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 #include "netns.h"
  44
  45 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  46
  47 static u32 nfsd_attrmask[] = {
  48         NFSD_WRITEABLE_ATTRS_WORD0,
  49         NFSD_WRITEABLE_ATTRS_WORD1,
  50         NFSD_WRITEABLE_ATTRS_WORD2
  51 };
  52
  53 static u32 nfsd41_ex_attrmask[] = {
  54         NFSD_SUPPATTR_EXCLCREAT_WORD0,
  55         NFSD_SUPPATTR_EXCLCREAT_WORD1,
  56         NFSD_SUPPATTR_EXCLCREAT_WORD2
  57 };
  58
  59 static __be32
  60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  61                    u32 *bmval, u32 *writable)
  62 {
  63         struct dentry *dentry = cstate->current_fh.fh_dentry;
  64
  65         /*
  66          * Check about attributes are supported by the NFSv4 server or not.
  67          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  68          */
  69         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  70             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  71             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  72                 return nfserr_attrnotsupp;
  73
  74         /*
  75          * Check FATTR4_WORD0_ACL can be supported
  76          * in current environment or not.
  77          */
  78         if (bmval[0] & FATTR4_WORD0_ACL) {
  79                 if (!IS_POSIXACL(dentry->d_inode))
  80                         return nfserr_attrnotsupp;
  81         }
  82
  83         /*
  84          * According to spec, read-only attributes return ERR_INVAL.
  85          */
  86         if (writable) {
  87                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  88                     (bmval[2] & ~writable[2]))
  89                         return nfserr_inval;
  90         }
  91
  92         return nfs_ok;
  93 }
  94
  95 static __be32
  96 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
  97         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
  98 {
  99         __be32 status = nfs_ok;
 100
 101         if (open->op_create == NFS4_OPEN_CREATE) {
 102                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
 103                     || open->op_createmode == NFS4_CREATE_GUARDED)
 104                         status = check_attr_support(rqstp, cstate,
 105                                         open->op_bmval, nfsd_attrmask);
 106                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 107                         status = check_attr_support(rqstp, cstate,
 108                                         open->op_bmval, nfsd41_ex_attrmask);
 109         }
 110
 111         return status;
 112 }
 113
 114 static int
 115 is_create_with_attrs(struct nfsd4_open *open)
 116 {
 117         return open->op_create == NFS4_OPEN_CREATE
 118                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
 119                     || open->op_createmode == NFS4_CREATE_GUARDED
 120                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 121 }
 122
 123 /*
 124  * if error occurs when setting the acl, just clear the acl bit
 125  * in the returned attr bitmap.
 126  */
 127 static void
 128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 129                 struct nfs4_acl *acl, u32 *bmval)
 130 {
 131         __be32 status;
 132
 133         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 134         if (status)
 135                 /*
 136                  * We should probably fail the whole open at this point,
 137                  * but we've already created the file, so it's too late;
 138                  * So this seems the least of evils:
 139                  */
 140                 bmval[0] &= ~FATTR4_WORD0_ACL;
 141 }
 142
 143 static inline void
 144 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 145 {
 146         fh_put(dst);
 147         dget(src->fh_dentry);
 148         if (src->fh_export)
 149                 cache_get(&src->fh_export->h);
 150         *dst = *src;
 151 }
 152
 153 static __be32
 154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 155 {
 156         __be32 status;
 157
 158         if (open->op_truncate &&
 159                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 160                 return nfserr_inval;
 161
 162         accmode |= NFSD_MAY_READ_IF_EXEC;
 163
 164         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 165                 accmode |= NFSD_MAY_READ;
 166         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 167                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 168         if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 169                 accmode |= NFSD_MAY_WRITE;
 170
 171         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 172
 173         return status;
 174 }
 175
 176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 177 {
 178         umode_t mode = fh->fh_dentry->d_inode->i_mode;
 179
 180         if (S_ISREG(mode))
 181                 return nfs_ok;
 182         if (S_ISDIR(mode))
 183                 return nfserr_isdir;
 184         /*
 185          * Using err_symlink as our catch-all case may look odd; but
 186          * there's no other obvious error for this case in 4.0, and we
 187          * happen to know that it will cause the linux v4 client to do
 188          * the right thing on attempts to open something other than a
 189          * regular file.
 190          */
 191         return nfserr_symlink;
 192 }
 193
 194 static __be32
 195 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 196 {
 197         struct svc_fh *resfh;
 198         int accmode;
 199         __be32 status;
 200
 201         resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 202         if (!resfh)
 203                 return nfserr_jukebox;
 204         fh_init(resfh, NFS4_FHSIZE);
 205         open->op_truncate = 0;
 206
 207         if (open->op_create) {
 208                 /* FIXME: check session persistence and pnfs flags.
 209                  * The nfsv4.1 spec requires the following semantics:
 210                  *
 211                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 212                  * Reply Cache  | server |                 |
 213                  * -------------+--------+-----------------+--------------------
 214                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 215                  *              |        |                 | (SHOULD)
 216                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 217                  *              |        |                 | (SHOULD NOT)
 218                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 219                  * yes          | no     | GUARDED4        | GUARDED4
 220                  * yes          | yes    | GUARDED4        | GUARDED4
 221                  */
 222
 223                 /*
 224                  * Note: create modes (UNCHECKED,GUARDED...) are the same
 225                  * in NFSv4 as in v3 except EXCLUSIVE4_1.
 226                  */
 227                 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 228                                         open->op_fname.len, &open->op_iattr,
 229                                         resfh, open->op_createmode,
 230                                         (u32 *)open->op_verf.data,
 231                                         &open->op_truncate, &open->op_created);
 232
 233                 /*
 234                  * Following rfc 3530 14.2.16, use the returned bitmask
 235                  * to indicate which attributes we used to store the
 236                  * verifier:
 237                  */
 238                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 239                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 240                                                         FATTR4_WORD1_TIME_MODIFY);
 241         } else {
 242                 status = nfsd_lookup(rqstp, current_fh,
 243                                      open->op_fname.data, open->op_fname.len, resfh);
 244                 fh_unlock(current_fh);
 245         }
 246         if (status)
 247                 goto out;
 248         status = nfsd_check_obj_isreg(resfh);
 249         if (status)
 250                 goto out;
 251
 252         if (is_create_with_attrs(open) && open->op_acl != NULL)
 253                 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
 254
 255         /* set reply cache */
 256         fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 257                         &resfh->fh_handle);
 258         accmode = NFSD_MAY_NOP;
 259         if (open->op_created)
 260                 accmode |= NFSD_MAY_OWNER_OVERRIDE;
 261         status = do_open_permission(rqstp, resfh, open, accmode);
 262         set_change_info(&open->op_cinfo, current_fh);
 263         fh_dup2(current_fh, resfh);
 264 out:
 265         fh_put(resfh);
 266         kfree(resfh);
 267         return status;
 268 }
 269
 270 static __be32
 271 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 272 {
 273         __be32 status;
 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         status = do_open_permission(rqstp, current_fh, open,
 289                                     NFSD_MAY_OWNER_OVERRIDE);
 290
 291         return status;
 292 }
 293
 294 static void
 295 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 296 {
 297         struct nfsd4_sessionid *sid =
 298                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 299
 300         clid->cl_boot = sid->clientid.cl_boot;
 301         clid->cl_id = sid->clientid.cl_id;
 302 }
 303
 304 static __be32
 305 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 306            struct nfsd4_open *open)
 307 {
 308         __be32 status;
 309         struct nfsd4_compoundres *resp;
 310         struct net *net = SVC_NET(rqstp);
 311         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 312
 313         dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 314                 (int)open->op_fname.len, open->op_fname.data,
 315                 open->op_openowner);
 316
 317         /* This check required by spec. */
 318         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 319                 return nfserr_inval;
 320
 321         open->op_created = 0;
 322         /*
 323          * RFC5661 18.51.3
 324          * Before RECLAIM_COMPLETE done, server should deny new lock
 325          */
 326         if (nfsd4_has_session(cstate) &&
 327             !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 328                       &cstate->session->se_client->cl_flags) &&
 329             open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 330                 return nfserr_grace;
 331
 332         if (nfsd4_has_session(cstate))
 333                 copy_clientid(&open->op_clientid, cstate->session);
 334
 335         nfs4_lock_state();
 336
 337         /* check seqid for replay. set nfs4_owner */
 338         resp = rqstp->rq_resp;
 339         status = nfsd4_process_open1(&resp->cstate, open, nn);
 340         if (status == nfserr_replay_me) {
 341                 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 342                 fh_put(&cstate->current_fh);
 343                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 344                                 &rp->rp_openfh);
 345                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 346                 if (status)
 347                         dprintk("nfsd4_open: replay failed"
 348                                 " restoring previous filehandle\n");
 349                 else
 350                         status = nfserr_replay_me;
 351         }
 352         if (status)
 353                 goto out;
 354
 355         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 356         if (status)
 357                 goto out;
 358
 359         /* Openowner is now set, so sequence id will get bumped.  Now we need
 360          * these checks before we do any creates: */
 361         status = nfserr_grace;
 362         if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 363                 goto out;
 364         status = nfserr_no_grace;
 365         if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 366                 goto out;
 367
 368         switch (open->op_claim_type) {
 369                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 370                 case NFS4_OPEN_CLAIM_NULL:
 371                         status = do_open_lookup(rqstp, &cstate->current_fh,
 372                                                 open);
 373                         if (status)
 374                                 goto out;
 375                         break;
 376                 case NFS4_OPEN_CLAIM_PREVIOUS:
 377                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 378                         status = nfs4_check_open_reclaim(&open->op_clientid,
 379                                                          cstate->minorversion,
 380                                                          nn);
 381                         if (status)
 382                                 goto out;
 383                 case NFS4_OPEN_CLAIM_FH:
 384                 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 385                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 386                                                  open);
 387                         if (status)
 388                                 goto out;
 389                         break;
 390                 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 391                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 392                         open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 393                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 394                                 open->op_claim_type);
 395                         status = nfserr_notsupp;
 396                         goto out;
 397                 default:
 398                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 399                                 open->op_claim_type);
 400                         status = nfserr_inval;
 401                         goto out;
 402         }
 403         /*
 404          * nfsd4_process_open2() does the actual opening of the file.  If
 405          * successful, it (1) truncates the file if open->op_truncate was
 406          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 407          */
 408         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 409         WARN_ON(status && open->op_created);
 410 out:
 411         nfsd4_cleanup_open_state(open, status);
 412         if (open->op_openowner)
 413                 cstate->replay_owner = &open->op_openowner->oo_owner;
 414         else
 415                 nfs4_unlock_state();
 416         return status;
 417 }
 418
 419 /*
 420  * filehandle-manipulating ops.
 421  */
 422 static __be32
 423 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 424             struct svc_fh **getfh)
 425 {
 426         if (!cstate->current_fh.fh_dentry)
 427                 return nfserr_nofilehandle;
 428
 429         *getfh = &cstate->current_fh;
 430         return nfs_ok;
 431 }
 432
 433 static __be32
 434 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 435             struct nfsd4_putfh *putfh)
 436 {
 437         fh_put(&cstate->current_fh);
 438         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 439         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 440                putfh->pf_fhlen);
 441         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 442 }
 443
 444 static __be32
 445 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 446                 void *arg)
 447 {
 448         __be32 status;
 449
 450         fh_put(&cstate->current_fh);
 451         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 452         return status;
 453 }
 454
 455 static __be32
 456 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 457                 void *arg)
 458 {
 459         if (!cstate->save_fh.fh_dentry)
 460                 return nfserr_restorefh;
 461
 462         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 463         if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 464                 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 465                 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 466         }
 467         return nfs_ok;
 468 }
 469
 470 static __be32
 471 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 472              void *arg)
 473 {
 474         if (!cstate->current_fh.fh_dentry)
 475                 return nfserr_nofilehandle;
 476
 477         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 478         if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 479                 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 480                 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 481         }
 482         return nfs_ok;
 483 }
 484
 485 /*
 486  * misc nfsv4 ops
 487  */
 488 static __be32
 489 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 490              struct nfsd4_access *access)
 491 {
 492         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 493                 return nfserr_inval;
 494
 495         access->ac_resp_access = access->ac_req_access;
 496         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 497                            &access->ac_supported);
 498 }
 499
 500 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
 501 {
 502         __be32 verf[2];
 503         struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 504
 505         verf[0] = (__be32)nn->nfssvc_boot.tv_sec;
 506         verf[1] = (__be32)nn->nfssvc_boot.tv_usec;
 507         memcpy(verifier->data, verf, sizeof(verifier->data));
 508 }
 509
 510 static __be32
 511 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 512              struct nfsd4_commit *commit)
 513 {
 514         gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
 515         return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 516                              commit->co_count);
 517 }
 518
 519 static __be32
 520 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 521              struct nfsd4_create *create)
 522 {
 523         struct svc_fh resfh;
 524         __be32 status;
 525         dev_t rdev;
 526
 527         fh_init(&resfh, NFS4_FHSIZE);
 528
 529         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 530                            NFSD_MAY_CREATE);
 531         if (status)
 532                 return status;
 533
 534         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 535                                     nfsd_attrmask);
 536         if (status)
 537                 return status;
 538
 539         switch (create->cr_type) {
 540         case NF4LNK:
 541                 /* ugh! we have to null-terminate the linktext, or
 542                  * vfs_symlink() will choke.  it is always safe to
 543                  * null-terminate by brute force, since at worst we
 544                  * will overwrite the first byte of the create namelen
 545                  * in the XDR buffer, which has already been extracted
 546                  * during XDR decode.
 547                  */
 548                 create->cr_linkname[create->cr_linklen] = 0;
 549
 550                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 551                                       create->cr_name, create->cr_namelen,
 552                                       create->cr_linkname, create->cr_linklen,
 553                                       &resfh, &create->cr_iattr);
 554                 break;
 555
 556         case NF4BLK:
 557                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 558                 if (MAJOR(rdev) != create->cr_specdata1 ||
 559                     MINOR(rdev) != create->cr_specdata2)
 560                         return nfserr_inval;
 561                 status = nfsd_create(rqstp, &cstate->current_fh,
 562                                      create->cr_name, create->cr_namelen,
 563                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 564                 break;
 565
 566         case NF4CHR:
 567                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 568                 if (MAJOR(rdev) != create->cr_specdata1 ||
 569                     MINOR(rdev) != create->cr_specdata2)
 570                         return nfserr_inval;
 571                 status = nfsd_create(rqstp, &cstate->current_fh,
 572                                      create->cr_name, create->cr_namelen,
 573                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 574                 break;
 575
 576         case NF4SOCK:
 577                 status = nfsd_create(rqstp, &cstate->current_fh,
 578                                      create->cr_name, create->cr_namelen,
 579                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 580                 break;
 581
 582         case NF4FIFO:
 583                 status = nfsd_create(rqstp, &cstate->current_fh,
 584                                      create->cr_name, create->cr_namelen,
 585                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 586                 break;
 587
 588         case NF4DIR:
 589                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 590                 status = nfsd_create(rqstp, &cstate->current_fh,
 591                                      create->cr_name, create->cr_namelen,
 592                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 593                 break;
 594
 595         default:
 596                 status = nfserr_badtype;
 597         }
 598
 599         if (status)
 600                 goto out;
 601
 602         if (create->cr_acl != NULL)
 603                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 604                                 create->cr_bmval);
 605
 606         fh_unlock(&cstate->current_fh);
 607         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 608         fh_dup2(&cstate->current_fh, &resfh);
 609 out:
 610         fh_put(&resfh);
 611         return status;
 612 }
 613
 614 static __be32
 615 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 616               struct nfsd4_getattr *getattr)
 617 {
 618         __be32 status;
 619
 620         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 621         if (status)
 622                 return status;
 623
 624         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 625                 return nfserr_inval;
 626
 627         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 628         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 629         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 630
 631         getattr->ga_fhp = &cstate->current_fh;
 632         return nfs_ok;
 633 }
 634
 635 static __be32
 636 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 637            struct nfsd4_link *link)
 638 {
 639         __be32 status = nfserr_nofilehandle;
 640
 641         if (!cstate->save_fh.fh_dentry)
 642                 return status;
 643         status = nfsd_link(rqstp, &cstate->current_fh,
 644                            link->li_name, link->li_namelen, &cstate->save_fh);
 645         if (!status)
 646                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 647         return status;
 648 }
 649
 650 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 651 {
 652         struct svc_fh tmp_fh;
 653         __be32 ret;
 654
 655         fh_init(&tmp_fh, NFS4_FHSIZE);
 656         ret = exp_pseudoroot(rqstp, &tmp_fh);
 657         if (ret)
 658                 return ret;
 659         if (tmp_fh.fh_dentry == fh->fh_dentry) {
 660                 fh_put(&tmp_fh);
 661                 return nfserr_noent;
 662         }
 663         fh_put(&tmp_fh);
 664         return nfsd_lookup(rqstp, fh, "..", 2, fh);
 665 }
 666
 667 static __be32
 668 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 669               void *arg)
 670 {
 671         return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 672 }
 673
 674 static __be32
 675 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 676              struct nfsd4_lookup *lookup)
 677 {
 678         return nfsd_lookup(rqstp, &cstate->current_fh,
 679                            lookup->lo_name, lookup->lo_len,
 680                            &cstate->current_fh);
 681 }
 682
 683 static __be32
 684 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 685            struct nfsd4_read *read)
 686 {
 687         __be32 status;
 688
 689         /* no need to check permission - this will be done in nfsd_read() */
 690
 691         read->rd_filp = NULL;
 692         if (read->rd_offset >= OFFSET_MAX)
 693                 return nfserr_inval;
 694
 695         /*
 696          * If we do a zero copy read, then a client will see read data
 697          * that reflects the state of the file *after* performing the
 698          * following compound.
 699          *
 700          * To ensure proper ordering, we therefore turn off zero copy if
 701          * the client wants us to do more in this compound:
 702          */
 703         if (!nfsd4_last_compound_op(rqstp))
 704                 rqstp->rq_splice_ok = false;
 705
 706         nfs4_lock_state();
 707         /* check stateid */
 708         if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 709                                                  cstate, &read->rd_stateid,
 710                                                  RD_STATE, &read->rd_filp))) {
 711                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 712                 goto out;
 713         }
 714         if (read->rd_filp)
 715                 get_file(read->rd_filp);
 716         status = nfs_ok;
 717 out:
 718         nfs4_unlock_state();
 719         read->rd_rqstp = rqstp;
 720         read->rd_fhp = &cstate->current_fh;
 721         return status;
 722 }
 723
 724 static __be32
 725 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 726               struct nfsd4_readdir *readdir)
 727 {
 728         u64 cookie = readdir->rd_cookie;
 729         static const nfs4_verifier zeroverf;
 730
 731         /* no need to check permission - this will be done in nfsd_readdir() */
 732
 733         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 734                 return nfserr_inval;
 735
 736         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 737         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 738         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 739
 740         if ((cookie == 1) || (cookie == 2) ||
 741             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 742                 return nfserr_bad_cookie;
 743
 744         readdir->rd_rqstp = rqstp;
 745         readdir->rd_fhp = &cstate->current_fh;
 746         return nfs_ok;
 747 }
 748
 749 static __be32
 750 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 751                struct nfsd4_readlink *readlink)
 752 {
 753         readlink->rl_rqstp = rqstp;
 754         readlink->rl_fhp = &cstate->current_fh;
 755         return nfs_ok;
 756 }
 757
 758 static __be32
 759 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 760              struct nfsd4_remove *remove)
 761 {
 762         __be32 status;
 763
 764         if (locks_in_grace(SVC_NET(rqstp)))
 765                 return nfserr_grace;
 766         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 767                              remove->rm_name, remove->rm_namelen);
 768         if (!status) {
 769                 fh_unlock(&cstate->current_fh);
 770                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 771         }
 772         return status;
 773 }
 774
 775 static __be32
 776 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 777              struct nfsd4_rename *rename)
 778 {
 779         __be32 status = nfserr_nofilehandle;
 780
 781         if (!cstate->save_fh.fh_dentry)
 782                 return status;
 783         if (locks_in_grace(SVC_NET(rqstp)) &&
 784                 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
 785                 return nfserr_grace;
 786         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 787                              rename->rn_snamelen, &cstate->current_fh,
 788                              rename->rn_tname, rename->rn_tnamelen);
 789
 790         /* the underlying filesystem returns different error's than required
 791          * by NFSv4. both save_fh and current_fh have been verified.. */
 792         if (status == nfserr_isdir)
 793                 status = nfserr_exist;
 794         else if ((status == nfserr_notdir) &&
 795                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 796                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 797                 status = nfserr_exist;
 798
 799         if (!status) {
 800                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 801                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 802         }
 803         return status;
 804 }
 805
 806 static __be32
 807 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 808               struct nfsd4_secinfo *secinfo)
 809 {
 810         struct svc_fh resfh;
 811         struct svc_export *exp;
 812         struct dentry *dentry;
 813         __be32 err;
 814
 815         fh_init(&resfh, NFS4_FHSIZE);
 816         err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 817         if (err)
 818                 return err;
 819         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 820                                     secinfo->si_name, secinfo->si_namelen,
 821                                     &exp, &dentry);
 822         if (err)
 823                 return err;
 824         if (dentry->d_inode == NULL) {
 825                 exp_put(exp);
 826                 err = nfserr_noent;
 827         } else
 828                 secinfo->si_exp = exp;
 829         dput(dentry);
 830         if (cstate->minorversion)
 831                 /* See rfc 5661 section 2.6.3.1.1.8 */
 832                 fh_put(&cstate->current_fh);
 833         return err;
 834 }
 835
 836 static __be32
 837 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 838               struct nfsd4_secinfo_no_name *sin)
 839 {
 840         __be32 err;
 841
 842         switch (sin->sin_style) {
 843         case NFS4_SECINFO_STYLE4_CURRENT_FH:
 844                 break;
 845         case NFS4_SECINFO_STYLE4_PARENT:
 846                 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 847                 if (err)
 848                         return err;
 849                 break;
 850         default:
 851                 return nfserr_inval;
 852         }
 853         exp_get(cstate->current_fh.fh_export);
 854         sin->sin_exp = cstate->current_fh.fh_export;
 855         fh_put(&cstate->current_fh);
 856         return nfs_ok;
 857 }
 858
 859 static __be32
 860 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 861               struct nfsd4_setattr *setattr)
 862 {
 863         __be32 status = nfs_ok;
 864         int err;
 865
 866         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 867                 nfs4_lock_state();
 868                 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
 869                         &setattr->sa_stateid, WR_STATE, NULL);
 870                 nfs4_unlock_state();
 871                 if (status) {
 872                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 873                         return status;
 874                 }
 875         }
 876         err = fh_want_write(&cstate->current_fh);
 877         if (err)
 878                 return nfserrno(err);
 879         status = nfs_ok;
 880
 881         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 882                                     nfsd_attrmask);
 883         if (status)
 884                 goto out;
 885
 886         if (setattr->sa_acl != NULL)
 887                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 888                                             setattr->sa_acl);
 889         if (status)
 890                 goto out;
 891         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 892                                 0, (time_t)0);
 893 out:
 894         fh_drop_write(&cstate->current_fh);
 895         return status;
 896 }
 897
 898 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
 899 {
 900         int i = 1;
 901         int buflen = write->wr_buflen;
 902
 903         vec[0].iov_base = write->wr_head.iov_base;
 904         vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
 905         buflen -= vec[0].iov_len;
 906
 907         while (buflen) {
 908                 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
 909                 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
 910                 buflen -= vec[i].iov_len;
 911                 i++;
 912         }
 913         return i;
 914 }
 915
 916 static __be32
 917 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 918             struct nfsd4_write *write)
 919 {
 920         stateid_t *stateid = &write->wr_stateid;
 921         struct file *filp = NULL;
 922         __be32 status = nfs_ok;
 923         unsigned long cnt;
 924         int nvecs;
 925
 926         /* no need to check permission - this will be done in nfsd_write() */
 927
 928         if (write->wr_offset >= OFFSET_MAX)
 929                 return nfserr_inval;
 930
 931         nfs4_lock_state();
 932         status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 933                                         cstate, stateid, WR_STATE, &filp);
 934         if (filp)
 935                 get_file(filp);
 936         nfs4_unlock_state();
 937
 938         if (status) {
 939                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 940                 return status;
 941         }
 942
 943         cnt = write->wr_buflen;
 944         write->wr_how_written = write->wr_stable_how;
 945         gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
 946
 947         nvecs = fill_in_write_vector(rqstp->rq_vec, write);
 948         WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
 949
 950         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 951                              write->wr_offset, rqstp->rq_vec, nvecs,
 952                              &cnt, &write->wr_how_written);
 953         if (filp)
 954                 fput(filp);
 955
 956         write->wr_bytes_written = cnt;
 957
 958         return status;
 959 }
 960
 961 /* This routine never returns NFS_OK!  If there are no other errors, it
 962  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 963  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 964  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 965  */
 966 static __be32
 967 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 968              struct nfsd4_verify *verify)
 969 {
 970         __be32 *buf, *p;
 971         int count;
 972         __be32 status;
 973
 974         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 975         if (status)
 976                 return status;
 977
 978         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 979         if (status)
 980                 return status;
 981
 982         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 983             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 984                 return nfserr_inval;
 985         if (verify->ve_attrlen & 3)
 986                 return nfserr_inval;
 987
 988         /* count in words:
 989          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 990          */
 991         count = 4 + (verify->ve_attrlen >> 2);
 992         buf = kmalloc(count << 2, GFP_KERNEL);
 993         if (!buf)
 994                 return nfserr_jukebox;
 995
 996         status = nfsd4_encode_fattr(&cstate->current_fh,
 997                                     cstate->current_fh.fh_export,
 998                                     cstate->current_fh.fh_dentry, buf,
 999                                     &count, verify->ve_bmval,
1000                                     rqstp, 0);
1001
1002         /* this means that nfsd4_encode_fattr() ran out of space */
1003         if (status == nfserr_resource && count == 0)
1004                 status = nfserr_not_same;
1005         if (status)
1006                 goto out_kfree;
1007
1008         /* skip bitmap */
1009         p = buf + 1 + ntohl(buf[0]);
1010         status = nfserr_not_same;
1011         if (ntohl(*p++) != verify->ve_attrlen)
1012                 goto out_kfree;
1013         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1014                 status = nfserr_same;
1015
1016 out_kfree:
1017         kfree(buf);
1018         return status;
1019 }
1020
1021 static __be32
1022 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1023               struct nfsd4_verify *verify)
1024 {
1025         __be32 status;
1026
1027         status = _nfsd4_verify(rqstp, cstate, verify);
1028         return status == nfserr_not_same ? nfs_ok : status;
1029 }
1030
1031 static __be32
1032 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1033              struct nfsd4_verify *verify)
1034 {
1035         __be32 status;
1036
1037         status = _nfsd4_verify(rqstp, cstate, verify);
1038         return status == nfserr_same ? nfs_ok : status;
1039 }
1040
1041 /*
1042  * NULL call.
1043  */
1044 static __be32
1045 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1046 {
1047         return nfs_ok;
1048 }
1049
1050 static inline void nfsd4_increment_op_stats(u32 opnum)
1051 {
1052         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1053                 nfsdstats.nfs4_opcount[opnum]++;
1054 }
1055
1056 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1057                               void *);
1058 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1059 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1060 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1061
1062 enum nfsd4_op_flags {
1063         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1064         ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1065         ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1066         /* For rfc 5661 section 2.6.3.1.1: */
1067         OP_HANDLES_WRONGSEC = 1 << 3,
1068         OP_IS_PUTFH_LIKE = 1 << 4,
1069         /*
1070          * These are the ops whose result size we estimate before
1071          * encoding, to avoid performing an op then not being able to
1072          * respond or cache a response.  This includes writes and setattrs
1073          * as well as the operations usually called "nonidempotent":
1074          */
1075         OP_MODIFIES_SOMETHING = 1 << 5,
1076         /*
1077          * Cache compounds containing these ops in the xid-based drc:
1078          * We use the DRC for compounds containing non-idempotent
1079          * operations, *except* those that are 4.1-specific (since
1080          * sessions provide their own EOS), and except for stateful
1081          * operations other than setclientid and setclientid_confirm
1082          * (since sequence numbers provide EOS for open, lock, etc in
1083          * the v4.0 case).
1084          */
1085         OP_CACHEME = 1 << 6,
1086         /*
1087          * These are ops which clear current state id.
1088          */
1089         OP_CLEAR_STATEID = 1 << 7,
1090 };
1091
1092 struct nfsd4_operation {
1093         nfsd4op_func op_func;
1094         u32 op_flags;
1095         char *op_name;
1096         /* Try to get response size before operation */
1097         nfsd4op_rsize op_rsize_bop;
1098         stateid_getter op_get_currentstateid;
1099         stateid_setter op_set_currentstateid;
1100 };
1101
1102 static struct nfsd4_operation nfsd4_ops[];
1103
1104 #ifdef NFSD_DEBUG
1105 static const char *nfsd4_op_name(unsigned opnum);
1106 #endif
1107
1108 /*
1109  * Enforce NFSv4.1 COMPOUND ordering rules:
1110  *
1111  * Also note, enforced elsewhere:
1112  *      - SEQUENCE other than as first op results in
1113  *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1114  *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1115  *        (Enforced in nfsd4_bind_conn_to_session().)
1116  *      - DESTROY_SESSION must be the final operation in a compound, if
1117  *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1118  *        (Enforced in nfsd4_destroy_session().)
1119  */
1120 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1121 {
1122         struct nfsd4_op *op = &args->ops[0];
1123
1124         /* These ordering requirements don't apply to NFSv4.0: */
1125         if (args->minorversion == 0)
1126                 return nfs_ok;
1127         /* This is weird, but OK, not our problem: */
1128         if (args->opcnt == 0)
1129                 return nfs_ok;
1130         if (op->status == nfserr_op_illegal)
1131                 return nfs_ok;
1132         if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1133                 return nfserr_op_not_in_session;
1134         if (op->opnum == OP_SEQUENCE)
1135                 return nfs_ok;
1136         if (args->opcnt != 1)
1137                 return nfserr_not_only_op;
1138         return nfs_ok;
1139 }
1140
1141 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1142 {
1143         return &nfsd4_ops[op->opnum];
1144 }
1145
1146 bool nfsd4_cache_this_op(struct nfsd4_op *op)
1147 {
1148         return OPDESC(op)->op_flags & OP_CACHEME;
1149 }
1150
1151 static bool need_wrongsec_check(struct svc_rqst *rqstp)
1152 {
1153         struct nfsd4_compoundres *resp = rqstp->rq_resp;
1154         struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1155         struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1156         struct nfsd4_op *next = &argp->ops[resp->opcnt];
1157         struct nfsd4_operation *thisd;
1158         struct nfsd4_operation *nextd;
1159
1160         thisd = OPDESC(this);
1161         /*
1162          * Most ops check wronsec on our own; only the putfh-like ops
1163          * have special rules.
1164          */
1165         if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1166                 return false;
1167         /*
1168          * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1169          * put-filehandle operation if we're not going to use the
1170          * result:
1171          */
1172         if (argp->opcnt == resp->opcnt)
1173                 return false;
1174
1175         nextd = OPDESC(next);
1176         /*
1177          * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1178          * errors themselves as necessary; others should check for them
1179          * now:
1180          */
1181         return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1182 }
1183
1184 /*
1185  * COMPOUND call.
1186  */
1187 static __be32
1188 nfsd4_proc_compound(struct svc_rqst *rqstp,
1189                     struct nfsd4_compoundargs *args,
1190                     struct nfsd4_compoundres *resp)
1191 {
1192         struct nfsd4_op *op;
1193         struct nfsd4_operation *opdesc;
1194         struct nfsd4_compound_state *cstate = &resp->cstate;
1195         int             slack_bytes;
1196         u32             plen = 0;
1197         __be32          status;
1198
1199         resp->xbuf = &rqstp->rq_res;
1200         resp->p = rqstp->rq_res.head[0].iov_base +
1201                                                 rqstp->rq_res.head[0].iov_len;
1202         resp->tagp = resp->p;
1203         /* reserve space for: taglen, tag, and opcnt */
1204         resp->p += 2 + XDR_QUADLEN(args->taglen);
1205         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1206         resp->taglen = args->taglen;
1207         resp->tag = args->tag;
1208         resp->opcnt = 0;
1209         resp->rqstp = rqstp;
1210         resp->cstate.minorversion = args->minorversion;
1211         resp->cstate.replay_owner = NULL;
1212         resp->cstate.session = NULL;
1213         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1214         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1215         /*
1216          * Don't use the deferral mechanism for NFSv4; compounds make it
1217          * too hard to avoid non-idempotency problems.
1218          */
1219         rqstp->rq_usedeferral = 0;
1220
1221         /*
1222          * According to RFC3010, this takes precedence over all other errors.
1223          */
1224         status = nfserr_minor_vers_mismatch;
1225         if (args->minorversion > nfsd_supported_minorversion)
1226                 goto out;
1227
1228         status = nfs41_check_op_ordering(args);
1229         if (status) {
1230                 op = &args->ops[0];
1231                 op->status = status;
1232                 goto encode_op;
1233         }
1234
1235         while (!status && resp->opcnt < args->opcnt) {
1236                 op = &args->ops[resp->opcnt++];
1237
1238                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1239                         resp->opcnt, args->opcnt, op->opnum,
1240                         nfsd4_op_name(op->opnum));
1241                 /*
1242                  * The XDR decode routines may have pre-set op->status;
1243                  * for example, if there is a miscellaneous XDR error
1244                  * it will be set to nfserr_bad_xdr.
1245                  */
1246                 if (op->status)
1247                         goto encode_op;
1248
1249                 /* We must be able to encode a successful response to
1250                  * this operation, with enough room left over to encode a
1251                  * failed response to the next operation.  If we don't
1252                  * have enough room, fail with ERR_RESOURCE.
1253                  */
1254                 slack_bytes = (char *)resp->end - (char *)resp->p;
1255                 if (slack_bytes < COMPOUND_SLACK_SPACE
1256                                 + COMPOUND_ERR_SLACK_SPACE) {
1257                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1258                         op->status = nfserr_resource;
1259                         goto encode_op;
1260                 }
1261
1262                 opdesc = OPDESC(op);
1263
1264                 if (!cstate->current_fh.fh_dentry) {
1265                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1266                                 op->status = nfserr_nofilehandle;
1267                                 goto encode_op;
1268                         }
1269                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1270                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1271                         op->status = nfserr_moved;
1272                         goto encode_op;
1273                 }
1274
1275                 /* If op is non-idempotent */
1276                 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1277                         plen = opdesc->op_rsize_bop(rqstp, op);
1278                         op->status = nfsd4_check_resp_size(resp, plen);
1279                 }
1280
1281                 if (op->status)
1282                         goto encode_op;
1283
1284                 if (opdesc->op_func) {
1285                         if (opdesc->op_get_currentstateid)
1286                                 opdesc->op_get_currentstateid(cstate, &op->u);
1287                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1288                 } else
1289                         BUG_ON(op->status == nfs_ok);
1290
1291                 if (!op->status) {
1292                         if (opdesc->op_set_currentstateid)
1293                                 opdesc->op_set_currentstateid(cstate, &op->u);
1294
1295                         if (opdesc->op_flags & OP_CLEAR_STATEID)
1296                                 clear_current_stateid(cstate);
1297
1298                         if (need_wrongsec_check(rqstp))
1299                                 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1300                 }
1301
1302 encode_op:
1303                 /* Only from SEQUENCE */
1304                 if (resp->cstate.status == nfserr_replay_cache) {
1305                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1306                         status = op->status;
1307                         goto out;
1308                 }
1309                 if (op->status == nfserr_replay_me) {
1310                         op->replay = &cstate->replay_owner->so_replay;
1311                         nfsd4_encode_replay(resp, op);
1312                         status = op->status = op->replay->rp_status;
1313                 } else {
1314                         nfsd4_encode_operation(resp, op);
1315                         status = op->status;
1316                 }
1317
1318                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1319                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1320                         be32_to_cpu(status));
1321
1322                 if (cstate->replay_owner) {
1323                         nfs4_unlock_state();
1324                         cstate->replay_owner = NULL;
1325                 }
1326                 /* XXX Ugh, we need to get rid of this kind of special case: */
1327                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1328                         fput(op->u.read.rd_filp);
1329
1330                 nfsd4_increment_op_stats(op->opnum);
1331         }
1332
1333         resp->cstate.status = status;
1334         fh_put(&resp->cstate.current_fh);
1335         fh_put(&resp->cstate.save_fh);
1336         BUG_ON(resp->cstate.replay_owner);
1337 out:
1338         /* Reset deferral mechanism for RPC deferrals */
1339         rqstp->rq_usedeferral = 1;
1340         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1341         return status;
1342 }
1343
1344 #define op_encode_hdr_size              (2)
1345 #define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1346 #define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1347 #define op_encode_change_info_maxsz     (5)
1348 #define nfs4_fattr_bitmap_maxsz         (4)
1349
1350 #define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1351 #define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1352
1353 #define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1354
1355 #define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1356 #define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1357                                          op_encode_ace_maxsz)
1358
1359 #define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1360
1361 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1362 {
1363         return (op_encode_hdr_size) * sizeof(__be32);
1364 }
1365
1366 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1367 {
1368         return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1369 }
1370
1371 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1372 {
1373         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1374 }
1375
1376 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1377 {
1378         return (op_encode_hdr_size + op_encode_change_info_maxsz
1379                 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1380 }
1381
1382 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1383 {
1384         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1385                 * sizeof(__be32);
1386 }
1387
1388 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1389 {
1390         return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1391                 * sizeof(__be32);
1392 }
1393
1394 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1395 {
1396         return (op_encode_hdr_size + op_encode_stateid_maxsz
1397                 + op_encode_change_info_maxsz + 1
1398                 + nfs4_fattr_bitmap_maxsz
1399                 + op_encode_delegation_maxsz) * sizeof(__be32);
1400 }
1401
1402 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1403 {
1404         u32 maxcount = 0, rlen = 0;
1405
1406         maxcount = svc_max_payload(rqstp);
1407         rlen = op->u.read.rd_length;
1408
1409         if (rlen > maxcount)
1410                 rlen = maxcount;
1411
1412         return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1413 }
1414
1415 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1416 {
1417         u32 rlen = op->u.readdir.rd_maxcount;
1418
1419         if (rlen > PAGE_SIZE)
1420                 rlen = PAGE_SIZE;
1421
1422         return (op_encode_hdr_size + op_encode_verifier_maxsz)
1423                  * sizeof(__be32) + rlen;
1424 }
1425
1426 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1427 {
1428         return (op_encode_hdr_size + op_encode_change_info_maxsz)
1429                 * sizeof(__be32);
1430 }
1431
1432 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1433 {
1434         return (op_encode_hdr_size + op_encode_change_info_maxsz
1435                 + op_encode_change_info_maxsz) * sizeof(__be32);
1436 }
1437
1438 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1439 {
1440         return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1441 }
1442
1443 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1444 {
1445         return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1446 }
1447
1448 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1449 {
1450         return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1451 }
1452
1453 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1454 {
1455         return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1456                 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1457                 2 + /*eir_server_owner.so_minor_id */\
1458                 /* eir_server_owner.so_major_id<> */\
1459                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1460                 /* eir_server_scope<> */\
1461                 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1462                 1 + /* eir_server_impl_id array length */\
1463                 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1464 }
1465
1466 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1467 {
1468         return (op_encode_hdr_size + \
1469                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1470                 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1471 }
1472
1473 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1474 {
1475         return (op_encode_hdr_size + \
1476                 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1477                 2 + /* csr_sequence, csr_flags */\
1478                 op_encode_channel_attrs_maxsz + \
1479                 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1480 }
1481
1482 static struct nfsd4_operation nfsd4_ops[] = {
1483         [OP_ACCESS] = {
1484                 .op_func = (nfsd4op_func)nfsd4_access,
1485                 .op_name = "OP_ACCESS",
1486         },
1487         [OP_CLOSE] = {
1488                 .op_func = (nfsd4op_func)nfsd4_close,
1489                 .op_flags = OP_MODIFIES_SOMETHING,
1490                 .op_name = "OP_CLOSE",
1491                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1492                 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1493                 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1494         },
1495         [OP_COMMIT] = {
1496                 .op_func = (nfsd4op_func)nfsd4_commit,
1497                 .op_flags = OP_MODIFIES_SOMETHING,
1498                 .op_name = "OP_COMMIT",
1499                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1500         },
1501         [OP_CREATE] = {
1502                 .op_func = (nfsd4op_func)nfsd4_create,
1503                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1504                 .op_name = "OP_CREATE",
1505                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1506         },
1507         [OP_DELEGRETURN] = {
1508                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1509                 .op_flags = OP_MODIFIES_SOMETHING,
1510                 .op_name = "OP_DELEGRETURN",
1511                 .op_rsize_bop = nfsd4_only_status_rsize,
1512                 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1513         },
1514         [OP_GETATTR] = {
1515                 .op_func = (nfsd4op_func)nfsd4_getattr,
1516                 .op_flags = ALLOWED_ON_ABSENT_FS,
1517                 .op_name = "OP_GETATTR",
1518         },
1519         [OP_GETFH] = {
1520                 .op_func = (nfsd4op_func)nfsd4_getfh,
1521                 .op_name = "OP_GETFH",
1522         },
1523         [OP_LINK] = {
1524                 .op_func = (nfsd4op_func)nfsd4_link,
1525                 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1526                                 | OP_CACHEME,
1527                 .op_name = "OP_LINK",
1528                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1529         },
1530         [OP_LOCK] = {
1531                 .op_func = (nfsd4op_func)nfsd4_lock,
1532                 .op_flags = OP_MODIFIES_SOMETHING,
1533                 .op_name = "OP_LOCK",
1534                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1535                 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1536         },
1537         [OP_LOCKT] = {
1538                 .op_func = (nfsd4op_func)nfsd4_lockt,
1539                 .op_name = "OP_LOCKT",
1540         },
1541         [OP_LOCKU] = {
1542                 .op_func = (nfsd4op_func)nfsd4_locku,
1543                 .op_flags = OP_MODIFIES_SOMETHING,
1544                 .op_name = "OP_LOCKU",
1545                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1546                 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1547         },
1548         [OP_LOOKUP] = {
1549                 .op_func = (nfsd4op_func)nfsd4_lookup,
1550                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1551                 .op_name = "OP_LOOKUP",
1552         },
1553         [OP_LOOKUPP] = {
1554                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1555                 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1556                 .op_name = "OP_LOOKUPP",
1557         },
1558         [OP_NVERIFY] = {
1559                 .op_func = (nfsd4op_func)nfsd4_nverify,
1560                 .op_name = "OP_NVERIFY",
1561         },
1562         [OP_OPEN] = {
1563                 .op_func = (nfsd4op_func)nfsd4_open,
1564                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1565                 .op_name = "OP_OPEN",
1566                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1567                 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1568         },
1569         [OP_OPEN_CONFIRM] = {
1570                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1571                 .op_flags = OP_MODIFIES_SOMETHING,
1572                 .op_name = "OP_OPEN_CONFIRM",
1573                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1574         },
1575         [OP_OPEN_DOWNGRADE] = {
1576                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1577                 .op_flags = OP_MODIFIES_SOMETHING,
1578                 .op_name = "OP_OPEN_DOWNGRADE",
1579                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1580                 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1581                 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1582         },
1583         [OP_PUTFH] = {
1584                 .op_func = (nfsd4op_func)nfsd4_putfh,
1585                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1586                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1587                                 | OP_CLEAR_STATEID,
1588                 .op_name = "OP_PUTFH",
1589                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1590         },
1591         [OP_PUTPUBFH] = {
1592                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1593                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1594                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1595                                 | OP_CLEAR_STATEID,
1596                 .op_name = "OP_PUTPUBFH",
1597                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1598         },
1599         [OP_PUTROOTFH] = {
1600                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1601                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1602                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1603                                 | OP_CLEAR_STATEID,
1604                 .op_name = "OP_PUTROOTFH",
1605                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1606         },
1607         [OP_READ] = {
1608                 .op_func = (nfsd4op_func)nfsd4_read,
1609                 .op_flags = OP_MODIFIES_SOMETHING,
1610                 .op_name = "OP_READ",
1611                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1612                 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1613         },
1614         [OP_READDIR] = {
1615                 .op_func = (nfsd4op_func)nfsd4_readdir,
1616                 .op_flags = OP_MODIFIES_SOMETHING,
1617                 .op_name = "OP_READDIR",
1618                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1619         },
1620         [OP_READLINK] = {
1621                 .op_func = (nfsd4op_func)nfsd4_readlink,
1622                 .op_name = "OP_READLINK",
1623         },
1624         [OP_REMOVE] = {
1625                 .op_func = (nfsd4op_func)nfsd4_remove,
1626                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1627                 .op_name = "OP_REMOVE",
1628                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1629         },
1630         [OP_RENAME] = {
1631                 .op_func = (nfsd4op_func)nfsd4_rename,
1632                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1633                 .op_name = "OP_RENAME",
1634                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1635         },
1636         [OP_RENEW] = {
1637                 .op_func = (nfsd4op_func)nfsd4_renew,
1638                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1639                                 | OP_MODIFIES_SOMETHING,
1640                 .op_name = "OP_RENEW",
1641                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1642
1643         },
1644         [OP_RESTOREFH] = {
1645                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1646                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1647                                 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1648                 .op_name = "OP_RESTOREFH",
1649                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1650         },
1651         [OP_SAVEFH] = {
1652                 .op_func = (nfsd4op_func)nfsd4_savefh,
1653                 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1654                 .op_name = "OP_SAVEFH",
1655                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1656         },
1657         [OP_SECINFO] = {
1658                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1659                 .op_flags = OP_HANDLES_WRONGSEC,
1660                 .op_name = "OP_SECINFO",
1661         },
1662         [OP_SETATTR] = {
1663                 .op_func = (nfsd4op_func)nfsd4_setattr,
1664                 .op_name = "OP_SETATTR",
1665                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1666                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1667                 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1668         },
1669         [OP_SETCLIENTID] = {
1670                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1671                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1672                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1673                 .op_name = "OP_SETCLIENTID",
1674                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1675         },
1676         [OP_SETCLIENTID_CONFIRM] = {
1677                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1678                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1679                                 | OP_MODIFIES_SOMETHING | OP_CACHEME,
1680                 .op_name = "OP_SETCLIENTID_CONFIRM",
1681                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1682         },
1683         [OP_VERIFY] = {
1684                 .op_func = (nfsd4op_func)nfsd4_verify,
1685                 .op_name = "OP_VERIFY",
1686         },
1687         [OP_WRITE] = {
1688                 .op_func = (nfsd4op_func)nfsd4_write,
1689                 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1690                 .op_name = "OP_WRITE",
1691                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1692                 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1693         },
1694         [OP_RELEASE_LOCKOWNER] = {
1695                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1696                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1697                                 | OP_MODIFIES_SOMETHING,
1698                 .op_name = "OP_RELEASE_LOCKOWNER",
1699                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1700         },
1701
1702         /* NFSv4.1 operations */
1703         [OP_EXCHANGE_ID] = {
1704                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1705                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1706                                 | OP_MODIFIES_SOMETHING,
1707                 .op_name = "OP_EXCHANGE_ID",
1708                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1709         },
1710         [OP_BACKCHANNEL_CTL] = {
1711                 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
1712                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1713                 .op_name = "OP_BACKCHANNEL_CTL",
1714                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1715         },
1716         [OP_BIND_CONN_TO_SESSION] = {
1717                 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1718                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1719                                 | OP_MODIFIES_SOMETHING,
1720                 .op_name = "OP_BIND_CONN_TO_SESSION",
1721                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1722         },
1723         [OP_CREATE_SESSION] = {
1724                 .op_func = (nfsd4op_func)nfsd4_create_session,
1725                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1726                                 | OP_MODIFIES_SOMETHING,
1727                 .op_name = "OP_CREATE_SESSION",
1728                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1729         },
1730         [OP_DESTROY_SESSION] = {
1731                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1732                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1733                                 | OP_MODIFIES_SOMETHING,
1734                 .op_name = "OP_DESTROY_SESSION",
1735                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1736         },
1737         [OP_SEQUENCE] = {
1738                 .op_func = (nfsd4op_func)nfsd4_sequence,
1739                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1740                 .op_name = "OP_SEQUENCE",
1741         },
1742         [OP_DESTROY_CLIENTID] = {
1743                 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1744                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1745                                 | OP_MODIFIES_SOMETHING,
1746                 .op_name = "OP_DESTROY_CLIENTID",
1747                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1748         },
1749         [OP_RECLAIM_COMPLETE] = {
1750                 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1751                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1752                 .op_name = "OP_RECLAIM_COMPLETE",
1753                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1754         },
1755         [OP_SECINFO_NO_NAME] = {
1756                 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1757                 .op_flags = OP_HANDLES_WRONGSEC,
1758                 .op_name = "OP_SECINFO_NO_NAME",
1759         },
1760         [OP_TEST_STATEID] = {
1761                 .op_func = (nfsd4op_func)nfsd4_test_stateid,
1762                 .op_flags = ALLOWED_WITHOUT_FH,
1763                 .op_name = "OP_TEST_STATEID",
1764         },
1765         [OP_FREE_STATEID] = {
1766                 .op_func = (nfsd4op_func)nfsd4_free_stateid,
1767                 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1768                 .op_name = "OP_FREE_STATEID",
1769                 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
1770                 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1771         },
1772 };
1773
1774 #ifdef NFSD_DEBUG
1775 static const char *nfsd4_op_name(unsigned opnum)
1776 {
1777         if (opnum < ARRAY_SIZE(nfsd4_ops))
1778                 return nfsd4_ops[opnum].op_name;
1779         return "unknown_operation";
1780 }
1781 #endif
1782
1783 #define nfsd4_voidres                   nfsd4_voidargs
1784 struct nfsd4_voidargs { int dummy; };
1785
1786 static struct svc_procedure             nfsd_procedures4[2] = {
1787         [NFSPROC4_NULL] = {
1788                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1789                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1790                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1791                 .pc_ressize = sizeof(struct nfsd4_voidres),
1792                 .pc_cachetype = RC_NOCACHE,
1793                 .pc_xdrressize = 1,
1794         },
1795         [NFSPROC4_COMPOUND] = {
1796                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1797                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1798                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1799                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1800                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1801                 .pc_release = nfsd4_release_compoundargs,
1802                 .pc_cachetype = RC_NOCACHE,
1803                 .pc_xdrressize = NFSD_BUFSIZE/4,
1804         },
1805 };
1806
1807 struct svc_version      nfsd_version4 = {
1808                 .vs_vers        = 4,
1809                 .vs_nproc       = 2,
1810                 .vs_proc        = nfsd_procedures4,
1811                 .vs_dispatch    = nfsd_dispatch,
1812                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1813 };
1814
1815 /*
1816  * Local variables:
1817  *  c-basic-offset: 8
1818  * End:
1819  */