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 17 #define NFSDDBG_FACILITY NFSDDBG_PROC 18 19 static int nfs3_ftypes[] = { 20 0, /* NF3NON */ 21 S_IFREG, /* NF3REG */ 22 S_IFDIR, /* NF3DIR */ 23 S_IFBLK, /* NF3BLK */ 24 S_IFCHR, /* NF3CHR */ 25 S_IFLNK, /* NF3LNK */ 26 S_IFSOCK, /* NF3SOCK */ 27 S_IFIFO, /* NF3FIFO */ 28 }; 29 30 /* 31 * NULL call. 32 */ 33 static __be32 34 nfsd3_proc_null(struct svc_rqst *rqstp) 35 { 36 return rpc_success; 37 } 38 39 /* 40 * Get a file's attributes 41 */ 42 static __be32 43 nfsd3_proc_getattr(struct svc_rqst *rqstp) 44 { 45 struct nfsd_fhandle *argp = rqstp->rq_argp; 46 struct nfsd3_attrstat *resp = rqstp->rq_resp; 47 48 dprintk("nfsd: GETATTR(3) %s\n", 49 SVCFH_fmt(&argp->fh)); 50 51 fh_copy(&resp->fh, &argp->fh); 52 resp->status = fh_verify(rqstp, &resp->fh, 0, 53 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 54 if (resp->status != nfs_ok) 55 goto out; 56 57 resp->status = fh_getattr(&resp->fh, &resp->stat); 58 out: 59 return rpc_success; 60 } 61 62 /* 63 * Set a file's attributes 64 */ 65 static __be32 66 nfsd3_proc_setattr(struct svc_rqst *rqstp) 67 { 68 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 69 struct nfsd3_attrstat *resp = rqstp->rq_resp; 70 struct nfsd_attrs attrs = { 71 .na_iattr = &argp->attrs, 72 }; 73 74 dprintk("nfsd: SETATTR(3) %s\n", 75 SVCFH_fmt(&argp->fh)); 76 77 fh_copy(&resp->fh, &argp->fh); 78 resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs, 79 argp->check_guard, argp->guardtime); 80 return rpc_success; 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 92 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 93 SVCFH_fmt(&argp->fh), 94 argp->len, 95 argp->name); 96 97 fh_copy(&resp->dirfh, &argp->fh); 98 fh_init(&resp->fh, NFS3_FHSIZE); 99 100 resp->status = nfsd_lookup(rqstp, &resp->dirfh, 101 argp->name, argp->len, 102 &resp->fh); 103 return rpc_success; 104 } 105 106 /* 107 * Check file access 108 */ 109 static __be32 110 nfsd3_proc_access(struct svc_rqst *rqstp) 111 { 112 struct nfsd3_accessargs *argp = rqstp->rq_argp; 113 struct nfsd3_accessres *resp = rqstp->rq_resp; 114 115 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 116 SVCFH_fmt(&argp->fh), 117 argp->access); 118 119 fh_copy(&resp->fh, &argp->fh); 120 resp->access = argp->access; 121 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 122 return rpc_success; 123 } 124 125 /* 126 * Read a symlink. 127 */ 128 static __be32 129 nfsd3_proc_readlink(struct svc_rqst *rqstp) 130 { 131 struct nfsd_fhandle *argp = rqstp->rq_argp; 132 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 133 134 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 135 136 /* Read the symlink. */ 137 fh_copy(&resp->fh, &argp->fh); 138 resp->len = NFS3_MAXPATHLEN; 139 resp->pages = rqstp->rq_next_page++; 140 resp->status = nfsd_readlink(rqstp, &resp->fh, 141 page_address(*resp->pages), &resp->len); 142 return rpc_success; 143 } 144 145 /* 146 * Read a portion of a file. 147 */ 148 static __be32 149 nfsd3_proc_read(struct svc_rqst *rqstp) 150 { 151 struct nfsd3_readargs *argp = rqstp->rq_argp; 152 struct nfsd3_readres *resp = rqstp->rq_resp; 153 unsigned int len; 154 int v; 155 156 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 157 SVCFH_fmt(&argp->fh), 158 (unsigned long) argp->count, 159 (unsigned long long) argp->offset); 160 161 argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); 162 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 163 if (argp->offset > (u64)OFFSET_MAX) 164 argp->offset = (u64)OFFSET_MAX; 165 if (argp->offset + argp->count > (u64)OFFSET_MAX) 166 argp->count = (u64)OFFSET_MAX - argp->offset; 167 168 v = 0; 169 len = argp->count; 170 resp->pages = rqstp->rq_next_page; 171 while (len > 0) { 172 struct page *page = *(rqstp->rq_next_page++); 173 174 rqstp->rq_vec[v].iov_base = page_address(page); 175 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE); 176 len -= rqstp->rq_vec[v].iov_len; 177 v++; 178 } 179 180 /* Obtain buffer pointer for payload. 181 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 182 * + 1 (xdr opaque byte count) = 26 183 */ 184 resp->count = argp->count; 185 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); 186 187 fh_copy(&resp->fh, &argp->fh); 188 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 189 rqstp->rq_vec, v, &resp->count, &resp->eof); 190 return rpc_success; 191 } 192 193 /* 194 * Write data to a file 195 */ 196 static __be32 197 nfsd3_proc_write(struct svc_rqst *rqstp) 198 { 199 struct nfsd3_writeargs *argp = rqstp->rq_argp; 200 struct nfsd3_writeres *resp = rqstp->rq_resp; 201 unsigned long cnt = argp->len; 202 unsigned int nvecs; 203 204 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 205 SVCFH_fmt(&argp->fh), 206 argp->len, 207 (unsigned long long) argp->offset, 208 argp->stable? " stable" : ""); 209 210 resp->status = nfserr_fbig; 211 if (argp->offset > (u64)OFFSET_MAX || 212 argp->offset + argp->len > (u64)OFFSET_MAX) 213 return rpc_success; 214 215 fh_copy(&resp->fh, &argp->fh); 216 resp->committed = argp->stable; 217 nvecs = svc_fill_write_vector(rqstp, &argp->payload); 218 219 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 220 rqstp->rq_vec, nvecs, &cnt, 221 resp->committed, resp->verf); 222 resp->count = cnt; 223 return rpc_success; 224 } 225 226 /* 227 * Implement NFSv3's unchecked, guarded, and exclusive CREATE 228 * semantics for regular files. Except for the created file, 229 * this operation is stateless on the server. 230 * 231 * Upon return, caller must release @fhp and @resfhp. 232 */ 233 static __be32 234 nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 235 struct svc_fh *resfhp, struct nfsd3_createargs *argp) 236 { 237 struct iattr *iap = &argp->attrs; 238 struct dentry *parent, *child; 239 struct nfsd_attrs attrs = { 240 .na_iattr = iap, 241 }; 242 __u32 v_mtime, v_atime; 243 struct inode *inode; 244 __be32 status; 245 int host_err; 246 247 if (isdotent(argp->name, argp->len)) 248 return nfserr_exist; 249 if (!(iap->ia_valid & ATTR_MODE)) 250 iap->ia_mode = 0; 251 252 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 253 if (status != nfs_ok) 254 return status; 255 256 parent = fhp->fh_dentry; 257 inode = d_inode(parent); 258 259 host_err = fh_want_write(fhp); 260 if (host_err) 261 return nfserrno(host_err); 262 263 inode_lock_nested(inode, I_MUTEX_PARENT); 264 265 child = lookup_one_len(argp->name, parent, argp->len); 266 if (IS_ERR(child)) { 267 status = nfserrno(PTR_ERR(child)); 268 goto out; 269 } 270 271 if (d_really_is_negative(child)) { 272 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 273 if (status != nfs_ok) 274 goto out; 275 } 276 277 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 278 if (status != nfs_ok) 279 goto out; 280 281 v_mtime = 0; 282 v_atime = 0; 283 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 284 u32 *verifier = (u32 *)argp->verf; 285 286 /* 287 * Solaris 7 gets confused (bugid 4218508) if these have 288 * the high bit set, as do xfs filesystems without the 289 * "bigtime" feature. So just clear the high bits. 290 */ 291 v_mtime = verifier[0] & 0x7fffffff; 292 v_atime = verifier[1] & 0x7fffffff; 293 } 294 295 if (d_really_is_positive(child)) { 296 status = nfs_ok; 297 298 switch (argp->createmode) { 299 case NFS3_CREATE_UNCHECKED: 300 if (!d_is_reg(child)) 301 break; 302 iap->ia_valid &= ATTR_SIZE; 303 goto set_attr; 304 case NFS3_CREATE_GUARDED: 305 status = nfserr_exist; 306 break; 307 case NFS3_CREATE_EXCLUSIVE: 308 if (d_inode(child)->i_mtime.tv_sec == v_mtime && 309 d_inode(child)->i_atime.tv_sec == v_atime && 310 d_inode(child)->i_size == 0) { 311 break; 312 } 313 status = nfserr_exist; 314 } 315 goto out; 316 } 317 318 if (!IS_POSIXACL(inode)) 319 iap->ia_mode &= ~current_umask(); 320 321 fh_fill_pre_attrs(fhp); 322 host_err = vfs_create(&init_user_ns, inode, child, iap->ia_mode, true); 323 if (host_err < 0) { 324 status = nfserrno(host_err); 325 goto out; 326 } 327 fh_fill_post_attrs(fhp); 328 329 /* A newly created file already has a file size of zero. */ 330 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 331 iap->ia_valid &= ~ATTR_SIZE; 332 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 333 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 334 ATTR_MTIME_SET | ATTR_ATIME_SET; 335 iap->ia_mtime.tv_sec = v_mtime; 336 iap->ia_atime.tv_sec = v_atime; 337 iap->ia_mtime.tv_nsec = 0; 338 iap->ia_atime.tv_nsec = 0; 339 } 340 341 set_attr: 342 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 343 344 out: 345 inode_unlock(inode); 346 if (child && !IS_ERR(child)) 347 dput(child); 348 fh_drop_write(fhp); 349 return status; 350 } 351 352 static __be32 353 nfsd3_proc_create(struct svc_rqst *rqstp) 354 { 355 struct nfsd3_createargs *argp = rqstp->rq_argp; 356 struct nfsd3_diropres *resp = rqstp->rq_resp; 357 svc_fh *dirfhp, *newfhp; 358 359 dprintk("nfsd: CREATE(3) %s %.*s\n", 360 SVCFH_fmt(&argp->fh), 361 argp->len, 362 argp->name); 363 364 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 365 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 366 367 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 368 return rpc_success; 369 } 370 371 /* 372 * Make directory. This operation is not idempotent. 373 */ 374 static __be32 375 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 376 { 377 struct nfsd3_createargs *argp = rqstp->rq_argp; 378 struct nfsd3_diropres *resp = rqstp->rq_resp; 379 struct nfsd_attrs attrs = { 380 .na_iattr = &argp->attrs, 381 }; 382 383 dprintk("nfsd: MKDIR(3) %s %.*s\n", 384 SVCFH_fmt(&argp->fh), 385 argp->len, 386 argp->name); 387 388 argp->attrs.ia_valid &= ~ATTR_SIZE; 389 fh_copy(&resp->dirfh, &argp->fh); 390 fh_init(&resp->fh, NFS3_FHSIZE); 391 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 392 &attrs, S_IFDIR, 0, &resp->fh); 393 return rpc_success; 394 } 395 396 static __be32 397 nfsd3_proc_symlink(struct svc_rqst *rqstp) 398 { 399 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 400 struct nfsd3_diropres *resp = rqstp->rq_resp; 401 struct nfsd_attrs attrs = { 402 .na_iattr = &argp->attrs, 403 }; 404 405 if (argp->tlen == 0) { 406 resp->status = nfserr_inval; 407 goto out; 408 } 409 if (argp->tlen > NFS3_MAXPATHLEN) { 410 resp->status = nfserr_nametoolong; 411 goto out; 412 } 413 414 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 415 page_address(rqstp->rq_arg.pages[0]), 416 argp->tlen); 417 if (IS_ERR(argp->tname)) { 418 resp->status = nfserrno(PTR_ERR(argp->tname)); 419 goto out; 420 } 421 422 dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n", 423 SVCFH_fmt(&argp->ffh), 424 argp->flen, argp->fname, 425 argp->tlen, argp->tname); 426 427 fh_copy(&resp->dirfh, &argp->ffh); 428 fh_init(&resp->fh, NFS3_FHSIZE); 429 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 430 argp->flen, argp->tname, &attrs, &resp->fh); 431 kfree(argp->tname); 432 out: 433 return rpc_success; 434 } 435 436 /* 437 * Make socket/fifo/device. 438 */ 439 static __be32 440 nfsd3_proc_mknod(struct svc_rqst *rqstp) 441 { 442 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 443 struct nfsd3_diropres *resp = rqstp->rq_resp; 444 struct nfsd_attrs attrs = { 445 .na_iattr = &argp->attrs, 446 }; 447 int type; 448 dev_t rdev = 0; 449 450 dprintk("nfsd: MKNOD(3) %s %.*s\n", 451 SVCFH_fmt(&argp->fh), 452 argp->len, 453 argp->name); 454 455 fh_copy(&resp->dirfh, &argp->fh); 456 fh_init(&resp->fh, NFS3_FHSIZE); 457 458 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 459 rdev = MKDEV(argp->major, argp->minor); 460 if (MAJOR(rdev) != argp->major || 461 MINOR(rdev) != argp->minor) { 462 resp->status = nfserr_inval; 463 goto out; 464 } 465 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 466 resp->status = nfserr_badtype; 467 goto out; 468 } 469 470 type = nfs3_ftypes[argp->ftype]; 471 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 472 &attrs, type, rdev, &resp->fh); 473 out: 474 return rpc_success; 475 } 476 477 /* 478 * Remove file/fifo/socket etc. 479 */ 480 static __be32 481 nfsd3_proc_remove(struct svc_rqst *rqstp) 482 { 483 struct nfsd3_diropargs *argp = rqstp->rq_argp; 484 struct nfsd3_attrstat *resp = rqstp->rq_resp; 485 486 dprintk("nfsd: REMOVE(3) %s %.*s\n", 487 SVCFH_fmt(&argp->fh), 488 argp->len, 489 argp->name); 490 491 /* Unlink. -S_IFDIR means file must not be a directory */ 492 fh_copy(&resp->fh, &argp->fh); 493 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 494 argp->name, argp->len); 495 return rpc_success; 496 } 497 498 /* 499 * Remove a directory 500 */ 501 static __be32 502 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 503 { 504 struct nfsd3_diropargs *argp = rqstp->rq_argp; 505 struct nfsd3_attrstat *resp = rqstp->rq_resp; 506 507 dprintk("nfsd: RMDIR(3) %s %.*s\n", 508 SVCFH_fmt(&argp->fh), 509 argp->len, 510 argp->name); 511 512 fh_copy(&resp->fh, &argp->fh); 513 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 514 argp->name, argp->len); 515 return rpc_success; 516 } 517 518 static __be32 519 nfsd3_proc_rename(struct svc_rqst *rqstp) 520 { 521 struct nfsd3_renameargs *argp = rqstp->rq_argp; 522 struct nfsd3_renameres *resp = rqstp->rq_resp; 523 524 dprintk("nfsd: RENAME(3) %s %.*s ->\n", 525 SVCFH_fmt(&argp->ffh), 526 argp->flen, 527 argp->fname); 528 dprintk("nfsd: -> %s %.*s\n", 529 SVCFH_fmt(&argp->tfh), 530 argp->tlen, 531 argp->tname); 532 533 fh_copy(&resp->ffh, &argp->ffh); 534 fh_copy(&resp->tfh, &argp->tfh); 535 resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen, 536 &resp->tfh, argp->tname, argp->tlen); 537 return rpc_success; 538 } 539 540 static __be32 541 nfsd3_proc_link(struct svc_rqst *rqstp) 542 { 543 struct nfsd3_linkargs *argp = rqstp->rq_argp; 544 struct nfsd3_linkres *resp = rqstp->rq_resp; 545 546 dprintk("nfsd: LINK(3) %s ->\n", 547 SVCFH_fmt(&argp->ffh)); 548 dprintk("nfsd: -> %s %.*s\n", 549 SVCFH_fmt(&argp->tfh), 550 argp->tlen, 551 argp->tname); 552 553 fh_copy(&resp->fh, &argp->ffh); 554 fh_copy(&resp->tfh, &argp->tfh); 555 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 556 &resp->fh); 557 return rpc_success; 558 } 559 560 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 561 struct nfsd3_readdirres *resp, 562 u32 count) 563 { 564 struct xdr_buf *buf = &resp->dirlist; 565 struct xdr_stream *xdr = &resp->xdr; 566 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 567 svc_max_payload(rqstp)); 568 569 memset(buf, 0, sizeof(*buf)); 570 571 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 572 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 573 buf->buflen -= XDR_UNIT * 2; 574 buf->pages = rqstp->rq_next_page; 575 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 576 577 xdr_init_encode_pages(xdr, buf, buf->pages, NULL); 578 } 579 580 /* 581 * Read a portion of a directory. 582 */ 583 static __be32 584 nfsd3_proc_readdir(struct svc_rqst *rqstp) 585 { 586 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 587 struct nfsd3_readdirres *resp = rqstp->rq_resp; 588 loff_t offset; 589 590 dprintk("nfsd: READDIR(3) %s %d bytes at %d\n", 591 SVCFH_fmt(&argp->fh), 592 argp->count, (u32) argp->cookie); 593 594 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 595 596 fh_copy(&resp->fh, &argp->fh); 597 resp->common.err = nfs_ok; 598 resp->cookie_offset = 0; 599 resp->rqstp = rqstp; 600 offset = argp->cookie; 601 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 602 &resp->common, nfs3svc_encode_entry3); 603 memcpy(resp->verf, argp->verf, 8); 604 nfs3svc_encode_cookie3(resp, offset); 605 606 /* Recycle only pages that were part of the reply */ 607 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 608 609 return rpc_success; 610 } 611 612 /* 613 * Read a portion of a directory, including file handles and attrs. 614 * For now, we choose to ignore the dircount parameter. 615 */ 616 static __be32 617 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 618 { 619 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 620 struct nfsd3_readdirres *resp = rqstp->rq_resp; 621 loff_t offset; 622 623 dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n", 624 SVCFH_fmt(&argp->fh), 625 argp->count, (u32) argp->cookie); 626 627 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 628 629 fh_copy(&resp->fh, &argp->fh); 630 resp->common.err = nfs_ok; 631 resp->cookie_offset = 0; 632 resp->rqstp = rqstp; 633 offset = argp->cookie; 634 635 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 636 if (resp->status != nfs_ok) 637 goto out; 638 639 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 640 resp->status = nfserr_notsupp; 641 goto out; 642 } 643 644 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 645 &resp->common, nfs3svc_encode_entryplus3); 646 memcpy(resp->verf, argp->verf, 8); 647 nfs3svc_encode_cookie3(resp, offset); 648 649 /* Recycle only pages that were part of the reply */ 650 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 651 652 out: 653 return rpc_success; 654 } 655 656 /* 657 * Get file system stats 658 */ 659 static __be32 660 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 661 { 662 struct nfsd_fhandle *argp = rqstp->rq_argp; 663 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 664 665 dprintk("nfsd: FSSTAT(3) %s\n", 666 SVCFH_fmt(&argp->fh)); 667 668 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 669 fh_put(&argp->fh); 670 return rpc_success; 671 } 672 673 /* 674 * Get file system info 675 */ 676 static __be32 677 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 678 { 679 struct nfsd_fhandle *argp = rqstp->rq_argp; 680 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 681 u32 max_blocksize = svc_max_payload(rqstp); 682 683 dprintk("nfsd: FSINFO(3) %s\n", 684 SVCFH_fmt(&argp->fh)); 685 686 resp->f_rtmax = max_blocksize; 687 resp->f_rtpref = max_blocksize; 688 resp->f_rtmult = PAGE_SIZE; 689 resp->f_wtmax = max_blocksize; 690 resp->f_wtpref = max_blocksize; 691 resp->f_wtmult = PAGE_SIZE; 692 resp->f_dtpref = max_blocksize; 693 resp->f_maxfilesize = ~(u32) 0; 694 resp->f_properties = NFS3_FSF_DEFAULT; 695 696 resp->status = fh_verify(rqstp, &argp->fh, 0, 697 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 698 699 /* Check special features of the file system. May request 700 * different read/write sizes for file systems known to have 701 * problems with large blocks */ 702 if (resp->status == nfs_ok) { 703 struct super_block *sb = argp->fh.fh_dentry->d_sb; 704 705 /* Note that we don't care for remote fs's here */ 706 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 707 resp->f_properties = NFS3_FSF_BILLYBOY; 708 } 709 resp->f_maxfilesize = sb->s_maxbytes; 710 } 711 712 fh_put(&argp->fh); 713 return rpc_success; 714 } 715 716 /* 717 * Get pathconf info for the specified file 718 */ 719 static __be32 720 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 721 { 722 struct nfsd_fhandle *argp = rqstp->rq_argp; 723 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 724 725 dprintk("nfsd: PATHCONF(3) %s\n", 726 SVCFH_fmt(&argp->fh)); 727 728 /* Set default pathconf */ 729 resp->p_link_max = 255; /* at least */ 730 resp->p_name_max = 255; /* at least */ 731 resp->p_no_trunc = 0; 732 resp->p_chown_restricted = 1; 733 resp->p_case_insensitive = 0; 734 resp->p_case_preserving = 1; 735 736 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 737 738 if (resp->status == nfs_ok) { 739 struct super_block *sb = argp->fh.fh_dentry->d_sb; 740 741 /* Note that we don't care for remote fs's here */ 742 switch (sb->s_magic) { 743 case EXT2_SUPER_MAGIC: 744 resp->p_link_max = EXT2_LINK_MAX; 745 resp->p_name_max = EXT2_NAME_LEN; 746 break; 747 case MSDOS_SUPER_MAGIC: 748 resp->p_case_insensitive = 1; 749 resp->p_case_preserving = 0; 750 break; 751 } 752 } 753 754 fh_put(&argp->fh); 755 return rpc_success; 756 } 757 758 /* 759 * Commit a file (range) to stable storage. 760 */ 761 static __be32 762 nfsd3_proc_commit(struct svc_rqst *rqstp) 763 { 764 struct nfsd3_commitargs *argp = rqstp->rq_argp; 765 struct nfsd3_commitres *resp = rqstp->rq_resp; 766 767 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 768 SVCFH_fmt(&argp->fh), 769 argp->count, 770 (unsigned long long) argp->offset); 771 772 fh_copy(&resp->fh, &argp->fh); 773 resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset, 774 argp->count, resp->verf); 775 return rpc_success; 776 } 777 778 779 /* 780 * NFSv3 Server procedures. 781 * Only the results of non-idempotent operations are cached. 782 */ 783 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 784 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 785 #define nfsd3_mkdirargs nfsd3_createargs 786 #define nfsd3_readdirplusargs nfsd3_readdirargs 787 #define nfsd3_fhandleargs nfsd_fhandle 788 #define nfsd3_attrstatres nfsd3_attrstat 789 #define nfsd3_wccstatres nfsd3_attrstat 790 #define nfsd3_createres nfsd3_diropres 791 792 #define ST 1 /* status*/ 793 #define FH 17 /* filehandle with length */ 794 #define AT 21 /* attributes */ 795 #define pAT (1+AT) /* post attributes - conditional */ 796 #define WC (7+pAT) /* WCC attributes */ 797 798 static const struct svc_procedure nfsd_procedures3[22] = { 799 [NFS3PROC_NULL] = { 800 .pc_func = nfsd3_proc_null, 801 .pc_decode = nfssvc_decode_voidarg, 802 .pc_encode = nfssvc_encode_voidres, 803 .pc_argsize = sizeof(struct nfsd_voidargs), 804 .pc_argzero = sizeof(struct nfsd_voidargs), 805 .pc_ressize = sizeof(struct nfsd_voidres), 806 .pc_cachetype = RC_NOCACHE, 807 .pc_xdrressize = ST, 808 .pc_name = "NULL", 809 }, 810 [NFS3PROC_GETATTR] = { 811 .pc_func = nfsd3_proc_getattr, 812 .pc_decode = nfs3svc_decode_fhandleargs, 813 .pc_encode = nfs3svc_encode_getattrres, 814 .pc_release = nfs3svc_release_fhandle, 815 .pc_argsize = sizeof(struct nfsd_fhandle), 816 .pc_argzero = sizeof(struct nfsd_fhandle), 817 .pc_ressize = sizeof(struct nfsd3_attrstatres), 818 .pc_cachetype = RC_NOCACHE, 819 .pc_xdrressize = ST+AT, 820 .pc_name = "GETATTR", 821 }, 822 [NFS3PROC_SETATTR] = { 823 .pc_func = nfsd3_proc_setattr, 824 .pc_decode = nfs3svc_decode_sattrargs, 825 .pc_encode = nfs3svc_encode_wccstatres, 826 .pc_release = nfs3svc_release_fhandle, 827 .pc_argsize = sizeof(struct nfsd3_sattrargs), 828 .pc_argzero = sizeof(struct nfsd3_sattrargs), 829 .pc_ressize = sizeof(struct nfsd3_wccstatres), 830 .pc_cachetype = RC_REPLBUFF, 831 .pc_xdrressize = ST+WC, 832 .pc_name = "SETATTR", 833 }, 834 [NFS3PROC_LOOKUP] = { 835 .pc_func = nfsd3_proc_lookup, 836 .pc_decode = nfs3svc_decode_diropargs, 837 .pc_encode = nfs3svc_encode_lookupres, 838 .pc_release = nfs3svc_release_fhandle2, 839 .pc_argsize = sizeof(struct nfsd3_diropargs), 840 .pc_argzero = sizeof(struct nfsd3_diropargs), 841 .pc_ressize = sizeof(struct nfsd3_diropres), 842 .pc_cachetype = RC_NOCACHE, 843 .pc_xdrressize = ST+FH+pAT+pAT, 844 .pc_name = "LOOKUP", 845 }, 846 [NFS3PROC_ACCESS] = { 847 .pc_func = nfsd3_proc_access, 848 .pc_decode = nfs3svc_decode_accessargs, 849 .pc_encode = nfs3svc_encode_accessres, 850 .pc_release = nfs3svc_release_fhandle, 851 .pc_argsize = sizeof(struct nfsd3_accessargs), 852 .pc_argzero = sizeof(struct nfsd3_accessargs), 853 .pc_ressize = sizeof(struct nfsd3_accessres), 854 .pc_cachetype = RC_NOCACHE, 855 .pc_xdrressize = ST+pAT+1, 856 .pc_name = "ACCESS", 857 }, 858 [NFS3PROC_READLINK] = { 859 .pc_func = nfsd3_proc_readlink, 860 .pc_decode = nfs3svc_decode_fhandleargs, 861 .pc_encode = nfs3svc_encode_readlinkres, 862 .pc_release = nfs3svc_release_fhandle, 863 .pc_argsize = sizeof(struct nfsd_fhandle), 864 .pc_argzero = sizeof(struct nfsd_fhandle), 865 .pc_ressize = sizeof(struct nfsd3_readlinkres), 866 .pc_cachetype = RC_NOCACHE, 867 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 868 .pc_name = "READLINK", 869 }, 870 [NFS3PROC_READ] = { 871 .pc_func = nfsd3_proc_read, 872 .pc_decode = nfs3svc_decode_readargs, 873 .pc_encode = nfs3svc_encode_readres, 874 .pc_release = nfs3svc_release_fhandle, 875 .pc_argsize = sizeof(struct nfsd3_readargs), 876 .pc_argzero = sizeof(struct nfsd3_readargs), 877 .pc_ressize = sizeof(struct nfsd3_readres), 878 .pc_cachetype = RC_NOCACHE, 879 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 880 .pc_name = "READ", 881 }, 882 [NFS3PROC_WRITE] = { 883 .pc_func = nfsd3_proc_write, 884 .pc_decode = nfs3svc_decode_writeargs, 885 .pc_encode = nfs3svc_encode_writeres, 886 .pc_release = nfs3svc_release_fhandle, 887 .pc_argsize = sizeof(struct nfsd3_writeargs), 888 .pc_argzero = sizeof(struct nfsd3_writeargs), 889 .pc_ressize = sizeof(struct nfsd3_writeres), 890 .pc_cachetype = RC_REPLBUFF, 891 .pc_xdrressize = ST+WC+4, 892 .pc_name = "WRITE", 893 }, 894 [NFS3PROC_CREATE] = { 895 .pc_func = nfsd3_proc_create, 896 .pc_decode = nfs3svc_decode_createargs, 897 .pc_encode = nfs3svc_encode_createres, 898 .pc_release = nfs3svc_release_fhandle2, 899 .pc_argsize = sizeof(struct nfsd3_createargs), 900 .pc_argzero = sizeof(struct nfsd3_createargs), 901 .pc_ressize = sizeof(struct nfsd3_createres), 902 .pc_cachetype = RC_REPLBUFF, 903 .pc_xdrressize = ST+(1+FH+pAT)+WC, 904 .pc_name = "CREATE", 905 }, 906 [NFS3PROC_MKDIR] = { 907 .pc_func = nfsd3_proc_mkdir, 908 .pc_decode = nfs3svc_decode_mkdirargs, 909 .pc_encode = nfs3svc_encode_createres, 910 .pc_release = nfs3svc_release_fhandle2, 911 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 912 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 913 .pc_ressize = sizeof(struct nfsd3_createres), 914 .pc_cachetype = RC_REPLBUFF, 915 .pc_xdrressize = ST+(1+FH+pAT)+WC, 916 .pc_name = "MKDIR", 917 }, 918 [NFS3PROC_SYMLINK] = { 919 .pc_func = nfsd3_proc_symlink, 920 .pc_decode = nfs3svc_decode_symlinkargs, 921 .pc_encode = nfs3svc_encode_createres, 922 .pc_release = nfs3svc_release_fhandle2, 923 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 924 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 925 .pc_ressize = sizeof(struct nfsd3_createres), 926 .pc_cachetype = RC_REPLBUFF, 927 .pc_xdrressize = ST+(1+FH+pAT)+WC, 928 .pc_name = "SYMLINK", 929 }, 930 [NFS3PROC_MKNOD] = { 931 .pc_func = nfsd3_proc_mknod, 932 .pc_decode = nfs3svc_decode_mknodargs, 933 .pc_encode = nfs3svc_encode_createres, 934 .pc_release = nfs3svc_release_fhandle2, 935 .pc_argsize = sizeof(struct nfsd3_mknodargs), 936 .pc_argzero = sizeof(struct nfsd3_mknodargs), 937 .pc_ressize = sizeof(struct nfsd3_createres), 938 .pc_cachetype = RC_REPLBUFF, 939 .pc_xdrressize = ST+(1+FH+pAT)+WC, 940 .pc_name = "MKNOD", 941 }, 942 [NFS3PROC_REMOVE] = { 943 .pc_func = nfsd3_proc_remove, 944 .pc_decode = nfs3svc_decode_diropargs, 945 .pc_encode = nfs3svc_encode_wccstatres, 946 .pc_release = nfs3svc_release_fhandle, 947 .pc_argsize = sizeof(struct nfsd3_diropargs), 948 .pc_argzero = sizeof(struct nfsd3_diropargs), 949 .pc_ressize = sizeof(struct nfsd3_wccstatres), 950 .pc_cachetype = RC_REPLBUFF, 951 .pc_xdrressize = ST+WC, 952 .pc_name = "REMOVE", 953 }, 954 [NFS3PROC_RMDIR] = { 955 .pc_func = nfsd3_proc_rmdir, 956 .pc_decode = nfs3svc_decode_diropargs, 957 .pc_encode = nfs3svc_encode_wccstatres, 958 .pc_release = nfs3svc_release_fhandle, 959 .pc_argsize = sizeof(struct nfsd3_diropargs), 960 .pc_argzero = sizeof(struct nfsd3_diropargs), 961 .pc_ressize = sizeof(struct nfsd3_wccstatres), 962 .pc_cachetype = RC_REPLBUFF, 963 .pc_xdrressize = ST+WC, 964 .pc_name = "RMDIR", 965 }, 966 [NFS3PROC_RENAME] = { 967 .pc_func = nfsd3_proc_rename, 968 .pc_decode = nfs3svc_decode_renameargs, 969 .pc_encode = nfs3svc_encode_renameres, 970 .pc_release = nfs3svc_release_fhandle2, 971 .pc_argsize = sizeof(struct nfsd3_renameargs), 972 .pc_argzero = sizeof(struct nfsd3_renameargs), 973 .pc_ressize = sizeof(struct nfsd3_renameres), 974 .pc_cachetype = RC_REPLBUFF, 975 .pc_xdrressize = ST+WC+WC, 976 .pc_name = "RENAME", 977 }, 978 [NFS3PROC_LINK] = { 979 .pc_func = nfsd3_proc_link, 980 .pc_decode = nfs3svc_decode_linkargs, 981 .pc_encode = nfs3svc_encode_linkres, 982 .pc_release = nfs3svc_release_fhandle2, 983 .pc_argsize = sizeof(struct nfsd3_linkargs), 984 .pc_argzero = sizeof(struct nfsd3_linkargs), 985 .pc_ressize = sizeof(struct nfsd3_linkres), 986 .pc_cachetype = RC_REPLBUFF, 987 .pc_xdrressize = ST+pAT+WC, 988 .pc_name = "LINK", 989 }, 990 [NFS3PROC_READDIR] = { 991 .pc_func = nfsd3_proc_readdir, 992 .pc_decode = nfs3svc_decode_readdirargs, 993 .pc_encode = nfs3svc_encode_readdirres, 994 .pc_release = nfs3svc_release_fhandle, 995 .pc_argsize = sizeof(struct nfsd3_readdirargs), 996 .pc_argzero = sizeof(struct nfsd3_readdirargs), 997 .pc_ressize = sizeof(struct nfsd3_readdirres), 998 .pc_cachetype = RC_NOCACHE, 999 .pc_name = "READDIR", 1000 }, 1001 [NFS3PROC_READDIRPLUS] = { 1002 .pc_func = nfsd3_proc_readdirplus, 1003 .pc_decode = nfs3svc_decode_readdirplusargs, 1004 .pc_encode = nfs3svc_encode_readdirres, 1005 .pc_release = nfs3svc_release_fhandle, 1006 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 1007 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 1008 .pc_ressize = sizeof(struct nfsd3_readdirres), 1009 .pc_cachetype = RC_NOCACHE, 1010 .pc_name = "READDIRPLUS", 1011 }, 1012 [NFS3PROC_FSSTAT] = { 1013 .pc_func = nfsd3_proc_fsstat, 1014 .pc_decode = nfs3svc_decode_fhandleargs, 1015 .pc_encode = nfs3svc_encode_fsstatres, 1016 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1017 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1018 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1019 .pc_cachetype = RC_NOCACHE, 1020 .pc_xdrressize = ST+pAT+2*6+1, 1021 .pc_name = "FSSTAT", 1022 }, 1023 [NFS3PROC_FSINFO] = { 1024 .pc_func = nfsd3_proc_fsinfo, 1025 .pc_decode = nfs3svc_decode_fhandleargs, 1026 .pc_encode = nfs3svc_encode_fsinfores, 1027 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1028 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1029 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1030 .pc_cachetype = RC_NOCACHE, 1031 .pc_xdrressize = ST+pAT+12, 1032 .pc_name = "FSINFO", 1033 }, 1034 [NFS3PROC_PATHCONF] = { 1035 .pc_func = nfsd3_proc_pathconf, 1036 .pc_decode = nfs3svc_decode_fhandleargs, 1037 .pc_encode = nfs3svc_encode_pathconfres, 1038 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1039 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1040 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1041 .pc_cachetype = RC_NOCACHE, 1042 .pc_xdrressize = ST+pAT+6, 1043 .pc_name = "PATHCONF", 1044 }, 1045 [NFS3PROC_COMMIT] = { 1046 .pc_func = nfsd3_proc_commit, 1047 .pc_decode = nfs3svc_decode_commitargs, 1048 .pc_encode = nfs3svc_encode_commitres, 1049 .pc_release = nfs3svc_release_fhandle, 1050 .pc_argsize = sizeof(struct nfsd3_commitargs), 1051 .pc_argzero = sizeof(struct nfsd3_commitargs), 1052 .pc_ressize = sizeof(struct nfsd3_commitres), 1053 .pc_cachetype = RC_NOCACHE, 1054 .pc_xdrressize = ST+WC+2, 1055 .pc_name = "COMMIT", 1056 }, 1057 }; 1058 1059 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]; 1060 const struct svc_version nfsd_version3 = { 1061 .vs_vers = 3, 1062 .vs_nproc = 22, 1063 .vs_proc = nfsd_procedures3, 1064 .vs_dispatch = nfsd_dispatch, 1065 .vs_count = nfsd_count3, 1066 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1067 }; 1068