Pileus Git - ~andy/linux/blob - 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 #include "current_stateid.h"
  43
  44 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  45
  46 static u32 nfsd_attrmask[] = {
  47         NFSD_WRITEABLE_ATTRS_WORD0,
  48         NFSD_WRITEABLE_ATTRS_WORD1,
  49         NFSD_WRITEABLE_ATTRS_WORD2
  50 };
  51
  52 static u32 nfsd41_ex_attrmask[] = {
  53         NFSD_SUPPATTR_EXCLCREAT_WORD0,
  54         NFSD_SUPPATTR_EXCLCREAT_WORD1,
  55         NFSD_SUPPATTR_EXCLCREAT_WORD2
  56 };
  57
  58 static __be32
  59 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  60                    u32 *bmval, u32 *writable)
  61 {
  62         struct dentry *dentry = cstate->current_fh.fh_dentry;
  63
  64         /*
  65          * Check about attributes are supported by the NFSv4 server or not.
  66          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  67          */
  68         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  69             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  70             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  71                 return nfserr_attrnotsupp;
  72
  73         /*
  74          * Check FATTR4_WORD0_ACL can be supported
  75          * in current environment or not.
  76          */
  77         if (bmval[0] & FATTR4_WORD0_ACL) {
  78                 if (!IS_POSIXACL(dentry->d_inode))
  79                         return nfserr_attrnotsupp;
  80         }
  81
  82         /*
  83          * According to spec, read-only attributes return ERR_INVAL.
  84          */
  85         if (writable) {
  86                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  87                     (bmval[2] & ~writable[2]))
  88                         return nfserr_inval;
  89         }
  90
  91         return nfs_ok;
  92 }
  93
  94 static __be32
  95 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
  96         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
  97 {
  98         __be32 status = nfs_ok;
  99
 100         if (open->op_create == NFS4_OPEN_CREATE) {
 101                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
 102                     || open->op_createmode == NFS4_CREATE_GUARDED)
 103                         status = check_attr_support(rqstp, cstate,
 104                                         open->op_bmval, nfsd_attrmask);
 105                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 106                         status = check_attr_support(rqstp, cstate,
 107                                         open->op_bmval, nfsd41_ex_attrmask);
 108         }
 109
 110         return status;
 111 }
 112
 113 static int
 114 is_create_with_attrs(struct nfsd4_open *open)
 115 {
 116         return open->op_create == NFS4_OPEN_CREATE
 117                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
 118                     || open->op_createmode == NFS4_CREATE_GUARDED
 119                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 120 }
 121
 122 /*
 123  * if error occurs when setting the acl, just clear the acl bit
 124  * in the returned attr bitmap.
 125  */
 126 static void
 127 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 128                 struct nfs4_acl *acl, u32 *bmval)
 129 {
 130         __be32 status;
 131
 132         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 133         if (status)
 134                 /*
 135                  * We should probably fail the whole open at this point,
 136                  * but we've already created the file, so it's too late;
 137                  * So this seems the least of evils:
 138                  */
 139                 bmval[0] &= ~FATTR4_WORD0_ACL;
 140 }
 141
 142 static inline void
 143 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 144 {
 145         fh_put(dst);
 146         dget(src->fh_dentry);
 147         if (src->fh_export)
 148                 cache_get(&src->fh_export->h);
 149         *dst = *src;
 150 }
 151
 152 static __be32
 153 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 154 {
 155         __be32 status;
 156
 157         if (open->op_truncate &&
 158                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 159                 return nfserr_inval;
 160
 161         accmode |= NFSD_MAY_READ_IF_EXEC;
 162
 163         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 164                 accmode |= NFSD_MAY_READ;
 165         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 166                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 167         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 168                 accmode |= NFSD_MAY_WRITE;
 169
 170         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 171
 172         return status;
 173 }
 174
 175 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 176 {
 177         umode_t mode = fh->fh_dentry->d_inode->i_mode;
 178
 179         if (S_ISREG(mode))
 180                 return nfs_ok;
 181         if (S_ISDIR(mode))
 182                 return nfserr_isdir;
 183         /*
 184          * Using err_symlink as our catch-all case may look odd; but
 185          * there's no other obvious error for this case in 4.0, and we
 186          * happen to know that it will cause the linux v4 client to do
 187          * the right thing on attempts to open something other than a
 188          * regular file.
 189          */
 190         return nfserr_symlink;
 191 }
 192
 193 static __be32
 194 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 195 {
 196         struct svc_fh *resfh;
 197         __be32 status;
 198
 199         resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 200         if (!resfh)
 201                 return nfserr_jukebox;
 202         fh_init(resfh, NFS4_FHSIZE);
 203         open->op_truncate = 0;
 204
 205         if (open->op_create) {
 206                 /* FIXME: check session persistence and pnfs flags.
 207                  * The nfsv4.1 spec requires the following semantics:
 208                  *
 209                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 210                  * Reply Cache  | server |                 |
 211                  * -------------+--------+-----------------+--------------------
 212                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 213                  *              |        |                 | (SHOULD)
 214                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 215                  *              |        |                 | (SHOULD NOT)
 216                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 217                  * yes          | no     | GUARDED4        | GUARDED4
 218                  * yes          | yes    | GUARDED4        | GUARDED4
 219                  */
 220
 221                 /*
 222                  * Note: create modes (UNCHECKED,GUARDED...) are the same
 223                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
 224                  */
 225                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 226                                         open->op_fname.len, &open->op_iattr,
 227                                         resfh, open->op_createmode,
 228                                         (u32 *)open->op_verf.data,
 229                                         &open->op_truncate, &open->op_created);
 230
 231                 /*
 232                  * Following rfc 3530 14.2.16, use the returned bitmask
 233                  * to indicate which attributes we used to store the
 234                  * verifier:
 235                  */
 236                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 237                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 238                                                 FATTR4_WORD1_TIME_MODIFY);
 239         } else {
 240                 status = nfsd_lookup(rqstp, current_fh,
 241                                      open->op_fname.data, open->op_fname.len, resfh);
 242                 fh_unlock(current_fh);
 243                 if (status)
 244                         goto out;
 245                 status = nfsd_check_obj_isreg(resfh);
 246         }
 247         if (status)
 248                 goto out;
 249
 250         if (is_create_with_attrs(open) && open->op_acl != NULL)
 251                 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
 252
 253         /* set reply cache */
 254         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 255                         &resfh->fh_handle);
 256         if (!open->op_created)
 257                 status = do_open_permission(rqstp, resfh, open,
 258                                             NFSD_MAY_NOP);
 259         set_change_info(&open->op_cinfo, current_fh);
 260         fh_dup2(current_fh, resfh);
 261 out:
 262         fh_put(resfh);
 263         kfree(resfh);
 264         return status;
 265 }
 266
 267 static __be32
 268 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 269 {
 270         __be32 status;
 271
 272         /* We don't know the target directory, and therefore can not
 273         * set the change info
 274         */
 275
 276         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 277
 278         /* set replay cache */
 279         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 280                         &current_fh->fh_handle);
 281
 282         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 283                 (open->op_iattr.ia_size == 0);
 284
 285         status = do_open_permission(rqstp, current_fh, open,
 286                                     NFSD_MAY_OWNER_OVERRIDE);
 287
 288         return status;
 289 }
 290
 291 static void
 292 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 293 {
 294         struct nfsd4_sessionid *sid =
 295                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 296
 297         clid->cl_boot = sid->clientid.cl_boot;
 298         clid->cl_id = sid->clientid.cl_id;
 299 }
 300
 301 static __be32
 302 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 303            struct nfsd4_open *open)
 304 {
 305         __be32 status;
 306         struct nfsd4_compoundres *resp;
 307
 308         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 309                 (int)open->op_fname.len, open->op_fname.data,
 310                 open->op_openowner);
 311
 312         /* This check required by spec. */
 313         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 314                 return nfserr_inval;
 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         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 456                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 457                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 458         }
 459         return nfs_ok;
 460 }
 461
 462 static __be32
 463 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 464              void *arg)
 465 {
 466         if (!cstate->current_fh.fh_dentry)
 467                 return nfserr_nofilehandle;
 468
 469         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 470         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 471                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 472                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 473         }
 474         return nfs_ok;
 475 }
 476
 477 /*
 478  * misc nfsv4 ops
 479  */
 480 static __be32
 481 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 482              struct nfsd4_access *access)
 483 {
 484         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 485                 return nfserr_inval;
 486
 487         access->ac_resp_access = access->ac_req_access;
 488         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 489                            &access->ac_supported);
 490 }
 491
 492 static void gen_boot_verifier(nfs4_verifier *verifier)
 493 {
 494         __be32 verf[2];
 495
 496         verf[0] = (__be32)nfssvc_boot.tv_sec;
 497         verf[1] = (__be32)nfssvc_boot.tv_usec;
 498         memcpy(verifier->data, verf, sizeof(verifier->data));
 499 }
 500
 501 static __be32
 502 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 503              struct nfsd4_commit *commit)
 504 {
 505         gen_boot_verifier(&commit->co_verf);
 506         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 507                              commit->co_count);
 508 }
 509
 510 static __be32
 511 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 512              struct nfsd4_create *create)
 513 {
 514         struct svc_fh resfh;
 515         __be32 status;
 516         dev_t rdev;
 517
 518         fh_init(&resfh, NFS4_FHSIZE);
 519
 520         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 521                            NFSD_MAY_CREATE);
 522         if (status)
 523                 return status;
 524
 525         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 526                                     nfsd_attrmask);
 527         if (status)
 528                 return status;
 529
 530         switch (create->cr_type) {
 531         case NF4LNK:
 532                 /* ugh! we have to null-terminate the linktext, or
 533                  * vfs_symlink() will choke.  it is always safe to
 534                  * null-terminate by brute force, since at worst we
 535                  * will overwrite the first byte of the create namelen
 536                  * in the XDR buffer, which has already been extracted
 537                  * during XDR decode.
 538                  */
 539                 create->cr_linkname[create->cr_linklen] = 0;
 540
 541                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 542                                       create->cr_name, create->cr_namelen,
 543                                       create->cr_linkname, create->cr_linklen,
 544                                       &resfh, &create->cr_iattr);
 545                 break;
 546
 547         case NF4BLK:
 548                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 549                 if (MAJOR(rdev) != create->cr_specdata1 ||
 550                     MINOR(rdev) != create->cr_specdata2)
 551                         return nfserr_inval;
 552                 status = nfsd_create(rqstp, &cstate->current_fh,
 553                                      create->cr_name, create->cr_namelen,
 554                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 555                 break;
 556
 557         case NF4CHR:
 558                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 559                 if (MAJOR(rdev) != create->cr_specdata1 ||
 560                     MINOR(rdev) != create->cr_specdata2)
 561                         return nfserr_inval;
 562                 status = nfsd_create(rqstp, &cstate->current_fh,
 563                                      create->cr_name, create->cr_namelen,
 564                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 565                 break;
 566
 567         case NF4SOCK:
 568                 status = nfsd_create(rqstp, &cstate->current_fh,
 569                                      create->cr_name, create->cr_namelen,
 570                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 571                 break;
 572
 573         case NF4FIFO:
 574                 status = nfsd_create(rqstp, &cstate->current_fh,
 575                                      create->cr_name, create->cr_namelen,
 576                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 577                 break;
 578
 579         case NF4DIR:
 580                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 581                 status = nfsd_create(rqstp, &cstate->current_fh,
 582                                      create->cr_name, create->cr_namelen,
 583                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 584                 break;
 585
 586         default:
 587                 status = nfserr_badtype;
 588         }
 589
 590         if (status)
 591                 goto out;
 592
 593         if (create->cr_acl != NULL)
 594                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 595                                 create->cr_bmval);
 596
 597         fh_unlock(&cstate->current_fh);
 598         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 599         fh_dup2(&cstate->current_fh, &resfh);
 600 out:
 601         fh_put(&resfh);
 602         return status;
 603 }
 604
 605 static __be32
 606 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 607               struct nfsd4_getattr *getattr)
 608 {
 609         __be32 status;
 610
 611         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 612         if (status)
 613                 return status;
 614
 615         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 616                 return nfserr_inval;
 617
 618         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 619         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 620         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 621
 622         getattr->ga_fhp = &cstate->current_fh;
 623         return nfs_ok;
 624 }
 625
 626 static __be32
 627 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 628            struct nfsd4_link *link)
 629 {
 630         __be32 status = nfserr_nofilehandle;
 631
 632         if (!cstate->save_fh.fh_dentry)
 633                 return status;
 634         status = nfsd_link(rqstp, &cstate->current_fh,
 635                            link->li_name, link->li_namelen, &cstate->save_fh);
 636         if (!status)
 637                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 638         return status;
 639 }
 640
 641 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 642 {
 643         struct svc_fh tmp_fh;
 644         __be32 ret;
 645
 646         fh_init(&tmp_fh, NFS4_FHSIZE);
 647         ret = exp_pseudoroot(rqstp, &tmp_fh);
 648         if (ret)
 649                 return ret;
 650         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 651                 fh_put(&tmp_fh);
 652                 return nfserr_noent;
 653         }
 654         fh_put(&tmp_fh);
 655         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 656 }
 657
 658 static __be32
 659 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 660               void *arg)
 661 {
 662         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 663 }
 664
 665 static __be32
 666 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 667              struct nfsd4_lookup *lookup)
 668 {
 669         return nfsd_lookup(rqstp, &cstate->current_fh,
 670                            lookup->lo_name, lookup->lo_len,
 671                            &cstate->current_fh);
 672 }
 673
 674 static __be32
 675 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 676            struct nfsd4_read *read)
 677 {
 678         __be32 status;
 679
 680         /* no need to check permission - this will be done in nfsd_read() */
 681
 682         read->rd_filp = NULL;
 683         if (read->rd_offset >= OFFSET_MAX)
 684                 return nfserr_inval;
 685
 686         nfs4_lock_state();
 687         /* check stateid */
 688         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 689                                                  RD_STATE, &read->rd_filp))) {
 690                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 691                 goto out;
 692         }
 693         if (read->rd_filp)
 694                 get_file(read->rd_filp);
 695         status = nfs_ok;
 696 out:
 697         nfs4_unlock_state();
 698         read->rd_rqstp = rqstp;
 699         read->rd_fhp = &cstate->current_fh;
 700         return status;
 701 }
 702
 703 static __be32
 704 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 705               struct nfsd4_readdir *readdir)
 706 {
 707         u64 cookie = readdir->rd_cookie;
 708         static const nfs4_verifier zeroverf;
 709
 710         /* no need to check permission - this will be done in nfsd_readdir() */
 711
 712         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 713                 return nfserr_inval;
 714
 715         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 716         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 717         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 718
 719         if ((cookie == 1) || (cookie == 2) ||
 720             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 721                 return nfserr_bad_cookie;
 722
 723         readdir->rd_rqstp = rqstp;
 724         readdir->rd_fhp = &cstate->current_fh;
 725         return nfs_ok;
 726 }
 727
 728 static __be32
 729 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 730                struct nfsd4_readlink *readlink)
 731 {
 732         readlink->rl_rqstp = rqstp;
 733         readlink->rl_fhp = &cstate->current_fh;
 734         return nfs_ok;
 735 }
 736
 737 static __be32
 738 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 739              struct nfsd4_remove *remove)
 740 {
 741         __be32 status;
 742
 743         if (locks_in_grace())
 744                 return nfserr_grace;
 745         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 746                              remove->rm_name, remove->rm_namelen);
 747         if (!status) {
 748                 fh_unlock(&cstate->current_fh);
 749                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 750         }
 751         return status;
 752 }
 753
 754 static __be32
 755 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 756              struct nfsd4_rename *rename)
 757 {
 758         __be32 status = nfserr_nofilehandle;
 759
 760         if (!cstate->save_fh.fh_dentry)
 761                 return status;
 762         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 763                                         & NFSEXP_NOSUBTREECHECK))
 764                 return nfserr_grace;
 765         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 766                              rename->rn_snamelen, &cstate->current_fh,
 767                              rename->rn_tname, rename->rn_tnamelen);
 768
 769         /* the underlying filesystem returns different error's than required
 770          * by NFSv4. both save_fh and current_fh have been verified.. */
 771         if (status == nfserr_isdir)
 772                 status = nfserr_exist;
 773         else if ((status == nfserr_notdir) &&
 774                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 775                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 776                 status = nfserr_exist;
 777
 778         if (!status) {
 779                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 780                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 781         }
 782         return status;
 783 }
 784
 785 static __be32
 786 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 787               struct nfsd4_secinfo *secinfo)
 788 {
 789         struct svc_fh resfh;
 790         struct svc_export *exp;
 791         struct dentry *dentry;
 792         __be32 err;
 793
 794         fh_init(&resfh, NFS4_FHSIZE);
 795         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 796         if (err)
 797                 return err;
 798         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 799                                     secinfo->si_name, secinfo->si_namelen,
 800                                     &exp, &dentry);
 801         if (err)
 802                 return err;
 803         if (dentry->d_inode == NULL) {
 804                 exp_put(exp);
 805                 err = nfserr_noent;
 806         } else
 807                 secinfo->si_exp = exp;
 808         dput(dentry);
 809         if (cstate->minorversion)
 810                 /* See rfc 5661 section 2.6.3.1.1.8 */
 811                 fh_put(&cstate->current_fh);
 812         return err;
 813 }
 814
 815 static __be32
 816 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 817               struct nfsd4_secinfo_no_name *sin)
 818 {
 819         __be32 err;
 820
 821         switch (sin->sin_style) {
 822         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 823                 break;
 824         case NFS4_SECINFO_STYLE4_PARENT:
 825                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 826                 if (err)
 827                         return err;
 828                 break;
 829         default:
 830                 return nfserr_inval;
 831         }
 832         exp_get(cstate->current_fh.fh_export);
 833         sin->sin_exp = cstate->current_fh.fh_export;
 834         fh_put(&cstate->current_fh);
 835         return nfs_ok;
 836 }
 837
 838 static __be32
 839 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 840               struct nfsd4_setattr *setattr)
 841 {
 842         __be32 status = nfs_ok;
 843
 844         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 845                 nfs4_lock_state();
 846                 status = nfs4_preprocess_stateid_op(cstate,
 847                         &setattr->sa_stateid, WR_STATE, NULL);
 848                 nfs4_unlock_state();
 849                 if (status) {
 850                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 851                         return status;
 852                 }
 853         }
 854         status = fh_want_write(&cstate->current_fh);
 855         if (status)
 856                 return status;
 857         status = nfs_ok;
 858
 859         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 860                                     nfsd_attrmask);
 861         if (status)
 862                 goto out;
 863
 864         if (setattr->sa_acl != NULL)
 865                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 866                                             setattr->sa_acl);
 867         if (status)
 868                 goto out;
 869         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 870                                 0, (time_t)0);
 871 out:
 872         fh_drop_write(&cstate->current_fh);
 873         return status;
 874 }
 875
 876 static __be32
 877 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 878             struct nfsd4_write *write)
 879 {
 880         stateid_t *stateid = &write->wr_stateid;
 881         struct file *filp = NULL;
 882         __be32 status = nfs_ok;
 883         unsigned long cnt;
 884
 885         /* no need to check permission - this will be done in nfsd_write() */
 886
 887         if (write->wr_offset >= OFFSET_MAX)
 888                 return nfserr_inval;
 889
 890         nfs4_lock_state();
 891         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 892         if (filp)
 893                 get_file(filp);
 894         nfs4_unlock_state();
 895
 896         if (status) {
 897                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 898                 return status;
 899         }
 900
 901         cnt = write->wr_buflen;
 902         write->wr_how_written = write->wr_stable_how;
 903         gen_boot_verifier(&write->wr_verifier);
 904
 905         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 906                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 907                              &cnt, &write->wr_how_written);
 908         if (filp)
 909                 fput(filp);
 910
 911         write->wr_bytes_written = cnt;
 912
 913         return status;
 914 }
 915
 916 /* This routine never returns NFS_OK!  If there are no other errors, it
 917  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 918  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 919  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 920  */
 921 static __be32
 922 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 923              struct nfsd4_verify *verify)
 924 {
 925         __be32 *buf, *p;
 926         int count;
 927         __be32 status;
 928
 929         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 930         if (status)
 931                 return status;
 932
 933         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 934         if (status)
 935                 return status;
 936
 937         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 938             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 939                 return nfserr_inval;
 940         if (verify->ve_attrlen & 3)
 941                 return nfserr_inval;
 942
 943         /* count in words:
 944          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 945          */
 946         count = 4 + (verify->ve_attrlen >> 2);
 947         buf = kmalloc(count << 2, GFP_KERNEL);
 948         if (!buf)
 949                 return nfserr_jukebox;
 950
 951         status = nfsd4_encode_fattr(&cstate->current_fh,
 952                                     cstate->current_fh.fh_export,
 953                                     cstate->current_fh.fh_dentry, buf,
 954                                     &count, verify->ve_bmval,
 955                                     rqstp, 0);
 956
 957         /* this means that nfsd4_encode_fattr() ran out of space */
 958         if (status == nfserr_resource && count == 0)
 959                 status = nfserr_not_same;
 960         if (status)
 961                 goto out_kfree;
 962
 963         /* skip bitmap */
 964         p = buf + 1 + ntohl(buf[0]);
 965         status = nfserr_not_same;
 966         if (ntohl(*p++) != verify->ve_attrlen)
 967                 goto out_kfree;
 968         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 969                 status = nfserr_same;
 970
 971 out_kfree:
 972         kfree(buf);
 973         return status;
 974 }
 975
 976 static __be32
 977 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 978               struct nfsd4_verify *verify)
 979 {
 980         __be32 status;
 981
 982         status = _nfsd4_verify(rqstp, cstate, verify);
 983         return status == nfserr_not_same ? nfs_ok : status;
 984 }
 985
 986 static __be32
 987 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 988              struct nfsd4_verify *verify)
 989 {
 990         __be32 status;
 991
 992         status = _nfsd4_verify(rqstp, cstate, verify);
 993         return status == nfserr_same ? nfs_ok : status;
 994 }
 995
 996 /*
 997  * NULL call.
 998  */
 999 static __be32
1000 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1001 {
1002         return nfs_ok;
1003 }
1004
1005 static inline void nfsd4_increment_op_stats(u32 opnum)
1006 {
1007         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1008                 nfsdstats.nfs4_opcount[opnum]++;
1009 }
1010
1011 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1012                               void *);
1013 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1014 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1015 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1016
1017 enum nfsd4_op_flags {
1018         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1019         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1020         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1021         /* For rfc 5661 section 2.6.3.1.1: */
1022         OP_HANDLES_WRONGSEC = 1 << 3,
1023         OP_IS_PUTFH_LIKE = 1 << 4,
1024         /*
1025          * These are the ops whose result size we estimate before
1026          * encoding, to avoid performing an op then not being able to
1027          * respond or cache a response.  This includes writes and setattrs
1028          * as well as the operations usually called "nonidempotent":
1029          */
1030         OP_MODIFIES_SOMETHING = 1 << 5,
1031         /*
1032          * Cache compounds containing these ops in the xid-based drc:
1033          * We use the DRC for compounds containing non-idempotent
1034          * operations, *except* those that are 4.1-specific (since
1035          * sessions provide their own EOS), and except for stateful
1036          * operations other than setclientid and setclientid_confirm
1037          * (since sequence numbers provide EOS for open, lock, etc in
1038          * the v4.0 case).
1039          */
1040         OP_CACHEME = 1 << 6,
1041         /*
1042          * These are ops which clear current state id.
1043          */
1044         OP_CLEAR_STATEID = 1 << 7,
1045 };
1046
1047 struct nfsd4_operation {
1048         nfsd4op_func op_func;
1049         u32 op_flags;
1050         char *op_name;
1051         /* Try to get response size before operation */
1052         nfsd4op_rsize op_rsize_bop;
1053         stateid_setter op_get_currentstateid;
1054         stateid_getter op_set_currentstateid;
1055 };
1056
1057 static struct nfsd4_operation nfsd4_ops[];
1058
1059 #ifdef NFSD_DEBUG
1060 static const char *nfsd4_op_name(unsigned opnum);
1061 #endif
1062
1063 /*
1064  * Enforce NFSv4.1 COMPOUND ordering rules:
1065  *
1066  * Also note, enforced elsewhere:
1067  *      - SEQUENCE other than as first op results in
1068  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1069  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1070  *        (Enforced in nfsd4_bind_conn_to_session().)
1071  *      - DESTROY_SESSION must be the final operation in a compound, if
1072  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1073  *        (Enforced in nfsd4_destroy_session().)
1074  */
1075 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1076 {
1077         struct nfsd4_op *op = &args->ops[0];
1078
1079         /* These ordering requirements don't apply to NFSv4.0: */
1080         if (args->minorversion == 0)
1081                 return nfs_ok;
1082         /* This is weird, but OK, not our problem: */
1083         if (args->opcnt == 0)
1084                 return nfs_ok;
1085         if (op->status == nfserr_op_illegal)
1086                 return nfs_ok;
1087         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1088                 return nfserr_op_not_in_session;
1089         if (op->opnum == OP_SEQUENCE)
1090                 return nfs_ok;
1091         if (args->opcnt != 1)
1092                 return nfserr_not_only_op;
1093         return nfs_ok;
1094 }
1095
1096 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1097 {
1098         return &nfsd4_ops[op->opnum];
1099 }
1100
1101 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1102 {
1103         return OPDESC(op)->op_flags & OP_CACHEME;
1104 }
1105
1106 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1107 {
1108         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1109         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1110         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1111         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1112         struct nfsd4_operation *thisd;
1113         struct nfsd4_operation *nextd;
1114
1115         thisd = OPDESC(this);
1116         /*
1117          * Most ops check wronsec on our own; only the putfh-like ops
1118          * have special rules.
1119          */
1120         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1121                 return false;
1122         /*
1123          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1124          * put-filehandle operation if we're not going to use the
1125          * result:
1126          */
1127         if (argp->opcnt == resp->opcnt)
1128                 return false;
1129
1130         nextd = OPDESC(next);
1131         /*
1132          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1133          * errors themselves as necessary; others should check for them
1134          * now:
1135          */
1136         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1137 }
1138
1139 /*
1140  * COMPOUND call.
1141  */
1142 static __be32
1143 nfsd4_proc_compound(struct svc_rqst *rqstp,
1144                     struct nfsd4_compoundargs *args,
1145                     struct nfsd4_compoundres *resp)
1146 {
1147         struct nfsd4_op *op;
1148         struct nfsd4_operation *opdesc;
1149         struct nfsd4_compound_state *cstate = &resp->cstate;
1150         int             slack_bytes;
1151         u32             plen = 0;
1152         __be32          status;
1153
1154         resp->xbuf = &rqstp->rq_res;
1155         resp->p = rqstp->rq_res.head[0].iov_base +
1156                                                 rqstp->rq_res.head[0].iov_len;
1157         resp->tagp = resp->p;
1158         /* reserve space for: taglen, tag, and opcnt */
1159         resp->p += 2 + XDR_QUADLEN(args->taglen);
1160         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1161         resp->taglen = args->taglen;
1162         resp->tag = args->tag;
1163         resp->opcnt = 0;
1164         resp->rqstp = rqstp;
1165         resp->cstate.minorversion = args->minorversion;
1166         resp->cstate.replay_owner = NULL;
1167         resp->cstate.session = NULL;
1168         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1169         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1170         /*
1171          * Don't use the deferral mechanism for NFSv4; compounds make it
1172          * too hard to avoid non-idempotency problems.
1173          */
1174         rqstp->rq_usedeferral = 0;
1175
1176         /*
1177          * According to RFC3010, this takes precedence over all other errors.
1178          */
1179         status = nfserr_minor_vers_mismatch;
1180         if (args->minorversion > nfsd_supported_minorversion)
1181                 goto out;
1182
1183         status = nfs41_check_op_ordering(args);
1184         if (status) {
1185                 op = &args->ops[0];
1186                 op->status = status;
1187                 goto encode_op;
1188         }
1189
1190         while (!status && resp->opcnt < args->opcnt) {
1191                 op = &args->ops[resp->opcnt++];
1192
1193                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1194                         resp->opcnt, args->opcnt, op->opnum,
1195                         nfsd4_op_name(op->opnum));
1196                 /*
1197                  * The XDR decode routines may have pre-set op->status;
1198                  * for example, if there is a miscellaneous XDR error
1199                  * it will be set to nfserr_bad_xdr.
1200                  */
1201                 if (op->status)
1202                         goto encode_op;
1203
1204                 /* We must be able to encode a successful response to
1205                  * this operation, with enough room left over to encode a
1206                  * failed response to the next operation.  If we don't
1207                  * have enough room, fail with ERR_RESOURCE.
1208                  */
1209                 slack_bytes = (char *)resp->end - (char *)resp->p;
1210                 if (slack_bytes < COMPOUND_SLACK_SPACE
1211                                 + COMPOUND_ERR_SLACK_SPACE) {
1212                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1213                         op->status = nfserr_resource;
1214                         goto encode_op;
1215                 }
1216
1217                 opdesc = OPDESC(op);
1218
1219                 if (!cstate->current_fh.fh_dentry) {
1220                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1221                                 op->status = nfserr_nofilehandle;
1222                                 goto encode_op;
1223                         }
1224                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1225                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1226                         op->status = nfserr_moved;
1227                         goto encode_op;
1228                 }
1229
1230                 /* If op is non-idempotent */
1231                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1232                         plen = opdesc->op_rsize_bop(rqstp, op);
1233                         op->status = nfsd4_check_resp_size(resp, plen);
1234                 }
1235
1236                 if (op->status)
1237                         goto encode_op;
1238
1239                 if (opdesc->op_func) {
1240                         if (opdesc->op_get_currentstateid)
1241                                 opdesc->op_get_currentstateid(cstate, &op->u);
1242                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1243                 } else
1244                         BUG_ON(op->status == nfs_ok);
1245
1246                 if (!op->status) {
1247                         if (opdesc->op_set_currentstateid)
1248                                 opdesc->op_set_currentstateid(cstate, &op->u);
1249
1250                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1251                                 clear_current_stateid(cstate);
1252
1253                         if (need_wrongsec_check(rqstp))
1254                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1255                 }
1256
1257 encode_op:
1258                 /* Only from SEQUENCE */
1259                 if (resp->cstate.status == nfserr_replay_cache) {
1260                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1261                         status = op->status;
1262                         goto out;
1263                 }
1264                 if (op->status == nfserr_replay_me) {
1265                         op->replay = &cstate->replay_owner->so_replay;
1266                         nfsd4_encode_replay(resp, op);
1267                         status = op->status = op->replay->rp_status;
1268                 } else {
1269                         nfsd4_encode_operation(resp, op);
1270                         status = op->status;
1271                 }
1272
1273                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1274                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1275                         be32_to_cpu(status));
1276
1277                 if (cstate->replay_owner) {
1278                         nfs4_unlock_state();
1279                         cstate->replay_owner = NULL;
1280                 }
1281                 /* XXX Ugh, we need to get rid of this kind of special case: */
1282                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1283                         fput(op->u.read.rd_filp);
1284
1285                 nfsd4_increment_op_stats(op->opnum);
1286         }
1287
1288         resp->cstate.status = status;
1289         fh_put(&resp->cstate.current_fh);
1290         fh_put(&resp->cstate.save_fh);
1291         BUG_ON(resp->cstate.replay_owner);
1292 out:
1293         /* Reset deferral mechanism for RPC deferrals */
1294         rqstp->rq_usedeferral = 1;
1295         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1296         return status;
1297 }
1298
1299 #define op_encode_hdr_size              (2)
1300 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1301 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1302 #define op_encode_change_info_maxsz     (5)
1303 #define nfs4_fattr_bitmap_maxsz         (4)
1304
1305 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1306 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1307
1308 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1309
1310 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1311 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1312                                          op_encode_ace_maxsz)
1313
1314 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1315
1316 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1317 {
1318         return (op_encode_hdr_size) * sizeof(__be32);
1319 }
1320
1321 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1322 {
1323         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1324 }
1325
1326 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1327 {
1328         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1329 }
1330
1331 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1332 {
1333         return (op_encode_hdr_size + op_encode_change_info_maxsz
1334                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1335 }
1336
1337 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1338 {
1339         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1340                 * sizeof(__be32);
1341 }
1342
1343 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1344 {
1345         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1346                 * sizeof(__be32);
1347 }
1348
1349 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1350 {
1351         return (op_encode_hdr_size + op_encode_stateid_maxsz
1352                 + op_encode_change_info_maxsz + 1
1353                 + nfs4_fattr_bitmap_maxsz
1354                 + op_encode_delegation_maxsz) * sizeof(__be32);
1355 }
1356
1357 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1358 {
1359         u32 maxcount = 0, rlen = 0;
1360
1361         maxcount = svc_max_payload(rqstp);
1362         rlen = op->u.read.rd_length;
1363
1364         if (rlen > maxcount)
1365                 rlen = maxcount;
1366
1367         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1368 }
1369
1370 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1371 {
1372         u32 rlen = op->u.readdir.rd_maxcount;
1373
1374         if (rlen > PAGE_SIZE)
1375                 rlen = PAGE_SIZE;
1376
1377         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1378                  * sizeof(__be32) + rlen;
1379 }
1380
1381 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1382 {
1383         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1384                 * sizeof(__be32);
1385 }
1386
1387 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1388 {
1389         return (op_encode_hdr_size + op_encode_change_info_maxsz
1390                 + op_encode_change_info_maxsz) * sizeof(__be32);
1391 }
1392
1393 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1394 {
1395         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1396 }
1397
1398 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1399 {
1400         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1401 }
1402
1403 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1404 {
1405         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1406 }
1407
1408 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1409 {
1410         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1411                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1412                 2 + /*eir_server_owner.so_minor_id */\
1413                 /* eir_server_owner.so_major_id<> */\
1414                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1415                 /* eir_server_scope<> */\
1416                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1417                 1 + /* eir_server_impl_id array length */\
1418                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1419 }
1420
1421 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1422 {
1423         return (op_encode_hdr_size + \
1424                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1425                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1426 }
1427
1428 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1429 {
1430         return (op_encode_hdr_size + \
1431                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1432                 2 + /* csr_sequence, csr_flags */\
1433                 op_encode_channel_attrs_maxsz + \
1434                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1435 }
1436
1437 static struct nfsd4_operation nfsd4_ops[] = {
1438         [OP_ACCESS] = {
1439                 .op_func = (nfsd4op_func)nfsd4_access,
1440                 .op_name = "OP_ACCESS",
1441         },
1442         [OP_CLOSE] = {
1443                 .op_func = (nfsd4op_func)nfsd4_close,
1444                 .op_flags = OP_MODIFIES_SOMETHING,
1445                 .op_name = "OP_CLOSE",
1446                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1447                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1448                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1449         },
1450         [OP_COMMIT] = {
1451                 .op_func = (nfsd4op_func)nfsd4_commit,
1452                 .op_flags = OP_MODIFIES_SOMETHING,
1453                 .op_name = "OP_COMMIT",
1454                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1455         },
1456         [OP_CREATE] = {
1457                 .op_func = (nfsd4op_func)nfsd4_create,
1458                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1459                 .op_name = "OP_CREATE",
1460                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1461         },
1462         [OP_DELEGRETURN] = {
1463                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1464                 .op_flags = OP_MODIFIES_SOMETHING,
1465                 .op_name = "OP_DELEGRETURN",
1466                 .op_rsize_bop = nfsd4_only_status_rsize,
1467                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1468         },
1469         [OP_GETATTR] = {
1470                 .op_func = (nfsd4op_func)nfsd4_getattr,
1471                 .op_flags = ALLOWED_ON_ABSENT_FS,
1472                 .op_name = "OP_GETATTR",
1473         },
1474         [OP_GETFH] = {
1475                 .op_func = (nfsd4op_func)nfsd4_getfh,
1476                 .op_name = "OP_GETFH",
1477         },
1478         [OP_LINK] = {
1479                 .op_func = (nfsd4op_func)nfsd4_link,
1480                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1481                                 | OP_CACHEME,
1482                 .op_name = "OP_LINK",
1483                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1484         },
1485         [OP_LOCK] = {
1486                 .op_func = (nfsd4op_func)nfsd4_lock,
1487                 .op_flags = OP_MODIFIES_SOMETHING,
1488                 .op_name = "OP_LOCK",
1489                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1490                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1491         },
1492         [OP_LOCKT] = {
1493                 .op_func = (nfsd4op_func)nfsd4_lockt,
1494                 .op_name = "OP_LOCKT",
1495         },
1496         [OP_LOCKU] = {
1497                 .op_func = (nfsd4op_func)nfsd4_locku,
1498                 .op_flags = OP_MODIFIES_SOMETHING,
1499                 .op_name = "OP_LOCKU",
1500                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1501                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1502         },
1503         [OP_LOOKUP] = {
1504                 .op_func = (nfsd4op_func)nfsd4_lookup,
1505                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1506                 .op_name = "OP_LOOKUP",
1507         },
1508         [OP_LOOKUPP] = {
1509                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1510                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1511                 .op_name = "OP_LOOKUPP",
1512         },
1513         [OP_NVERIFY] = {
1514                 .op_func = (nfsd4op_func)nfsd4_nverify,
1515                 .op_name = "OP_NVERIFY",
1516         },
1517         [OP_OPEN] = {
1518                 .op_func = (nfsd4op_func)nfsd4_open,
1519                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1520                 .op_name = "OP_OPEN",
1521                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1522                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1523         },
1524         [OP_OPEN_CONFIRM] = {
1525                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1526                 .op_flags = OP_MODIFIES_SOMETHING,
1527                 .op_name = "OP_OPEN_CONFIRM",
1528                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1529         },
1530         [OP_OPEN_DOWNGRADE] = {
1531                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1532                 .op_flags = OP_MODIFIES_SOMETHING,
1533                 .op_name = "OP_OPEN_DOWNGRADE",
1534                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1535                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1536                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1537         },
1538         [OP_PUTFH] = {
1539                 .op_func = (nfsd4op_func)nfsd4_putfh,
1540                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1541                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1542                                 | OP_CLEAR_STATEID,
1543                 .op_name = "OP_PUTFH",
1544                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1545         },
1546         [OP_PUTPUBFH] = {
1547                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1548                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1549                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1550                                 | OP_CLEAR_STATEID,
1551                 .op_name = "OP_PUTPUBFH",
1552                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1553         },
1554         [OP_PUTROOTFH] = {
1555                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1556                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1557                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1558                                 | OP_CLEAR_STATEID,
1559                 .op_name = "OP_PUTROOTFH",
1560                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1561         },
1562         [OP_READ] = {
1563                 .op_func = (nfsd4op_func)nfsd4_read,
1564                 .op_flags = OP_MODIFIES_SOMETHING,
1565                 .op_name = "OP_READ",
1566                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1567                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1568         },
1569         [OP_READDIR] = {
1570                 .op_func = (nfsd4op_func)nfsd4_readdir,
1571                 .op_flags = OP_MODIFIES_SOMETHING,
1572                 .op_name = "OP_READDIR",
1573                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1574         },
1575         [OP_READLINK] = {
1576                 .op_func = (nfsd4op_func)nfsd4_readlink,
1577                 .op_name = "OP_READLINK",
1578         },
1579         [OP_REMOVE] = {
1580                 .op_func = (nfsd4op_func)nfsd4_remove,
1581                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1582                 .op_name = "OP_REMOVE",
1583                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1584         },
1585         [OP_RENAME] = {
1586                 .op_func = (nfsd4op_func)nfsd4_rename,
1587                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1588                 .op_name = "OP_RENAME",
1589                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1590         },
1591         [OP_RENEW] = {
1592                 .op_func = (nfsd4op_func)nfsd4_renew,
1593                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1594                                 | OP_MODIFIES_SOMETHING,
1595                 .op_name = "OP_RENEW",
1596                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1597
1598         },
1599         [OP_RESTOREFH] = {
1600                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1601                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1602                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1603                 .op_name = "OP_RESTOREFH",
1604                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1605         },
1606         [OP_SAVEFH] = {
1607                 .op_func = (nfsd4op_func)nfsd4_savefh,
1608                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1609                 .op_name = "OP_SAVEFH",
1610                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1611         },
1612         [OP_SECINFO] = {
1613                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1614                 .op_flags = OP_HANDLES_WRONGSEC,
1615                 .op_name = "OP_SECINFO",
1616         },
1617         [OP_SETATTR] = {
1618                 .op_func = (nfsd4op_func)nfsd4_setattr,
1619                 .op_name = "OP_SETATTR",
1620                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1621                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1622                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1623         },
1624         [OP_SETCLIENTID] = {
1625                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1626                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1627                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1628                 .op_name = "OP_SETCLIENTID",
1629                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1630         },
1631         [OP_SETCLIENTID_CONFIRM] = {
1632                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1633                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1634                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1635                 .op_name = "OP_SETCLIENTID_CONFIRM",
1636                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1637         },
1638         [OP_VERIFY] = {
1639                 .op_func = (nfsd4op_func)nfsd4_verify,
1640                 .op_name = "OP_VERIFY",
1641         },
1642         [OP_WRITE] = {
1643                 .op_func = (nfsd4op_func)nfsd4_write,
1644                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1645                 .op_name = "OP_WRITE",
1646                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1647                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1648         },
1649         [OP_RELEASE_LOCKOWNER] = {
1650                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1651                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1652                                 | OP_MODIFIES_SOMETHING,
1653                 .op_name = "OP_RELEASE_LOCKOWNER",
1654                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1655         },
1656
1657         /* NFSv4.1 operations */
1658         [OP_EXCHANGE_ID] = {
1659                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1660                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1661                                 | OP_MODIFIES_SOMETHING,
1662                 .op_name = "OP_EXCHANGE_ID",
1663                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1664         },
1665         [OP_BIND_CONN_TO_SESSION] = {
1666                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1667                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1668                                 | OP_MODIFIES_SOMETHING,
1669                 .op_name = "OP_BIND_CONN_TO_SESSION",
1670                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1671         },
1672         [OP_CREATE_SESSION] = {
1673                 .op_func = (nfsd4op_func)nfsd4_create_session,
1674                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1675                                 | OP_MODIFIES_SOMETHING,
1676                 .op_name = "OP_CREATE_SESSION",
1677                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1678         },
1679         [OP_DESTROY_SESSION] = {
1680                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1681                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1682                                 | OP_MODIFIES_SOMETHING,
1683                 .op_name = "OP_DESTROY_SESSION",
1684                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1685         },
1686         [OP_SEQUENCE] = {
1687                 .op_func = (nfsd4op_func)nfsd4_sequence,
1688                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1689                 .op_name = "OP_SEQUENCE",
1690         },
1691         [OP_DESTROY_CLIENTID] = {
1692                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1693                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1694                                 | OP_MODIFIES_SOMETHING,
1695                 .op_name = "OP_DESTROY_CLIENTID",
1696                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1697         },
1698         [OP_RECLAIM_COMPLETE] = {
1699                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1700                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1701                 .op_name = "OP_RECLAIM_COMPLETE",
1702                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1703         },
1704         [OP_SECINFO_NO_NAME] = {
1705                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1706                 .op_flags = OP_HANDLES_WRONGSEC,
1707                 .op_name = "OP_SECINFO_NO_NAME",
1708         },
1709         [OP_TEST_STATEID] = {
1710                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1711                 .op_flags = ALLOWED_WITHOUT_FH,
1712                 .op_name = "OP_TEST_STATEID",
1713         },
1714         [OP_FREE_STATEID] = {
1715                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1716                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1717                 .op_name = "OP_FREE_STATEID",
1718                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1719         },
1720 };
1721
1722 #ifdef NFSD_DEBUG
1723 static const char *nfsd4_op_name(unsigned opnum)
1724 {
1725         if (opnum < ARRAY_SIZE(nfsd4_ops))
1726                 return nfsd4_ops[opnum].op_name;
1727         return "unknown_operation";
1728 }
1729 #endif
1730
1731 #define nfsd4_voidres                   nfsd4_voidargs
1732 struct nfsd4_voidargs { int dummy; };
1733
1734 static struct svc_procedure             nfsd_procedures4[2] = {
1735         [NFSPROC4_NULL] = {
1736                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1737                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1738                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1739                 .pc_ressize = sizeof(struct nfsd4_voidres),
1740                 .pc_cachetype = RC_NOCACHE,
1741                 .pc_xdrressize = 1,
1742         },
1743         [NFSPROC4_COMPOUND] = {
1744                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1745                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1746                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1747                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1748                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1749                 .pc_release = nfsd4_release_compoundargs,
1750                 .pc_cachetype = RC_NOCACHE,
1751                 .pc_xdrressize = NFSD_BUFSIZE/4,
1752         },
1753 };
1754
1755 struct svc_version      nfsd_version4 = {
1756                 .vs_vers        = 4,
1757                 .vs_nproc       = 2,
1758                 .vs_proc        = nfsd_procedures4,
1759                 .vs_dispatch    = nfsd_dispatch,
1760                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1761 };
1762
1763 /*
1764  * Local variables:
1765  *  c-basic-offset: 8
1766  * End:
1767  */