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 #define RETURN_STATUS(st) { resp->status = (st); return (st); } 19 20 static int nfs3_ftypes[] = { 21 0, /* NF3NON */ 22 S_IFREG, /* NF3REG */ 23 S_IFDIR, /* NF3DIR */ 24 S_IFBLK, /* NF3BLK */ 25 S_IFCHR, /* NF3CHR */ 26 S_IFLNK, /* NF3LNK */ 27 S_IFSOCK, /* NF3SOCK */ 28 S_IFIFO, /* NF3FIFO */ 29 }; 30 31 /* 32 * NULL call. 33 */ 34 static __be32 35 nfsd3_proc_null(struct svc_rqst *rqstp) 36 { 37 return nfs_ok; 38 } 39 40 /* 41 * Get a file's attributes 42 */ 43 static __be32 44 nfsd3_proc_getattr(struct svc_rqst *rqstp) 45 { 46 struct nfsd_fhandle *argp = rqstp->rq_argp; 47 struct nfsd3_attrstat *resp = rqstp->rq_resp; 48 __be32 nfserr; 49 50 dprintk("nfsd: GETATTR(3) %s\n", 51 SVCFH_fmt(&argp->fh)); 52 53 fh_copy(&resp->fh, &argp->fh); 54 nfserr = fh_verify(rqstp, &resp->fh, 0, 55 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 56 if (nfserr) 57 RETURN_STATUS(nfserr); 58 59 nfserr = fh_getattr(&resp->fh, &resp->stat); 60 61 RETURN_STATUS(nfserr); 62 } 63 64 /* 65 * Set a file's attributes 66 */ 67 static __be32 68 nfsd3_proc_setattr(struct svc_rqst *rqstp) 69 { 70 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 71 struct nfsd3_attrstat *resp = rqstp->rq_resp; 72 __be32 nfserr; 73 74 dprintk("nfsd: SETATTR(3) %s\n", 75 SVCFH_fmt(&argp->fh)); 76 77 fh_copy(&resp->fh, &argp->fh); 78 nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs, 79 argp->check_guard, argp->guardtime); 80 RETURN_STATUS(nfserr); 81 } 82 83 /* 84 * Look up a path name component 85 */ 86 static __be32 87 nfsd3_proc_lookup(struct svc_rqst *rqstp) 88 { 89 struct nfsd3_diropargs *argp = rqstp->rq_argp; 90 struct nfsd3_diropres *resp = rqstp->rq_resp; 91 __be32 nfserr; 92 93 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 94 SVCFH_fmt(&argp->fh), 95 argp->len, 96 argp->name); 97 98 fh_copy(&resp->dirfh, &argp->fh); 99 fh_init(&resp->fh, NFS3_FHSIZE); 100 101 nfserr = nfsd_lookup(rqstp, &resp->dirfh, 102 argp->name, 103 argp->len, 104 &resp->fh); 105 RETURN_STATUS(nfserr); 106 } 107 108 /* 109 * Check file access 110 */ 111 static __be32 112 nfsd3_proc_access(struct svc_rqst *rqstp) 113 { 114 struct nfsd3_accessargs *argp = rqstp->rq_argp; 115 struct nfsd3_accessres *resp = rqstp->rq_resp; 116 __be32 nfserr; 117 118 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 119 SVCFH_fmt(&argp->fh), 120 argp->access); 121 122 fh_copy(&resp->fh, &argp->fh); 123 resp->access = argp->access; 124 nfserr = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 125 RETURN_STATUS(nfserr); 126 } 127 128 /* 129 * Read a symlink. 130 */ 131 static __be32 132 nfsd3_proc_readlink(struct svc_rqst *rqstp) 133 { 134 struct nfsd3_readlinkargs *argp = rqstp->rq_argp; 135 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 136 __be32 nfserr; 137 138 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 139 140 /* Read the symlink. */ 141 fh_copy(&resp->fh, &argp->fh); 142 resp->len = NFS3_MAXPATHLEN; 143 nfserr = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len); 144 RETURN_STATUS(nfserr); 145 } 146 147 /* 148 * Read a portion of a file. 149 */ 150 static __be32 151 nfsd3_proc_read(struct svc_rqst *rqstp) 152 { 153 struct nfsd3_readargs *argp = rqstp->rq_argp; 154 struct nfsd3_readres *resp = rqstp->rq_resp; 155 __be32 nfserr; 156 u32 max_blocksize = svc_max_payload(rqstp); 157 unsigned long cnt = min(argp->count, max_blocksize); 158 159 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 160 SVCFH_fmt(&argp->fh), 161 (unsigned long) argp->count, 162 (unsigned long long) argp->offset); 163 164 /* Obtain buffer pointer for payload. 165 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 166 * + 1 (xdr opaque byte count) = 26 167 */ 168 resp->count = cnt; 169 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); 170 171 fh_copy(&resp->fh, &argp->fh); 172 nfserr = nfsd_read(rqstp, &resp->fh, 173 argp->offset, 174 rqstp->rq_vec, argp->vlen, 175 &resp->count); 176 if (nfserr == 0) { 177 struct inode *inode = d_inode(resp->fh.fh_dentry); 178 resp->eof = nfsd_eof_on_read(cnt, resp->count, argp->offset, 179 inode->i_size); 180 } 181 182 RETURN_STATUS(nfserr); 183 } 184 185 /* 186 * Write data to a file 187 */ 188 static __be32 189 nfsd3_proc_write(struct svc_rqst *rqstp) 190 { 191 struct nfsd3_writeargs *argp = rqstp->rq_argp; 192 struct nfsd3_writeres *resp = rqstp->rq_resp; 193 __be32 nfserr; 194 unsigned long cnt = argp->len; 195 unsigned int nvecs; 196 197 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 198 SVCFH_fmt(&argp->fh), 199 argp->len, 200 (unsigned long long) argp->offset, 201 argp->stable? " stable" : ""); 202 203 fh_copy(&resp->fh, &argp->fh); 204 resp->committed = argp->stable; 205 nvecs = svc_fill_write_vector(rqstp, &argp->first, cnt); 206 if (!nvecs) 207 RETURN_STATUS(nfserr_io); 208 nfserr = nfsd_write(rqstp, &resp->fh, argp->offset, 209 rqstp->rq_vec, nvecs, &cnt, 210 resp->committed); 211 resp->count = cnt; 212 RETURN_STATUS(nfserr); 213 } 214 215 /* 216 * With NFSv3, CREATE processing is a lot easier than with NFSv2. 217 * At least in theory; we'll see how it fares in practice when the 218 * first reports about SunOS compatibility problems start to pour in... 219 */ 220 static __be32 221 nfsd3_proc_create(struct svc_rqst *rqstp) 222 { 223 struct nfsd3_createargs *argp = rqstp->rq_argp; 224 struct nfsd3_diropres *resp = rqstp->rq_resp; 225 svc_fh *dirfhp, *newfhp = NULL; 226 struct iattr *attr; 227 __be32 nfserr; 228 229 dprintk("nfsd: CREATE(3) %s %.*s\n", 230 SVCFH_fmt(&argp->fh), 231 argp->len, 232 argp->name); 233 234 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 235 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 236 attr = &argp->attrs; 237 238 /* Unfudge the mode bits */ 239 attr->ia_mode &= ~S_IFMT; 240 if (!(attr->ia_valid & ATTR_MODE)) { 241 attr->ia_valid |= ATTR_MODE; 242 attr->ia_mode = S_IFREG; 243 } else { 244 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG; 245 } 246 247 /* Now create the file and set attributes */ 248 nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len, 249 attr, newfhp, 250 argp->createmode, (u32 *)argp->verf, NULL, NULL); 251 252 RETURN_STATUS(nfserr); 253 } 254 255 /* 256 * Make directory. This operation is not idempotent. 257 */ 258 static __be32 259 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 260 { 261 struct nfsd3_createargs *argp = rqstp->rq_argp; 262 struct nfsd3_diropres *resp = rqstp->rq_resp; 263 __be32 nfserr; 264 265 dprintk("nfsd: MKDIR(3) %s %.*s\n", 266 SVCFH_fmt(&argp->fh), 267 argp->len, 268 argp->name); 269 270 argp->attrs.ia_valid &= ~ATTR_SIZE; 271 fh_copy(&resp->dirfh, &argp->fh); 272 fh_init(&resp->fh, NFS3_FHSIZE); 273 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 274 &argp->attrs, S_IFDIR, 0, &resp->fh); 275 fh_unlock(&resp->dirfh); 276 RETURN_STATUS(nfserr); 277 } 278 279 static __be32 280 nfsd3_proc_symlink(struct svc_rqst *rqstp) 281 { 282 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 283 struct nfsd3_diropres *resp = rqstp->rq_resp; 284 __be32 nfserr; 285 286 if (argp->tlen == 0) 287 RETURN_STATUS(nfserr_inval); 288 if (argp->tlen > NFS3_MAXPATHLEN) 289 RETURN_STATUS(nfserr_nametoolong); 290 291 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 292 argp->tlen); 293 if (IS_ERR(argp->tname)) 294 RETURN_STATUS(nfserrno(PTR_ERR(argp->tname))); 295 296 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 297 SVCFH_fmt(&argp->ffh), 298 argp->flen, argp->fname, 299 argp->tlen, argp->tname); 300 301 fh_copy(&resp->dirfh, &argp->ffh); 302 fh_init(&resp->fh, NFS3_FHSIZE); 303 nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen, 304 argp->tname, &resp->fh); 305 RETURN_STATUS(nfserr); 306 } 307 308 /* 309 * Make socket/fifo/device. 310 */ 311 static __be32 312 nfsd3_proc_mknod(struct svc_rqst *rqstp) 313 { 314 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 315 struct nfsd3_diropres *resp = rqstp->rq_resp; 316 __be32 nfserr; 317 int type; 318 dev_t rdev = 0; 319 320 dprintk("nfsd: MKNOD(3) %s %.*s\n", 321 SVCFH_fmt(&argp->fh), 322 argp->len, 323 argp->name); 324 325 fh_copy(&resp->dirfh, &argp->fh); 326 fh_init(&resp->fh, NFS3_FHSIZE); 327 328 if (argp->ftype == 0 || argp->ftype >= NF3BAD) 329 RETURN_STATUS(nfserr_inval); 330 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 331 rdev = MKDEV(argp->major, argp->minor); 332 if (MAJOR(rdev) != argp->major || 333 MINOR(rdev) != argp->minor) 334 RETURN_STATUS(nfserr_inval); 335 } else 336 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) 337 RETURN_STATUS(nfserr_inval); 338 339 type = nfs3_ftypes[argp->ftype]; 340 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 341 &argp->attrs, type, rdev, &resp->fh); 342 fh_unlock(&resp->dirfh); 343 RETURN_STATUS(nfserr); 344 } 345 346 /* 347 * Remove file/fifo/socket etc. 348 */ 349 static __be32 350 nfsd3_proc_remove(struct svc_rqst *rqstp) 351 { 352 struct nfsd3_diropargs *argp = rqstp->rq_argp; 353 struct nfsd3_attrstat *resp = rqstp->rq_resp; 354 __be32 nfserr; 355 356 dprintk("nfsd: REMOVE(3) %s %.*s\n", 357 SVCFH_fmt(&argp->fh), 358 argp->len, 359 argp->name); 360 361 /* Unlink. -S_IFDIR means file must not be a directory */ 362 fh_copy(&resp->fh, &argp->fh); 363 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len); 364 fh_unlock(&resp->fh); 365 RETURN_STATUS(nfserr); 366 } 367 368 /* 369 * Remove a directory 370 */ 371 static __be32 372 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 373 { 374 struct nfsd3_diropargs *argp = rqstp->rq_argp; 375 struct nfsd3_attrstat *resp = rqstp->rq_resp; 376 __be32 nfserr; 377 378 dprintk("nfsd: RMDIR(3) %s %.*s\n", 379 SVCFH_fmt(&argp->fh), 380 argp->len, 381 argp->name); 382 383 fh_copy(&resp->fh, &argp->fh); 384 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len); 385 fh_unlock(&resp->fh); 386 RETURN_STATUS(nfserr); 387 } 388 389 static __be32 390 nfsd3_proc_rename(struct svc_rqst *rqstp) 391 { 392 struct nfsd3_renameargs *argp = rqstp->rq_argp; 393 struct nfsd3_renameres *resp = rqstp->rq_resp; 394 __be32 nfserr; 395 396 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 397 SVCFH_fmt(&argp->ffh), 398 argp->flen, 399 argp->fname); 400 dprintk("nfsd: -> %s %.*s\n", 401 SVCFH_fmt(&argp->tfh), 402 argp->tlen, 403 argp->tname); 404 405 fh_copy(&resp->ffh, &argp->ffh); 406 fh_copy(&resp->tfh, &argp->tfh); 407 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 408 &resp->tfh, argp->tname, argp->tlen); 409 RETURN_STATUS(nfserr); 410 } 411 412 static __be32 413 nfsd3_proc_link(struct svc_rqst *rqstp) 414 { 415 struct nfsd3_linkargs *argp = rqstp->rq_argp; 416 struct nfsd3_linkres *resp = rqstp->rq_resp; 417 __be32 nfserr; 418 419 dprintk("nfsd: LINK(3) %s ->\n", 420 SVCFH_fmt(&argp->ffh)); 421 dprintk("nfsd: -> %s %.*s\n", 422 SVCFH_fmt(&argp->tfh), 423 argp->tlen, 424 argp->tname); 425 426 fh_copy(&resp->fh, &argp->ffh); 427 fh_copy(&resp->tfh, &argp->tfh); 428 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 429 &resp->fh); 430 RETURN_STATUS(nfserr); 431 } 432 433 /* 434 * Read a portion of a directory. 435 */ 436 static __be32 437 nfsd3_proc_readdir(struct svc_rqst *rqstp) 438 { 439 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 440 struct nfsd3_readdirres *resp = rqstp->rq_resp; 441 __be32 nfserr; 442 int count; 443 444 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 445 SVCFH_fmt(&argp->fh), 446 argp->count, (u32) argp->cookie); 447 448 /* Make sure we've room for the NULL ptr & eof flag, and shrink to 449 * client read size */ 450 count = (argp->count >> 2) - 2; 451 452 /* Read directory and encode entries on the fly */ 453 fh_copy(&resp->fh, &argp->fh); 454 455 resp->buflen = count; 456 resp->common.err = nfs_ok; 457 resp->buffer = argp->buffer; 458 resp->rqstp = rqstp; 459 nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 460 &resp->common, nfs3svc_encode_entry); 461 memcpy(resp->verf, argp->verf, 8); 462 resp->count = resp->buffer - argp->buffer; 463 if (resp->offset) 464 xdr_encode_hyper(resp->offset, argp->cookie); 465 466 RETURN_STATUS(nfserr); 467 } 468 469 /* 470 * Read a portion of a directory, including file handles and attrs. 471 * For now, we choose to ignore the dircount parameter. 472 */ 473 static __be32 474 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 475 { 476 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 477 struct nfsd3_readdirres *resp = rqstp->rq_resp; 478 __be32 nfserr; 479 int count = 0; 480 loff_t offset; 481 struct page **p; 482 caddr_t page_addr = NULL; 483 484 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 485 SVCFH_fmt(&argp->fh), 486 argp->count, (u32) argp->cookie); 487 488 /* Convert byte count to number of words (i.e. >> 2), 489 * and reserve room for the NULL ptr & eof flag (-2 words) */ 490 resp->count = (argp->count >> 2) - 2; 491 492 /* Read directory and encode entries on the fly */ 493 fh_copy(&resp->fh, &argp->fh); 494 495 resp->common.err = nfs_ok; 496 resp->buffer = argp->buffer; 497 resp->buflen = resp->count; 498 resp->rqstp = rqstp; 499 offset = argp->cookie; 500 501 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 502 if (nfserr) 503 RETURN_STATUS(nfserr); 504 505 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) 506 RETURN_STATUS(nfserr_notsupp); 507 508 nfserr = nfsd_readdir(rqstp, &resp->fh, 509 &offset, 510 &resp->common, 511 nfs3svc_encode_entry_plus); 512 memcpy(resp->verf, argp->verf, 8); 513 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { 514 page_addr = page_address(*p); 515 516 if (((caddr_t)resp->buffer >= page_addr) && 517 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { 518 count += (caddr_t)resp->buffer - page_addr; 519 break; 520 } 521 count += PAGE_SIZE; 522 } 523 resp->count = count >> 2; 524 if (resp->offset) { 525 if (unlikely(resp->offset1)) { 526 /* we ended up with offset on a page boundary */ 527 *resp->offset = htonl(offset >> 32); 528 *resp->offset1 = htonl(offset & 0xffffffff); 529 resp->offset1 = NULL; 530 } else { 531 xdr_encode_hyper(resp->offset, offset); 532 } 533 } 534 535 RETURN_STATUS(nfserr); 536 } 537 538 /* 539 * Get file system stats 540 */ 541 static __be32 542 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 543 { 544 struct nfsd_fhandle *argp = rqstp->rq_argp; 545 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 546 __be32 nfserr; 547 548 dprintk("nfsd: FSSTAT(3) %s\n", 549 SVCFH_fmt(&argp->fh)); 550 551 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 552 fh_put(&argp->fh); 553 RETURN_STATUS(nfserr); 554 } 555 556 /* 557 * Get file system info 558 */ 559 static __be32 560 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 561 { 562 struct nfsd_fhandle *argp = rqstp->rq_argp; 563 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 564 __be32 nfserr; 565 u32 max_blocksize = svc_max_payload(rqstp); 566 567 dprintk("nfsd: FSINFO(3) %s\n", 568 SVCFH_fmt(&argp->fh)); 569 570 resp->f_rtmax = max_blocksize; 571 resp->f_rtpref = max_blocksize; 572 resp->f_rtmult = PAGE_SIZE; 573 resp->f_wtmax = max_blocksize; 574 resp->f_wtpref = max_blocksize; 575 resp->f_wtmult = PAGE_SIZE; 576 resp->f_dtpref = PAGE_SIZE; 577 resp->f_maxfilesize = ~(u32) 0; 578 resp->f_properties = NFS3_FSF_DEFAULT; 579 580 nfserr = fh_verify(rqstp, &argp->fh, 0, 581 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 582 583 /* Check special features of the file system. May request 584 * different read/write sizes for file systems known to have 585 * problems with large blocks */ 586 if (nfserr == 0) { 587 struct super_block *sb = argp->fh.fh_dentry->d_sb; 588 589 /* Note that we don't care for remote fs's here */ 590 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 591 resp->f_properties = NFS3_FSF_BILLYBOY; 592 } 593 resp->f_maxfilesize = sb->s_maxbytes; 594 } 595 596 fh_put(&argp->fh); 597 RETURN_STATUS(nfserr); 598 } 599 600 /* 601 * Get pathconf info for the specified file 602 */ 603 static __be32 604 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 605 { 606 struct nfsd_fhandle *argp = rqstp->rq_argp; 607 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 608 __be32 nfserr; 609 610 dprintk("nfsd: PATHCONF(3) %s\n", 611 SVCFH_fmt(&argp->fh)); 612 613 /* Set default pathconf */ 614 resp->p_link_max = 255; /* at least */ 615 resp->p_name_max = 255; /* at least */ 616 resp->p_no_trunc = 0; 617 resp->p_chown_restricted = 1; 618 resp->p_case_insensitive = 0; 619 resp->p_case_preserving = 1; 620 621 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 622 623 if (nfserr == 0) { 624 struct super_block *sb = argp->fh.fh_dentry->d_sb; 625 626 /* Note that we don't care for remote fs's here */ 627 switch (sb->s_magic) { 628 case EXT2_SUPER_MAGIC: 629 resp->p_link_max = EXT2_LINK_MAX; 630 resp->p_name_max = EXT2_NAME_LEN; 631 break; 632 case MSDOS_SUPER_MAGIC: 633 resp->p_case_insensitive = 1; 634 resp->p_case_preserving = 0; 635 break; 636 } 637 } 638 639 fh_put(&argp->fh); 640 RETURN_STATUS(nfserr); 641 } 642 643 644 /* 645 * Commit a file (range) to stable storage. 646 */ 647 static __be32 648 nfsd3_proc_commit(struct svc_rqst *rqstp) 649 { 650 struct nfsd3_commitargs *argp = rqstp->rq_argp; 651 struct nfsd3_commitres *resp = rqstp->rq_resp; 652 __be32 nfserr; 653 654 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 655 SVCFH_fmt(&argp->fh), 656 argp->count, 657 (unsigned long long) argp->offset); 658 659 if (argp->offset > NFS_OFFSET_MAX) 660 RETURN_STATUS(nfserr_inval); 661 662 fh_copy(&resp->fh, &argp->fh); 663 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count); 664 665 RETURN_STATUS(nfserr); 666 } 667 668 669 /* 670 * NFSv3 Server procedures. 671 * Only the results of non-idempotent operations are cached. 672 */ 673 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle 674 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 675 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 676 #define nfsd3_mkdirargs nfsd3_createargs 677 #define nfsd3_readdirplusargs nfsd3_readdirargs 678 #define nfsd3_fhandleargs nfsd_fhandle 679 #define nfsd3_fhandleres nfsd3_attrstat 680 #define nfsd3_attrstatres nfsd3_attrstat 681 #define nfsd3_wccstatres nfsd3_attrstat 682 #define nfsd3_createres nfsd3_diropres 683 #define nfsd3_voidres nfsd3_voidargs 684 struct nfsd3_voidargs { int dummy; }; 685 686 #define ST 1 /* status*/ 687 #define FH 17 /* filehandle with length */ 688 #define AT 21 /* attributes */ 689 #define pAT (1+AT) /* post attributes - conditional */ 690 #define WC (7+pAT) /* WCC attributes */ 691 692 static const struct svc_procedure nfsd_procedures3[22] = { 693 [NFS3PROC_NULL] = { 694 .pc_func = nfsd3_proc_null, 695 .pc_encode = nfs3svc_encode_voidres, 696 .pc_argsize = sizeof(struct nfsd3_voidargs), 697 .pc_ressize = sizeof(struct nfsd3_voidres), 698 .pc_cachetype = RC_NOCACHE, 699 .pc_xdrressize = ST, 700 }, 701 [NFS3PROC_GETATTR] = { 702 .pc_func = nfsd3_proc_getattr, 703 .pc_decode = nfs3svc_decode_fhandleargs, 704 .pc_encode = nfs3svc_encode_attrstatres, 705 .pc_release = nfs3svc_release_fhandle, 706 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 707 .pc_ressize = sizeof(struct nfsd3_attrstatres), 708 .pc_cachetype = RC_NOCACHE, 709 .pc_xdrressize = ST+AT, 710 }, 711 [NFS3PROC_SETATTR] = { 712 .pc_func = nfsd3_proc_setattr, 713 .pc_decode = nfs3svc_decode_sattrargs, 714 .pc_encode = nfs3svc_encode_wccstatres, 715 .pc_release = nfs3svc_release_fhandle, 716 .pc_argsize = sizeof(struct nfsd3_sattrargs), 717 .pc_ressize = sizeof(struct nfsd3_wccstatres), 718 .pc_cachetype = RC_REPLBUFF, 719 .pc_xdrressize = ST+WC, 720 }, 721 [NFS3PROC_LOOKUP] = { 722 .pc_func = nfsd3_proc_lookup, 723 .pc_decode = nfs3svc_decode_diropargs, 724 .pc_encode = nfs3svc_encode_diropres, 725 .pc_release = nfs3svc_release_fhandle2, 726 .pc_argsize = sizeof(struct nfsd3_diropargs), 727 .pc_ressize = sizeof(struct nfsd3_diropres), 728 .pc_cachetype = RC_NOCACHE, 729 .pc_xdrressize = ST+FH+pAT+pAT, 730 }, 731 [NFS3PROC_ACCESS] = { 732 .pc_func = nfsd3_proc_access, 733 .pc_decode = nfs3svc_decode_accessargs, 734 .pc_encode = nfs3svc_encode_accessres, 735 .pc_release = nfs3svc_release_fhandle, 736 .pc_argsize = sizeof(struct nfsd3_accessargs), 737 .pc_ressize = sizeof(struct nfsd3_accessres), 738 .pc_cachetype = RC_NOCACHE, 739 .pc_xdrressize = ST+pAT+1, 740 }, 741 [NFS3PROC_READLINK] = { 742 .pc_func = nfsd3_proc_readlink, 743 .pc_decode = nfs3svc_decode_readlinkargs, 744 .pc_encode = nfs3svc_encode_readlinkres, 745 .pc_release = nfs3svc_release_fhandle, 746 .pc_argsize = sizeof(struct nfsd3_readlinkargs), 747 .pc_ressize = sizeof(struct nfsd3_readlinkres), 748 .pc_cachetype = RC_NOCACHE, 749 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 750 }, 751 [NFS3PROC_READ] = { 752 .pc_func = nfsd3_proc_read, 753 .pc_decode = nfs3svc_decode_readargs, 754 .pc_encode = nfs3svc_encode_readres, 755 .pc_release = nfs3svc_release_fhandle, 756 .pc_argsize = sizeof(struct nfsd3_readargs), 757 .pc_ressize = sizeof(struct nfsd3_readres), 758 .pc_cachetype = RC_NOCACHE, 759 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 760 }, 761 [NFS3PROC_WRITE] = { 762 .pc_func = nfsd3_proc_write, 763 .pc_decode = nfs3svc_decode_writeargs, 764 .pc_encode = nfs3svc_encode_writeres, 765 .pc_release = nfs3svc_release_fhandle, 766 .pc_argsize = sizeof(struct nfsd3_writeargs), 767 .pc_ressize = sizeof(struct nfsd3_writeres), 768 .pc_cachetype = RC_REPLBUFF, 769 .pc_xdrressize = ST+WC+4, 770 }, 771 [NFS3PROC_CREATE] = { 772 .pc_func = nfsd3_proc_create, 773 .pc_decode = nfs3svc_decode_createargs, 774 .pc_encode = nfs3svc_encode_createres, 775 .pc_release = nfs3svc_release_fhandle2, 776 .pc_argsize = sizeof(struct nfsd3_createargs), 777 .pc_ressize = sizeof(struct nfsd3_createres), 778 .pc_cachetype = RC_REPLBUFF, 779 .pc_xdrressize = ST+(1+FH+pAT)+WC, 780 }, 781 [NFS3PROC_MKDIR] = { 782 .pc_func = nfsd3_proc_mkdir, 783 .pc_decode = nfs3svc_decode_mkdirargs, 784 .pc_encode = nfs3svc_encode_createres, 785 .pc_release = nfs3svc_release_fhandle2, 786 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 787 .pc_ressize = sizeof(struct nfsd3_createres), 788 .pc_cachetype = RC_REPLBUFF, 789 .pc_xdrressize = ST+(1+FH+pAT)+WC, 790 }, 791 [NFS3PROC_SYMLINK] = { 792 .pc_func = nfsd3_proc_symlink, 793 .pc_decode = nfs3svc_decode_symlinkargs, 794 .pc_encode = nfs3svc_encode_createres, 795 .pc_release = nfs3svc_release_fhandle2, 796 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 797 .pc_ressize = sizeof(struct nfsd3_createres), 798 .pc_cachetype = RC_REPLBUFF, 799 .pc_xdrressize = ST+(1+FH+pAT)+WC, 800 }, 801 [NFS3PROC_MKNOD] = { 802 .pc_func = nfsd3_proc_mknod, 803 .pc_decode = nfs3svc_decode_mknodargs, 804 .pc_encode = nfs3svc_encode_createres, 805 .pc_release = nfs3svc_release_fhandle2, 806 .pc_argsize = sizeof(struct nfsd3_mknodargs), 807 .pc_ressize = sizeof(struct nfsd3_createres), 808 .pc_cachetype = RC_REPLBUFF, 809 .pc_xdrressize = ST+(1+FH+pAT)+WC, 810 }, 811 [NFS3PROC_REMOVE] = { 812 .pc_func = nfsd3_proc_remove, 813 .pc_decode = nfs3svc_decode_diropargs, 814 .pc_encode = nfs3svc_encode_wccstatres, 815 .pc_release = nfs3svc_release_fhandle, 816 .pc_argsize = sizeof(struct nfsd3_diropargs), 817 .pc_ressize = sizeof(struct nfsd3_wccstatres), 818 .pc_cachetype = RC_REPLBUFF, 819 .pc_xdrressize = ST+WC, 820 }, 821 [NFS3PROC_RMDIR] = { 822 .pc_func = nfsd3_proc_rmdir, 823 .pc_decode = nfs3svc_decode_diropargs, 824 .pc_encode = nfs3svc_encode_wccstatres, 825 .pc_release = nfs3svc_release_fhandle, 826 .pc_argsize = sizeof(struct nfsd3_diropargs), 827 .pc_ressize = sizeof(struct nfsd3_wccstatres), 828 .pc_cachetype = RC_REPLBUFF, 829 .pc_xdrressize = ST+WC, 830 }, 831 [NFS3PROC_RENAME] = { 832 .pc_func = nfsd3_proc_rename, 833 .pc_decode = nfs3svc_decode_renameargs, 834 .pc_encode = nfs3svc_encode_renameres, 835 .pc_release = nfs3svc_release_fhandle2, 836 .pc_argsize = sizeof(struct nfsd3_renameargs), 837 .pc_ressize = sizeof(struct nfsd3_renameres), 838 .pc_cachetype = RC_REPLBUFF, 839 .pc_xdrressize = ST+WC+WC, 840 }, 841 [NFS3PROC_LINK] = { 842 .pc_func = nfsd3_proc_link, 843 .pc_decode = nfs3svc_decode_linkargs, 844 .pc_encode = nfs3svc_encode_linkres, 845 .pc_release = nfs3svc_release_fhandle2, 846 .pc_argsize = sizeof(struct nfsd3_linkargs), 847 .pc_ressize = sizeof(struct nfsd3_linkres), 848 .pc_cachetype = RC_REPLBUFF, 849 .pc_xdrressize = ST+pAT+WC, 850 }, 851 [NFS3PROC_READDIR] = { 852 .pc_func = nfsd3_proc_readdir, 853 .pc_decode = nfs3svc_decode_readdirargs, 854 .pc_encode = nfs3svc_encode_readdirres, 855 .pc_release = nfs3svc_release_fhandle, 856 .pc_argsize = sizeof(struct nfsd3_readdirargs), 857 .pc_ressize = sizeof(struct nfsd3_readdirres), 858 .pc_cachetype = RC_NOCACHE, 859 }, 860 [NFS3PROC_READDIRPLUS] = { 861 .pc_func = nfsd3_proc_readdirplus, 862 .pc_decode = nfs3svc_decode_readdirplusargs, 863 .pc_encode = nfs3svc_encode_readdirres, 864 .pc_release = nfs3svc_release_fhandle, 865 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 866 .pc_ressize = sizeof(struct nfsd3_readdirres), 867 .pc_cachetype = RC_NOCACHE, 868 }, 869 [NFS3PROC_FSSTAT] = { 870 .pc_func = nfsd3_proc_fsstat, 871 .pc_decode = nfs3svc_decode_fhandleargs, 872 .pc_encode = nfs3svc_encode_fsstatres, 873 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 874 .pc_ressize = sizeof(struct nfsd3_fsstatres), 875 .pc_cachetype = RC_NOCACHE, 876 .pc_xdrressize = ST+pAT+2*6+1, 877 }, 878 [NFS3PROC_FSINFO] = { 879 .pc_func = nfsd3_proc_fsinfo, 880 .pc_decode = nfs3svc_decode_fhandleargs, 881 .pc_encode = nfs3svc_encode_fsinfores, 882 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 883 .pc_ressize = sizeof(struct nfsd3_fsinfores), 884 .pc_cachetype = RC_NOCACHE, 885 .pc_xdrressize = ST+pAT+12, 886 }, 887 [NFS3PROC_PATHCONF] = { 888 .pc_func = nfsd3_proc_pathconf, 889 .pc_decode = nfs3svc_decode_fhandleargs, 890 .pc_encode = nfs3svc_encode_pathconfres, 891 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 892 .pc_ressize = sizeof(struct nfsd3_pathconfres), 893 .pc_cachetype = RC_NOCACHE, 894 .pc_xdrressize = ST+pAT+6, 895 }, 896 [NFS3PROC_COMMIT] = { 897 .pc_func = nfsd3_proc_commit, 898 .pc_decode = nfs3svc_decode_commitargs, 899 .pc_encode = nfs3svc_encode_commitres, 900 .pc_release = nfs3svc_release_fhandle, 901 .pc_argsize = sizeof(struct nfsd3_commitargs), 902 .pc_ressize = sizeof(struct nfsd3_commitres), 903 .pc_cachetype = RC_NOCACHE, 904 .pc_xdrressize = ST+WC+2, 905 }, 906 }; 907 908 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]; 909 const struct svc_version nfsd_version3 = { 910 .vs_vers = 3, 911 .vs_nproc = 22, 912 .vs_proc = nfsd_procedures3, 913 .vs_dispatch = nfsd_dispatch, 914 .vs_count = nfsd_count3, 915 .vs_xdrsize = NFS3_SVC_XDRSIZE, 916 }; 917