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         }
 244         if (status)
 245                 goto out;
 246         status = nfsd_check_obj_isreg(resfh);
 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             !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 323                       &cstate->session->se_client->cl_flags) &&
 324             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 325                 return nfserr_grace;
 326
 327         if (nfsd4_has_session(cstate))
 328                 copy_clientid(&open->op_clientid, cstate->session);
 329
 330         nfs4_lock_state();
 331
 332         /* check seqid for replay. set nfs4_owner */
 333         resp = rqstp->rq_resp;
 334         status = nfsd4_process_open1(&resp->cstate, open);
 335         if (status == nfserr_replay_me) {
 336                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 337                 fh_put(&cstate->current_fh);
 338                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 339                                 &rp->rp_openfh);
 340                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 341                 if (status)
 342                         dprintk("nfsd4_open: replay failed"
 343                                 " restoring previous filehandle\n");
 344                 else
 345                         status = nfserr_replay_me;
 346         }
 347         if (status)
 348                 goto out;
 349
 350         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 351         if (status)
 352                 goto out;
 353
 354         /* Openowner is now set, so sequence id will get bumped.  Now we need
 355          * these checks before we do any creates: */
 356         status = nfserr_grace;
 357         if (locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 358                 goto out;
 359         status = nfserr_no_grace;
 360         if (!locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 361                 goto out;
 362
 363         switch (open->op_claim_type) {
 364                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 365                 case NFS4_OPEN_CLAIM_NULL:
 366                         status = do_open_lookup(rqstp, &cstate->current_fh,
 367                                                 open);
 368                         if (status)
 369                                 goto out;
 370                         break;
 371                 case NFS4_OPEN_CLAIM_PREVIOUS:
 372                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 373                         status = nfs4_check_open_reclaim(&open->op_clientid);
 374                         if (status)
 375                                 goto out;
 376                 case NFS4_OPEN_CLAIM_FH:
 377                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 378                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 379                                                  open);
 380                         if (status)
 381                                 goto out;
 382                         break;
 383                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 384                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 385                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 386                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 387                                 open->op_claim_type);
 388                         status = nfserr_notsupp;
 389                         goto out;
 390                 default:
 391                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 392                                 open->op_claim_type);
 393                         status = nfserr_inval;
 394                         goto out;
 395         }
 396         /*
 397          * nfsd4_process_open2() does the actual opening of the file.  If
 398          * successful, it (1) truncates the file if open->op_truncate was
 399          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 400          */
 401         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 402         WARN_ON(status && open->op_created);
 403 out:
 404         nfsd4_cleanup_open_state(open, status);
 405         if (open->op_openowner)
 406                 cstate->replay_owner = &open->op_openowner->oo_owner;
 407         else
 408                 nfs4_unlock_state();
 409         return status;
 410 }
 411
 412 /*
 413  * filehandle-manipulating ops.
 414  */
 415 static __be32
 416 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 417             struct svc_fh **getfh)
 418 {
 419         if (!cstate->current_fh.fh_dentry)
 420                 return nfserr_nofilehandle;
 421
 422         *getfh = &cstate->current_fh;
 423         return nfs_ok;
 424 }
 425
 426 static __be32
 427 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 428             struct nfsd4_putfh *putfh)
 429 {
 430         fh_put(&cstate->current_fh);
 431         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 432         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 433                putfh->pf_fhlen);
 434         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 435 }
 436
 437 static __be32
 438 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 439                 void *arg)
 440 {
 441         __be32 status;
 442
 443         fh_put(&cstate->current_fh);
 444         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 445         return status;
 446 }
 447
 448 static __be32
 449 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 450                 void *arg)
 451 {
 452         if (!cstate->save_fh.fh_dentry)
 453                 return nfserr_restorefh;
 454
 455         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 456         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 457                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 458                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 459         }
 460         return nfs_ok;
 461 }
 462
 463 static __be32
 464 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 465              void *arg)
 466 {
 467         if (!cstate->current_fh.fh_dentry)
 468                 return nfserr_nofilehandle;
 469
 470         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 471         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 472                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 473                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 474         }
 475         return nfs_ok;
 476 }
 477
 478 /*
 479  * misc nfsv4 ops
 480  */
 481 static __be32
 482 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 483              struct nfsd4_access *access)
 484 {
 485         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 486                 return nfserr_inval;
 487
 488         access->ac_resp_access = access->ac_req_access;
 489         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 490                            &access->ac_supported);
 491 }
 492
 493 static void gen_boot_verifier(nfs4_verifier *verifier)
 494 {
 495         __be32 verf[2];
 496
 497         verf[0] = (__be32)nfssvc_boot.tv_sec;
 498         verf[1] = (__be32)nfssvc_boot.tv_usec;
 499         memcpy(verifier->data, verf, sizeof(verifier->data));
 500 }
 501
 502 static __be32
 503 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 504              struct nfsd4_commit *commit)
 505 {
 506         gen_boot_verifier(&commit->co_verf);
 507         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 508                              commit->co_count);
 509 }
 510
 511 static __be32
 512 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 513              struct nfsd4_create *create)
 514 {
 515         struct svc_fh resfh;
 516         __be32 status;
 517         dev_t rdev;
 518
 519         fh_init(&resfh, NFS4_FHSIZE);
 520
 521         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 522                            NFSD_MAY_CREATE);
 523         if (status)
 524                 return status;
 525
 526         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 527                                     nfsd_attrmask);
 528         if (status)
 529                 return status;
 530
 531         switch (create->cr_type) {
 532         case NF4LNK:
 533                 /* ugh! we have to null-terminate the linktext, or
 534                  * vfs_symlink() will choke.  it is always safe to
 535                  * null-terminate by brute force, since at worst we
 536                  * will overwrite the first byte of the create namelen
 537                  * in the XDR buffer, which has already been extracted
 538                  * during XDR decode.
 539                  */
 540                 create->cr_linkname[create->cr_linklen] = 0;
 541
 542                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 543                                       create->cr_name, create->cr_namelen,
 544                                       create->cr_linkname, create->cr_linklen,
 545                                       &resfh, &create->cr_iattr);
 546                 break;
 547
 548         case NF4BLK:
 549                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 550                 if (MAJOR(rdev) != create->cr_specdata1 ||
 551                     MINOR(rdev) != create->cr_specdata2)
 552                         return nfserr_inval;
 553                 status = nfsd_create(rqstp, &cstate->current_fh,
 554                                      create->cr_name, create->cr_namelen,
 555                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 556                 break;
 557
 558         case NF4CHR:
 559                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 560                 if (MAJOR(rdev) != create->cr_specdata1 ||
 561                     MINOR(rdev) != create->cr_specdata2)
 562                         return nfserr_inval;
 563                 status = nfsd_create(rqstp, &cstate->current_fh,
 564                                      create->cr_name, create->cr_namelen,
 565                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 566                 break;
 567
 568         case NF4SOCK:
 569                 status = nfsd_create(rqstp, &cstate->current_fh,
 570                                      create->cr_name, create->cr_namelen,
 571                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 572                 break;
 573
 574         case NF4FIFO:
 575                 status = nfsd_create(rqstp, &cstate->current_fh,
 576                                      create->cr_name, create->cr_namelen,
 577                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 578                 break;
 579
 580         case NF4DIR:
 581                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 582                 status = nfsd_create(rqstp, &cstate->current_fh,
 583                                      create->cr_name, create->cr_namelen,
 584                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 585                 break;
 586
 587         default:
 588                 status = nfserr_badtype;
 589         }
 590
 591         if (status)
 592                 goto out;
 593
 594         if (create->cr_acl != NULL)
 595                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 596                                 create->cr_bmval);
 597
 598         fh_unlock(&cstate->current_fh);
 599         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 600         fh_dup2(&cstate->current_fh, &resfh);
 601 out:
 602         fh_put(&resfh);
 603         return status;
 604 }
 605
 606 static __be32
 607 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 608               struct nfsd4_getattr *getattr)
 609 {
 610         __be32 status;
 611
 612         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 613         if (status)
 614                 return status;
 615
 616         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 617                 return nfserr_inval;
 618
 619         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 620         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 621         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 622
 623         getattr->ga_fhp = &cstate->current_fh;
 624         return nfs_ok;
 625 }
 626
 627 static __be32
 628 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 629            struct nfsd4_link *link)
 630 {
 631         __be32 status = nfserr_nofilehandle;
 632
 633         if (!cstate->save_fh.fh_dentry)
 634                 return status;
 635         status = nfsd_link(rqstp, &cstate->current_fh,
 636                            link->li_name, link->li_namelen, &cstate->save_fh);
 637         if (!status)
 638                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 639         return status;
 640 }
 641
 642 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 643 {
 644         struct svc_fh tmp_fh;
 645         __be32 ret;
 646
 647         fh_init(&tmp_fh, NFS4_FHSIZE);
 648         ret = exp_pseudoroot(rqstp, &tmp_fh);
 649         if (ret)
 650                 return ret;
 651         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 652                 fh_put(&tmp_fh);
 653                 return nfserr_noent;
 654         }
 655         fh_put(&tmp_fh);
 656         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 657 }
 658
 659 static __be32
 660 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 661               void *arg)
 662 {
 663         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 664 }
 665
 666 static __be32
 667 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 668              struct nfsd4_lookup *lookup)
 669 {
 670         return nfsd_lookup(rqstp, &cstate->current_fh,
 671                            lookup->lo_name, lookup->lo_len,
 672                            &cstate->current_fh);
 673 }
 674
 675 static __be32
 676 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 677            struct nfsd4_read *read)
 678 {
 679         __be32 status;
 680
 681         /* no need to check permission - this will be done in nfsd_read() */
 682
 683         read->rd_filp = NULL;
 684         if (read->rd_offset >= OFFSET_MAX)
 685                 return nfserr_inval;
 686
 687         nfs4_lock_state();
 688         /* check stateid */
 689         if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 690                                                  cstate, &read->rd_stateid,
 691                                                  RD_STATE, &read->rd_filp))) {
 692                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 693                 goto out;
 694         }
 695         if (read->rd_filp)
 696                 get_file(read->rd_filp);
 697         status = nfs_ok;
 698 out:
 699         nfs4_unlock_state();
 700         read->rd_rqstp = rqstp;
 701         read->rd_fhp = &cstate->current_fh;
 702         return status;
 703 }
 704
 705 static __be32
 706 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 707               struct nfsd4_readdir *readdir)
 708 {
 709         u64 cookie = readdir->rd_cookie;
 710         static const nfs4_verifier zeroverf;
 711
 712         /* no need to check permission - this will be done in nfsd_readdir() */
 713
 714         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 715                 return nfserr_inval;
 716
 717         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 718         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 719         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 720
 721         if ((cookie == 1) || (cookie == 2) ||
 722             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 723                 return nfserr_bad_cookie;
 724
 725         readdir->rd_rqstp = rqstp;
 726         readdir->rd_fhp = &cstate->current_fh;
 727         return nfs_ok;
 728 }
 729
 730 static __be32
 731 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 732                struct nfsd4_readlink *readlink)
 733 {
 734         readlink->rl_rqstp = rqstp;
 735         readlink->rl_fhp = &cstate->current_fh;
 736         return nfs_ok;
 737 }
 738
 739 static __be32
 740 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 741              struct nfsd4_remove *remove)
 742 {
 743         __be32 status;
 744
 745         if (locks_in_grace(SVC_NET(rqstp)))
 746                 return nfserr_grace;
 747         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 748                              remove->rm_name, remove->rm_namelen);
 749         if (!status) {
 750                 fh_unlock(&cstate->current_fh);
 751                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 752         }
 753         return status;
 754 }
 755
 756 static __be32
 757 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 758              struct nfsd4_rename *rename)
 759 {
 760         __be32 status = nfserr_nofilehandle;
 761
 762         if (!cstate->save_fh.fh_dentry)
 763                 return status;
 764         if (locks_in_grace(SVC_NET(rqstp)) &&
 765                 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
 766                 return nfserr_grace;
 767         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 768                              rename->rn_snamelen, &cstate->current_fh,
 769                              rename->rn_tname, rename->rn_tnamelen);
 770
 771         /* the underlying filesystem returns different error's than required
 772          * by NFSv4. both save_fh and current_fh have been verified.. */
 773         if (status == nfserr_isdir)
 774                 status = nfserr_exist;
 775         else if ((status == nfserr_notdir) &&
 776                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 777                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 778                 status = nfserr_exist;
 779
 780         if (!status) {
 781                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 782                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 783         }
 784         return status;
 785 }
 786
 787 static __be32
 788 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 789               struct nfsd4_secinfo *secinfo)
 790 {
 791         struct svc_fh resfh;
 792         struct svc_export *exp;
 793         struct dentry *dentry;
 794         __be32 err;
 795
 796         fh_init(&resfh, NFS4_FHSIZE);
 797         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 798         if (err)
 799                 return err;
 800         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 801                                     secinfo->si_name, secinfo->si_namelen,
 802                                     &exp, &dentry);
 803         if (err)
 804                 return err;
 805         if (dentry->d_inode == NULL) {
 806                 exp_put(exp);
 807                 err = nfserr_noent;
 808         } else
 809                 secinfo->si_exp = exp;
 810         dput(dentry);
 811         if (cstate->minorversion)
 812                 /* See rfc 5661 section 2.6.3.1.1.8 */
 813                 fh_put(&cstate->current_fh);
 814         return err;
 815 }
 816
 817 static __be32
 818 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 819               struct nfsd4_secinfo_no_name *sin)
 820 {
 821         __be32 err;
 822
 823         switch (sin->sin_style) {
 824         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 825                 break;
 826         case NFS4_SECINFO_STYLE4_PARENT:
 827                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 828                 if (err)
 829                         return err;
 830                 break;
 831         default:
 832                 return nfserr_inval;
 833         }
 834         exp_get(cstate->current_fh.fh_export);
 835         sin->sin_exp = cstate->current_fh.fh_export;
 836         fh_put(&cstate->current_fh);
 837         return nfs_ok;
 838 }
 839
 840 static __be32
 841 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 842               struct nfsd4_setattr *setattr)
 843 {
 844         __be32 status = nfs_ok;
 845         int err;
 846
 847         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 848                 nfs4_lock_state();
 849                 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
 850                         &setattr->sa_stateid, WR_STATE, NULL);
 851                 nfs4_unlock_state();
 852                 if (status) {
 853                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 854                         return status;
 855                 }
 856         }
 857         err = fh_want_write(&cstate->current_fh);
 858         if (err)
 859                 return nfserrno(err);
 860         status = nfs_ok;
 861
 862         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 863                                     nfsd_attrmask);
 864         if (status)
 865                 goto out;
 866
 867         if (setattr->sa_acl != NULL)
 868                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 869                                             setattr->sa_acl);
 870         if (status)
 871                 goto out;
 872         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 873                                 0, (time_t)0);
 874 out:
 875         fh_drop_write(&cstate->current_fh);
 876         return status;
 877 }
 878
 879 static __be32
 880 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 881             struct nfsd4_write *write)
 882 {
 883         stateid_t *stateid = &write->wr_stateid;
 884         struct file *filp = NULL;
 885         __be32 status = nfs_ok;
 886         unsigned long cnt;
 887
 888         /* no need to check permission - this will be done in nfsd_write() */
 889
 890         if (write->wr_offset >= OFFSET_MAX)
 891                 return nfserr_inval;
 892
 893         nfs4_lock_state();
 894         status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 895                                         cstate, stateid, WR_STATE, &filp);
 896         if (filp)
 897                 get_file(filp);
 898         nfs4_unlock_state();
 899
 900         if (status) {
 901                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 902                 return status;
 903         }
 904
 905         cnt = write->wr_buflen;
 906         write->wr_how_written = write->wr_stable_how;
 907         gen_boot_verifier(&write->wr_verifier);
 908
 909         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 910                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 911                              &cnt, &write->wr_how_written);
 912         if (filp)
 913                 fput(filp);
 914
 915         write->wr_bytes_written = cnt;
 916
 917         return status;
 918 }
 919
 920 /* This routine never returns NFS_OK!  If there are no other errors, it
 921  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 922  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 923  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 924  */
 925 static __be32
 926 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 927              struct nfsd4_verify *verify)
 928 {
 929         __be32 *buf, *p;
 930         int count;
 931         __be32 status;
 932
 933         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 934         if (status)
 935                 return status;
 936
 937         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 938         if (status)
 939                 return status;
 940
 941         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 942             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 943                 return nfserr_inval;
 944         if (verify->ve_attrlen & 3)
 945                 return nfserr_inval;
 946
 947         /* count in words:
 948          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 949          */
 950         count = 4 + (verify->ve_attrlen >> 2);
 951         buf = kmalloc(count << 2, GFP_KERNEL);
 952         if (!buf)
 953                 return nfserr_jukebox;
 954
 955         status = nfsd4_encode_fattr(&cstate->current_fh,
 956                                     cstate->current_fh.fh_export,
 957                                     cstate->current_fh.fh_dentry, buf,
 958                                     &count, verify->ve_bmval,
 959                                     rqstp, 0);
 960
 961         /* this means that nfsd4_encode_fattr() ran out of space */
 962         if (status == nfserr_resource && count == 0)
 963                 status = nfserr_not_same;
 964         if (status)
 965                 goto out_kfree;
 966
 967         /* skip bitmap */
 968         p = buf + 1 + ntohl(buf[0]);
 969         status = nfserr_not_same;
 970         if (ntohl(*p++) != verify->ve_attrlen)
 971                 goto out_kfree;
 972         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 973                 status = nfserr_same;
 974
 975 out_kfree:
 976         kfree(buf);
 977         return status;
 978 }
 979
 980 static __be32
 981 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 982               struct nfsd4_verify *verify)
 983 {
 984         __be32 status;
 985
 986         status = _nfsd4_verify(rqstp, cstate, verify);
 987         return status == nfserr_not_same ? nfs_ok : status;
 988 }
 989
 990 static __be32
 991 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 992              struct nfsd4_verify *verify)
 993 {
 994         __be32 status;
 995
 996         status = _nfsd4_verify(rqstp, cstate, verify);
 997         return status == nfserr_same ? nfs_ok : status;
 998 }
 999
1000 /*
1001  * NULL call.
1002  */
1003 static __be32
1004 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1005 {
1006         return nfs_ok;
1007 }
1008
1009 static inline void nfsd4_increment_op_stats(u32 opnum)
1010 {
1011         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1012                 nfsdstats.nfs4_opcount[opnum]++;
1013 }
1014
1015 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1016                               void *);
1017 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1018 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1019 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1020
1021 enum nfsd4_op_flags {
1022         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1023         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1024         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1025         /* For rfc 5661 section 2.6.3.1.1: */
1026         OP_HANDLES_WRONGSEC = 1 << 3,
1027         OP_IS_PUTFH_LIKE = 1 << 4,
1028         /*
1029          * These are the ops whose result size we estimate before
1030          * encoding, to avoid performing an op then not being able to
1031          * respond or cache a response.  This includes writes and setattrs
1032          * as well as the operations usually called "nonidempotent":
1033          */
1034         OP_MODIFIES_SOMETHING = 1 << 5,
1035         /*
1036          * Cache compounds containing these ops in the xid-based drc:
1037          * We use the DRC for compounds containing non-idempotent
1038          * operations, *except* those that are 4.1-specific (since
1039          * sessions provide their own EOS), and except for stateful
1040          * operations other than setclientid and setclientid_confirm
1041          * (since sequence numbers provide EOS for open, lock, etc in
1042          * the v4.0 case).
1043          */
1044         OP_CACHEME = 1 << 6,
1045         /*
1046          * These are ops which clear current state id.
1047          */
1048         OP_CLEAR_STATEID = 1 << 7,
1049 };
1050
1051 struct nfsd4_operation {
1052         nfsd4op_func op_func;
1053         u32 op_flags;
1054         char *op_name;
1055         /* Try to get response size before operation */
1056         nfsd4op_rsize op_rsize_bop;
1057         stateid_getter op_get_currentstateid;
1058         stateid_setter op_set_currentstateid;
1059 };
1060
1061 static struct nfsd4_operation nfsd4_ops[];
1062
1063 #ifdef NFSD_DEBUG
1064 static const char *nfsd4_op_name(unsigned opnum);
1065 #endif
1066
1067 /*
1068  * Enforce NFSv4.1 COMPOUND ordering rules:
1069  *
1070  * Also note, enforced elsewhere:
1071  *      - SEQUENCE other than as first op results in
1072  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1073  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1074  *        (Enforced in nfsd4_bind_conn_to_session().)
1075  *      - DESTROY_SESSION must be the final operation in a compound, if
1076  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1077  *        (Enforced in nfsd4_destroy_session().)
1078  */
1079 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1080 {
1081         struct nfsd4_op *op = &args->ops[0];
1082
1083         /* These ordering requirements don't apply to NFSv4.0: */
1084         if (args->minorversion == 0)
1085                 return nfs_ok;
1086         /* This is weird, but OK, not our problem: */
1087         if (args->opcnt == 0)
1088                 return nfs_ok;
1089         if (op->status == nfserr_op_illegal)
1090                 return nfs_ok;
1091         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1092                 return nfserr_op_not_in_session;
1093         if (op->opnum == OP_SEQUENCE)
1094                 return nfs_ok;
1095         if (args->opcnt != 1)
1096                 return nfserr_not_only_op;
1097         return nfs_ok;
1098 }
1099
1100 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1101 {
1102         return &nfsd4_ops[op->opnum];
1103 }
1104
1105 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1106 {
1107         return OPDESC(op)->op_flags & OP_CACHEME;
1108 }
1109
1110 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1111 {
1112         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1113         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1114         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1115         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1116         struct nfsd4_operation *thisd;
1117         struct nfsd4_operation *nextd;
1118
1119         thisd = OPDESC(this);
1120         /*
1121          * Most ops check wronsec on our own; only the putfh-like ops
1122          * have special rules.
1123          */
1124         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1125                 return false;
1126         /*
1127          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1128          * put-filehandle operation if we're not going to use the
1129          * result:
1130          */
1131         if (argp->opcnt == resp->opcnt)
1132                 return false;
1133
1134         nextd = OPDESC(next);
1135         /*
1136          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1137          * errors themselves as necessary; others should check for them
1138          * now:
1139          */
1140         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1141 }
1142
1143 /*
1144  * COMPOUND call.
1145  */
1146 static __be32
1147 nfsd4_proc_compound(struct svc_rqst *rqstp,
1148                     struct nfsd4_compoundargs *args,
1149                     struct nfsd4_compoundres *resp)
1150 {
1151         struct nfsd4_op *op;
1152         struct nfsd4_operation *opdesc;
1153         struct nfsd4_compound_state *cstate = &resp->cstate;
1154         int             slack_bytes;
1155         u32             plen = 0;
1156         __be32          status;
1157
1158         resp->xbuf = &rqstp->rq_res;
1159         resp->p = rqstp->rq_res.head[0].iov_base +
1160                                                 rqstp->rq_res.head[0].iov_len;
1161         resp->tagp = resp->p;
1162         /* reserve space for: taglen, tag, and opcnt */
1163         resp->p += 2 + XDR_QUADLEN(args->taglen);
1164         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1165         resp->taglen = args->taglen;
1166         resp->tag = args->tag;
1167         resp->opcnt = 0;
1168         resp->rqstp = rqstp;
1169         resp->cstate.minorversion = args->minorversion;
1170         resp->cstate.replay_owner = NULL;
1171         resp->cstate.session = NULL;
1172         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1173         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1174         /*
1175          * Don't use the deferral mechanism for NFSv4; compounds make it
1176          * too hard to avoid non-idempotency problems.
1177          */
1178         rqstp->rq_usedeferral = 0;
1179
1180         /*
1181          * According to RFC3010, this takes precedence over all other errors.
1182          */
1183         status = nfserr_minor_vers_mismatch;
1184         if (args->minorversion > nfsd_supported_minorversion)
1185                 goto out;
1186
1187         status = nfs41_check_op_ordering(args);
1188         if (status) {
1189                 op = &args->ops[0];
1190                 op->status = status;
1191                 goto encode_op;
1192         }
1193
1194         while (!status && resp->opcnt < args->opcnt) {
1195                 op = &args->ops[resp->opcnt++];
1196
1197                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1198                         resp->opcnt, args->opcnt, op->opnum,
1199                         nfsd4_op_name(op->opnum));
1200                 /*
1201                  * The XDR decode routines may have pre-set op->status;
1202                  * for example, if there is a miscellaneous XDR error
1203                  * it will be set to nfserr_bad_xdr.
1204                  */
1205                 if (op->status)
1206                         goto encode_op;
1207
1208                 /* We must be able to encode a successful response to
1209                  * this operation, with enough room left over to encode a
1210                  * failed response to the next operation.  If we don't
1211                  * have enough room, fail with ERR_RESOURCE.
1212                  */
1213                 slack_bytes = (char *)resp->end - (char *)resp->p;
1214                 if (slack_bytes < COMPOUND_SLACK_SPACE
1215                                 + COMPOUND_ERR_SLACK_SPACE) {
1216                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1217                         op->status = nfserr_resource;
1218                         goto encode_op;
1219                 }
1220
1221                 opdesc = OPDESC(op);
1222
1223                 if (!cstate->current_fh.fh_dentry) {
1224                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1225                                 op->status = nfserr_nofilehandle;
1226                                 goto encode_op;
1227                         }
1228                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1229                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1230                         op->status = nfserr_moved;
1231                         goto encode_op;
1232                 }
1233
1234                 /* If op is non-idempotent */
1235                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1236                         plen = opdesc->op_rsize_bop(rqstp, op);
1237                         op->status = nfsd4_check_resp_size(resp, plen);
1238                 }
1239
1240                 if (op->status)
1241                         goto encode_op;
1242
1243                 if (opdesc->op_func) {
1244                         if (opdesc->op_get_currentstateid)
1245                                 opdesc->op_get_currentstateid(cstate, &op->u);
1246                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1247                 } else
1248                         BUG_ON(op->status == nfs_ok);
1249
1250                 if (!op->status) {
1251                         if (opdesc->op_set_currentstateid)
1252                                 opdesc->op_set_currentstateid(cstate, &op->u);
1253
1254                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1255                                 clear_current_stateid(cstate);
1256
1257                         if (need_wrongsec_check(rqstp))
1258                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1259                 }
1260
1261 encode_op:
1262                 /* Only from SEQUENCE */
1263                 if (resp->cstate.status == nfserr_replay_cache) {
1264                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1265                         status = op->status;
1266                         goto out;
1267                 }
1268                 if (op->status == nfserr_replay_me) {
1269                         op->replay = &cstate->replay_owner->so_replay;
1270                         nfsd4_encode_replay(resp, op);
1271                         status = op->status = op->replay->rp_status;
1272                 } else {
1273                         nfsd4_encode_operation(resp, op);
1274                         status = op->status;
1275                 }
1276
1277                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1278                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1279                         be32_to_cpu(status));
1280
1281                 if (cstate->replay_owner) {
1282                         nfs4_unlock_state();
1283                         cstate->replay_owner = NULL;
1284                 }
1285                 /* XXX Ugh, we need to get rid of this kind of special case: */
1286                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1287                         fput(op->u.read.rd_filp);
1288
1289                 nfsd4_increment_op_stats(op->opnum);
1290         }
1291
1292         resp->cstate.status = status;
1293         fh_put(&resp->cstate.current_fh);
1294         fh_put(&resp->cstate.save_fh);
1295         BUG_ON(resp->cstate.replay_owner);
1296 out:
1297         /* Reset deferral mechanism for RPC deferrals */
1298         rqstp->rq_usedeferral = 1;
1299         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1300         return status;
1301 }
1302
1303 #define op_encode_hdr_size              (2)
1304 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1305 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1306 #define op_encode_change_info_maxsz     (5)
1307 #define nfs4_fattr_bitmap_maxsz         (4)
1308
1309 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1310 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1311
1312 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1313
1314 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1315 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1316                                          op_encode_ace_maxsz)
1317
1318 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1319
1320 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1321 {
1322         return (op_encode_hdr_size) * sizeof(__be32);
1323 }
1324
1325 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1326 {
1327         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1328 }
1329
1330 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1331 {
1332         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1333 }
1334
1335 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1336 {
1337         return (op_encode_hdr_size + op_encode_change_info_maxsz
1338                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1339 }
1340
1341 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1342 {
1343         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1344                 * sizeof(__be32);
1345 }
1346
1347 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1348 {
1349         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1350                 * sizeof(__be32);
1351 }
1352
1353 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1354 {
1355         return (op_encode_hdr_size + op_encode_stateid_maxsz
1356                 + op_encode_change_info_maxsz + 1
1357                 + nfs4_fattr_bitmap_maxsz
1358                 + op_encode_delegation_maxsz) * sizeof(__be32);
1359 }
1360
1361 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1362 {
1363         u32 maxcount = 0, rlen = 0;
1364
1365         maxcount = svc_max_payload(rqstp);
1366         rlen = op->u.read.rd_length;
1367
1368         if (rlen > maxcount)
1369                 rlen = maxcount;
1370
1371         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1372 }
1373
1374 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1375 {
1376         u32 rlen = op->u.readdir.rd_maxcount;
1377
1378         if (rlen > PAGE_SIZE)
1379                 rlen = PAGE_SIZE;
1380
1381         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1382                  * sizeof(__be32) + rlen;
1383 }
1384
1385 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1386 {
1387         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1388                 * sizeof(__be32);
1389 }
1390
1391 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1392 {
1393         return (op_encode_hdr_size + op_encode_change_info_maxsz
1394                 + op_encode_change_info_maxsz) * sizeof(__be32);
1395 }
1396
1397 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1398 {
1399         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1400 }
1401
1402 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1403 {
1404         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1405 }
1406
1407 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1408 {
1409         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1410 }
1411
1412 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1413 {
1414         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1415                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1416                 2 + /*eir_server_owner.so_minor_id */\
1417                 /* eir_server_owner.so_major_id<> */\
1418                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1419                 /* eir_server_scope<> */\
1420                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1421                 1 + /* eir_server_impl_id array length */\
1422                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1423 }
1424
1425 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1426 {
1427         return (op_encode_hdr_size + \
1428                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1429                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1430 }
1431
1432 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1433 {
1434         return (op_encode_hdr_size + \
1435                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1436                 2 + /* csr_sequence, csr_flags */\
1437                 op_encode_channel_attrs_maxsz + \
1438                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1439 }
1440
1441 static struct nfsd4_operation nfsd4_ops[] = {
1442         [OP_ACCESS] = {
1443                 .op_func = (nfsd4op_func)nfsd4_access,
1444                 .op_name = "OP_ACCESS",
1445         },
1446         [OP_CLOSE] = {
1447                 .op_func = (nfsd4op_func)nfsd4_close,
1448                 .op_flags = OP_MODIFIES_SOMETHING,
1449                 .op_name = "OP_CLOSE",
1450                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1451                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1452                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1453         },
1454         [OP_COMMIT] = {
1455                 .op_func = (nfsd4op_func)nfsd4_commit,
1456                 .op_flags = OP_MODIFIES_SOMETHING,
1457                 .op_name = "OP_COMMIT",
1458                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1459         },
1460         [OP_CREATE] = {
1461                 .op_func = (nfsd4op_func)nfsd4_create,
1462                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1463                 .op_name = "OP_CREATE",
1464                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1465         },
1466         [OP_DELEGRETURN] = {
1467                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1468                 .op_flags = OP_MODIFIES_SOMETHING,
1469                 .op_name = "OP_DELEGRETURN",
1470                 .op_rsize_bop = nfsd4_only_status_rsize,
1471                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1472         },
1473         [OP_GETATTR] = {
1474                 .op_func = (nfsd4op_func)nfsd4_getattr,
1475                 .op_flags = ALLOWED_ON_ABSENT_FS,
1476                 .op_name = "OP_GETATTR",
1477         },
1478         [OP_GETFH] = {
1479                 .op_func = (nfsd4op_func)nfsd4_getfh,
1480                 .op_name = "OP_GETFH",
1481         },
1482         [OP_LINK] = {
1483                 .op_func = (nfsd4op_func)nfsd4_link,
1484                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1485                                 | OP_CACHEME,
1486                 .op_name = "OP_LINK",
1487                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1488         },
1489         [OP_LOCK] = {
1490                 .op_func = (nfsd4op_func)nfsd4_lock,
1491                 .op_flags = OP_MODIFIES_SOMETHING,
1492                 .op_name = "OP_LOCK",
1493                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1494                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1495         },
1496         [OP_LOCKT] = {
1497                 .op_func = (nfsd4op_func)nfsd4_lockt,
1498                 .op_name = "OP_LOCKT",
1499         },
1500         [OP_LOCKU] = {
1501                 .op_func = (nfsd4op_func)nfsd4_locku,
1502                 .op_flags = OP_MODIFIES_SOMETHING,
1503                 .op_name = "OP_LOCKU",
1504                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1505                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1506         },
1507         [OP_LOOKUP] = {
1508                 .op_func = (nfsd4op_func)nfsd4_lookup,
1509                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1510                 .op_name = "OP_LOOKUP",
1511         },
1512         [OP_LOOKUPP] = {
1513                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1514                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1515                 .op_name = "OP_LOOKUPP",
1516         },
1517         [OP_NVERIFY] = {
1518                 .op_func = (nfsd4op_func)nfsd4_nverify,
1519                 .op_name = "OP_NVERIFY",
1520         },
1521         [OP_OPEN] = {
1522                 .op_func = (nfsd4op_func)nfsd4_open,
1523                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1524                 .op_name = "OP_OPEN",
1525                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1526                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1527         },
1528         [OP_OPEN_CONFIRM] = {
1529                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1530                 .op_flags = OP_MODIFIES_SOMETHING,
1531                 .op_name = "OP_OPEN_CONFIRM",
1532                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1533         },
1534         [OP_OPEN_DOWNGRADE] = {
1535                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1536                 .op_flags = OP_MODIFIES_SOMETHING,
1537                 .op_name = "OP_OPEN_DOWNGRADE",
1538                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1539                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1540                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1541         },
1542         [OP_PUTFH] = {
1543                 .op_func = (nfsd4op_func)nfsd4_putfh,
1544                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1545                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1546                                 | OP_CLEAR_STATEID,
1547                 .op_name = "OP_PUTFH",
1548                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1549         },
1550         [OP_PUTPUBFH] = {
1551                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1552                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1553                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1554                                 | OP_CLEAR_STATEID,
1555                 .op_name = "OP_PUTPUBFH",
1556                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1557         },
1558         [OP_PUTROOTFH] = {
1559                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1560                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1561                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1562                                 | OP_CLEAR_STATEID,
1563                 .op_name = "OP_PUTROOTFH",
1564                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1565         },
1566         [OP_READ] = {
1567                 .op_func = (nfsd4op_func)nfsd4_read,
1568                 .op_flags = OP_MODIFIES_SOMETHING,
1569                 .op_name = "OP_READ",
1570                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1571                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1572         },
1573         [OP_READDIR] = {
1574                 .op_func = (nfsd4op_func)nfsd4_readdir,
1575                 .op_flags = OP_MODIFIES_SOMETHING,
1576                 .op_name = "OP_READDIR",
1577                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1578         },
1579         [OP_READLINK] = {
1580                 .op_func = (nfsd4op_func)nfsd4_readlink,
1581                 .op_name = "OP_READLINK",
1582         },
1583         [OP_REMOVE] = {
1584                 .op_func = (nfsd4op_func)nfsd4_remove,
1585                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1586                 .op_name = "OP_REMOVE",
1587                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1588         },
1589         [OP_RENAME] = {
1590                 .op_func = (nfsd4op_func)nfsd4_rename,
1591                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1592                 .op_name = "OP_RENAME",
1593                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1594         },
1595         [OP_RENEW] = {
1596                 .op_func = (nfsd4op_func)nfsd4_renew,
1597                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1598                                 | OP_MODIFIES_SOMETHING,
1599                 .op_name = "OP_RENEW",
1600                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1601
1602         },
1603         [OP_RESTOREFH] = {
1604                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1605                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1606                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1607                 .op_name = "OP_RESTOREFH",
1608                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1609         },
1610         [OP_SAVEFH] = {
1611                 .op_func = (nfsd4op_func)nfsd4_savefh,
1612                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1613                 .op_name = "OP_SAVEFH",
1614                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1615         },
1616         [OP_SECINFO] = {
1617                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1618                 .op_flags = OP_HANDLES_WRONGSEC,
1619                 .op_name = "OP_SECINFO",
1620         },
1621         [OP_SETATTR] = {
1622                 .op_func = (nfsd4op_func)nfsd4_setattr,
1623                 .op_name = "OP_SETATTR",
1624                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1625                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1626                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1627         },
1628         [OP_SETCLIENTID] = {
1629                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1630                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1631                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1632                 .op_name = "OP_SETCLIENTID",
1633                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1634         },
1635         [OP_SETCLIENTID_CONFIRM] = {
1636                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1637                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1638                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1639                 .op_name = "OP_SETCLIENTID_CONFIRM",
1640                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1641         },
1642         [OP_VERIFY] = {
1643                 .op_func = (nfsd4op_func)nfsd4_verify,
1644                 .op_name = "OP_VERIFY",
1645         },
1646         [OP_WRITE] = {
1647                 .op_func = (nfsd4op_func)nfsd4_write,
1648                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1649                 .op_name = "OP_WRITE",
1650                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1651                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1652         },
1653         [OP_RELEASE_LOCKOWNER] = {
1654                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1655                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1656                                 | OP_MODIFIES_SOMETHING,
1657                 .op_name = "OP_RELEASE_LOCKOWNER",
1658                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1659         },
1660
1661         /* NFSv4.1 operations */
1662         [OP_EXCHANGE_ID] = {
1663                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1664                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1665                                 | OP_MODIFIES_SOMETHING,
1666                 .op_name = "OP_EXCHANGE_ID",
1667                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1668         },
1669         [OP_BIND_CONN_TO_SESSION] = {
1670                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1671                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1672                                 | OP_MODIFIES_SOMETHING,
1673                 .op_name = "OP_BIND_CONN_TO_SESSION",
1674                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1675         },
1676         [OP_CREATE_SESSION] = {
1677                 .op_func = (nfsd4op_func)nfsd4_create_session,
1678                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1679                                 | OP_MODIFIES_SOMETHING,
1680                 .op_name = "OP_CREATE_SESSION",
1681                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1682         },
1683         [OP_DESTROY_SESSION] = {
1684                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1685                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1686                                 | OP_MODIFIES_SOMETHING,
1687                 .op_name = "OP_DESTROY_SESSION",
1688                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1689         },
1690         [OP_SEQUENCE] = {
1691                 .op_func = (nfsd4op_func)nfsd4_sequence,
1692                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1693                 .op_name = "OP_SEQUENCE",
1694         },
1695         [OP_DESTROY_CLIENTID] = {
1696                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1697                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1698                                 | OP_MODIFIES_SOMETHING,
1699                 .op_name = "OP_DESTROY_CLIENTID",
1700                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1701         },
1702         [OP_RECLAIM_COMPLETE] = {
1703                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1704                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1705                 .op_name = "OP_RECLAIM_COMPLETE",
1706                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1707         },
1708         [OP_SECINFO_NO_NAME] = {
1709                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1710                 .op_flags = OP_HANDLES_WRONGSEC,
1711                 .op_name = "OP_SECINFO_NO_NAME",
1712         },
1713         [OP_TEST_STATEID] = {
1714                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1715                 .op_flags = ALLOWED_WITHOUT_FH,
1716                 .op_name = "OP_TEST_STATEID",
1717         },
1718         [OP_FREE_STATEID] = {
1719                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1720                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1721                 .op_name = "OP_FREE_STATEID",
1722                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1723         },
1724 };
1725
1726 #ifdef NFSD_DEBUG
1727 static const char *nfsd4_op_name(unsigned opnum)
1728 {
1729         if (opnum < ARRAY_SIZE(nfsd4_ops))
1730                 return nfsd4_ops[opnum].op_name;
1731         return "unknown_operation";
1732 }
1733 #endif
1734
1735 #define nfsd4_voidres                   nfsd4_voidargs
1736 struct nfsd4_voidargs { int dummy; };
1737
1738 static struct svc_procedure             nfsd_procedures4[2] = {
1739         [NFSPROC4_NULL] = {
1740                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1741                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1742                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1743                 .pc_ressize = sizeof(struct nfsd4_voidres),
1744                 .pc_cachetype = RC_NOCACHE,
1745                 .pc_xdrressize = 1,
1746         },
1747         [NFSPROC4_COMPOUND] = {
1748                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1749                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1750                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1751                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1752                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1753                 .pc_release = nfsd4_release_compoundargs,
1754                 .pc_cachetype = RC_NOCACHE,
1755                 .pc_xdrressize = NFSD_BUFSIZE/4,
1756         },
1757 };
1758
1759 struct svc_version      nfsd_version4 = {
1760                 .vs_vers        = 4,
1761                 .vs_nproc       = 2,
1762                 .vs_proc        = nfsd_procedures4,
1763                 .vs_dispatch    = nfsd_dispatch,
1764                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1765 };
1766
1767 /*
1768  * Local variables:
1769  *  c-basic-offset: 8
1770  * End:
1771  */