fs/nfsd/nfs4proc.c

   1 /*
   2  *  Server-side procedures for NFSv4.
   3  *
   4  *  Copyright (c) 2002 The Regents of the University of Michigan.
   5  *  All rights reserved.
   6  *
   7  *  Kendrick Smith <kmsmith@umich.edu>
   8  *  Andy Adamson   <andros@umich.edu>
   9  *
  10  *  Redistribution and use in source and binary forms, with or without
  11  *  modification, are permitted provided that the following conditions
  12  *  are met:
  13  *
  14  *  1. Redistributions of source code must retain the above copyright
  15  *     notice, this list of conditions and the following disclaimer.
  16  *  2. Redistributions in binary form must reproduce the above copyright
  17  *     notice, this list of conditions and the following disclaimer in the
  18  *     documentation and/or other materials provided with the distribution.
  19  *  3. Neither the name of the University nor the names of its
  20  *     contributors may be used to endorse or promote products derived
  21  *     from this software without specific prior written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 #include <linux/file.h>
  36 #include <linux/slab.h>
  37
  38 #include "idmap.h"
  39 #include "cache.h"
  40 #include "xdr4.h"
  41 #include "vfs.h"
  42
  43 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  44
  45 static u32 nfsd_attrmask[] = {
  46         NFSD_WRITEABLE_ATTRS_WORD0,
  47         NFSD_WRITEABLE_ATTRS_WORD1,
  48         NFSD_WRITEABLE_ATTRS_WORD2
  49 };
  50
  51 static u32 nfsd41_ex_attrmask[] = {
  52         NFSD_SUPPATTR_EXCLCREAT_WORD0,
  53         NFSD_SUPPATTR_EXCLCREAT_WORD1,
  54         NFSD_SUPPATTR_EXCLCREAT_WORD2
  55 };
  56
  57 static __be32
  58 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  59                    u32 *bmval, u32 *writable)
  60 {
  61         struct dentry *dentry = cstate->current_fh.fh_dentry;
  62
  63         /*
  64          * Check about attributes are supported by the NFSv4 server or not.
  65          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  66          */
  67         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  68             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  69             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  70                 return nfserr_attrnotsupp;
  71
  72         /*
  73          * Check FATTR4_WORD0_ACL can be supported
  74          * in current environment or not.
  75          */
  76         if (bmval[0] & FATTR4_WORD0_ACL) {
  77                 if (!IS_POSIXACL(dentry->d_inode))
  78                         return nfserr_attrnotsupp;
  79         }
  80
  81         /*
  82          * According to spec, read-only attributes return ERR_INVAL.
  83          */
  84         if (writable) {
  85                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  86                     (bmval[2] & ~writable[2]))
  87                         return nfserr_inval;
  88         }
  89
  90         return nfs_ok;
  91 }
  92
  93 static __be32
  94 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
  95         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
  96 {
  97         __be32 status = nfs_ok;
  98
  99         if (open->op_create == NFS4_OPEN_CREATE) {
 100                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
 101                     || open->op_createmode == NFS4_CREATE_GUARDED)
 102                         status = check_attr_support(rqstp, cstate,
 103                                         open->op_bmval, nfsd_attrmask);
 104                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 105                         status = check_attr_support(rqstp, cstate,
 106                                         open->op_bmval, nfsd41_ex_attrmask);
 107         }
 108
 109         return status;
 110 }
 111
 112 static int
 113 is_create_with_attrs(struct nfsd4_open *open)
 114 {
 115         return open->op_create == NFS4_OPEN_CREATE
 116                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
 117                     || open->op_createmode == NFS4_CREATE_GUARDED
 118                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 119 }
 120
 121 /*
 122  * if error occurs when setting the acl, just clear the acl bit
 123  * in the returned attr bitmap.
 124  */
 125 static void
 126 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 127                 struct nfs4_acl *acl, u32 *bmval)
 128 {
 129         __be32 status;
 130
 131         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 132         if (status)
 133                 /*
 134                  * We should probably fail the whole open at this point,
 135                  * but we've already created the file, so it's too late;
 136                  * So this seems the least of evils:
 137                  */
 138                 bmval[0] &= ~FATTR4_WORD0_ACL;
 139 }
 140
 141 static inline void
 142 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 143 {
 144         fh_put(dst);
 145         dget(src->fh_dentry);
 146         if (src->fh_export)
 147                 cache_get(&src->fh_export->h);
 148         *dst = *src;
 149 }
 150
 151 static __be32
 152 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 153 {
 154         __be32 status;
 155
 156         if (open->op_truncate &&
 157                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 158                 return nfserr_inval;
 159
 160         accmode |= NFSD_MAY_READ_IF_EXEC;
 161
 162         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 163                 accmode |= NFSD_MAY_READ;
 164         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 165                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 166         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 167                 accmode |= NFSD_MAY_WRITE;
 168
 169         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 170
 171         return status;
 172 }
 173
 174 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 175 {
 176         umode_t mode = fh->fh_dentry->d_inode->i_mode;
 177
 178         if (S_ISREG(mode))
 179                 return nfs_ok;
 180         if (S_ISDIR(mode))
 181                 return nfserr_isdir;
 182         /*
 183          * Using err_symlink as our catch-all case may look odd; but
 184          * there's no other obvious error for this case in 4.0, and we
 185          * happen to know that it will cause the linux v4 client to do
 186          * the right thing on attempts to open something other than a
 187          * regular file.
 188          */
 189         return nfserr_symlink;
 190 }
 191
 192 static __be32
 193 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 194 {
 195         struct svc_fh resfh;
 196         __be32 status;
 197
 198         fh_init(&resfh, NFS4_FHSIZE);
 199         open->op_truncate = 0;
 200
 201         if (open->op_create) {
 202                 /* FIXME: check session persistence and pnfs flags.
 203                  * The nfsv4.1 spec requires the following semantics:
 204                  *
 205                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 206                  * Reply Cache  | server |                 |
 207                  * -------------+--------+-----------------+--------------------
 208                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 209                  *              |        |                 | (SHOULD)
 210                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 211                  *              |        |                 | (SHOULD NOT)
 212                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 213                  * yes          | no     | GUARDED4        | GUARDED4
 214                  * yes          | yes    | GUARDED4        | GUARDED4
 215                  */
 216
 217                 /*
 218                  * Note: create modes (UNCHECKED,GUARDED...) are the same
 219                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
 220                  */
 221                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 222                                         open->op_fname.len, &open->op_iattr,
 223                                         &resfh, open->op_createmode,
 224                                         (u32 *)open->op_verf.data,
 225                                         &open->op_truncate, &open->op_created);
 226
 227                 /*
 228                  * Following rfc 3530 14.2.16, use the returned bitmask
 229                  * to indicate which attributes we used to store the
 230                  * verifier:
 231                  */
 232                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 233                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 234                                                 FATTR4_WORD1_TIME_MODIFY);
 235         } else {
 236                 status = nfsd_lookup(rqstp, current_fh,
 237                                      open->op_fname.data, open->op_fname.len, &resfh);
 238                 fh_unlock(current_fh);
 239                 if (status)
 240                         goto out;
 241                 status = nfsd_check_obj_isreg(&resfh);
 242         }
 243         if (status)
 244                 goto out;
 245
 246         if (is_create_with_attrs(open) && open->op_acl != NULL)
 247                 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
 248
 249         set_change_info(&open->op_cinfo, current_fh);
 250         fh_dup2(current_fh, &resfh);
 251
 252         /* set reply cache */
 253         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 254                         &resfh.fh_handle);
 255         if (!open->op_created)
 256                 status = do_open_permission(rqstp, current_fh, open,
 257                                             NFSD_MAY_NOP);
 258
 259 out:
 260         fh_put(&resfh);
 261         return status;
 262 }
 263
 264 static __be32
 265 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 266 {
 267         __be32 status;
 268
 269         /* We don't know the target directory, and therefore can not
 270         * set the change info
 271         */
 272
 273         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 274
 275         /* set replay cache */
 276         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 277                         &current_fh->fh_handle);
 278
 279         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 280                 (open->op_iattr.ia_size == 0);
 281
 282         status = do_open_permission(rqstp, current_fh, open,
 283                                     NFSD_MAY_OWNER_OVERRIDE);
 284
 285         return status;
 286 }
 287
 288 static void
 289 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 290 {
 291         struct nfsd4_sessionid *sid =
 292                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 293
 294         clid->cl_boot = sid->clientid.cl_boot;
 295         clid->cl_id = sid->clientid.cl_id;
 296 }
 297
 298 static __be32
 299 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 300            struct nfsd4_open *open)
 301 {
 302         __be32 status;
 303         struct nfsd4_compoundres *resp;
 304
 305         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 306                 (int)open->op_fname.len, open->op_fname.data,
 307                 open->op_openowner);
 308
 309         /* This check required by spec. */
 310         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 311                 return nfserr_inval;
 312
 313         /* We don't yet support WANT bits: */
 314         open->op_share_access &= NFS4_SHARE_ACCESS_MASK;
 315
 316         open->op_created = 0;
 317         /*
 318          * RFC5661 18.51.3
 319          * Before RECLAIM_COMPLETE done, server should deny new lock
 320          */
 321         if (nfsd4_has_session(cstate) &&
 322             !cstate->session->se_client->cl_firststate &&
 323             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 324                 return nfserr_grace;
 325
 326         if (nfsd4_has_session(cstate))
 327                 copy_clientid(&open->op_clientid, cstate->session);
 328
 329         nfs4_lock_state();
 330
 331         /* check seqid for replay. set nfs4_owner */
 332         resp = rqstp->rq_resp;
 333         status = nfsd4_process_open1(&resp->cstate, open);
 334         if (status == nfserr_replay_me) {
 335                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 336                 fh_put(&cstate->current_fh);
 337                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 338                                 &rp->rp_openfh);
 339                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 340                 if (status)
 341                         dprintk("nfsd4_open: replay failed"
 342                                 " restoring previous filehandle\n");
 343                 else
 344                         status = nfserr_replay_me;
 345         }
 346         if (status)
 347                 goto out;
 348
 349         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 350         if (status)
 351                 goto out;
 352
 353         /* Openowner is now set, so sequence id will get bumped.  Now we need
 354          * these checks before we do any creates: */
 355         status = nfserr_grace;
 356         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 357                 goto out;
 358         status = nfserr_no_grace;
 359         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 360                 goto out;
 361
 362         switch (open->op_claim_type) {
 363                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 364                 case NFS4_OPEN_CLAIM_NULL:
 365                         status = do_open_lookup(rqstp, &cstate->current_fh,
 366                                                 open);
 367                         if (status)
 368                                 goto out;
 369                         break;
 370                 case NFS4_OPEN_CLAIM_PREVIOUS:
 371                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 372                         status = nfs4_check_open_reclaim(&open->op_clientid);
 373                         if (status)
 374                                 goto out;
 375                 case NFS4_OPEN_CLAIM_FH:
 376                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 377                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 378                                                  open);
 379                         if (status)
 380                                 goto out;
 381                         break;
 382                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 383                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 384                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 385                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 386                                 open->op_claim_type);
 387                         status = nfserr_notsupp;
 388                         goto out;
 389                 default:
 390                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 391                                 open->op_claim_type);
 392                         status = nfserr_inval;
 393                         goto out;
 394         }
 395         /*
 396          * nfsd4_process_open2() does the actual opening of the file.  If
 397          * successful, it (1) truncates the file if open->op_truncate was
 398          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 399          */
 400         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 401         WARN_ON(status && open->op_created);
 402 out:
 403         nfsd4_cleanup_open_state(open, status);
 404         if (open->op_openowner)
 405                 cstate->replay_owner = &open->op_openowner->oo_owner;
 406         else
 407                 nfs4_unlock_state();
 408         return status;
 409 }
 410
 411 /*
 412  * filehandle-manipulating ops.
 413  */
 414 static __be32
 415 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 416             struct svc_fh **getfh)
 417 {
 418         if (!cstate->current_fh.fh_dentry)
 419                 return nfserr_nofilehandle;
 420
 421         *getfh = &cstate->current_fh;
 422         return nfs_ok;
 423 }
 424
 425 static __be32
 426 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 427             struct nfsd4_putfh *putfh)
 428 {
 429         fh_put(&cstate->current_fh);
 430         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 431         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 432                putfh->pf_fhlen);
 433         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 434 }
 435
 436 static __be32
 437 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 438                 void *arg)
 439 {
 440         __be32 status;
 441
 442         fh_put(&cstate->current_fh);
 443         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 444         return status;
 445 }
 446
 447 static __be32
 448 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 449                 void *arg)
 450 {
 451         if (!cstate->save_fh.fh_dentry)
 452                 return nfserr_restorefh;
 453
 454         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 455         return nfs_ok;
 456 }
 457
 458 static __be32
 459 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 460              void *arg)
 461 {
 462         if (!cstate->current_fh.fh_dentry)
 463                 return nfserr_nofilehandle;
 464
 465         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 466         return nfs_ok;
 467 }
 468
 469 /*
 470  * misc nfsv4 ops
 471  */
 472 static __be32
 473 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 474              struct nfsd4_access *access)
 475 {
 476         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 477                 return nfserr_inval;
 478
 479         access->ac_resp_access = access->ac_req_access;
 480         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 481                            &access->ac_supported);
 482 }
 483
 484 static __be32
 485 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 486              struct nfsd4_commit *commit)
 487 {
 488         u32 *p = (u32 *)commit->co_verf.data;
 489         *p++ = nfssvc_boot.tv_sec;
 490         *p++ = nfssvc_boot.tv_usec;
 491
 492         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 493                              commit->co_count);
 494 }
 495
 496 static __be32
 497 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 498              struct nfsd4_create *create)
 499 {
 500         struct svc_fh resfh;
 501         __be32 status;
 502         dev_t rdev;
 503
 504         fh_init(&resfh, NFS4_FHSIZE);
 505
 506         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 507                            NFSD_MAY_CREATE);
 508         if (status)
 509                 return status;
 510
 511         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 512                                     nfsd_attrmask);
 513         if (status)
 514                 return status;
 515
 516         switch (create->cr_type) {
 517         case NF4LNK:
 518                 /* ugh! we have to null-terminate the linktext, or
 519                  * vfs_symlink() will choke.  it is always safe to
 520                  * null-terminate by brute force, since at worst we
 521                  * will overwrite the first byte of the create namelen
 522                  * in the XDR buffer, which has already been extracted
 523                  * during XDR decode.
 524                  */
 525                 create->cr_linkname[create->cr_linklen] = 0;
 526
 527                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 528                                       create->cr_name, create->cr_namelen,
 529                                       create->cr_linkname, create->cr_linklen,
 530                                       &resfh, &create->cr_iattr);
 531                 break;
 532
 533         case NF4BLK:
 534                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 535                 if (MAJOR(rdev) != create->cr_specdata1 ||
 536                     MINOR(rdev) != create->cr_specdata2)
 537                         return nfserr_inval;
 538                 status = nfsd_create(rqstp, &cstate->current_fh,
 539                                      create->cr_name, create->cr_namelen,
 540                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 541                 break;
 542
 543         case NF4CHR:
 544                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 545                 if (MAJOR(rdev) != create->cr_specdata1 ||
 546                     MINOR(rdev) != create->cr_specdata2)
 547                         return nfserr_inval;
 548                 status = nfsd_create(rqstp, &cstate->current_fh,
 549                                      create->cr_name, create->cr_namelen,
 550                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 551                 break;
 552
 553         case NF4SOCK:
 554                 status = nfsd_create(rqstp, &cstate->current_fh,
 555                                      create->cr_name, create->cr_namelen,
 556                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 557                 break;
 558
 559         case NF4FIFO:
 560                 status = nfsd_create(rqstp, &cstate->current_fh,
 561                                      create->cr_name, create->cr_namelen,
 562                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 563                 break;
 564
 565         case NF4DIR:
 566                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 567                 status = nfsd_create(rqstp, &cstate->current_fh,
 568                                      create->cr_name, create->cr_namelen,
 569                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 570                 break;
 571
 572         default:
 573                 status = nfserr_badtype;
 574         }
 575
 576         if (status)
 577                 goto out;
 578
 579         if (create->cr_acl != NULL)
 580                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 581                                 create->cr_bmval);
 582
 583         fh_unlock(&cstate->current_fh);
 584         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 585         fh_dup2(&cstate->current_fh, &resfh);
 586 out:
 587         fh_put(&resfh);
 588         return status;
 589 }
 590
 591 static __be32
 592 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 593               struct nfsd4_getattr *getattr)
 594 {
 595         __be32 status;
 596
 597         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 598         if (status)
 599                 return status;
 600
 601         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 602                 return nfserr_inval;
 603
 604         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 605         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 606         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 607
 608         getattr->ga_fhp = &cstate->current_fh;
 609         return nfs_ok;
 610 }
 611
 612 static __be32
 613 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 614            struct nfsd4_link *link)
 615 {
 616         __be32 status = nfserr_nofilehandle;
 617
 618         if (!cstate->save_fh.fh_dentry)
 619                 return status;
 620         status = nfsd_link(rqstp, &cstate->current_fh,
 621                            link->li_name, link->li_namelen, &cstate->save_fh);
 622         if (!status)
 623                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 624         return status;
 625 }
 626
 627 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 628 {
 629         struct svc_fh tmp_fh;
 630         __be32 ret;
 631
 632         fh_init(&tmp_fh, NFS4_FHSIZE);
 633         ret = exp_pseudoroot(rqstp, &tmp_fh);
 634         if (ret)
 635                 return ret;
 636         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 637                 fh_put(&tmp_fh);
 638                 return nfserr_noent;
 639         }
 640         fh_put(&tmp_fh);
 641         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 642 }
 643
 644 static __be32
 645 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 646               void *arg)
 647 {
 648         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 649 }
 650
 651 static __be32
 652 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 653              struct nfsd4_lookup *lookup)
 654 {
 655         return nfsd_lookup(rqstp, &cstate->current_fh,
 656                            lookup->lo_name, lookup->lo_len,
 657                            &cstate->current_fh);
 658 }
 659
 660 static __be32
 661 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 662            struct nfsd4_read *read)
 663 {
 664         __be32 status;
 665
 666         /* no need to check permission - this will be done in nfsd_read() */
 667
 668         read->rd_filp = NULL;
 669         if (read->rd_offset >= OFFSET_MAX)
 670                 return nfserr_inval;
 671
 672         nfs4_lock_state();
 673         /* check stateid */
 674         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 675                                                  RD_STATE, &read->rd_filp))) {
 676                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 677                 goto out;
 678         }
 679         if (read->rd_filp)
 680                 get_file(read->rd_filp);
 681         status = nfs_ok;
 682 out:
 683         nfs4_unlock_state();
 684         read->rd_rqstp = rqstp;
 685         read->rd_fhp = &cstate->current_fh;
 686         return status;
 687 }
 688
 689 static __be32
 690 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 691               struct nfsd4_readdir *readdir)
 692 {
 693         u64 cookie = readdir->rd_cookie;
 694         static const nfs4_verifier zeroverf;
 695
 696         /* no need to check permission - this will be done in nfsd_readdir() */
 697
 698         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 699                 return nfserr_inval;
 700
 701         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 702         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 703         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 704
 705         if ((cookie == 1) || (cookie == 2) ||
 706             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 707                 return nfserr_bad_cookie;
 708
 709         readdir->rd_rqstp = rqstp;
 710         readdir->rd_fhp = &cstate->current_fh;
 711         return nfs_ok;
 712 }
 713
 714 static __be32
 715 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 716                struct nfsd4_readlink *readlink)
 717 {
 718         readlink->rl_rqstp = rqstp;
 719         readlink->rl_fhp = &cstate->current_fh;
 720         return nfs_ok;
 721 }
 722
 723 static __be32
 724 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 725              struct nfsd4_remove *remove)
 726 {
 727         __be32 status;
 728
 729         if (locks_in_grace())
 730                 return nfserr_grace;
 731         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 732                              remove->rm_name, remove->rm_namelen);
 733         if (!status) {
 734                 fh_unlock(&cstate->current_fh);
 735                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 736         }
 737         return status;
 738 }
 739
 740 static __be32
 741 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 742              struct nfsd4_rename *rename)
 743 {
 744         __be32 status = nfserr_nofilehandle;
 745
 746         if (!cstate->save_fh.fh_dentry)
 747                 return status;
 748         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 749                                         & NFSEXP_NOSUBTREECHECK))
 750                 return nfserr_grace;
 751         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 752                              rename->rn_snamelen, &cstate->current_fh,
 753                              rename->rn_tname, rename->rn_tnamelen);
 754
 755         /* the underlying filesystem returns different error's than required
 756          * by NFSv4. both save_fh and current_fh have been verified.. */
 757         if (status == nfserr_isdir)
 758                 status = nfserr_exist;
 759         else if ((status == nfserr_notdir) &&
 760                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 761                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 762                 status = nfserr_exist;
 763
 764         if (!status) {
 765                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 766                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 767         }
 768         return status;
 769 }
 770
 771 static __be32
 772 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 773               struct nfsd4_secinfo *secinfo)
 774 {
 775         struct svc_fh resfh;
 776         struct svc_export *exp;
 777         struct dentry *dentry;
 778         __be32 err;
 779
 780         fh_init(&resfh, NFS4_FHSIZE);
 781         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 782         if (err)
 783                 return err;
 784         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 785                                     secinfo->si_name, secinfo->si_namelen,
 786                                     &exp, &dentry);
 787         if (err)
 788                 return err;
 789         if (dentry->d_inode == NULL) {
 790                 exp_put(exp);
 791                 err = nfserr_noent;
 792         } else
 793                 secinfo->si_exp = exp;
 794         dput(dentry);
 795         if (cstate->minorversion)
 796                 /* See rfc 5661 section 2.6.3.1.1.8 */
 797                 fh_put(&cstate->current_fh);
 798         return err;
 799 }
 800
 801 static __be32
 802 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 803               struct nfsd4_secinfo_no_name *sin)
 804 {
 805         __be32 err;
 806
 807         switch (sin->sin_style) {
 808         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 809                 break;
 810         case NFS4_SECINFO_STYLE4_PARENT:
 811                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 812                 if (err)
 813                         return err;
 814                 break;
 815         default:
 816                 return nfserr_inval;
 817         }
 818         exp_get(cstate->current_fh.fh_export);
 819         sin->sin_exp = cstate->current_fh.fh_export;
 820         fh_put(&cstate->current_fh);
 821         return nfs_ok;
 822 }
 823
 824 static __be32
 825 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 826               struct nfsd4_setattr *setattr)
 827 {
 828         __be32 status = nfs_ok;
 829
 830         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 831                 nfs4_lock_state();
 832                 status = nfs4_preprocess_stateid_op(cstate,
 833                         &setattr->sa_stateid, WR_STATE, NULL);
 834                 nfs4_unlock_state();
 835                 if (status) {
 836                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 837                         return status;
 838                 }
 839         }
 840         status = fh_want_write(&cstate->current_fh);
 841         if (status)
 842                 return status;
 843         status = nfs_ok;
 844
 845         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 846                                     nfsd_attrmask);
 847         if (status)
 848                 goto out;
 849
 850         if (setattr->sa_acl != NULL)
 851                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 852                                             setattr->sa_acl);
 853         if (status)
 854                 goto out;
 855         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 856                                 0, (time_t)0);
 857 out:
 858         fh_drop_write(&cstate->current_fh);
 859         return status;
 860 }
 861
 862 static __be32
 863 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 864             struct nfsd4_write *write)
 865 {
 866         stateid_t *stateid = &write->wr_stateid;
 867         struct file *filp = NULL;
 868         u32 *p;
 869         __be32 status = nfs_ok;
 870         unsigned long cnt;
 871
 872         /* no need to check permission - this will be done in nfsd_write() */
 873
 874         if (write->wr_offset >= OFFSET_MAX)
 875                 return nfserr_inval;
 876
 877         nfs4_lock_state();
 878         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 879         if (filp)
 880                 get_file(filp);
 881         nfs4_unlock_state();
 882
 883         if (status) {
 884                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 885                 return status;
 886         }
 887
 888         cnt = write->wr_buflen;
 889         write->wr_how_written = write->wr_stable_how;
 890         p = (u32 *)write->wr_verifier.data;
 891         *p++ = nfssvc_boot.tv_sec;
 892         *p++ = nfssvc_boot.tv_usec;
 893
 894         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 895                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 896                              &cnt, &write->wr_how_written);
 897         if (filp)
 898                 fput(filp);
 899
 900         write->wr_bytes_written = cnt;
 901
 902         return status;
 903 }
 904
 905 /* This routine never returns NFS_OK!  If there are no other errors, it
 906  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 907  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 908  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 909  */
 910 static __be32
 911 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 912              struct nfsd4_verify *verify)
 913 {
 914         __be32 *buf, *p;
 915         int count;
 916         __be32 status;
 917
 918         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 919         if (status)
 920                 return status;
 921
 922         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 923         if (status)
 924                 return status;
 925
 926         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 927             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 928                 return nfserr_inval;
 929         if (verify->ve_attrlen & 3)
 930                 return nfserr_inval;
 931
 932         /* count in words:
 933          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 934          */
 935         count = 4 + (verify->ve_attrlen >> 2);
 936         buf = kmalloc(count << 2, GFP_KERNEL);
 937         if (!buf)
 938                 return nfserr_jukebox;
 939
 940         status = nfsd4_encode_fattr(&cstate->current_fh,
 941                                     cstate->current_fh.fh_export,
 942                                     cstate->current_fh.fh_dentry, buf,
 943                                     &count, verify->ve_bmval,
 944                                     rqstp, 0);
 945
 946         /* this means that nfsd4_encode_fattr() ran out of space */
 947         if (status == nfserr_resource && count == 0)
 948                 status = nfserr_not_same;
 949         if (status)
 950                 goto out_kfree;
 951
 952         /* skip bitmap */
 953         p = buf + 1 + ntohl(buf[0]);
 954         status = nfserr_not_same;
 955         if (ntohl(*p++) != verify->ve_attrlen)
 956                 goto out_kfree;
 957         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 958                 status = nfserr_same;
 959
 960 out_kfree:
 961         kfree(buf);
 962         return status;
 963 }
 964
 965 static __be32
 966 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 967               struct nfsd4_verify *verify)
 968 {
 969         __be32 status;
 970
 971         status = _nfsd4_verify(rqstp, cstate, verify);
 972         return status == nfserr_not_same ? nfs_ok : status;
 973 }
 974
 975 static __be32
 976 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 977              struct nfsd4_verify *verify)
 978 {
 979         __be32 status;
 980
 981         status = _nfsd4_verify(rqstp, cstate, verify);
 982         return status == nfserr_same ? nfs_ok : status;
 983 }
 984
 985 /*
 986  * NULL call.
 987  */
 988 static __be32
 989 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 990 {
 991         return nfs_ok;
 992 }
 993
 994 static inline void nfsd4_increment_op_stats(u32 opnum)
 995 {
 996         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
 997                 nfsdstats.nfs4_opcount[opnum]++;
 998 }
 999
1000 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1001                               void *);
1002 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1003
1004 enum nfsd4_op_flags {
1005         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1006         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1007         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1008         /* For rfc 5661 section 2.6.3.1.1: */
1009         OP_HANDLES_WRONGSEC = 1 << 3,
1010         OP_IS_PUTFH_LIKE = 1 << 4,
1011         /*
1012          * These are the ops whose result size we estimate before
1013          * encoding, to avoid performing an op then not being able to
1014          * respond or cache a response.  This includes writes and setattrs
1015          * as well as the operations usually called "nonidempotent":
1016          */
1017         OP_MODIFIES_SOMETHING = 1 << 5,
1018         /*
1019          * Cache compounds containing these ops in the xid-based drc:
1020          * We use the DRC for compounds containing non-idempotent
1021          * operations, *except* those that are 4.1-specific (since
1022          * sessions provide their own EOS), and except for stateful
1023          * operations other than setclientid and setclientid_confirm
1024          * (since sequence numbers provide EOS for open, lock, etc in
1025          * the v4.0 case).
1026          */
1027         OP_CACHEME = 1 << 6,
1028 };
1029
1030 struct nfsd4_operation {
1031         nfsd4op_func op_func;
1032         u32 op_flags;
1033         char *op_name;
1034         /* Try to get response size before operation */
1035         nfsd4op_rsize op_rsize_bop;
1036 };
1037
1038 static struct nfsd4_operation nfsd4_ops[];
1039
1040 static const char *nfsd4_op_name(unsigned opnum);
1041
1042 /*
1043  * Enforce NFSv4.1 COMPOUND ordering rules:
1044  *
1045  * Also note, enforced elsewhere:
1046  *      - SEQUENCE other than as first op results in
1047  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1048  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1049  *        (Enforced in nfsd4_bind_conn_to_session().)
1050  *      - DESTROY_SESSION must be the final operation in a compound, if
1051  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1052  *        (Enforced in nfsd4_destroy_session().)
1053  */
1054 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1055 {
1056         struct nfsd4_op *op = &args->ops[0];
1057
1058         /* These ordering requirements don't apply to NFSv4.0: */
1059         if (args->minorversion == 0)
1060                 return nfs_ok;
1061         /* This is weird, but OK, not our problem: */
1062         if (args->opcnt == 0)
1063                 return nfs_ok;
1064         if (op->status == nfserr_op_illegal)
1065                 return nfs_ok;
1066         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1067                 return nfserr_op_not_in_session;
1068         if (op->opnum == OP_SEQUENCE)
1069                 return nfs_ok;
1070         if (args->opcnt != 1)
1071                 return nfserr_not_only_op;
1072         return nfs_ok;
1073 }
1074
1075 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1076 {
1077         return &nfsd4_ops[op->opnum];
1078 }
1079
1080 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1081 {
1082         return OPDESC(op)->op_flags & OP_CACHEME;
1083 }
1084
1085 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1086 {
1087         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1088         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1089         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1090         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1091         struct nfsd4_operation *thisd;
1092         struct nfsd4_operation *nextd;
1093
1094         thisd = OPDESC(this);
1095         /*
1096          * Most ops check wronsec on our own; only the putfh-like ops
1097          * have special rules.
1098          */
1099         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1100                 return false;
1101         /*
1102          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1103          * put-filehandle operation if we're not going to use the
1104          * result:
1105          */
1106         if (argp->opcnt == resp->opcnt)
1107                 return false;
1108
1109         nextd = OPDESC(next);
1110         /*
1111          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1112          * errors themselves as necessary; others should check for them
1113          * now:
1114          */
1115         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1116 }
1117
1118 /*
1119  * COMPOUND call.
1120  */
1121 static __be32
1122 nfsd4_proc_compound(struct svc_rqst *rqstp,
1123                     struct nfsd4_compoundargs *args,
1124                     struct nfsd4_compoundres *resp)
1125 {
1126         struct nfsd4_op *op;
1127         struct nfsd4_operation *opdesc;
1128         struct nfsd4_compound_state *cstate = &resp->cstate;
1129         int             slack_bytes;
1130         u32             plen = 0;
1131         __be32          status;
1132
1133         resp->xbuf = &rqstp->rq_res;
1134         resp->p = rqstp->rq_res.head[0].iov_base +
1135                                                 rqstp->rq_res.head[0].iov_len;
1136         resp->tagp = resp->p;
1137         /* reserve space for: taglen, tag, and opcnt */
1138         resp->p += 2 + XDR_QUADLEN(args->taglen);
1139         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1140         resp->taglen = args->taglen;
1141         resp->tag = args->tag;
1142         resp->opcnt = 0;
1143         resp->rqstp = rqstp;
1144         resp->cstate.minorversion = args->minorversion;
1145         resp->cstate.replay_owner = NULL;
1146         resp->cstate.session = NULL;
1147         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1148         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1149         /*
1150          * Don't use the deferral mechanism for NFSv4; compounds make it
1151          * too hard to avoid non-idempotency problems.
1152          */
1153         rqstp->rq_usedeferral = 0;
1154
1155         /*
1156          * According to RFC3010, this takes precedence over all other errors.
1157          */
1158         status = nfserr_minor_vers_mismatch;
1159         if (args->minorversion > nfsd_supported_minorversion)
1160                 goto out;
1161
1162         status = nfs41_check_op_ordering(args);
1163         if (status) {
1164                 op = &args->ops[0];
1165                 op->status = status;
1166                 goto encode_op;
1167         }
1168
1169         while (!status && resp->opcnt < args->opcnt) {
1170                 op = &args->ops[resp->opcnt++];
1171
1172                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1173                         resp->opcnt, args->opcnt, op->opnum,
1174                         nfsd4_op_name(op->opnum));
1175                 /*
1176                  * The XDR decode routines may have pre-set op->status;
1177                  * for example, if there is a miscellaneous XDR error
1178                  * it will be set to nfserr_bad_xdr.
1179                  */
1180                 if (op->status)
1181                         goto encode_op;
1182
1183                 /* We must be able to encode a successful response to
1184                  * this operation, with enough room left over to encode a
1185                  * failed response to the next operation.  If we don't
1186                  * have enough room, fail with ERR_RESOURCE.
1187                  */
1188                 slack_bytes = (char *)resp->end - (char *)resp->p;
1189                 if (slack_bytes < COMPOUND_SLACK_SPACE
1190                                 + COMPOUND_ERR_SLACK_SPACE) {
1191                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1192                         op->status = nfserr_resource;
1193                         goto encode_op;
1194                 }
1195
1196                 opdesc = OPDESC(op);
1197
1198                 if (!cstate->current_fh.fh_dentry) {
1199                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1200                                 op->status = nfserr_nofilehandle;
1201                                 goto encode_op;
1202                         }
1203                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1204                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1205                         op->status = nfserr_moved;
1206                         goto encode_op;
1207                 }
1208
1209                 /* If op is non-idempotent */
1210                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1211                         plen = opdesc->op_rsize_bop(rqstp, op);
1212                         op->status = nfsd4_check_resp_size(resp, plen);
1213                 }
1214
1215                 if (op->status)
1216                         goto encode_op;
1217
1218                 if (opdesc->op_func)
1219                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1220                 else
1221                         BUG_ON(op->status == nfs_ok);
1222
1223                 if (!op->status && need_wrongsec_check(rqstp))
1224                         op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1225
1226 encode_op:
1227                 /* Only from SEQUENCE */
1228                 if (resp->cstate.status == nfserr_replay_cache) {
1229                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1230                         status = op->status;
1231                         goto out;
1232                 }
1233                 if (op->status == nfserr_replay_me) {
1234                         op->replay = &cstate->replay_owner->so_replay;
1235                         nfsd4_encode_replay(resp, op);
1236                         status = op->status = op->replay->rp_status;
1237                 } else {
1238                         nfsd4_encode_operation(resp, op);
1239                         status = op->status;
1240                 }
1241
1242                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1243                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1244                         be32_to_cpu(status));
1245
1246                 if (cstate->replay_owner) {
1247                         nfs4_unlock_state();
1248                         cstate->replay_owner = NULL;
1249                 }
1250                 /* XXX Ugh, we need to get rid of this kind of special case: */
1251                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1252                         fput(op->u.read.rd_filp);
1253
1254                 nfsd4_increment_op_stats(op->opnum);
1255         }
1256
1257         resp->cstate.status = status;
1258         fh_put(&resp->cstate.current_fh);
1259         fh_put(&resp->cstate.save_fh);
1260         BUG_ON(resp->cstate.replay_owner);
1261 out:
1262         /* Reset deferral mechanism for RPC deferrals */
1263         rqstp->rq_usedeferral = 1;
1264         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1265         return status;
1266 }
1267
1268 #define op_encode_hdr_size              (2)
1269 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1270 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1271 #define op_encode_change_info_maxsz     (5)
1272 #define nfs4_fattr_bitmap_maxsz         (4)
1273
1274 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1275 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1276
1277 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1278
1279 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1280 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1281                                          op_encode_ace_maxsz)
1282
1283 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1284
1285 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1286 {
1287         return (op_encode_hdr_size) * sizeof(__be32);
1288 }
1289
1290 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1291 {
1292         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1293 }
1294
1295 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1296 {
1297         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1298 }
1299
1300 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1301 {
1302         return (op_encode_hdr_size + op_encode_change_info_maxsz
1303                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1304 }
1305
1306 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1307 {
1308         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1309                 * sizeof(__be32);
1310 }
1311
1312 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1313 {
1314         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1315                 * sizeof(__be32);
1316 }
1317
1318 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1319 {
1320         return (op_encode_hdr_size + op_encode_stateid_maxsz
1321                 + op_encode_change_info_maxsz + 1
1322                 + nfs4_fattr_bitmap_maxsz
1323                 + op_encode_delegation_maxsz) * sizeof(__be32);
1324 }
1325
1326 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1327 {
1328         u32 maxcount = 0, rlen = 0;
1329
1330         maxcount = svc_max_payload(rqstp);
1331         rlen = op->u.read.rd_length;
1332
1333         if (rlen > maxcount)
1334                 rlen = maxcount;
1335
1336         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1337 }
1338
1339 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1340 {
1341         u32 rlen = op->u.readdir.rd_maxcount;
1342
1343         if (rlen > PAGE_SIZE)
1344                 rlen = PAGE_SIZE;
1345
1346         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1347                  * sizeof(__be32) + rlen;
1348 }
1349
1350 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1351 {
1352         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1353                 * sizeof(__be32);
1354 }
1355
1356 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1357 {
1358         return (op_encode_hdr_size + op_encode_change_info_maxsz
1359                 + op_encode_change_info_maxsz) * sizeof(__be32);
1360 }
1361
1362 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1363 {
1364         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1365 }
1366
1367 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1368 {
1369         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1370 }
1371
1372 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1373 {
1374         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1375 }
1376
1377 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1378 {
1379         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1380                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1381                 2 + /*eir_server_owner.so_minor_id */\
1382                 /* eir_server_owner.so_major_id<> */\
1383                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1384                 /* eir_server_scope<> */\
1385                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1386                 1 + /* eir_server_impl_id array length */\
1387                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1388 }
1389
1390 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1391 {
1392         return (op_encode_hdr_size + \
1393                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1394                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1395 }
1396
1397 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1398 {
1399         return (op_encode_hdr_size + \
1400                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1401                 2 + /* csr_sequence, csr_flags */\
1402                 op_encode_channel_attrs_maxsz + \
1403                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1404 }
1405
1406 static struct nfsd4_operation nfsd4_ops[] = {
1407         [OP_ACCESS] = {
1408                 .op_func = (nfsd4op_func)nfsd4_access,
1409                 .op_name = "OP_ACCESS",
1410         },
1411         [OP_CLOSE] = {
1412                 .op_func = (nfsd4op_func)nfsd4_close,
1413                 .op_flags = OP_MODIFIES_SOMETHING,
1414                 .op_name = "OP_CLOSE",
1415                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1416         },
1417         [OP_COMMIT] = {
1418                 .op_func = (nfsd4op_func)nfsd4_commit,
1419                 .op_flags = OP_MODIFIES_SOMETHING,
1420                 .op_name = "OP_COMMIT",
1421                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1422         },
1423         [OP_CREATE] = {
1424                 .op_func = (nfsd4op_func)nfsd4_create,
1425                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1426                 .op_name = "OP_CREATE",
1427                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1428         },
1429         [OP_DELEGRETURN] = {
1430                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1431                 .op_flags = OP_MODIFIES_SOMETHING,
1432                 .op_name = "OP_DELEGRETURN",
1433                 .op_rsize_bop = nfsd4_only_status_rsize,
1434         },
1435         [OP_GETATTR] = {
1436                 .op_func = (nfsd4op_func)nfsd4_getattr,
1437                 .op_flags = ALLOWED_ON_ABSENT_FS,
1438                 .op_name = "OP_GETATTR",
1439         },
1440         [OP_GETFH] = {
1441                 .op_func = (nfsd4op_func)nfsd4_getfh,
1442                 .op_name = "OP_GETFH",
1443         },
1444         [OP_LINK] = {
1445                 .op_func = (nfsd4op_func)nfsd4_link,
1446                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1447                                 | OP_CACHEME,
1448                 .op_name = "OP_LINK",
1449                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1450         },
1451         [OP_LOCK] = {
1452                 .op_func = (nfsd4op_func)nfsd4_lock,
1453                 .op_flags = OP_MODIFIES_SOMETHING,
1454                 .op_name = "OP_LOCK",
1455                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1456         },
1457         [OP_LOCKT] = {
1458                 .op_func = (nfsd4op_func)nfsd4_lockt,
1459                 .op_name = "OP_LOCKT",
1460         },
1461         [OP_LOCKU] = {
1462                 .op_func = (nfsd4op_func)nfsd4_locku,
1463                 .op_flags = OP_MODIFIES_SOMETHING,
1464                 .op_name = "OP_LOCKU",
1465                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1466         },
1467         [OP_LOOKUP] = {
1468                 .op_func = (nfsd4op_func)nfsd4_lookup,
1469                 .op_flags = OP_HANDLES_WRONGSEC,
1470                 .op_name = "OP_LOOKUP",
1471         },
1472         [OP_LOOKUPP] = {
1473                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1474                 .op_flags = OP_HANDLES_WRONGSEC,
1475                 .op_name = "OP_LOOKUPP",
1476         },
1477         [OP_NVERIFY] = {
1478                 .op_func = (nfsd4op_func)nfsd4_nverify,
1479                 .op_name = "OP_NVERIFY",
1480         },
1481         [OP_OPEN] = {
1482                 .op_func = (nfsd4op_func)nfsd4_open,
1483                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1484                 .op_name = "OP_OPEN",
1485                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1486         },
1487         [OP_OPEN_CONFIRM] = {
1488                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1489                 .op_flags = OP_MODIFIES_SOMETHING,
1490                 .op_name = "OP_OPEN_CONFIRM",
1491                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1492         },
1493         [OP_OPEN_DOWNGRADE] = {
1494                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1495                 .op_flags = OP_MODIFIES_SOMETHING,
1496                 .op_name = "OP_OPEN_DOWNGRADE",
1497                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1498         },
1499         [OP_PUTFH] = {
1500                 .op_func = (nfsd4op_func)nfsd4_putfh,
1501                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1502                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1503                 .op_name = "OP_PUTFH",
1504                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1505         },
1506         [OP_PUTPUBFH] = {
1507                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1508                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1509                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1510                 .op_name = "OP_PUTPUBFH",
1511                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1512         },
1513         [OP_PUTROOTFH] = {
1514                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1515                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1516                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1517                 .op_name = "OP_PUTROOTFH",
1518                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1519         },
1520         [OP_READ] = {
1521                 .op_func = (nfsd4op_func)nfsd4_read,
1522                 .op_flags = OP_MODIFIES_SOMETHING,
1523                 .op_name = "OP_READ",
1524                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1525         },
1526         [OP_READDIR] = {
1527                 .op_func = (nfsd4op_func)nfsd4_readdir,
1528                 .op_flags = OP_MODIFIES_SOMETHING,
1529                 .op_name = "OP_READDIR",
1530                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1531         },
1532         [OP_READLINK] = {
1533                 .op_func = (nfsd4op_func)nfsd4_readlink,
1534                 .op_name = "OP_READLINK",
1535         },
1536         [OP_REMOVE] = {
1537                 .op_func = (nfsd4op_func)nfsd4_remove,
1538                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1539                 .op_name = "OP_REMOVE",
1540                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1541         },
1542         [OP_RENAME] = {
1543                 .op_func = (nfsd4op_func)nfsd4_rename,
1544                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1545                 .op_name = "OP_RENAME",
1546                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1547         },
1548         [OP_RENEW] = {
1549                 .op_func = (nfsd4op_func)nfsd4_renew,
1550                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1551                                 | OP_MODIFIES_SOMETHING,
1552                 .op_name = "OP_RENEW",
1553                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1554
1555         },
1556         [OP_RESTOREFH] = {
1557                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1558                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1559                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1560                 .op_name = "OP_RESTOREFH",
1561                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1562         },
1563         [OP_SAVEFH] = {
1564                 .op_func = (nfsd4op_func)nfsd4_savefh,
1565                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1566                 .op_name = "OP_SAVEFH",
1567                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1568         },
1569         [OP_SECINFO] = {
1570                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1571                 .op_flags = OP_HANDLES_WRONGSEC,
1572                 .op_name = "OP_SECINFO",
1573         },
1574         [OP_SETATTR] = {
1575                 .op_func = (nfsd4op_func)nfsd4_setattr,
1576                 .op_name = "OP_SETATTR",
1577                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1578                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1579         },
1580         [OP_SETCLIENTID] = {
1581                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1582                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1583                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1584                 .op_name = "OP_SETCLIENTID",
1585                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1586         },
1587         [OP_SETCLIENTID_CONFIRM] = {
1588                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1589                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1590                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1591                 .op_name = "OP_SETCLIENTID_CONFIRM",
1592                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1593         },
1594         [OP_VERIFY] = {
1595                 .op_func = (nfsd4op_func)nfsd4_verify,
1596                 .op_name = "OP_VERIFY",
1597         },
1598         [OP_WRITE] = {
1599                 .op_func = (nfsd4op_func)nfsd4_write,
1600                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1601                 .op_name = "OP_WRITE",
1602                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1603         },
1604         [OP_RELEASE_LOCKOWNER] = {
1605                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1606                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1607                                 | OP_MODIFIES_SOMETHING,
1608                 .op_name = "OP_RELEASE_LOCKOWNER",
1609                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1610         },
1611
1612         /* NFSv4.1 operations */
1613         [OP_EXCHANGE_ID] = {
1614                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1615                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1616                                 | OP_MODIFIES_SOMETHING,
1617                 .op_name = "OP_EXCHANGE_ID",
1618                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1619         },
1620         [OP_BIND_CONN_TO_SESSION] = {
1621                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1622                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1623                                 | OP_MODIFIES_SOMETHING,
1624                 .op_name = "OP_BIND_CONN_TO_SESSION",
1625                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1626         },
1627         [OP_CREATE_SESSION] = {
1628                 .op_func = (nfsd4op_func)nfsd4_create_session,
1629                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1630                                 | OP_MODIFIES_SOMETHING,
1631                 .op_name = "OP_CREATE_SESSION",
1632                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1633         },
1634         [OP_DESTROY_SESSION] = {
1635                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1636                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1637                                 | OP_MODIFIES_SOMETHING,
1638                 .op_name = "OP_DESTROY_SESSION",
1639                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1640         },
1641         [OP_SEQUENCE] = {
1642                 .op_func = (nfsd4op_func)nfsd4_sequence,
1643                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1644                 .op_name = "OP_SEQUENCE",
1645         },
1646         [OP_DESTROY_CLIENTID] = {
1647                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1648                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1649                                 | OP_MODIFIES_SOMETHING,
1650                 .op_name = "OP_DESTROY_CLIENTID",
1651                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1652         },
1653         [OP_RECLAIM_COMPLETE] = {
1654                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1655                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1656                 .op_name = "OP_RECLAIM_COMPLETE",
1657                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1658         },
1659         [OP_SECINFO_NO_NAME] = {
1660                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1661                 .op_flags = OP_HANDLES_WRONGSEC,
1662                 .op_name = "OP_SECINFO_NO_NAME",
1663         },
1664         [OP_TEST_STATEID] = {
1665                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1666                 .op_flags = ALLOWED_WITHOUT_FH,
1667                 .op_name = "OP_TEST_STATEID",
1668         },
1669         [OP_FREE_STATEID] = {
1670                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1671                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1672                 .op_name = "OP_FREE_STATEID",
1673                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1674         },
1675 };
1676
1677 static const char *nfsd4_op_name(unsigned opnum)
1678 {
1679         if (opnum < ARRAY_SIZE(nfsd4_ops))
1680                 return nfsd4_ops[opnum].op_name;
1681         return "unknown_operation";
1682 }
1683
1684 #define nfsd4_voidres                   nfsd4_voidargs
1685 struct nfsd4_voidargs { int dummy; };
1686
1687 static struct svc_procedure             nfsd_procedures4[2] = {
1688         [NFSPROC4_NULL] = {
1689                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1690                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1691                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1692                 .pc_ressize = sizeof(struct nfsd4_voidres),
1693                 .pc_cachetype = RC_NOCACHE,
1694                 .pc_xdrressize = 1,
1695         },
1696         [NFSPROC4_COMPOUND] = {
1697                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1698                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1699                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1700                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1701                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1702                 .pc_release = nfsd4_release_compoundargs,
1703                 .pc_cachetype = RC_NOCACHE,
1704                 .pc_xdrressize = NFSD_BUFSIZE/4,
1705         },
1706 };
1707
1708 struct svc_version      nfsd_version4 = {
1709                 .vs_vers        = 4,
1710                 .vs_nproc       = 2,
1711                 .vs_proc        = nfsd_procedures4,
1712                 .vs_dispatch    = nfsd_dispatch,
1713                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1714 };
1715
1716 /*
1717  * Local variables:
1718  *  c-basic-offset: 8
1719  * End:
1720  */