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 <okir@monad.swb.de>
   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         unsigned int len;
 150         int v;
 151
 152         dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
 153                                 SVCFH_fmt(&argp->fh),
 154                                 (unsigned long) argp->count,
 155                                 (unsigned long long) argp->offset);
 156
 157         argp->count = min_t(u32, argp->count, svc_max_payload(rqstp));
 158         argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
 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         unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen,
 451                                      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 = clamp(count, (u32)(XDR_UNIT * 2), sendbuf);
 457         buf->buflen -= XDR_UNIT * 2;
 458         buf->pages = rqstp->rq_next_page;
 459         rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
 460
 461         /* This is xdr_init_encode(), but it assumes that
 462          * the head kvec has already been consumed. */
 463         xdr_set_scratch_buffer(xdr, NULL, 0);
 464         xdr->buf = buf;
 465         xdr->page_ptr = buf->pages;
 466         xdr->iov = NULL;
 467         xdr->p = page_address(*buf->pages);
 468         xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
 469         xdr->rqst = NULL;
 470 }
 471
 472 /*
 473  * Read a portion of a directory.
 474  */
 475 static __be32
 476 nfsd3_proc_readdir(struct svc_rqst *rqstp)
 477 {
 478         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 479         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 480         loff_t          offset;
 481
 482         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
 483                                 SVCFH_fmt(&argp->fh),
 484                                 argp->count, (u32) argp->cookie);
 485
 486         nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
 487
 488         fh_copy(&resp->fh, &argp->fh);
 489         resp->common.err = nfs_ok;
 490         resp->cookie_offset = 0;
 491         resp->rqstp = rqstp;
 492         offset = argp->cookie;
 493         resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
 494                                     &resp->common, nfs3svc_encode_entry3);
 495         memcpy(resp->verf, argp->verf, 8);
 496         nfs3svc_encode_cookie3(resp, offset);
 497
 498         /* Recycle only pages that were part of the reply */
 499         rqstp->rq_next_page = resp->xdr.page_ptr + 1;
 500
 501         return rpc_success;
 502 }
 503
 504 /*
 505  * Read a portion of a directory, including file handles and attrs.
 506  * For now, we choose to ignore the dircount parameter.
 507  */
 508 static __be32
 509 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
 510 {
 511         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 512         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 513         loff_t  offset;
 514
 515         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
 516                                 SVCFH_fmt(&argp->fh),
 517                                 argp->count, (u32) argp->cookie);
 518
 519         nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
 520
 521         fh_copy(&resp->fh, &argp->fh);
 522         resp->common.err = nfs_ok;
 523         resp->cookie_offset = 0;
 524         resp->rqstp = rqstp;
 525         offset = argp->cookie;
 526
 527         resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
 528         if (resp->status != nfs_ok)
 529                 goto out;
 530
 531         if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
 532                 resp->status = nfserr_notsupp;
 533                 goto out;
 534         }
 535
 536         resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
 537                                     &resp->common, nfs3svc_encode_entryplus3);
 538         memcpy(resp->verf, argp->verf, 8);
 539         nfs3svc_encode_cookie3(resp, offset);
 540
 541         /* Recycle only pages that were part of the reply */
 542         rqstp->rq_next_page = resp->xdr.page_ptr + 1;
 543
 544 out:
 545         return rpc_success;
 546 }
 547
 548 /*
 549  * Get file system stats
 550  */
 551 static __be32
 552 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
 553 {
 554         struct nfsd_fhandle *argp = rqstp->rq_argp;
 555         struct nfsd3_fsstatres *resp = rqstp->rq_resp;
 556
 557         dprintk("nfsd: FSSTAT(3)   %s\n",
 558                                 SVCFH_fmt(&argp->fh));
 559
 560         resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
 561         fh_put(&argp->fh);
 562         return rpc_success;
 563 }
 564
 565 /*
 566  * Get file system info
 567  */
 568 static __be32
 569 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
 570 {
 571         struct nfsd_fhandle *argp = rqstp->rq_argp;
 572         struct nfsd3_fsinfores *resp = rqstp->rq_resp;
 573         u32     max_blocksize = svc_max_payload(rqstp);
 574
 575         dprintk("nfsd: FSINFO(3)   %s\n",
 576                                 SVCFH_fmt(&argp->fh));
 577
 578         resp->f_rtmax  = max_blocksize;
 579         resp->f_rtpref = max_blocksize;
 580         resp->f_rtmult = PAGE_SIZE;
 581         resp->f_wtmax  = max_blocksize;
 582         resp->f_wtpref = max_blocksize;
 583         resp->f_wtmult = PAGE_SIZE;
 584         resp->f_dtpref = max_blocksize;
 585         resp->f_maxfilesize = ~(u32) 0;
 586         resp->f_properties = NFS3_FSF_DEFAULT;
 587
 588         resp->status = fh_verify(rqstp, &argp->fh, 0,
 589                                  NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
 590
 591         /* Check special features of the file system. May request
 592          * different read/write sizes for file systems known to have
 593          * problems with large blocks */
 594         if (resp->status == nfs_ok) {
 595                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 596
 597                 /* Note that we don't care for remote fs's here */
 598                 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
 599                         resp->f_properties = NFS3_FSF_BILLYBOY;
 600                 }
 601                 resp->f_maxfilesize = sb->s_maxbytes;
 602         }
 603
 604         fh_put(&argp->fh);
 605         return rpc_success;
 606 }
 607
 608 /*
 609  * Get pathconf info for the specified file
 610  */
 611 static __be32
 612 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
 613 {
 614         struct nfsd_fhandle *argp = rqstp->rq_argp;
 615         struct nfsd3_pathconfres *resp = rqstp->rq_resp;
 616
 617         dprintk("nfsd: PATHCONF(3) %s\n",
 618                                 SVCFH_fmt(&argp->fh));
 619
 620         /* Set default pathconf */
 621         resp->p_link_max = 255;         /* at least */
 622         resp->p_name_max = 255;         /* at least */
 623         resp->p_no_trunc = 0;
 624         resp->p_chown_restricted = 1;
 625         resp->p_case_insensitive = 0;
 626         resp->p_case_preserving = 1;
 627
 628         resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
 629
 630         if (resp->status == nfs_ok) {
 631                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 632
 633                 /* Note that we don't care for remote fs's here */
 634                 switch (sb->s_magic) {
 635                 case EXT2_SUPER_MAGIC:
 636                         resp->p_link_max = EXT2_LINK_MAX;
 637                         resp->p_name_max = EXT2_NAME_LEN;
 638                         break;
 639                 case MSDOS_SUPER_MAGIC:
 640                         resp->p_case_insensitive = 1;
 641                         resp->p_case_preserving  = 0;
 642                         break;
 643                 }
 644         }
 645
 646         fh_put(&argp->fh);
 647         return rpc_success;
 648 }
 649
 650 /*
 651  * Commit a file (range) to stable storage.
 652  */
 653 static __be32
 654 nfsd3_proc_commit(struct svc_rqst *rqstp)
 655 {
 656         struct nfsd3_commitargs *argp = rqstp->rq_argp;
 657         struct nfsd3_commitres *resp = rqstp->rq_resp;
 658
 659         dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
 660                                 SVCFH_fmt(&argp->fh),
 661                                 argp->count,
 662                                 (unsigned long long) argp->offset);
 663
 664         fh_copy(&resp->fh, &argp->fh);
 665         resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
 666                                    argp->count, resp->verf);
 667         return rpc_success;
 668 }
 669
 670
 671 /*
 672  * NFSv3 Server procedures.
 673  * Only the results of non-idempotent operations are cached.
 674  */
 675 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
 676 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
 677 #define nfsd3_mkdirargs                 nfsd3_createargs
 678 #define nfsd3_readdirplusargs           nfsd3_readdirargs
 679 #define nfsd3_fhandleargs               nfsd_fhandle
 680 #define nfsd3_attrstatres               nfsd3_attrstat
 681 #define nfsd3_wccstatres                nfsd3_attrstat
 682 #define nfsd3_createres                 nfsd3_diropres
 683
 684 #define ST 1            /* status*/
 685 #define FH 17           /* filehandle with length */
 686 #define AT 21           /* attributes */
 687 #define pAT (1+AT)      /* post attributes - conditional */
 688 #define WC (7+pAT)      /* WCC attributes */
 689
 690 static const struct svc_procedure nfsd_procedures3[22] = {
 691         [NFS3PROC_NULL] = {
 692                 .pc_func = nfsd3_proc_null,
 693                 .pc_decode = nfssvc_decode_voidarg,
 694                 .pc_encode = nfssvc_encode_voidres,
 695                 .pc_argsize = sizeof(struct nfsd_voidargs),
 696                 .pc_ressize = sizeof(struct nfsd_voidres),
 697                 .pc_cachetype = RC_NOCACHE,
 698                 .pc_xdrressize = ST,
 699                 .pc_name = "NULL",
 700         },
 701         [NFS3PROC_GETATTR] = {
 702                 .pc_func = nfsd3_proc_getattr,
 703                 .pc_decode = nfs3svc_decode_fhandleargs,
 704                 .pc_encode = nfs3svc_encode_getattrres,
 705                 .pc_release = nfs3svc_release_fhandle,
 706                 .pc_argsize = sizeof(struct nfsd_fhandle),
 707                 .pc_ressize = sizeof(struct nfsd3_attrstatres),
 708                 .pc_cachetype = RC_NOCACHE,
 709                 .pc_xdrressize = ST+AT,
 710                 .pc_name = "GETATTR",
 711         },
 712         [NFS3PROC_SETATTR] = {
 713                 .pc_func = nfsd3_proc_setattr,
 714                 .pc_decode = nfs3svc_decode_sattrargs,
 715                 .pc_encode = nfs3svc_encode_wccstatres,
 716                 .pc_release = nfs3svc_release_fhandle,
 717                 .pc_argsize = sizeof(struct nfsd3_sattrargs),
 718                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 719                 .pc_cachetype = RC_REPLBUFF,
 720                 .pc_xdrressize = ST+WC,
 721                 .pc_name = "SETATTR",
 722         },
 723         [NFS3PROC_LOOKUP] = {
 724                 .pc_func = nfsd3_proc_lookup,
 725                 .pc_decode = nfs3svc_decode_diropargs,
 726                 .pc_encode = nfs3svc_encode_lookupres,
 727                 .pc_release = nfs3svc_release_fhandle2,
 728                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 729                 .pc_ressize = sizeof(struct nfsd3_diropres),
 730                 .pc_cachetype = RC_NOCACHE,
 731                 .pc_xdrressize = ST+FH+pAT+pAT,
 732                 .pc_name = "LOOKUP",
 733         },
 734         [NFS3PROC_ACCESS] = {
 735                 .pc_func = nfsd3_proc_access,
 736                 .pc_decode = nfs3svc_decode_accessargs,
 737                 .pc_encode = nfs3svc_encode_accessres,
 738                 .pc_release = nfs3svc_release_fhandle,
 739                 .pc_argsize = sizeof(struct nfsd3_accessargs),
 740                 .pc_ressize = sizeof(struct nfsd3_accessres),
 741                 .pc_cachetype = RC_NOCACHE,
 742                 .pc_xdrressize = ST+pAT+1,
 743                 .pc_name = "ACCESS",
 744         },
 745         [NFS3PROC_READLINK] = {
 746                 .pc_func = nfsd3_proc_readlink,
 747                 .pc_decode = nfs3svc_decode_fhandleargs,
 748                 .pc_encode = nfs3svc_encode_readlinkres,
 749                 .pc_release = nfs3svc_release_fhandle,
 750                 .pc_argsize = sizeof(struct nfsd_fhandle),
 751                 .pc_ressize = sizeof(struct nfsd3_readlinkres),
 752                 .pc_cachetype = RC_NOCACHE,
 753                 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
 754                 .pc_name = "READLINK",
 755         },
 756         [NFS3PROC_READ] = {
 757                 .pc_func = nfsd3_proc_read,
 758                 .pc_decode = nfs3svc_decode_readargs,
 759                 .pc_encode = nfs3svc_encode_readres,
 760                 .pc_release = nfs3svc_release_fhandle,
 761                 .pc_argsize = sizeof(struct nfsd3_readargs),
 762                 .pc_ressize = sizeof(struct nfsd3_readres),
 763                 .pc_cachetype = RC_NOCACHE,
 764                 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
 765                 .pc_name = "READ",
 766         },
 767         [NFS3PROC_WRITE] = {
 768                 .pc_func = nfsd3_proc_write,
 769                 .pc_decode = nfs3svc_decode_writeargs,
 770                 .pc_encode = nfs3svc_encode_writeres,
 771                 .pc_release = nfs3svc_release_fhandle,
 772                 .pc_argsize = sizeof(struct nfsd3_writeargs),
 773                 .pc_ressize = sizeof(struct nfsd3_writeres),
 774                 .pc_cachetype = RC_REPLBUFF,
 775                 .pc_xdrressize = ST+WC+4,
 776                 .pc_name = "WRITE",
 777         },
 778         [NFS3PROC_CREATE] = {
 779                 .pc_func = nfsd3_proc_create,
 780                 .pc_decode = nfs3svc_decode_createargs,
 781                 .pc_encode = nfs3svc_encode_createres,
 782                 .pc_release = nfs3svc_release_fhandle2,
 783                 .pc_argsize = sizeof(struct nfsd3_createargs),
 784                 .pc_ressize = sizeof(struct nfsd3_createres),
 785                 .pc_cachetype = RC_REPLBUFF,
 786                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 787                 .pc_name = "CREATE",
 788         },
 789         [NFS3PROC_MKDIR] = {
 790                 .pc_func = nfsd3_proc_mkdir,
 791                 .pc_decode = nfs3svc_decode_mkdirargs,
 792                 .pc_encode = nfs3svc_encode_createres,
 793                 .pc_release = nfs3svc_release_fhandle2,
 794                 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
 795                 .pc_ressize = sizeof(struct nfsd3_createres),
 796                 .pc_cachetype = RC_REPLBUFF,
 797                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 798                 .pc_name = "MKDIR",
 799         },
 800         [NFS3PROC_SYMLINK] = {
 801                 .pc_func = nfsd3_proc_symlink,
 802                 .pc_decode = nfs3svc_decode_symlinkargs,
 803                 .pc_encode = nfs3svc_encode_createres,
 804                 .pc_release = nfs3svc_release_fhandle2,
 805                 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
 806                 .pc_ressize = sizeof(struct nfsd3_createres),
 807                 .pc_cachetype = RC_REPLBUFF,
 808                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 809                 .pc_name = "SYMLINK",
 810         },
 811         [NFS3PROC_MKNOD] = {
 812                 .pc_func = nfsd3_proc_mknod,
 813                 .pc_decode = nfs3svc_decode_mknodargs,
 814                 .pc_encode = nfs3svc_encode_createres,
 815                 .pc_release = nfs3svc_release_fhandle2,
 816                 .pc_argsize = sizeof(struct nfsd3_mknodargs),
 817                 .pc_ressize = sizeof(struct nfsd3_createres),
 818                 .pc_cachetype = RC_REPLBUFF,
 819                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 820                 .pc_name = "MKNOD",
 821         },
 822         [NFS3PROC_REMOVE] = {
 823                 .pc_func = nfsd3_proc_remove,
 824                 .pc_decode = nfs3svc_decode_diropargs,
 825                 .pc_encode = nfs3svc_encode_wccstatres,
 826                 .pc_release = nfs3svc_release_fhandle,
 827                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 828                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 829                 .pc_cachetype = RC_REPLBUFF,
 830                 .pc_xdrressize = ST+WC,
 831                 .pc_name = "REMOVE",
 832         },
 833         [NFS3PROC_RMDIR] = {
 834                 .pc_func = nfsd3_proc_rmdir,
 835                 .pc_decode = nfs3svc_decode_diropargs,
 836                 .pc_encode = nfs3svc_encode_wccstatres,
 837                 .pc_release = nfs3svc_release_fhandle,
 838                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 839                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 840                 .pc_cachetype = RC_REPLBUFF,
 841                 .pc_xdrressize = ST+WC,
 842                 .pc_name = "RMDIR",
 843         },
 844         [NFS3PROC_RENAME] = {
 845                 .pc_func = nfsd3_proc_rename,
 846                 .pc_decode = nfs3svc_decode_renameargs,
 847                 .pc_encode = nfs3svc_encode_renameres,
 848                 .pc_release = nfs3svc_release_fhandle2,
 849                 .pc_argsize = sizeof(struct nfsd3_renameargs),
 850                 .pc_ressize = sizeof(struct nfsd3_renameres),
 851                 .pc_cachetype = RC_REPLBUFF,
 852                 .pc_xdrressize = ST+WC+WC,
 853                 .pc_name = "RENAME",
 854         },
 855         [NFS3PROC_LINK] = {
 856                 .pc_func = nfsd3_proc_link,
 857                 .pc_decode = nfs3svc_decode_linkargs,
 858                 .pc_encode = nfs3svc_encode_linkres,
 859                 .pc_release = nfs3svc_release_fhandle2,
 860                 .pc_argsize = sizeof(struct nfsd3_linkargs),
 861                 .pc_ressize = sizeof(struct nfsd3_linkres),
 862                 .pc_cachetype = RC_REPLBUFF,
 863                 .pc_xdrressize = ST+pAT+WC,
 864                 .pc_name = "LINK",
 865         },
 866         [NFS3PROC_READDIR] = {
 867                 .pc_func = nfsd3_proc_readdir,
 868                 .pc_decode = nfs3svc_decode_readdirargs,
 869                 .pc_encode = nfs3svc_encode_readdirres,
 870                 .pc_release = nfs3svc_release_fhandle,
 871                 .pc_argsize = sizeof(struct nfsd3_readdirargs),
 872                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 873                 .pc_cachetype = RC_NOCACHE,
 874                 .pc_name = "READDIR",
 875         },
 876         [NFS3PROC_READDIRPLUS] = {
 877                 .pc_func = nfsd3_proc_readdirplus,
 878                 .pc_decode = nfs3svc_decode_readdirplusargs,
 879                 .pc_encode = nfs3svc_encode_readdirres,
 880                 .pc_release = nfs3svc_release_fhandle,
 881                 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
 882                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 883                 .pc_cachetype = RC_NOCACHE,
 884                 .pc_name = "READDIRPLUS",
 885         },
 886         [NFS3PROC_FSSTAT] = {
 887                 .pc_func = nfsd3_proc_fsstat,
 888                 .pc_decode = nfs3svc_decode_fhandleargs,
 889                 .pc_encode = nfs3svc_encode_fsstatres,
 890                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 891                 .pc_ressize = sizeof(struct nfsd3_fsstatres),
 892                 .pc_cachetype = RC_NOCACHE,
 893                 .pc_xdrressize = ST+pAT+2*6+1,
 894                 .pc_name = "FSSTAT",
 895         },
 896         [NFS3PROC_FSINFO] = {
 897                 .pc_func = nfsd3_proc_fsinfo,
 898                 .pc_decode = nfs3svc_decode_fhandleargs,
 899                 .pc_encode = nfs3svc_encode_fsinfores,
 900                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 901                 .pc_ressize = sizeof(struct nfsd3_fsinfores),
 902                 .pc_cachetype = RC_NOCACHE,
 903                 .pc_xdrressize = ST+pAT+12,
 904                 .pc_name = "FSINFO",
 905         },
 906         [NFS3PROC_PATHCONF] = {
 907                 .pc_func = nfsd3_proc_pathconf,
 908                 .pc_decode = nfs3svc_decode_fhandleargs,
 909                 .pc_encode = nfs3svc_encode_pathconfres,
 910                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 911                 .pc_ressize = sizeof(struct nfsd3_pathconfres),
 912                 .pc_cachetype = RC_NOCACHE,
 913                 .pc_xdrressize = ST+pAT+6,
 914                 .pc_name = "PATHCONF",
 915         },
 916         [NFS3PROC_COMMIT] = {
 917                 .pc_func = nfsd3_proc_commit,
 918                 .pc_decode = nfs3svc_decode_commitargs,
 919                 .pc_encode = nfs3svc_encode_commitres,
 920                 .pc_release = nfs3svc_release_fhandle,
 921                 .pc_argsize = sizeof(struct nfsd3_commitargs),
 922                 .pc_ressize = sizeof(struct nfsd3_commitres),
 923                 .pc_cachetype = RC_NOCACHE,
 924                 .pc_xdrressize = ST+WC+2,
 925                 .pc_name = "COMMIT",
 926         },
 927 };
 928
 929 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
 930 const struct svc_version nfsd_version3 = {
 931         .vs_vers        = 3,
 932         .vs_nproc       = 22,
 933         .vs_proc        = nfsd_procedures3,
 934         .vs_dispatch    = nfsd_dispatch,
 935         .vs_count       = nfsd_count3,
 936         .vs_xdrsize     = NFS3_SVC_XDRSIZE,
 937 };