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sys/nfs/nfs_subs.c
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1 /* $OpenBSD: nfs_subs.c,v 1.146 2022/01/12 20:17:08 mbuhl 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/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 #include <sys/namei.h> 50 #include <sys/mbuf.h> 51 #include <sys/socket.h> 52 #include <sys/socketvar.h> 53 #include <sys/stat.h> 54 #include <sys/pool.h> 55 #include <sys/time.h> 56 57 #include <nfs/rpcv2.h> 58 #include <nfs/nfsproto.h> 59 #include <nfs/nfsnode.h> 60 #include <nfs/nfs.h> 61 #include <nfs/xdr_subs.h> 62 #include <nfs/nfsm_subs.h> 63 #include <nfs/nfsmount.h> 64 #include <nfs/nfs_var.h> 65 66 #include <uvm/uvm_extern.h> 67 68 #include <netinet/in.h> 69 70 #include <crypto/idgen.h> 71 72 int nfs_attrtimeo(struct nfsnode *np); 73 u_int32_t nfs_get_xid(void); 74 75 /* 76 * Data items converted to xdr at startup, since they are constant 77 * This is kinda hokey, but may save a little time doing byte swaps 78 */ 79 u_int32_t nfs_xdrneg1; 80 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 81 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted; 82 u_int32_t nfs_prog, nfs_true, nfs_false; 83 84 /* And other global data */ 85 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 86 NFCHR, NFNON }; 87 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 88 NFFIFO, NFNON }; 89 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 90 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 91 int nfs_ticks; 92 struct nfsstats nfsstats; 93 94 /* 95 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 96 */ 97 int nfsv3_procid[NFS_NPROCS] = { 98 NFSPROC_NULL, 99 NFSPROC_GETATTR, 100 NFSPROC_SETATTR, 101 NFSPROC_NOOP, 102 NFSPROC_LOOKUP, 103 NFSPROC_READLINK, 104 NFSPROC_READ, 105 NFSPROC_NOOP, 106 NFSPROC_WRITE, 107 NFSPROC_CREATE, 108 NFSPROC_REMOVE, 109 NFSPROC_RENAME, 110 NFSPROC_LINK, 111 NFSPROC_SYMLINK, 112 NFSPROC_MKDIR, 113 NFSPROC_RMDIR, 114 NFSPROC_READDIR, 115 NFSPROC_FSSTAT, 116 NFSPROC_NOOP, 117 NFSPROC_NOOP, 118 NFSPROC_NOOP, 119 NFSPROC_NOOP, 120 NFSPROC_NOOP 121 }; 122 123 /* 124 * and the reverse mapping from generic to Version 2 procedure numbers 125 */ 126 int nfsv2_procid[NFS_NPROCS] = { 127 NFSV2PROC_NULL, 128 NFSV2PROC_GETATTR, 129 NFSV2PROC_SETATTR, 130 NFSV2PROC_LOOKUP, 131 NFSV2PROC_NOOP, 132 NFSV2PROC_READLINK, 133 NFSV2PROC_READ, 134 NFSV2PROC_WRITE, 135 NFSV2PROC_CREATE, 136 NFSV2PROC_MKDIR, 137 NFSV2PROC_SYMLINK, 138 NFSV2PROC_CREATE, 139 NFSV2PROC_REMOVE, 140 NFSV2PROC_RMDIR, 141 NFSV2PROC_RENAME, 142 NFSV2PROC_LINK, 143 NFSV2PROC_READDIR, 144 NFSV2PROC_NOOP, 145 NFSV2PROC_STATFS, 146 NFSV2PROC_NOOP, 147 NFSV2PROC_NOOP, 148 NFSV2PROC_NOOP, 149 NFSV2PROC_NOOP 150 }; 151 152 /* 153 * Maps errno values to nfs error numbers. 154 * Use NFSERR_IO as the catch all for ones not specifically defined in 155 * RFC 1094. 156 */ 157 static u_char nfsrv_v2errmap[] = { 158 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 159 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 160 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 161 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 162 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 163 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 164 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 165 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 166 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 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_NAMETOL, NFSERR_IO, NFSERR_IO, 171 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE 172 /* Everything after this maps to NFSERR_IO, so far */ 173 }; 174 175 /* 176 * Maps errno values to nfs error numbers. 177 * Although it is not obvious whether or not NFS clients really care if 178 * a returned error value is in the specified list for the procedure, the 179 * safest thing to do is filter them appropriately. For Version 2, the 180 * X/Open XNFS document is the only specification that defines error values 181 * for each RPC (The RFC simply lists all possible error values for all RPCs), 182 * so I have decided to not do this for Version 2. 183 * The first entry is the default error return and the rest are the valid 184 * errors for that RPC in increasing numeric order. 185 */ 186 static short nfsv3err_null[] = { 187 0, 188 0, 189 }; 190 191 static short nfsv3err_getattr[] = { 192 NFSERR_IO, 193 NFSERR_IO, 194 NFSERR_STALE, 195 NFSERR_BADHANDLE, 196 NFSERR_SERVERFAULT, 197 0, 198 }; 199 200 static short nfsv3err_setattr[] = { 201 NFSERR_IO, 202 NFSERR_PERM, 203 NFSERR_IO, 204 NFSERR_ACCES, 205 NFSERR_INVAL, 206 NFSERR_NOSPC, 207 NFSERR_ROFS, 208 NFSERR_DQUOT, 209 NFSERR_STALE, 210 NFSERR_BADHANDLE, 211 NFSERR_NOT_SYNC, 212 NFSERR_SERVERFAULT, 213 0, 214 }; 215 216 static short nfsv3err_lookup[] = { 217 NFSERR_IO, 218 NFSERR_NOENT, 219 NFSERR_IO, 220 NFSERR_ACCES, 221 NFSERR_NOTDIR, 222 NFSERR_NAMETOL, 223 NFSERR_STALE, 224 NFSERR_BADHANDLE, 225 NFSERR_SERVERFAULT, 226 0, 227 }; 228 229 static short nfsv3err_access[] = { 230 NFSERR_IO, 231 NFSERR_IO, 232 NFSERR_STALE, 233 NFSERR_BADHANDLE, 234 NFSERR_SERVERFAULT, 235 0, 236 }; 237 238 static short nfsv3err_readlink[] = { 239 NFSERR_IO, 240 NFSERR_IO, 241 NFSERR_ACCES, 242 NFSERR_INVAL, 243 NFSERR_STALE, 244 NFSERR_BADHANDLE, 245 NFSERR_NOTSUPP, 246 NFSERR_SERVERFAULT, 247 0, 248 }; 249 250 static short nfsv3err_read[] = { 251 NFSERR_IO, 252 NFSERR_IO, 253 NFSERR_NXIO, 254 NFSERR_ACCES, 255 NFSERR_INVAL, 256 NFSERR_STALE, 257 NFSERR_BADHANDLE, 258 NFSERR_SERVERFAULT, 259 0, 260 }; 261 262 static short nfsv3err_write[] = { 263 NFSERR_IO, 264 NFSERR_IO, 265 NFSERR_ACCES, 266 NFSERR_INVAL, 267 NFSERR_FBIG, 268 NFSERR_NOSPC, 269 NFSERR_ROFS, 270 NFSERR_DQUOT, 271 NFSERR_STALE, 272 NFSERR_BADHANDLE, 273 NFSERR_SERVERFAULT, 274 0, 275 }; 276 277 static short nfsv3err_create[] = { 278 NFSERR_IO, 279 NFSERR_IO, 280 NFSERR_ACCES, 281 NFSERR_EXIST, 282 NFSERR_NOTDIR, 283 NFSERR_NOSPC, 284 NFSERR_ROFS, 285 NFSERR_NAMETOL, 286 NFSERR_DQUOT, 287 NFSERR_STALE, 288 NFSERR_BADHANDLE, 289 NFSERR_NOTSUPP, 290 NFSERR_SERVERFAULT, 291 0, 292 }; 293 294 static short nfsv3err_mkdir[] = { 295 NFSERR_IO, 296 NFSERR_IO, 297 NFSERR_ACCES, 298 NFSERR_EXIST, 299 NFSERR_NOTDIR, 300 NFSERR_NOSPC, 301 NFSERR_ROFS, 302 NFSERR_NAMETOL, 303 NFSERR_DQUOT, 304 NFSERR_STALE, 305 NFSERR_BADHANDLE, 306 NFSERR_NOTSUPP, 307 NFSERR_SERVERFAULT, 308 0, 309 }; 310 311 static short nfsv3err_symlink[] = { 312 NFSERR_IO, 313 NFSERR_IO, 314 NFSERR_ACCES, 315 NFSERR_EXIST, 316 NFSERR_NOTDIR, 317 NFSERR_NOSPC, 318 NFSERR_ROFS, 319 NFSERR_NAMETOL, 320 NFSERR_DQUOT, 321 NFSERR_STALE, 322 NFSERR_BADHANDLE, 323 NFSERR_NOTSUPP, 324 NFSERR_SERVERFAULT, 325 0, 326 }; 327 328 static short nfsv3err_mknod[] = { 329 NFSERR_IO, 330 NFSERR_IO, 331 NFSERR_ACCES, 332 NFSERR_EXIST, 333 NFSERR_NOTDIR, 334 NFSERR_NOSPC, 335 NFSERR_ROFS, 336 NFSERR_NAMETOL, 337 NFSERR_DQUOT, 338 NFSERR_STALE, 339 NFSERR_BADHANDLE, 340 NFSERR_NOTSUPP, 341 NFSERR_SERVERFAULT, 342 NFSERR_BADTYPE, 343 0, 344 }; 345 346 static short nfsv3err_remove[] = { 347 NFSERR_IO, 348 NFSERR_NOENT, 349 NFSERR_IO, 350 NFSERR_ACCES, 351 NFSERR_NOTDIR, 352 NFSERR_ROFS, 353 NFSERR_NAMETOL, 354 NFSERR_STALE, 355 NFSERR_BADHANDLE, 356 NFSERR_SERVERFAULT, 357 0, 358 }; 359 360 static short nfsv3err_rmdir[] = { 361 NFSERR_IO, 362 NFSERR_NOENT, 363 NFSERR_IO, 364 NFSERR_ACCES, 365 NFSERR_EXIST, 366 NFSERR_NOTDIR, 367 NFSERR_INVAL, 368 NFSERR_ROFS, 369 NFSERR_NAMETOL, 370 NFSERR_NOTEMPTY, 371 NFSERR_STALE, 372 NFSERR_BADHANDLE, 373 NFSERR_NOTSUPP, 374 NFSERR_SERVERFAULT, 375 0, 376 }; 377 378 static short nfsv3err_rename[] = { 379 NFSERR_IO, 380 NFSERR_NOENT, 381 NFSERR_IO, 382 NFSERR_ACCES, 383 NFSERR_EXIST, 384 NFSERR_XDEV, 385 NFSERR_NOTDIR, 386 NFSERR_ISDIR, 387 NFSERR_INVAL, 388 NFSERR_NOSPC, 389 NFSERR_ROFS, 390 NFSERR_MLINK, 391 NFSERR_NAMETOL, 392 NFSERR_NOTEMPTY, 393 NFSERR_DQUOT, 394 NFSERR_STALE, 395 NFSERR_BADHANDLE, 396 NFSERR_NOTSUPP, 397 NFSERR_SERVERFAULT, 398 0, 399 }; 400 401 static short nfsv3err_link[] = { 402 NFSERR_IO, 403 NFSERR_IO, 404 NFSERR_ACCES, 405 NFSERR_EXIST, 406 NFSERR_XDEV, 407 NFSERR_NOTDIR, 408 NFSERR_INVAL, 409 NFSERR_NOSPC, 410 NFSERR_ROFS, 411 NFSERR_MLINK, 412 NFSERR_NAMETOL, 413 NFSERR_DQUOT, 414 NFSERR_STALE, 415 NFSERR_BADHANDLE, 416 NFSERR_NOTSUPP, 417 NFSERR_SERVERFAULT, 418 0, 419 }; 420 421 static short nfsv3err_readdir[] = { 422 NFSERR_IO, 423 NFSERR_IO, 424 NFSERR_ACCES, 425 NFSERR_NOTDIR, 426 NFSERR_STALE, 427 NFSERR_BADHANDLE, 428 NFSERR_BAD_COOKIE, 429 NFSERR_TOOSMALL, 430 NFSERR_SERVERFAULT, 431 0, 432 }; 433 434 static short nfsv3err_readdirplus[] = { 435 NFSERR_IO, 436 NFSERR_IO, 437 NFSERR_ACCES, 438 NFSERR_NOTDIR, 439 NFSERR_STALE, 440 NFSERR_BADHANDLE, 441 NFSERR_BAD_COOKIE, 442 NFSERR_NOTSUPP, 443 NFSERR_TOOSMALL, 444 NFSERR_SERVERFAULT, 445 0, 446 }; 447 448 static short nfsv3err_fsstat[] = { 449 NFSERR_IO, 450 NFSERR_IO, 451 NFSERR_STALE, 452 NFSERR_BADHANDLE, 453 NFSERR_SERVERFAULT, 454 0, 455 }; 456 457 static short nfsv3err_fsinfo[] = { 458 NFSERR_STALE, 459 NFSERR_STALE, 460 NFSERR_BADHANDLE, 461 NFSERR_SERVERFAULT, 462 0, 463 }; 464 465 static short nfsv3err_pathconf[] = { 466 NFSERR_STALE, 467 NFSERR_STALE, 468 NFSERR_BADHANDLE, 469 NFSERR_SERVERFAULT, 470 0, 471 }; 472 473 static short nfsv3err_commit[] = { 474 NFSERR_IO, 475 NFSERR_IO, 476 NFSERR_STALE, 477 NFSERR_BADHANDLE, 478 NFSERR_SERVERFAULT, 479 0, 480 }; 481 482 static short *nfsrv_v3errmap[] = { 483 nfsv3err_null, 484 nfsv3err_getattr, 485 nfsv3err_setattr, 486 nfsv3err_lookup, 487 nfsv3err_access, 488 nfsv3err_readlink, 489 nfsv3err_read, 490 nfsv3err_write, 491 nfsv3err_create, 492 nfsv3err_mkdir, 493 nfsv3err_symlink, 494 nfsv3err_mknod, 495 nfsv3err_remove, 496 nfsv3err_rmdir, 497 nfsv3err_rename, 498 nfsv3err_link, 499 nfsv3err_readdir, 500 nfsv3err_readdirplus, 501 nfsv3err_fsstat, 502 nfsv3err_fsinfo, 503 nfsv3err_pathconf, 504 nfsv3err_commit, 505 }; 506 507 struct pool nfsreqpl; 508 509 /* 510 * Create the header for an rpc request packet 511 * The hsiz is the size of the rest of the nfs request header. 512 * (just used to decide if a cluster is a good idea) 513 */ 514 struct mbuf * 515 nfsm_reqhead(int hsiz) 516 { 517 struct mbuf *mb; 518 519 MGET(mb, M_WAIT, MT_DATA); 520 if (hsiz > MLEN) 521 MCLGET(mb, M_WAIT); 522 mb->m_len = 0; 523 524 /* Finally, return values */ 525 return (mb); 526 } 527 528 /* 529 * Return an unpredictable XID in XDR form. 530 */ 531 u_int32_t 532 nfs_get_xid(void) 533 { 534 static struct idgen32_ctx nfs_xid_ctx; 535 static int called = 0; 536 537 if (!called) { 538 called = 1; 539 idgen32_init(&nfs_xid_ctx); 540 } 541 return (txdr_unsigned(idgen32(&nfs_xid_ctx))); 542 } 543 544 /* 545 * Build the RPC header and fill in the authorization info. 546 * Right now we are pretty centric around RPCAUTH_UNIX, in the 547 * future, this function will need some love to be able to handle 548 * other authorization methods, such as Kerberos. 549 */ 550 void 551 nfsm_rpchead(struct nfsreq *req, struct ucred *cr, int auth_type) 552 { 553 struct mbuf *mb; 554 u_int32_t *tl; 555 int i, authsiz, auth_len, ngroups; 556 557 KASSERT(auth_type == RPCAUTH_UNIX); 558 559 /* 560 * RPCAUTH_UNIX fits in an hdr mbuf, in the future other 561 * authorization methods need to figure out their own sizes 562 * and allocate and chain mbufs accordingly. 563 */ 564 mb = req->r_mreq; 565 566 /* 567 * We need to start out by finding how big the authorization cred 568 * and verifer are for the auth_type, to be able to correctly 569 * align the mbuf header/chain. 570 */ 571 switch (auth_type) { 572 case RPCAUTH_UNIX: 573 /* 574 * In the RPCAUTH_UNIX case, the size is the static 575 * part as shown in RFC1831 + the number of groups, 576 * RPCAUTH_UNIX has a zero verifer. 577 */ 578 if (cr->cr_ngroups > req->r_nmp->nm_numgrps) 579 ngroups = req->r_nmp->nm_numgrps; 580 else 581 ngroups = cr->cr_ngroups; 582 583 auth_len = (ngroups << 2) + 5 * NFSX_UNSIGNED; 584 authsiz = nfsm_rndup(auth_len); 585 /* The authorization size + the size of the static part */ 586 m_align(mb, authsiz + 10 * NFSX_UNSIGNED); 587 break; 588 } 589 590 mb->m_len = 0; 591 592 /* First the RPC header. */ 593 tl = nfsm_build(&mb, 6 * NFSX_UNSIGNED); 594 595 /* Get a new (non-zero) xid */ 596 *tl++ = req->r_xid = nfs_get_xid(); 597 *tl++ = rpc_call; 598 *tl++ = rpc_vers; 599 *tl++ = nfs_prog; 600 if (ISSET(req->r_nmp->nm_flag, NFSMNT_NFSV3)) { 601 *tl++ = txdr_unsigned(NFS_VER3); 602 *tl = txdr_unsigned(req->r_procnum); 603 } else { 604 *tl++ = txdr_unsigned(NFS_VER2); 605 *tl = txdr_unsigned(nfsv2_procid[req->r_procnum]); 606 } 607 608 /* The Authorization cred and its verifier */ 609 switch (auth_type) { 610 case RPCAUTH_UNIX: 611 tl = nfsm_build(&mb, auth_len + 4 * NFSX_UNSIGNED); 612 *tl++ = txdr_unsigned(RPCAUTH_UNIX); 613 *tl++ = txdr_unsigned(authsiz); 614 615 /* The authorization cred */ 616 *tl++ = 0; /* stamp */ 617 *tl++ = 0; /* NULL hostname */ 618 *tl++ = txdr_unsigned(cr->cr_uid); 619 *tl++ = txdr_unsigned(cr->cr_gid); 620 *tl++ = txdr_unsigned(ngroups); 621 for (i = 0; i < ngroups; i++) 622 *tl++ = txdr_unsigned(cr->cr_groups[i]); 623 /* The authorization verifier */ 624 *tl++ = txdr_unsigned(RPCAUTH_NULL); 625 *tl = 0; 626 break; 627 } 628 629 mb->m_pkthdr.len += authsiz + 10 * NFSX_UNSIGNED; 630 mb->m_pkthdr.ph_ifidx = 0; 631 } 632 633 /* 634 * copies mbuf chain to the uio scatter/gather list 635 */ 636 int 637 nfsm_mbuftouio(struct mbuf **mrep, struct uio *uiop, int siz, caddr_t *dpos) 638 { 639 char *mbufcp, *uiocp; 640 int xfer, left, len; 641 struct mbuf *mp; 642 long uiosiz, rem; 643 int error = 0; 644 645 mp = *mrep; 646 mbufcp = *dpos; 647 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 648 rem = nfsm_padlen(siz); 649 while (siz > 0) { 650 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 651 return (EFBIG); 652 left = uiop->uio_iov->iov_len; 653 uiocp = uiop->uio_iov->iov_base; 654 if (left > siz) 655 left = siz; 656 uiosiz = left; 657 while (left > 0) { 658 while (len == 0) { 659 mp = mp->m_next; 660 if (mp == NULL) 661 return (EBADRPC); 662 mbufcp = mtod(mp, caddr_t); 663 len = mp->m_len; 664 } 665 xfer = (left > len) ? len : left; 666 if (uiop->uio_segflg == UIO_SYSSPACE) 667 memcpy(uiocp, mbufcp, xfer); 668 else 669 copyout(mbufcp, uiocp, xfer); 670 left -= xfer; 671 len -= xfer; 672 mbufcp += xfer; 673 uiocp += xfer; 674 uiop->uio_offset += xfer; 675 uiop->uio_resid -= xfer; 676 } 677 if (uiop->uio_iov->iov_len <= siz) { 678 uiop->uio_iovcnt--; 679 uiop->uio_iov++; 680 } else { 681 uiop->uio_iov->iov_base = 682 (char *)uiop->uio_iov->iov_base + uiosiz; 683 uiop->uio_iov->iov_len -= uiosiz; 684 } 685 siz -= uiosiz; 686 } 687 *dpos = mbufcp; 688 *mrep = mp; 689 if (rem > 0) { 690 if (len < rem) 691 error = nfs_adv(mrep, dpos, rem, len); 692 else 693 *dpos += rem; 694 } 695 return (error); 696 } 697 698 /* 699 * Copy a uio scatter/gather list to an mbuf chain. 700 */ 701 void 702 nfsm_uiotombuf(struct mbuf **mp, struct uio *uiop, size_t len) 703 { 704 struct mbuf *mb, *mb2; 705 size_t xfer, pad; 706 707 mb = *mp; 708 709 pad = nfsm_padlen(len); 710 711 /* XXX -- the following should be done by the caller */ 712 uiop->uio_resid = len; 713 uiop->uio_rw = UIO_WRITE; 714 715 while (len) { 716 xfer = ulmin(len, m_trailingspace(mb)); 717 uiomove(mb_offset(mb), xfer, uiop); 718 mb->m_len += xfer; 719 len -= xfer; 720 if (len > 0) { 721 MGET(mb2, M_WAIT, MT_DATA); 722 if (len > MLEN) 723 MCLGET(mb2, M_WAIT); 724 mb2->m_len = 0; 725 mb->m_next = mb2; 726 mb = mb2; 727 } 728 } 729 730 if (pad > 0) { 731 if (pad > m_trailingspace(mb)) { 732 MGET(mb2, M_WAIT, MT_DATA); 733 mb2->m_len = 0; 734 mb->m_next = mb2; 735 mb = mb2; 736 } 737 memset(mb_offset(mb), 0, pad); 738 mb->m_len += pad; 739 } 740 741 *mp = mb; 742 } 743 744 /* 745 * Copy a buffer to an mbuf chain 746 */ 747 void 748 nfsm_buftombuf(struct mbuf **mp, void *buf, size_t len) 749 { 750 struct iovec iov; 751 struct uio io; 752 753 iov.iov_base = buf; 754 iov.iov_len = len; 755 756 io.uio_iov = &iov; 757 io.uio_iovcnt = 1; 758 io.uio_resid = len; 759 io.uio_segflg = UIO_SYSSPACE; 760 io.uio_rw = UIO_WRITE; 761 762 nfsm_uiotombuf(mp, &io, len); 763 } 764 765 /* 766 * Copy a string to an mbuf chain 767 */ 768 void 769 nfsm_strtombuf(struct mbuf **mp, void *str, size_t len) 770 { 771 struct iovec iov[2]; 772 struct uio io; 773 uint32_t strlen; 774 775 strlen = txdr_unsigned(len); 776 777 iov[0].iov_base = &strlen; 778 iov[0].iov_len = sizeof(uint32_t); 779 iov[1].iov_base = str; 780 iov[1].iov_len = len; 781 782 io.uio_iov = iov; 783 io.uio_iovcnt = 2; 784 io.uio_resid = sizeof(uint32_t) + len; 785 io.uio_segflg = UIO_SYSSPACE; 786 io.uio_rw = UIO_WRITE; 787 788 nfsm_uiotombuf(mp, &io, io.uio_resid); 789 } 790 791 /* 792 * Help break down an mbuf chain by setting the first siz bytes contiguous 793 * pointed to by returned val. 794 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 795 * cases. (The macros use the vars. dpos and dpos2) 796 */ 797 int 798 nfsm_disct(struct mbuf **mdp, caddr_t *dposp, int siz, int left, caddr_t *cp2) 799 { 800 struct mbuf *mp, *mp2; 801 int siz2, xfer; 802 caddr_t p; 803 804 mp = *mdp; 805 while (left == 0) { 806 *mdp = mp = mp->m_next; 807 if (mp == NULL) 808 return (EBADRPC); 809 left = mp->m_len; 810 *dposp = mtod(mp, caddr_t); 811 } 812 if (left >= siz) { 813 *cp2 = *dposp; 814 *dposp += siz; 815 } else if (mp->m_next == NULL) { 816 return (EBADRPC); 817 } else if (siz > MHLEN) { 818 panic("nfs S too big"); 819 } else { 820 MGET(mp2, M_WAIT, MT_DATA); 821 mp2->m_next = mp->m_next; 822 mp->m_next = mp2; 823 mp->m_len -= left; 824 mp = mp2; 825 *cp2 = p = mtod(mp, caddr_t); 826 bcopy(*dposp, p, left); /* Copy what was left */ 827 siz2 = siz-left; 828 p += left; 829 mp2 = mp->m_next; 830 /* Loop around copying up the siz2 bytes */ 831 while (siz2 > 0) { 832 if (mp2 == NULL) 833 return (EBADRPC); 834 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 835 if (xfer > 0) { 836 bcopy(mtod(mp2, caddr_t), p, xfer); 837 mp2->m_data += xfer; 838 mp2->m_len -= xfer; 839 p += xfer; 840 siz2 -= xfer; 841 } 842 if (siz2 > 0) 843 mp2 = mp2->m_next; 844 } 845 mp->m_len = siz; 846 *mdp = mp2; 847 *dposp = mtod(mp2, caddr_t); 848 } 849 return (0); 850 } 851 852 /* 853 * Advance the position in the mbuf chain. 854 */ 855 int 856 nfs_adv(struct mbuf **mdp, caddr_t *dposp, int offs, int left) 857 { 858 struct mbuf *m; 859 int s; 860 861 m = *mdp; 862 s = left; 863 while (s < offs) { 864 offs -= s; 865 m = m->m_next; 866 if (m == NULL) 867 return (EBADRPC); 868 s = m->m_len; 869 } 870 *mdp = m; 871 *dposp = mtod(m, caddr_t)+offs; 872 return (0); 873 } 874 875 /* 876 * Called once to initialize data structures... 877 */ 878 void 879 nfs_init(void) 880 { 881 rpc_vers = txdr_unsigned(RPC_VER2); 882 rpc_call = txdr_unsigned(RPC_CALL); 883 rpc_reply = txdr_unsigned(RPC_REPLY); 884 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 885 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 886 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 887 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 888 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 889 nfs_prog = txdr_unsigned(NFS_PROG); 890 nfs_true = txdr_unsigned(1); 891 nfs_false = txdr_unsigned(0); 892 nfs_xdrneg1 = txdr_unsigned(-1); 893 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 894 if (nfs_ticks < 1) 895 nfs_ticks = 1; 896 #ifdef NFSSERVER 897 nfsrv_init(0); /* Init server data structures */ 898 nfsrv_initcache(); /* Init the server request cache */ 899 #endif /* NFSSERVER */ 900 901 pool_init(&nfsreqpl, sizeof(struct nfsreq), 0, IPL_NONE, PR_WAITOK, 902 "nfsreqpl", NULL); 903 } 904 905 #ifdef NFSCLIENT 906 int 907 nfs_vfs_init(struct vfsconf *vfsp) 908 { 909 extern struct pool nfs_node_pool; 910 911 TAILQ_INIT(&nfs_bufq); 912 913 pool_init(&nfs_node_pool, sizeof(struct nfsnode), 0, IPL_NONE, 914 PR_WAITOK, "nfsnodepl", NULL); 915 916 return (0); 917 } 918 919 /* 920 * Attribute cache routines. 921 * nfs_loadattrcache() - loads or updates the cache contents from attributes 922 * that are on the mbuf list 923 * nfs_getattrcache() - returns valid attributes if found in cache, returns 924 * error otherwise 925 */ 926 927 /* 928 * Load the attribute cache (that lives in the nfsnode entry) with 929 * the values on the mbuf list and 930 * Iff vap not NULL 931 * copy the attributes to *vaper 932 */ 933 int 934 nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp, 935 struct vattr *vaper) 936 { 937 struct vnode *vp = *vpp; 938 struct vattr *vap; 939 struct nfs_fattr *fp; 940 extern const struct vops nfs_specvops; 941 struct nfsnode *np; 942 int32_t t1; 943 caddr_t cp2; 944 int error = 0; 945 int32_t rdev; 946 struct mbuf *md; 947 enum vtype vtyp; 948 mode_t vmode; 949 struct timespec mtime; 950 struct vnode *nvp; 951 int v3 = NFS_ISV3(vp); 952 uid_t uid; 953 gid_t gid; 954 955 md = *mdp; 956 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 957 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 958 if (error) 959 return (error); 960 fp = (struct nfs_fattr *)cp2; 961 if (v3) { 962 vtyp = nfsv3tov_type(fp->fa_type); 963 vmode = fxdr_unsigned(mode_t, fp->fa_mode); 964 rdev = makedev(fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata1), 965 fxdr_unsigned(u_int32_t, fp->fa3_rdev.specdata2)); 966 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 967 } else { 968 vtyp = nfsv2tov_type(fp->fa_type); 969 vmode = fxdr_unsigned(mode_t, fp->fa_mode); 970 if (vtyp == VNON || vtyp == VREG) 971 vtyp = IFTOVT(vmode); 972 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 973 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 974 975 /* 976 * Really ugly NFSv2 kludge. 977 */ 978 if (vtyp == VCHR && rdev == 0xffffffff) 979 vtyp = VFIFO; 980 } 981 982 /* 983 * If v_type == VNON it is a new node, so fill in the v_type, 984 * n_mtime fields. Check to see if it represents a special 985 * device, and if so, check for a possible alias. Once the 986 * correct vnode has been obtained, fill in the rest of the 987 * information. 988 */ 989 np = VTONFS(vp); 990 if (vp->v_type != vtyp) { 991 cache_purge(vp); 992 vp->v_type = vtyp; 993 if (vp->v_type == VFIFO) { 994 #ifndef FIFO 995 return (EOPNOTSUPP); 996 #else 997 extern const struct vops nfs_fifovops; 998 vp->v_op = &nfs_fifovops; 999 #endif /* FIFO */ 1000 } 1001 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1002 vp->v_op = &nfs_specvops; 1003 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1004 if (nvp) { 1005 /* 1006 * Discard unneeded vnode, but save its nfsnode. 1007 * Since the nfsnode does not have a lock, its 1008 * vnode lock has to be carried over. 1009 */ 1010 1011 nvp->v_data = vp->v_data; 1012 vp->v_data = NULL; 1013 vp->v_op = &spec_vops; 1014 vrele(vp); 1015 vgone(vp); 1016 /* 1017 * Reinitialize aliased node. 1018 */ 1019 np->n_vnode = nvp; 1020 *vpp = vp = nvp; 1021 } 1022 } 1023 np->n_mtime = mtime; 1024 } 1025 vap = &np->n_vattr; 1026 vap->va_type = vtyp; 1027 vap->va_rdev = (dev_t)rdev; 1028 vap->va_mtime = mtime; 1029 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1030 1031 uid = fxdr_unsigned(uid_t, fp->fa_uid); 1032 gid = fxdr_unsigned(gid_t, fp->fa_gid); 1033 /* Invalidate access cache if uid, gid or mode changed. */ 1034 if (np->n_accstamp != -1 && 1035 (gid != vap->va_gid || uid != vap->va_uid || 1036 (vmode & 07777) != vap->va_mode)) 1037 np->n_accstamp = -1; 1038 1039 vap->va_mode = (vmode & 07777); 1040 1041 switch (vtyp) { 1042 case VBLK: 1043 vap->va_blocksize = BLKDEV_IOSIZE; 1044 break; 1045 case VCHR: 1046 vap->va_blocksize = MAXBSIZE; 1047 break; 1048 default: 1049 vap->va_blocksize = v3 ? vp->v_mount->mnt_stat.f_iosize : 1050 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1051 break; 1052 } 1053 if (v3) { 1054 vap->va_nlink = fxdr_unsigned(nlink_t, fp->fa_nlink); 1055 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1056 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1057 vap->va_size = fxdr_hyper(&fp->fa3_size); 1058 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1059 vap->va_fileid = fxdr_hyper(&fp->fa3_fileid); 1060 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1061 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1062 vap->va_flags = 0; 1063 vap->va_filerev = 0; 1064 } else { 1065 vap->va_nlink = fxdr_unsigned(nlink_t, fp->fa_nlink); 1066 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1067 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1068 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1069 vap->va_bytes = 1070 (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) * 1071 NFS_FABLKSIZE; 1072 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1073 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1074 vap->va_flags = 0; 1075 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1076 fp->fa2_ctime.nfsv2_sec); 1077 vap->va_ctime.tv_nsec = 0; 1078 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1079 vap->va_filerev = 0; 1080 } 1081 1082 if (vap->va_size != np->n_size) { 1083 if (vap->va_type == VREG) { 1084 if (np->n_flag & NMODIFIED) { 1085 if (vap->va_size < np->n_size) 1086 vap->va_size = np->n_size; 1087 else 1088 np->n_size = vap->va_size; 1089 } else 1090 np->n_size = vap->va_size; 1091 uvm_vnp_setsize(vp, np->n_size); 1092 } else 1093 np->n_size = vap->va_size; 1094 } 1095 np->n_attrstamp = gettime(); 1096 if (vaper != NULL) { 1097 bcopy(vap, vaper, sizeof(*vap)); 1098 if (np->n_flag & NCHG) { 1099 if (np->n_flag & NACC) 1100 vaper->va_atime = np->n_atim; 1101 if (np->n_flag & NUPD) 1102 vaper->va_mtime = np->n_mtim; 1103 } 1104 } 1105 return (0); 1106 } 1107 1108 int 1109 nfs_attrtimeo(struct nfsnode *np) 1110 { 1111 struct vnode *vp = np->n_vnode; 1112 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1113 int tenthage = (gettime() - np->n_mtime.tv_sec) / 10; 1114 int minto, maxto; 1115 1116 if (vp->v_type == VDIR) { 1117 maxto = nmp->nm_acdirmax; 1118 minto = nmp->nm_acdirmin; 1119 } 1120 else { 1121 maxto = nmp->nm_acregmax; 1122 minto = nmp->nm_acregmin; 1123 } 1124 1125 if (np->n_flag & NMODIFIED || tenthage < minto) 1126 return minto; 1127 else if (tenthage < maxto) 1128 return tenthage; 1129 else 1130 return maxto; 1131 } 1132 1133 /* 1134 * Check the time stamp 1135 * If the cache is valid, copy contents to *vap and return 0 1136 * otherwise return an error 1137 */ 1138 int 1139 nfs_getattrcache(struct vnode *vp, struct vattr *vaper) 1140 { 1141 struct nfsnode *np = VTONFS(vp); 1142 struct vattr *vap; 1143 1144 if (np->n_attrstamp == 0 || 1145 (gettime() - np->n_attrstamp) >= nfs_attrtimeo(np)) { 1146 nfsstats.attrcache_misses++; 1147 return (ENOENT); 1148 } 1149 nfsstats.attrcache_hits++; 1150 vap = &np->n_vattr; 1151 if (vap->va_size != np->n_size) { 1152 if (vap->va_type == VREG) { 1153 if (np->n_flag & NMODIFIED) { 1154 if (vap->va_size < np->n_size) 1155 vap->va_size = np->n_size; 1156 else 1157 np->n_size = vap->va_size; 1158 } else 1159 np->n_size = vap->va_size; 1160 uvm_vnp_setsize(vp, np->n_size); 1161 } else 1162 np->n_size = vap->va_size; 1163 } 1164 bcopy(vap, vaper, sizeof(struct vattr)); 1165 if (np->n_flag & NCHG) { 1166 if (np->n_flag & NACC) 1167 vaper->va_atime = np->n_atim; 1168 if (np->n_flag & NUPD) 1169 vaper->va_mtime = np->n_mtim; 1170 } 1171 return (0); 1172 } 1173 #endif /* NFSCLIENT */ 1174 1175 /* 1176 * Set up nameidata for a lookup() call and do it 1177 */ 1178 int 1179 nfs_namei(struct nameidata *ndp, fhandle_t *fhp, int len, 1180 struct nfssvc_sock *slp, struct mbuf *nam, struct mbuf **mdp, 1181 caddr_t *dposp, struct vnode **retdirp, struct proc *p) 1182 { 1183 int i, rem; 1184 struct mbuf *md; 1185 char *fromcp, *tocp; 1186 struct vnode *dp; 1187 int error, rdonly; 1188 struct componentname *cnp = &ndp->ni_cnd; 1189 1190 *retdirp = NULL; 1191 cnp->cn_pnbuf = pool_get(&namei_pool, PR_WAITOK); 1192 /* 1193 * Copy the name from the mbuf list to ndp->ni_pnbuf 1194 * and set the various ndp fields appropriately. 1195 */ 1196 fromcp = *dposp; 1197 tocp = cnp->cn_pnbuf; 1198 md = *mdp; 1199 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1200 for (i = 0; i < len; i++) { 1201 while (rem == 0) { 1202 md = md->m_next; 1203 if (md == NULL) { 1204 error = EBADRPC; 1205 goto out; 1206 } 1207 fromcp = mtod(md, caddr_t); 1208 rem = md->m_len; 1209 } 1210 if (*fromcp == '\0' || *fromcp == '/') { 1211 error = EACCES; 1212 goto out; 1213 } 1214 *tocp++ = *fromcp++; 1215 rem--; 1216 } 1217 *tocp = '\0'; 1218 *mdp = md; 1219 *dposp = fromcp; 1220 len = nfsm_padlen(len); 1221 if (len > 0) { 1222 if (rem >= len) 1223 *dposp += len; 1224 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1225 goto out; 1226 } 1227 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1228 cnp->cn_nameptr = cnp->cn_pnbuf; 1229 /* 1230 * Extract and set starting directory. 1231 */ 1232 error = nfsrv_fhtovp(fhp, 0, &dp, ndp->ni_cnd.cn_cred, slp, 1233 nam, &rdonly); 1234 if (error) 1235 goto out; 1236 if (dp->v_type != VDIR) { 1237 vrele(dp); 1238 error = ENOTDIR; 1239 goto out; 1240 } 1241 vref(dp); 1242 *retdirp = dp; 1243 ndp->ni_startdir = dp; 1244 if (rdonly) 1245 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1246 else 1247 cnp->cn_flags |= NOCROSSMOUNT; 1248 1249 /* 1250 * And call lookup() to do the real work 1251 */ 1252 cnp->cn_proc = p; 1253 error = vfs_lookup(ndp); 1254 if (error) 1255 goto out; 1256 /* 1257 * Check for encountering a symbolic link 1258 */ 1259 if (cnp->cn_flags & ISSYMLINK) { 1260 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1261 vput(ndp->ni_dvp); 1262 else 1263 vrele(ndp->ni_dvp); 1264 vput(ndp->ni_vp); 1265 ndp->ni_vp = NULL; 1266 error = EINVAL; 1267 goto out; 1268 } 1269 /* 1270 * Check for saved name request 1271 */ 1272 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1273 cnp->cn_flags |= HASBUF; 1274 return (0); 1275 } 1276 out: 1277 pool_put(&namei_pool, cnp->cn_pnbuf); 1278 return (error); 1279 } 1280 1281 /* 1282 * A fiddled version of m_adj() that ensures null fill to a long 1283 * boundary and only trims off the back end 1284 */ 1285 void 1286 nfsm_adj(struct mbuf *mp, int len, int nul) 1287 { 1288 struct mbuf *m; 1289 int count, i; 1290 char *cp; 1291 1292 /* 1293 * Trim from tail. Scan the mbuf chain, 1294 * calculating its length and finding the last mbuf. 1295 * If the adjustment only affects this mbuf, then just 1296 * adjust and return. Otherwise, rescan and truncate 1297 * after the remaining size. 1298 */ 1299 count = 0; 1300 m = mp; 1301 for (;;) { 1302 count += m->m_len; 1303 if (m->m_next == NULL) 1304 break; 1305 m = m->m_next; 1306 } 1307 if (m->m_len > len) { 1308 m->m_len -= len; 1309 if (nul > 0) { 1310 cp = mtod(m, caddr_t)+m->m_len-nul; 1311 for (i = 0; i < nul; i++) 1312 *cp++ = '\0'; 1313 } 1314 return; 1315 } 1316 count -= len; 1317 if (count < 0) 1318 count = 0; 1319 /* 1320 * Correct length for chain is "count". 1321 * Find the mbuf with last data, adjust its length, 1322 * and toss data from remaining mbufs on chain. 1323 */ 1324 for (m = mp; m; m = m->m_next) { 1325 if (m->m_len >= count) { 1326 m->m_len = count; 1327 if (nul > 0) { 1328 cp = mtod(m, caddr_t)+m->m_len-nul; 1329 for (i = 0; i < nul; i++) 1330 *cp++ = '\0'; 1331 } 1332 break; 1333 } 1334 count -= m->m_len; 1335 } 1336 for (m = m->m_next;m;m = m->m_next) 1337 m->m_len = 0; 1338 } 1339 1340 /* 1341 * Make these functions instead of macros, so that the kernel text size 1342 * doesn't get too big... 1343 */ 1344 void 1345 nfsm_srvwcc(struct nfsrv_descript *nfsd, int before_ret, 1346 struct vattr *before_vap, int after_ret, struct vattr *after_vap, 1347 struct nfsm_info *info) 1348 { 1349 u_int32_t *tl; 1350 1351 if (before_ret) { 1352 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED); 1353 *tl = nfs_false; 1354 } else { 1355 tl = nfsm_build(&info->nmi_mb, 7 * NFSX_UNSIGNED); 1356 *tl++ = nfs_true; 1357 txdr_hyper(before_vap->va_size, tl); 1358 tl += 2; 1359 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1360 tl += 2; 1361 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1362 } 1363 nfsm_srvpostop_attr(nfsd, after_ret, after_vap, info); 1364 } 1365 1366 void 1367 nfsm_srvpostop_attr(struct nfsrv_descript *nfsd, int after_ret, 1368 struct vattr *after_vap, struct nfsm_info *info) 1369 { 1370 u_int32_t *tl; 1371 struct nfs_fattr *fp; 1372 1373 if (after_ret) { 1374 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED); 1375 *tl = nfs_false; 1376 } else { 1377 tl = nfsm_build(&info->nmi_mb, NFSX_UNSIGNED + NFSX_V3FATTR); 1378 *tl++ = nfs_true; 1379 fp = (struct nfs_fattr *)tl; 1380 nfsm_srvfattr(nfsd, after_vap, fp); 1381 } 1382 } 1383 1384 void 1385 nfsm_srvfattr(struct nfsrv_descript *nfsd, struct vattr *vap, 1386 struct nfs_fattr *fp) 1387 { 1388 1389 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1390 fp->fa_uid = txdr_unsigned(vap->va_uid); 1391 fp->fa_gid = txdr_unsigned(vap->va_gid); 1392 if (nfsd->nd_flag & ND_NFSV3) { 1393 fp->fa_type = vtonfsv3_type(vap->va_type); 1394 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1395 txdr_hyper(vap->va_size, &fp->fa3_size); 1396 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1397 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1398 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1399 fp->fa3_fsid.nfsuquad[0] = 0; 1400 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1401 txdr_hyper(vap->va_fileid, &fp->fa3_fileid); 1402 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1403 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1404 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1405 } else { 1406 fp->fa_type = vtonfsv2_type(vap->va_type); 1407 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1408 fp->fa2_size = txdr_unsigned(vap->va_size); 1409 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1410 if (vap->va_type == VFIFO) 1411 fp->fa2_rdev = 0xffffffff; 1412 else 1413 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1414 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1415 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1416 fp->fa2_fileid = txdr_unsigned((u_int32_t)vap->va_fileid); 1417 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1418 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1419 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1420 } 1421 } 1422 1423 /* 1424 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1425 * - look up fsid in mount list (if not found ret error) 1426 * - get vp and export rights by calling VFS_FHTOVP() and VFS_CHECKEXP() 1427 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1428 * - if not lockflag unlock it with VOP_UNLOCK() 1429 */ 1430 int 1431 nfsrv_fhtovp(fhandle_t *fhp, int lockflag, struct vnode **vpp, 1432 struct ucred *cred, struct nfssvc_sock *slp, struct mbuf *nam, 1433 int *rdonlyp) 1434 { 1435 struct mount *mp; 1436 int i; 1437 struct ucred *credanon; 1438 int error, exflags; 1439 struct sockaddr_in *saddr; 1440 1441 *vpp = NULL; 1442 mp = vfs_getvfs(&fhp->fh_fsid); 1443 1444 if (!mp) 1445 return (ESTALE); 1446 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1447 if (error) 1448 return (error); 1449 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1450 if (error) 1451 return (error); 1452 1453 saddr = mtod(nam, struct sockaddr_in *); 1454 if (saddr->sin_family == AF_INET && 1455 (ntohs(saddr->sin_port) >= IPPORT_RESERVED || 1456 (slp->ns_so->so_type == SOCK_STREAM && ntohs(saddr->sin_port) == 20))) { 1457 vput(*vpp); 1458 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1459 } 1460 1461 /* Check/setup credentials. */ 1462 if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1463 cred->cr_uid = credanon->cr_uid; 1464 cred->cr_gid = credanon->cr_gid; 1465 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS_MAX; i++) 1466 cred->cr_groups[i] = credanon->cr_groups[i]; 1467 cred->cr_ngroups = i; 1468 } 1469 if (exflags & MNT_EXRDONLY) 1470 *rdonlyp = 1; 1471 else 1472 *rdonlyp = 0; 1473 if (!lockflag) 1474 VOP_UNLOCK(*vpp); 1475 1476 return (0); 1477 } 1478 1479 /* 1480 * This function compares two net addresses by family and returns non zero 1481 * if they are the same host, or if there is any doubt it returns 0. 1482 * The AF_INET family is handled as a special case so that address mbufs 1483 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1484 */ 1485 int 1486 netaddr_match(int family, union nethostaddr *haddr, struct mbuf *nam) 1487 { 1488 struct sockaddr_in *inetaddr; 1489 1490 switch (family) { 1491 case AF_INET: 1492 inetaddr = mtod(nam, struct sockaddr_in *); 1493 if (inetaddr->sin_family == AF_INET && 1494 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1495 return (1); 1496 break; 1497 default: 1498 break; 1499 }; 1500 return (0); 1501 } 1502 1503 /* 1504 * The write verifier has changed (probably due to a server reboot), so all 1505 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1506 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1507 * flag. Once done the new write verifier can be set for the mount point. 1508 */ 1509 void 1510 nfs_clearcommit(struct mount *mp) 1511 { 1512 struct vnode *vp; 1513 struct buf *bp; 1514 int s; 1515 1516 s = splbio(); 1517 loop: 1518 TAILQ_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes) { 1519 if (vp->v_mount != mp) /* Paranoia */ 1520 goto loop; 1521 LIST_FOREACH(bp, &vp->v_dirtyblkhd, b_vnbufs) { 1522 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1523 == (B_DELWRI | B_NEEDCOMMIT)) 1524 bp->b_flags &= ~B_NEEDCOMMIT; 1525 } 1526 } 1527 splx(s); 1528 } 1529 1530 void 1531 nfs_merge_commit_ranges(struct vnode *vp) 1532 { 1533 struct nfsnode *np = VTONFS(vp); 1534 1535 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 1536 np->n_pushedlo = np->n_pushlo; 1537 np->n_pushedhi = np->n_pushhi; 1538 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 1539 } else { 1540 if (np->n_pushlo < np->n_pushedlo) 1541 np->n_pushedlo = np->n_pushlo; 1542 if (np->n_pushhi > np->n_pushedhi) 1543 np->n_pushedhi = np->n_pushhi; 1544 } 1545 1546 np->n_pushlo = np->n_pushhi = 0; 1547 np->n_commitflags &= ~NFS_COMMIT_PUSH_VALID; 1548 } 1549 1550 int 1551 nfs_in_committed_range(struct vnode *vp, struct buf *bp) 1552 { 1553 struct nfsnode *np = VTONFS(vp); 1554 off_t lo, hi; 1555 1556 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1557 return 0; 1558 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1559 hi = lo + bp->b_dirtyend; 1560 1561 return (lo >= np->n_pushedlo && hi <= np->n_pushedhi); 1562 } 1563 1564 int 1565 nfs_in_tobecommitted_range(struct vnode *vp, struct buf *bp) 1566 { 1567 struct nfsnode *np = VTONFS(vp); 1568 off_t lo, hi; 1569 1570 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1571 return 0; 1572 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1573 hi = lo + bp->b_dirtyend; 1574 1575 return (lo >= np->n_pushlo && hi <= np->n_pushhi); 1576 } 1577 1578 void 1579 nfs_add_committed_range(struct vnode *vp, struct buf *bp) 1580 { 1581 struct nfsnode *np = VTONFS(vp); 1582 off_t lo, hi; 1583 1584 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1585 hi = lo + bp->b_dirtyend; 1586 1587 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) { 1588 np->n_pushedlo = lo; 1589 np->n_pushedhi = hi; 1590 np->n_commitflags |= NFS_COMMIT_PUSHED_VALID; 1591 } else { 1592 if (hi > np->n_pushedhi) 1593 np->n_pushedhi = hi; 1594 if (lo < np->n_pushedlo) 1595 np->n_pushedlo = lo; 1596 } 1597 } 1598 1599 void 1600 nfs_del_committed_range(struct vnode *vp, struct buf *bp) 1601 { 1602 struct nfsnode *np = VTONFS(vp); 1603 off_t lo, hi; 1604 1605 if (!(np->n_commitflags & NFS_COMMIT_PUSHED_VALID)) 1606 return; 1607 1608 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1609 hi = lo + bp->b_dirtyend; 1610 1611 if (lo > np->n_pushedhi || hi < np->n_pushedlo) 1612 return; 1613 if (lo <= np->n_pushedlo) 1614 np->n_pushedlo = hi; 1615 else if (hi >= np->n_pushedhi) 1616 np->n_pushedhi = lo; 1617 else { 1618 /* 1619 * XXX There's only one range. If the deleted range 1620 * is in the middle, pick the largest of the 1621 * contiguous ranges that it leaves. 1622 */ 1623 if ((np->n_pushedlo - lo) > (hi - np->n_pushedhi)) 1624 np->n_pushedhi = lo; 1625 else 1626 np->n_pushedlo = hi; 1627 } 1628 } 1629 1630 void 1631 nfs_add_tobecommitted_range(struct vnode *vp, struct buf *bp) 1632 { 1633 struct nfsnode *np = VTONFS(vp); 1634 off_t lo, hi; 1635 1636 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1637 hi = lo + bp->b_dirtyend; 1638 1639 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) { 1640 np->n_pushlo = lo; 1641 np->n_pushhi = hi; 1642 np->n_commitflags |= NFS_COMMIT_PUSH_VALID; 1643 } else { 1644 if (lo < np->n_pushlo) 1645 np->n_pushlo = lo; 1646 if (hi > np->n_pushhi) 1647 np->n_pushhi = hi; 1648 } 1649 } 1650 1651 void 1652 nfs_del_tobecommitted_range(struct vnode *vp, struct buf *bp) 1653 { 1654 struct nfsnode *np = VTONFS(vp); 1655 off_t lo, hi; 1656 1657 if (!(np->n_commitflags & NFS_COMMIT_PUSH_VALID)) 1658 return; 1659 1660 lo = (off_t)bp->b_blkno * DEV_BSIZE; 1661 hi = lo + bp->b_dirtyend; 1662 1663 if (lo > np->n_pushhi || hi < np->n_pushlo) 1664 return; 1665 1666 if (lo <= np->n_pushlo) 1667 np->n_pushlo = hi; 1668 else if (hi >= np->n_pushhi) 1669 np->n_pushhi = lo; 1670 else { 1671 /* 1672 * XXX There's only one range. If the deleted range 1673 * is in the middle, pick the largest of the 1674 * contiguous ranges that it leaves. 1675 */ 1676 if ((np->n_pushlo - lo) > (hi - np->n_pushhi)) 1677 np->n_pushhi = lo; 1678 else 1679 np->n_pushlo = hi; 1680 } 1681 } 1682 1683 /* 1684 * Map errnos to NFS error numbers. For Version 3 also filter out error 1685 * numbers not specified for the associated procedure. 1686 */ 1687 int 1688 nfsrv_errmap(struct nfsrv_descript *nd, int err) 1689 { 1690 short *defaulterrp, *errp; 1691 1692 if (nd->nd_flag & ND_NFSV3) { 1693 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1694 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1695 while (*++errp) { 1696 if (*errp == err) 1697 return (err); 1698 else if (*errp > err) 1699 break; 1700 } 1701 return ((int)*defaulterrp); 1702 } else 1703 return (err & 0xffff); 1704 } 1705 if (err <= nitems(nfsrv_v2errmap)) 1706 return ((int)nfsrv_v2errmap[err - 1]); 1707 return (NFSERR_IO); 1708 } 1709 1710 /* 1711 * If full is non zero, set all fields, otherwise just set mode and time fields 1712 */ 1713 void 1714 nfsm_v3attrbuild(struct mbuf **mp, struct vattr *a, int full) 1715 { 1716 struct mbuf *mb; 1717 u_int32_t *tl; 1718 1719 mb = *mp; 1720 1721 if (a->va_mode != (mode_t)VNOVAL) { 1722 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1723 *tl++ = nfs_true; 1724 *tl = txdr_unsigned(a->va_mode); 1725 } else { 1726 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1727 *tl = nfs_false; 1728 } 1729 if (full && a->va_uid != (uid_t)VNOVAL) { 1730 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1731 *tl++ = nfs_true; 1732 *tl = txdr_unsigned(a->va_uid); 1733 } else { 1734 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1735 *tl = nfs_false; 1736 } 1737 if (full && a->va_gid != (gid_t)VNOVAL) { 1738 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED); 1739 *tl++ = nfs_true; 1740 *tl = txdr_unsigned((a)->va_gid); 1741 } else { 1742 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1743 *tl = nfs_false; 1744 } 1745 if (full && a->va_size != VNOVAL) { 1746 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1747 *tl++ = nfs_true; 1748 txdr_hyper(a->va_size, tl); 1749 } else { 1750 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1751 *tl = nfs_false; 1752 } 1753 if (a->va_atime.tv_nsec != VNOVAL) { 1754 if (a->va_atime.tv_sec != gettime()) { 1755 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1756 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 1757 txdr_nfsv3time(&a->va_atime, tl); 1758 } else { 1759 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1760 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 1761 } 1762 } else { 1763 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1764 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 1765 } 1766 if (a->va_mtime.tv_nsec != VNOVAL) { 1767 if (a->va_mtime.tv_sec != gettime()) { 1768 tl = nfsm_build(&mb, 3 * NFSX_UNSIGNED); 1769 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); 1770 txdr_nfsv3time(&a->va_mtime, tl); 1771 } else { 1772 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1773 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); 1774 } 1775 } else { 1776 tl = nfsm_build(&mb, NFSX_UNSIGNED); 1777 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); 1778 } 1779 1780 *mp = mb; 1781 } 1782 1783 /* 1784 * Ensure a contiguous buffer len bytes long 1785 */ 1786 void * 1787 nfsm_build(struct mbuf **mp, u_int len) 1788 { 1789 struct mbuf *mb, *mb2; 1790 caddr_t bpos; 1791 1792 mb = *mp; 1793 bpos = mb_offset(mb); 1794 1795 if (len > m_trailingspace(mb)) { 1796 MGET(mb2, M_WAIT, MT_DATA); 1797 if (len > MLEN) 1798 panic("build > MLEN"); 1799 mb->m_next = mb2; 1800 mb = mb2; 1801 mb->m_len = 0; 1802 bpos = mtod(mb, caddr_t); 1803 } 1804 mb->m_len += len; 1805 1806 *mp = mb; 1807 1808 return (bpos); 1809 } 1810 1811 void 1812 nfsm_fhtom(struct nfsm_info *info, struct vnode *v, int v3) 1813 { 1814 struct nfsnode *n = VTONFS(v); 1815 1816 if (v3) { 1817 nfsm_strtombuf(&info->nmi_mb, n->n_fhp, n->n_fhsize); 1818 } else { 1819 nfsm_buftombuf(&info->nmi_mb, n->n_fhp, NFSX_V2FH); 1820 } 1821 } 1822 1823 void 1824 nfsm_srvfhtom(struct mbuf **mp, fhandle_t *f, int v3) 1825 { 1826 if (v3) { 1827 nfsm_strtombuf(mp, f, NFSX_V3FH); 1828 } else { 1829 nfsm_buftombuf(mp, f, NFSX_V2FH); 1830 } 1831 } 1832 1833 int 1834 nfsm_srvsattr(struct mbuf **mp, struct vattr *va, struct mbuf *mrep, 1835 caddr_t *dposp) 1836 { 1837 struct nfsm_info info; 1838 uint32_t *tl, t1; 1839 caddr_t cp2; 1840 int error = 0; 1841 1842 info.nmi_md = *mp; 1843 info.nmi_dpos = *dposp; 1844 info.nmi_mrep = mrep; 1845 1846 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1847 if (*tl == nfs_true) { 1848 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1849 va->va_mode = nfstov_mode(*tl); 1850 } 1851 1852 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1853 if (*tl == nfs_true) { 1854 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1855 va->va_uid = fxdr_unsigned(uid_t, *tl); 1856 } 1857 1858 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1859 if (*tl == nfs_true) { 1860 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1861 va->va_gid = fxdr_unsigned(gid_t, *tl); 1862 } 1863 1864 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1865 if (*tl == nfs_true) { 1866 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1867 va->va_size = fxdr_hyper(tl); 1868 } 1869 1870 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1871 switch (fxdr_unsigned(int, *tl)) { 1872 case NFSV3SATTRTIME_TOCLIENT: 1873 va->va_vaflags |= VA_UTIMES_CHANGE; 1874 va->va_vaflags &= ~VA_UTIMES_NULL; 1875 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1876 fxdr_nfsv3time(tl, &va->va_atime); 1877 break; 1878 case NFSV3SATTRTIME_TOSERVER: 1879 va->va_vaflags |= VA_UTIMES_CHANGE; 1880 getnanotime(&va->va_atime); 1881 break; 1882 }; 1883 1884 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); 1885 switch (fxdr_unsigned(int, *tl)) { 1886 case NFSV3SATTRTIME_TOCLIENT: 1887 va->va_vaflags |= VA_UTIMES_CHANGE; 1888 va->va_vaflags &= ~VA_UTIMES_NULL; 1889 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 1890 fxdr_nfsv3time(tl, &va->va_mtime); 1891 break; 1892 case NFSV3SATTRTIME_TOSERVER: 1893 va->va_vaflags |= VA_UTIMES_CHANGE; 1894 getnanotime(&va->va_mtime); 1895 break; 1896 }; 1897 1898 *dposp = info.nmi_dpos; 1899 *mp = info.nmi_md; 1900 nfsmout: 1901 return (error); 1902 } 1903 1904 void 1905 txdr_nfsv2time(const struct timespec *from, struct nfsv2_time *to) 1906 { 1907 if (from->tv_nsec == VNOVAL) { 1908 to->nfsv2_sec = nfs_xdrneg1; 1909 to->nfsv2_usec = nfs_xdrneg1; 1910 } else if (from->tv_sec == -1) { 1911 /* 1912 * can't request a time of -1; send 1913 * -1.000001 == {-2,999999} instead 1914 */ 1915 to->nfsv2_sec = htonl(-2); 1916 to->nfsv2_usec = htonl(999999); 1917 } else { 1918 to->nfsv2_sec = htonl(from->tv_sec); 1919 to->nfsv2_usec = htonl(from->tv_nsec / 1000); 1920 } 1921 }
Cache object: 824ad36d8105a751d1c4ff06aae42766
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