1 /* $OpenBSD: nfs_subs.c,v 1.113 2011/07/04 21:00:10 deraadt Exp $ */ 2 /* $NetBSD: nfs_subs.c,v 1.27.4.3 1996/07/08 20:34:24 jtc Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 36 */ 37 38 39 /* 40 * These functions support the macros and help fiddle mbuf chains for 41 * the nfs op functions. They do things like create the rpc header and 42 * copy data between mbuf chains and uio lists. 43 */ 44 #include <sys/param.h> 45 #include <sys/proc.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/mount.h> 49 #include <sys/vnode.h> 50 #include <sys/namei.h> 51 #include <sys/mbuf.h> 52 #include <sys/socket.h> 53 #include <sys/socketvar.h> 54 #include <sys/stat.h> 55 #include <sys/pool.h> 56 #include <sys/time.h> 57 #include <sys/specdev.h> 58 59 #include <uvm/uvm_extern.h> 60 61 #include <nfs/rpcv2.h> 62 #include <nfs/nfsproto.h> 63 #include <nfs/nfsnode.h> 64 #include <nfs/nfs.h> 65 #include <nfs/xdr_subs.h> 66 #include <nfs/nfsm_subs.h> 67 #include <nfs/nfsmount.h> 68 #include <nfs/nfs_var.h> 69 70 71 #include <netinet/in.h> 72 73 #include <dev/rndvar.h> 74 #include <crypto/idgen.h> 75 76 int nfs_attrtimeo(struct nfsnode *np); 77 78 /* 79 * Data items converted to xdr at startup, since they are constant 80 * This is kinda hokey, but may save a little time doing byte swaps 81 */ 82 u_int32_t nfs_xdrneg1; 83 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 84 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted; 85 u_int32_t nfs_prog, nfs_true, nfs_false; 86 87 /* And other global data */ 88 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 89 NFCHR, NFNON }; 90 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 91 NFFIFO, NFNON }; 92 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 93 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 94 int nfs_ticks; 95 struct nfsstats nfsstats; 96 97 /* 98 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 99 */ 100 int nfsv3_procid[NFS_NPROCS] = { 101 NFSPROC_NULL, 102 NFSPROC_GETATTR, 103 NFSPROC_SETATTR, 104 NFSPROC_NOOP, 105 NFSPROC_LOOKUP, 106 NFSPROC_READLINK, 107 NFSPROC_READ, 108 NFSPROC_NOOP, 109 NFSPROC_WRITE, 110 NFSPROC_CREATE, 111 NFSPROC_REMOVE, 112 NFSPROC_RENAME, 113 NFSPROC_LINK, 114 NFSPROC_SYMLINK, 115 NFSPROC_MKDIR, 116 NFSPROC_RMDIR, 117 NFSPROC_READDIR, 118 NFSPROC_FSSTAT, 119 NFSPROC_NOOP, 120 NFSPROC_NOOP, 121 NFSPROC_NOOP, 122 NFSPROC_NOOP, 123 NFSPROC_NOOP 124 }; 125 126 /* 127 * and the reverse mapping from generic to Version 2 procedure numbers 128 */ 129 int nfsv2_procid[NFS_NPROCS] = { 130 NFSV2PROC_NULL, 131 NFSV2PROC_GETATTR, 132 NFSV2PROC_SETATTR, 133 NFSV2PROC_LOOKUP, 134 NFSV2PROC_NOOP, 135 NFSV2PROC_READLINK, 136 NFSV2PROC_READ, 137 NFSV2PROC_WRITE, 138 NFSV2PROC_CREATE, 139 NFSV2PROC_MKDIR, 140 NFSV2PROC_SYMLINK, 141 NFSV2PROC_CREATE, 142 NFSV2PROC_REMOVE, 143 NFSV2PROC_RMDIR, 144 NFSV2PROC_RENAME, 145 NFSV2PROC_LINK, 146 NFSV2PROC_READDIR, 147 NFSV2PROC_NOOP, 148 NFSV2PROC_STATFS, 149 NFSV2PROC_NOOP, 150 NFSV2PROC_NOOP, 151 NFSV2PROC_NOOP, 152 NFSV2PROC_NOOP 153 }; 154 155 /* 156 * Maps errno values to nfs error numbers. 157 * Use NFSERR_IO as the catch all for ones not specifically defined in 158 * RFC 1094. 159 */ 160 static u_char nfsrv_v2errmap[] = { 161 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 162 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 163 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 164 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 165 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 166 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 167 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 168 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 169 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 170 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 171 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 172 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 173 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 174 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE 175 /* Everything after this maps to NFSERR_IO, so far */ 176 }; 177 178 /* 179 * Maps errno values to nfs error numbers. 180 * Although it is not obvious whether or not NFS clients really care if 181 * a returned error value is in the specified list for the procedure, the 182 * safest thing to do is filter them appropriately. For Version 2, the 183 * X/Open XNFS document is the only specification that defines error values 184 * for each RPC (The RFC simply lists all possible error values for all RPCs), 185 * so I have decided to not do this for Version 2. 186 * The first entry is the default error return and the rest are the valid 187 * errors for that RPC in increasing numeric order. 188 */ 189 static short nfsv3err_null[] = { 190 0, 191 0, 192 }; 193 194 static short nfsv3err_getattr[] = { 195 NFSERR_IO, 196 NFSERR_IO, 197 NFSERR_STALE, 198 NFSERR_BADHANDLE, 199 NFSERR_SERVERFAULT, 200 0, 201 }; 202 203 static short nfsv3err_setattr[] = { 204 NFSERR_IO, 205 NFSERR_PERM, 206 NFSERR_IO, 207 NFSERR_ACCES, 208 NFSERR_INVAL, 209 NFSERR_NOSPC, 210 NFSERR_ROFS, 211 NFSERR_DQUOT, 212 NFSERR_STALE, 213 NFSERR_BADHANDLE, 214 NFSERR_NOT_SYNC, 215 NFSERR_SERVERFAULT, 216 0, 217 }; 218 219 static short nfsv3err_lookup[] = { 220 NFSERR_IO, 221 NFSERR_NOENT, 222 NFSERR_IO, 223 NFSERR_ACCES, 224 NFSERR_NOTDIR, 225 NFSERR_NAMETOL, 226 NFSERR_STALE, 227 NFSERR_BADHANDLE, 228 NFSERR_SERVERFAULT, 229 0, 230 }; 231 232 static short nfsv3err_access[] = { 233 NFSERR_IO, 234 NFSERR_IO, 235 NFSERR_STALE, 236 NFSERR_BADHANDLE, 237 NFSERR_SERVERFAULT, 238 0, 239 }; 240 241 static short nfsv3err_readlink[] = { 242 NFSERR_IO, 243 NFSERR_IO, 244 NFSERR_ACCES, 245 NFSERR_INVAL, 246 NFSERR_STALE, 247 NFSERR_BADHANDLE, 248 NFSERR_NOTSUPP, 249 NFSERR_SERVERFAULT, 250 0, 251 }; 252 253 static short nfsv3err_read[] = { 254 NFSERR_IO, 255 NFSERR_IO, 256 NFSERR_NXIO, 257 NFSERR_ACCES, 258 NFSERR_INVAL, 259 NFSERR_STALE, 260 NFSERR_BADHANDLE, 261 NFSERR_SERVERFAULT, 262 0, 263 }; 264 265 static short nfsv3err_write[] = { 266 NFSERR_IO, 267 NFSERR_IO, 268 NFSERR_ACCES, 269 NFSERR_INVAL, 270 NFSERR_FBIG, 271 NFSERR_NOSPC, 272 NFSERR_ROFS, 273 NFSERR_DQUOT, 274 NFSERR_STALE, 275 NFSERR_BADHANDLE, 276 NFSERR_SERVERFAULT, 277 0, 278 }; 279 280 static short nfsv3err_create[] = { 281 NFSERR_IO, 282 NFSERR_IO, 283 NFSERR_ACCES, 284 NFSERR_EXIST, 285 NFSERR_NOTDIR, 286 NFSERR_NOSPC, 287 NFSERR_ROFS, 288 NFSERR_NAMETOL, 289 NFSERR_DQUOT, 290 NFSERR_STALE, 291 NFSERR_BADHANDLE, 292 NFSERR_NOTSUPP, 293 NFSERR_SERVERFAULT, 294 0, 295 }; 296 297 static short nfsv3err_mkdir[] = { 298 NFSERR_IO, 299 NFSERR_IO, 300 NFSERR_ACCES, 301 NFSERR_EXIST, 302 NFSERR_NOTDIR, 303 NFSERR_NOSPC, 304 NFSERR_ROFS, 305 NFSERR_NAMETOL, 306 NFSERR_DQUOT, 307 NFSERR_STALE, 308 NFSERR_BADHANDLE, 309 NFSERR_NOTSUPP, 310 NFSERR_SERVERFAULT, 311 0, 312 }; 313 314 static short nfsv3err_symlink[] = { 315 NFSERR_IO, 316 NFSERR_IO, 317 NFSERR_ACCES, 318 NFSERR_EXIST, 319 NFSERR_NOTDIR, 320 NFSERR_NOSPC, 321 NFSERR_ROFS, 322 NFSERR_NAMETOL, 323 NFSERR_DQUOT, 324 NFSERR_STALE, 325 NFSERR_BADHANDLE, 326 NFSERR_NOTSUPP, 327 NFSERR_SERVERFAULT, 328 0, 329 }; 330 331 static short nfsv3err_mknod[] = { 332 NFSERR_IO, 333 NFSERR_IO, 334 NFSERR_ACCES, 335 NFSERR_EXIST, 336 NFSERR_NOTDIR, 337 NFSERR_NOSPC, 338 NFSERR_ROFS, 339 NFSERR_NAMETOL, 340 NFSERR_DQUOT, 341 NFSERR_STALE, 342 NFSERR_BADHANDLE, 343 NFSERR_NOTSUPP, 344 NFSERR_SERVERFAULT, 345 NFSERR_BADTYPE, 346 0, 347 }; 348 349 static short nfsv3err_remove[] = { 350 NFSERR_IO, 351 NFSERR_NOENT, 352 NFSERR_IO, 353 NFSERR_ACCES, 354 NFSERR_NOTDIR, 355 NFSERR_ROFS, 356 NFSERR_NAMETOL, 357 NFSERR_STALE, 358 NFSERR_BADHANDLE, 359 NFSERR_SERVERFAULT, 360 0, 361 }; 362 363 static short nfsv3err_rmdir[] = { 364 NFSERR_IO, 365 NFSERR_NOENT, 366 NFSERR_IO, 367 NFSERR_ACCES, 368 NFSERR_EXIST, 369 NFSERR_NOTDIR, 370 NFSERR_INVAL, 371 NFSERR_ROFS, 372 NFSERR_NAMETOL, 373 NFSERR_NOTEMPTY, 374 NFSERR_STALE, 375 NFSERR_BADHANDLE, 376 NFSERR_NOTSUPP, 377 NFSERR_SERVERFAULT, 378 0, 379 }; 380 381 static short nfsv3err_rename[] = { 382 NFSERR_IO, 383 NFSERR_NOENT, 384 NFSERR_IO, 385 NFSERR_ACCES, 386 NFSERR_EXIST, 387 NFSERR_XDEV, 388 NFSERR_NOTDIR, 389 NFSERR_ISDIR, 390 NFSERR_INVAL, 391 NFSERR_NOSPC, 392 NFSERR_ROFS, 393 NFSERR_MLINK, 394 NFSERR_NAMETOL, 395 NFSERR_NOTEMPTY, 396 NFSERR_DQUOT, 397 NFSERR_STALE, 398 NFSERR_BADHANDLE, 399 NFSERR_NOTSUPP, 400 NFSERR_SERVERFAULT, 401 0, 402 }; 403 404 static short nfsv3err_link[] = { 405 NFSERR_IO, 406 NFSERR_IO, 407 NFSERR_ACCES, 408 NFSERR_EXIST, 409 NFSERR_XDEV, 410 NFSERR_NOTDIR, 411 NFSERR_INVAL, 412 NFSERR_NOSPC, 413 NFSERR_ROFS, 414 NFSERR_MLINK, 415 NFSERR_NAMETOL, 416 NFSERR_DQUOT, 417 NFSERR_STALE, 418 NFSERR_BADHANDLE, 419 NFSERR_NOTSUPP, 420 NFSERR_SERVERFAULT, 421 0, 422 }; 423 424 static short nfsv3err_readdir[] = { 425 NFSERR_IO, 426 NFSERR_IO, 427 NFSERR_ACCES, 428 NFSERR_NOTDIR, 429 NFSERR_STALE, 430 NFSERR_BADHANDLE, 431 NFSERR_BAD_COOKIE, 432 NFSERR_TOOSMALL, 433 NFSERR_SERVERFAULT, 434 0, 435 }; 436 437 static short nfsv3err_readdirplus[] = { 438 NFSERR_IO, 439 NFSERR_IO, 440 NFSERR_ACCES, 441 NFSERR_NOTDIR, 442 NFSERR_STALE, 443 NFSERR_BADHANDLE, 444 NFSERR_BAD_COOKIE, 445 NFSERR_NOTSUPP, 446 NFSERR_TOOSMALL, 447 NFSERR_SERVERFAULT, 448 0, 449 }; 450 451 static short nfsv3err_fsstat[] = { 452 NFSERR_IO, 453 NFSERR_IO, 454 NFSERR_STALE, 455 NFSERR_BADHANDLE, 456 NFSERR_SERVERFAULT, 457 0, 458 }; 459 460 static short nfsv3err_fsinfo[] = { 461 NFSERR_STALE, 462 NFSERR_STALE, 463 NFSERR_BADHANDLE, 464 NFSERR_SERVERFAULT, 465 0, 466 }; 467 468 static short nfsv3err_pathconf[] = { 469 NFSERR_STALE, 470 NFSERR_STALE, 471 NFSERR_BADHANDLE, 472 NFSERR_SERVERFAULT, 473 0, 474 }; 475 476 static short nfsv3err_commit[] = { 477 NFSERR_IO, 478 NFSERR_IO, 479 NFSERR_STALE, 480 NFSERR_BADHANDLE, 481 NFSERR_SERVERFAULT, 482 0, 483 }; 484 485 static short *nfsrv_v3errmap[] = { 486 nfsv3err_null, 487 nfsv3err_getattr, 488 nfsv3err_setattr, 489 nfsv3err_lookup, 490 nfsv3err_access, 491 nfsv3err_readlink, 492 nfsv3err_read, 493 nfsv3err_write, 494 nfsv3err_create, 495 nfsv3err_mkdir, 496 nfsv3err_symlink, 497 nfsv3err_mknod, 498 nfsv3err_remove, 499 nfsv3err_rmdir, 500 nfsv3err_rename, 501 nfsv3err_link, 502 nfsv3err_readdir, 503 nfsv3err_readdirplus, 504 nfsv3err_fsstat, 505 nfsv3err_fsinfo, 506 nfsv3err_pathconf, 507 nfsv3err_commit, 508 }; 509 510 struct pool nfsreqpl; 511 512 /* 513 * Create the header for an rpc request packet 514 * The hsiz is the size of the rest of the nfs request header. 515 * (just used to decide if a cluster is a good idea) 516 */ 517 struct mbuf * 518 nfsm_reqhead(int hsiz) 519 { 520 struct mbuf *mb; 521 522 MGET(mb, M_WAIT, MT_DATA); 523 if (hsiz > MLEN) 524 MCLGET(mb, M_WAIT); 525 mb->m_len = 0; 526 527 /* Finally, return values */ 528 return (mb); 529 } 530 531 /* 532 * Return an unpredictable XID in XDR form. 533 */ 534 u_int32_t 535 nfs_get_xid(void) 536 { 537 static struct idgen32_ctx nfs_xid_ctx; 538 static int called = 0; 539 540 if (!called) { 541 called = 1; 542 idgen32_init(&nfs_xid_ctx); 543 } 544 return (txdr_unsigned(idgen32(&nfs_xid_ctx))); 545 } 546 547 /* 548 * Build the RPC header and fill in the authorization info. 549 * Right now we are pretty centric around RPCAUTH_UNIX, in the 550 * future, this function will need some love to be able to handle 551 * other authorization methods, such as Kerberos. 552 */ 553 void 554 nfsm_rpchead(struct nfsreq *req, struct ucred *cr, int auth_type) 555 { 556 struct mbuf *mb; 557 u_int32_t *tl; 558 int i, authsiz, auth_len, ngroups; 559 560 KASSERT(auth_type == RPCAUTH_UNIX); 561 562 /* 563 * RPCAUTH_UNIX fits in an hdr mbuf, in the future other 564 * authorization methods need to figure out their own sizes 565 * and allocate and chain mbuf's accorindgly. 566 */ 567 mb = req->r_mreq; 568 569 /* 570 * We need to start out by finding how big the authorization cred 571 * and verifer are for the auth_type, to be able to correctly 572 * align the mbuf header/chain. 573 */ 574 switch (auth_type) { 575 case RPCAUTH_UNIX: 576 /* 577 * In the RPCAUTH_UNIX case, the size is the static 578 * part as shown in RFC1831 + the number of groups, 579 * RPCAUTH_UNIX has a zero verifer. 580 */ 581 if (cr->cr_ngroups > req->r_nmp->nm_numgrps) 582 ngroups = req->r_nmp->nm_numgrps; 583 else 584 ngroups = cr->cr_ngroups; 585 586 auth_len = (ngroups << 2) + 5 * NFSX_UNSIGNED; 587 authsiz = nfsm_rndup(auth_len); 588 /* The authorization size + the size of the static part */ 589 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 590 break; 591 } 592 593 mb->m_len = 0; 594 595 /* First the RPC header. */ 596 tl = nfsm_build(&mb, 6 * NFSX_UNSIGNED); 597 598 /* Get a new (non-zero) xid */ 599 *tl++ = req->r_xid = nfs_get_xid(); 600 *tl++ = rpc_call; 601 *tl++ = rpc_vers; 602 *tl++ = nfs_prog; 603 if (ISSET(req->r_nmp->nm_flag, NFSMNT_NFSV3)) { 604 *tl++ = txdr_unsigned(NFS_VER3); 605 *tl = txdr_unsigned(req->r_procnum); 606 } else { 607 *tl++ = txdr_unsigned(NFS_VER2); 608 *tl = txdr_unsigned(nfsv2_procid[req->r_procnum]); 609 } 610 611 /* The Authorization cred and its verifier */ 612 switch (auth_type) { 613 case RPCAUTH_UNIX: 614 tl = nfsm_build(&mb, auth_len + 4 * NFSX_UNSIGNED); 615 *tl++ = txdr_unsigned(RPCAUTH_UNIX); 616 *tl++ = txdr_unsigned(authsiz); 617 618 /* The authorization cred */ 619 *tl++ = 0; /* stamp */ 620 *tl++ = 0; /* NULL hostname */ 621 *tl++ = txdr_unsigned(cr->cr_uid); 622 *tl++ = txdr_unsigned(cr->cr_gid); 623 *tl++ = txdr_unsigned(ngroups); 624 for (i = 0; i < ngroups; i++) 625 *tl++ = txdr_unsigned(cr->cr_groups[i]); 626 /* The authorization verifier */ 627 *tl++ = txdr_unsigned(RPCAUTH_NULL); 628 *tl = 0; 629 break; 630 } 631 632 mb->m_pkthdr.len += authsiz + 10 * NFSX_UNSIGNED; 633 mb->m_pkthdr.rcvif = NULL; 634 } 635 636 /* 637 * copies mbuf chain to the uio scatter/gather list 638 */ 639 int 640 nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos) 641 { 642 char *mbufcp, *uiocp; 643 int xfer, left, len; 644 struct mbuf *mp; 645 long uiosiz, rem; 646 int error = 0; 647 648 mp = *mrep; 649 mbufcp = *dpos; 650 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 651 rem = nfsm_padlen(siz); 652 while (siz > 0) { 653 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 654 return (EFBIG); 655 left = uiop->uio_iov->iov_len; 656 uiocp = uiop->uio_iov->iov_base; 657 if (left > siz) 658 left = siz; 659 uiosiz = left; 660 while (left > 0) { 661 while (len == 0) { 662 mp = mp->m_next; 663 if (mp == NULL) 664 return (EBADRPC); 665 mbufcp = mtod(mp, caddr_t); 666 len = mp->m_len; 667 } 668 xfer = (left > len) ? len : left; 669 if (uiop->uio_segflg == UIO_SYSSPACE) 670 bcopy(mbufcp, uiocp, xfer); 671 else 672 copyout(mbufcp, uiocp, xfer); 673 left -= xfer; 674 len -= xfer; 675 mbufcp += xfer; 676 uiocp += xfer; 677 uiop->uio_offset += xfer; 678 uiop->uio_resid -= xfer; 679 } 680 if (uiop->uio_iov->iov_len <= siz) { 681 uiop->uio_iovcnt--; 682 uiop->uio_iov++; 683 } else { 684 uiop->uio_iov->iov_base = 685 (char *)uiop->uio_iov->iov_base + uiosiz; 686 uiop->uio_iov->iov_len -= uiosiz; 687 } 688 siz -= uiosiz; 689 } 690 *dpos = mbufcp; 691 *mrep = mp; 692 if (rem > 0) { 693 if (len < rem) 694 error = nfs_adv(mrep, dpos, rem, len); 695 else 696 *dpos += rem; 697 } 698 return (error); 699 } 700 701 /* 702 * Copy a uio scatter/gather list to an mbuf chain. 703 */ 704 void 705 nfsm_uiotombuf(struct mbuf **mp, struct uio *uiop, size_t len) 706 { 707 struct mbuf *mb, *mb2; 708 size_t xfer, pad; 709 710 mb = *mp; 711 712 pad = nfsm_padlen(len); 713 714 /* XXX -- the following should be done by the caller */ 715 uiop->uio_resid = len; 716 uiop->uio_rw = UIO_WRITE; 717 718 while (len) { 719 xfer = min(len, M_TRAILINGSPACE(mb)); 720 uiomove(mb_offset(mb), xfer, uiop); 721 mb->m_len += xfer; 722 len -= xfer; 723 if (len > 0) { 724 MGET(mb2, M_WAIT, MT_DATA); 725 if (len > MLEN) 726 MCLGET(mb2, M_WAIT); 727 mb2->m_len = 0; 728 mb->m_next = mb2; 729 mb = mb2; 730 } 731 } 732 733 if (pad > 0) { 734 if (pad > M_TRAILINGSPACE(mb)) { 735 MGET(mb2, M_WAIT, MT_DATA); 736 mb2->m_len = 0; 737 mb->m_next = mb2; 738 mb = mb2; 739 } 740 bzero(mb_offset(mb), pad); 741 mb->m_len += pad; 742 } 743 744 *mp = mb; 745 } 746 747 /* 748 * Copy a buffer to an mbuf chain 749 */ 750 void 751 nfsm_buftombuf(struct mbuf **mp, void *buf, size_t len) 752 { 753 struct iovec iov; 754 struct uio io; 755 756 iov.iov_base = buf; 757 iov.iov_len = len; 758 759 io.uio_iov = &iov; 760 io.uio_iovcnt = 1; 761 io.uio_resid = len; 762 io.uio_segflg = UIO_SYSSPACE; 763 io.uio_rw = UIO_WRITE; 764 765 nfsm_uiotombuf(mp, &io, len); 766 } 767 768 /* 769 * Copy a string to an mbuf chain 770 */ 771 void 772 nfsm_strtombuf(struct mbuf **mp, void *str, size_t len) 773 { 774 struct iovec iov[2]; 775 struct uio io; 776 uint32_t strlen; 777 778 strlen = txdr_unsigned(len); 779 780 iov[0].iov_base = &strlen; 781 iov[0].iov_len = sizeof(uint32_t); 782 iov[1].iov_base = str; 783 iov[1].iov_len = len; 784 785 io.uio_iov = iov; 786 io.uio_iovcnt = 2; 787 io.uio_resid = sizeof(uint32_t) + len; 788 io.uio_segflg = UIO_SYSSPACE; 789 io.uio_rw = UIO_WRITE; 790 791 nfsm_uiotombuf(mp, &io, io.uio_resid); 792 } 793 794 /* 795 * Help break down an mbuf chain by setting the first siz bytes contiguous 796 * pointed to by returned val. 797 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 798 * cases. (The macros use the vars. dpos and dpos2) 799 */ 800 int 801 nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, caddr_t *cp2) 802 { 803 struct mbuf *mp, *mp2; 804 int siz2, xfer; 805 caddr_t p; 806 807 mp = *mdp; 808 while (left == 0) { 809 *mdp = mp = mp->m_next; 810 if (mp == NULL) 811 return (EBADRPC); 812 left = mp->m_len; 813 *dposp = mtod(mp, caddr_t); 814 } 815 if (left >= siz) { 816 *cp2 = *dposp; 817 *dposp += siz; 818 } else if (mp->m_next == NULL) { 819 return (EBADRPC); 820 } else if (siz > MHLEN) { 821 panic("nfs S too big"); 822 } else { 823 MGET(mp2, M_WAIT, MT_DATA); 824 mp2->m_next = mp->m_next; 825 mp->m_next = mp2; 826 mp->m_len -= left; 827 mp = mp2; 828 *cp2 = p = mtod(mp, caddr_t); 829 bcopy(*dposp, p, left); /* Copy what was left */ 830 siz2 = siz-left; 831 p += left; 832 mp2 = mp->m_next; 833 /* Loop around copying up the siz2 bytes */ 834 while (siz2 > 0) { 835 if (mp2 == NULL) 836 return (EBADRPC); 837 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 838 if (xfer > 0) { 839 bcopy(mtod(mp2, caddr_t), p, xfer); 840 mp2->m_data += xfer; 841 mp2->m_len -= xfer; 842 p += xfer; 843 siz2 -= xfer; 844 } 845 if (siz2 > 0) 846 mp2 = mp2->m_next; 847 } 848 mp->m_len = siz; 849 *mdp = mp2; 850 *dposp = mtod(mp2, caddr_t); 851 } 852 return (0); 853 } 854 855 /* 856 * Advance the position in the mbuf chain. 857 */ 858 int 859 nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left) 860 { 861 struct mbuf *m; 862 int s; 863 864 m = *mdp; 865 s = left; 866 while (s < offs) { 867 offs -= s; 868 m = m->m_next; 869 if (m == NULL) 870 return (EBADRPC); 871 s = m->m_len; 872 } 873 *mdp = m; 874 *dposp = mtod(m, caddr_t)+offs; 875 return (0); 876 } 877 878 /* 879 * Called once to initialize data structures... 880 */ 881 void 882 nfs_init(void) 883 { 884 rpc_vers = txdr_unsigned(RPC_VER2); 885 rpc_call = txdr_unsigned(RPC_CALL); 886 rpc_reply = txdr_unsigned(RPC_REPLY); 887 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 888 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 889 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 890 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 891 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 892 nfs_prog = txdr_unsigned(NFS_PROG); 893 nfs_true = txdr_unsigned(1); 894 nfs_false = txdr_unsigned(0); 895 nfs_xdrneg1 = txdr_unsigned(-1); 896 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 897 if (nfs_ticks < 1) 898 nfs_ticks = 1; 899 #ifdef NFSSERVER 900 nfsrv_init(0); /* Init server data structures */ 901 nfsrv_initcache(); /* Init the server request cache */ 902 #endif /* NFSSERVER */ 903 904 pool_init(&nfsreqpl, sizeof(struct nfsreq), 0, 0, 0, "nfsreqpl", 905 &pool_allocator_nointr); 906 } 907 908 #ifdef NFSCLIENT 909 int 910 nfs_vfs_init(struct vfsconf *vfsp) 911 { 912 extern struct pool nfs_node_pool; 913 914 TAILQ_INIT(&nfs_bufq); 915 916 pool_init(&nfs_node_pool, sizeof(struct nfsnode), 0, 0, 0, 917 "nfsnodepl", NULL); 918 919 return (0); 920 } 921 922 /* 923 * Attribute cache routines. 924 * nfs_loadattrcache() - loads or updates the cache contents from attributes 925 * that are on the mbuf list 926 * nfs_getattrcache() - returns valid attributes if found in cache, returns 927 * error otherwise 928 */ 929 930 /* 931 * Load the attribute cache (that lives in the nfsnode entry) with 932 * the values on the mbuf list and 933 * Iff vap not NULL 934 * copy the attributes to *vaper 935 */ 936 int 937 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 938 struct vattr *vaper) 939 { 940 struct vnode *vp = *vpp; 941 struct vattr *vap; 942 struct nfs_fattr *fp; 943 extern struct vops nfs_specvops; 944 struct nfsnode *np; 945 int32_t t1; 946 caddr_t cp2; 947 int error = 0; 948 int32_t rdev; 949 struct mbuf *md; 950 enum vtype vtyp; 951 mode_t vmode; 952 struct timespec mtime; 953 struct vnode *nvp; 954 int v3 = NFS_ISV3(vp); 955 uid_t uid; 956 gid_t gid; 957 958 md = *mdp; 959 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 960 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 961 if (error) 962 return (error); 963 fp = (struct nfs_fattr *)cp2; 964 if (v3) { 965 vtyp = nfsv3tov_type(fp->fa_type); 966 vmode = fxdr_unsigned(mode_t, fp->fa_mode); 967 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 968 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 969 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 970 } else { 971 vtyp = nfsv2tov_type(fp->fa_type); 972 vmode = fxdr_unsigned(mode_t, fp->fa_mode); 973 if (vtyp == VNON || vtyp == VREG) 974 vtyp = IFTOVT(vmode); 975 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 976 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 977 978 /* 979 * Really ugly NFSv2 kludge. 980 */ 981 if (vtyp == VCHR && rdev == 0xffffffff) 982 vtyp = VFIFO; 983 } 984 985 /* 986 * If v_type == VNON it is a new node, so fill in the v_type, 987 * n_mtime fields. Check to see if it represents a special 988 * device, and if so, check for a possible alias. Once the 989 * correct vnode has been obtained, fill in the rest of the 990 * information. 991 */ 992 np = VTONFS(vp); 993 if (vp->v_type != vtyp) { 994 vp->v_type = vtyp; 995 if (vp->v_type == VFIFO) { 996 #ifndef FIFO 997 return (EOPNOTSUPP); 998 #else 999 extern struct vops nfs_fifovops; 1000 vp->v_op = &nfs_fifovops; 1001 #endif /* FIFO */ 1002 } 1003 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1004 vp->v_op = &nfs_specvops; 1005 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1006 if (nvp) { 1007 /* 1008 * Discard unneeded vnode, but save its nfsnode. 1009 * Since the nfsnode does not have a lock, its 1010 * vnode lock has to be carried over. 1011 */ 1012 1013 nvp->v_data = vp->v_data; 1014 vp->v_data = NULL; 1015 vp->v_op = &spec_vops; 1016 vrele(vp); 1017 vgone(vp); 1018 /* 1019 * Reinitialize aliased node. 1020 */ 1021 np->n_vnode = nvp; 1022 *vpp = vp = nvp; 1023 } 1024 } 1025 np->n_mtime = mtime; 1026 } 1027 vap = &np->n_vattr; 1028 vap->va_type = vtyp; 1029 vap->va_rdev = (dev_t)rdev; 1030 vap->va_mtime = mtime; 1031 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1032 1033 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1034 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1035 /* Invalidate access cache if uid, gid or mode changed. */ 1036 if (np->n_accstamp != -1 && 1037 (gid != vap->va_gid || uid != vap->va_uid || 1038 (vmode & 07777) != vap->va_mode)) 1039 np->n_accstamp = -1; 1040 1041 vap->va_mode = (vmode & 07777); 1042 1043 switch (vtyp) { 1044 case VBLK: 1045 vap->va_blocksize = BLKDEV_IOSIZE; 1046 break; 1047 case VCHR: 1048 vap->va_blocksize = MAXBSIZE; 1049 break; 1050 default: 1051 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1052 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1053 break; 1054 } 1055 if (v3) { 1056 vap->va_nlink = fxdr_unsigned(nlink_t, fp->fa_nlink); 1057 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1058 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1059 vap->va_size = fxdr_hyper(&fp->fa3_size); 1060 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1061 vap->va_fileid = fxdr_unsigned(int32_t, 1062 fp->fa3_fileid.nfsuquad[1]); 1063 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1064 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1065 vap->va_flags = 0; 1066 vap->va_filerev = 0; 1067 } else { 1068 vap->va_nlink = fxdr_unsigned(nlink_t, fp->fa_nlink); 1069 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1070 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1071 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1072 vap->va_bytes = 1073 (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) * 1074 NFS_FABLKSIZE; 1075 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1076 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1077 vap->va_flags = 0; 1078 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1079 fp->fa2_ctime.nfsv2_sec); 1080 vap->va_ctime.tv_nsec = 0; 1081 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1082 vap->va_filerev = 0; 1083 } 1084 1085 if (vap->va_size != np->n_size) { 1086 if (vap->va_type == VREG) { 1087 if (np->n_flag & NMODIFIED) { 1088 if (vap->va_size < np->n_size) 1089 vap->va_size = np->n_size; 1090 else 1091 np->n_size = vap->va_size; 1092 } else 1093 np->n_size = vap->va_size; 1094 uvm_vnp_setsize(vp, np->n_size); 1095 } else 1096 np->n_size = vap->va_size; 1097 } 1098 np->n_attrstamp = time_second; 1099 if (vaper != NULL) { 1100 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1101 if (np->n_flag & NCHG) { 1102 if (np->n_flag & NACC) 1103 vaper->va_atime = np->n_atim; 1104 if (np->n_flag & NUPD) 1105 vaper->va_mtime = np->n_mtim; 1106 } 1107 } 1108 return (0); 1109 } 1110 1111 int 1112 nfs_attrtimeo(struct nfsnode *np) 1113 { 1114 struct vnode *vp = np->n_vnode; 1115 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1116 int tenthage = (time_second - np->n_mtime.tv_sec) / 10; 1117 int minto, maxto; 1118 1119 if (vp->v_type == VDIR) { 1120 maxto = nmp->nm_acdirmax; 1121 minto = nmp->nm_acdirmin; 1122 } 1123 else { 1124 maxto = nmp->nm_acregmax; 1125 minto = nmp->nm_acregmin; 1126 } 1127 1128 if (np->n_flag & NMODIFIED || tenthage < minto) 1129 return minto; 1130 else if (tenthage < maxto) 1131 return tenthage; 1132 else 1133 return maxto; 1134 } 1135 1136 /* 1137 * Check the time stamp 1138 * If the cache is valid, copy contents to *vap and return 0 1139 * otherwise return an error 1140 */ 1141 int 1142 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1143 { 1144 struct nfsnode *np = VTONFS(vp); 1145 struct vattr *vap; 1146 1147 if (np->n_attrstamp == 0 || 1148 (time_second - np->n_attrstamp) >= nfs_attrtimeo(np)) { 1149 nfsstats.attrcache_misses++; 1150 return (ENOENT); 1151 } 1152 nfsstats.attrcache_hits++; 1153 vap = &np->n_vattr; 1154 if (vap->va_size != np->n_size) { 1155 if (vap->va_type == VREG) { 1156 if (np->n_flag & NMODIFIED) { 1157 if (vap->va_size < np->n_size) 1158 vap->va_size = np->n_size; 1159 else 1160 np->n_size = vap->va_size; 1161 } else 1162 np->n_size = vap->va_size; 1163 uvm_vnp_setsize(vp, np->n_size); 1164 } else 1165 np->n_size = vap->va_size; 1166 } 1167 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1168 if (np->n_flag & NCHG) { 1169 if (np->n_flag & NACC) 1170 vaper->va_atime = np->n_atim; 1171 if (np->n_flag & NUPD) 1172 vaper->va_mtime = np->n_mtim; 1173 } 1174 return (0); 1175 } 1176 #endif /* NFSCLIENT */ 1177 1178 /* 1179 * Set up nameidata for a lookup() call and do it 1180 */ 1181 int 1182 nfs_namei(struct nameidata *ndp, fhandle_t *fhp, int len, 1183 struct nfssvc_sock *slp, struct mbuf *nam, struct mbuf **mdp, 1184 caddr_t *dposp, struct vnode **retdirp, struct proc *p) 1185 { 1186 int i, rem; 1187 struct mbuf *md; 1188 char *fromcp, *tocp; 1189 struct vnode *dp; 1190 int error, rdonly; 1191 struct componentname *cnp = &ndp->ni_cnd; 1192 1193 *retdirp = NULL; 1194 cnp->cn_pnbuf = pool_get(&namei_pool, PR_WAITOK); 1195 /* 1196 * Copy the name from the mbuf list to ndp->ni_pnbuf 1197 * and set the various ndp fields appropriately. 1198 */ 1199 fromcp = *dposp; 1200 tocp = cnp->cn_pnbuf; 1201 md = *mdp; 1202 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1203 for (i = 0; i < len; i++) { 1204 while (rem == 0) { 1205 md = md->m_next; 1206 if (md == NULL) { 1207 error = EBADRPC; 1208 goto out; 1209 } 1210 fromcp = mtod(md, caddr_t); 1211 rem = md->m_len; 1212 } 1213 if (*fromcp == '\0' || *fromcp == '/') { 1214 error = EACCES; 1215 goto out; 1216 } 1217 *tocp++ = *fromcp++; 1218 rem--; 1219 } 1220 *tocp = '\0'; 1221 *mdp = md; 1222 *dposp = fromcp; 1223 len = nfsm_padlen(len); 1224 if (len > 0) { 1225 if (rem >= len) 1226 *dposp += len; 1227 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1228 goto out; 1229 } 1230 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1231 cnp->cn_nameptr = cnp->cn_pnbuf; 1232 /* 1233 * Extract and set starting directory. 1234 */ 1235 error = nfsrv_fhtovp(fhp, 0, &dp, ndp->ni_cnd.cn_cred, slp, 1236 nam, &rdonly); 1237 if (error) 1238 goto out; 1239 if (dp->v_type != VDIR) { 1240 vrele(dp); 1241 error = ENOTDIR; 1242 goto out; 1243 } 1244 vref(dp); 1245 *retdirp = dp; 1246 ndp->ni_startdir = dp; 1247 if (rdonly) 1248 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1249 else 1250 cnp->cn_flags |= NOCROSSMOUNT; 1251 /* 1252 * And call lookup() to do the real work 1253 */ 1254 cnp->cn_proc = p; 1255 error = vfs_lookup(ndp); 1256 if (error) 1257 goto out; 1258 /* 1259 * Check for encountering a symbolic link 1260 */ 1261 if (cnp->cn_flags & ISSYMLINK) { 1262 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1263 vput(ndp->ni_dvp); 1264 else 1265 vrele(ndp->ni_dvp); 1266 vput(ndp->ni_vp); 1267 ndp->ni_vp = NULL; 1268 error = EINVAL; 1269 goto out; 1270 } 1271 /* 1272 * Check for saved name request 1273 */ 1274 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1275 cnp->cn_flags |= HASBUF; 1276 return (0); 1277 } 1278 out: 1279 pool_put(&namei_pool, cnp->cn_pnbuf); 1280 return (error); 1281 } 1282 1283 /* 1284 * A fiddled version of m_adj() that ensures null fill to a long 1285 * boundary and only trims off the back end 1286 */ 1287 void 1288 nfsm_adj(struct mbuf *mp, int len, int nul) 1289 { 1290 struct mbuf *m; 1291 int count, i; 1292 char *cp; 1293 1294 /* 1295 * Trim from tail. Scan the mbuf chain, 1296 * calculating its length and finding the last mbuf. 1297 * If the adjustment only affects this mbuf, then just 1298 * adjust and return. Otherwise, rescan and truncate 1299 * after the remaining size. 1300 */ 1301 count = 0; 1302 m = mp; 1303 for (;;) { 1304 count += m->m_len; 1305 if (m->m_next == NULL) 1306 break; 1307 m = m->m_next; 1308 } 1309 if (m->m_len > len) { 1310 m->m_len -= len; 1311 if (nul > 0) { 1312 cp = mtod(m, caddr_t)+m->m_len-nul; 1313 for (i = 0; i < nul; i++) 1314 *cp++ = '\0'; 1315 } 1316 return; 1317 } 1318 count -= len; 1319 if (count < 0) 1320 count = 0; 1321 /* 1322 * Correct length for chain is "count". 1323 * Find the mbuf with last data, adjust its length, 1324 * and toss data from remaining mbufs on chain. 1325 */ 1326 for (m = mp; m; m = m->m_next) { 1327 if (m->m_len >= count) { 1328 m->m_len = count; 1329 if (nul > 0) { 1330 cp = mtod(m, caddr_t)+m->m_len-nul; 1331 for (i = 0; i < nul; i++) 1332 *cp++ = '\0'; 1333 } 1334 break; 1335 } 1336 count -= m->m_len; 1337 } 1338 for (m = m->m_next;m;m = m->m_next) 1339 m->m_len = 0; 1340 } 1341 1342 /* 1343 * Make these functions instead of macros, so that the kernel text size 1344 * doesn't get too big... 1345 */ 1346 void 1347 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1348 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1349 struct nfsm_info *info) 1350 { 1351 u_int32_t *tl; 1352 1353 if (before_ret) { 1354 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED); 1355 *tl = nfs_false; 1356 } else { 1357 tl = nfsm_build(&info->nmi_mb, 7 * NFSX_UNSIGNED); 1358 *tl++ = nfs_true; 1359 txdr_hyper(before_vap->va_size, tl); 1360 tl += 2; 1361 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1362 tl += 2; 1363 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1364 } 1365 nfsm_srvpostop_attr(nfsd, after_ret, after_vap, info); 1366 } 1367 1368 void 1369 nfsm_srvpostop_attr(struct nfsrv_descript *nfsd, int after_ret, 1370 struct vattr *after_vap, struct nfsm_info *info) 1371 { 1372 u_int32_t *tl; 1373 struct nfs_fattr *fp; 1374 1375 if (after_ret) { 1376 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED); 1377 *tl = nfs_false; 1378 } else { 1379 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED + NFSX_V3FATTR); 1380 *tl++ = nfs_true; 1381 fp = (struct nfs_fattr *)tl; 1382 nfsm_srvfattr(nfsd, after_vap, fp); 1383 } 1384 } 1385 1386 void 1387 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, 1388 struct nfs_fattr *fp) 1389 { 1390 1391 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1392 fp->fa_uid = txdr_unsigned(vap->va_uid); 1393 fp->fa_gid = txdr_unsigned(vap->va_gid); 1394 if (nfsd->nd_flag & ND_NFSV3) { 1395 fp->fa_type = vtonfsv3_type(vap->va_type); 1396 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1397 txdr_hyper(vap->va_size, &fp->fa3_size); 1398 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1399 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1400 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1401 fp->fa3_fsid.nfsuquad[0] = 0; 1402 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1403 fp->fa3_fileid.nfsuquad[0] = 0; 1404 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1405 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1406 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1407 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1408 } else { 1409 fp->fa_type = vtonfsv2_type(vap->va_type); 1410 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1411 fp->fa2_size = txdr_unsigned(vap->va_size); 1412 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1413 if (vap->va_type == VFIFO) 1414 fp->fa2_rdev = 0xffffffff; 1415 else 1416 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1417 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1418 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1419 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1420 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1421 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1422 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1423 } 1424 } 1425 1426 /* 1427 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1428 * - look up fsid in mount list (if not found ret error) 1429 * - get vp and export rights by calling VFS_FHTOVP() and VFS_CHECKEXP() 1430 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1431 * - if not lockflag unlock it with VOP_UNLOCK() 1432 */ 1433 int 1434 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, struct vnode **vpp, 1435 struct ucred *cred, struct nfssvc_sock *slp, struct mbuf *nam, 1436 int *rdonlyp) 1437 { 1438 struct proc *p = curproc; /* XXX */ 1439 struct mount *mp; 1440 int i; 1441 struct ucred *credanon; 1442 int error, exflags; 1443 struct sockaddr_in *saddr; 1444 1445 *vpp = NULL; 1446 mp = vfs_getvfs(&fhp->fh_fsid); 1447 1448 if (!mp) 1449 return (ESTALE); 1450 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1451 if (error) 1452 return (error); 1453 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1454 if (error) 1455 return (error); 1456 1457 saddr = mtod(nam, struct sockaddr_in *); 1458 if (saddr->sin_family == AF_INET && 1459 (ntohs(saddr->sin_port) >= IPPORT_RESERVED || 1460 (slp->ns_so->so_type == SOCK_STREAM && ntohs(saddr->sin_port) == 20))) { 1461 vput(*vpp); 1462 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1463 } 1464 1465 /* Check/setup credentials. */ 1466 if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1467 cred->cr_uid = credanon->cr_uid; 1468 cred->cr_gid = credanon->cr_gid; 1469 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1470 cred->cr_groups[i] = credanon->cr_groups[i]; 1471 cred->cr_ngroups = i; 1472 } 1473 if (exflags & MNT_EXRDONLY) 1474 *rdonlyp = 1; 1475 else 1476 *rdonlyp = 0; 1477 if (!lockflag) 1478 VOP_UNLOCK(*vpp, 0, p); 1479 1480 return (0); 1481 } 1482 1483 /* 1484 * This function compares two net addresses by family and returns non zero 1485 * if they are the same host, or if there is any doubt it returns 0. 1486 * The AF_INET family is handled as a special case so that address mbufs 1487 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1488 */ 1489 int 1490 netaddr_match(int family, union nethostaddr *haddr, struct mbuf *nam) 1491 { 1492 struct sockaddr_in *inetaddr; 1493 1494 switch (family) { 1495 case AF_INET: 1496 inetaddr = mtod(nam, struct sockaddr_in *); 1497 if (inetaddr->sin_family == AF_INET && 1498 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1499 return (1); 1500 break; 1501 default: 1502 break; 1503 }; 1504 return (0); 1505 } 1506 1507 /* 1508 * The write verifier has changed (probably due to a server reboot), so all 1509 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1510 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1511 * flag. Once done the new write verifier can be set for the mount point. 1512 */ 1513 void 1514 nfs_clearcommit(struct mount *mp) 1515 { 1516 struct vnode *vp, *nvp; 1517 struct buf *bp, *nbp; 1518 int s; 1519 1520 s = splbio(); 1521 loop: 1522 for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) { 1523 if (vp->v_mount != mp) /* Paranoia */ 1524 goto loop; 1525 nvp = LIST_NEXT(vp, v_mntvnodes); 1526 for (bp = LIST_FIRST(&vp->v_dirtyblkhd); bp != NULL; bp = nbp) { 1527 nbp = LIST_NEXT(bp, b_vnbufs); 1528 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1529 == (B_DELWRI | B_NEEDCOMMIT)) 1530 bp->b_flags &= ~B_NEEDCOMMIT; 1531 } 1532 } 1533 splx(s); 1534 } 1535 1536 void 1537 nfs_merge_commit_ranges(struct vnode *vp) 1538 { 1539 struct nfsnode *np = VTONFS(vp); 1540 1541 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 1542 np->n_pushedlo = np->n_pushlo; 1543 np->n_pushedhi = np->n_pushhi; 1544 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 1545 } else { 1546 if (np->n_pushlo < np->n_pushedlo) 1547 np->n_pushedlo = np->n_pushlo; 1548 if (np->n_pushhi > np->n_pushedhi) 1549 np->n_pushedhi = np->n_pushhi; 1550 } 1551 1552 np->n_pushlo = np->n_pushhi = 0; 1553 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 1554 } 1555 1556 int 1557 nfs_in_committed_range(struct vnode *vp, struct buf *bp) 1558 { 1559 struct nfsnode *np = VTONFS(vp); 1560 off_t lo, hi; 1561 1562 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1563 return 0; 1564 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1565 hi = lo + bp->b_dirtyend; 1566 1567 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 1568 } 1569 1570 int 1571 nfs_in_tobecommitted_range(struct vnode *vp, struct buf *bp) 1572 { 1573 struct nfsnode *np = VTONFS(vp); 1574 off_t lo, hi; 1575 1576 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1577 return 0; 1578 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1579 hi = lo + bp->b_dirtyend; 1580 1581 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 1582 } 1583 1584 void 1585 nfs_add_committed_range(struct vnode *vp, struct buf *bp) 1586 { 1587 struct nfsnode *np = VTONFS(vp); 1588 off_t lo, hi; 1589 1590 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1591 hi = lo + bp->b_dirtyend; 1592 1593 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 1594 np->n_pushedlo = lo; 1595 np->n_pushedhi = hi; 1596 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 1597 } else { 1598 if (hi > np->n_pushedhi) 1599 np->n_pushedhi = hi; 1600 if (lo < np->n_pushedlo) 1601 np->n_pushedlo = lo; 1602 } 1603 } 1604 1605 void 1606 nfs_del_committed_range(struct vnode *vp, struct buf *bp) 1607 { 1608 struct nfsnode *np = VTONFS(vp); 1609 off_t lo, hi; 1610 1611 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1612 return; 1613 1614 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1615 hi = lo + bp->b_dirtyend; 1616 1617 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 1618 return; 1619 if (lo <= np->n_pushedlo) 1620 np->n_pushedlo = hi; 1621 else if (hi >= np->n_pushedhi) 1622 np->n_pushedhi = lo; 1623 else { 1624 /* 1625 * XXX There's only one range. If the deleted range 1626 * is in the middle, pick the largest of the 1627 * contiguous ranges that it leaves. 1628 */ 1629 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 1630 np->n_pushedhi = lo; 1631 else 1632 np->n_pushedlo = hi; 1633 } 1634 } 1635 1636 void 1637 nfs_add_tobecommitted_range(struct vnode *vp, struct buf *bp) 1638 { 1639 struct nfsnode *np = VTONFS(vp); 1640 off_t lo, hi; 1641 1642 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1643 hi = lo + bp->b_dirtyend; 1644 1645 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 1646 np->n_pushlo = lo; 1647 np->n_pushhi = hi; 1648 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 1649 } else { 1650 if (lo < np->n_pushlo) 1651 np->n_pushlo = lo; 1652 if (hi > np->n_pushhi) 1653 np->n_pushhi = hi; 1654 } 1655 } 1656 1657 void 1658 nfs_del_tobecommitted_range(struct vnode *vp, struct buf *bp) 1659 { 1660 struct nfsnode *np = VTONFS(vp); 1661 off_t lo, hi; 1662 1663 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1664 return; 1665 1666 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1667 hi = lo + bp->b_dirtyend; 1668 1669 if (lo > np->n_pushhi || hi < np->n_pushlo) 1670 return; 1671 1672 if (lo <= np->n_pushlo) 1673 np->n_pushlo = hi; 1674 else if (hi >= np->n_pushhi) 1675 np->n_pushhi = lo; 1676 else { 1677 /* 1678 * XXX There's only one range. If the deleted range 1679 * is in the middle, pick the largest of the 1680 * contiguous ranges that it leaves. 1681 */ 1682 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 1683 np->n_pushhi = lo; 1684 else 1685 np->n_pushlo = hi; 1686 } 1687 } 1688 1689 /* 1690 * Map errnos to NFS error numbers. For Version 3 also filter out error 1691 * numbers not specified for the associated procedure. 1692 */ 1693 int 1694 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1695 { 1696 short *defaulterrp, *errp; 1697 1698 if (nd->nd_flag & ND_NFSV3) { 1699 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1700 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1701 while (*++errp) { 1702 if (*errp == err) 1703 return (err); 1704 else if (*errp > err) 1705 break; 1706 } 1707 return ((int)*defaulterrp); 1708 } else 1709 return (err & 0xffff); 1710 } 1711 if (err <= nitems(nfsrv_v2errmap)) 1712 return ((int)nfsrv_v2errmap[err - 1]); 1713 return (NFSERR_IO); 1714 } 1715 1716 /* 1717 * If full is non zero, set all fields, otherwise just set mode and time fields 1718 */ 1719 void 1720 nfsm_v3attrbuild(struct mbuf **mp, struct vattr *a, int full) 1721 { 1722 struct mbuf *mb; 1723 u_int32_t *tl; 1724 1725 mb = *mp; 1726 1727 if (a->va_mode != (mode_t)VNOVAL) { 1728 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1729 *tl++ = nfs_true; 1730 *tl = txdr_unsigned(a->va_mode); 1731 } else { 1732 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1733 *tl = nfs_false; 1734 } 1735 if (full && a->va_uid != (uid_t)VNOVAL) { 1736 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1737 *tl++ = nfs_true; 1738 *tl = txdr_unsigned(a->va_uid); 1739 } else { 1740 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1741 *tl = nfs_false; 1742 } 1743 if (full && a->va_gid != (gid_t)VNOVAL) { 1744 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1745 *tl++ = nfs_true; 1746 *tl = txdr_unsigned((a)->va_gid); 1747 } else { 1748 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1749 *tl = nfs_false; 1750 } 1751 if (full && a->va_size != VNOVAL) { 1752 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1753 *tl++ = nfs_true; 1754 txdr_hyper(a->va_size, tl); 1755 } else { 1756 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1757 *tl = nfs_false; 1758 } 1759 if (a->va_atime.tv_sec != VNOVAL) { 1760 if (a->va_atime.tv_sec != time_second) { 1761 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1762 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 1763 txdr_nfsv3time(&a->va_atime, tl); 1764 } else { 1765 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1766 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 1767 } 1768 } else { 1769 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1770 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 1771 } 1772 if (a->va_mtime.tv_sec != VNOVAL) { 1773 if (a->va_mtime.tv_sec != time_second) { 1774 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1775 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 1776 txdr_nfsv3time(&a->va_mtime, tl); 1777 } else { 1778 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1779 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 1780 } 1781 } else { 1782 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1783 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 1784 } 1785 1786 *mp = mb; 1787 } 1788 1789 /* 1790 * Ensure a contiguous buffer len bytes long 1791 */ 1792 void * 1793 nfsm_build(struct mbuf **mp, u_int len) 1794 { 1795 struct mbuf *mb, *mb2; 1796 caddr_t bpos; 1797 1798 mb = *mp; 1799 bpos = mb_offset(mb); 1800 1801 if (len > M_TRAILINGSPACE(mb)) { 1802 MGET(mb2, M_WAIT, MT_DATA); 1803 if (len > MLEN) 1804 panic("build > MLEN"); 1805 mb->m_next = mb2; 1806 mb = mb2; 1807 mb->m_len = 0; 1808 bpos = mtod(mb, caddr_t); 1809 } 1810 mb->m_len += len; 1811 1812 *mp = mb; 1813 1814 return (bpos); 1815 } 1816 1817 void 1818 nfsm_fhtom(struct nfsm_info *info, struct vnode *v, int v3) 1819 { 1820 struct nfsnode *n = VTONFS(v); 1821 1822 if (v3) { 1823 nfsm_strtombuf(&info->nmi_mb, n->n_fhp, n->n_fhsize); 1824 } else { 1825 nfsm_buftombuf(&info->nmi_mb, n->n_fhp, NFSX_V2FH); 1826 } 1827 } 1828 1829 void 1830 nfsm_srvfhtom(struct mbuf **mp, fhandle_t *f, int v3) 1831 { 1832 if (v3) { 1833 nfsm_strtombuf(mp, f, NFSX_V3FH); 1834 } else { 1835 nfsm_buftombuf(mp, f, NFSX_V2FH); 1836 } 1837 } 1838 1839 int 1840 nfsm_srvsattr(struct mbuf **mp, struct vattr *va, struct mbuf *mrep, 1841 caddr_t *dposp) 1842 { 1843 struct nfsm_info info; 1844 uint32_t *tl, t1; 1845 caddr_t cp2; 1846 int error = 0; 1847 1848 info.nmi_md = *mp; 1849 info.nmi_dpos = *dposp; 1850 1851 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1852 if (*tl == nfs_true) { 1853 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1854 va->va_mode = nfstov_mode(*tl); 1855 } 1856 1857 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1858 if (*tl == nfs_true) { 1859 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1860 va->va_uid = fxdr_unsigned(uid_t, *tl); 1861 } 1862 1863 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1864 if (*tl == nfs_true) { 1865 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1866 va->va_gid = fxdr_unsigned(gid_t, *tl); 1867 } 1868 1869 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1870 if (*tl == nfs_true) { 1871 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1872 va->va_size = fxdr_hyper(tl); 1873 } 1874 1875 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1876 switch (fxdr_unsigned(int, *tl)) { 1877 case NFSV3SATTRTIME_TOCLIENT: 1878 va->va_vaflags &= ~VA_UTIMES_NULL; 1879 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1880 fxdr_nfsv3time(tl, &va->va_atime); 1881 break; 1882 case NFSV3SATTRTIME_TOSERVER: 1883 getnanotime(&va->va_atime); 1884 break; 1885 }; 1886 1887 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1888 switch (fxdr_unsigned(int, *tl)) { 1889 case NFSV3SATTRTIME_TOCLIENT: 1890 va->va_vaflags &= ~VA_UTIMES_NULL; 1891 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1892 fxdr_nfsv3time(tl, &va->va_mtime); 1893 break; 1894 case NFSV3SATTRTIME_TOSERVER: 1895 getnanotime(&va->va_mtime); 1896 break; 1897 }; 1898 1899 *dposp = info.nmi_dpos; 1900 *mp = info.nmi_md; 1901 nfsmout: 1902 return (error); 1903 } 1904