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         /* Only reclaims from previously confirmed clients are valid */
 270         if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
 271                 return status;
 272
 273         /* We don't know the target directory, and therefore can not
 274         * set the change info
 275         */
 276
 277         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 278
 279         /* set replay cache */
 280         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 281                         &current_fh->fh_handle);
 282
 283         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 284                 (open->op_iattr.ia_size == 0);
 285
 286         status = do_open_permission(rqstp, current_fh, open,
 287                                     NFSD_MAY_OWNER_OVERRIDE);
 288
 289         return status;
 290 }
 291
 292 static void
 293 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 294 {
 295         struct nfsd4_sessionid *sid =
 296                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 297
 298         clid->cl_boot = sid->clientid.cl_boot;
 299         clid->cl_id = sid->clientid.cl_id;
 300 }
 301
 302 static __be32
 303 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 304            struct nfsd4_open *open)
 305 {
 306         __be32 status;
 307         struct nfsd4_compoundres *resp;
 308
 309         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 310                 (int)open->op_fname.len, open->op_fname.data,
 311                 open->op_openowner);
 312
 313         /* This check required by spec. */
 314         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 315                 return nfserr_inval;
 316
 317         /* We don't yet support WANT bits: */
 318         open->op_share_access &= NFS4_SHARE_ACCESS_MASK;
 319
 320         open->op_created = 0;
 321         /*
 322          * RFC5661 18.51.3
 323          * Before RECLAIM_COMPLETE done, server should deny new lock
 324          */
 325         if (nfsd4_has_session(cstate) &&
 326             !cstate->session->se_client->cl_firststate &&
 327             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 328                 return nfserr_grace;
 329
 330         if (nfsd4_has_session(cstate))
 331                 copy_clientid(&open->op_clientid, cstate->session);
 332
 333         nfs4_lock_state();
 334
 335         /* check seqid for replay. set nfs4_owner */
 336         resp = rqstp->rq_resp;
 337         status = nfsd4_process_open1(&resp->cstate, open);
 338         if (status == nfserr_replay_me) {
 339                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 340                 fh_put(&cstate->current_fh);
 341                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 342                                 &rp->rp_openfh);
 343                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 344                 if (status)
 345                         dprintk("nfsd4_open: replay failed"
 346                                 " restoring previous filehandle\n");
 347                 else
 348                         status = nfserr_replay_me;
 349         }
 350         if (status)
 351                 goto out;
 352
 353         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 354         if (status)
 355                 goto out;
 356
 357         /* Openowner is now set, so sequence id will get bumped.  Now we need
 358          * these checks before we do any creates: */
 359         status = nfserr_grace;
 360         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 361                 goto out;
 362         status = nfserr_no_grace;
 363         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 364                 goto out;
 365
 366         switch (open->op_claim_type) {
 367                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 368                 case NFS4_OPEN_CLAIM_NULL:
 369                         status = do_open_lookup(rqstp, &cstate->current_fh,
 370                                                 open);
 371                         if (status)
 372                                 goto out;
 373                         break;
 374                 case NFS4_OPEN_CLAIM_PREVIOUS:
 375                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 376                 case NFS4_OPEN_CLAIM_FH:
 377                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 378                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 379                                                  open);
 380                         if (status)
 381                                 goto out;
 382                         break;
 383                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 384                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 385                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 386                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 387                                 open->op_claim_type);
 388                         status = nfserr_notsupp;
 389                         goto out;
 390                 default:
 391                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 392                                 open->op_claim_type);
 393                         status = nfserr_inval;
 394                         goto out;
 395         }
 396         /*
 397          * nfsd4_process_open2() does the actual opening of the file.  If
 398          * successful, it (1) truncates the file if open->op_truncate was
 399          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 400          */
 401         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 402         WARN_ON(status && open->op_created);
 403 out:
 404         nfsd4_cleanup_open_state(open, status);
 405         if (open->op_openowner)
 406                 cstate->replay_owner = &open->op_openowner->oo_owner;
 407         else
 408                 nfs4_unlock_state();
 409         return status;
 410 }
 411
 412 /*
 413  * filehandle-manipulating ops.
 414  */
 415 static __be32
 416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 417             struct svc_fh **getfh)
 418 {
 419         if (!cstate->current_fh.fh_dentry)
 420                 return nfserr_nofilehandle;
 421
 422         *getfh = &cstate->current_fh;
 423         return nfs_ok;
 424 }
 425
 426 static __be32
 427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 428             struct nfsd4_putfh *putfh)
 429 {
 430         fh_put(&cstate->current_fh);
 431         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 432         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 433                putfh->pf_fhlen);
 434         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 435 }
 436
 437 static __be32
 438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 439                 void *arg)
 440 {
 441         __be32 status;
 442
 443         fh_put(&cstate->current_fh);
 444         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 445         return status;
 446 }
 447
 448 static __be32
 449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 450                 void *arg)
 451 {
 452         if (!cstate->save_fh.fh_dentry)
 453                 return nfserr_restorefh;
 454
 455         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 456         return nfs_ok;
 457 }
 458
 459 static __be32
 460 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 461              void *arg)
 462 {
 463         if (!cstate->current_fh.fh_dentry)
 464                 return nfserr_nofilehandle;
 465
 466         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 467         return nfs_ok;
 468 }
 469
 470 /*
 471  * misc nfsv4 ops
 472  */
 473 static __be32
 474 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 475              struct nfsd4_access *access)
 476 {
 477         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 478                 return nfserr_inval;
 479
 480         access->ac_resp_access = access->ac_req_access;
 481         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 482                            &access->ac_supported);
 483 }
 484
 485 static __be32
 486 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 487              struct nfsd4_commit *commit)
 488 {
 489         u32 *p = (u32 *)commit->co_verf.data;
 490         *p++ = nfssvc_boot.tv_sec;
 491         *p++ = nfssvc_boot.tv_usec;
 492
 493         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 494                              commit->co_count);
 495 }
 496
 497 static __be32
 498 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 499              struct nfsd4_create *create)
 500 {
 501         struct svc_fh resfh;
 502         __be32 status;
 503         dev_t rdev;
 504
 505         fh_init(&resfh, NFS4_FHSIZE);
 506
 507         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 508                            NFSD_MAY_CREATE);
 509         if (status)
 510                 return status;
 511
 512         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 513                                     nfsd_attrmask);
 514         if (status)
 515                 return status;
 516
 517         switch (create->cr_type) {
 518         case NF4LNK:
 519                 /* ugh! we have to null-terminate the linktext, or
 520                  * vfs_symlink() will choke.  it is always safe to
 521                  * null-terminate by brute force, since at worst we
 522                  * will overwrite the first byte of the create namelen
 523                  * in the XDR buffer, which has already been extracted
 524                  * during XDR decode.
 525                  */
 526                 create->cr_linkname[create->cr_linklen] = 0;
 527
 528                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 529                                       create->cr_name, create->cr_namelen,
 530                                       create->cr_linkname, create->cr_linklen,
 531                                       &resfh, &create->cr_iattr);
 532                 break;
 533
 534         case NF4BLK:
 535                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 536                 if (MAJOR(rdev) != create->cr_specdata1 ||
 537                     MINOR(rdev) != create->cr_specdata2)
 538                         return nfserr_inval;
 539                 status = nfsd_create(rqstp, &cstate->current_fh,
 540                                      create->cr_name, create->cr_namelen,
 541                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 542                 break;
 543
 544         case NF4CHR:
 545                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 546                 if (MAJOR(rdev) != create->cr_specdata1 ||
 547                     MINOR(rdev) != create->cr_specdata2)
 548                         return nfserr_inval;
 549                 status = nfsd_create(rqstp, &cstate->current_fh,
 550                                      create->cr_name, create->cr_namelen,
 551                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 552                 break;
 553
 554         case NF4SOCK:
 555                 status = nfsd_create(rqstp, &cstate->current_fh,
 556                                      create->cr_name, create->cr_namelen,
 557                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 558                 break;
 559
 560         case NF4FIFO:
 561                 status = nfsd_create(rqstp, &cstate->current_fh,
 562                                      create->cr_name, create->cr_namelen,
 563                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 564                 break;
 565
 566         case NF4DIR:
 567                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 568                 status = nfsd_create(rqstp, &cstate->current_fh,
 569                                      create->cr_name, create->cr_namelen,
 570                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 571                 break;
 572
 573         default:
 574                 status = nfserr_badtype;
 575         }
 576
 577         if (status)
 578                 goto out;
 579
 580         if (create->cr_acl != NULL)
 581                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 582                                 create->cr_bmval);
 583
 584         fh_unlock(&cstate->current_fh);
 585         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 586         fh_dup2(&cstate->current_fh, &resfh);
 587 out:
 588         fh_put(&resfh);
 589         return status;
 590 }
 591
 592 static __be32
 593 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 594               struct nfsd4_getattr *getattr)
 595 {
 596         __be32 status;
 597
 598         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 599         if (status)
 600                 return status;
 601
 602         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 603                 return nfserr_inval;
 604
 605         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 606         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 607         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 608
 609         getattr->ga_fhp = &cstate->current_fh;
 610         return nfs_ok;
 611 }
 612
 613 static __be32
 614 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 615            struct nfsd4_link *link)
 616 {
 617         __be32 status = nfserr_nofilehandle;
 618
 619         if (!cstate->save_fh.fh_dentry)
 620                 return status;
 621         status = nfsd_link(rqstp, &cstate->current_fh,
 622                            link->li_name, link->li_namelen, &cstate->save_fh);
 623         if (!status)
 624                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 625         return status;
 626 }
 627
 628 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 629 {
 630         struct svc_fh tmp_fh;
 631         __be32 ret;
 632
 633         fh_init(&tmp_fh, NFS4_FHSIZE);
 634         ret = exp_pseudoroot(rqstp, &tmp_fh);
 635         if (ret)
 636                 return ret;
 637         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 638                 fh_put(&tmp_fh);
 639                 return nfserr_noent;
 640         }
 641         fh_put(&tmp_fh);
 642         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 643 }
 644
 645 static __be32
 646 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 647               void *arg)
 648 {
 649         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 650 }
 651
 652 static __be32
 653 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 654              struct nfsd4_lookup *lookup)
 655 {
 656         return nfsd_lookup(rqstp, &cstate->current_fh,
 657                            lookup->lo_name, lookup->lo_len,
 658                            &cstate->current_fh);
 659 }
 660
 661 static __be32
 662 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 663            struct nfsd4_read *read)
 664 {
 665         __be32 status;
 666
 667         /* no need to check permission - this will be done in nfsd_read() */
 668
 669         read->rd_filp = NULL;
 670         if (read->rd_offset >= OFFSET_MAX)
 671                 return nfserr_inval;
 672
 673         nfs4_lock_state();
 674         /* check stateid */
 675         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 676                                                  RD_STATE, &read->rd_filp))) {
 677                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 678                 goto out;
 679         }
 680         if (read->rd_filp)
 681                 get_file(read->rd_filp);
 682         status = nfs_ok;
 683 out:
 684         nfs4_unlock_state();
 685         read->rd_rqstp = rqstp;
 686         read->rd_fhp = &cstate->current_fh;
 687         return status;
 688 }
 689
 690 static __be32
 691 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 692               struct nfsd4_readdir *readdir)
 693 {
 694         u64 cookie = readdir->rd_cookie;
 695         static const nfs4_verifier zeroverf;
 696
 697         /* no need to check permission - this will be done in nfsd_readdir() */
 698
 699         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 700                 return nfserr_inval;
 701
 702         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 703         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 704         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 705
 706         if ((cookie == 1) || (cookie == 2) ||
 707             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 708                 return nfserr_bad_cookie;
 709
 710         readdir->rd_rqstp = rqstp;
 711         readdir->rd_fhp = &cstate->current_fh;
 712         return nfs_ok;
 713 }
 714
 715 static __be32
 716 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 717                struct nfsd4_readlink *readlink)
 718 {
 719         readlink->rl_rqstp = rqstp;
 720         readlink->rl_fhp = &cstate->current_fh;
 721         return nfs_ok;
 722 }
 723
 724 static __be32
 725 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 726              struct nfsd4_remove *remove)
 727 {
 728         __be32 status;
 729
 730         if (locks_in_grace())
 731                 return nfserr_grace;
 732         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 733                              remove->rm_name, remove->rm_namelen);
 734         if (!status) {
 735                 fh_unlock(&cstate->current_fh);
 736                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 737         }
 738         return status;
 739 }
 740
 741 static __be32
 742 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 743              struct nfsd4_rename *rename)
 744 {
 745         __be32 status = nfserr_nofilehandle;
 746
 747         if (!cstate->save_fh.fh_dentry)
 748                 return status;
 749         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 750                                         & NFSEXP_NOSUBTREECHECK))
 751                 return nfserr_grace;
 752         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 753                              rename->rn_snamelen, &cstate->current_fh,
 754                              rename->rn_tname, rename->rn_tnamelen);
 755
 756         /* the underlying filesystem returns different error's than required
 757          * by NFSv4. both save_fh and current_fh have been verified.. */
 758         if (status == nfserr_isdir)
 759                 status = nfserr_exist;
 760         else if ((status == nfserr_notdir) &&
 761                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 762                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 763                 status = nfserr_exist;
 764
 765         if (!status) {
 766                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 767                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 768         }
 769         return status;
 770 }
 771
 772 static __be32
 773 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 774               struct nfsd4_secinfo *secinfo)
 775 {
 776         struct svc_fh resfh;
 777         struct svc_export *exp;
 778         struct dentry *dentry;
 779         __be32 err;
 780
 781         fh_init(&resfh, NFS4_FHSIZE);
 782         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 783         if (err)
 784                 return err;
 785         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 786                                     secinfo->si_name, secinfo->si_namelen,
 787                                     &exp, &dentry);
 788         if (err)
 789                 return err;
 790         if (dentry->d_inode == NULL) {
 791                 exp_put(exp);
 792                 err = nfserr_noent;
 793         } else
 794                 secinfo->si_exp = exp;
 795         dput(dentry);
 796         if (cstate->minorversion)
 797                 /* See rfc 5661 section 2.6.3.1.1.8 */
 798                 fh_put(&cstate->current_fh);
 799         return err;
 800 }
 801
 802 static __be32
 803 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 804               struct nfsd4_secinfo_no_name *sin)
 805 {
 806         __be32 err;
 807
 808         switch (sin->sin_style) {
 809         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 810                 break;
 811         case NFS4_SECINFO_STYLE4_PARENT:
 812                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 813                 if (err)
 814                         return err;
 815                 break;
 816         default:
 817                 return nfserr_inval;
 818         }
 819         exp_get(cstate->current_fh.fh_export);
 820         sin->sin_exp = cstate->current_fh.fh_export;
 821         fh_put(&cstate->current_fh);
 822         return nfs_ok;
 823 }
 824
 825 static __be32
 826 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 827               struct nfsd4_setattr *setattr)
 828 {
 829         __be32 status = nfs_ok;
 830         int err;
 831
 832         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 833                 nfs4_lock_state();
 834                 status = nfs4_preprocess_stateid_op(cstate,
 835                         &setattr->sa_stateid, WR_STATE, NULL);
 836                 nfs4_unlock_state();
 837                 if (status) {
 838                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 839                         return status;
 840                 }
 841         }
 842         err = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
 843         if (err)
 844                 return nfserrno(err);
 845         status = nfs_ok;
 846
 847         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 848                                     nfsd_attrmask);
 849         if (status)
 850                 goto out;
 851
 852         if (setattr->sa_acl != NULL)
 853                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 854                                             setattr->sa_acl);
 855         if (status)
 856                 goto out;
 857         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 858                                 0, (time_t)0);
 859 out:
 860         mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
 861         return status;
 862 }
 863
 864 static __be32
 865 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 866             struct nfsd4_write *write)
 867 {
 868         stateid_t *stateid = &write->wr_stateid;
 869         struct file *filp = NULL;
 870         u32 *p;
 871         __be32 status = nfs_ok;
 872         unsigned long cnt;
 873
 874         /* no need to check permission - this will be done in nfsd_write() */
 875
 876         if (write->wr_offset >= OFFSET_MAX)
 877                 return nfserr_inval;
 878
 879         nfs4_lock_state();
 880         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 881         if (filp)
 882                 get_file(filp);
 883         nfs4_unlock_state();
 884
 885         if (status) {
 886                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 887                 return status;
 888         }
 889
 890         cnt = write->wr_buflen;
 891         write->wr_how_written = write->wr_stable_how;
 892         p = (u32 *)write->wr_verifier.data;
 893         *p++ = nfssvc_boot.tv_sec;
 894         *p++ = nfssvc_boot.tv_usec;
 895
 896         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 897                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 898                              &cnt, &write->wr_how_written);
 899         if (filp)
 900                 fput(filp);
 901
 902         write->wr_bytes_written = cnt;
 903
 904         return status;
 905 }
 906
 907 /* This routine never returns NFS_OK!  If there are no other errors, it
 908  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 909  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 910  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 911  */
 912 static __be32
 913 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 914              struct nfsd4_verify *verify)
 915 {
 916         __be32 *buf, *p;
 917         int count;
 918         __be32 status;
 919
 920         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 921         if (status)
 922                 return status;
 923
 924         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 925         if (status)
 926                 return status;
 927
 928         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 929             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 930                 return nfserr_inval;
 931         if (verify->ve_attrlen & 3)
 932                 return nfserr_inval;
 933
 934         /* count in words:
 935          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 936          */
 937         count = 4 + (verify->ve_attrlen >> 2);
 938         buf = kmalloc(count << 2, GFP_KERNEL);
 939         if (!buf)
 940                 return nfserr_jukebox;
 941
 942         status = nfsd4_encode_fattr(&cstate->current_fh,
 943                                     cstate->current_fh.fh_export,
 944                                     cstate->current_fh.fh_dentry, buf,
 945                                     &count, verify->ve_bmval,
 946                                     rqstp, 0);
 947
 948         /* this means that nfsd4_encode_fattr() ran out of space */
 949         if (status == nfserr_resource && count == 0)
 950                 status = nfserr_not_same;
 951         if (status)
 952                 goto out_kfree;
 953
 954         /* skip bitmap */
 955         p = buf + 1 + ntohl(buf[0]);
 956         status = nfserr_not_same;
 957         if (ntohl(*p++) != verify->ve_attrlen)
 958                 goto out_kfree;
 959         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 960                 status = nfserr_same;
 961
 962 out_kfree:
 963         kfree(buf);
 964         return status;
 965 }
 966
 967 static __be32
 968 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 969               struct nfsd4_verify *verify)
 970 {
 971         __be32 status;
 972
 973         status = _nfsd4_verify(rqstp, cstate, verify);
 974         return status == nfserr_not_same ? nfs_ok : status;
 975 }
 976
 977 static __be32
 978 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 979              struct nfsd4_verify *verify)
 980 {
 981         __be32 status;
 982
 983         status = _nfsd4_verify(rqstp, cstate, verify);
 984         return status == nfserr_same ? nfs_ok : status;
 985 }
 986
 987 /*
 988  * NULL call.
 989  */
 990 static __be32
 991 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 992 {
 993         return nfs_ok;
 994 }
 995
 996 static inline void nfsd4_increment_op_stats(u32 opnum)
 997 {
 998         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
 999                 nfsdstats.nfs4_opcount[opnum]++;
1000 }
1001
1002 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1003                               void *);
1004 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1005
1006 enum nfsd4_op_flags {
1007         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1008         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1009         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1010         /* For rfc 5661 section 2.6.3.1.1: */
1011         OP_HANDLES_WRONGSEC = 1 << 3,
1012         OP_IS_PUTFH_LIKE = 1 << 4,
1013         /*
1014          * These are the ops whose result size we estimate before
1015          * encoding, to avoid performing an op then not being able to
1016          * respond or cache a response.  This includes writes and setattrs
1017          * as well as the operations usually called "nonidempotent":
1018          */
1019         OP_MODIFIES_SOMETHING = 1 << 5,
1020         /*
1021          * Cache compounds containing these ops in the xid-based drc:
1022          * We use the DRC for compounds containing non-idempotent
1023          * operations, *except* those that are 4.1-specific (since
1024          * sessions provide their own EOS), and except for stateful
1025          * operations other than setclientid and setclientid_confirm
1026          * (since sequence numbers provide EOS for open, lock, etc in
1027          * the v4.0 case).
1028          */
1029         OP_CACHEME = 1 << 6,
1030 };
1031
1032 struct nfsd4_operation {
1033         nfsd4op_func op_func;
1034         u32 op_flags;
1035         char *op_name;
1036         /* Try to get response size before operation */
1037         nfsd4op_rsize op_rsize_bop;
1038 };
1039
1040 static struct nfsd4_operation nfsd4_ops[];
1041
1042 static const char *nfsd4_op_name(unsigned opnum);
1043
1044 /*
1045  * Enforce NFSv4.1 COMPOUND ordering rules:
1046  *
1047  * Also note, enforced elsewhere:
1048  *      - SEQUENCE other than as first op results in
1049  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1050  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1051  *        (Enforced in nfsd4_bind_conn_to_session().)
1052  *      - DESTROY_SESSION must be the final operation in a compound, if
1053  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1054  *        (Enforced in nfsd4_destroy_session().)
1055  */
1056 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1057 {
1058         struct nfsd4_op *op = &args->ops[0];
1059
1060         /* These ordering requirements don't apply to NFSv4.0: */
1061         if (args->minorversion == 0)
1062                 return nfs_ok;
1063         /* This is weird, but OK, not our problem: */
1064         if (args->opcnt == 0)
1065                 return nfs_ok;
1066         if (op->status == nfserr_op_illegal)
1067                 return nfs_ok;
1068         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1069                 return nfserr_op_not_in_session;
1070         if (op->opnum == OP_SEQUENCE)
1071                 return nfs_ok;
1072         if (args->opcnt != 1)
1073                 return nfserr_not_only_op;
1074         return nfs_ok;
1075 }
1076
1077 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1078 {
1079         return &nfsd4_ops[op->opnum];
1080 }
1081
1082 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1083 {
1084         return OPDESC(op)->op_flags & OP_CACHEME;
1085 }
1086
1087 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1088 {
1089         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1090         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1091         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1092         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1093         struct nfsd4_operation *thisd;
1094         struct nfsd4_operation *nextd;
1095
1096         thisd = OPDESC(this);
1097         /*
1098          * Most ops check wronsec on our own; only the putfh-like ops
1099          * have special rules.
1100          */
1101         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1102                 return false;
1103         /*
1104          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1105          * put-filehandle operation if we're not going to use the
1106          * result:
1107          */
1108         if (argp->opcnt == resp->opcnt)
1109                 return false;
1110
1111         nextd = OPDESC(next);
1112         /*
1113          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1114          * errors themselves as necessary; others should check for them
1115          * now:
1116          */
1117         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1118 }
1119
1120 /*
1121  * COMPOUND call.
1122  */
1123 static __be32
1124 nfsd4_proc_compound(struct svc_rqst *rqstp,
1125                     struct nfsd4_compoundargs *args,
1126                     struct nfsd4_compoundres *resp)
1127 {
1128         struct nfsd4_op *op;
1129         struct nfsd4_operation *opdesc;
1130         struct nfsd4_compound_state *cstate = &resp->cstate;
1131         int             slack_bytes;
1132         u32             plen = 0;
1133         __be32          status;
1134
1135         resp->xbuf = &rqstp->rq_res;
1136         resp->p = rqstp->rq_res.head[0].iov_base +
1137                                                 rqstp->rq_res.head[0].iov_len;
1138         resp->tagp = resp->p;
1139         /* reserve space for: taglen, tag, and opcnt */
1140         resp->p += 2 + XDR_QUADLEN(args->taglen);
1141         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1142         resp->taglen = args->taglen;
1143         resp->tag = args->tag;
1144         resp->opcnt = 0;
1145         resp->rqstp = rqstp;
1146         resp->cstate.minorversion = args->minorversion;
1147         resp->cstate.replay_owner = NULL;
1148         resp->cstate.session = NULL;
1149         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1150         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1151         /*
1152          * Don't use the deferral mechanism for NFSv4; compounds make it
1153          * too hard to avoid non-idempotency problems.
1154          */
1155         rqstp->rq_usedeferral = 0;
1156
1157         /*
1158          * According to RFC3010, this takes precedence over all other errors.
1159          */
1160         status = nfserr_minor_vers_mismatch;
1161         if (args->minorversion > nfsd_supported_minorversion)
1162                 goto out;
1163
1164         status = nfs41_check_op_ordering(args);
1165         if (status) {
1166                 op = &args->ops[0];
1167                 op->status = status;
1168                 goto encode_op;
1169         }
1170
1171         while (!status && resp->opcnt < args->opcnt) {
1172                 op = &args->ops[resp->opcnt++];
1173
1174                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1175                         resp->opcnt, args->opcnt, op->opnum,
1176                         nfsd4_op_name(op->opnum));
1177                 /*
1178                  * The XDR decode routines may have pre-set op->status;
1179                  * for example, if there is a miscellaneous XDR error
1180                  * it will be set to nfserr_bad_xdr.
1181                  */
1182                 if (op->status)
1183                         goto encode_op;
1184
1185                 /* We must be able to encode a successful response to
1186                  * this operation, with enough room left over to encode a
1187                  * failed response to the next operation.  If we don't
1188                  * have enough room, fail with ERR_RESOURCE.
1189                  */
1190                 slack_bytes = (char *)resp->end - (char *)resp->p;
1191                 if (slack_bytes < COMPOUND_SLACK_SPACE
1192                                 + COMPOUND_ERR_SLACK_SPACE) {
1193                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1194                         op->status = nfserr_resource;
1195                         goto encode_op;
1196                 }
1197
1198                 opdesc = OPDESC(op);
1199
1200                 if (!cstate->current_fh.fh_dentry) {
1201                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1202                                 op->status = nfserr_nofilehandle;
1203                                 goto encode_op;
1204                         }
1205                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1206                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1207                         op->status = nfserr_moved;
1208                         goto encode_op;
1209                 }
1210
1211                 /* If op is non-idempotent */
1212                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1213                         plen = opdesc->op_rsize_bop(rqstp, op);
1214                         op->status = nfsd4_check_resp_size(resp, plen);
1215                 }
1216
1217                 if (op->status)
1218                         goto encode_op;
1219
1220                 if (opdesc->op_func)
1221                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1222                 else
1223                         BUG_ON(op->status == nfs_ok);
1224
1225                 if (!op->status && need_wrongsec_check(rqstp))
1226                         op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1227
1228 encode_op:
1229                 /* Only from SEQUENCE */
1230                 if (resp->cstate.status == nfserr_replay_cache) {
1231                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1232                         status = op->status;
1233                         goto out;
1234                 }
1235                 if (op->status == nfserr_replay_me) {
1236                         op->replay = &cstate->replay_owner->so_replay;
1237                         nfsd4_encode_replay(resp, op);
1238                         status = op->status = op->replay->rp_status;
1239                 } else {
1240                         nfsd4_encode_operation(resp, op);
1241                         status = op->status;
1242                 }
1243
1244                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1245                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1246                         be32_to_cpu(status));
1247
1248                 if (cstate->replay_owner) {
1249                         nfs4_unlock_state();
1250                         cstate->replay_owner = NULL;
1251                 }
1252                 /* XXX Ugh, we need to get rid of this kind of special case: */
1253                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1254                         fput(op->u.read.rd_filp);
1255
1256                 nfsd4_increment_op_stats(op->opnum);
1257         }
1258
1259         resp->cstate.status = status;
1260         fh_put(&resp->cstate.current_fh);
1261         fh_put(&resp->cstate.save_fh);
1262         BUG_ON(resp->cstate.replay_owner);
1263 out:
1264         /* Reset deferral mechanism for RPC deferrals */
1265         rqstp->rq_usedeferral = 1;
1266         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1267         return status;
1268 }
1269
1270 #define op_encode_hdr_size              (2)
1271 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1272 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1273 #define op_encode_change_info_maxsz     (5)
1274 #define nfs4_fattr_bitmap_maxsz         (4)
1275
1276 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1277 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1278
1279 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1280
1281 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1282 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1283                                          op_encode_ace_maxsz)
1284
1285 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1286
1287 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1288 {
1289         return (op_encode_hdr_size) * sizeof(__be32);
1290 }
1291
1292 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1293 {
1294         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1295 }
1296
1297 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1298 {
1299         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1300 }
1301
1302 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1303 {
1304         return (op_encode_hdr_size + op_encode_change_info_maxsz
1305                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1306 }
1307
1308 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1309 {
1310         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1311                 * sizeof(__be32);
1312 }
1313
1314 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1315 {
1316         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1317                 * sizeof(__be32);
1318 }
1319
1320 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1321 {
1322         return (op_encode_hdr_size + op_encode_stateid_maxsz
1323                 + op_encode_change_info_maxsz + 1
1324                 + nfs4_fattr_bitmap_maxsz
1325                 + op_encode_delegation_maxsz) * sizeof(__be32);
1326 }
1327
1328 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329 {
1330         u32 maxcount = 0, rlen = 0;
1331
1332         maxcount = svc_max_payload(rqstp);
1333         rlen = op->u.read.rd_length;
1334
1335         if (rlen > maxcount)
1336                 rlen = maxcount;
1337
1338         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1339 }
1340
1341 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1342 {
1343         u32 rlen = op->u.readdir.rd_maxcount;
1344
1345         if (rlen > PAGE_SIZE)
1346                 rlen = PAGE_SIZE;
1347
1348         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1349                  * sizeof(__be32) + rlen;
1350 }
1351
1352 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1353 {
1354         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1355                 * sizeof(__be32);
1356 }
1357
1358 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1359 {
1360         return (op_encode_hdr_size + op_encode_change_info_maxsz
1361                 + op_encode_change_info_maxsz) * sizeof(__be32);
1362 }
1363
1364 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1365 {
1366         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1367 }
1368
1369 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1370 {
1371         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1372 }
1373
1374 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1375 {
1376         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1377 }
1378
1379 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1380 {
1381         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1382                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1383                 2 + /*eir_server_owner.so_minor_id */\
1384                 /* eir_server_owner.so_major_id<> */\
1385                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1386                 /* eir_server_scope<> */\
1387                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1388                 1 + /* eir_server_impl_id array length */\
1389                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1390 }
1391
1392 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1393 {
1394         return (op_encode_hdr_size + \
1395                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1396                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1397 }
1398
1399 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1400 {
1401         return (op_encode_hdr_size + \
1402                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1403                 2 + /* csr_sequence, csr_flags */\
1404                 op_encode_channel_attrs_maxsz + \
1405                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1406 }
1407
1408 static struct nfsd4_operation nfsd4_ops[] = {
1409         [OP_ACCESS] = {
1410                 .op_func = (nfsd4op_func)nfsd4_access,
1411                 .op_name = "OP_ACCESS",
1412         },
1413         [OP_CLOSE] = {
1414                 .op_func = (nfsd4op_func)nfsd4_close,
1415                 .op_flags = OP_MODIFIES_SOMETHING,
1416                 .op_name = "OP_CLOSE",
1417                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1418         },
1419         [OP_COMMIT] = {
1420                 .op_func = (nfsd4op_func)nfsd4_commit,
1421                 .op_flags = OP_MODIFIES_SOMETHING,
1422                 .op_name = "OP_COMMIT",
1423                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1424         },
1425         [OP_CREATE] = {
1426                 .op_func = (nfsd4op_func)nfsd4_create,
1427                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1428                 .op_name = "OP_CREATE",
1429                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1430         },
1431         [OP_DELEGRETURN] = {
1432                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1433                 .op_flags = OP_MODIFIES_SOMETHING,
1434                 .op_name = "OP_DELEGRETURN",
1435                 .op_rsize_bop = nfsd4_only_status_rsize,
1436         },
1437         [OP_GETATTR] = {
1438                 .op_func = (nfsd4op_func)nfsd4_getattr,
1439                 .op_flags = ALLOWED_ON_ABSENT_FS,
1440                 .op_name = "OP_GETATTR",
1441         },
1442         [OP_GETFH] = {
1443                 .op_func = (nfsd4op_func)nfsd4_getfh,
1444                 .op_name = "OP_GETFH",
1445         },
1446         [OP_LINK] = {
1447                 .op_func = (nfsd4op_func)nfsd4_link,
1448                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1449                                 | OP_CACHEME,
1450                 .op_name = "OP_LINK",
1451                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1452         },
1453         [OP_LOCK] = {
1454                 .op_func = (nfsd4op_func)nfsd4_lock,
1455                 .op_flags = OP_MODIFIES_SOMETHING,
1456                 .op_name = "OP_LOCK",
1457                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1458         },
1459         [OP_LOCKT] = {
1460                 .op_func = (nfsd4op_func)nfsd4_lockt,
1461                 .op_name = "OP_LOCKT",
1462         },
1463         [OP_LOCKU] = {
1464                 .op_func = (nfsd4op_func)nfsd4_locku,
1465                 .op_flags = OP_MODIFIES_SOMETHING,
1466                 .op_name = "OP_LOCKU",
1467                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1468         },
1469         [OP_LOOKUP] = {
1470                 .op_func = (nfsd4op_func)nfsd4_lookup,
1471                 .op_flags = OP_HANDLES_WRONGSEC,
1472                 .op_name = "OP_LOOKUP",
1473         },
1474         [OP_LOOKUPP] = {
1475                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1476                 .op_flags = OP_HANDLES_WRONGSEC,
1477                 .op_name = "OP_LOOKUPP",
1478         },
1479         [OP_NVERIFY] = {
1480                 .op_func = (nfsd4op_func)nfsd4_nverify,
1481                 .op_name = "OP_NVERIFY",
1482         },
1483         [OP_OPEN] = {
1484                 .op_func = (nfsd4op_func)nfsd4_open,
1485                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1486                 .op_name = "OP_OPEN",
1487                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1488         },
1489         [OP_OPEN_CONFIRM] = {
1490                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1491                 .op_flags = OP_MODIFIES_SOMETHING,
1492                 .op_name = "OP_OPEN_CONFIRM",
1493                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1494         },
1495         [OP_OPEN_DOWNGRADE] = {
1496                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1497                 .op_flags = OP_MODIFIES_SOMETHING,
1498                 .op_name = "OP_OPEN_DOWNGRADE",
1499                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1500         },
1501         [OP_PUTFH] = {
1502                 .op_func = (nfsd4op_func)nfsd4_putfh,
1503                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1504                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1505                 .op_name = "OP_PUTFH",
1506                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1507         },
1508         [OP_PUTPUBFH] = {
1509                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1510                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1511                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1512                 .op_name = "OP_PUTPUBFH",
1513                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1514         },
1515         [OP_PUTROOTFH] = {
1516                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1517                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1518                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1519                 .op_name = "OP_PUTROOTFH",
1520                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1521         },
1522         [OP_READ] = {
1523                 .op_func = (nfsd4op_func)nfsd4_read,
1524                 .op_flags = OP_MODIFIES_SOMETHING,
1525                 .op_name = "OP_READ",
1526                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1527         },
1528         [OP_READDIR] = {
1529                 .op_func = (nfsd4op_func)nfsd4_readdir,
1530                 .op_flags = OP_MODIFIES_SOMETHING,
1531                 .op_name = "OP_READDIR",
1532                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1533         },
1534         [OP_READLINK] = {
1535                 .op_func = (nfsd4op_func)nfsd4_readlink,
1536                 .op_name = "OP_READLINK",
1537         },
1538         [OP_REMOVE] = {
1539                 .op_func = (nfsd4op_func)nfsd4_remove,
1540                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1541                 .op_name = "OP_REMOVE",
1542                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1543         },
1544         [OP_RENAME] = {
1545                 .op_func = (nfsd4op_func)nfsd4_rename,
1546                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1547                 .op_name = "OP_RENAME",
1548                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1549         },
1550         [OP_RENEW] = {
1551                 .op_func = (nfsd4op_func)nfsd4_renew,
1552                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1553                                 | OP_MODIFIES_SOMETHING,
1554                 .op_name = "OP_RENEW",
1555                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1556
1557         },
1558         [OP_RESTOREFH] = {
1559                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1560                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1561                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1562                 .op_name = "OP_RESTOREFH",
1563                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1564         },
1565         [OP_SAVEFH] = {
1566                 .op_func = (nfsd4op_func)nfsd4_savefh,
1567                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1568                 .op_name = "OP_SAVEFH",
1569                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1570         },
1571         [OP_SECINFO] = {
1572                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1573                 .op_flags = OP_HANDLES_WRONGSEC,
1574                 .op_name = "OP_SECINFO",
1575         },
1576         [OP_SETATTR] = {
1577                 .op_func = (nfsd4op_func)nfsd4_setattr,
1578                 .op_name = "OP_SETATTR",
1579                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1580                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1581         },
1582         [OP_SETCLIENTID] = {
1583                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1584                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1585                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1586                 .op_name = "OP_SETCLIENTID",
1587                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1588         },
1589         [OP_SETCLIENTID_CONFIRM] = {
1590                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1591                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1592                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1593                 .op_name = "OP_SETCLIENTID_CONFIRM",
1594                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1595         },
1596         [OP_VERIFY] = {
1597                 .op_func = (nfsd4op_func)nfsd4_verify,
1598                 .op_name = "OP_VERIFY",
1599         },
1600         [OP_WRITE] = {
1601                 .op_func = (nfsd4op_func)nfsd4_write,
1602                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1603                 .op_name = "OP_WRITE",
1604                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1605         },
1606         [OP_RELEASE_LOCKOWNER] = {
1607                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1608                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1609                                 | OP_MODIFIES_SOMETHING,
1610                 .op_name = "OP_RELEASE_LOCKOWNER",
1611                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1612         },
1613
1614         /* NFSv4.1 operations */
1615         [OP_EXCHANGE_ID] = {
1616                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1617                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1618                                 | OP_MODIFIES_SOMETHING,
1619                 .op_name = "OP_EXCHANGE_ID",
1620                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1621         },
1622         [OP_BIND_CONN_TO_SESSION] = {
1623                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1624                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1625                                 | OP_MODIFIES_SOMETHING,
1626                 .op_name = "OP_BIND_CONN_TO_SESSION",
1627                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1628         },
1629         [OP_CREATE_SESSION] = {
1630                 .op_func = (nfsd4op_func)nfsd4_create_session,
1631                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1632                                 | OP_MODIFIES_SOMETHING,
1633                 .op_name = "OP_CREATE_SESSION",
1634                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1635         },
1636         [OP_DESTROY_SESSION] = {
1637                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1638                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1639                                 | OP_MODIFIES_SOMETHING,
1640                 .op_name = "OP_DESTROY_SESSION",
1641                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1642         },
1643         [OP_SEQUENCE] = {
1644                 .op_func = (nfsd4op_func)nfsd4_sequence,
1645                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1646                 .op_name = "OP_SEQUENCE",
1647         },
1648         [OP_DESTROY_CLIENTID] = {
1649                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1650                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1651                                 | OP_MODIFIES_SOMETHING,
1652                 .op_name = "OP_DESTROY_CLIENTID",
1653                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1654         },
1655         [OP_RECLAIM_COMPLETE] = {
1656                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1657                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1658                 .op_name = "OP_RECLAIM_COMPLETE",
1659                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1660         },
1661         [OP_SECINFO_NO_NAME] = {
1662                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1663                 .op_flags = OP_HANDLES_WRONGSEC,
1664                 .op_name = "OP_SECINFO_NO_NAME",
1665         },
1666         [OP_TEST_STATEID] = {
1667                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1668                 .op_flags = ALLOWED_WITHOUT_FH,
1669                 .op_name = "OP_TEST_STATEID",
1670         },
1671         [OP_FREE_STATEID] = {
1672                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1673                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1674                 .op_name = "OP_FREE_STATEID",
1675                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1676         },
1677 };
1678
1679 static const char *nfsd4_op_name(unsigned opnum)
1680 {
1681         if (opnum < ARRAY_SIZE(nfsd4_ops))
1682                 return nfsd4_ops[opnum].op_name;
1683         return "unknown_operation";
1684 }
1685
1686 #define nfsd4_voidres                   nfsd4_voidargs
1687 struct nfsd4_voidargs { int dummy; };
1688
1689 static struct svc_procedure             nfsd_procedures4[2] = {
1690         [NFSPROC4_NULL] = {
1691                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1692                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1693                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1694                 .pc_ressize = sizeof(struct nfsd4_voidres),
1695                 .pc_cachetype = RC_NOCACHE,
1696                 .pc_xdrressize = 1,
1697         },
1698         [NFSPROC4_COMPOUND] = {
1699                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1700                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1701                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1702                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1703                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1704                 .pc_release = nfsd4_release_compoundargs,
1705                 .pc_cachetype = RC_NOCACHE,
1706                 .pc_xdrressize = NFSD_BUFSIZE/4,
1707         },
1708 };
1709
1710 struct svc_version      nfsd_version4 = {
1711                 .vs_vers        = 4,
1712                 .vs_nproc       = 2,
1713                 .vs_proc        = nfsd_procedures4,
1714                 .vs_dispatch    = nfsd_dispatch,
1715                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1716 };
1717
1718 /*
1719  * Local variables:
1720  *  c-basic-offset: 8
1721  * End:
1722  */