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 dentry *dentry;
 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 dentry *dentry,
 234                 struct nfs4_state_owner *sp, int flags,
 235                 const struct iattr *attrs)
 236 {
 237         struct dentry *parent = dget_parent(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->dentry = dget(dentry);
 250         p->dir = parent;
 251         p->owner = sp;
 252         atomic_inc(&sp->so_count);
 253         p->o_arg.fh = NFS_FH(dir);
 254         p->o_arg.open_flags = flags,
 255         p->o_arg.clientid = server->nfs_client->cl_clientid;
 256         p->o_arg.id = sp->so_id;
 257         p->o_arg.name = &dentry->d_name;
 258         p->o_arg.server = server;
 259         p->o_arg.bitmask = server->attr_bitmask;
 260         p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
 261         p->o_res.f_attr = &p->f_attr;
 262         p->o_res.dir_attr = &p->dir_attr;
 263         p->o_res.server = server;
 264         nfs_fattr_init(&p->f_attr);
 265         nfs_fattr_init(&p->dir_attr);
 266         if (flags & O_EXCL) {
 267                 u32 *s = (u32 *) p->o_arg.u.verifier.data;
 268                 s[0] = jiffies;
 269                 s[1] = current->pid;
 270         } else if (flags & O_CREAT) {
 271                 p->o_arg.u.attrs = &p->attrs;
 272                 memcpy(&p->attrs, attrs, sizeof(p->attrs));
 273         }
 274         p->c_arg.fh = &p->o_res.fh;
 275         p->c_arg.stateid = &p->o_res.stateid;
 276         p->c_arg.seqid = p->o_arg.seqid;
 277         return p;
 278 err_free:
 279         kfree(p);
 280 err:
 281         dput(parent);
 282         return NULL;
 283 }
 284
 285 static void nfs4_opendata_free(struct nfs4_opendata *p)
 286 {
 287         if (p != NULL && atomic_dec_and_test(&p->count)) {
 288                 nfs_free_seqid(p->o_arg.seqid);
 289                 nfs4_put_state_owner(p->owner);
 290                 dput(p->dir);
 291                 dput(p->dentry);
 292                 kfree(p);
 293         }
 294 }
 295
 296 /* Helper for asynchronous RPC calls */
 297 static int nfs4_call_async(struct rpc_clnt *clnt,
 298                 const struct rpc_call_ops *tk_ops, void *calldata)
 299 {
 300         struct rpc_task *task;
 301
 302         if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
 303                 return -ENOMEM;
 304         rpc_execute(task);
 305         return 0;
 306 }
 307
 308 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
 309 {
 310         sigset_t oldset;
 311         int ret;
 312
 313         rpc_clnt_sigmask(task->tk_client, &oldset);
 314         ret = rpc_wait_for_completion_task(task);
 315         rpc_clnt_sigunmask(task->tk_client, &oldset);
 316         return ret;
 317 }
 318
 319 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
 320 {
 321         switch (open_flags) {
 322                 case FMODE_WRITE:
 323                         state->n_wronly++;
 324                         break;
 325                 case FMODE_READ:
 326                         state->n_rdonly++;
 327                         break;
 328                 case FMODE_READ|FMODE_WRITE:
 329                         state->n_rdwr++;
 330         }
 331 }
 332
 333 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
 334 {
 335         struct inode *inode = state->inode;
 336
 337         open_flags &= (FMODE_READ|FMODE_WRITE);
 338         /* Protect against nfs4_find_state_byowner() */
 339         spin_lock(&state->owner->so_lock);
 340         spin_lock(&inode->i_lock);
 341         memcpy(&state->stateid, stateid, sizeof(state->stateid));
 342         update_open_stateflags(state, open_flags);
 343         nfs4_state_set_mode_locked(state, state->state | open_flags);
 344         spin_unlock(&inode->i_lock);
 345         spin_unlock(&state->owner->so_lock);
 346 }
 347
 348 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
 349 {
 350         struct inode *inode;
 351         struct nfs4_state *state = NULL;
 352
 353         if (!(data->f_attr.valid & NFS_ATTR_FATTR))
 354                 goto out;
 355         inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
 356         if (IS_ERR(inode))
 357                 goto out;
 358         state = nfs4_get_open_state(inode, data->owner);
 359         if (state == NULL)
 360                 goto put_inode;
 361         update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
 362 put_inode:
 363         iput(inode);
 364 out:
 365         return state;
 366 }
 367
 368 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
 369 {
 370         struct nfs_inode *nfsi = NFS_I(state->inode);
 371         struct nfs_open_context *ctx;
 372
 373         spin_lock(&state->inode->i_lock);
 374         list_for_each_entry(ctx, &nfsi->open_files, list) {
 375                 if (ctx->state != state)
 376                         continue;
 377                 get_nfs_open_context(ctx);
 378                 spin_unlock(&state->inode->i_lock);
 379                 return ctx;
 380         }
 381         spin_unlock(&state->inode->i_lock);
 382         return ERR_PTR(-ENOENT);
 383 }
 384
 385 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
 386 {
 387         int ret;
 388
 389         opendata->o_arg.open_flags = openflags;
 390         ret = _nfs4_proc_open(opendata);
 391         if (ret != 0)
 392                 return ret;
 393         memcpy(stateid->data, opendata->o_res.stateid.data,
 394                         sizeof(stateid->data));
 395         return 0;
 396 }
 397
 398 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
 399 {
 400         nfs4_stateid stateid;
 401         struct nfs4_state *newstate;
 402         int mode = 0;
 403         int delegation = 0;
 404         int ret;
 405
 406         /* memory barrier prior to reading state->n_* */
 407         smp_rmb();
 408         if (state->n_rdwr != 0) {
 409                 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
 410                 if (ret != 0)
 411                         return ret;
 412                 mode |= FMODE_READ|FMODE_WRITE;
 413                 if (opendata->o_res.delegation_type != 0)
 414                         delegation = opendata->o_res.delegation_type;
 415                 smp_rmb();
 416         }
 417         if (state->n_wronly != 0) {
 418                 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
 419                 if (ret != 0)
 420                         return ret;
 421                 mode |= FMODE_WRITE;
 422                 if (opendata->o_res.delegation_type != 0)
 423                         delegation = opendata->o_res.delegation_type;
 424                 smp_rmb();
 425         }
 426         if (state->n_rdonly != 0) {
 427                 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
 428                 if (ret != 0)
 429                         return ret;
 430                 mode |= FMODE_READ;
 431         }
 432         clear_bit(NFS_DELEGATED_STATE, &state->flags);
 433         if (mode == 0)
 434                 return 0;
 435         if (opendata->o_res.delegation_type == 0)
 436                 opendata->o_res.delegation_type = delegation;
 437         opendata->o_arg.open_flags |= mode;
 438         newstate = nfs4_opendata_to_nfs4_state(opendata);
 439         if (newstate != NULL) {
 440                 if (opendata->o_res.delegation_type != 0) {
 441                         struct nfs_inode *nfsi = NFS_I(newstate->inode);
 442                         int delegation_flags = 0;
 443                         if (nfsi->delegation)
 444                                 delegation_flags = nfsi->delegation->flags;
 445                         if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
 446                                 nfs_inode_set_delegation(newstate->inode,
 447                                                 opendata->owner->so_cred,
 448                                                 &opendata->o_res);
 449                         else
 450                                 nfs_inode_reclaim_delegation(newstate->inode,
 451                                                 opendata->owner->so_cred,
 452                                                 &opendata->o_res);
 453                 }
 454                 nfs4_close_state(newstate, opendata->o_arg.open_flags);
 455         }
 456         if (newstate != state)
 457                 return -ESTALE;
 458         return 0;
 459 }
 460
 461 /*
 462  * OPEN_RECLAIM:
 463  *      reclaim state on the server after a reboot.
 464  */
 465 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
 466 {
 467         struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
 468         struct nfs4_opendata *opendata;
 469         int delegation_type = 0;
 470         int status;
 471
 472         if (delegation != NULL) {
 473                 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
 474                         memcpy(&state->stateid, &delegation->stateid,
 475                                         sizeof(state->stateid));
 476                         set_bit(NFS_DELEGATED_STATE, &state->flags);
 477                         return 0;
 478                 }
 479                 delegation_type = delegation->type;
 480         }
 481         opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
 482         if (opendata == NULL)
 483                 return -ENOMEM;
 484         opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
 485         opendata->o_arg.fh = NFS_FH(state->inode);
 486         nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
 487         opendata->o_arg.u.delegation_type = delegation_type;
 488         status = nfs4_open_recover(opendata, state);
 489         nfs4_opendata_free(opendata);
 490         return status;
 491 }
 492
 493 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
 494 {
 495         struct nfs_server *server = NFS_SERVER(state->inode);
 496         struct nfs4_exception exception = { };
 497         int err;
 498         do {
 499                 err = _nfs4_do_open_reclaim(sp, state, dentry);
 500                 if (err != -NFS4ERR_DELAY)
 501                         break;
 502                 nfs4_handle_exception(server, err, &exception);
 503         } while (exception.retry);
 504         return err;
 505 }
 506
 507 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
 508 {
 509         struct nfs_open_context *ctx;
 510         int ret;
 511
 512         ctx = nfs4_state_find_open_context(state);
 513         if (IS_ERR(ctx))
 514                 return PTR_ERR(ctx);
 515         ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
 516         put_nfs_open_context(ctx);
 517         return ret;
 518 }
 519
 520 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
 521 {
 522         struct nfs4_state_owner  *sp  = state->owner;
 523         struct nfs4_opendata *opendata;
 524         int ret;
 525
 526         if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
 527                 return 0;
 528         opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
 529         if (opendata == NULL)
 530                 return -ENOMEM;
 531         opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
 532         memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
 533                         sizeof(opendata->o_arg.u.delegation.data));
 534         ret = nfs4_open_recover(opendata, state);
 535         nfs4_opendata_free(opendata);
 536         return ret;
 537 }
 538
 539 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
 540 {
 541         struct nfs4_exception exception = { };
 542         struct nfs_server *server = NFS_SERVER(dentry->d_inode);
 543         int err;
 544         do {
 545                 err = _nfs4_open_delegation_recall(dentry, state);
 546                 switch (err) {
 547                         case 0:
 548                                 return err;
 549                         case -NFS4ERR_STALE_CLIENTID:
 550                         case -NFS4ERR_STALE_STATEID:
 551                         case -NFS4ERR_EXPIRED:
 552                                 /* Don't recall a delegation if it was lost */
 553                                 nfs4_schedule_state_recovery(server->nfs_client);
 554                                 return err;
 555                 }
 556                 err = nfs4_handle_exception(server, err, &exception);
 557         } while (exception.retry);
 558         return err;
 559 }
 560
 561 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
 562 {
 563         struct nfs4_opendata *data = calldata;
 564         struct  rpc_message msg = {
 565                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
 566                 .rpc_argp = &data->c_arg,
 567                 .rpc_resp = &data->c_res,
 568                 .rpc_cred = data->owner->so_cred,
 569         };
 570         data->timestamp = jiffies;
 571         rpc_call_setup(task, &msg, 0);
 572 }
 573
 574 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
 575 {
 576         struct nfs4_opendata *data = calldata;
 577
 578         data->rpc_status = task->tk_status;
 579         if (RPC_ASSASSINATED(task))
 580                 return;
 581         if (data->rpc_status == 0) {
 582                 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
 583                                 sizeof(data->o_res.stateid.data));
 584                 renew_lease(data->o_res.server, data->timestamp);
 585         }
 586         nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
 587         nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
 588 }
 589
 590 static void nfs4_open_confirm_release(void *calldata)
 591 {
 592         struct nfs4_opendata *data = calldata;
 593         struct nfs4_state *state = NULL;
 594
 595         /* If this request hasn't been cancelled, do nothing */
 596         if (data->cancelled == 0)
 597                 goto out_free;
 598         /* In case of error, no cleanup! */
 599         if (data->rpc_status != 0)
 600                 goto out_free;
 601         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 602         state = nfs4_opendata_to_nfs4_state(data);
 603         if (state != NULL)
 604                 nfs4_close_state(state, data->o_arg.open_flags);
 605 out_free:
 606         nfs4_opendata_free(data);
 607 }
 608
 609 static const struct rpc_call_ops nfs4_open_confirm_ops = {
 610         .rpc_call_prepare = nfs4_open_confirm_prepare,
 611         .rpc_call_done = nfs4_open_confirm_done,
 612         .rpc_release = nfs4_open_confirm_release,
 613 };
 614
 615 /*
 616  * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
 617  */
 618 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
 619 {
 620         struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
 621         struct rpc_task *task;
 622         int status;
 623
 624         atomic_inc(&data->count);
 625         /*
 626          * If rpc_run_task() ends up calling ->rpc_release(), we
 627          * want to ensure that it takes the 'error' code path.
 628          */
 629         data->rpc_status = -ENOMEM;
 630         task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
 631         if (IS_ERR(task))
 632                 return PTR_ERR(task);
 633         status = nfs4_wait_for_completion_rpc_task(task);
 634         if (status != 0) {
 635                 data->cancelled = 1;
 636                 smp_wmb();
 637         } else
 638                 status = data->rpc_status;
 639         rpc_put_task(task);
 640         return status;
 641 }
 642
 643 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
 644 {
 645         struct nfs4_opendata *data = calldata;
 646         struct nfs4_state_owner *sp = data->owner;
 647         struct rpc_message msg = {
 648                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
 649                 .rpc_argp = &data->o_arg,
 650                 .rpc_resp = &data->o_res,
 651                 .rpc_cred = sp->so_cred,
 652         };
 653
 654         if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
 655                 return;
 656         /* Update sequence id. */
 657         data->o_arg.id = sp->so_id;
 658         data->o_arg.clientid = sp->so_client->cl_clientid;
 659         if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
 660                 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
 661         data->timestamp = jiffies;
 662         rpc_call_setup(task, &msg, 0);
 663 }
 664
 665 static void nfs4_open_done(struct rpc_task *task, void *calldata)
 666 {
 667         struct nfs4_opendata *data = calldata;
 668
 669         data->rpc_status = task->tk_status;
 670         if (RPC_ASSASSINATED(task))
 671                 return;
 672         if (task->tk_status == 0) {
 673                 switch (data->o_res.f_attr->mode & S_IFMT) {
 674                         case S_IFREG:
 675                                 break;
 676                         case S_IFLNK:
 677                                 data->rpc_status = -ELOOP;
 678                                 break;
 679                         case S_IFDIR:
 680                                 data->rpc_status = -EISDIR;
 681                                 break;
 682                         default:
 683                                 data->rpc_status = -ENOTDIR;
 684                 }
 685                 renew_lease(data->o_res.server, data->timestamp);
 686         }
 687         nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
 688 }
 689
 690 static void nfs4_open_release(void *calldata)
 691 {
 692         struct nfs4_opendata *data = calldata;
 693         struct nfs4_state *state = NULL;
 694
 695         /* If this request hasn't been cancelled, do nothing */
 696         if (data->cancelled == 0)
 697                 goto out_free;
 698         /* In case of error, no cleanup! */
 699         if (data->rpc_status != 0)
 700                 goto out_free;
 701         /* In case we need an open_confirm, no cleanup! */
 702         if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
 703                 goto out_free;
 704         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 705         state = nfs4_opendata_to_nfs4_state(data);
 706         if (state != NULL)
 707                 nfs4_close_state(state, data->o_arg.open_flags);
 708 out_free:
 709         nfs4_opendata_free(data);
 710 }
 711
 712 static const struct rpc_call_ops nfs4_open_ops = {
 713         .rpc_call_prepare = nfs4_open_prepare,
 714         .rpc_call_done = nfs4_open_done,
 715         .rpc_release = nfs4_open_release,
 716 };
 717
 718 /*
 719  * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
 720  */
 721 static int _nfs4_proc_open(struct nfs4_opendata *data)
 722 {
 723         struct inode *dir = data->dir->d_inode;
 724         struct nfs_server *server = NFS_SERVER(dir);
 725         struct nfs_openargs *o_arg = &data->o_arg;
 726         struct nfs_openres *o_res = &data->o_res;
 727         struct rpc_task *task;
 728         int status;
 729
 730         atomic_inc(&data->count);
 731         /*
 732          * If rpc_run_task() ends up calling ->rpc_release(), we
 733          * want to ensure that it takes the 'error' code path.
 734          */
 735         data->rpc_status = -ENOMEM;
 736         task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
 737         if (IS_ERR(task))
 738                 return PTR_ERR(task);
 739         status = nfs4_wait_for_completion_rpc_task(task);
 740         if (status != 0) {
 741                 data->cancelled = 1;
 742                 smp_wmb();
 743         } else
 744                 status = data->rpc_status;
 745         rpc_put_task(task);
 746         if (status != 0)
 747                 return status;
 748
 749         if (o_arg->open_flags & O_CREAT) {
 750                 update_changeattr(dir, &o_res->cinfo);
 751                 nfs_post_op_update_inode(dir, o_res->dir_attr);
 752         } else
 753                 nfs_refresh_inode(dir, o_res->dir_attr);
 754         if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
 755                 status = _nfs4_proc_open_confirm(data);
 756                 if (status != 0)
 757                         return status;
 758         }
 759         nfs_confirm_seqid(&data->owner->so_seqid, 0);
 760         if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
 761                 return server->nfs_client->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
 762         return 0;
 763 }
 764
 765 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
 766 {
 767         struct nfs_access_entry cache;
 768         int mask = 0;
 769         int status;
 770
 771         if (openflags & FMODE_READ)
 772                 mask |= MAY_READ;
 773         if (openflags & FMODE_WRITE)
 774                 mask |= MAY_WRITE;
 775         status = nfs_access_get_cached(inode, cred, &cache);
 776         if (status == 0)
 777                 goto out;
 778
 779         /* Be clever: ask server to check for all possible rights */
 780         cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
 781         cache.cred = cred;
 782         cache.jiffies = jiffies;
 783         status = _nfs4_proc_access(inode, &cache);
 784         if (status != 0)
 785                 return status;
 786         nfs_access_add_cache(inode, &cache);
 787 out:
 788         if ((cache.mask & mask) == mask)
 789                 return 0;
 790         return -EACCES;
 791 }
 792
 793 int nfs4_recover_expired_lease(struct nfs_server *server)
 794 {
 795         struct nfs_client *clp = server->nfs_client;
 796         int ret;
 797
 798         for (;;) {
 799                 ret = nfs4_wait_clnt_recover(server->client, clp);
 800                 if (ret != 0)
 801                         return ret;
 802                 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
 803                         break;
 804                 nfs4_schedule_state_recovery(clp);
 805         }
 806         return 0;
 807 }
 808
 809 /*
 810  * OPEN_EXPIRED:
 811  *      reclaim state on the server after a network partition.
 812  *      Assumes caller holds the appropriate lock
 813  */
 814 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
 815 {
 816         struct inode *inode = state->inode;
 817         struct nfs_delegation *delegation = NFS_I(inode)->delegation;
 818         struct nfs4_opendata *opendata;
 819         int openflags = state->state & (FMODE_READ|FMODE_WRITE);
 820         int ret;
 821
 822         if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
 823                 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
 824                 if (ret < 0)
 825                         return ret;
 826                 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
 827                 set_bit(NFS_DELEGATED_STATE, &state->flags);
 828                 return 0;
 829         }
 830         opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
 831         if (opendata == NULL)
 832                 return -ENOMEM;
 833         ret = nfs4_open_recover(opendata, state);
 834         if (ret == -ESTALE) {
 835                 /* Invalidate the state owner so we don't ever use it again */
 836                 nfs4_drop_state_owner(sp);
 837                 d_drop(dentry);
 838         }
 839         nfs4_opendata_free(opendata);
 840         return ret;
 841 }
 842
 843 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
 844 {
 845         struct nfs_server *server = NFS_SERVER(dentry->d_inode);
 846         struct nfs4_exception exception = { };
 847         int err;
 848
 849         do {
 850                 err = _nfs4_open_expired(sp, state, dentry);
 851                 if (err == -NFS4ERR_DELAY)
 852                         nfs4_handle_exception(server, err, &exception);
 853         } while (exception.retry);
 854         return err;
 855 }
 856
 857 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
 858 {
 859         struct nfs_open_context *ctx;
 860         int ret;
 861
 862         ctx = nfs4_state_find_open_context(state);
 863         if (IS_ERR(ctx))
 864                 return PTR_ERR(ctx);
 865         ret = nfs4_do_open_expired(sp, state, ctx->dentry);
 866         put_nfs_open_context(ctx);
 867         return ret;
 868 }
 869
 870 /*
 871  * Returns a referenced nfs4_state if there is an open delegation on the file
 872  */
 873 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
 874 {
 875         struct nfs_delegation *delegation;
 876         struct nfs_server *server = NFS_SERVER(inode);
 877         struct nfs_client *clp = server->nfs_client;
 878         struct nfs_inode *nfsi = NFS_I(inode);
 879         struct nfs4_state_owner *sp = NULL;
 880         struct nfs4_state *state = NULL;
 881         int open_flags = flags & (FMODE_READ|FMODE_WRITE);
 882         int err;
 883
 884         err = -ENOMEM;
 885         if (!(sp = nfs4_get_state_owner(server, cred))) {
 886                 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
 887                 return err;
 888         }
 889         err = nfs4_recover_expired_lease(server);
 890         if (err != 0)
 891                 goto out_put_state_owner;
 892         /* Protect against reboot recovery - NOTE ORDER! */
 893         down_read(&clp->cl_sem);
 894         /* Protect against delegation recall */
 895         down_read(&nfsi->rwsem);
 896         delegation = NFS_I(inode)->delegation;
 897         err = -ENOENT;
 898         if (delegation == NULL || (delegation->type & open_flags) != open_flags)
 899                 goto out_err;
 900         err = -ENOMEM;
 901         state = nfs4_get_open_state(inode, sp);
 902         if (state == NULL)
 903                 goto out_err;
 904
 905         err = -ENOENT;
 906         if ((state->state & open_flags) == open_flags) {
 907                 spin_lock(&inode->i_lock);
 908                 update_open_stateflags(state, open_flags);
 909                 spin_unlock(&inode->i_lock);
 910                 goto out_ok;
 911         } else if (state->state != 0)
 912                 goto out_put_open_state;
 913
 914         lock_kernel();
 915         err = _nfs4_do_access(inode, cred, open_flags);
 916         unlock_kernel();
 917         if (err != 0)
 918                 goto out_put_open_state;
 919         set_bit(NFS_DELEGATED_STATE, &state->flags);
 920         update_open_stateid(state, &delegation->stateid, open_flags);
 921 out_ok:
 922         nfs4_put_state_owner(sp);
 923         up_read(&nfsi->rwsem);
 924         up_read(&clp->cl_sem);
 925         *res = state;
 926         return 0;
 927 out_put_open_state:
 928         nfs4_put_open_state(state);
 929 out_err:
 930         up_read(&nfsi->rwsem);
 931         up_read(&clp->cl_sem);
 932         if (err != -EACCES)
 933                 nfs_inode_return_delegation(inode);
 934 out_put_state_owner:
 935         nfs4_put_state_owner(sp);
 936         return err;
 937 }
 938
 939 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
 940 {
 941         struct nfs4_exception exception = { };
 942         struct nfs4_state *res = ERR_PTR(-EIO);
 943         int err;
 944
 945         do {
 946                 err = _nfs4_open_delegated(inode, flags, cred, &res);
 947                 if (err == 0)
 948                         break;
 949                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
 950                                         err, &exception));
 951         } while (exception.retry);
 952         return res;
 953 }
 954
 955 /*
 956  * Returns a referenced nfs4_state
 957  */
 958 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
 959 {
 960         struct nfs4_state_owner  *sp;
 961         struct nfs4_state     *state = NULL;
 962         struct nfs_server       *server = NFS_SERVER(dir);
 963         struct nfs_client *clp = server->nfs_client;
 964         struct nfs4_opendata *opendata;
 965         int                     status;
 966
 967         /* Protect against reboot recovery conflicts */
 968         status = -ENOMEM;
 969         if (!(sp = nfs4_get_state_owner(server, cred))) {
 970                 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
 971                 goto out_err;
 972         }
 973         status = nfs4_recover_expired_lease(server);
 974         if (status != 0)
 975                 goto err_put_state_owner;
 976         down_read(&clp->cl_sem);
 977         status = -ENOMEM;
 978         opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
 979         if (opendata == NULL)
 980                 goto err_release_rwsem;
 981
 982         status = _nfs4_proc_open(opendata);
 983         if (status != 0)
 984                 goto err_opendata_free;
 985
 986         status = -ENOMEM;
 987         state = nfs4_opendata_to_nfs4_state(opendata);
 988         if (state == NULL)
 989                 goto err_opendata_free;
 990         if (opendata->o_res.delegation_type != 0)
 991                 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
 992         nfs4_opendata_free(opendata);
 993         nfs4_put_state_owner(sp);
 994         up_read(&clp->cl_sem);
 995         *res = state;
 996         return 0;
 997 err_opendata_free:
 998         nfs4_opendata_free(opendata);
 999 err_release_rwsem:
1000         up_read(&clp->cl_sem);
1001 err_put_state_owner:
1002         nfs4_put_state_owner(sp);
1003 out_err:
1004         *res = NULL;
1005         return status;
1006 }
1007
1008
1009 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1010 {
1011         struct nfs4_exception exception = { };
1012         struct nfs4_state *res;
1013         int status;
1014
1015         do {
1016                 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1017                 if (status == 0)
1018                         break;
1019                 /* NOTE: BAD_SEQID means the server and client disagree about the
1020                  * book-keeping w.r.t. state-changing operations
1021                  * (OPEN/CLOSE/LOCK/LOCKU...)
1022                  * It is actually a sign of a bug on the client or on the server.
1023                  *
1024                  * If we receive a BAD_SEQID error in the particular case of
1025                  * doing an OPEN, we assume that nfs_increment_open_seqid() will
1026                  * have unhashed the old state_owner for us, and that we can
1027                  * therefore safely retry using a new one. We should still warn
1028                  * the user though...
1029                  */
1030                 if (status == -NFS4ERR_BAD_SEQID) {
1031                         printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1032                         exception.retry = 1;
1033                         continue;
1034                 }
1035                 /*
1036                  * BAD_STATEID on OPEN means that the server cancelled our
1037                  * state before it received the OPEN_CONFIRM.
1038                  * Recover by retrying the request as per the discussion
1039                  * on Page 181 of RFC3530.
1040                  */
1041                 if (status == -NFS4ERR_BAD_STATEID) {
1042                         exception.retry = 1;
1043                         continue;
1044                 }
1045                 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1046                                         status, &exception));
1047         } while (exception.retry);
1048         return res;
1049 }
1050
1051 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1052                 struct iattr *sattr, struct nfs4_state *state)
1053 {
1054         struct nfs_server *server = NFS_SERVER(inode);
1055         struct nfs_setattrargs  arg = {
1056                 .fh             = NFS_FH(inode),
1057                 .iap            = sattr,
1058                 .server         = server,
1059                 .bitmask = server->attr_bitmask,
1060         };
1061         struct nfs_setattrres  res = {
1062                 .fattr          = fattr,
1063                 .server         = server,
1064         };
1065         struct rpc_message msg = {
1066                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1067                 .rpc_argp       = &arg,
1068                 .rpc_resp       = &res,
1069         };
1070         unsigned long timestamp = jiffies;
1071         int status;
1072
1073         nfs_fattr_init(fattr);
1074
1075         if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1076                 /* Use that stateid */
1077         } else if (state != NULL) {
1078                 msg.rpc_cred = state->owner->so_cred;
1079                 nfs4_copy_stateid(&arg.stateid, state, current->files);
1080         } else
1081                 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1082
1083         status = rpc_call_sync(server->client, &msg, 0);
1084         if (status == 0 && state != NULL)
1085                 renew_lease(server, timestamp);
1086         return status;
1087 }
1088
1089 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1090                 struct iattr *sattr, struct nfs4_state *state)
1091 {
1092         struct nfs_server *server = NFS_SERVER(inode);
1093         struct nfs4_exception exception = { };
1094         int err;
1095         do {
1096                 err = nfs4_handle_exception(server,
1097                                 _nfs4_do_setattr(inode, fattr, sattr, state),
1098                                 &exception);
1099         } while (exception.retry);
1100         return err;
1101 }
1102
1103 struct nfs4_closedata {
1104         struct inode *inode;
1105         struct nfs4_state *state;
1106         struct nfs_closeargs arg;
1107         struct nfs_closeres res;
1108         struct nfs_fattr fattr;
1109         unsigned long timestamp;
1110 };
1111
1112 static void nfs4_free_closedata(void *data)
1113 {
1114         struct nfs4_closedata *calldata = data;
1115         struct nfs4_state_owner *sp = calldata->state->owner;
1116
1117         nfs4_put_open_state(calldata->state);
1118         nfs_free_seqid(calldata->arg.seqid);
1119         nfs4_put_state_owner(sp);
1120         kfree(calldata);
1121 }
1122
1123 static void nfs4_close_done(struct rpc_task *task, void *data)
1124 {
1125         struct nfs4_closedata *calldata = data;
1126         struct nfs4_state *state = calldata->state;
1127         struct nfs_server *server = NFS_SERVER(calldata->inode);
1128
1129         if (RPC_ASSASSINATED(task))
1130                 return;
1131         /* hmm. we are done with the inode, and in the process of freeing
1132          * the state_owner. we keep this around to process errors
1133          */
1134         nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1135         switch (task->tk_status) {
1136                 case 0:
1137                         memcpy(&state->stateid, &calldata->res.stateid,
1138                                         sizeof(state->stateid));
1139                         renew_lease(server, calldata->timestamp);
1140                         break;
1141                 case -NFS4ERR_STALE_STATEID:
1142                 case -NFS4ERR_EXPIRED:
1143                         nfs4_schedule_state_recovery(server->nfs_client);
1144                         break;
1145                 default:
1146                         if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1147                                 rpc_restart_call(task);
1148                                 return;
1149                         }
1150         }
1151         nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1152 }
1153
1154 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1155 {
1156         struct nfs4_closedata *calldata = data;
1157         struct nfs4_state *state = calldata->state;
1158         struct rpc_message msg = {
1159                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1160                 .rpc_argp = &calldata->arg,
1161                 .rpc_resp = &calldata->res,
1162                 .rpc_cred = state->owner->so_cred,
1163         };
1164         int mode = 0, old_mode;
1165
1166         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1167                 return;
1168         /* Recalculate the new open mode in case someone reopened the file
1169          * while we were waiting in line to be scheduled.
1170          */
1171         spin_lock(&state->owner->so_lock);
1172         spin_lock(&calldata->inode->i_lock);
1173         mode = old_mode = state->state;
1174         if (state->n_rdwr == 0) {
1175                 if (state->n_rdonly == 0)
1176                         mode &= ~FMODE_READ;
1177                 if (state->n_wronly == 0)
1178                         mode &= ~FMODE_WRITE;
1179         }
1180         nfs4_state_set_mode_locked(state, mode);
1181         spin_unlock(&calldata->inode->i_lock);
1182         spin_unlock(&state->owner->so_lock);
1183         if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1184                 /* Note: exit _without_ calling nfs4_close_done */
1185                 task->tk_action = NULL;
1186                 return;
1187         }
1188         nfs_fattr_init(calldata->res.fattr);
1189         if (mode != 0)
1190                 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1191         calldata->arg.open_flags = mode;
1192         calldata->timestamp = jiffies;
1193         rpc_call_setup(task, &msg, 0);
1194 }
1195
1196 static const struct rpc_call_ops nfs4_close_ops = {
1197         .rpc_call_prepare = nfs4_close_prepare,
1198         .rpc_call_done = nfs4_close_done,
1199         .rpc_release = nfs4_free_closedata,
1200 };
1201
1202 /*
1203  * It is possible for data to be read/written from a mem-mapped file
1204  * after the sys_close call (which hits the vfs layer as a flush).
1205  * This means that we can't safely call nfsv4 close on a file until
1206  * the inode is cleared. This in turn means that we are not good
1207  * NFSv4 citizens - we do not indicate to the server to update the file's
1208  * share state even when we are done with one of the three share
1209  * stateid's in the inode.
1210  *
1211  * NOTE: Caller must be holding the sp->so_owner semaphore!
1212  */
1213 int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1214 {
1215         struct nfs_server *server = NFS_SERVER(inode);
1216         struct nfs4_closedata *calldata;
1217         int status = -ENOMEM;
1218
1219         calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1220         if (calldata == NULL)
1221                 goto out;
1222         calldata->inode = inode;
1223         calldata->state = state;
1224         calldata->arg.fh = NFS_FH(inode);
1225         calldata->arg.stateid = &state->stateid;
1226         /* Serialization for the sequence id */
1227         calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1228         if (calldata->arg.seqid == NULL)
1229                 goto out_free_calldata;
1230         calldata->arg.bitmask = server->attr_bitmask;
1231         calldata->res.fattr = &calldata->fattr;
1232         calldata->res.server = server;
1233
1234         status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
1235         if (status == 0)
1236                 goto out;
1237
1238         nfs_free_seqid(calldata->arg.seqid);
1239 out_free_calldata:
1240         kfree(calldata);
1241 out:
1242         return status;
1243 }
1244
1245 static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1246 {
1247         struct file *filp;
1248
1249         filp = lookup_instantiate_filp(nd, dentry, NULL);
1250         if (!IS_ERR(filp)) {
1251                 struct nfs_open_context *ctx;
1252                 ctx = (struct nfs_open_context *)filp->private_data;
1253                 ctx->state = state;
1254                 return 0;
1255         }
1256         nfs4_close_state(state, nd->intent.open.flags);
1257         return PTR_ERR(filp);
1258 }
1259
1260 struct dentry *
1261 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1262 {
1263         struct iattr attr;
1264         struct rpc_cred *cred;
1265         struct nfs4_state *state;
1266         struct dentry *res;
1267
1268         if (nd->flags & LOOKUP_CREATE) {
1269                 attr.ia_mode = nd->intent.open.create_mode;
1270                 attr.ia_valid = ATTR_MODE;
1271                 if (!IS_POSIXACL(dir))
1272                         attr.ia_mode &= ~current->fs->umask;
1273         } else {
1274                 attr.ia_valid = 0;
1275                 BUG_ON(nd->intent.open.flags & O_CREAT);
1276         }
1277
1278         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1279         if (IS_ERR(cred))
1280                 return (struct dentry *)cred;
1281         state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1282         put_rpccred(cred);
1283         if (IS_ERR(state)) {
1284                 if (PTR_ERR(state) == -ENOENT)
1285                         d_add(dentry, NULL);
1286                 return (struct dentry *)state;
1287         }
1288         res = d_add_unique(dentry, igrab(state->inode));
1289         if (res != NULL)
1290                 dentry = res;
1291         nfs4_intent_set_file(nd, dentry, state);
1292         return res;
1293 }
1294
1295 int
1296 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1297 {
1298         struct rpc_cred *cred;
1299         struct nfs4_state *state;
1300
1301         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1302         if (IS_ERR(cred))
1303                 return PTR_ERR(cred);
1304         state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1305         if (IS_ERR(state))
1306                 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1307         put_rpccred(cred);
1308         if (IS_ERR(state)) {
1309                 switch (PTR_ERR(state)) {
1310                         case -EPERM:
1311                         case -EACCES:
1312                         case -EDQUOT:
1313                         case -ENOSPC:
1314                         case -EROFS:
1315                                 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1316                                 return 1;
1317                         default:
1318                                 goto out_drop;
1319                 }
1320         }
1321         if (state->inode == dentry->d_inode) {
1322                 nfs4_intent_set_file(nd, dentry, state);
1323                 return 1;
1324         }
1325         nfs4_close_state(state, openflags);
1326 out_drop:
1327         d_drop(dentry);
1328         return 0;
1329 }
1330
1331
1332 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1333 {
1334         struct nfs4_server_caps_res res = {};
1335         struct rpc_message msg = {
1336                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1337                 .rpc_argp = fhandle,
1338                 .rpc_resp = &res,
1339         };
1340         int status;
1341
1342         status = rpc_call_sync(server->client, &msg, 0);
1343         if (status == 0) {
1344                 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1345                 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1346                         server->caps |= NFS_CAP_ACLS;
1347                 if (res.has_links != 0)
1348                         server->caps |= NFS_CAP_HARDLINKS;
1349                 if (res.has_symlinks != 0)
1350                         server->caps |= NFS_CAP_SYMLINKS;
1351                 server->acl_bitmask = res.acl_bitmask;
1352         }
1353         return status;
1354 }
1355
1356 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1357 {
1358         struct nfs4_exception exception = { };
1359         int err;
1360         do {
1361                 err = nfs4_handle_exception(server,
1362                                 _nfs4_server_capabilities(server, fhandle),
1363                                 &exception);
1364         } while (exception.retry);
1365         return err;
1366 }
1367
1368 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1369                 struct nfs_fsinfo *info)
1370 {
1371         struct nfs4_lookup_root_arg args = {
1372                 .bitmask = nfs4_fattr_bitmap,
1373         };
1374         struct nfs4_lookup_res res = {
1375                 .server = server,
1376                 .fattr = info->fattr,
1377                 .fh = fhandle,
1378         };
1379         struct rpc_message msg = {
1380                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1381                 .rpc_argp = &args,
1382                 .rpc_resp = &res,
1383         };
1384         nfs_fattr_init(info->fattr);
1385         return rpc_call_sync(server->client, &msg, 0);
1386 }
1387
1388 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1389                 struct nfs_fsinfo *info)
1390 {
1391         struct nfs4_exception exception = { };
1392         int err;
1393         do {
1394                 err = nfs4_handle_exception(server,
1395                                 _nfs4_lookup_root(server, fhandle, info),
1396                                 &exception);
1397         } while (exception.retry);
1398         return err;
1399 }
1400
1401 /*
1402  * get the file handle for the "/" directory on the server
1403  */
1404 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1405                               struct nfs_fsinfo *info)
1406 {
1407         int status;
1408
1409         status = nfs4_lookup_root(server, fhandle, info);
1410         if (status == 0)
1411                 status = nfs4_server_capabilities(server, fhandle);
1412         if (status == 0)
1413                 status = nfs4_do_fsinfo(server, fhandle, info);
1414         return nfs4_map_errors(status);
1415 }
1416
1417 /*
1418  * Get locations and (maybe) other attributes of a referral.
1419  * Note that we'll actually follow the referral later when
1420  * we detect fsid mismatch in inode revalidation
1421  */
1422 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1423 {
1424         int status = -ENOMEM;
1425         struct page *page = NULL;
1426         struct nfs4_fs_locations *locations = NULL;
1427
1428         page = alloc_page(GFP_KERNEL);
1429         if (page == NULL)
1430                 goto out;
1431         locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1432         if (locations == NULL)
1433                 goto out;
1434
1435         status = nfs4_proc_fs_locations(dir, name, locations, page);
1436         if (status != 0)
1437                 goto out;
1438         /* Make sure server returned a different fsid for the referral */
1439         if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1440                 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1441                 status = -EIO;
1442                 goto out;
1443         }
1444
1445         memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1446         fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1447         if (!fattr->mode)
1448                 fattr->mode = S_IFDIR;
1449         memset(fhandle, 0, sizeof(struct nfs_fh));
1450 out:
1451         if (page)
1452                 __free_page(page);
1453         if (locations)
1454                 kfree(locations);
1455         return status;
1456 }
1457
1458 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1459 {
1460         struct nfs4_getattr_arg args = {
1461                 .fh = fhandle,
1462                 .bitmask = server->attr_bitmask,
1463         };
1464         struct nfs4_getattr_res res = {
1465                 .fattr = fattr,
1466                 .server = server,
1467         };
1468         struct rpc_message msg = {
1469                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1470                 .rpc_argp = &args,
1471                 .rpc_resp = &res,
1472         };
1473
1474         nfs_fattr_init(fattr);
1475         return rpc_call_sync(server->client, &msg, 0);
1476 }
1477
1478 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1479 {
1480         struct nfs4_exception exception = { };
1481         int err;
1482         do {
1483                 err = nfs4_handle_exception(server,
1484                                 _nfs4_proc_getattr(server, fhandle, fattr),
1485                                 &exception);
1486         } while (exception.retry);
1487         return err;
1488 }
1489
1490 /*
1491  * The file is not closed if it is opened due to the a request to change
1492  * the size of the file. The open call will not be needed once the
1493  * VFS layer lookup-intents are implemented.
1494  *
1495  * Close is called when the inode is destroyed.
1496  * If we haven't opened the file for O_WRONLY, we
1497  * need to in the size_change case to obtain a stateid.
1498  *
1499  * Got race?
1500  * Because OPEN is always done by name in nfsv4, it is
1501  * possible that we opened a different file by the same
1502  * name.  We can recognize this race condition, but we
1503  * can't do anything about it besides returning an error.
1504  *
1505  * This will be fixed with VFS changes (lookup-intent).
1506  */
1507 static int
1508 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1509                   struct iattr *sattr)
1510 {
1511         struct rpc_cred *cred;
1512         struct inode *inode = dentry->d_inode;
1513         struct nfs_open_context *ctx;
1514         struct nfs4_state *state = NULL;
1515         int status;
1516
1517         nfs_fattr_init(fattr);
1518
1519         cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1520         if (IS_ERR(cred))
1521                 return PTR_ERR(cred);
1522
1523         /* Search for an existing open(O_WRITE) file */
1524         ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1525         if (ctx != NULL)
1526                 state = ctx->state;
1527
1528         status = nfs4_do_setattr(inode, fattr, sattr, state);
1529         if (status == 0)
1530                 nfs_setattr_update_inode(inode, sattr);
1531         if (ctx != NULL)
1532                 put_nfs_open_context(ctx);
1533         put_rpccred(cred);
1534         return status;
1535 }
1536
1537 static int _nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1538                 struct qstr *name, struct nfs_fh *fhandle,
1539                 struct nfs_fattr *fattr)
1540 {
1541         int                    status;
1542         struct nfs4_lookup_arg args = {
1543                 .bitmask = server->attr_bitmask,
1544                 .dir_fh = dirfh,
1545                 .name = name,
1546         };
1547         struct nfs4_lookup_res res = {
1548                 .server = server,
1549                 .fattr = fattr,
1550                 .fh = fhandle,
1551         };
1552         struct rpc_message msg = {
1553                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1554                 .rpc_argp = &args,
1555                 .rpc_resp = &res,
1556         };
1557
1558         nfs_fattr_init(fattr);
1559
1560         dprintk("NFS call  lookupfh %s\n", name->name);
1561         status = rpc_call_sync(server->client, &msg, 0);
1562         dprintk("NFS reply lookupfh: %d\n", status);
1563         if (status == -NFS4ERR_MOVED)
1564                 status = -EREMOTE;
1565         return status;
1566 }
1567
1568 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1569                               struct qstr *name, struct nfs_fh *fhandle,
1570                               struct nfs_fattr *fattr)
1571 {
1572         struct nfs4_exception exception = { };
1573         int err;
1574         do {
1575                 err = nfs4_handle_exception(server,
1576                                 _nfs4_proc_lookupfh(server, dirfh, name,
1577                                                     fhandle, fattr),
1578                                 &exception);
1579         } while (exception.retry);
1580         return err;
1581 }
1582
1583 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1584                 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1585 {
1586         int                    status;
1587         struct nfs_server *server = NFS_SERVER(dir);
1588         struct nfs4_lookup_arg args = {
1589                 .bitmask = server->attr_bitmask,
1590                 .dir_fh = NFS_FH(dir),
1591                 .name = name,
1592         };
1593         struct nfs4_lookup_res res = {
1594                 .server = server,
1595                 .fattr = fattr,
1596                 .fh = fhandle,
1597         };
1598         struct rpc_message msg = {
1599                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1600                 .rpc_argp = &args,
1601                 .rpc_resp = &res,
1602         };
1603
1604         nfs_fattr_init(fattr);
1605
1606         dprintk("NFS call  lookup %s\n", name->name);
1607         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1608         if (status == -NFS4ERR_MOVED)
1609                 status = nfs4_get_referral(dir, name, fattr, fhandle);
1610         dprintk("NFS reply lookup: %d\n", status);
1611         return status;
1612 }
1613
1614 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1615 {
1616         struct nfs4_exception exception = { };
1617         int err;
1618         do {
1619                 err = nfs4_handle_exception(NFS_SERVER(dir),
1620                                 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1621                                 &exception);
1622         } while (exception.retry);
1623         return err;
1624 }
1625
1626 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1627 {
1628         struct nfs4_accessargs args = {
1629                 .fh = NFS_FH(inode),
1630         };
1631         struct nfs4_accessres res = { 0 };
1632         struct rpc_message msg = {
1633                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1634                 .rpc_argp = &args,
1635                 .rpc_resp = &res,
1636                 .rpc_cred = entry->cred,
1637         };
1638         int mode = entry->mask;
1639         int status;
1640
1641         /*
1642          * Determine which access bits we want to ask for...
1643          */
1644         if (mode & MAY_READ)
1645                 args.access |= NFS4_ACCESS_READ;
1646         if (S_ISDIR(inode->i_mode)) {
1647                 if (mode & MAY_WRITE)
1648                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1649                 if (mode & MAY_EXEC)
1650                         args.access |= NFS4_ACCESS_LOOKUP;
1651         } else {
1652                 if (mode & MAY_WRITE)
1653                         args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1654                 if (mode & MAY_EXEC)
1655                         args.access |= NFS4_ACCESS_EXECUTE;
1656         }
1657         status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1658         if (!status) {
1659                 entry->mask = 0;
1660                 if (res.access & NFS4_ACCESS_READ)
1661                         entry->mask |= MAY_READ;
1662                 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1663                         entry->mask |= MAY_WRITE;
1664                 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1665                         entry->mask |= MAY_EXEC;
1666         }
1667         return status;
1668 }
1669
1670 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1671 {
1672         struct nfs4_exception exception = { };
1673         int err;
1674         do {
1675                 err = nfs4_handle_exception(NFS_SERVER(inode),
1676                                 _nfs4_proc_access(inode, entry),
1677                                 &exception);
1678         } while (exception.retry);
1679         return err;
1680 }
1681
1682 /*
1683  * TODO: For the time being, we don't try to get any attributes
1684  * along with any of the zero-copy operations READ, READDIR,
1685  * READLINK, WRITE.
1686  *
1687  * In the case of the first three, we want to put the GETATTR
1688  * after the read-type operation -- this is because it is hard
1689  * to predict the length of a GETATTR response in v4, and thus
1690  * align the READ data correctly.  This means that the GETATTR
1691  * may end up partially falling into the page cache, and we should
1692  * shift it into the 'tail' of the xdr_buf before processing.
1693  * To do this efficiently, we need to know the total length
1694  * of data received, which doesn't seem to be available outside
1695  * of the RPC layer.
1696  *
1697  * In the case of WRITE, we also want to put the GETATTR after
1698  * the operation -- in this case because we want to make sure
1699  * we get the post-operation mtime and size.  This means that
1700  * we can't use xdr_encode_pages() as written: we need a variant
1701  * of it which would leave room in the 'tail' iovec.
1702  *
1703  * Both of these changes to the XDR layer would in fact be quite
1704  * minor, but I decided to leave them for a subsequent patch.
1705  */
1706 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1707                 unsigned int pgbase, unsigned int pglen)
1708 {
1709         struct nfs4_readlink args = {
1710                 .fh       = NFS_FH(inode),
1711                 .pgbase   = pgbase,
1712                 .pglen    = pglen,
1713                 .pages    = &page,
1714         };
1715         struct rpc_message msg = {
1716                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1717                 .rpc_argp = &args,
1718                 .rpc_resp = NULL,
1719         };
1720
1721         return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1722 }
1723
1724 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1725                 unsigned int pgbase, unsigned int pglen)
1726 {
1727         struct nfs4_exception exception = { };
1728         int err;
1729         do {
1730                 err = nfs4_handle_exception(NFS_SERVER(inode),
1731                                 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1732                                 &exception);
1733         } while (exception.retry);
1734         return err;
1735 }
1736
1737 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1738 {
1739         int flags = rdata->flags;
1740         struct inode *inode = rdata->inode;
1741         struct nfs_fattr *fattr = rdata->res.fattr;
1742         struct nfs_server *server = NFS_SERVER(inode);
1743         struct rpc_message msg = {
1744                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_READ],
1745                 .rpc_argp       = &rdata->args,
1746                 .rpc_resp       = &rdata->res,
1747                 .rpc_cred       = rdata->cred,
1748         };
1749         unsigned long timestamp = jiffies;
1750         int status;
1751
1752         dprintk("NFS call  read %d @ %Ld\n", rdata->args.count,
1753                         (long long) rdata->args.offset);
1754
1755         nfs_fattr_init(fattr);
1756         status = rpc_call_sync(server->client, &msg, flags);
1757         if (!status)
1758                 renew_lease(server, timestamp);
1759         dprintk("NFS reply read: %d\n", status);
1760         return status;
1761 }
1762
1763 static int nfs4_proc_read(struct nfs_read_data *rdata)
1764 {
1765         struct nfs4_exception exception = { };
1766         int err;
1767         do {
1768                 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1769                                 _nfs4_proc_read(rdata),
1770                                 &exception);
1771         } while (exception.retry);
1772         return err;
1773 }
1774
1775 /*
1776  * Got race?
1777  * We will need to arrange for the VFS layer to provide an atomic open.
1778  * Until then, this create/open method is prone to inefficiency and race
1779  * conditions due to the lookup, create, and open VFS calls from sys_open()
1780  * placed on the wire.
1781  *
1782  * Given the above sorry state of affairs, I'm simply sending an OPEN.
1783  * The file will be opened again in the subsequent VFS open call
1784  * (nfs4_proc_file_open).
1785  *
1786  * The open for read will just hang around to be used by any process that
1787  * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1788  */
1789
1790 static int
1791 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1792                  int flags, struct nameidata *nd)
1793 {
1794         struct nfs4_state *state;
1795         struct rpc_cred *cred;
1796         int status = 0;
1797
1798         cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1799         if (IS_ERR(cred)) {
1800                 status = PTR_ERR(cred);
1801                 goto out;
1802         }
1803         state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1804         put_rpccred(cred);
1805         if (IS_ERR(state)) {
1806                 status = PTR_ERR(state);
1807                 goto out;
1808         }
1809         d_instantiate(dentry, igrab(state->inode));
1810         if (flags & O_EXCL) {
1811                 struct nfs_fattr fattr;
1812                 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1813                 if (status == 0)
1814                         nfs_setattr_update_inode(state->inode, sattr);
1815         }
1816         if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1817                 status = nfs4_intent_set_file(nd, dentry, state);
1818         else
1819                 nfs4_close_state(state, flags);
1820 out:
1821         return status;
1822 }
1823
1824 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1825 {
1826         struct nfs_server *server = NFS_SERVER(dir);
1827         struct nfs4_remove_arg args = {
1828                 .fh = NFS_FH(dir),
1829                 .name = name,
1830                 .bitmask = server->attr_bitmask,
1831         };
1832         struct nfs_fattr dir_attr;
1833         struct nfs4_remove_res  res = {
1834                 .server = server,
1835                 .dir_attr = &dir_attr,
1836         };
1837         struct rpc_message msg = {
1838                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1839                 .rpc_argp       = &args,
1840                 .rpc_resp       = &res,
1841         };
1842         int                     status;
1843
1844         nfs_fattr_init(res.dir_attr);
1845         status = rpc_call_sync(server->client, &msg, 0);
1846         if (status == 0) {
1847                 update_changeattr(dir, &res.cinfo);
1848                 nfs_post_op_update_inode(dir, res.dir_attr);
1849         }
1850         return status;
1851 }
1852
1853 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1854 {
1855         struct nfs4_exception exception = { };
1856         int err;
1857         do {
1858                 err = nfs4_handle_exception(NFS_SERVER(dir),
1859                                 _nfs4_proc_remove(dir, name),
1860                                 &exception);
1861         } while (exception.retry);
1862         return err;
1863 }
1864
1865 struct unlink_desc {
1866         struct nfs4_remove_arg  args;
1867         struct nfs4_remove_res  res;
1868         struct nfs_fattr dir_attr;
1869 };
1870
1871 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1872                 struct qstr *name)
1873 {
1874         struct nfs_server *server = NFS_SERVER(dir->d_inode);
1875         struct unlink_desc *up;
1876
1877         up = kmalloc(sizeof(*up), GFP_KERNEL);
1878         if (!up)
1879                 return -ENOMEM;
1880
1881         up->args.fh = NFS_FH(dir->d_inode);
1882         up->args.name = name;
1883         up->args.bitmask = server->attr_bitmask;
1884         up->res.server = server;
1885         up->res.dir_attr = &up->dir_attr;
1886
1887         msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1888         msg->rpc_argp = &up->args;
1889         msg->rpc_resp = &up->res;
1890         return 0;
1891 }
1892
1893 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1894 {
1895         struct rpc_message *msg = &task->tk_msg;
1896         struct unlink_desc *up;
1897
1898         if (msg->rpc_resp != NULL) {
1899                 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1900                 update_changeattr(dir->d_inode, &up->res.cinfo);
1901                 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1902                 kfree(up);
1903                 msg->rpc_resp = NULL;
1904                 msg->rpc_argp = NULL;
1905         }
1906         return 0;
1907 }
1908
1909 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1910                 struct inode *new_dir, struct qstr *new_name)
1911 {
1912         struct nfs_server *server = NFS_SERVER(old_dir);
1913         struct nfs4_rename_arg arg = {
1914                 .old_dir = NFS_FH(old_dir),
1915                 .new_dir = NFS_FH(new_dir),
1916                 .old_name = old_name,
1917                 .new_name = new_name,
1918                 .bitmask = server->attr_bitmask,
1919         };
1920         struct nfs_fattr old_fattr, new_fattr;
1921         struct nfs4_rename_res res = {
1922                 .server = server,
1923                 .old_fattr = &old_fattr,
1924                 .new_fattr = &new_fattr,
1925         };
1926         struct rpc_message msg = {
1927                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1928                 .rpc_argp = &arg,
1929                 .rpc_resp = &res,
1930         };
1931         int                     status;
1932
1933         nfs_fattr_init(res.old_fattr);
1934         nfs_fattr_init(res.new_fattr);
1935         status = rpc_call_sync(server->client, &msg, 0);
1936
1937         if (!status) {
1938                 update_changeattr(old_dir, &res.old_cinfo);
1939                 nfs_post_op_update_inode(old_dir, res.old_fattr);
1940                 update_changeattr(new_dir, &res.new_cinfo);
1941                 nfs_post_op_update_inode(new_dir, res.new_fattr);
1942         }
1943         return status;
1944 }
1945
1946 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1947                 struct inode *new_dir, struct qstr *new_name)
1948 {
1949         struct nfs4_exception exception = { };
1950         int err;
1951         do {
1952                 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1953                                 _nfs4_proc_rename(old_dir, old_name,
1954                                         new_dir, new_name),
1955                                 &exception);
1956         } while (exception.retry);
1957         return err;
1958 }
1959
1960 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1961 {
1962         struct nfs_server *server = NFS_SERVER(inode);
1963         struct nfs4_link_arg arg = {
1964                 .fh     = NFS_FH(inode),
1965                 .dir_fh = NFS_FH(dir),
1966                 .name   = name,
1967                 .bitmask = server->attr_bitmask,
1968         };
1969         struct nfs_fattr fattr, dir_attr;
1970         struct nfs4_link_res res = {
1971                 .server = server,
1972                 .fattr = &fattr,
1973                 .dir_attr = &dir_attr,
1974         };
1975         struct rpc_message msg = {
1976                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1977                 .rpc_argp = &arg,
1978                 .rpc_resp = &res,
1979         };
1980         int                     status;
1981
1982         nfs_fattr_init(res.fattr);
1983         nfs_fattr_init(res.dir_attr);
1984         status = rpc_call_sync(server->client, &msg, 0);
1985         if (!status) {
1986                 update_changeattr(dir, &res.cinfo);
1987                 nfs_post_op_update_inode(dir, res.dir_attr);
1988                 nfs_post_op_update_inode(inode, res.fattr);
1989         }
1990
1991         return status;
1992 }
1993
1994 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1995 {
1996         struct nfs4_exception exception = { };
1997         int err;
1998         do {
1999                 err = nfs4_handle_exception(NFS_SERVER(inode),
2000                                 _nfs4_proc_link(inode, dir, name),
2001                                 &exception);
2002         } while (exception.retry);
2003         return err;
2004 }
2005
2006 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2007                 struct page *page, unsigned int len, struct iattr *sattr)
2008 {
2009         struct nfs_server *server = NFS_SERVER(dir);
2010         struct nfs_fh fhandle;
2011         struct nfs_fattr fattr, dir_fattr;
2012         struct nfs4_create_arg arg = {
2013                 .dir_fh = NFS_FH(dir),
2014                 .server = server,
2015                 .name = &dentry->d_name,
2016                 .attrs = sattr,
2017                 .ftype = NF4LNK,
2018                 .bitmask = server->attr_bitmask,
2019         };
2020         struct nfs4_create_res res = {
2021                 .server = server,
2022                 .fh = &fhandle,
2023                 .fattr = &fattr,
2024                 .dir_fattr = &dir_fattr,
2025         };
2026         struct rpc_message msg = {
2027                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2028                 .rpc_argp = &arg,
2029                 .rpc_resp = &res,
2030         };
2031         int                     status;
2032
2033         if (len > NFS4_MAXPATHLEN)
2034                 return -ENAMETOOLONG;
2035
2036         arg.u.symlink.pages = &page;
2037         arg.u.symlink.len = len;
2038         nfs_fattr_init(&fattr);
2039         nfs_fattr_init(&dir_fattr);
2040
2041         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2042         if (!status) {
2043                 update_changeattr(dir, &res.dir_cinfo);
2044                 nfs_post_op_update_inode(dir, res.dir_fattr);
2045                 status = nfs_instantiate(dentry, &fhandle, &fattr);
2046         }
2047         return status;
2048 }
2049
2050 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2051                 struct page *page, unsigned int len, struct iattr *sattr)
2052 {
2053         struct nfs4_exception exception = { };
2054         int err;
2055         do {
2056                 err = nfs4_handle_exception(NFS_SERVER(dir),
2057                                 _nfs4_proc_symlink(dir, dentry, page,
2058                                                         len, sattr),
2059                                 &exception);
2060         } while (exception.retry);
2061         return err;
2062 }
2063
2064 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2065                 struct iattr *sattr)
2066 {
2067         struct nfs_server *server = NFS_SERVER(dir);
2068         struct nfs_fh fhandle;
2069         struct nfs_fattr fattr, dir_fattr;
2070         struct nfs4_create_arg arg = {
2071                 .dir_fh = NFS_FH(dir),
2072                 .server = server,
2073                 .name = &dentry->d_name,
2074                 .attrs = sattr,
2075                 .ftype = NF4DIR,
2076                 .bitmask = server->attr_bitmask,
2077         };
2078         struct nfs4_create_res res = {
2079                 .server = server,
2080                 .fh = &fhandle,
2081                 .fattr = &fattr,
2082                 .dir_fattr = &dir_fattr,
2083         };
2084         struct rpc_message msg = {
2085                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2086                 .rpc_argp = &arg,
2087                 .rpc_resp = &res,
2088         };
2089         int                     status;
2090
2091         nfs_fattr_init(&fattr);
2092         nfs_fattr_init(&dir_fattr);
2093
2094         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2095         if (!status) {
2096                 update_changeattr(dir, &res.dir_cinfo);
2097                 nfs_post_op_update_inode(dir, res.dir_fattr);
2098                 status = nfs_instantiate(dentry, &fhandle, &fattr);
2099         }
2100         return status;
2101 }
2102
2103 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2104                 struct iattr *sattr)
2105 {
2106         struct nfs4_exception exception = { };
2107         int err;
2108         do {
2109                 err = nfs4_handle_exception(NFS_SERVER(dir),
2110                                 _nfs4_proc_mkdir(dir, dentry, sattr),
2111                                 &exception);
2112         } while (exception.retry);
2113         return err;
2114 }
2115
2116 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2117                   u64 cookie, struct page *page, unsigned int count, int plus)
2118 {
2119         struct inode            *dir = dentry->d_inode;
2120         struct nfs4_readdir_arg args = {
2121                 .fh = NFS_FH(dir),
2122                 .pages = &page,
2123                 .pgbase = 0,
2124                 .count = count,
2125                 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2126         };
2127         struct nfs4_readdir_res res;
2128         struct rpc_message msg = {
2129                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2130                 .rpc_argp = &args,
2131                 .rpc_resp = &res,
2132                 .rpc_cred = cred,
2133         };
2134         int                     status;
2135
2136         dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2137                         dentry->d_parent->d_name.name,
2138                         dentry->d_name.name,
2139                         (unsigned long long)cookie);
2140         nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2141         res.pgbase = args.pgbase;
2142         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2143         if (status == 0)
2144                 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2145         dprintk("%s: returns %d\n", __FUNCTION__, status);
2146         return status;
2147 }
2148
2149 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2150                   u64 cookie, struct page *page, unsigned int count, int plus)
2151 {
2152         struct nfs4_exception exception = { };
2153         int err;
2154         do {
2155                 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2156                                 _nfs4_proc_readdir(dentry, cred, cookie,
2157                                         page, count, plus),
2158                                 &exception);
2159         } while (exception.retry);
2160         return err;
2161 }
2162
2163 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2164                 struct iattr *sattr, dev_t rdev)
2165 {
2166         struct nfs_server *server = NFS_SERVER(dir);
2167         struct nfs_fh fh;
2168         struct nfs_fattr fattr, dir_fattr;
2169         struct nfs4_create_arg arg = {
2170                 .dir_fh = NFS_FH(dir),
2171                 .server = server,
2172                 .name = &dentry->d_name,
2173                 .attrs = sattr,
2174                 .bitmask = server->attr_bitmask,
2175         };
2176         struct nfs4_create_res res = {
2177                 .server = server,
2178                 .fh = &fh,
2179                 .fattr = &fattr,
2180                 .dir_fattr = &dir_fattr,
2181         };
2182         struct rpc_message msg = {
2183                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2184                 .rpc_argp = &arg,
2185                 .rpc_resp = &res,
2186         };
2187         int                     status;
2188         int                     mode = sattr->ia_mode;
2189
2190         nfs_fattr_init(&fattr);
2191         nfs_fattr_init(&dir_fattr);
2192
2193         BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2194         BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2195         if (S_ISFIFO(mode))
2196                 arg.ftype = NF4FIFO;
2197         else if (S_ISBLK(mode)) {
2198                 arg.ftype = NF4BLK;
2199                 arg.u.device.specdata1 = MAJOR(rdev);
2200                 arg.u.device.specdata2 = MINOR(rdev);
2201         }
2202         else if (S_ISCHR(mode)) {
2203                 arg.ftype = NF4CHR;
2204                 arg.u.device.specdata1 = MAJOR(rdev);
2205                 arg.u.device.specdata2 = MINOR(rdev);
2206         }
2207         else
2208                 arg.ftype = NF4SOCK;
2209
2210         status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2211         if (status == 0) {
2212                 update_changeattr(dir, &res.dir_cinfo);
2213                 nfs_post_op_update_inode(dir, res.dir_fattr);
2214                 status = nfs_instantiate(dentry, &fh, &fattr);
2215         }
2216         return status;
2217 }
2218
2219 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2220                 struct iattr *sattr, dev_t rdev)
2221 {
2222         struct nfs4_exception exception = { };
2223         int err;
2224         do {
2225                 err = nfs4_handle_exception(NFS_SERVER(dir),
2226                                 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2227                                 &exception);
2228         } while (exception.retry);
2229         return err;
2230 }
2231
2232 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2233                  struct nfs_fsstat *fsstat)
2234 {
2235         struct nfs4_statfs_arg args = {
2236                 .fh = fhandle,
2237                 .bitmask = server->attr_bitmask,
2238         };
2239         struct rpc_message msg = {
2240                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2241                 .rpc_argp = &args,
2242                 .rpc_resp = fsstat,
2243         };
2244
2245         nfs_fattr_init(fsstat->fattr);
2246         return rpc_call_sync(server->client, &msg, 0);
2247 }
2248
2249 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2250 {
2251         struct nfs4_exception exception = { };
2252         int err;
2253         do {
2254                 err = nfs4_handle_exception(server,
2255                                 _nfs4_proc_statfs(server, fhandle, fsstat),
2256                                 &exception);
2257         } while (exception.retry);
2258         return err;
2259 }
2260
2261 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2262                 struct nfs_fsinfo *fsinfo)
2263 {
2264         struct nfs4_fsinfo_arg args = {
2265                 .fh = fhandle,
2266                 .bitmask = server->attr_bitmask,
2267         };
2268         struct rpc_message msg = {
2269                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2270                 .rpc_argp = &args,
2271                 .rpc_resp = fsinfo,
2272         };
2273
2274         return rpc_call_sync(server->client, &msg, 0);
2275 }
2276
2277 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2278 {
2279         struct nfs4_exception exception = { };
2280         int err;
2281
2282         do {
2283                 err = nfs4_handle_exception(server,
2284                                 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2285                                 &exception);
2286         } while (exception.retry);
2287         return err;
2288 }
2289
2290 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2291 {
2292         nfs_fattr_init(fsinfo->fattr);
2293         return nfs4_do_fsinfo(server, fhandle, fsinfo);
2294 }
2295
2296 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2297                 struct nfs_pathconf *pathconf)
2298 {
2299         struct nfs4_pathconf_arg args = {
2300                 .fh = fhandle,
2301                 .bitmask = server->attr_bitmask,
2302         };
2303         struct rpc_message msg = {
2304                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2305                 .rpc_argp = &args,
2306                 .rpc_resp = pathconf,
2307         };
2308
2309         /* None of the pathconf attributes are mandatory to implement */
2310         if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2311                 memset(pathconf, 0, sizeof(*pathconf));
2312                 return 0;
2313         }
2314
2315         nfs_fattr_init(pathconf->fattr);
2316         return rpc_call_sync(server->client, &msg, 0);
2317 }
2318
2319 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2320                 struct nfs_pathconf *pathconf)
2321 {
2322         struct nfs4_exception exception = { };
2323         int err;
2324
2325         do {
2326                 err = nfs4_handle_exception(server,
2327                                 _nfs4_proc_pathconf(server, fhandle, pathconf),
2328                                 &exception);
2329         } while (exception.retry);
2330         return err;
2331 }
2332
2333 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2334 {
2335         struct nfs_server *server = NFS_SERVER(data->inode);
2336
2337         if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2338                 rpc_restart_call(task);
2339                 return -EAGAIN;
2340         }
2341         if (task->tk_status > 0)
2342                 renew_lease(server, data->timestamp);
2343         return 0;
2344 }
2345
2346 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2347 {
2348         struct rpc_message msg = {
2349                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2350                 .rpc_argp = &data->args,
2351                 .rpc_resp = &data->res,
2352                 .rpc_cred = data->cred,
2353         };
2354
2355         data->timestamp   = jiffies;
2356
2357         rpc_call_setup(&data->task, &msg, 0);
2358 }
2359
2360 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2361 {
2362         struct inode *inode = data->inode;
2363
2364         if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2365                 rpc_restart_call(task);
2366                 return -EAGAIN;
2367         }
2368         if (task->tk_status >= 0) {
2369                 renew_lease(NFS_SERVER(inode), data->timestamp);
2370                 nfs_post_op_update_inode(inode, data->res.fattr);
2371         }
2372         return 0;
2373 }
2374
2375 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2376 {
2377         struct rpc_message msg = {
2378                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2379                 .rpc_argp = &data->args,
2380                 .rpc_resp = &data->res,
2381                 .rpc_cred = data->cred,
2382         };
2383         struct inode *inode = data->inode;
2384         struct nfs_server *server = NFS_SERVER(inode);
2385         int stable;
2386
2387         if (how & FLUSH_STABLE) {
2388                 if (!NFS_I(inode)->ncommit)
2389                         stable = NFS_FILE_SYNC;
2390                 else
2391                         stable = NFS_DATA_SYNC;
2392         } else
2393                 stable = NFS_UNSTABLE;
2394         data->args.stable = stable;
2395         data->args.bitmask = server->attr_bitmask;
2396         data->res.server = server;
2397
2398         data->timestamp   = jiffies;
2399
2400         /* Finalize the task. */
2401         rpc_call_setup(&data->task, &msg, 0);
2402 }
2403
2404 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2405 {
2406         struct inode *inode = data->inode;
2407
2408         if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2409                 rpc_restart_call(task);
2410                 return -EAGAIN;
2411         }
2412         if (task->tk_status >= 0)
2413                 nfs_post_op_update_inode(inode, data->res.fattr);
2414         return 0;
2415 }
2416
2417 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2418 {
2419         struct rpc_message msg = {
2420                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2421                 .rpc_argp = &data->args,
2422                 .rpc_resp = &data->res,
2423                 .rpc_cred = data->cred,
2424         };
2425         struct nfs_server *server = NFS_SERVER(data->inode);
2426
2427         data->args.bitmask = server->attr_bitmask;
2428         data->res.server = server;
2429
2430         rpc_call_setup(&data->task, &msg, 0);
2431 }
2432
2433 /*
2434  * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2435  * standalone procedure for queueing an asynchronous RENEW.
2436  */
2437 static void nfs4_renew_done(struct rpc_task *task, void *data)
2438 {
2439         struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2440         unsigned long timestamp = (unsigned long)data;
2441
2442         if (task->tk_status < 0) {
2443                 switch (task->tk_status) {
2444                         case -NFS4ERR_STALE_CLIENTID:
2445                         case -NFS4ERR_EXPIRED:
2446                         case -NFS4ERR_CB_PATH_DOWN:
2447                                 nfs4_schedule_state_recovery(clp);
2448                 }
2449                 return;
2450         }
2451         spin_lock(&clp->cl_lock);
2452         if (time_before(clp->cl_last_renewal,timestamp))
2453                 clp->cl_last_renewal = timestamp;
2454         spin_unlock(&clp->cl_lock);
2455 }
2456
2457 static const struct rpc_call_ops nfs4_renew_ops = {
2458         .rpc_call_done = nfs4_renew_done,
2459 };
2460
2461 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2462 {
2463         struct rpc_message msg = {
2464                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2465                 .rpc_argp       = clp,
2466                 .rpc_cred       = cred,
2467         };
2468
2469         return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2470                         &nfs4_renew_ops, (void *)jiffies);
2471 }
2472
2473 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2474 {
2475         struct rpc_message msg = {
2476                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2477                 .rpc_argp       = clp,
2478                 .rpc_cred       = cred,
2479         };
2480         unsigned long now = jiffies;
2481         int status;
2482
2483         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2484         if (status < 0)
2485                 return status;
2486         spin_lock(&clp->cl_lock);
2487         if (time_before(clp->cl_last_renewal,now))
2488                 clp->cl_last_renewal = now;
2489         spin_unlock(&clp->cl_lock);
2490         return 0;
2491 }
2492
2493 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2494 {
2495         return (server->caps & NFS_CAP_ACLS)
2496                 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2497                 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2498 }
2499
2500 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2501  * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2502  * the stack.
2503  */
2504 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2505
2506 static void buf_to_pages(const void *buf, size_t buflen,
2507                 struct page **pages, unsigned int *pgbase)
2508 {
2509         const void *p = buf;
2510
2511         *pgbase = offset_in_page(buf);
2512         p -= *pgbase;
2513         while (p < buf + buflen) {
2514                 *(pages++) = virt_to_page(p);
2515                 p += PAGE_CACHE_SIZE;
2516         }
2517 }
2518
2519 struct nfs4_cached_acl {
2520         int cached;
2521         size_t len;
2522         char data[0];
2523 };
2524
2525 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2526 {
2527         struct nfs_inode *nfsi = NFS_I(inode);
2528
2529         spin_lock(&inode->i_lock);
2530         kfree(nfsi->nfs4_acl);
2531         nfsi->nfs4_acl = acl;
2532         spin_unlock(&inode->i_lock);
2533 }
2534
2535 static void nfs4_zap_acl_attr(struct inode *inode)
2536 {
2537         nfs4_set_cached_acl(inode, NULL);
2538 }
2539
2540 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2541 {
2542         struct nfs_inode *nfsi = NFS_I(inode);
2543         struct nfs4_cached_acl *acl;
2544         int ret = -ENOENT;
2545
2546         spin_lock(&inode->i_lock);
2547         acl = nfsi->nfs4_acl;
2548         if (acl == NULL)
2549                 goto out;
2550         if (buf == NULL) /* user is just asking for length */
2551                 goto out_len;
2552         if (acl->cached == 0)
2553                 goto out;
2554         ret = -ERANGE; /* see getxattr(2) man page */
2555         if (acl->len > buflen)
2556                 goto out;
2557         memcpy(buf, acl->data, acl->len);
2558 out_len:
2559         ret = acl->len;
2560 out:
2561         spin_unlock(&inode->i_lock);
2562         return ret;
2563 }
2564
2565 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2566 {
2567         struct nfs4_cached_acl *acl;
2568
2569         if (buf && acl_len <= PAGE_SIZE) {
2570                 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2571                 if (acl == NULL)
2572                         goto out;
2573                 acl->cached = 1;
2574                 memcpy(acl->data, buf, acl_len);
2575         } else {
2576                 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2577                 if (acl == NULL)
2578                         goto out;
2579                 acl->cached = 0;
2580         }
2581         acl->len = acl_len;
2582 out:
2583         nfs4_set_cached_acl(inode, acl);
2584 }
2585
2586 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2587 {
2588         struct page *pages[NFS4ACL_MAXPAGES];
2589         struct nfs_getaclargs args = {
2590                 .fh = NFS_FH(inode),
2591                 .acl_pages = pages,
2592                 .acl_len = buflen,
2593         };
2594         size_t resp_len = buflen;
2595         void *resp_buf;
2596         struct rpc_message msg = {
2597                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2598                 .rpc_argp = &args,
2599                 .rpc_resp = &resp_len,
2600         };
2601         struct page *localpage = NULL;
2602         int ret;
2603
2604         if (buflen < PAGE_SIZE) {
2605                 /* As long as we're doing a round trip to the server anyway,
2606                  * let's be prepared for a page of acl data. */
2607                 localpage = alloc_page(GFP_KERNEL);
2608                 resp_buf = page_address(localpage);
2609                 if (localpage == NULL)
2610                         return -ENOMEM;
2611                 args.acl_pages[0] = localpage;
2612                 args.acl_pgbase = 0;
2613                 resp_len = args.acl_len = PAGE_SIZE;
2614         } else {
2615                 resp_buf = buf;
2616                 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2617         }
2618         ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2619         if (ret)
2620                 goto out_free;
2621         if (resp_len > args.acl_len)
2622                 nfs4_write_cached_acl(inode, NULL, resp_len);
2623         else
2624                 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2625         if (buf) {
2626                 ret = -ERANGE;
2627                 if (resp_len > buflen)
2628                         goto out_free;
2629                 if (localpage)
2630                         memcpy(buf, resp_buf, resp_len);
2631         }
2632         ret = resp_len;
2633 out_free:
2634         if (localpage)
2635                 __free_page(localpage);
2636         return ret;
2637 }
2638
2639 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2640 {
2641         struct nfs4_exception exception = { };
2642         ssize_t ret;
2643         do {
2644                 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2645                 if (ret >= 0)
2646                         break;
2647                 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2648         } while (exception.retry);
2649         return ret;
2650 }
2651
2652 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2653 {
2654         struct nfs_server *server = NFS_SERVER(inode);
2655         int ret;
2656
2657         if (!nfs4_server_supports_acls(server))
2658                 return -EOPNOTSUPP;
2659         ret = nfs_revalidate_inode(server, inode);
2660         if (ret < 0)
2661                 return ret;
2662         ret = nfs4_read_cached_acl(inode, buf, buflen);
2663         if (ret != -ENOENT)
2664                 return ret;
2665         return nfs4_get_acl_uncached(inode, buf, buflen);
2666 }
2667
2668 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2669 {
2670         struct nfs_server *server = NFS_SERVER(inode);
2671         struct page *pages[NFS4ACL_MAXPAGES];
2672         struct nfs_setaclargs arg = {
2673                 .fh             = NFS_FH(inode),
2674                 .acl_pages      = pages,
2675                 .acl_len        = buflen,
2676         };
2677         struct rpc_message msg = {
2678                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2679                 .rpc_argp       = &arg,
2680                 .rpc_resp       = NULL,
2681         };
2682         int ret;
2683
2684         if (!nfs4_server_supports_acls(server))
2685                 return -EOPNOTSUPP;
2686         nfs_inode_return_delegation(inode);
2687         buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2688         ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2689         if (ret == 0)
2690                 nfs4_write_cached_acl(inode, buf, buflen);
2691         return ret;
2692 }
2693
2694 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2695 {
2696         struct nfs4_exception exception = { };
2697         int err;
2698         do {
2699                 err = nfs4_handle_exception(NFS_SERVER(inode),
2700                                 __nfs4_proc_set_acl(inode, buf, buflen),
2701                                 &exception);
2702         } while (exception.retry);
2703         return err;
2704 }
2705
2706 static int
2707 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2708 {
2709         struct nfs_client *clp = server->nfs_client;
2710
2711         if (!clp || task->tk_status >= 0)
2712                 return 0;
2713         switch(task->tk_status) {
2714                 case -NFS4ERR_STALE_CLIENTID:
2715                 case -NFS4ERR_STALE_STATEID:
2716                 case -NFS4ERR_EXPIRED:
2717                         rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2718                         nfs4_schedule_state_recovery(clp);
2719                         if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2720                                 rpc_wake_up_task(task);
2721                         task->tk_status = 0;
2722                         return -EAGAIN;
2723                 case -NFS4ERR_DELAY:
2724                         nfs_inc_server_stats((struct nfs_server *) server,
2725                                                 NFSIOS_DELAY);
2726                 case -NFS4ERR_GRACE:
2727                         rpc_delay(task, NFS4_POLL_RETRY_MAX);
2728                         task->tk_status = 0;
2729                         return -EAGAIN;
2730                 case -NFS4ERR_OLD_STATEID:
2731                         task->tk_status = 0;
2732                         return -EAGAIN;
2733         }
2734         task->tk_status = nfs4_map_errors(task->tk_status);
2735         return 0;
2736 }
2737
2738 static int nfs4_wait_bit_interruptible(void *word)
2739 {
2740         if (signal_pending(current))
2741                 return -ERESTARTSYS;
2742         schedule();
2743         return 0;
2744 }
2745
2746 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2747 {
2748         sigset_t oldset;
2749         int res;
2750
2751         might_sleep();
2752
2753         rpc_clnt_sigmask(clnt, &oldset);
2754         res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2755                         nfs4_wait_bit_interruptible,
2756                         TASK_INTERRUPTIBLE);
2757         rpc_clnt_sigunmask(clnt, &oldset);
2758         return res;
2759 }
2760
2761 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2762 {
2763         sigset_t oldset;
2764         int res = 0;
2765
2766         might_sleep();
2767
2768         if (*timeout <= 0)
2769                 *timeout = NFS4_POLL_RETRY_MIN;
2770         if (*timeout > NFS4_POLL_RETRY_MAX)
2771                 *timeout = NFS4_POLL_RETRY_MAX;
2772         rpc_clnt_sigmask(clnt, &oldset);
2773         if (clnt->cl_intr) {
2774                 schedule_timeout_interruptible(*timeout);
2775                 if (signalled())
2776                         res = -ERESTARTSYS;
2777         } else
2778                 schedule_timeout_uninterruptible(*timeout);
2779         rpc_clnt_sigunmask(clnt, &oldset);
2780         *timeout <<= 1;
2781         return res;
2782 }
2783
2784 /* This is the error handling routine for processes that are allowed
2785  * to sleep.
2786  */
2787 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2788 {
2789         struct nfs_client *clp = server->nfs_client;
2790         int ret = errorcode;
2791
2792         exception->retry = 0;
2793         switch(errorcode) {
2794                 case 0:
2795                         return 0;
2796                 case -NFS4ERR_STALE_CLIENTID:
2797                 case -NFS4ERR_STALE_STATEID:
2798                 case -NFS4ERR_EXPIRED:
2799                         nfs4_schedule_state_recovery(clp);
2800                         ret = nfs4_wait_clnt_recover(server->client, clp);
2801                         if (ret == 0)
2802                                 exception->retry = 1;
2803                         break;
2804                 case -NFS4ERR_FILE_OPEN:
2805                 case -NFS4ERR_GRACE:
2806                 case -NFS4ERR_DELAY:
2807                         ret = nfs4_delay(server->client, &exception->timeout);
2808                         if (ret != 0)
2809                                 break;
2810                 case -NFS4ERR_OLD_STATEID:
2811                         exception->retry = 1;
2812         }
2813         /* We failed to handle the error */
2814         return nfs4_map_errors(ret);
2815 }
2816
2817 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2818 {
2819         nfs4_verifier sc_verifier;
2820         struct nfs4_setclientid setclientid = {
2821                 .sc_verifier = &sc_verifier,
2822                 .sc_prog = program,
2823         };
2824         struct rpc_message msg = {
2825                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2826                 .rpc_argp = &setclientid,
2827                 .rpc_resp = clp,
2828                 .rpc_cred = cred,
2829         };
2830         __be32 *p;
2831         int loop = 0;
2832         int status;
2833
2834         p = (__be32*)sc_verifier.data;
2835         *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2836         *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2837
2838         for(;;) {
2839                 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2840                                 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2841                                 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2842                                 cred->cr_ops->cr_name,
2843                                 clp->cl_id_uniquifier);
2844                 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2845                                 sizeof(setclientid.sc_netid), "tcp");
2846                 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2847                                 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2848                                 clp->cl_ipaddr, port >> 8, port & 255);
2849
2850                 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2851                 if (status != -NFS4ERR_CLID_INUSE)
2852                         break;
2853                 if (signalled())
2854                         break;
2855                 if (loop++ & 1)
2856                         ssleep(clp->cl_lease_time + 1);
2857                 else
2858                         if (++clp->cl_id_uniquifier == 0)
2859                                 break;
2860         }
2861         return status;
2862 }
2863
2864 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2865 {
2866         struct nfs_fsinfo fsinfo;
2867         struct rpc_message msg = {
2868                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2869                 .rpc_argp = clp,
2870                 .rpc_resp = &fsinfo,
2871                 .rpc_cred = cred,
2872         };
2873         unsigned long now;
2874         int status;
2875
2876         now = jiffies;
2877         status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2878         if (status == 0) {
2879                 spin_lock(&clp->cl_lock);
2880                 clp->cl_lease_time = fsinfo.lease_time * HZ;
2881                 clp->cl_last_renewal = now;
2882                 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2883                 spin_unlock(&clp->cl_lock);
2884         }
2885         return status;
2886 }
2887
2888 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2889 {
2890         long timeout;
2891         int err;
2892         do {
2893                 err = _nfs4_proc_setclientid_confirm(clp, cred);
2894                 switch (err) {
2895                         case 0:
2896                                 return err;
2897                         case -NFS4ERR_RESOURCE:
2898                                 /* The IBM lawyers misread another document! */
2899                         case -NFS4ERR_DELAY:
2900                                 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2901                 }
2902         } while (err == 0);
2903         return err;
2904 }
2905
2906 struct nfs4_delegreturndata {
2907         struct nfs4_delegreturnargs args;
2908         struct nfs4_delegreturnres res;
2909         struct nfs_fh fh;
2910         nfs4_stateid stateid;
2911         struct rpc_cred *cred;
2912         unsigned long timestamp;
2913         struct nfs_fattr fattr;
2914         int rpc_status;
2915 };
2916
2917 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2918 {
2919         struct nfs4_delegreturndata *data = calldata;
2920         struct rpc_message msg = {
2921                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2922                 .rpc_argp = &data->args,
2923                 .rpc_resp = &data->res,
2924                 .rpc_cred = data->cred,
2925         };
2926         nfs_fattr_init(data->res.fattr);
2927         rpc_call_setup(task, &msg, 0);
2928 }
2929
2930 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2931 {
2932         struct nfs4_delegreturndata *data = calldata;
2933         data->rpc_status = task->tk_status;
2934         if (data->rpc_status == 0)
2935                 renew_lease(data->res.server, data->timestamp);
2936 }
2937
2938 static void nfs4_delegreturn_release(void *calldata)
2939 {
2940         struct nfs4_delegreturndata *data = calldata;
2941
2942         put_rpccred(data->cred);
2943         kfree(calldata);
2944 }
2945
2946 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2947         .rpc_call_prepare = nfs4_delegreturn_prepare,
2948         .rpc_call_done = nfs4_delegreturn_done,
2949         .rpc_release = nfs4_delegreturn_release,
2950 };
2951
2952 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2953 {
2954         struct nfs4_delegreturndata *data;
2955         struct nfs_server *server = NFS_SERVER(inode);
2956         struct rpc_task *task;
2957         int status;
2958
2959         data = kmalloc(sizeof(*data), GFP_KERNEL);
2960         if (data == NULL)
2961                 return -ENOMEM;
2962         data->args.fhandle = &data->fh;
2963         data->args.stateid = &data->stateid;
2964         data->args.bitmask = server->attr_bitmask;
2965         nfs_copy_fh(&data->fh, NFS_FH(inode));
2966         memcpy(&data->stateid, stateid, sizeof(data->stateid));
2967         data->res.fattr = &data->fattr;
2968         data->res.server = server;
2969         data->cred = get_rpccred(cred);
2970         data->timestamp = jiffies;
2971         data->rpc_status = 0;
2972
2973         task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2974         if (IS_ERR(task))
2975                 return PTR_ERR(task);
2976         status = nfs4_wait_for_completion_rpc_task(task);
2977         if (status == 0) {
2978                 status = data->rpc_status;
2979                 if (status == 0)
2980                         nfs_post_op_update_inode(inode, &data->fattr);
2981         }
2982         rpc_put_task(task);
2983         return status;
2984 }
2985
2986 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2987 {
2988         struct nfs_server *server = NFS_SERVER(inode);
2989         struct nfs4_exception exception = { };
2990         int err;
2991         do {
2992                 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2993                 switch (err) {
2994                         case -NFS4ERR_STALE_STATEID:
2995                         case -NFS4ERR_EXPIRED:
2996                                 nfs4_schedule_state_recovery(server->nfs_client);
2997                         case 0:
2998                                 return 0;
2999                 }
3000                 err = nfs4_handle_exception(server, err, &exception);
3001         } while (exception.retry);
3002         return err;
3003 }
3004
3005 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3006 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3007
3008 /*
3009  * sleep, with exponential backoff, and retry the LOCK operation.
3010  */
3011 static unsigned long
3012 nfs4_set_lock_task_retry(unsigned long timeout)
3013 {
3014         schedule_timeout_interruptible(timeout);
3015         timeout <<= 1;
3016         if (timeout > NFS4_LOCK_MAXTIMEOUT)
3017                 return NFS4_LOCK_MAXTIMEOUT;
3018         return timeout;
3019 }
3020
3021 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3022 {
3023         struct inode *inode = state->inode;
3024         struct nfs_server *server = NFS_SERVER(inode);
3025         struct nfs_client *clp = server->nfs_client;
3026         struct nfs_lockt_args arg = {
3027                 .fh = NFS_FH(inode),
3028                 .fl = request,
3029         };
3030         struct nfs_lockt_res res = {
3031                 .denied = request,
3032         };
3033         struct rpc_message msg = {
3034                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3035                 .rpc_argp       = &arg,
3036                 .rpc_resp       = &res,
3037                 .rpc_cred       = state->owner->so_cred,
3038         };
3039         struct nfs4_lock_state *lsp;
3040         int status;
3041
3042         down_read(&clp->cl_sem);
3043         arg.lock_owner.clientid = clp->cl_clientid;
3044         status = nfs4_set_lock_state(state, request);
3045         if (status != 0)
3046                 goto out;
3047         lsp = request->fl_u.nfs4_fl.owner;
3048         arg.lock_owner.id = lsp->ls_id;
3049         status = rpc_call_sync(server->client, &msg, 0);
3050         switch (status) {
3051                 case 0:
3052                         request->fl_type = F_UNLCK;
3053                         break;
3054                 case -NFS4ERR_DENIED:
3055                         status = 0;
3056         }
3057 out:
3058         up_read(&clp->cl_sem);
3059         return status;
3060 }
3061
3062 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3063 {
3064         struct nfs4_exception exception = { };
3065         int err;
3066
3067         do {
3068                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3069                                 _nfs4_proc_getlk(state, cmd, request),
3070                                 &exception);
3071         } while (exception.retry);
3072         return err;
3073 }
3074
3075 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3076 {
3077         int res = 0;
3078         switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3079                 case FL_POSIX:
3080                         res = posix_lock_file_wait(file, fl);
3081                         break;
3082                 case FL_FLOCK:
3083                         res = flock_lock_file_wait(file, fl);
3084                         break;
3085                 default:
3086                         BUG();
3087         }
3088         return res;
3089 }
3090
3091 struct nfs4_unlockdata {
3092         struct nfs_locku_args arg;
3093         struct nfs_locku_res res;
3094         struct nfs4_lock_state *lsp;
3095         struct nfs_open_context *ctx;
3096         struct file_lock fl;
3097         const struct nfs_server *server;
3098         unsigned long timestamp;
3099 };
3100
3101 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3102                 struct nfs_open_context *ctx,
3103                 struct nfs4_lock_state *lsp,
3104                 struct nfs_seqid *seqid)
3105 {
3106         struct nfs4_unlockdata *p;
3107         struct inode *inode = lsp->ls_state->inode;
3108
3109         p = kmalloc(sizeof(*p), GFP_KERNEL);
3110         if (p == NULL)
3111                 return NULL;
3112         p->arg.fh = NFS_FH(inode);
3113         p->arg.fl = &p->fl;
3114         p->arg.seqid = seqid;
3115         p->arg.stateid = &lsp->ls_stateid;
3116         p->lsp = lsp;
3117         atomic_inc(&lsp->ls_count);
3118         /* Ensure we don't close file until we're done freeing locks! */
3119         p->ctx = get_nfs_open_context(ctx);
3120         memcpy(&p->fl, fl, sizeof(p->fl));
3121         p->server = NFS_SERVER(inode);
3122         return p;
3123 }
3124
3125 static void nfs4_locku_release_calldata(void *data)
3126 {
3127         struct nfs4_unlockdata *calldata = data;
3128         nfs_free_seqid(calldata->arg.seqid);
3129         nfs4_put_lock_state(calldata->lsp);
3130         put_nfs_open_context(calldata->ctx);
3131         kfree(calldata);
3132 }
3133
3134 static void nfs4_locku_done(struct rpc_task *task, void *data)
3135 {
3136         struct nfs4_unlockdata *calldata = data;
3137
3138         if (RPC_ASSASSINATED(task))
3139                 return;
3140         nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3141         switch (task->tk_status) {
3142                 case 0:
3143                         memcpy(calldata->lsp->ls_stateid.data,
3144                                         calldata->res.stateid.data,
3145                                         sizeof(calldata->lsp->ls_stateid.data));
3146                         renew_lease(calldata->server, calldata->timestamp);
3147                         break;
3148                 case -NFS4ERR_STALE_STATEID:
3149                 case -NFS4ERR_EXPIRED:
3150                         nfs4_schedule_state_recovery(calldata->server->nfs_client);
3151                         break;
3152                 default:
3153                         if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
3154                                 rpc_restart_call(task);
3155                         }
3156         }
3157 }
3158
3159 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3160 {
3161         struct nfs4_unlockdata *calldata = data;
3162         struct rpc_message msg = {
3163                 .rpc_proc       = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3164                 .rpc_argp       = &calldata->arg,
3165                 .rpc_resp       = &calldata->res,
3166                 .rpc_cred       = calldata->lsp->ls_state->owner->so_cred,
3167         };
3168
3169         if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3170                 return;
3171         if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3172                 /* Note: exit _without_ running nfs4_locku_done */
3173                 task->tk_action = NULL;
3174                 return;
3175         }
3176         calldata->timestamp = jiffies;
3177         rpc_call_setup(task, &msg, 0);
3178 }
3179
3180 static const struct rpc_call_ops nfs4_locku_ops = {
3181         .rpc_call_prepare = nfs4_locku_prepare,
3182         .rpc_call_done = nfs4_locku_done,
3183         .rpc_release = nfs4_locku_release_calldata,
3184 };
3185
3186 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3187                 struct nfs_open_context *ctx,
3188                 struct nfs4_lock_state *lsp,
3189                 struct nfs_seqid *seqid)
3190 {
3191         struct nfs4_unlockdata *data;
3192
3193         data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3194         if (data == NULL) {
3195                 nfs_free_seqid(seqid);
3196                 return ERR_PTR(-ENOMEM);
3197         }
3198
3199         return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3200 }
3201
3202 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3203 {
3204         struct nfs_seqid *seqid;
3205         struct nfs4_lock_state *lsp;
3206         struct rpc_task *task;
3207         int status = 0;
3208
3209         status = nfs4_set_lock_state(state, request);
3210         /* Unlock _before_ we do the RPC call */
3211         request->fl_flags |= FL_EXISTS;
3212         if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3213                 goto out;
3214         if (status != 0)
3215                 goto out;
3216         /* Is this a delegated lock? */
3217         if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3218                 goto out;
3219         lsp = request->fl_u.nfs4_fl.owner;
3220         seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3221         status = -ENOMEM;
3222         if (seqid == NULL)
3223                 goto out;
3224         task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3225         status = PTR_ERR(task);
3226         if (IS_ERR(task))
3227                 goto out;
3228         status = nfs4_wait_for_completion_rpc_task(task);
3229         rpc_put_task(task);
3230 out:
3231         return status;
3232 }
3233
3234 struct nfs4_lockdata {
3235         struct nfs_lock_args arg;
3236         struct nfs_lock_res res;
3237         struct nfs4_lock_state *lsp;
3238         struct nfs_open_context *ctx;
3239         struct file_lock fl;
3240         unsigned long timestamp;
3241         int rpc_status;
3242         int cancelled;
3243 };
3244
3245 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3246                 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3247 {
3248         struct nfs4_lockdata *p;
3249         struct inode *inode = lsp->ls_state->inode;
3250         struct nfs_server *server = NFS_SERVER(inode);
3251
3252         p = kzalloc(sizeof(*p), GFP_KERNEL);
3253         if (p == NULL)
3254                 return NULL;
3255
3256         p->arg.fh = NFS_FH(inode);
3257         p->arg.fl = &p->fl;
3258         p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3259         if (p->arg.lock_seqid == NULL)
3260                 goto out_free;
3261         p->arg.lock_stateid = &lsp->ls_stateid;
3262         p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3263         p->arg.lock_owner.id = lsp->ls_id;
3264         p->lsp = lsp;
3265         atomic_inc(&lsp->ls_count);
3266         p->ctx = get_nfs_open_context(ctx);
3267         memcpy(&p->fl, fl, sizeof(p->fl));
3268         return p;
3269 out_free:
3270         kfree(p);
3271         return NULL;
3272 }
3273
3274 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3275 {
3276         struct nfs4_lockdata *data = calldata;
3277         struct nfs4_state *state = data->lsp->ls_state;
3278         struct nfs4_state_owner *sp = state->owner;
3279         struct rpc_message msg = {
3280                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3281                 .rpc_argp = &data->arg,
3282                 .rpc_resp = &data->res,
3283                 .rpc_cred = sp->so_cred,
3284         };
3285
3286         if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3287                 return;
3288         dprintk("%s: begin!\n", __FUNCTION__);
3289         /* Do we need to do an open_to_lock_owner? */
3290         if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3291                 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3292                 if (data->arg.open_seqid == NULL) {
3293                         data->rpc_status = -ENOMEM;
3294                         task->tk_action = NULL;
3295                         goto out;
3296                 }
3297                 data->arg.open_stateid = &state->stateid;
3298                 data->arg.new_lock_owner = 1;
3299         }
3300         data->timestamp = jiffies;
3301         rpc_call_setup(task, &msg, 0);
3302 out:
3303         dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3304 }
3305
3306 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3307 {
3308         struct nfs4_lockdata *data = calldata;
3309
3310         dprintk("%s: begin!\n", __FUNCTION__);
3311
3312         data->rpc_status = task->tk_status;
3313         if (RPC_ASSASSINATED(task))
3314                 goto out;
3315         if (data->arg.new_lock_owner != 0) {
3316                 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3317                 if (data->rpc_status == 0)
3318                         nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3319                 else
3320                         goto out;
3321         }
3322         if (data->rpc_status == 0) {
3323                 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3324                                         sizeof(data->lsp->ls_stateid.data));
3325                 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3326                 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
3327         }
3328         nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3329 out:
3330         dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3331 }
3332
3333 static void nfs4_lock_release(void *calldata)
3334 {
3335         struct nfs4_lockdata *data = calldata;
3336
3337         dprintk("%s: begin!\n", __FUNCTION__);
3338         if (data->arg.open_seqid != NULL)
3339                 nfs_free_seqid(data->arg.open_seqid);
3340         if (data->cancelled != 0) {
3341                 struct rpc_task *task;
3342                 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3343                                 data->arg.lock_seqid);
3344                 if (!IS_ERR(task))
3345                         rpc_put_task(task);
3346                 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3347         } else
3348                 nfs_free_seqid(data->arg.lock_seqid);
3349         nfs4_put_lock_state(data->lsp);
3350         put_nfs_open_context(data->ctx);
3351         kfree(data);
3352         dprintk("%s: done!\n", __FUNCTION__);
3353 }
3354
3355 static const struct rpc_call_ops nfs4_lock_ops = {
3356         .rpc_call_prepare = nfs4_lock_prepare,
3357         .rpc_call_done = nfs4_lock_done,
3358         .rpc_release = nfs4_lock_release,
3359 };
3360
3361 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3362 {
3363         struct nfs4_lockdata *data;
3364         struct rpc_task *task;
3365         int ret;
3366
3367         dprintk("%s: begin!\n", __FUNCTION__);
3368         data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3369                         fl->fl_u.nfs4_fl.owner);
3370         if (data == NULL)
3371                 return -ENOMEM;
3372         if (IS_SETLKW(cmd))
3373                 data->arg.block = 1;
3374         if (reclaim != 0)
3375                 data->arg.reclaim = 1;
3376         task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3377                         &nfs4_lock_ops, data);
3378         if (IS_ERR(task))
3379                 return PTR_ERR(task);
3380         ret = nfs4_wait_for_completion_rpc_task(task);
3381         if (ret == 0) {
3382                 ret = data->rpc_status;
3383                 if (ret == -NFS4ERR_DENIED)
3384                         ret = -EAGAIN;
3385         } else
3386                 data->cancelled = 1;
3387         rpc_put_task(task);
3388         dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3389         return ret;
3390 }
3391
3392 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3393 {
3394         struct nfs_server *server = NFS_SERVER(state->inode);
3395         struct nfs4_exception exception = { };
3396         int err;
3397
3398         do {
3399                 /* Cache the lock if possible... */
3400                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3401                         return 0;
3402                 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3403                 if (err != -NFS4ERR_DELAY)
3404                         break;
3405                 nfs4_handle_exception(server, err, &exception);
3406         } while (exception.retry);
3407         return err;
3408 }
3409
3410 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3411 {
3412         struct nfs_server *server = NFS_SERVER(state->inode);
3413         struct nfs4_exception exception = { };
3414         int err;
3415
3416         err = nfs4_set_lock_state(state, request);
3417         if (err != 0)
3418                 return err;
3419         do {
3420                 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3421                         return 0;
3422                 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3423                 if (err != -NFS4ERR_DELAY)
3424                         break;
3425                 nfs4_handle_exception(server, err, &exception);
3426         } while (exception.retry);
3427         return err;
3428 }
3429
3430 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3431 {
3432         struct nfs_client *clp = state->owner->so_client;
3433         unsigned char fl_flags = request->fl_flags;
3434         int status;
3435
3436         /* Is this a delegated open? */
3437         status = nfs4_set_lock_state(state, request);
3438         if (status != 0)
3439                 goto out;
3440         request->fl_flags |= FL_ACCESS;
3441         status = do_vfs_lock(request->fl_file, request);
3442         if (status < 0)
3443                 goto out;
3444         down_read(&clp->cl_sem);
3445         if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3446                 struct nfs_inode *nfsi = NFS_I(state->inode);
3447                 /* Yes: cache locks! */
3448                 down_read(&nfsi->rwsem);
3449                 /* ...but avoid races with delegation recall... */
3450                 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3451                         request->fl_flags = fl_flags & ~FL_SLEEP;
3452                         status = do_vfs_lock(request->fl_file, request);
3453                         up_read(&nfsi->rwsem);
3454                         goto out_unlock;
3455                 }
3456                 up_read(&nfsi->rwsem);
3457         }
3458         status = _nfs4_do_setlk(state, cmd, request, 0);
3459         if (status != 0)
3460                 goto out_unlock;
3461         /* Note: we always want to sleep here! */
3462         request->fl_flags = fl_flags | FL_SLEEP;
3463         if (do_vfs_lock(request->fl_file, request) < 0)
3464                 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3465 out_unlock:
3466         up_read(&clp->cl_sem);
3467 out:
3468         request->fl_flags = fl_flags;
3469         return status;
3470 }
3471
3472 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3473 {
3474         struct nfs4_exception exception = { };
3475         int err;
3476
3477         do {
3478                 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3479                                 _nfs4_proc_setlk(state, cmd, request),
3480                                 &exception);
3481         } while (exception.retry);
3482         return err;
3483 }
3484
3485 static int
3486 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3487 {
3488         struct nfs_open_context *ctx;
3489         struct nfs4_state *state;
3490         unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3491         int status;
3492
3493         /* verify open state */
3494         ctx = (struct nfs_open_context *)filp->private_data;
3495         state = ctx->state;
3496
3497         if (request->fl_start < 0 || request->fl_end < 0)
3498                 return -EINVAL;
3499
3500         if (IS_GETLK(cmd))
3501                 return nfs4_proc_getlk(state, F_GETLK, request);
3502
3503         if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3504                 return -EINVAL;
3505
3506         if (request->fl_type == F_UNLCK)
3507                 return nfs4_proc_unlck(state, cmd, request);
3508
3509         do {
3510                 status = nfs4_proc_setlk(state, cmd, request);
3511                 if ((status != -EAGAIN) || IS_SETLK(cmd))
3512                         break;
3513                 timeout = nfs4_set_lock_task_retry(timeout);
3514                 status = -ERESTARTSYS;
3515                 if (signalled())
3516                         break;
3517         } while(status < 0);
3518         return status;
3519 }
3520
3521 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3522 {
3523         struct nfs_server *server = NFS_SERVER(state->inode);
3524         struct nfs4_exception exception = { };
3525         int err;
3526
3527         err = nfs4_set_lock_state(state, fl);
3528         if (err != 0)
3529                 goto out;
3530         do {
3531                 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3532                 if (err != -NFS4ERR_DELAY)
3533                         break;
3534                 err = nfs4_handle_exception(server, err, &exception);
3535         } while (exception.retry);
3536 out:
3537         return err;
3538 }
3539
3540 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3541
3542 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3543                 size_t buflen, int flags)
3544 {
3545         struct inode *inode = dentry->d_inode;
3546
3547         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3548                 return -EOPNOTSUPP;
3549
3550         if (!S_ISREG(inode->i_mode) &&
3551             (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3552                 return -EPERM;
3553
3554         return nfs4_proc_set_acl(inode, buf, buflen);
3555 }
3556
3557 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3558  * and that's what we'll do for e.g. user attributes that haven't been set.
3559  * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3560  * attributes in kernel-managed attribute namespaces. */
3561 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3562                 size_t buflen)
3563 {
3564         struct inode *inode = dentry->d_inode;
3565
3566         if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3567                 return -EOPNOTSUPP;
3568
3569         return nfs4_proc_get_acl(inode, buf, buflen);
3570 }
3571
3572 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3573 {
3574         size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3575
3576         if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3577                 return 0;
3578         if (buf && buflen < len)
3579                 return -ERANGE;
3580         if (buf)
3581                 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3582         return len;
3583 }
3584
3585 int nfs4_proc_fs_locations(struct inode *dir, struct qstr *name,
3586                 struct nfs4_fs_locations *fs_locations, struct page *page)
3587 {
3588         struct nfs_server *server = NFS_SERVER(dir);
3589         u32 bitmask[2] = {
3590                 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3591                 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3592         };
3593         struct nfs4_fs_locations_arg args = {
3594                 .dir_fh = NFS_FH(dir),
3595                 .name = name,
3596                 .page = page,
3597                 .bitmask = bitmask,
3598         };
3599         struct rpc_message msg = {
3600                 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3601                 .rpc_argp = &args,
3602                 .rpc_resp = fs_locations,
3603         };
3604         int status;
3605
3606         dprintk("%s: start\n", __FUNCTION__);
3607         nfs_fattr_init(&fs_locations->fattr);
3608         fs_locations->server = server;
3609         fs_locations->nlocations = 0;
3610         status = rpc_call_sync(server->client, &msg, 0);
3611         dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3612         return status;
3613 }
3614
3615 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3616         .recover_open   = nfs4_open_reclaim,
3617         .recover_lock   = nfs4_lock_reclaim,
3618 };
3619
3620 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3621         .recover_open   = nfs4_open_expired,
3622         .recover_lock   = nfs4_lock_expired,
3623 };
3624
3625 static struct inode_operations nfs4_file_inode_operations = {
3626         .permission     = nfs_permission,
3627         .getattr        = nfs_getattr,
3628         .setattr        = nfs_setattr,
3629         .getxattr       = nfs4_getxattr,
3630         .setxattr       = nfs4_setxattr,
3631         .listxattr      = nfs4_listxattr,
3632 };
3633
3634 const struct nfs_rpc_ops nfs_v4_clientops = {
3635         .version        = 4,                    /* protocol version */
3636         .dentry_ops     = &nfs4_dentry_operations,
3637         .dir_inode_ops  = &nfs4_dir_inode_operations,
3638         .file_inode_ops = &nfs4_file_inode_operations,
3639         .getroot        = nfs4_proc_get_root,
3640         .getattr        = nfs4_proc_getattr,
3641         .setattr        = nfs4_proc_setattr,
3642         .lookupfh       = nfs4_proc_lookupfh,
3643         .lookup         = nfs4_proc_lookup,
3644         .access         = nfs4_proc_access,
3645         .readlink       = nfs4_proc_readlink,
3646         .read           = nfs4_proc_read,
3647         .create         = nfs4_proc_create,
3648         .remove         = nfs4_proc_remove,
3649         .unlink_setup   = nfs4_proc_unlink_setup,
3650         .unlink_done    = nfs4_proc_unlink_done,
3651         .rename         = nfs4_proc_rename,
3652         .link           = nfs4_proc_link,
3653         .symlink        = nfs4_proc_symlink,
3654         .mkdir          = nfs4_proc_mkdir,
3655         .rmdir          = nfs4_proc_remove,
3656         .readdir        = nfs4_proc_readdir,
3657         .mknod          = nfs4_proc_mknod,
3658         .statfs         = nfs4_proc_statfs,
3659         .fsinfo         = nfs4_proc_fsinfo,
3660         .pathconf       = nfs4_proc_pathconf,
3661         .set_capabilities = nfs4_server_capabilities,
3662         .decode_dirent  = nfs4_decode_dirent,
3663         .read_setup     = nfs4_proc_read_setup,
3664         .read_done      = nfs4_read_done,
3665         .write_setup    = nfs4_proc_write_setup,
3666         .write_done     = nfs4_write_done,
3667         .commit_setup   = nfs4_proc_commit_setup,
3668         .commit_done    = nfs4_commit_done,
3669         .file_open      = nfs_open,
3670         .file_release   = nfs_release,
3671         .lock           = nfs4_proc_lock,
3672         .clear_acl_cache = nfs4_zap_acl_attr,
3673 };
3674
3675 /*
3676  * Local variables:
3677  *  c-basic-offset: 8
3678  * End:
3679  */