4_session *session;
4773         struct nfs4_slot_table *tbl;
4774
4775         session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4776         if (!session)
4777                 return NULL;
4778
4779         init_completion(&session->complete);
4780
4781         tbl = &session->fc_slot_table;
4782         tbl->highest_used_slotid = -1;
4783         spin_lock_init(&tbl->slot_tbl_lock);
4784         rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4785
4786         tbl = &session->bc_slot_table;
4787         tbl->highest_used_slotid = -1;
4788         spin_lock_init(&tbl->slot_tbl_lock);
4789         rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4790
4791         session->session_state = 1<<NFS4_SESSION_INITING;
4792
4793         session->clp = clp;
4794         return session;
4795 }
4796
4797 void nfs4_destroy_session(struct nfs4_session *session)
4798 {
4799         nfs4_proc_destroy_session(session);
4800         dprintk("%s Destroy backchannel for xprt %p\n",
4801                 __func__, session->clp->cl_rpcclient->cl_xprt);
4802         xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4803                                 NFS41_BC_MIN_CALLBACKS);
4804         nfs4_destroy_slot_tables(session);
4805         kfree(session);
4806 }
4807
4808 /*
4809  * Initialize the values to be used by the client in CREATE_SESSION
4810  * If nfs4_init_session set the fore channel request and response sizes,
4811  * use them.
4812  *
4813  * Set the back channel max_resp_sz_cached to zero to force the client to
4814  * always set csa_cachethis to FALSE because the current implementation
4815  * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4816  */
4817 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4818 {
4819         struct nfs4_session *session = args->client->cl_session;
4820         unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4821                      mxresp_sz = session->fc_attrs.max_resp_sz;
4822
4823         if (mxrqst_sz == 0)
4824                 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4825         if (mxresp_sz == 0)
4826                 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4827         /* Fore channel attributes */
4828         args->fc_attrs.headerpadsz = 0;
4829         args->fc_attrs.max_rqst_sz = mxrqst_sz;
4830         args->fc_attrs.max_resp_sz = mxresp_sz;
4831         args->fc_attrs.max_ops = NFS4_MAX_OPS;
4832         args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4833
4834         dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4835                 "max_ops=%u max_reqs=%u\n",
4836                 __func__,
4837                 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4838                 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4839
4840         /* Back channel attributes */
4841         args->bc_attrs.headerpadsz = 0;
4842         args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4843         args->bc_attrs.max_resp_sz = PAGE_SIZE;
4844         args->bc_attrs.max_resp_sz_cached = 0;
4845         args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4846         args->bc_attrs.max_reqs = 1;
4847
4848         dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4849                 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4850                 __func__,
4851                 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4852                 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4853                 args->bc_attrs.max_reqs);
4854 }
4855
4856 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4857 {
4858         struct nfs4_channel_attrs *sent = &args->fc_attrs;
4859         struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4860
4861         if (rcvd->headerpadsz > sent->headerpadsz)
4862                 return -EINVAL;
4863         if (rcvd->max_resp_sz > sent->max_resp_sz)
4864                 return -EINVAL;
4865         /*
4866          * Our requested max_ops is the minimum we need; we're not
4867          * prepared to break up compounds into smaller pieces than that.
4868          * So, no point even trying to continue if the server won't
4869          * cooperate:
4870          */
4871         if (rcvd->max_ops < sent->max_ops)
4872                 return -EINVAL;
4873         if (rcvd->max_reqs == 0)
4874                 return -EINVAL;
4875         return 0;
4876 }
4877
4878 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4879 {
4880         struct nfs4_channel_attrs *sent = &args->bc_attrs;
4881         struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
4882
4883         if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4884                 return -EINVAL;
4885         if (rcvd->max_resp_sz < sent->max_resp_sz)
4886                 return -EINVAL;
4887         if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4888                 return -EINVAL;
4889         /* These would render the backchannel useless: */
4890         if (rcvd->max_ops  == 0)
4891                 return -EINVAL;
4892         if (rcvd->max_reqs == 0)
4893                 return -EINVAL;
4894         return 0;
4895 }
4896
4897 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4898                                      struct nfs4_session *session)
4899 {
4900         int ret;
4901
4902         ret = nfs4_verify_fore_channel_attrs(args, session);
4903         if (ret)
4904                 return ret;
4905         return nfs4_verify_back_channel_attrs(args, session);
4906 }
4907
4908 static int _nfs4_proc_create_session(struct nfs_client *clp)
4909 {
4910         struct nfs4_session *session = clp->cl_session;
4911         struct nfs41_create_session_args args = {
4912                 .client = clp,
4913                 .cb_program = NFS4_CALLBACK,
4914         };
4915         struct nfs41_create_session_res res = {
4916                 .client = clp,
4917         };
4918         struct rpc_message msg = {
4919                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4920                 .rpc_argp = &args,
4921                 .rpc_resp = &res,
4922         };
4923         int status;
4924
4925         nfs4_init_channel_attrs(&args);
4926         args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4927
4928         status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4929
4930         if (!status)
4931                 /* Verify the session's negotiated channel_attrs values */
4932                 status = nfs4_verify_channel_attrs(&args, session);
4933         if (!status) {
4934                 /* Increment the clientid slot sequence id */
4935                 clp->cl_seqid++;
4936         }
4937
4938         return status;
4939 }
4940
4941 /*
4942  * Issues a CREATE_SESSION operation to the server.
4943  * It is the responsibility of the caller to verify the session is
4944  * expired before calling this routine.
4945  */
4946 int nfs4_proc_create_session(struct nfs_client *clp)
4947 {
4948         int status;
4949         unsigned *ptr;
4950         struct nfs4_session *session = clp->cl_session;
4951
4952         dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4953
4954         status = _nfs4_proc_create_session(clp);
4955         if (status)
4956                 goto out;
4957
4958         /* Init and reset the fore channel */
4959         status = nfs4_init_slot_tables(session);
4960         dprintk("slot table initialization returned %d\n", status);
4961         if (status)
4962                 goto out;
4963         status = nfs4_reset_slot_tables(session);
4964         dprintk("slot table reset returned %d\n", status);
4965         if (status)
4966                 goto out;
4967
4968         ptr = (unsigned *)&session->sess_id.data[0];
4969         dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4970                 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4971 out:
4972         dprintk("<-- %s\n", __func__);
4973         return status;
4974 }
4975
4976 /*
4977  * Issue the over-the-wire RPC DESTROY_SESSION.
4978  * The caller must serialize access to this routine.
4979  */
4980 int nfs4_proc_destroy_session(struct nfs4_session *session)
4981 {
4982         int status = 0;
4983         struct rpc_message msg;
4984
4985         dprintk("--> nfs4_proc_destroy_session\n");
4986
4987         /* session is still being setup */
4988         if (session->clp->cl_cons_state != NFS_CS_READY)
4989                 return status;
4990
4991         msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4992         msg.rpc_argp = session;
4993         msg.rpc_resp = NULL;
4994         msg.rpc_cred = NULL;
4995         status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4996
4997         if (status)
4998                 printk(KERN_WARNING
4999                         "Got error %d from the server on DESTROY_SESSION. "
5000                         "Session has been destroyed regardless...\n", status);
5001
5002         dprintk("<-- nfs4_proc_destroy_session\n");
5003         return status;
5004 }
5005
5006 int nfs4_init_session(struct nfs_server *server)
5007 {
5008         struct nfs_client *clp = server->nfs_client;
5009         struct nfs4_session *session;
5010         unsigned int rsize, wsize;
5011         int ret;
5012
5013         if (!nfs4_has_session(clp))
5014                 return 0;
5015
5016         session = clp->cl_session;
5017         if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5018                 return 0;
5019
5020         rsize = server->rsize;
5021         if (rsize == 0)
5022                 rsize = NFS_MAX_FILE_IO_SIZE;
5023         wsize = server->wsize;
5024         if (wsize == 0)
5025                 wsize = NFS_MAX_FILE_IO_SIZE;
5026
5027         session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5028         session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5029
5030         ret = nfs4_recover_expired_lease(server);
5031         if (!ret)
5032                 ret = nfs4_check_client_ready(clp);
5033         return ret;
5034 }
5035
5036 /*
5037  * Renew the cl_session lease.
5038  */
5039 struct nfs4_sequence_data {
5040         struct nfs_client *clp;
5041         struct nfs4_sequence_args args;
5042         struct nfs4_sequence_res res;
5043 };
5044
5045 static void nfs41_sequence_release(void *data)
5046 {
5047         struct nfs4_sequence_data *calldata = data;
5048         struct nfs_client *clp = calldata->clp;
5049
5050         if (atomic_read(&clp->cl_count) > 1)
5051                 nfs4_schedule_state_renewal(clp);
5052         nfs_put_client(clp);
5053         kfree(calldata);
5054 }
5055
5056 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5057 {
5058         switch(task->tk_status) {
5059         case -NFS4ERR_DELAY:
5060                 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5061                 return -EAGAIN;
5062         default:
5063                 nfs4_schedule_state_recovery(clp);
5064         }
5065         return 0;
5066 }
5067
5068 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5069 {
5070         struct nfs4_sequence_data *calldata = data;
5071         struct nfs_client *clp = calldata->clp;
5072
5073         if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5074                 return;
5075
5076         if (task->tk_status < 0) {
5077                 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5078                 if (atomic_read(&clp->cl_count) == 1)
5079                         goto out;
5080
5081                 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5082                         rpc_restart_call_prepare(task);
5083                         return;
5084                 }
5085         }
5086         dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5087 out:
5088         dprintk("<-- %s\n", __func__);
5089 }
5090
5091 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5092 {
5093         struct nfs4_sequence_data *calldata = data;
5094         struct nfs_client *clp = calldata->clp;
5095         struct nfs4_sequence_args *args;
5096         struct nfs4_sequence_res *res;
5097
5098         args = task->tk_msg.rpc_argp;
5099         res = task->tk_msg.rpc_resp;
5100
5101         if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5102                 return;
5103         rpc_call_start(task);
5104 }
5105
5106 static const struct rpc_call_ops nfs41_sequence_ops = {
5107         .rpc_call_done = nfs41_sequence_call_done,
5108         .rpc_call_prepare = nfs41_sequence_prepare,
5109         .rpc_release = nfs41_sequence_release,
5110 };
5111
5112 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5113 {
5114         struct nfs4_sequence_data *calldata;
5115         struct rpc_message msg = {
5116                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5117                 .rpc_cred = cred,
5118         };
5119         struct rpc_task_setup task_setup_data = {
5120                 .rpc_client = clp->cl_rpcclient,
5121                 .rpc_message = &msg,
5122                 .callback_ops = &nfs41_sequence_ops,
5123                 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5124         };
5125
5126         if (!atomic_inc_not_zero(&clp->cl_count))
5127                 return ERR_PTR(-EIO);
5128         calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5129         if (calldata == NULL) {
5130                 nfs_put_client(clp);
5131                 return ERR_PTR(-ENOMEM);
5132         }
5133         msg.rpc_argp = &calldata->args;
5134         msg.rpc_resp = &calldata->res;
5135         calldata->clp = clp;
5136         task_setup_data.callback_data = calldata;
5137
5138         return rpc_run_task(&task_setup_data);
5139 }
5140
5141 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5142 {
5143         struct rpc_task *task;
5144         int ret = 0;
5145
5146         task = _nfs41_proc_sequence(clp, cred);
5147         if (IS_ERR(task))
5148                 ret = PTR_ERR(task);
5149         else
5150                 rpc_put_task(task);
5151         dprintk("<-- %s status=%d\n", __func__, ret);
5152         return ret;
5153 }
5154
5155 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5156 {
5157         struct rpc_task *task;
5158         int ret;
5159
5160         task = _nfs41_proc_sequence(clp, cred);
5161         if (IS_ERR(task)) {
5162                 ret = PTR_ERR(task);
5163                 goto out;
5164         }
5165         ret = rpc_wait_for_completion_task(task);
5166         if (!ret)
5167                 ret = task->tk_status;
5168         rpc_put_task(task);
5169 out:
5170         dprintk("<-- %s status=%d\n", __func__, ret);
5171         return ret;
5172 }
5173
5174 struct nfs4_reclaim_complete_data {
5175         struct nfs_client *clp;
5176         struct nfs41_reclaim_complete_args arg;
5177         struct nfs41_reclaim_complete_res res;
5178 };
5179
5180 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5181 {
5182         struct nfs4_reclaim_complete_data *calldata = data;
5183
5184         rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5185         if (nfs41_setup_sequence(calldata->clp->cl_session,
5186                                 &calldata->arg.seq_args,
5187                                 &calldata->res.seq_res, 0, task))
5188                 return;
5189
5190         rpc_call_start(task);
5191 }
5192
5193 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5194 {
5195         switch(task->tk_status) {
5196         case 0:
5197         case -NFS4ERR_COMPLETE_ALREADY:
5198         case -NFS4ERR_WRONG_CRED: /* What to do here? */
5199                 break;
5200         case -NFS4ERR_DELAY:
5201                 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5202                 return -EAGAIN;
5203         default:
5204                 nfs4_schedule_state_recovery(clp);
5205         }
5206         return 0;
5207 }
5208
5209 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5210 {
5211         struct nfs4_reclaim_complete_data *calldata = data;
5212         struct nfs_client *clp = calldata->clp;
5213         struct nfs4_sequence_res *res = &calldata->res.seq_res;
5214
5215         dprintk("--> %s\n", __func__);
5216         if (!nfs41_sequence_done(task, res))
5217                 return;
5218
5219         if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5220                 rpc_restart_call_prepare(task);
5221                 return;
5222         }
5223         dprintk("<-- %s\n", __func__);
5224 }
5225
5226 static void nfs4_free_reclaim_complete_data(void *data)
5227 {
5228         struct nfs4_reclaim_complete_data *calldata = data;
5229
5230         kfree(calldata);
5231 }
5232
5233 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5234         .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5235         .rpc_call_done = nfs4_reclaim_complete_done,
5236         .rpc_release = nfs4_free_reclaim_complete_data,
5237 };
5238
5239 /*
5240  * Issue a global reclaim complete.
5241  */
5242 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5243 {
5244         struct nfs4_reclaim_complete_data *calldata;
5245         struct rpc_task *task;
5246         struct rpc_message msg = {
5247                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5248         };
5249         struct rpc_task_setup task_setup_data = {
5250                 .rpc_client = clp->cl_rpcclient,
5251                 .rpc_message = &msg,
5252                 .callback_ops = &nfs4_reclaim_complete_call_ops,
5253                 .flags = RPC_TASK_ASYNC,
5254         };
5255         int status = -ENOMEM;
5256
5257         dprintk("--> %s\n", __func__);
5258         calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5259         if (calldata == NULL)
5260                 goto out;
5261         calldata->clp = clp;
5262         calldata->arg.one_fs = 0;
5263
5264         msg.rpc_argp = &calldata->arg;
5265         msg.rpc_resp = &calldata->res;
5266         task_setup_data.callback_data = calldata;
5267         task = rpc_run_task(&task_setup_data);
5268         if (IS_ERR(task)) {
5269                 status = PTR_ERR(task);
5270                 goto out;
5271         }
5272         rpc_put_task(task);
5273         return 0;
5274 out:
5275         dprintk("<-- %s status=%d\n", __func__, status);
5276         return status;
5277 }
5278
5279 static void
5280 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5281 {
5282         struct nfs4_layoutget *lgp = calldata;
5283         struct inode *ino = lgp->args.inode;
5284         struct nfs_server *server = NFS_SERVER(ino);
5285
5286         dprintk("--> %s\n", __func__);
5287         if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5288                                 &lgp->res.seq_res, 0, task))
5289                 return;
5290         rpc_call_start(task);
5291 }
5292
5293 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5294 {
5295         struct nfs4_layoutget *lgp = calldata;
5296         struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5297
5298         dprintk("--> %s\n", __func__);
5299
5300         if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5301                 return;
5302
5303         switch (task->tk_status) {
5304         case 0:
5305                 break;
5306         case -NFS4ERR_LAYOUTTRYLATER:
5307         case -NFS4ERR_RECALLCONFLICT:
5308                 task->tk_status = -NFS4ERR_DELAY;
5309                 /* Fall through */
5310         default:
5311                 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5312                         rpc_restart_call_prepare(task);
5313                         return;
5314                 }
5315         }
5316         lgp->status = task->tk_status;
5317         dprintk("<-- %s\n", __func__);
5318 }
5319
5320 static void nfs4_layoutget_release(void *calldata)
5321 {
5322         struct nfs4_layoutget *lgp = calldata;
5323
5324         dprintk("--> %s\n", __func__);
5325         put_layout_hdr(lgp->args.inode);
5326         if (lgp->res.layout.buf != NULL)
5327                 free_page((unsigned long) lgp->res.layout.buf);
5328         put_nfs_open_context(lgp->args.ctx);
5329         kfree(calldata);
5330         dprintk("<-- %s\n", __func__);
5331 }
5332
5333 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5334         .rpc_call_prepare = nfs4_layoutget_prepare,
5335         .rpc_call_done = nfs4_layoutget_done,
5336         .rpc_release = nfs4_layoutget_release,
5337 };
5338
5339 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5340 {
5341         struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5342         struct rpc_task *task;
5343         struct rpc_message msg = {
5344                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5345                 .rpc_argp = &lgp->args,
5346                 .rpc_resp = &lgp->res,
5347         };
5348         struct rpc_task_setup task_setup_data = {
5349                 .rpc_client = server->client,
5350                 .rpc_message = &msg,
5351                 .callback_ops = &nfs4_layoutget_call_ops,
5352                 .callback_data = lgp,
5353                 .flags = RPC_TASK_ASYNC,
5354         };
5355         int status = 0;
5356
5357         dprintk("--> %s\n", __func__);
5358
5359         lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5360         if (lgp->res.layout.buf == NULL) {
5361                 nfs4_layoutget_release(lgp);
5362                 return -ENOMEM;
5363         }
5364
5365         lgp->res.seq_res.sr_slot = NULL;
5366         task = rpc_run_task(&task_setup_data);
5367         if (IS_ERR(task))
5368                 return PTR_ERR(task);
5369         status = nfs4_wait_for_completion_rpc_task(task);
5370         if (status != 0)
5371                 goto out;
5372         status = lgp->status;
5373         if (status != 0)
5374                 goto out;
5375         status = pnfs_layout_process(lgp);
5376 out:
5377         rpc_put_task(task);
5378         dprintk("<-- %s status=%d\n", __func__, status);
5379         return status;
5380 }
5381
5382 static int
5383 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5384 {
5385         struct nfs4_getdeviceinfo_args args = {
5386                 .pdev = pdev,
5387         };
5388         struct nfs4_getdeviceinfo_res res = {
5389                 .pdev = pdev,
5390         };
5391         struct rpc_message msg = {
5392                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5393                 .rpc_argp = &args,
5394                 .rpc_resp = &res,
5395         };
5396         int status;
5397
5398         dprintk("--> %s\n", __func__);
5399         status = nfs4_call_sync(server, &msg, &args, &res, 0);
5400         dprintk("<-- %s status=%d\n", __func__, status);
5401
5402         return status;
5403 }
5404
5405 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5406 {
5407         struct nfs4_exception exception = { };
5408         int err;
5409
5410         do {
5411                 err = nfs4_handle_exception(server,
5412                                         _nfs4_proc_getdeviceinfo(server, pdev),
5413                                         &exception);
5414         } while (exception.retry);
5415         return err;
5416 }
5417 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5418
5419 #endif /* CONFIG_NFS_V4_1 */
5420
5421 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5422         .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5423         .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5424         .recover_open   = nfs4_open_reclaim,
5425         .recover_lock   = nfs4_lock_reclaim,
5426         .establish_clid = nfs4_init_clientid,
5427         .get_clid_cred  = nfs4_get_setclientid_cred,
5428 };
5429
5430 #if defined(CONFIG_NFS_V4_1)
5431 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5432         .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5433         .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5434         .recover_open   = nfs4_open_reclaim,
5435         .recover_lock   = nfs4_lock_reclaim,
5436         .establish_clid = nfs41_init_clientid,
5437         .get_clid_cred  = nfs4_get_exchange_id_cred,
5438         .reclaim_complete = nfs41_proc_reclaim_complete,
5439 };
5440 #endif /* CONFIG_NFS_V4_1 */
5441
5442 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5443         .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5444         .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5445         .recover_open   = nfs4_open_expired,
5446         .recover_lock   = nfs4_lock_expired,
5447         .establish_clid = nfs4_init_clientid,
5448         .get_clid_cred  = nfs4_get_setclientid_cred,
5449 };
5450
5451 #if defined(CONFIG_NFS_V4_1)
5452 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5453         .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5454         .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5455         .recover_open   = nfs4_open_expired,
5456         .recover_lock   = nfs4_lock_expired,
5457         .establish_clid = nfs41_init_clientid,
5458         .get_clid_cred  = nfs4_get_exchange_id_cred,
5459 };
5460 #endif /* CONFIG_NFS_V4_1 */
5461
5462 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5463         .sched_state_renewal = nfs4_proc_async_renew,
5464         .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5465         .renew_lease = nfs4_proc_renew,
5466 };
5467
5468 #if defined(CONFIG_NFS_V4_1)
5469 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5470         .sched_state_renewal = nfs41_proc_async_sequence,
5471         .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5472         .renew_lease = nfs4_proc_sequence,
5473 };
5474 #endif
5475
5476 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5477         .minor_version = 0,
5478         .call_sync = _nfs4_call_sync,
5479         .validate_stateid = nfs4_validate_delegation_stateid,
5480         .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5481         .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5482         .state_renewal_ops = &nfs40_state_renewal_ops,
5483 };
5484
5485 #if defined(CONFIG_NFS_V4_1)
5486 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5487         .minor_version = 1,
5488         .call_sync = _nfs4_call_sync_session,
5489         .validate_stateid = nfs41_validate_delegation_stateid,
5490         .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5491         .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5492         .state_renewal_ops = &nfs41_state_renewal_ops,
5493 };
5494 #endif
5495
5496 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5497         [0] = &nfs_v4_0_minor_ops,
5498 #if defined(CONFIG_NFS_V4_1)
5499         [1] = &nfs_v4_1_minor_ops,
5500 #endif
5501 };
5502
5503 static const struct inode_operations nfs4_file_inode_operations = {
5504         .permission     = nfs_permission,
5505         .getattr        = nfs_getattr,
5506         .setattr        = nfs_setattr,
5507         .getxattr       = nfs4_getxattr,
5508         .setxattr       = nfs4_setxattr,
5509         .listxattr      = nfs4_listxattr,
5510 };
5511
5512 const struct nfs_rpc_ops nfs_v4_clientops = {
5513         .version        = 4,                    /* protocol version */
5514         .dentry_ops     = &nfs4_dentry_operations,
5515         .dir_inode_ops  = &nfs4_dir_inode_operations,
5516         .file_inode_ops = &nfs4_file_inode_operations,
5517         .getroot        = nfs4_proc_get_root,
5518         .getattr        = nfs4_proc_getattr,
5519         .setattr        = nfs4_proc_setattr,
5520         .lookupfh       = nfs4_proc_lookupfh,
5521         .lookup         = nfs4_proc_lookup,
5522         .access         = nfs4_proc_access,
5523         .readlink       = nfs4_proc_readlink,
5524         .create         = nfs4_proc_create,
5525         .remove         = nfs4_proc_remove,
5526         .unlink_setup   = nfs4_proc_unlink_setup,
5527         .unlink_done    = nfs4_proc_unlink_done,
5528         .rename         = nfs4_proc_rename,
5529         .rename_setup   = nfs4_proc_rename_setup,
5530         .rename_done    = nfs4_proc_rename_done,
5531         .link           = nfs4_proc_link,
5532         .symlink        = nfs4_proc_symlink,
5533         .mkdir          = nfs4_proc_mkdir,
5534         .rmdir          = nfs4_proc_remove,
5535         .readdir        = nfs4_proc_readdir,
5536         .mknod          = nfs4_proc_mknod,
5537         .statfs         = nfs4_proc_statfs,
5538         .fsinfo         = nfs4_proc_fsinfo,
5539         .pathconf       = nfs4_proc_pathconf,
5540         .set_capabilities = nfs4_server_capabilities,
5541         .decode_dirent  = nfs4_decode_dirent,
5542         .read_setup     = nfs4_proc_read_setup,
5543         .read_done      = nfs4_read_done,
5544         .write_setup    = nfs4_proc_write_setup,
5545         .write_done     = nfs4_write_done,
5546         .commit_setup   = nfs4_proc_commit_setup,
5547         .commit_done    = nfs4_commit_done,
5548         .lock           = nfs4_proc_lock,
5549         .clear_acl_cache = nfs4_zap_acl_attr,
5550         .close_context  = nfs4_close_context,
5551         .open_context   = nfs4_atomic_open,
5552 };
5553
5554 /*
5555  * Local variables:
5556  *  c-basic-offset: 8
5557  * End:
5558  */