linux/fs/nfsd/nfs4proc.c
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   1/*
   2 *  Server-side procedures for NFSv4.
   3 *
   4 *  Copyright (c) 2002 The Regents of the University of Michigan.
   5 *  All rights reserved.
   6 *
   7 *  Kendrick Smith <kmsmith@umich.edu>
   8 *  Andy Adamson   <andros@umich.edu>
   9 *
  10 *  Redistribution and use in source and binary forms, with or without
  11 *  modification, are permitted provided that the following conditions
  12 *  are met:
  13 *
  14 *  1. Redistributions of source code must retain the above copyright
  15 *     notice, this list of conditions and the following disclaimer.
  16 *  2. Redistributions in binary form must reproduce the above copyright
  17 *     notice, this list of conditions and the following disclaimer in the
  18 *     documentation and/or other materials provided with the distribution.
  19 *  3. Neither the name of the University nor the names of its
  20 *     contributors may be used to endorse or promote products derived
  21 *     from this software without specific prior written permission.
  22 *
  23 *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26 *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  30 *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34 */
  35#include <linux/file.h>
  36#include <linux/slab.h>
  37
  38#include "idmap.h"
  39#include "cache.h"
  40#include "xdr4.h"
  41#include "vfs.h"
  42#include "current_stateid.h"
  43
  44#define NFSDDBG_FACILITY                NFSDDBG_PROC
  45
  46static u32 nfsd_attrmask[] = {
  47        NFSD_WRITEABLE_ATTRS_WORD0,
  48        NFSD_WRITEABLE_ATTRS_WORD1,
  49        NFSD_WRITEABLE_ATTRS_WORD2
  50};
  51
  52static u32 nfsd41_ex_attrmask[] = {
  53        NFSD_SUPPATTR_EXCLCREAT_WORD0,
  54        NFSD_SUPPATTR_EXCLCREAT_WORD1,
  55        NFSD_SUPPATTR_EXCLCREAT_WORD2
  56};
  57
  58static __be32
  59check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
  60                   u32 *bmval, u32 *writable)
  61{
  62        struct dentry *dentry = cstate->current_fh.fh_dentry;
  63
  64        /*
  65         * Check about attributes are supported by the NFSv4 server or not.
  66         * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
  67         */
  68        if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
  69            (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
  70            (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
  71                return nfserr_attrnotsupp;
  72
  73        /*
  74         * Check FATTR4_WORD0_ACL can be supported
  75         * in current environment or not.
  76         */
  77        if (bmval[0] & FATTR4_WORD0_ACL) {
  78                if (!IS_POSIXACL(dentry->d_inode))
  79                        return nfserr_attrnotsupp;
  80        }
  81
  82        /*
  83         * According to spec, read-only attributes return ERR_INVAL.
  84         */
  85        if (writable) {
  86                if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
  87                    (bmval[2] & ~writable[2]))
  88                        return nfserr_inval;
  89        }
  90
  91        return nfs_ok;
  92}
  93
  94static __be32
  95nfsd4_check_open_attributes(struct svc_rqst *rqstp,
  96        struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
  97{
  98        __be32 status = nfs_ok;
  99
 100        if (open->op_create == NFS4_OPEN_CREATE) {
 101                if (open->op_createmode == NFS4_CREATE_UNCHECKED
 102                    || open->op_createmode == NFS4_CREATE_GUARDED)
 103                        status = check_attr_support(rqstp, cstate,
 104                                        open->op_bmval, nfsd_attrmask);
 105                else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
 106                        status = check_attr_support(rqstp, cstate,
 107                                        open->op_bmval, nfsd41_ex_attrmask);
 108        }
 109
 110        return status;
 111}
 112
 113static int
 114is_create_with_attrs(struct nfsd4_open *open)
 115{
 116        return open->op_create == NFS4_OPEN_CREATE
 117                && (open->op_createmode == NFS4_CREATE_UNCHECKED
 118                    || open->op_createmode == NFS4_CREATE_GUARDED
 119                    || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
 120}
 121
 122/*
 123 * if error occurs when setting the acl, just clear the acl bit
 124 * in the returned attr bitmap.
 125 */
 126static void
 127do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
 128                struct nfs4_acl *acl, u32 *bmval)
 129{
 130        __be32 status;
 131
 132        status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
 133        if (status)
 134                /*
 135                 * We should probably fail the whole open at this point,
 136                 * but we've already created the file, so it's too late;
 137                 * So this seems the least of evils:
 138                 */
 139                bmval[0] &= ~FATTR4_WORD0_ACL;
 140}
 141
 142static inline void
 143fh_dup2(struct svc_fh *dst, struct svc_fh *src)
 144{
 145        fh_put(dst);
 146        dget(src->fh_dentry);
 147        if (src->fh_export)
 148                cache_get(&src->fh_export->h);
 149        *dst = *src;
 150}
 151
 152static __be32
 153do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
 154{
 155        __be32 status;
 156
 157        if (open->op_truncate &&
 158                !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
 159                return nfserr_inval;
 160
 161        accmode |= NFSD_MAY_READ_IF_EXEC;
 162
 163        if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
 164                accmode |= NFSD_MAY_READ;
 165        if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
 166                accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
 167        if (open->op_share_deny & NFS4_SHARE_DENY_READ)
 168                accmode |= NFSD_MAY_WRITE;
 169
 170        status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
 171
 172        return status;
 173}
 174
 175static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
 176{
 177        umode_t mode = fh->fh_dentry->d_inode->i_mode;
 178
 179        if (S_ISREG(mode))
 180                return nfs_ok;
 181        if (S_ISDIR(mode))
 182                return nfserr_isdir;
 183        /*
 184         * Using err_symlink as our catch-all case may look odd; but
 185         * there's no other obvious error for this case in 4.0, and we
 186         * happen to know that it will cause the linux v4 client to do
 187         * the right thing on attempts to open something other than a
 188         * regular file.
 189         */
 190        return nfserr_symlink;
 191}
 192
 193static __be32
 194do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 195{
 196        struct svc_fh *resfh;
 197        int accmode;
 198        __be32 status;
 199
 200        resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
 201        if (!resfh)
 202                return nfserr_jukebox;
 203        fh_init(resfh, NFS4_FHSIZE);
 204        open->op_truncate = 0;
 205
 206        if (open->op_create) {
 207                /* FIXME: check session persistence and pnfs flags.
 208                 * The nfsv4.1 spec requires the following semantics:
 209                 *
 210                 * Persistent   | pNFS   | Server REQUIRED | Client Allowed
 211                 * Reply Cache  | server |                 |
 212                 * -------------+--------+-----------------+--------------------
 213                 * no           | no     | EXCLUSIVE4_1    | EXCLUSIVE4_1
 214                 *              |        |                 | (SHOULD)
 215                 *              |        | and EXCLUSIVE4  | or EXCLUSIVE4
 216                 *              |        |                 | (SHOULD NOT)
 217                 * no           | yes    | EXCLUSIVE4_1    | EXCLUSIVE4_1
 218                 * yes          | no     | GUARDED4        | GUARDED4
 219                 * yes          | yes    | GUARDED4        | GUARDED4
 220                 */
 221
 222                /*
 223                 * Note: create modes (UNCHECKED,GUARDED...) are the same
 224                 * in NFSv4 as in v3 except EXCLUSIVE4_1.
 225                 */
 226                status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
 227                                        open->op_fname.len, &open->op_iattr,
 228                                        resfh, open->op_createmode,
 229                                        (u32 *)open->op_verf.data,
 230                                        &open->op_truncate, &open->op_created);
 231
 232                /*
 233                 * Following rfc 3530 14.2.16, use the returned bitmask
 234                 * to indicate which attributes we used to store the
 235                 * verifier:
 236                 */
 237                if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
 238                        open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
 239                                                        FATTR4_WORD1_TIME_MODIFY);
 240        } else {
 241                status = nfsd_lookup(rqstp, current_fh,
 242                                     open->op_fname.data, open->op_fname.len, resfh);
 243                fh_unlock(current_fh);
 244        }
 245        if (status)
 246                goto out;
 247        status = nfsd_check_obj_isreg(resfh);
 248        if (status)
 249                goto out;
 250
 251        if (is_create_with_attrs(open) && open->op_acl != NULL)
 252                do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval);
 253
 254        /* set reply cache */
 255        fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 256                        &resfh->fh_handle);
 257        accmode = NFSD_MAY_NOP;
 258        if (open->op_created)
 259                accmode |= NFSD_MAY_OWNER_OVERRIDE;
 260        status = do_open_permission(rqstp, resfh, open, accmode);
 261        set_change_info(&open->op_cinfo, current_fh);
 262        fh_dup2(current_fh, resfh);
 263out:
 264        fh_put(resfh);
 265        kfree(resfh);
 266        return status;
 267}
 268
 269static __be32
 270do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
 271{
 272        __be32 status;
 273
 274        /* We don't know the target directory, and therefore can not
 275        * set the change info
 276        */
 277
 278        memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
 279
 280        /* set replay cache */
 281        fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
 282                        &current_fh->fh_handle);
 283
 284        open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
 285                (open->op_iattr.ia_size == 0);
 286
 287        status = do_open_permission(rqstp, current_fh, open,
 288                                    NFSD_MAY_OWNER_OVERRIDE);
 289
 290        return status;
 291}
 292
 293static void
 294copy_clientid(clientid_t *clid, struct nfsd4_session *session)
 295{
 296        struct nfsd4_sessionid *sid =
 297                        (struct nfsd4_sessionid *)session->se_sessionid.data;
 298
 299        clid->cl_boot = sid->clientid.cl_boot;
 300        clid->cl_id = sid->clientid.cl_id;
 301}
 302
 303static __be32
 304nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 305           struct nfsd4_open *open)
 306{
 307        __be32 status;
 308        struct nfsd4_compoundres *resp;
 309
 310        dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
 311                (int)open->op_fname.len, open->op_fname.data,
 312                open->op_openowner);
 313
 314        /* This check required by spec. */
 315        if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
 316                return nfserr_inval;
 317
 318        open->op_created = 0;
 319        /*
 320         * RFC5661 18.51.3
 321         * Before RECLAIM_COMPLETE done, server should deny new lock
 322         */
 323        if (nfsd4_has_session(cstate) &&
 324            !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
 325                      &cstate->session->se_client->cl_flags) &&
 326            open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 327                return nfserr_grace;
 328
 329        if (nfsd4_has_session(cstate))
 330                copy_clientid(&open->op_clientid, cstate->session);
 331
 332        nfs4_lock_state();
 333
 334        /* check seqid for replay. set nfs4_owner */
 335        resp = rqstp->rq_resp;
 336        status = nfsd4_process_open1(&resp->cstate, open);
 337        if (status == nfserr_replay_me) {
 338                struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
 339                fh_put(&cstate->current_fh);
 340                fh_copy_shallow(&cstate->current_fh.fh_handle,
 341                                &rp->rp_openfh);
 342                status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 343                if (status)
 344                        dprintk("nfsd4_open: replay failed"
 345                                " restoring previous filehandle\n");
 346                else
 347                        status = nfserr_replay_me;
 348        }
 349        if (status)
 350                goto out;
 351
 352        status = nfsd4_check_open_attributes(rqstp, cstate, open);
 353        if (status)
 354                goto out;
 355
 356        /* Openowner is now set, so sequence id will get bumped.  Now we need
 357         * these checks before we do any creates: */
 358        status = nfserr_grace;
 359        if (locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
 360                goto out;
 361        status = nfserr_no_grace;
 362        if (!locks_in_grace(SVC_NET(rqstp)) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
 363                goto out;
 364
 365        switch (open->op_claim_type) {
 366                case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 367                case NFS4_OPEN_CLAIM_NULL:
 368                        status = do_open_lookup(rqstp, &cstate->current_fh,
 369                                                open);
 370                        if (status)
 371                                goto out;
 372                        break;
 373                case NFS4_OPEN_CLAIM_PREVIOUS:
 374                        open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 375                        status = nfs4_check_open_reclaim(&open->op_clientid, cstate->minorversion);
 376                        if (status)
 377                                goto out;
 378                case NFS4_OPEN_CLAIM_FH:
 379                case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 380                        status = do_open_fhandle(rqstp, &cstate->current_fh,
 381                                                 open);
 382                        if (status)
 383                                goto out;
 384                        break;
 385                case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 386                case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 387                        open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 388                        dprintk("NFSD: unsupported OPEN claim type %d\n",
 389                                open->op_claim_type);
 390                        status = nfserr_notsupp;
 391                        goto out;
 392                default:
 393                        dprintk("NFSD: Invalid OPEN claim type %d\n",
 394                                open->op_claim_type);
 395                        status = nfserr_inval;
 396                        goto out;
 397        }
 398        /*
 399         * nfsd4_process_open2() does the actual opening of the file.  If
 400         * successful, it (1) truncates the file if open->op_truncate was
 401         * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
 402         */
 403        status = nfsd4_process_open2(rqstp, &cstate->current_fh, open);
 404        WARN_ON(status && open->op_created);
 405out:
 406        nfsd4_cleanup_open_state(open, status);
 407        if (open->op_openowner)
 408                cstate->replay_owner = &open->op_openowner->oo_owner;
 409        else
 410                nfs4_unlock_state();
 411        return status;
 412}
 413
 414/*
 415 * filehandle-manipulating ops.
 416 */
 417static __be32
 418nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 419            struct svc_fh **getfh)
 420{
 421        if (!cstate->current_fh.fh_dentry)
 422                return nfserr_nofilehandle;
 423
 424        *getfh = &cstate->current_fh;
 425        return nfs_ok;
 426}
 427
 428static __be32
 429nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 430            struct nfsd4_putfh *putfh)
 431{
 432        fh_put(&cstate->current_fh);
 433        cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
 434        memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
 435               putfh->pf_fhlen);
 436        return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
 437}
 438
 439static __be32
 440nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 441                void *arg)
 442{
 443        __be32 status;
 444
 445        fh_put(&cstate->current_fh);
 446        status = exp_pseudoroot(rqstp, &cstate->current_fh);
 447        return status;
 448}
 449
 450static __be32
 451nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 452                void *arg)
 453{
 454        if (!cstate->save_fh.fh_dentry)
 455                return nfserr_restorefh;
 456
 457        fh_dup2(&cstate->current_fh, &cstate->save_fh);
 458        if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
 459                memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
 460                SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
 461        }
 462        return nfs_ok;
 463}
 464
 465static __be32
 466nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 467             void *arg)
 468{
 469        if (!cstate->current_fh.fh_dentry)
 470                return nfserr_nofilehandle;
 471
 472        fh_dup2(&cstate->save_fh, &cstate->current_fh);
 473        if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
 474                memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
 475                SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
 476        }
 477        return nfs_ok;
 478}
 479
 480/*
 481 * misc nfsv4 ops
 482 */
 483static __be32
 484nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 485             struct nfsd4_access *access)
 486{
 487        if (access->ac_req_access & ~NFS3_ACCESS_FULL)
 488                return nfserr_inval;
 489
 490        access->ac_resp_access = access->ac_req_access;
 491        return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
 492                           &access->ac_supported);
 493}
 494
 495static void gen_boot_verifier(nfs4_verifier *verifier)
 496{
 497        __be32 verf[2];
 498
 499        verf[0] = (__be32)nfssvc_boot.tv_sec;
 500        verf[1] = (__be32)nfssvc_boot.tv_usec;
 501        memcpy(verifier->data, verf, sizeof(verifier->data));
 502}
 503
 504static __be32
 505nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 506             struct nfsd4_commit *commit)
 507{
 508        gen_boot_verifier(&commit->co_verf);
 509        return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
 510                             commit->co_count);
 511}
 512
 513static __be32
 514nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 515             struct nfsd4_create *create)
 516{
 517        struct svc_fh resfh;
 518        __be32 status;
 519        dev_t rdev;
 520
 521        fh_init(&resfh, NFS4_FHSIZE);
 522
 523        status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
 524                           NFSD_MAY_CREATE);
 525        if (status)
 526                return status;
 527
 528        status = check_attr_support(rqstp, cstate, create->cr_bmval,
 529                                    nfsd_attrmask);
 530        if (status)
 531                return status;
 532
 533        switch (create->cr_type) {
 534        case NF4LNK:
 535                /* ugh! we have to null-terminate the linktext, or
 536                 * vfs_symlink() will choke.  it is always safe to
 537                 * null-terminate by brute force, since at worst we
 538                 * will overwrite the first byte of the create namelen
 539                 * in the XDR buffer, which has already been extracted
 540                 * during XDR decode.
 541                 */
 542                create->cr_linkname[create->cr_linklen] = 0;
 543
 544                status = nfsd_symlink(rqstp, &cstate->current_fh,
 545                                      create->cr_name, create->cr_namelen,
 546                                      create->cr_linkname, create->cr_linklen,
 547                                      &resfh, &create->cr_iattr);
 548                break;
 549
 550        case NF4BLK:
 551                rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 552                if (MAJOR(rdev) != create->cr_specdata1 ||
 553                    MINOR(rdev) != create->cr_specdata2)
 554                        return nfserr_inval;
 555                status = nfsd_create(rqstp, &cstate->current_fh,
 556                                     create->cr_name, create->cr_namelen,
 557                                     &create->cr_iattr, S_IFBLK, rdev, &resfh);
 558                break;
 559
 560        case NF4CHR:
 561                rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
 562                if (MAJOR(rdev) != create->cr_specdata1 ||
 563                    MINOR(rdev) != create->cr_specdata2)
 564                        return nfserr_inval;
 565                status = nfsd_create(rqstp, &cstate->current_fh,
 566                                     create->cr_name, create->cr_namelen,
 567                                     &create->cr_iattr,S_IFCHR, rdev, &resfh);
 568                break;
 569
 570        case NF4SOCK:
 571                status = nfsd_create(rqstp, &cstate->current_fh,
 572                                     create->cr_name, create->cr_namelen,
 573                                     &create->cr_iattr, S_IFSOCK, 0, &resfh);
 574                break;
 575
 576        case NF4FIFO:
 577                status = nfsd_create(rqstp, &cstate->current_fh,
 578                                     create->cr_name, create->cr_namelen,
 579                                     &create->cr_iattr, S_IFIFO, 0, &resfh);
 580                break;
 581
 582        case NF4DIR:
 583                create->cr_iattr.ia_valid &= ~ATTR_SIZE;
 584                status = nfsd_create(rqstp, &cstate->current_fh,
 585                                     create->cr_name, create->cr_namelen,
 586                                     &create->cr_iattr, S_IFDIR, 0, &resfh);
 587                break;
 588
 589        default:
 590                status = nfserr_badtype;
 591        }
 592
 593        if (status)
 594                goto out;
 595
 596        if (create->cr_acl != NULL)
 597                do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
 598                                create->cr_bmval);
 599
 600        fh_unlock(&cstate->current_fh);
 601        set_change_info(&create->cr_cinfo, &cstate->current_fh);
 602        fh_dup2(&cstate->current_fh, &resfh);
 603out:
 604        fh_put(&resfh);
 605        return status;
 606}
 607
 608static __be32
 609nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 610              struct nfsd4_getattr *getattr)
 611{
 612        __be32 status;
 613
 614        status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 615        if (status)
 616                return status;
 617
 618        if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 619                return nfserr_inval;
 620
 621        getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 622        getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 623        getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 624
 625        getattr->ga_fhp = &cstate->current_fh;
 626        return nfs_ok;
 627}
 628
 629static __be32
 630nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 631           struct nfsd4_link *link)
 632{
 633        __be32 status = nfserr_nofilehandle;
 634
 635        if (!cstate->save_fh.fh_dentry)
 636                return status;
 637        status = nfsd_link(rqstp, &cstate->current_fh,
 638                           link->li_name, link->li_namelen, &cstate->save_fh);
 639        if (!status)
 640                set_change_info(&link->li_cinfo, &cstate->current_fh);
 641        return status;
 642}
 643
 644static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
 645{
 646        struct svc_fh tmp_fh;
 647        __be32 ret;
 648
 649        fh_init(&tmp_fh, NFS4_FHSIZE);
 650        ret = exp_pseudoroot(rqstp, &tmp_fh);
 651        if (ret)
 652                return ret;
 653        if (tmp_fh.fh_dentry == fh->fh_dentry) {
 654                fh_put(&tmp_fh);
 655                return nfserr_noent;
 656        }
 657        fh_put(&tmp_fh);
 658        return nfsd_lookup(rqstp, fh, "..", 2, fh);
 659}
 660
 661static __be32
 662nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 663              void *arg)
 664{
 665        return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 666}
 667
 668static __be32
 669nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 670             struct nfsd4_lookup *lookup)
 671{
 672        return nfsd_lookup(rqstp, &cstate->current_fh,
 673                           lookup->lo_name, lookup->lo_len,
 674                           &cstate->current_fh);
 675}
 676
 677static __be32
 678nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 679           struct nfsd4_read *read)
 680{
 681        __be32 status;
 682
 683        /* no need to check permission - this will be done in nfsd_read() */
 684
 685        read->rd_filp = NULL;
 686        if (read->rd_offset >= OFFSET_MAX)
 687                return nfserr_inval;
 688
 689        nfs4_lock_state();
 690        /* check stateid */
 691        if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 692                                                 cstate, &read->rd_stateid,
 693                                                 RD_STATE, &read->rd_filp))) {
 694                dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
 695                goto out;
 696        }
 697        if (read->rd_filp)
 698                get_file(read->rd_filp);
 699        status = nfs_ok;
 700out:
 701        nfs4_unlock_state();
 702        read->rd_rqstp = rqstp;
 703        read->rd_fhp = &cstate->current_fh;
 704        return status;
 705}
 706
 707static __be32
 708nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 709              struct nfsd4_readdir *readdir)
 710{
 711        u64 cookie = readdir->rd_cookie;
 712        static const nfs4_verifier zeroverf;
 713
 714        /* no need to check permission - this will be done in nfsd_readdir() */
 715
 716        if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
 717                return nfserr_inval;
 718
 719        readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
 720        readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
 721        readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
 722
 723        if ((cookie == 1) || (cookie == 2) ||
 724            (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
 725                return nfserr_bad_cookie;
 726
 727        readdir->rd_rqstp = rqstp;
 728        readdir->rd_fhp = &cstate->current_fh;
 729        return nfs_ok;
 730}
 731
 732static __be32
 733nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 734               struct nfsd4_readlink *readlink)
 735{
 736        readlink->rl_rqstp = rqstp;
 737        readlink->rl_fhp = &cstate->current_fh;
 738        return nfs_ok;
 739}
 740
 741static __be32
 742nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 743             struct nfsd4_remove *remove)
 744{
 745        __be32 status;
 746
 747        if (locks_in_grace(SVC_NET(rqstp)))
 748                return nfserr_grace;
 749        status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
 750                             remove->rm_name, remove->rm_namelen);
 751        if (!status) {
 752                fh_unlock(&cstate->current_fh);
 753                set_change_info(&remove->rm_cinfo, &cstate->current_fh);
 754        }
 755        return status;
 756}
 757
 758static __be32
 759nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 760             struct nfsd4_rename *rename)
 761{
 762        __be32 status = nfserr_nofilehandle;
 763
 764        if (!cstate->save_fh.fh_dentry)
 765                return status;
 766        if (locks_in_grace(SVC_NET(rqstp)) &&
 767                !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
 768                return nfserr_grace;
 769        status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
 770                             rename->rn_snamelen, &cstate->current_fh,
 771                             rename->rn_tname, rename->rn_tnamelen);
 772
 773        /* the underlying filesystem returns different error's than required
 774         * by NFSv4. both save_fh and current_fh have been verified.. */
 775        if (status == nfserr_isdir)
 776                status = nfserr_exist;
 777        else if ((status == nfserr_notdir) &&
 778                  (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) &&
 779                   S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode)))
 780                status = nfserr_exist;
 781
 782        if (!status) {
 783                set_change_info(&rename->rn_sinfo, &cstate->current_fh);
 784                set_change_info(&rename->rn_tinfo, &cstate->save_fh);
 785        }
 786        return status;
 787}
 788
 789static __be32
 790nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 791              struct nfsd4_secinfo *secinfo)
 792{
 793        struct svc_fh resfh;
 794        struct svc_export *exp;
 795        struct dentry *dentry;
 796        __be32 err;
 797
 798        fh_init(&resfh, NFS4_FHSIZE);
 799        err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
 800        if (err)
 801                return err;
 802        err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
 803                                    secinfo->si_name, secinfo->si_namelen,
 804                                    &exp, &dentry);
 805        if (err)
 806                return err;
 807        if (dentry->d_inode == NULL) {
 808                exp_put(exp);
 809                err = nfserr_noent;
 810        } else
 811                secinfo->si_exp = exp;
 812        dput(dentry);
 813        if (cstate->minorversion)
 814                /* See rfc 5661 section 2.6.3.1.1.8 */
 815                fh_put(&cstate->current_fh);
 816        return err;
 817}
 818
 819static __be32
 820nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 821              struct nfsd4_secinfo_no_name *sin)
 822{
 823        __be32 err;
 824
 825        switch (sin->sin_style) {
 826        case NFS4_SECINFO_STYLE4_CURRENT_FH:
 827                break;
 828        case NFS4_SECINFO_STYLE4_PARENT:
 829                err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
 830                if (err)
 831                        return err;
 832                break;
 833        default:
 834                return nfserr_inval;
 835        }
 836        exp_get(cstate->current_fh.fh_export);
 837        sin->sin_exp = cstate->current_fh.fh_export;
 838        fh_put(&cstate->current_fh);
 839        return nfs_ok;
 840}
 841
 842static __be32
 843nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 844              struct nfsd4_setattr *setattr)
 845{
 846        __be32 status = nfs_ok;
 847        int err;
 848
 849        if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
 850                nfs4_lock_state();
 851                status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
 852                        &setattr->sa_stateid, WR_STATE, NULL);
 853                nfs4_unlock_state();
 854                if (status) {
 855                        dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
 856                        return status;
 857                }
 858        }
 859        err = fh_want_write(&cstate->current_fh);
 860        if (err)
 861                return nfserrno(err);
 862        status = nfs_ok;
 863
 864        status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
 865                                    nfsd_attrmask);
 866        if (status)
 867                goto out;
 868
 869        if (setattr->sa_acl != NULL)
 870                status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
 871                                            setattr->sa_acl);
 872        if (status)
 873                goto out;
 874        status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
 875                                0, (time_t)0);
 876out:
 877        fh_drop_write(&cstate->current_fh);
 878        return status;
 879}
 880
 881static __be32
 882nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 883            struct nfsd4_write *write)
 884{
 885        stateid_t *stateid = &write->wr_stateid;
 886        struct file *filp = NULL;
 887        __be32 status = nfs_ok;
 888        unsigned long cnt;
 889
 890        /* no need to check permission - this will be done in nfsd_write() */
 891
 892        if (write->wr_offset >= OFFSET_MAX)
 893                return nfserr_inval;
 894
 895        nfs4_lock_state();
 896        status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
 897                                        cstate, stateid, WR_STATE, &filp);
 898        if (filp)
 899                get_file(filp);
 900        nfs4_unlock_state();
 901
 902        if (status) {
 903                dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
 904                return status;
 905        }
 906
 907        cnt = write->wr_buflen;
 908        write->wr_how_written = write->wr_stable_how;
 909        gen_boot_verifier(&write->wr_verifier);
 910
 911        status =  nfsd_write(rqstp, &cstate->current_fh, filp,
 912                             write->wr_offset, rqstp->rq_vec, write->wr_vlen,
 913                             &cnt, &write->wr_how_written);
 914        if (filp)
 915                fput(filp);
 916
 917        write->wr_bytes_written = cnt;
 918
 919        return status;
 920}
 921
 922/* This routine never returns NFS_OK!  If there are no other errors, it
 923 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
 924 * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
 925 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
 926 */
 927static __be32
 928_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 929             struct nfsd4_verify *verify)
 930{
 931        __be32 *buf, *p;
 932        int count;
 933        __be32 status;
 934
 935        status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
 936        if (status)
 937                return status;
 938
 939        status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
 940        if (status)
 941                return status;
 942
 943        if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
 944            || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
 945                return nfserr_inval;
 946        if (verify->ve_attrlen & 3)
 947                return nfserr_inval;
 948
 949        /* count in words:
 950         *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
 951         */
 952        count = 4 + (verify->ve_attrlen >> 2);
 953        buf = kmalloc(count << 2, GFP_KERNEL);
 954        if (!buf)
 955                return nfserr_jukebox;
 956
 957        status = nfsd4_encode_fattr(&cstate->current_fh,
 958                                    cstate->current_fh.fh_export,
 959                                    cstate->current_fh.fh_dentry, buf,
 960                                    &count, verify->ve_bmval,
 961                                    rqstp, 0);
 962
 963        /* this means that nfsd4_encode_fattr() ran out of space */
 964        if (status == nfserr_resource && count == 0)
 965                status = nfserr_not_same;
 966        if (status)
 967                goto out_kfree;
 968
 969        /* skip bitmap */
 970        p = buf + 1 + ntohl(buf[0]);
 971        status = nfserr_not_same;
 972        if (ntohl(*p++) != verify->ve_attrlen)
 973                goto out_kfree;
 974        if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
 975                status = nfserr_same;
 976
 977out_kfree:
 978        kfree(buf);
 979        return status;
 980}
 981
 982static __be32
 983nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 984              struct nfsd4_verify *verify)
 985{
 986        __be32 status;
 987
 988        status = _nfsd4_verify(rqstp, cstate, verify);
 989        return status == nfserr_not_same ? nfs_ok : status;
 990}
 991
 992static __be32
 993nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 994             struct nfsd4_verify *verify)
 995{
 996        __be32 status;
 997
 998        status = _nfsd4_verify(rqstp, cstate, verify);
 999        return status == nfserr_same ? nfs_ok : status;
1000}
1001
1002/*
1003 * NULL call.
1004 */
1005static __be32
1006nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1007{
1008        return nfs_ok;
1009}
1010
1011static inline void nfsd4_increment_op_stats(u32 opnum)
1012{
1013        if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1014                nfsdstats.nfs4_opcount[opnum]++;
1015}
1016
1017typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1018                              void *);
1019typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
1020typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1021typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
1022
1023enum nfsd4_op_flags {
1024        ALLOWED_WITHOUT_FH = 1 << 0,    /* No current filehandle required */
1025        ALLOWED_ON_ABSENT_FS = 1 << 1,  /* ops processed on absent fs */
1026        ALLOWED_AS_FIRST_OP = 1 << 2,   /* ops reqired first in compound */
1027        /* For rfc 5661 section 2.6.3.1.1: */
1028        OP_HANDLES_WRONGSEC = 1 << 3,
1029        OP_IS_PUTFH_LIKE = 1 << 4,
1030        /*
1031         * These are the ops whose result size we estimate before
1032         * encoding, to avoid performing an op then not being able to
1033         * respond or cache a response.  This includes writes and setattrs
1034         * as well as the operations usually called "nonidempotent":
1035         */
1036        OP_MODIFIES_SOMETHING = 1 << 5,
1037        /*
1038         * Cache compounds containing these ops in the xid-based drc:
1039         * We use the DRC for compounds containing non-idempotent
1040         * operations, *except* those that are 4.1-specific (since
1041         * sessions provide their own EOS), and except for stateful
1042         * operations other than setclientid and setclientid_confirm
1043         * (since sequence numbers provide EOS for open, lock, etc in
1044         * the v4.0 case).
1045         */
1046        OP_CACHEME = 1 << 6,
1047        /*
1048         * These are ops which clear current state id.
1049         */
1050        OP_CLEAR_STATEID = 1 << 7,
1051};
1052
1053struct nfsd4_operation {
1054        nfsd4op_func op_func;
1055        u32 op_flags;
1056        char *op_name;
1057        /* Try to get response size before operation */
1058        nfsd4op_rsize op_rsize_bop;
1059        stateid_getter op_get_currentstateid;
1060        stateid_setter op_set_currentstateid;
1061};
1062
1063static struct nfsd4_operation nfsd4_ops[];
1064
1065#ifdef NFSD_DEBUG
1066static const char *nfsd4_op_name(unsigned opnum);
1067#endif
1068
1069/*
1070 * Enforce NFSv4.1 COMPOUND ordering rules:
1071 *
1072 * Also note, enforced elsewhere:
1073 *      - SEQUENCE other than as first op results in
1074 *        NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1075 *      - BIND_CONN_TO_SESSION must be the only op in its compound.
1076 *        (Enforced in nfsd4_bind_conn_to_session().)
1077 *      - DESTROY_SESSION must be the final operation in a compound, if
1078 *        sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1079 *        (Enforced in nfsd4_destroy_session().)
1080 */
1081static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
1082{
1083        struct nfsd4_op *op = &args->ops[0];
1084
1085        /* These ordering requirements don't apply to NFSv4.0: */
1086        if (args->minorversion == 0)
1087                return nfs_ok;
1088        /* This is weird, but OK, not our problem: */
1089        if (args->opcnt == 0)
1090                return nfs_ok;
1091        if (op->status == nfserr_op_illegal)
1092                return nfs_ok;
1093        if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1094                return nfserr_op_not_in_session;
1095        if (op->opnum == OP_SEQUENCE)
1096                return nfs_ok;
1097        if (args->opcnt != 1)
1098                return nfserr_not_only_op;
1099        return nfs_ok;
1100}
1101
1102static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1103{
1104        return &nfsd4_ops[op->opnum];
1105}
1106
1107bool nfsd4_cache_this_op(struct nfsd4_op *op)
1108{
1109        return OPDESC(op)->op_flags & OP_CACHEME;
1110}
1111
1112static bool need_wrongsec_check(struct svc_rqst *rqstp)
1113{
1114        struct nfsd4_compoundres *resp = rqstp->rq_resp;
1115        struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1116        struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1117        struct nfsd4_op *next = &argp->ops[resp->opcnt];
1118        struct nfsd4_operation *thisd;
1119        struct nfsd4_operation *nextd;
1120
1121        thisd = OPDESC(this);
1122        /*
1123         * Most ops check wronsec on our own; only the putfh-like ops
1124         * have special rules.
1125         */
1126        if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1127                return false;
1128        /*
1129         * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1130         * put-filehandle operation if we're not going to use the
1131         * result:
1132         */
1133        if (argp->opcnt == resp->opcnt)
1134                return false;
1135
1136        nextd = OPDESC(next);
1137        /*
1138         * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1139         * errors themselves as necessary; others should check for them
1140         * now:
1141         */
1142        return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1143}
1144
1145/*
1146 * COMPOUND call.
1147 */
1148static __be32
1149nfsd4_proc_compound(struct svc_rqst *rqstp,
1150                    struct nfsd4_compoundargs *args,
1151                    struct nfsd4_compoundres *resp)
1152{
1153        struct nfsd4_op *op;
1154        struct nfsd4_operation *opdesc;
1155        struct nfsd4_compound_state *cstate = &resp->cstate;
1156        int             slack_bytes;
1157        u32             plen = 0;
1158        __be32          status;
1159
1160        resp->xbuf = &rqstp->rq_res;
1161        resp->p = rqstp->rq_res.head[0].iov_base +
1162                                                rqstp->rq_res.head[0].iov_len;
1163        resp->tagp = resp->p;
1164        /* reserve space for: taglen, tag, and opcnt */
1165        resp->p += 2 + XDR_QUADLEN(args->taglen);
1166        resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
1167        resp->taglen = args->taglen;
1168        resp->tag = args->tag;
1169        resp->opcnt = 0;
1170        resp->rqstp = rqstp;
1171        resp->cstate.minorversion = args->minorversion;
1172        resp->cstate.replay_owner = NULL;
1173        resp->cstate.session = NULL;
1174        fh_init(&resp->cstate.current_fh, NFS4_FHSIZE);
1175        fh_init(&resp->cstate.save_fh, NFS4_FHSIZE);
1176        /*
1177         * Don't use the deferral mechanism for NFSv4; compounds make it
1178         * too hard to avoid non-idempotency problems.
1179         */
1180        rqstp->rq_usedeferral = 0;
1181
1182        /*
1183         * According to RFC3010, this takes precedence over all other errors.
1184         */
1185        status = nfserr_minor_vers_mismatch;
1186        if (args->minorversion > nfsd_supported_minorversion)
1187                goto out;
1188
1189        status = nfs41_check_op_ordering(args);
1190        if (status) {
1191                op = &args->ops[0];
1192                op->status = status;
1193                goto encode_op;
1194        }
1195
1196        while (!status && resp->opcnt < args->opcnt) {
1197                op = &args->ops[resp->opcnt++];
1198
1199                dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1200                        resp->opcnt, args->opcnt, op->opnum,
1201                        nfsd4_op_name(op->opnum));
1202                /*
1203                 * The XDR decode routines may have pre-set op->status;
1204                 * for example, if there is a miscellaneous XDR error
1205                 * it will be set to nfserr_bad_xdr.
1206                 */
1207                if (op->status)
1208                        goto encode_op;
1209
1210                /* We must be able to encode a successful response to
1211                 * this operation, with enough room left over to encode a
1212                 * failed response to the next operation.  If we don't
1213                 * have enough room, fail with ERR_RESOURCE.
1214                 */
1215                slack_bytes = (char *)resp->end - (char *)resp->p;
1216                if (slack_bytes < COMPOUND_SLACK_SPACE
1217                                + COMPOUND_ERR_SLACK_SPACE) {
1218                        BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE);
1219                        op->status = nfserr_resource;
1220                        goto encode_op;
1221                }
1222
1223                opdesc = OPDESC(op);
1224
1225                if (!cstate->current_fh.fh_dentry) {
1226                        if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
1227                                op->status = nfserr_nofilehandle;
1228                                goto encode_op;
1229                        }
1230                } else if (cstate->current_fh.fh_export->ex_fslocs.migrated &&
1231                          !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
1232                        op->status = nfserr_moved;
1233                        goto encode_op;
1234                }
1235
1236                /* If op is non-idempotent */
1237                if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
1238                        plen = opdesc->op_rsize_bop(rqstp, op);
1239                        op->status = nfsd4_check_resp_size(resp, plen);
1240                }
1241
1242                if (op->status)
1243                        goto encode_op;
1244
1245                if (opdesc->op_func) {
1246                        if (opdesc->op_get_currentstateid)
1247                                opdesc->op_get_currentstateid(cstate, &op->u);
1248                        op->status = opdesc->op_func(rqstp, cstate, &op->u);
1249                } else
1250                        BUG_ON(op->status == nfs_ok);
1251
1252                if (!op->status) {
1253                        if (opdesc->op_set_currentstateid)
1254                                opdesc->op_set_currentstateid(cstate, &op->u);
1255
1256                        if (opdesc->op_flags & OP_CLEAR_STATEID)
1257                                clear_current_stateid(cstate);
1258
1259                        if (need_wrongsec_check(rqstp))
1260                                op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp);
1261                }
1262
1263encode_op:
1264                /* Only from SEQUENCE */
1265                if (resp->cstate.status == nfserr_replay_cache) {
1266                        dprintk("%s NFS4.1 replay from cache\n", __func__);
1267                        status = op->status;
1268                        goto out;
1269                }
1270                if (op->status == nfserr_replay_me) {
1271                        op->replay = &cstate->replay_owner->so_replay;
1272                        nfsd4_encode_replay(resp, op);
1273                        status = op->status = op->replay->rp_status;
1274                } else {
1275                        nfsd4_encode_operation(resp, op);
1276                        status = op->status;
1277                }
1278
1279                dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1280                        args->ops, args->opcnt, resp->opcnt, op->opnum,
1281                        be32_to_cpu(status));
1282
1283                if (cstate->replay_owner) {
1284                        nfs4_unlock_state();
1285                        cstate->replay_owner = NULL;
1286                }
1287                /* XXX Ugh, we need to get rid of this kind of special case: */
1288                if (op->opnum == OP_READ && op->u.read.rd_filp)
1289                        fput(op->u.read.rd_filp);
1290
1291                nfsd4_increment_op_stats(op->opnum);
1292        }
1293
1294        resp->cstate.status = status;
1295        fh_put(&resp->cstate.current_fh);
1296        fh_put(&resp->cstate.save_fh);
1297        BUG_ON(resp->cstate.replay_owner);
1298out:
1299        /* Reset deferral mechanism for RPC deferrals */
1300        rqstp->rq_usedeferral = 1;
1301        dprintk("nfsv4 compound returned %d\n", ntohl(status));
1302        return status;
1303}
1304
1305#define op_encode_hdr_size              (2)
1306#define op_encode_stateid_maxsz         (XDR_QUADLEN(NFS4_STATEID_SIZE))
1307#define op_encode_verifier_maxsz        (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1308#define op_encode_change_info_maxsz     (5)
1309#define nfs4_fattr_bitmap_maxsz         (4)
1310
1311#define op_encode_lockowner_maxsz       (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1312#define op_encode_lock_denied_maxsz     (8 + op_encode_lockowner_maxsz)
1313
1314#define nfs4_owner_maxsz                (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1315
1316#define op_encode_ace_maxsz             (3 + nfs4_owner_maxsz)
1317#define op_encode_delegation_maxsz      (1 + op_encode_stateid_maxsz + 1 + \
1318                                         op_encode_ace_maxsz)
1319
1320#define op_encode_channel_attrs_maxsz   (6 + 1 + 1)
1321
1322static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1323{
1324        return (op_encode_hdr_size) * sizeof(__be32);
1325}
1326
1327static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1328{
1329        return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1330}
1331
1332static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1333{
1334        return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1335}
1336
1337static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1338{
1339        return (op_encode_hdr_size + op_encode_change_info_maxsz
1340                + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1341}
1342
1343static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1344{
1345        return (op_encode_hdr_size + op_encode_change_info_maxsz)
1346                * sizeof(__be32);
1347}
1348
1349static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1350{
1351        return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1352                * sizeof(__be32);
1353}
1354
1355static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1356{
1357        return (op_encode_hdr_size + op_encode_stateid_maxsz
1358                + op_encode_change_info_maxsz + 1
1359                + nfs4_fattr_bitmap_maxsz
1360                + op_encode_delegation_maxsz) * sizeof(__be32);
1361}
1362
1363static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1364{
1365        u32 maxcount = 0, rlen = 0;
1366
1367        maxcount = svc_max_payload(rqstp);
1368        rlen = op->u.read.rd_length;
1369
1370        if (rlen > maxcount)
1371                rlen = maxcount;
1372
1373        return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen;
1374}
1375
1376static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1377{
1378        u32 rlen = op->u.readdir.rd_maxcount;
1379
1380        if (rlen > PAGE_SIZE)
1381                rlen = PAGE_SIZE;
1382
1383        return (op_encode_hdr_size + op_encode_verifier_maxsz)
1384                 * sizeof(__be32) + rlen;
1385}
1386
1387static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1388{
1389        return (op_encode_hdr_size + op_encode_change_info_maxsz)
1390                * sizeof(__be32);
1391}
1392
1393static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1394{
1395        return (op_encode_hdr_size + op_encode_change_info_maxsz
1396                + op_encode_change_info_maxsz) * sizeof(__be32);
1397}
1398
1399static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1400{
1401        return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1402}
1403
1404static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1405{
1406        return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32);
1407}
1408
1409static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1410{
1411        return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1412}
1413
1414static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1415{
1416        return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
1417                1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\
1418                2 + /*eir_server_owner.so_minor_id */\
1419                /* eir_server_owner.so_major_id<> */\
1420                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1421                /* eir_server_scope<> */\
1422                XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1423                1 + /* eir_server_impl_id array length */\
1424                0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1425}
1426
1427static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1428{
1429        return (op_encode_hdr_size + \
1430                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1431                2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1432}
1433
1434static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1435{
1436        return (op_encode_hdr_size + \
1437                XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1438                2 + /* csr_sequence, csr_flags */\
1439                op_encode_channel_attrs_maxsz + \
1440                op_encode_channel_attrs_maxsz) * sizeof(__be32);
1441}
1442
1443static struct nfsd4_operation nfsd4_ops[] = {
1444        [OP_ACCESS] = {
1445                .op_func = (nfsd4op_func)nfsd4_access,
1446                .op_name = "OP_ACCESS",
1447        },
1448        [OP_CLOSE] = {
1449                .op_func = (nfsd4op_func)nfsd4_close,
1450                .op_flags = OP_MODIFIES_SOMETHING,
1451                .op_name = "OP_CLOSE",
1452                .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1453                .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1454                .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
1455        },
1456        [OP_COMMIT] = {
1457                .op_func = (nfsd4op_func)nfsd4_commit,
1458                .op_flags = OP_MODIFIES_SOMETHING,
1459                .op_name = "OP_COMMIT",
1460                .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
1461        },
1462        [OP_CREATE] = {
1463                .op_func = (nfsd4op_func)nfsd4_create,
1464                .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
1465                .op_name = "OP_CREATE",
1466                .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
1467        },
1468        [OP_DELEGRETURN] = {
1469                .op_func = (nfsd4op_func)nfsd4_delegreturn,
1470                .op_flags = OP_MODIFIES_SOMETHING,
1471                .op_name = "OP_DELEGRETURN",
1472                .op_rsize_bop = nfsd4_only_status_rsize,
1473                .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
1474        },
1475        [OP_GETATTR] = {
1476                .op_func = (nfsd4op_func)nfsd4_getattr,
1477                .op_flags = ALLOWED_ON_ABSENT_FS,
1478                .op_name = "OP_GETATTR",
1479        },
1480        [OP_GETFH] = {
1481                .op_func = (nfsd4op_func)nfsd4_getfh,
1482                .op_name = "OP_GETFH",
1483        },
1484        [OP_LINK] = {
1485                .op_func = (nfsd4op_func)nfsd4_link,
1486                .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1487                                | OP_CACHEME,
1488                .op_name = "OP_LINK",
1489                .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
1490        },
1491        [OP_LOCK] = {
1492                .op_func = (nfsd4op_func)nfsd4_lock,
1493                .op_flags = OP_MODIFIES_SOMETHING,
1494                .op_name = "OP_LOCK",
1495                .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
1496                .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
1497        },
1498        [OP_LOCKT] = {
1499                .op_func = (nfsd4op_func)nfsd4_lockt,
1500                .op_name = "OP_LOCKT",
1501        },
1502        [OP_LOCKU] = {
1503                .op_func = (nfsd4op_func)nfsd4_locku,
1504                .op_flags = OP_MODIFIES_SOMETHING,
1505                .op_name = "OP_LOCKU",
1506                .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1507                .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
1508        },
1509        [OP_LOOKUP] = {
1510                .op_func = (nfsd4op_func)nfsd4_lookup,
1511                .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1512                .op_name = "OP_LOOKUP",
1513        },
1514        [OP_LOOKUPP] = {
1515                .op_func = (nfsd4op_func)nfsd4_lookupp,
1516                .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
1517                .op_name = "OP_LOOKUPP",
1518        },
1519        [OP_NVERIFY] = {
1520                .op_func = (nfsd4op_func)nfsd4_nverify,
1521                .op_name = "OP_NVERIFY",
1522        },
1523        [OP_OPEN] = {
1524                .op_func = (nfsd4op_func)nfsd4_open,
1525                .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1526                .op_name = "OP_OPEN",
1527                .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
1528                .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
1529        },
1530        [OP_OPEN_CONFIRM] = {
1531                .op_func = (nfsd4op_func)nfsd4_open_confirm,
1532                .op_flags = OP_MODIFIES_SOMETHING,
1533                .op_name = "OP_OPEN_CONFIRM",
1534                .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1535        },
1536        [OP_OPEN_DOWNGRADE] = {
1537                .op_func = (nfsd4op_func)nfsd4_open_downgrade,
1538                .op_flags = OP_MODIFIES_SOMETHING,
1539                .op_name = "OP_OPEN_DOWNGRADE",
1540                .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
1541                .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
1542                .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
1543        },
1544        [OP_PUTFH] = {
1545                .op_func = (nfsd4op_func)nfsd4_putfh,
1546                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1547                                | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1548                                | OP_CLEAR_STATEID,
1549                .op_name = "OP_PUTFH",
1550                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1551        },
1552        [OP_PUTPUBFH] = {
1553                .op_func = (nfsd4op_func)nfsd4_putrootfh,
1554                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1555                                | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1556                                | OP_CLEAR_STATEID,
1557                .op_name = "OP_PUTPUBFH",
1558                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1559        },
1560        [OP_PUTROOTFH] = {
1561                .op_func = (nfsd4op_func)nfsd4_putrootfh,
1562                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1563                                | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING
1564                                | OP_CLEAR_STATEID,
1565                .op_name = "OP_PUTROOTFH",
1566                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1567        },
1568        [OP_READ] = {
1569                .op_func = (nfsd4op_func)nfsd4_read,
1570                .op_flags = OP_MODIFIES_SOMETHING,
1571                .op_name = "OP_READ",
1572                .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
1573                .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
1574        },
1575        [OP_READDIR] = {
1576                .op_func = (nfsd4op_func)nfsd4_readdir,
1577                .op_flags = OP_MODIFIES_SOMETHING,
1578                .op_name = "OP_READDIR",
1579                .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
1580        },
1581        [OP_READLINK] = {
1582                .op_func = (nfsd4op_func)nfsd4_readlink,
1583                .op_name = "OP_READLINK",
1584        },
1585        [OP_REMOVE] = {
1586                .op_func = (nfsd4op_func)nfsd4_remove,
1587                .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1588                .op_name = "OP_REMOVE",
1589                .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
1590        },
1591        [OP_RENAME] = {
1592                .op_func = (nfsd4op_func)nfsd4_rename,
1593                .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1594                .op_name = "OP_RENAME",
1595                .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
1596        },
1597        [OP_RENEW] = {
1598                .op_func = (nfsd4op_func)nfsd4_renew,
1599                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1600                                | OP_MODIFIES_SOMETHING,
1601                .op_name = "OP_RENEW",
1602                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1603
1604        },
1605        [OP_RESTOREFH] = {
1606                .op_func = (nfsd4op_func)nfsd4_restorefh,
1607                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1608                                | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
1609                .op_name = "OP_RESTOREFH",
1610                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1611        },
1612        [OP_SAVEFH] = {
1613                .op_func = (nfsd4op_func)nfsd4_savefh,
1614                .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
1615                .op_name = "OP_SAVEFH",
1616                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1617        },
1618        [OP_SECINFO] = {
1619                .op_func = (nfsd4op_func)nfsd4_secinfo,
1620                .op_flags = OP_HANDLES_WRONGSEC,
1621                .op_name = "OP_SECINFO",
1622        },
1623        [OP_SETATTR] = {
1624                .op_func = (nfsd4op_func)nfsd4_setattr,
1625                .op_name = "OP_SETATTR",
1626                .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1627                .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1628                .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
1629        },
1630        [OP_SETCLIENTID] = {
1631                .op_func = (nfsd4op_func)nfsd4_setclientid,
1632                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1633                                | OP_MODIFIES_SOMETHING | OP_CACHEME,
1634                .op_name = "OP_SETCLIENTID",
1635                .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
1636        },
1637        [OP_SETCLIENTID_CONFIRM] = {
1638                .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
1639                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1640                                | OP_MODIFIES_SOMETHING | OP_CACHEME,
1641                .op_name = "OP_SETCLIENTID_CONFIRM",
1642                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1643        },
1644        [OP_VERIFY] = {
1645                .op_func = (nfsd4op_func)nfsd4_verify,
1646                .op_name = "OP_VERIFY",
1647        },
1648        [OP_WRITE] = {
1649                .op_func = (nfsd4op_func)nfsd4_write,
1650                .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1651                .op_name = "OP_WRITE",
1652                .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
1653                .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
1654        },
1655        [OP_RELEASE_LOCKOWNER] = {
1656                .op_func = (nfsd4op_func)nfsd4_release_lockowner,
1657                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
1658                                | OP_MODIFIES_SOMETHING,
1659                .op_name = "OP_RELEASE_LOCKOWNER",
1660                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1661        },
1662
1663        /* NFSv4.1 operations */
1664        [OP_EXCHANGE_ID] = {
1665                .op_func = (nfsd4op_func)nfsd4_exchange_id,
1666                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1667                                | OP_MODIFIES_SOMETHING,
1668                .op_name = "OP_EXCHANGE_ID",
1669                .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
1670        },
1671        [OP_BIND_CONN_TO_SESSION] = {
1672                .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
1673                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1674                                | OP_MODIFIES_SOMETHING,
1675                .op_name = "OP_BIND_CONN_TO_SESSION",
1676                .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1677        },
1678        [OP_CREATE_SESSION] = {
1679                .op_func = (nfsd4op_func)nfsd4_create_session,
1680                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1681                                | OP_MODIFIES_SOMETHING,
1682                .op_name = "OP_CREATE_SESSION",
1683                .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
1684        },
1685        [OP_DESTROY_SESSION] = {
1686                .op_func = (nfsd4op_func)nfsd4_destroy_session,
1687                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1688                                | OP_MODIFIES_SOMETHING,
1689                .op_name = "OP_DESTROY_SESSION",
1690                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1691        },
1692        [OP_SEQUENCE] = {
1693                .op_func = (nfsd4op_func)nfsd4_sequence,
1694                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
1695                .op_name = "OP_SEQUENCE",
1696        },
1697        [OP_DESTROY_CLIENTID] = {
1698                .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
1699                .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
1700                                | OP_MODIFIES_SOMETHING,
1701                .op_name = "OP_DESTROY_CLIENTID",
1702                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1703        },
1704        [OP_RECLAIM_COMPLETE] = {
1705                .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
1706                .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1707                .op_name = "OP_RECLAIM_COMPLETE",
1708                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1709        },
1710        [OP_SECINFO_NO_NAME] = {
1711                .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
1712                .op_flags = OP_HANDLES_WRONGSEC,
1713                .op_name = "OP_SECINFO_NO_NAME",
1714        },
1715        [OP_TEST_STATEID] = {
1716                .op_func = (nfsd4op_func)nfsd4_test_stateid,
1717                .op_flags = ALLOWED_WITHOUT_FH,
1718                .op_name = "OP_TEST_STATEID",
1719        },
1720        [OP_FREE_STATEID] = {
1721                .op_func = (nfsd4op_func)nfsd4_free_stateid,
1722                .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
1723                .op_name = "OP_FREE_STATEID",
1724                .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
1725        },
1726};
1727
1728#ifdef NFSD_DEBUG
1729static const char *nfsd4_op_name(unsigned opnum)
1730{
1731        if (opnum < ARRAY_SIZE(nfsd4_ops))
1732                return nfsd4_ops[opnum].op_name;
1733        return "unknown_operation";
1734}
1735#endif
1736
1737#define nfsd4_voidres                   nfsd4_voidargs
1738struct nfsd4_voidargs { int dummy; };
1739
1740static struct svc_procedure             nfsd_procedures4[2] = {
1741        [NFSPROC4_NULL] = {
1742                .pc_func = (svc_procfunc) nfsd4_proc_null,
1743                .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
1744                .pc_argsize = sizeof(struct nfsd4_voidargs),
1745                .pc_ressize = sizeof(struct nfsd4_voidres),
1746                .pc_cachetype = RC_NOCACHE,
1747                .pc_xdrressize = 1,
1748        },
1749        [NFSPROC4_COMPOUND] = {
1750                .pc_func = (svc_procfunc) nfsd4_proc_compound,
1751                .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
1752                .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
1753                .pc_argsize = sizeof(struct nfsd4_compoundargs),
1754                .pc_ressize = sizeof(struct nfsd4_compoundres),
1755                .pc_release = nfsd4_release_compoundargs,
1756                .pc_cachetype = RC_NOCACHE,
1757                .pc_xdrressize = NFSD_BUFSIZE/4,
1758        },
1759};
1760
1761struct svc_version      nfsd_version4 = {
1762                .vs_vers        = 4,
1763                .vs_nproc       = 2,
1764                .vs_proc        = nfsd_procedures4,
1765                .vs_dispatch    = nfsd_dispatch,
1766                .vs_xdrsize     = NFS4_SVC_XDRSIZE,
1767};
1768
1769/*
1770 * Local variables:
1771 *  c-basic-offset: 8
1772 * End:
1773 */
1774
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