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 nfsd3_readlinkargs *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->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
 136         return rpc_success;
 137 }
 138
 139 /*
 140  * Read a portion of a file.
 141  */
 142 static __be32
 143 nfsd3_proc_read(struct svc_rqst *rqstp)
 144 {
 145         struct nfsd3_readargs *argp = rqstp->rq_argp;
 146         struct nfsd3_readres *resp = rqstp->rq_resp;
 147         u32     max_blocksize = svc_max_payload(rqstp);
 148         unsigned long cnt = min(argp->count, max_blocksize);
 149
 150         dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
 151                                 SVCFH_fmt(&argp->fh),
 152                                 (unsigned long) argp->count,
 153                                 (unsigned long long) argp->offset);
 154
 155         /* Obtain buffer pointer for payload.
 156          * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
 157          * + 1 (xdr opaque byte count) = 26
 158          */
 159         resp->count = cnt;
 160         svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
 161
 162         fh_copy(&resp->fh, &argp->fh);
 163         resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
 164                                  rqstp->rq_vec, argp->vlen, &resp->count,
 165                                  &resp->eof);
 166         return rpc_success;
 167 }
 168
 169 /*
 170  * Write data to a file
 171  */
 172 static __be32
 173 nfsd3_proc_write(struct svc_rqst *rqstp)
 174 {
 175         struct nfsd3_writeargs *argp = rqstp->rq_argp;
 176         struct nfsd3_writeres *resp = rqstp->rq_resp;
 177         unsigned long cnt = argp->len;
 178         unsigned int nvecs;
 179
 180         dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s\n",
 181                                 SVCFH_fmt(&argp->fh),
 182                                 argp->len,
 183                                 (unsigned long long) argp->offset,
 184                                 argp->stable? " stable" : "");
 185
 186         resp->status = nfserr_fbig;
 187         if (argp->offset > (u64)OFFSET_MAX ||
 188             argp->offset + argp->len > (u64)OFFSET_MAX)
 189                 return rpc_success;
 190
 191         fh_copy(&resp->fh, &argp->fh);
 192         resp->committed = argp->stable;
 193         nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
 194                                       &argp->first, cnt);
 195         if (!nvecs) {
 196                 resp->status = nfserr_io;
 197                 goto out;
 198         }
 199         resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
 200                                   rqstp->rq_vec, nvecs, &cnt,
 201                                   resp->committed, resp->verf);
 202         resp->count = cnt;
 203 out:
 204         return rpc_success;
 205 }
 206
 207 /*
 208  * With NFSv3, CREATE processing is a lot easier than with NFSv2.
 209  * At least in theory; we'll see how it fares in practice when the
 210  * first reports about SunOS compatibility problems start to pour in...
 211  */
 212 static __be32
 213 nfsd3_proc_create(struct svc_rqst *rqstp)
 214 {
 215         struct nfsd3_createargs *argp = rqstp->rq_argp;
 216         struct nfsd3_diropres *resp = rqstp->rq_resp;
 217         svc_fh          *dirfhp, *newfhp = NULL;
 218         struct iattr    *attr;
 219
 220         dprintk("nfsd: CREATE(3)   %s %.*s\n",
 221                                 SVCFH_fmt(&argp->fh),
 222                                 argp->len,
 223                                 argp->name);
 224
 225         dirfhp = fh_copy(&resp->dirfh, &argp->fh);
 226         newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
 227         attr   = &argp->attrs;
 228
 229         /* Unfudge the mode bits */
 230         attr->ia_mode &= ~S_IFMT;
 231         if (!(attr->ia_valid & ATTR_MODE)) {
 232                 attr->ia_valid |= ATTR_MODE;
 233                 attr->ia_mode = S_IFREG;
 234         } else {
 235                 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
 236         }
 237
 238         /* Now create the file and set attributes */
 239         resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
 240                                       attr, newfhp, argp->createmode,
 241                                       (u32 *)argp->verf, NULL, NULL);
 242         return rpc_success;
 243 }
 244
 245 /*
 246  * Make directory. This operation is not idempotent.
 247  */
 248 static __be32
 249 nfsd3_proc_mkdir(struct svc_rqst *rqstp)
 250 {
 251         struct nfsd3_createargs *argp = rqstp->rq_argp;
 252         struct nfsd3_diropres *resp = rqstp->rq_resp;
 253
 254         dprintk("nfsd: MKDIR(3)    %s %.*s\n",
 255                                 SVCFH_fmt(&argp->fh),
 256                                 argp->len,
 257                                 argp->name);
 258
 259         argp->attrs.ia_valid &= ~ATTR_SIZE;
 260         fh_copy(&resp->dirfh, &argp->fh);
 261         fh_init(&resp->fh, NFS3_FHSIZE);
 262         resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 263                                    &argp->attrs, S_IFDIR, 0, &resp->fh);
 264         fh_unlock(&resp->dirfh);
 265         return rpc_success;
 266 }
 267
 268 static __be32
 269 nfsd3_proc_symlink(struct svc_rqst *rqstp)
 270 {
 271         struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
 272         struct nfsd3_diropres *resp = rqstp->rq_resp;
 273
 274         if (argp->tlen == 0) {
 275                 resp->status = nfserr_inval;
 276                 goto out;
 277         }
 278         if (argp->tlen > NFS3_MAXPATHLEN) {
 279                 resp->status = nfserr_nametoolong;
 280                 goto out;
 281         }
 282
 283         argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
 284                                                 page_address(rqstp->rq_arg.pages[0]),
 285                                                 argp->tlen);
 286         if (IS_ERR(argp->tname)) {
 287                 resp->status = nfserrno(PTR_ERR(argp->tname));
 288                 goto out;
 289         }
 290
 291         dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s\n",
 292                                 SVCFH_fmt(&argp->ffh),
 293                                 argp->flen, argp->fname,
 294                                 argp->tlen, argp->tname);
 295
 296         fh_copy(&resp->dirfh, &argp->ffh);
 297         fh_init(&resp->fh, NFS3_FHSIZE);
 298         resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
 299                                     argp->flen, argp->tname, &resp->fh);
 300         kfree(argp->tname);
 301 out:
 302         return rpc_success;
 303 }
 304
 305 /*
 306  * Make socket/fifo/device.
 307  */
 308 static __be32
 309 nfsd3_proc_mknod(struct svc_rqst *rqstp)
 310 {
 311         struct nfsd3_mknodargs *argp = rqstp->rq_argp;
 312         struct nfsd3_diropres  *resp = rqstp->rq_resp;
 313         int type;
 314         dev_t   rdev = 0;
 315
 316         dprintk("nfsd: MKNOD(3)    %s %.*s\n",
 317                                 SVCFH_fmt(&argp->fh),
 318                                 argp->len,
 319                                 argp->name);
 320
 321         fh_copy(&resp->dirfh, &argp->fh);
 322         fh_init(&resp->fh, NFS3_FHSIZE);
 323
 324         if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
 325                 rdev = MKDEV(argp->major, argp->minor);
 326                 if (MAJOR(rdev) != argp->major ||
 327                     MINOR(rdev) != argp->minor) {
 328                         resp->status = nfserr_inval;
 329                         goto out;
 330                 }
 331         } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
 332                 resp->status = nfserr_badtype;
 333                 goto out;
 334         }
 335
 336         type = nfs3_ftypes[argp->ftype];
 337         resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
 338                                    &argp->attrs, type, rdev, &resp->fh);
 339         fh_unlock(&resp->dirfh);
 340 out:
 341         return rpc_success;
 342 }
 343
 344 /*
 345  * Remove file/fifo/socket etc.
 346  */
 347 static __be32
 348 nfsd3_proc_remove(struct svc_rqst *rqstp)
 349 {
 350         struct nfsd3_diropargs *argp = rqstp->rq_argp;
 351         struct nfsd3_attrstat *resp = rqstp->rq_resp;
 352
 353         dprintk("nfsd: REMOVE(3)   %s %.*s\n",
 354                                 SVCFH_fmt(&argp->fh),
 355                                 argp->len,
 356                                 argp->name);
 357
 358         /* Unlink. -S_IFDIR means file must not be a directory */
 359         fh_copy(&resp->fh, &argp->fh);
 360         resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
 361                                    argp->name, argp->len);
 362         fh_unlock(&resp->fh);
 363         return rpc_success;
 364 }
 365
 366 /*
 367  * Remove a directory
 368  */
 369 static __be32
 370 nfsd3_proc_rmdir(struct svc_rqst *rqstp)
 371 {
 372         struct nfsd3_diropargs *argp = rqstp->rq_argp;
 373         struct nfsd3_attrstat *resp = rqstp->rq_resp;
 374
 375         dprintk("nfsd: RMDIR(3)    %s %.*s\n",
 376                                 SVCFH_fmt(&argp->fh),
 377                                 argp->len,
 378                                 argp->name);
 379
 380         fh_copy(&resp->fh, &argp->fh);
 381         resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
 382                                    argp->name, argp->len);
 383         fh_unlock(&resp->fh);
 384         return rpc_success;
 385 }
 386
 387 static __be32
 388 nfsd3_proc_rename(struct svc_rqst *rqstp)
 389 {
 390         struct nfsd3_renameargs *argp = rqstp->rq_argp;
 391         struct nfsd3_renameres *resp = rqstp->rq_resp;
 392
 393         dprintk("nfsd: RENAME(3)   %s %.*s ->\n",
 394                                 SVCFH_fmt(&argp->ffh),
 395                                 argp->flen,
 396                                 argp->fname);
 397         dprintk("nfsd: -> %s %.*s\n",
 398                                 SVCFH_fmt(&argp->tfh),
 399                                 argp->tlen,
 400                                 argp->tname);
 401
 402         fh_copy(&resp->ffh, &argp->ffh);
 403         fh_copy(&resp->tfh, &argp->tfh);
 404         resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
 405                                    &resp->tfh, argp->tname, argp->tlen);
 406         return rpc_success;
 407 }
 408
 409 static __be32
 410 nfsd3_proc_link(struct svc_rqst *rqstp)
 411 {
 412         struct nfsd3_linkargs *argp = rqstp->rq_argp;
 413         struct nfsd3_linkres  *resp = rqstp->rq_resp;
 414
 415         dprintk("nfsd: LINK(3)     %s ->\n",
 416                                 SVCFH_fmt(&argp->ffh));
 417         dprintk("nfsd:   -> %s %.*s\n",
 418                                 SVCFH_fmt(&argp->tfh),
 419                                 argp->tlen,
 420                                 argp->tname);
 421
 422         fh_copy(&resp->fh,  &argp->ffh);
 423         fh_copy(&resp->tfh, &argp->tfh);
 424         resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
 425                                  &resp->fh);
 426         return rpc_success;
 427 }
 428
 429 /*
 430  * Read a portion of a directory.
 431  */
 432 static __be32
 433 nfsd3_proc_readdir(struct svc_rqst *rqstp)
 434 {
 435         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 436         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 437         int             count = 0;
 438         struct page     **p;
 439         caddr_t         page_addr = NULL;
 440
 441         dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
 442                                 SVCFH_fmt(&argp->fh),
 443                                 argp->count, (u32) argp->cookie);
 444
 445         /* Make sure we've room for the NULL ptr & eof flag, and shrink to
 446          * client read size */
 447         count = (argp->count >> 2) - 2;
 448
 449         /* Read directory and encode entries on the fly */
 450         fh_copy(&resp->fh, &argp->fh);
 451
 452         resp->buflen = count;
 453         resp->common.err = nfs_ok;
 454         resp->buffer = argp->buffer;
 455         resp->rqstp = rqstp;
 456         resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie,
 457                                     &resp->common, nfs3svc_encode_entry);
 458         memcpy(resp->verf, argp->verf, 8);
 459         count = 0;
 460         for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
 461                 page_addr = page_address(*p);
 462
 463                 if (((caddr_t)resp->buffer >= page_addr) &&
 464                     ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
 465                         count += (caddr_t)resp->buffer - page_addr;
 466                         break;
 467                 }
 468                 count += PAGE_SIZE;
 469         }
 470         resp->count = count >> 2;
 471         if (resp->offset) {
 472                 loff_t offset = argp->cookie;
 473
 474                 if (unlikely(resp->offset1)) {
 475                         /* we ended up with offset on a page boundary */
 476                         *resp->offset = htonl(offset >> 32);
 477                         *resp->offset1 = htonl(offset & 0xffffffff);
 478                         resp->offset1 = NULL;
 479                 } else {
 480                         xdr_encode_hyper(resp->offset, offset);
 481                 }
 482                 resp->offset = NULL;
 483         }
 484
 485         return rpc_success;
 486 }
 487
 488 /*
 489  * Read a portion of a directory, including file handles and attrs.
 490  * For now, we choose to ignore the dircount parameter.
 491  */
 492 static __be32
 493 nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
 494 {
 495         struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 496         struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 497         int     count = 0;
 498         loff_t  offset;
 499         struct page **p;
 500         caddr_t page_addr = NULL;
 501
 502         dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
 503                                 SVCFH_fmt(&argp->fh),
 504                                 argp->count, (u32) argp->cookie);
 505
 506         /* Convert byte count to number of words (i.e. >> 2),
 507          * and reserve room for the NULL ptr & eof flag (-2 words) */
 508         resp->count = (argp->count >> 2) - 2;
 509
 510         /* Read directory and encode entries on the fly */
 511         fh_copy(&resp->fh, &argp->fh);
 512
 513         resp->common.err = nfs_ok;
 514         resp->buffer = argp->buffer;
 515         resp->buflen = resp->count;
 516         resp->rqstp = rqstp;
 517         offset = argp->cookie;
 518
 519         resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
 520         if (resp->status != nfs_ok)
 521                 goto out;
 522
 523         if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
 524                 resp->status = nfserr_notsupp;
 525                 goto out;
 526         }
 527
 528         resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
 529                                     &resp->common, nfs3svc_encode_entry_plus);
 530         memcpy(resp->verf, argp->verf, 8);
 531         for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
 532                 page_addr = page_address(*p);
 533
 534                 if (((caddr_t)resp->buffer >= page_addr) &&
 535                     ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
 536                         count += (caddr_t)resp->buffer - page_addr;
 537                         break;
 538                 }
 539                 count += PAGE_SIZE;
 540         }
 541         resp->count = count >> 2;
 542         if (resp->offset) {
 543                 if (unlikely(resp->offset1)) {
 544                         /* we ended up with offset on a page boundary */
 545                         *resp->offset = htonl(offset >> 32);
 546                         *resp->offset1 = htonl(offset & 0xffffffff);
 547                         resp->offset1 = NULL;
 548                 } else {
 549                         xdr_encode_hyper(resp->offset, offset);
 550                 }
 551                 resp->offset = NULL;
 552         }
 553
 554 out:
 555         return rpc_success;
 556 }
 557
 558 /*
 559  * Get file system stats
 560  */
 561 static __be32
 562 nfsd3_proc_fsstat(struct svc_rqst *rqstp)
 563 {
 564         struct nfsd_fhandle *argp = rqstp->rq_argp;
 565         struct nfsd3_fsstatres *resp = rqstp->rq_resp;
 566
 567         dprintk("nfsd: FSSTAT(3)   %s\n",
 568                                 SVCFH_fmt(&argp->fh));
 569
 570         resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
 571         fh_put(&argp->fh);
 572         return rpc_success;
 573 }
 574
 575 /*
 576  * Get file system info
 577  */
 578 static __be32
 579 nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
 580 {
 581         struct nfsd_fhandle *argp = rqstp->rq_argp;
 582         struct nfsd3_fsinfores *resp = rqstp->rq_resp;
 583         u32     max_blocksize = svc_max_payload(rqstp);
 584
 585         dprintk("nfsd: FSINFO(3)   %s\n",
 586                                 SVCFH_fmt(&argp->fh));
 587
 588         resp->f_rtmax  = max_blocksize;
 589         resp->f_rtpref = max_blocksize;
 590         resp->f_rtmult = PAGE_SIZE;
 591         resp->f_wtmax  = max_blocksize;
 592         resp->f_wtpref = max_blocksize;
 593         resp->f_wtmult = PAGE_SIZE;
 594         resp->f_dtpref = max_blocksize;
 595         resp->f_maxfilesize = ~(u32) 0;
 596         resp->f_properties = NFS3_FSF_DEFAULT;
 597
 598         resp->status = fh_verify(rqstp, &argp->fh, 0,
 599                                  NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
 600
 601         /* Check special features of the file system. May request
 602          * different read/write sizes for file systems known to have
 603          * problems with large blocks */
 604         if (resp->status == nfs_ok) {
 605                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 606
 607                 /* Note that we don't care for remote fs's here */
 608                 if (sb->s_magic == MSDOS_SUPER_MAGIC) {
 609                         resp->f_properties = NFS3_FSF_BILLYBOY;
 610                 }
 611                 resp->f_maxfilesize = sb->s_maxbytes;
 612         }
 613
 614         fh_put(&argp->fh);
 615         return rpc_success;
 616 }
 617
 618 /*
 619  * Get pathconf info for the specified file
 620  */
 621 static __be32
 622 nfsd3_proc_pathconf(struct svc_rqst *rqstp)
 623 {
 624         struct nfsd_fhandle *argp = rqstp->rq_argp;
 625         struct nfsd3_pathconfres *resp = rqstp->rq_resp;
 626
 627         dprintk("nfsd: PATHCONF(3) %s\n",
 628                                 SVCFH_fmt(&argp->fh));
 629
 630         /* Set default pathconf */
 631         resp->p_link_max = 255;         /* at least */
 632         resp->p_name_max = 255;         /* at least */
 633         resp->p_no_trunc = 0;
 634         resp->p_chown_restricted = 1;
 635         resp->p_case_insensitive = 0;
 636         resp->p_case_preserving = 1;
 637
 638         resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
 639
 640         if (resp->status == nfs_ok) {
 641                 struct super_block *sb = argp->fh.fh_dentry->d_sb;
 642
 643                 /* Note that we don't care for remote fs's here */
 644                 switch (sb->s_magic) {
 645                 case EXT2_SUPER_MAGIC:
 646                         resp->p_link_max = EXT2_LINK_MAX;
 647                         resp->p_name_max = EXT2_NAME_LEN;
 648                         break;
 649                 case MSDOS_SUPER_MAGIC:
 650                         resp->p_case_insensitive = 1;
 651                         resp->p_case_preserving  = 0;
 652                         break;
 653                 }
 654         }
 655
 656         fh_put(&argp->fh);
 657         return rpc_success;
 658 }
 659
 660 /*
 661  * Commit a file (range) to stable storage.
 662  */
 663 static __be32
 664 nfsd3_proc_commit(struct svc_rqst *rqstp)
 665 {
 666         struct nfsd3_commitargs *argp = rqstp->rq_argp;
 667         struct nfsd3_commitres *resp = rqstp->rq_resp;
 668
 669         dprintk("nfsd: COMMIT(3)   %s %u@%Lu\n",
 670                                 SVCFH_fmt(&argp->fh),
 671                                 argp->count,
 672                                 (unsigned long long) argp->offset);
 673
 674         if (argp->offset > NFS_OFFSET_MAX) {
 675                 resp->status = nfserr_inval;
 676                 goto out;
 677         }
 678
 679         fh_copy(&resp->fh, &argp->fh);
 680         resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
 681                                    argp->count, resp->verf);
 682 out:
 683         return rpc_success;
 684 }
 685
 686
 687 /*
 688  * NFSv3 Server procedures.
 689  * Only the results of non-idempotent operations are cached.
 690  */
 691 #define nfs3svc_decode_fhandleargs      nfs3svc_decode_fhandle
 692 #define nfs3svc_encode_attrstatres      nfs3svc_encode_attrstat
 693 #define nfs3svc_encode_wccstatres       nfs3svc_encode_wccstat
 694 #define nfsd3_mkdirargs                 nfsd3_createargs
 695 #define nfsd3_readdirplusargs           nfsd3_readdirargs
 696 #define nfsd3_fhandleargs               nfsd_fhandle
 697 #define nfsd3_fhandleres                nfsd3_attrstat
 698 #define nfsd3_attrstatres               nfsd3_attrstat
 699 #define nfsd3_wccstatres                nfsd3_attrstat
 700 #define nfsd3_createres                 nfsd3_diropres
 701 #define nfsd3_voidres                   nfsd3_voidargs
 702 struct nfsd3_voidargs { int dummy; };
 703
 704 #define ST 1            /* status*/
 705 #define FH 17           /* filehandle with length */
 706 #define AT 21           /* attributes */
 707 #define pAT (1+AT)      /* post attributes - conditional */
 708 #define WC (7+pAT)      /* WCC attributes */
 709
 710 static const struct svc_procedure nfsd_procedures3[22] = {
 711         [NFS3PROC_NULL] = {
 712                 .pc_func = nfsd3_proc_null,
 713                 .pc_decode = nfs3svc_decode_voidarg,
 714                 .pc_encode = nfs3svc_encode_voidres,
 715                 .pc_argsize = sizeof(struct nfsd3_voidargs),
 716                 .pc_ressize = sizeof(struct nfsd3_voidres),
 717                 .pc_cachetype = RC_NOCACHE,
 718                 .pc_xdrressize = ST,
 719         },
 720         [NFS3PROC_GETATTR] = {
 721                 .pc_func = nfsd3_proc_getattr,
 722                 .pc_decode = nfs3svc_decode_fhandleargs,
 723                 .pc_encode = nfs3svc_encode_attrstatres,
 724                 .pc_release = nfs3svc_release_fhandle,
 725                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 726                 .pc_ressize = sizeof(struct nfsd3_attrstatres),
 727                 .pc_cachetype = RC_NOCACHE,
 728                 .pc_xdrressize = ST+AT,
 729         },
 730         [NFS3PROC_SETATTR] = {
 731                 .pc_func = nfsd3_proc_setattr,
 732                 .pc_decode = nfs3svc_decode_sattrargs,
 733                 .pc_encode = nfs3svc_encode_wccstatres,
 734                 .pc_release = nfs3svc_release_fhandle,
 735                 .pc_argsize = sizeof(struct nfsd3_sattrargs),
 736                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 737                 .pc_cachetype = RC_REPLBUFF,
 738                 .pc_xdrressize = ST+WC,
 739         },
 740         [NFS3PROC_LOOKUP] = {
 741                 .pc_func = nfsd3_proc_lookup,
 742                 .pc_decode = nfs3svc_decode_diropargs,
 743                 .pc_encode = nfs3svc_encode_diropres,
 744                 .pc_release = nfs3svc_release_fhandle2,
 745                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 746                 .pc_ressize = sizeof(struct nfsd3_diropres),
 747                 .pc_cachetype = RC_NOCACHE,
 748                 .pc_xdrressize = ST+FH+pAT+pAT,
 749         },
 750         [NFS3PROC_ACCESS] = {
 751                 .pc_func = nfsd3_proc_access,
 752                 .pc_decode = nfs3svc_decode_accessargs,
 753                 .pc_encode = nfs3svc_encode_accessres,
 754                 .pc_release = nfs3svc_release_fhandle,
 755                 .pc_argsize = sizeof(struct nfsd3_accessargs),
 756                 .pc_ressize = sizeof(struct nfsd3_accessres),
 757                 .pc_cachetype = RC_NOCACHE,
 758                 .pc_xdrressize = ST+pAT+1,
 759         },
 760         [NFS3PROC_READLINK] = {
 761                 .pc_func = nfsd3_proc_readlink,
 762                 .pc_decode = nfs3svc_decode_readlinkargs,
 763                 .pc_encode = nfs3svc_encode_readlinkres,
 764                 .pc_release = nfs3svc_release_fhandle,
 765                 .pc_argsize = sizeof(struct nfsd3_readlinkargs),
 766                 .pc_ressize = sizeof(struct nfsd3_readlinkres),
 767                 .pc_cachetype = RC_NOCACHE,
 768                 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
 769         },
 770         [NFS3PROC_READ] = {
 771                 .pc_func = nfsd3_proc_read,
 772                 .pc_decode = nfs3svc_decode_readargs,
 773                 .pc_encode = nfs3svc_encode_readres,
 774                 .pc_release = nfs3svc_release_fhandle,
 775                 .pc_argsize = sizeof(struct nfsd3_readargs),
 776                 .pc_ressize = sizeof(struct nfsd3_readres),
 777                 .pc_cachetype = RC_NOCACHE,
 778                 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
 779         },
 780         [NFS3PROC_WRITE] = {
 781                 .pc_func = nfsd3_proc_write,
 782                 .pc_decode = nfs3svc_decode_writeargs,
 783                 .pc_encode = nfs3svc_encode_writeres,
 784                 .pc_release = nfs3svc_release_fhandle,
 785                 .pc_argsize = sizeof(struct nfsd3_writeargs),
 786                 .pc_ressize = sizeof(struct nfsd3_writeres),
 787                 .pc_cachetype = RC_REPLBUFF,
 788                 .pc_xdrressize = ST+WC+4,
 789         },
 790         [NFS3PROC_CREATE] = {
 791                 .pc_func = nfsd3_proc_create,
 792                 .pc_decode = nfs3svc_decode_createargs,
 793                 .pc_encode = nfs3svc_encode_createres,
 794                 .pc_release = nfs3svc_release_fhandle2,
 795                 .pc_argsize = sizeof(struct nfsd3_createargs),
 796                 .pc_ressize = sizeof(struct nfsd3_createres),
 797                 .pc_cachetype = RC_REPLBUFF,
 798                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 799         },
 800         [NFS3PROC_MKDIR] = {
 801                 .pc_func = nfsd3_proc_mkdir,
 802                 .pc_decode = nfs3svc_decode_mkdirargs,
 803                 .pc_encode = nfs3svc_encode_createres,
 804                 .pc_release = nfs3svc_release_fhandle2,
 805                 .pc_argsize = sizeof(struct nfsd3_mkdirargs),
 806                 .pc_ressize = sizeof(struct nfsd3_createres),
 807                 .pc_cachetype = RC_REPLBUFF,
 808                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 809         },
 810         [NFS3PROC_SYMLINK] = {
 811                 .pc_func = nfsd3_proc_symlink,
 812                 .pc_decode = nfs3svc_decode_symlinkargs,
 813                 .pc_encode = nfs3svc_encode_createres,
 814                 .pc_release = nfs3svc_release_fhandle2,
 815                 .pc_argsize = sizeof(struct nfsd3_symlinkargs),
 816                 .pc_ressize = sizeof(struct nfsd3_createres),
 817                 .pc_cachetype = RC_REPLBUFF,
 818                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 819         },
 820         [NFS3PROC_MKNOD] = {
 821                 .pc_func = nfsd3_proc_mknod,
 822                 .pc_decode = nfs3svc_decode_mknodargs,
 823                 .pc_encode = nfs3svc_encode_createres,
 824                 .pc_release = nfs3svc_release_fhandle2,
 825                 .pc_argsize = sizeof(struct nfsd3_mknodargs),
 826                 .pc_ressize = sizeof(struct nfsd3_createres),
 827                 .pc_cachetype = RC_REPLBUFF,
 828                 .pc_xdrressize = ST+(1+FH+pAT)+WC,
 829         },
 830         [NFS3PROC_REMOVE] = {
 831                 .pc_func = nfsd3_proc_remove,
 832                 .pc_decode = nfs3svc_decode_diropargs,
 833                 .pc_encode = nfs3svc_encode_wccstatres,
 834                 .pc_release = nfs3svc_release_fhandle,
 835                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 836                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 837                 .pc_cachetype = RC_REPLBUFF,
 838                 .pc_xdrressize = ST+WC,
 839         },
 840         [NFS3PROC_RMDIR] = {
 841                 .pc_func = nfsd3_proc_rmdir,
 842                 .pc_decode = nfs3svc_decode_diropargs,
 843                 .pc_encode = nfs3svc_encode_wccstatres,
 844                 .pc_release = nfs3svc_release_fhandle,
 845                 .pc_argsize = sizeof(struct nfsd3_diropargs),
 846                 .pc_ressize = sizeof(struct nfsd3_wccstatres),
 847                 .pc_cachetype = RC_REPLBUFF,
 848                 .pc_xdrressize = ST+WC,
 849         },
 850         [NFS3PROC_RENAME] = {
 851                 .pc_func = nfsd3_proc_rename,
 852                 .pc_decode = nfs3svc_decode_renameargs,
 853                 .pc_encode = nfs3svc_encode_renameres,
 854                 .pc_release = nfs3svc_release_fhandle2,
 855                 .pc_argsize = sizeof(struct nfsd3_renameargs),
 856                 .pc_ressize = sizeof(struct nfsd3_renameres),
 857                 .pc_cachetype = RC_REPLBUFF,
 858                 .pc_xdrressize = ST+WC+WC,
 859         },
 860         [NFS3PROC_LINK] = {
 861                 .pc_func = nfsd3_proc_link,
 862                 .pc_decode = nfs3svc_decode_linkargs,
 863                 .pc_encode = nfs3svc_encode_linkres,
 864                 .pc_release = nfs3svc_release_fhandle2,
 865                 .pc_argsize = sizeof(struct nfsd3_linkargs),
 866                 .pc_ressize = sizeof(struct nfsd3_linkres),
 867                 .pc_cachetype = RC_REPLBUFF,
 868                 .pc_xdrressize = ST+pAT+WC,
 869         },
 870         [NFS3PROC_READDIR] = {
 871                 .pc_func = nfsd3_proc_readdir,
 872                 .pc_decode = nfs3svc_decode_readdirargs,
 873                 .pc_encode = nfs3svc_encode_readdirres,
 874                 .pc_release = nfs3svc_release_fhandle,
 875                 .pc_argsize = sizeof(struct nfsd3_readdirargs),
 876                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 877                 .pc_cachetype = RC_NOCACHE,
 878         },
 879         [NFS3PROC_READDIRPLUS] = {
 880                 .pc_func = nfsd3_proc_readdirplus,
 881                 .pc_decode = nfs3svc_decode_readdirplusargs,
 882                 .pc_encode = nfs3svc_encode_readdirres,
 883                 .pc_release = nfs3svc_release_fhandle,
 884                 .pc_argsize = sizeof(struct nfsd3_readdirplusargs),
 885                 .pc_ressize = sizeof(struct nfsd3_readdirres),
 886                 .pc_cachetype = RC_NOCACHE,
 887         },
 888         [NFS3PROC_FSSTAT] = {
 889                 .pc_func = nfsd3_proc_fsstat,
 890                 .pc_decode = nfs3svc_decode_fhandleargs,
 891                 .pc_encode = nfs3svc_encode_fsstatres,
 892                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 893                 .pc_ressize = sizeof(struct nfsd3_fsstatres),
 894                 .pc_cachetype = RC_NOCACHE,
 895                 .pc_xdrressize = ST+pAT+2*6+1,
 896         },
 897         [NFS3PROC_FSINFO] = {
 898                 .pc_func = nfsd3_proc_fsinfo,
 899                 .pc_decode = nfs3svc_decode_fhandleargs,
 900                 .pc_encode = nfs3svc_encode_fsinfores,
 901                 .pc_argsize = sizeof(struct nfsd3_fhandleargs),
 902                 .pc_ressize = sizeof(struct nfsd3_fsinfores),
 903                 .pc_cachetype = RC_NOCACHE,
 904                 .pc_xdrressize = ST+pAT+12,
 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         },
 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         },
 925 };
 926
 927 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
 928 const struct svc_version nfsd_version3 = {
 929         .vs_vers        = 3,
 930         .vs_nproc       = 22,
 931         .vs_proc        = nfsd_procedures3,
 932         .vs_dispatch    = nfsd_dispatch,
 933         .vs_count       = nfsd_count3,
 934         .vs_xdrsize     = NFS3_SVC_XDRSIZE,
 935 };