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