fs/nfsd/nfs3proc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Process version 3 NFS requests.
   4  *
   5  * Copyright (C) 1996, 1997, 1998 Olaf Kirch <[email protected]>
   6  */
   7
   8 #include <linux/fs.h>
   9 #include <linux/ext2_fs.h>
  10 #include <linux/magic.h>
  11
  12 #include "cache.h"
  13 #include "xdr3.h"
  14 #include "vfs.h"
  15
  16 #define NFSDDBG_FACILITY                NFSDDBG_PROC
  17
  18 static int      nfs3_ftypes[] = {
  19         0,                      /* NF3NON */
  20         S_IFREG,                /* NF3REG */
  21         S_IFDIR,                /* NF3DIR */
  22         S_IFBLK,                /* NF3BLK */
  23         S_IFCHR,                /* NF3CHR */
  24         S_IFLNK,                /* NF3LNK */
  25         S_IFSOCK,               /* NF3SOCK */
  26         S_IFIFO,                /* NF3FIFO */
  27 };
  28
  29 /*
  30  * NULL call.
  31  */
  32 static __be32
  33 nfsd3_proc_null(struct svc_rqst *rqstp)
  34 {
  35         return rpc_success;
  36 }
  37
  38 /*
  39  * Get a file's attributes
  40  */
  41 static __be32
  42 nfsd3_proc_getattr(struct svc_rqst *rqstp)
  43 {
  44         struct nfsd_fhandle *argp = rqstp->rq_argp;
  45         struct nfsd3_attrstat *resp = rqstp->rq_resp;
  46
  47         dprintk("nfsd: GETATTR(3)  %s\n",
  48                 SVCFH_fmt(&argp->fh));
  49
  50         fh_copy(&resp->fh, &argp->fh);
  51         resp->status = fh_verify(rqstp, &resp->fh, 0,
  52                                  NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
  53         if (resp->status != nfs_ok)
  54                 goto out;
  55
  56         resp->status = fh_getattr(&resp->fh, &resp->stat);
  57 out:
  58         return rpc_success;
  59 }
  60
  61 /*
  62  * Set a file's attributes
  63  */
  64 static __be32
  65 nfsd3_proc_setattr(struct svc_rqst *rqstp)
  66 {
  67         struct nfsd3_sattrargs *argp = rqstp->rq_argp;
  68         struct nfsd3_attrstat *resp = rqstp->rq_resp;
  69
  70         dprintk("nfsd: SETATTR(3)  %s\n",
  71                                 SVCFH_fmt(&argp->fh));
  72
  73         fh_copy(&resp->fh, &argp->fh);
  74         resp->status = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
  75                                     argp->check_guard, argp->guardtime);
  76         return rpc_success;
  77 }
  78
  79 /*
  80  * Look up a path name component
  81  */
  82 static __be32
  83 nfsd3_proc_lookup(struct svc_rqst *rqstp)
  84 {
  85         struct nfsd3_diropargs *argp = rqstp->rq_argp;
  86         struct nfsd3_diropres  *resp = rqstp->rq_resp;
  87
  88         dprintk("nfsd: LOOKUP(3)   %s %.*s\n",
  89                                 SVCFH_fmt(&argp->fh),
  90                                 argp->len,
  91                                 argp->name);
  92
  93         fh_copy(&resp->dirfh, &argp->fh);
  94         fh_init(&resp->fh, NFS3_FHSIZE);
  95
  96         resp->status = nfsd_lookup(rqstp, &resp->dirfh,
  97                                    argp->name, argp->len,
  98                                    &resp->fh);
  99         return rpc_success;
 100 }
 101
 102 /*
 103  * Check file access
 104  */
 105 static __be32
 106 nfsd3_proc_access(struct svc_rqst *rqstp)
 107 {
 108         struct nfsd3_accessargs *argp = rqstp->rq_argp;
 109         struct nfsd3_accessres *resp = rqstp->rq_resp;
 110
 111         dprintk("nfsd: ACCESS(3)   %s 0x%x\n",
 112                                 SVCFH_fmt(&argp->fh),
 113                                 argp->access);
 114
 115         fh_copy(&resp->fh, &argp->fh);
 116         resp->access = argp->access;
 117         resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
 118         return rpc_success;
 119 }
 120
 121 /*
 122  * Read a symlink.
 123  */
 124 static __be32
 125 nfsd3_proc_readlink(struct svc_rqst *rqstp)
 126 {
 127         struct nfsd_fhandle *argp = rqstp->rq_argp;
 128         struct nfsd3_readlinkres *resp = rqstp->rq_resp;
 129
 130         dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
 131
 132         /* Read the symlink. */
 133         fh_copy(&resp->fh, &argp->fh);
 134         resp->len = NFS3_MAXPATHLEN;
 135         resp->pages = rqstp->rq_next_page++;
 136         resp->status = nfsd_readlink(rqstp, &resp->fh,
 137                                      page_address(*resp->pages), &resp->len);
 138         return rpc_success;
 139 }
 140
 141 /*
 142  * Read a portion of a file.
 143  */
 144 static __be32
 145 nfsd3_proc_read(struct svc_rqst *rqstp)
 146 {
 147         struct nfsd3_readargs *argp = rqstp->rq_argp;
 148         struct nfsd3_readres *resp = rqstp->rq_resp;
 149         u32 max_blocksize = svc_max_payload(rqstp);
 150         unsigned int len;
 151         int v;
 152
 153         dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
 154                                 SVCFH_fmt(&argp->fh),
 155                                 (unsigned long) argp->count,
 156                                 (unsigned long long) argp->offset);
 157
 158         argp->count = min_t(u32, argp->count, max_blocksize);
 159         if (argp->offset > (u64)OFFSET_MAX)
 160                 argp->offset = (u64)OFFSET_MAX;
 161         if (argp->offset + argp->count > (u64)OFFSET_MAX)
 162                 argp->count = (u64)OFFSET_MAX - argp->offset;
 163
 164         v = 0;
 165         len = argp->count;
 166         resp->pages = rqstp->rq_next_page;
 167         while (len > 0) {
 168                 struct page *page = *(rqstp->rq_next_page++);
 169
 170                 rqstp->rq_vec[v].iov_base = page_address(page);
 171                 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
 172                 len -= rqstp->rq_vec[v].iov_len;
 173                 v++;
 174         }
 175
 176         /* Obtain buffer pointer for payload.
 177          * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
 178          * + 1 (xdr opaque byte count) = 26
 179          */
 180         resp->count = argp->count;
 181         svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
 182
 183         fh_copy(&resp->fh, &argp->fh);
 184         resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
 185                                  rqstp->rq_vec, v, &resp->count, &resp->eof);
 186         return rpc_success;
 187 }
 188
 189 /*
 190  * Write data to a file
 191  */
 192 static __be32
 193 nfsd3_proc_write(struct svc_rqst *rqstp)
 194 {
 195         struct nfsd3_writeargs *argp = rqstp->rq_argp;
 196         struct nfsd3_writeres *resp = rqstp->rq_resp;
 197         unsigned long cnt = argp->len;
 198         unsigned int nvecs;
 199
 200         dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
 201                                 SVCFH_fmt(&argp->fh),
 202                                 argp->len,
 203                                 (unsigned long long) argp->offset,
 204                                 argp->stable? " stable" : "");
 205
 206         resp->status = nfserr_fbig;
 207         if (argp->offset > (u64)OFFSET_MAX ||
 208             argp->offset + argp->len > (u64)OFFSET_MAX)
 209                 return rpc_success;
 210
 211         fh_copy(&resp->fh, &argp->fh);
 212         resp->committed = argp->stable;
 213         nvecs = svc_fill_write_vector(rqstp, &argp->payload);
 214
 215         resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
 216                                   rqstp->rq_vec, nvecs, &cnt,
 217                                   resp->committed, resp->verf);
 218         resp->count = cnt;
 219         return rpc_success;
 220 }
 221
 222 /*
 223  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
 224  * At least in theory; we'll see how it fares in practice when the
 225  * first reports about SunOS compatibility problems start to pour in...
 226  */
 227 static __be32
 228 nfsd3_proc_create(struct svc_rqst *rqstp)
 229 {
 230         struct nfsd3_createargs *argp = rqstp->rq_argp;
 231         struct nfsd3_diropres *resp = rqstp->rq_resp;
 232         svc_fh          *dirfhp, *newfhp = NULL;
 233         struct iattr    *attr;
 234
 235         dprintk("nfsd: CREATE(3)   %s %.*s\n",
 236                                 SVCFH_fmt(&argp->fh),
 237                                 argp->len,
 238                                 argp->name);
 239
 240         dirfhp = fh_copy(&resp->dirfh, &argp->fh);
 241         newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
 242         attr   = &argp->attrs;
 243
 244         /* Unfudge the mode bits */
 245         attr->ia_mode &= ~S_IFMT;
 246         if (!(attr->ia_valid & ATTR_MODE)) {
 247                 attr->ia_valid |= ATTR_MODE;
 248                 attr->ia_mode = S_IFREG;
 249         } else {
 250                 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
 251         }
 252
 253         /* Now create the file and set attributes */
 254         resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 255                                       attr, newfhp, argp->createmode,
 256                                       (u32 *)argp->verf, NULL, NULL);
 257         return rpc_success;
 258 }
 259
 260 /*
 261  * Make directory. This operation is not idempotent.
 262  */
 263 static __be32
 264 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
 265 {
 266         struct nfsd3_createargs *argp = rqstp->rq_argp;
 267         struct nfsd3_diropres *resp = rqstp->rq_resp;
 268
 269         dprintk("nfsd: MKDIR(3)    %s %.*s\n",
 270                                 SVCFH_fmt(&argp->fh),
 271                                 argp->len,
 272                                 argp->name);
 273
 274         argp->attrs.ia_valid &= ~ATTR_SIZE;
 275         fh_copy(&resp->dirfh, &argp->fh);
 276         fh_init(&resp->fh, NFS3_FHSIZE);
 277         resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 278                                    &argp->attrs, S_IFDIR, 0, &resp->fh);
 279         fh_unlock(&resp->dirfh);
 280         return rpc_success;
 281 }
 282
 283 static __be32
 284 nfsd3_proc_symlink(struct svc_rqst *rqstp)
 285 {
 286         struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
 287         struct nfsd3_diropres *resp = rqstp->rq_resp;
 288
 289         if (argp->tlen == 0) {
 290                 resp->status = nfserr_inval;
 291                 goto out;
 292         }
 293         if (argp->tlen > NFS3_MAXPATHLEN) {
 294                 resp->status = nfserr_nametoolong;
 295                 goto out;
 296         }
 297
 298         argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
 299                                                 page_address(rqstp->rq_arg.pages[0]),
 300                                                 argp->tlen);
 301         if (IS_ERR(argp->tname)) {
 302                 resp->status = nfserrno(PTR_ERR(argp->tname));
 303                 goto out;
 304         }
 305
 306         dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
 307                                 SVCFH_fmt(&argp->ffh),
 308                                 argp->flen, argp->fname,
 309                                 argp->tlen, argp->tname);
 310
 311         fh_copy(&resp->dirfh, &argp->ffh);
 312         fh_init(&resp->fh, NFS3_FHSIZE);
 313         resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
 314                                     argp->flen, argp->tname, &resp->fh);
 315         kfree(argp->tname);
 316 out:
 317         return rpc_success;
 318 }
 319
 320 /*
 321  * Make socket/fifo/device.
 322  */
 323 static __be32
 324 nfsd3_proc_mknod(struct svc_rqst *rqstp)
 325 {
 326         struct nfsd3_mknodargs *argp = rqstp->rq_argp;
 327         struct nfsd3_diropres  *resp = rqstp->rq_resp;
 328         int type;
 329         dev_t   rdev = 0;
 330
 331         dprintk("nfsd: MKNOD(3)    %s %.*s\n",
 332                                 SVCFH_fmt(&argp->fh),
 333                                 argp->len,
 334                                 argp->name);
 335
 336         fh_copy(&resp->dirfh, &argp->fh);
 337         fh_init(&resp->fh, NFS3_FHSIZE);
 338
 339         if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
 340                 rdev = MKDEV(argp->major, argp->minor);
 341                 if (MAJOR(rdev) != argp->major ||
 342                     MINOR(rdev) != argp->minor) {
 343                         resp->status = nfserr_inval;
 344                         goto out;
 345                 }
 346         } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
 347                 resp->status = nfserr_badtype;
 348                 goto out;
 349         }
 350
 351         type = nfs3_ftypes[argp->ftype];
 352         resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 353                                    &argp->attrs, type, rdev, &resp->fh);
 354         fh_unlock(&resp->dirfh);
 355 out:
 356         return rpc_success;
 357 }
 358
 359 /*
 360  * Remove file/fifo/socket etc.
 361  */
 362 static __be32
 363 nfsd3_proc_remove(struct svc_rqst *rqstp)
 364 {
 365         struct nfsd3_diropargs *argp = rqstp->rq_argp;
 366         struct nfsd3_attrstat *resp = rqstp->rq_resp;
 367
 368         dprintk("nfsd: REMOVE(3)   %s %.*s\n",
 369                                 SVCFH_fmt(&argp->fh),
 370                                 argp->len,
 371                                 argp->name);
 372
 373         /* Unlink. -S_IFDIR means file must not be a directory */
 374         fh_copy(&resp->fh, &argp->fh);
 375         resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
 376                                    argp->name, argp->len);
 377         fh_unlock(&resp->fh);
 378         return rpc_success;
 379 }
 380
 381 /*
 382  * Remove a directory
 383  */
 384 static __be32
 385 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
 386 {
 387         struct nfsd3_diropargs *argp = rqstp->rq_argp;
 388         struct nfsd3_attrstat *resp = rqstp->rq_resp;
 389
 390         dprintk("nfsd: RMDIR(3)    %s %.*s\n",
 391                                 SVCFH_fmt(&argp->fh),
 392                                 argp->len,
 393                                 argp->name);
 394
 395         fh_copy(&resp->fh, &argp->fh);
 396         resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
 397                                    argp->name, argp->len);
 398         fh_unlock(&resp->fh);
 399         return rpc_success;
 400 }
 401
 402 static __be32
 403 nfsd3_proc_rename(struct svc_rqst *rqstp)
 404 {
 405         struct nfsd3_renameargs *argp = rqstp->rq_argp;
 406         struct nfsd3_renameres *resp = rqstp->rq_resp;
 407
 408         dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
 409                                 SVCFH_fmt(&argp->ffh),
 410                                 argp->flen,
 411                                 argp->fname);
 412         dprintk("nfsd: -> %s %.*s\n",
 413                                 SVCFH_fmt(&argp->tfh),
 414                                 argp->tlen,
 415                                 argp->tname);
 416
 417         fh_copy(&resp->ffh, &argp->ffh);
 418         fh_copy(&resp->tfh, &argp->tfh);
 419         resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
 420                                    &resp->tfh, argp->tname, argp->tlen);
 421         return rpc_success;
 422 }
 423
 424 static __be32
 425 nfsd3_proc_link(struct svc_rqst *rqstp)
 426 {
 427         struct nfsd3_linkargs *argp = rqstp->rq_argp;
 428         struct nfsd3_linkres  *resp = rqstp->rq_resp;
 429
 430         dprintk("nfsd: LINK(3)     %s ->\n",
 431                                 SVCFH_fmt(&argp->ffh));
 432         dprintk("nfsd:   -> %s %.*s\n",
 433                                 SVCFH_fmt(&argp->tfh),
 434                                 argp->tlen,
 435                                 argp->tname);
 436
 437         fh_copy(&resp->fh,  &argp->ffh);
 438         fh_copy(&resp->tfh, &argp->tfh);
 439         resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
 440                                  &resp->fh);
 441         return rpc_success;
 442 }
 443
 444 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
 445                                      struct nfsd3_readdirres *resp,
 446                                      u32 count)
 447 {
 448         struct xdr_buf *buf = &resp->dirlist;
 449         struct xdr_stream *xdr = &resp->xdr;
 450
 451         count = clamp(count, (u32)(XDR_UNIT * 2), svc_max_payload(rqstp));
 452
 453         memset(buf, 0, sizeof(*buf));
 454
 455         /* Reserve room for the NULL ptr & eof flag (-2 words) */
 456         buf->buflen = count - XDR_UNIT * 2;
 457         buf->pages = rqstp->rq_next_page;
 458         rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
 459
 460         /* This is xdr_init_encode(), but it assumes that
 461          * the head kvec has already been consumed. */
 462         xdr_set_scratch_buffer(xdr, NULL, 0);
 463         xdr->buf = buf;
 464         xdr->page_ptr = buf->pages;
 465         xdr->iov = NULL;
 466         xdr->p = page_address(*buf->pages);
 467         xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
 468         xdr->rqst = NULL;
 469 }
 470
 471 /*
 472  * Read a portion of a directory.
 473  */
 474 static __be32
 475 nfsd3_proc_readdir(struct svc_rqst *rqstp)
 476 {
 477         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 478         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 479         loff_t          offset;
 480
 481         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
 482                                 SVCFH_fmt(&argp->fh),
 483                                 argp->count, (u32) argp->cookie);
 484
 485         nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
 486
 487         fh_copy(&resp->fh, &argp->fh);
 488         resp->common.err = nfs_ok;
 489         resp->cookie_offset = 0;
 490         resp->rqstp = rqstp;
 491         offset = argp->cookie;
 492         resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
 493                                     &resp->common, nfs3svc_encode_entry3);
 494         memcpy(resp->verf, argp->verf, 8);
 495         nfs3svc_encode_cookie3(resp, offset);
 496
 497         /* Recycle only pages that were part of the reply */
 498         rqstp->rq_next_page = resp->xdr.page_ptr + 1;
 499
 500         return rpc_success;
 501 }
 502
 503 /*
 504  * Read a portion of a directory, including file handles and attrs.
 505  * For now, we choose to ignore the dircount parameter.
 506  */
 507 static __be32
 508 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
 509 {
 510         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 511         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 512         loff_t  offset;
 513
 514         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
 515                                 SVCFH_fmt(&argp->fh),
 516                                 argp->count, (u32) argp->cookie);
 517
 518         nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
 519
 520         fh_copy(&resp->fh, &argp->fh);
 521         resp->common.err = nfs_ok;
 522         resp->cookie_offset = 0;
 523         resp->rqstp = rqstp;
 524         offset = argp->cookie;
 525
 526         resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
 527         if (resp->status != nfs_ok)
 528                 goto out;
 529
 530         if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
 531                 resp->status = nfserr_notsupp;
 532                 goto out;
 533         }
 534
 535         resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
 536                                     &resp->common, nfs3svc_encode_entryplus3);
 537         memcpy(resp->verf, argp->verf, 8);
 538         nfs3svc_encode_cookie3(resp, offset);
 539
 540         /* Recycle only pages that were part of the reply */
 541         rqstp->rq_next_page = resp->xdr.page_ptr + 1;
 542
 543 out:
 544         return rpc_success;
 545 }
 546
 547 /*
 548  * Get file system stats
 549  */
 550 static __be32
 551 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
 552 {
 553         struct nfsd_fhandle *argp = rqstp->rq_argp;
 554         struct nfsd3_fsstatres *resp = rqstp->rq_resp;
 555
 556         dprintk("nfsd: FSSTAT(3)   %s\n",
 557                                 SVCFH_fmt(&argp->fh));
 558
 559         resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
 560         fh_put(&argp->fh);
 561         return rpc_success;
 562 }
 563
 564 /*
 565  * Get file system info
 566  */
 567 static __be32
 568 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
 569 {
 570         struct nfsd_fhandle *argp = rqstp->rq_argp;
 571         struct nfsd3_fsinfores *resp = rqstp->rq_resp;
 572         u32     max_blocksize = svc_max_payload(rqstp);
 573
 574         dprintk("nfsd: FSINFO(3)   %s\n",
 575                                 SVCFH_fmt(&argp->fh));
 576
 577         resp->f_rtmax  = max_blocksize;
 578         resp->f_rtpref = max_blocksize;
 579         resp->f_rtmult = PAGE_SIZE;
 580         resp->f_wtmax  = max_blocksize;
 581         resp->f_wtpref = max_blocksize;
 582         resp->f_wtmult = PAGE_SIZE;
 583         resp->f_dtpref = max_blocksize;
 584         resp->f_maxfilesize = ~(u32) 0;
 585         resp->f_properties = NFS3_FSF_DEFAULT;
 586
 587         resp->status = fh_verify(rqstp, &argp->fh, 0,
 588                                  NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
 589
 590         /* Check special features of the file system. May request
 591          * different read/write sizes for file systems known to have
 592          * problems with large blocks */
 593         if (resp->status == nfs_ok) {
 594                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 595
 596                 /* Note that we don't care for remote fs's here */
 597                 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
 598                         resp->f_properties = NFS3_FSF_BILLYBOY;
 599                 }
 600                 resp->f_maxfilesize = sb->s_maxbytes;
 601         }
 602
 603         fh_put(&argp->fh);
 604         return rpc_success;
 605 }
 606
 607 /*
 608  * Get pathconf info for the specified file
 609  */
 610 static __be32
 611 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
 612 {
 613         struct nfsd_fhandle *argp = rqstp->rq_argp;
 614         struct nfsd3_pathconfres *resp = rqstp->rq_resp;
 615
 616         dprintk("nfsd: PATHCONF(3) %s\n",
 617                                 SVCFH_fmt(&argp->fh));
 618
 619         /* Set default pathconf */
 620         resp->p_link_max = 255;         /* at least */
 621         resp->p_name_max = 255;         /* at least */
 622         resp->p_no_trunc = 0;
 623         resp->p_chown_restricted = 1;
 624         resp->p_case_insensitive = 0;
 625         resp->p_case_preserving = 1;
 626
 627         resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
 628
 629         if (resp->status == nfs_ok) {
 630                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 631
 632                 /* Note that we don't care for remote fs's here */
 633                 switch (sb->s_magic) {
 634                 case EXT2_SUPER_MAGIC:
 635                         resp->p_link_max = EXT2_LINK_MAX;
 636                         resp->p_name_max = EXT2_NAME_LEN;
 637                         break;
 638                 case MSDOS_SUPER_MAGIC:
 639                         resp->p_case_insensitive = 1;
 640                         resp->p_case_preserving  = 0;
 641                         break;
 642                 }
 643         }
 644
 645         fh_put(&argp->fh);
 646         return rpc_success;
 647 }
 648
 649 /*
 650  * Commit a file (range) to stable storage.
 651  */
 652 static __be32
 653 nfsd3_proc_commit(struct svc_rqst *rqstp)
 654 {
 655         struct nfsd3_commitargs *argp = rqstp->rq_argp;
 656         struct nfsd3_commitres *resp = rqstp->rq_resp;
 657
 658         dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
 659                                 SVCFH_fmt(&argp->fh),
 660                                 argp->count,
 661                                 (unsigned long long) argp->offset);
 662
 663         fh_copy(&resp->fh, &argp->fh);
 664         resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
 665                                    argp->count, resp->verf);
 666         return rpc_success;
 667 }
 668
 669
 670 /*
 671  * NFSv3 Server procedures.
 672  * Only the results of non-idempotent operations are cached.
 673  */
 674 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
 675 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
 676 #define nfsd3_mkdirargs                 nfsd3_createargs
 677 #define nfsd3_readdirplusargs           nfsd3_readdirargs
 678 #define nfsd3_fhandleargs               nfsd_fhandle
 679 #define nfsd3_attrstatres               nfsd3_attrstat
 680 #define nfsd3_wccstatres                nfsd3_attrstat
 681 #define nfsd3_createres                 nfsd3_diropres
 682
 683 #define ST 1            /* status*/
 684 #define FH 17           /* filehandle with length */
 685 #define AT 21           /* attributes */
 686 #define pAT (1+AT)      /* post attributes - conditional */
 687 #define WC (7+pAT)      /* WCC attributes */
 688
 689 static const struct svc_procedure nfsd_procedures3[22] = {
 690         [NFS3PROC_NULL] = {
 691                 .pc_func = nfsd3_proc_null,
 692                 .pc_decode = nfssvc_decode_voidarg,
 693                 .pc_encode = nfssvc_encode_voidres,
 694                 .pc_argsize = sizeof(struct nfsd_voidargs),
 695                 .pc_ressize = sizeof(struct nfsd_voidres),
 696                 .pc_cachetype = RC_NOCACHE,
 697                 .pc_xdrressize = ST,
 698                 .pc_name = "NULL",
 699         },
 700         [NFS3PROC_GETATTR] = {
 701                 .pc_func = nfsd3_proc_getattr,
 702                 .pc_decode = nfs3svc_decode_fhandleargs,
 703                 .pc_encode = nfs3svc_encode_getattrres,
 704                 .pc_release = nfs3svc_release_fhandle,
 705                 .pc_argsize = sizeof(struct nfsd_fhandle),
 706                 .pc_ressize = sizeof(struct nfsd3_attrstatres),
 707                 .pc_cachetype = RC_NOCACHE,
 708                 .pc_xdrressize = ST+AT,
 709                 .pc_name = "GETATTR",
 710         },
 711         [NFS3PROC_SETATTR] = {
 712                 .pc_func = nfsd3_proc_setattr,
 713                 .pc_decode = nfs3svc_decode_sattrargs,
 714                 .pc_encode = nfs3svc_encode_wccstatres,
 715                 .pc_release = nfs3svc_release_fhandle,
 716                 .pc_argsize = sizeof(struct nfsd3_sattrargs),
 717                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 718                 .pc_cachetype = RC_REPLBUFF,
 719                 .pc_xdrressize = ST+WC,
 720                 .pc_name = "SETATTR",
 721         },
 722         [NFS3PROC_LOOKUP] = {
 723                 .pc_func = nfsd3_proc_lookup,
 724                 .pc_decode = nfs3svc_decode_diropargs,
 725                 .pc_encode = nfs3svc_encode_lookupres,
 726                 .pc_release = nfs3svc_release_fhandle2,
 727                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 728                 .pc_ressize = sizeof(struct nfsd3_diropres),
 729                 .pc_cachetype = RC_NOCACHE,
 730                 .pc_xdrressize = ST+FH+pAT+pAT,
 731                 .pc_name = "LOOKUP",
 732         },
 733         [NFS3PROC_ACCESS] = {
 734                 .pc_func = nfsd3_proc_access,
 735                 .pc_decode = nfs3svc_decode_accessargs,
 736                 .pc_encode = nfs3svc_encode_accessres,
 737                 .pc_release = nfs3svc_release_fhandle,
 738                 .pc_argsize = sizeof(struct nfsd3_accessargs),
 739                 .pc_ressize = sizeof(struct nfsd3_accessres),
 740                 .pc_cachetype = RC_NOCACHE,
 741                 .pc_xdrressize = ST+pAT+1,
 742                 .pc_name = "ACCESS",
 743         },
 744         [NFS3PROC_READLINK] = {
 745                 .pc_func = nfsd3_proc_readlink,
 746                 .pc_decode = nfs3svc_decode_fhandleargs,
 747                 .pc_encode = nfs3svc_encode_readlinkres,
 748                 .pc_release = nfs3svc_release_fhandle,
 749                 .pc_argsize = sizeof(struct nfsd_fhandle),
 750                 .pc_ressize = sizeof(struct nfsd3_readlinkres),
 751                 .pc_cachetype = RC_NOCACHE,
 752                 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
 753                 .pc_name = "READLINK",
 754         },
 755         [NFS3PROC_READ] = {
 756                 .pc_func = nfsd3_proc_read,
 757                 .pc_decode = nfs3svc_decode_readargs,
 758                 .pc_encode = nfs3svc_encode_readres,
 759                 .pc_release = nfs3svc_release_fhandle,
 760                 .pc_argsize = sizeof(struct nfsd3_readargs),
 761                 .pc_ressize = sizeof(struct nfsd3_readres),
 762                 .pc_cachetype = RC_NOCACHE,
 763                 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
 764                 .pc_name = "READ",
 765         },
 766         [NFS3PROC_WRITE] = {
 767                 .pc_func = nfsd3_proc_write,
 768                 .pc_decode = nfs3svc_decode_writeargs,
 769                 .pc_encode = nfs3svc_encode_writeres,
 770                 .pc_release = nfs3svc_release_fhandle,
 771                 .pc_argsize = sizeof(struct nfsd3_writeargs),
 772                 .pc_ressize = sizeof(struct nfsd3_writeres),
 773                 .pc_cachetype = RC_REPLBUFF,
 774                 .pc_xdrressize = ST+WC+4,
 775                 .pc_name = "WRITE",
 776         },
 777         [NFS3PROC_CREATE] = {
 778                 .pc_func = nfsd3_proc_create,
 779                 .pc_decode = nfs3svc_decode_createargs,
 780                 .pc_encode = nfs3svc_encode_createres,
 781                 .pc_release = nfs3svc_release_fhandle2,
 782                 .pc_argsize = sizeof(struct nfsd3_createargs),
 783                 .pc_ressize = sizeof(struct nfsd3_createres),
 784                 .pc_cachetype = RC_REPLBUFF,
 785                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 786                 .pc_name = "CREATE",
 787         },
 788         [NFS3PROC_MKDIR] = {
 789                 .pc_func = nfsd3_proc_mkdir,
 790                 .pc_decode = nfs3svc_decode_mkdirargs,
 791                 .pc_encode = nfs3svc_encode_createres,
 792                 .pc_release = nfs3svc_release_fhandle2,
 793                 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
 794                 .pc_ressize = sizeof(struct nfsd3_createres),
 795                 .pc_cachetype = RC_REPLBUFF,
 796                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 797                 .pc_name = "MKDIR",
 798         },
 799         [NFS3PROC_SYMLINK] = {
 800                 .pc_func = nfsd3_proc_symlink,
 801                 .pc_decode = nfs3svc_decode_symlinkargs,
 802                 .pc_encode = nfs3svc_encode_createres,
 803                 .pc_release = nfs3svc_release_fhandle2,
 804                 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
 805                 .pc_ressize = sizeof(struct nfsd3_createres),
 806                 .pc_cachetype = RC_REPLBUFF,
 807                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 808                 .pc_name = "SYMLINK",
 809         },
 810         [NFS3PROC_MKNOD] = {
 811                 .pc_func = nfsd3_proc_mknod,
 812                 .pc_decode = nfs3svc_decode_mknodargs,
 813                 .pc_encode = nfs3svc_encode_createres,
 814                 .pc_release = nfs3svc_release_fhandle2,
 815                 .pc_argsize = sizeof(struct nfsd3_mknodargs),
 816                 .pc_ressize = sizeof(struct nfsd3_createres),
 817                 .pc_cachetype = RC_REPLBUFF,
 818                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 819                 .pc_name = "MKNOD",
 820         },
 821         [NFS3PROC_REMOVE] = {
 822                 .pc_func = nfsd3_proc_remove,
 823                 .pc_decode = nfs3svc_decode_diropargs,
 824                 .pc_encode = nfs3svc_encode_wccstatres,
 825                 .pc_release = nfs3svc_release_fhandle,
 826                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 827                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 828                 .pc_cachetype = RC_REPLBUFF,
 829                 .pc_xdrressize = ST+WC,
 830                 .pc_name = "REMOVE",
 831         },
 832         [NFS3PROC_RMDIR] = {
 833                 .pc_func = nfsd3_proc_rmdir,
 834                 .pc_decode = nfs3svc_decode_diropargs,
 835                 .pc_encode = nfs3svc_encode_wccstatres,
 836                 .pc_release = nfs3svc_release_fhandle,
 837                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 838                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 839                 .pc_cachetype = RC_REPLBUFF,
 840                 .pc_xdrressize = ST+WC,
 841                 .pc_name = "RMDIR",
 842         },
 843         [NFS3PROC_RENAME] = {
 844                 .pc_func = nfsd3_proc_rename,
 845                 .pc_decode = nfs3svc_decode_renameargs,
 846                 .pc_encode = nfs3svc_encode_renameres,
 847                 .pc_release = nfs3svc_release_fhandle2,
 848                 .pc_argsize = sizeof(struct nfsd3_renameargs),
 849                 .pc_ressize = sizeof(struct nfsd3_renameres),
 850                 .pc_cachetype = RC_REPLBUFF,
 851                 .pc_xdrressize = ST+WC+WC,
 852                 .pc_name = "RENAME",
 853         },
 854         [NFS3PROC_LINK] = {
 855                 .pc_func = nfsd3_proc_link,
 856                 .pc_decode = nfs3svc_decode_linkargs,
 857                 .pc_encode = nfs3svc_encode_linkres,
 858                 .pc_release = nfs3svc_release_fhandle2,
 859                 .pc_argsize = sizeof(struct nfsd3_linkargs),
 860                 .pc_ressize = sizeof(struct nfsd3_linkres),
 861                 .pc_cachetype = RC_REPLBUFF,
 862                 .pc_xdrressize = ST+pAT+WC,
 863                 .pc_name = "LINK",
 864         },
 865         [NFS3PROC_READDIR] = {
 866                 .pc_func = nfsd3_proc_readdir,
 867                 .pc_decode = nfs3svc_decode_readdirargs,
 868                 .pc_encode = nfs3svc_encode_readdirres,
 869                 .pc_release = nfs3svc_release_fhandle,
 870                 .pc_argsize = sizeof(struct nfsd3_readdirargs),
 871                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 872                 .pc_cachetype = RC_NOCACHE,
 873                 .pc_name = "READDIR",
 874         },
 875         [NFS3PROC_READDIRPLUS] = {
 876                 .pc_func = nfsd3_proc_readdirplus,
 877                 .pc_decode = nfs3svc_decode_readdirplusargs,
 878                 .pc_encode = nfs3svc_encode_readdirres,
 879                 .pc_release = nfs3svc_release_fhandle,
 880                 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
 881                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 882                 .pc_cachetype = RC_NOCACHE,
 883                 .pc_name = "READDIRPLUS",
 884         },
 885         [NFS3PROC_FSSTAT] = {
 886                 .pc_func = nfsd3_proc_fsstat,
 887                 .pc_decode = nfs3svc_decode_fhandleargs,
 888                 .pc_encode = nfs3svc_encode_fsstatres,
 889                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 890                 .pc_ressize = sizeof(struct nfsd3_fsstatres),
 891                 .pc_cachetype = RC_NOCACHE,
 892                 .pc_xdrressize = ST+pAT+2*6+1,
 893                 .pc_name = "FSSTAT",
 894         },
 895         [NFS3PROC_FSINFO] = {
 896                 .pc_func = nfsd3_proc_fsinfo,
 897                 .pc_decode = nfs3svc_decode_fhandleargs,
 898                 .pc_encode = nfs3svc_encode_fsinfores,
 899                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 900                 .pc_ressize = sizeof(struct nfsd3_fsinfores),
 901                 .pc_cachetype = RC_NOCACHE,
 902                 .pc_xdrressize = ST+pAT+12,
 903                 .pc_name = "FSINFO",
 904         },
 905         [NFS3PROC_PATHCONF] = {
 906                 .pc_func = nfsd3_proc_pathconf,
 907                 .pc_decode = nfs3svc_decode_fhandleargs,
 908                 .pc_encode = nfs3svc_encode_pathconfres,
 909                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 910                 .pc_ressize = sizeof(struct nfsd3_pathconfres),
 911                 .pc_cachetype = RC_NOCACHE,
 912                 .pc_xdrressize = ST+pAT+6,
 913                 .pc_name = "PATHCONF",
 914         },
 915         [NFS3PROC_COMMIT] = {
 916                 .pc_func = nfsd3_proc_commit,
 917                 .pc_decode = nfs3svc_decode_commitargs,
 918                 .pc_encode = nfs3svc_encode_commitres,
 919                 .pc_release = nfs3svc_release_fhandle,
 920                 .pc_argsize = sizeof(struct nfsd3_commitargs),
 921                 .pc_ressize = sizeof(struct nfsd3_commitres),
 922                 .pc_cachetype = RC_NOCACHE,
 923                 .pc_xdrressize = ST+WC+2,
 924                 .pc_name = "COMMIT",
 925         },
 926 };
 927
 928 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
 929 const struct svc_version nfsd_version3 = {
 930         .vs_vers        = 3,
 931         .vs_nproc       = 22,
 932         .vs_proc        = nfsd_procedures3,
 933         .vs_dispatch    = nfsd_dispatch,
 934         .vs_count       = nfsd_count3,
 935         .vs_xdrsize     = NFS3_SVC_XDRSIZE,
 936 };