1 /* $OpenBSD: nfs_subs.c,v 1.38 2001/12/19 08:58:06 art 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 40 */ 41 42 43 /* 44 * These functions support the macros and help fiddle mbuf chains for 45 * the nfs op functions. They do things like create the rpc header and 46 * copy data between mbuf chains and uio lists. 47 */ 48 #include <sys/param.h> 49 #include <sys/proc.h> 50 #include <sys/systm.h> 51 #include <sys/kernel.h> 52 #include <sys/mount.h> 53 #include <sys/vnode.h> 54 #include <sys/namei.h> 55 #include <sys/mbuf.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/stat.h> 59 #include <sys/malloc.h> 60 #include <sys/time.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <nfs/rpcv2.h> 65 #include <nfs/nfsproto.h> 66 #include <nfs/nfsnode.h> 67 #include <nfs/nfs.h> 68 #include <nfs/xdr_subs.h> 69 #include <nfs/nfsm_subs.h> 70 #include <nfs/nfsmount.h> 71 #include <nfs/nfsrtt.h> 72 #include <nfs/nfs_var.h> 73 74 #include <miscfs/specfs/specdev.h> 75 76 #include <netinet/in.h> 77 #ifdef ISO 78 #include <netiso/iso.h> 79 #endif 80 81 #include <dev/rndvar.h> 82 83 #ifdef __GNUC__ 84 #define INLINE __inline 85 #else 86 #define INLINE 87 #endif 88 89 int nfs_attrtimeo __P((struct nfsnode *np)); 90 91 /* 92 * Data items converted to xdr at startup, since they are constant 93 * This is kinda hokey, but may save a little time doing byte swaps 94 */ 95 u_int32_t nfs_xdrneg1; 96 u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr, 97 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted, 98 rpc_auth_kerb; 99 u_int32_t nfs_prog, nfs_true, nfs_false; 100 101 /* And other global data */ 102 static u_int32_t nfs_xid = 0; 103 static u_int32_t nfs_xid_touched = 0; 104 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 105 NFCHR, NFNON }; 106 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 107 NFFIFO, NFNON }; 108 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 109 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 110 int nfs_ticks; 111 112 /* 113 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 114 */ 115 int nfsv3_procid[NFS_NPROCS] = { 116 NFSPROC_NULL, 117 NFSPROC_GETATTR, 118 NFSPROC_SETATTR, 119 NFSPROC_NOOP, 120 NFSPROC_LOOKUP, 121 NFSPROC_READLINK, 122 NFSPROC_READ, 123 NFSPROC_NOOP, 124 NFSPROC_WRITE, 125 NFSPROC_CREATE, 126 NFSPROC_REMOVE, 127 NFSPROC_RENAME, 128 NFSPROC_LINK, 129 NFSPROC_SYMLINK, 130 NFSPROC_MKDIR, 131 NFSPROC_RMDIR, 132 NFSPROC_READDIR, 133 NFSPROC_FSSTAT, 134 NFSPROC_NOOP, 135 NFSPROC_NOOP, 136 NFSPROC_NOOP, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP 142 }; 143 144 /* 145 * and the reverse mapping from generic to Version 2 procedure numbers 146 */ 147 int nfsv2_procid[NFS_NPROCS] = { 148 NFSV2PROC_NULL, 149 NFSV2PROC_GETATTR, 150 NFSV2PROC_SETATTR, 151 NFSV2PROC_LOOKUP, 152 NFSV2PROC_NOOP, 153 NFSV2PROC_READLINK, 154 NFSV2PROC_READ, 155 NFSV2PROC_WRITE, 156 NFSV2PROC_CREATE, 157 NFSV2PROC_MKDIR, 158 NFSV2PROC_SYMLINK, 159 NFSV2PROC_CREATE, 160 NFSV2PROC_REMOVE, 161 NFSV2PROC_RMDIR, 162 NFSV2PROC_RENAME, 163 NFSV2PROC_LINK, 164 NFSV2PROC_READDIR, 165 NFSV2PROC_NOOP, 166 NFSV2PROC_STATFS, 167 NFSV2PROC_NOOP, 168 NFSV2PROC_NOOP, 169 NFSV2PROC_NOOP, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 }; 175 176 /* 177 * Maps errno values to nfs error numbers. 178 * Use NFSERR_IO as the catch all for ones not specifically defined in 179 * RFC 1094. 180 */ 181 static u_char nfsrv_v2errmap[ELAST] = { 182 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 183 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 184 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 185 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 186 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 188 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 189 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 191 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 192 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 193 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 194 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 195 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 198 NFSERR_IO, 199 }; 200 201 /* 202 * Maps errno values to nfs error numbers. 203 * Although it is not obvious whether or not NFS clients really care if 204 * a returned error value is in the specified list for the procedure, the 205 * safest thing to do is filter them appropriately. For Version 2, the 206 * X/Open XNFS document is the only specification that defines error values 207 * for each RPC (The RFC simply lists all possible error values for all RPCs), 208 * so I have decided to not do this for Version 2. 209 * The first entry is the default error return and the rest are the valid 210 * errors for that RPC in increasing numeric order. 211 */ 212 static short nfsv3err_null[] = { 213 0, 214 0, 215 }; 216 217 static short nfsv3err_getattr[] = { 218 NFSERR_IO, 219 NFSERR_IO, 220 NFSERR_STALE, 221 NFSERR_BADHANDLE, 222 NFSERR_SERVERFAULT, 223 0, 224 }; 225 226 static short nfsv3err_setattr[] = { 227 NFSERR_IO, 228 NFSERR_PERM, 229 NFSERR_IO, 230 NFSERR_ACCES, 231 NFSERR_INVAL, 232 NFSERR_NOSPC, 233 NFSERR_ROFS, 234 NFSERR_DQUOT, 235 NFSERR_STALE, 236 NFSERR_BADHANDLE, 237 NFSERR_NOT_SYNC, 238 NFSERR_SERVERFAULT, 239 0, 240 }; 241 242 static short nfsv3err_lookup[] = { 243 NFSERR_IO, 244 NFSERR_NOENT, 245 NFSERR_IO, 246 NFSERR_ACCES, 247 NFSERR_NOTDIR, 248 NFSERR_NAMETOL, 249 NFSERR_STALE, 250 NFSERR_BADHANDLE, 251 NFSERR_SERVERFAULT, 252 0, 253 }; 254 255 static short nfsv3err_access[] = { 256 NFSERR_IO, 257 NFSERR_IO, 258 NFSERR_STALE, 259 NFSERR_BADHANDLE, 260 NFSERR_SERVERFAULT, 261 0, 262 }; 263 264 static short nfsv3err_readlink[] = { 265 NFSERR_IO, 266 NFSERR_IO, 267 NFSERR_ACCES, 268 NFSERR_INVAL, 269 NFSERR_STALE, 270 NFSERR_BADHANDLE, 271 NFSERR_NOTSUPP, 272 NFSERR_SERVERFAULT, 273 0, 274 }; 275 276 static short nfsv3err_read[] = { 277 NFSERR_IO, 278 NFSERR_IO, 279 NFSERR_NXIO, 280 NFSERR_ACCES, 281 NFSERR_INVAL, 282 NFSERR_STALE, 283 NFSERR_BADHANDLE, 284 NFSERR_SERVERFAULT, 285 0, 286 }; 287 288 static short nfsv3err_write[] = { 289 NFSERR_IO, 290 NFSERR_IO, 291 NFSERR_ACCES, 292 NFSERR_INVAL, 293 NFSERR_FBIG, 294 NFSERR_NOSPC, 295 NFSERR_ROFS, 296 NFSERR_DQUOT, 297 NFSERR_STALE, 298 NFSERR_BADHANDLE, 299 NFSERR_SERVERFAULT, 300 0, 301 }; 302 303 static short nfsv3err_create[] = { 304 NFSERR_IO, 305 NFSERR_IO, 306 NFSERR_ACCES, 307 NFSERR_EXIST, 308 NFSERR_NOTDIR, 309 NFSERR_NOSPC, 310 NFSERR_ROFS, 311 NFSERR_NAMETOL, 312 NFSERR_DQUOT, 313 NFSERR_STALE, 314 NFSERR_BADHANDLE, 315 NFSERR_NOTSUPP, 316 NFSERR_SERVERFAULT, 317 0, 318 }; 319 320 static short nfsv3err_mkdir[] = { 321 NFSERR_IO, 322 NFSERR_IO, 323 NFSERR_ACCES, 324 NFSERR_EXIST, 325 NFSERR_NOTDIR, 326 NFSERR_NOSPC, 327 NFSERR_ROFS, 328 NFSERR_NAMETOL, 329 NFSERR_DQUOT, 330 NFSERR_STALE, 331 NFSERR_BADHANDLE, 332 NFSERR_NOTSUPP, 333 NFSERR_SERVERFAULT, 334 0, 335 }; 336 337 static short nfsv3err_symlink[] = { 338 NFSERR_IO, 339 NFSERR_IO, 340 NFSERR_ACCES, 341 NFSERR_EXIST, 342 NFSERR_NOTDIR, 343 NFSERR_NOSPC, 344 NFSERR_ROFS, 345 NFSERR_NAMETOL, 346 NFSERR_DQUOT, 347 NFSERR_STALE, 348 NFSERR_BADHANDLE, 349 NFSERR_NOTSUPP, 350 NFSERR_SERVERFAULT, 351 0, 352 }; 353 354 static short nfsv3err_mknod[] = { 355 NFSERR_IO, 356 NFSERR_IO, 357 NFSERR_ACCES, 358 NFSERR_EXIST, 359 NFSERR_NOTDIR, 360 NFSERR_NOSPC, 361 NFSERR_ROFS, 362 NFSERR_NAMETOL, 363 NFSERR_DQUOT, 364 NFSERR_STALE, 365 NFSERR_BADHANDLE, 366 NFSERR_NOTSUPP, 367 NFSERR_SERVERFAULT, 368 NFSERR_BADTYPE, 369 0, 370 }; 371 372 static short nfsv3err_remove[] = { 373 NFSERR_IO, 374 NFSERR_NOENT, 375 NFSERR_IO, 376 NFSERR_ACCES, 377 NFSERR_NOTDIR, 378 NFSERR_ROFS, 379 NFSERR_NAMETOL, 380 NFSERR_STALE, 381 NFSERR_BADHANDLE, 382 NFSERR_SERVERFAULT, 383 0, 384 }; 385 386 static short nfsv3err_rmdir[] = { 387 NFSERR_IO, 388 NFSERR_NOENT, 389 NFSERR_IO, 390 NFSERR_ACCES, 391 NFSERR_EXIST, 392 NFSERR_NOTDIR, 393 NFSERR_INVAL, 394 NFSERR_ROFS, 395 NFSERR_NAMETOL, 396 NFSERR_NOTEMPTY, 397 NFSERR_STALE, 398 NFSERR_BADHANDLE, 399 NFSERR_NOTSUPP, 400 NFSERR_SERVERFAULT, 401 0, 402 }; 403 404 static short nfsv3err_rename[] = { 405 NFSERR_IO, 406 NFSERR_NOENT, 407 NFSERR_IO, 408 NFSERR_ACCES, 409 NFSERR_EXIST, 410 NFSERR_XDEV, 411 NFSERR_NOTDIR, 412 NFSERR_ISDIR, 413 NFSERR_INVAL, 414 NFSERR_NOSPC, 415 NFSERR_ROFS, 416 NFSERR_MLINK, 417 NFSERR_NAMETOL, 418 NFSERR_NOTEMPTY, 419 NFSERR_DQUOT, 420 NFSERR_STALE, 421 NFSERR_BADHANDLE, 422 NFSERR_NOTSUPP, 423 NFSERR_SERVERFAULT, 424 0, 425 }; 426 427 static short nfsv3err_link[] = { 428 NFSERR_IO, 429 NFSERR_IO, 430 NFSERR_ACCES, 431 NFSERR_EXIST, 432 NFSERR_XDEV, 433 NFSERR_NOTDIR, 434 NFSERR_INVAL, 435 NFSERR_NOSPC, 436 NFSERR_ROFS, 437 NFSERR_MLINK, 438 NFSERR_NAMETOL, 439 NFSERR_DQUOT, 440 NFSERR_STALE, 441 NFSERR_BADHANDLE, 442 NFSERR_NOTSUPP, 443 NFSERR_SERVERFAULT, 444 0, 445 }; 446 447 static short nfsv3err_readdir[] = { 448 NFSERR_IO, 449 NFSERR_IO, 450 NFSERR_ACCES, 451 NFSERR_NOTDIR, 452 NFSERR_STALE, 453 NFSERR_BADHANDLE, 454 NFSERR_BAD_COOKIE, 455 NFSERR_TOOSMALL, 456 NFSERR_SERVERFAULT, 457 0, 458 }; 459 460 static short nfsv3err_readdirplus[] = { 461 NFSERR_IO, 462 NFSERR_IO, 463 NFSERR_ACCES, 464 NFSERR_NOTDIR, 465 NFSERR_STALE, 466 NFSERR_BADHANDLE, 467 NFSERR_BAD_COOKIE, 468 NFSERR_NOTSUPP, 469 NFSERR_TOOSMALL, 470 NFSERR_SERVERFAULT, 471 0, 472 }; 473 474 static short nfsv3err_fsstat[] = { 475 NFSERR_IO, 476 NFSERR_IO, 477 NFSERR_STALE, 478 NFSERR_BADHANDLE, 479 NFSERR_SERVERFAULT, 480 0, 481 }; 482 483 static short nfsv3err_fsinfo[] = { 484 NFSERR_STALE, 485 NFSERR_STALE, 486 NFSERR_BADHANDLE, 487 NFSERR_SERVERFAULT, 488 0, 489 }; 490 491 static short nfsv3err_pathconf[] = { 492 NFSERR_STALE, 493 NFSERR_STALE, 494 NFSERR_BADHANDLE, 495 NFSERR_SERVERFAULT, 496 0, 497 }; 498 499 static short nfsv3err_commit[] = { 500 NFSERR_IO, 501 NFSERR_IO, 502 NFSERR_STALE, 503 NFSERR_BADHANDLE, 504 NFSERR_SERVERFAULT, 505 0, 506 }; 507 508 static short *nfsrv_v3errmap[] = { 509 nfsv3err_null, 510 nfsv3err_getattr, 511 nfsv3err_setattr, 512 nfsv3err_lookup, 513 nfsv3err_access, 514 nfsv3err_readlink, 515 nfsv3err_read, 516 nfsv3err_write, 517 nfsv3err_create, 518 nfsv3err_mkdir, 519 nfsv3err_symlink, 520 nfsv3err_mknod, 521 nfsv3err_remove, 522 nfsv3err_rmdir, 523 nfsv3err_rename, 524 nfsv3err_link, 525 nfsv3err_readdir, 526 nfsv3err_readdirplus, 527 nfsv3err_fsstat, 528 nfsv3err_fsinfo, 529 nfsv3err_pathconf, 530 nfsv3err_commit, 531 }; 532 533 extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; 534 extern struct nfsrtt nfsrtt; 535 extern struct nfsstats nfsstats; 536 extern nfstype nfsv2_type[9]; 537 extern nfstype nfsv3_type[9]; 538 extern struct nfsnodehashhead *nfsnodehashtbl; 539 extern u_long nfsnodehash; 540 541 LIST_HEAD(nfsnodehashhead, nfsnode); 542 543 /* 544 * Create the header for an rpc request packet 545 * The hsiz is the size of the rest of the nfs request header. 546 * (just used to decide if a cluster is a good idea) 547 */ 548 struct mbuf * 549 nfsm_reqh(vp, procid, hsiz, bposp) 550 struct vnode *vp; 551 u_long procid; 552 int hsiz; 553 caddr_t *bposp; 554 { 555 register struct mbuf *mb; 556 register caddr_t bpos; 557 558 MGET(mb, M_WAIT, MT_DATA); 559 if (hsiz >= MINCLSIZE) 560 MCLGET(mb, M_WAIT); 561 mb->m_len = 0; 562 bpos = mtod(mb, caddr_t); 563 564 /* Finally, return values */ 565 *bposp = bpos; 566 return (mb); 567 } 568 569 /* 570 * Build the RPC header and fill in the authorization info. 571 * The authorization string argument is only used when the credentials 572 * come from outside of the kernel. 573 * Returns the head of the mbuf list. 574 */ 575 struct mbuf * 576 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 577 verf_str, mrest, mrest_len, mbp, xidp) 578 register struct ucred *cr; 579 int nmflag; 580 int procid; 581 int auth_type; 582 int auth_len; 583 char *auth_str; 584 int verf_len; 585 char *verf_str; 586 struct mbuf *mrest; 587 int mrest_len; 588 struct mbuf **mbp; 589 u_int32_t *xidp; 590 { 591 register struct mbuf *mb; 592 register u_int32_t *tl; 593 register caddr_t bpos; 594 register int i; 595 struct mbuf *mreq, *mb2; 596 int siz, grpsiz, authsiz; 597 598 authsiz = nfsm_rndup(auth_len); 599 MGETHDR(mb, M_WAIT, MT_DATA); 600 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 601 MCLGET(mb, M_WAIT); 602 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 603 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 604 } else { 605 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 606 } 607 mb->m_len = 0; 608 mreq = mb; 609 bpos = mtod(mb, caddr_t); 610 611 /* 612 * First the RPC header. 613 */ 614 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 615 616 /* Get a new (non-zero) xid */ 617 618 if ((nfs_xid == 0) && (nfs_xid_touched == 0)) { 619 nfs_xid = arc4random(); 620 nfs_xid_touched = 1; 621 } else { 622 while ((*xidp = arc4random() % 256) == 0) 623 ; 624 nfs_xid += *xidp; 625 } 626 627 *tl++ = *xidp = txdr_unsigned(nfs_xid); 628 *tl++ = rpc_call; 629 *tl++ = rpc_vers; 630 *tl++ = txdr_unsigned(NFS_PROG); 631 if (nmflag & NFSMNT_NFSV3) 632 *tl++ = txdr_unsigned(NFS_VER3); 633 else 634 *tl++ = txdr_unsigned(NFS_VER2); 635 if (nmflag & NFSMNT_NFSV3) 636 *tl++ = txdr_unsigned(procid); 637 else 638 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 639 640 /* 641 * And then the authorization cred. 642 */ 643 *tl++ = txdr_unsigned(auth_type); 644 *tl = txdr_unsigned(authsiz); 645 switch (auth_type) { 646 case RPCAUTH_UNIX: 647 nfsm_build(tl, u_int32_t *, auth_len); 648 *tl++ = 0; /* stamp ?? */ 649 *tl++ = 0; /* NULL hostname */ 650 *tl++ = txdr_unsigned(cr->cr_uid); 651 *tl++ = txdr_unsigned(cr->cr_gid); 652 grpsiz = (auth_len >> 2) - 5; 653 *tl++ = txdr_unsigned(grpsiz); 654 for (i = 0; i < grpsiz; i++) 655 *tl++ = txdr_unsigned(cr->cr_groups[i]); 656 break; 657 case RPCAUTH_KERB4: 658 siz = auth_len; 659 while (siz > 0) { 660 if (M_TRAILINGSPACE(mb) == 0) { 661 MGET(mb2, M_WAIT, MT_DATA); 662 if (siz >= MINCLSIZE) 663 MCLGET(mb2, M_WAIT); 664 mb->m_next = mb2; 665 mb = mb2; 666 mb->m_len = 0; 667 bpos = mtod(mb, caddr_t); 668 } 669 i = min(siz, M_TRAILINGSPACE(mb)); 670 bcopy(auth_str, bpos, i); 671 mb->m_len += i; 672 auth_str += i; 673 bpos += i; 674 siz -= i; 675 } 676 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 677 for (i = 0; i < siz; i++) 678 *bpos++ = '\0'; 679 mb->m_len += siz; 680 } 681 break; 682 }; 683 684 /* 685 * And the verifier... 686 */ 687 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 688 if (verf_str) { 689 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 690 *tl = txdr_unsigned(verf_len); 691 siz = verf_len; 692 while (siz > 0) { 693 if (M_TRAILINGSPACE(mb) == 0) { 694 MGET(mb2, M_WAIT, MT_DATA); 695 if (siz >= MINCLSIZE) 696 MCLGET(mb2, M_WAIT); 697 mb->m_next = mb2; 698 mb = mb2; 699 mb->m_len = 0; 700 bpos = mtod(mb, caddr_t); 701 } 702 i = min(siz, M_TRAILINGSPACE(mb)); 703 bcopy(verf_str, bpos, i); 704 mb->m_len += i; 705 verf_str += i; 706 bpos += i; 707 siz -= i; 708 } 709 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 710 for (i = 0; i < siz; i++) 711 *bpos++ = '\0'; 712 mb->m_len += siz; 713 } 714 } else { 715 *tl++ = txdr_unsigned(RPCAUTH_NULL); 716 *tl = 0; 717 } 718 mb->m_next = mrest; 719 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 720 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 721 *mbp = mb; 722 return (mreq); 723 } 724 725 /* 726 * copies mbuf chain to the uio scatter/gather list 727 */ 728 int 729 nfsm_mbuftouio(mrep, uiop, siz, dpos) 730 struct mbuf **mrep; 731 register struct uio *uiop; 732 int siz; 733 caddr_t *dpos; 734 { 735 register char *mbufcp, *uiocp; 736 register int xfer, left, len; 737 register struct mbuf *mp; 738 long uiosiz, rem; 739 int error = 0; 740 741 mp = *mrep; 742 mbufcp = *dpos; 743 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 744 rem = nfsm_rndup(siz)-siz; 745 while (siz > 0) { 746 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 747 return (EFBIG); 748 left = uiop->uio_iov->iov_len; 749 uiocp = uiop->uio_iov->iov_base; 750 if (left > siz) 751 left = siz; 752 uiosiz = left; 753 while (left > 0) { 754 while (len == 0) { 755 mp = mp->m_next; 756 if (mp == NULL) 757 return (EBADRPC); 758 mbufcp = mtod(mp, caddr_t); 759 len = mp->m_len; 760 } 761 xfer = (left > len) ? len : left; 762 #ifdef notdef 763 /* Not Yet.. */ 764 if (uiop->uio_iov->iov_op != NULL) 765 (*(uiop->uio_iov->iov_op)) 766 (mbufcp, uiocp, xfer); 767 else 768 #endif 769 if (uiop->uio_segflg == UIO_SYSSPACE) 770 bcopy(mbufcp, uiocp, xfer); 771 else 772 copyout(mbufcp, uiocp, xfer); 773 left -= xfer; 774 len -= xfer; 775 mbufcp += xfer; 776 uiocp += xfer; 777 uiop->uio_offset += xfer; 778 uiop->uio_resid -= xfer; 779 } 780 if (uiop->uio_iov->iov_len <= siz) { 781 uiop->uio_iovcnt--; 782 uiop->uio_iov++; 783 } else { 784 uiop->uio_iov->iov_base += uiosiz; 785 uiop->uio_iov->iov_len -= uiosiz; 786 } 787 siz -= uiosiz; 788 } 789 *dpos = mbufcp; 790 *mrep = mp; 791 if (rem > 0) { 792 if (len < rem) 793 error = nfs_adv(mrep, dpos, rem, len); 794 else 795 *dpos += rem; 796 } 797 return (error); 798 } 799 800 /* 801 * copies a uio scatter/gather list to an mbuf chain. 802 * NOTE: can ony handle iovcnt == 1 803 */ 804 int 805 nfsm_uiotombuf(uiop, mq, siz, bpos) 806 register struct uio *uiop; 807 struct mbuf **mq; 808 int siz; 809 caddr_t *bpos; 810 { 811 register char *uiocp; 812 register struct mbuf *mp, *mp2; 813 register int xfer, left, mlen; 814 int uiosiz, clflg, rem; 815 char *cp; 816 817 #ifdef DIAGNOSTIC 818 if (uiop->uio_iovcnt != 1) 819 panic("nfsm_uiotombuf: iovcnt != 1"); 820 #endif 821 822 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 823 clflg = 1; 824 else 825 clflg = 0; 826 rem = nfsm_rndup(siz)-siz; 827 mp = mp2 = *mq; 828 while (siz > 0) { 829 left = uiop->uio_iov->iov_len; 830 uiocp = uiop->uio_iov->iov_base; 831 if (left > siz) 832 left = siz; 833 uiosiz = left; 834 while (left > 0) { 835 mlen = M_TRAILINGSPACE(mp); 836 if (mlen == 0) { 837 MGET(mp, M_WAIT, MT_DATA); 838 if (clflg) 839 MCLGET(mp, M_WAIT); 840 mp->m_len = 0; 841 mp2->m_next = mp; 842 mp2 = mp; 843 mlen = M_TRAILINGSPACE(mp); 844 } 845 xfer = (left > mlen) ? mlen : left; 846 #ifdef notdef 847 /* Not Yet.. */ 848 if (uiop->uio_iov->iov_op != NULL) 849 (*(uiop->uio_iov->iov_op)) 850 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 851 else 852 #endif 853 if (uiop->uio_segflg == UIO_SYSSPACE) 854 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 855 else 856 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 857 mp->m_len += xfer; 858 left -= xfer; 859 uiocp += xfer; 860 uiop->uio_offset += xfer; 861 uiop->uio_resid -= xfer; 862 } 863 uiop->uio_iov->iov_base += uiosiz; 864 uiop->uio_iov->iov_len -= uiosiz; 865 siz -= uiosiz; 866 } 867 if (rem > 0) { 868 if (rem > M_TRAILINGSPACE(mp)) { 869 MGET(mp, M_WAIT, MT_DATA); 870 mp->m_len = 0; 871 mp2->m_next = mp; 872 } 873 cp = mtod(mp, caddr_t)+mp->m_len; 874 for (left = 0; left < rem; left++) 875 *cp++ = '\0'; 876 mp->m_len += rem; 877 *bpos = cp; 878 } else 879 *bpos = mtod(mp, caddr_t)+mp->m_len; 880 *mq = mp; 881 return (0); 882 } 883 884 /* 885 * Help break down an mbuf chain by setting the first siz bytes contiguous 886 * pointed to by returned val. 887 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 888 * cases. (The macros use the vars. dpos and dpos2) 889 */ 890 int 891 nfsm_disct(mdp, dposp, siz, left, cp2) 892 struct mbuf **mdp; 893 caddr_t *dposp; 894 int siz; 895 int left; 896 caddr_t *cp2; 897 { 898 register struct mbuf *mp, *mp2; 899 register int siz2, xfer; 900 register caddr_t p; 901 902 mp = *mdp; 903 while (left == 0) { 904 *mdp = mp = mp->m_next; 905 if (mp == NULL) 906 return (EBADRPC); 907 left = mp->m_len; 908 *dposp = mtod(mp, caddr_t); 909 } 910 if (left >= siz) { 911 *cp2 = *dposp; 912 *dposp += siz; 913 } else if (mp->m_next == NULL) { 914 return (EBADRPC); 915 } else if (siz > MHLEN) { 916 panic("nfs S too big"); 917 } else { 918 MGET(mp2, M_WAIT, MT_DATA); 919 mp2->m_next = mp->m_next; 920 mp->m_next = mp2; 921 mp->m_len -= left; 922 mp = mp2; 923 *cp2 = p = mtod(mp, caddr_t); 924 bcopy(*dposp, p, left); /* Copy what was left */ 925 siz2 = siz-left; 926 p += left; 927 mp2 = mp->m_next; 928 /* Loop around copying up the siz2 bytes */ 929 while (siz2 > 0) { 930 if (mp2 == NULL) 931 return (EBADRPC); 932 xfer = (siz2 > mp2->m_len) ? mp2->m_len : siz2; 933 if (xfer > 0) { 934 bcopy(mtod(mp2, caddr_t), p, xfer); 935 NFSMADV(mp2, xfer); 936 mp2->m_len -= xfer; 937 p += xfer; 938 siz2 -= xfer; 939 } 940 if (siz2 > 0) 941 mp2 = mp2->m_next; 942 } 943 mp->m_len = siz; 944 *mdp = mp2; 945 *dposp = mtod(mp2, caddr_t); 946 } 947 return (0); 948 } 949 950 /* 951 * Advance the position in the mbuf chain. 952 */ 953 int 954 nfs_adv(mdp, dposp, offs, left) 955 struct mbuf **mdp; 956 caddr_t *dposp; 957 int offs; 958 int left; 959 { 960 register struct mbuf *m; 961 register int s; 962 963 m = *mdp; 964 s = left; 965 while (s < offs) { 966 offs -= s; 967 m = m->m_next; 968 if (m == NULL) 969 return (EBADRPC); 970 s = m->m_len; 971 } 972 *mdp = m; 973 *dposp = mtod(m, caddr_t)+offs; 974 return (0); 975 } 976 977 /* 978 * Copy a string into mbufs for the hard cases... 979 */ 980 int 981 nfsm_strtmbuf(mb, bpos, cp, siz) 982 struct mbuf **mb; 983 char **bpos; 984 char *cp; 985 long siz; 986 { 987 register struct mbuf *m1 = NULL, *m2; 988 long left, xfer, len, tlen; 989 u_int32_t *tl; 990 int putsize; 991 992 putsize = 1; 993 m2 = *mb; 994 left = M_TRAILINGSPACE(m2); 995 if (left > 0) { 996 tl = ((u_int32_t *)(*bpos)); 997 *tl++ = txdr_unsigned(siz); 998 putsize = 0; 999 left -= NFSX_UNSIGNED; 1000 m2->m_len += NFSX_UNSIGNED; 1001 if (left > 0) { 1002 bcopy(cp, (caddr_t) tl, left); 1003 siz -= left; 1004 cp += left; 1005 m2->m_len += left; 1006 left = 0; 1007 } 1008 } 1009 /* Loop around adding mbufs */ 1010 while (siz > 0) { 1011 MGET(m1, M_WAIT, MT_DATA); 1012 if (siz > MLEN) 1013 MCLGET(m1, M_WAIT); 1014 m1->m_len = NFSMSIZ(m1); 1015 m2->m_next = m1; 1016 m2 = m1; 1017 tl = mtod(m1, u_int32_t *); 1018 tlen = 0; 1019 if (putsize) { 1020 *tl++ = txdr_unsigned(siz); 1021 m1->m_len -= NFSX_UNSIGNED; 1022 tlen = NFSX_UNSIGNED; 1023 putsize = 0; 1024 } 1025 if (siz < m1->m_len) { 1026 len = nfsm_rndup(siz); 1027 xfer = siz; 1028 if (xfer < len) 1029 *(tl+(xfer>>2)) = 0; 1030 } else { 1031 xfer = len = m1->m_len; 1032 } 1033 bcopy(cp, (caddr_t) tl, xfer); 1034 m1->m_len = len+tlen; 1035 siz -= xfer; 1036 cp += xfer; 1037 } 1038 *mb = m1; 1039 *bpos = mtod(m1, caddr_t)+m1->m_len; 1040 return (0); 1041 } 1042 1043 /* 1044 * Called once to initialize data structures... 1045 */ 1046 void 1047 nfs_init() 1048 { 1049 static struct timeout nfs_timer_to; 1050 1051 nfsrtt.pos = 0; 1052 rpc_vers = txdr_unsigned(RPC_VER2); 1053 rpc_call = txdr_unsigned(RPC_CALL); 1054 rpc_reply = txdr_unsigned(RPC_REPLY); 1055 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1056 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1057 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1058 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1059 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1060 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1061 nfs_prog = txdr_unsigned(NFS_PROG); 1062 nfs_true = txdr_unsigned(TRUE); 1063 nfs_false = txdr_unsigned(FALSE); 1064 nfs_xdrneg1 = txdr_unsigned(-1); 1065 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1066 if (nfs_ticks < 1) 1067 nfs_ticks = 1; 1068 #ifdef NFSSERVER 1069 nfsrv_init(0); /* Init server data structures */ 1070 nfsrv_initcache(); /* Init the server request cache */ 1071 #endif /* NFSSERVER */ 1072 1073 /* 1074 * Initialize reply list and start timer 1075 */ 1076 TAILQ_INIT(&nfs_reqq); 1077 1078 timeout_set(&nfs_timer_to, nfs_timer, &nfs_timer_to); 1079 nfs_timer(&nfs_timer_to); 1080 } 1081 1082 #ifdef NFSCLIENT 1083 int 1084 nfs_vfs_init(vfsp) 1085 struct vfsconf *vfsp; 1086 { 1087 register int i; 1088 1089 /* Ensure async daemons disabled */ 1090 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) 1091 nfs_iodwant[i] = (struct proc *)0; 1092 TAILQ_INIT(&nfs_bufq); 1093 nfs_nhinit(); /* Init the nfsnode table */ 1094 1095 return (0); 1096 } 1097 1098 /* 1099 * Attribute cache routines. 1100 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1101 * that are on the mbuf list 1102 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1103 * error otherwise 1104 */ 1105 1106 /* 1107 * Load the attribute cache (that lives in the nfsnode entry) with 1108 * the values on the mbuf list and 1109 * Iff vap not NULL 1110 * copy the attributes to *vaper 1111 */ 1112 int 1113 nfs_loadattrcache(vpp, mdp, dposp, vaper) 1114 struct vnode **vpp; 1115 struct mbuf **mdp; 1116 caddr_t *dposp; 1117 struct vattr *vaper; 1118 { 1119 register struct vnode *vp = *vpp; 1120 register struct vattr *vap; 1121 register struct nfs_fattr *fp; 1122 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1123 register struct nfsnode *np; 1124 register int32_t t1; 1125 caddr_t cp2; 1126 int error = 0; 1127 int32_t rdev; 1128 struct mbuf *md; 1129 enum vtype vtyp; 1130 u_short vmode; 1131 struct timespec mtime; 1132 struct vnode *nvp; 1133 int v3 = NFS_ISV3(vp); 1134 1135 md = *mdp; 1136 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1137 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1138 if (error) 1139 return (error); 1140 fp = (struct nfs_fattr *)cp2; 1141 if (v3) { 1142 vtyp = nfsv3tov_type(fp->fa_type); 1143 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1144 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1145 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1146 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1147 } else { 1148 vtyp = nfsv2tov_type(fp->fa_type); 1149 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1150 if (vtyp == VNON || vtyp == VREG) 1151 vtyp = IFTOVT(vmode); 1152 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1153 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1154 1155 /* 1156 * Really ugly NFSv2 kludge. 1157 */ 1158 if (vtyp == VCHR && rdev == 0xffffffff) 1159 vtyp = VFIFO; 1160 } 1161 1162 /* 1163 * If v_type == VNON it is a new node, so fill in the v_type, 1164 * n_mtime fields. Check to see if it represents a special 1165 * device, and if so, check for a possible alias. Once the 1166 * correct vnode has been obtained, fill in the rest of the 1167 * information. 1168 */ 1169 np = VTONFS(vp); 1170 if (vp->v_type != vtyp) { 1171 vp->v_type = vtyp; 1172 if (vp->v_type == VFIFO) { 1173 #ifndef FIFO 1174 return (EOPNOTSUPP); 1175 #else 1176 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1177 vp->v_op = fifo_nfsv2nodeop_p; 1178 #endif /* FIFO */ 1179 } 1180 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1181 vp->v_op = spec_nfsv2nodeop_p; 1182 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1183 if (nvp) { 1184 /* 1185 * Discard unneeded vnode, but save its nfsnode. 1186 * Since the nfsnode does not have a lock, its 1187 * vnode lock has to be carried over. 1188 */ 1189 1190 nvp->v_vnlock = vp->v_vnlock; 1191 vp->v_vnlock = NULL; 1192 nvp->v_data = vp->v_data; 1193 vp->v_data = NULL; 1194 vp->v_op = spec_vnodeop_p; 1195 vrele(vp); 1196 vgone(vp); 1197 /* 1198 * Reinitialize aliased node. 1199 */ 1200 np->n_vnode = nvp; 1201 *vpp = vp = nvp; 1202 } 1203 } 1204 np->n_mtime = mtime.tv_sec; 1205 } 1206 vap = &np->n_vattr; 1207 vap->va_type = vtyp; 1208 vap->va_mode = (vmode & 07777); 1209 vap->va_rdev = (dev_t)rdev; 1210 vap->va_mtime = mtime; 1211 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1212 if (v3) { 1213 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1214 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1215 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1216 vap->va_size = fxdr_hyper(&fp->fa3_size); 1217 vap->va_blocksize = NFS_FABLKSIZE; 1218 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1219 vap->va_fileid = fxdr_unsigned(int32_t, 1220 fp->fa3_fileid.nfsuquad[1]); 1221 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1222 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1223 vap->va_flags = 0; 1224 vap->va_filerev = 0; 1225 } else { 1226 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1227 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1228 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1229 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1230 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize); 1231 vap->va_bytes = 1232 (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) * 1233 NFS_FABLKSIZE; 1234 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1235 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1236 vap->va_flags = 0; 1237 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1238 fp->fa2_ctime.nfsv2_sec); 1239 vap->va_ctime.tv_nsec = 0; 1240 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1241 vap->va_filerev = 0; 1242 } 1243 if (vap->va_size != np->n_size) { 1244 if (vap->va_type == VREG) { 1245 if (np->n_flag & NMODIFIED) { 1246 if (vap->va_size < np->n_size) 1247 vap->va_size = np->n_size; 1248 else 1249 np->n_size = vap->va_size; 1250 } else 1251 np->n_size = vap->va_size; 1252 uvm_vnp_setsize(vp, np->n_size); 1253 } else 1254 np->n_size = vap->va_size; 1255 } 1256 np->n_attrstamp = time.tv_sec; 1257 if (vaper != NULL) { 1258 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap)); 1259 if (np->n_flag & NCHG) { 1260 if (np->n_flag & NACC) 1261 vaper->va_atime = np->n_atim; 1262 if (np->n_flag & NUPD) 1263 vaper->va_mtime = np->n_mtim; 1264 } 1265 } 1266 return (0); 1267 } 1268 1269 INLINE int 1270 nfs_attrtimeo (np) 1271 struct nfsnode *np; 1272 { 1273 struct vnode *vp = np->n_vnode; 1274 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1275 int tenthage = (time.tv_sec - np->n_mtime) / 10; 1276 int minto, maxto; 1277 1278 if (vp->v_type == VDIR) { 1279 maxto = nmp->nm_acdirmax; 1280 minto = nmp->nm_acdirmin; 1281 } 1282 else { 1283 maxto = nmp->nm_acregmax; 1284 minto = nmp->nm_acregmin; 1285 } 1286 1287 if (np->n_flag & NMODIFIED || tenthage < minto) 1288 return minto; 1289 else if (tenthage < maxto) 1290 return tenthage; 1291 else 1292 return maxto; 1293 } 1294 1295 /* 1296 * Check the time stamp 1297 * If the cache is valid, copy contents to *vap and return 0 1298 * otherwise return an error 1299 */ 1300 int 1301 nfs_getattrcache(vp, vaper) 1302 register struct vnode *vp; 1303 struct vattr *vaper; 1304 { 1305 register struct nfsnode *np = VTONFS(vp); 1306 register struct vattr *vap; 1307 1308 if ((time.tv_sec - np->n_attrstamp) >= nfs_attrtimeo(np)) { 1309 nfsstats.attrcache_misses++; 1310 return (ENOENT); 1311 } 1312 nfsstats.attrcache_hits++; 1313 vap = &np->n_vattr; 1314 if (vap->va_size != np->n_size) { 1315 if (vap->va_type == VREG) { 1316 if (np->n_flag & NMODIFIED) { 1317 if (vap->va_size < np->n_size) 1318 vap->va_size = np->n_size; 1319 else 1320 np->n_size = vap->va_size; 1321 } else 1322 np->n_size = vap->va_size; 1323 uvm_vnp_setsize(vp, np->n_size); 1324 } else 1325 np->n_size = vap->va_size; 1326 } 1327 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr)); 1328 if (np->n_flag & NCHG) { 1329 if (np->n_flag & NACC) 1330 vaper->va_atime = np->n_atim; 1331 if (np->n_flag & NUPD) 1332 vaper->va_mtime = np->n_mtim; 1333 } 1334 return (0); 1335 } 1336 #endif /* NFSCLIENT */ 1337 1338 /* 1339 * Set up nameidata for a lookup() call and do it 1340 */ 1341 int 1342 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag) 1343 register struct nameidata *ndp; 1344 fhandle_t *fhp; 1345 int len; 1346 struct nfssvc_sock *slp; 1347 struct mbuf *nam; 1348 struct mbuf **mdp; 1349 caddr_t *dposp; 1350 struct vnode **retdirp; 1351 struct proc *p; 1352 int kerbflag; 1353 { 1354 register int i, rem; 1355 register struct mbuf *md; 1356 register char *fromcp, *tocp; 1357 struct vnode *dp; 1358 int error, rdonly; 1359 struct componentname *cnp = &ndp->ni_cnd; 1360 1361 *retdirp = (struct vnode *)0; 1362 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1363 /* 1364 * Copy the name from the mbuf list to ndp->ni_pnbuf 1365 * and set the various ndp fields appropriately. 1366 */ 1367 fromcp = *dposp; 1368 tocp = cnp->cn_pnbuf; 1369 md = *mdp; 1370 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1371 cnp->cn_hash = 0; 1372 for (i = 0; i < len; i++) { 1373 while (rem == 0) { 1374 md = md->m_next; 1375 if (md == NULL) { 1376 error = EBADRPC; 1377 goto out; 1378 } 1379 fromcp = mtod(md, caddr_t); 1380 rem = md->m_len; 1381 } 1382 if (*fromcp == '\0' || *fromcp == '/') { 1383 error = EACCES; 1384 goto out; 1385 } 1386 cnp->cn_hash += (u_char)*fromcp; 1387 *tocp++ = *fromcp++; 1388 rem--; 1389 } 1390 *tocp = '\0'; 1391 *mdp = md; 1392 *dposp = fromcp; 1393 len = nfsm_rndup(len)-len; 1394 if (len > 0) { 1395 if (rem >= len) 1396 *dposp += len; 1397 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1398 goto out; 1399 } 1400 ndp->ni_pathlen = tocp - cnp->cn_pnbuf; 1401 cnp->cn_nameptr = cnp->cn_pnbuf; 1402 /* 1403 * Extract and set starting directory. 1404 */ 1405 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1406 nam, &rdonly, kerbflag); 1407 if (error) 1408 goto out; 1409 if (dp->v_type != VDIR) { 1410 vrele(dp); 1411 error = ENOTDIR; 1412 goto out; 1413 } 1414 VREF(dp); 1415 *retdirp = dp; 1416 ndp->ni_startdir = dp; 1417 if (rdonly) 1418 cnp->cn_flags |= (NOCROSSMOUNT | RDONLY); 1419 else 1420 cnp->cn_flags |= NOCROSSMOUNT; 1421 /* 1422 * And call lookup() to do the real work 1423 */ 1424 cnp->cn_proc = p; 1425 error = lookup(ndp); 1426 if (error) 1427 goto out; 1428 /* 1429 * Check for encountering a symbolic link 1430 */ 1431 if (cnp->cn_flags & ISSYMLINK) { 1432 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1433 vput(ndp->ni_dvp); 1434 else 1435 vrele(ndp->ni_dvp); 1436 vput(ndp->ni_vp); 1437 ndp->ni_vp = NULL; 1438 error = EINVAL; 1439 goto out; 1440 } 1441 /* 1442 * Check for saved name request 1443 */ 1444 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1445 cnp->cn_flags |= HASBUF; 1446 return (0); 1447 } 1448 out: 1449 FREE(cnp->cn_pnbuf, M_NAMEI); 1450 return (error); 1451 } 1452 1453 /* 1454 * A fiddled version of m_adj() that ensures null fill to a long 1455 * boundary and only trims off the back end 1456 */ 1457 void 1458 nfsm_adj(mp, len, nul) 1459 struct mbuf *mp; 1460 register int len; 1461 int nul; 1462 { 1463 register struct mbuf *m; 1464 register int count, i; 1465 register char *cp; 1466 1467 /* 1468 * Trim from tail. Scan the mbuf chain, 1469 * calculating its length and finding the last mbuf. 1470 * If the adjustment only affects this mbuf, then just 1471 * adjust and return. Otherwise, rescan and truncate 1472 * after the remaining size. 1473 */ 1474 count = 0; 1475 m = mp; 1476 for (;;) { 1477 count += m->m_len; 1478 if (m->m_next == (struct mbuf *)0) 1479 break; 1480 m = m->m_next; 1481 } 1482 if (m->m_len > len) { 1483 m->m_len -= len; 1484 if (nul > 0) { 1485 cp = mtod(m, caddr_t)+m->m_len-nul; 1486 for (i = 0; i < nul; i++) 1487 *cp++ = '\0'; 1488 } 1489 return; 1490 } 1491 count -= len; 1492 if (count < 0) 1493 count = 0; 1494 /* 1495 * Correct length for chain is "count". 1496 * Find the mbuf with last data, adjust its length, 1497 * and toss data from remaining mbufs on chain. 1498 */ 1499 for (m = mp; m; m = m->m_next) { 1500 if (m->m_len >= count) { 1501 m->m_len = count; 1502 if (nul > 0) { 1503 cp = mtod(m, caddr_t)+m->m_len-nul; 1504 for (i = 0; i < nul; i++) 1505 *cp++ = '\0'; 1506 } 1507 break; 1508 } 1509 count -= m->m_len; 1510 } 1511 for (m = m->m_next;m;m = m->m_next) 1512 m->m_len = 0; 1513 } 1514 1515 /* 1516 * Make these functions instead of macros, so that the kernel text size 1517 * doesn't get too big... 1518 */ 1519 void 1520 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 1521 struct nfsrv_descript *nfsd; 1522 int before_ret; 1523 register struct vattr *before_vap; 1524 int after_ret; 1525 struct vattr *after_vap; 1526 struct mbuf **mbp; 1527 char **bposp; 1528 { 1529 register struct mbuf *mb = *mbp, *mb2; 1530 register char *bpos = *bposp; 1531 register u_int32_t *tl; 1532 1533 if (before_ret) { 1534 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1535 *tl = nfs_false; 1536 } else { 1537 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 1538 *tl++ = nfs_true; 1539 txdr_hyper(before_vap->va_size, tl); 1540 tl += 2; 1541 txdr_nfsv3time(&(before_vap->va_mtime), tl); 1542 tl += 2; 1543 txdr_nfsv3time(&(before_vap->va_ctime), tl); 1544 } 1545 *bposp = bpos; 1546 *mbp = mb; 1547 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 1548 } 1549 1550 void 1551 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 1552 struct nfsrv_descript *nfsd; 1553 int after_ret; 1554 struct vattr *after_vap; 1555 struct mbuf **mbp; 1556 char **bposp; 1557 { 1558 register struct mbuf *mb = *mbp, *mb2; 1559 register char *bpos = *bposp; 1560 register u_int32_t *tl; 1561 register struct nfs_fattr *fp; 1562 1563 if (after_ret) { 1564 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 1565 *tl = nfs_false; 1566 } else { 1567 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 1568 *tl++ = nfs_true; 1569 fp = (struct nfs_fattr *)tl; 1570 nfsm_srvfattr(nfsd, after_vap, fp); 1571 } 1572 *mbp = mb; 1573 *bposp = bpos; 1574 } 1575 1576 void 1577 nfsm_srvfattr(nfsd, vap, fp) 1578 register struct nfsrv_descript *nfsd; 1579 register struct vattr *vap; 1580 register struct nfs_fattr *fp; 1581 { 1582 1583 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 1584 fp->fa_uid = txdr_unsigned(vap->va_uid); 1585 fp->fa_gid = txdr_unsigned(vap->va_gid); 1586 if (nfsd->nd_flag & ND_NFSV3) { 1587 fp->fa_type = vtonfsv3_type(vap->va_type); 1588 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 1589 txdr_hyper(vap->va_size, &fp->fa3_size); 1590 txdr_hyper(vap->va_bytes, &fp->fa3_used); 1591 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 1592 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 1593 fp->fa3_fsid.nfsuquad[0] = 0; 1594 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 1595 fp->fa3_fileid.nfsuquad[0] = 0; 1596 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 1597 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 1598 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 1599 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 1600 } else { 1601 fp->fa_type = vtonfsv2_type(vap->va_type); 1602 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 1603 fp->fa2_size = txdr_unsigned(vap->va_size); 1604 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 1605 if (vap->va_type == VFIFO) 1606 fp->fa2_rdev = 0xffffffff; 1607 else 1608 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 1609 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 1610 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 1611 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 1612 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 1613 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 1614 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 1615 } 1616 } 1617 1618 /* 1619 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 1620 * - look up fsid in mount list (if not found ret error) 1621 * - get vp and export rights by calling VFS_FHTOVP() and VFS_CHECKEXP() 1622 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 1623 * - if not lockflag unlock it with VOP_UNLOCK() 1624 */ 1625 int 1626 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag) 1627 fhandle_t *fhp; 1628 int lockflag; 1629 struct vnode **vpp; 1630 struct ucred *cred; 1631 struct nfssvc_sock *slp; 1632 struct mbuf *nam; 1633 int *rdonlyp; 1634 int kerbflag; 1635 { 1636 struct proc *p = curproc; /* XXX */ 1637 register struct mount *mp; 1638 register int i; 1639 struct ucred *credanon; 1640 int error, exflags; 1641 struct sockaddr_in *saddr; 1642 1643 *vpp = (struct vnode *)0; 1644 mp = vfs_getvfs(&fhp->fh_fsid); 1645 1646 if (!mp) 1647 return (ESTALE); 1648 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 1649 if (error) 1650 return (error); 1651 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 1652 if (error) 1653 return (error); 1654 1655 saddr = mtod(nam, struct sockaddr_in *); 1656 if (saddr->sin_family == AF_INET && 1657 (ntohs(saddr->sin_port) >= IPPORT_RESERVED || 1658 (slp->ns_so->so_type == SOCK_STREAM && ntohs(saddr->sin_port) == 20))) { 1659 vput(*vpp); 1660 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1661 } 1662 1663 /* 1664 * Check/setup credentials. 1665 */ 1666 if (exflags & MNT_EXKERB) { 1667 if (!kerbflag) { 1668 vput(*vpp); 1669 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1670 } 1671 } else if (kerbflag) { 1672 vput(*vpp); 1673 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 1674 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 1675 cred->cr_uid = credanon->cr_uid; 1676 cred->cr_gid = credanon->cr_gid; 1677 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 1678 cred->cr_groups[i] = credanon->cr_groups[i]; 1679 cred->cr_ngroups = i; 1680 } 1681 if (exflags & MNT_EXRDONLY) 1682 *rdonlyp = 1; 1683 else 1684 *rdonlyp = 0; 1685 if (!lockflag) 1686 VOP_UNLOCK(*vpp, 0, p); 1687 1688 return (0); 1689 } 1690 1691 /* 1692 * This function compares two net addresses by family and returns TRUE 1693 * if they are the same host. 1694 * If there is any doubt, return FALSE. 1695 * The AF_INET family is handled as a special case so that address mbufs 1696 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 1697 */ 1698 int 1699 netaddr_match(family, haddr, nam) 1700 int family; 1701 union nethostaddr *haddr; 1702 struct mbuf *nam; 1703 { 1704 register struct sockaddr_in *inetaddr; 1705 1706 switch (family) { 1707 case AF_INET: 1708 inetaddr = mtod(nam, struct sockaddr_in *); 1709 if (inetaddr->sin_family == AF_INET && 1710 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 1711 return (1); 1712 break; 1713 #ifdef ISO 1714 case AF_ISO: 1715 { 1716 register struct sockaddr_iso *isoaddr1, *isoaddr2; 1717 1718 isoaddr1 = mtod(nam, struct sockaddr_iso *); 1719 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 1720 if (isoaddr1->siso_family == AF_ISO && 1721 isoaddr1->siso_nlen > 0 && 1722 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 1723 SAME_ISOADDR(isoaddr1, isoaddr2)) 1724 return (1); 1725 break; 1726 } 1727 #endif /* ISO */ 1728 default: 1729 break; 1730 }; 1731 return (0); 1732 } 1733 1734 /* 1735 * The write verifier has changed (probably due to a server reboot), so all 1736 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 1737 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 1738 * flag. Once done the new write verifier can be set for the mount point. 1739 */ 1740 void 1741 nfs_clearcommit(mp) 1742 struct mount *mp; 1743 { 1744 register struct vnode *vp, *nvp; 1745 register struct buf *bp, *nbp; 1746 int s; 1747 1748 s = splbio(); 1749 loop: 1750 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 1751 if (vp->v_mount != mp) /* Paranoia */ 1752 goto loop; 1753 nvp = vp->v_mntvnodes.le_next; 1754 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 1755 nbp = bp->b_vnbufs.le_next; 1756 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 1757 == (B_DELWRI | B_NEEDCOMMIT)) 1758 bp->b_flags &= ~B_NEEDCOMMIT; 1759 } 1760 } 1761 splx(s); 1762 } 1763 1764 /* 1765 * Map errnos to NFS error numbers. For Version 3 also filter out error 1766 * numbers not specified for the associated procedure. 1767 */ 1768 int 1769 nfsrv_errmap(nd, err) 1770 struct nfsrv_descript *nd; 1771 register int err; 1772 { 1773 register short *defaulterrp, *errp; 1774 1775 if (nd->nd_flag & ND_NFSV3) { 1776 if (nd->nd_procnum <= NFSPROC_COMMIT) { 1777 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 1778 while (*++errp) { 1779 if (*errp == err) 1780 return (err); 1781 else if (*errp > err) 1782 break; 1783 } 1784 return ((int)*defaulterrp); 1785 } else 1786 return (err & 0xffff); 1787 } 1788 if (err <= ELAST) 1789 return ((int)nfsrv_v2errmap[err - 1]); 1790 return (NFSERR_IO); 1791 } 1792 1793 /* 1794 * Sort the group list in increasing numerical order. 1795 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 1796 * that used to be here.) 1797 */ 1798 void 1799 nfsrvw_sort(list, num) 1800 register gid_t *list; 1801 register int num; 1802 { 1803 register int i, j; 1804 gid_t v; 1805 1806 /* Insertion sort. */ 1807 for (i = 1; i < num; i++) { 1808 v = list[i]; 1809 /* find correct slot for value v, moving others up */ 1810 for (j = i; --j >= 0 && v < list[j];) 1811 list[j + 1] = list[j]; 1812 list[j + 1] = v; 1813 } 1814 } 1815 1816 /* 1817 * copy credentials making sure that the result can be compared with bcmp(). 1818 */ 1819 void 1820 nfsrv_setcred(incred, outcred) 1821 register struct ucred *incred, *outcred; 1822 { 1823 register int i; 1824 1825 bzero((caddr_t)outcred, sizeof (struct ucred)); 1826 outcred->cr_ref = 1; 1827 outcred->cr_uid = incred->cr_uid; 1828 outcred->cr_gid = incred->cr_gid; 1829 outcred->cr_ngroups = incred->cr_ngroups; 1830 for (i = 0; i < incred->cr_ngroups; i++) 1831 outcred->cr_groups[i] = incred->cr_groups[i]; 1832 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 1833 } 1834