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 #include "trace.h" 18 19 #define NFSDDBG_FACILITY NFSDDBG_PROC 20 21 static int nfs3_ftypes[] = { 22 0, /* NF3NON */ 23 S_IFREG, /* NF3REG */ 24 S_IFDIR, /* NF3DIR */ 25 S_IFBLK, /* NF3BLK */ 26 S_IFCHR, /* NF3CHR */ 27 S_IFLNK, /* NF3LNK */ 28 S_IFSOCK, /* NF3SOCK */ 29 S_IFIFO, /* NF3FIFO */ 30 }; 31 32 static __be32 nfsd3_map_status(__be32 status) 33 { 34 switch (status) { 35 case nfs_ok: 36 break; 37 case nfserr_nofilehandle: 38 status = nfserr_badhandle; 39 break; 40 case nfserr_wrongsec: 41 case nfserr_file_open: 42 status = nfserr_acces; 43 break; 44 case nfserr_symlink_not_dir: 45 status = nfserr_notdir; 46 break; 47 case nfserr_symlink: 48 case nfserr_wrong_type: 49 status = nfserr_inval; 50 break; 51 } 52 return status; 53 } 54 55 /* 56 * NULL call. 57 */ 58 static __be32 59 nfsd3_proc_null(struct svc_rqst *rqstp) 60 { 61 return rpc_success; 62 } 63 64 /* 65 * Get a file's attributes 66 */ 67 static __be32 68 nfsd3_proc_getattr(struct svc_rqst *rqstp) 69 { 70 struct nfsd_fhandle *argp = rqstp->rq_argp; 71 struct nfsd3_attrstat *resp = rqstp->rq_resp; 72 73 trace_nfsd_vfs_getattr(rqstp, &argp->fh); 74 75 fh_copy(&resp->fh, &argp->fh); 76 resp->status = fh_verify(rqstp, &resp->fh, 0, 77 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 78 if (resp->status != nfs_ok) 79 goto out; 80 81 resp->status = fh_getattr(&resp->fh, &resp->stat); 82 out: 83 resp->status = nfsd3_map_status(resp->status); 84 return rpc_success; 85 } 86 87 /* 88 * Set a file's attributes 89 */ 90 static __be32 91 nfsd3_proc_setattr(struct svc_rqst *rqstp) 92 { 93 struct nfsd3_sattrargs *argp = rqstp->rq_argp; 94 struct nfsd3_attrstat *resp = rqstp->rq_resp; 95 struct nfsd_attrs attrs = { 96 .na_iattr = &argp->attrs, 97 }; 98 const struct timespec64 *guardtime = NULL; 99 100 dprintk("nfsd: SETATTR(3) %s\n", 101 SVCFH_fmt(&argp->fh)); 102 103 fh_copy(&resp->fh, &argp->fh); 104 if (argp->check_guard) 105 guardtime = &argp->guardtime; 106 resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs, guardtime); 107 resp->status = nfsd3_map_status(resp->status); 108 return rpc_success; 109 } 110 111 /* 112 * Look up a path name component 113 */ 114 static __be32 115 nfsd3_proc_lookup(struct svc_rqst *rqstp) 116 { 117 struct nfsd3_diropargs *argp = rqstp->rq_argp; 118 struct nfsd3_diropres *resp = rqstp->rq_resp; 119 120 dprintk("nfsd: LOOKUP(3) %s %.*s\n", 121 SVCFH_fmt(&argp->fh), 122 argp->len, 123 argp->name); 124 125 fh_copy(&resp->dirfh, &argp->fh); 126 fh_init(&resp->fh, NFS3_FHSIZE); 127 128 resp->status = nfsd_lookup(rqstp, &resp->dirfh, 129 argp->name, argp->len, 130 &resp->fh); 131 resp->status = nfsd3_map_status(resp->status); 132 return rpc_success; 133 } 134 135 /* 136 * Check file access 137 */ 138 static __be32 139 nfsd3_proc_access(struct svc_rqst *rqstp) 140 { 141 struct nfsd3_accessargs *argp = rqstp->rq_argp; 142 struct nfsd3_accessres *resp = rqstp->rq_resp; 143 144 dprintk("nfsd: ACCESS(3) %s 0x%x\n", 145 SVCFH_fmt(&argp->fh), 146 argp->access); 147 148 fh_copy(&resp->fh, &argp->fh); 149 resp->access = argp->access; 150 resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL); 151 resp->status = nfsd3_map_status(resp->status); 152 return rpc_success; 153 } 154 155 /* 156 * Read a symlink. 157 */ 158 static __be32 159 nfsd3_proc_readlink(struct svc_rqst *rqstp) 160 { 161 struct nfsd_fhandle *argp = rqstp->rq_argp; 162 struct nfsd3_readlinkres *resp = rqstp->rq_resp; 163 164 dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh)); 165 166 /* Read the symlink. */ 167 fh_copy(&resp->fh, &argp->fh); 168 resp->len = NFS3_MAXPATHLEN; 169 resp->pages = rqstp->rq_next_page++; 170 resp->status = nfsd_readlink(rqstp, &resp->fh, 171 page_address(*resp->pages), &resp->len); 172 resp->status = nfsd3_map_status(resp->status); 173 return rpc_success; 174 } 175 176 /* 177 * Read a portion of a file. 178 */ 179 static __be32 180 nfsd3_proc_read(struct svc_rqst *rqstp) 181 { 182 struct nfsd3_readargs *argp = rqstp->rq_argp; 183 struct nfsd3_readres *resp = rqstp->rq_resp; 184 185 dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", 186 SVCFH_fmt(&argp->fh), 187 (unsigned long) argp->count, 188 (unsigned long long) argp->offset); 189 190 argp->count = min_t(u32, argp->count, svc_max_payload(rqstp)); 191 argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen); 192 if (argp->offset > (u64)OFFSET_MAX) 193 argp->offset = (u64)OFFSET_MAX; 194 if (argp->offset + argp->count > (u64)OFFSET_MAX) 195 argp->count = (u64)OFFSET_MAX - argp->offset; 196 197 resp->pages = rqstp->rq_next_page; 198 199 /* Obtain buffer pointer for payload. 200 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) 201 * + 1 (xdr opaque byte count) = 26 202 */ 203 resp->count = argp->count; 204 svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3) << 2) + 205 resp->count + 4); 206 207 fh_copy(&resp->fh, &argp->fh); 208 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset, 209 &resp->count, &resp->eof); 210 resp->status = nfsd3_map_status(resp->status); 211 return rpc_success; 212 } 213 214 /* 215 * Write data to a file 216 */ 217 static __be32 218 nfsd3_proc_write(struct svc_rqst *rqstp) 219 { 220 struct nfsd3_writeargs *argp = rqstp->rq_argp; 221 struct nfsd3_writeres *resp = rqstp->rq_resp; 222 unsigned long cnt = argp->len; 223 224 dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n", 225 SVCFH_fmt(&argp->fh), 226 argp->len, 227 (unsigned long long) argp->offset, 228 argp->stable ? " stable" : ""); 229 230 resp->status = nfserr_fbig; 231 if (argp->offset > (u64)OFFSET_MAX || 232 argp->offset + argp->len > (u64)OFFSET_MAX) 233 return rpc_success; 234 235 fh_copy(&resp->fh, &argp->fh); 236 resp->committed = argp->stable; 237 resp->status = nfsd_write(rqstp, &resp->fh, argp->offset, 238 &argp->payload, &cnt, 239 resp->committed, resp->verf); 240 resp->count = cnt; 241 resp->status = nfsd3_map_status(resp->status); 242 return rpc_success; 243 } 244 245 /* 246 * Implement NFSv3's unchecked, guarded, and exclusive CREATE 247 * semantics for regular files. Except for the created file, 248 * this operation is stateless on the server. 249 * 250 * Upon return, caller must release @fhp and @resfhp. 251 */ 252 static __be32 253 nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp, 254 struct svc_fh *resfhp, struct nfsd3_createargs *argp) 255 { 256 struct iattr *iap = &argp->attrs; 257 struct dentry *parent, *child; 258 struct nfsd_attrs attrs = { 259 .na_iattr = iap, 260 }; 261 __u32 v_mtime, v_atime; 262 struct inode *inode; 263 __be32 status; 264 int host_err; 265 266 trace_nfsd_vfs_create(rqstp, fhp, S_IFREG, argp->name, argp->len); 267 268 if (isdotent(argp->name, argp->len)) 269 return nfserr_exist; 270 if (!(iap->ia_valid & ATTR_MODE)) 271 iap->ia_mode = 0; 272 273 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC); 274 if (status != nfs_ok) 275 return status; 276 277 parent = fhp->fh_dentry; 278 inode = d_inode(parent); 279 280 host_err = fh_want_write(fhp); 281 if (host_err) 282 return nfserrno(host_err); 283 284 inode_lock_nested(inode, I_MUTEX_PARENT); 285 286 child = lookup_one(&nop_mnt_idmap, 287 &QSTR_LEN(argp->name, argp->len), 288 parent); 289 if (IS_ERR(child)) { 290 status = nfserrno(PTR_ERR(child)); 291 goto out; 292 } 293 294 if (d_really_is_negative(child)) { 295 status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE); 296 if (status != nfs_ok) 297 goto out; 298 } 299 300 status = fh_compose(resfhp, fhp->fh_export, child, fhp); 301 if (status != nfs_ok) 302 goto out; 303 304 v_mtime = 0; 305 v_atime = 0; 306 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 307 u32 *verifier = (u32 *)argp->verf; 308 309 /* 310 * Solaris 7 gets confused (bugid 4218508) if these have 311 * the high bit set, as do xfs filesystems without the 312 * "bigtime" feature. So just clear the high bits. 313 */ 314 v_mtime = verifier[0] & 0x7fffffff; 315 v_atime = verifier[1] & 0x7fffffff; 316 } 317 318 if (d_really_is_positive(child)) { 319 status = nfs_ok; 320 321 switch (argp->createmode) { 322 case NFS3_CREATE_UNCHECKED: 323 if (!d_is_reg(child)) 324 break; 325 iap->ia_valid &= ATTR_SIZE; 326 goto set_attr; 327 case NFS3_CREATE_GUARDED: 328 status = nfserr_exist; 329 break; 330 case NFS3_CREATE_EXCLUSIVE: 331 if (inode_get_mtime_sec(d_inode(child)) == v_mtime && 332 inode_get_atime_sec(d_inode(child)) == v_atime && 333 d_inode(child)->i_size == 0) { 334 break; 335 } 336 status = nfserr_exist; 337 } 338 goto out; 339 } 340 341 if (!IS_POSIXACL(inode)) 342 iap->ia_mode &= ~current_umask(); 343 344 status = fh_fill_pre_attrs(fhp); 345 if (status != nfs_ok) 346 goto out; 347 host_err = vfs_create(&nop_mnt_idmap, inode, child, iap->ia_mode, true); 348 if (host_err < 0) { 349 status = nfserrno(host_err); 350 goto out; 351 } 352 fh_fill_post_attrs(fhp); 353 354 /* A newly created file already has a file size of zero. */ 355 if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0)) 356 iap->ia_valid &= ~ATTR_SIZE; 357 if (argp->createmode == NFS3_CREATE_EXCLUSIVE) { 358 iap->ia_valid = ATTR_MTIME | ATTR_ATIME | 359 ATTR_MTIME_SET | ATTR_ATIME_SET; 360 iap->ia_mtime.tv_sec = v_mtime; 361 iap->ia_atime.tv_sec = v_atime; 362 iap->ia_mtime.tv_nsec = 0; 363 iap->ia_atime.tv_nsec = 0; 364 } 365 366 set_attr: 367 status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs); 368 369 out: 370 inode_unlock(inode); 371 if (child && !IS_ERR(child)) 372 dput(child); 373 fh_drop_write(fhp); 374 return status; 375 } 376 377 static __be32 378 nfsd3_proc_create(struct svc_rqst *rqstp) 379 { 380 struct nfsd3_createargs *argp = rqstp->rq_argp; 381 struct nfsd3_diropres *resp = rqstp->rq_resp; 382 svc_fh *dirfhp, *newfhp; 383 384 dirfhp = fh_copy(&resp->dirfh, &argp->fh); 385 newfhp = fh_init(&resp->fh, NFS3_FHSIZE); 386 387 resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp); 388 resp->status = nfsd3_map_status(resp->status); 389 return rpc_success; 390 } 391 392 /* 393 * Make directory. This operation is not idempotent. 394 */ 395 static __be32 396 nfsd3_proc_mkdir(struct svc_rqst *rqstp) 397 { 398 struct nfsd3_createargs *argp = rqstp->rq_argp; 399 struct nfsd3_diropres *resp = rqstp->rq_resp; 400 struct nfsd_attrs attrs = { 401 .na_iattr = &argp->attrs, 402 }; 403 404 argp->attrs.ia_valid &= ~ATTR_SIZE; 405 fh_copy(&resp->dirfh, &argp->fh); 406 fh_init(&resp->fh, NFS3_FHSIZE); 407 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 408 &attrs, S_IFDIR, 0, &resp->fh); 409 resp->status = nfsd3_map_status(resp->status); 410 return rpc_success; 411 } 412 413 static __be32 414 nfsd3_proc_symlink(struct svc_rqst *rqstp) 415 { 416 struct nfsd3_symlinkargs *argp = rqstp->rq_argp; 417 struct nfsd3_diropres *resp = rqstp->rq_resp; 418 struct nfsd_attrs attrs = { 419 .na_iattr = &argp->attrs, 420 }; 421 422 if (argp->tlen == 0) { 423 resp->status = nfserr_inval; 424 goto out; 425 } 426 if (argp->tlen > NFS3_MAXPATHLEN) { 427 resp->status = nfserr_nametoolong; 428 goto out; 429 } 430 431 argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first, 432 page_address(rqstp->rq_arg.pages[0]), 433 argp->tlen); 434 if (IS_ERR(argp->tname)) { 435 resp->status = nfserrno(PTR_ERR(argp->tname)); 436 goto out; 437 } 438 439 fh_copy(&resp->dirfh, &argp->ffh); 440 fh_init(&resp->fh, NFS3_FHSIZE); 441 resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname, 442 argp->flen, argp->tname, &attrs, &resp->fh); 443 kfree(argp->tname); 444 out: 445 resp->status = nfsd3_map_status(resp->status); 446 return rpc_success; 447 } 448 449 /* 450 * Make socket/fifo/device. 451 */ 452 static __be32 453 nfsd3_proc_mknod(struct svc_rqst *rqstp) 454 { 455 struct nfsd3_mknodargs *argp = rqstp->rq_argp; 456 struct nfsd3_diropres *resp = rqstp->rq_resp; 457 struct nfsd_attrs attrs = { 458 .na_iattr = &argp->attrs, 459 }; 460 int type; 461 dev_t rdev = 0; 462 463 fh_copy(&resp->dirfh, &argp->fh); 464 fh_init(&resp->fh, NFS3_FHSIZE); 465 466 if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) { 467 rdev = MKDEV(argp->major, argp->minor); 468 if (MAJOR(rdev) != argp->major || 469 MINOR(rdev) != argp->minor) { 470 resp->status = nfserr_inval; 471 goto out; 472 } 473 } else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) { 474 resp->status = nfserr_badtype; 475 goto out; 476 } 477 478 type = nfs3_ftypes[argp->ftype]; 479 resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len, 480 &attrs, type, rdev, &resp->fh); 481 out: 482 resp->status = nfsd3_map_status(resp->status); 483 return rpc_success; 484 } 485 486 /* 487 * Remove file/fifo/socket etc. 488 */ 489 static __be32 490 nfsd3_proc_remove(struct svc_rqst *rqstp) 491 { 492 struct nfsd3_diropargs *argp = rqstp->rq_argp; 493 struct nfsd3_attrstat *resp = rqstp->rq_resp; 494 495 /* Unlink. -S_IFDIR means file must not be a directory */ 496 fh_copy(&resp->fh, &argp->fh); 497 resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR, 498 argp->name, argp->len); 499 resp->status = nfsd3_map_status(resp->status); 500 return rpc_success; 501 } 502 503 /* 504 * Remove a directory 505 */ 506 static __be32 507 nfsd3_proc_rmdir(struct svc_rqst *rqstp) 508 { 509 struct nfsd3_diropargs *argp = rqstp->rq_argp; 510 struct nfsd3_attrstat *resp = rqstp->rq_resp; 511 512 fh_copy(&resp->fh, &argp->fh); 513 resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR, 514 argp->name, argp->len); 515 resp->status = nfsd3_map_status(resp->status); 516 return rpc_success; 517 } 518 519 static __be32 520 nfsd3_proc_rename(struct svc_rqst *rqstp) 521 { 522 struct nfsd3_renameargs *argp = rqstp->rq_argp; 523 struct nfsd3_renameres *resp = rqstp->rq_resp; 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 resp->status = nfsd3_map_status(resp->status); 530 return rpc_success; 531 } 532 533 static __be32 534 nfsd3_proc_link(struct svc_rqst *rqstp) 535 { 536 struct nfsd3_linkargs *argp = rqstp->rq_argp; 537 struct nfsd3_linkres *resp = rqstp->rq_resp; 538 539 fh_copy(&resp->fh, &argp->ffh); 540 fh_copy(&resp->tfh, &argp->tfh); 541 resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen, 542 &resp->fh); 543 resp->status = nfsd3_map_status(resp->status); 544 return rpc_success; 545 } 546 547 static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp, 548 struct nfsd3_readdirres *resp, 549 u32 count) 550 { 551 struct xdr_buf *buf = &resp->dirlist; 552 struct xdr_stream *xdr = &resp->xdr; 553 unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen, 554 svc_max_payload(rqstp)); 555 556 memset(buf, 0, sizeof(*buf)); 557 558 /* Reserve room for the NULL ptr & eof flag (-2 words) */ 559 buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf); 560 buf->buflen -= XDR_UNIT * 2; 561 buf->pages = rqstp->rq_next_page; 562 rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT; 563 564 xdr_init_encode_pages(xdr, buf, buf->pages, NULL); 565 } 566 567 /* 568 * Read a portion of a directory. 569 */ 570 static __be32 571 nfsd3_proc_readdir(struct svc_rqst *rqstp) 572 { 573 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 574 struct nfsd3_readdirres *resp = rqstp->rq_resp; 575 loff_t offset; 576 577 trace_nfsd_vfs_readdir(rqstp, &argp->fh, argp->count, argp->cookie); 578 579 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 580 581 fh_copy(&resp->fh, &argp->fh); 582 resp->common.err = nfs_ok; 583 resp->cookie_offset = 0; 584 resp->rqstp = rqstp; 585 offset = argp->cookie; 586 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 587 &resp->common, nfs3svc_encode_entry3); 588 memcpy(resp->verf, argp->verf, 8); 589 nfs3svc_encode_cookie3(resp, offset); 590 591 /* Recycle only pages that were part of the reply */ 592 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 593 594 resp->status = nfsd3_map_status(resp->status); 595 return rpc_success; 596 } 597 598 /* 599 * Read a portion of a directory, including file handles and attrs. 600 * For now, we choose to ignore the dircount parameter. 601 */ 602 static __be32 603 nfsd3_proc_readdirplus(struct svc_rqst *rqstp) 604 { 605 struct nfsd3_readdirargs *argp = rqstp->rq_argp; 606 struct nfsd3_readdirres *resp = rqstp->rq_resp; 607 loff_t offset; 608 609 trace_nfsd_vfs_readdir(rqstp, &argp->fh, argp->count, argp->cookie); 610 611 nfsd3_init_dirlist_pages(rqstp, resp, argp->count); 612 613 fh_copy(&resp->fh, &argp->fh); 614 resp->common.err = nfs_ok; 615 resp->cookie_offset = 0; 616 resp->rqstp = rqstp; 617 offset = argp->cookie; 618 619 resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP); 620 if (resp->status != nfs_ok) 621 goto out; 622 623 if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) { 624 resp->status = nfserr_notsupp; 625 goto out; 626 } 627 628 resp->status = nfsd_readdir(rqstp, &resp->fh, &offset, 629 &resp->common, nfs3svc_encode_entryplus3); 630 memcpy(resp->verf, argp->verf, 8); 631 nfs3svc_encode_cookie3(resp, offset); 632 633 /* Recycle only pages that were part of the reply */ 634 rqstp->rq_next_page = resp->xdr.page_ptr + 1; 635 636 out: 637 resp->status = nfsd3_map_status(resp->status); 638 return rpc_success; 639 } 640 641 /* 642 * Get file system stats 643 */ 644 static __be32 645 nfsd3_proc_fsstat(struct svc_rqst *rqstp) 646 { 647 struct nfsd_fhandle *argp = rqstp->rq_argp; 648 struct nfsd3_fsstatres *resp = rqstp->rq_resp; 649 650 resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0); 651 fh_put(&argp->fh); 652 resp->status = nfsd3_map_status(resp->status); 653 return rpc_success; 654 } 655 656 /* 657 * Get file system info 658 */ 659 static __be32 660 nfsd3_proc_fsinfo(struct svc_rqst *rqstp) 661 { 662 struct nfsd_fhandle *argp = rqstp->rq_argp; 663 struct nfsd3_fsinfores *resp = rqstp->rq_resp; 664 u32 max_blocksize = svc_max_payload(rqstp); 665 666 dprintk("nfsd: FSINFO(3) %s\n", 667 SVCFH_fmt(&argp->fh)); 668 669 resp->f_rtmax = max_blocksize; 670 resp->f_rtpref = max_blocksize; 671 resp->f_rtmult = PAGE_SIZE; 672 resp->f_wtmax = max_blocksize; 673 resp->f_wtpref = max_blocksize; 674 resp->f_wtmult = PAGE_SIZE; 675 resp->f_dtpref = max_blocksize; 676 resp->f_maxfilesize = ~(u32) 0; 677 resp->f_properties = NFS3_FSF_DEFAULT; 678 679 resp->status = fh_verify(rqstp, &argp->fh, 0, 680 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT); 681 682 /* Check special features of the file system. May request 683 * different read/write sizes for file systems known to have 684 * problems with large blocks */ 685 if (resp->status == nfs_ok) { 686 struct super_block *sb = argp->fh.fh_dentry->d_sb; 687 688 /* Note that we don't care for remote fs's here */ 689 if (sb->s_magic == MSDOS_SUPER_MAGIC) { 690 resp->f_properties = NFS3_FSF_BILLYBOY; 691 } 692 resp->f_maxfilesize = sb->s_maxbytes; 693 } 694 695 fh_put(&argp->fh); 696 resp->status = nfsd3_map_status(resp->status); 697 return rpc_success; 698 } 699 700 /* 701 * Get pathconf info for the specified file 702 */ 703 static __be32 704 nfsd3_proc_pathconf(struct svc_rqst *rqstp) 705 { 706 struct nfsd_fhandle *argp = rqstp->rq_argp; 707 struct nfsd3_pathconfres *resp = rqstp->rq_resp; 708 709 dprintk("nfsd: PATHCONF(3) %s\n", 710 SVCFH_fmt(&argp->fh)); 711 712 /* Set default pathconf */ 713 resp->p_link_max = 255; /* at least */ 714 resp->p_name_max = 255; /* at least */ 715 resp->p_no_trunc = 0; 716 resp->p_chown_restricted = 1; 717 resp->p_case_insensitive = 0; 718 resp->p_case_preserving = 1; 719 720 resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP); 721 722 if (resp->status == nfs_ok) { 723 struct super_block *sb = argp->fh.fh_dentry->d_sb; 724 725 /* Note that we don't care for remote fs's here */ 726 switch (sb->s_magic) { 727 case EXT2_SUPER_MAGIC: 728 resp->p_link_max = EXT2_LINK_MAX; 729 resp->p_name_max = EXT2_NAME_LEN; 730 break; 731 case MSDOS_SUPER_MAGIC: 732 resp->p_case_insensitive = 1; 733 resp->p_case_preserving = 0; 734 break; 735 } 736 } 737 738 fh_put(&argp->fh); 739 resp->status = nfsd3_map_status(resp->status); 740 return rpc_success; 741 } 742 743 /* 744 * Commit a file (range) to stable storage. 745 */ 746 static __be32 747 nfsd3_proc_commit(struct svc_rqst *rqstp) 748 { 749 struct nfsd3_commitargs *argp = rqstp->rq_argp; 750 struct nfsd3_commitres *resp = rqstp->rq_resp; 751 struct nfsd_file *nf; 752 753 dprintk("nfsd: COMMIT(3) %s %u@%Lu\n", 754 SVCFH_fmt(&argp->fh), 755 argp->count, 756 (unsigned long long) argp->offset); 757 758 fh_copy(&resp->fh, &argp->fh); 759 resp->status = nfsd_file_acquire_gc(rqstp, &resp->fh, NFSD_MAY_WRITE | 760 NFSD_MAY_NOT_BREAK_LEASE, &nf); 761 if (resp->status) 762 goto out; 763 resp->status = nfsd_commit(rqstp, &resp->fh, nf, argp->offset, 764 argp->count, resp->verf); 765 nfsd_file_put(nf); 766 out: 767 resp->status = nfsd3_map_status(resp->status); 768 return rpc_success; 769 } 770 771 772 /* 773 * NFSv3 Server procedures. 774 * Only the results of non-idempotent operations are cached. 775 */ 776 #define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat 777 #define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat 778 #define nfsd3_mkdirargs nfsd3_createargs 779 #define nfsd3_readdirplusargs nfsd3_readdirargs 780 #define nfsd3_fhandleargs nfsd_fhandle 781 #define nfsd3_attrstatres nfsd3_attrstat 782 #define nfsd3_wccstatres nfsd3_attrstat 783 #define nfsd3_createres nfsd3_diropres 784 785 #define ST 1 /* status*/ 786 #define FH 17 /* filehandle with length */ 787 #define AT 21 /* attributes */ 788 #define pAT (1+AT) /* post attributes - conditional */ 789 #define WC (7+pAT) /* WCC attributes */ 790 791 static const struct svc_procedure nfsd_procedures3[22] = { 792 [NFS3PROC_NULL] = { 793 .pc_func = nfsd3_proc_null, 794 .pc_decode = nfssvc_decode_voidarg, 795 .pc_encode = nfssvc_encode_voidres, 796 .pc_argsize = sizeof(struct nfsd_voidargs), 797 .pc_argzero = sizeof(struct nfsd_voidargs), 798 .pc_ressize = sizeof(struct nfsd_voidres), 799 .pc_cachetype = RC_NOCACHE, 800 .pc_xdrressize = ST, 801 .pc_name = "NULL", 802 }, 803 [NFS3PROC_GETATTR] = { 804 .pc_func = nfsd3_proc_getattr, 805 .pc_decode = nfs3svc_decode_fhandleargs, 806 .pc_encode = nfs3svc_encode_getattrres, 807 .pc_release = nfs3svc_release_fhandle, 808 .pc_argsize = sizeof(struct nfsd_fhandle), 809 .pc_argzero = sizeof(struct nfsd_fhandle), 810 .pc_ressize = sizeof(struct nfsd3_attrstatres), 811 .pc_cachetype = RC_NOCACHE, 812 .pc_xdrressize = ST+AT, 813 .pc_name = "GETATTR", 814 }, 815 [NFS3PROC_SETATTR] = { 816 .pc_func = nfsd3_proc_setattr, 817 .pc_decode = nfs3svc_decode_sattrargs, 818 .pc_encode = nfs3svc_encode_wccstatres, 819 .pc_release = nfs3svc_release_fhandle, 820 .pc_argsize = sizeof(struct nfsd3_sattrargs), 821 .pc_argzero = sizeof(struct nfsd3_sattrargs), 822 .pc_ressize = sizeof(struct nfsd3_wccstatres), 823 .pc_cachetype = RC_REPLBUFF, 824 .pc_xdrressize = ST+WC, 825 .pc_name = "SETATTR", 826 }, 827 [NFS3PROC_LOOKUP] = { 828 .pc_func = nfsd3_proc_lookup, 829 .pc_decode = nfs3svc_decode_diropargs, 830 .pc_encode = nfs3svc_encode_lookupres, 831 .pc_release = nfs3svc_release_fhandle2, 832 .pc_argsize = sizeof(struct nfsd3_diropargs), 833 .pc_argzero = sizeof(struct nfsd3_diropargs), 834 .pc_ressize = sizeof(struct nfsd3_diropres), 835 .pc_cachetype = RC_NOCACHE, 836 .pc_xdrressize = ST+FH+pAT+pAT, 837 .pc_name = "LOOKUP", 838 }, 839 [NFS3PROC_ACCESS] = { 840 .pc_func = nfsd3_proc_access, 841 .pc_decode = nfs3svc_decode_accessargs, 842 .pc_encode = nfs3svc_encode_accessres, 843 .pc_release = nfs3svc_release_fhandle, 844 .pc_argsize = sizeof(struct nfsd3_accessargs), 845 .pc_argzero = sizeof(struct nfsd3_accessargs), 846 .pc_ressize = sizeof(struct nfsd3_accessres), 847 .pc_cachetype = RC_NOCACHE, 848 .pc_xdrressize = ST+pAT+1, 849 .pc_name = "ACCESS", 850 }, 851 [NFS3PROC_READLINK] = { 852 .pc_func = nfsd3_proc_readlink, 853 .pc_decode = nfs3svc_decode_fhandleargs, 854 .pc_encode = nfs3svc_encode_readlinkres, 855 .pc_release = nfs3svc_release_fhandle, 856 .pc_argsize = sizeof(struct nfsd_fhandle), 857 .pc_argzero = sizeof(struct nfsd_fhandle), 858 .pc_ressize = sizeof(struct nfsd3_readlinkres), 859 .pc_cachetype = RC_NOCACHE, 860 .pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4, 861 .pc_name = "READLINK", 862 }, 863 [NFS3PROC_READ] = { 864 .pc_func = nfsd3_proc_read, 865 .pc_decode = nfs3svc_decode_readargs, 866 .pc_encode = nfs3svc_encode_readres, 867 .pc_release = nfs3svc_release_fhandle, 868 .pc_argsize = sizeof(struct nfsd3_readargs), 869 .pc_argzero = sizeof(struct nfsd3_readargs), 870 .pc_ressize = sizeof(struct nfsd3_readres), 871 .pc_cachetype = RC_NOCACHE, 872 .pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4, 873 .pc_name = "READ", 874 }, 875 [NFS3PROC_WRITE] = { 876 .pc_func = nfsd3_proc_write, 877 .pc_decode = nfs3svc_decode_writeargs, 878 .pc_encode = nfs3svc_encode_writeres, 879 .pc_release = nfs3svc_release_fhandle, 880 .pc_argsize = sizeof(struct nfsd3_writeargs), 881 .pc_argzero = sizeof(struct nfsd3_writeargs), 882 .pc_ressize = sizeof(struct nfsd3_writeres), 883 .pc_cachetype = RC_REPLBUFF, 884 .pc_xdrressize = ST+WC+4, 885 .pc_name = "WRITE", 886 }, 887 [NFS3PROC_CREATE] = { 888 .pc_func = nfsd3_proc_create, 889 .pc_decode = nfs3svc_decode_createargs, 890 .pc_encode = nfs3svc_encode_createres, 891 .pc_release = nfs3svc_release_fhandle2, 892 .pc_argsize = sizeof(struct nfsd3_createargs), 893 .pc_argzero = sizeof(struct nfsd3_createargs), 894 .pc_ressize = sizeof(struct nfsd3_createres), 895 .pc_cachetype = RC_REPLBUFF, 896 .pc_xdrressize = ST+(1+FH+pAT)+WC, 897 .pc_name = "CREATE", 898 }, 899 [NFS3PROC_MKDIR] = { 900 .pc_func = nfsd3_proc_mkdir, 901 .pc_decode = nfs3svc_decode_mkdirargs, 902 .pc_encode = nfs3svc_encode_createres, 903 .pc_release = nfs3svc_release_fhandle2, 904 .pc_argsize = sizeof(struct nfsd3_mkdirargs), 905 .pc_argzero = sizeof(struct nfsd3_mkdirargs), 906 .pc_ressize = sizeof(struct nfsd3_createres), 907 .pc_cachetype = RC_REPLBUFF, 908 .pc_xdrressize = ST+(1+FH+pAT)+WC, 909 .pc_name = "MKDIR", 910 }, 911 [NFS3PROC_SYMLINK] = { 912 .pc_func = nfsd3_proc_symlink, 913 .pc_decode = nfs3svc_decode_symlinkargs, 914 .pc_encode = nfs3svc_encode_createres, 915 .pc_release = nfs3svc_release_fhandle2, 916 .pc_argsize = sizeof(struct nfsd3_symlinkargs), 917 .pc_argzero = sizeof(struct nfsd3_symlinkargs), 918 .pc_ressize = sizeof(struct nfsd3_createres), 919 .pc_cachetype = RC_REPLBUFF, 920 .pc_xdrressize = ST+(1+FH+pAT)+WC, 921 .pc_name = "SYMLINK", 922 }, 923 [NFS3PROC_MKNOD] = { 924 .pc_func = nfsd3_proc_mknod, 925 .pc_decode = nfs3svc_decode_mknodargs, 926 .pc_encode = nfs3svc_encode_createres, 927 .pc_release = nfs3svc_release_fhandle2, 928 .pc_argsize = sizeof(struct nfsd3_mknodargs), 929 .pc_argzero = sizeof(struct nfsd3_mknodargs), 930 .pc_ressize = sizeof(struct nfsd3_createres), 931 .pc_cachetype = RC_REPLBUFF, 932 .pc_xdrressize = ST+(1+FH+pAT)+WC, 933 .pc_name = "MKNOD", 934 }, 935 [NFS3PROC_REMOVE] = { 936 .pc_func = nfsd3_proc_remove, 937 .pc_decode = nfs3svc_decode_diropargs, 938 .pc_encode = nfs3svc_encode_wccstatres, 939 .pc_release = nfs3svc_release_fhandle, 940 .pc_argsize = sizeof(struct nfsd3_diropargs), 941 .pc_argzero = sizeof(struct nfsd3_diropargs), 942 .pc_ressize = sizeof(struct nfsd3_wccstatres), 943 .pc_cachetype = RC_REPLBUFF, 944 .pc_xdrressize = ST+WC, 945 .pc_name = "REMOVE", 946 }, 947 [NFS3PROC_RMDIR] = { 948 .pc_func = nfsd3_proc_rmdir, 949 .pc_decode = nfs3svc_decode_diropargs, 950 .pc_encode = nfs3svc_encode_wccstatres, 951 .pc_release = nfs3svc_release_fhandle, 952 .pc_argsize = sizeof(struct nfsd3_diropargs), 953 .pc_argzero = sizeof(struct nfsd3_diropargs), 954 .pc_ressize = sizeof(struct nfsd3_wccstatres), 955 .pc_cachetype = RC_REPLBUFF, 956 .pc_xdrressize = ST+WC, 957 .pc_name = "RMDIR", 958 }, 959 [NFS3PROC_RENAME] = { 960 .pc_func = nfsd3_proc_rename, 961 .pc_decode = nfs3svc_decode_renameargs, 962 .pc_encode = nfs3svc_encode_renameres, 963 .pc_release = nfs3svc_release_fhandle2, 964 .pc_argsize = sizeof(struct nfsd3_renameargs), 965 .pc_argzero = sizeof(struct nfsd3_renameargs), 966 .pc_ressize = sizeof(struct nfsd3_renameres), 967 .pc_cachetype = RC_REPLBUFF, 968 .pc_xdrressize = ST+WC+WC, 969 .pc_name = "RENAME", 970 }, 971 [NFS3PROC_LINK] = { 972 .pc_func = nfsd3_proc_link, 973 .pc_decode = nfs3svc_decode_linkargs, 974 .pc_encode = nfs3svc_encode_linkres, 975 .pc_release = nfs3svc_release_fhandle2, 976 .pc_argsize = sizeof(struct nfsd3_linkargs), 977 .pc_argzero = sizeof(struct nfsd3_linkargs), 978 .pc_ressize = sizeof(struct nfsd3_linkres), 979 .pc_cachetype = RC_REPLBUFF, 980 .pc_xdrressize = ST+pAT+WC, 981 .pc_name = "LINK", 982 }, 983 [NFS3PROC_READDIR] = { 984 .pc_func = nfsd3_proc_readdir, 985 .pc_decode = nfs3svc_decode_readdirargs, 986 .pc_encode = nfs3svc_encode_readdirres, 987 .pc_release = nfs3svc_release_fhandle, 988 .pc_argsize = sizeof(struct nfsd3_readdirargs), 989 .pc_argzero = sizeof(struct nfsd3_readdirargs), 990 .pc_ressize = sizeof(struct nfsd3_readdirres), 991 .pc_cachetype = RC_NOCACHE, 992 .pc_name = "READDIR", 993 }, 994 [NFS3PROC_READDIRPLUS] = { 995 .pc_func = nfsd3_proc_readdirplus, 996 .pc_decode = nfs3svc_decode_readdirplusargs, 997 .pc_encode = nfs3svc_encode_readdirres, 998 .pc_release = nfs3svc_release_fhandle, 999 .pc_argsize = sizeof(struct nfsd3_readdirplusargs), 1000 .pc_argzero = sizeof(struct nfsd3_readdirplusargs), 1001 .pc_ressize = sizeof(struct nfsd3_readdirres), 1002 .pc_cachetype = RC_NOCACHE, 1003 .pc_name = "READDIRPLUS", 1004 }, 1005 [NFS3PROC_FSSTAT] = { 1006 .pc_func = nfsd3_proc_fsstat, 1007 .pc_decode = nfs3svc_decode_fhandleargs, 1008 .pc_encode = nfs3svc_encode_fsstatres, 1009 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1010 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1011 .pc_ressize = sizeof(struct nfsd3_fsstatres), 1012 .pc_cachetype = RC_NOCACHE, 1013 .pc_xdrressize = ST+pAT+2*6+1, 1014 .pc_name = "FSSTAT", 1015 }, 1016 [NFS3PROC_FSINFO] = { 1017 .pc_func = nfsd3_proc_fsinfo, 1018 .pc_decode = nfs3svc_decode_fhandleargs, 1019 .pc_encode = nfs3svc_encode_fsinfores, 1020 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1021 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1022 .pc_ressize = sizeof(struct nfsd3_fsinfores), 1023 .pc_cachetype = RC_NOCACHE, 1024 .pc_xdrressize = ST+pAT+12, 1025 .pc_name = "FSINFO", 1026 }, 1027 [NFS3PROC_PATHCONF] = { 1028 .pc_func = nfsd3_proc_pathconf, 1029 .pc_decode = nfs3svc_decode_fhandleargs, 1030 .pc_encode = nfs3svc_encode_pathconfres, 1031 .pc_argsize = sizeof(struct nfsd3_fhandleargs), 1032 .pc_argzero = sizeof(struct nfsd3_fhandleargs), 1033 .pc_ressize = sizeof(struct nfsd3_pathconfres), 1034 .pc_cachetype = RC_NOCACHE, 1035 .pc_xdrressize = ST+pAT+6, 1036 .pc_name = "PATHCONF", 1037 }, 1038 [NFS3PROC_COMMIT] = { 1039 .pc_func = nfsd3_proc_commit, 1040 .pc_decode = nfs3svc_decode_commitargs, 1041 .pc_encode = nfs3svc_encode_commitres, 1042 .pc_release = nfs3svc_release_fhandle, 1043 .pc_argsize = sizeof(struct nfsd3_commitargs), 1044 .pc_argzero = sizeof(struct nfsd3_commitargs), 1045 .pc_ressize = sizeof(struct nfsd3_commitres), 1046 .pc_cachetype = RC_NOCACHE, 1047 .pc_xdrressize = ST+WC+2, 1048 .pc_name = "COMMIT", 1049 }, 1050 }; 1051 1052 static DEFINE_PER_CPU_ALIGNED(unsigned long, 1053 nfsd_count3[ARRAY_SIZE(nfsd_procedures3)]); 1054 const struct svc_version nfsd_version3 = { 1055 .vs_vers = 3, 1056 .vs_nproc = ARRAY_SIZE(nfsd_procedures3), 1057 .vs_proc = nfsd_procedures3, 1058 .vs_dispatch = nfsd_dispatch, 1059 .vs_count = nfsd_count3, 1060 .vs_xdrsize = NFS3_SVC_XDRSIZE, 1061 }; 1062