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 fh_copy(&resp->fh, &argp->fh); 187 resp->committed = argp->stable; 188 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages, 189 &argp->first, cnt); 190 if (!nvecs) { 191 resp->status = nfserr_io; 192 goto out; 193 } 194 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 195 rqstp->rq_vec, nvecs, &cnt, 196 resp->committed, resp->verf); 197 resp->count = cnt; 198 out: 199 return rpc_success; 200 } 201 202 /* 203 * With NFSv3, CREATE processing is a lot easier than with NFSv2. 204 * At least in theory; we'll see how it fares in practice when the 205 * first reports about SunOS compatibility problems start to pour in... 206 */ 207 static __be32 208 nfsd3_proc_create(struct svc_rqst *rqstp) 209 { 210 struct nfsd3_createargs *argp = rqstp->rq_argp; 211 struct nfsd3_diropres *resp = rqstp->rq_resp; 212 svc_fh *dirfhp, *newfhp = NULL; 213 struct iattr *attr; 214 215 dprintk("nfsd: CREATE(3) %s %.*s\n", 216 SVCFH_fmt(&argp->fh), 217 argp->len, 218 argp->name); 219 220 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 221 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 222 attr = &argp->attrs; 223 224 /* Unfudge the mode bits */ 225 attr->ia_mode &= ~S_IFMT; 226 if (!(attr->ia_valid & ATTR_MODE)) { 227 attr->ia_valid |= ATTR_MODE; 228 attr->ia_mode = S_IFREG; 229 } else { 230 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG; 231 } 232 233 /* Now create the file and set attributes */ 234 resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len, 235 attr, newfhp, argp->createmode, 236 (u32 *)argp->verf, NULL, NULL); 237 return rpc_success; 238 } 239 240 /* 241 * Make directory. This operation is not idempotent. 242 */ 243 static __be32 244 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 245 { 246 struct nfsd3_createargs *argp = rqstp->rq_argp; 247 struct nfsd3_diropres *resp = rqstp->rq_resp; 248 249 dprintk("nfsd: MKDIR(3) %s %.*s\n", 250 SVCFH_fmt(&argp->fh), 251 argp->len, 252 argp->name); 253 254 argp->attrs.ia_valid &= ~ATTR_SIZE; 255 fh_copy(&resp->dirfh, &argp->fh); 256 fh_init(&resp->fh, NFS3_FHSIZE); 257 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 258 &argp->attrs, S_IFDIR, 0, &resp->fh); 259 fh_unlock(&resp->dirfh); 260 return rpc_success; 261 } 262 263 static __be32 264 nfsd3_proc_symlink(struct svc_rqst *rqstp) 265 { 266 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 267 struct nfsd3_diropres *resp = rqstp->rq_resp; 268 269 if (argp->tlen == 0) { 270 resp->status = nfserr_inval; 271 goto out; 272 } 273 if (argp->tlen > NFS3_MAXPATHLEN) { 274 resp->status = nfserr_nametoolong; 275 goto out; 276 } 277 278 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 279 page_address(rqstp->rq_arg.pages[0]), 280 argp->tlen); 281 if (IS_ERR(argp->tname)) { 282 resp->status = nfserrno(PTR_ERR(argp->tname)); 283 goto out; 284 } 285 286 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 287 SVCFH_fmt(&argp->ffh), 288 argp->flen, argp->fname, 289 argp->tlen, argp->tname); 290 291 fh_copy(&resp->dirfh, &argp->ffh); 292 fh_init(&resp->fh, NFS3_FHSIZE); 293 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 294 argp->flen, argp->tname, &resp->fh); 295 kfree(argp->tname); 296 out: 297 return rpc_success; 298 } 299 300 /* 301 * Make socket/fifo/device. 302 */ 303 static __be32 304 nfsd3_proc_mknod(struct svc_rqst *rqstp) 305 { 306 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 307 struct nfsd3_diropres *resp = rqstp->rq_resp; 308 int type; 309 dev_t rdev = 0; 310 311 dprintk("nfsd: MKNOD(3) %s %.*s\n", 312 SVCFH_fmt(&argp->fh), 313 argp->len, 314 argp->name); 315 316 fh_copy(&resp->dirfh, &argp->fh); 317 fh_init(&resp->fh, NFS3_FHSIZE); 318 319 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 320 rdev = MKDEV(argp->major, argp->minor); 321 if (MAJOR(rdev) != argp->major || 322 MINOR(rdev) != argp->minor) { 323 resp->status = nfserr_inval; 324 goto out; 325 } 326 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 327 resp->status = nfserr_badtype; 328 goto out; 329 } 330 331 type = nfs3_ftypes[argp->ftype]; 332 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 333 &argp->attrs, type, rdev, &resp->fh); 334 fh_unlock(&resp->dirfh); 335 out: 336 return rpc_success; 337 } 338 339 /* 340 * Remove file/fifo/socket etc. 341 */ 342 static __be32 343 nfsd3_proc_remove(struct svc_rqst *rqstp) 344 { 345 struct nfsd3_diropargs *argp = rqstp->rq_argp; 346 struct nfsd3_attrstat *resp = rqstp->rq_resp; 347 348 dprintk("nfsd: REMOVE(3) %s %.*s\n", 349 SVCFH_fmt(&argp->fh), 350 argp->len, 351 argp->name); 352 353 /* Unlink. -S_IFDIR means file must not be a directory */ 354 fh_copy(&resp->fh, &argp->fh); 355 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 356 argp->name, argp->len); 357 fh_unlock(&resp->fh); 358 return rpc_success; 359 } 360 361 /* 362 * Remove a directory 363 */ 364 static __be32 365 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 366 { 367 struct nfsd3_diropargs *argp = rqstp->rq_argp; 368 struct nfsd3_attrstat *resp = rqstp->rq_resp; 369 370 dprintk("nfsd: RMDIR(3) %s %.*s\n", 371 SVCFH_fmt(&argp->fh), 372 argp->len, 373 argp->name); 374 375 fh_copy(&resp->fh, &argp->fh); 376 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 377 argp->name, argp->len); 378 fh_unlock(&resp->fh); 379 return rpc_success; 380 } 381 382 static __be32 383 nfsd3_proc_rename(struct svc_rqst *rqstp) 384 { 385 struct nfsd3_renameargs *argp = rqstp->rq_argp; 386 struct nfsd3_renameres *resp = rqstp->rq_resp; 387 388 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 389 SVCFH_fmt(&argp->ffh), 390 argp->flen, 391 argp->fname); 392 dprintk("nfsd: -> %s %.*s\n", 393 SVCFH_fmt(&argp->tfh), 394 argp->tlen, 395 argp->tname); 396 397 fh_copy(&resp->ffh, &argp->ffh); 398 fh_copy(&resp->tfh, &argp->tfh); 399 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 400 &resp->tfh, argp->tname, argp->tlen); 401 return rpc_success; 402 } 403 404 static __be32 405 nfsd3_proc_link(struct svc_rqst *rqstp) 406 { 407 struct nfsd3_linkargs *argp = rqstp->rq_argp; 408 struct nfsd3_linkres *resp = rqstp->rq_resp; 409 410 dprintk("nfsd: LINK(3) %s ->\n", 411 SVCFH_fmt(&argp->ffh)); 412 dprintk("nfsd: -> %s %.*s\n", 413 SVCFH_fmt(&argp->tfh), 414 argp->tlen, 415 argp->tname); 416 417 fh_copy(&resp->fh, &argp->ffh); 418 fh_copy(&resp->tfh, &argp->tfh); 419 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 420 &resp->fh); 421 return rpc_success; 422 } 423 424 /* 425 * Read a portion of a directory. 426 */ 427 static __be32 428 nfsd3_proc_readdir(struct svc_rqst *rqstp) 429 { 430 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 431 struct nfsd3_readdirres *resp = rqstp->rq_resp; 432 int count = 0; 433 struct page **p; 434 caddr_t page_addr = NULL; 435 436 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 437 SVCFH_fmt(&argp->fh), 438 argp->count, (u32) argp->cookie); 439 440 /* Make sure we've room for the NULL ptr & eof flag, and shrink to 441 * client read size */ 442 count = (argp->count >> 2) - 2; 443 444 /* Read directory and encode entries on the fly */ 445 fh_copy(&resp->fh, &argp->fh); 446 447 resp->buflen = count; 448 resp->common.err = nfs_ok; 449 resp->buffer = argp->buffer; 450 resp->rqstp = rqstp; 451 resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie, 452 &resp->common, nfs3svc_encode_entry); 453 memcpy(resp->verf, argp->verf, 8); 454 count = 0; 455 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { 456 page_addr = page_address(*p); 457 458 if (((caddr_t)resp->buffer >= page_addr) && 459 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { 460 count += (caddr_t)resp->buffer - page_addr; 461 break; 462 } 463 count += PAGE_SIZE; 464 } 465 resp->count = count >> 2; 466 if (resp->offset) { 467 loff_t offset = argp->cookie; 468 469 if (unlikely(resp->offset1)) { 470 /* we ended up with offset on a page boundary */ 471 *resp->offset = htonl(offset >> 32); 472 *resp->offset1 = htonl(offset & 0xffffffff); 473 resp->offset1 = NULL; 474 } else { 475 xdr_encode_hyper(resp->offset, offset); 476 } 477 resp->offset = NULL; 478 } 479 480 return rpc_success; 481 } 482 483 /* 484 * Read a portion of a directory, including file handles and attrs. 485 * For now, we choose to ignore the dircount parameter. 486 */ 487 static __be32 488 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 489 { 490 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 491 struct nfsd3_readdirres *resp = rqstp->rq_resp; 492 int count = 0; 493 loff_t offset; 494 struct page **p; 495 caddr_t page_addr = NULL; 496 497 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 498 SVCFH_fmt(&argp->fh), 499 argp->count, (u32) argp->cookie); 500 501 /* Convert byte count to number of words (i.e. >> 2), 502 * and reserve room for the NULL ptr & eof flag (-2 words) */ 503 resp->count = (argp->count >> 2) - 2; 504 505 /* Read directory and encode entries on the fly */ 506 fh_copy(&resp->fh, &argp->fh); 507 508 resp->common.err = nfs_ok; 509 resp->buffer = argp->buffer; 510 resp->buflen = resp->count; 511 resp->rqstp = rqstp; 512 offset = argp->cookie; 513 514 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 515 if (resp->status != nfs_ok) 516 goto out; 517 518 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 519 resp->status = nfserr_notsupp; 520 goto out; 521 } 522 523 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 524 &resp->common, nfs3svc_encode_entry_plus); 525 memcpy(resp->verf, argp->verf, 8); 526 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { 527 page_addr = page_address(*p); 528 529 if (((caddr_t)resp->buffer >= page_addr) && 530 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { 531 count += (caddr_t)resp->buffer - page_addr; 532 break; 533 } 534 count += PAGE_SIZE; 535 } 536 resp->count = count >> 2; 537 if (resp->offset) { 538 if (unlikely(resp->offset1)) { 539 /* we ended up with offset on a page boundary */ 540 *resp->offset = htonl(offset >> 32); 541 *resp->offset1 = htonl(offset & 0xffffffff); 542 resp->offset1 = NULL; 543 } else { 544 xdr_encode_hyper(resp->offset, offset); 545 } 546 resp->offset = NULL; 547 } 548 549 out: 550 return rpc_success; 551 } 552 553 /* 554 * Get file system stats 555 */ 556 static __be32 557 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 558 { 559 struct nfsd_fhandle *argp = rqstp->rq_argp; 560 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 561 562 dprintk("nfsd: FSSTAT(3) %s\n", 563 SVCFH_fmt(&argp->fh)); 564 565 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 566 fh_put(&argp->fh); 567 return rpc_success; 568 } 569 570 /* 571 * Get file system info 572 */ 573 static __be32 574 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 575 { 576 struct nfsd_fhandle *argp = rqstp->rq_argp; 577 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 578 u32 max_blocksize = svc_max_payload(rqstp); 579 580 dprintk("nfsd: FSINFO(3) %s\n", 581 SVCFH_fmt(&argp->fh)); 582 583 resp->f_rtmax = max_blocksize; 584 resp->f_rtpref = max_blocksize; 585 resp->f_rtmult = PAGE_SIZE; 586 resp->f_wtmax = max_blocksize; 587 resp->f_wtpref = max_blocksize; 588 resp->f_wtmult = PAGE_SIZE; 589 resp->f_dtpref = max_blocksize; 590 resp->f_maxfilesize = ~(u32) 0; 591 resp->f_properties = NFS3_FSF_DEFAULT; 592 593 resp->status = fh_verify(rqstp, &argp->fh, 0, 594 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 595 596 /* Check special features of the file system. May request 597 * different read/write sizes for file systems known to have 598 * problems with large blocks */ 599 if (resp->status == nfs_ok) { 600 struct super_block *sb = argp->fh.fh_dentry->d_sb; 601 602 /* Note that we don't care for remote fs's here */ 603 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 604 resp->f_properties = NFS3_FSF_BILLYBOY; 605 } 606 resp->f_maxfilesize = sb->s_maxbytes; 607 } 608 609 fh_put(&argp->fh); 610 return rpc_success; 611 } 612 613 /* 614 * Get pathconf info for the specified file 615 */ 616 static __be32 617 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 618 { 619 struct nfsd_fhandle *argp = rqstp->rq_argp; 620 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 621 622 dprintk("nfsd: PATHCONF(3) %s\n", 623 SVCFH_fmt(&argp->fh)); 624 625 /* Set default pathconf */ 626 resp->p_link_max = 255; /* at least */ 627 resp->p_name_max = 255; /* at least */ 628 resp->p_no_trunc = 0; 629 resp->p_chown_restricted = 1; 630 resp->p_case_insensitive = 0; 631 resp->p_case_preserving = 1; 632 633 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 634 635 if (resp->status == nfs_ok) { 636 struct super_block *sb = argp->fh.fh_dentry->d_sb; 637 638 /* Note that we don't care for remote fs's here */ 639 switch (sb->s_magic) { 640 case EXT2_SUPER_MAGIC: 641 resp->p_link_max = EXT2_LINK_MAX; 642 resp->p_name_max = EXT2_NAME_LEN; 643 break; 644 case MSDOS_SUPER_MAGIC: 645 resp->p_case_insensitive = 1; 646 resp->p_case_preserving = 0; 647 break; 648 } 649 } 650 651 fh_put(&argp->fh); 652 return rpc_success; 653 } 654 655 /* 656 * Commit a file (range) to stable storage. 657 */ 658 static __be32 659 nfsd3_proc_commit(struct svc_rqst *rqstp) 660 { 661 struct nfsd3_commitargs *argp = rqstp->rq_argp; 662 struct nfsd3_commitres *resp = rqstp->rq_resp; 663 664 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 665 SVCFH_fmt(&argp->fh), 666 argp->count, 667 (unsigned long long) argp->offset); 668 669 if (argp->offset > NFS_OFFSET_MAX) { 670 resp->status = nfserr_inval; 671 goto out; 672 } 673 674 fh_copy(&resp->fh, &argp->fh); 675 resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset, 676 argp->count, resp->verf); 677 out: 678 return rpc_success; 679 } 680 681 682 /* 683 * NFSv3 Server procedures. 684 * Only the results of non-idempotent operations are cached. 685 */ 686 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle 687 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 688 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 689 #define nfsd3_mkdirargs nfsd3_createargs 690 #define nfsd3_readdirplusargs nfsd3_readdirargs 691 #define nfsd3_fhandleargs nfsd_fhandle 692 #define nfsd3_attrstatres nfsd3_attrstat 693 #define nfsd3_wccstatres nfsd3_attrstat 694 #define nfsd3_createres nfsd3_diropres 695 696 #define ST 1 /* status*/ 697 #define FH 17 /* filehandle with length */ 698 #define AT 21 /* attributes */ 699 #define pAT (1+AT) /* post attributes - conditional */ 700 #define WC (7+pAT) /* WCC attributes */ 701 702 static const struct svc_procedure nfsd_procedures3[22] = { 703 [NFS3PROC_NULL] = { 704 .pc_func = nfsd3_proc_null, 705 .pc_decode = nfssvc_decode_voidarg, 706 .pc_encode = nfssvc_encode_voidres, 707 .pc_argsize = sizeof(struct nfsd_voidargs), 708 .pc_ressize = sizeof(struct nfsd_voidres), 709 .pc_cachetype = RC_NOCACHE, 710 .pc_xdrressize = ST, 711 }, 712 [NFS3PROC_GETATTR] = { 713 .pc_func = nfsd3_proc_getattr, 714 .pc_decode = nfs3svc_decode_fhandleargs, 715 .pc_encode = nfs3svc_encode_attrstatres, 716 .pc_release = nfs3svc_release_fhandle, 717 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 718 .pc_ressize = sizeof(struct nfsd3_attrstatres), 719 .pc_cachetype = RC_NOCACHE, 720 .pc_xdrressize = ST+AT, 721 }, 722 [NFS3PROC_SETATTR] = { 723 .pc_func = nfsd3_proc_setattr, 724 .pc_decode = nfs3svc_decode_sattrargs, 725 .pc_encode = nfs3svc_encode_wccstatres, 726 .pc_release = nfs3svc_release_fhandle, 727 .pc_argsize = sizeof(struct nfsd3_sattrargs), 728 .pc_ressize = sizeof(struct nfsd3_wccstatres), 729 .pc_cachetype = RC_REPLBUFF, 730 .pc_xdrressize = ST+WC, 731 }, 732 [NFS3PROC_LOOKUP] = { 733 .pc_func = nfsd3_proc_lookup, 734 .pc_decode = nfs3svc_decode_diropargs, 735 .pc_encode = nfs3svc_encode_diropres, 736 .pc_release = nfs3svc_release_fhandle2, 737 .pc_argsize = sizeof(struct nfsd3_diropargs), 738 .pc_ressize = sizeof(struct nfsd3_diropres), 739 .pc_cachetype = RC_NOCACHE, 740 .pc_xdrressize = ST+FH+pAT+pAT, 741 }, 742 [NFS3PROC_ACCESS] = { 743 .pc_func = nfsd3_proc_access, 744 .pc_decode = nfs3svc_decode_accessargs, 745 .pc_encode = nfs3svc_encode_accessres, 746 .pc_release = nfs3svc_release_fhandle, 747 .pc_argsize = sizeof(struct nfsd3_accessargs), 748 .pc_ressize = sizeof(struct nfsd3_accessres), 749 .pc_cachetype = RC_NOCACHE, 750 .pc_xdrressize = ST+pAT+1, 751 }, 752 [NFS3PROC_READLINK] = { 753 .pc_func = nfsd3_proc_readlink, 754 .pc_decode = nfs3svc_decode_readlinkargs, 755 .pc_encode = nfs3svc_encode_readlinkres, 756 .pc_release = nfs3svc_release_fhandle, 757 .pc_argsize = sizeof(struct nfsd3_readlinkargs), 758 .pc_ressize = sizeof(struct nfsd3_readlinkres), 759 .pc_cachetype = RC_NOCACHE, 760 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 761 }, 762 [NFS3PROC_READ] = { 763 .pc_func = nfsd3_proc_read, 764 .pc_decode = nfs3svc_decode_readargs, 765 .pc_encode = nfs3svc_encode_readres, 766 .pc_release = nfs3svc_release_fhandle, 767 .pc_argsize = sizeof(struct nfsd3_readargs), 768 .pc_ressize = sizeof(struct nfsd3_readres), 769 .pc_cachetype = RC_NOCACHE, 770 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 771 }, 772 [NFS3PROC_WRITE] = { 773 .pc_func = nfsd3_proc_write, 774 .pc_decode = nfs3svc_decode_writeargs, 775 .pc_encode = nfs3svc_encode_writeres, 776 .pc_release = nfs3svc_release_fhandle, 777 .pc_argsize = sizeof(struct nfsd3_writeargs), 778 .pc_ressize = sizeof(struct nfsd3_writeres), 779 .pc_cachetype = RC_REPLBUFF, 780 .pc_xdrressize = ST+WC+4, 781 }, 782 [NFS3PROC_CREATE] = { 783 .pc_func = nfsd3_proc_create, 784 .pc_decode = nfs3svc_decode_createargs, 785 .pc_encode = nfs3svc_encode_createres, 786 .pc_release = nfs3svc_release_fhandle2, 787 .pc_argsize = sizeof(struct nfsd3_createargs), 788 .pc_ressize = sizeof(struct nfsd3_createres), 789 .pc_cachetype = RC_REPLBUFF, 790 .pc_xdrressize = ST+(1+FH+pAT)+WC, 791 }, 792 [NFS3PROC_MKDIR] = { 793 .pc_func = nfsd3_proc_mkdir, 794 .pc_decode = nfs3svc_decode_mkdirargs, 795 .pc_encode = nfs3svc_encode_createres, 796 .pc_release = nfs3svc_release_fhandle2, 797 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 798 .pc_ressize = sizeof(struct nfsd3_createres), 799 .pc_cachetype = RC_REPLBUFF, 800 .pc_xdrressize = ST+(1+FH+pAT)+WC, 801 }, 802 [NFS3PROC_SYMLINK] = { 803 .pc_func = nfsd3_proc_symlink, 804 .pc_decode = nfs3svc_decode_symlinkargs, 805 .pc_encode = nfs3svc_encode_createres, 806 .pc_release = nfs3svc_release_fhandle2, 807 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 808 .pc_ressize = sizeof(struct nfsd3_createres), 809 .pc_cachetype = RC_REPLBUFF, 810 .pc_xdrressize = ST+(1+FH+pAT)+WC, 811 }, 812 [NFS3PROC_MKNOD] = { 813 .pc_func = nfsd3_proc_mknod, 814 .pc_decode = nfs3svc_decode_mknodargs, 815 .pc_encode = nfs3svc_encode_createres, 816 .pc_release = nfs3svc_release_fhandle2, 817 .pc_argsize = sizeof(struct nfsd3_mknodargs), 818 .pc_ressize = sizeof(struct nfsd3_createres), 819 .pc_cachetype = RC_REPLBUFF, 820 .pc_xdrressize = ST+(1+FH+pAT)+WC, 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 }, 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 }, 842 [NFS3PROC_RENAME] = { 843 .pc_func = nfsd3_proc_rename, 844 .pc_decode = nfs3svc_decode_renameargs, 845 .pc_encode = nfs3svc_encode_renameres, 846 .pc_release = nfs3svc_release_fhandle2, 847 .pc_argsize = sizeof(struct nfsd3_renameargs), 848 .pc_ressize = sizeof(struct nfsd3_renameres), 849 .pc_cachetype = RC_REPLBUFF, 850 .pc_xdrressize = ST+WC+WC, 851 }, 852 [NFS3PROC_LINK] = { 853 .pc_func = nfsd3_proc_link, 854 .pc_decode = nfs3svc_decode_linkargs, 855 .pc_encode = nfs3svc_encode_linkres, 856 .pc_release = nfs3svc_release_fhandle2, 857 .pc_argsize = sizeof(struct nfsd3_linkargs), 858 .pc_ressize = sizeof(struct nfsd3_linkres), 859 .pc_cachetype = RC_REPLBUFF, 860 .pc_xdrressize = ST+pAT+WC, 861 }, 862 [NFS3PROC_READDIR] = { 863 .pc_func = nfsd3_proc_readdir, 864 .pc_decode = nfs3svc_decode_readdirargs, 865 .pc_encode = nfs3svc_encode_readdirres, 866 .pc_release = nfs3svc_release_fhandle, 867 .pc_argsize = sizeof(struct nfsd3_readdirargs), 868 .pc_ressize = sizeof(struct nfsd3_readdirres), 869 .pc_cachetype = RC_NOCACHE, 870 }, 871 [NFS3PROC_READDIRPLUS] = { 872 .pc_func = nfsd3_proc_readdirplus, 873 .pc_decode = nfs3svc_decode_readdirplusargs, 874 .pc_encode = nfs3svc_encode_readdirres, 875 .pc_release = nfs3svc_release_fhandle, 876 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 877 .pc_ressize = sizeof(struct nfsd3_readdirres), 878 .pc_cachetype = RC_NOCACHE, 879 }, 880 [NFS3PROC_FSSTAT] = { 881 .pc_func = nfsd3_proc_fsstat, 882 .pc_decode = nfs3svc_decode_fhandleargs, 883 .pc_encode = nfs3svc_encode_fsstatres, 884 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 885 .pc_ressize = sizeof(struct nfsd3_fsstatres), 886 .pc_cachetype = RC_NOCACHE, 887 .pc_xdrressize = ST+pAT+2*6+1, 888 }, 889 [NFS3PROC_FSINFO] = { 890 .pc_func = nfsd3_proc_fsinfo, 891 .pc_decode = nfs3svc_decode_fhandleargs, 892 .pc_encode = nfs3svc_encode_fsinfores, 893 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 894 .pc_ressize = sizeof(struct nfsd3_fsinfores), 895 .pc_cachetype = RC_NOCACHE, 896 .pc_xdrressize = ST+pAT+12, 897 }, 898 [NFS3PROC_PATHCONF] = { 899 .pc_func = nfsd3_proc_pathconf, 900 .pc_decode = nfs3svc_decode_fhandleargs, 901 .pc_encode = nfs3svc_encode_pathconfres, 902 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 903 .pc_ressize = sizeof(struct nfsd3_pathconfres), 904 .pc_cachetype = RC_NOCACHE, 905 .pc_xdrressize = ST+pAT+6, 906 }, 907 [NFS3PROC_COMMIT] = { 908 .pc_func = nfsd3_proc_commit, 909 .pc_decode = nfs3svc_decode_commitargs, 910 .pc_encode = nfs3svc_encode_commitres, 911 .pc_release = nfs3svc_release_fhandle, 912 .pc_argsize = sizeof(struct nfsd3_commitargs), 913 .pc_ressize = sizeof(struct nfsd3_commitres), 914 .pc_cachetype = RC_NOCACHE, 915 .pc_xdrressize = ST+WC+2, 916 }, 917 }; 918 919 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]; 920 const struct svc_version nfsd_version3 = { 921 .vs_vers = 3, 922 .vs_nproc = 22, 923 .vs_proc = nfsd_procedures3, 924 .vs_dispatch = nfsd_dispatch, 925 .vs_count = nfsd_count3, 926 .vs_xdrsize = NFS3_SVC_XDRSIZE, 927 }; 928