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         int accmode;
 198         __be32 status;
 199
 200         resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 201         if (!resfh)
 202                 return nfserr_jukebox;
 203         fh_init(resfh, NFS4_FHSIZE);
 204         open->op_truncate = 0;
 205
 206         if (open->op_create) {
 207                 /* FIXME: check session persistence and pnfs flags.
 208                  * The nfsv4.1 spec requires the following semantics:
 209                  *
 210                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 211                  * Reply Cache  | server |                 |
 212                  * -------------+--------+-----------------+--------------------
 213                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 214                  *              |        |                 | (SHOULD)
 215                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 216                  *              |        |                 | (SHOULD NOT)
 217                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 218                  * yes          | no     | GUARDED4        | GUARDED4
 219                  * yes          | yes    | GUARDED4        | GUARDED4
 220                  */
 221
 222                 /*
 223                  * Note: create modes (UNCHECKED,GUARDED...) are the same
 224                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
 225                  */
 226                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 227                                         open->op_fname.len, &open->op_iattr,
 228                                         resfh, open->op_createmode,
 229                                         (u32 *)open->op_verf.data,
 230                                         &open->op_truncate, &open->op_created);
 231
 232                 /*
 233                  * Following rfc 3530 14.2.16, use the returned bitmask
 234                  * to indicate which attributes we used to store the
 235                  * verifier:
 236                  */
 237                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 238                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 239                                                         FATTR4_WORD1_TIME_MODIFY);
 240         } else {
 241                 status = nfsd_lookup(rqstp, current_fh,
 242                                      open->op_fname.data, open->op_fname.len, resfh);
 243                 fh_unlock(current_fh);
 244         }
 245         if (status)
 246                 goto out;
 247         status = nfsd_check_obj_isreg(resfh);
 248         if (status)
 249                 goto out;
 250
 251         if (is_create_with_attrs(open) && open->op_acl != NULL)
 252                 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
 253
 254         /* set reply cache */
 255         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 256                         &resfh->fh_handle);
 257         accmode = NFSD_MAY_NOP;
 258         if (open->op_created)
 259                 accmode |= NFSD_MAY_OWNER_OVERRIDE;
 260         status = do_open_permission(rqstp, resfh, open, accmode);
 261         set_change_info(&open->op_cinfo, current_fh);
 262         fh_dup2(current_fh, resfh);
 263 out:
 264         fh_put(resfh);
 265         kfree(resfh);
 266         return status;
 267 }
 268
 269 static __be32
 270 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 271 {
 272         __be32 status;
 273         int accmode = 0;
 274
 275         /* We don't know the target directory, and therefore can not
 276         * set the change info
 277         */
 278
 279         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 280
 281         /* set replay cache */
 282         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 283                         &current_fh->fh_handle);
 284
 285         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 286                 (open->op_iattr.ia_size == 0);
 287         /*
 288          * In the delegation case, the client is telling us about an
 289          * open that it *already* performed locally, some time ago.  We
 290          * should let it succeed now if possible.
 291          *
 292          * In the case of a CLAIM_FH open, on the other hand, the client
 293          * may be counting on us to enforce permissions (the Linux 4.1
 294          * client uses this for normal opens, for example).
 295          */
 296         if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
 297                 accmode = NFSD_MAY_OWNER_OVERRIDE;
 298
 299         status = do_open_permission(rqstp, current_fh, open, accmode);
 300
 301         return status;
 302 }
 303
 304 static void
 305 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 306 {
 307         struct nfsd4_sessionid *sid =
 308                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 309
 310         clid->cl_boot = sid->clientid.cl_boot;
 311         clid->cl_id = sid->clientid.cl_id;
 312 }
 313
 314 static __be32
 315 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 316            struct nfsd4_open *open)
 317 {
 318         __be32 status;
 319         struct nfsd4_compoundres *resp;
 320
 321         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 322                 (int)open->op_fname.len, open->op_fname.data,
 323                 open->op_openowner);
 324
 325         /* This check required by spec. */
 326         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 327                 return nfserr_inval;
 328
 329         open->op_created = 0;
 330         /*
 331          * RFC5661 18.51.3
 332          * Before RECLAIM_COMPLETE done, server should deny new lock
 333          */
 334         if (nfsd4_has_session(cstate) &&
 335             !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 336                       &cstate->session->se_client->cl_flags) &&
 337             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 338                 return nfserr_grace;
 339
 340         if (nfsd4_has_session(cstate))
 341                 copy_clientid(&open->op_clientid, cstate->session);
 342
 343         nfs4_lock_state();
 344
 345         /* check seqid for replay. set nfs4_owner */
 346         resp = rqstp->rq_resp;
 347         status = nfsd4_process_open1(&resp->cstate, open);
 348         if (status == nfserr_replay_me) {
 349                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 350                 fh_put(&cstate->current_fh);
 351                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 352                                 &rp->rp_openfh);
 353                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 354                 if (status)
 355                         dprintk("nfsd4_open: replay failed"
 356                                 " restoring previous filehandle\n");
 357                 else
 358                         status = nfserr_replay_me;
 359         }
 360         if (status)
 361                 goto out;
 362
 363         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 364         if (status)
 365                 goto out;
 366
 367         /* Openowner is now set, so sequence id will get bumped.  Now we need
 368          * these checks before we do any creates: */
 369         status = nfserr_grace;
 370         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 371                 goto out;
 372         status = nfserr_no_grace;
 373         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 374                 goto out;
 375
 376         switch (open->op_claim_type) {
 377                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 378                 case NFS4_OPEN_CLAIM_NULL:
 379                         status = do_open_lookup(rqstp, &cstate->current_fh,
 380                                                 open);
 381                         if (status)
 382                                 goto out;
 383                         break;
 384                 case NFS4_OPEN_CLAIM_PREVIOUS:
 385                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 386                         status = nfs4_check_open_reclaim(&open->op_clientid);
 387                         if (status)
 388                                 goto out;
 389                 case NFS4_OPEN_CLAIM_FH:
 390                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 391                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 392                                                  open);
 393                         if (status)
 394                                 goto out;
 395                         break;
 396                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 397                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 398                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 399                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 400                                 open->op_claim_type);
 401                         status = nfserr_notsupp;
 402                         goto out;
 403                 default:
 404                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 405                                 open->op_claim_type);
 406                         status = nfserr_inval;
 407                         goto out;
 408         }
 409         /*
 410          * nfsd4_process_open2() does the actual opening of the file.  If
 411          * successful, it (1) truncates the file if open->op_truncate was
 412          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 413          */
 414         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 415         WARN_ON(status && open->op_created);
 416 out:
 417         nfsd4_cleanup_open_state(open, status);
 418         if (open->op_openowner)
 419                 cstate->replay_owner = &open->op_openowner->oo_owner;
 420         else
 421                 nfs4_unlock_state();
 422         return status;
 423 }
 424
 425 /*
 426  * filehandle-manipulating ops.
 427  */
 428 static __be32
 429 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 430             struct svc_fh **getfh)
 431 {
 432         if (!cstate->current_fh.fh_dentry)
 433                 return nfserr_nofilehandle;
 434
 435         *getfh = &cstate->current_fh;
 436         return nfs_ok;
 437 }
 438
 439 static __be32
 440 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 441             struct nfsd4_putfh *putfh)
 442 {
 443         fh_put(&cstate->current_fh);
 444         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 445         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 446                putfh->pf_fhlen);
 447         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 448 }
 449
 450 static __be32
 451 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 452                 void *arg)
 453 {
 454         __be32 status;
 455
 456         fh_put(&cstate->current_fh);
 457         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 458         return status;
 459 }
 460
 461 static __be32
 462 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 463                 void *arg)
 464 {
 465         if (!cstate->save_fh.fh_dentry)
 466                 return nfserr_restorefh;
 467
 468         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 469         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 470                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 471                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 472         }
 473         return nfs_ok;
 474 }
 475
 476 static __be32
 477 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 478              void *arg)
 479 {
 480         if (!cstate->current_fh.fh_dentry)
 481                 return nfserr_nofilehandle;
 482
 483         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 484         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 485                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 486                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 487         }
 488         return nfs_ok;
 489 }
 490
 491 /*
 492  * misc nfsv4 ops
 493  */
 494 static __be32
 495 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 496              struct nfsd4_access *access)
 497 {
 498         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 499                 return nfserr_inval;
 500
 501         access->ac_resp_access = access->ac_req_access;
 502         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 503                            &access->ac_supported);
 504 }
 505
 506 static void gen_boot_verifier(nfs4_verifier *verifier)
 507 {
 508         __be32 verf[2];
 509
 510         verf[0] = (__be32)nfssvc_boot.tv_sec;
 511         verf[1] = (__be32)nfssvc_boot.tv_usec;
 512         memcpy(verifier->data, verf, sizeof(verifier->data));
 513 }
 514
 515 static __be32
 516 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 517              struct nfsd4_commit *commit)
 518 {
 519         gen_boot_verifier(&commit->co_verf);
 520         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 521                              commit->co_count);
 522 }
 523
 524 static __be32
 525 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 526              struct nfsd4_create *create)
 527 {
 528         struct svc_fh resfh;
 529         __be32 status;
 530         dev_t rdev;
 531
 532         fh_init(&resfh, NFS4_FHSIZE);
 533
 534         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 535                            NFSD_MAY_CREATE);
 536         if (status)
 537                 return status;
 538
 539         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 540                                     nfsd_attrmask);
 541         if (status)
 542                 return status;
 543
 544         switch (create->cr_type) {
 545         case NF4LNK:
 546                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 547                                       create->cr_name, create->cr_namelen,
 548                                       create->cr_linkname, create->cr_linklen,
 549                                       &resfh, &create->cr_iattr);
 550                 break;
 551
 552         case NF4BLK:
 553                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 554                 if (MAJOR(rdev) != create->cr_specdata1 ||
 555                     MINOR(rdev) != create->cr_specdata2)
 556                         return nfserr_inval;
 557                 status = nfsd_create(rqstp, &cstate->current_fh,
 558                                      create->cr_name, create->cr_namelen,
 559                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 560                 break;
 561
 562         case NF4CHR:
 563                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 564                 if (MAJOR(rdev) != create->cr_specdata1 ||
 565                     MINOR(rdev) != create->cr_specdata2)
 566                         return nfserr_inval;
 567                 status = nfsd_create(rqstp, &cstate->current_fh,
 568                                      create->cr_name, create->cr_namelen,
 569                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 570                 break;
 571
 572         case NF4SOCK:
 573                 status = nfsd_create(rqstp, &cstate->current_fh,
 574                                      create->cr_name, create->cr_namelen,
 575                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 576                 break;
 577
 578         case NF4FIFO:
 579                 status = nfsd_create(rqstp, &cstate->current_fh,
 580                                      create->cr_name, create->cr_namelen,
 581                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 582                 break;
 583
 584         case NF4DIR:
 585                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 586                 status = nfsd_create(rqstp, &cstate->current_fh,
 587                                      create->cr_name, create->cr_namelen,
 588                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 589                 break;
 590
 591         default:
 592                 status = nfserr_badtype;
 593         }
 594
 595         if (status)
 596                 goto out;
 597
 598         if (create->cr_acl != NULL)
 599                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 600                                 create->cr_bmval);
 601
 602         fh_unlock(&cstate->current_fh);
 603         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 604         fh_dup2(&cstate->current_fh, &resfh);
 605 out:
 606         fh_put(&resfh);
 607         return status;
 608 }
 609
 610 static __be32
 611 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 612               struct nfsd4_getattr *getattr)
 613 {
 614         __be32 status;
 615
 616         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 617         if (status)
 618                 return status;
 619
 620         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 621                 return nfserr_inval;
 622
 623         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 624         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 625         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 626
 627         getattr->ga_fhp = &cstate->current_fh;
 628         return nfs_ok;
 629 }
 630
 631 static __be32
 632 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 633            struct nfsd4_link *link)
 634 {
 635         __be32 status = nfserr_nofilehandle;
 636
 637         if (!cstate->save_fh.fh_dentry)
 638                 return status;
 639         status = nfsd_link(rqstp, &cstate->current_fh,
 640                            link->li_name, link->li_namelen, &cstate->save_fh);
 641         if (!status)
 642                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 643         return status;
 644 }
 645
 646 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 647 {
 648         struct svc_fh tmp_fh;
 649         __be32 ret;
 650
 651         fh_init(&tmp_fh, NFS4_FHSIZE);
 652         ret = exp_pseudoroot(rqstp, &tmp_fh);
 653         if (ret)
 654                 return ret;
 655         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 656                 fh_put(&tmp_fh);
 657                 return nfserr_noent;
 658         }
 659         fh_put(&tmp_fh);
 660         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 661 }
 662
 663 static __be32
 664 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 665               void *arg)
 666 {
 667         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 668 }
 669
 670 static __be32
 671 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 672              struct nfsd4_lookup *lookup)
 673 {
 674         return nfsd_lookup(rqstp, &cstate->current_fh,
 675                            lookup->lo_name, lookup->lo_len,
 676                            &cstate->current_fh);
 677 }
 678
 679 static __be32
 680 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 681            struct nfsd4_read *read)
 682 {
 683         __be32 status;
 684
 685         /* no need to check permission - this will be done in nfsd_read() */
 686
 687         read->rd_filp = NULL;
 688         if (read->rd_offset >= OFFSET_MAX)
 689                 return nfserr_inval;
 690
 691         nfs4_lock_state();
 692         /* check stateid */
 693         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 694                                                  RD_STATE, &read->rd_filp))) {
 695                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 696                 goto out;
 697         }
 698         if (read->rd_filp)
 699                 get_file(read->rd_filp);
 700         status = nfs_ok;
 701 out:
 702         nfs4_unlock_state();
 703         read->rd_rqstp = rqstp;
 704         read->rd_fhp = &cstate->current_fh;
 705         return status;
 706 }
 707
 708 static __be32
 709 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 710               struct nfsd4_readdir *readdir)
 711 {
 712         u64 cookie = readdir->rd_cookie;
 713         static const nfs4_verifier zeroverf;
 714
 715         /* no need to check permission - this will be done in nfsd_readdir() */
 716
 717         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 718                 return nfserr_inval;
 719
 720         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 721         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 722         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 723
 724         if ((cookie == 1) || (cookie == 2) ||
 725             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 726                 return nfserr_bad_cookie;
 727
 728         readdir->rd_rqstp = rqstp;
 729         readdir->rd_fhp = &cstate->current_fh;
 730         return nfs_ok;
 731 }
 732
 733 static __be32
 734 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 735                struct nfsd4_readlink *readlink)
 736 {
 737         readlink->rl_rqstp = rqstp;
 738         readlink->rl_fhp = &cstate->current_fh;
 739         return nfs_ok;
 740 }
 741
 742 static __be32
 743 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 744              struct nfsd4_remove *remove)
 745 {
 746         __be32 status;
 747
 748         if (locks_in_grace())
 749                 return nfserr_grace;
 750         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 751                              remove->rm_name, remove->rm_namelen);
 752         if (!status) {
 753                 fh_unlock(&cstate->current_fh);
 754                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 755         }
 756         return status;
 757 }
 758
 759 static __be32
 760 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 761              struct nfsd4_rename *rename)
 762 {
 763         __be32 status = nfserr_nofilehandle;
 764
 765         if (!cstate->save_fh.fh_dentry)
 766                 return status;
 767         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 768                                         & NFSEXP_NOSUBTREECHECK))
 769                 return nfserr_grace;
 770         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 771                              rename->rn_snamelen, &cstate->current_fh,
 772                              rename->rn_tname, rename->rn_tnamelen);
 773
 774         /* the underlying filesystem returns different error's than required
 775          * by NFSv4. both save_fh and current_fh have been verified.. */
 776         if (status == nfserr_isdir)
 777                 status = nfserr_exist;
 778         else if ((status == nfserr_notdir) &&
 779                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 780                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 781                 status = nfserr_exist;
 782
 783         if (!status) {
 784                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 785                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 786         }
 787         return status;
 788 }
 789
 790 static __be32
 791 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 792               struct nfsd4_secinfo *secinfo)
 793 {
 794         struct svc_fh resfh;
 795         struct svc_export *exp;
 796         struct dentry *dentry;
 797         __be32 err;
 798
 799         fh_init(&resfh, NFS4_FHSIZE);
 800         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 801         if (err)
 802                 return err;
 803         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 804                                     secinfo->si_name, secinfo->si_namelen,
 805                                     &exp, &dentry);
 806         if (err)
 807                 return err;
 808         if (dentry->d_inode == NULL) {
 809                 exp_put(exp);
 810                 err = nfserr_noent;
 811         } else
 812                 secinfo->si_exp = exp;
 813         dput(dentry);
 814         if (cstate->minorversion)
 815                 /* See rfc 5661 section 2.6.3.1.1.8 */
 816                 fh_put(&cstate->current_fh);
 817         return err;
 818 }
 819
 820 static __be32
 821 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 822               struct nfsd4_secinfo_no_name *sin)
 823 {
 824         __be32 err;
 825
 826         switch (sin->sin_style) {
 827         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 828                 break;
 829         case NFS4_SECINFO_STYLE4_PARENT:
 830                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 831                 if (err)
 832                         return err;
 833                 break;
 834         default:
 835                 return nfserr_inval;
 836         }
 837         exp_get(cstate->current_fh.fh_export);
 838         sin->sin_exp = cstate->current_fh.fh_export;
 839         fh_put(&cstate->current_fh);
 840         return nfs_ok;
 841 }
 842
 843 static __be32
 844 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 845               struct nfsd4_setattr *setattr)
 846 {
 847         __be32 status = nfs_ok;
 848         int err;
 849
 850         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 851                 nfs4_lock_state();
 852                 status = nfs4_preprocess_stateid_op(cstate,
 853                         &setattr->sa_stateid, WR_STATE, NULL);
 854                 nfs4_unlock_state();
 855                 if (status) {
 856                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 857                         return status;
 858                 }
 859         }
 860         err = fh_want_write(&cstate->current_fh);
 861         if (err)
 862                 return nfserrno(err);
 863         status = nfs_ok;
 864
 865         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 866                                     nfsd_attrmask);
 867         if (status)
 868                 goto out;
 869
 870         if (setattr->sa_acl != NULL)
 871                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 872                                             setattr->sa_acl);
 873         if (status)
 874                 goto out;
 875         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 876                                 0, (time_t)0);
 877 out:
 878         fh_drop_write(&cstate->current_fh);
 879         return status;
 880 }
 881
 882 static __be32
 883 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 884             struct nfsd4_write *write)
 885 {
 886         stateid_t *stateid = &write->wr_stateid;
 887         struct file *filp = NULL;
 888         __be32 status = nfs_ok;
 889         unsigned long cnt;
 890
 891         /* no need to check permission - this will be done in nfsd_write() */
 892
 893         if (write->wr_offset >= OFFSET_MAX)
 894                 return nfserr_inval;
 895
 896         nfs4_lock_state();
 897         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 898         if (status) {
 899                 nfs4_unlock_state();
 900                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 901                 return status;
 902         }
 903         if (filp)
 904                 get_file(filp);
 905         nfs4_unlock_state();
 906
 907         cnt = write->wr_buflen;
 908         write->wr_how_written = write->wr_stable_how;
 909         gen_boot_verifier(&write->wr_verifier);
 910
 911         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 912                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 913                              &cnt, &write->wr_how_written);
 914         if (filp)
 915                 fput(filp);
 916
 917         write->wr_bytes_written = cnt;
 918
 919         return status;
 920 }
 921
 922 /* This routine never returns NFS_OK!  If there are no other errors, it
 923  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 924  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 925  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 926  */
 927 static __be32
 928 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 929              struct nfsd4_verify *verify)
 930 {
 931         __be32 *buf, *p;
 932         int count;
 933         __be32 status;
 934
 935         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 936         if (status)
 937                 return status;
 938
 939         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 940         if (status)
 941                 return status;
 942
 943         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 944             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 945                 return nfserr_inval;
 946         if (verify->ve_attrlen & 3)
 947                 return nfserr_inval;
 948
 949         /* count in words:
 950          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 951          */
 952         count = 4 + (verify->ve_attrlen >> 2);
 953         buf = kmalloc(count << 2, GFP_KERNEL);
 954         if (!buf)
 955                 return nfserr_jukebox;
 956
 957         status = nfsd4_encode_fattr(&cstate->current_fh,
 958                                     cstate->current_fh.fh_export,
 959                                     cstate->current_fh.fh_dentry, buf,
 960                                     &count, verify->ve_bmval,
 961                                     rqstp, 0);
 962
 963         /* this means that nfsd4_encode_fattr() ran out of space */
 964         if (status == nfserr_resource && count == 0)
 965                 status = nfserr_not_same;
 966         if (status)
 967                 goto out_kfree;
 968
 969         /* skip bitmap */
 970         p = buf + 1 + ntohl(buf[0]);
 971         status = nfserr_not_same;
 972         if (ntohl(*p++) != verify->ve_attrlen)
 973                 goto out_kfree;
 974         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 975                 status = nfserr_same;
 976
 977 out_kfree:
 978         kfree(buf);
 979         return status;
 980 }
 981
 982 static __be32
 983 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 984               struct nfsd4_verify *verify)
 985 {
 986         __be32 status;
 987
 988         status = _nfsd4_verify(rqstp, cstate, verify);
 989         return status == nfserr_not_same ? nfs_ok : status;
 990 }
 991
 992 static __be32
 993 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 994              struct nfsd4_verify *verify)
 995 {
 996         __be32 status;
 997
 998         status = _nfsd4_verify(rqstp, cstate, verify);
 999         return status == nfserr_same ? nfs_ok : status;
1000 }
1001
1002 /*
1003  * NULL call.
1004  */
1005 static __be32
1006 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1007 {
1008         return nfs_ok;
1009 }
1010
1011 static inline void nfsd4_increment_op_stats(u32 opnum)
1012 {
1013         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1014                 nfsdstats.nfs4_opcount[opnum]++;
1015 }
1016
1017 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1018                               void *);
1019 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1020 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1021 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1022
1023 enum nfsd4_op_flags {
1024         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1025         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1026         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1027         /* For rfc 5661 section 2.6.3.1.1: */
1028         OP_HANDLES_WRONGSEC = 1 << 3,
1029         OP_IS_PUTFH_LIKE = 1 << 4,
1030         /*
1031          * These are the ops whose result size we estimate before
1032          * encoding, to avoid performing an op then not being able to
1033          * respond or cache a response.  This includes writes and setattrs
1034          * as well as the operations usually called "nonidempotent":
1035          */
1036         OP_MODIFIES_SOMETHING = 1 << 5,
1037         /*
1038          * Cache compounds containing these ops in the xid-based drc:
1039          * We use the DRC for compounds containing non-idempotent
1040          * operations, *except* those that are 4.1-specific (since
1041          * sessions provide their own EOS), and except for stateful
1042          * operations other than setclientid and setclientid_confirm
1043          * (since sequence numbers provide EOS for open, lock, etc in
1044          * the v4.0 case).
1045          */
1046         OP_CACHEME = 1 << 6,
1047         /*
1048          * These are ops which clear current state id.
1049          */
1050         OP_CLEAR_STATEID = 1 << 7,
1051 };
1052
1053 struct nfsd4_operation {
1054         nfsd4op_func op_func;
1055         u32 op_flags;
1056         char *op_name;
1057         /* Try to get response size before operation */
1058         nfsd4op_rsize op_rsize_bop;
1059         stateid_setter op_get_currentstateid;
1060         stateid_getter op_set_currentstateid;
1061 };
1062
1063 static struct nfsd4_operation nfsd4_ops[];
1064
1065 #ifdef NFSD_DEBUG
1066 static const char *nfsd4_op_name(unsigned opnum);
1067 #endif
1068
1069 /*
1070  * Enforce NFSv4.1 COMPOUND ordering rules:
1071  *
1072  * Also note, enforced elsewhere:
1073  *      - SEQUENCE other than as first op results in
1074  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1075  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1076  *        (Enforced in nfsd4_bind_conn_to_session().)
1077  *      - DESTROY_SESSION must be the final operation in a compound, if
1078  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1079  *        (Enforced in nfsd4_destroy_session().)
1080  */
1081 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1082 {
1083         struct nfsd4_op *op = &args->ops[0];
1084
1085         /* These ordering requirements don't apply to NFSv4.0: */
1086         if (args->minorversion == 0)
1087                 return nfs_ok;
1088         /* This is weird, but OK, not our problem: */
1089         if (args->opcnt == 0)
1090                 return nfs_ok;
1091         if (op->status == nfserr_op_illegal)
1092                 return nfs_ok;
1093         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1094                 return nfserr_op_not_in_session;
1095         if (op->opnum == OP_SEQUENCE)
1096                 return nfs_ok;
1097         if (args->opcnt != 1)
1098                 return nfserr_not_only_op;
1099         return nfs_ok;
1100 }
1101
1102 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1103 {
1104         return &nfsd4_ops[op->opnum];
1105 }
1106
1107 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1108 {
1109         return OPDESC(op)->op_flags & OP_CACHEME;
1110 }
1111
1112 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1113 {
1114         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1115         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1116         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1117         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1118         struct nfsd4_operation *thisd;
1119         struct nfsd4_operation *nextd;
1120
1121         thisd = OPDESC(this);
1122         /*
1123          * Most ops check wronsec on our own; only the putfh-like ops
1124          * have special rules.
1125          */
1126         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1127                 return false;
1128         /*
1129          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1130          * put-filehandle operation if we're not going to use the
1131          * result:
1132          */
1133         if (argp->opcnt == resp->opcnt)
1134                 return false;
1135
1136         nextd = OPDESC(next);
1137         /*
1138          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1139          * errors themselves as necessary; others should check for them
1140          * now:
1141          */
1142         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1143 }
1144
1145 /*
1146  * COMPOUND call.
1147  */
1148 static __be32
1149 nfsd4_proc_compound(struct svc_rqst *rqstp,
1150                     struct nfsd4_compoundargs *args,
1151                     struct nfsd4_compoundres *resp)
1152 {
1153         struct nfsd4_op *op;
1154         struct nfsd4_operation *opdesc;
1155         struct nfsd4_compound_state *cstate = &resp->cstate;
1156         int             slack_bytes;
1157         u32             plen = 0;
1158         __be32          status;
1159
1160         resp->xbuf = &rqstp->rq_res;
1161         resp->p = rqstp->rq_res.head[0].iov_base +
1162                                                 rqstp->rq_res.head[0].iov_len;
1163         resp->tagp = resp->p;
1164         /* reserve space for: taglen, tag, and opcnt */
1165         resp->p += 2 + XDR_QUADLEN(args->taglen);
1166         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1167         resp->taglen = args->taglen;
1168         resp->tag = args->tag;
1169         resp->opcnt = 0;
1170         resp->rqstp = rqstp;
1171         resp->cstate.minorversion = args->minorversion;
1172         resp->cstate.replay_owner = NULL;
1173         resp->cstate.session = NULL;
1174         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1175         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1176         /*
1177          * Don't use the deferral mechanism for NFSv4; compounds make it
1178          * too hard to avoid non-idempotency problems.
1179          */
1180         rqstp->rq_usedeferral = 0;
1181
1182         /*
1183          * According to RFC3010, this takes precedence over all other errors.
1184          */
1185         status = nfserr_minor_vers_mismatch;
1186         if (args->minorversion > nfsd_supported_minorversion)
1187                 goto out;
1188
1189         status = nfs41_check_op_ordering(args);
1190         if (status) {
1191                 op = &args->ops[0];
1192                 op->status = status;
1193                 goto encode_op;
1194         }
1195
1196         while (!status && resp->opcnt < args->opcnt) {
1197                 op = &args->ops[resp->opcnt++];
1198
1199                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1200                         resp->opcnt, args->opcnt, op->opnum,
1201                         nfsd4_op_name(op->opnum));
1202                 /*
1203                  * The XDR decode routines may have pre-set op->status;
1204                  * for example, if there is a miscellaneous XDR error
1205                  * it will be set to nfserr_bad_xdr.
1206                  */
1207                 if (op->status)
1208                         goto encode_op;
1209
1210                 /* We must be able to encode a successful response to
1211                  * this operation, with enough room left over to encode a
1212                  * failed response to the next operation.  If we don't
1213                  * have enough room, fail with ERR_RESOURCE.
1214                  */
1215                 slack_bytes = (char *)resp->end - (char *)resp->p;
1216                 if (slack_bytes < COMPOUND_SLACK_SPACE
1217                                 + COMPOUND_ERR_SLACK_SPACE) {
1218                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1219                         op->status = nfserr_resource;
1220                         goto encode_op;
1221                 }
1222
1223                 opdesc = OPDESC(op);
1224
1225                 if (!cstate->current_fh.fh_dentry) {
1226                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1227                                 op->status = nfserr_nofilehandle;
1228                                 goto encode_op;
1229                         }
1230                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1231                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1232                         op->status = nfserr_moved;
1233                         goto encode_op;
1234                 }
1235
1236                 /* If op is non-idempotent */
1237                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1238                         plen = opdesc->op_rsize_bop(rqstp, op);
1239                         /*
1240                          * If there's still another operation, make sure
1241                          * we'll have space to at least encode an error:
1242                          */
1243                         if (resp->opcnt < args->opcnt)
1244                                 plen += COMPOUND_ERR_SLACK_SPACE;
1245                         op->status = nfsd4_check_resp_size(resp, plen);
1246                 }
1247
1248                 if (op->status)
1249                         goto encode_op;
1250
1251                 if (opdesc->op_func) {
1252                         if (opdesc->op_get_currentstateid)
1253                                 opdesc->op_get_currentstateid(cstate, &op->u);
1254                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1255                 } else
1256                         BUG_ON(op->status == nfs_ok);
1257
1258                 if (!op->status) {
1259                         if (opdesc->op_set_currentstateid)
1260                                 opdesc->op_set_currentstateid(cstate, &op->u);
1261
1262                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1263                                 clear_current_stateid(cstate);
1264
1265                         if (need_wrongsec_check(rqstp))
1266                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1267                 }
1268
1269 encode_op:
1270                 /* Only from SEQUENCE */
1271                 if (resp->cstate.status == nfserr_replay_cache) {
1272                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1273                         status = op->status;
1274                         goto out;
1275                 }
1276                 if (op->status == nfserr_replay_me) {
1277                         op->replay = &cstate->replay_owner->so_replay;
1278                         nfsd4_encode_replay(resp, op);
1279                         status = op->status = op->replay->rp_status;
1280                 } else {
1281                         nfsd4_encode_operation(resp, op);
1282                         status = op->status;
1283                 }
1284
1285                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1286                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1287                         be32_to_cpu(status));
1288
1289                 if (cstate->replay_owner) {
1290                         nfs4_unlock_state();
1291                         cstate->replay_owner = NULL;
1292                 }
1293                 /* XXX Ugh, we need to get rid of this kind of special case: */
1294                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1295                         fput(op->u.read.rd_filp);
1296
1297                 nfsd4_increment_op_stats(op->opnum);
1298         }
1299
1300         resp->cstate.status = status;
1301         fh_put(&resp->cstate.current_fh);
1302         fh_put(&resp->cstate.save_fh);
1303         BUG_ON(resp->cstate.replay_owner);
1304 out:
1305         /* Reset deferral mechanism for RPC deferrals */
1306         rqstp->rq_usedeferral = 1;
1307         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1308         return status;
1309 }
1310
1311 #define op_encode_hdr_size              (2)
1312 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1313 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1314 #define op_encode_change_info_maxsz     (5)
1315 #define nfs4_fattr_bitmap_maxsz         (4)
1316
1317 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1318 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1319
1320 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1321
1322 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1323 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1324                                          op_encode_ace_maxsz)
1325
1326 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1327
1328 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1329 {
1330         return (op_encode_hdr_size) * sizeof(__be32);
1331 }
1332
1333 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1334 {
1335         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1336 }
1337
1338 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1339 {
1340         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1341 }
1342
1343 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1344 {
1345         return (op_encode_hdr_size + op_encode_change_info_maxsz
1346                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1347 }
1348
1349 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1350 {
1351         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1352                 * sizeof(__be32);
1353 }
1354
1355 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1356 {
1357         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1358                 * sizeof(__be32);
1359 }
1360
1361 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1362 {
1363         return (op_encode_hdr_size + op_encode_stateid_maxsz
1364                 + op_encode_change_info_maxsz + 1
1365                 + nfs4_fattr_bitmap_maxsz
1366                 + op_encode_delegation_maxsz) * sizeof(__be32);
1367 }
1368
1369 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1370 {
1371         u32 maxcount = 0, rlen = 0;
1372
1373         maxcount = svc_max_payload(rqstp);
1374         rlen = op->u.read.rd_length;
1375
1376         if (rlen > maxcount)
1377                 rlen = maxcount;
1378
1379         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1380 }
1381
1382 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1383 {
1384         u32 rlen = op->u.readdir.rd_maxcount;
1385
1386         if (rlen > PAGE_SIZE)
1387                 rlen = PAGE_SIZE;
1388
1389         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1390                  * sizeof(__be32) + rlen;
1391 }
1392
1393 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1394 {
1395         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1396                 * sizeof(__be32);
1397 }
1398
1399 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1400 {
1401         return (op_encode_hdr_size + op_encode_change_info_maxsz
1402                 + op_encode_change_info_maxsz) * sizeof(__be32);
1403 }
1404
1405 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1406 {
1407         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1408 }
1409
1410 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1411 {
1412         return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1413                                                                 sizeof(__be32);
1414 }
1415
1416 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1417 {
1418         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1419 }
1420
1421 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1422 {
1423         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1424                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1425                 2 + /*eir_server_owner.so_minor_id */\
1426                 /* eir_server_owner.so_major_id<> */\
1427                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1428                 /* eir_server_scope<> */\
1429                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1430                 1 + /* eir_server_impl_id array length */\
1431                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1432 }
1433
1434 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1435 {
1436         return (op_encode_hdr_size + \
1437                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1438                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1439 }
1440
1441 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1442 {
1443         return (op_encode_hdr_size + \
1444                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1445                 2 + /* csr_sequence, csr_flags */\
1446                 op_encode_channel_attrs_maxsz + \
1447                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1448 }
1449
1450 static struct nfsd4_operation nfsd4_ops[] = {
1451         [OP_ACCESS] = {
1452                 .op_func = (nfsd4op_func)nfsd4_access,
1453                 .op_name = "OP_ACCESS",
1454         },
1455         [OP_CLOSE] = {
1456                 .op_func = (nfsd4op_func)nfsd4_close,
1457                 .op_flags = OP_MODIFIES_SOMETHING,
1458                 .op_name = "OP_CLOSE",
1459                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1460                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1461                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1462         },
1463         [OP_COMMIT] = {
1464                 .op_func = (nfsd4op_func)nfsd4_commit,
1465                 .op_flags = OP_MODIFIES_SOMETHING,
1466                 .op_name = "OP_COMMIT",
1467                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1468         },
1469         [OP_CREATE] = {
1470                 .op_func = (nfsd4op_func)nfsd4_create,
1471                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1472                 .op_name = "OP_CREATE",
1473                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1474         },
1475         [OP_DELEGRETURN] = {
1476                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1477                 .op_flags = OP_MODIFIES_SOMETHING,
1478                 .op_name = "OP_DELEGRETURN",
1479                 .op_rsize_bop = nfsd4_only_status_rsize,
1480                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1481         },
1482         [OP_GETATTR] = {
1483                 .op_func = (nfsd4op_func)nfsd4_getattr,
1484                 .op_flags = ALLOWED_ON_ABSENT_FS,
1485                 .op_name = "OP_GETATTR",
1486         },
1487         [OP_GETFH] = {
1488                 .op_func = (nfsd4op_func)nfsd4_getfh,
1489                 .op_name = "OP_GETFH",
1490         },
1491         [OP_LINK] = {
1492                 .op_func = (nfsd4op_func)nfsd4_link,
1493                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1494                                 | OP_CACHEME,
1495                 .op_name = "OP_LINK",
1496                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1497         },
1498         [OP_LOCK] = {
1499                 .op_func = (nfsd4op_func)nfsd4_lock,
1500                 .op_flags = OP_MODIFIES_SOMETHING,
1501                 .op_name = "OP_LOCK",
1502                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1503                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1504         },
1505         [OP_LOCKT] = {
1506                 .op_func = (nfsd4op_func)nfsd4_lockt,
1507                 .op_name = "OP_LOCKT",
1508         },
1509         [OP_LOCKU] = {
1510                 .op_func = (nfsd4op_func)nfsd4_locku,
1511                 .op_flags = OP_MODIFIES_SOMETHING,
1512                 .op_name = "OP_LOCKU",
1513                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1514                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1515         },
1516         [OP_LOOKUP] = {
1517                 .op_func = (nfsd4op_func)nfsd4_lookup,
1518                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1519                 .op_name = "OP_LOOKUP",
1520         },
1521         [OP_LOOKUPP] = {
1522                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1523                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1524                 .op_name = "OP_LOOKUPP",
1525         },
1526         [OP_NVERIFY] = {
1527                 .op_func = (nfsd4op_func)nfsd4_nverify,
1528                 .op_name = "OP_NVERIFY",
1529         },
1530         [OP_OPEN] = {
1531                 .op_func = (nfsd4op_func)nfsd4_open,
1532                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1533                 .op_name = "OP_OPEN",
1534                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1535                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1536         },
1537         [OP_OPEN_CONFIRM] = {
1538                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1539                 .op_flags = OP_MODIFIES_SOMETHING,
1540                 .op_name = "OP_OPEN_CONFIRM",
1541                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1542         },
1543         [OP_OPEN_DOWNGRADE] = {
1544                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1545                 .op_flags = OP_MODIFIES_SOMETHING,
1546                 .op_name = "OP_OPEN_DOWNGRADE",
1547                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1548                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1549                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1550         },
1551         [OP_PUTFH] = {
1552                 .op_func = (nfsd4op_func)nfsd4_putfh,
1553                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1554                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1555                                 | OP_CLEAR_STATEID,
1556                 .op_name = "OP_PUTFH",
1557                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1558         },
1559         [OP_PUTPUBFH] = {
1560                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1561                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1562                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1563                                 | OP_CLEAR_STATEID,
1564                 .op_name = "OP_PUTPUBFH",
1565                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1566         },
1567         [OP_PUTROOTFH] = {
1568                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1569                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1570                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1571                                 | OP_CLEAR_STATEID,
1572                 .op_name = "OP_PUTROOTFH",
1573                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1574         },
1575         [OP_READ] = {
1576                 .op_func = (nfsd4op_func)nfsd4_read,
1577                 .op_flags = OP_MODIFIES_SOMETHING,
1578                 .op_name = "OP_READ",
1579                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1580                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1581         },
1582         [OP_READDIR] = {
1583                 .op_func = (nfsd4op_func)nfsd4_readdir,
1584                 .op_flags = OP_MODIFIES_SOMETHING,
1585                 .op_name = "OP_READDIR",
1586                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1587         },
1588         [OP_READLINK] = {
1589                 .op_func = (nfsd4op_func)nfsd4_readlink,
1590                 .op_name = "OP_READLINK",
1591         },
1592         [OP_REMOVE] = {
1593                 .op_func = (nfsd4op_func)nfsd4_remove,
1594                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1595                 .op_name = "OP_REMOVE",
1596                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1597         },
1598         [OP_RENAME] = {
1599                 .op_func = (nfsd4op_func)nfsd4_rename,
1600                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1601                 .op_name = "OP_RENAME",
1602                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1603         },
1604         [OP_RENEW] = {
1605                 .op_func = (nfsd4op_func)nfsd4_renew,
1606                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1607                                 | OP_MODIFIES_SOMETHING,
1608                 .op_name = "OP_RENEW",
1609                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1610
1611         },
1612         [OP_RESTOREFH] = {
1613                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1614                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1615                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1616                 .op_name = "OP_RESTOREFH",
1617                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1618         },
1619         [OP_SAVEFH] = {
1620                 .op_func = (nfsd4op_func)nfsd4_savefh,
1621                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1622                 .op_name = "OP_SAVEFH",
1623                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1624         },
1625         [OP_SECINFO] = {
1626                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1627                 .op_flags = OP_HANDLES_WRONGSEC,
1628                 .op_name = "OP_SECINFO",
1629         },
1630         [OP_SETATTR] = {
1631                 .op_func = (nfsd4op_func)nfsd4_setattr,
1632                 .op_name = "OP_SETATTR",
1633                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1634                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1635                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1636         },
1637         [OP_SETCLIENTID] = {
1638                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1639                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1640                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1641                 .op_name = "OP_SETCLIENTID",
1642                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1643         },
1644         [OP_SETCLIENTID_CONFIRM] = {
1645                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1646                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1647                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1648                 .op_name = "OP_SETCLIENTID_CONFIRM",
1649                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1650         },
1651         [OP_VERIFY] = {
1652                 .op_func = (nfsd4op_func)nfsd4_verify,
1653                 .op_name = "OP_VERIFY",
1654         },
1655         [OP_WRITE] = {
1656                 .op_func = (nfsd4op_func)nfsd4_write,
1657                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1658                 .op_name = "OP_WRITE",
1659                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1660                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1661         },
1662         [OP_RELEASE_LOCKOWNER] = {
1663                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1664                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1665                                 | OP_MODIFIES_SOMETHING,
1666                 .op_name = "OP_RELEASE_LOCKOWNER",
1667                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1668         },
1669
1670         /* NFSv4.1 operations */
1671         [OP_EXCHANGE_ID] = {
1672                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1673                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1674                                 | OP_MODIFIES_SOMETHING,
1675                 .op_name = "OP_EXCHANGE_ID",
1676                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1677         },
1678         [OP_BIND_CONN_TO_SESSION] = {
1679                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1680                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1681                                 | OP_MODIFIES_SOMETHING,
1682                 .op_name = "OP_BIND_CONN_TO_SESSION",
1683                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1684         },
1685         [OP_CREATE_SESSION] = {
1686                 .op_func = (nfsd4op_func)nfsd4_create_session,
1687                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1688                                 | OP_MODIFIES_SOMETHING,
1689                 .op_name = "OP_CREATE_SESSION",
1690                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1691         },
1692         [OP_DESTROY_SESSION] = {
1693                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1694                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1695                                 | OP_MODIFIES_SOMETHING,
1696                 .op_name = "OP_DESTROY_SESSION",
1697                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1698         },
1699         [OP_SEQUENCE] = {
1700                 .op_func = (nfsd4op_func)nfsd4_sequence,
1701                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1702                 .op_name = "OP_SEQUENCE",
1703         },
1704         [OP_DESTROY_CLIENTID] = {
1705                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1706                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1707                                 | OP_MODIFIES_SOMETHING,
1708                 .op_name = "OP_DESTROY_CLIENTID",
1709                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1710         },
1711         [OP_RECLAIM_COMPLETE] = {
1712                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1713                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1714                 .op_name = "OP_RECLAIM_COMPLETE",
1715                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1716         },
1717         [OP_SECINFO_NO_NAME] = {
1718                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1719                 .op_flags = OP_HANDLES_WRONGSEC,
1720                 .op_name = "OP_SECINFO_NO_NAME",
1721         },
1722         [OP_TEST_STATEID] = {
1723                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1724                 .op_flags = ALLOWED_WITHOUT_FH,
1725                 .op_name = "OP_TEST_STATEID",
1726         },
1727         [OP_FREE_STATEID] = {
1728                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1729                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1730                 .op_name = "OP_FREE_STATEID",
1731                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1732         },
1733 };
1734
1735 #ifdef NFSD_DEBUG
1736 static const char *nfsd4_op_name(unsigned opnum)
1737 {
1738         if (opnum < ARRAY_SIZE(nfsd4_ops))
1739                 return nfsd4_ops[opnum].op_name;
1740         return "unknown_operation";
1741 }
1742 #endif
1743
1744 #define nfsd4_voidres                   nfsd4_voidargs
1745 struct nfsd4_voidargs { int dummy; };
1746
1747 static struct svc_procedure             nfsd_procedures4[2] = {
1748         [NFSPROC4_NULL] = {
1749                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1750                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1751                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1752                 .pc_ressize = sizeof(struct nfsd4_voidres),
1753                 .pc_cachetype = RC_NOCACHE,
1754                 .pc_xdrressize = 1,
1755         },
1756         [NFSPROC4_COMPOUND] = {
1757                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1758                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1759                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1760                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1761                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1762                 .pc_release = nfsd4_release_compoundargs,
1763                 .pc_cachetype = RC_NOCACHE,
1764                 .pc_xdrressize = NFSD_BUFSIZE/4,
1765         },
1766 };
1767
1768 struct svc_version      nfsd_version4 = {
1769                 .vs_vers        = 4,
1770                 .vs_nproc       = 2,
1771                 .vs_proc        = nfsd_procedures4,
1772                 .vs_dispatch    = nfsd_dispatch,
1773                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1774 };
1775
1776 /*
1777  * Local variables:
1778  *  c-basic-offset: 8
1779  * End:
1780  */