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(&nop_mnt_idmap, 288 &QSTR_LEN(argp->name, argp->len), 289 parent); 290 if (IS_ERR(child)) { 291 status = nfserrno(PTR_ERR(child)); 292 goto out; 293 } 294 295 if (d_really_is_negative(child)) { 296 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 297 if (status != nfs_ok) 298 goto out; 299 } 300 301 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 302 if (status != nfs_ok) 303 goto out; 304 305 v_mtime = 0; 306 v_atime = 0; 307 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 308 u32 *verifier = (u32 *)argp->verf; 309 310 /* 311 * Solaris 7 gets confused (bugid 4218508) if these have 312 * the high bit set, as do xfs filesystems without the 313 * "bigtime" feature. So just clear the high bits. 314 */ 315 v_mtime = verifier[0] & 0x7fffffff; 316 v_atime = verifier[1] & 0x7fffffff; 317 } 318 319 if (d_really_is_positive(child)) { 320 status = nfs_ok; 321 322 switch (argp->createmode) { 323 case NFS3_CREATE_UNCHECKED: 324 if (!d_is_reg(child)) 325 break; 326 iap->ia_valid &= ATTR_SIZE; 327 goto set_attr; 328 case NFS3_CREATE_GUARDED: 329 status = nfserr_exist; 330 break; 331 case NFS3_CREATE_EXCLUSIVE: 332 if (inode_get_mtime_sec(d_inode(child)) == v_mtime && 333 inode_get_atime_sec(d_inode(child)) == v_atime && 334 d_inode(child)->i_size == 0) { 335 break; 336 } 337 status = nfserr_exist; 338 } 339 goto out; 340 } 341 342 if (!IS_POSIXACL(inode)) 343 iap->ia_mode &= ~current_umask(); 344 345 status = fh_fill_pre_attrs(fhp); 346 if (status != nfs_ok) 347 goto out; 348 host_err = vfs_create(&nop_mnt_idmap, inode, child, iap->ia_mode, true); 349 if (host_err < 0) { 350 status = nfserrno(host_err); 351 goto out; 352 } 353 fh_fill_post_attrs(fhp); 354 355 /* A newly created file already has a file size of zero. */ 356 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 357 iap->ia_valid &= ~ATTR_SIZE; 358 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 359 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 360 ATTR_MTIME_SET | ATTR_ATIME_SET; 361 iap->ia_mtime.tv_sec = v_mtime; 362 iap->ia_atime.tv_sec = v_atime; 363 iap->ia_mtime.tv_nsec = 0; 364 iap->ia_atime.tv_nsec = 0; 365 } 366 367 set_attr: 368 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 369 370 out: 371 inode_unlock(inode); 372 if (child && !IS_ERR(child)) 373 dput(child); 374 fh_drop_write(fhp); 375 return status; 376 } 377 378 static __be32 379 nfsd3_proc_create(struct svc_rqst *rqstp) 380 { 381 struct nfsd3_createargs *argp = rqstp->rq_argp; 382 struct nfsd3_diropres *resp = rqstp->rq_resp; 383 svc_fh *dirfhp, *newfhp; 384 385 dprintk("nfsd: CREATE(3) %s %.*s\n", 386 SVCFH_fmt(&argp->fh), 387 argp->len, 388 argp->name); 389 390 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 391 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 392 393 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 394 resp->status = nfsd3_map_status(resp->status); 395 return rpc_success; 396 } 397 398 /* 399 * Make directory. This operation is not idempotent. 400 */ 401 static __be32 402 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 403 { 404 struct nfsd3_createargs *argp = rqstp->rq_argp; 405 struct nfsd3_diropres *resp = rqstp->rq_resp; 406 struct nfsd_attrs attrs = { 407 .na_iattr = &argp->attrs, 408 }; 409 410 dprintk("nfsd: MKDIR(3) %s %.*s\n", 411 SVCFH_fmt(&argp->fh), 412 argp->len, 413 argp->name); 414 415 argp->attrs.ia_valid &= ~ATTR_SIZE; 416 fh_copy(&resp->dirfh, &argp->fh); 417 fh_init(&resp->fh, NFS3_FHSIZE); 418 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 419 &attrs, S_IFDIR, 0, &resp->fh); 420 resp->status = nfsd3_map_status(resp->status); 421 return rpc_success; 422 } 423 424 static __be32 425 nfsd3_proc_symlink(struct svc_rqst *rqstp) 426 { 427 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 428 struct nfsd3_diropres *resp = rqstp->rq_resp; 429 struct nfsd_attrs attrs = { 430 .na_iattr = &argp->attrs, 431 }; 432 433 if (argp->tlen == 0) { 434 resp->status = nfserr_inval; 435 goto out; 436 } 437 if (argp->tlen > NFS3_MAXPATHLEN) { 438 resp->status = nfserr_nametoolong; 439 goto out; 440 } 441 442 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 443 page_address(rqstp->rq_arg.pages[0]), 444 argp->tlen); 445 if (IS_ERR(argp->tname)) { 446 resp->status = nfserrno(PTR_ERR(argp->tname)); 447 goto out; 448 } 449 450 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 451 SVCFH_fmt(&argp->ffh), 452 argp->flen, argp->fname, 453 argp->tlen, argp->tname); 454 455 fh_copy(&resp->dirfh, &argp->ffh); 456 fh_init(&resp->fh, NFS3_FHSIZE); 457 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 458 argp->flen, argp->tname, &attrs, &resp->fh); 459 kfree(argp->tname); 460 out: 461 resp->status = nfsd3_map_status(resp->status); 462 return rpc_success; 463 } 464 465 /* 466 * Make socket/fifo/device. 467 */ 468 static __be32 469 nfsd3_proc_mknod(struct svc_rqst *rqstp) 470 { 471 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 472 struct nfsd3_diropres *resp = rqstp->rq_resp; 473 struct nfsd_attrs attrs = { 474 .na_iattr = &argp->attrs, 475 }; 476 int type; 477 dev_t rdev = 0; 478 479 dprintk("nfsd: MKNOD(3) %s %.*s\n", 480 SVCFH_fmt(&argp->fh), 481 argp->len, 482 argp->name); 483 484 fh_copy(&resp->dirfh, &argp->fh); 485 fh_init(&resp->fh, NFS3_FHSIZE); 486 487 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 488 rdev = MKDEV(argp->major, argp->minor); 489 if (MAJOR(rdev) != argp->major || 490 MINOR(rdev) != argp->minor) { 491 resp->status = nfserr_inval; 492 goto out; 493 } 494 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 495 resp->status = nfserr_badtype; 496 goto out; 497 } 498 499 type = nfs3_ftypes[argp->ftype]; 500 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 501 &attrs, type, rdev, &resp->fh); 502 out: 503 resp->status = nfsd3_map_status(resp->status); 504 return rpc_success; 505 } 506 507 /* 508 * Remove file/fifo/socket etc. 509 */ 510 static __be32 511 nfsd3_proc_remove(struct svc_rqst *rqstp) 512 { 513 struct nfsd3_diropargs *argp = rqstp->rq_argp; 514 struct nfsd3_attrstat *resp = rqstp->rq_resp; 515 516 dprintk("nfsd: REMOVE(3) %s %.*s\n", 517 SVCFH_fmt(&argp->fh), 518 argp->len, 519 argp->name); 520 521 /* Unlink. -S_IFDIR means file must not be a directory */ 522 fh_copy(&resp->fh, &argp->fh); 523 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 524 argp->name, argp->len); 525 resp->status = nfsd3_map_status(resp->status); 526 return rpc_success; 527 } 528 529 /* 530 * Remove a directory 531 */ 532 static __be32 533 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 534 { 535 struct nfsd3_diropargs *argp = rqstp->rq_argp; 536 struct nfsd3_attrstat *resp = rqstp->rq_resp; 537 538 dprintk("nfsd: RMDIR(3) %s %.*s\n", 539 SVCFH_fmt(&argp->fh), 540 argp->len, 541 argp->name); 542 543 fh_copy(&resp->fh, &argp->fh); 544 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 545 argp->name, argp->len); 546 resp->status = nfsd3_map_status(resp->status); 547 return rpc_success; 548 } 549 550 static __be32 551 nfsd3_proc_rename(struct svc_rqst *rqstp) 552 { 553 struct nfsd3_renameargs *argp = rqstp->rq_argp; 554 struct nfsd3_renameres *resp = rqstp->rq_resp; 555 556 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 557 SVCFH_fmt(&argp->ffh), 558 argp->flen, 559 argp->fname); 560 dprintk("nfsd: -> %s %.*s\n", 561 SVCFH_fmt(&argp->tfh), 562 argp->tlen, 563 argp->tname); 564 565 fh_copy(&resp->ffh, &argp->ffh); 566 fh_copy(&resp->tfh, &argp->tfh); 567 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 568 &resp->tfh, argp->tname, argp->tlen); 569 resp->status = nfsd3_map_status(resp->status); 570 return rpc_success; 571 } 572 573 static __be32 574 nfsd3_proc_link(struct svc_rqst *rqstp) 575 { 576 struct nfsd3_linkargs *argp = rqstp->rq_argp; 577 struct nfsd3_linkres *resp = rqstp->rq_resp; 578 579 dprintk("nfsd: LINK(3) %s ->\n", 580 SVCFH_fmt(&argp->ffh)); 581 dprintk("nfsd: -> %s %.*s\n", 582 SVCFH_fmt(&argp->tfh), 583 argp->tlen, 584 argp->tname); 585 586 fh_copy(&resp->fh, &argp->ffh); 587 fh_copy(&resp->tfh, &argp->tfh); 588 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 589 &resp->fh); 590 resp->status = nfsd3_map_status(resp->status); 591 return rpc_success; 592 } 593 594 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 595 struct nfsd3_readdirres *resp, 596 u32 count) 597 { 598 struct xdr_buf *buf = &resp->dirlist; 599 struct xdr_stream *xdr = &resp->xdr; 600 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 601 svc_max_payload(rqstp)); 602 603 memset(buf, 0, sizeof(*buf)); 604 605 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 606 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 607 buf->buflen -= XDR_UNIT * 2; 608 buf->pages = rqstp->rq_next_page; 609 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 610 611 xdr_init_encode_pages(xdr, buf, buf->pages, NULL); 612 } 613 614 /* 615 * Read a portion of a directory. 616 */ 617 static __be32 618 nfsd3_proc_readdir(struct svc_rqst *rqstp) 619 { 620 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 621 struct nfsd3_readdirres *resp = rqstp->rq_resp; 622 loff_t offset; 623 624 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 625 SVCFH_fmt(&argp->fh), 626 argp->count, (u32) argp->cookie); 627 628 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 629 630 fh_copy(&resp->fh, &argp->fh); 631 resp->common.err = nfs_ok; 632 resp->cookie_offset = 0; 633 resp->rqstp = rqstp; 634 offset = argp->cookie; 635 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 636 &resp->common, nfs3svc_encode_entry3); 637 memcpy(resp->verf, argp->verf, 8); 638 nfs3svc_encode_cookie3(resp, offset); 639 640 /* Recycle only pages that were part of the reply */ 641 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 642 643 resp->status = nfsd3_map_status(resp->status); 644 return rpc_success; 645 } 646 647 /* 648 * Read a portion of a directory, including file handles and attrs. 649 * For now, we choose to ignore the dircount parameter. 650 */ 651 static __be32 652 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 653 { 654 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 655 struct nfsd3_readdirres *resp = rqstp->rq_resp; 656 loff_t offset; 657 658 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 659 SVCFH_fmt(&argp->fh), 660 argp->count, (u32) argp->cookie); 661 662 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 663 664 fh_copy(&resp->fh, &argp->fh); 665 resp->common.err = nfs_ok; 666 resp->cookie_offset = 0; 667 resp->rqstp = rqstp; 668 offset = argp->cookie; 669 670 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 671 if (resp->status != nfs_ok) 672 goto out; 673 674 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 675 resp->status = nfserr_notsupp; 676 goto out; 677 } 678 679 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 680 &resp->common, nfs3svc_encode_entryplus3); 681 memcpy(resp->verf, argp->verf, 8); 682 nfs3svc_encode_cookie3(resp, offset); 683 684 /* Recycle only pages that were part of the reply */ 685 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 686 687 out: 688 resp->status = nfsd3_map_status(resp->status); 689 return rpc_success; 690 } 691 692 /* 693 * Get file system stats 694 */ 695 static __be32 696 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 697 { 698 struct nfsd_fhandle *argp = rqstp->rq_argp; 699 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 700 701 dprintk("nfsd: FSSTAT(3) %s\n", 702 SVCFH_fmt(&argp->fh)); 703 704 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 705 fh_put(&argp->fh); 706 resp->status = nfsd3_map_status(resp->status); 707 return rpc_success; 708 } 709 710 /* 711 * Get file system info 712 */ 713 static __be32 714 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 715 { 716 struct nfsd_fhandle *argp = rqstp->rq_argp; 717 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 718 u32 max_blocksize = svc_max_payload(rqstp); 719 720 dprintk("nfsd: FSINFO(3) %s\n", 721 SVCFH_fmt(&argp->fh)); 722 723 resp->f_rtmax = max_blocksize; 724 resp->f_rtpref = max_blocksize; 725 resp->f_rtmult = PAGE_SIZE; 726 resp->f_wtmax = max_blocksize; 727 resp->f_wtpref = max_blocksize; 728 resp->f_wtmult = PAGE_SIZE; 729 resp->f_dtpref = max_blocksize; 730 resp->f_maxfilesize = ~(u32) 0; 731 resp->f_properties = NFS3_FSF_DEFAULT; 732 733 resp->status = fh_verify(rqstp, &argp->fh, 0, 734 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 735 736 /* Check special features of the file system. May request 737 * different read/write sizes for file systems known to have 738 * problems with large blocks */ 739 if (resp->status == nfs_ok) { 740 struct super_block *sb = argp->fh.fh_dentry->d_sb; 741 742 /* Note that we don't care for remote fs's here */ 743 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 744 resp->f_properties = NFS3_FSF_BILLYBOY; 745 } 746 resp->f_maxfilesize = sb->s_maxbytes; 747 } 748 749 fh_put(&argp->fh); 750 resp->status = nfsd3_map_status(resp->status); 751 return rpc_success; 752 } 753 754 /* 755 * Get pathconf info for the specified file 756 */ 757 static __be32 758 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 759 { 760 struct nfsd_fhandle *argp = rqstp->rq_argp; 761 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 762 763 dprintk("nfsd: PATHCONF(3) %s\n", 764 SVCFH_fmt(&argp->fh)); 765 766 /* Set default pathconf */ 767 resp->p_link_max = 255; /* at least */ 768 resp->p_name_max = 255; /* at least */ 769 resp->p_no_trunc = 0; 770 resp->p_chown_restricted = 1; 771 resp->p_case_insensitive = 0; 772 resp->p_case_preserving = 1; 773 774 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 775 776 if (resp->status == nfs_ok) { 777 struct super_block *sb = argp->fh.fh_dentry->d_sb; 778 779 /* Note that we don't care for remote fs's here */ 780 switch (sb->s_magic) { 781 case EXT2_SUPER_MAGIC: 782 resp->p_link_max = EXT2_LINK_MAX; 783 resp->p_name_max = EXT2_NAME_LEN; 784 break; 785 case MSDOS_SUPER_MAGIC: 786 resp->p_case_insensitive = 1; 787 resp->p_case_preserving = 0; 788 break; 789 } 790 } 791 792 fh_put(&argp->fh); 793 resp->status = nfsd3_map_status(resp->status); 794 return rpc_success; 795 } 796 797 /* 798 * Commit a file (range) to stable storage. 799 */ 800 static __be32 801 nfsd3_proc_commit(struct svc_rqst *rqstp) 802 { 803 struct nfsd3_commitargs *argp = rqstp->rq_argp; 804 struct nfsd3_commitres *resp = rqstp->rq_resp; 805 struct nfsd_file *nf; 806 807 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 808 SVCFH_fmt(&argp->fh), 809 argp->count, 810 (unsigned long long) argp->offset); 811 812 fh_copy(&resp->fh, &argp->fh); 813 resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | 814 NFSD_MAY_NOT_BREAK_LEASE, &nf); 815 if (resp->status) 816 goto out; 817 resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, 818 argp->count, resp->verf); 819 nfsd_file_put(nf); 820 out: 821 resp->status = nfsd3_map_status(resp->status); 822 return rpc_success; 823 } 824 825 826 /* 827 * NFSv3 Server procedures. 828 * Only the results of non-idempotent operations are cached. 829 */ 830 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 831 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 832 #define nfsd3_mkdirargs nfsd3_createargs 833 #define nfsd3_readdirplusargs nfsd3_readdirargs 834 #define nfsd3_fhandleargs nfsd_fhandle 835 #define nfsd3_attrstatres nfsd3_attrstat 836 #define nfsd3_wccstatres nfsd3_attrstat 837 #define nfsd3_createres nfsd3_diropres 838 839 #define ST 1 /* status*/ 840 #define FH 17 /* filehandle with length */ 841 #define AT 21 /* attributes */ 842 #define pAT (1+AT) /* post attributes - conditional */ 843 #define WC (7+pAT) /* WCC attributes */ 844 845 static const struct svc_procedure nfsd_procedures3[22] = { 846 [NFS3PROC_NULL] = { 847 .pc_func = nfsd3_proc_null, 848 .pc_decode = nfssvc_decode_voidarg, 849 .pc_encode = nfssvc_encode_voidres, 850 .pc_argsize = sizeof(struct nfsd_voidargs), 851 .pc_argzero = sizeof(struct nfsd_voidargs), 852 .pc_ressize = sizeof(struct nfsd_voidres), 853 .pc_cachetype = RC_NOCACHE, 854 .pc_xdrressize = ST, 855 .pc_name = "NULL", 856 }, 857 [NFS3PROC_GETATTR] = { 858 .pc_func = nfsd3_proc_getattr, 859 .pc_decode = nfs3svc_decode_fhandleargs, 860 .pc_encode = nfs3svc_encode_getattrres, 861 .pc_release = nfs3svc_release_fhandle, 862 .pc_argsize = sizeof(struct nfsd_fhandle), 863 .pc_argzero = sizeof(struct nfsd_fhandle), 864 .pc_ressize = sizeof(struct nfsd3_attrstatres), 865 .pc_cachetype = RC_NOCACHE, 866 .pc_xdrressize = ST+AT, 867 .pc_name = "GETATTR", 868 }, 869 [NFS3PROC_SETATTR] = { 870 .pc_func = nfsd3_proc_setattr, 871 .pc_decode = nfs3svc_decode_sattrargs, 872 .pc_encode = nfs3svc_encode_wccstatres, 873 .pc_release = nfs3svc_release_fhandle, 874 .pc_argsize = sizeof(struct nfsd3_sattrargs), 875 .pc_argzero = sizeof(struct nfsd3_sattrargs), 876 .pc_ressize = sizeof(struct nfsd3_wccstatres), 877 .pc_cachetype = RC_REPLBUFF, 878 .pc_xdrressize = ST+WC, 879 .pc_name = "SETATTR", 880 }, 881 [NFS3PROC_LOOKUP] = { 882 .pc_func = nfsd3_proc_lookup, 883 .pc_decode = nfs3svc_decode_diropargs, 884 .pc_encode = nfs3svc_encode_lookupres, 885 .pc_release = nfs3svc_release_fhandle2, 886 .pc_argsize = sizeof(struct nfsd3_diropargs), 887 .pc_argzero = sizeof(struct nfsd3_diropargs), 888 .pc_ressize = sizeof(struct nfsd3_diropres), 889 .pc_cachetype = RC_NOCACHE, 890 .pc_xdrressize = ST+FH+pAT+pAT, 891 .pc_name = "LOOKUP", 892 }, 893 [NFS3PROC_ACCESS] = { 894 .pc_func = nfsd3_proc_access, 895 .pc_decode = nfs3svc_decode_accessargs, 896 .pc_encode = nfs3svc_encode_accessres, 897 .pc_release = nfs3svc_release_fhandle, 898 .pc_argsize = sizeof(struct nfsd3_accessargs), 899 .pc_argzero = sizeof(struct nfsd3_accessargs), 900 .pc_ressize = sizeof(struct nfsd3_accessres), 901 .pc_cachetype = RC_NOCACHE, 902 .pc_xdrressize = ST+pAT+1, 903 .pc_name = "ACCESS", 904 }, 905 [NFS3PROC_READLINK] = { 906 .pc_func = nfsd3_proc_readlink, 907 .pc_decode = nfs3svc_decode_fhandleargs, 908 .pc_encode = nfs3svc_encode_readlinkres, 909 .pc_release = nfs3svc_release_fhandle, 910 .pc_argsize = sizeof(struct nfsd_fhandle), 911 .pc_argzero = sizeof(struct nfsd_fhandle), 912 .pc_ressize = sizeof(struct nfsd3_readlinkres), 913 .pc_cachetype = RC_NOCACHE, 914 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 915 .pc_name = "READLINK", 916 }, 917 [NFS3PROC_READ] = { 918 .pc_func = nfsd3_proc_read, 919 .pc_decode = nfs3svc_decode_readargs, 920 .pc_encode = nfs3svc_encode_readres, 921 .pc_release = nfs3svc_release_fhandle, 922 .pc_argsize = sizeof(struct nfsd3_readargs), 923 .pc_argzero = sizeof(struct nfsd3_readargs), 924 .pc_ressize = sizeof(struct nfsd3_readres), 925 .pc_cachetype = RC_NOCACHE, 926 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 927 .pc_name = "READ", 928 }, 929 [NFS3PROC_WRITE] = { 930 .pc_func = nfsd3_proc_write, 931 .pc_decode = nfs3svc_decode_writeargs, 932 .pc_encode = nfs3svc_encode_writeres, 933 .pc_release = nfs3svc_release_fhandle, 934 .pc_argsize = sizeof(struct nfsd3_writeargs), 935 .pc_argzero = sizeof(struct nfsd3_writeargs), 936 .pc_ressize = sizeof(struct nfsd3_writeres), 937 .pc_cachetype = RC_REPLBUFF, 938 .pc_xdrressize = ST+WC+4, 939 .pc_name = "WRITE", 940 }, 941 [NFS3PROC_CREATE] = { 942 .pc_func = nfsd3_proc_create, 943 .pc_decode = nfs3svc_decode_createargs, 944 .pc_encode = nfs3svc_encode_createres, 945 .pc_release = nfs3svc_release_fhandle2, 946 .pc_argsize = sizeof(struct nfsd3_createargs), 947 .pc_argzero = sizeof(struct nfsd3_createargs), 948 .pc_ressize = sizeof(struct nfsd3_createres), 949 .pc_cachetype = RC_REPLBUFF, 950 .pc_xdrressize = ST+(1+FH+pAT)+WC, 951 .pc_name = "CREATE", 952 }, 953 [NFS3PROC_MKDIR] = { 954 .pc_func = nfsd3_proc_mkdir, 955 .pc_decode = nfs3svc_decode_mkdirargs, 956 .pc_encode = nfs3svc_encode_createres, 957 .pc_release = nfs3svc_release_fhandle2, 958 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 959 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 960 .pc_ressize = sizeof(struct nfsd3_createres), 961 .pc_cachetype = RC_REPLBUFF, 962 .pc_xdrressize = ST+(1+FH+pAT)+WC, 963 .pc_name = "MKDIR", 964 }, 965 [NFS3PROC_SYMLINK] = { 966 .pc_func = nfsd3_proc_symlink, 967 .pc_decode = nfs3svc_decode_symlinkargs, 968 .pc_encode = nfs3svc_encode_createres, 969 .pc_release = nfs3svc_release_fhandle2, 970 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 971 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 972 .pc_ressize = sizeof(struct nfsd3_createres), 973 .pc_cachetype = RC_REPLBUFF, 974 .pc_xdrressize = ST+(1+FH+pAT)+WC, 975 .pc_name = "SYMLINK", 976 }, 977 [NFS3PROC_MKNOD] = { 978 .pc_func = nfsd3_proc_mknod, 979 .pc_decode = nfs3svc_decode_mknodargs, 980 .pc_encode = nfs3svc_encode_createres, 981 .pc_release = nfs3svc_release_fhandle2, 982 .pc_argsize = sizeof(struct nfsd3_mknodargs), 983 .pc_argzero = sizeof(struct nfsd3_mknodargs), 984 .pc_ressize = sizeof(struct nfsd3_createres), 985 .pc_cachetype = RC_REPLBUFF, 986 .pc_xdrressize = ST+(1+FH+pAT)+WC, 987 .pc_name = "MKNOD", 988 }, 989 [NFS3PROC_REMOVE] = { 990 .pc_func = nfsd3_proc_remove, 991 .pc_decode = nfs3svc_decode_diropargs, 992 .pc_encode = nfs3svc_encode_wccstatres, 993 .pc_release = nfs3svc_release_fhandle, 994 .pc_argsize = sizeof(struct nfsd3_diropargs), 995 .pc_argzero = sizeof(struct nfsd3_diropargs), 996 .pc_ressize = sizeof(struct nfsd3_wccstatres), 997 .pc_cachetype = RC_REPLBUFF, 998 .pc_xdrressize = ST+WC, 999 .pc_name = "REMOVE", 1000 }, 1001 [NFS3PROC_RMDIR] = { 1002 .pc_func = nfsd3_proc_rmdir, 1003 .pc_decode = nfs3svc_decode_diropargs, 1004 .pc_encode = nfs3svc_encode_wccstatres, 1005 .pc_release = nfs3svc_release_fhandle, 1006 .pc_argsize = sizeof(struct nfsd3_diropargs), 1007 .pc_argzero = sizeof(struct nfsd3_diropargs), 1008 .pc_ressize = sizeof(struct nfsd3_wccstatres), 1009 .pc_cachetype = RC_REPLBUFF, 1010 .pc_xdrressize = ST+WC, 1011 .pc_name = "RMDIR", 1012 }, 1013 [NFS3PROC_RENAME] = { 1014 .pc_func = nfsd3_proc_rename, 1015 .pc_decode = nfs3svc_decode_renameargs, 1016 .pc_encode = nfs3svc_encode_renameres, 1017 .pc_release = nfs3svc_release_fhandle2, 1018 .pc_argsize = sizeof(struct nfsd3_renameargs), 1019 .pc_argzero = sizeof(struct nfsd3_renameargs), 1020 .pc_ressize = sizeof(struct nfsd3_renameres), 1021 .pc_cachetype = RC_REPLBUFF, 1022 .pc_xdrressize = ST+WC+WC, 1023 .pc_name = "RENAME", 1024 }, 1025 [NFS3PROC_LINK] = { 1026 .pc_func = nfsd3_proc_link, 1027 .pc_decode = nfs3svc_decode_linkargs, 1028 .pc_encode = nfs3svc_encode_linkres, 1029 .pc_release = nfs3svc_release_fhandle2, 1030 .pc_argsize = sizeof(struct nfsd3_linkargs), 1031 .pc_argzero = sizeof(struct nfsd3_linkargs), 1032 .pc_ressize = sizeof(struct nfsd3_linkres), 1033 .pc_cachetype = RC_REPLBUFF, 1034 .pc_xdrressize = ST+pAT+WC, 1035 .pc_name = "LINK", 1036 }, 1037 [NFS3PROC_READDIR] = { 1038 .pc_func = nfsd3_proc_readdir, 1039 .pc_decode = nfs3svc_decode_readdirargs, 1040 .pc_encode = nfs3svc_encode_readdirres, 1041 .pc_release = nfs3svc_release_fhandle, 1042 .pc_argsize = sizeof(struct nfsd3_readdirargs), 1043 .pc_argzero = sizeof(struct nfsd3_readdirargs), 1044 .pc_ressize = sizeof(struct nfsd3_readdirres), 1045 .pc_cachetype = RC_NOCACHE, 1046 .pc_name = "READDIR", 1047 }, 1048 [NFS3PROC_READDIRPLUS] = { 1049 .pc_func = nfsd3_proc_readdirplus, 1050 .pc_decode = nfs3svc_decode_readdirplusargs, 1051 .pc_encode = nfs3svc_encode_readdirres, 1052 .pc_release = nfs3svc_release_fhandle, 1053 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 1054 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 1055 .pc_ressize = sizeof(struct nfsd3_readdirres), 1056 .pc_cachetype = RC_NOCACHE, 1057 .pc_name = "READDIRPLUS", 1058 }, 1059 [NFS3PROC_FSSTAT] = { 1060 .pc_func = nfsd3_proc_fsstat, 1061 .pc_decode = nfs3svc_decode_fhandleargs, 1062 .pc_encode = nfs3svc_encode_fsstatres, 1063 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1064 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1065 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1066 .pc_cachetype = RC_NOCACHE, 1067 .pc_xdrressize = ST+pAT+2*6+1, 1068 .pc_name = "FSSTAT", 1069 }, 1070 [NFS3PROC_FSINFO] = { 1071 .pc_func = nfsd3_proc_fsinfo, 1072 .pc_decode = nfs3svc_decode_fhandleargs, 1073 .pc_encode = nfs3svc_encode_fsinfores, 1074 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1075 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1076 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1077 .pc_cachetype = RC_NOCACHE, 1078 .pc_xdrressize = ST+pAT+12, 1079 .pc_name = "FSINFO", 1080 }, 1081 [NFS3PROC_PATHCONF] = { 1082 .pc_func = nfsd3_proc_pathconf, 1083 .pc_decode = nfs3svc_decode_fhandleargs, 1084 .pc_encode = nfs3svc_encode_pathconfres, 1085 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1086 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1087 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1088 .pc_cachetype = RC_NOCACHE, 1089 .pc_xdrressize = ST+pAT+6, 1090 .pc_name = "PATHCONF", 1091 }, 1092 [NFS3PROC_COMMIT] = { 1093 .pc_func = nfsd3_proc_commit, 1094 .pc_decode = nfs3svc_decode_commitargs, 1095 .pc_encode = nfs3svc_encode_commitres, 1096 .pc_release = nfs3svc_release_fhandle, 1097 .pc_argsize = sizeof(struct nfsd3_commitargs), 1098 .pc_argzero = sizeof(struct nfsd3_commitargs), 1099 .pc_ressize = sizeof(struct nfsd3_commitres), 1100 .pc_cachetype = RC_NOCACHE, 1101 .pc_xdrressize = ST+WC+2, 1102 .pc_name = "COMMIT", 1103 }, 1104 }; 1105 1106 static DEFINE_PER_CPU_ALIGNED(unsigned long, 1107 nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]); 1108 const struct svc_version nfsd_version3 = { 1109 .vs_vers = 3, 1110 .vs_nproc = ARRAY_SIZE(nfsd_procedures3), 1111 .vs_proc = nfsd_procedures3, 1112 .vs_dispatch = nfsd_dispatch, 1113 .vs_count = nfsd_count3, 1114 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1115 }; 1116