linux/fs/nfsd/nfs3proc.c
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   1/*
   2 * Process version 3 NFS requests.
   3 *
   4 * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
   5 */
   6
   7#include <linux/fs.h>
   8#include <linux/ext2_fs.h>
   9#include <linux/magic.h>
  10
  11#include "cache.h"
  12#include "xdr3.h"
  13#include "vfs.h"
  14
  15#define NFSDDBG_FACILITY                NFSDDBG_PROC
  16
  17#define RETURN_STATUS(st)       { resp->status = (st); return (st); }
  18
  19static int      nfs3_ftypes[] = {
  20        0,                      /* NF3NON */
  21        S_IFREG,                /* NF3REG */
  22        S_IFDIR,                /* NF3DIR */
  23        S_IFBLK,                /* NF3BLK */
  24        S_IFCHR,                /* NF3CHR */
  25        S_IFLNK,                /* NF3LNK */
  26        S_IFSOCK,               /* NF3SOCK */
  27        S_IFIFO,                /* NF3FIFO */
  28};
  29
  30/*
  31 * NULL call.
  32 */
  33static __be32
  34nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
  35{
  36        return nfs_ok;
  37}
  38
  39/*
  40 * Get a file's attributes
  41 */
  42static __be32
  43nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
  44                                           struct nfsd3_attrstat *resp)
  45{
  46        int     err;
  47        __be32  nfserr;
  48
  49        dprintk("nfsd: GETATTR(3)  %s\n",
  50                SVCFH_fmt(&argp->fh));
  51
  52        fh_copy(&resp->fh, &argp->fh);
  53        nfserr = fh_verify(rqstp, &resp->fh, 0,
  54                        NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
  55        if (nfserr)
  56                RETURN_STATUS(nfserr);
  57
  58        err = vfs_getattr(resp->fh.fh_export->ex_path.mnt,
  59                          resp->fh.fh_dentry, &resp->stat);
  60        nfserr = nfserrno(err);
  61
  62        RETURN_STATUS(nfserr);
  63}
  64
  65/*
  66 * Set a file's attributes
  67 */
  68static __be32
  69nfsd3_proc_setattr(struct svc_rqst *rqstp, struct nfsd3_sattrargs *argp,
  70                                           struct nfsd3_attrstat  *resp)
  71{
  72        __be32  nfserr;
  73
  74        dprintk("nfsd: SETATTR(3)  %s\n",
  75                                SVCFH_fmt(&argp->fh));
  76
  77        fh_copy(&resp->fh, &argp->fh);
  78        nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
  79                              argp->check_guard, argp->guardtime);
  80        RETURN_STATUS(nfserr);
  81}
  82
  83/*
  84 * Look up a path name component
  85 */
  86static __be32
  87nfsd3_proc_lookup(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
  88                                          struct nfsd3_diropres  *resp)
  89{
  90        __be32  nfserr;
  91
  92        dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
  93                                SVCFH_fmt(&argp->fh),
  94                                argp->len,
  95                                argp->name);
  96
  97        fh_copy(&resp->dirfh, &argp->fh);
  98        fh_init(&resp->fh, NFS3_FHSIZE);
  99
 100        nfserr = nfsd_lookup(rqstp, &resp->dirfh,
 101                                    argp->name,
 102                                    argp->len,
 103                                    &resp->fh);
 104        RETURN_STATUS(nfserr);
 105}
 106
 107/*
 108 * Check file access
 109 */
 110static __be32
 111nfsd3_proc_access(struct svc_rqst *rqstp, struct nfsd3_accessargs *argp,
 112                                          struct nfsd3_accessres *resp)
 113{
 114        __be32  nfserr;
 115
 116        dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
 117                                SVCFH_fmt(&argp->fh),
 118                                argp->access);
 119
 120        fh_copy(&resp->fh, &argp->fh);
 121        resp->access = argp->access;
 122        nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
 123        RETURN_STATUS(nfserr);
 124}
 125
 126/*
 127 * Read a symlink.
 128 */
 129static __be32
 130nfsd3_proc_readlink(struct svc_rqst *rqstp, struct nfsd3_readlinkargs *argp,
 131                                           struct nfsd3_readlinkres *resp)
 132{
 133        __be32 nfserr;
 134
 135        dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
 136
 137        /* Read the symlink. */
 138        fh_copy(&resp->fh, &argp->fh);
 139        resp->len = NFS3_MAXPATHLEN;
 140        nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
 141        RETURN_STATUS(nfserr);
 142}
 143
 144/*
 145 * Read a portion of a file.
 146 */
 147static __be32
 148nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp,
 149                                        struct nfsd3_readres  *resp)
 150{
 151        __be32  nfserr;
 152        u32     max_blocksize = svc_max_payload(rqstp);
 153
 154        dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
 155                                SVCFH_fmt(&argp->fh),
 156                                (unsigned long) argp->count,
 157                                (unsigned long long) argp->offset);
 158
 159        /* Obtain buffer pointer for payload.
 160         * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
 161         * + 1 (xdr opaque byte count) = 26
 162         */
 163
 164        resp->count = argp->count;
 165        if (max_blocksize < resp->count)
 166                resp->count = max_blocksize;
 167
 168        svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
 169
 170        fh_copy(&resp->fh, &argp->fh);
 171        nfserr = nfsd_read(rqstp, &resp->fh,
 172                                  argp->offset,
 173                                  rqstp->rq_vec, argp->vlen,
 174                                  &resp->count);
 175        if (nfserr == 0) {
 176                struct inode    *inode = resp->fh.fh_dentry->d_inode;
 177
 178                resp->eof = (argp->offset + resp->count) >= inode->i_size;
 179        }
 180
 181        RETURN_STATUS(nfserr);
 182}
 183
 184/*
 185 * Write data to a file
 186 */
 187static __be32
 188nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
 189                                         struct nfsd3_writeres  *resp)
 190{
 191        __be32  nfserr;
 192        unsigned long cnt = argp->len;
 193
 194        dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
 195                                SVCFH_fmt(&argp->fh),
 196                                argp->len,
 197                                (unsigned long long) argp->offset,
 198                                argp->stable? " stable" : "");
 199
 200        fh_copy(&resp->fh, &argp->fh);
 201        resp->committed = argp->stable;
 202        nfserr = nfsd_write(rqstp, &resp->fh, NULL,
 203                                   argp->offset,
 204                                   rqstp->rq_vec, argp->vlen,
 205                                   &cnt,
 206                                   &resp->committed);
 207        resp->count = cnt;
 208        RETURN_STATUS(nfserr);
 209}
 210
 211/*
 212 * With NFSv3, CREATE processing is a lot easier than with NFSv2.
 213 * At least in theory; we'll see how it fares in practice when the
 214 * first reports about SunOS compatibility problems start to pour in...
 215 */
 216static __be32
 217nfsd3_proc_create(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
 218                                          struct nfsd3_diropres   *resp)
 219{
 220        svc_fh          *dirfhp, *newfhp = NULL;
 221        struct iattr    *attr;
 222        __be32          nfserr;
 223
 224        dprintk("nfsd: CREATE(3)   %s %.*s\n",
 225                                SVCFH_fmt(&argp->fh),
 226                                argp->len,
 227                                argp->name);
 228
 229        dirfhp = fh_copy(&resp->dirfh, &argp->fh);
 230        newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
 231        attr   = &argp->attrs;
 232
 233        /* Get the directory inode */
 234        nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_CREATE);
 235        if (nfserr)
 236                RETURN_STATUS(nfserr);
 237
 238        /* Unfudge the mode bits */
 239        attr->ia_mode &= ~S_IFMT;
 240        if (!(attr->ia_valid & ATTR_MODE)) { 
 241                attr->ia_valid |= ATTR_MODE;
 242                attr->ia_mode = S_IFREG;
 243        } else {
 244                attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
 245        }
 246
 247        /* Now create the file and set attributes */
 248        nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 249                                attr, newfhp,
 250                                argp->createmode, argp->verf, NULL, NULL);
 251
 252        RETURN_STATUS(nfserr);
 253}
 254
 255/*
 256 * Make directory. This operation is not idempotent.
 257 */
 258static __be32
 259nfsd3_proc_mkdir(struct svc_rqst *rqstp, struct nfsd3_createargs *argp,
 260                                         struct nfsd3_diropres   *resp)
 261{
 262        __be32  nfserr;
 263
 264        dprintk("nfsd: MKDIR(3)    %s %.*s\n",
 265                                SVCFH_fmt(&argp->fh),
 266                                argp->len,
 267                                argp->name);
 268
 269        argp->attrs.ia_valid &= ~ATTR_SIZE;
 270        fh_copy(&resp->dirfh, &argp->fh);
 271        fh_init(&resp->fh, NFS3_FHSIZE);
 272        nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 273                                    &argp->attrs, S_IFDIR, 0, &resp->fh);
 274        fh_unlock(&resp->dirfh);
 275        RETURN_STATUS(nfserr);
 276}
 277
 278static __be32
 279nfsd3_proc_symlink(struct svc_rqst *rqstp, struct nfsd3_symlinkargs *argp,
 280                                           struct nfsd3_diropres    *resp)
 281{
 282        __be32  nfserr;
 283
 284        dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
 285                                SVCFH_fmt(&argp->ffh),
 286                                argp->flen, argp->fname,
 287                                argp->tlen, argp->tname);
 288
 289        fh_copy(&resp->dirfh, &argp->ffh);
 290        fh_init(&resp->fh, NFS3_FHSIZE);
 291        nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen,
 292                                                   argp->tname, argp->tlen,
 293                                                   &resp->fh, &argp->attrs);
 294        RETURN_STATUS(nfserr);
 295}
 296
 297/*
 298 * Make socket/fifo/device.
 299 */
 300static __be32
 301nfsd3_proc_mknod(struct svc_rqst *rqstp, struct nfsd3_mknodargs *argp,
 302                                         struct nfsd3_diropres  *resp)
 303{
 304        __be32  nfserr;
 305        int type;
 306        dev_t   rdev = 0;
 307
 308        dprintk("nfsd: MKNOD(3)    %s %.*s\n",
 309                                SVCFH_fmt(&argp->fh),
 310                                argp->len,
 311                                argp->name);
 312
 313        fh_copy(&resp->dirfh, &argp->fh);
 314        fh_init(&resp->fh, NFS3_FHSIZE);
 315
 316        if (argp->ftype == 0 || argp->ftype >= NF3BAD)
 317                RETURN_STATUS(nfserr_inval);
 318        if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
 319                rdev = MKDEV(argp->major, argp->minor);
 320                if (MAJOR(rdev) != argp->major ||
 321                    MINOR(rdev) != argp->minor)
 322                        RETURN_STATUS(nfserr_inval);
 323        } else
 324                if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO)
 325                        RETURN_STATUS(nfserr_inval);
 326
 327        type = nfs3_ftypes[argp->ftype];
 328        nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 329                                    &argp->attrs, type, rdev, &resp->fh);
 330        fh_unlock(&resp->dirfh);
 331        RETURN_STATUS(nfserr);
 332}
 333
 334/*
 335 * Remove file/fifo/socket etc.
 336 */
 337static __be32
 338nfsd3_proc_remove(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
 339                                          struct nfsd3_attrstat  *resp)
 340{
 341        __be32  nfserr;
 342
 343        dprintk("nfsd: REMOVE(3)   %s %.*s\n",
 344                                SVCFH_fmt(&argp->fh),
 345                                argp->len,
 346                                argp->name);
 347
 348        /* Unlink. -S_IFDIR means file must not be a directory */
 349        fh_copy(&resp->fh, &argp->fh);
 350        nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len);
 351        fh_unlock(&resp->fh);
 352        RETURN_STATUS(nfserr);
 353}
 354
 355/*
 356 * Remove a directory
 357 */
 358static __be32
 359nfsd3_proc_rmdir(struct svc_rqst *rqstp, struct nfsd3_diropargs *argp,
 360                                         struct nfsd3_attrstat  *resp)
 361{
 362        __be32  nfserr;
 363
 364        dprintk("nfsd: RMDIR(3)    %s %.*s\n",
 365                                SVCFH_fmt(&argp->fh),
 366                                argp->len,
 367                                argp->name);
 368
 369        fh_copy(&resp->fh, &argp->fh);
 370        nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len);
 371        fh_unlock(&resp->fh);
 372        RETURN_STATUS(nfserr);
 373}
 374
 375static __be32
 376nfsd3_proc_rename(struct svc_rqst *rqstp, struct nfsd3_renameargs *argp,
 377                                          struct nfsd3_renameres  *resp)
 378{
 379        __be32  nfserr;
 380
 381        dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
 382                                SVCFH_fmt(&argp->ffh),
 383                                argp->flen,
 384                                argp->fname);
 385        dprintk("nfsd: -> %s %.*s\n",
 386                                SVCFH_fmt(&argp->tfh),
 387                                argp->tlen,
 388                                argp->tname);
 389
 390        fh_copy(&resp->ffh, &argp->ffh);
 391        fh_copy(&resp->tfh, &argp->tfh);
 392        nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
 393                                    &resp->tfh, argp->tname, argp->tlen);
 394        RETURN_STATUS(nfserr);
 395}
 396
 397static __be32
 398nfsd3_proc_link(struct svc_rqst *rqstp, struct nfsd3_linkargs *argp,
 399                                        struct nfsd3_linkres  *resp)
 400{
 401        __be32  nfserr;
 402
 403        dprintk("nfsd: LINK(3)     %s ->\n",
 404                                SVCFH_fmt(&argp->ffh));
 405        dprintk("nfsd:   -> %s %.*s\n",
 406                                SVCFH_fmt(&argp->tfh),
 407                                argp->tlen,
 408                                argp->tname);
 409
 410        fh_copy(&resp->fh,  &argp->ffh);
 411        fh_copy(&resp->tfh, &argp->tfh);
 412        nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
 413                                  &resp->fh);
 414        RETURN_STATUS(nfserr);
 415}
 416
 417/*
 418 * Read a portion of a directory.
 419 */
 420static __be32
 421nfsd3_proc_readdir(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
 422                                           struct nfsd3_readdirres  *resp)
 423{
 424        __be32          nfserr;
 425        int             count;
 426
 427        dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
 428                                SVCFH_fmt(&argp->fh),
 429                                argp->count, (u32) argp->cookie);
 430
 431        /* Make sure we've room for the NULL ptr & eof flag, and shrink to
 432         * client read size */
 433        count = (argp->count >> 2) - 2;
 434
 435        /* Read directory and encode entries on the fly */
 436        fh_copy(&resp->fh, &argp->fh);
 437
 438        resp->buflen = count;
 439        resp->common.err = nfs_ok;
 440        resp->buffer = argp->buffer;
 441        resp->rqstp = rqstp;
 442        nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
 443                                        &resp->common, nfs3svc_encode_entry);
 444        memcpy(resp->verf, argp->verf, 8);
 445        resp->count = resp->buffer - argp->buffer;
 446        if (resp->offset)
 447                xdr_encode_hyper(resp->offset, argp->cookie);
 448
 449        RETURN_STATUS(nfserr);
 450}
 451
 452/*
 453 * Read a portion of a directory, including file handles and attrs.
 454 * For now, we choose to ignore the dircount parameter.
 455 */
 456static __be32
 457nfsd3_proc_readdirplus(struct svc_rqst *rqstp, struct nfsd3_readdirargs *argp,
 458                                               struct nfsd3_readdirres  *resp)
 459{
 460        __be32  nfserr;
 461        int     count = 0;
 462        loff_t  offset;
 463        int     i;
 464        caddr_t page_addr = NULL;
 465
 466        dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
 467                                SVCFH_fmt(&argp->fh),
 468                                argp->count, (u32) argp->cookie);
 469
 470        /* Convert byte count to number of words (i.e. >> 2),
 471         * and reserve room for the NULL ptr & eof flag (-2 words) */
 472        resp->count = (argp->count >> 2) - 2;
 473
 474        /* Read directory and encode entries on the fly */
 475        fh_copy(&resp->fh, &argp->fh);
 476
 477        resp->common.err = nfs_ok;
 478        resp->buffer = argp->buffer;
 479        resp->buflen = resp->count;
 480        resp->rqstp = rqstp;
 481        offset = argp->cookie;
 482        nfserr = nfsd_readdir(rqstp, &resp->fh,
 483                                     &offset,
 484                                     &resp->common,
 485                                     nfs3svc_encode_entry_plus);
 486        memcpy(resp->verf, argp->verf, 8);
 487        for (i=1; i<rqstp->rq_resused ; i++) {
 488                page_addr = page_address(rqstp->rq_respages[i]);
 489
 490                if (((caddr_t)resp->buffer >= page_addr) &&
 491                    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
 492                        count += (caddr_t)resp->buffer - page_addr;
 493                        break;
 494                }
 495                count += PAGE_SIZE;
 496        }
 497        resp->count = count >> 2;
 498        if (resp->offset) {
 499                if (unlikely(resp->offset1)) {
 500                        /* we ended up with offset on a page boundary */
 501                        *resp->offset = htonl(offset >> 32);
 502                        *resp->offset1 = htonl(offset & 0xffffffff);
 503                        resp->offset1 = NULL;
 504                } else {
 505                        xdr_encode_hyper(resp->offset, offset);
 506                }
 507        }
 508
 509        RETURN_STATUS(nfserr);
 510}
 511
 512/*
 513 * Get file system stats
 514 */
 515static __be32
 516nfsd3_proc_fsstat(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
 517                                           struct nfsd3_fsstatres *resp)
 518{
 519        __be32  nfserr;
 520
 521        dprintk("nfsd: FSSTAT(3)   %s\n",
 522                                SVCFH_fmt(&argp->fh));
 523
 524        nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
 525        fh_put(&argp->fh);
 526        RETURN_STATUS(nfserr);
 527}
 528
 529/*
 530 * Get file system info
 531 */
 532static __be32
 533nfsd3_proc_fsinfo(struct svc_rqst * rqstp, struct nfsd_fhandle    *argp,
 534                                           struct nfsd3_fsinfores *resp)
 535{
 536        __be32  nfserr;
 537        u32     max_blocksize = svc_max_payload(rqstp);
 538
 539        dprintk("nfsd: FSINFO(3)   %s\n",
 540                                SVCFH_fmt(&argp->fh));
 541
 542        resp->f_rtmax  = max_blocksize;
 543        resp->f_rtpref = max_blocksize;
 544        resp->f_rtmult = PAGE_SIZE;
 545        resp->f_wtmax  = max_blocksize;
 546        resp->f_wtpref = max_blocksize;
 547        resp->f_wtmult = PAGE_SIZE;
 548        resp->f_dtpref = PAGE_SIZE;
 549        resp->f_maxfilesize = ~(u32) 0;
 550        resp->f_properties = NFS3_FSF_DEFAULT;
 551
 552        nfserr = fh_verify(rqstp, &argp->fh, 0,
 553                        NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
 554
 555        /* Check special features of the file system. May request
 556         * different read/write sizes for file systems known to have
 557         * problems with large blocks */
 558        if (nfserr == 0) {
 559                struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
 560
 561                /* Note that we don't care for remote fs's here */
 562                if (sb->s_magic == MSDOS_SUPER_MAGIC) {
 563                        resp->f_properties = NFS3_FSF_BILLYBOY;
 564                }
 565                resp->f_maxfilesize = sb->s_maxbytes;
 566        }
 567
 568        fh_put(&argp->fh);
 569        RETURN_STATUS(nfserr);
 570}
 571
 572/*
 573 * Get pathconf info for the specified file
 574 */
 575static __be32
 576nfsd3_proc_pathconf(struct svc_rqst * rqstp, struct nfsd_fhandle      *argp,
 577                                             struct nfsd3_pathconfres *resp)
 578{
 579        __be32  nfserr;
 580
 581        dprintk("nfsd: PATHCONF(3) %s\n",
 582                                SVCFH_fmt(&argp->fh));
 583
 584        /* Set default pathconf */
 585        resp->p_link_max = 255;         /* at least */
 586        resp->p_name_max = 255;         /* at least */
 587        resp->p_no_trunc = 0;
 588        resp->p_chown_restricted = 1;
 589        resp->p_case_insensitive = 0;
 590        resp->p_case_preserving = 1;
 591
 592        nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
 593
 594        if (nfserr == 0) {
 595                struct super_block *sb = argp->fh.fh_dentry->d_inode->i_sb;
 596
 597                /* Note that we don't care for remote fs's here */
 598                switch (sb->s_magic) {
 599                case EXT2_SUPER_MAGIC:
 600                        resp->p_link_max = EXT2_LINK_MAX;
 601                        resp->p_name_max = EXT2_NAME_LEN;
 602                        break;
 603                case MSDOS_SUPER_MAGIC:
 604                        resp->p_case_insensitive = 1;
 605                        resp->p_case_preserving  = 0;
 606                        break;
 607                }
 608        }
 609
 610        fh_put(&argp->fh);
 611        RETURN_STATUS(nfserr);
 612}
 613
 614
 615/*
 616 * Commit a file (range) to stable storage.
 617 */
 618static __be32
 619nfsd3_proc_commit(struct svc_rqst * rqstp, struct nfsd3_commitargs *argp,
 620                                           struct nfsd3_commitres  *resp)
 621{
 622        __be32  nfserr;
 623
 624        dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
 625                                SVCFH_fmt(&argp->fh),
 626                                argp->count,
 627                                (unsigned long long) argp->offset);
 628
 629        if (argp->offset > NFS_OFFSET_MAX)
 630                RETURN_STATUS(nfserr_inval);
 631
 632        fh_copy(&resp->fh, &argp->fh);
 633        nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count);
 634
 635        RETURN_STATUS(nfserr);
 636}
 637
 638
 639/*
 640 * NFSv3 Server procedures.
 641 * Only the results of non-idempotent operations are cached.
 642 */
 643#define nfs3svc_decode_fhandleargs      nfs3svc_decode_fhandle
 644#define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
 645#define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
 646#define nfsd3_mkdirargs                 nfsd3_createargs
 647#define nfsd3_readdirplusargs           nfsd3_readdirargs
 648#define nfsd3_fhandleargs               nfsd_fhandle
 649#define nfsd3_fhandleres                nfsd3_attrstat
 650#define nfsd3_attrstatres               nfsd3_attrstat
 651#define nfsd3_wccstatres                nfsd3_attrstat
 652#define nfsd3_createres                 nfsd3_diropres
 653#define nfsd3_voidres                   nfsd3_voidargs
 654struct nfsd3_voidargs { int dummy; };
 655
 656#define PROC(name, argt, rest, relt, cache, respsize)   \
 657 { (svc_procfunc) nfsd3_proc_##name,            \
 658   (kxdrproc_t) nfs3svc_decode_##argt##args,    \
 659   (kxdrproc_t) nfs3svc_encode_##rest##res,     \
 660   (kxdrproc_t) nfs3svc_release_##relt,         \
 661   sizeof(struct nfsd3_##argt##args),           \
 662   sizeof(struct nfsd3_##rest##res),            \
 663   0,                                           \
 664   cache,                                       \
 665   respsize,                                    \
 666 }
 667
 668#define ST 1            /* status*/
 669#define FH 17           /* filehandle with length */
 670#define AT 21           /* attributes */
 671#define pAT (1+AT)      /* post attributes - conditional */
 672#define WC (7+pAT)      /* WCC attributes */
 673
 674static struct svc_procedure             nfsd_procedures3[22] = {
 675        [NFS3PROC_NULL] = {
 676                .pc_func = (svc_procfunc) nfsd3_proc_null,
 677                .pc_encode = (kxdrproc_t) nfs3svc_encode_voidres,
 678                .pc_argsize = sizeof(struct nfsd3_voidargs),
 679                .pc_ressize = sizeof(struct nfsd3_voidres),
 680                .pc_cachetype = RC_NOCACHE,
 681                .pc_xdrressize = ST,
 682        },
 683        [NFS3PROC_GETATTR] = {
 684                .pc_func = (svc_procfunc) nfsd3_proc_getattr,
 685                .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
 686                .pc_encode = (kxdrproc_t) nfs3svc_encode_attrstatres,
 687                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 688                .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 689                .pc_ressize = sizeof(struct nfsd3_attrstatres),
 690                .pc_cachetype = RC_NOCACHE,
 691                .pc_xdrressize = ST+AT,
 692        },
 693        [NFS3PROC_SETATTR] = {
 694                .pc_func = (svc_procfunc) nfsd3_proc_setattr,
 695                .pc_decode = (kxdrproc_t) nfs3svc_decode_sattrargs,
 696                .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
 697                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 698                .pc_argsize = sizeof(struct nfsd3_sattrargs),
 699                .pc_ressize = sizeof(struct nfsd3_wccstatres),
 700                .pc_cachetype = RC_REPLBUFF,
 701                .pc_xdrressize = ST+WC,
 702        },
 703        [NFS3PROC_LOOKUP] = {
 704                .pc_func = (svc_procfunc) nfsd3_proc_lookup,
 705                .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
 706                .pc_encode = (kxdrproc_t) nfs3svc_encode_diropres,
 707                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 708                .pc_argsize = sizeof(struct nfsd3_diropargs),
 709                .pc_ressize = sizeof(struct nfsd3_diropres),
 710                .pc_cachetype = RC_NOCACHE,
 711                .pc_xdrressize = ST+FH+pAT+pAT,
 712        },
 713        [NFS3PROC_ACCESS] = {
 714                .pc_func = (svc_procfunc) nfsd3_proc_access,
 715                .pc_decode = (kxdrproc_t) nfs3svc_decode_accessargs,
 716                .pc_encode = (kxdrproc_t) nfs3svc_encode_accessres,
 717                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 718                .pc_argsize = sizeof(struct nfsd3_accessargs),
 719                .pc_ressize = sizeof(struct nfsd3_accessres),
 720                .pc_cachetype = RC_NOCACHE,
 721                .pc_xdrressize = ST+pAT+1,
 722        },
 723        [NFS3PROC_READLINK] = {
 724                .pc_func = (svc_procfunc) nfsd3_proc_readlink,
 725                .pc_decode = (kxdrproc_t) nfs3svc_decode_readlinkargs,
 726                .pc_encode = (kxdrproc_t) nfs3svc_encode_readlinkres,
 727                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 728                .pc_argsize = sizeof(struct nfsd3_readlinkargs),
 729                .pc_ressize = sizeof(struct nfsd3_readlinkres),
 730                .pc_cachetype = RC_NOCACHE,
 731                .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
 732        },
 733        [NFS3PROC_READ] = {
 734                .pc_func = (svc_procfunc) nfsd3_proc_read,
 735                .pc_decode = (kxdrproc_t) nfs3svc_decode_readargs,
 736                .pc_encode = (kxdrproc_t) nfs3svc_encode_readres,
 737                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 738                .pc_argsize = sizeof(struct nfsd3_readargs),
 739                .pc_ressize = sizeof(struct nfsd3_readres),
 740                .pc_cachetype = RC_NOCACHE,
 741                .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
 742        },
 743        [NFS3PROC_WRITE] = {
 744                .pc_func = (svc_procfunc) nfsd3_proc_write,
 745                .pc_decode = (kxdrproc_t) nfs3svc_decode_writeargs,
 746                .pc_encode = (kxdrproc_t) nfs3svc_encode_writeres,
 747                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 748                .pc_argsize = sizeof(struct nfsd3_writeargs),
 749                .pc_ressize = sizeof(struct nfsd3_writeres),
 750                .pc_cachetype = RC_REPLBUFF,
 751                .pc_xdrressize = ST+WC+4,
 752        },
 753        [NFS3PROC_CREATE] = {
 754                .pc_func = (svc_procfunc) nfsd3_proc_create,
 755                .pc_decode = (kxdrproc_t) nfs3svc_decode_createargs,
 756                .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
 757                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 758                .pc_argsize = sizeof(struct nfsd3_createargs),
 759                .pc_ressize = sizeof(struct nfsd3_createres),
 760                .pc_cachetype = RC_REPLBUFF,
 761                .pc_xdrressize = ST+(1+FH+pAT)+WC,
 762        },
 763        [NFS3PROC_MKDIR] = {
 764                .pc_func = (svc_procfunc) nfsd3_proc_mkdir,
 765                .pc_decode = (kxdrproc_t) nfs3svc_decode_mkdirargs,
 766                .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
 767                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 768                .pc_argsize = sizeof(struct nfsd3_mkdirargs),
 769                .pc_ressize = sizeof(struct nfsd3_createres),
 770                .pc_cachetype = RC_REPLBUFF,
 771                .pc_xdrressize = ST+(1+FH+pAT)+WC,
 772        },
 773        [NFS3PROC_SYMLINK] = {
 774                .pc_func = (svc_procfunc) nfsd3_proc_symlink,
 775                .pc_decode = (kxdrproc_t) nfs3svc_decode_symlinkargs,
 776                .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
 777                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 778                .pc_argsize = sizeof(struct nfsd3_symlinkargs),
 779                .pc_ressize = sizeof(struct nfsd3_createres),
 780                .pc_cachetype = RC_REPLBUFF,
 781                .pc_xdrressize = ST+(1+FH+pAT)+WC,
 782        },
 783        [NFS3PROC_MKNOD] = {
 784                .pc_func = (svc_procfunc) nfsd3_proc_mknod,
 785                .pc_decode = (kxdrproc_t) nfs3svc_decode_mknodargs,
 786                .pc_encode = (kxdrproc_t) nfs3svc_encode_createres,
 787                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 788                .pc_argsize = sizeof(struct nfsd3_mknodargs),
 789                .pc_ressize = sizeof(struct nfsd3_createres),
 790                .pc_cachetype = RC_REPLBUFF,
 791                .pc_xdrressize = ST+(1+FH+pAT)+WC,
 792        },
 793        [NFS3PROC_REMOVE] = {
 794                .pc_func = (svc_procfunc) nfsd3_proc_remove,
 795                .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
 796                .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
 797                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 798                .pc_argsize = sizeof(struct nfsd3_diropargs),
 799                .pc_ressize = sizeof(struct nfsd3_wccstatres),
 800                .pc_cachetype = RC_REPLBUFF,
 801                .pc_xdrressize = ST+WC,
 802        },
 803        [NFS3PROC_RMDIR] = {
 804                .pc_func = (svc_procfunc) nfsd3_proc_rmdir,
 805                .pc_decode = (kxdrproc_t) nfs3svc_decode_diropargs,
 806                .pc_encode = (kxdrproc_t) nfs3svc_encode_wccstatres,
 807                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 808                .pc_argsize = sizeof(struct nfsd3_diropargs),
 809                .pc_ressize = sizeof(struct nfsd3_wccstatres),
 810                .pc_cachetype = RC_REPLBUFF,
 811                .pc_xdrressize = ST+WC,
 812        },
 813        [NFS3PROC_RENAME] = {
 814                .pc_func = (svc_procfunc) nfsd3_proc_rename,
 815                .pc_decode = (kxdrproc_t) nfs3svc_decode_renameargs,
 816                .pc_encode = (kxdrproc_t) nfs3svc_encode_renameres,
 817                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 818                .pc_argsize = sizeof(struct nfsd3_renameargs),
 819                .pc_ressize = sizeof(struct nfsd3_renameres),
 820                .pc_cachetype = RC_REPLBUFF,
 821                .pc_xdrressize = ST+WC+WC,
 822        },
 823        [NFS3PROC_LINK] = {
 824                .pc_func = (svc_procfunc) nfsd3_proc_link,
 825                .pc_decode = (kxdrproc_t) nfs3svc_decode_linkargs,
 826                .pc_encode = (kxdrproc_t) nfs3svc_encode_linkres,
 827                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle2,
 828                .pc_argsize = sizeof(struct nfsd3_linkargs),
 829                .pc_ressize = sizeof(struct nfsd3_linkres),
 830                .pc_cachetype = RC_REPLBUFF,
 831                .pc_xdrressize = ST+pAT+WC,
 832        },
 833        [NFS3PROC_READDIR] = {
 834                .pc_func = (svc_procfunc) nfsd3_proc_readdir,
 835                .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirargs,
 836                .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
 837                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 838                .pc_argsize = sizeof(struct nfsd3_readdirargs),
 839                .pc_ressize = sizeof(struct nfsd3_readdirres),
 840                .pc_cachetype = RC_NOCACHE,
 841        },
 842        [NFS3PROC_READDIRPLUS] = {
 843                .pc_func = (svc_procfunc) nfsd3_proc_readdirplus,
 844                .pc_decode = (kxdrproc_t) nfs3svc_decode_readdirplusargs,
 845                .pc_encode = (kxdrproc_t) nfs3svc_encode_readdirres,
 846                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 847                .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
 848                .pc_ressize = sizeof(struct nfsd3_readdirres),
 849                .pc_cachetype = RC_NOCACHE,
 850        },
 851        [NFS3PROC_FSSTAT] = {
 852                .pc_func = (svc_procfunc) nfsd3_proc_fsstat,
 853                .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
 854                .pc_encode = (kxdrproc_t) nfs3svc_encode_fsstatres,
 855                .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 856                .pc_ressize = sizeof(struct nfsd3_fsstatres),
 857                .pc_cachetype = RC_NOCACHE,
 858                .pc_xdrressize = ST+pAT+2*6+1,
 859        },
 860        [NFS3PROC_FSINFO] = {
 861                .pc_func = (svc_procfunc) nfsd3_proc_fsinfo,
 862                .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
 863                .pc_encode = (kxdrproc_t) nfs3svc_encode_fsinfores,
 864                .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 865                .pc_ressize = sizeof(struct nfsd3_fsinfores),
 866                .pc_cachetype = RC_NOCACHE,
 867                .pc_xdrressize = ST+pAT+12,
 868        },
 869        [NFS3PROC_PATHCONF] = {
 870                .pc_func = (svc_procfunc) nfsd3_proc_pathconf,
 871                .pc_decode = (kxdrproc_t) nfs3svc_decode_fhandleargs,
 872                .pc_encode = (kxdrproc_t) nfs3svc_encode_pathconfres,
 873                .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 874                .pc_ressize = sizeof(struct nfsd3_pathconfres),
 875                .pc_cachetype = RC_NOCACHE,
 876                .pc_xdrressize = ST+pAT+6,
 877        },
 878        [NFS3PROC_COMMIT] = {
 879                .pc_func = (svc_procfunc) nfsd3_proc_commit,
 880                .pc_decode = (kxdrproc_t) nfs3svc_decode_commitargs,
 881                .pc_encode = (kxdrproc_t) nfs3svc_encode_commitres,
 882                .pc_release = (kxdrproc_t) nfs3svc_release_fhandle,
 883                .pc_argsize = sizeof(struct nfsd3_commitargs),
 884                .pc_ressize = sizeof(struct nfsd3_commitres),
 885                .pc_cachetype = RC_NOCACHE,
 886                .pc_xdrressize = ST+WC+2,
 887        },
 888};
 889
 890struct svc_version      nfsd_version3 = {
 891                .vs_vers        = 3,
 892                .vs_nproc       = 22,
 893                .vs_proc        = nfsd_procedures3,
 894                .vs_dispatch    = nfsd_dispatch,
 895                .vs_xdrsize     = NFS3_SVC_XDRSIZE,
 896};
 897
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