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