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