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 &resp->eof); 177 RETURN_STATUS(nfserr); 178 } 179 180 /* 181 * Write data to a file 182 */ 183 static __be32 184 nfsd3_proc_write(struct svc_rqst *rqstp) 185 { 186 struct nfsd3_writeargs *argp = rqstp->rq_argp; 187 struct nfsd3_writeres *resp = rqstp->rq_resp; 188 __be32 nfserr; 189 unsigned long cnt = argp->len; 190 unsigned int nvecs; 191 192 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 193 SVCFH_fmt(&argp->fh), 194 argp->len, 195 (unsigned long long) argp->offset, 196 argp->stable? " stable" : ""); 197 198 fh_copy(&resp->fh, &argp->fh); 199 resp->committed = argp->stable; 200 nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages, 201 &argp->first, cnt); 202 if (!nvecs) 203 RETURN_STATUS(nfserr_io); 204 nfserr = nfsd_write(rqstp, &resp->fh, argp->offset, 205 rqstp->rq_vec, nvecs, &cnt, 206 resp->committed, resp->verf); 207 resp->count = cnt; 208 RETURN_STATUS(nfserr); 209 } 210 211 /* 212 * With NFSv3, CREATE processing is a lot easier than with NFSv2. 213 * At least in theory; we'll see how it fares in practice when the 214 * first reports about SunOS compatibility problems start to pour in... 215 */ 216 static __be32 217 nfsd3_proc_create(struct svc_rqst *rqstp) 218 { 219 struct nfsd3_createargs *argp = rqstp->rq_argp; 220 struct nfsd3_diropres *resp = rqstp->rq_resp; 221 svc_fh *dirfhp, *newfhp = NULL; 222 struct iattr *attr; 223 __be32 nfserr; 224 225 dprintk("nfsd: CREATE(3) %s %.*s\n", 226 SVCFH_fmt(&argp->fh), 227 argp->len, 228 argp->name); 229 230 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 231 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 232 attr = &argp->attrs; 233 234 /* Unfudge the mode bits */ 235 attr->ia_mode &= ~S_IFMT; 236 if (!(attr->ia_valid & ATTR_MODE)) { 237 attr->ia_valid |= ATTR_MODE; 238 attr->ia_mode = S_IFREG; 239 } else { 240 attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG; 241 } 242 243 /* Now create the file and set attributes */ 244 nfserr = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len, 245 attr, newfhp, 246 argp->createmode, (u32 *)argp->verf, NULL, NULL); 247 248 RETURN_STATUS(nfserr); 249 } 250 251 /* 252 * Make directory. This operation is not idempotent. 253 */ 254 static __be32 255 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 256 { 257 struct nfsd3_createargs *argp = rqstp->rq_argp; 258 struct nfsd3_diropres *resp = rqstp->rq_resp; 259 __be32 nfserr; 260 261 dprintk("nfsd: MKDIR(3) %s %.*s\n", 262 SVCFH_fmt(&argp->fh), 263 argp->len, 264 argp->name); 265 266 argp->attrs.ia_valid &= ~ATTR_SIZE; 267 fh_copy(&resp->dirfh, &argp->fh); 268 fh_init(&resp->fh, NFS3_FHSIZE); 269 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 270 &argp->attrs, S_IFDIR, 0, &resp->fh); 271 fh_unlock(&resp->dirfh); 272 RETURN_STATUS(nfserr); 273 } 274 275 static __be32 276 nfsd3_proc_symlink(struct svc_rqst *rqstp) 277 { 278 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 279 struct nfsd3_diropres *resp = rqstp->rq_resp; 280 __be32 nfserr; 281 282 if (argp->tlen == 0) 283 RETURN_STATUS(nfserr_inval); 284 if (argp->tlen > NFS3_MAXPATHLEN) 285 RETURN_STATUS(nfserr_nametoolong); 286 287 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 288 page_address(rqstp->rq_arg.pages[0]), 289 argp->tlen); 290 if (IS_ERR(argp->tname)) 291 RETURN_STATUS(nfserrno(PTR_ERR(argp->tname))); 292 293 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 294 SVCFH_fmt(&argp->ffh), 295 argp->flen, argp->fname, 296 argp->tlen, argp->tname); 297 298 fh_copy(&resp->dirfh, &argp->ffh); 299 fh_init(&resp->fh, NFS3_FHSIZE); 300 nfserr = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, argp->flen, 301 argp->tname, &resp->fh); 302 kfree(argp->tname); 303 RETURN_STATUS(nfserr); 304 } 305 306 /* 307 * Make socket/fifo/device. 308 */ 309 static __be32 310 nfsd3_proc_mknod(struct svc_rqst *rqstp) 311 { 312 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 313 struct nfsd3_diropres *resp = rqstp->rq_resp; 314 __be32 nfserr; 315 int type; 316 dev_t rdev = 0; 317 318 dprintk("nfsd: MKNOD(3) %s %.*s\n", 319 SVCFH_fmt(&argp->fh), 320 argp->len, 321 argp->name); 322 323 fh_copy(&resp->dirfh, &argp->fh); 324 fh_init(&resp->fh, NFS3_FHSIZE); 325 326 if (argp->ftype == 0 || argp->ftype >= NF3BAD) 327 RETURN_STATUS(nfserr_inval); 328 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 329 rdev = MKDEV(argp->major, argp->minor); 330 if (MAJOR(rdev) != argp->major || 331 MINOR(rdev) != argp->minor) 332 RETURN_STATUS(nfserr_inval); 333 } else 334 if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) 335 RETURN_STATUS(nfserr_inval); 336 337 type = nfs3_ftypes[argp->ftype]; 338 nfserr = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 339 &argp->attrs, type, rdev, &resp->fh); 340 fh_unlock(&resp->dirfh); 341 RETURN_STATUS(nfserr); 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 __be32 nfserr; 353 354 dprintk("nfsd: REMOVE(3) %s %.*s\n", 355 SVCFH_fmt(&argp->fh), 356 argp->len, 357 argp->name); 358 359 /* Unlink. -S_IFDIR means file must not be a directory */ 360 fh_copy(&resp->fh, &argp->fh); 361 nfserr = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, argp->name, argp->len); 362 fh_unlock(&resp->fh); 363 RETURN_STATUS(nfserr); 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 __be32 nfserr; 375 376 dprintk("nfsd: RMDIR(3) %s %.*s\n", 377 SVCFH_fmt(&argp->fh), 378 argp->len, 379 argp->name); 380 381 fh_copy(&resp->fh, &argp->fh); 382 nfserr = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, argp->name, argp->len); 383 fh_unlock(&resp->fh); 384 RETURN_STATUS(nfserr); 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 __be32 nfserr; 393 394 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 395 SVCFH_fmt(&argp->ffh), 396 argp->flen, 397 argp->fname); 398 dprintk("nfsd: -> %s %.*s\n", 399 SVCFH_fmt(&argp->tfh), 400 argp->tlen, 401 argp->tname); 402 403 fh_copy(&resp->ffh, &argp->ffh); 404 fh_copy(&resp->tfh, &argp->tfh); 405 nfserr = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 406 &resp->tfh, argp->tname, argp->tlen); 407 RETURN_STATUS(nfserr); 408 } 409 410 static __be32 411 nfsd3_proc_link(struct svc_rqst *rqstp) 412 { 413 struct nfsd3_linkargs *argp = rqstp->rq_argp; 414 struct nfsd3_linkres *resp = rqstp->rq_resp; 415 __be32 nfserr; 416 417 dprintk("nfsd: LINK(3) %s ->\n", 418 SVCFH_fmt(&argp->ffh)); 419 dprintk("nfsd: -> %s %.*s\n", 420 SVCFH_fmt(&argp->tfh), 421 argp->tlen, 422 argp->tname); 423 424 fh_copy(&resp->fh, &argp->ffh); 425 fh_copy(&resp->tfh, &argp->tfh); 426 nfserr = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 427 &resp->fh); 428 RETURN_STATUS(nfserr); 429 } 430 431 /* 432 * Read a portion of a directory. 433 */ 434 static __be32 435 nfsd3_proc_readdir(struct svc_rqst *rqstp) 436 { 437 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 438 struct nfsd3_readdirres *resp = rqstp->rq_resp; 439 __be32 nfserr; 440 int count = 0; 441 struct page **p; 442 caddr_t page_addr = NULL; 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 count = 0; 463 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { 464 page_addr = page_address(*p); 465 466 if (((caddr_t)resp->buffer >= page_addr) && 467 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { 468 count += (caddr_t)resp->buffer - page_addr; 469 break; 470 } 471 count += PAGE_SIZE; 472 } 473 resp->count = count >> 2; 474 if (resp->offset) { 475 loff_t offset = argp->cookie; 476 477 if (unlikely(resp->offset1)) { 478 /* we ended up with offset on a page boundary */ 479 *resp->offset = htonl(offset >> 32); 480 *resp->offset1 = htonl(offset & 0xffffffff); 481 resp->offset1 = NULL; 482 } else { 483 xdr_encode_hyper(resp->offset, offset); 484 } 485 resp->offset = NULL; 486 } 487 488 RETURN_STATUS(nfserr); 489 } 490 491 /* 492 * Read a portion of a directory, including file handles and attrs. 493 * For now, we choose to ignore the dircount parameter. 494 */ 495 static __be32 496 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 497 { 498 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 499 struct nfsd3_readdirres *resp = rqstp->rq_resp; 500 __be32 nfserr; 501 int count = 0; 502 loff_t offset; 503 struct page **p; 504 caddr_t page_addr = NULL; 505 506 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 507 SVCFH_fmt(&argp->fh), 508 argp->count, (u32) argp->cookie); 509 510 /* Convert byte count to number of words (i.e. >> 2), 511 * and reserve room for the NULL ptr & eof flag (-2 words) */ 512 resp->count = (argp->count >> 2) - 2; 513 514 /* Read directory and encode entries on the fly */ 515 fh_copy(&resp->fh, &argp->fh); 516 517 resp->common.err = nfs_ok; 518 resp->buffer = argp->buffer; 519 resp->buflen = resp->count; 520 resp->rqstp = rqstp; 521 offset = argp->cookie; 522 523 nfserr = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 524 if (nfserr) 525 RETURN_STATUS(nfserr); 526 527 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) 528 RETURN_STATUS(nfserr_notsupp); 529 530 nfserr = nfsd_readdir(rqstp, &resp->fh, 531 &offset, 532 &resp->common, 533 nfs3svc_encode_entry_plus); 534 memcpy(resp->verf, argp->verf, 8); 535 for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) { 536 page_addr = page_address(*p); 537 538 if (((caddr_t)resp->buffer >= page_addr) && 539 ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) { 540 count += (caddr_t)resp->buffer - page_addr; 541 break; 542 } 543 count += PAGE_SIZE; 544 } 545 resp->count = count >> 2; 546 if (resp->offset) { 547 if (unlikely(resp->offset1)) { 548 /* we ended up with offset on a page boundary */ 549 *resp->offset = htonl(offset >> 32); 550 *resp->offset1 = htonl(offset & 0xffffffff); 551 resp->offset1 = NULL; 552 } else { 553 xdr_encode_hyper(resp->offset, offset); 554 } 555 resp->offset = NULL; 556 } 557 558 RETURN_STATUS(nfserr); 559 } 560 561 /* 562 * Get file system stats 563 */ 564 static __be32 565 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 566 { 567 struct nfsd_fhandle *argp = rqstp->rq_argp; 568 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 569 __be32 nfserr; 570 571 dprintk("nfsd: FSSTAT(3) %s\n", 572 SVCFH_fmt(&argp->fh)); 573 574 nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 575 fh_put(&argp->fh); 576 RETURN_STATUS(nfserr); 577 } 578 579 /* 580 * Get file system info 581 */ 582 static __be32 583 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 584 { 585 struct nfsd_fhandle *argp = rqstp->rq_argp; 586 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 587 __be32 nfserr; 588 u32 max_blocksize = svc_max_payload(rqstp); 589 590 dprintk("nfsd: FSINFO(3) %s\n", 591 SVCFH_fmt(&argp->fh)); 592 593 resp->f_rtmax = max_blocksize; 594 resp->f_rtpref = max_blocksize; 595 resp->f_rtmult = PAGE_SIZE; 596 resp->f_wtmax = max_blocksize; 597 resp->f_wtpref = max_blocksize; 598 resp->f_wtmult = PAGE_SIZE; 599 resp->f_dtpref = max_blocksize; 600 resp->f_maxfilesize = ~(u32) 0; 601 resp->f_properties = NFS3_FSF_DEFAULT; 602 603 nfserr = fh_verify(rqstp, &argp->fh, 0, 604 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 605 606 /* Check special features of the file system. May request 607 * different read/write sizes for file systems known to have 608 * problems with large blocks */ 609 if (nfserr == 0) { 610 struct super_block *sb = argp->fh.fh_dentry->d_sb; 611 612 /* Note that we don't care for remote fs's here */ 613 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 614 resp->f_properties = NFS3_FSF_BILLYBOY; 615 } 616 resp->f_maxfilesize = sb->s_maxbytes; 617 } 618 619 fh_put(&argp->fh); 620 RETURN_STATUS(nfserr); 621 } 622 623 /* 624 * Get pathconf info for the specified file 625 */ 626 static __be32 627 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 628 { 629 struct nfsd_fhandle *argp = rqstp->rq_argp; 630 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 631 __be32 nfserr; 632 633 dprintk("nfsd: PATHCONF(3) %s\n", 634 SVCFH_fmt(&argp->fh)); 635 636 /* Set default pathconf */ 637 resp->p_link_max = 255; /* at least */ 638 resp->p_name_max = 255; /* at least */ 639 resp->p_no_trunc = 0; 640 resp->p_chown_restricted = 1; 641 resp->p_case_insensitive = 0; 642 resp->p_case_preserving = 1; 643 644 nfserr = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 645 646 if (nfserr == 0) { 647 struct super_block *sb = argp->fh.fh_dentry->d_sb; 648 649 /* Note that we don't care for remote fs's here */ 650 switch (sb->s_magic) { 651 case EXT2_SUPER_MAGIC: 652 resp->p_link_max = EXT2_LINK_MAX; 653 resp->p_name_max = EXT2_NAME_LEN; 654 break; 655 case MSDOS_SUPER_MAGIC: 656 resp->p_case_insensitive = 1; 657 resp->p_case_preserving = 0; 658 break; 659 } 660 } 661 662 fh_put(&argp->fh); 663 RETURN_STATUS(nfserr); 664 } 665 666 667 /* 668 * Commit a file (range) to stable storage. 669 */ 670 static __be32 671 nfsd3_proc_commit(struct svc_rqst *rqstp) 672 { 673 struct nfsd3_commitargs *argp = rqstp->rq_argp; 674 struct nfsd3_commitres *resp = rqstp->rq_resp; 675 __be32 nfserr; 676 677 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 678 SVCFH_fmt(&argp->fh), 679 argp->count, 680 (unsigned long long) argp->offset); 681 682 if (argp->offset > NFS_OFFSET_MAX) 683 RETURN_STATUS(nfserr_inval); 684 685 fh_copy(&resp->fh, &argp->fh); 686 nfserr = nfsd_commit(rqstp, &resp->fh, argp->offset, argp->count, 687 resp->verf); 688 689 RETURN_STATUS(nfserr); 690 } 691 692 693 /* 694 * NFSv3 Server procedures. 695 * Only the results of non-idempotent operations are cached. 696 */ 697 #define nfs3svc_decode_fhandleargs nfs3svc_decode_fhandle 698 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 699 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 700 #define nfsd3_mkdirargs nfsd3_createargs 701 #define nfsd3_readdirplusargs nfsd3_readdirargs 702 #define nfsd3_fhandleargs nfsd_fhandle 703 #define nfsd3_fhandleres nfsd3_attrstat 704 #define nfsd3_attrstatres nfsd3_attrstat 705 #define nfsd3_wccstatres nfsd3_attrstat 706 #define nfsd3_createres nfsd3_diropres 707 #define nfsd3_voidres nfsd3_voidargs 708 struct nfsd3_voidargs { int dummy; }; 709 710 #define ST 1 /* status*/ 711 #define FH 17 /* filehandle with length */ 712 #define AT 21 /* attributes */ 713 #define pAT (1+AT) /* post attributes - conditional */ 714 #define WC (7+pAT) /* WCC attributes */ 715 716 static const struct svc_procedure nfsd_procedures3[22] = { 717 [NFS3PROC_NULL] = { 718 .pc_func = nfsd3_proc_null, 719 .pc_encode = nfs3svc_encode_voidres, 720 .pc_argsize = sizeof(struct nfsd3_voidargs), 721 .pc_ressize = sizeof(struct nfsd3_voidres), 722 .pc_cachetype = RC_NOCACHE, 723 .pc_xdrressize = ST, 724 }, 725 [NFS3PROC_GETATTR] = { 726 .pc_func = nfsd3_proc_getattr, 727 .pc_decode = nfs3svc_decode_fhandleargs, 728 .pc_encode = nfs3svc_encode_attrstatres, 729 .pc_release = nfs3svc_release_fhandle, 730 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 731 .pc_ressize = sizeof(struct nfsd3_attrstatres), 732 .pc_cachetype = RC_NOCACHE, 733 .pc_xdrressize = ST+AT, 734 }, 735 [NFS3PROC_SETATTR] = { 736 .pc_func = nfsd3_proc_setattr, 737 .pc_decode = nfs3svc_decode_sattrargs, 738 .pc_encode = nfs3svc_encode_wccstatres, 739 .pc_release = nfs3svc_release_fhandle, 740 .pc_argsize = sizeof(struct nfsd3_sattrargs), 741 .pc_ressize = sizeof(struct nfsd3_wccstatres), 742 .pc_cachetype = RC_REPLBUFF, 743 .pc_xdrressize = ST+WC, 744 }, 745 [NFS3PROC_LOOKUP] = { 746 .pc_func = nfsd3_proc_lookup, 747 .pc_decode = nfs3svc_decode_diropargs, 748 .pc_encode = nfs3svc_encode_diropres, 749 .pc_release = nfs3svc_release_fhandle2, 750 .pc_argsize = sizeof(struct nfsd3_diropargs), 751 .pc_ressize = sizeof(struct nfsd3_diropres), 752 .pc_cachetype = RC_NOCACHE, 753 .pc_xdrressize = ST+FH+pAT+pAT, 754 }, 755 [NFS3PROC_ACCESS] = { 756 .pc_func = nfsd3_proc_access, 757 .pc_decode = nfs3svc_decode_accessargs, 758 .pc_encode = nfs3svc_encode_accessres, 759 .pc_release = nfs3svc_release_fhandle, 760 .pc_argsize = sizeof(struct nfsd3_accessargs), 761 .pc_ressize = sizeof(struct nfsd3_accessres), 762 .pc_cachetype = RC_NOCACHE, 763 .pc_xdrressize = ST+pAT+1, 764 }, 765 [NFS3PROC_READLINK] = { 766 .pc_func = nfsd3_proc_readlink, 767 .pc_decode = nfs3svc_decode_readlinkargs, 768 .pc_encode = nfs3svc_encode_readlinkres, 769 .pc_release = nfs3svc_release_fhandle, 770 .pc_argsize = sizeof(struct nfsd3_readlinkargs), 771 .pc_ressize = sizeof(struct nfsd3_readlinkres), 772 .pc_cachetype = RC_NOCACHE, 773 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 774 }, 775 [NFS3PROC_READ] = { 776 .pc_func = nfsd3_proc_read, 777 .pc_decode = nfs3svc_decode_readargs, 778 .pc_encode = nfs3svc_encode_readres, 779 .pc_release = nfs3svc_release_fhandle, 780 .pc_argsize = sizeof(struct nfsd3_readargs), 781 .pc_ressize = sizeof(struct nfsd3_readres), 782 .pc_cachetype = RC_NOCACHE, 783 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 784 }, 785 [NFS3PROC_WRITE] = { 786 .pc_func = nfsd3_proc_write, 787 .pc_decode = nfs3svc_decode_writeargs, 788 .pc_encode = nfs3svc_encode_writeres, 789 .pc_release = nfs3svc_release_fhandle, 790 .pc_argsize = sizeof(struct nfsd3_writeargs), 791 .pc_ressize = sizeof(struct nfsd3_writeres), 792 .pc_cachetype = RC_REPLBUFF, 793 .pc_xdrressize = ST+WC+4, 794 }, 795 [NFS3PROC_CREATE] = { 796 .pc_func = nfsd3_proc_create, 797 .pc_decode = nfs3svc_decode_createargs, 798 .pc_encode = nfs3svc_encode_createres, 799 .pc_release = nfs3svc_release_fhandle2, 800 .pc_argsize = sizeof(struct nfsd3_createargs), 801 .pc_ressize = sizeof(struct nfsd3_createres), 802 .pc_cachetype = RC_REPLBUFF, 803 .pc_xdrressize = ST+(1+FH+pAT)+WC, 804 }, 805 [NFS3PROC_MKDIR] = { 806 .pc_func = nfsd3_proc_mkdir, 807 .pc_decode = nfs3svc_decode_mkdirargs, 808 .pc_encode = nfs3svc_encode_createres, 809 .pc_release = nfs3svc_release_fhandle2, 810 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 811 .pc_ressize = sizeof(struct nfsd3_createres), 812 .pc_cachetype = RC_REPLBUFF, 813 .pc_xdrressize = ST+(1+FH+pAT)+WC, 814 }, 815 [NFS3PROC_SYMLINK] = { 816 .pc_func = nfsd3_proc_symlink, 817 .pc_decode = nfs3svc_decode_symlinkargs, 818 .pc_encode = nfs3svc_encode_createres, 819 .pc_release = nfs3svc_release_fhandle2, 820 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 821 .pc_ressize = sizeof(struct nfsd3_createres), 822 .pc_cachetype = RC_REPLBUFF, 823 .pc_xdrressize = ST+(1+FH+pAT)+WC, 824 }, 825 [NFS3PROC_MKNOD] = { 826 .pc_func = nfsd3_proc_mknod, 827 .pc_decode = nfs3svc_decode_mknodargs, 828 .pc_encode = nfs3svc_encode_createres, 829 .pc_release = nfs3svc_release_fhandle2, 830 .pc_argsize = sizeof(struct nfsd3_mknodargs), 831 .pc_ressize = sizeof(struct nfsd3_createres), 832 .pc_cachetype = RC_REPLBUFF, 833 .pc_xdrressize = ST+(1+FH+pAT)+WC, 834 }, 835 [NFS3PROC_REMOVE] = { 836 .pc_func = nfsd3_proc_remove, 837 .pc_decode = nfs3svc_decode_diropargs, 838 .pc_encode = nfs3svc_encode_wccstatres, 839 .pc_release = nfs3svc_release_fhandle, 840 .pc_argsize = sizeof(struct nfsd3_diropargs), 841 .pc_ressize = sizeof(struct nfsd3_wccstatres), 842 .pc_cachetype = RC_REPLBUFF, 843 .pc_xdrressize = ST+WC, 844 }, 845 [NFS3PROC_RMDIR] = { 846 .pc_func = nfsd3_proc_rmdir, 847 .pc_decode = nfs3svc_decode_diropargs, 848 .pc_encode = nfs3svc_encode_wccstatres, 849 .pc_release = nfs3svc_release_fhandle, 850 .pc_argsize = sizeof(struct nfsd3_diropargs), 851 .pc_ressize = sizeof(struct nfsd3_wccstatres), 852 .pc_cachetype = RC_REPLBUFF, 853 .pc_xdrressize = ST+WC, 854 }, 855 [NFS3PROC_RENAME] = { 856 .pc_func = nfsd3_proc_rename, 857 .pc_decode = nfs3svc_decode_renameargs, 858 .pc_encode = nfs3svc_encode_renameres, 859 .pc_release = nfs3svc_release_fhandle2, 860 .pc_argsize = sizeof(struct nfsd3_renameargs), 861 .pc_ressize = sizeof(struct nfsd3_renameres), 862 .pc_cachetype = RC_REPLBUFF, 863 .pc_xdrressize = ST+WC+WC, 864 }, 865 [NFS3PROC_LINK] = { 866 .pc_func = nfsd3_proc_link, 867 .pc_decode = nfs3svc_decode_linkargs, 868 .pc_encode = nfs3svc_encode_linkres, 869 .pc_release = nfs3svc_release_fhandle2, 870 .pc_argsize = sizeof(struct nfsd3_linkargs), 871 .pc_ressize = sizeof(struct nfsd3_linkres), 872 .pc_cachetype = RC_REPLBUFF, 873 .pc_xdrressize = ST+pAT+WC, 874 }, 875 [NFS3PROC_READDIR] = { 876 .pc_func = nfsd3_proc_readdir, 877 .pc_decode = nfs3svc_decode_readdirargs, 878 .pc_encode = nfs3svc_encode_readdirres, 879 .pc_release = nfs3svc_release_fhandle, 880 .pc_argsize = sizeof(struct nfsd3_readdirargs), 881 .pc_ressize = sizeof(struct nfsd3_readdirres), 882 .pc_cachetype = RC_NOCACHE, 883 }, 884 [NFS3PROC_READDIRPLUS] = { 885 .pc_func = nfsd3_proc_readdirplus, 886 .pc_decode = nfs3svc_decode_readdirplusargs, 887 .pc_encode = nfs3svc_encode_readdirres, 888 .pc_release = nfs3svc_release_fhandle, 889 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 890 .pc_ressize = sizeof(struct nfsd3_readdirres), 891 .pc_cachetype = RC_NOCACHE, 892 }, 893 [NFS3PROC_FSSTAT] = { 894 .pc_func = nfsd3_proc_fsstat, 895 .pc_decode = nfs3svc_decode_fhandleargs, 896 .pc_encode = nfs3svc_encode_fsstatres, 897 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 898 .pc_ressize = sizeof(struct nfsd3_fsstatres), 899 .pc_cachetype = RC_NOCACHE, 900 .pc_xdrressize = ST+pAT+2*6+1, 901 }, 902 [NFS3PROC_FSINFO] = { 903 .pc_func = nfsd3_proc_fsinfo, 904 .pc_decode = nfs3svc_decode_fhandleargs, 905 .pc_encode = nfs3svc_encode_fsinfores, 906 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 907 .pc_ressize = sizeof(struct nfsd3_fsinfores), 908 .pc_cachetype = RC_NOCACHE, 909 .pc_xdrressize = ST+pAT+12, 910 }, 911 [NFS3PROC_PATHCONF] = { 912 .pc_func = nfsd3_proc_pathconf, 913 .pc_decode = nfs3svc_decode_fhandleargs, 914 .pc_encode = nfs3svc_encode_pathconfres, 915 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 916 .pc_ressize = sizeof(struct nfsd3_pathconfres), 917 .pc_cachetype = RC_NOCACHE, 918 .pc_xdrressize = ST+pAT+6, 919 }, 920 [NFS3PROC_COMMIT] = { 921 .pc_func = nfsd3_proc_commit, 922 .pc_decode = nfs3svc_decode_commitargs, 923 .pc_encode = nfs3svc_encode_commitres, 924 .pc_release = nfs3svc_release_fhandle, 925 .pc_argsize = sizeof(struct nfsd3_commitargs), 926 .pc_ressize = sizeof(struct nfsd3_commitres), 927 .pc_cachetype = RC_NOCACHE, 928 .pc_xdrressize = ST+WC+2, 929 }, 930 }; 931 932 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]; 933 const struct svc_version nfsd_version3 = { 934 .vs_vers = 3, 935 .vs_nproc = 22, 936 .vs_proc = nfsd_procedures3, 937 .vs_dispatch = nfsd_dispatch, 938 .vs_count = nfsd_count3, 939 .vs_xdrsize = NFS3_SVC_XDRSIZE, 940 }; 941