Pileus Git - ~andy/linux/blob - fs/nfs/nfs4proc.c

   1 /*
   2  *  fs/nfs/nfs4proc.c
   3  *
   4  *  Client-side procedure declarations for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/mm.h>
  39 #include <linux/utsname.h>
  40 #include <linux/delay.h>
  41 #include <linux/errno.h>
  42 #include <linux/string.h>
  43 #include <linux/sunrpc/clnt.h>
  44 #include <linux/nfs.h>
  45 #include <linux/nfs4.h>
  46 #include <linux/nfs_fs.h>
  47 #include <linux/nfs_page.h>
  48 #include <linux/smp_lock.h>
  49 #include <linux/namei.h>
  50 #include <linux/mount.h>
  51
  52 #include "nfs4_fs.h"
  53 #include "delegation.h"
  54 #include "iostat.h"
  55
  56 #define NFSDBG_FACILITY         NFSDBG_PROC
  57
  58 #define NFS4_POLL_RETRY_MIN     (HZ/10)
  59 #define NFS4_POLL_RETRY_MAX     (15*HZ)
  60
  61 struct nfs4_opendata;
  62 static int _nfs4_proc_open(struct nfs4_opendata *data);
  63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
  64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
  65 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
  66 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
  67 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
  68
  69 /* Prevent leaks of NFSv4 errors into userland */
  70 int nfs4_map_errors(int err)
  71 {
  72         if (err < -1000) {
  73                 dprintk("%s could not handle NFSv4 error %d\n",
  74                                 __FUNCTION__, -err);
  75                 return -EIO;
  76         }
  77         return err;
  78 }
  79
  80 /*
  81  * This is our standard bitmap for GETATTR requests.
  82  */
  83 const u32 nfs4_fattr_bitmap[2] = {
  84         FATTR4_WORD0_TYPE
  85         | FATTR4_WORD0_CHANGE
  86         | FATTR4_WORD0_SIZE
  87         | FATTR4_WORD0_FSID
  88         | FATTR4_WORD0_FILEID,
  89         FATTR4_WORD1_MODE
  90         | FATTR4_WORD1_NUMLINKS
  91         | FATTR4_WORD1_OWNER
  92         | FATTR4_WORD1_OWNER_GROUP
  93         | FATTR4_WORD1_RAWDEV
  94         | FATTR4_WORD1_SPACE_USED
  95         | FATTR4_WORD1_TIME_ACCESS
  96         | FATTR4_WORD1_TIME_METADATA
  97         | FATTR4_WORD1_TIME_MODIFY
  98 };
  99
 100 const u32 nfs4_statfs_bitmap[2] = {
 101         FATTR4_WORD0_FILES_AVAIL
 102         | FATTR4_WORD0_FILES_FREE
 103         | FATTR4_WORD0_FILES_TOTAL,
 104         FATTR4_WORD1_SPACE_AVAIL
 105         | FATTR4_WORD1_SPACE_FREE
 106         | FATTR4_WORD1_SPACE_TOTAL
 107 };
 108
 109 const u32 nfs4_pathconf_bitmap[2] = {
 110         FATTR4_WORD0_MAXLINK
 111         | FATTR4_WORD0_MAXNAME,
 112         0
 113 };
 114
 115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
 116                         | FATTR4_WORD0_MAXREAD
 117                         | FATTR4_WORD0_MAXWRITE
 118                         | FATTR4_WORD0_LEASE_TIME,
 119                         0
 120 };
 121
 122 const u32 nfs4_fs_locations_bitmap[2] = {
 123         FATTR4_WORD0_TYPE
 124         | FATTR4_WORD0_CHANGE
 125         | FATTR4_WORD0_SIZE
 126         | FATTR4_WORD0_FSID
 127         | FATTR4_WORD0_FILEID
 128         | FATTR4_WORD0_FS_LOCATIONS,
 129         FATTR4_WORD1_MODE
 130         | FATTR4_WORD1_NUMLINKS
 131         | FATTR4_WORD1_OWNER
 132         | FATTR4_WORD1_OWNER_GROUP
 133         | FATTR4_WORD1_RAWDEV
 134         | FATTR4_WORD1_SPACE_USED
 135         | FATTR4_WORD1_TIME_ACCESS
 136         | FATTR4_WORD1_TIME_METADATA
 137         | FATTR4_WORD1_TIME_MODIFY
 138         | FATTR4_WORD1_MOUNTED_ON_FILEID
 139 };
 140
 141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
 142                 struct nfs4_readdir_arg *readdir)
 143 {
 144         __be32 *start, *p;
 145
 146         BUG_ON(readdir->count < 80);
 147         if (cookie > 2) {
 148                 readdir->cookie = cookie;
 149                 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
 150                 return;
 151         }
 152
 153         readdir->cookie = 0;
 154         memset(&readdir->verifier, 0, sizeof(readdir->verifier));
 155         if (cookie == 2)
 156                 return;
 157
 158         /*
 159          * NFSv4 servers do not return entries for '.' and '..'
 160          * Therefore, we fake these entries here.  We let '.'
 161          * have cookie 0 and '..' have cookie 1.  Note that
 162          * when talking to the server, we always send cookie 0
 163          * instead of 1 or 2.
 164          */
 165         start = p = kmap_atomic(*readdir->pages, KM_USER0);
 166
 167         if (cookie == 0) {
 168                 *p++ = xdr_one;                                  /* next */
 169                 *p++ = xdr_zero;                   /* cookie, first word */
 170                 *p++ = xdr_one;                   /* cookie, second word */
 171                 *p++ = xdr_one;                             /* entry len */
 172                 memcpy(p, ".\0\0\0", 4);                        /* entry */
 173                 p++;
 174                 *p++ = xdr_one;                         /* bitmap length */
 175                 *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 176                 *p++ = htonl(8);              /* attribute buffer length */
 177                 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
 178         }
 179
 180         *p++ = xdr_one;                                  /* next */
 181         *p++ = xdr_zero;                   /* cookie, first word */
 182         *p++ = xdr_two;                   /* cookie, second word */
 183         *p++ = xdr_two;                             /* entry len */
 184         memcpy(p, "..\0\0", 4);                         /* entry */
 185         p++;
 186         *p++ = xdr_one;                         /* bitmap length */
 187         *p++ = htonl(FATTR4_WORD0_FILEID);             /* bitmap */
 188         *p++ = htonl(8);              /* attribute buffer length */
 189         p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
 190
 191         readdir->pgbase = (char *)p - (char *)start;
 192         readdir->count -= readdir->pgbase;
 193         kunmap_atomic(start, KM_USER0);
 194 }
 195
 196 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
 197 {
 198         struct nfs_client *clp = server->nfs_client;
 199         spin_lock(&clp->cl_lock);
 200         if (time_before(clp->cl_last_renewal,timestamp))
 201                 clp->cl_last_renewal = timestamp;
 202         spin_unlock(&clp->cl_lock);
 203 }
 204
 205 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
 206 {
 207         struct nfs_inode *nfsi = NFS_I(dir);
 208
 209         spin_lock(&dir->i_lock);
 210         nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
 211         if (cinfo->before == nfsi->change_attr && cinfo->atomic)
 212                 nfsi->change_attr = cinfo->after;
 213         spin_unlock(&dir->i_lock);
 214 }
 215
 216 struct nfs4_opendata {
 217         atomic_t count;
 218         struct nfs_openargs o_arg;
 219         struct nfs_openres o_res;
 220         struct nfs_open_confirmargs c_arg;
 221         struct nfs_open_confirmres c_res;
 222         struct nfs_fattr f_attr;
 223         struct nfs_fattr dir_attr;
 224         struct path path;
 225         struct dentry *dir;
 226         struct nfs4_state_owner *owner;
 227         struct iattr attrs;
 228         unsigned long timestamp;
 229         int rpc_status;
 230         int cancelled;
 231 };
 232
 233 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
 234                 struct nfs4_state_owner *sp, int flags,
 235                 const struct iattr *attrs)
 236 {
 237         struct dentry *parent = dget_parent(path->dentry);
 238         struct inode *dir = parent->d_inode;
 239         struct nfs_server *server = NFS_SERVER(dir);
 240         struct nfs4_opendata *p;
 241
 242         p = kzalloc(sizeof(*p), GFP_KERNEL);
 243         if (p == NULL)
 244                 goto err;
 245         p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
 246         if (p->o_arg.seqid == NULL)
 247                 goto err_free;
 248         atomic_set(&p->count, 1);
 249         p->path.mnt = mntget(path->mnt);
 250         p->path.dentry = dget(path->dentry);
 251         p->dir = parent;
 252         p->owner = sp;
 253         atomic_inc(&sp->so_count);
 254         p->o_arg.fh = NFS_FH(dir);
 255         p->o_arg.open_flags = flags,
 256         p->o_arg.clientid = server->nfs_client->cl_clientid;
 257         p->o_arg.id = sp->so_id;
 258         p->o_arg.name = &p->path.dentry->d_name;
 259         p->o_arg.server = server;
 260         p->o_arg.bitmask = server->attr_bitmask;
 261         p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
 262         p->o_res.f_attr = &p->f_attr;
 263         p->o_res.dir_attr = &p->dir_attr;
 264         p->o_res.server = server;
 265         nfs_fattr_init(&p->f_attr);
 266         nfs_fattr_init(&p->dir_attr);
 267         if (flags & O_EXCL) {
 268                 u32 *s = (u32 *) p->o_arg.u.verifier.data;
 269                 s[0] = jiffies;
 270                 s[1] = current->pid;
 271         } else if (flags & O_CREAT) {
 272                 p->o_arg.u.attrs = &p->attrs;
 273                 memcpy(&p->attrs, attrs, sizeof(p->attrs));
 274         }
 275         p->c_arg.fh = &p->o_res.fh;
 276         p->c_arg.stateid = &p->o_res.stateid;
 277         p->c_arg.seqid = p->o_arg.seqid;
 278         return p;
 279 err_free:
 280         kfree(p);
 281 err:
 282         dput(parent);
 283         return NULL;
 284 }
 285
 286 static void nfs4_opendata_free(struct nfs4_opendata *p)
 287 {
 288         if (p != NULL && atomic_dec_and_test(&p->count)) {
 289                 nfs_free_seqid(p->o_arg.seqid);
 290                 nfs4_put_state_owner(p->owner);
 291                 dput(p->dir);
 292                 dput(p->path.dentry);
 293                 mntput(p->path.mnt);
 294                 kfree(p);
 295         }
 296 }
 297
 298 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
 299 {
 300         sigset_t oldset;
 301         int ret;
 302
 303         rpc_clnt_sigmask(task->tk_client, &oldset);
 304         ret = rpc_wait_for_completion_task(task);
 305         rpc_clnt_sigunmask(task->tk_client, &oldset);
 306         return ret;
 307 }
 308
 309 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
 310 {
 311         switch (open_flags) {
 312                 case FMODE_WRITE:
 313                         state->n_wronly++;
 314                         break;
 315                 case FMODE_READ:
 316                         state->n_rdonly++;
 317                         break;
 318                 case FMODE_READ|FMODE_WRITE:
 319                         state->n_rdwr++;
 320         }
 321 }
 322
 323 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
 324 {
 325         struct inode *inode = state->inode;
 326
 327         open_flags &= (FMODE_READ|FMODE_WRITE);
 328         /* Protect against nfs4_find_state_byowner() */
 329         spin_lock(&state->owner->so_lock);
 330         spin_lock(&inode->i_lock);
 331         memcpy(&state->stateid, stateid, sizeof(state->stateid));
 332         update_open_stateflags(state, open_flags);
 333         nfs4_state_set_mode_locked(state, state->state | open_flags);
 334         spin_unlock(&inode->i_lock);
 335         spin_unlock(&state->owner->so_lock);
 336 }
 337
 338 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
 339 {
 340         struct inode *inode;
 341         struct nfs4_state *state = NULL;
 342
 343         if (!(data->f_attr.valid & NFS_ATTR_FATTR))
 344                 goto out;
 345         inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
 346         if (IS_ERR(inode))
 347                 goto out;
 348         state = nfs4_get_open_state(inode, data->owner);
 349         if (state == NULL)
 350                 goto put_inode;
 351         update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
 352 put_inode:
 353         iput(inode);
 354 out:
 355         return state;
 356 }
 357
 358 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
 359 {
 360         struct nfs_inode *nfsi = NFS_I(state->inode);
 361         struct nfs_open_context *ctx;
 362
 363         spin_lock(&state->inode->i_lock);
 364         list_for_each_entry(ctx, &nfsi->open_files, list) {
 365                 if (ctx->state != state)
 366                         continue;
 367                 get_nfs_open_context(ctx);
 368                 spin_unlock(&state->inode->i_lock);
 369                 return ctx;
 370         }
 371         spin_unlock(&state->inode->i_lock);
 372         return ERR_PTR(-ENOENT);
 373 }
 374
 375 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
 376 {
 377         int ret;
 378
 379         opendata->o_arg.open_flags = openflags;
 380         ret = _nfs4_proc_open(opendata);
 381         if (ret != 0)
 382                 return ret;
 383         memcpy(stateid->data, opendata->o_res.stateid.data,
 384                         sizeof(stateid->data));
 385         return 0;
 386 }
 387
 388 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
 389 {
 390         nfs4_stateid stateid;
 391         struct nfs4_state *newstate;
 392         int mode = 0;
 393         int delegation = 0;
 394         int ret;
 395
 396         /* memory barrier prior to reading state->n_* */
 397         smp_rmb();
 398         if (state->n_rdwr != 0) {
 399                 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
 400                 if (ret != 0)
 401                         return ret;
 402                 mode |= FMODE_READ|FMODE_WRITE;
 403                 if (opendata->o_res.delegation_type != 0)
 404                         delegation = opendata->o_res.delegation_type;
 405                 smp_rmb();
 406         }
 407         if (state->n_wronly != 0) {
 408                 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
 409                 if (ret != 0)
 410                         return ret;
 411                 mode |= FMODE_WRITE;
 412                 if (opendata->o_res.delegation_type != 0)
 413                         delegation = opendata->o_res.delegation_type;
 414                 smp_rmb();
 415         }
 416         if (state->n_rdonly != 0) {
 417                 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
 418                 if (ret != 0)
 419                         return ret;
 420                 mode |= FMODE_READ;
 421         }
 422         clear_bit(NFS_DELEGATED_STATE, &state->flags);
 423         if (mode == 0)
 424                 return 0;
 425         if (opendata->o_res.delegation_type == 0)
 426                 opendata->o_res.delegation_type = delegation;
 427         opendata->o_arg.open_flags |= mode;
 428         newstate = nfs4_opendata_to_nfs4_state(opendata);
 429         if (newstate != NULL) {
 430                 if (opendata->o_res.delegation_type != 0) {
 431                         struct nfs_inode *nfsi = NFS_I(newstate->inode);
 432                         int delegation_flags = 0;
 433                         if (nfsi->delegation)
 434                                 delegation_flags = nfsi->delegation->flags;
 435                         if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
 436                                 nfs_inode_set_delegation(newstate->inode,
 437                                                 opendata->owner->so_cred,
 438                                                 &opendata->o_res);
 439                         else
 440                                 nfs_inode_reclaim_delegation(newstate->inode,
 441                                                 opendata->owner->so_cred,
 442                                                 &opendata->o_res);
 443                 }
 444                 nfs4_close_state(&opendata->path, newstate, opendata->o_arg.open_flags);
 445         }
 446         if (newstate != state)
 447                 return -ESTALE;
 448         return 0;
 449 }
 450
 451 /*
 452  * OPEN_RECLAIM:
 453  *      reclaim state on the server after a reboot.
 454  */
 455 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
 456 {
 457         struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
 458         struct nfs4_opendata *opendata;
 459         int delegation_type = 0;
 460         int status;
 461
 462         if (delegation != NULL) {
 463                 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
 464                         memcpy(&state->stateid, &delegation->stateid,
 465                                         sizeof(state->stateid));
 466                         set_bit(NFS_DELEGATED_STATE, &state->flags);
 467                         return 0;
 468                 }
 469                 delegation_type = delegation->type;
 470         }
 471         opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
 472         if (opendata == NULL)
 473                 return -ENOMEM;
 474         opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
 475         opendata->o_arg.fh = NFS_FH(state->inode);
 476         nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
 477         opendata->o_arg.u.delegation_type = delegation_type;
 478         status = nfs4_open_recover(opendata, state);
 479         nfs4_opendata_free(opendata);
 480         return status;
 481 }
 482
 483 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
 484 {
 485         struct nfs_server *server = NFS_SERVER(state->inode);
 486         struct nfs4_exception exception = { };
 487         int err;
 488         do {
 489                 err = _nfs4_do_open_reclaim(ctx, state);
 490                 if (err != -NFS4ERR_DELAY)
 491                         break;
 492                 nfs4_handle_exception(server, err, &exception);
 493         } while (exception.retry);
 494         return err;
 495 }
 496
 497 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
 498 {
 499         struct nfs_open_context *ctx;
 500         int ret;
 501
 502         ctx = nfs4_state_find_open_context(state);
 503         if (IS_ERR(ctx))
 504                 return PTR_ERR(ctx);
 505         ret = nfs4_do_open_reclaim(ctx, state);
 506         put_nfs_open_context(ctx);
 507         return ret;
 508 }
 509
 510 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
 511 {
 512         struct nfs4_state_owner  *sp  = state->owner;
 513         struct nfs4_opendata *opendata;
 514         int ret;
 515
 516         if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
 517                 return 0;
 518         opendata = nfs4_opendata_alloc(&ctx->path, sp, 0, NULL);
 519         if (opendata == NULL)
 520                 return -ENOMEM;
 521         opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
 522         memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
 523                         sizeof(opendata->o_arg.u.delegation.data));
 524         ret = nfs4_open_recover(opendata, state);
 525         nfs4_opendata_free(opendata);
 526         return ret;
 527 }
 528
 529 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state)
 530 {
 531         struct nfs4_exception exception = { };
 532         struct nfs_server *server = NFS_SERVER(state->inode);
 533         int err;
 534         do {
 535                 err = _nfs4_open_delegation_recall(ctx, state);
 536                 switch (err) {
 537                         case 0:
 538                                 return err;
 539                         case -NFS4ERR_STALE_CLIENTID:
 540                         case -NFS4ERR_STALE_STATEID:
 541                         case -NFS4ERR_EXPIRED:
 542                                 /* Don't recall a delegation if it was lost */
 543                                 nfs4_schedule_state_recovery(server->nfs_client);
 544                                 return err;
 545                 }
 546                 err = nfs4_handle_exception(server, err, &exception);
 547         } while (exception.retry);
 548         return err;
 549 }
 550
 551 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
 552 {
 553         struct nfs4_opendata *data = calldata;
 554         struct  rpc_message msg = {
 555                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
 556                 .rpc_argp = &data->c_arg,
 557                 .rpc_resp = &data->c_res,
 558                 .rpc_cred = data->owner->so_cred,
 559         };
 560         data->timestamp = jiffies;
 561         rpc_call_setup(task, &msg, 0);
 562 }
 563
 564 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
 565 {
 566         struct nfs4_opendata *data = calldata;
 567
 568         data->rpc_status = task->tk_status;
 569         if (RPC_ASSASSINATED(task))
 570                 return;
 571         if (data->rpc_status == 0) {
 572                 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
 573                                 sizeof(data->o_res.stateid.data));
 574                 renew_lease(data->o_res.server, data->timestamp);
 575         }
 576         nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
 577         nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
 578 }
 579
 580 static void nfs4_open_confirm_release(void *calldata)
 581 {
 582         struct nfs4_opendata *data = calldata;
 583         struct nfs4_state *state = NULL;
 584
 585         /* If this request hasn't been cancelled, do nothing */
 586         if (data->cancelled == 0)
 587                 goto out_free;
 588         /* In case of error, no cleanup! */
 589         if (data->rpc_status != 0)
 590                 goto out_free;
 591         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 592         state = nfs4_opendata_to_nfs4_state(data);
 593         if (state != NULL)
 594                 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
 595 out_free:
 596         nfs4_opendata_free(data);
 597 }
 598
 599 static const struct rpc_call_ops nfs4_open_confirm_ops = {
 600         .rpc_call_prepare = nfs4_open_confirm_prepare,
 601         .rpc_call_done = nfs4_open_confirm_done,
 602         .rpc_release = nfs4_open_confirm_release,
 603 };
 604
 605 /*
 606  * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
 607  */
 608 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
 609 {
 610         struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
 611         struct rpc_task *task;
 612         int status;
 613
 614         atomic_inc(&data->count);
 615         /*
 616          * If rpc_run_task() ends up calling ->rpc_release(), we
 617          * want to ensure that it takes the 'error' code path.
 618          */
 619         data->rpc_status = -ENOMEM;
 620         task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
 621         if (IS_ERR(task))
 622                 return PTR_ERR(task);
 623         status = nfs4_wait_for_completion_rpc_task(task);
 624         if (status != 0) {
 625                 data->cancelled = 1;
 626                 smp_wmb();
 627         } else
 628                 status = data->rpc_status;
 629         rpc_put_task(task);
 630         return status;
 631 }
 632
 633 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
 634 {
 635         struct nfs4_opendata *data = calldata;
 636         struct nfs4_state_owner *sp = data->owner;
 637         struct rpc_message msg = {
 638                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
 639                 .rpc_argp = &data->o_arg,
 640                 .rpc_resp = &data->o_res,
 641                 .rpc_cred = sp->so_cred,
 642         };
 643
 644         if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
 645                 return;
 646         /* Update sequence id. */
 647         data->o_arg.id = sp->so_id;
 648         data->o_arg.clientid = sp->so_client->cl_clientid;
 649         if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
 650                 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
 651         data->timestamp = jiffies;
 652         rpc_call_setup(task, &msg, 0);
 653 }
 654
 655 static void nfs4_open_done(struct rpc_task *task, void *calldata)
 656 {
 657         struct nfs4_opendata *data = calldata;
 658
 659         data->rpc_status = task->tk_status;
 660         if (RPC_ASSASSINATED(task))
 661                 return;
 662         if (task->tk_status == 0) {
 663                 switch (data->o_res.f_attr->mode & S_IFMT) {
 664                         case S_IFREG:
 665                                 break;
 666                         case S_IFLNK:
 667                                 data->rpc_status = -ELOOP;
 668                                 break;
 669                         case S_IFDIR:
 670                                 data->rpc_status = -EISDIR;
 671                                 break;
 672                         default:
 673                                 data->rpc_status = -ENOTDIR;
 674                 }
 675                 renew_lease(data->o_res.server, data->timestamp);
 676         }
 677         nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
 678 }
 679
 680 static void nfs4_open_release(void *calldata)
 681 {
 682         struct nfs4_opendata *data = calldata;
 683         struct nfs4_state *state = NULL;
 684
 685         /* If this request hasn't been cancelled, do nothing */
 686         if (data->cancelled == 0)
 687                 goto out_free;
 688         /* In case of error, no cleanup! */
 689         if (data->rpc_status != 0)
 690                 goto out_free;
 691         /* In case we need an open_confirm, no cleanup! */
 692         if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
 693                 goto out_free;
 694         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 695         state = nfs4_opendata_to_nfs4_state(data);
 696         if (state != NULL)
 697                 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
 698 out_free:
 699         nfs4_opendata_free(data);
 700 }
 701
 702 static const struct rpc_call_ops nfs4_open_ops = {
 703         .rpc_call_prepare = nfs4_open_prepare,
 704         .rpc_call_done = nfs4_open_done,
 705         .rpc_release = nfs4_open_release,
 706 };
 707
 708 /*
 709  * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
 710  */
 711 static int _nfs4_proc_open(struct nfs4_opendata *data)
 712 {
 713         struct inode *dir = data->dir->d_inode;
 714         struct nfs_server *server = NFS_SERVER(dir);
 715         struct nfs_openargs *o_arg = &data->o_arg;
 716         struct nfs_openres *o_res = &data->o_res;
 717         struct rpc_task *task;
 718         int status;
 719
 720         atomic_inc(&data->count);
 721         /*
 722          * If rpc_run_task() ends up calling ->rpc_release(), we
 723          * want to ensure that it takes the 'error' code path.
 724          */
 725         data->rpc_status = -ENOMEM;
 726         task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
 727         if (IS_ERR(task))
 728                 return PTR_ERR(task);
 729         status = nfs4_wait_for_completion_rpc_task(task);
 730         if (status != 0) {
 731                 data->cancelled = 1;
 732                 smp_wmb();
 733         } else
 734                 status = data->rpc_status;
 735         rpc_put_task(task);
 736         if (status != 0)
 737                 return status;
 738
 739         if (o_arg->open_flags & O_CREAT) {
 740                 update_changeattr(dir, &o_res->cinfo);
 741                 nfs_post_op_update_inode(dir, o_res->dir_attr);
 742         } else
 743                 nfs_refresh_inode(dir, o_res->dir_attr);
 744         if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
 745                 status = _nfs4_proc_open_confirm(data);
 746                 if (status != 0)
 747                         return status;
 748         }
 749         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 750         if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
 751                 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
 752         return 0;
 753 }
 754
 755 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
 756 {
 757         struct nfs_access_entry cache;
 758         int mask = 0;
 759         int status;
 760
 761         if (openflags & FMODE_READ)
 762                 mask |= MAY_READ;
 763         if (openflags & FMODE_WRITE)
 764                 mask |= MAY_WRITE;
 765         status = nfs_access_get_cached(inode, cred, &cache);
 766         if (status == 0)
 767                 goto out;
 768
 769         /* Be clever: ask server to check for all possible rights */
 770         cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
 771         cache.cred = cred;
 772         cache.jiffies = jiffies;
 773         status = _nfs4_proc_access(inode, &cache);
 774         if (status != 0)
 775                 return status;
 776         nfs_access_add_cache(inode, &cache);
 777 out:
 778         if ((cache.mask & mask) == mask)
 779                 return 0;
 780         return -EACCES;
 781 }
 782
 783 static int nfs4_recover_expired_lease(struct nfs_server *server)
 784 {
 785         struct nfs_client *clp = server->nfs_client;
 786         int ret;
 787
 788         for (;;) {
 789                 ret = nfs4_wait_clnt_recover(server->client, clp);
 790                 if (ret != 0)
 791                         return ret;
 792                 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
 793                         break;
 794                 nfs4_schedule_state_recovery(clp);
 795         }
 796         return 0;
 797 }
 798
 799 /*
 800  * OPEN_EXPIRED:
 801  *      reclaim state on the server after a network partition.
 802  *      Assumes caller holds the appropriate lock
 803  */
 804 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
 805 {
 806         struct inode *inode = state->inode;
 807         struct nfs_delegation *delegation = NFS_I(inode)->delegation;
 808         struct nfs4_opendata *opendata;
 809         int openflags = state->state & (FMODE_READ|FMODE_WRITE);
 810         int ret;
 811
 812         if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
 813                 ret = _nfs4_do_access(inode, ctx->cred, openflags);
 814                 if (ret < 0)
 815                         return ret;
 816                 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
 817                 set_bit(NFS_DELEGATED_STATE, &state->flags);
 818                 return 0;
 819         }
 820         opendata = nfs4_opendata_alloc(&ctx->path, state->owner, openflags, NULL);
 821         if (opendata == NULL)
 822                 return -ENOMEM;
 823         ret = nfs4_open_recover(opendata, state);
 824         if (ret == -ESTALE) {
 825                 /* Invalidate the state owner so we don't ever use it again */
 826                 nfs4_drop_state_owner(state->owner);
 827                 d_drop(ctx->path.dentry);
 828         }
 829         nfs4_opendata_free(opendata);
 830         return ret;
 831 }
 832
 833 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
 834 {
 835         struct nfs_server *server = NFS_SERVER(state->inode);
 836         struct nfs4_exception exception = { };
 837         int err;
 838
 839         do {
 840                 err = _nfs4_open_expired(ctx, state);
 841                 if (err == -NFS4ERR_DELAY)
 842                         nfs4_handle_exception(server, err, &exception);
 843         } while (exception.retry);
 844         return err;
 845 }
 846
 847 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
 848 {
 849         struct nfs_open_context *ctx;
 850         int ret;
 851
 852         ctx = nfs4_state_find_open_context(state);
 853         if (IS_ERR(ctx))
 854                 return PTR_ERR(ctx);
 855         ret = nfs4_do_open_expired(ctx, state);
 856         put_nfs_open_context(ctx);
 857         return ret;
 858 }
 859
 860 /*
 861  * Returns a referenced nfs4_state if there is an open delegation on the file
 862  */
 863 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
 864 {
 865         struct nfs_delegation *delegation;
 866         struct nfs_server *server = NFS_SERVER(inode);
 867         struct nfs_client *clp = server->nfs_client;
 868         struct nfs_inode *nfsi = NFS_I(inode);
 869         struct nfs4_state_owner *sp = NULL;
 870         struct nfs4_state *state = NULL;
 871         int open_flags = flags & (FMODE_READ|FMODE_WRITE);
 872         int err;
 873
 874         err = -ENOMEM;
 875         if (!(sp = nfs4_get_state_owner(server, cred))) {
 876                 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
 877                 return err;
 878         }
 879         err = nfs4_recover_expired_lease(server);
 880         if (err != 0)
 881                 goto out_put_state_owner;
 882         /* Protect against reboot recovery - NOTE ORDER! */
 883         down_read(&clp->cl_sem);
 884         /* Protect against delegation recall */
 885         down_read(&nfsi->rwsem);
 886         delegation = NFS_I(inode)->delegation;
 887         err = -ENOENT;
 888         if (delegation == NULL || (delegation->type & open_flags) != open_flags)
 889                 goto out_err;
 890         err = -ENOMEM;
 891         state = nfs4_get_open_state(inode, sp);
 892         if (state == NULL)
 893                 goto out_err;
 894
 895         err = -ENOENT;
 896         if ((state->state & open_flags) == open_flags) {
 897                 spin_lock(&inode->i_lock);
 898                 update_open_stateflags(state, open_flags);
 899                 spin_unlock(&inode->i_lock);
 900                 goto out_ok;
 901         } else if (state->state != 0)
 902                 goto out_put_open_state;
 903
 904         lock_kernel();
 905         err = _nfs4_do_access(inode, cred, open_flags);
 906         unlock_kernel();
 907         if (err != 0)
 908                 goto out_put_open_state;
 909         set_bit(NFS_DELEGATED_STATE, &state->flags);
 910         update_open_stateid(state, &delegation->stateid, open_flags);
 911 out_ok:
 912         nfs4_put_state_owner(sp);
 913         up_read(&nfsi->rwsem);
 914         up_read(&clp->cl_sem);
 915         *res = state;
 916         return 0;
 917 out_put_open_state:
 918         nfs4_put_open_state(state);
 919 out_err:
 920         up_read(&nfsi->rwsem);
 921         up_read(&clp->cl_sem);
 922         if (err != -EACCES)
 923                 nfs_inode_return_delegation(inode);
 924 out_put_state_owner:
 925         nfs4_put_state_owner(sp);
 926         return err;
 927 }
 928
 929 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
 930 {
 931         struct nfs4_exception exception = { };
 932         struct nfs4_state *res = ERR_PTR(-EIO);
 933         int err;
 934
 935         do {
 936                 err = _nfs4_open_delegated(inode, flags, cred, &res);
 937                 if (err == 0)
 938                         break;
 939                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
 940                                         err, &exception));
 941         } while (exception.retry);
 942         return res;
 943 }
 944
 945 /*
 946  * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
 947  * fields corresponding to attributes that were used to store the verifier.
 948  * Make sure we clobber those fields in the later setattr call
 949  */
 950 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
 951 {
 952         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
 953             !(sattr->ia_valid & ATTR_ATIME_SET))
 954                 sattr->ia_valid |= ATTR_ATIME;
 955
 956         if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
 957             !(sattr->ia_valid & ATTR_MTIME_SET))
 958                 sattr->ia_valid |= ATTR_MTIME;
 959 }
 960
 961 /*
 962  * Returns a referenced nfs4_state
 963  */
 964 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
 965 {
 966         struct nfs4_state_owner  *sp;
 967         struct nfs4_state     *state = NULL;
 968         struct nfs_server       *server = NFS_SERVER(dir);
 969         struct nfs_client *clp = server->nfs_client;
 970         struct nfs4_opendata *opendata;
 971         int                     status;
 972
 973         /* Protect against reboot recovery conflicts */
 974         status = -ENOMEM;
 975         if (!(sp = nfs4_get_state_owner(server, cred))) {
 976                 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
 977                 goto out_err;
 978         }
 979         status = nfs4_recover_expired_lease(server);
 980         if (status != 0)
 981                 goto err_put_state_owner;
 982         down_read(&clp->cl_sem);
 983         status = -ENOMEM;
 984         opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
 985         if (opendata == NULL)
 986                 goto err_release_rwsem;
 987
 988         status = _nfs4_proc_open(opendata);
 989         if (status != 0)
 990                 goto err_opendata_free;
 991
 992         if (opendata->o_arg.open_flags & O_EXCL)
 993                 nfs4_exclusive_attrset(opendata, sattr);
 994
 995         status = -ENOMEM;
 996         state = nfs4_opendata_to_nfs4_state(opendata);
 997         if (state == NULL)
 998                 goto err_opendata_free;
 999         if (opendata->o_res.delegation_type != 0)
1000                 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
1001         nfs4_opendata_free(opendata);
1002         nfs4_put_state_owner(sp);
1003         up_read(&clp->cl_sem);
1004         *res = state;
1005         return 0;
1006 err_opendata_free:
1007         nfs4_opendata_free(opendata);
1008 err_release_rwsem:
1009         up_read(&clp->cl_sem);
1010 err_put_state_owner:
1011         nfs4_put_state_owner(sp);
1012 out_err:
1013         *res = NULL;
1014         return status;
1015 }
1016
1017
1018 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1019 {
1020         struct nfs4_exception exception = { };
1021         struct nfs4_state *res;
1022         int status;
1023
1024         do {
1025                 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1026                 if (status == 0)
1027                         break;
1028                 /* NOTE: BAD_SEQID means the server and client disagree about the
1029                  * book-keeping w.r.t. state-changing operations
1030                  * (OPEN/CLOSE/LOCK/LOCKU...)
1031                  * It is actually a sign of a bug on the client or on the server.
1032                  *
1033                  * If we receive a BAD_SEQID error in the particular case of
1034                  * doing an OPEN, we assume that nfs_increment_open_seqid() will
1035                  * have unhashed the old state_owner for us, and that we can
1036                  * therefore safely retry using a new one. We should still warn
1037                  * the user though...
1038                  */
1039                 if (status == -NFS4ERR_BAD_SEQID) {
1040                         printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1041                         exception.retry = 1;
1042                         continue;
1043                 }
1044                 /*
1045                  * BAD_STATEID on OPEN means that the server cancelled our
1046                  * state before it received the OPEN_CONFIRM.
1047                  * Recover by retrying the request as per the discussion
1048                  * on Page 181 of RFC3530.
1049                  */
1050                 if (status == -NFS4ERR_BAD_STATEID) {
1051                         exception.retry = 1;
1052                         continue;
1053                 }
1054                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1055                                         status, &exception));
1056         } while (exception.retry);
1057         return res;
1058 }
1059
1060 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1061                 struct iattr *sattr, struct nfs4_state *state)
1062 {
1063         struct nfs_server *server = NFS_SERVER(inode);
1064         struct nfs_setattrargs  arg = {
1065                 .fh             = NFS_FH(inode),
1066                 .iap            = sattr,
1067                 .server         = server,
1068                 .bitmask = server->attr_bitmask,
1069         };
1070         struct nfs_setattrres  res = {
1071                 .fattr          = fattr,
1072                 .server         = server,
1073         };
1074         struct rpc_message msg = {
1075                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1076                 .rpc_argp       = &arg,
1077                 .rpc_resp       = &res,
1078         };
1079         unsigned long timestamp = jiffies;
1080         int status;
1081
1082         nfs_fattr_init(fattr);
1083
1084         if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1085                 /* Use that stateid */
1086         } else if (state != NULL) {
1087                 msg.rpc_cred = state->owner->so_cred;
1088                 nfs4_copy_stateid(&arg.stateid, state, current->files);
1089         } else
1090                 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1091
1092         status = rpc_call_sync(server->client, &msg, 0);
1093         if (status == 0 && state != NULL)
1094                 renew_lease(server, timestamp);
1095         return status;
1096 }
1097
1098 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1099                 struct iattr *sattr, struct nfs4_state *state)
1100 {
1101         struct nfs_server *server = NFS_SERVER(inode);
1102         struct nfs4_exception exception = { };
1103         int err;
1104         do {
1105                 err = nfs4_handle_exception(server,
1106                                 _nfs4_do_setattr(inode, fattr, sattr, state),
1107                                 &exception);
1108         } while (exception.retry);
1109         return err;
1110 }
1111
1112 struct nfs4_closedata {
1113         struct path path;
1114         struct inode *inode;
1115         struct nfs4_state *state;
1116         struct nfs_closeargs arg;
1117         struct nfs_closeres res;
1118         struct nfs_fattr fattr;
1119         unsigned long timestamp;
1120 };
1121
1122 static void nfs4_free_closedata(void *data)
1123 {
1124         struct nfs4_closedata *calldata = data;
1125         struct nfs4_state_owner *sp = calldata->state->owner;
1126
1127         nfs4_put_open_state(calldata->state);
1128         nfs_free_seqid(calldata->arg.seqid);
1129         nfs4_put_state_owner(sp);
1130         dput(calldata->path.dentry);
1131         mntput(calldata->path.mnt);
1132         kfree(calldata);
1133 }
1134
1135 static void nfs4_close_done(struct rpc_task *task, void *data)
1136 {
1137         struct nfs4_closedata *calldata = data;
1138         struct nfs4_state *state = calldata->state;
1139         struct nfs_server *server = NFS_SERVER(calldata->inode);
1140
1141         if (RPC_ASSASSINATED(task))
1142                 return;
1143         /* hmm. we are done with the inode, and in the process of freeing
1144          * the state_owner. we keep this around to process errors
1145          */
1146         nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1147         switch (task->tk_status) {
1148                 case 0:
1149                         memcpy(&state->stateid, &calldata->res.stateid,
1150                                         sizeof(state->stateid));
1151                         renew_lease(server, calldata->timestamp);
1152                         break;
1153                 case -NFS4ERR_STALE_STATEID:
1154                 case -NFS4ERR_EXPIRED:
1155                         break;
1156                 default:
1157                         if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1158                                 rpc_restart_call(task);
1159                                 return;
1160                         }
1161         }
1162         nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1163 }
1164
1165 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1166 {
1167         struct nfs4_closedata *calldata = data;
1168         struct nfs4_state *state = calldata->state;
1169         struct rpc_message msg = {
1170                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1171                 .rpc_argp = &calldata->arg,
1172                 .rpc_resp = &calldata->res,
1173                 .rpc_cred = state->owner->so_cred,
1174         };
1175         int mode = 0, old_mode;
1176
1177         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1178                 return;
1179         /* Recalculate the new open mode in case someone reopened the file
1180          * while we were waiting in line to be scheduled.
1181          */
1182         spin_lock(&state->owner->so_lock);
1183         spin_lock(&calldata->inode->i_lock);
1184         mode = old_mode = state->state;
1185         if (state->n_rdwr == 0) {
1186                 if (state->n_rdonly == 0)
1187                         mode &= ~FMODE_READ;
1188                 if (state->n_wronly == 0)
1189                         mode &= ~FMODE_WRITE;
1190         }
1191         nfs4_state_set_mode_locked(state, mode);
1192         spin_unlock(&calldata->inode->i_lock);
1193         spin_unlock(&state->owner->so_lock);
1194         if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1195                 /* Note: exit _without_ calling nfs4_close_done */
1196                 task->tk_action = NULL;
1197                 return;
1198         }
1199         nfs_fattr_init(calldata->res.fattr);
1200         if (mode != 0)
1201                 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1202         calldata->arg.open_flags = mode;
1203         calldata->timestamp = jiffies;
1204         rpc_call_setup(task, &msg, 0);
1205 }
1206
1207 static const struct rpc_call_ops nfs4_close_ops = {
1208         .rpc_call_prepare = nfs4_close_prepare,
1209         .rpc_call_done = nfs4_close_done,
1210         .rpc_release = nfs4_free_closedata,
1211 };
1212
1213 /*
1214  * It is possible for data to be read/written from a mem-mapped file
1215  * after the sys_close call (which hits the vfs layer as a flush).
1216  * This means that we can't safely call nfsv4 close on a file until
1217  * the inode is cleared. This in turn means that we are not good
1218  * NFSv4 citizens - we do not indicate to the server to update the file's
1219  * share state even when we are done with one of the three share
1220  * stateid's in the inode.
1221  *
1222  * NOTE: Caller must be holding the sp->so_owner semaphore!
1223  */
1224 int nfs4_do_close(struct path *path, struct nfs4_state *state)
1225 {
1226         struct nfs_server *server = NFS_SERVER(state->inode);
1227         struct nfs4_closedata *calldata;
1228         struct nfs4_state_owner *sp = state->owner;
1229         struct rpc_task *task;
1230         int status = -ENOMEM;
1231
1232         calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1233         if (calldata == NULL)
1234                 goto out;
1235         calldata->inode = state->inode;
1236         calldata->state = state;
1237         calldata->arg.fh = NFS_FH(state->inode);
1238         calldata->arg.stateid = &state->stateid;
1239         /* Serialization for the sequence id */
1240         calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1241         if (calldata->arg.seqid == NULL)
1242                 goto out_free_calldata;
1243         calldata->arg.bitmask = server->attr_bitmask;
1244         calldata->res.fattr = &calldata->fattr;
1245         calldata->res.server = server;
1246         calldata->path.mnt = mntget(path->mnt);
1247         calldata->path.dentry = dget(path->dentry);
1248
1249         task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1250         if (IS_ERR(task))
1251                 return PTR_ERR(task);
1252         rpc_put_task(task);
1253         return 0;
1254 out_free_calldata:
1255         kfree(calldata);
1256 out:
1257         nfs4_put_open_state(state);
1258         nfs4_put_state_owner(sp);
1259         return status;
1260 }
1261
1262 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1263 {
1264         struct file *filp;
1265
1266         filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1267         if (!IS_ERR(filp)) {
1268                 struct nfs_open_context *ctx;
1269                 ctx = (struct nfs_open_context *)filp->private_data;
1270                 ctx->state = state;
1271                 return 0;
1272         }
1273         nfs4_close_state(path, state, nd->intent.open.flags);
1274         return PTR_ERR(filp);
1275 }
1276
1277 struct dentry *
1278 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1279 {
1280         struct path path = {
1281                 .mnt = nd->mnt,
1282                 .dentry = dentry,
1283         };
1284         struct iattr attr;
1285         struct rpc_cred *cred;
1286         struct nfs4_state *state;
1287         struct dentry *res;
1288
1289         if (nd->flags & LOOKUP_CREATE) {
1290                 attr.ia_mode = nd->intent.open.create_mode;
1291                 attr.ia_valid = ATTR_MODE;
1292                 if (!IS_POSIXACL(dir))
1293                         attr.ia_mode &= ~current->fs->umask;
1294         } else {
1295                 attr.ia_valid = 0;
1296                 BUG_ON(nd->intent.open.flags & O_CREAT);
1297         }
1298
1299         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1300         if (IS_ERR(cred))
1301                 return (struct dentry *)cred;
1302         state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1303         put_rpccred(cred);
1304         if (IS_ERR(state)) {
1305                 if (PTR_ERR(state) == -ENOENT)
1306                         d_add(dentry, NULL);
1307                 return (struct dentry *)state;
1308         }
1309         res = d_add_unique(dentry, igrab(state->inode));
1310         if (res != NULL)
1311                 dentry = res;
1312         nfs4_intent_set_file(nd, &path, state);
1313         return res;
1314 }
1315
1316 int
1317 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1318 {
1319         struct path path = {
1320                 .mnt = nd->mnt,
1321                 .dentry = dentry,
1322         };
1323         struct rpc_cred *cred;
1324         struct nfs4_state *state;
1325
1326         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1327         if (IS_ERR(cred))
1328                 return PTR_ERR(cred);
1329         state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1330         if (IS_ERR(state))
1331                 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1332         put_rpccred(cred);
1333         if (IS_ERR(state)) {
1334                 switch (PTR_ERR(state)) {
1335                         case -EPERM:
1336                         case -EACCES:
1337                         case -EDQUOT:
1338                         case -ENOSPC:
1339                         case -EROFS:
1340                                 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1341                                 return 1;
1342                         default:
1343                                 goto out_drop;
1344                 }
1345         }
1346         if (state->inode == dentry->d_inode) {
1347                 nfs4_intent_set_file(nd, &path, state);
1348                 return 1;
1349         }
1350         nfs4_close_state(&path, state, openflags);
1351 out_drop:
1352         d_drop(dentry);
1353         return 0;
1354 }
1355
1356
1357 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1358 {
1359         struct nfs4_server_caps_res res = {};
1360         struct rpc_message msg = {
1361                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1362                 .rpc_argp = fhandle,
1363                 .rpc_resp = &res,
1364         };
1365         int status;
1366
1367         status = rpc_call_sync(server->client, &msg, 0);
1368         if (status == 0) {
1369                 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1370                 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1371                         server->caps |= NFS_CAP_ACLS;
1372                 if (res.has_links != 0)
1373                         server->caps |= NFS_CAP_HARDLINKS;
1374                 if (res.has_symlinks != 0)
1375                         server->caps |= NFS_CAP_SYMLINKS;
1376                 server->acl_bitmask = res.acl_bitmask;
1377         }
1378         return status;
1379 }
1380
1381 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1382 {
1383         struct nfs4_exception exception = { };
1384         int err;
1385         do {
1386                 err = nfs4_handle_exception(server,
1387                                 _nfs4_server_capabilities(server, fhandle),
1388                                 &exception);
1389         } while (exception.retry);
1390         return err;
1391 }
1392
1393 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1394                 struct nfs_fsinfo *info)
1395 {
1396         struct nfs4_lookup_root_arg args = {
1397                 .bitmask = nfs4_fattr_bitmap,
1398         };
1399         struct nfs4_lookup_res res = {
1400                 .server = server,
1401                 .fattr = info->fattr,
1402                 .fh = fhandle,
1403         };
1404         struct rpc_message msg = {
1405                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1406                 .rpc_argp = &args,
1407                 .rpc_resp = &res,
1408         };
1409         nfs_fattr_init(info->fattr);
1410         return rpc_call_sync(server->client, &msg, 0);
1411 }
1412
1413 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1414                 struct nfs_fsinfo *info)
1415 {
1416         struct nfs4_exception exception = { };
1417         int err;
1418         do {
1419                 err = nfs4_handle_exception(server,
1420                                 _nfs4_lookup_root(server, fhandle, info),
1421                                 &exception);
1422         } while (exception.retry);
1423         return err;
1424 }
1425
1426 /*
1427  * get the file handle for the "/" directory on the server
1428  */
1429 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1430                               struct nfs_fsinfo *info)
1431 {
1432         int status;
1433
1434         status = nfs4_lookup_root(server, fhandle, info);
1435         if (status == 0)
1436                 status = nfs4_server_capabilities(server, fhandle);
1437         if (status == 0)
1438                 status = nfs4_do_fsinfo(server, fhandle, info);
1439         return nfs4_map_errors(status);
1440 }
1441
1442 /*
1443  * Get locations and (maybe) other attributes of a referral.
1444  * Note that we'll actually follow the referral later when
1445  * we detect fsid mismatch in inode revalidation
1446  */
1447 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1448 {
1449         int status = -ENOMEM;
1450         struct page *page = NULL;
1451         struct nfs4_fs_locations *locations = NULL;
1452
1453         page = alloc_page(GFP_KERNEL);
1454         if (page == NULL)
1455                 goto out;
1456         locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1457         if (locations == NULL)
1458                 goto out;
1459
1460         status = nfs4_proc_fs_locations(dir, name, locations, page);
1461         if (status != 0)
1462                 goto out;
1463         /* Make sure server returned a different fsid for the referral */
1464         if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1465                 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1466                 status = -EIO;
1467                 goto out;
1468         }
1469
1470         memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1471         fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1472         if (!fattr->mode)
1473                 fattr->mode = S_IFDIR;
1474         memset(fhandle, 0, sizeof(struct nfs_fh));
1475 out:
1476         if (page)
1477                 __free_page(page);
1478         if (locations)
1479                 kfree(locations);
1480         return status;
1481 }
1482
1483 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1484 {
1485         struct nfs4_getattr_arg args = {
1486                 .fh = fhandle,
1487                 .bitmask = server->attr_bitmask,
1488         };
1489         struct nfs4_getattr_res res = {
1490                 .fattr = fattr,
1491                 .server = server,
1492         };
1493         struct rpc_message msg = {
1494                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1495                 .rpc_argp = &args,
1496                 .rpc_resp = &res,
1497         };
1498
1499         nfs_fattr_init(fattr);
1500         return rpc_call_sync(server->client, &msg, 0);
1501 }
1502
1503 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1504 {
1505         struct nfs4_exception exception = { };
1506         int err;
1507         do {
1508                 err = nfs4_handle_exception(server,
1509                                 _nfs4_proc_getattr(server, fhandle, fattr),
1510                                 &exception);
1511         } while (exception.retry);
1512         return err;
1513 }
1514
1515 /*
1516  * The file is not closed if it is opened due to the a request to change
1517  * the size of the file. The open call will not be needed once the
1518  * VFS layer lookup-intents are implemented.
1519  *
1520  * Close is called when the inode is destroyed.
1521  * If we haven't opened the file for O_WRONLY, we
1522  * need to in the size_change case to obtain a stateid.
1523  *
1524  * Got race?
1525  * Because OPEN is always done by name in nfsv4, it is
1526  * possible that we opened a different file by the same
1527  * name.  We can recognize this race condition, but we
1528  * can't do anything about it besides returning an error.
1529  *
1530  * This will be fixed with VFS changes (lookup-intent).
1531  */
1532 static int
1533 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1534                   struct iattr *sattr)
1535 {
1536         struct rpc_cred *cred;
1537         struct inode *inode = dentry->d_inode;
1538         struct nfs_open_context *ctx;
1539         struct nfs4_state *state = NULL;
1540         int status;
1541
1542         nfs_fattr_init(fattr);
1543
1544         cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1545         if (IS_ERR(cred))
1546                 return PTR_ERR(cred);
1547
1548         /* Search for an existing open(O_WRITE) file */
1549         ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1550         if (ctx != NULL)
1551                 state = ctx->state;
1552
1553         status = nfs4_do_setattr(inode, fattr, sattr, state);
1554         if (status == 0)
1555                 nfs_setattr_update_inode(inode, sattr);
1556         if (ctx != NULL)
1557                 put_nfs_open_context(ctx);
1558         put_rpccred(cred);
1559         return status;
1560 }
1561
1562 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1563                 struct qstr *name, struct nfs_fh *fhandle,
1564                 struct nfs_fattr *fattr)
1565 {
1566         int                    status;
1567         struct nfs4_lookup_arg args = {
1568                 .bitmask = server->attr_bitmask,
1569                 .dir_fh = dirfh,
1570                 .name = name,
1571         };
1572         struct nfs4_lookup_res res = {
1573                 .server = server,
1574                 .fattr = fattr,
1575                 .fh = fhandle,
1576         };
1577         struct rpc_message msg = {
1578                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1579                 .rpc_argp = &args,
1580                 .rpc_resp = &res,
1581         };
1582
1583         nfs_fattr_init(fattr);
1584
1585         dprintk("NFS call  lookupfh %s\n", name->name);
1586         status = rpc_call_sync(server->client, &msg, 0);
1587         dprintk("NFS reply lookupfh: %d\n", status);
1588         if (status == -NFS4ERR_MOVED)
1589                 status = -EREMOTE;
1590         return status;
1591 }
1592
1593 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1594                               struct qstr *name, struct nfs_fh *fhandle,
1595                               struct nfs_fattr *fattr)
1596 {
1597         struct nfs4_exception exception = { };
1598         int err;
1599         do {
1600                 err = nfs4_handle_exception(server,
1601                                 _nfs4_proc_lookupfh(server, dirfh, name,
1602                                                     fhandle, fattr),
1603                                 &exception);
1604         } while (exception.retry);
1605         return err;
1606 }
1607
1608 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1609                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1610 {
1611         int                    status;
1612         struct nfs_server *server = NFS_SERVER(dir);
1613         struct nfs4_lookup_arg args = {
1614                 .bitmask = server->attr_bitmask,
1615                 .dir_fh = NFS_FH(dir),
1616                 .name = name,
1617         };
1618         struct nfs4_lookup_res res = {
1619                 .server = server,
1620                 .fattr = fattr,
1621                 .fh = fhandle,
1622         };
1623         struct rpc_message msg = {
1624                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1625                 .rpc_argp = &args,
1626                 .rpc_resp = &res,
1627         };
1628
1629         nfs_fattr_init(fattr);
1630
1631         dprintk("NFS call  lookup %s\n", name->name);
1632         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1633         if (status == -NFS4ERR_MOVED)
1634                 status = nfs4_get_referral(dir, name, fattr, fhandle);
1635         dprintk("NFS reply lookup: %d\n", status);
1636         return status;
1637 }
1638
1639 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1640 {
1641         struct nfs4_exception exception = { };
1642         int err;
1643         do {
1644                 err = nfs4_handle_exception(NFS_SERVER(dir),
1645                                 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1646                                 &exception);
1647         } while (exception.retry);
1648         return err;
1649 }
1650
1651 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1652 {
1653         struct nfs4_accessargs args = {
1654                 .fh = NFS_FH(inode),
1655         };
1656         struct nfs4_accessres res = { 0 };
1657         struct rpc_message msg = {
1658                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1659                 .rpc_argp = &args,
1660                 .rpc_resp = &res,
1661                 .rpc_cred = entry->cred,
1662         };
1663         int mode = entry->mask;
1664         int status;
1665
1666         /*
1667          * Determine which access bits we want to ask for...
1668          */
1669         if (mode & MAY_READ)
1670                 args.access |= NFS4_ACCESS_READ;
1671         if (S_ISDIR(inode->i_mode)) {
1672                 if (mode & MAY_WRITE)
1673                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1674                 if (mode & MAY_EXEC)
1675                         args.access |= NFS4_ACCESS_LOOKUP;
1676         } else {
1677                 if (mode & MAY_WRITE)
1678                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1679                 if (mode & MAY_EXEC)
1680                         args.access |= NFS4_ACCESS_EXECUTE;
1681         }
1682         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1683         if (!status) {
1684                 entry->mask = 0;
1685                 if (res.access & NFS4_ACCESS_READ)
1686                         entry->mask |= MAY_READ;
1687                 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1688                         entry->mask |= MAY_WRITE;
1689                 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1690                         entry->mask |= MAY_EXEC;
1691         }
1692         return status;
1693 }
1694
1695 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1696 {
1697         struct nfs4_exception exception = { };
1698         int err;
1699         do {
1700                 err = nfs4_handle_exception(NFS_SERVER(inode),
1701                                 _nfs4_proc_access(inode, entry),
1702                                 &exception);
1703         } while (exception.retry);
1704         return err;
1705 }
1706
1707 /*
1708  * TODO: For the time being, we don't try to get any attributes
1709  * along with any of the zero-copy operations READ, READDIR,
1710  * READLINK, WRITE.
1711  *
1712  * In the case of the first three, we want to put the GETATTR
1713  * after the read-type operation -- this is because it is hard
1714  * to predict the length of a GETATTR response in v4, and thus
1715  * align the READ data correctly.  This means that the GETATTR
1716  * may end up partially falling into the page cache, and we should
1717  * shift it into the 'tail' of the xdr_buf before processing.
1718  * To do this efficiently, we need to know the total length
1719  * of data received, which doesn't seem to be available outside
1720  * of the RPC layer.
1721  *
1722  * In the case of WRITE, we also want to put the GETATTR after
1723  * the operation -- in this case because we want to make sure
1724  * we get the post-operation mtime and size.  This means that
1725  * we can't use xdr_encode_pages() as written: we need a variant
1726  * of it which would leave room in the 'tail' iovec.
1727  *
1728  * Both of these changes to the XDR layer would in fact be quite
1729  * minor, but I decided to leave them for a subsequent patch.
1730  */
1731 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1732                 unsigned int pgbase, unsigned int pglen)
1733 {
1734         struct nfs4_readlink args = {
1735                 .fh       = NFS_FH(inode),
1736                 .pgbase   = pgbase,
1737                 .pglen    = pglen,
1738                 .pages    = &page,
1739         };
1740         struct rpc_message msg = {
1741                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1742                 .rpc_argp = &args,
1743                 .rpc_resp = NULL,
1744         };
1745
1746         return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1747 }
1748
1749 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1750                 unsigned int pgbase, unsigned int pglen)
1751 {
1752         struct nfs4_exception exception = { };
1753         int err;
1754         do {
1755                 err = nfs4_handle_exception(NFS_SERVER(inode),
1756                                 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1757                                 &exception);
1758         } while (exception.retry);
1759         return err;
1760 }
1761
1762 /*
1763  * Got race?
1764  * We will need to arrange for the VFS layer to provide an atomic open.
1765  * Until then, this create/open method is prone to inefficiency and race
1766  * conditions due to the lookup, create, and open VFS calls from sys_open()
1767  * placed on the wire.
1768  *
1769  * Given the above sorry state of affairs, I'm simply sending an OPEN.
1770  * The file will be opened again in the subsequent VFS open call
1771  * (nfs4_proc_file_open).
1772  *
1773  * The open for read will just hang around to be used by any process that
1774  * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1775  */
1776
1777 static int
1778 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1779                  int flags, struct nameidata *nd)
1780 {
1781         struct path path = {
1782                 .mnt = nd->mnt,
1783                 .dentry = dentry,
1784         };
1785         struct nfs4_state *state;
1786         struct rpc_cred *cred;
1787         int status = 0;
1788
1789         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1790         if (IS_ERR(cred)) {
1791                 status = PTR_ERR(cred);
1792                 goto out;
1793         }
1794         state = nfs4_do_open(dir, &path, flags, sattr, cred);
1795         put_rpccred(cred);
1796         if (IS_ERR(state)) {
1797                 status = PTR_ERR(state);
1798                 goto out;
1799         }
1800         d_instantiate(dentry, igrab(state->inode));
1801         if (flags & O_EXCL) {
1802                 struct nfs_fattr fattr;
1803                 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1804                 if (status == 0)
1805                         nfs_setattr_update_inode(state->inode, sattr);
1806                 nfs_post_op_update_inode(state->inode, &fattr);
1807         }
1808         if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1809                 status = nfs4_intent_set_file(nd, &path, state);
1810         else
1811                 nfs4_close_state(&path, state, flags);
1812 out:
1813         return status;
1814 }
1815
1816 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1817 {
1818         struct nfs_server *server = NFS_SERVER(dir);
1819         struct nfs4_remove_arg args = {
1820                 .fh = NFS_FH(dir),
1821                 .name = name,
1822                 .bitmask = server->attr_bitmask,
1823         };
1824         struct nfs_fattr dir_attr;
1825         struct nfs4_remove_res  res = {
1826                 .server = server,
1827                 .dir_attr = &dir_attr,
1828         };
1829         struct rpc_message msg = {
1830                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1831                 .rpc_argp       = &args,
1832                 .rpc_resp       = &res,
1833         };
1834         int                     status;
1835
1836         nfs_fattr_init(res.dir_attr);
1837         status = rpc_call_sync(server->client, &msg, 0);
1838         if (status == 0) {
1839                 update_changeattr(dir, &res.cinfo);
1840                 nfs_post_op_update_inode(dir, res.dir_attr);
1841         }
1842         return status;
1843 }
1844
1845 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1846 {
1847         struct nfs4_exception exception = { };
1848         int err;
1849         do {
1850                 err = nfs4_handle_exception(NFS_SERVER(dir),
1851                                 _nfs4_proc_remove(dir, name),
1852                                 &exception);
1853         } while (exception.retry);
1854         return err;
1855 }
1856
1857 struct unlink_desc {
1858         struct nfs4_remove_arg  args;
1859         struct nfs4_remove_res  res;
1860         struct nfs_fattr dir_attr;
1861 };
1862
1863 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1864                 struct qstr *name)
1865 {
1866         struct nfs_server *server = NFS_SERVER(dir->d_inode);
1867         struct unlink_desc *up;
1868
1869         up = kmalloc(sizeof(*up), GFP_KERNEL);
1870         if (!up)
1871                 return -ENOMEM;
1872
1873         up->args.fh = NFS_FH(dir->d_inode);
1874         up->args.name = name;
1875         up->args.bitmask = server->attr_bitmask;
1876         up->res.server = server;
1877         up->res.dir_attr = &up->dir_attr;
1878
1879         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1880         msg->rpc_argp = &up->args;
1881         msg->rpc_resp = &up->res;
1882         return 0;
1883 }
1884
1885 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1886 {
1887         struct rpc_message *msg = &task->tk_msg;
1888         struct unlink_desc *up;
1889
1890         if (msg->rpc_resp != NULL) {
1891                 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1892                 update_changeattr(dir->d_inode, &up->res.cinfo);
1893                 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1894                 kfree(up);
1895                 msg->rpc_resp = NULL;
1896                 msg->rpc_argp = NULL;
1897         }
1898         return 0;
1899 }
1900
1901 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1902                 struct inode *new_dir, struct qstr *new_name)
1903 {
1904         struct nfs_server *server = NFS_SERVER(old_dir);
1905         struct nfs4_rename_arg arg = {
1906                 .old_dir = NFS_FH(old_dir),
1907                 .new_dir = NFS_FH(new_dir),
1908                 .old_name = old_name,
1909                 .new_name = new_name,
1910                 .bitmask = server->attr_bitmask,
1911         };
1912         struct nfs_fattr old_fattr, new_fattr;
1913         struct nfs4_rename_res res = {
1914                 .server = server,
1915                 .old_fattr = &old_fattr,
1916                 .new_fattr = &new_fattr,
1917         };
1918         struct rpc_message msg = {
1919                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1920                 .rpc_argp = &arg,
1921                 .rpc_resp = &res,
1922         };
1923         int                     status;
1924
1925         nfs_fattr_init(res.old_fattr);
1926         nfs_fattr_init(res.new_fattr);
1927         status = rpc_call_sync(server->client, &msg, 0);
1928
1929         if (!status) {
1930                 update_changeattr(old_dir, &res.old_cinfo);
1931                 nfs_post_op_update_inode(old_dir, res.old_fattr);
1932                 update_changeattr(new_dir, &res.new_cinfo);
1933                 nfs_post_op_update_inode(new_dir, res.new_fattr);
1934         }
1935         return status;
1936 }
1937
1938 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1939                 struct inode *new_dir, struct qstr *new_name)
1940 {
1941         struct nfs4_exception exception = { };
1942         int err;
1943         do {
1944                 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1945                                 _nfs4_proc_rename(old_dir, old_name,
1946                                         new_dir, new_name),
1947                                 &exception);
1948         } while (exception.retry);
1949         return err;
1950 }
1951
1952 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1953 {
1954         struct nfs_server *server = NFS_SERVER(inode);
1955         struct nfs4_link_arg arg = {
1956                 .fh     = NFS_FH(inode),
1957                 .dir_fh = NFS_FH(dir),
1958                 .name   = name,
1959                 .bitmask = server->attr_bitmask,
1960         };
1961         struct nfs_fattr fattr, dir_attr;
1962         struct nfs4_link_res res = {
1963                 .server = server,
1964                 .fattr = &fattr,
1965                 .dir_attr = &dir_attr,
1966         };
1967         struct rpc_message msg = {
1968                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1969                 .rpc_argp = &arg,
1970                 .rpc_resp = &res,
1971         };
1972         int                     status;
1973
1974         nfs_fattr_init(res.fattr);
1975         nfs_fattr_init(res.dir_attr);
1976         status = rpc_call_sync(server->client, &msg, 0);
1977         if (!status) {
1978                 update_changeattr(dir, &res.cinfo);
1979                 nfs_post_op_update_inode(dir, res.dir_attr);
1980                 nfs_post_op_update_inode(inode, res.fattr);
1981         }
1982
1983         return status;
1984 }
1985
1986 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1987 {
1988         struct nfs4_exception exception = { };
1989         int err;
1990         do {
1991                 err = nfs4_handle_exception(NFS_SERVER(inode),
1992                                 _nfs4_proc_link(inode, dir, name),
1993                                 &exception);
1994         } while (exception.retry);
1995         return err;
1996 }
1997
1998 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1999                 struct page *page, unsigned int len, struct iattr *sattr)
2000 {
2001         struct nfs_server *server = NFS_SERVER(dir);
2002         struct nfs_fh fhandle;
2003         struct nfs_fattr fattr, dir_fattr;
2004         struct nfs4_create_arg arg = {
2005                 .dir_fh = NFS_FH(dir),
2006                 .server = server,
2007                 .name = &dentry->d_name,
2008                 .attrs = sattr,
2009                 .ftype = NF4LNK,
2010                 .bitmask = server->attr_bitmask,
2011         };
2012         struct nfs4_create_res res = {
2013                 .server = server,
2014                 .fh = &fhandle,
2015                 .fattr = &fattr,
2016                 .dir_fattr = &dir_fattr,
2017         };
2018         struct rpc_message msg = {
2019                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2020                 .rpc_argp = &arg,
2021                 .rpc_resp = &res,
2022         };
2023         int                     status;
2024
2025         if (len > NFS4_MAXPATHLEN)
2026                 return -ENAMETOOLONG;
2027
2028         arg.u.symlink.pages = &page;
2029         arg.u.symlink.len = len;
2030         nfs_fattr_init(&fattr);
2031         nfs_fattr_init(&dir_fattr);
2032
2033         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2034         if (!status) {
2035                 update_changeattr(dir, &res.dir_cinfo);
2036                 nfs_post_op_update_inode(dir, res.dir_fattr);
2037                 status = nfs_instantiate(dentry, &fhandle, &fattr);
2038         }
2039         return status;
2040 }
2041
2042 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2043                 struct page *page, unsigned int len, struct iattr *sattr)
2044 {
2045         struct nfs4_exception exception = { };
2046         int err;
2047         do {
2048                 err = nfs4_handle_exception(NFS_SERVER(dir),
2049                                 _nfs4_proc_symlink(dir, dentry, page,
2050                                                         len, sattr),
2051                                 &exception);
2052         } while (exception.retry);
2053         return err;
2054 }
2055
2056 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2057                 struct iattr *sattr)
2058 {
2059         struct nfs_server *server = NFS_SERVER(dir);
2060         struct nfs_fh fhandle;
2061         struct nfs_fattr fattr, dir_fattr;
2062         struct nfs4_create_arg arg = {
2063                 .dir_fh = NFS_FH(dir),
2064                 .server = server,
2065                 .name = &dentry->d_name,
2066                 .attrs = sattr,
2067                 .ftype = NF4DIR,
2068                 .bitmask = server->attr_bitmask,
2069         };
2070         struct nfs4_create_res res = {
2071                 .server = server,
2072                 .fh = &fhandle,
2073                 .fattr = &fattr,
2074                 .dir_fattr = &dir_fattr,
2075         };
2076         struct rpc_message msg = {
2077                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2078                 .rpc_argp = &arg,
2079                 .rpc_resp = &res,
2080         };
2081         int                     status;
2082
2083         nfs_fattr_init(&fattr);
2084         nfs_fattr_init(&dir_fattr);
2085
2086         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2087         if (!status) {
2088                 update_changeattr(dir, &res.dir_cinfo);
2089                 nfs_post_op_update_inode(dir, res.dir_fattr);
2090                 status = nfs_instantiate(dentry, &fhandle, &fattr);
2091         }
2092         return status;
2093 }
2094
2095 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2096                 struct iattr *sattr)
2097 {
2098         struct nfs4_exception exception = { };
2099         int err;
2100         do {
2101                 err = nfs4_handle_exception(NFS_SERVER(dir),
2102                                 _nfs4_proc_mkdir(dir, dentry, sattr),
2103                                 &exception);
2104         } while (exception.retry);
2105         return err;
2106 }
2107
2108 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2109                   u64 cookie, struct page *page, unsigned int count, int plus)
2110 {
2111         struct inode            *dir = dentry->d_inode;
2112         struct nfs4_readdir_arg args = {
2113                 .fh = NFS_FH(dir),
2114                 .pages = &page,
2115                 .pgbase = 0,
2116                 .count = count,
2117                 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2118         };
2119         struct nfs4_readdir_res res;
2120         struct rpc_message msg = {
2121                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2122                 .rpc_argp = &args,
2123                 .rpc_resp = &res,
2124                 .rpc_cred = cred,
2125         };
2126         int                     status;
2127
2128         dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2129                         dentry->d_parent->d_name.name,
2130                         dentry->d_name.name,
2131                         (unsigned long long)cookie);
2132         nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2133         res.pgbase = args.pgbase;
2134         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2135         if (status == 0)
2136                 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2137         dprintk("%s: returns %d\n", __FUNCTION__, status);
2138         return status;
2139 }
2140
2141 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2142                   u64 cookie, struct page *page, unsigned int count, int plus)
2143 {
2144         struct nfs4_exception exception = { };
2145         int err;
2146         do {
2147                 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2148                                 _nfs4_proc_readdir(dentry, cred, cookie,
2149                                         page, count, plus),
2150                                 &exception);
2151         } while (exception.retry);
2152         return err;
2153 }
2154
2155 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2156                 struct iattr *sattr, dev_t rdev)
2157 {
2158         struct nfs_server *server = NFS_SERVER(dir);
2159         struct nfs_fh fh;
2160         struct nfs_fattr fattr, dir_fattr;
2161         struct nfs4_create_arg arg = {
2162                 .dir_fh = NFS_FH(dir),
2163                 .server = server,
2164                 .name = &dentry->d_name,
2165                 .attrs = sattr,
2166                 .bitmask = server->attr_bitmask,
2167         };
2168         struct nfs4_create_res res = {
2169                 .server = server,
2170                 .fh = &fh,
2171                 .fattr = &fattr,
2172                 .dir_fattr = &dir_fattr,
2173         };
2174         struct rpc_message msg = {
2175                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2176                 .rpc_argp = &arg,
2177                 .rpc_resp = &res,
2178         };
2179         int                     status;
2180         int                     mode = sattr->ia_mode;
2181
2182         nfs_fattr_init(&fattr);
2183         nfs_fattr_init(&dir_fattr);
2184
2185         BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2186         BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2187         if (S_ISFIFO(mode))
2188                 arg.ftype = NF4FIFO;
2189         else if (S_ISBLK(mode)) {
2190                 arg.ftype = NF4BLK;
2191                 arg.u.device.specdata1 = MAJOR(rdev);
2192                 arg.u.device.specdata2 = MINOR(rdev);
2193         }
2194         else if (S_ISCHR(mode)) {
2195                 arg.ftype = NF4CHR;
2196                 arg.u.device.specdata1 = MAJOR(rdev);
2197                 arg.u.device.specdata2 = MINOR(rdev);
2198         }
2199         else
2200                 arg.ftype = NF4SOCK;
2201
2202         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2203         if (status == 0) {
2204                 update_changeattr(dir, &res.dir_cinfo);
2205                 nfs_post_op_update_inode(dir, res.dir_fattr);
2206                 status = nfs_instantiate(dentry, &fh, &fattr);
2207         }
2208         return status;
2209 }
2210
2211 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2212                 struct iattr *sattr, dev_t rdev)
2213 {
2214         struct nfs4_exception exception = { };
2215         int err;
2216         do {
2217                 err = nfs4_handle_exception(NFS_SERVER(dir),
2218                                 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2219                                 &exception);
2220         } while (exception.retry);
2221         return err;
2222 }
2223
2224 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2225                  struct nfs_fsstat *fsstat)
2226 {
2227         struct nfs4_statfs_arg args = {
2228                 .fh = fhandle,
2229                 .bitmask = server->attr_bitmask,
2230         };
2231         struct rpc_message msg = {
2232                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2233                 .rpc_argp = &args,
2234                 .rpc_resp = fsstat,
2235         };
2236
2237         nfs_fattr_init(fsstat->fattr);
2238         return rpc_call_sync(server->client, &msg, 0);
2239 }
2240
2241 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2242 {
2243         struct nfs4_exception exception = { };
2244         int err;
2245         do {
2246                 err = nfs4_handle_exception(server,
2247                                 _nfs4_proc_statfs(server, fhandle, fsstat),
2248                                 &exception);
2249         } while (exception.retry);
2250         return err;
2251 }
2252
2253 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2254                 struct nfs_fsinfo *fsinfo)
2255 {
2256         struct nfs4_fsinfo_arg args = {
2257                 .fh = fhandle,
2258                 .bitmask = server->attr_bitmask,
2259         };
2260         struct rpc_message msg = {
2261                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2262                 .rpc_argp = &args,
2263                 .rpc_resp = fsinfo,
2264         };
2265
2266         return rpc_call_sync(server->client, &msg, 0);
2267 }
2268
2269 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2270 {
2271         struct nfs4_exception exception = { };
2272         int err;
2273
2274         do {
2275                 err = nfs4_handle_exception(server,
2276                                 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2277                                 &exception);
2278         } while (exception.retry);
2279         return err;
2280 }
2281
2282 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2283 {
2284         nfs_fattr_init(fsinfo->fattr);
2285         return nfs4_do_fsinfo(server, fhandle, fsinfo);
2286 }
2287
2288 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2289                 struct nfs_pathconf *pathconf)
2290 {
2291         struct nfs4_pathconf_arg args = {
2292                 .fh = fhandle,
2293                 .bitmask = server->attr_bitmask,
2294         };
2295         struct rpc_message msg = {
2296                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2297                 .rpc_argp = &args,
2298                 .rpc_resp = pathconf,
2299         };
2300
2301         /* None of the pathconf attributes are mandatory to implement */
2302         if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2303                 memset(pathconf, 0, sizeof(*pathconf));
2304                 return 0;
2305         }
2306
2307         nfs_fattr_init(pathconf->fattr);
2308         return rpc_call_sync(server->client, &msg, 0);
2309 }
2310
2311 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2312                 struct nfs_pathconf *pathconf)
2313 {
2314         struct nfs4_exception exception = { };
2315         int err;
2316
2317         do {
2318                 err = nfs4_handle_exception(server,
2319                                 _nfs4_proc_pathconf(server, fhandle, pathconf),
2320                                 &exception);
2321         } while (exception.retry);
2322         return err;
2323 }
2324
2325 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2326 {
2327         struct nfs_server *server = NFS_SERVER(data->inode);
2328
2329         if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2330                 rpc_restart_call(task);
2331                 return -EAGAIN;
2332         }
2333         if (task->tk_status > 0)
2334                 renew_lease(server, data->timestamp);
2335         return 0;
2336 }
2337
2338 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2339 {
2340         struct rpc_message msg = {
2341                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2342                 .rpc_argp = &data->args,
2343                 .rpc_resp = &data->res,
2344                 .rpc_cred = data->cred,
2345         };
2346
2347         data->timestamp   = jiffies;
2348
2349         rpc_call_setup(&data->task, &msg, 0);
2350 }
2351
2352 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2353 {
2354         struct inode *inode = data->inode;
2355
2356         if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2357                 rpc_restart_call(task);
2358                 return -EAGAIN;
2359         }
2360         if (task->tk_status >= 0) {
2361                 renew_lease(NFS_SERVER(inode), data->timestamp);
2362                 nfs_post_op_update_inode(inode, data->res.fattr);
2363         }
2364         return 0;
2365 }
2366
2367 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2368 {
2369         struct rpc_message msg = {
2370                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2371                 .rpc_argp = &data->args,
2372                 .rpc_resp = &data->res,
2373                 .rpc_cred = data->cred,
2374         };
2375         struct inode *inode = data->inode;
2376         struct nfs_server *server = NFS_SERVER(inode);
2377         int stable;
2378
2379         if (how & FLUSH_STABLE) {
2380                 if (!NFS_I(inode)->ncommit)
2381                         stable = NFS_FILE_SYNC;
2382                 else
2383                         stable = NFS_DATA_SYNC;
2384         } else
2385                 stable = NFS_UNSTABLE;
2386         data->args.stable = stable;
2387         data->args.bitmask = server->attr_bitmask;
2388         data->res.server = server;
2389
2390         data->timestamp   = jiffies;
2391
2392         /* Finalize the task. */
2393         rpc_call_setup(&data->task, &msg, 0);
2394 }
2395
2396 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2397 {
2398         struct inode *inode = data->inode;
2399
2400         if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2401                 rpc_restart_call(task);
2402                 return -EAGAIN;
2403         }
2404         if (task->tk_status >= 0)
2405                 nfs_post_op_update_inode(inode, data->res.fattr);
2406         return 0;
2407 }
2408
2409 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2410 {
2411         struct rpc_message msg = {
2412                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2413                 .rpc_argp = &data->args,
2414                 .rpc_resp = &data->res,
2415                 .rpc_cred = data->cred,
2416         };
2417         struct nfs_server *server = NFS_SERVER(data->inode);
2418
2419         data->args.bitmask = server->attr_bitmask;
2420         data->res.server = server;
2421
2422         rpc_call_setup(&data->task, &msg, 0);
2423 }
2424
2425 /*
2426  * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2427  * standalone procedure for queueing an asynchronous RENEW.
2428  */
2429 static void nfs4_renew_done(struct rpc_task *task, void *data)
2430 {
2431         struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2432         unsigned long timestamp = (unsigned long)data;
2433
2434         if (task->tk_status < 0) {
2435                 switch (task->tk_status) {
2436                         case -NFS4ERR_STALE_CLIENTID:
2437                         case -NFS4ERR_EXPIRED:
2438                         case -NFS4ERR_CB_PATH_DOWN:
2439                                 nfs4_schedule_state_recovery(clp);
2440                 }
2441                 return;
2442         }
2443         spin_lock(&clp->cl_lock);
2444         if (time_before(clp->cl_last_renewal,timestamp))
2445                 clp->cl_last_renewal = timestamp;
2446         spin_unlock(&clp->cl_lock);
2447 }
2448
2449 static const struct rpc_call_ops nfs4_renew_ops = {
2450         .rpc_call_done = nfs4_renew_done,
2451 };
2452
2453 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2454 {
2455         struct rpc_message msg = {
2456                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2457                 .rpc_argp       = clp,
2458                 .rpc_cred       = cred,
2459         };
2460
2461         return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2462                         &nfs4_renew_ops, (void *)jiffies);
2463 }
2464
2465 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2466 {
2467         struct rpc_message msg = {
2468                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2469                 .rpc_argp       = clp,
2470                 .rpc_cred       = cred,
2471         };
2472         unsigned long now = jiffies;
2473         int status;
2474
2475         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2476         if (status < 0)
2477                 return status;
2478         spin_lock(&clp->cl_lock);
2479         if (time_before(clp->cl_last_renewal,now))
2480                 clp->cl_last_renewal = now;
2481         spin_unlock(&clp->cl_lock);
2482         return 0;
2483 }
2484
2485 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2486 {
2487         return (server->caps & NFS_CAP_ACLS)
2488                 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2489                 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2490 }
2491
2492 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2493  * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2494  * the stack.
2495  */
2496 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2497
2498 static void buf_to_pages(const void *buf, size_t buflen,
2499                 struct page **pages, unsigned int *pgbase)
2500 {
2501         const void *p = buf;
2502
2503         *pgbase = offset_in_page(buf);
2504         p -= *pgbase;
2505         while (p < buf + buflen) {
2506                 *(pages++) = virt_to_page(p);
2507                 p += PAGE_CACHE_SIZE;
2508         }
2509 }
2510
2511 struct nfs4_cached_acl {
2512         int cached;
2513         size_t len;
2514         char data[0];
2515 };
2516
2517 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2518 {
2519         struct nfs_inode *nfsi = NFS_I(inode);
2520
2521         spin_lock(&inode->i_lock);
2522         kfree(nfsi->nfs4_acl);
2523         nfsi->nfs4_acl = acl;
2524         spin_unlock(&inode->i_lock);
2525 }
2526
2527 static void nfs4_zap_acl_attr(struct inode *inode)
2528 {
2529         nfs4_set_cached_acl(inode, NULL);
2530 }
2531
2532 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2533 {
2534         struct nfs_inode *nfsi = NFS_I(inode);
2535         struct nfs4_cached_acl *acl;
2536         int ret = -ENOENT;
2537
2538         spin_lock(&inode->i_lock);
2539         acl = nfsi->nfs4_acl;
2540         if (acl == NULL)
2541                 goto out;
2542         if (buf == NULL) /* user is just asking for length */
2543                 goto out_len;
2544         if (acl->cached == 0)
2545                 goto out;
2546         ret = -ERANGE; /* see getxattr(2) man page */
2547         if (acl->len > buflen)
2548                 goto out;
2549         memcpy(buf, acl->data, acl->len);
2550 out_len:
2551         ret = acl->len;
2552 out:
2553         spin_unlock(&inode->i_lock);
2554         return ret;
2555 }
2556
2557 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2558 {
2559         struct nfs4_cached_acl *acl;
2560
2561         if (buf && acl_len <= PAGE_SIZE) {
2562                 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2563                 if (acl == NULL)
2564                         goto out;
2565                 acl->cached = 1;
2566                 memcpy(acl->data, buf, acl_len);
2567         } else {
2568                 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2569                 if (acl == NULL)
2570                         goto out;
2571                 acl->cached = 0;
2572         }
2573         acl->len = acl_len;
2574 out:
2575         nfs4_set_cached_acl(inode, acl);
2576 }
2577
2578 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2579 {
2580         struct page *pages[NFS4ACL_MAXPAGES];
2581         struct nfs_getaclargs args = {
2582                 .fh = NFS_FH(inode),
2583                 .acl_pages = pages,
2584                 .acl_len = buflen,
2585         };
2586         size_t resp_len = buflen;
2587         void *resp_buf;
2588         struct rpc_message msg = {
2589                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2590                 .rpc_argp = &args,
2591                 .rpc_resp = &resp_len,
2592         };
2593         struct page *localpage = NULL;
2594         int ret;
2595
2596         if (buflen < PAGE_SIZE) {
2597                 /* As long as we're doing a round trip to the server anyway,
2598                  * let's be prepared for a page of acl data. */
2599                 localpage = alloc_page(GFP_KERNEL);
2600                 resp_buf = page_address(localpage);
2601                 if (localpage == NULL)
2602                         return -ENOMEM;
2603                 args.acl_pages[0] = localpage;
2604                 args.acl_pgbase = 0;
2605                 resp_len = args.acl_len = PAGE_SIZE;
2606         } else {
2607                 resp_buf = buf;
2608                 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2609         }
2610         ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2611         if (ret)
2612                 goto out_free;
2613         if (resp_len > args.acl_len)
2614                 nfs4_write_cached_acl(inode, NULL, resp_len);
2615         else
2616                 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2617         if (buf) {
2618                 ret = -ERANGE;
2619                 if (resp_len > buflen)
2620                         goto out_free;
2621                 if (localpage)
2622                         memcpy(buf, resp_buf, resp_len);
2623         }
2624         ret = resp_len;
2625 out_free:
2626         if (localpage)
2627                 __free_page(localpage);
2628         return ret;
2629 }
2630
2631 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2632 {
2633         struct nfs4_exception exception = { };
2634         ssize_t ret;
2635         do {
2636                 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2637                 if (ret >= 0)
2638                         break;
2639                 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2640         } while (exception.retry);
2641         return ret;
2642 }
2643
2644 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2645 {
2646         struct nfs_server *server = NFS_SERVER(inode);
2647         int ret;
2648
2649         if (!nfs4_server_supports_acls(server))
2650                 return -EOPNOTSUPP;
2651         ret = nfs_revalidate_inode(server, inode);
2652         if (ret < 0)
2653                 return ret;
2654         ret = nfs4_read_cached_acl(inode, buf, buflen);
2655         if (ret != -ENOENT)
2656                 return ret;
2657         return nfs4_get_acl_uncached(inode, buf, buflen);
2658 }
2659
2660 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2661 {
2662         struct nfs_server *server = NFS_SERVER(inode);
2663         struct page *pages[NFS4ACL_MAXPAGES];
2664         struct nfs_setaclargs arg = {
2665                 .fh             = NFS_FH(inode),
2666                 .acl_pages      = pages,
2667                 .acl_len        = buflen,
2668         };
2669         struct rpc_message msg = {
2670                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2671                 .rpc_argp       = &arg,
2672                 .rpc_resp       = NULL,
2673         };
2674         int ret;
2675
2676         if (!nfs4_server_supports_acls(server))
2677                 return -EOPNOTSUPP;
2678         nfs_inode_return_delegation(inode);
2679         buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2680         ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2681         nfs_zap_caches(inode);
2682         return ret;
2683 }
2684
2685 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2686 {
2687         struct nfs4_exception exception = { };
2688         int err;
2689         do {
2690                 err = nfs4_handle_exception(NFS_SERVER(inode),
2691                                 __nfs4_proc_set_acl(inode, buf, buflen),
2692                                 &exception);
2693         } while (exception.retry);
2694         return err;
2695 }
2696
2697 static int
2698 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2699 {
2700         struct nfs_client *clp = server->nfs_client;
2701
2702         if (!clp || task->tk_status >= 0)
2703                 return 0;
2704         switch(task->tk_status) {
2705                 case -NFS4ERR_STALE_CLIENTID:
2706                 case -NFS4ERR_STALE_STATEID:
2707                 case -NFS4ERR_EXPIRED:
2708                         rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2709                         nfs4_schedule_state_recovery(clp);
2710                         if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2711                                 rpc_wake_up_task(task);
2712                         task->tk_status = 0;
2713                         return -EAGAIN;
2714                 case -NFS4ERR_DELAY:
2715                         nfs_inc_server_stats((struct nfs_server *) server,
2716                                                 NFSIOS_DELAY);
2717                 case -NFS4ERR_GRACE:
2718                         rpc_delay(task, NFS4_POLL_RETRY_MAX);
2719                         task->tk_status = 0;
2720                         return -EAGAIN;
2721                 case -NFS4ERR_OLD_STATEID:
2722                         task->tk_status = 0;
2723                         return -EAGAIN;
2724         }
2725         task->tk_status = nfs4_map_errors(task->tk_status);
2726         return 0;
2727 }
2728
2729 static int nfs4_wait_bit_interruptible(void *word)
2730 {
2731         if (signal_pending(current))
2732                 return -ERESTARTSYS;
2733         schedule();
2734         return 0;
2735 }
2736
2737 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2738 {
2739         sigset_t oldset;
2740         int res;
2741
2742         might_sleep();
2743
2744         rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2745
2746         rpc_clnt_sigmask(clnt, &oldset);
2747         res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2748                         nfs4_wait_bit_interruptible,
2749                         TASK_INTERRUPTIBLE);
2750         rpc_clnt_sigunmask(clnt, &oldset);
2751
2752         rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2753         return res;
2754 }
2755
2756 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2757 {
2758         sigset_t oldset;
2759         int res = 0;
2760
2761         might_sleep();
2762
2763         if (*timeout <= 0)
2764                 *timeout = NFS4_POLL_RETRY_MIN;
2765         if (*timeout > NFS4_POLL_RETRY_MAX)
2766                 *timeout = NFS4_POLL_RETRY_MAX;
2767         rpc_clnt_sigmask(clnt, &oldset);
2768         if (clnt->cl_intr) {
2769                 schedule_timeout_interruptible(*timeout);
2770                 if (signalled())
2771                         res = -ERESTARTSYS;
2772         } else
2773                 schedule_timeout_uninterruptible(*timeout);
2774         rpc_clnt_sigunmask(clnt, &oldset);
2775         *timeout <<= 1;
2776         return res;
2777 }
2778
2779 /* This is the error handling routine for processes that are allowed
2780  * to sleep.
2781  */
2782 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2783 {
2784         struct nfs_client *clp = server->nfs_client;
2785         int ret = errorcode;
2786
2787         exception->retry = 0;
2788         switch(errorcode) {
2789                 case 0:
2790                         return 0;
2791                 case -NFS4ERR_STALE_CLIENTID:
2792                 case -NFS4ERR_STALE_STATEID:
2793                 case -NFS4ERR_EXPIRED:
2794                         nfs4_schedule_state_recovery(clp);
2795                         ret = nfs4_wait_clnt_recover(server->client, clp);
2796                         if (ret == 0)
2797                                 exception->retry = 1;
2798                         break;
2799                 case -NFS4ERR_FILE_OPEN:
2800                 case -NFS4ERR_GRACE:
2801                 case -NFS4ERR_DELAY:
2802                         ret = nfs4_delay(server->client, &exception->timeout);
2803                         if (ret != 0)
2804                                 break;
2805                 case -NFS4ERR_OLD_STATEID:
2806                         exception->retry = 1;
2807         }
2808         /* We failed to handle the error */
2809         return nfs4_map_errors(ret);
2810 }
2811
2812 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2813 {
2814         nfs4_verifier sc_verifier;
2815         struct nfs4_setclientid setclientid = {
2816                 .sc_verifier = &sc_verifier,
2817                 .sc_prog = program,
2818         };
2819         struct rpc_message msg = {
2820                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2821                 .rpc_argp = &setclientid,
2822                 .rpc_resp = clp,
2823                 .rpc_cred = cred,
2824         };
2825         __be32 *p;
2826         int loop = 0;
2827         int status;
2828
2829         p = (__be32*)sc_verifier.data;
2830         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2831         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2832
2833         for(;;) {
2834                 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2835                                 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2836                                 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2837                                 cred->cr_ops->cr_name,
2838                                 clp->cl_id_uniquifier);
2839                 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2840                                 sizeof(setclientid.sc_netid), "tcp");
2841                 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2842                                 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2843                                 clp->cl_ipaddr, port >> 8, port & 255);
2844
2845                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2846                 if (status != -NFS4ERR_CLID_INUSE)
2847                         break;
2848                 if (signalled())
2849                         break;
2850                 if (loop++ & 1)
2851                         ssleep(clp->cl_lease_time + 1);
2852                 else
2853                         if (++clp->cl_id_uniquifier == 0)
2854                                 break;
2855         }
2856         return status;
2857 }
2858
2859 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2860 {
2861         struct nfs_fsinfo fsinfo;
2862         struct rpc_message msg = {
2863                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2864                 .rpc_argp = clp,
2865                 .rpc_resp = &fsinfo,
2866                 .rpc_cred = cred,
2867         };
2868         unsigned long now;
2869         int status;
2870
2871         now = jiffies;
2872         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2873         if (status == 0) {
2874                 spin_lock(&clp->cl_lock);
2875                 clp->cl_lease_time = fsinfo.lease_time * HZ;
2876                 clp->cl_last_renewal = now;
2877                 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2878                 spin_unlock(&clp->cl_lock);
2879         }
2880         return status;
2881 }
2882
2883 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2884 {
2885         long timeout;
2886         int err;
2887         do {
2888                 err = _nfs4_proc_setclientid_confirm(clp, cred);
2889                 switch (err) {
2890                         case 0:
2891                                 return err;
2892                         case -NFS4ERR_RESOURCE:
2893                                 /* The IBM lawyers misread another document! */
2894                         case -NFS4ERR_DELAY:
2895                                 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2896                 }
2897         } while (err == 0);
2898         return err;
2899 }
2900
2901 struct nfs4_delegreturndata {
2902         struct nfs4_delegreturnargs args;
2903         struct nfs4_delegreturnres res;
2904         struct nfs_fh fh;
2905         nfs4_stateid stateid;
2906         struct rpc_cred *cred;
2907         unsigned long timestamp;
2908         struct nfs_fattr fattr;
2909         int rpc_status;
2910 };
2911
2912 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2913 {
2914         struct nfs4_delegreturndata *data = calldata;
2915         struct rpc_message msg = {
2916                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2917                 .rpc_argp = &data->args,
2918                 .rpc_resp = &data->res,
2919                 .rpc_cred = data->cred,
2920         };
2921         nfs_fattr_init(data->res.fattr);
2922         rpc_call_setup(task, &msg, 0);
2923 }
2924
2925 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2926 {
2927         struct nfs4_delegreturndata *data = calldata;
2928         data->rpc_status = task->tk_status;
2929         if (data->rpc_status == 0)
2930                 renew_lease(data->res.server, data->timestamp);
2931 }
2932
2933 static void nfs4_delegreturn_release(void *calldata)
2934 {
2935         struct nfs4_delegreturndata *data = calldata;
2936
2937         put_rpccred(data->cred);
2938         kfree(calldata);
2939 }
2940
2941 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2942         .rpc_call_prepare = nfs4_delegreturn_prepare,
2943         .rpc_call_done = nfs4_delegreturn_done,
2944         .rpc_release = nfs4_delegreturn_release,
2945 };
2946
2947 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2948 {
2949         struct nfs4_delegreturndata *data;
2950         struct nfs_server *server = NFS_SERVER(inode);
2951         struct rpc_task *task;
2952         int status;
2953
2954         data = kmalloc(sizeof(*data), GFP_KERNEL);
2955         if (data == NULL)
2956                 return -ENOMEM;
2957         data->args.fhandle = &data->fh;
2958         data->args.stateid = &data->stateid;
2959         data->args.bitmask = server->attr_bitmask;
2960         nfs_copy_fh(&data->fh, NFS_FH(inode));
2961         memcpy(&data->stateid, stateid, sizeof(data->stateid));
2962         data->res.fattr = &data->fattr;
2963         data->res.server = server;
2964         data->cred = get_rpccred(cred);
2965         data->timestamp = jiffies;
2966         data->rpc_status = 0;
2967
2968         task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2969         if (IS_ERR(task))
2970                 return PTR_ERR(task);
2971         status = nfs4_wait_for_completion_rpc_task(task);
2972         if (status == 0) {
2973                 status = data->rpc_status;
2974                 if (status == 0)
2975                         nfs_post_op_update_inode(inode, &data->fattr);
2976         }
2977         rpc_put_task(task);
2978         return status;
2979 }
2980
2981 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2982 {
2983         struct nfs_server *server = NFS_SERVER(inode);
2984         struct nfs4_exception exception = { };
2985         int err;
2986         do {
2987                 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2988                 switch (err) {
2989                         case -NFS4ERR_STALE_STATEID:
2990                         case -NFS4ERR_EXPIRED:
2991                         case 0:
2992                                 return 0;
2993                 }
2994                 err = nfs4_handle_exception(server, err, &exception);
2995         } while (exception.retry);
2996         return err;
2997 }
2998
2999 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3000 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3001
3002 /*
3003  * sleep, with exponential backoff, and retry the LOCK operation.
3004  */
3005 static unsigned long
3006 nfs4_set_lock_task_retry(unsigned long timeout)
3007 {
3008         schedule_timeout_interruptible(timeout);
3009         timeout <<= 1;
3010         if (timeout > NFS4_LOCK_MAXTIMEOUT)
3011                 return NFS4_LOCK_MAXTIMEOUT;
3012         return timeout;
3013 }
3014
3015 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3016 {
3017         struct inode *inode = state->inode;
3018         struct nfs_server *server = NFS_SERVER(inode);
3019         struct nfs_client *clp = server->nfs_client;
3020         struct nfs_lockt_args arg = {
3021                 .fh = NFS_FH(inode),
3022                 .fl = request,
3023         };
3024         struct nfs_lockt_res res = {
3025                 .denied = request,
3026         };
3027         struct rpc_message msg = {
3028                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3029                 .rpc_argp       = &arg,
3030                 .rpc_resp       = &res,
3031                 .rpc_cred       = state->owner->so_cred,
3032         };
3033         struct nfs4_lock_state *lsp;
3034         int status;
3035
3036         down_read(&clp->cl_sem);
3037         arg.lock_owner.clientid = clp->cl_clientid;
3038         status = nfs4_set_lock_state(state, request);
3039         if (status != 0)
3040                 goto out;
3041         lsp = request->fl_u.nfs4_fl.owner;
3042         arg.lock_owner.id = lsp->ls_id;
3043         status = rpc_call_sync(server->client, &msg, 0);
3044         switch (status) {
3045                 case 0:
3046                         request->fl_type = F_UNLCK;
3047                         break;
3048                 case -NFS4ERR_DENIED:
3049                         status = 0;
3050         }
3051         request->fl_ops->fl_release_private(request);
3052 out:
3053         up_read(&clp->cl_sem);
3054         return status;
3055 }
3056
3057 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3058 {
3059         struct nfs4_exception exception = { };
3060         int err;
3061
3062         do {
3063                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3064                                 _nfs4_proc_getlk(state, cmd, request),
3065                                 &exception);
3066         } while (exception.retry);
3067         return err;
3068 }
3069
3070 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3071 {
3072         int res = 0;
3073         switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3074                 case FL_POSIX:
3075                         res = posix_lock_file_wait(file, fl);
3076                         break;
3077                 case FL_FLOCK:
3078                         res = flock_lock_file_wait(file, fl);
3079                         break;
3080                 default:
3081                         BUG();
3082         }
3083         return res;
3084 }
3085
3086 struct nfs4_unlockdata {
3087         struct nfs_locku_args arg;
3088         struct nfs_locku_res res;
3089         struct nfs4_lock_state *lsp;
3090         struct nfs_open_context *ctx;
3091         struct file_lock fl;
3092         const struct nfs_server *server;
3093         unsigned long timestamp;
3094 };
3095
3096 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3097                 struct nfs_open_context *ctx,
3098                 struct nfs4_lock_state *lsp,
3099                 struct nfs_seqid *seqid)
3100 {
3101         struct nfs4_unlockdata *p;
3102         struct inode *inode = lsp->ls_state->inode;
3103
3104         p = kmalloc(sizeof(*p), GFP_KERNEL);
3105         if (p == NULL)
3106                 return NULL;
3107         p->arg.fh = NFS_FH(inode);
3108         p->arg.fl = &p->fl;
3109         p->arg.seqid = seqid;
3110         p->arg.stateid = &lsp->ls_stateid;
3111         p->lsp = lsp;
3112         atomic_inc(&lsp->ls_count);
3113         /* Ensure we don't close file until we're done freeing locks! */
3114         p->ctx = get_nfs_open_context(ctx);
3115         memcpy(&p->fl, fl, sizeof(p->fl));
3116         p->server = NFS_SERVER(inode);
3117         return p;
3118 }
3119
3120 static void nfs4_locku_release_calldata(void *data)
3121 {
3122         struct nfs4_unlockdata *calldata = data;
3123         nfs_free_seqid(calldata->arg.seqid);
3124         nfs4_put_lock_state(calldata->lsp);
3125         put_nfs_open_context(calldata->ctx);
3126         kfree(calldata);
3127 }
3128
3129 static void nfs4_locku_done(struct rpc_task *task, void *data)
3130 {
3131         struct nfs4_unlockdata *calldata = data;
3132
3133         if (RPC_ASSASSINATED(task))
3134                 return;
3135         nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3136         switch (task->tk_status) {
3137                 case 0:
3138                         memcpy(calldata->lsp->ls_stateid.data,
3139                                         calldata->res.stateid.data,
3140                                         sizeof(calldata->lsp->ls_stateid.data));
3141                         renew_lease(calldata->server, calldata->timestamp);
3142                         break;
3143                 case -NFS4ERR_STALE_STATEID:
3144                 case -NFS4ERR_EXPIRED:
3145                         break;
3146                 default:
3147                         if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3148                                 rpc_restart_call(task);
3149         }
3150 }
3151
3152 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3153 {
3154         struct nfs4_unlockdata *calldata = data;
3155         struct rpc_message msg = {
3156                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3157                 .rpc_argp       = &calldata->arg,
3158                 .rpc_resp       = &calldata->res,
3159                 .rpc_cred       = calldata->lsp->ls_state->owner->so_cred,
3160         };
3161
3162         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3163                 return;
3164         if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3165                 /* Note: exit _without_ running nfs4_locku_done */
3166                 task->tk_action = NULL;
3167                 return;
3168         }
3169         calldata->timestamp = jiffies;
3170         rpc_call_setup(task, &msg, 0);
3171 }
3172
3173 static const struct rpc_call_ops nfs4_locku_ops = {
3174         .rpc_call_prepare = nfs4_locku_prepare,
3175         .rpc_call_done = nfs4_locku_done,
3176         .rpc_release = nfs4_locku_release_calldata,
3177 };
3178
3179 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3180                 struct nfs_open_context *ctx,
3181                 struct nfs4_lock_state *lsp,
3182                 struct nfs_seqid *seqid)
3183 {
3184         struct nfs4_unlockdata *data;
3185
3186         data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3187         if (data == NULL) {
3188                 nfs_free_seqid(seqid);
3189                 return ERR_PTR(-ENOMEM);
3190         }
3191
3192         return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3193 }
3194
3195 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3196 {
3197         struct nfs_seqid *seqid;
3198         struct nfs4_lock_state *lsp;
3199         struct rpc_task *task;
3200         int status = 0;
3201
3202         status = nfs4_set_lock_state(state, request);
3203         /* Unlock _before_ we do the RPC call */
3204         request->fl_flags |= FL_EXISTS;
3205         if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3206                 goto out;
3207         if (status != 0)
3208                 goto out;
3209         /* Is this a delegated lock? */
3210         if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3211                 goto out;
3212         lsp = request->fl_u.nfs4_fl.owner;
3213         seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3214         status = -ENOMEM;
3215         if (seqid == NULL)
3216                 goto out;
3217         task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3218         status = PTR_ERR(task);
3219         if (IS_ERR(task))
3220                 goto out;
3221         status = nfs4_wait_for_completion_rpc_task(task);
3222         rpc_put_task(task);
3223 out:
3224         return status;
3225 }
3226
3227 struct nfs4_lockdata {
3228         struct nfs_lock_args arg;
3229         struct nfs_lock_res res;
3230         struct nfs4_lock_state *lsp;
3231         struct nfs_open_context *ctx;
3232         struct file_lock fl;
3233         unsigned long timestamp;
3234         int rpc_status;
3235         int cancelled;
3236 };
3237
3238 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3239                 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3240 {
3241         struct nfs4_lockdata *p;
3242         struct inode *inode = lsp->ls_state->inode;
3243         struct nfs_server *server = NFS_SERVER(inode);
3244
3245         p = kzalloc(sizeof(*p), GFP_KERNEL);
3246         if (p == NULL)
3247                 return NULL;
3248
3249         p->arg.fh = NFS_FH(inode);
3250         p->arg.fl = &p->fl;
3251         p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3252         if (p->arg.lock_seqid == NULL)
3253                 goto out_free;
3254         p->arg.lock_stateid = &lsp->ls_stateid;
3255         p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3256         p->arg.lock_owner.id = lsp->ls_id;
3257         p->lsp = lsp;
3258         atomic_inc(&lsp->ls_count);
3259         p->ctx = get_nfs_open_context(ctx);
3260         memcpy(&p->fl, fl, sizeof(p->fl));
3261         return p;
3262 out_free:
3263         kfree(p);
3264         return NULL;
3265 }
3266
3267 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3268 {
3269         struct nfs4_lockdata *data = calldata;
3270         struct nfs4_state *state = data->lsp->ls_state;
3271         struct nfs4_state_owner *sp = state->owner;
3272         struct rpc_message msg = {
3273                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3274                 .rpc_argp = &data->arg,
3275                 .rpc_resp = &data->res,
3276                 .rpc_cred = sp->so_cred,
3277         };
3278
3279         if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3280                 return;
3281         dprintk("%s: begin!\n", __FUNCTION__);
3282         /* Do we need to do an open_to_lock_owner? */
3283         if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3284                 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3285                 if (data->arg.open_seqid == NULL) {
3286                         data->rpc_status = -ENOMEM;
3287                         task->tk_action = NULL;
3288                         goto out;
3289                 }
3290                 data->arg.open_stateid = &state->stateid;
3291                 data->arg.new_lock_owner = 1;
3292         }
3293         data->timestamp = jiffies;
3294         rpc_call_setup(task, &msg, 0);
3295 out:
3296         dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3297 }
3298
3299 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3300 {
3301         struct nfs4_lockdata *data = calldata;
3302
3303         dprintk("%s: begin!\n", __FUNCTION__);
3304
3305         data->rpc_status = task->tk_status;
3306         if (RPC_ASSASSINATED(task))
3307                 goto out;
3308         if (data->arg.new_lock_owner != 0) {
3309                 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3310                 if (data->rpc_status == 0)
3311                         nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3312                 else
3313                         goto out;
3314         }
3315         if (data->rpc_status == 0) {
3316                 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3317                                         sizeof(data->lsp->ls_stateid.data));
3318                 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3319                 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3320         }
3321         nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3322 out:
3323         dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3324 }
3325
3326 static void nfs4_lock_release(void *calldata)
3327 {
3328         struct nfs4_lockdata *data = calldata;
3329
3330         dprintk("%s: begin!\n", __FUNCTION__);
3331         if (data->arg.open_seqid != NULL)
3332                 nfs_free_seqid(data->arg.open_seqid);
3333         if (data->cancelled != 0) {
3334                 struct rpc_task *task;
3335                 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3336                                 data->arg.lock_seqid);
3337                 if (!IS_ERR(task))
3338                         rpc_put_task(task);
3339                 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3340         } else
3341                 nfs_free_seqid(data->arg.lock_seqid);
3342         nfs4_put_lock_state(data->lsp);
3343         put_nfs_open_context(data->ctx);
3344         kfree(data);
3345         dprintk("%s: done!\n", __FUNCTION__);
3346 }
3347
3348 static const struct rpc_call_ops nfs4_lock_ops = {
3349         .rpc_call_prepare = nfs4_lock_prepare,
3350         .rpc_call_done = nfs4_lock_done,
3351         .rpc_release = nfs4_lock_release,
3352 };
3353
3354 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3355 {
3356         struct nfs4_lockdata *data;
3357         struct rpc_task *task;
3358         int ret;
3359
3360         dprintk("%s: begin!\n", __FUNCTION__);
3361         data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3362                         fl->fl_u.nfs4_fl.owner);
3363         if (data == NULL)
3364                 return -ENOMEM;
3365         if (IS_SETLKW(cmd))
3366                 data->arg.block = 1;
3367         if (reclaim != 0)
3368                 data->arg.reclaim = 1;
3369         task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3370                         &nfs4_lock_ops, data);
3371         if (IS_ERR(task))
3372                 return PTR_ERR(task);
3373         ret = nfs4_wait_for_completion_rpc_task(task);
3374         if (ret == 0) {
3375                 ret = data->rpc_status;
3376                 if (ret == -NFS4ERR_DENIED)
3377                         ret = -EAGAIN;
3378         } else
3379                 data->cancelled = 1;
3380         rpc_put_task(task);
3381         dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3382         return ret;
3383 }
3384
3385 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3386 {
3387         struct nfs_server *server = NFS_SERVER(state->inode);
3388         struct nfs4_exception exception = { };
3389         int err;
3390
3391         do {
3392                 /* Cache the lock if possible... */
3393                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3394                         return 0;
3395                 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3396                 if (err != -NFS4ERR_DELAY)
3397                         break;
3398                 nfs4_handle_exception(server, err, &exception);
3399         } while (exception.retry);
3400         return err;
3401 }
3402
3403 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3404 {
3405         struct nfs_server *server = NFS_SERVER(state->inode);
3406         struct nfs4_exception exception = { };
3407         int err;
3408
3409         err = nfs4_set_lock_state(state, request);
3410         if (err != 0)
3411                 return err;
3412         do {
3413                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3414                         return 0;
3415                 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3416                 if (err != -NFS4ERR_DELAY)
3417                         break;
3418                 nfs4_handle_exception(server, err, &exception);
3419         } while (exception.retry);
3420         return err;
3421 }
3422
3423 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3424 {
3425         struct nfs_client *clp = state->owner->so_client;
3426         unsigned char fl_flags = request->fl_flags;
3427         int status;
3428
3429         /* Is this a delegated open? */
3430         status = nfs4_set_lock_state(state, request);
3431         if (status != 0)
3432                 goto out;
3433         request->fl_flags |= FL_ACCESS;
3434         status = do_vfs_lock(request->fl_file, request);
3435         if (status < 0)
3436                 goto out;
3437         down_read(&clp->cl_sem);
3438         if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3439                 struct nfs_inode *nfsi = NFS_I(state->inode);
3440                 /* Yes: cache locks! */
3441                 down_read(&nfsi->rwsem);
3442                 /* ...but avoid races with delegation recall... */
3443                 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3444                         request->fl_flags = fl_flags & ~FL_SLEEP;
3445                         status = do_vfs_lock(request->fl_file, request);
3446                         up_read(&nfsi->rwsem);
3447                         goto out_unlock;
3448                 }
3449                 up_read(&nfsi->rwsem);
3450         }
3451         status = _nfs4_do_setlk(state, cmd, request, 0);
3452         if (status != 0)
3453                 goto out_unlock;
3454         /* Note: we always want to sleep here! */
3455         request->fl_flags = fl_flags | FL_SLEEP;
3456         if (do_vfs_lock(request->fl_file, request) < 0)
3457                 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3458 out_unlock:
3459         up_read(&clp->cl_sem);
3460 out:
3461         request->fl_flags = fl_flags;
3462         return status;
3463 }
3464
3465 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3466 {
3467         struct nfs4_exception exception = { };
3468         int err;
3469
3470         do {
3471                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3472                                 _nfs4_proc_setlk(state, cmd, request),
3473                                 &exception);
3474         } while (exception.retry);
3475         return err;
3476 }
3477
3478 static int
3479 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3480 {
3481         struct nfs_open_context *ctx;
3482         struct nfs4_state *state;
3483         unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3484         int status;
3485
3486         /* verify open state */
3487         ctx = (struct nfs_open_context *)filp->private_data;
3488         state = ctx->state;
3489
3490         if (request->fl_start < 0 || request->fl_end < 0)
3491                 return -EINVAL;
3492
3493         if (IS_GETLK(cmd))
3494                 return nfs4_proc_getlk(state, F_GETLK, request);
3495
3496         if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3497                 return -EINVAL;
3498
3499         if (request->fl_type == F_UNLCK)
3500                 return nfs4_proc_unlck(state, cmd, request);
3501
3502         do {
3503                 status = nfs4_proc_setlk(state, cmd, request);
3504                 if ((status != -EAGAIN) || IS_SETLK(cmd))
3505                         break;
3506                 timeout = nfs4_set_lock_task_retry(timeout);
3507                 status = -ERESTARTSYS;
3508                 if (signalled())
3509                         break;
3510         } while(status < 0);
3511         return status;
3512 }
3513
3514 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3515 {
3516         struct nfs_server *server = NFS_SERVER(state->inode);
3517         struct nfs4_exception exception = { };
3518         int err;
3519
3520         err = nfs4_set_lock_state(state, fl);
3521         if (err != 0)
3522                 goto out;
3523         do {
3524                 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3525                 if (err != -NFS4ERR_DELAY)
3526                         break;
3527                 err = nfs4_handle_exception(server, err, &exception);
3528         } while (exception.retry);
3529 out:
3530         return err;
3531 }
3532
3533 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3534
3535 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3536                 size_t buflen, int flags)
3537 {
3538         struct inode *inode = dentry->d_inode;
3539
3540         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3541                 return -EOPNOTSUPP;
3542
3543         if (!S_ISREG(inode->i_mode) &&
3544             (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3545                 return -EPERM;
3546
3547         return nfs4_proc_set_acl(inode, buf, buflen);
3548 }
3549
3550 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3551  * and that's what we'll do for e.g. user attributes that haven't been set.
3552  * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3553  * attributes in kernel-managed attribute namespaces. */
3554 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3555                 size_t buflen)
3556 {
3557         struct inode *inode = dentry->d_inode;
3558
3559         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3560                 return -EOPNOTSUPP;
3561
3562         return nfs4_proc_get_acl(inode, buf, buflen);
3563 }
3564
3565 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3566 {
3567         size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3568
3569         if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3570                 return 0;
3571         if (buf && buflen < len)
3572                 return -ERANGE;
3573         if (buf)
3574                 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3575         return len;
3576 }
3577
3578 int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
3579                 struct nfs4_fs_locations *fs_locations, struct page *page)
3580 {
3581         struct nfs_server *server = NFS_SERVER(dir);
3582         u32 bitmask[2] = {
3583                 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3584                 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3585         };
3586         struct nfs4_fs_locations_arg args = {
3587                 .dir_fh = NFS_FH(dir),
3588                 .name = name,
3589                 .page = page,
3590                 .bitmask = bitmask,
3591         };
3592         struct rpc_message msg = {
3593                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3594                 .rpc_argp = &args,
3595                 .rpc_resp = fs_locations,
3596         };
3597         int status;
3598
3599         dprintk("%s: start\n", __FUNCTION__);
3600         nfs_fattr_init(&fs_locations->fattr);
3601         fs_locations->server = server;
3602         fs_locations->nlocations = 0;
3603         status = rpc_call_sync(server->client, &msg, 0);
3604         dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3605         return status;
3606 }
3607
3608 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3609         .recover_open   = nfs4_open_reclaim,
3610         .recover_lock   = nfs4_lock_reclaim,
3611 };
3612
3613 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3614         .recover_open   = nfs4_open_expired,
3615         .recover_lock   = nfs4_lock_expired,
3616 };
3617
3618 static const struct inode_operations nfs4_file_inode_operations = {
3619         .permission     = nfs_permission,
3620         .getattr        = nfs_getattr,
3621         .setattr        = nfs_setattr,
3622         .getxattr       = nfs4_getxattr,
3623         .setxattr       = nfs4_setxattr,
3624         .listxattr      = nfs4_listxattr,
3625 };
3626
3627 const struct nfs_rpc_ops nfs_v4_clientops = {
3628         .version        = 4,                    /* protocol version */
3629         .dentry_ops     = &nfs4_dentry_operations,
3630         .dir_inode_ops  = &nfs4_dir_inode_operations,
3631         .file_inode_ops = &nfs4_file_inode_operations,
3632         .getroot        = nfs4_proc_get_root,
3633         .getattr        = nfs4_proc_getattr,
3634         .setattr        = nfs4_proc_setattr,
3635         .lookupfh       = nfs4_proc_lookupfh,
3636         .lookup         = nfs4_proc_lookup,
3637         .access         = nfs4_proc_access,
3638         .readlink       = nfs4_proc_readlink,
3639         .create         = nfs4_proc_create,
3640         .remove         = nfs4_proc_remove,
3641         .unlink_setup   = nfs4_proc_unlink_setup,
3642         .unlink_done    = nfs4_proc_unlink_done,
3643         .rename         = nfs4_proc_rename,
3644         .link           = nfs4_proc_link,
3645         .symlink        = nfs4_proc_symlink,
3646         .mkdir          = nfs4_proc_mkdir,
3647         .rmdir          = nfs4_proc_remove,
3648         .readdir        = nfs4_proc_readdir,
3649         .mknod          = nfs4_proc_mknod,
3650         .statfs         = nfs4_proc_statfs,
3651         .fsinfo         = nfs4_proc_fsinfo,
3652         .pathconf       = nfs4_proc_pathconf,
3653         .set_capabilities = nfs4_server_capabilities,
3654         .decode_dirent  = nfs4_decode_dirent,
3655         .read_setup     = nfs4_proc_read_setup,
3656         .read_done      = nfs4_read_done,
3657         .write_setup    = nfs4_proc_write_setup,
3658         .write_done     = nfs4_write_done,
3659         .commit_setup   = nfs4_proc_commit_setup,
3660         .commit_done    = nfs4_commit_done,
3661         .file_open      = nfs_open,
3662         .file_release   = nfs_release,
3663         .lock           = nfs4_proc_lock,
3664         .clear_acl_cache = nfs4_zap_acl_attr,
3665 };
3666
3667 /*
3668  * Local variables:
3669  *  c-basic-offset: 8
3670  * End:
3671  */