fs/nfsd/nfsxdr.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * XDR support for nfsd
   4  *
   5  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
   6  */
   7
   8 #include "vfs.h"
   9 #include "xdr.h"
  10 #include "auth.h"
  11
  12 /*
  13  * Mapping of S_IF* types to NFS file types
  14  */
  15 static const u32 nfs_ftypes[] = {
  16         NFNON,  NFCHR,  NFCHR, NFBAD,
  17         NFDIR,  NFBAD,  NFBLK, NFBAD,
  18         NFREG,  NFBAD,  NFLNK, NFBAD,
  19         NFSOCK, NFBAD,  NFLNK, NFBAD,
  20 };
  21
  22
  23 /*
  24  * Basic NFSv2 data types (RFC 1094 Section 2.3)
  25  */
  26
  27 /**
  28  * svcxdr_encode_stat - Encode an NFSv2 status code
  29  * @xdr: XDR stream
  30  * @status: status value to encode
  31  *
  32  * Return values:
  33  *   %false: Send buffer space was exhausted
  34  *   %true: Success
  35  */
  36 bool
  37 svcxdr_encode_stat(struct xdr_stream *xdr, __be32 status)
  38 {
  39         __be32 *p;
  40
  41         p = xdr_reserve_space(xdr, sizeof(status));
  42         if (!p)
  43                 return false;
  44         *p = status;
  45
  46         return true;
  47 }
  48
  49 /**
  50  * svcxdr_decode_fhandle - Decode an NFSv2 file handle
  51  * @xdr: XDR stream positioned at an encoded NFSv2 FH
  52  * @fhp: OUT: filled-in server file handle
  53  *
  54  * Return values:
  55  *  %false: The encoded file handle was not valid
  56  *  %true: @fhp has been initialized
  57  */
  58 bool
  59 svcxdr_decode_fhandle(struct xdr_stream *xdr, struct svc_fh *fhp)
  60 {
  61         __be32 *p;
  62
  63         p = xdr_inline_decode(xdr, NFS_FHSIZE);
  64         if (!p)
  65                 return false;
  66         fh_init(fhp, NFS_FHSIZE);
  67         memcpy(&fhp->fh_handle.fh_raw, p, NFS_FHSIZE);
  68         fhp->fh_handle.fh_size = NFS_FHSIZE;
  69
  70         return true;
  71 }
  72
  73 static bool
  74 svcxdr_encode_fhandle(struct xdr_stream *xdr, const struct svc_fh *fhp)
  75 {
  76         __be32 *p;
  77
  78         p = xdr_reserve_space(xdr, NFS_FHSIZE);
  79         if (!p)
  80                 return false;
  81         memcpy(p, &fhp->fh_handle.fh_raw, NFS_FHSIZE);
  82
  83         return true;
  84 }
  85
  86 static __be32 *
  87 encode_timeval(__be32 *p, const struct timespec64 *time)
  88 {
  89         *p++ = cpu_to_be32((u32)time->tv_sec);
  90         if (time->tv_nsec)
  91                 *p++ = cpu_to_be32(time->tv_nsec / NSEC_PER_USEC);
  92         else
  93                 *p++ = xdr_zero;
  94         return p;
  95 }
  96
  97 static bool
  98 svcxdr_decode_filename(struct xdr_stream *xdr, char **name, unsigned int *len)
  99 {
 100         u32 size, i;
 101         __be32 *p;
 102         char *c;
 103
 104         if (xdr_stream_decode_u32(xdr, &size) < 0)
 105                 return false;
 106         if (size == 0 || size > NFS_MAXNAMLEN)
 107                 return false;
 108         p = xdr_inline_decode(xdr, size);
 109         if (!p)
 110                 return false;
 111
 112         *len = size;
 113         *name = (char *)p;
 114         for (i = 0, c = *name; i < size; i++, c++)
 115                 if (*c == '\0' || *c == '/')
 116                         return false;
 117
 118         return true;
 119 }
 120
 121 static bool
 122 svcxdr_decode_diropargs(struct xdr_stream *xdr, struct svc_fh *fhp,
 123                         char **name, unsigned int *len)
 124 {
 125         return svcxdr_decode_fhandle(xdr, fhp) &&
 126                 svcxdr_decode_filename(xdr, name, len);
 127 }
 128
 129 static bool
 130 svcxdr_decode_sattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
 131                     struct iattr *iap)
 132 {
 133         u32 tmp1, tmp2;
 134         __be32 *p;
 135
 136         p = xdr_inline_decode(xdr, XDR_UNIT * 8);
 137         if (!p)
 138                 return false;
 139
 140         iap->ia_valid = 0;
 141
 142         /*
 143          * Some Sun clients put 0xffff in the mode field when they
 144          * mean 0xffffffff.
 145          */
 146         tmp1 = be32_to_cpup(p++);
 147         if (tmp1 != (u32)-1 && tmp1 != 0xffff) {
 148                 iap->ia_valid |= ATTR_MODE;
 149                 iap->ia_mode = tmp1;
 150         }
 151
 152         tmp1 = be32_to_cpup(p++);
 153         if (tmp1 != (u32)-1) {
 154                 iap->ia_uid = make_kuid(nfsd_user_namespace(rqstp), tmp1);
 155                 if (uid_valid(iap->ia_uid))
 156                         iap->ia_valid |= ATTR_UID;
 157         }
 158
 159         tmp1 = be32_to_cpup(p++);
 160         if (tmp1 != (u32)-1) {
 161                 iap->ia_gid = make_kgid(nfsd_user_namespace(rqstp), tmp1);
 162                 if (gid_valid(iap->ia_gid))
 163                         iap->ia_valid |= ATTR_GID;
 164         }
 165
 166         tmp1 = be32_to_cpup(p++);
 167         if (tmp1 != (u32)-1) {
 168                 iap->ia_valid |= ATTR_SIZE;
 169                 iap->ia_size = tmp1;
 170         }
 171
 172         tmp1 = be32_to_cpup(p++);
 173         tmp2 = be32_to_cpup(p++);
 174         if (tmp1 != (u32)-1 && tmp2 != (u32)-1) {
 175                 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
 176                 iap->ia_atime.tv_sec = tmp1;
 177                 iap->ia_atime.tv_nsec = tmp2 * NSEC_PER_USEC;
 178         }
 179
 180         tmp1 = be32_to_cpup(p++);
 181         tmp2 = be32_to_cpup(p++);
 182         if (tmp1 != (u32)-1 && tmp2 != (u32)-1) {
 183                 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
 184                 iap->ia_mtime.tv_sec = tmp1;
 185                 iap->ia_mtime.tv_nsec = tmp2 * NSEC_PER_USEC;
 186                 /*
 187                  * Passing the invalid value useconds=1000000 for mtime
 188                  * is a Sun convention for "set both mtime and atime to
 189                  * current server time".  It's needed to make permissions
 190                  * checks for the "touch" program across v2 mounts to
 191                  * Solaris and Irix boxes work correctly. See description of
 192                  * sattr in section 6.1 of "NFS Illustrated" by
 193                  * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
 194                  */
 195                 if (tmp2 == 1000000)
 196                         iap->ia_valid &= ~(ATTR_ATIME_SET|ATTR_MTIME_SET);
 197         }
 198
 199         return true;
 200 }
 201
 202 /**
 203  * svcxdr_encode_fattr - Encode NFSv2 file attributes
 204  * @rqstp: Context of a completed RPC transaction
 205  * @xdr: XDR stream
 206  * @fhp: File handle to encode
 207  * @stat: Attributes to encode
 208  *
 209  * Return values:
 210  *   %false: Send buffer space was exhausted
 211  *   %true: Success
 212  */
 213 bool
 214 svcxdr_encode_fattr(struct svc_rqst *rqstp, struct xdr_stream *xdr,
 215                     const struct svc_fh *fhp, const struct kstat *stat)
 216 {
 217         struct user_namespace *userns = nfsd_user_namespace(rqstp);
 218         struct dentry *dentry = fhp->fh_dentry;
 219         int type = stat->mode & S_IFMT;
 220         struct timespec64 time;
 221         __be32 *p;
 222         u32 fsid;
 223
 224         p = xdr_reserve_space(xdr, XDR_UNIT * 17);
 225         if (!p)
 226                 return false;
 227
 228         *p++ = cpu_to_be32(nfs_ftypes[type >> 12]);
 229         *p++ = cpu_to_be32((u32)stat->mode);
 230         *p++ = cpu_to_be32((u32)stat->nlink);
 231         *p++ = cpu_to_be32((u32)from_kuid_munged(userns, stat->uid));
 232         *p++ = cpu_to_be32((u32)from_kgid_munged(userns, stat->gid));
 233
 234         if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN)
 235                 *p++ = cpu_to_be32(NFS_MAXPATHLEN);
 236         else
 237                 *p++ = cpu_to_be32((u32) stat->size);
 238         *p++ = cpu_to_be32((u32) stat->blksize);
 239         if (S_ISCHR(type) || S_ISBLK(type))
 240                 *p++ = cpu_to_be32(new_encode_dev(stat->rdev));
 241         else
 242                 *p++ = cpu_to_be32(0xffffffff);
 243         *p++ = cpu_to_be32((u32)stat->blocks);
 244
 245         switch (fsid_source(fhp)) {
 246         case FSIDSOURCE_FSID:
 247                 fsid = (u32)fhp->fh_export->ex_fsid;
 248                 break;
 249         case FSIDSOURCE_UUID:
 250                 fsid = ((u32 *)fhp->fh_export->ex_uuid)[0];
 251                 fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[1];
 252                 fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[2];
 253                 fsid ^= ((u32 *)fhp->fh_export->ex_uuid)[3];
 254                 break;
 255         default:
 256                 fsid = new_encode_dev(stat->dev);
 257                 break;
 258         }
 259         *p++ = cpu_to_be32(fsid);
 260
 261         *p++ = cpu_to_be32((u32)stat->ino);
 262         p = encode_timeval(p, &stat->atime);
 263         time = stat->mtime;
 264         lease_get_mtime(d_inode(dentry), &time);
 265         p = encode_timeval(p, &time);
 266         encode_timeval(p, &stat->ctime);
 267
 268         return true;
 269 }
 270
 271 /*
 272  * XDR decode functions
 273  */
 274
 275 bool
 276 nfssvc_decode_fhandleargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 277 {
 278         struct nfsd_fhandle *args = rqstp->rq_argp;
 279
 280         return svcxdr_decode_fhandle(xdr, &args->fh);
 281 }
 282
 283 bool
 284 nfssvc_decode_sattrargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 285 {
 286         struct nfsd_sattrargs *args = rqstp->rq_argp;
 287
 288         return svcxdr_decode_fhandle(xdr, &args->fh) &&
 289                 svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
 290 }
 291
 292 bool
 293 nfssvc_decode_diropargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 294 {
 295         struct nfsd_diropargs *args = rqstp->rq_argp;
 296
 297         return svcxdr_decode_diropargs(xdr, &args->fh, &args->name, &args->len);
 298 }
 299
 300 bool
 301 nfssvc_decode_readargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 302 {
 303         struct nfsd_readargs *args = rqstp->rq_argp;
 304         u32 totalcount;
 305
 306         if (!svcxdr_decode_fhandle(xdr, &args->fh))
 307                 return false;
 308         if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
 309                 return false;
 310         if (xdr_stream_decode_u32(xdr, &args->count) < 0)
 311                 return false;
 312         /* totalcount is ignored */
 313         if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
 314                 return false;
 315
 316         return true;
 317 }
 318
 319 bool
 320 nfssvc_decode_writeargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 321 {
 322         struct nfsd_writeargs *args = rqstp->rq_argp;
 323         u32 beginoffset, totalcount;
 324
 325         if (!svcxdr_decode_fhandle(xdr, &args->fh))
 326                 return false;
 327         /* beginoffset is ignored */
 328         if (xdr_stream_decode_u32(xdr, &beginoffset) < 0)
 329                 return false;
 330         if (xdr_stream_decode_u32(xdr, &args->offset) < 0)
 331                 return false;
 332         /* totalcount is ignored */
 333         if (xdr_stream_decode_u32(xdr, &totalcount) < 0)
 334                 return false;
 335
 336         /* opaque data */
 337         if (xdr_stream_decode_u32(xdr, &args->len) < 0)
 338                 return false;
 339         if (args->len > NFSSVC_MAXBLKSIZE_V2)
 340                 return false;
 341
 342         return xdr_stream_subsegment(xdr, &args->payload, args->len);
 343 }
 344
 345 bool
 346 nfssvc_decode_createargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 347 {
 348         struct nfsd_createargs *args = rqstp->rq_argp;
 349
 350         return svcxdr_decode_diropargs(xdr, &args->fh,
 351                                        &args->name, &args->len) &&
 352                 svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
 353 }
 354
 355 bool
 356 nfssvc_decode_renameargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 357 {
 358         struct nfsd_renameargs *args = rqstp->rq_argp;
 359
 360         return svcxdr_decode_diropargs(xdr, &args->ffh,
 361                                        &args->fname, &args->flen) &&
 362                 svcxdr_decode_diropargs(xdr, &args->tfh,
 363                                         &args->tname, &args->tlen);
 364 }
 365
 366 bool
 367 nfssvc_decode_linkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 368 {
 369         struct nfsd_linkargs *args = rqstp->rq_argp;
 370
 371         return svcxdr_decode_fhandle(xdr, &args->ffh) &&
 372                 svcxdr_decode_diropargs(xdr, &args->tfh,
 373                                         &args->tname, &args->tlen);
 374 }
 375
 376 bool
 377 nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 378 {
 379         struct nfsd_symlinkargs *args = rqstp->rq_argp;
 380         struct kvec *head = rqstp->rq_arg.head;
 381
 382         if (!svcxdr_decode_diropargs(xdr, &args->ffh, &args->fname, &args->flen))
 383                 return false;
 384         if (xdr_stream_decode_u32(xdr, &args->tlen) < 0)
 385                 return false;
 386         if (args->tlen == 0)
 387                 return false;
 388
 389         args->first.iov_len = head->iov_len - xdr_stream_pos(xdr);
 390         args->first.iov_base = xdr_inline_decode(xdr, args->tlen);
 391         if (!args->first.iov_base)
 392                 return false;
 393         return svcxdr_decode_sattr(rqstp, xdr, &args->attrs);
 394 }
 395
 396 bool
 397 nfssvc_decode_readdirargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 398 {
 399         struct nfsd_readdirargs *args = rqstp->rq_argp;
 400
 401         if (!svcxdr_decode_fhandle(xdr, &args->fh))
 402                 return false;
 403         if (xdr_stream_decode_u32(xdr, &args->cookie) < 0)
 404                 return false;
 405         if (xdr_stream_decode_u32(xdr, &args->count) < 0)
 406                 return false;
 407
 408         return true;
 409 }
 410
 411 /*
 412  * XDR encode functions
 413  */
 414
 415 bool
 416 nfssvc_encode_statres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 417 {
 418         struct nfsd_stat *resp = rqstp->rq_resp;
 419
 420         return svcxdr_encode_stat(xdr, resp->status);
 421 }
 422
 423 bool
 424 nfssvc_encode_attrstatres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 425 {
 426         struct nfsd_attrstat *resp = rqstp->rq_resp;
 427
 428         if (!svcxdr_encode_stat(xdr, resp->status))
 429                 return false;
 430         switch (resp->status) {
 431         case nfs_ok:
 432                 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
 433                         return false;
 434                 break;
 435         }
 436
 437         return true;
 438 }
 439
 440 bool
 441 nfssvc_encode_diropres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 442 {
 443         struct nfsd_diropres *resp = rqstp->rq_resp;
 444
 445         if (!svcxdr_encode_stat(xdr, resp->status))
 446                 return false;
 447         switch (resp->status) {
 448         case nfs_ok:
 449                 if (!svcxdr_encode_fhandle(xdr, &resp->fh))
 450                         return false;
 451                 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
 452                         return false;
 453                 break;
 454         }
 455
 456         return true;
 457 }
 458
 459 bool
 460 nfssvc_encode_readlinkres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 461 {
 462         struct nfsd_readlinkres *resp = rqstp->rq_resp;
 463         struct kvec *head = rqstp->rq_res.head;
 464
 465         if (!svcxdr_encode_stat(xdr, resp->status))
 466                 return false;
 467         switch (resp->status) {
 468         case nfs_ok:
 469                 if (xdr_stream_encode_u32(xdr, resp->len) < 0)
 470                         return false;
 471                 svcxdr_encode_opaque_pages(rqstp, xdr, &resp->page, 0,
 472                                            resp->len);
 473                 if (svc_encode_result_payload(rqstp, head->iov_len, resp->len) < 0)
 474                         return false;
 475                 break;
 476         }
 477
 478         return true;
 479 }
 480
 481 bool
 482 nfssvc_encode_readres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 483 {
 484         struct nfsd_readres *resp = rqstp->rq_resp;
 485         struct kvec *head = rqstp->rq_res.head;
 486
 487         if (!svcxdr_encode_stat(xdr, resp->status))
 488                 return false;
 489         switch (resp->status) {
 490         case nfs_ok:
 491                 if (!svcxdr_encode_fattr(rqstp, xdr, &resp->fh, &resp->stat))
 492                         return false;
 493                 if (xdr_stream_encode_u32(xdr, resp->count) < 0)
 494                         return false;
 495                 svcxdr_encode_opaque_pages(rqstp, xdr, resp->pages,
 496                                            rqstp->rq_res.page_base,
 497                                            resp->count);
 498                 if (svc_encode_result_payload(rqstp, head->iov_len, resp->count) < 0)
 499                         return false;
 500                 break;
 501         }
 502
 503         return true;
 504 }
 505
 506 bool
 507 nfssvc_encode_readdirres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 508 {
 509         struct nfsd_readdirres *resp = rqstp->rq_resp;
 510         struct xdr_buf *dirlist = &resp->dirlist;
 511
 512         if (!svcxdr_encode_stat(xdr, resp->status))
 513                 return false;
 514         switch (resp->status) {
 515         case nfs_ok:
 516                 svcxdr_encode_opaque_pages(rqstp, xdr, dirlist->pages, 0,
 517                                            dirlist->len);
 518                 /* no more entries */
 519                 if (xdr_stream_encode_item_absent(xdr) < 0)
 520                         return false;
 521                 if (xdr_stream_encode_bool(xdr, resp->common.err == nfserr_eof) < 0)
 522                         return false;
 523                 break;
 524         }
 525
 526         return true;
 527 }
 528
 529 bool
 530 nfssvc_encode_statfsres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
 531 {
 532         struct nfsd_statfsres *resp = rqstp->rq_resp;
 533         struct kstatfs  *stat = &resp->stats;
 534         __be32 *p;
 535
 536         if (!svcxdr_encode_stat(xdr, resp->status))
 537                 return false;
 538         switch (resp->status) {
 539         case nfs_ok:
 540                 p = xdr_reserve_space(xdr, XDR_UNIT * 5);
 541                 if (!p)
 542                         return false;
 543                 *p++ = cpu_to_be32(NFSSVC_MAXBLKSIZE_V2);
 544                 *p++ = cpu_to_be32(stat->f_bsize);
 545                 *p++ = cpu_to_be32(stat->f_blocks);
 546                 *p++ = cpu_to_be32(stat->f_bfree);
 547                 *p = cpu_to_be32(stat->f_bavail);
 548                 break;
 549         }
 550
 551         return true;
 552 }
 553
 554 /**
 555  * nfssvc_encode_nfscookie - Encode a directory offset cookie
 556  * @resp: readdir result context
 557  * @offset: offset cookie to encode
 558  *
 559  * The buffer space for the offset cookie has already been reserved
 560  * by svcxdr_encode_entry_common().
 561  */
 562 void nfssvc_encode_nfscookie(struct nfsd_readdirres *resp, u32 offset)
 563 {
 564         __be32 cookie = cpu_to_be32(offset);
 565
 566         if (!resp->cookie_offset)
 567                 return;
 568
 569         write_bytes_to_xdr_buf(&resp->dirlist, resp->cookie_offset, &cookie,
 570                                sizeof(cookie));
 571         resp->cookie_offset = 0;
 572 }
 573
 574 static bool
 575 svcxdr_encode_entry_common(struct nfsd_readdirres *resp, const char *name,
 576                            int namlen, loff_t offset, u64 ino)
 577 {
 578         struct xdr_buf *dirlist = &resp->dirlist;
 579         struct xdr_stream *xdr = &resp->xdr;
 580
 581         if (xdr_stream_encode_item_present(xdr) < 0)
 582                 return false;
 583         /* fileid */
 584         if (xdr_stream_encode_u32(xdr, (u32)ino) < 0)
 585                 return false;
 586         /* name */
 587         if (xdr_stream_encode_opaque(xdr, name, min(namlen, NFS2_MAXNAMLEN)) < 0)
 588                 return false;
 589         /* cookie */
 590         resp->cookie_offset = dirlist->len;
 591         if (xdr_stream_encode_u32(xdr, ~0U) < 0)
 592                 return false;
 593
 594         return true;
 595 }
 596
 597 /**
 598  * nfssvc_encode_entry - encode one NFSv2 READDIR entry
 599  * @data: directory context
 600  * @name: name of the object to be encoded
 601  * @namlen: length of that name, in bytes
 602  * @offset: the offset of the previous entry
 603  * @ino: the fileid of this entry
 604  * @d_type: unused
 605  *
 606  * Return values:
 607  *   %0: Entry was successfully encoded.
 608  *   %-EINVAL: An encoding problem occured, secondary status code in resp->common.err
 609  *
 610  * On exit, the following fields are updated:
 611  *   - resp->xdr
 612  *   - resp->common.err
 613  *   - resp->cookie_offset
 614  */
 615 int nfssvc_encode_entry(void *data, const char *name, int namlen,
 616                         loff_t offset, u64 ino, unsigned int d_type)
 617 {
 618         struct readdir_cd *ccd = data;
 619         struct nfsd_readdirres *resp = container_of(ccd,
 620                                                     struct nfsd_readdirres,
 621                                                     common);
 622         unsigned int starting_length = resp->dirlist.len;
 623
 624         /* The offset cookie for the previous entry */
 625         nfssvc_encode_nfscookie(resp, offset);
 626
 627         if (!svcxdr_encode_entry_common(resp, name, namlen, offset, ino))
 628                 goto out_toosmall;
 629
 630         xdr_commit_encode(&resp->xdr);
 631         resp->common.err = nfs_ok;
 632         return 0;
 633
 634 out_toosmall:
 635         resp->cookie_offset = 0;
 636         resp->common.err = nfserr_toosmall;
 637         resp->dirlist.len = starting_length;
 638         return -EINVAL;
 639 }
 640
 641 /*
 642  * XDR release functions
 643  */
 644 void nfssvc_release_attrstat(struct svc_rqst *rqstp)
 645 {
 646         struct nfsd_attrstat *resp = rqstp->rq_resp;
 647
 648         fh_put(&resp->fh);
 649 }
 650
 651 void nfssvc_release_diropres(struct svc_rqst *rqstp)
 652 {
 653         struct nfsd_diropres *resp = rqstp->rq_resp;
 654
 655         fh_put(&resp->fh);
 656 }
 657
 658 void nfssvc_release_readres(struct svc_rqst *rqstp)
 659 {
 660         struct nfsd_readres *resp = rqstp->rq_resp;
 661
 662         fh_put(&resp->fh);
 663 }