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   1 /*
   2  *  fs/nfsd/nfs4proc.c
   3  *
   4  *  Server-side procedures for NFSv4.
   5  *
   6  *  Copyright (c) 2002 The Regents of the University of Michigan.
   7  *  All rights reserved.
   8  *
   9  *  Kendrick Smith <kmsmith@umich.edu>
  10  *  Andy Adamson   <andros@umich.edu>
  11  *
  12  *  Redistribution and use in source and binary forms, with or without
  13  *  modification, are permitted provided that the following conditions
  14  *  are met:
  15  *
  16  *  1. Redistributions of source code must retain the above copyright
  17  *     notice, this list of conditions and the following disclaimer.
  18  *  2. Redistributions in binary form must reproduce the above copyright
  19  *     notice, this list of conditions and the following disclaimer in the
  20  *     documentation and/or other materials provided with the distribution.
  21  *  3. Neither the name of the University nor the names of its
  22  *     contributors may be used to endorse or promote products derived
  23  *     from this software without specific prior written permission.
  24  *
  25  *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  26  *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  27  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  28  *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  32  *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  34  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #include <linux/param.h>
  39 #include <linux/major.h>
  40 #include <linux/slab.h>
  41 #include <linux/file.h>
  42
  43 #include <linux/sunrpc/svc.h>
  44 #include <linux/nfsd/nfsd.h>
  45 #include <linux/nfsd/cache.h>
  46 #include <linux/nfs4.h>
  47 #include <linux/nfsd/state.h>
  48 #include <linux/nfsd/xdr4.h>
  49 #include <linux/nfs4_acl.h>
  50 #include <linux/sunrpc/gss_api.h>
  51 #include "vfs.h"
  52
  53 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  54
  55 static u32 nfsd_attrmask[] = {
  56         NFSD_WRITEABLE_ATTRS_WORD0,
  57         NFSD_WRITEABLE_ATTRS_WORD1,
  58         NFSD_WRITEABLE_ATTRS_WORD2
  59 };
  60
  61 static u32 nfsd41_ex_attrmask[] = {
  62         NFSD_SUPPATTR_EXCLCREAT_WORD0,
  63         NFSD_SUPPATTR_EXCLCREAT_WORD1,
  64         NFSD_SUPPATTR_EXCLCREAT_WORD2
  65 };
  66
  67 static __be32
  68 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  69                    u32 *bmval, u32 *writable)
  70 {
  71         struct dentry *dentry = cstate->current_fh.fh_dentry;
  72
  73         /*
  74          * Check about attributes are supported by the NFSv4 server or not.
  75          * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  76          */
  77         if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  78             (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  79             (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  80                 return nfserr_attrnotsupp;
  81
  82         /*
  83          * Check FATTR4_WORD0_ACL can be supported
  84          * in current environment or not.
  85          */
  86         if (bmval[0] & FATTR4_WORD0_ACL) {
  87                 if (!IS_POSIXACL(dentry->d_inode))
  88                         return nfserr_attrnotsupp;
  89         }
  90
  91         /*
  92          * According to spec, read-only attributes return ERR_INVAL.
  93          */
  94         if (writable) {
  95                 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  96                     (bmval[2] & ~writable[2]))
  97                         return nfserr_inval;
  98         }
  99
 100         return nfs_ok;
 101 }
 102
 103 static __be32
 104 nfsd4_check_open_attributes(struct svc_rqst *rqstp,
 105         struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
 106 {
 107         __be32 status = nfs_ok;
 108
 109         if (open->op_create == NFS4_OPEN_CREATE) {
 110                 if (open->op_createmode == NFS4_CREATE_UNCHECKED
 111                     || open->op_createmode == NFS4_CREATE_GUARDED)
 112                         status = check_attr_support(rqstp, cstate,
 113                                         open->op_bmval, nfsd_attrmask);
 114                 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 115                         status = check_attr_support(rqstp, cstate,
 116                                         open->op_bmval, nfsd41_ex_attrmask);
 117         }
 118
 119         return status;
 120 }
 121
 122 static int
 123 is_create_with_attrs(struct nfsd4_open *open)
 124 {
 125         return open->op_create == NFS4_OPEN_CREATE
 126                 && (open->op_createmode == NFS4_CREATE_UNCHECKED
 127                     || open->op_createmode == NFS4_CREATE_GUARDED
 128                     || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 129 }
 130
 131 /*
 132  * if error occurs when setting the acl, just clear the acl bit
 133  * in the returned attr bitmap.
 134  */
 135 static void
 136 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 137                 struct nfs4_acl *acl, u32 *bmval)
 138 {
 139         __be32 status;
 140
 141         status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 142         if (status)
 143                 /*
 144                  * We should probably fail the whole open at this point,
 145                  * but we've already created the file, so it's too late;
 146                  * So this seems the least of evils:
 147                  */
 148                 bmval[0] &= ~FATTR4_WORD0_ACL;
 149 }
 150
 151 static inline void
 152 fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 153 {
 154         fh_put(dst);
 155         dget(src->fh_dentry);
 156         if (src->fh_export)
 157                 cache_get(&src->fh_export->h);
 158         *dst = *src;
 159 }
 160
 161 static __be32
 162 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 163 {
 164         __be32 status;
 165
 166         if (open->op_truncate &&
 167                 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 168                 return nfserr_inval;
 169
 170         if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 171                 accmode |= NFSD_MAY_READ;
 172         if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 173                 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 174         if (open->op_share_deny & NFS4_SHARE_DENY_WRITE)
 175                 accmode |= NFSD_MAY_WRITE;
 176
 177         status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 178
 179         return status;
 180 }
 181
 182 static __be32
 183 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 184 {
 185         struct svc_fh resfh;
 186         __be32 status;
 187         int created = 0;
 188
 189         fh_init(&resfh, NFS4_FHSIZE);
 190         open->op_truncate = 0;
 191
 192         if (open->op_create) {
 193                 /* FIXME: check session persistence and pnfs flags.
 194                  * The nfsv4.1 spec requires the following semantics:
 195                  *
 196                  * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 197                  * Reply Cache  | server |                 |
 198                  * -------------+--------+-----------------+--------------------
 199                  * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 200                  *              |        |                 | (SHOULD)
 201                  *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 202                  *              |        |                 | (SHOULD NOT)
 203                  * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 204                  * yes          | no     | GUARDED4        | GUARDED4
 205                  * yes          | yes    | GUARDED4        | GUARDED4
 206                  */
 207
 208                 /*
 209                  * Note: create modes (UNCHECKED,GUARDED...) are the same
 210                  * in NFSv4 as in v3.
 211                  */
 212                 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
 213                                         open->op_fname.len, &open->op_iattr,
 214                                         &resfh, open->op_createmode,
 215                                         (u32 *)open->op_verf.data,
 216                                         &open->op_truncate, &created);
 217
 218                 /*
 219                  * Following rfc 3530 14.2.16, use the returned bitmask
 220                  * to indicate which attributes we used to store the
 221                  * verifier:
 222                  */
 223                 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 224                         open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 225                                                 FATTR4_WORD1_TIME_MODIFY);
 226         } else {
 227                 status = nfsd_lookup(rqstp, current_fh,
 228                                      open->op_fname.data, open->op_fname.len, &resfh);
 229                 fh_unlock(current_fh);
 230         }
 231         if (status)
 232                 goto out;
 233
 234         if (is_create_with_attrs(open) && open->op_acl != NULL)
 235                 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval);
 236
 237         set_change_info(&open->op_cinfo, current_fh);
 238         fh_dup2(current_fh, &resfh);
 239
 240         /* set reply cache */
 241         fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
 242                         &resfh.fh_handle);
 243         if (!created)
 244                 status = do_open_permission(rqstp, current_fh, open,
 245                                             NFSD_MAY_NOP);
 246
 247 out:
 248         fh_put(&resfh);
 249         return status;
 250 }
 251
 252 static __be32
 253 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 254 {
 255         __be32 status;
 256
 257         /* Only reclaims from previously confirmed clients are valid */
 258         if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
 259                 return status;
 260
 261         /* We don't know the target directory, and therefore can not
 262         * set the change info
 263         */
 264
 265         memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 266
 267         /* set replay cache */
 268         fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh,
 269                         &current_fh->fh_handle);
 270
 271         open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 272                 (open->op_iattr.ia_size == 0);
 273
 274         status = do_open_permission(rqstp, current_fh, open,
 275                                     NFSD_MAY_OWNER_OVERRIDE);
 276
 277         return status;
 278 }
 279
 280 static void
 281 copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 282 {
 283         struct nfsd4_sessionid *sid =
 284                         (struct nfsd4_sessionid *)session->se_sessionid.data;
 285
 286         clid->cl_boot = sid->clientid.cl_boot;
 287         clid->cl_id = sid->clientid.cl_id;
 288 }
 289
 290 static __be32
 291 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 292            struct nfsd4_open *open)
 293 {
 294         __be32 status;
 295         struct nfsd4_compoundres *resp;
 296
 297         dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
 298                 (int)open->op_fname.len, open->op_fname.data,
 299                 open->op_stateowner);
 300
 301         /* This check required by spec. */
 302         if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 303                 return nfserr_inval;
 304
 305         if (nfsd4_has_session(cstate))
 306                 copy_clientid(&open->op_clientid, cstate->session);
 307
 308         nfs4_lock_state();
 309
 310         /* check seqid for replay. set nfs4_owner */
 311         resp = rqstp->rq_resp;
 312         status = nfsd4_process_open1(&resp->cstate, open);
 313         if (status == nfserr_replay_me) {
 314                 struct nfs4_replay *rp = &open->op_stateowner->so_replay;
 315                 fh_put(&cstate->current_fh);
 316                 fh_copy_shallow(&cstate->current_fh.fh_handle,
 317                                 &rp->rp_openfh);
 318                 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 319                 if (status)
 320                         dprintk("nfsd4_open: replay failed"
 321                                 " restoring previous filehandle\n");
 322                 else
 323                         status = nfserr_replay_me;
 324         }
 325         if (status)
 326                 goto out;
 327
 328         status = nfsd4_check_open_attributes(rqstp, cstate, open);
 329         if (status)
 330                 goto out;
 331
 332         /* Openowner is now set, so sequence id will get bumped.  Now we need
 333          * these checks before we do any creates: */
 334         status = nfserr_grace;
 335         if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 336                 goto out;
 337         status = nfserr_no_grace;
 338         if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 339                 goto out;
 340
 341         switch (open->op_claim_type) {
 342                 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 343                 case NFS4_OPEN_CLAIM_NULL:
 344                         /*
 345                          * (1) set CURRENT_FH to the file being opened,
 346                          * creating it if necessary, (2) set open->op_cinfo,
 347                          * (3) set open->op_truncate if the file is to be
 348                          * truncated after opening, (4) do permission checking.
 349                          */
 350                         status = do_open_lookup(rqstp, &cstate->current_fh,
 351                                                 open);
 352                         if (status)
 353                                 goto out;
 354                         break;
 355                 case NFS4_OPEN_CLAIM_PREVIOUS:
 356                         open->op_stateowner->so_confirmed = 1;
 357                         /*
 358                          * The CURRENT_FH is already set to the file being
 359                          * opened.  (1) set open->op_cinfo, (2) set
 360                          * open->op_truncate if the file is to be truncated
 361                          * after opening, (3) do permission checking.
 362                         */
 363                         status = do_open_fhandle(rqstp, &cstate->current_fh,
 364                                                  open);
 365                         if (status)
 366                                 goto out;
 367                         break;
 368                 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 369                         open->op_stateowner->so_confirmed = 1;
 370                         dprintk("NFSD: unsupported OPEN claim type %d\n",
 371                                 open->op_claim_type);
 372                         status = nfserr_notsupp;
 373                         goto out;
 374                 default:
 375                         dprintk("NFSD: Invalid OPEN claim type %d\n",
 376                                 open->op_claim_type);
 377                         status = nfserr_inval;
 378                         goto out;
 379         }
 380         /*
 381          * nfsd4_process_open2() does the actual opening of the file.  If
 382          * successful, it (1) truncates the file if open->op_truncate was
 383          * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 384          */
 385         status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 386 out:
 387         if (open->op_stateowner) {
 388                 nfs4_get_stateowner(open->op_stateowner);
 389                 cstate->replay_owner = open->op_stateowner;
 390         }
 391         nfs4_unlock_state();
 392         return status;
 393 }
 394
 395 /*
 396  * filehandle-manipulating ops.
 397  */
 398 static __be32
 399 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 400             struct svc_fh **getfh)
 401 {
 402         if (!cstate->current_fh.fh_dentry)
 403                 return nfserr_nofilehandle;
 404
 405         *getfh = &cstate->current_fh;
 406         return nfs_ok;
 407 }
 408
 409 static __be32
 410 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 411             struct nfsd4_putfh *putfh)
 412 {
 413         fh_put(&cstate->current_fh);
 414         cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 415         memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 416                putfh->pf_fhlen);
 417         return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 418 }
 419
 420 static __be32
 421 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 422                 void *arg)
 423 {
 424         __be32 status;
 425
 426         fh_put(&cstate->current_fh);
 427         status = exp_pseudoroot(rqstp, &cstate->current_fh);
 428         return status;
 429 }
 430
 431 static __be32
 432 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 433                 void *arg)
 434 {
 435         if (!cstate->save_fh.fh_dentry)
 436                 return nfserr_restorefh;
 437
 438         fh_dup2(&cstate->current_fh, &cstate->save_fh);
 439         return nfs_ok;
 440 }
 441
 442 static __be32
 443 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 444              void *arg)
 445 {
 446         if (!cstate->current_fh.fh_dentry)
 447                 return nfserr_nofilehandle;
 448
 449         fh_dup2(&cstate->save_fh, &cstate->current_fh);
 450         return nfs_ok;
 451 }
 452
 453 /*
 454  * misc nfsv4 ops
 455  */
 456 static __be32
 457 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 458              struct nfsd4_access *access)
 459 {
 460         if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 461                 return nfserr_inval;
 462
 463         access->ac_resp_access = access->ac_req_access;
 464         return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 465                            &access->ac_supported);
 466 }
 467
 468 static __be32
 469 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 470              struct nfsd4_commit *commit)
 471 {
 472         __be32 status;
 473
 474         u32 *p = (u32 *)commit->co_verf.data;
 475         *p++ = nfssvc_boot.tv_sec;
 476         *p++ = nfssvc_boot.tv_usec;
 477
 478         status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 479                              commit->co_count);
 480         if (status == nfserr_symlink)
 481                 status = nfserr_inval;
 482         return status;
 483 }
 484
 485 static __be32
 486 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 487              struct nfsd4_create *create)
 488 {
 489         struct svc_fh resfh;
 490         __be32 status;
 491         dev_t rdev;
 492
 493         fh_init(&resfh, NFS4_FHSIZE);
 494
 495         status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 496                            NFSD_MAY_CREATE);
 497         if (status == nfserr_symlink)
 498                 status = nfserr_notdir;
 499         if (status)
 500                 return status;
 501
 502         status = check_attr_support(rqstp, cstate, create->cr_bmval,
 503                                     nfsd_attrmask);
 504         if (status)
 505                 return status;
 506
 507         switch (create->cr_type) {
 508         case NF4LNK:
 509                 /* ugh! we have to null-terminate the linktext, or
 510                  * vfs_symlink() will choke.  it is always safe to
 511                  * null-terminate by brute force, since at worst we
 512                  * will overwrite the first byte of the create namelen
 513                  * in the XDR buffer, which has already been extracted
 514                  * during XDR decode.
 515                  */
 516                 create->cr_linkname[create->cr_linklen] = 0;
 517
 518                 status = nfsd_symlink(rqstp, &cstate->current_fh,
 519                                       create->cr_name, create->cr_namelen,
 520                                       create->cr_linkname, create->cr_linklen,
 521                                       &resfh, &create->cr_iattr);
 522                 break;
 523
 524         case NF4BLK:
 525                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 526                 if (MAJOR(rdev) != create->cr_specdata1 ||
 527                     MINOR(rdev) != create->cr_specdata2)
 528                         return nfserr_inval;
 529                 status = nfsd_create(rqstp, &cstate->current_fh,
 530                                      create->cr_name, create->cr_namelen,
 531                                      &create->cr_iattr, S_IFBLK, rdev, &resfh);
 532                 break;
 533
 534         case NF4CHR:
 535                 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 536                 if (MAJOR(rdev) != create->cr_specdata1 ||
 537                     MINOR(rdev) != create->cr_specdata2)
 538                         return nfserr_inval;
 539                 status = nfsd_create(rqstp, &cstate->current_fh,
 540                                      create->cr_name, create->cr_namelen,
 541                                      &create->cr_iattr,S_IFCHR, rdev, &resfh);
 542                 break;
 543
 544         case NF4SOCK:
 545                 status = nfsd_create(rqstp, &cstate->current_fh,
 546                                      create->cr_name, create->cr_namelen,
 547                                      &create->cr_iattr, S_IFSOCK, 0, &resfh);
 548                 break;
 549
 550         case NF4FIFO:
 551                 status = nfsd_create(rqstp, &cstate->current_fh,
 552                                      create->cr_name, create->cr_namelen,
 553                                      &create->cr_iattr, S_IFIFO, 0, &resfh);
 554                 break;
 555
 556         case NF4DIR:
 557                 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 558                 status = nfsd_create(rqstp, &cstate->current_fh,
 559                                      create->cr_name, create->cr_namelen,
 560                                      &create->cr_iattr, S_IFDIR, 0, &resfh);
 561                 break;
 562
 563         default:
 564                 status = nfserr_badtype;
 565         }
 566
 567         if (status)
 568                 goto out;
 569
 570         if (create->cr_acl != NULL)
 571                 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 572                                 create->cr_bmval);
 573
 574         fh_unlock(&cstate->current_fh);
 575         set_change_info(&create->cr_cinfo, &cstate->current_fh);
 576         fh_dup2(&cstate->current_fh, &resfh);
 577 out:
 578         fh_put(&resfh);
 579         return status;
 580 }
 581
 582 static __be32
 583 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 584               struct nfsd4_getattr *getattr)
 585 {
 586         __be32 status;
 587
 588         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 589         if (status)
 590                 return status;
 591
 592         if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 593                 return nfserr_inval;
 594
 595         getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 596         getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 597         getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 598
 599         getattr->ga_fhp = &cstate->current_fh;
 600         return nfs_ok;
 601 }
 602
 603 static __be32
 604 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 605            struct nfsd4_link *link)
 606 {
 607         __be32 status = nfserr_nofilehandle;
 608
 609         if (!cstate->save_fh.fh_dentry)
 610                 return status;
 611         status = nfsd_link(rqstp, &cstate->current_fh,
 612                            link->li_name, link->li_namelen, &cstate->save_fh);
 613         if (!status)
 614                 set_change_info(&link->li_cinfo, &cstate->current_fh);
 615         return status;
 616 }
 617
 618 static __be32
 619 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 620               void *arg)
 621 {
 622         struct svc_fh tmp_fh;
 623         __be32 ret;
 624
 625         fh_init(&tmp_fh, NFS4_FHSIZE);
 626         ret = exp_pseudoroot(rqstp, &tmp_fh);
 627         if (ret)
 628                 return ret;
 629         if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) {
 630                 fh_put(&tmp_fh);
 631                 return nfserr_noent;
 632         }
 633         fh_put(&tmp_fh);
 634         return nfsd_lookup(rqstp, &cstate->current_fh,
 635                            "..", 2, &cstate->current_fh);
 636 }
 637
 638 static __be32
 639 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 640              struct nfsd4_lookup *lookup)
 641 {
 642         return nfsd_lookup(rqstp, &cstate->current_fh,
 643                            lookup->lo_name, lookup->lo_len,
 644                            &cstate->current_fh);
 645 }
 646
 647 static __be32
 648 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 649            struct nfsd4_read *read)
 650 {
 651         __be32 status;
 652
 653         /* no need to check permission - this will be done in nfsd_read() */
 654
 655         read->rd_filp = NULL;
 656         if (read->rd_offset >= OFFSET_MAX)
 657                 return nfserr_inval;
 658
 659         nfs4_lock_state();
 660         /* check stateid */
 661         if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid,
 662                                                  RD_STATE, &read->rd_filp))) {
 663                 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 664                 goto out;
 665         }
 666         if (read->rd_filp)
 667                 get_file(read->rd_filp);
 668         status = nfs_ok;
 669 out:
 670         nfs4_unlock_state();
 671         read->rd_rqstp = rqstp;
 672         read->rd_fhp = &cstate->current_fh;
 673         return status;
 674 }
 675
 676 static __be32
 677 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 678               struct nfsd4_readdir *readdir)
 679 {
 680         u64 cookie = readdir->rd_cookie;
 681         static const nfs4_verifier zeroverf;
 682
 683         /* no need to check permission - this will be done in nfsd_readdir() */
 684
 685         if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 686                 return nfserr_inval;
 687
 688         readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 689         readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 690         readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 691
 692         if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
 693             (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 694                 return nfserr_bad_cookie;
 695
 696         readdir->rd_rqstp = rqstp;
 697         readdir->rd_fhp = &cstate->current_fh;
 698         return nfs_ok;
 699 }
 700
 701 static __be32
 702 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 703                struct nfsd4_readlink *readlink)
 704 {
 705         readlink->rl_rqstp = rqstp;
 706         readlink->rl_fhp = &cstate->current_fh;
 707         return nfs_ok;
 708 }
 709
 710 static __be32
 711 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 712              struct nfsd4_remove *remove)
 713 {
 714         __be32 status;
 715
 716         if (locks_in_grace())
 717                 return nfserr_grace;
 718         status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 719                              remove->rm_name, remove->rm_namelen);
 720         if (status == nfserr_symlink)
 721                 return nfserr_notdir;
 722         if (!status) {
 723                 fh_unlock(&cstate->current_fh);
 724                 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 725         }
 726         return status;
 727 }
 728
 729 static __be32
 730 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 731              struct nfsd4_rename *rename)
 732 {
 733         __be32 status = nfserr_nofilehandle;
 734
 735         if (!cstate->save_fh.fh_dentry)
 736                 return status;
 737         if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags
 738                                         & NFSEXP_NOSUBTREECHECK))
 739                 return nfserr_grace;
 740         status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 741                              rename->rn_snamelen, &cstate->current_fh,
 742                              rename->rn_tname, rename->rn_tnamelen);
 743
 744         /* the underlying filesystem returns different error's than required
 745          * by NFSv4. both save_fh and current_fh have been verified.. */
 746         if (status == nfserr_isdir)
 747                 status = nfserr_exist;
 748         else if ((status == nfserr_notdir) &&
 749                   (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 750                    S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 751                 status = nfserr_exist;
 752         else if (status == nfserr_symlink)
 753                 status = nfserr_notdir;
 754
 755         if (!status) {
 756                 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 757                 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 758         }
 759         return status;
 760 }
 761
 762 static __be32
 763 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 764               struct nfsd4_secinfo *secinfo)
 765 {
 766         struct svc_fh resfh;
 767         struct svc_export *exp;
 768         struct dentry *dentry;
 769         __be32 err;
 770
 771         fh_init(&resfh, NFS4_FHSIZE);
 772         err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 773                                     secinfo->si_name, secinfo->si_namelen,
 774                                     &exp, &dentry);
 775         if (err)
 776                 return err;
 777         if (dentry->d_inode == NULL) {
 778                 exp_put(exp);
 779                 err = nfserr_noent;
 780         } else
 781                 secinfo->si_exp = exp;
 782         dput(dentry);
 783         return err;
 784 }
 785
 786 static __be32
 787 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 788               struct nfsd4_setattr *setattr)
 789 {
 790         __be32 status = nfs_ok;
 791
 792         if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 793                 nfs4_lock_state();
 794                 status = nfs4_preprocess_stateid_op(cstate,
 795                         &setattr->sa_stateid, WR_STATE, NULL);
 796                 nfs4_unlock_state();
 797                 if (status) {
 798                         dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 799                         return status;
 800                 }
 801         }
 802         status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);
 803         if (status)
 804                 return status;
 805         status = nfs_ok;
 806
 807         status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 808                                     nfsd_attrmask);
 809         if (status)
 810                 goto out;
 811
 812         if (setattr->sa_acl != NULL)
 813                 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 814                                             setattr->sa_acl);
 815         if (status)
 816                 goto out;
 817         status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 818                                 0, (time_t)0);
 819 out:
 820         mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);
 821         return status;
 822 }
 823
 824 static __be32
 825 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 826             struct nfsd4_write *write)
 827 {
 828         stateid_t *stateid = &write->wr_stateid;
 829         struct file *filp = NULL;
 830         u32 *p;
 831         __be32 status = nfs_ok;
 832         unsigned long cnt;
 833
 834         /* no need to check permission - this will be done in nfsd_write() */
 835
 836         if (write->wr_offset >= OFFSET_MAX)
 837                 return nfserr_inval;
 838
 839         nfs4_lock_state();
 840         status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
 841         if (filp)
 842                 get_file(filp);
 843         nfs4_unlock_state();
 844
 845         if (status) {
 846                 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 847                 return status;
 848         }
 849
 850         cnt = write->wr_buflen;
 851         write->wr_how_written = write->wr_stable_how;
 852         p = (u32 *)write->wr_verifier.data;
 853         *p++ = nfssvc_boot.tv_sec;
 854         *p++ = nfssvc_boot.tv_usec;
 855
 856         status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 857                              write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 858                              &cnt, &write->wr_how_written);
 859         if (filp)
 860                 fput(filp);
 861
 862         write->wr_bytes_written = cnt;
 863
 864         if (status == nfserr_symlink)
 865                 status = nfserr_inval;
 866         return status;
 867 }
 868
 869 /* This routine never returns NFS_OK!  If there are no other errors, it
 870  * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 871  * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 872  * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 873  */
 874 static __be32
 875 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 876              struct nfsd4_verify *verify)
 877 {
 878         __be32 *buf, *p;
 879         int count;
 880         __be32 status;
 881
 882         status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 883         if (status)
 884                 return status;
 885
 886         status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 887         if (status)
 888                 return status;
 889
 890         if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 891             || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 892                 return nfserr_inval;
 893         if (verify->ve_attrlen & 3)
 894                 return nfserr_inval;
 895
 896         /* count in words:
 897          *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 898          */
 899         count = 4 + (verify->ve_attrlen >> 2);
 900         buf = kmalloc(count << 2, GFP_KERNEL);
 901         if (!buf)
 902                 return nfserr_resource;
 903
 904         status = nfsd4_encode_fattr(&cstate->current_fh,
 905                                     cstate->current_fh.fh_export,
 906                                     cstate->current_fh.fh_dentry, buf,
 907                                     &count, verify->ve_bmval,
 908                                     rqstp, 0);
 909
 910         /* this means that nfsd4_encode_fattr() ran out of space */
 911         if (status == nfserr_resource && count == 0)
 912                 status = nfserr_not_same;
 913         if (status)
 914                 goto out_kfree;
 915
 916         /* skip bitmap */
 917         p = buf + 1 + ntohl(buf[0]);
 918         status = nfserr_not_same;
 919         if (ntohl(*p++) != verify->ve_attrlen)
 920                 goto out_kfree;
 921         if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 922                 status = nfserr_same;
 923
 924 out_kfree:
 925         kfree(buf);
 926         return status;
 927 }
 928
 929 static __be32
 930 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 931               struct nfsd4_verify *verify)
 932 {
 933         __be32 status;
 934
 935         status = _nfsd4_verify(rqstp, cstate, verify);
 936         return status == nfserr_not_same ? nfs_ok : status;
 937 }
 938
 939 static __be32
 940 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 941              struct nfsd4_verify *verify)
 942 {
 943         __be32 status;
 944
 945         status = _nfsd4_verify(rqstp, cstate, verify);
 946         return status == nfserr_same ? nfs_ok : status;
 947 }
 948
 949 /*
 950  * NULL call.
 951  */
 952 static __be32
 953 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
 954 {
 955         return nfs_ok;
 956 }
 957
 958 static inline void nfsd4_increment_op_stats(u32 opnum)
 959 {
 960         if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
 961                 nfsdstats.nfs4_opcount[opnum]++;
 962 }
 963
 964 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
 965                               void *);
 966 enum nfsd4_op_flags {
 967         ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
 968         ALLOWED_ON_ABSENT_FS = 2 << 0,  /* ops processed on absent fs */
 969         ALLOWED_AS_FIRST_OP = 3 << 0,   /* ops reqired first in compound */
 970 };
 971
 972 struct nfsd4_operation {
 973         nfsd4op_func op_func;
 974         u32 op_flags;
 975         char *op_name;
 976 };
 977
 978 static struct nfsd4_operation nfsd4_ops[];
 979
 980 static const char *nfsd4_op_name(unsigned opnum);
 981
 982 /*
 983  * Enforce NFSv4.1 COMPOUND ordering rules.
 984  *
 985  * TODO:
 986  * - enforce NFS4ERR_NOT_ONLY_OP,
 987  * - DESTROY_SESSION MUST be the final operation in the COMPOUND request.
 988  */
 989 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args)
 990 {
 991         if (args->minorversion && args->opcnt > 0) {
 992                 struct nfsd4_op *op = &args->ops[0];
 993                 return (op->status == nfserr_op_illegal) ||
 994                        (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP);
 995         }
 996         return true;
 997 }
 998
 999 /*
1000  * COMPOUND call.
1001  */
1002 static __be32
1003 nfsd4_proc_compound(struct svc_rqst *rqstp,
1004                     struct nfsd4_compoundargs *args,
1005                     struct nfsd4_compoundres *resp)
1006 {
1007         struct nfsd4_op *op;
1008         struct nfsd4_operation *opdesc;
1009         struct nfsd4_compound_state *cstate = &resp->cstate;
1010         int             slack_bytes;
1011         __be32          status;
1012
1013         resp->xbuf = &rqstp->rq_res;
1014         resp->p = rqstp->rq_res.head[0].iov_base +
1015                                                 rqstp->rq_res.head[0].iov_len;
1016         resp->tagp = resp->p;
1017         /* reserve space for: taglen, tag, and opcnt */
1018         resp->p += 2 + XDR_QUADLEN(args->taglen);
1019         resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1020         resp->taglen = args->taglen;
1021         resp->tag = args->tag;
1022         resp->opcnt = 0;
1023         resp->rqstp = rqstp;
1024         resp->cstate.minorversion = args->minorversion;
1025         resp->cstate.replay_owner = NULL;
1026         fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1027         fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1028         /* Use the deferral mechanism only for NFSv4.0 compounds */
1029         rqstp->rq_usedeferral = (args->minorversion == 0);
1030
1031         /*
1032          * According to RFC3010, this takes precedence over all other errors.
1033          */
1034         status = nfserr_minor_vers_mismatch;
1035         if (args->minorversion > nfsd_supported_minorversion)
1036                 goto out;
1037
1038         if (!nfs41_op_ordering_ok(args)) {
1039                 op = &args->ops[0];
1040                 op->status = nfserr_sequence_pos;
1041                 goto encode_op;
1042         }
1043
1044         status = nfs_ok;
1045         while (!status && resp->opcnt < args->opcnt) {
1046                 op = &args->ops[resp->opcnt++];
1047
1048                 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1049                         resp->opcnt, args->opcnt, op->opnum,
1050                         nfsd4_op_name(op->opnum));
1051                 /*
1052                  * The XDR decode routines may have pre-set op->status;
1053                  * for example, if there is a miscellaneous XDR error
1054                  * it will be set to nfserr_bad_xdr.
1055                  */
1056                 if (op->status)
1057                         goto encode_op;
1058
1059                 /* We must be able to encode a successful response to
1060                  * this operation, with enough room left over to encode a
1061                  * failed response to the next operation.  If we don't
1062                  * have enough room, fail with ERR_RESOURCE.
1063                  */
1064                 slack_bytes = (char *)resp->end - (char *)resp->p;
1065                 if (slack_bytes < COMPOUND_SLACK_SPACE
1066                                 + COMPOUND_ERR_SLACK_SPACE) {
1067                         BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1068                         op->status = nfserr_resource;
1069                         goto encode_op;
1070                 }
1071
1072                 opdesc = &nfsd4_ops[op->opnum];
1073
1074                 if (!cstate->current_fh.fh_dentry) {
1075                         if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1076                                 op->status = nfserr_nofilehandle;
1077                                 goto encode_op;
1078                         }
1079                 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1080                           !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1081                         op->status = nfserr_moved;
1082                         goto encode_op;
1083                 }
1084
1085                 if (opdesc->op_func)
1086                         op->status = opdesc->op_func(rqstp, cstate, &op->u);
1087                 else
1088                         BUG_ON(op->status == nfs_ok);
1089
1090 encode_op:
1091                 /* Only from SEQUENCE */
1092                 if (resp->cstate.status == nfserr_replay_cache) {
1093                         dprintk("%s NFS4.1 replay from cache\n", __func__);
1094                         status = op->status;
1095                         goto out;
1096                 }
1097                 if (op->status == nfserr_replay_me) {
1098                         op->replay = &cstate->replay_owner->so_replay;
1099                         nfsd4_encode_replay(resp, op);
1100                         status = op->status = op->replay->rp_status;
1101                 } else {
1102                         nfsd4_encode_operation(resp, op);
1103                         status = op->status;
1104                 }
1105
1106                 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1107                         args->ops, args->opcnt, resp->opcnt, op->opnum,
1108                         be32_to_cpu(status));
1109
1110                 if (cstate->replay_owner) {
1111                         nfs4_put_stateowner(cstate->replay_owner);
1112                         cstate->replay_owner = NULL;
1113                 }
1114                 /* XXX Ugh, we need to get rid of this kind of special case: */
1115                 if (op->opnum == OP_READ && op->u.read.rd_filp)
1116                         fput(op->u.read.rd_filp);
1117
1118                 nfsd4_increment_op_stats(op->opnum);
1119         }
1120         if (!rqstp->rq_usedeferral && status == nfserr_dropit) {
1121                 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__);
1122                 status = nfserr_jukebox;
1123         }
1124
1125         resp->cstate.status = status;
1126         fh_put(&resp->cstate.current_fh);
1127         fh_put(&resp->cstate.save_fh);
1128         BUG_ON(resp->cstate.replay_owner);
1129 out:
1130         nfsd4_release_compoundargs(args);
1131         /* Reset deferral mechanism for RPC deferrals */
1132         rqstp->rq_usedeferral = 1;
1133         dprintk("nfsv4 compound returned %d\n", ntohl(status));
1134         return status;
1135 }
1136
1137 static struct nfsd4_operation nfsd4_ops[] = {
1138         [OP_ACCESS] = {
1139                 .op_func = (nfsd4op_func)nfsd4_access,
1140                 .op_name = "OP_ACCESS",
1141         },
1142         [OP_CLOSE] = {
1143                 .op_func = (nfsd4op_func)nfsd4_close,
1144                 .op_name = "OP_CLOSE",
1145         },
1146         [OP_COMMIT] = {
1147                 .op_func = (nfsd4op_func)nfsd4_commit,
1148                 .op_name = "OP_COMMIT",
1149         },
1150         [OP_CREATE] = {
1151                 .op_func = (nfsd4op_func)nfsd4_create,
1152                 .op_name = "OP_CREATE",
1153         },
1154         [OP_DELEGRETURN] = {
1155                 .op_func = (nfsd4op_func)nfsd4_delegreturn,
1156                 .op_name = "OP_DELEGRETURN",
1157         },
1158         [OP_GETATTR] = {
1159                 .op_func = (nfsd4op_func)nfsd4_getattr,
1160                 .op_flags = ALLOWED_ON_ABSENT_FS,
1161                 .op_name = "OP_GETATTR",
1162         },
1163         [OP_GETFH] = {
1164                 .op_func = (nfsd4op_func)nfsd4_getfh,
1165                 .op_name = "OP_GETFH",
1166         },
1167         [OP_LINK] = {
1168                 .op_func = (nfsd4op_func)nfsd4_link,
1169                 .op_name = "OP_LINK",
1170         },
1171         [OP_LOCK] = {
1172                 .op_func = (nfsd4op_func)nfsd4_lock,
1173                 .op_name = "OP_LOCK",
1174         },
1175         [OP_LOCKT] = {
1176                 .op_func = (nfsd4op_func)nfsd4_lockt,
1177                 .op_name = "OP_LOCKT",
1178         },
1179         [OP_LOCKU] = {
1180                 .op_func = (nfsd4op_func)nfsd4_locku,
1181                 .op_name = "OP_LOCKU",
1182         },
1183         [OP_LOOKUP] = {
1184                 .op_func = (nfsd4op_func)nfsd4_lookup,
1185                 .op_name = "OP_LOOKUP",
1186         },
1187         [OP_LOOKUPP] = {
1188                 .op_func = (nfsd4op_func)nfsd4_lookupp,
1189                 .op_name = "OP_LOOKUPP",
1190         },
1191         [OP_NVERIFY] = {
1192                 .op_func = (nfsd4op_func)nfsd4_nverify,
1193                 .op_name = "OP_NVERIFY",
1194         },
1195         [OP_OPEN] = {
1196                 .op_func = (nfsd4op_func)nfsd4_open,
1197                 .op_name = "OP_OPEN",
1198         },
1199         [OP_OPEN_CONFIRM] = {
1200                 .op_func = (nfsd4op_func)nfsd4_open_confirm,
1201                 .op_name = "OP_OPEN_CONFIRM",
1202         },
1203         [OP_OPEN_DOWNGRADE] = {
1204                 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1205                 .op_name = "OP_OPEN_DOWNGRADE",
1206         },
1207         [OP_PUTFH] = {
1208                 .op_func = (nfsd4op_func)nfsd4_putfh,
1209                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1210                 .op_name = "OP_PUTFH",
1211         },
1212         [OP_PUTPUBFH] = {
1213                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1214                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1215                 .op_name = "OP_PUTPUBFH",
1216         },
1217         [OP_PUTROOTFH] = {
1218                 .op_func = (nfsd4op_func)nfsd4_putrootfh,
1219                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1220                 .op_name = "OP_PUTROOTFH",
1221         },
1222         [OP_READ] = {
1223                 .op_func = (nfsd4op_func)nfsd4_read,
1224                 .op_name = "OP_READ",
1225         },
1226         [OP_READDIR] = {
1227                 .op_func = (nfsd4op_func)nfsd4_readdir,
1228                 .op_name = "OP_READDIR",
1229         },
1230         [OP_READLINK] = {
1231                 .op_func = (nfsd4op_func)nfsd4_readlink,
1232                 .op_name = "OP_READLINK",
1233         },
1234         [OP_REMOVE] = {
1235                 .op_func = (nfsd4op_func)nfsd4_remove,
1236                 .op_name = "OP_REMOVE",
1237         },
1238         [OP_RENAME] = {
1239                 .op_name = "OP_RENAME",
1240                 .op_func = (nfsd4op_func)nfsd4_rename,
1241         },
1242         [OP_RENEW] = {
1243                 .op_func = (nfsd4op_func)nfsd4_renew,
1244                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1245                 .op_name = "OP_RENEW",
1246         },
1247         [OP_RESTOREFH] = {
1248                 .op_func = (nfsd4op_func)nfsd4_restorefh,
1249                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1250                 .op_name = "OP_RESTOREFH",
1251         },
1252         [OP_SAVEFH] = {
1253                 .op_func = (nfsd4op_func)nfsd4_savefh,
1254                 .op_name = "OP_SAVEFH",
1255         },
1256         [OP_SECINFO] = {
1257                 .op_func = (nfsd4op_func)nfsd4_secinfo,
1258                 .op_name = "OP_SECINFO",
1259         },
1260         [OP_SETATTR] = {
1261                 .op_func = (nfsd4op_func)nfsd4_setattr,
1262                 .op_name = "OP_SETATTR",
1263         },
1264         [OP_SETCLIENTID] = {
1265                 .op_func = (nfsd4op_func)nfsd4_setclientid,
1266                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1267                 .op_name = "OP_SETCLIENTID",
1268         },
1269         [OP_SETCLIENTID_CONFIRM] = {
1270                 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1271                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1272                 .op_name = "OP_SETCLIENTID_CONFIRM",
1273         },
1274         [OP_VERIFY] = {
1275                 .op_func = (nfsd4op_func)nfsd4_verify,
1276                 .op_name = "OP_VERIFY",
1277         },
1278         [OP_WRITE] = {
1279                 .op_func = (nfsd4op_func)nfsd4_write,
1280                 .op_name = "OP_WRITE",
1281         },
1282         [OP_RELEASE_LOCKOWNER] = {
1283                 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1284                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS,
1285                 .op_name = "OP_RELEASE_LOCKOWNER",
1286         },
1287
1288         /* NFSv4.1 operations */
1289         [OP_EXCHANGE_ID] = {
1290                 .op_func = (nfsd4op_func)nfsd4_exchange_id,
1291                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1292                 .op_name = "OP_EXCHANGE_ID",
1293         },
1294         [OP_CREATE_SESSION] = {
1295                 .op_func = (nfsd4op_func)nfsd4_create_session,
1296                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1297                 .op_name = "OP_CREATE_SESSION",
1298         },
1299         [OP_DESTROY_SESSION] = {
1300                 .op_func = (nfsd4op_func)nfsd4_destroy_session,
1301                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1302                 .op_name = "OP_DESTROY_SESSION",
1303         },
1304         [OP_SEQUENCE] = {
1305                 .op_func = (nfsd4op_func)nfsd4_sequence,
1306                 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1307                 .op_name = "OP_SEQUENCE",
1308         },
1309 };
1310
1311 static const char *nfsd4_op_name(unsigned opnum)
1312 {
1313         if (opnum < ARRAY_SIZE(nfsd4_ops))
1314                 return nfsd4_ops[opnum].op_name;
1315         return "unknown_operation";
1316 }
1317
1318 #define nfsd4_voidres                   nfsd4_voidargs
1319 struct nfsd4_voidargs { int dummy; };
1320
1321 /*
1322  * TODO: At the present time, the NFSv4 server does not do XID caching
1323  * of requests.  Implementing XID caching would not be a serious problem,
1324  * although it would require a mild change in interfaces since one
1325  * doesn't know whether an NFSv4 request is idempotent until after the
1326  * XDR decode.  However, XID caching totally confuses pynfs (Peter
1327  * Astrand's regression testsuite for NFSv4 servers), which reuses
1328  * XID's liberally, so I've left it unimplemented until pynfs generates
1329  * better XID's.
1330  */
1331 static struct svc_procedure             nfsd_procedures4[2] = {
1332         [NFSPROC4_NULL] = {
1333                 .pc_func = (svc_procfunc) nfsd4_proc_null,
1334                 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1335                 .pc_argsize = sizeof(struct nfsd4_voidargs),
1336                 .pc_ressize = sizeof(struct nfsd4_voidres),
1337                 .pc_cachetype = RC_NOCACHE,
1338                 .pc_xdrressize = 1,
1339         },
1340         [NFSPROC4_COMPOUND] = {
1341                 .pc_func = (svc_procfunc) nfsd4_proc_compound,
1342                 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1343                 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1344                 .pc_argsize = sizeof(struct nfsd4_compoundargs),
1345                 .pc_ressize = sizeof(struct nfsd4_compoundres),
1346                 .pc_cachetype = RC_NOCACHE,
1347                 .pc_xdrressize = NFSD_BUFSIZE/4,
1348         },
1349 };
1350
1351 struct svc_version      nfsd_version4 = {
1352                 .vs_vers        = 4,
1353                 .vs_nproc       = 2,
1354                 .vs_proc        = nfsd_procedures4,
1355                 .vs_dispatch    = nfsd_dispatch,
1356                 .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1357 };
1358
1359 /*
1360  * Local variables:
1361  *  c-basic-offset: 8
1362  * End:
1363  */