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 #include <linux/namei.h> 12 13 #include "cache.h" 14 #include "xdr3.h" 15 #include "vfs.h" 16 #include "filecache.h" 17 18 #define NFSDDBG_FACILITY NFSDDBG_PROC 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 static __be32 nfsd3_map_status(__be32 status) 32 { 33 switch (status) { 34 case nfs_ok: 35 break; 36 case nfserr_nofilehandle: 37 status = nfserr_badhandle; 38 break; 39 case nfserr_wrongsec: 40 case nfserr_file_open: 41 status = nfserr_acces; 42 break; 43 case nfserr_symlink_not_dir: 44 status = nfserr_notdir; 45 break; 46 case nfserr_symlink: 47 case nfserr_wrong_type: 48 status = nfserr_inval; 49 break; 50 } 51 return status; 52 } 53 54 /* 55 * NULL call. 56 */ 57 static __be32 58 nfsd3_proc_null(struct svc_rqst *rqstp) 59 { 60 return rpc_success; 61 } 62 63 /* 64 * Get a file's attributes 65 */ 66 static __be32 67 nfsd3_proc_getattr(struct svc_rqst *rqstp) 68 { 69 struct nfsd_fhandle *argp = rqstp->rq_argp; 70 struct nfsd3_attrstat *resp = rqstp->rq_resp; 71 72 dprintk("nfsd: GETATTR(3) %s\n", 73 SVCFH_fmt(&argp->fh)); 74 75 fh_copy(&resp->fh, &argp->fh); 76 resp->status = fh_verify(rqstp, &resp->fh, 0, 77 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 78 if (resp->status != nfs_ok) 79 goto out; 80 81 resp->status = fh_getattr(&resp->fh, &resp->stat); 82 out: 83 resp->status = nfsd3_map_status(resp->status); 84 return rpc_success; 85 } 86 87 /* 88 * Set a file's attributes 89 */ 90 static __be32 91 nfsd3_proc_setattr(struct svc_rqst *rqstp) 92 { 93 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 94 struct nfsd3_attrstat *resp = rqstp->rq_resp; 95 struct nfsd_attrs attrs = { 96 .na_iattr = &argp->attrs, 97 }; 98 const struct timespec64 *guardtime = NULL; 99 100 dprintk("nfsd: SETATTR(3) %s\n", 101 SVCFH_fmt(&argp->fh)); 102 103 fh_copy(&resp->fh, &argp->fh); 104 if (argp->check_guard) 105 guardtime = &argp->guardtime; 106 resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs, guardtime); 107 resp->status = nfsd3_map_status(resp->status); 108 return rpc_success; 109 } 110 111 /* 112 * Look up a path name component 113 */ 114 static __be32 115 nfsd3_proc_lookup(struct svc_rqst *rqstp) 116 { 117 struct nfsd3_diropargs *argp = rqstp->rq_argp; 118 struct nfsd3_diropres *resp = rqstp->rq_resp; 119 120 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 121 SVCFH_fmt(&argp->fh), 122 argp->len, 123 argp->name); 124 125 fh_copy(&resp->dirfh, &argp->fh); 126 fh_init(&resp->fh, NFS3_FHSIZE); 127 128 resp->status = nfsd_lookup(rqstp, &resp->dirfh, 129 argp->name, argp->len, 130 &resp->fh); 131 resp->status = nfsd3_map_status(resp->status); 132 return rpc_success; 133 } 134 135 /* 136 * Check file access 137 */ 138 static __be32 139 nfsd3_proc_access(struct svc_rqst *rqstp) 140 { 141 struct nfsd3_accessargs *argp = rqstp->rq_argp; 142 struct nfsd3_accessres *resp = rqstp->rq_resp; 143 144 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 145 SVCFH_fmt(&argp->fh), 146 argp->access); 147 148 fh_copy(&resp->fh, &argp->fh); 149 resp->access = argp->access; 150 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 151 resp->status = nfsd3_map_status(resp->status); 152 return rpc_success; 153 } 154 155 /* 156 * Read a symlink. 157 */ 158 static __be32 159 nfsd3_proc_readlink(struct svc_rqst *rqstp) 160 { 161 struct nfsd_fhandle *argp = rqstp->rq_argp; 162 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 163 164 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 165 166 /* Read the symlink. */ 167 fh_copy(&resp->fh, &argp->fh); 168 resp->len = NFS3_MAXPATHLEN; 169 resp->pages = rqstp->rq_next_page++; 170 resp->status = nfsd_readlink(rqstp, &resp->fh, 171 page_address(*resp->pages), &resp->len); 172 resp->status = nfsd3_map_status(resp->status); 173 return rpc_success; 174 } 175 176 /* 177 * Read a portion of a file. 178 */ 179 static __be32 180 nfsd3_proc_read(struct svc_rqst *rqstp) 181 { 182 struct nfsd3_readargs *argp = rqstp->rq_argp; 183 struct nfsd3_readres *resp = rqstp->rq_resp; 184 185 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 186 SVCFH_fmt(&argp->fh), 187 (unsigned long) argp->count, 188 (unsigned long long) argp->offset); 189 190 argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); 191 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 192 if (argp->offset > (u64)OFFSET_MAX) 193 argp->offset = (u64)OFFSET_MAX; 194 if (argp->offset + argp->count > (u64)OFFSET_MAX) 195 argp->count = (u64)OFFSET_MAX - argp->offset; 196 197 resp->pages = rqstp->rq_next_page; 198 199 /* Obtain buffer pointer for payload. 200 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 201 * + 1 (xdr opaque byte count) = 26 202 */ 203 resp->count = argp->count; 204 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3) << 2) + 205 resp->count + 4); 206 207 fh_copy(&resp->fh, &argp->fh); 208 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 209 &resp->count, &resp->eof); 210 resp->status = nfsd3_map_status(resp->status); 211 return rpc_success; 212 } 213 214 /* 215 * Write data to a file 216 */ 217 static __be32 218 nfsd3_proc_write(struct svc_rqst *rqstp) 219 { 220 struct nfsd3_writeargs *argp = rqstp->rq_argp; 221 struct nfsd3_writeres *resp = rqstp->rq_resp; 222 unsigned long cnt = argp->len; 223 unsigned int nvecs; 224 225 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 226 SVCFH_fmt(&argp->fh), 227 argp->len, 228 (unsigned long long) argp->offset, 229 argp->stable ? " stable" : ""); 230 231 resp->status = nfserr_fbig; 232 if (argp->offset > (u64)OFFSET_MAX || 233 argp->offset + argp->len > (u64)OFFSET_MAX) 234 return rpc_success; 235 236 fh_copy(&resp->fh, &argp->fh); 237 resp->committed = argp->stable; 238 nvecs = svc_fill_write_vector(rqstp, &argp->payload); 239 240 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 241 rqstp->rq_vec, nvecs, &cnt, 242 resp->committed, resp->verf); 243 resp->count = cnt; 244 resp->status = nfsd3_map_status(resp->status); 245 return rpc_success; 246 } 247 248 /* 249 * Implement NFSv3's unchecked, guarded, and exclusive CREATE 250 * semantics for regular files. Except for the created file, 251 * this operation is stateless on the server. 252 * 253 * Upon return, caller must release @fhp and @resfhp. 254 */ 255 static __be32 256 nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 257 struct svc_fh *resfhp, struct nfsd3_createargs *argp) 258 { 259 struct iattr *iap = &argp->attrs; 260 struct dentry *parent, *child; 261 struct nfsd_attrs attrs = { 262 .na_iattr = iap, 263 }; 264 __u32 v_mtime, v_atime; 265 struct inode *inode; 266 __be32 status; 267 int host_err; 268 269 if (isdotent(argp->name, argp->len)) 270 return nfserr_exist; 271 if (!(iap->ia_valid & ATTR_MODE)) 272 iap->ia_mode = 0; 273 274 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 275 if (status != nfs_ok) 276 return status; 277 278 parent = fhp->fh_dentry; 279 inode = d_inode(parent); 280 281 host_err = fh_want_write(fhp); 282 if (host_err) 283 return nfserrno(host_err); 284 285 inode_lock_nested(inode, I_MUTEX_PARENT); 286 287 child = lookup_one_len(argp->name, parent, argp->len); 288 if (IS_ERR(child)) { 289 status = nfserrno(PTR_ERR(child)); 290 goto out; 291 } 292 293 if (d_really_is_negative(child)) { 294 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 295 if (status != nfs_ok) 296 goto out; 297 } 298 299 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 300 if (status != nfs_ok) 301 goto out; 302 303 v_mtime = 0; 304 v_atime = 0; 305 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 306 u32 *verifier = (u32 *)argp->verf; 307 308 /* 309 * Solaris 7 gets confused (bugid 4218508) if these have 310 * the high bit set, as do xfs filesystems without the 311 * "bigtime" feature. So just clear the high bits. 312 */ 313 v_mtime = verifier[0] & 0x7fffffff; 314 v_atime = verifier[1] & 0x7fffffff; 315 } 316 317 if (d_really_is_positive(child)) { 318 status = nfs_ok; 319 320 switch (argp->createmode) { 321 case NFS3_CREATE_UNCHECKED: 322 if (!d_is_reg(child)) 323 break; 324 iap->ia_valid &= ATTR_SIZE; 325 goto set_attr; 326 case NFS3_CREATE_GUARDED: 327 status = nfserr_exist; 328 break; 329 case NFS3_CREATE_EXCLUSIVE: 330 if (inode_get_mtime_sec(d_inode(child)) == v_mtime && 331 inode_get_atime_sec(d_inode(child)) == v_atime && 332 d_inode(child)->i_size == 0) { 333 break; 334 } 335 status = nfserr_exist; 336 } 337 goto out; 338 } 339 340 if (!IS_POSIXACL(inode)) 341 iap->ia_mode &= ~current_umask(); 342 343 status = fh_fill_pre_attrs(fhp); 344 if (status != nfs_ok) 345 goto out; 346 host_err = vfs_create(&nop_mnt_idmap, inode, child, iap->ia_mode, true); 347 if (host_err < 0) { 348 status = nfserrno(host_err); 349 goto out; 350 } 351 fh_fill_post_attrs(fhp); 352 353 /* A newly created file already has a file size of zero. */ 354 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 355 iap->ia_valid &= ~ATTR_SIZE; 356 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 357 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 358 ATTR_MTIME_SET | ATTR_ATIME_SET; 359 iap->ia_mtime.tv_sec = v_mtime; 360 iap->ia_atime.tv_sec = v_atime; 361 iap->ia_mtime.tv_nsec = 0; 362 iap->ia_atime.tv_nsec = 0; 363 } 364 365 set_attr: 366 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 367 368 out: 369 inode_unlock(inode); 370 if (child && !IS_ERR(child)) 371 dput(child); 372 fh_drop_write(fhp); 373 return status; 374 } 375 376 static __be32 377 nfsd3_proc_create(struct svc_rqst *rqstp) 378 { 379 struct nfsd3_createargs *argp = rqstp->rq_argp; 380 struct nfsd3_diropres *resp = rqstp->rq_resp; 381 svc_fh *dirfhp, *newfhp; 382 383 dprintk("nfsd: CREATE(3) %s %.*s\n", 384 SVCFH_fmt(&argp->fh), 385 argp->len, 386 argp->name); 387 388 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 389 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 390 391 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 392 resp->status = nfsd3_map_status(resp->status); 393 return rpc_success; 394 } 395 396 /* 397 * Make directory. This operation is not idempotent. 398 */ 399 static __be32 400 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 401 { 402 struct nfsd3_createargs *argp = rqstp->rq_argp; 403 struct nfsd3_diropres *resp = rqstp->rq_resp; 404 struct nfsd_attrs attrs = { 405 .na_iattr = &argp->attrs, 406 }; 407 408 dprintk("nfsd: MKDIR(3) %s %.*s\n", 409 SVCFH_fmt(&argp->fh), 410 argp->len, 411 argp->name); 412 413 argp->attrs.ia_valid &= ~ATTR_SIZE; 414 fh_copy(&resp->dirfh, &argp->fh); 415 fh_init(&resp->fh, NFS3_FHSIZE); 416 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 417 &attrs, S_IFDIR, 0, &resp->fh); 418 resp->status = nfsd3_map_status(resp->status); 419 return rpc_success; 420 } 421 422 static __be32 423 nfsd3_proc_symlink(struct svc_rqst *rqstp) 424 { 425 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 426 struct nfsd3_diropres *resp = rqstp->rq_resp; 427 struct nfsd_attrs attrs = { 428 .na_iattr = &argp->attrs, 429 }; 430 431 if (argp->tlen == 0) { 432 resp->status = nfserr_inval; 433 goto out; 434 } 435 if (argp->tlen > NFS3_MAXPATHLEN) { 436 resp->status = nfserr_nametoolong; 437 goto out; 438 } 439 440 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 441 page_address(rqstp->rq_arg.pages[0]), 442 argp->tlen); 443 if (IS_ERR(argp->tname)) { 444 resp->status = nfserrno(PTR_ERR(argp->tname)); 445 goto out; 446 } 447 448 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 449 SVCFH_fmt(&argp->ffh), 450 argp->flen, argp->fname, 451 argp->tlen, argp->tname); 452 453 fh_copy(&resp->dirfh, &argp->ffh); 454 fh_init(&resp->fh, NFS3_FHSIZE); 455 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 456 argp->flen, argp->tname, &attrs, &resp->fh); 457 kfree(argp->tname); 458 out: 459 resp->status = nfsd3_map_status(resp->status); 460 return rpc_success; 461 } 462 463 /* 464 * Make socket/fifo/device. 465 */ 466 static __be32 467 nfsd3_proc_mknod(struct svc_rqst *rqstp) 468 { 469 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 470 struct nfsd3_diropres *resp = rqstp->rq_resp; 471 struct nfsd_attrs attrs = { 472 .na_iattr = &argp->attrs, 473 }; 474 int type; 475 dev_t rdev = 0; 476 477 dprintk("nfsd: MKNOD(3) %s %.*s\n", 478 SVCFH_fmt(&argp->fh), 479 argp->len, 480 argp->name); 481 482 fh_copy(&resp->dirfh, &argp->fh); 483 fh_init(&resp->fh, NFS3_FHSIZE); 484 485 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 486 rdev = MKDEV(argp->major, argp->minor); 487 if (MAJOR(rdev) != argp->major || 488 MINOR(rdev) != argp->minor) { 489 resp->status = nfserr_inval; 490 goto out; 491 } 492 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 493 resp->status = nfserr_badtype; 494 goto out; 495 } 496 497 type = nfs3_ftypes[argp->ftype]; 498 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 499 &attrs, type, rdev, &resp->fh); 500 out: 501 resp->status = nfsd3_map_status(resp->status); 502 return rpc_success; 503 } 504 505 /* 506 * Remove file/fifo/socket etc. 507 */ 508 static __be32 509 nfsd3_proc_remove(struct svc_rqst *rqstp) 510 { 511 struct nfsd3_diropargs *argp = rqstp->rq_argp; 512 struct nfsd3_attrstat *resp = rqstp->rq_resp; 513 514 dprintk("nfsd: REMOVE(3) %s %.*s\n", 515 SVCFH_fmt(&argp->fh), 516 argp->len, 517 argp->name); 518 519 /* Unlink. -S_IFDIR means file must not be a directory */ 520 fh_copy(&resp->fh, &argp->fh); 521 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 522 argp->name, argp->len); 523 resp->status = nfsd3_map_status(resp->status); 524 return rpc_success; 525 } 526 527 /* 528 * Remove a directory 529 */ 530 static __be32 531 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 532 { 533 struct nfsd3_diropargs *argp = rqstp->rq_argp; 534 struct nfsd3_attrstat *resp = rqstp->rq_resp; 535 536 dprintk("nfsd: RMDIR(3) %s %.*s\n", 537 SVCFH_fmt(&argp->fh), 538 argp->len, 539 argp->name); 540 541 fh_copy(&resp->fh, &argp->fh); 542 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 543 argp->name, argp->len); 544 resp->status = nfsd3_map_status(resp->status); 545 return rpc_success; 546 } 547 548 static __be32 549 nfsd3_proc_rename(struct svc_rqst *rqstp) 550 { 551 struct nfsd3_renameargs *argp = rqstp->rq_argp; 552 struct nfsd3_renameres *resp = rqstp->rq_resp; 553 554 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 555 SVCFH_fmt(&argp->ffh), 556 argp->flen, 557 argp->fname); 558 dprintk("nfsd: -> %s %.*s\n", 559 SVCFH_fmt(&argp->tfh), 560 argp->tlen, 561 argp->tname); 562 563 fh_copy(&resp->ffh, &argp->ffh); 564 fh_copy(&resp->tfh, &argp->tfh); 565 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 566 &resp->tfh, argp->tname, argp->tlen); 567 resp->status = nfsd3_map_status(resp->status); 568 return rpc_success; 569 } 570 571 static __be32 572 nfsd3_proc_link(struct svc_rqst *rqstp) 573 { 574 struct nfsd3_linkargs *argp = rqstp->rq_argp; 575 struct nfsd3_linkres *resp = rqstp->rq_resp; 576 577 dprintk("nfsd: LINK(3) %s ->\n", 578 SVCFH_fmt(&argp->ffh)); 579 dprintk("nfsd: -> %s %.*s\n", 580 SVCFH_fmt(&argp->tfh), 581 argp->tlen, 582 argp->tname); 583 584 fh_copy(&resp->fh, &argp->ffh); 585 fh_copy(&resp->tfh, &argp->tfh); 586 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 587 &resp->fh); 588 resp->status = nfsd3_map_status(resp->status); 589 return rpc_success; 590 } 591 592 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 593 struct nfsd3_readdirres *resp, 594 u32 count) 595 { 596 struct xdr_buf *buf = &resp->dirlist; 597 struct xdr_stream *xdr = &resp->xdr; 598 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 599 svc_max_payload(rqstp)); 600 601 memset(buf, 0, sizeof(*buf)); 602 603 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 604 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 605 buf->buflen -= XDR_UNIT * 2; 606 buf->pages = rqstp->rq_next_page; 607 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 608 609 xdr_init_encode_pages(xdr, buf, buf->pages, NULL); 610 } 611 612 /* 613 * Read a portion of a directory. 614 */ 615 static __be32 616 nfsd3_proc_readdir(struct svc_rqst *rqstp) 617 { 618 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 619 struct nfsd3_readdirres *resp = rqstp->rq_resp; 620 loff_t offset; 621 622 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 623 SVCFH_fmt(&argp->fh), 624 argp->count, (u32) argp->cookie); 625 626 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 627 628 fh_copy(&resp->fh, &argp->fh); 629 resp->common.err = nfs_ok; 630 resp->cookie_offset = 0; 631 resp->rqstp = rqstp; 632 offset = argp->cookie; 633 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 634 &resp->common, nfs3svc_encode_entry3); 635 memcpy(resp->verf, argp->verf, 8); 636 nfs3svc_encode_cookie3(resp, offset); 637 638 /* Recycle only pages that were part of the reply */ 639 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 640 641 resp->status = nfsd3_map_status(resp->status); 642 return rpc_success; 643 } 644 645 /* 646 * Read a portion of a directory, including file handles and attrs. 647 * For now, we choose to ignore the dircount parameter. 648 */ 649 static __be32 650 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 651 { 652 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 653 struct nfsd3_readdirres *resp = rqstp->rq_resp; 654 loff_t offset; 655 656 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 657 SVCFH_fmt(&argp->fh), 658 argp->count, (u32) argp->cookie); 659 660 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 661 662 fh_copy(&resp->fh, &argp->fh); 663 resp->common.err = nfs_ok; 664 resp->cookie_offset = 0; 665 resp->rqstp = rqstp; 666 offset = argp->cookie; 667 668 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 669 if (resp->status != nfs_ok) 670 goto out; 671 672 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 673 resp->status = nfserr_notsupp; 674 goto out; 675 } 676 677 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 678 &resp->common, nfs3svc_encode_entryplus3); 679 memcpy(resp->verf, argp->verf, 8); 680 nfs3svc_encode_cookie3(resp, offset); 681 682 /* Recycle only pages that were part of the reply */ 683 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 684 685 out: 686 resp->status = nfsd3_map_status(resp->status); 687 return rpc_success; 688 } 689 690 /* 691 * Get file system stats 692 */ 693 static __be32 694 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 695 { 696 struct nfsd_fhandle *argp = rqstp->rq_argp; 697 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 698 699 dprintk("nfsd: FSSTAT(3) %s\n", 700 SVCFH_fmt(&argp->fh)); 701 702 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 703 fh_put(&argp->fh); 704 resp->status = nfsd3_map_status(resp->status); 705 return rpc_success; 706 } 707 708 /* 709 * Get file system info 710 */ 711 static __be32 712 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 713 { 714 struct nfsd_fhandle *argp = rqstp->rq_argp; 715 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 716 u32 max_blocksize = svc_max_payload(rqstp); 717 718 dprintk("nfsd: FSINFO(3) %s\n", 719 SVCFH_fmt(&argp->fh)); 720 721 resp->f_rtmax = max_blocksize; 722 resp->f_rtpref = max_blocksize; 723 resp->f_rtmult = PAGE_SIZE; 724 resp->f_wtmax = max_blocksize; 725 resp->f_wtpref = max_blocksize; 726 resp->f_wtmult = PAGE_SIZE; 727 resp->f_dtpref = max_blocksize; 728 resp->f_maxfilesize = ~(u32) 0; 729 resp->f_properties = NFS3_FSF_DEFAULT; 730 731 resp->status = fh_verify(rqstp, &argp->fh, 0, 732 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 733 734 /* Check special features of the file system. May request 735 * different read/write sizes for file systems known to have 736 * problems with large blocks */ 737 if (resp->status == nfs_ok) { 738 struct super_block *sb = argp->fh.fh_dentry->d_sb; 739 740 /* Note that we don't care for remote fs's here */ 741 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 742 resp->f_properties = NFS3_FSF_BILLYBOY; 743 } 744 resp->f_maxfilesize = sb->s_maxbytes; 745 } 746 747 fh_put(&argp->fh); 748 resp->status = nfsd3_map_status(resp->status); 749 return rpc_success; 750 } 751 752 /* 753 * Get pathconf info for the specified file 754 */ 755 static __be32 756 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 757 { 758 struct nfsd_fhandle *argp = rqstp->rq_argp; 759 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 760 761 dprintk("nfsd: PATHCONF(3) %s\n", 762 SVCFH_fmt(&argp->fh)); 763 764 /* Set default pathconf */ 765 resp->p_link_max = 255; /* at least */ 766 resp->p_name_max = 255; /* at least */ 767 resp->p_no_trunc = 0; 768 resp->p_chown_restricted = 1; 769 resp->p_case_insensitive = 0; 770 resp->p_case_preserving = 1; 771 772 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 773 774 if (resp->status == nfs_ok) { 775 struct super_block *sb = argp->fh.fh_dentry->d_sb; 776 777 /* Note that we don't care for remote fs's here */ 778 switch (sb->s_magic) { 779 case EXT2_SUPER_MAGIC: 780 resp->p_link_max = EXT2_LINK_MAX; 781 resp->p_name_max = EXT2_NAME_LEN; 782 break; 783 case MSDOS_SUPER_MAGIC: 784 resp->p_case_insensitive = 1; 785 resp->p_case_preserving = 0; 786 break; 787 } 788 } 789 790 fh_put(&argp->fh); 791 resp->status = nfsd3_map_status(resp->status); 792 return rpc_success; 793 } 794 795 /* 796 * Commit a file (range) to stable storage. 797 */ 798 static __be32 799 nfsd3_proc_commit(struct svc_rqst *rqstp) 800 { 801 struct nfsd3_commitargs *argp = rqstp->rq_argp; 802 struct nfsd3_commitres *resp = rqstp->rq_resp; 803 struct nfsd_file *nf; 804 805 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 806 SVCFH_fmt(&argp->fh), 807 argp->count, 808 (unsigned long long) argp->offset); 809 810 fh_copy(&resp->fh, &argp->fh); 811 resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | 812 NFSD_MAY_NOT_BREAK_LEASE, &nf); 813 if (resp->status) 814 goto out; 815 resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, 816 argp->count, resp->verf); 817 nfsd_file_put(nf); 818 out: 819 resp->status = nfsd3_map_status(resp->status); 820 return rpc_success; 821 } 822 823 824 /* 825 * NFSv3 Server procedures. 826 * Only the results of non-idempotent operations are cached. 827 */ 828 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 829 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 830 #define nfsd3_mkdirargs nfsd3_createargs 831 #define nfsd3_readdirplusargs nfsd3_readdirargs 832 #define nfsd3_fhandleargs nfsd_fhandle 833 #define nfsd3_attrstatres nfsd3_attrstat 834 #define nfsd3_wccstatres nfsd3_attrstat 835 #define nfsd3_createres nfsd3_diropres 836 837 #define ST 1 /* status*/ 838 #define FH 17 /* filehandle with length */ 839 #define AT 21 /* attributes */ 840 #define pAT (1+AT) /* post attributes - conditional */ 841 #define WC (7+pAT) /* WCC attributes */ 842 843 static const struct svc_procedure nfsd_procedures3[22] = { 844 [NFS3PROC_NULL] = { 845 .pc_func = nfsd3_proc_null, 846 .pc_decode = nfssvc_decode_voidarg, 847 .pc_encode = nfssvc_encode_voidres, 848 .pc_argsize = sizeof(struct nfsd_voidargs), 849 .pc_argzero = sizeof(struct nfsd_voidargs), 850 .pc_ressize = sizeof(struct nfsd_voidres), 851 .pc_cachetype = RC_NOCACHE, 852 .pc_xdrressize = ST, 853 .pc_name = "NULL", 854 }, 855 [NFS3PROC_GETATTR] = { 856 .pc_func = nfsd3_proc_getattr, 857 .pc_decode = nfs3svc_decode_fhandleargs, 858 .pc_encode = nfs3svc_encode_getattrres, 859 .pc_release = nfs3svc_release_fhandle, 860 .pc_argsize = sizeof(struct nfsd_fhandle), 861 .pc_argzero = sizeof(struct nfsd_fhandle), 862 .pc_ressize = sizeof(struct nfsd3_attrstatres), 863 .pc_cachetype = RC_NOCACHE, 864 .pc_xdrressize = ST+AT, 865 .pc_name = "GETATTR", 866 }, 867 [NFS3PROC_SETATTR] = { 868 .pc_func = nfsd3_proc_setattr, 869 .pc_decode = nfs3svc_decode_sattrargs, 870 .pc_encode = nfs3svc_encode_wccstatres, 871 .pc_release = nfs3svc_release_fhandle, 872 .pc_argsize = sizeof(struct nfsd3_sattrargs), 873 .pc_argzero = sizeof(struct nfsd3_sattrargs), 874 .pc_ressize = sizeof(struct nfsd3_wccstatres), 875 .pc_cachetype = RC_REPLBUFF, 876 .pc_xdrressize = ST+WC, 877 .pc_name = "SETATTR", 878 }, 879 [NFS3PROC_LOOKUP] = { 880 .pc_func = nfsd3_proc_lookup, 881 .pc_decode = nfs3svc_decode_diropargs, 882 .pc_encode = nfs3svc_encode_lookupres, 883 .pc_release = nfs3svc_release_fhandle2, 884 .pc_argsize = sizeof(struct nfsd3_diropargs), 885 .pc_argzero = sizeof(struct nfsd3_diropargs), 886 .pc_ressize = sizeof(struct nfsd3_diropres), 887 .pc_cachetype = RC_NOCACHE, 888 .pc_xdrressize = ST+FH+pAT+pAT, 889 .pc_name = "LOOKUP", 890 }, 891 [NFS3PROC_ACCESS] = { 892 .pc_func = nfsd3_proc_access, 893 .pc_decode = nfs3svc_decode_accessargs, 894 .pc_encode = nfs3svc_encode_accessres, 895 .pc_release = nfs3svc_release_fhandle, 896 .pc_argsize = sizeof(struct nfsd3_accessargs), 897 .pc_argzero = sizeof(struct nfsd3_accessargs), 898 .pc_ressize = sizeof(struct nfsd3_accessres), 899 .pc_cachetype = RC_NOCACHE, 900 .pc_xdrressize = ST+pAT+1, 901 .pc_name = "ACCESS", 902 }, 903 [NFS3PROC_READLINK] = { 904 .pc_func = nfsd3_proc_readlink, 905 .pc_decode = nfs3svc_decode_fhandleargs, 906 .pc_encode = nfs3svc_encode_readlinkres, 907 .pc_release = nfs3svc_release_fhandle, 908 .pc_argsize = sizeof(struct nfsd_fhandle), 909 .pc_argzero = sizeof(struct nfsd_fhandle), 910 .pc_ressize = sizeof(struct nfsd3_readlinkres), 911 .pc_cachetype = RC_NOCACHE, 912 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 913 .pc_name = "READLINK", 914 }, 915 [NFS3PROC_READ] = { 916 .pc_func = nfsd3_proc_read, 917 .pc_decode = nfs3svc_decode_readargs, 918 .pc_encode = nfs3svc_encode_readres, 919 .pc_release = nfs3svc_release_fhandle, 920 .pc_argsize = sizeof(struct nfsd3_readargs), 921 .pc_argzero = sizeof(struct nfsd3_readargs), 922 .pc_ressize = sizeof(struct nfsd3_readres), 923 .pc_cachetype = RC_NOCACHE, 924 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 925 .pc_name = "READ", 926 }, 927 [NFS3PROC_WRITE] = { 928 .pc_func = nfsd3_proc_write, 929 .pc_decode = nfs3svc_decode_writeargs, 930 .pc_encode = nfs3svc_encode_writeres, 931 .pc_release = nfs3svc_release_fhandle, 932 .pc_argsize = sizeof(struct nfsd3_writeargs), 933 .pc_argzero = sizeof(struct nfsd3_writeargs), 934 .pc_ressize = sizeof(struct nfsd3_writeres), 935 .pc_cachetype = RC_REPLBUFF, 936 .pc_xdrressize = ST+WC+4, 937 .pc_name = "WRITE", 938 }, 939 [NFS3PROC_CREATE] = { 940 .pc_func = nfsd3_proc_create, 941 .pc_decode = nfs3svc_decode_createargs, 942 .pc_encode = nfs3svc_encode_createres, 943 .pc_release = nfs3svc_release_fhandle2, 944 .pc_argsize = sizeof(struct nfsd3_createargs), 945 .pc_argzero = sizeof(struct nfsd3_createargs), 946 .pc_ressize = sizeof(struct nfsd3_createres), 947 .pc_cachetype = RC_REPLBUFF, 948 .pc_xdrressize = ST+(1+FH+pAT)+WC, 949 .pc_name = "CREATE", 950 }, 951 [NFS3PROC_MKDIR] = { 952 .pc_func = nfsd3_proc_mkdir, 953 .pc_decode = nfs3svc_decode_mkdirargs, 954 .pc_encode = nfs3svc_encode_createres, 955 .pc_release = nfs3svc_release_fhandle2, 956 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 957 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 958 .pc_ressize = sizeof(struct nfsd3_createres), 959 .pc_cachetype = RC_REPLBUFF, 960 .pc_xdrressize = ST+(1+FH+pAT)+WC, 961 .pc_name = "MKDIR", 962 }, 963 [NFS3PROC_SYMLINK] = { 964 .pc_func = nfsd3_proc_symlink, 965 .pc_decode = nfs3svc_decode_symlinkargs, 966 .pc_encode = nfs3svc_encode_createres, 967 .pc_release = nfs3svc_release_fhandle2, 968 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 969 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 970 .pc_ressize = sizeof(struct nfsd3_createres), 971 .pc_cachetype = RC_REPLBUFF, 972 .pc_xdrressize = ST+(1+FH+pAT)+WC, 973 .pc_name = "SYMLINK", 974 }, 975 [NFS3PROC_MKNOD] = { 976 .pc_func = nfsd3_proc_mknod, 977 .pc_decode = nfs3svc_decode_mknodargs, 978 .pc_encode = nfs3svc_encode_createres, 979 .pc_release = nfs3svc_release_fhandle2, 980 .pc_argsize = sizeof(struct nfsd3_mknodargs), 981 .pc_argzero = sizeof(struct nfsd3_mknodargs), 982 .pc_ressize = sizeof(struct nfsd3_createres), 983 .pc_cachetype = RC_REPLBUFF, 984 .pc_xdrressize = ST+(1+FH+pAT)+WC, 985 .pc_name = "MKNOD", 986 }, 987 [NFS3PROC_REMOVE] = { 988 .pc_func = nfsd3_proc_remove, 989 .pc_decode = nfs3svc_decode_diropargs, 990 .pc_encode = nfs3svc_encode_wccstatres, 991 .pc_release = nfs3svc_release_fhandle, 992 .pc_argsize = sizeof(struct nfsd3_diropargs), 993 .pc_argzero = sizeof(struct nfsd3_diropargs), 994 .pc_ressize = sizeof(struct nfsd3_wccstatres), 995 .pc_cachetype = RC_REPLBUFF, 996 .pc_xdrressize = ST+WC, 997 .pc_name = "REMOVE", 998 }, 999 [NFS3PROC_RMDIR] = { 1000 .pc_func = nfsd3_proc_rmdir, 1001 .pc_decode = nfs3svc_decode_diropargs, 1002 .pc_encode = nfs3svc_encode_wccstatres, 1003 .pc_release = nfs3svc_release_fhandle, 1004 .pc_argsize = sizeof(struct nfsd3_diropargs), 1005 .pc_argzero = sizeof(struct nfsd3_diropargs), 1006 .pc_ressize = sizeof(struct nfsd3_wccstatres), 1007 .pc_cachetype = RC_REPLBUFF, 1008 .pc_xdrressize = ST+WC, 1009 .pc_name = "RMDIR", 1010 }, 1011 [NFS3PROC_RENAME] = { 1012 .pc_func = nfsd3_proc_rename, 1013 .pc_decode = nfs3svc_decode_renameargs, 1014 .pc_encode = nfs3svc_encode_renameres, 1015 .pc_release = nfs3svc_release_fhandle2, 1016 .pc_argsize = sizeof(struct nfsd3_renameargs), 1017 .pc_argzero = sizeof(struct nfsd3_renameargs), 1018 .pc_ressize = sizeof(struct nfsd3_renameres), 1019 .pc_cachetype = RC_REPLBUFF, 1020 .pc_xdrressize = ST+WC+WC, 1021 .pc_name = "RENAME", 1022 }, 1023 [NFS3PROC_LINK] = { 1024 .pc_func = nfsd3_proc_link, 1025 .pc_decode = nfs3svc_decode_linkargs, 1026 .pc_encode = nfs3svc_encode_linkres, 1027 .pc_release = nfs3svc_release_fhandle2, 1028 .pc_argsize = sizeof(struct nfsd3_linkargs), 1029 .pc_argzero = sizeof(struct nfsd3_linkargs), 1030 .pc_ressize = sizeof(struct nfsd3_linkres), 1031 .pc_cachetype = RC_REPLBUFF, 1032 .pc_xdrressize = ST+pAT+WC, 1033 .pc_name = "LINK", 1034 }, 1035 [NFS3PROC_READDIR] = { 1036 .pc_func = nfsd3_proc_readdir, 1037 .pc_decode = nfs3svc_decode_readdirargs, 1038 .pc_encode = nfs3svc_encode_readdirres, 1039 .pc_release = nfs3svc_release_fhandle, 1040 .pc_argsize = sizeof(struct nfsd3_readdirargs), 1041 .pc_argzero = sizeof(struct nfsd3_readdirargs), 1042 .pc_ressize = sizeof(struct nfsd3_readdirres), 1043 .pc_cachetype = RC_NOCACHE, 1044 .pc_name = "READDIR", 1045 }, 1046 [NFS3PROC_READDIRPLUS] = { 1047 .pc_func = nfsd3_proc_readdirplus, 1048 .pc_decode = nfs3svc_decode_readdirplusargs, 1049 .pc_encode = nfs3svc_encode_readdirres, 1050 .pc_release = nfs3svc_release_fhandle, 1051 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 1052 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 1053 .pc_ressize = sizeof(struct nfsd3_readdirres), 1054 .pc_cachetype = RC_NOCACHE, 1055 .pc_name = "READDIRPLUS", 1056 }, 1057 [NFS3PROC_FSSTAT] = { 1058 .pc_func = nfsd3_proc_fsstat, 1059 .pc_decode = nfs3svc_decode_fhandleargs, 1060 .pc_encode = nfs3svc_encode_fsstatres, 1061 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1062 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1063 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1064 .pc_cachetype = RC_NOCACHE, 1065 .pc_xdrressize = ST+pAT+2*6+1, 1066 .pc_name = "FSSTAT", 1067 }, 1068 [NFS3PROC_FSINFO] = { 1069 .pc_func = nfsd3_proc_fsinfo, 1070 .pc_decode = nfs3svc_decode_fhandleargs, 1071 .pc_encode = nfs3svc_encode_fsinfores, 1072 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1073 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1074 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1075 .pc_cachetype = RC_NOCACHE, 1076 .pc_xdrressize = ST+pAT+12, 1077 .pc_name = "FSINFO", 1078 }, 1079 [NFS3PROC_PATHCONF] = { 1080 .pc_func = nfsd3_proc_pathconf, 1081 .pc_decode = nfs3svc_decode_fhandleargs, 1082 .pc_encode = nfs3svc_encode_pathconfres, 1083 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1084 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1085 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1086 .pc_cachetype = RC_NOCACHE, 1087 .pc_xdrressize = ST+pAT+6, 1088 .pc_name = "PATHCONF", 1089 }, 1090 [NFS3PROC_COMMIT] = { 1091 .pc_func = nfsd3_proc_commit, 1092 .pc_decode = nfs3svc_decode_commitargs, 1093 .pc_encode = nfs3svc_encode_commitres, 1094 .pc_release = nfs3svc_release_fhandle, 1095 .pc_argsize = sizeof(struct nfsd3_commitargs), 1096 .pc_argzero = sizeof(struct nfsd3_commitargs), 1097 .pc_ressize = sizeof(struct nfsd3_commitres), 1098 .pc_cachetype = RC_NOCACHE, 1099 .pc_xdrressize = ST+WC+2, 1100 .pc_name = "COMMIT", 1101 }, 1102 }; 1103 1104 static DEFINE_PER_CPU_ALIGNED(unsigned long, 1105 nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]); 1106 const struct svc_version nfsd_version3 = { 1107 .vs_vers = 3, 1108 .vs_nproc = ARRAY_SIZE(nfsd_procedures3), 1109 .vs_proc = nfsd_procedures3, 1110 .vs_dispatch = nfsd_dispatch, 1111 .vs_count = nfsd_count3, 1112 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1113 }; 1114