fs/nfsd/nfs4xdr.c

   1 /*
   2  *  fs/nfs/nfs4xdr.c
   3  *
   4  *  Server-side XDR 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  * TODO: Neil Brown made the following observation:  We currently
  38  * initially reserve NFSD_BUFSIZE space on the transmit queue and
  39  * never release any of that until the request is complete.
  40  * It would be good to calculate a new maximum response size while
  41  * decoding the COMPOUND, and call svc_reserve with this number
  42  * at the end of nfs4svc_decode_compoundargs.
  43  */
  44
  45 #include <linux/param.h>
  46 #include <linux/smp.h>
  47 #include <linux/smp_lock.h>
  48 #include <linux/fs.h>
  49 #include <linux/namei.h>
  50 #include <linux/vfs.h>
  51 #include <linux/sunrpc/xdr.h>
  52 #include <linux/sunrpc/svc.h>
  53 #include <linux/sunrpc/clnt.h>
  54 #include <linux/nfsd/nfsd.h>
  55 #include <linux/nfsd/state.h>
  56 #include <linux/nfsd/xdr4.h>
  57 #include <linux/nfsd_idmap.h>
  58 #include <linux/nfs4.h>
  59 #include <linux/nfs4_acl.h>
  60 #include <linux/vserver/xid.h>
  61
  62 #define NFSDDBG_FACILITY                NFSDDBG_XDR
  63
  64 static int
  65 check_filename(char *str, int len, int err)
  66 {
  67         int i;
  68
  69         if (len == 0)
  70                 return nfserr_inval;
  71         if (isdotent(str, len))
  72                 return err;
  73         for (i = 0; i < len; i++)
  74                 if (str[i] == '/')
  75                         return err;
  76         return 0;
  77 }
  78
  79 /*
  80  * START OF "GENERIC" DECODE ROUTINES.
  81  *   These may look a little ugly since they are imported from a "generic"
  82  * set of XDR encode/decode routines which are intended to be shared by
  83  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
  84  *
  85  * If the pain of reading these is too great, it should be a straightforward
  86  * task to translate them into Linux-specific versions which are more
  87  * consistent with the style used in NFSv2/v3...
  88  */
  89 #define DECODE_HEAD                             \
  90         u32 *p;                                 \
  91         int status
  92 #define DECODE_TAIL                             \
  93         status = 0;                             \
  94 out:                                            \
  95         return status;                          \
  96 xdr_error:                                      \
  97         printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
  98         status = nfserr_bad_xdr;                \
  99         goto out
 100
 101 #define READ32(x)         (x) = ntohl(*p++)
 102 #define READ64(x)         do {                  \
 103         (x) = (u64)ntohl(*p++) << 32;           \
 104         (x) |= ntohl(*p++);                     \
 105 } while (0)
 106 #define READTIME(x)       do {                  \
 107         p++;                                    \
 108         (x) = ntohl(*p++);                      \
 109         p++;                                    \
 110 } while (0)
 111 #define READMEM(x,nbytes) do {                  \
 112         x = (char *)p;                          \
 113         p += XDR_QUADLEN(nbytes);               \
 114 } while (0)
 115 #define SAVEMEM(x,nbytes) do {                  \
 116         if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
 117                 savemem(argp, p, nbytes) :      \
 118                 (char *)p)) {                   \
 119                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
 120                 goto xdr_error;                 \
 121                 }                               \
 122         p += XDR_QUADLEN(nbytes);               \
 123 } while (0)
 124 #define COPYMEM(x,nbytes) do {                  \
 125         memcpy((x), p, nbytes);                 \
 126         p += XDR_QUADLEN(nbytes);               \
 127 } while (0)
 128
 129 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
 130 #define READ_BUF(nbytes)  do {                  \
 131         if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) {     \
 132                 p = argp->p;                    \
 133                 argp->p += XDR_QUADLEN(nbytes); \
 134         } else if (!(p = read_buf(argp, nbytes))) { \
 135                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
 136                 goto xdr_error;                 \
 137         }                                       \
 138 } while (0)
 139
 140 u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
 141 {
 142         /* We want more bytes than seem to be available.
 143          * Maybe we need a new page, maybe we have just run out
 144          */
 145         int avail = (char*)argp->end - (char*)argp->p;
 146         u32 *p;
 147         if (avail + argp->pagelen < nbytes)
 148                 return NULL;
 149         if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
 150                 return NULL;
 151         /* ok, we can do it with the current plus the next page */
 152         if (nbytes <= sizeof(argp->tmp))
 153                 p = argp->tmp;
 154         else {
 155                 if (argp->tmpp)
 156                         kfree(argp->tmpp);
 157                 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
 158                 if (!p)
 159                         return NULL;
 160
 161         }
 162         memcpy(p, argp->p, avail);
 163         /* step to next page */
 164         argp->p = page_address(argp->pagelist[0]);
 165         argp->pagelist++;
 166         if (argp->pagelen < PAGE_SIZE) {
 167                 argp->end = p + (argp->pagelen>>2);
 168                 argp->pagelen = 0;
 169         } else {
 170                 argp->end = p + (PAGE_SIZE>>2);
 171                 argp->pagelen -= PAGE_SIZE;
 172         }
 173         memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
 174         argp->p += XDR_QUADLEN(nbytes - avail);
 175         return p;
 176 }
 177
 178 static int
 179 defer_free(struct nfsd4_compoundargs *argp,
 180                 void (*release)(const void *), void *p)
 181 {
 182         struct tmpbuf *tb;
 183
 184         tb = kmalloc(sizeof(*tb), GFP_KERNEL);
 185         if (!tb)
 186                 return -ENOMEM;
 187         tb->buf = p;
 188         tb->release = release;
 189         tb->next = argp->to_free;
 190         argp->to_free = tb;
 191         return 0;
 192 }
 193
 194 char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
 195 {
 196         void *new = NULL;
 197         if (p == argp->tmp) {
 198                 new = kmalloc(nbytes, GFP_KERNEL);
 199                 if (!new) return NULL;
 200                 p = new;
 201                 memcpy(p, argp->tmp, nbytes);
 202         } else {
 203                 if (p != argp->tmpp)
 204                         BUG();
 205                 argp->tmpp = NULL;
 206         }
 207         if (defer_free(argp, kfree, p)) {
 208                 kfree(new);
 209                 return NULL;
 210         } else
 211                 return (char *)p;
 212 }
 213
 214
 215 static int
 216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
 217 {
 218         u32 bmlen;
 219         DECODE_HEAD;
 220
 221         bmval[0] = 0;
 222         bmval[1] = 0;
 223
 224         READ_BUF(4);
 225         READ32(bmlen);
 226         if (bmlen > 1000)
 227                 goto xdr_error;
 228
 229         READ_BUF(bmlen << 2);
 230         if (bmlen > 0)
 231                 READ32(bmval[0]);
 232         if (bmlen > 1)
 233                 READ32(bmval[1]);
 234
 235         DECODE_TAIL;
 236 }
 237
 238 static int
 239 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
 240     struct nfs4_acl **acl)
 241 {
 242         int expected_len, len = 0;
 243         u32 dummy32;
 244         char *buf;
 245
 246         DECODE_HEAD;
 247         iattr->ia_valid = 0;
 248         if ((status = nfsd4_decode_bitmap(argp, bmval)))
 249                 return status;
 250
 251         /*
 252          * According to spec, unsupported attributes return ERR_NOTSUPP;
 253          * read-only attributes return ERR_INVAL.
 254          */
 255         if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
 256                 return nfserr_attrnotsupp;
 257         if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
 258                 return nfserr_inval;
 259
 260         READ_BUF(4);
 261         READ32(expected_len);
 262
 263         if (bmval[0] & FATTR4_WORD0_SIZE) {
 264                 READ_BUF(8);
 265                 len += 8;
 266                 READ64(iattr->ia_size);
 267                 iattr->ia_valid |= ATTR_SIZE;
 268         }
 269         if (bmval[0] & FATTR4_WORD0_ACL) {
 270                 int nace, i;
 271                 struct nfs4_ace ace;
 272
 273                 READ_BUF(4); len += 4;
 274                 READ32(nace);
 275
 276                 *acl = nfs4_acl_new();
 277                 if (*acl == NULL) {
 278                         status = -ENOMEM;
 279                         goto out_nfserr;
 280                 }
 281                 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
 282
 283                 for (i = 0; i < nace; i++) {
 284                         READ_BUF(16); len += 16;
 285                         READ32(ace.type);
 286                         READ32(ace.flag);
 287                         READ32(ace.access_mask);
 288                         READ32(dummy32);
 289                         READ_BUF(dummy32);
 290                         len += XDR_QUADLEN(dummy32) << 2;
 291                         READMEM(buf, dummy32);
 292                         ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
 293                         status = 0;
 294                         if (ace.whotype != NFS4_ACL_WHO_NAMED)
 295                                 ace.who = 0;
 296                         else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
 297                                 status = nfsd_map_name_to_gid(argp->rqstp,
 298                                                 buf, dummy32, &ace.who);
 299                         else
 300                                 status = nfsd_map_name_to_uid(argp->rqstp,
 301                                                 buf, dummy32, &ace.who);
 302                         if (status)
 303                                 goto out_nfserr;
 304                         if (nfs4_acl_add_ace(*acl, ace.type, ace.flag,
 305                                  ace.access_mask, ace.whotype, ace.who) != 0) {
 306                                 status = -ENOMEM;
 307                                 goto out_nfserr;
 308                         }
 309                 }
 310         } else
 311                 *acl = NULL;
 312         if (bmval[1] & FATTR4_WORD1_MODE) {
 313                 READ_BUF(4);
 314                 len += 4;
 315                 READ32(iattr->ia_mode);
 316                 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
 317                 iattr->ia_valid |= ATTR_MODE;
 318         }
 319         if (bmval[1] & FATTR4_WORD1_OWNER) {
 320                 READ_BUF(4);
 321                 len += 4;
 322                 READ32(dummy32);
 323                 READ_BUF(dummy32);
 324                 len += (XDR_QUADLEN(dummy32) << 2);
 325                 READMEM(buf, dummy32);
 326                 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
 327                         goto out_nfserr;
 328                 iattr->ia_valid |= ATTR_UID;
 329         }
 330         if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
 331                 READ_BUF(4);
 332                 len += 4;
 333                 READ32(dummy32);
 334                 READ_BUF(dummy32);
 335                 len += (XDR_QUADLEN(dummy32) << 2);
 336                 READMEM(buf, dummy32);
 337                 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
 338                         goto out_nfserr;
 339                 iattr->ia_valid |= ATTR_GID;
 340         }
 341         if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
 342                 READ_BUF(4);
 343                 len += 4;
 344                 READ32(dummy32);
 345                 switch (dummy32) {
 346                 case NFS4_SET_TO_CLIENT_TIME:
 347                         /* We require the high 32 bits of 'seconds' to be 0, and we ignore
 348                            all 32 bits of 'nseconds'. */
 349                         READ_BUF(12);
 350                         len += 12;
 351                         READ32(dummy32);
 352                         if (dummy32)
 353                                 return nfserr_inval;
 354                         READ32(iattr->ia_atime.tv_sec);
 355                         READ32(iattr->ia_atime.tv_nsec);
 356                         if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
 357                                 return nfserr_inval;
 358                         iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
 359                         break;
 360                 case NFS4_SET_TO_SERVER_TIME:
 361                         iattr->ia_valid |= ATTR_ATIME;
 362                         break;
 363                 default:
 364                         goto xdr_error;
 365                 }
 366         }
 367         if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
 368                 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
 369                    all 32 bits of 'nseconds'. */
 370                 READ_BUF(12);
 371                 len += 12;
 372                 READ32(dummy32);
 373                 if (dummy32)
 374                         return nfserr_inval;
 375                 READ32(iattr->ia_ctime.tv_sec);
 376                 READ32(iattr->ia_ctime.tv_nsec);
 377                 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
 378                         return nfserr_inval;
 379                 iattr->ia_valid |= ATTR_CTIME;
 380         }
 381         if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
 382                 READ_BUF(4);
 383                 len += 4;
 384                 READ32(dummy32);
 385                 switch (dummy32) {
 386                 case NFS4_SET_TO_CLIENT_TIME:
 387                         /* We require the high 32 bits of 'seconds' to be 0, and we ignore
 388                            all 32 bits of 'nseconds'. */
 389                         READ_BUF(12);
 390                         len += 12;
 391                         READ32(dummy32);
 392                         if (dummy32)
 393                                 return nfserr_inval;
 394                         READ32(iattr->ia_mtime.tv_sec);
 395                         READ32(iattr->ia_mtime.tv_nsec);
 396                         if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
 397                                 return nfserr_inval;
 398                         iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
 399                         break;
 400                 case NFS4_SET_TO_SERVER_TIME:
 401                         iattr->ia_valid |= ATTR_MTIME;
 402                         break;
 403                 default:
 404                         goto xdr_error;
 405                 }
 406         }
 407         if (len != expected_len)
 408                 goto xdr_error;
 409
 410         DECODE_TAIL;
 411
 412 out_nfserr:
 413         status = nfserrno(status);
 414         goto out;
 415 }
 416
 417 static int
 418 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
 419 {
 420         DECODE_HEAD;
 421
 422         READ_BUF(4);
 423         READ32(access->ac_req_access);
 424
 425         DECODE_TAIL;
 426 }
 427
 428 static int
 429 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
 430 {
 431         DECODE_HEAD;
 432
 433         close->cl_stateowner = NULL;
 434         READ_BUF(4 + sizeof(stateid_t));
 435         READ32(close->cl_seqid);
 436         READ32(close->cl_stateid.si_generation);
 437         COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
 438
 439         DECODE_TAIL;
 440 }
 441
 442
 443 static int
 444 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
 445 {
 446         DECODE_HEAD;
 447
 448         READ_BUF(12);
 449         READ64(commit->co_offset);
 450         READ32(commit->co_count);
 451
 452         DECODE_TAIL;
 453 }
 454
 455 static int
 456 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
 457 {
 458         DECODE_HEAD;
 459
 460         READ_BUF(4);
 461         READ32(create->cr_type);
 462         switch (create->cr_type) {
 463         case NF4LNK:
 464                 READ_BUF(4);
 465                 READ32(create->cr_linklen);
 466                 READ_BUF(create->cr_linklen);
 467                 SAVEMEM(create->cr_linkname, create->cr_linklen);
 468                 break;
 469         case NF4BLK:
 470         case NF4CHR:
 471                 READ_BUF(8);
 472                 READ32(create->cr_specdata1);
 473                 READ32(create->cr_specdata2);
 474                 break;
 475         case NF4SOCK:
 476         case NF4FIFO:
 477         case NF4DIR:
 478         default:
 479                 break;
 480         }
 481
 482         READ_BUF(4);
 483         READ32(create->cr_namelen);
 484         READ_BUF(create->cr_namelen);
 485         SAVEMEM(create->cr_name, create->cr_namelen);
 486         if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
 487                 return status;
 488
 489         if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
 490                 goto out;
 491
 492         DECODE_TAIL;
 493 }
 494
 495 static inline int
 496 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
 497 {
 498         DECODE_HEAD;
 499
 500         READ_BUF(sizeof(stateid_t));
 501         READ32(dr->dr_stateid.si_generation);
 502         COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
 503
 504         DECODE_TAIL;
 505 }
 506
 507 static inline int
 508 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
 509 {
 510         return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
 511 }
 512
 513 static int
 514 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
 515 {
 516         DECODE_HEAD;
 517
 518         READ_BUF(4);
 519         READ32(link->li_namelen);
 520         READ_BUF(link->li_namelen);
 521         SAVEMEM(link->li_name, link->li_namelen);
 522         if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
 523                 return status;
 524
 525         DECODE_TAIL;
 526 }
 527
 528 static int
 529 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
 530 {
 531         DECODE_HEAD;
 532
 533         lock->lk_stateowner = NULL;
 534         /*
 535         * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
 536         */
 537         READ_BUF(28);
 538         READ32(lock->lk_type);
 539         if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
 540                 goto xdr_error;
 541         READ32(lock->lk_reclaim);
 542         READ64(lock->lk_offset);
 543         READ64(lock->lk_length);
 544         READ32(lock->lk_is_new);
 545
 546         if (lock->lk_is_new) {
 547                 READ_BUF(36);
 548                 READ32(lock->lk_new_open_seqid);
 549                 READ32(lock->lk_new_open_stateid.si_generation);
 550
 551                 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
 552                 READ32(lock->lk_new_lock_seqid);
 553                 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
 554                 READ32(lock->lk_new_owner.len);
 555                 READ_BUF(lock->lk_new_owner.len);
 556                 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
 557         } else {
 558                 READ_BUF(20);
 559                 READ32(lock->lk_old_lock_stateid.si_generation);
 560                 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
 561                 READ32(lock->lk_old_lock_seqid);
 562         }
 563
 564         DECODE_TAIL;
 565 }
 566
 567 static int
 568 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
 569 {
 570         DECODE_HEAD;
 571
 572         READ_BUF(32);
 573         READ32(lockt->lt_type);
 574         if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
 575                 goto xdr_error;
 576         READ64(lockt->lt_offset);
 577         READ64(lockt->lt_length);
 578         COPYMEM(&lockt->lt_clientid, 8);
 579         READ32(lockt->lt_owner.len);
 580         READ_BUF(lockt->lt_owner.len);
 581         READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
 582
 583         DECODE_TAIL;
 584 }
 585
 586 static int
 587 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
 588 {
 589         DECODE_HEAD;
 590
 591         locku->lu_stateowner = NULL;
 592         READ_BUF(24 + sizeof(stateid_t));
 593         READ32(locku->lu_type);
 594         if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
 595                 goto xdr_error;
 596         READ32(locku->lu_seqid);
 597         READ32(locku->lu_stateid.si_generation);
 598         COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
 599         READ64(locku->lu_offset);
 600         READ64(locku->lu_length);
 601
 602         DECODE_TAIL;
 603 }
 604
 605 static int
 606 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
 607 {
 608         DECODE_HEAD;
 609
 610         READ_BUF(4);
 611         READ32(lookup->lo_len);
 612         READ_BUF(lookup->lo_len);
 613         SAVEMEM(lookup->lo_name, lookup->lo_len);
 614         if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
 615                 return status;
 616
 617         DECODE_TAIL;
 618 }
 619
 620 static int
 621 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
 622 {
 623         DECODE_HEAD;
 624
 625         memset(open->op_bmval, 0, sizeof(open->op_bmval));
 626         open->op_iattr.ia_valid = 0;
 627         open->op_stateowner = NULL;
 628
 629         /* seqid, share_access, share_deny, clientid, ownerlen */
 630         READ_BUF(16 + sizeof(clientid_t));
 631         READ32(open->op_seqid);
 632         READ32(open->op_share_access);
 633         READ32(open->op_share_deny);
 634         COPYMEM(&open->op_clientid, sizeof(clientid_t));
 635         READ32(open->op_owner.len);
 636
 637         /* owner, open_flag */
 638         READ_BUF(open->op_owner.len + 4);
 639         SAVEMEM(open->op_owner.data, open->op_owner.len);
 640         READ32(open->op_create);
 641         switch (open->op_create) {
 642         case NFS4_OPEN_NOCREATE:
 643                 break;
 644         case NFS4_OPEN_CREATE:
 645                 READ_BUF(4);
 646                 READ32(open->op_createmode);
 647                 switch (open->op_createmode) {
 648                 case NFS4_CREATE_UNCHECKED:
 649                 case NFS4_CREATE_GUARDED:
 650                         if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
 651                                 goto out;
 652                         break;
 653                 case NFS4_CREATE_EXCLUSIVE:
 654                         READ_BUF(8);
 655                         COPYMEM(open->op_verf.data, 8);
 656                         break;
 657                 default:
 658                         goto xdr_error;
 659                 }
 660                 break;
 661         default:
 662                 goto xdr_error;
 663         }
 664
 665         /* open_claim */
 666         READ_BUF(4);
 667         READ32(open->op_claim_type);
 668         switch (open->op_claim_type) {
 669         case NFS4_OPEN_CLAIM_NULL:
 670         case NFS4_OPEN_CLAIM_DELEGATE_PREV:
 671                 READ_BUF(4);
 672                 READ32(open->op_fname.len);
 673                 READ_BUF(open->op_fname.len);
 674                 SAVEMEM(open->op_fname.data, open->op_fname.len);
 675                 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
 676                         return status;
 677                 break;
 678         case NFS4_OPEN_CLAIM_PREVIOUS:
 679                 READ_BUF(4);
 680                 READ32(open->op_delegate_type);
 681                 break;
 682         case NFS4_OPEN_CLAIM_DELEGATE_CUR:
 683                 READ_BUF(sizeof(stateid_t) + 4);
 684                 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
 685                 READ32(open->op_fname.len);
 686                 READ_BUF(open->op_fname.len);
 687                 SAVEMEM(open->op_fname.data, open->op_fname.len);
 688                 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
 689                         return status;
 690                 break;
 691         default:
 692                 goto xdr_error;
 693         }
 694
 695         DECODE_TAIL;
 696 }
 697
 698 static int
 699 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
 700 {
 701         DECODE_HEAD;
 702
 703         open_conf->oc_stateowner = NULL;
 704         READ_BUF(4 + sizeof(stateid_t));
 705         READ32(open_conf->oc_req_stateid.si_generation);
 706         COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
 707         READ32(open_conf->oc_seqid);
 708
 709         DECODE_TAIL;
 710 }
 711
 712 static int
 713 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
 714 {
 715         DECODE_HEAD;
 716
 717         open_down->od_stateowner = NULL;
 718         READ_BUF(12 + sizeof(stateid_t));
 719         READ32(open_down->od_stateid.si_generation);
 720         COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
 721         READ32(open_down->od_seqid);
 722         READ32(open_down->od_share_access);
 723         READ32(open_down->od_share_deny);
 724
 725         DECODE_TAIL;
 726 }
 727
 728 static int
 729 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
 730 {
 731         DECODE_HEAD;
 732
 733         READ_BUF(4);
 734         READ32(putfh->pf_fhlen);
 735         if (putfh->pf_fhlen > NFS4_FHSIZE)
 736                 goto xdr_error;
 737         READ_BUF(putfh->pf_fhlen);
 738         SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
 739
 740         DECODE_TAIL;
 741 }
 742
 743 static int
 744 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
 745 {
 746         DECODE_HEAD;
 747
 748         READ_BUF(sizeof(stateid_t) + 12);
 749         READ32(read->rd_stateid.si_generation);
 750         COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
 751         READ64(read->rd_offset);
 752         READ32(read->rd_length);
 753
 754         DECODE_TAIL;
 755 }
 756
 757 static int
 758 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
 759 {
 760         DECODE_HEAD;
 761
 762         READ_BUF(24);
 763         READ64(readdir->rd_cookie);
 764         COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
 765         READ32(readdir->rd_dircount);    /* just in case you needed a useless field... */
 766         READ32(readdir->rd_maxcount);
 767         if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
 768                 goto out;
 769
 770         DECODE_TAIL;
 771 }
 772
 773 static int
 774 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
 775 {
 776         DECODE_HEAD;
 777
 778         READ_BUF(4);
 779         READ32(remove->rm_namelen);
 780         READ_BUF(remove->rm_namelen);
 781         SAVEMEM(remove->rm_name, remove->rm_namelen);
 782         if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
 783                 return status;
 784
 785         DECODE_TAIL;
 786 }
 787
 788 static int
 789 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
 790 {
 791         DECODE_HEAD;
 792
 793         READ_BUF(4);
 794         READ32(rename->rn_snamelen);
 795         READ_BUF(rename->rn_snamelen + 4);
 796         SAVEMEM(rename->rn_sname, rename->rn_snamelen);
 797         READ32(rename->rn_tnamelen);
 798         READ_BUF(rename->rn_tnamelen);
 799         SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
 800         if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
 801                 return status;
 802         if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
 803                 return status;
 804
 805         DECODE_TAIL;
 806 }
 807
 808 static int
 809 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
 810 {
 811         DECODE_HEAD;
 812
 813         READ_BUF(sizeof(clientid_t));
 814         COPYMEM(clientid, sizeof(clientid_t));
 815
 816         DECODE_TAIL;
 817 }
 818
 819 static int
 820 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
 821 {
 822         DECODE_HEAD;
 823
 824         READ_BUF(sizeof(stateid_t));
 825         READ32(setattr->sa_stateid.si_generation);
 826         COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
 827         if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
 828                 goto out;
 829
 830         DECODE_TAIL;
 831 }
 832
 833 static int
 834 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
 835 {
 836         DECODE_HEAD;
 837
 838         READ_BUF(12);
 839         COPYMEM(setclientid->se_verf.data, 8);
 840         READ32(setclientid->se_namelen);
 841
 842         READ_BUF(setclientid->se_namelen + 8);
 843         SAVEMEM(setclientid->se_name, setclientid->se_namelen);
 844         READ32(setclientid->se_callback_prog);
 845         READ32(setclientid->se_callback_netid_len);
 846
 847         READ_BUF(setclientid->se_callback_netid_len + 4);
 848         SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
 849         READ32(setclientid->se_callback_addr_len);
 850
 851         READ_BUF(setclientid->se_callback_addr_len + 4);
 852         SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
 853         READ32(setclientid->se_callback_ident);
 854
 855         DECODE_TAIL;
 856 }
 857
 858 static int
 859 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
 860 {
 861         DECODE_HEAD;
 862
 863         READ_BUF(8 + sizeof(nfs4_verifier));
 864         COPYMEM(&scd_c->sc_clientid, 8);
 865         COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
 866
 867         DECODE_TAIL;
 868 }
 869
 870 /* Also used for NVERIFY */
 871 static int
 872 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
 873 {
 874 #if 0
 875         struct nfsd4_compoundargs save = {
 876                 .p = argp->p,
 877                 .end = argp->end,
 878                 .rqstp = argp->rqstp,
 879         };
 880         u32             ve_bmval[2];
 881         struct iattr    ve_iattr;           /* request */
 882         struct nfs4_acl *ve_acl;            /* request */
 883 #endif
 884         DECODE_HEAD;
 885
 886         if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
 887                 goto out;
 888
 889         /* For convenience's sake, we compare raw xdr'd attributes in
 890          * nfsd4_proc_verify; however we still decode here just to return
 891          * correct error in case of bad xdr. */
 892 #if 0
 893         status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
 894         if (status == nfserr_inval) {
 895                 status = nfserrno(status);
 896                 goto out;
 897         }
 898 #endif
 899         READ_BUF(4);
 900         READ32(verify->ve_attrlen);
 901         READ_BUF(verify->ve_attrlen);
 902         SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
 903
 904         DECODE_TAIL;
 905 }
 906
 907 static int
 908 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
 909 {
 910         int avail;
 911         int v;
 912         int len;
 913         DECODE_HEAD;
 914
 915         READ_BUF(sizeof(stateid_opaque_t) + 20);
 916         READ32(write->wr_stateid.si_generation);
 917         COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
 918         READ64(write->wr_offset);
 919         READ32(write->wr_stable_how);
 920         if (write->wr_stable_how > 2)
 921                 goto xdr_error;
 922         READ32(write->wr_buflen);
 923
 924         /* Sorry .. no magic macros for this.. *
 925          * READ_BUF(write->wr_buflen);
 926          * SAVEMEM(write->wr_buf, write->wr_buflen);
 927          */
 928         avail = (char*)argp->end - (char*)argp->p;
 929         if (avail + argp->pagelen < write->wr_buflen) {
 930                 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
 931                 goto xdr_error;
 932         }
 933         write->wr_vec[0].iov_base = p;
 934         write->wr_vec[0].iov_len = avail;
 935         v = 0;
 936         len = write->wr_buflen;
 937         while (len > write->wr_vec[v].iov_len) {
 938                 len -= write->wr_vec[v].iov_len;
 939                 v++;
 940                 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
 941                 argp->pagelist++;
 942                 if (argp->pagelen >= PAGE_SIZE) {
 943                         write->wr_vec[v].iov_len = PAGE_SIZE;
 944                         argp->pagelen -= PAGE_SIZE;
 945                 } else {
 946                         write->wr_vec[v].iov_len = argp->pagelen;
 947                         argp->pagelen -= len;
 948                 }
 949         }
 950         argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
 951         argp->p = (u32*)  (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
 952         write->wr_vec[v].iov_len = len;
 953         write->wr_vlen = v+1;
 954
 955         DECODE_TAIL;
 956 }
 957
 958 static int
 959 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
 960 {
 961         DECODE_HEAD;
 962
 963         READ_BUF(12);
 964         COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
 965         READ32(rlockowner->rl_owner.len);
 966         READ_BUF(rlockowner->rl_owner.len);
 967         READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
 968
 969         DECODE_TAIL;
 970 }
 971
 972 static int
 973 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 974 {
 975         DECODE_HEAD;
 976         struct nfsd4_op *op;
 977         int i;
 978
 979         /*
 980          * XXX: According to spec, we should check the tag
 981          * for UTF-8 compliance.  I'm postponing this for
 982          * now because it seems that some clients do use
 983          * binary tags.
 984          */
 985         READ_BUF(4);
 986         READ32(argp->taglen);
 987         READ_BUF(argp->taglen + 8);
 988         SAVEMEM(argp->tag, argp->taglen);
 989         READ32(argp->minorversion);
 990         READ32(argp->opcnt);
 991
 992         if (argp->taglen > NFSD4_MAX_TAGLEN)
 993                 goto xdr_error;
 994         if (argp->opcnt > 100)
 995                 goto xdr_error;
 996
 997         if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
 998                 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
 999                 if (!argp->ops) {
1000                         argp->ops = argp->iops;
1001                         printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1002                         goto xdr_error;
1003                 }
1004         }
1005
1006         for (i = 0; i < argp->opcnt; i++) {
1007                 op = &argp->ops[i];
1008                 op->replay = NULL;
1009
1010                 /*
1011                  * We can't use READ_BUF() here because we need to handle
1012                  * a missing opcode as an OP_WRITE + 1. So we need to check
1013                  * to see if we're truly at the end of our buffer or if there
1014                  * is another page we need to flip to.
1015                  */
1016
1017                 if (argp->p == argp->end) {
1018                         if (argp->pagelen < 4) {
1019                                 /* There isn't an opcode still on the wire */
1020                                 op->opnum = OP_WRITE + 1;
1021                                 op->status = nfserr_bad_xdr;
1022                                 argp->opcnt = i+1;
1023                                 break;
1024                         }
1025
1026                         /*
1027                          * False alarm. We just hit a page boundary, but there
1028                          * is still data available.  Move pointer across page
1029                          * boundary.  *snip from READ_BUF*
1030                          */
1031                         argp->p = page_address(argp->pagelist[0]);
1032                         argp->pagelist++;
1033                         if (argp->pagelen < PAGE_SIZE) {
1034                                 argp->end = p + (argp->pagelen>>2);
1035                                 argp->pagelen = 0;
1036                         } else {
1037                                 argp->end = p + (PAGE_SIZE>>2);
1038                                 argp->pagelen -= PAGE_SIZE;
1039                         }
1040                 }
1041                 op->opnum = ntohl(*argp->p++);
1042
1043                 switch (op->opnum) {
1044                 case 2: /* Reserved operation */
1045                         op->opnum = OP_ILLEGAL;
1046                         if (argp->minorversion == 0)
1047                                 op->status = nfserr_op_illegal;
1048                         else
1049                                 op->status = nfserr_minor_vers_mismatch;
1050                         break;
1051                 case OP_ACCESS:
1052                         op->status = nfsd4_decode_access(argp, &op->u.access);
1053                         break;
1054                 case OP_CLOSE:
1055                         op->status = nfsd4_decode_close(argp, &op->u.close);
1056                         break;
1057                 case OP_COMMIT:
1058                         op->status = nfsd4_decode_commit(argp, &op->u.commit);
1059                         break;
1060                 case OP_CREATE:
1061                         op->status = nfsd4_decode_create(argp, &op->u.create);
1062                         break;
1063                 case OP_DELEGRETURN:
1064                         op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1065                         break;
1066                 case OP_GETATTR:
1067                         op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1068                         break;
1069                 case OP_GETFH:
1070                         op->status = nfs_ok;
1071                         break;
1072                 case OP_LINK:
1073                         op->status = nfsd4_decode_link(argp, &op->u.link);
1074                         break;
1075                 case OP_LOCK:
1076                         op->status = nfsd4_decode_lock(argp, &op->u.lock);
1077                         break;
1078                 case OP_LOCKT:
1079                         op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1080                         break;
1081                 case OP_LOCKU:
1082                         op->status = nfsd4_decode_locku(argp, &op->u.locku);
1083                         break;
1084                 case OP_LOOKUP:
1085                         op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1086                         break;
1087                 case OP_LOOKUPP:
1088                         op->status = nfs_ok;
1089                         break;
1090                 case OP_NVERIFY:
1091                         op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1092                         break;
1093                 case OP_OPEN:
1094                         op->status = nfsd4_decode_open(argp, &op->u.open);
1095                         break;
1096                 case OP_OPEN_CONFIRM:
1097                         op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1098                         break;
1099                 case OP_OPEN_DOWNGRADE:
1100                         op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1101                         break;
1102                 case OP_PUTFH:
1103                         op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1104                         break;
1105                 case OP_PUTROOTFH:
1106                         op->status = nfs_ok;
1107                         break;
1108                 case OP_READ:
1109                         op->status = nfsd4_decode_read(argp, &op->u.read);
1110                         break;
1111                 case OP_READDIR:
1112                         op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1113                         break;
1114                 case OP_READLINK:
1115                         op->status = nfs_ok;
1116                         break;
1117                 case OP_REMOVE:
1118                         op->status = nfsd4_decode_remove(argp, &op->u.remove);
1119                         break;
1120                 case OP_RENAME:
1121                         op->status = nfsd4_decode_rename(argp, &op->u.rename);
1122                         break;
1123                 case OP_RESTOREFH:
1124                         op->status = nfs_ok;
1125                         break;
1126                 case OP_RENEW:
1127                         op->status = nfsd4_decode_renew(argp, &op->u.renew);
1128                         break;
1129                 case OP_SAVEFH:
1130                         op->status = nfs_ok;
1131                         break;
1132                 case OP_SETATTR:
1133                         op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1134                         break;
1135                 case OP_SETCLIENTID:
1136                         op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1137                         break;
1138                 case OP_SETCLIENTID_CONFIRM:
1139                         op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1140                         break;
1141                 case OP_VERIFY:
1142                         op->status = nfsd4_decode_verify(argp, &op->u.verify);
1143                         break;
1144                 case OP_WRITE:
1145                         op->status = nfsd4_decode_write(argp, &op->u.write);
1146                         break;
1147                 case OP_RELEASE_LOCKOWNER:
1148                         op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1149                         break;
1150                 default:
1151                         op->opnum = OP_ILLEGAL;
1152                         op->status = nfserr_op_illegal;
1153                         break;
1154                 }
1155
1156                 if (op->status) {
1157                         argp->opcnt = i+1;
1158                         break;
1159                 }
1160         }
1161
1162         DECODE_TAIL;
1163 }
1164 /*
1165  * END OF "GENERIC" DECODE ROUTINES.
1166  */
1167
1168 /*
1169  * START OF "GENERIC" ENCODE ROUTINES.
1170  *   These may look a little ugly since they are imported from a "generic"
1171  * set of XDR encode/decode routines which are intended to be shared by
1172  * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1173  *
1174  * If the pain of reading these is too great, it should be a straightforward
1175  * task to translate them into Linux-specific versions which are more
1176  * consistent with the style used in NFSv2/v3...
1177  */
1178 #define ENCODE_HEAD              u32 *p
1179
1180 #define WRITE32(n)               *p++ = htonl(n)
1181 #define WRITE64(n)               do {                           \
1182         *p++ = htonl((u32)((n) >> 32));                         \
1183         *p++ = htonl((u32)(n));                                 \
1184 } while (0)
1185 #define WRITEMEM(ptr,nbytes)     do {                           \
1186         *(p + XDR_QUADLEN(nbytes) -1) = 0;                      \
1187         memcpy(p, ptr, nbytes);                                 \
1188         p += XDR_QUADLEN(nbytes);                               \
1189 } while (0)
1190 #define WRITECINFO(c)           do {                            \
1191         *p++ = htonl(c.atomic);                                 \
1192         *p++ = htonl(c.before_ctime_sec);                               \
1193         *p++ = htonl(c.before_ctime_nsec);                              \
1194         *p++ = htonl(c.after_ctime_sec);                                \
1195         *p++ = htonl(c.after_ctime_nsec);                               \
1196 } while (0)
1197
1198 #define RESERVE_SPACE(nbytes)   do {                            \
1199         p = resp->p;                                            \
1200         BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end);            \
1201 } while (0)
1202 #define ADJUST_ARGS()           resp->p = p
1203
1204 /*
1205  * Header routine to setup seqid operation replay cache
1206  */
1207 #define ENCODE_SEQID_OP_HEAD                                    \
1208         u32 *p;                                                 \
1209         u32 *save;                                              \
1210                                                                 \
1211         save = resp->p;
1212
1213 /*
1214  * Routine for encoding the result of a
1215  * "seqid-mutating" NFSv4 operation.  This is
1216  * where seqids are incremented, and the
1217  * replay cache is filled.
1218  */
1219
1220 #define ENCODE_SEQID_OP_TAIL(stateowner) do {                   \
1221         if (seqid_mutating_err(nfserr) && stateowner) {         \
1222                 if (stateowner->so_confirmed)                   \
1223                         stateowner->so_seqid++;                 \
1224                 stateowner->so_replay.rp_status = nfserr;       \
1225                 stateowner->so_replay.rp_buflen =               \
1226                           (((char *)(resp)->p - (char *)save)); \
1227                 memcpy(stateowner->so_replay.rp_buf, save,      \
1228                         stateowner->so_replay.rp_buflen);       \
1229         } } while (0);
1230
1231
1232 static u32 nfs4_ftypes[16] = {
1233         NF4BAD,  NF4FIFO, NF4CHR, NF4BAD,
1234         NF4DIR,  NF4BAD,  NF4BLK, NF4BAD,
1235         NF4REG,  NF4BAD,  NF4LNK, NF4BAD,
1236         NF4SOCK, NF4BAD,  NF4LNK, NF4BAD,
1237 };
1238
1239 static int
1240 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1241                         u32 **p, int *buflen)
1242 {
1243         int status;
1244
1245         if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1246                 return nfserr_resource;
1247         if (whotype != NFS4_ACL_WHO_NAMED)
1248                 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1249         else if (group)
1250                 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1251         else
1252                 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1253         if (status < 0)
1254                 return nfserrno(status);
1255         *p = xdr_encode_opaque(*p, NULL, status);
1256         *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1257         BUG_ON(*buflen < 0);
1258         return 0;
1259 }
1260
1261 static inline int
1262 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1263 {
1264         return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1265 }
1266
1267 static inline int
1268 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1269 {
1270         return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1271 }
1272
1273 static inline int
1274 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1275                 u32 **p, int *buflen)
1276 {
1277         return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1278 }
1279
1280
1281 /*
1282  * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1283  * ourselves.
1284  *
1285  * @countp is the buffer size in _words_; upon successful return this becomes
1286  * replaced with the number of words written.
1287  */
1288 int
1289 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1290                 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1291                 struct svc_rqst *rqstp)
1292 {
1293         u32 bmval0 = bmval[0];
1294         u32 bmval1 = bmval[1];
1295         struct kstat stat;
1296         struct svc_fh tempfh;
1297         struct kstatfs statfs;
1298         int buflen = *countp << 2;
1299         u32 *attrlenp;
1300         u32 dummy;
1301         u64 dummy64;
1302         u32 *p = buffer;
1303         int status;
1304         int aclsupport = 0;
1305         struct nfs4_acl *acl = NULL;
1306
1307         BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1308         BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1309         BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1310
1311         status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1312         if (status)
1313                 goto out_nfserr;
1314         if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1315             (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1316                        FATTR4_WORD1_SPACE_TOTAL))) {
1317                 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1318                 if (status)
1319                         goto out_nfserr;
1320         }
1321         if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1322                 fh_init(&tempfh, NFS4_FHSIZE);
1323                 status = fh_compose(&tempfh, exp, dentry, NULL);
1324                 if (status)
1325                         goto out;
1326                 fhp = &tempfh;
1327         }
1328         if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1329                         | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1330                 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1331                 aclsupport = (status == 0);
1332                 if (bmval0 & FATTR4_WORD0_ACL) {
1333                         if (status == -EOPNOTSUPP)
1334                                 bmval0 &= ~FATTR4_WORD0_ACL;
1335                         else if (status == -EINVAL) {
1336                                 status = nfserr_attrnotsupp;
1337                                 goto out;
1338                         } else if (status != 0)
1339                                 goto out_nfserr;
1340                 }
1341         }
1342         if ((buflen -= 16) < 0)
1343                 goto out_resource;
1344
1345         WRITE32(2);
1346         WRITE32(bmval0);
1347         WRITE32(bmval1);
1348         attrlenp = p++;                /* to be backfilled later */
1349
1350         if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1351                 if ((buflen -= 12) < 0)
1352                         goto out_resource;
1353                 WRITE32(2);
1354                 WRITE32(aclsupport ?
1355                         NFSD_SUPPORTED_ATTRS_WORD0 :
1356                         NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1357                 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1358         }
1359         if (bmval0 & FATTR4_WORD0_TYPE) {
1360                 if ((buflen -= 4) < 0)
1361                         goto out_resource;
1362                 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1363                 if (dummy == NF4BAD)
1364                         goto out_serverfault;
1365                 WRITE32(dummy);
1366         }
1367         if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1368                 if ((buflen -= 4) < 0)
1369                         goto out_resource;
1370                 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1371         }
1372         if (bmval0 & FATTR4_WORD0_CHANGE) {
1373                 /*
1374                  * Note: This _must_ be consistent with the scheme for writing
1375                  * change_info, so any changes made here must be reflected there
1376                  * as well.  (See xdr4.h:set_change_info() and the WRITECINFO()
1377                  * macro above.)
1378                  */
1379                 if ((buflen -= 8) < 0)
1380                         goto out_resource;
1381                 WRITE32(stat.ctime.tv_sec);
1382                 WRITE32(stat.ctime.tv_nsec);
1383         }
1384         if (bmval0 & FATTR4_WORD0_SIZE) {
1385                 if ((buflen -= 8) < 0)
1386                         goto out_resource;
1387                 WRITE64(stat.size);
1388         }
1389         if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1390                 if ((buflen -= 4) < 0)
1391                         goto out_resource;
1392                 WRITE32(1);
1393         }
1394         if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1395                 if ((buflen -= 4) < 0)
1396                         goto out_resource;
1397                 WRITE32(1);
1398         }
1399         if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1400                 if ((buflen -= 4) < 0)
1401                         goto out_resource;
1402                 WRITE32(0);
1403         }
1404         if (bmval0 & FATTR4_WORD0_FSID) {
1405                 if ((buflen -= 16) < 0)
1406                         goto out_resource;
1407                 if (is_fsid(fhp, rqstp->rq_reffh)) {
1408                         WRITE64((u64)exp->ex_fsid);
1409                         WRITE64((u64)0);
1410                 } else {
1411                         WRITE32(0);
1412                         WRITE32(MAJOR(stat.dev));
1413                         WRITE32(0);
1414                         WRITE32(MINOR(stat.dev));
1415                 }
1416         }
1417         if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1418                 if ((buflen -= 4) < 0)
1419                         goto out_resource;
1420                 WRITE32(0);
1421         }
1422         if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1423                 if ((buflen -= 4) < 0)
1424                         goto out_resource;
1425                 WRITE32(NFSD_LEASE_TIME);
1426         }
1427         if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1428                 if ((buflen -= 4) < 0)
1429                         goto out_resource;
1430                 WRITE32(0);
1431         }
1432         if (bmval0 & FATTR4_WORD0_ACL) {
1433                 struct nfs4_ace *ace;
1434                 struct list_head *h;
1435
1436                 if (acl == NULL) {
1437                         if ((buflen -= 4) < 0)
1438                                 goto out_resource;
1439
1440                         WRITE32(0);
1441                         goto out_acl;
1442                 }
1443                 if ((buflen -= 4) < 0)
1444                         goto out_resource;
1445                 WRITE32(acl->naces);
1446
1447                 list_for_each(h, &acl->ace_head) {
1448                         ace = list_entry(h, struct nfs4_ace, l_ace);
1449
1450                         if ((buflen -= 4*3) < 0)
1451                                 goto out_resource;
1452                         WRITE32(ace->type);
1453                         WRITE32(ace->flag);
1454                         WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1455                         status = nfsd4_encode_aclname(rqstp, ace->whotype,
1456                                 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1457                                 &p, &buflen);
1458                         if (status == nfserr_resource)
1459                                 goto out_resource;
1460                         if (status)
1461                                 goto out;
1462                 }
1463         }
1464 out_acl:
1465         if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1466                 if ((buflen -= 4) < 0)
1467                         goto out_resource;
1468                 WRITE32(aclsupport ?
1469                         ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1470         }
1471         if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1472                 if ((buflen -= 4) < 0)
1473                         goto out_resource;
1474                 WRITE32(1);
1475         }
1476         if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1477                 if ((buflen -= 4) < 0)
1478                         goto out_resource;
1479                 WRITE32(1);
1480         }
1481         if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1482                 if ((buflen -= 4) < 0)
1483                         goto out_resource;
1484                 WRITE32(1);
1485         }
1486         if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1487                 if ((buflen -= 4) < 0)
1488                         goto out_resource;
1489                 WRITE32(1);
1490         }
1491         if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1492                 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1493                 if (buflen < 0)
1494                         goto out_resource;
1495                 WRITE32(fhp->fh_handle.fh_size);
1496                 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1497         }
1498         if (bmval0 & FATTR4_WORD0_FILEID) {
1499                 if ((buflen -= 8) < 0)
1500                         goto out_resource;
1501                 WRITE64((u64) stat.ino);
1502         }
1503         if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1504                 if ((buflen -= 8) < 0)
1505                         goto out_resource;
1506                 WRITE64((u64) statfs.f_ffree);
1507         }
1508         if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1509                 if ((buflen -= 8) < 0)
1510                         goto out_resource;
1511                 WRITE64((u64) statfs.f_ffree);
1512         }
1513         if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1514                 if ((buflen -= 8) < 0)
1515                         goto out_resource;
1516                 WRITE64((u64) statfs.f_files);
1517         }
1518         if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1519                 if ((buflen -= 4) < 0)
1520                         goto out_resource;
1521                 WRITE32(1);
1522         }
1523         if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1524                 if ((buflen -= 8) < 0)
1525                         goto out_resource;
1526                 WRITE64(~(u64)0);
1527         }
1528         if (bmval0 & FATTR4_WORD0_MAXLINK) {
1529                 if ((buflen -= 4) < 0)
1530                         goto out_resource;
1531                 WRITE32(255);
1532         }
1533         if (bmval0 & FATTR4_WORD0_MAXNAME) {
1534                 if ((buflen -= 4) < 0)
1535                         goto out_resource;
1536                 WRITE32(~(u32) 0);
1537         }
1538         if (bmval0 & FATTR4_WORD0_MAXREAD) {
1539                 if ((buflen -= 8) < 0)
1540                         goto out_resource;
1541                 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1542         }
1543         if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1544                 if ((buflen -= 8) < 0)
1545                         goto out_resource;
1546                 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1547         }
1548         if (bmval1 & FATTR4_WORD1_MODE) {
1549                 if ((buflen -= 4) < 0)
1550                         goto out_resource;
1551                 WRITE32(stat.mode & S_IALLUGO);
1552         }
1553         if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1554                 if ((buflen -= 4) < 0)
1555                         goto out_resource;
1556                 WRITE32(1);
1557         }
1558         if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1559                 if ((buflen -= 4) < 0)
1560                         goto out_resource;
1561                 WRITE32(stat.nlink);
1562         }
1563         if (bmval1 & FATTR4_WORD1_OWNER) {
1564                 status = nfsd4_encode_user(rqstp,
1565                         XIDINO_UID(XID_TAG(dentry->d_inode),
1566                         stat.uid, stat.xid), &p, &buflen);
1567                 if (status == nfserr_resource)
1568                         goto out_resource;
1569                 if (status)
1570                         goto out;
1571         }
1572         if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1573                 status = nfsd4_encode_group(rqstp,
1574                         XIDINO_GID(XID_TAG(dentry->d_inode),
1575                         stat.gid, stat.xid), &p, &buflen);
1576                 if (status == nfserr_resource)
1577                         goto out_resource;
1578                 if (status)
1579                         goto out;
1580         }
1581         if (bmval1 & FATTR4_WORD1_RAWDEV) {
1582                 if ((buflen -= 8) < 0)
1583                         goto out_resource;
1584                 WRITE32((u32) MAJOR(stat.rdev));
1585                 WRITE32((u32) MINOR(stat.rdev));
1586         }
1587         if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1588                 if ((buflen -= 8) < 0)
1589                         goto out_resource;
1590                 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1591                 WRITE64(dummy64);
1592         }
1593         if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1594                 if ((buflen -= 8) < 0)
1595                         goto out_resource;
1596                 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1597                 WRITE64(dummy64);
1598         }
1599         if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1600                 if ((buflen -= 8) < 0)
1601                         goto out_resource;
1602                 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1603                 WRITE64(dummy64);
1604         }
1605         if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1606                 if ((buflen -= 8) < 0)
1607                         goto out_resource;
1608                 dummy64 = (u64)stat.blocks << 9;
1609                 WRITE64(dummy64);
1610         }
1611         if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1612                 if ((buflen -= 12) < 0)
1613                         goto out_resource;
1614                 WRITE32(0);
1615                 WRITE32(stat.atime.tv_sec);
1616                 WRITE32(stat.atime.tv_nsec);
1617         }
1618         if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1619                 if ((buflen -= 12) < 0)
1620                         goto out_resource;
1621                 WRITE32(0);
1622                 WRITE32(1);
1623                 WRITE32(0);
1624         }
1625         if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1626                 if ((buflen -= 12) < 0)
1627                         goto out_resource;
1628                 WRITE32(0);
1629                 WRITE32(stat.ctime.tv_sec);
1630                 WRITE32(stat.ctime.tv_nsec);
1631         }
1632         if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1633                 if ((buflen -= 12) < 0)
1634                         goto out_resource;
1635                 WRITE32(0);
1636                 WRITE32(stat.mtime.tv_sec);
1637                 WRITE32(stat.mtime.tv_nsec);
1638         }
1639         if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1640                 struct dentry *mnt_pnt, *mnt_root;
1641
1642                 if ((buflen -= 8) < 0)
1643                         goto out_resource;
1644                 mnt_root = exp->ex_mnt->mnt_root;
1645                 if (mnt_root->d_inode == dentry->d_inode) {
1646                         mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1647                         WRITE64((u64) mnt_pnt->d_inode->i_ino);
1648                 } else
1649                         WRITE64((u64) stat.ino);
1650         }
1651         *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1652         *countp = p - buffer;
1653         status = nfs_ok;
1654
1655 out:
1656         nfs4_acl_free(acl);
1657         if (fhp == &tempfh)
1658                 fh_put(&tempfh);
1659         return status;
1660 out_nfserr:
1661         status = nfserrno(status);
1662         goto out;
1663 out_resource:
1664         *countp = 0;
1665         status = nfserr_resource;
1666         goto out;
1667 out_serverfault:
1668         status = nfserr_serverfault;
1669         goto out;
1670 }
1671
1672 static int
1673 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1674                 const char *name, int namlen, u32 *p, int *buflen)
1675 {
1676         struct svc_export *exp = cd->rd_fhp->fh_export;
1677         struct dentry *dentry;
1678         int nfserr;
1679
1680         dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1681         if (IS_ERR(dentry))
1682                 return nfserrno(PTR_ERR(dentry));
1683
1684         exp_get(exp);
1685         if (d_mountpoint(dentry)) {
1686                 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1687                 /*
1688                  * -EAGAIN is the only error returned from
1689                  * nfsd_cross_mnt() and it indicates that an
1690                  * up-call has  been initiated to fill in the export
1691                  * options on exp.  When the answer comes back,
1692                  * this call will be retried.
1693                  */
1694                         nfserr = nfserr_dropit;
1695                         goto out_put;
1696                 }
1697
1698         }
1699         nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1700                                         cd->rd_rqstp);
1701 out_put:
1702         dput(dentry);
1703         exp_put(exp);
1704         return nfserr;
1705 }
1706
1707 static u32 *
1708 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1709 {
1710         u32 *attrlenp;
1711
1712         if (buflen < 6)
1713                 return NULL;
1714         *p++ = htonl(2);
1715         *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1716         *p++ = htonl(0);                         /* bmval1 */
1717
1718         attrlenp = p++;
1719         *p++ = nfserr;       /* no htonl */
1720         *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1721         return p;
1722 }
1723
1724 static int
1725 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1726                     loff_t offset, ino_t ino, unsigned int d_type)
1727 {
1728         struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1729         int buflen;
1730         u32 *p = cd->buffer;
1731         int nfserr = nfserr_toosmall;
1732
1733         /* In nfsv4, "." and ".." never make it onto the wire.. */
1734         if (name && isdotent(name, namlen)) {
1735                 cd->common.err = nfs_ok;
1736                 return 0;
1737         }
1738
1739         if (cd->offset)
1740                 xdr_encode_hyper(cd->offset, (u64) offset);
1741
1742         buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1743         if (buflen < 0)
1744                 goto fail;
1745
1746         *p++ = xdr_one;                             /* mark entry present */
1747         cd->offset = p;                             /* remember pointer */
1748         p = xdr_encode_hyper(p, NFS_OFFSET_MAX);    /* offset of next entry */
1749         p = xdr_encode_array(p, name, namlen);      /* name length & name */
1750
1751         nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1752         switch (nfserr) {
1753         case nfs_ok:
1754                 p += buflen;
1755                 break;
1756         case nfserr_resource:
1757                 nfserr = nfserr_toosmall;
1758                 goto fail;
1759         case nfserr_dropit:
1760                 goto fail;
1761         default:
1762                 /*
1763                  * If the client requested the RDATTR_ERROR attribute,
1764                  * we stuff the error code into this attribute
1765                  * and continue.  If this attribute was not requested,
1766                  * then in accordance with the spec, we fail the
1767                  * entire READDIR operation(!)
1768                  */
1769                 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1770                         goto fail;
1771                 nfserr = nfserr_toosmall;
1772                 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1773                 if (p == NULL)
1774                         goto fail;
1775         }
1776         cd->buflen -= (p - cd->buffer);
1777         cd->buffer = p;
1778         cd->common.err = nfs_ok;
1779         return 0;
1780 fail:
1781         cd->common.err = nfserr;
1782         return -EINVAL;
1783 }
1784
1785 static void
1786 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1787 {
1788         ENCODE_HEAD;
1789
1790         if (!nfserr) {
1791                 RESERVE_SPACE(8);
1792                 WRITE32(access->ac_supported);
1793                 WRITE32(access->ac_resp_access);
1794                 ADJUST_ARGS();
1795         }
1796 }
1797
1798 static void
1799 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1800 {
1801         ENCODE_SEQID_OP_HEAD;
1802
1803         if (!nfserr) {
1804                 RESERVE_SPACE(sizeof(stateid_t));
1805                 WRITE32(close->cl_stateid.si_generation);
1806                 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1807                 ADJUST_ARGS();
1808         }
1809         ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1810 }
1811
1812
1813 static void
1814 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1815 {
1816         ENCODE_HEAD;
1817
1818         if (!nfserr) {
1819                 RESERVE_SPACE(8);
1820                 WRITEMEM(commit->co_verf.data, 8);
1821                 ADJUST_ARGS();
1822         }
1823 }
1824
1825 static void
1826 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1827 {
1828         ENCODE_HEAD;
1829
1830         if (!nfserr) {
1831                 RESERVE_SPACE(32);
1832                 WRITECINFO(create->cr_cinfo);
1833                 WRITE32(2);
1834                 WRITE32(create->cr_bmval[0]);
1835                 WRITE32(create->cr_bmval[1]);
1836                 ADJUST_ARGS();
1837         }
1838 }
1839
1840 static int
1841 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1842 {
1843         struct svc_fh *fhp = getattr->ga_fhp;
1844         int buflen;
1845
1846         if (nfserr)
1847                 return nfserr;
1848
1849         buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1850         nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1851                                     resp->p, &buflen, getattr->ga_bmval,
1852                                     resp->rqstp);
1853
1854         if (!nfserr)
1855                 resp->p += buflen;
1856         return nfserr;
1857 }
1858
1859 static void
1860 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1861 {
1862         unsigned int len;
1863         ENCODE_HEAD;
1864
1865         if (!nfserr) {
1866                 len = fhp->fh_handle.fh_size;
1867                 RESERVE_SPACE(len + 4);
1868                 WRITE32(len);
1869                 WRITEMEM(&fhp->fh_handle.fh_base, len);
1870                 ADJUST_ARGS();
1871         }
1872 }
1873
1874 /*
1875 * Including all fields other than the name, a LOCK4denied structure requires
1876 *   8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1877 */
1878 static void
1879 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1880 {
1881         ENCODE_HEAD;
1882
1883         RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1884         WRITE64(ld->ld_start);
1885         WRITE64(ld->ld_length);
1886         WRITE32(ld->ld_type);
1887         if (ld->ld_sop) {
1888                 WRITEMEM(&ld->ld_clientid, 8);
1889                 WRITE32(ld->ld_sop->so_owner.len);
1890                 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1891                 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1892         }  else {  /* non - nfsv4 lock in conflict, no clientid nor owner */
1893                 WRITE64((u64)0); /* clientid */
1894                 WRITE32(0); /* length of owner name */
1895         }
1896         ADJUST_ARGS();
1897 }
1898
1899 static void
1900 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1901 {
1902
1903         ENCODE_SEQID_OP_HEAD;
1904
1905         if (!nfserr) {
1906                 RESERVE_SPACE(4 + sizeof(stateid_t));
1907                 WRITE32(lock->lk_resp_stateid.si_generation);
1908                 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1909                 ADJUST_ARGS();
1910         } else if (nfserr == nfserr_denied)
1911                 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1912
1913         ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
1914 }
1915
1916 static void
1917 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1918 {
1919         if (nfserr == nfserr_denied)
1920                 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1921 }
1922
1923 static void
1924 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1925 {
1926         ENCODE_SEQID_OP_HEAD;
1927
1928         if (!nfserr) {
1929                 RESERVE_SPACE(sizeof(stateid_t));
1930                 WRITE32(locku->lu_stateid.si_generation);
1931                 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1932                 ADJUST_ARGS();
1933         }
1934
1935         ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1936 }
1937
1938
1939 static void
1940 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1941 {
1942         ENCODE_HEAD;
1943
1944         if (!nfserr) {
1945                 RESERVE_SPACE(20);
1946                 WRITECINFO(link->li_cinfo);
1947                 ADJUST_ARGS();
1948         }
1949 }
1950
1951
1952 static void
1953 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1954 {
1955         ENCODE_SEQID_OP_HEAD;
1956
1957         if (nfserr)
1958                 goto out;
1959
1960         RESERVE_SPACE(36 + sizeof(stateid_t));
1961         WRITE32(open->op_stateid.si_generation);
1962         WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1963         WRITECINFO(open->op_cinfo);
1964         WRITE32(open->op_rflags);
1965         WRITE32(2);
1966         WRITE32(open->op_bmval[0]);
1967         WRITE32(open->op_bmval[1]);
1968         WRITE32(open->op_delegate_type);
1969         ADJUST_ARGS();
1970
1971         switch (open->op_delegate_type) {
1972         case NFS4_OPEN_DELEGATE_NONE:
1973                 break;
1974         case NFS4_OPEN_DELEGATE_READ:
1975                 RESERVE_SPACE(20 + sizeof(stateid_t));
1976                 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1977                 WRITE32(0);
1978
1979                 /*
1980                  * TODO: ACE's in delegations
1981                  */
1982                 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1983                 WRITE32(0);
1984                 WRITE32(0);
1985                 WRITE32(0);   /* XXX: is NULL principal ok? */
1986                 ADJUST_ARGS();
1987                 break;
1988         case NFS4_OPEN_DELEGATE_WRITE:
1989                 RESERVE_SPACE(32 + sizeof(stateid_t));
1990                 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1991                 WRITE32(0);
1992
1993                 /*
1994                  * TODO: space_limit's in delegations
1995                  */
1996                 WRITE32(NFS4_LIMIT_SIZE);
1997                 WRITE32(~(u32)0);
1998                 WRITE32(~(u32)0);
1999
2000                 /*
2001                  * TODO: ACE's in delegations
2002                  */
2003                 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2004                 WRITE32(0);
2005                 WRITE32(0);
2006                 WRITE32(0);   /* XXX: is NULL principal ok? */
2007                 ADJUST_ARGS();
2008                 break;
2009         default:
2010                 BUG();
2011         }
2012         /* XXX save filehandle here */
2013 out:
2014         ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2015 }
2016
2017 static void
2018 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2019 {
2020         ENCODE_SEQID_OP_HEAD;
2021
2022         if (!nfserr) {
2023                 RESERVE_SPACE(sizeof(stateid_t));
2024                 WRITE32(oc->oc_resp_stateid.si_generation);
2025                 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2026                 ADJUST_ARGS();
2027         }
2028
2029         ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2030 }
2031
2032 static void
2033 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2034 {
2035         ENCODE_SEQID_OP_HEAD;
2036
2037         if (!nfserr) {
2038                 RESERVE_SPACE(sizeof(stateid_t));
2039                 WRITE32(od->od_stateid.si_generation);
2040                 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2041                 ADJUST_ARGS();
2042         }
2043
2044         ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2045 }
2046
2047 static int
2048 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2049 {
2050         u32 eof;
2051         int v, pn;
2052         unsigned long maxcount;
2053         long len;
2054         ENCODE_HEAD;
2055
2056         if (nfserr)
2057                 return nfserr;
2058         if (resp->xbuf->page_len)
2059                 return nfserr_resource;
2060
2061         RESERVE_SPACE(8); /* eof flag and byte count */
2062
2063         maxcount = NFSSVC_MAXBLKSIZE;
2064         if (maxcount > read->rd_length)
2065                 maxcount = read->rd_length;
2066
2067         len = maxcount;
2068         v = 0;
2069         while (len > 0) {
2070                 pn = resp->rqstp->rq_resused;
2071                 svc_take_page(resp->rqstp);
2072                 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2073                 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2074                 v++;
2075                 len -= PAGE_SIZE;
2076         }
2077         read->rd_vlen = v;
2078
2079         nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2080                         read->rd_offset, read->rd_iov, read->rd_vlen,
2081                         &maxcount);
2082
2083         if (nfserr == nfserr_symlink)
2084                 nfserr = nfserr_inval;
2085         if (nfserr)
2086                 return nfserr;
2087         eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2088
2089         WRITE32(eof);
2090         WRITE32(maxcount);
2091         ADJUST_ARGS();
2092         resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2093
2094         resp->xbuf->page_len = maxcount;
2095
2096         /* read zero bytes -> don't set up tail */
2097         if(!maxcount)
2098                 return 0;
2099
2100         /* set up page for remaining responses */
2101         svc_take_page(resp->rqstp);
2102         resp->xbuf->tail[0].iov_base =
2103                 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2104         resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2105         resp->xbuf->tail[0].iov_len = 0;
2106         resp->p = resp->xbuf->tail[0].iov_base;
2107         resp->end = resp->p + PAGE_SIZE/4;
2108
2109         if (maxcount&3) {
2110                 *(resp->p)++ = 0;
2111                 resp->xbuf->tail[0].iov_base += maxcount&3;
2112                 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2113         }
2114         return 0;
2115 }
2116
2117 static int
2118 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2119 {
2120         int maxcount;
2121         char *page;
2122         ENCODE_HEAD;
2123
2124         if (nfserr)
2125                 return nfserr;
2126         if (resp->xbuf->page_len)
2127                 return nfserr_resource;
2128
2129         svc_take_page(resp->rqstp);
2130         page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2131
2132         maxcount = PAGE_SIZE;
2133         RESERVE_SPACE(4);
2134
2135         /*
2136          * XXX: By default, the ->readlink() VFS op will truncate symlinks
2137          * if they would overflow the buffer.  Is this kosher in NFSv4?  If
2138          * not, one easy fix is: if ->readlink() precisely fills the buffer,
2139          * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2140          */
2141         nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2142         if (nfserr == nfserr_isdir)
2143                 return nfserr_inval;
2144         if (nfserr)
2145                 return nfserr;
2146
2147         WRITE32(maxcount);
2148         ADJUST_ARGS();
2149         resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2150
2151         svc_take_page(resp->rqstp);
2152         resp->xbuf->tail[0].iov_base =
2153                 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2154         resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2155         resp->xbuf->tail[0].iov_len = 0;
2156         resp->p = resp->xbuf->tail[0].iov_base;
2157         resp->end = resp->p + PAGE_SIZE/4;
2158
2159         resp->xbuf->page_len = maxcount;
2160         if (maxcount&3) {
2161                 *(resp->p)++ = 0;
2162                 resp->xbuf->tail[0].iov_base += maxcount&3;
2163                 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2164         }
2165         return 0;
2166 }
2167
2168 static int
2169 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2170 {
2171         int maxcount;
2172         loff_t offset;
2173         u32 *page, *savep;
2174         ENCODE_HEAD;
2175
2176         if (nfserr)
2177                 return nfserr;
2178         if (resp->xbuf->page_len)
2179                 return nfserr_resource;
2180
2181         RESERVE_SPACE(8);  /* verifier */
2182         savep = p;
2183
2184         /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2185         WRITE32(0);
2186         WRITE32(0);
2187         ADJUST_ARGS();
2188         resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2189
2190         maxcount = PAGE_SIZE;
2191         if (maxcount > readdir->rd_maxcount)
2192                 maxcount = readdir->rd_maxcount;
2193
2194         /*
2195          * Convert from bytes to words, account for the two words already
2196          * written, make sure to leave two words at the end for the next
2197          * pointer and eof field.
2198          */
2199         maxcount = (maxcount >> 2) - 4;
2200         if (maxcount < 0) {
2201                 nfserr =  nfserr_toosmall;
2202                 goto err_no_verf;
2203         }
2204
2205         svc_take_page(resp->rqstp);
2206         page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2207         readdir->common.err = 0;
2208         readdir->buflen = maxcount;
2209         readdir->buffer = page;
2210         readdir->offset = NULL;
2211
2212         offset = readdir->rd_cookie;
2213         nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2214                               &offset,
2215                               &readdir->common, nfsd4_encode_dirent);
2216         if (nfserr == nfs_ok &&
2217             readdir->common.err == nfserr_toosmall &&
2218             readdir->buffer == page)
2219                 nfserr = nfserr_toosmall;
2220         if (nfserr == nfserr_symlink)
2221                 nfserr = nfserr_notdir;
2222         if (nfserr)
2223                 goto err_no_verf;
2224
2225         if (readdir->offset)
2226                 xdr_encode_hyper(readdir->offset, offset);
2227
2228         p = readdir->buffer;
2229         *p++ = 0;       /* no more entries */
2230         *p++ = htonl(readdir->common.err == nfserr_eof);
2231         resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2232
2233         /* allocate a page for the tail */
2234         svc_take_page(resp->rqstp);
2235         resp->xbuf->tail[0].iov_base =
2236                 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2237         resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2238         resp->xbuf->tail[0].iov_len = 0;
2239         resp->p = resp->xbuf->tail[0].iov_base;
2240         resp->end = resp->p + PAGE_SIZE/4;
2241
2242         return 0;
2243 err_no_verf:
2244         p = savep;
2245         ADJUST_ARGS();
2246         return nfserr;
2247 }
2248
2249 static void
2250 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2251 {
2252         ENCODE_HEAD;
2253
2254         if (!nfserr) {
2255                 RESERVE_SPACE(20);
2256                 WRITECINFO(remove->rm_cinfo);
2257                 ADJUST_ARGS();
2258         }
2259 }
2260
2261 static void
2262 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2263 {
2264         ENCODE_HEAD;
2265
2266         if (!nfserr) {
2267                 RESERVE_SPACE(40);
2268                 WRITECINFO(rename->rn_sinfo);
2269                 WRITECINFO(rename->rn_tinfo);
2270                 ADJUST_ARGS();
2271         }
2272 }
2273
2274 /*
2275  * The SETATTR encode routine is special -- it always encodes a bitmap,
2276  * regardless of the error status.
2277  */
2278 static void
2279 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2280 {
2281         ENCODE_HEAD;
2282
2283         RESERVE_SPACE(12);
2284         if (nfserr) {
2285                 WRITE32(2);
2286                 WRITE32(0);
2287                 WRITE32(0);
2288         }
2289         else {
2290                 WRITE32(2);
2291                 WRITE32(setattr->sa_bmval[0]);
2292                 WRITE32(setattr->sa_bmval[1]);
2293         }
2294         ADJUST_ARGS();
2295 }
2296
2297 static void
2298 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2299 {
2300         ENCODE_HEAD;
2301
2302         if (!nfserr) {
2303                 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2304                 WRITEMEM(&scd->se_clientid, 8);
2305                 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2306                 ADJUST_ARGS();
2307         }
2308         else if (nfserr == nfserr_clid_inuse) {
2309                 RESERVE_SPACE(8);
2310                 WRITE32(0);
2311                 WRITE32(0);
2312                 ADJUST_ARGS();
2313         }
2314 }
2315
2316 static void
2317 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2318 {
2319         ENCODE_HEAD;
2320
2321         if (!nfserr) {
2322                 RESERVE_SPACE(16);
2323                 WRITE32(write->wr_bytes_written);
2324                 WRITE32(write->wr_how_written);
2325                 WRITEMEM(write->wr_verifier.data, 8);
2326                 ADJUST_ARGS();
2327         }
2328 }
2329
2330 void
2331 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2332 {
2333         u32 *statp;
2334         ENCODE_HEAD;
2335
2336         RESERVE_SPACE(8);
2337         WRITE32(op->opnum);
2338         statp = p++;    /* to be backfilled at the end */
2339         ADJUST_ARGS();
2340
2341         switch (op->opnum) {
2342         case OP_ACCESS:
2343                 nfsd4_encode_access(resp, op->status, &op->u.access);
2344                 break;
2345         case OP_CLOSE:
2346                 nfsd4_encode_close(resp, op->status, &op->u.close);
2347                 break;
2348         case OP_COMMIT:
2349                 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2350                 break;
2351         case OP_CREATE:
2352                 nfsd4_encode_create(resp, op->status, &op->u.create);
2353                 break;
2354         case OP_DELEGRETURN:
2355                 break;
2356         case OP_GETATTR:
2357                 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2358                 break;
2359         case OP_GETFH:
2360                 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2361                 break;
2362         case OP_LINK:
2363                 nfsd4_encode_link(resp, op->status, &op->u.link);
2364                 break;
2365         case OP_LOCK:
2366                 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2367                 break;
2368         case OP_LOCKT:
2369                 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2370                 break;
2371         case OP_LOCKU:
2372                 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2373                 break;
2374         case OP_LOOKUP:
2375                 break;
2376         case OP_LOOKUPP:
2377                 break;
2378         case OP_NVERIFY:
2379                 break;
2380         case OP_OPEN:
2381                 nfsd4_encode_open(resp, op->status, &op->u.open);
2382                 break;
2383         case OP_OPEN_CONFIRM:
2384                 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2385                 break;
2386         case OP_OPEN_DOWNGRADE:
2387                 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2388                 break;
2389         case OP_PUTFH:
2390                 break;
2391         case OP_PUTROOTFH:
2392                 break;
2393         case OP_READ:
2394                 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2395                 break;
2396         case OP_READDIR:
2397                 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2398                 break;
2399         case OP_READLINK:
2400                 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2401                 break;
2402         case OP_REMOVE:
2403                 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2404                 break;
2405         case OP_RENAME:
2406                 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2407                 break;
2408         case OP_RENEW:
2409                 break;
2410         case OP_RESTOREFH:
2411                 break;
2412         case OP_SAVEFH:
2413                 break;
2414         case OP_SETATTR:
2415                 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2416                 break;
2417         case OP_SETCLIENTID:
2418                 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2419                 break;
2420         case OP_SETCLIENTID_CONFIRM:
2421                 break;
2422         case OP_VERIFY:
2423                 break;
2424         case OP_WRITE:
2425                 nfsd4_encode_write(resp, op->status, &op->u.write);
2426                 break;
2427         case OP_RELEASE_LOCKOWNER:
2428                 break;
2429         default:
2430                 break;
2431         }
2432
2433         /*
2434          * Note: We write the status directly, instead of using WRITE32(),
2435          * since it is already in network byte order.
2436          */
2437         *statp = op->status;
2438 }
2439
2440 /*
2441  * Encode the reply stored in the stateowner reply cache
2442  *
2443  * XDR note: do not encode rp->rp_buflen: the buffer contains the
2444  * previously sent already encoded operation.
2445  *
2446  * called with nfs4_lock_state() held
2447  */
2448 void
2449 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2450 {
2451         ENCODE_HEAD;
2452         struct nfs4_replay *rp = op->replay;
2453
2454         BUG_ON(!rp);
2455
2456         RESERVE_SPACE(8);
2457         WRITE32(op->opnum);
2458         *p++ = rp->rp_status;  /* already xdr'ed */
2459         ADJUST_ARGS();
2460
2461         RESERVE_SPACE(rp->rp_buflen);
2462         WRITEMEM(rp->rp_buf, rp->rp_buflen);
2463         ADJUST_ARGS();
2464 }
2465
2466 /*
2467  * END OF "GENERIC" ENCODE ROUTINES.
2468  */
2469
2470 int
2471 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2472 {
2473         return xdr_ressize_check(rqstp, p);
2474 }
2475
2476 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2477 {
2478         if (args->ops != args->iops) {
2479                 kfree(args->ops);
2480                 args->ops = args->iops;
2481         }
2482         if (args->tmpp) {
2483                 kfree(args->tmpp);
2484                 args->tmpp = NULL;
2485         }
2486         while (args->to_free) {
2487                 struct tmpbuf *tb = args->to_free;
2488                 args->to_free = tb->next;
2489                 tb->release(tb->buf);
2490                 kfree(tb);
2491         }
2492 }
2493
2494 int
2495 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2496 {
2497         int status;
2498
2499         args->p = p;
2500         args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2501         args->pagelist = rqstp->rq_arg.pages;
2502         args->pagelen = rqstp->rq_arg.page_len;
2503         args->tmpp = NULL;
2504         args->to_free = NULL;
2505         args->ops = args->iops;
2506         args->rqstp = rqstp;
2507
2508         status = nfsd4_decode_compound(args);
2509         if (status) {
2510                 nfsd4_release_compoundargs(args);
2511         }
2512         return !status;
2513 }
2514
2515 int
2516 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2517 {
2518         /*
2519          * All that remains is to write the tag and operation count...
2520          */
2521         struct kvec *iov;
2522         p = resp->tagp;
2523         *p++ = htonl(resp->taglen);
2524         memcpy(p, resp->tag, resp->taglen);
2525         p += XDR_QUADLEN(resp->taglen);
2526         *p++ = htonl(resp->opcnt);
2527
2528         if (rqstp->rq_res.page_len)
2529                 iov = &rqstp->rq_res.tail[0];
2530         else
2531                 iov = &rqstp->rq_res.head[0];
2532         iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2533         BUG_ON(iov->iov_len > PAGE_SIZE);
2534         return 1;
2535 }
2536
2537 /*
2538  * Local variables:
2539  *  c-basic-offset: 8
2540  * End:
2541  */