linux/fs/nfsd/nfsproc.c
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   1/*
   2 * Process version 2 NFS requests.
   3 *
   4 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   5 */
   6
   7#include <linux/namei.h>
   8
   9#include "cache.h"
  10#include "xdr.h"
  11#include "vfs.h"
  12
  13typedef struct svc_rqst svc_rqst;
  14typedef struct svc_buf  svc_buf;
  15
  16#define NFSDDBG_FACILITY                NFSDDBG_PROC
  17
  18
  19static __be32
  20nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
  21{
  22        return nfs_ok;
  23}
  24
  25static __be32
  26nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
  27{
  28        if (err) return err;
  29        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
  30                                    resp->fh.fh_dentry,
  31                                    &resp->stat));
  32}
  33static __be32
  34nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
  35{
  36        if (err) return err;
  37        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
  38                                    resp->fh.fh_dentry,
  39                                    &resp->stat));
  40}
  41/*
  42 * Get a file's attributes
  43 * N.B. After this call resp->fh needs an fh_put
  44 */
  45static __be32
  46nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
  47                                          struct nfsd_attrstat *resp)
  48{
  49        __be32 nfserr;
  50        dprintk("nfsd: GETATTR  %s\n", 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        return nfsd_return_attrs(nfserr, resp);
  56}
  57
  58/*
  59 * Set a file's attributes
  60 * N.B. After this call resp->fh needs an fh_put
  61 */
  62static __be32
  63nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
  64                                          struct nfsd_attrstat  *resp)
  65{
  66        __be32 nfserr;
  67        dprintk("nfsd: SETATTR  %s, valid=%x, size=%ld\n",
  68                SVCFH_fmt(&argp->fh),
  69                argp->attrs.ia_valid, (long) argp->attrs.ia_size);
  70
  71        fh_copy(&resp->fh, &argp->fh);
  72        nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
  73        return nfsd_return_attrs(nfserr, resp);
  74}
  75
  76/*
  77 * Look up a path name component
  78 * Note: the dentry in the resp->fh may be negative if the file
  79 * doesn't exist yet.
  80 * N.B. After this call resp->fh needs an fh_put
  81 */
  82static __be32
  83nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
  84                                         struct nfsd_diropres  *resp)
  85{
  86        __be32  nfserr;
  87
  88        dprintk("nfsd: LOOKUP   %s %.*s\n",
  89                SVCFH_fmt(&argp->fh), argp->len, argp->name);
  90
  91        fh_init(&resp->fh, NFS_FHSIZE);
  92        nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
  93                                 &resp->fh);
  94
  95        fh_put(&argp->fh);
  96        return nfsd_return_dirop(nfserr, resp);
  97}
  98
  99/*
 100 * Read a symlink.
 101 */
 102static __be32
 103nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
 104                                           struct nfsd_readlinkres *resp)
 105{
 106        __be32  nfserr;
 107
 108        dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
 109
 110        /* Read the symlink. */
 111        resp->len = NFS_MAXPATHLEN;
 112        nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
 113
 114        fh_put(&argp->fh);
 115        return nfserr;
 116}
 117
 118/*
 119 * Read a portion of a file.
 120 * N.B. After this call resp->fh needs an fh_put
 121 */
 122static __be32
 123nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
 124                                       struct nfsd_readres  *resp)
 125{
 126        __be32  nfserr;
 127
 128        dprintk("nfsd: READ    %s %d bytes at %d\n",
 129                SVCFH_fmt(&argp->fh),
 130                argp->count, argp->offset);
 131
 132        /* Obtain buffer pointer for payload. 19 is 1 word for
 133         * status, 17 words for fattr, and 1 word for the byte count.
 134         */
 135
 136        if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
 137                char buf[RPC_MAX_ADDRBUFLEN];
 138                printk(KERN_NOTICE
 139                        "oversized read request from %s (%d bytes)\n",
 140                                svc_print_addr(rqstp, buf, sizeof(buf)),
 141                                argp->count);
 142                argp->count = NFSSVC_MAXBLKSIZE_V2;
 143        }
 144        svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
 145
 146        resp->count = argp->count;
 147        nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
 148                                  argp->offset,
 149                                  rqstp->rq_vec, argp->vlen,
 150                                  &resp->count);
 151
 152        if (nfserr) return nfserr;
 153        return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
 154                                    resp->fh.fh_dentry,
 155                                    &resp->stat));
 156}
 157
 158/*
 159 * Write data to a file
 160 * N.B. After this call resp->fh needs an fh_put
 161 */
 162static __be32
 163nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
 164                                        struct nfsd_attrstat  *resp)
 165{
 166        __be32  nfserr;
 167        int     stable = 1;
 168        unsigned long cnt = argp->len;
 169
 170        dprintk("nfsd: WRITE    %s %d bytes at %d\n",
 171                SVCFH_fmt(&argp->fh),
 172                argp->len, argp->offset);
 173
 174        nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
 175                                   argp->offset,
 176                                   rqstp->rq_vec, argp->vlen,
 177                                   &cnt,
 178                                   &stable);
 179        return nfsd_return_attrs(nfserr, resp);
 180}
 181
 182/*
 183 * CREATE processing is complicated. The keyword here is `overloaded.'
 184 * The parent directory is kept locked between the check for existence
 185 * and the actual create() call in compliance with VFS protocols.
 186 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
 187 */
 188static __be32
 189nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 190                                         struct nfsd_diropres   *resp)
 191{
 192        svc_fh          *dirfhp = &argp->fh;
 193        svc_fh          *newfhp = &resp->fh;
 194        struct iattr    *attr = &argp->attrs;
 195        struct inode    *inode;
 196        struct dentry   *dchild;
 197        int             type, mode;
 198        __be32          nfserr;
 199        int             hosterr;
 200        dev_t           rdev = 0, wanted = new_decode_dev(attr->ia_size);
 201
 202        dprintk("nfsd: CREATE   %s %.*s\n",
 203                SVCFH_fmt(dirfhp), argp->len, argp->name);
 204
 205        /* First verify the parent file handle */
 206        nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
 207        if (nfserr)
 208                goto done; /* must fh_put dirfhp even on error */
 209
 210        /* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
 211
 212        nfserr = nfserr_acces;
 213        if (!argp->len)
 214                goto done;
 215        nfserr = nfserr_exist;
 216        if (isdotent(argp->name, argp->len))
 217                goto done;
 218        hosterr = fh_want_write(dirfhp);
 219        if (hosterr) {
 220                nfserr = nfserrno(hosterr);
 221                goto done;
 222        }
 223
 224        fh_lock_nested(dirfhp, I_MUTEX_PARENT);
 225        dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
 226        if (IS_ERR(dchild)) {
 227                nfserr = nfserrno(PTR_ERR(dchild));
 228                goto out_unlock;
 229        }
 230        fh_init(newfhp, NFS_FHSIZE);
 231        nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
 232        if (!nfserr && !dchild->d_inode)
 233                nfserr = nfserr_noent;
 234        dput(dchild);
 235        if (nfserr) {
 236                if (nfserr != nfserr_noent)
 237                        goto out_unlock;
 238                /*
 239                 * If the new file handle wasn't verified, we can't tell
 240                 * whether the file exists or not. Time to bail ...
 241                 */
 242                nfserr = nfserr_acces;
 243                if (!newfhp->fh_dentry) {
 244                        printk(KERN_WARNING 
 245                                "nfsd_proc_create: file handle not verified\n");
 246                        goto out_unlock;
 247                }
 248        }
 249
 250        inode = newfhp->fh_dentry->d_inode;
 251
 252        /* Unfudge the mode bits */
 253        if (attr->ia_valid & ATTR_MODE) {
 254                type = attr->ia_mode & S_IFMT;
 255                mode = attr->ia_mode & ~S_IFMT;
 256                if (!type) {
 257                        /* no type, so if target exists, assume same as that,
 258                         * else assume a file */
 259                        if (inode) {
 260                                type = inode->i_mode & S_IFMT;
 261                                switch(type) {
 262                                case S_IFCHR:
 263                                case S_IFBLK:
 264                                        /* reserve rdev for later checking */
 265                                        rdev = inode->i_rdev;
 266                                        attr->ia_valid |= ATTR_SIZE;
 267
 268                                        /* FALLTHROUGH */
 269                                case S_IFIFO:
 270                                        /* this is probably a permission check..
 271                                         * at least IRIX implements perm checking on
 272                                         *   echo thing > device-special-file-or-pipe
 273                                         * by doing a CREATE with type==0
 274                                         */
 275                                        nfserr = nfsd_permission(rqstp,
 276                                                                 newfhp->fh_export,
 277                                                                 newfhp->fh_dentry,
 278                                                                 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
 279                                        if (nfserr && nfserr != nfserr_rofs)
 280                                                goto out_unlock;
 281                                }
 282                        } else
 283                                type = S_IFREG;
 284                }
 285        } else if (inode) {
 286                type = inode->i_mode & S_IFMT;
 287                mode = inode->i_mode & ~S_IFMT;
 288        } else {
 289                type = S_IFREG;
 290                mode = 0;       /* ??? */
 291        }
 292
 293        attr->ia_valid |= ATTR_MODE;
 294        attr->ia_mode = mode;
 295
 296        /* Special treatment for non-regular files according to the
 297         * gospel of sun micro
 298         */
 299        if (type != S_IFREG) {
 300                if (type != S_IFBLK && type != S_IFCHR) {
 301                        rdev = 0;
 302                } else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
 303                        /* If you think you've seen the worst, grok this. */
 304                        type = S_IFIFO;
 305                } else {
 306                        /* Okay, char or block special */
 307                        if (!rdev)
 308                                rdev = wanted;
 309                }
 310
 311                /* we've used the SIZE information, so discard it */
 312                attr->ia_valid &= ~ATTR_SIZE;
 313
 314                /* Make sure the type and device matches */
 315                nfserr = nfserr_exist;
 316                if (inode && type != (inode->i_mode & S_IFMT))
 317                        goto out_unlock;
 318        }
 319
 320        nfserr = 0;
 321        if (!inode) {
 322                /* File doesn't exist. Create it and set attrs */
 323                nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 324                                        attr, type, rdev, newfhp);
 325        } else if (type == S_IFREG) {
 326                dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
 327                        argp->name, attr->ia_valid, (long) attr->ia_size);
 328                /* File already exists. We ignore all attributes except
 329                 * size, so that creat() behaves exactly like
 330                 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
 331                 */
 332                attr->ia_valid &= ATTR_SIZE;
 333                if (attr->ia_valid)
 334                        nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
 335        }
 336
 337out_unlock:
 338        /* We don't really need to unlock, as fh_put does it. */
 339        fh_unlock(dirfhp);
 340        fh_drop_write(dirfhp);
 341done:
 342        fh_put(dirfhp);
 343        return nfsd_return_dirop(nfserr, resp);
 344}
 345
 346static __be32
 347nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 348                                         void                  *resp)
 349{
 350        __be32  nfserr;
 351
 352        dprintk("nfsd: REMOVE   %s %.*s\n", SVCFH_fmt(&argp->fh),
 353                argp->len, argp->name);
 354
 355        /* Unlink. -SIFDIR means file must not be a directory */
 356        nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
 357        fh_put(&argp->fh);
 358        return nfserr;
 359}
 360
 361static __be32
 362nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
 363                                         void                   *resp)
 364{
 365        __be32  nfserr;
 366
 367        dprintk("nfsd: RENAME   %s %.*s -> \n",
 368                SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
 369        dprintk("nfsd:        ->  %s %.*s\n",
 370                SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
 371
 372        nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
 373                                    &argp->tfh, argp->tname, argp->tlen);
 374        fh_put(&argp->ffh);
 375        fh_put(&argp->tfh);
 376        return nfserr;
 377}
 378
 379static __be32
 380nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
 381                                void                        *resp)
 382{
 383        __be32  nfserr;
 384
 385        dprintk("nfsd: LINK     %s ->\n",
 386                SVCFH_fmt(&argp->ffh));
 387        dprintk("nfsd:    %s %.*s\n",
 388                SVCFH_fmt(&argp->tfh),
 389                argp->tlen,
 390                argp->tname);
 391
 392        nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
 393                                  &argp->ffh);
 394        fh_put(&argp->ffh);
 395        fh_put(&argp->tfh);
 396        return nfserr;
 397}
 398
 399static __be32
 400nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
 401                                          void                    *resp)
 402{
 403        struct svc_fh   newfh;
 404        __be32          nfserr;
 405
 406        dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
 407                SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
 408                argp->tlen, argp->tname);
 409
 410        fh_init(&newfh, NFS_FHSIZE);
 411        /*
 412         * Create the link, look up new file and set attrs.
 413         */
 414        nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
 415                                                 argp->tname, argp->tlen,
 416                                                 &newfh, &argp->attrs);
 417
 418
 419        fh_put(&argp->ffh);
 420        fh_put(&newfh);
 421        return nfserr;
 422}
 423
 424/*
 425 * Make directory. This operation is not idempotent.
 426 * N.B. After this call resp->fh needs an fh_put
 427 */
 428static __be32
 429nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
 430                                        struct nfsd_diropres   *resp)
 431{
 432        __be32  nfserr;
 433
 434        dprintk("nfsd: MKDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 435
 436        if (resp->fh.fh_dentry) {
 437                printk(KERN_WARNING
 438                        "nfsd_proc_mkdir: response already verified??\n");
 439        }
 440
 441        argp->attrs.ia_valid &= ~ATTR_SIZE;
 442        fh_init(&resp->fh, NFS_FHSIZE);
 443        nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
 444                                    &argp->attrs, S_IFDIR, 0, &resp->fh);
 445        fh_put(&argp->fh);
 446        return nfsd_return_dirop(nfserr, resp);
 447}
 448
 449/*
 450 * Remove a directory
 451 */
 452static __be32
 453nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
 454                                        void                  *resp)
 455{
 456        __be32  nfserr;
 457
 458        dprintk("nfsd: RMDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
 459
 460        nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
 461        fh_put(&argp->fh);
 462        return nfserr;
 463}
 464
 465/*
 466 * Read a portion of a directory.
 467 */
 468static __be32
 469nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
 470                                          struct nfsd_readdirres  *resp)
 471{
 472        int             count;
 473        __be32          nfserr;
 474        loff_t          offset;
 475
 476        dprintk("nfsd: READDIR  %s %d bytes at %d\n",
 477                SVCFH_fmt(&argp->fh),           
 478                argp->count, argp->cookie);
 479
 480        /* Shrink to the client read size */
 481        count = (argp->count >> 2) - 2;
 482
 483        /* Make sure we've room for the NULL ptr & eof flag */
 484        count -= 2;
 485        if (count < 0)
 486                count = 0;
 487
 488        resp->buffer = argp->buffer;
 489        resp->offset = NULL;
 490        resp->buflen = count;
 491        resp->common.err = nfs_ok;
 492        /* Read directory and encode entries on the fly */
 493        offset = argp->cookie;
 494        nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, 
 495                              &resp->common, nfssvc_encode_entry);
 496
 497        resp->count = resp->buffer - argp->buffer;
 498        if (resp->offset)
 499                *resp->offset = htonl(offset);
 500
 501        fh_put(&argp->fh);
 502        return nfserr;
 503}
 504
 505/*
 506 * Get file system info
 507 */
 508static __be32
 509nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
 510                                          struct nfsd_statfsres *resp)
 511{
 512        __be32  nfserr;
 513
 514        dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));
 515
 516        nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
 517                        NFSD_MAY_BYPASS_GSS_ON_ROOT);
 518        fh_put(&argp->fh);
 519        return nfserr;
 520}
 521
 522/*
 523 * NFSv2 Server procedures.
 524 * Only the results of non-idempotent operations are cached.
 525 */
 526struct nfsd_void { int dummy; };
 527
 528#define ST 1            /* status */
 529#define FH 8            /* filehandle */
 530#define AT 18           /* attributes */
 531
 532static struct svc_procedure             nfsd_procedures2[18] = {
 533        [NFSPROC_NULL] = {
 534                .pc_func = (svc_procfunc) nfsd_proc_null,
 535                .pc_decode = (kxdrproc_t) nfssvc_decode_void,
 536                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 537                .pc_argsize = sizeof(struct nfsd_void),
 538                .pc_ressize = sizeof(struct nfsd_void),
 539                .pc_cachetype = RC_NOCACHE,
 540                .pc_xdrressize = ST,
 541        },
 542        [NFSPROC_GETATTR] = {
 543                .pc_func = (svc_procfunc) nfsd_proc_getattr,
 544                .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
 545                .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
 546                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 547                .pc_argsize = sizeof(struct nfsd_fhandle),
 548                .pc_ressize = sizeof(struct nfsd_attrstat),
 549                .pc_cachetype = RC_NOCACHE,
 550                .pc_xdrressize = ST+AT,
 551        },
 552        [NFSPROC_SETATTR] = {
 553                .pc_func = (svc_procfunc) nfsd_proc_setattr,
 554                .pc_decode = (kxdrproc_t) nfssvc_decode_sattrargs,
 555                .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
 556                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 557                .pc_argsize = sizeof(struct nfsd_sattrargs),
 558                .pc_ressize = sizeof(struct nfsd_attrstat),
 559                .pc_cachetype = RC_REPLBUFF,
 560                .pc_xdrressize = ST+AT,
 561        },
 562        [NFSPROC_ROOT] = {
 563                .pc_decode = (kxdrproc_t) nfssvc_decode_void,
 564                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 565                .pc_argsize = sizeof(struct nfsd_void),
 566                .pc_ressize = sizeof(struct nfsd_void),
 567                .pc_cachetype = RC_NOCACHE,
 568                .pc_xdrressize = ST,
 569        },
 570        [NFSPROC_LOOKUP] = {
 571                .pc_func = (svc_procfunc) nfsd_proc_lookup,
 572                .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
 573                .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
 574                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 575                .pc_argsize = sizeof(struct nfsd_diropargs),
 576                .pc_ressize = sizeof(struct nfsd_diropres),
 577                .pc_cachetype = RC_NOCACHE,
 578                .pc_xdrressize = ST+FH+AT,
 579        },
 580        [NFSPROC_READLINK] = {
 581                .pc_func = (svc_procfunc) nfsd_proc_readlink,
 582                .pc_decode = (kxdrproc_t) nfssvc_decode_readlinkargs,
 583                .pc_encode = (kxdrproc_t) nfssvc_encode_readlinkres,
 584                .pc_argsize = sizeof(struct nfsd_readlinkargs),
 585                .pc_ressize = sizeof(struct nfsd_readlinkres),
 586                .pc_cachetype = RC_NOCACHE,
 587                .pc_xdrressize = ST+1+NFS_MAXPATHLEN/4,
 588        },
 589        [NFSPROC_READ] = {
 590                .pc_func = (svc_procfunc) nfsd_proc_read,
 591                .pc_decode = (kxdrproc_t) nfssvc_decode_readargs,
 592                .pc_encode = (kxdrproc_t) nfssvc_encode_readres,
 593                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 594                .pc_argsize = sizeof(struct nfsd_readargs),
 595                .pc_ressize = sizeof(struct nfsd_readres),
 596                .pc_cachetype = RC_NOCACHE,
 597                .pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4,
 598        },
 599        [NFSPROC_WRITECACHE] = {
 600                .pc_decode = (kxdrproc_t) nfssvc_decode_void,
 601                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 602                .pc_argsize = sizeof(struct nfsd_void),
 603                .pc_ressize = sizeof(struct nfsd_void),
 604                .pc_cachetype = RC_NOCACHE,
 605                .pc_xdrressize = ST,
 606        },
 607        [NFSPROC_WRITE] = {
 608                .pc_func = (svc_procfunc) nfsd_proc_write,
 609                .pc_decode = (kxdrproc_t) nfssvc_decode_writeargs,
 610                .pc_encode = (kxdrproc_t) nfssvc_encode_attrstat,
 611                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 612                .pc_argsize = sizeof(struct nfsd_writeargs),
 613                .pc_ressize = sizeof(struct nfsd_attrstat),
 614                .pc_cachetype = RC_REPLBUFF,
 615                .pc_xdrressize = ST+AT,
 616        },
 617        [NFSPROC_CREATE] = {
 618                .pc_func = (svc_procfunc) nfsd_proc_create,
 619                .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
 620                .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
 621                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 622                .pc_argsize = sizeof(struct nfsd_createargs),
 623                .pc_ressize = sizeof(struct nfsd_diropres),
 624                .pc_cachetype = RC_REPLBUFF,
 625                .pc_xdrressize = ST+FH+AT,
 626        },
 627        [NFSPROC_REMOVE] = {
 628                .pc_func = (svc_procfunc) nfsd_proc_remove,
 629                .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
 630                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 631                .pc_argsize = sizeof(struct nfsd_diropargs),
 632                .pc_ressize = sizeof(struct nfsd_void),
 633                .pc_cachetype = RC_REPLSTAT,
 634                .pc_xdrressize = ST,
 635        },
 636        [NFSPROC_RENAME] = {
 637                .pc_func = (svc_procfunc) nfsd_proc_rename,
 638                .pc_decode = (kxdrproc_t) nfssvc_decode_renameargs,
 639                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 640                .pc_argsize = sizeof(struct nfsd_renameargs),
 641                .pc_ressize = sizeof(struct nfsd_void),
 642                .pc_cachetype = RC_REPLSTAT,
 643                .pc_xdrressize = ST,
 644        },
 645        [NFSPROC_LINK] = {
 646                .pc_func = (svc_procfunc) nfsd_proc_link,
 647                .pc_decode = (kxdrproc_t) nfssvc_decode_linkargs,
 648                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 649                .pc_argsize = sizeof(struct nfsd_linkargs),
 650                .pc_ressize = sizeof(struct nfsd_void),
 651                .pc_cachetype = RC_REPLSTAT,
 652                .pc_xdrressize = ST,
 653        },
 654        [NFSPROC_SYMLINK] = {
 655                .pc_func = (svc_procfunc) nfsd_proc_symlink,
 656                .pc_decode = (kxdrproc_t) nfssvc_decode_symlinkargs,
 657                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 658                .pc_argsize = sizeof(struct nfsd_symlinkargs),
 659                .pc_ressize = sizeof(struct nfsd_void),
 660                .pc_cachetype = RC_REPLSTAT,
 661                .pc_xdrressize = ST,
 662        },
 663        [NFSPROC_MKDIR] = {
 664                .pc_func = (svc_procfunc) nfsd_proc_mkdir,
 665                .pc_decode = (kxdrproc_t) nfssvc_decode_createargs,
 666                .pc_encode = (kxdrproc_t) nfssvc_encode_diropres,
 667                .pc_release = (kxdrproc_t) nfssvc_release_fhandle,
 668                .pc_argsize = sizeof(struct nfsd_createargs),
 669                .pc_ressize = sizeof(struct nfsd_diropres),
 670                .pc_cachetype = RC_REPLBUFF,
 671                .pc_xdrressize = ST+FH+AT,
 672        },
 673        [NFSPROC_RMDIR] = {
 674                .pc_func = (svc_procfunc) nfsd_proc_rmdir,
 675                .pc_decode = (kxdrproc_t) nfssvc_decode_diropargs,
 676                .pc_encode = (kxdrproc_t) nfssvc_encode_void,
 677                .pc_argsize = sizeof(struct nfsd_diropargs),
 678                .pc_ressize = sizeof(struct nfsd_void),
 679                .pc_cachetype = RC_REPLSTAT,
 680                .pc_xdrressize = ST,
 681        },
 682        [NFSPROC_READDIR] = {
 683                .pc_func = (svc_procfunc) nfsd_proc_readdir,
 684                .pc_decode = (kxdrproc_t) nfssvc_decode_readdirargs,
 685                .pc_encode = (kxdrproc_t) nfssvc_encode_readdirres,
 686                .pc_argsize = sizeof(struct nfsd_readdirargs),
 687                .pc_ressize = sizeof(struct nfsd_readdirres),
 688                .pc_cachetype = RC_NOCACHE,
 689        },
 690        [NFSPROC_STATFS] = {
 691                .pc_func = (svc_procfunc) nfsd_proc_statfs,
 692                .pc_decode = (kxdrproc_t) nfssvc_decode_fhandle,
 693                .pc_encode = (kxdrproc_t) nfssvc_encode_statfsres,
 694                .pc_argsize = sizeof(struct nfsd_fhandle),
 695                .pc_ressize = sizeof(struct nfsd_statfsres),
 696                .pc_cachetype = RC_NOCACHE,
 697                .pc_xdrressize = ST+5,
 698        },
 699};
 700
 701
 702struct svc_version      nfsd_version2 = {
 703                .vs_vers        = 2,
 704                .vs_nproc       = 18,
 705                .vs_proc        = nfsd_procedures2,
 706                .vs_dispatch    = nfsd_dispatch,
 707                .vs_xdrsize     = NFS2_SVC_XDRSIZE,
 708};
 709
 710/*
 711 * Map errnos to NFS errnos.
 712 */
 713__be32
 714nfserrno (int errno)
 715{
 716        static struct {
 717                __be32  nfserr;
 718                int     syserr;
 719        } nfs_errtbl[] = {
 720                { nfs_ok, 0 },
 721                { nfserr_perm, -EPERM },
 722                { nfserr_noent, -ENOENT },
 723                { nfserr_io, -EIO },
 724                { nfserr_nxio, -ENXIO },
 725                { nfserr_acces, -EACCES },
 726                { nfserr_exist, -EEXIST },
 727                { nfserr_xdev, -EXDEV },
 728                { nfserr_mlink, -EMLINK },
 729                { nfserr_nodev, -ENODEV },
 730                { nfserr_notdir, -ENOTDIR },
 731                { nfserr_isdir, -EISDIR },
 732                { nfserr_inval, -EINVAL },
 733                { nfserr_fbig, -EFBIG },
 734                { nfserr_nospc, -ENOSPC },
 735                { nfserr_rofs, -EROFS },
 736                { nfserr_mlink, -EMLINK },
 737                { nfserr_nametoolong, -ENAMETOOLONG },
 738                { nfserr_notempty, -ENOTEMPTY },
 739#ifdef EDQUOT
 740                { nfserr_dquot, -EDQUOT },
 741#endif
 742                { nfserr_stale, -ESTALE },
 743                { nfserr_jukebox, -ETIMEDOUT },
 744                { nfserr_jukebox, -ERESTARTSYS },
 745                { nfserr_jukebox, -EAGAIN },
 746                { nfserr_jukebox, -EWOULDBLOCK },
 747                { nfserr_jukebox, -ENOMEM },
 748                { nfserr_io, -ETXTBSY },
 749                { nfserr_notsupp, -EOPNOTSUPP },
 750                { nfserr_toosmall, -ETOOSMALL },
 751                { nfserr_serverfault, -ESERVERFAULT },
 752        };
 753        int     i;
 754
 755        for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
 756                if (nfs_errtbl[i].syserr == errno)
 757                        return nfs_errtbl[i].nfserr;
 758        }
 759        printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
 760        return nfserr_io;
 761}
 762
 763
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