nfs_subs.c revision 1.67
1 /* $NetBSD: nfs_subs.c,v 1.67 1999/03/16 23:22:57 fvdl Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95 39 */ 40 41 #include "fs_nfs.h" 42 #include "opt_nfsserver.h" 43 #include "opt_iso.h" 44 #include "opt_uvm.h" 45 46 /* 47 * These functions support the macros and help fiddle mbuf chains for 48 * the nfs op functions. They do things like create the rpc header and 49 * copy data between mbuf chains and uio lists. 50 */ 51 #include <sys/param.h> 52 #include <sys/proc.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/mount.h> 56 #include <sys/vnode.h> 57 #include <sys/namei.h> 58 #include <sys/mbuf.h> 59 #include <sys/socket.h> 60 #include <sys/stat.h> 61 #include <sys/malloc.h> 62 #include <sys/time.h> 63 #include <sys/dirent.h> 64 65 #include <vm/vm.h> 66 67 #if defined(UVM) 68 #include <uvm/uvm_extern.h> 69 #endif 70 71 #include <nfs/rpcv2.h> 72 #include <nfs/nfsproto.h> 73 #include <nfs/nfsnode.h> 74 #include <nfs/nfs.h> 75 #include <nfs/xdr_subs.h> 76 #include <nfs/nfsm_subs.h> 77 #include <nfs/nfsmount.h> 78 #include <nfs/nqnfs.h> 79 #include <nfs/nfsrtt.h> 80 #include <nfs/nfs_var.h> 81 82 #include <miscfs/specfs/specdev.h> 83 84 #include <vm/vm.h> 85 86 #include <netinet/in.h> 87 #ifdef ISO 88 #include <netiso/iso.h> 89 #endif 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, nqnfs_prog, nfs_true, nfs_false; 100 101 /* And other global data */ 102 static u_int32_t nfs_xid = 0; 103 nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, 104 NFCHR, NFNON }; 105 nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, 106 NFFIFO, NFNON }; 107 enum vtype nv2tov_type[8] = { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON }; 108 enum vtype nv3tov_type[8]={ VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO }; 109 int nfs_ticks; 110 extern struct nfs_public nfs_pub; 111 112 /* NFS client/server stats. */ 113 struct nfsstats nfsstats; 114 115 /* 116 * Mapping of old NFS Version 2 RPC numbers to generic numbers. 117 */ 118 int nfsv3_procid[NFS_NPROCS] = { 119 NFSPROC_NULL, 120 NFSPROC_GETATTR, 121 NFSPROC_SETATTR, 122 NFSPROC_NOOP, 123 NFSPROC_LOOKUP, 124 NFSPROC_READLINK, 125 NFSPROC_READ, 126 NFSPROC_NOOP, 127 NFSPROC_WRITE, 128 NFSPROC_CREATE, 129 NFSPROC_REMOVE, 130 NFSPROC_RENAME, 131 NFSPROC_LINK, 132 NFSPROC_SYMLINK, 133 NFSPROC_MKDIR, 134 NFSPROC_RMDIR, 135 NFSPROC_READDIR, 136 NFSPROC_FSSTAT, 137 NFSPROC_NOOP, 138 NFSPROC_NOOP, 139 NFSPROC_NOOP, 140 NFSPROC_NOOP, 141 NFSPROC_NOOP, 142 NFSPROC_NOOP, 143 NFSPROC_NOOP, 144 NFSPROC_NOOP 145 }; 146 147 /* 148 * and the reverse mapping from generic to Version 2 procedure numbers 149 */ 150 int nfsv2_procid[NFS_NPROCS] = { 151 NFSV2PROC_NULL, 152 NFSV2PROC_GETATTR, 153 NFSV2PROC_SETATTR, 154 NFSV2PROC_LOOKUP, 155 NFSV2PROC_NOOP, 156 NFSV2PROC_READLINK, 157 NFSV2PROC_READ, 158 NFSV2PROC_WRITE, 159 NFSV2PROC_CREATE, 160 NFSV2PROC_MKDIR, 161 NFSV2PROC_SYMLINK, 162 NFSV2PROC_CREATE, 163 NFSV2PROC_REMOVE, 164 NFSV2PROC_RMDIR, 165 NFSV2PROC_RENAME, 166 NFSV2PROC_LINK, 167 NFSV2PROC_READDIR, 168 NFSV2PROC_NOOP, 169 NFSV2PROC_STATFS, 170 NFSV2PROC_NOOP, 171 NFSV2PROC_NOOP, 172 NFSV2PROC_NOOP, 173 NFSV2PROC_NOOP, 174 NFSV2PROC_NOOP, 175 NFSV2PROC_NOOP, 176 NFSV2PROC_NOOP, 177 }; 178 179 /* 180 * Maps errno values to nfs error numbers. 181 * Use NFSERR_IO as the catch all for ones not specifically defined in 182 * RFC 1094. 183 */ 184 static u_char nfsrv_v2errmap[ELAST] = { 185 NFSERR_PERM, NFSERR_NOENT, NFSERR_IO, NFSERR_IO, NFSERR_IO, 186 NFSERR_NXIO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 187 NFSERR_IO, NFSERR_IO, NFSERR_ACCES, NFSERR_IO, NFSERR_IO, 188 NFSERR_IO, NFSERR_EXIST, NFSERR_IO, NFSERR_NODEV, NFSERR_NOTDIR, 189 NFSERR_ISDIR, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 190 NFSERR_IO, NFSERR_FBIG, NFSERR_NOSPC, NFSERR_IO, NFSERR_ROFS, 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_IO, NFSERR_IO, NFSERR_IO, 195 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 196 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 197 NFSERR_IO, NFSERR_IO, NFSERR_NAMETOL, NFSERR_IO, NFSERR_IO, 198 NFSERR_NOTEMPTY, NFSERR_IO, NFSERR_IO, NFSERR_DQUOT, NFSERR_STALE, 199 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 200 NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, NFSERR_IO, 201 NFSERR_IO, NFSERR_IO, 202 }; 203 204 /* 205 * Maps errno values to nfs error numbers. 206 * Although it is not obvious whether or not NFS clients really care if 207 * a returned error value is in the specified list for the procedure, the 208 * safest thing to do is filter them appropriately. For Version 2, the 209 * X/Open XNFS document is the only specification that defines error values 210 * for each RPC (The RFC simply lists all possible error values for all RPCs), 211 * so I have decided to not do this for Version 2. 212 * The first entry is the default error return and the rest are the valid 213 * errors for that RPC in increasing numeric order. 214 */ 215 static short nfsv3err_null[] = { 216 0, 217 0, 218 }; 219 220 static short nfsv3err_getattr[] = { 221 NFSERR_IO, 222 NFSERR_IO, 223 NFSERR_STALE, 224 NFSERR_BADHANDLE, 225 NFSERR_SERVERFAULT, 226 0, 227 }; 228 229 static short nfsv3err_setattr[] = { 230 NFSERR_IO, 231 NFSERR_PERM, 232 NFSERR_IO, 233 NFSERR_ACCES, 234 NFSERR_INVAL, 235 NFSERR_NOSPC, 236 NFSERR_ROFS, 237 NFSERR_DQUOT, 238 NFSERR_STALE, 239 NFSERR_BADHANDLE, 240 NFSERR_NOT_SYNC, 241 NFSERR_SERVERFAULT, 242 0, 243 }; 244 245 static short nfsv3err_lookup[] = { 246 NFSERR_IO, 247 NFSERR_NOENT, 248 NFSERR_IO, 249 NFSERR_ACCES, 250 NFSERR_NOTDIR, 251 NFSERR_NAMETOL, 252 NFSERR_STALE, 253 NFSERR_BADHANDLE, 254 NFSERR_SERVERFAULT, 255 0, 256 }; 257 258 static short nfsv3err_access[] = { 259 NFSERR_IO, 260 NFSERR_IO, 261 NFSERR_STALE, 262 NFSERR_BADHANDLE, 263 NFSERR_SERVERFAULT, 264 0, 265 }; 266 267 static short nfsv3err_readlink[] = { 268 NFSERR_IO, 269 NFSERR_IO, 270 NFSERR_ACCES, 271 NFSERR_INVAL, 272 NFSERR_STALE, 273 NFSERR_BADHANDLE, 274 NFSERR_NOTSUPP, 275 NFSERR_SERVERFAULT, 276 0, 277 }; 278 279 static short nfsv3err_read[] = { 280 NFSERR_IO, 281 NFSERR_IO, 282 NFSERR_NXIO, 283 NFSERR_ACCES, 284 NFSERR_INVAL, 285 NFSERR_STALE, 286 NFSERR_BADHANDLE, 287 NFSERR_SERVERFAULT, 288 NFSERR_JUKEBOX, 289 0, 290 }; 291 292 static short nfsv3err_write[] = { 293 NFSERR_IO, 294 NFSERR_IO, 295 NFSERR_ACCES, 296 NFSERR_INVAL, 297 NFSERR_FBIG, 298 NFSERR_NOSPC, 299 NFSERR_ROFS, 300 NFSERR_DQUOT, 301 NFSERR_STALE, 302 NFSERR_BADHANDLE, 303 NFSERR_SERVERFAULT, 304 0, 305 }; 306 307 static short nfsv3err_create[] = { 308 NFSERR_IO, 309 NFSERR_IO, 310 NFSERR_ACCES, 311 NFSERR_EXIST, 312 NFSERR_NOTDIR, 313 NFSERR_NOSPC, 314 NFSERR_ROFS, 315 NFSERR_NAMETOL, 316 NFSERR_DQUOT, 317 NFSERR_STALE, 318 NFSERR_BADHANDLE, 319 NFSERR_NOTSUPP, 320 NFSERR_SERVERFAULT, 321 0, 322 }; 323 324 static short nfsv3err_mkdir[] = { 325 NFSERR_IO, 326 NFSERR_IO, 327 NFSERR_ACCES, 328 NFSERR_EXIST, 329 NFSERR_NOTDIR, 330 NFSERR_NOSPC, 331 NFSERR_ROFS, 332 NFSERR_NAMETOL, 333 NFSERR_DQUOT, 334 NFSERR_STALE, 335 NFSERR_BADHANDLE, 336 NFSERR_NOTSUPP, 337 NFSERR_SERVERFAULT, 338 0, 339 }; 340 341 static short nfsv3err_symlink[] = { 342 NFSERR_IO, 343 NFSERR_IO, 344 NFSERR_ACCES, 345 NFSERR_EXIST, 346 NFSERR_NOTDIR, 347 NFSERR_NOSPC, 348 NFSERR_ROFS, 349 NFSERR_NAMETOL, 350 NFSERR_DQUOT, 351 NFSERR_STALE, 352 NFSERR_BADHANDLE, 353 NFSERR_NOTSUPP, 354 NFSERR_SERVERFAULT, 355 0, 356 }; 357 358 static short nfsv3err_mknod[] = { 359 NFSERR_IO, 360 NFSERR_IO, 361 NFSERR_ACCES, 362 NFSERR_EXIST, 363 NFSERR_NOTDIR, 364 NFSERR_NOSPC, 365 NFSERR_ROFS, 366 NFSERR_NAMETOL, 367 NFSERR_DQUOT, 368 NFSERR_STALE, 369 NFSERR_BADHANDLE, 370 NFSERR_NOTSUPP, 371 NFSERR_SERVERFAULT, 372 NFSERR_BADTYPE, 373 0, 374 }; 375 376 static short nfsv3err_remove[] = { 377 NFSERR_IO, 378 NFSERR_NOENT, 379 NFSERR_IO, 380 NFSERR_ACCES, 381 NFSERR_NOTDIR, 382 NFSERR_ROFS, 383 NFSERR_NAMETOL, 384 NFSERR_STALE, 385 NFSERR_BADHANDLE, 386 NFSERR_SERVERFAULT, 387 0, 388 }; 389 390 static short nfsv3err_rmdir[] = { 391 NFSERR_IO, 392 NFSERR_NOENT, 393 NFSERR_IO, 394 NFSERR_ACCES, 395 NFSERR_EXIST, 396 NFSERR_NOTDIR, 397 NFSERR_INVAL, 398 NFSERR_ROFS, 399 NFSERR_NAMETOL, 400 NFSERR_NOTEMPTY, 401 NFSERR_STALE, 402 NFSERR_BADHANDLE, 403 NFSERR_NOTSUPP, 404 NFSERR_SERVERFAULT, 405 0, 406 }; 407 408 static short nfsv3err_rename[] = { 409 NFSERR_IO, 410 NFSERR_NOENT, 411 NFSERR_IO, 412 NFSERR_ACCES, 413 NFSERR_EXIST, 414 NFSERR_XDEV, 415 NFSERR_NOTDIR, 416 NFSERR_ISDIR, 417 NFSERR_INVAL, 418 NFSERR_NOSPC, 419 NFSERR_ROFS, 420 NFSERR_MLINK, 421 NFSERR_NAMETOL, 422 NFSERR_NOTEMPTY, 423 NFSERR_DQUOT, 424 NFSERR_STALE, 425 NFSERR_BADHANDLE, 426 NFSERR_NOTSUPP, 427 NFSERR_SERVERFAULT, 428 0, 429 }; 430 431 static short nfsv3err_link[] = { 432 NFSERR_IO, 433 NFSERR_IO, 434 NFSERR_ACCES, 435 NFSERR_EXIST, 436 NFSERR_XDEV, 437 NFSERR_NOTDIR, 438 NFSERR_INVAL, 439 NFSERR_NOSPC, 440 NFSERR_ROFS, 441 NFSERR_MLINK, 442 NFSERR_NAMETOL, 443 NFSERR_DQUOT, 444 NFSERR_STALE, 445 NFSERR_BADHANDLE, 446 NFSERR_NOTSUPP, 447 NFSERR_SERVERFAULT, 448 0, 449 }; 450 451 static short nfsv3err_readdir[] = { 452 NFSERR_IO, 453 NFSERR_IO, 454 NFSERR_ACCES, 455 NFSERR_NOTDIR, 456 NFSERR_STALE, 457 NFSERR_BADHANDLE, 458 NFSERR_BAD_COOKIE, 459 NFSERR_TOOSMALL, 460 NFSERR_SERVERFAULT, 461 0, 462 }; 463 464 static short nfsv3err_readdirplus[] = { 465 NFSERR_IO, 466 NFSERR_IO, 467 NFSERR_ACCES, 468 NFSERR_NOTDIR, 469 NFSERR_STALE, 470 NFSERR_BADHANDLE, 471 NFSERR_BAD_COOKIE, 472 NFSERR_NOTSUPP, 473 NFSERR_TOOSMALL, 474 NFSERR_SERVERFAULT, 475 0, 476 }; 477 478 static short nfsv3err_fsstat[] = { 479 NFSERR_IO, 480 NFSERR_IO, 481 NFSERR_STALE, 482 NFSERR_BADHANDLE, 483 NFSERR_SERVERFAULT, 484 0, 485 }; 486 487 static short nfsv3err_fsinfo[] = { 488 NFSERR_STALE, 489 NFSERR_STALE, 490 NFSERR_BADHANDLE, 491 NFSERR_SERVERFAULT, 492 0, 493 }; 494 495 static short nfsv3err_pathconf[] = { 496 NFSERR_STALE, 497 NFSERR_STALE, 498 NFSERR_BADHANDLE, 499 NFSERR_SERVERFAULT, 500 0, 501 }; 502 503 static short nfsv3err_commit[] = { 504 NFSERR_IO, 505 NFSERR_IO, 506 NFSERR_STALE, 507 NFSERR_BADHANDLE, 508 NFSERR_SERVERFAULT, 509 0, 510 }; 511 512 static short *nfsrv_v3errmap[] = { 513 nfsv3err_null, 514 nfsv3err_getattr, 515 nfsv3err_setattr, 516 nfsv3err_lookup, 517 nfsv3err_access, 518 nfsv3err_readlink, 519 nfsv3err_read, 520 nfsv3err_write, 521 nfsv3err_create, 522 nfsv3err_mkdir, 523 nfsv3err_symlink, 524 nfsv3err_mknod, 525 nfsv3err_remove, 526 nfsv3err_rmdir, 527 nfsv3err_rename, 528 nfsv3err_link, 529 nfsv3err_readdir, 530 nfsv3err_readdirplus, 531 nfsv3err_fsstat, 532 nfsv3err_fsinfo, 533 nfsv3err_pathconf, 534 nfsv3err_commit, 535 }; 536 537 extern struct nfsrtt nfsrtt; 538 extern time_t nqnfsstarttime; 539 extern int nqsrv_clockskew; 540 extern int nqsrv_writeslack; 541 extern int nqsrv_maxlease; 542 extern int nqnfs_piggy[NFS_NPROCS]; 543 extern nfstype nfsv2_type[9]; 544 extern nfstype nfsv3_type[9]; 545 extern struct nfsnodehashhead *nfsnodehashtbl; 546 extern u_long nfsnodehash; 547 548 LIST_HEAD(nfsnodehashhead, nfsnode); 549 u_long nfsdirhashmask; 550 551 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 552 553 /* 554 * Create the header for an rpc request packet 555 * The hsiz is the size of the rest of the nfs request header. 556 * (just used to decide if a cluster is a good idea) 557 */ 558 struct mbuf * 559 nfsm_reqh(vp, procid, hsiz, bposp) 560 struct vnode *vp; 561 u_long procid; 562 int hsiz; 563 caddr_t *bposp; 564 { 565 register struct mbuf *mb; 566 register u_int32_t *tl; 567 register caddr_t bpos; 568 struct mbuf *mb2; 569 struct nfsmount *nmp; 570 int nqflag; 571 572 MGET(mb, M_WAIT, MT_DATA); 573 if (hsiz >= MINCLSIZE) 574 MCLGET(mb, M_WAIT); 575 mb->m_len = 0; 576 bpos = mtod(mb, caddr_t); 577 578 /* 579 * For NQNFS, add lease request. 580 */ 581 if (vp) { 582 nmp = VFSTONFS(vp->v_mount); 583 if (nmp->nm_flag & NFSMNT_NQNFS) { 584 nqflag = NQNFS_NEEDLEASE(vp, procid); 585 if (nqflag) { 586 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 587 *tl++ = txdr_unsigned(nqflag); 588 *tl = txdr_unsigned(nmp->nm_leaseterm); 589 } else { 590 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 591 *tl = 0; 592 } 593 } 594 } 595 /* Finally, return values */ 596 *bposp = bpos; 597 return (mb); 598 } 599 600 /* 601 * Build the RPC header and fill in the authorization info. 602 * The authorization string argument is only used when the credentials 603 * come from outside of the kernel. 604 * Returns the head of the mbuf list. 605 */ 606 struct mbuf * 607 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 608 verf_str, mrest, mrest_len, mbp, xidp) 609 register struct ucred *cr; 610 int nmflag; 611 int procid; 612 int auth_type; 613 int auth_len; 614 char *auth_str; 615 int verf_len; 616 char *verf_str; 617 struct mbuf *mrest; 618 int mrest_len; 619 struct mbuf **mbp; 620 u_int32_t *xidp; 621 { 622 register struct mbuf *mb; 623 register u_int32_t *tl; 624 register caddr_t bpos; 625 register int i; 626 struct mbuf *mreq, *mb2; 627 int siz, grpsiz, authsiz; 628 struct timeval tv; 629 static u_int32_t base; 630 631 authsiz = nfsm_rndup(auth_len); 632 MGETHDR(mb, M_WAIT, MT_DATA); 633 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 634 MCLGET(mb, M_WAIT); 635 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 636 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 637 } else { 638 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 639 } 640 mb->m_len = 0; 641 mreq = mb; 642 bpos = mtod(mb, caddr_t); 643 644 /* 645 * First the RPC header. 646 */ 647 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 648 649 /* 650 * derive initial xid from system time 651 * XXX time is invalid if root not yet mounted 652 */ 653 if (!base && (rootvp)) { 654 microtime(&tv); 655 base = tv.tv_sec << 12; 656 nfs_xid = base; 657 } 658 /* 659 * Skip zero xid if it should ever happen. 660 */ 661 if (++nfs_xid == 0) 662 nfs_xid++; 663 664 *tl++ = *xidp = txdr_unsigned(nfs_xid); 665 *tl++ = rpc_call; 666 *tl++ = rpc_vers; 667 if (nmflag & NFSMNT_NQNFS) { 668 *tl++ = txdr_unsigned(NQNFS_PROG); 669 *tl++ = txdr_unsigned(NQNFS_VER3); 670 } else { 671 *tl++ = txdr_unsigned(NFS_PROG); 672 if (nmflag & NFSMNT_NFSV3) 673 *tl++ = txdr_unsigned(NFS_VER3); 674 else 675 *tl++ = txdr_unsigned(NFS_VER2); 676 } 677 if (nmflag & NFSMNT_NFSV3) 678 *tl++ = txdr_unsigned(procid); 679 else 680 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 681 682 /* 683 * And then the authorization cred. 684 */ 685 *tl++ = txdr_unsigned(auth_type); 686 *tl = txdr_unsigned(authsiz); 687 switch (auth_type) { 688 case RPCAUTH_UNIX: 689 nfsm_build(tl, u_int32_t *, auth_len); 690 *tl++ = 0; /* stamp ?? */ 691 *tl++ = 0; /* NULL hostname */ 692 *tl++ = txdr_unsigned(cr->cr_uid); 693 *tl++ = txdr_unsigned(cr->cr_gid); 694 grpsiz = (auth_len >> 2) - 5; 695 *tl++ = txdr_unsigned(grpsiz); 696 for (i = 0; i < grpsiz; i++) 697 *tl++ = txdr_unsigned(cr->cr_groups[i]); 698 break; 699 case RPCAUTH_KERB4: 700 siz = auth_len; 701 while (siz > 0) { 702 if (M_TRAILINGSPACE(mb) == 0) { 703 MGET(mb2, M_WAIT, MT_DATA); 704 if (siz >= MINCLSIZE) 705 MCLGET(mb2, M_WAIT); 706 mb->m_next = mb2; 707 mb = mb2; 708 mb->m_len = 0; 709 bpos = mtod(mb, caddr_t); 710 } 711 i = min(siz, M_TRAILINGSPACE(mb)); 712 memcpy(bpos, auth_str, i); 713 mb->m_len += i; 714 auth_str += i; 715 bpos += i; 716 siz -= i; 717 } 718 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 719 for (i = 0; i < siz; i++) 720 *bpos++ = '\0'; 721 mb->m_len += siz; 722 } 723 break; 724 }; 725 726 /* 727 * And the verifier... 728 */ 729 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 730 if (verf_str) { 731 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 732 *tl = txdr_unsigned(verf_len); 733 siz = verf_len; 734 while (siz > 0) { 735 if (M_TRAILINGSPACE(mb) == 0) { 736 MGET(mb2, M_WAIT, MT_DATA); 737 if (siz >= MINCLSIZE) 738 MCLGET(mb2, M_WAIT); 739 mb->m_next = mb2; 740 mb = mb2; 741 mb->m_len = 0; 742 bpos = mtod(mb, caddr_t); 743 } 744 i = min(siz, M_TRAILINGSPACE(mb)); 745 memcpy(bpos, verf_str, i); 746 mb->m_len += i; 747 verf_str += i; 748 bpos += i; 749 siz -= i; 750 } 751 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 752 for (i = 0; i < siz; i++) 753 *bpos++ = '\0'; 754 mb->m_len += siz; 755 } 756 } else { 757 *tl++ = txdr_unsigned(RPCAUTH_NULL); 758 *tl = 0; 759 } 760 mb->m_next = mrest; 761 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 762 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 763 *mbp = mb; 764 return (mreq); 765 } 766 767 /* 768 * copies mbuf chain to the uio scatter/gather list 769 */ 770 int 771 nfsm_mbuftouio(mrep, uiop, siz, dpos) 772 struct mbuf **mrep; 773 register struct uio *uiop; 774 int siz; 775 caddr_t *dpos; 776 { 777 register char *mbufcp, *uiocp; 778 register int xfer, left, len; 779 register struct mbuf *mp; 780 long uiosiz, rem; 781 int error = 0; 782 783 mp = *mrep; 784 mbufcp = *dpos; 785 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 786 rem = nfsm_rndup(siz)-siz; 787 while (siz > 0) { 788 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 789 return (EFBIG); 790 left = uiop->uio_iov->iov_len; 791 uiocp = uiop->uio_iov->iov_base; 792 if (left > siz) 793 left = siz; 794 uiosiz = left; 795 while (left > 0) { 796 while (len == 0) { 797 mp = mp->m_next; 798 if (mp == NULL) 799 return (EBADRPC); 800 mbufcp = mtod(mp, caddr_t); 801 len = mp->m_len; 802 } 803 xfer = (left > len) ? len : left; 804 #ifdef notdef 805 /* Not Yet.. */ 806 if (uiop->uio_iov->iov_op != NULL) 807 (*(uiop->uio_iov->iov_op)) 808 (mbufcp, uiocp, xfer); 809 else 810 #endif 811 if (uiop->uio_segflg == UIO_SYSSPACE) 812 memcpy(uiocp, mbufcp, xfer); 813 else 814 copyout(mbufcp, uiocp, xfer); 815 left -= xfer; 816 len -= xfer; 817 mbufcp += xfer; 818 uiocp += xfer; 819 uiop->uio_offset += xfer; 820 uiop->uio_resid -= xfer; 821 } 822 if (uiop->uio_iov->iov_len <= siz) { 823 uiop->uio_iovcnt--; 824 uiop->uio_iov++; 825 } else { 826 (caddr_t)uiop->uio_iov->iov_base += uiosiz; 827 uiop->uio_iov->iov_len -= uiosiz; 828 } 829 siz -= uiosiz; 830 } 831 *dpos = mbufcp; 832 *mrep = mp; 833 if (rem > 0) { 834 if (len < rem) 835 error = nfs_adv(mrep, dpos, rem, len); 836 else 837 *dpos += rem; 838 } 839 return (error); 840 } 841 842 /* 843 * copies a uio scatter/gather list to an mbuf chain. 844 * NOTE: can ony handle iovcnt == 1 845 */ 846 int 847 nfsm_uiotombuf(uiop, mq, siz, bpos) 848 register struct uio *uiop; 849 struct mbuf **mq; 850 int siz; 851 caddr_t *bpos; 852 { 853 register char *uiocp; 854 register struct mbuf *mp, *mp2; 855 register int xfer, left, mlen; 856 int uiosiz, clflg, rem; 857 char *cp; 858 859 #ifdef DIAGNOSTIC 860 if (uiop->uio_iovcnt != 1) 861 panic("nfsm_uiotombuf: iovcnt != 1"); 862 #endif 863 864 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 865 clflg = 1; 866 else 867 clflg = 0; 868 rem = nfsm_rndup(siz)-siz; 869 mp = mp2 = *mq; 870 while (siz > 0) { 871 left = uiop->uio_iov->iov_len; 872 uiocp = uiop->uio_iov->iov_base; 873 if (left > siz) 874 left = siz; 875 uiosiz = left; 876 while (left > 0) { 877 mlen = M_TRAILINGSPACE(mp); 878 if (mlen == 0) { 879 MGET(mp, M_WAIT, MT_DATA); 880 if (clflg) 881 MCLGET(mp, M_WAIT); 882 mp->m_len = 0; 883 mp2->m_next = mp; 884 mp2 = mp; 885 mlen = M_TRAILINGSPACE(mp); 886 } 887 xfer = (left > mlen) ? mlen : left; 888 #ifdef notdef 889 /* Not Yet.. */ 890 if (uiop->uio_iov->iov_op != NULL) 891 (*(uiop->uio_iov->iov_op)) 892 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 893 else 894 #endif 895 if (uiop->uio_segflg == UIO_SYSSPACE) 896 memcpy(mtod(mp, caddr_t)+mp->m_len, uiocp, xfer); 897 else 898 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 899 mp->m_len += xfer; 900 left -= xfer; 901 uiocp += xfer; 902 uiop->uio_offset += xfer; 903 uiop->uio_resid -= xfer; 904 } 905 (caddr_t)uiop->uio_iov->iov_base += uiosiz; 906 uiop->uio_iov->iov_len -= uiosiz; 907 siz -= uiosiz; 908 } 909 if (rem > 0) { 910 if (rem > M_TRAILINGSPACE(mp)) { 911 MGET(mp, M_WAIT, MT_DATA); 912 mp->m_len = 0; 913 mp2->m_next = mp; 914 } 915 cp = mtod(mp, caddr_t)+mp->m_len; 916 for (left = 0; left < rem; left++) 917 *cp++ = '\0'; 918 mp->m_len += rem; 919 *bpos = cp; 920 } else 921 *bpos = mtod(mp, caddr_t)+mp->m_len; 922 *mq = mp; 923 return (0); 924 } 925 926 /* 927 * Get at least "siz" bytes of correctly aligned data. 928 * When called the mbuf pointers are not necessarily correct, 929 * dsosp points to what ought to be in m_data and left contains 930 * what ought to be in m_len. 931 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 932 * cases. (The macros use the vars. dpos and dpos2) 933 */ 934 int 935 nfsm_disct(mdp, dposp, siz, left, cp2) 936 struct mbuf **mdp; 937 caddr_t *dposp; 938 int siz; 939 int left; 940 caddr_t *cp2; 941 { 942 register struct mbuf *m1, *m2; 943 struct mbuf *havebuf = NULL; 944 caddr_t src = *dposp; 945 caddr_t dst; 946 int len; 947 948 #ifdef DEBUG 949 if (left < 0) 950 panic("nfsm_disct: left < 0"); 951 #endif 952 m1 = *mdp; 953 /* 954 * Skip through the mbuf chain looking for an mbuf with 955 * some data. If the first mbuf found has enough data 956 * and it is correctly aligned return it. 957 */ 958 while (left == 0) { 959 havebuf = m1; 960 *mdp = m1 = m1->m_next; 961 if (m1 == NULL) 962 return (EBADRPC); 963 src = mtod(m1, caddr_t); 964 left = m1->m_len; 965 /* 966 * If we start a new mbuf and it is big enough 967 * and correctly aligned just return it, don't 968 * do any pull up. 969 */ 970 if (left >= siz && nfsm_aligned(src)) { 971 *cp2 = src; 972 *dposp = src + siz; 973 return (0); 974 } 975 } 976 if (m1->m_flags & M_EXT) { 977 if (havebuf) { 978 /* If the first mbuf with data has external data 979 * and there is a previous empty mbuf use it 980 * to move the data into. 981 */ 982 m2 = m1; 983 *mdp = m1 = havebuf; 984 if (m1->m_flags & M_EXT) { 985 MEXTREMOVE(m1); 986 } 987 } else { 988 /* 989 * If the first mbuf has a external data 990 * and there is no previous empty mbuf 991 * allocate a new mbuf and move the external 992 * data to the new mbuf. Also make the first 993 * mbuf look empty. 994 */ 995 m2 = m_get(M_WAIT, MT_DATA); 996 m2->m_ext = m1->m_ext; 997 m2->m_data = src; 998 m2->m_len = left; 999 MCLADDREFERENCE(m1, m2); 1000 MEXTREMOVE(m1); 1001 m2->m_next = m1->m_next; 1002 m1->m_next = m2; 1003 } 1004 m1->m_len = 0; 1005 dst = m1->m_dat; 1006 } else { 1007 /* 1008 * If the first mbuf has no external data 1009 * move the data to the front of the mbuf. 1010 */ 1011 if ((dst = m1->m_dat) != src) 1012 memmove(dst, src, left); 1013 dst += left; 1014 m1->m_len = left; 1015 m2 = m1->m_next; 1016 } 1017 m1->m_flags &= ~M_PKTHDR; 1018 *cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */ 1019 *dposp = mtod(m1, caddr_t) + siz; 1020 /* 1021 * Loop through mbufs pulling data up into first mbuf until 1022 * the first mbuf is full or there is no more data to 1023 * pullup. 1024 */ 1025 while ((len = (MLEN - m1->m_len)) != 0 && m2) { 1026 if ((len = min(len, m2->m_len)) != 0) 1027 memcpy(dst, m2->m_data, len); 1028 m1->m_len += len; 1029 dst += len; 1030 m2->m_data += len; 1031 m2->m_len -= len; 1032 m2 = m2->m_next; 1033 } 1034 if (m1->m_len < siz) 1035 return (EBADRPC); 1036 return (0); 1037 } 1038 1039 /* 1040 * Advance the position in the mbuf chain. 1041 */ 1042 int 1043 nfs_adv(mdp, dposp, offs, left) 1044 struct mbuf **mdp; 1045 caddr_t *dposp; 1046 int offs; 1047 int left; 1048 { 1049 register struct mbuf *m; 1050 register int s; 1051 1052 m = *mdp; 1053 s = left; 1054 while (s < offs) { 1055 offs -= s; 1056 m = m->m_next; 1057 if (m == NULL) 1058 return (EBADRPC); 1059 s = m->m_len; 1060 } 1061 *mdp = m; 1062 *dposp = mtod(m, caddr_t)+offs; 1063 return (0); 1064 } 1065 1066 /* 1067 * Copy a string into mbufs for the hard cases... 1068 */ 1069 int 1070 nfsm_strtmbuf(mb, bpos, cp, siz) 1071 struct mbuf **mb; 1072 char **bpos; 1073 const char *cp; 1074 long siz; 1075 { 1076 register struct mbuf *m1 = NULL, *m2; 1077 long left, xfer, len, tlen; 1078 u_int32_t *tl; 1079 int putsize; 1080 1081 putsize = 1; 1082 m2 = *mb; 1083 left = M_TRAILINGSPACE(m2); 1084 if (left > 0) { 1085 tl = ((u_int32_t *)(*bpos)); 1086 *tl++ = txdr_unsigned(siz); 1087 putsize = 0; 1088 left -= NFSX_UNSIGNED; 1089 m2->m_len += NFSX_UNSIGNED; 1090 if (left > 0) { 1091 memcpy((caddr_t) tl, cp, left); 1092 siz -= left; 1093 cp += left; 1094 m2->m_len += left; 1095 left = 0; 1096 } 1097 } 1098 /* Loop around adding mbufs */ 1099 while (siz > 0) { 1100 MGET(m1, M_WAIT, MT_DATA); 1101 if (siz > MLEN) 1102 MCLGET(m1, M_WAIT); 1103 m1->m_len = NFSMSIZ(m1); 1104 m2->m_next = m1; 1105 m2 = m1; 1106 tl = mtod(m1, u_int32_t *); 1107 tlen = 0; 1108 if (putsize) { 1109 *tl++ = txdr_unsigned(siz); 1110 m1->m_len -= NFSX_UNSIGNED; 1111 tlen = NFSX_UNSIGNED; 1112 putsize = 0; 1113 } 1114 if (siz < m1->m_len) { 1115 len = nfsm_rndup(siz); 1116 xfer = siz; 1117 if (xfer < len) 1118 *(tl+(xfer>>2)) = 0; 1119 } else { 1120 xfer = len = m1->m_len; 1121 } 1122 memcpy((caddr_t) tl, cp, xfer); 1123 m1->m_len = len+tlen; 1124 siz -= xfer; 1125 cp += xfer; 1126 } 1127 *mb = m1; 1128 *bpos = mtod(m1, caddr_t)+m1->m_len; 1129 return (0); 1130 } 1131 1132 /* 1133 * Directory caching routines. They work as follows: 1134 * - a cache is maintained per VDIR nfsnode. 1135 * - for each offset cookie that is exported to userspace, and can 1136 * thus be thrown back at us as an offset to VOP_READDIR, store 1137 * information in the cache. 1138 * - cached are: 1139 * - cookie itself 1140 * - blocknumber (essentially just a search key in the buffer cache) 1141 * - entry number in block. 1142 * - offset cookie of block in which this entry is stored 1143 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1144 * - entries are looked up in a hash table 1145 * - also maintained is an LRU list of entries, used to determine 1146 * which ones to delete if the cache grows too large. 1147 * - if 32 <-> 64 translation mode is requested for a filesystem, 1148 * the cache also functions as a translation table 1149 * - in the translation case, invalidating the cache does not mean 1150 * flushing it, but just marking entries as invalid, except for 1151 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1152 * still be able to use the cache as a translation table. 1153 * - 32 bit cookies are uniquely created by combining the hash table 1154 * entry value, and one generation count per hash table entry, 1155 * incremented each time an entry is appended to the chain. 1156 * - the cache is invalidated each time a direcory is modified 1157 * - sanity checks are also done; if an entry in a block turns 1158 * out not to have a matching cookie, the cache is invalidated 1159 * and a new block starting from the wanted offset is fetched from 1160 * the server. 1161 * - directory entries as read from the server are extended to contain 1162 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1163 * the cache and exporting them to userspace through the cookie 1164 * argument to VOP_READDIR. 1165 */ 1166 1167 u_long 1168 nfs_dirhash(off) 1169 off_t off; 1170 { 1171 int i; 1172 char *cp = (char *)&off; 1173 u_long sum = 0L; 1174 1175 for (i = 0 ; i < sizeof (off); i++) 1176 sum += *cp++; 1177 1178 return sum; 1179 } 1180 1181 void 1182 nfs_initdircache(vp) 1183 struct vnode *vp; 1184 { 1185 struct nfsnode *np = VTONFS(vp); 1186 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1187 1188 np->n_dircachesize = 0; 1189 np->n_dblkno = 1; 1190 np->n_dircache = 1191 hashinit(NFS_DIRHASHSIZ, M_NFSDIROFF, M_WAITOK, &nfsdirhashmask); 1192 TAILQ_INIT(&np->n_dirchain); 1193 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1194 MALLOC(np->n_dirgens, unsigned *, 1195 NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1196 M_WAITOK); 1197 memset((caddr_t)np->n_dirgens, 0, 1198 NFS_DIRHASHSIZ * sizeof (unsigned)); 1199 } 1200 } 1201 1202 static struct nfsdircache dzero = {0, 0, {0, 0}, {0, 0}, 0, 0, 0}; 1203 1204 struct nfsdircache * 1205 nfs_searchdircache(vp, off, do32, hashent) 1206 struct vnode *vp; 1207 off_t off; 1208 int do32; 1209 int *hashent; 1210 { 1211 struct nfsdirhashhead *ndhp; 1212 struct nfsdircache *ndp = NULL; 1213 struct nfsnode *np = VTONFS(vp); 1214 unsigned ent; 1215 1216 /* 1217 * Zero is always a valid cookie. 1218 */ 1219 if (off == 0) 1220 return &dzero; 1221 1222 /* 1223 * We use a 32bit cookie as search key, directly reconstruct 1224 * the hashentry. Else use the hashfunction. 1225 */ 1226 if (do32) { 1227 ent = (u_int32_t)off >> 24; 1228 if (ent >= NFS_DIRHASHSIZ) 1229 return NULL; 1230 ndhp = &np->n_dircache[ent]; 1231 } else { 1232 ndhp = NFSDIRHASH(np, off); 1233 } 1234 1235 if (hashent) 1236 *hashent = (int)(ndhp - np->n_dircache); 1237 if (do32) { 1238 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) { 1239 if (ndp->dc_cookie32 == (u_int32_t)off) { 1240 /* 1241 * An invalidated entry will become the 1242 * start of a new block fetched from 1243 * the server. 1244 */ 1245 if (ndp->dc_blkno == -1) { 1246 ndp->dc_blkcookie = ndp->dc_cookie; 1247 ndp->dc_blkno = np->n_dblkno++; 1248 ndp->dc_entry = 0; 1249 } 1250 break; 1251 } 1252 } 1253 } else { 1254 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) 1255 if (ndp->dc_cookie == off) 1256 break; 1257 } 1258 return ndp; 1259 } 1260 1261 1262 struct nfsdircache * 1263 nfs_enterdircache(vp, off, blkoff, en, blkno) 1264 struct vnode *vp; 1265 off_t off, blkoff; 1266 daddr_t blkno; 1267 int en; 1268 { 1269 struct nfsnode *np = VTONFS(vp); 1270 struct nfsdirhashhead *ndhp; 1271 struct nfsdircache *ndp = NULL, *first; 1272 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1273 int hashent, gen, overwrite; 1274 1275 if (!np->n_dircache) 1276 /* 1277 * XXX would like to do this in nfs_nget but vtype 1278 * isn't known at that time. 1279 */ 1280 nfs_initdircache(vp); 1281 1282 /* 1283 * XXX refuse entries for offset 0. amd(8) erroneously sets 1284 * cookie 0 for the '.' entry, making this necessary. This 1285 * isn't so bad, as 0 is a special case anyway. 1286 */ 1287 if (off == 0) 1288 return &dzero; 1289 1290 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1291 1292 if (ndp && ndp->dc_blkno != -1) { 1293 /* 1294 * Overwriting an old entry. Check if it's the same. 1295 * If so, just return. If not, remove the old entry. 1296 */ 1297 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1298 return ndp; 1299 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1300 LIST_REMOVE(ndp, dc_hash); 1301 FREE(ndp, M_NFSDIROFF); 1302 ndp = 0; 1303 } 1304 1305 ndhp = &np->n_dircache[hashent]; 1306 1307 if (!ndp) { 1308 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, 1309 M_WAITOK); 1310 overwrite = 0; 1311 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1312 /* 1313 * We're allocating a new entry, so bump the 1314 * generation number. 1315 */ 1316 gen = ++np->n_dirgens[hashent]; 1317 if (gen == 0) { 1318 np->n_dirgens[hashent]++; 1319 gen++; 1320 } 1321 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1322 } 1323 } else 1324 overwrite = 1; 1325 1326 /* 1327 * If the entry number is 0, we are at the start of a new block, so 1328 * allocate a new blocknumber. 1329 */ 1330 if (en == 0) 1331 ndp->dc_blkno = np->n_dblkno++; 1332 else 1333 ndp->dc_blkno = blkno; 1334 1335 ndp->dc_cookie = off; 1336 ndp->dc_blkcookie = blkoff; 1337 ndp->dc_entry = en; 1338 1339 if (overwrite) 1340 return ndp; 1341 1342 /* 1343 * If the maximum directory cookie cache size has been reached 1344 * for this node, take one off the front. The idea is that 1345 * directories are typically read front-to-back once, so that 1346 * the oldest entries can be thrown away without much performance 1347 * loss. 1348 */ 1349 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1350 first = np->n_dirchain.tqh_first; 1351 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1352 LIST_REMOVE(first, dc_hash); 1353 FREE(first, M_NFSDIROFF); 1354 } else 1355 np->n_dircachesize++; 1356 1357 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1358 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1359 return ndp; 1360 } 1361 1362 void 1363 nfs_invaldircache(vp, forcefree) 1364 struct vnode *vp; 1365 int forcefree; 1366 { 1367 struct nfsnode *np = VTONFS(vp); 1368 struct nfsdircache *ndp = NULL; 1369 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1370 1371 #ifdef DIAGNOSTIC 1372 if (vp->v_type != VDIR) 1373 panic("nfs: invaldircache: not dir"); 1374 #endif 1375 1376 if (!np->n_dircache) 1377 return; 1378 1379 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1380 while ((ndp = np->n_dirchain.tqh_first)) { 1381 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1382 LIST_REMOVE(ndp, dc_hash); 1383 FREE(ndp, M_NFSDIROFF); 1384 } 1385 np->n_dircachesize = 0; 1386 if (forcefree && np->n_dirgens) { 1387 FREE(np->n_dirgens, M_NFSDIROFF); 1388 } 1389 } else { 1390 for (ndp = np->n_dirchain.tqh_first; ndp; 1391 ndp = ndp->dc_chain.tqe_next) 1392 ndp->dc_blkno = -1; 1393 } 1394 1395 np->n_dblkno = 1; 1396 } 1397 1398 /* 1399 * Called once before VFS init to initialize shared and 1400 * server-specific data structures. 1401 */ 1402 void 1403 nfs_init() 1404 { 1405 1406 #if !defined(alpha) && defined(DIAGNOSTIC) 1407 /* 1408 * Check to see if major data structures haven't bloated. 1409 */ 1410 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1411 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1412 printf("Try reducing NFS_SMALLFH\n"); 1413 } 1414 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1415 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1416 printf("Try reducing NFS_UIDHASHSIZ\n"); 1417 } 1418 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1419 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1420 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1421 } 1422 #endif 1423 1424 nfsrtt.pos = 0; 1425 rpc_vers = txdr_unsigned(RPC_VER2); 1426 rpc_call = txdr_unsigned(RPC_CALL); 1427 rpc_reply = txdr_unsigned(RPC_REPLY); 1428 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1429 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1430 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1431 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1432 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1433 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1434 nfs_prog = txdr_unsigned(NFS_PROG); 1435 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1436 nfs_true = txdr_unsigned(TRUE); 1437 nfs_false = txdr_unsigned(FALSE); 1438 nfs_xdrneg1 = txdr_unsigned(-1); 1439 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1440 if (nfs_ticks < 1) 1441 nfs_ticks = 1; 1442 #ifdef NFSSERVER 1443 nfsrv_init(0); /* Init server data structures */ 1444 nfsrv_initcache(); /* Init the server request cache */ 1445 #endif /* NFSSERVER */ 1446 1447 /* 1448 * Initialize the nqnfs data structures. 1449 */ 1450 if (nqnfsstarttime == 0) { 1451 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1452 + nqsrv_clockskew + nqsrv_writeslack; 1453 NQLOADNOVRAM(nqnfsstarttime); 1454 CIRCLEQ_INIT(&nqtimerhead); 1455 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, M_WAITOK, &nqfhhash); 1456 } 1457 1458 /* 1459 * Initialize reply list and start timer 1460 */ 1461 TAILQ_INIT(&nfs_reqq); 1462 nfs_timer(NULL); 1463 } 1464 1465 #ifdef NFS 1466 /* 1467 * Called once at VFS init to initialize client-specific data structures. 1468 */ 1469 void 1470 nfs_vfs_init() 1471 { 1472 register int i; 1473 1474 /* Ensure async daemons disabled */ 1475 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1476 nfs_iodwant[i] = (struct proc *)0; 1477 nfs_iodmount[i] = (struct nfsmount *)0; 1478 } 1479 nfs_nhinit(); /* Init the nfsnode table */ 1480 } 1481 1482 /* 1483 * Attribute cache routines. 1484 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1485 * that are on the mbuf list 1486 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1487 * error otherwise 1488 */ 1489 1490 /* 1491 * Load the attribute cache (that lives in the nfsnode entry) with 1492 * the values on the mbuf list and 1493 * Iff vap not NULL 1494 * copy the attributes to *vaper 1495 */ 1496 int 1497 nfsm_loadattrcache(vpp, mdp, dposp, vaper) 1498 struct vnode **vpp; 1499 struct mbuf **mdp; 1500 caddr_t *dposp; 1501 struct vattr *vaper; 1502 { 1503 register int32_t t1; 1504 caddr_t cp2; 1505 int error = 0; 1506 struct mbuf *md; 1507 int v3 = NFS_ISV3(*vpp); 1508 1509 md = *mdp; 1510 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1511 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1512 if (error) 1513 return (error); 1514 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper); 1515 } 1516 1517 int 1518 nfs_loadattrcache(vpp, fp, vaper) 1519 struct vnode **vpp; 1520 struct nfs_fattr *fp; 1521 struct vattr *vaper; 1522 { 1523 register struct vnode *vp = *vpp; 1524 register struct vattr *vap; 1525 int v3 = NFS_ISV3(vp); 1526 enum vtype vtyp; 1527 u_short vmode; 1528 struct timespec mtime; 1529 struct vnode *nvp; 1530 int32_t rdev; 1531 register struct nfsnode *np; 1532 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1533 1534 if (v3) { 1535 vtyp = nfsv3tov_type(fp->fa_type); 1536 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1537 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1538 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1539 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1540 } else { 1541 vtyp = nfsv2tov_type(fp->fa_type); 1542 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1543 if (vtyp == VNON || vtyp == VREG) 1544 vtyp = IFTOVT(vmode); 1545 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1546 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1547 1548 /* 1549 * Really ugly NFSv2 kludge. 1550 */ 1551 if (vtyp == VCHR && rdev == 0xffffffff) 1552 vtyp = VFIFO; 1553 } 1554 1555 /* 1556 * If v_type == VNON it is a new node, so fill in the v_type, 1557 * n_mtime fields. Check to see if it represents a special 1558 * device, and if so, check for a possible alias. Once the 1559 * correct vnode has been obtained, fill in the rest of the 1560 * information. 1561 */ 1562 np = VTONFS(vp); 1563 if (vp->v_type != vtyp) { 1564 vp->v_type = vtyp; 1565 if (vp->v_type == VFIFO) { 1566 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1567 vp->v_op = fifo_nfsv2nodeop_p; 1568 } 1569 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1570 vp->v_op = spec_nfsv2nodeop_p; 1571 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1572 if (nvp) { 1573 /* 1574 * Discard unneeded vnode, but save its nfsnode. 1575 * Since the nfsnode does not have a lock, its 1576 * vnode lock has to be carried over. 1577 */ 1578 nvp->v_vnlock = vp->v_vnlock; 1579 vp->v_vnlock = NULL; 1580 nvp->v_data = vp->v_data; 1581 vp->v_data = NULL; 1582 vp->v_op = spec_vnodeop_p; 1583 vrele(vp); 1584 vgone(vp); 1585 /* 1586 * Reinitialize aliased node. 1587 */ 1588 np->n_vnode = nvp; 1589 *vpp = vp = nvp; 1590 } 1591 } 1592 np->n_mtime = mtime.tv_sec; 1593 } 1594 vap = np->n_vattr; 1595 vap->va_type = vtyp; 1596 vap->va_mode = vmode & ALLPERMS; 1597 vap->va_rdev = (dev_t)rdev; 1598 vap->va_mtime = mtime; 1599 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1600 if (v3) { 1601 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1602 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1603 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1604 vap->va_size = fxdr_hyper(&fp->fa3_size); 1605 if (vtyp == VDIR) 1606 vap->va_blocksize = NFS_DIRFRAGSIZ; 1607 else 1608 vap->va_blocksize = NFS_FABLKSIZE; 1609 vap->va_bytes = fxdr_hyper(&fp->fa3_used); 1610 vap->va_fileid = fxdr_unsigned(int32_t, 1611 fp->fa3_fileid.nfsuquad[1]); 1612 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1613 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1614 vap->va_flags = 0; 1615 vap->va_filerev = 0; 1616 } else { 1617 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1618 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1619 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1620 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1621 if (vtyp == VDIR) 1622 vap->va_blocksize = NFS_DIRFRAGSIZ; 1623 else 1624 vap->va_blocksize = 1625 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1626 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1627 * NFS_FABLKSIZE; 1628 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1629 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1630 vap->va_flags = 0; 1631 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1632 fp->fa2_ctime.nfsv2_sec); 1633 vap->va_ctime.tv_nsec = 0; 1634 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1635 vap->va_filerev = 0; 1636 } 1637 if (vap->va_size != np->n_size) { 1638 if (vap->va_type == VREG) { 1639 if (np->n_flag & NMODIFIED) { 1640 if (vap->va_size < np->n_size) 1641 vap->va_size = np->n_size; 1642 else 1643 np->n_size = vap->va_size; 1644 } else 1645 np->n_size = vap->va_size; 1646 #if defined(UVM) 1647 uvm_vnp_setsize(vp, np->n_size); 1648 #else 1649 vnode_pager_setsize(vp, np->n_size); 1650 #endif 1651 } else 1652 np->n_size = vap->va_size; 1653 } 1654 np->n_attrstamp = time.tv_sec; 1655 if (vaper != NULL) { 1656 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(*vap)); 1657 if (np->n_flag & NCHG) { 1658 if (np->n_flag & NACC) 1659 vaper->va_atime = np->n_atim; 1660 if (np->n_flag & NUPD) 1661 vaper->va_mtime = np->n_mtim; 1662 } 1663 } 1664 return (0); 1665 } 1666 1667 /* 1668 * Check the time stamp 1669 * If the cache is valid, copy contents to *vap and return 0 1670 * otherwise return an error 1671 */ 1672 int 1673 nfs_getattrcache(vp, vaper) 1674 register struct vnode *vp; 1675 struct vattr *vaper; 1676 { 1677 register struct nfsnode *np = VTONFS(vp); 1678 register struct vattr *vap; 1679 1680 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1681 nfsstats.attrcache_misses++; 1682 return (ENOENT); 1683 } 1684 nfsstats.attrcache_hits++; 1685 vap = np->n_vattr; 1686 if (vap->va_size != np->n_size) { 1687 if (vap->va_type == VREG) { 1688 if (np->n_flag & NMODIFIED) { 1689 if (vap->va_size < np->n_size) 1690 vap->va_size = np->n_size; 1691 else 1692 np->n_size = vap->va_size; 1693 } else 1694 np->n_size = vap->va_size; 1695 #if defined(UVM) 1696 uvm_vnp_setsize(vp, np->n_size); 1697 #else 1698 vnode_pager_setsize(vp, np->n_size); 1699 #endif 1700 } else 1701 np->n_size = vap->va_size; 1702 } 1703 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(struct vattr)); 1704 if (np->n_flag & NCHG) { 1705 if (np->n_flag & NACC) 1706 vaper->va_atime = np->n_atim; 1707 if (np->n_flag & NUPD) 1708 vaper->va_mtime = np->n_mtim; 1709 } 1710 return (0); 1711 } 1712 1713 /* 1714 * Heuristic to see if the server XDR encodes directory cookies or not. 1715 * it is not supposed to, but a lot of servers may do this. Also, since 1716 * most/all servers will implement V2 as well, it is expected that they 1717 * may return just 32 bits worth of cookie information, so we need to 1718 * find out in which 32 bits this information is available. We do this 1719 * to avoid trouble with emulated binaries that can't handle 64 bit 1720 * directory offsets. 1721 */ 1722 1723 void 1724 nfs_cookieheuristic(vp, flagp, p, cred) 1725 struct vnode *vp; 1726 int *flagp; 1727 struct proc *p; 1728 struct ucred *cred; 1729 { 1730 struct uio auio; 1731 struct iovec aiov; 1732 caddr_t buf, cp; 1733 struct dirent *dp; 1734 off_t *cookies = NULL, *cop; 1735 int error, eof, nc, len; 1736 1737 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1738 1739 aiov.iov_base = buf; 1740 aiov.iov_len = NFS_DIRFRAGSIZ; 1741 auio.uio_iov = &aiov; 1742 auio.uio_iovcnt = 1; 1743 auio.uio_rw = UIO_READ; 1744 auio.uio_segflg = UIO_SYSSPACE; 1745 auio.uio_procp = p; 1746 auio.uio_resid = NFS_DIRFRAGSIZ; 1747 auio.uio_offset = 0; 1748 1749 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1750 1751 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1752 if (error || len == 0) { 1753 FREE(buf, M_TEMP); 1754 if (cookies) 1755 FREE(cookies, M_TEMP); 1756 return; 1757 } 1758 1759 /* 1760 * Find the first valid entry and look at its offset cookie. 1761 */ 1762 1763 cp = buf; 1764 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1765 dp = (struct dirent *)cp; 1766 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1767 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1768 *flagp |= NFSMNT_SWAPCOOKIE; 1769 nfs_invaldircache(vp, 0); 1770 nfs_vinvalbuf(vp, 0, cred, p, 1); 1771 } 1772 break; 1773 } 1774 cop++; 1775 cp += dp->d_reclen; 1776 } 1777 1778 FREE(buf, M_TEMP); 1779 FREE(cookies, M_TEMP); 1780 } 1781 #endif /* NFS */ 1782 1783 /* 1784 * Set up nameidata for a lookup() call and do it. 1785 * 1786 * If pubflag is set, this call is done for a lookup operation on the 1787 * public filehandle. In that case we allow crossing mountpoints and 1788 * absolute pathnames. However, the caller is expected to check that 1789 * the lookup result is within the public fs, and deny access if 1790 * it is not. 1791 */ 1792 int 1793 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1794 register struct nameidata *ndp; 1795 fhandle_t *fhp; 1796 int len; 1797 struct nfssvc_sock *slp; 1798 struct mbuf *nam; 1799 struct mbuf **mdp; 1800 caddr_t *dposp; 1801 struct vnode **retdirp; 1802 struct proc *p; 1803 int kerbflag, pubflag; 1804 { 1805 register int i, rem; 1806 register struct mbuf *md; 1807 register char *fromcp, *tocp, *cp; 1808 struct iovec aiov; 1809 struct uio auio; 1810 struct vnode *dp; 1811 int error, rdonly, linklen; 1812 struct componentname *cnp = &ndp->ni_cnd; 1813 1814 *retdirp = (struct vnode *)0; 1815 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1816 /* 1817 * Copy the name from the mbuf list to ndp->ni_pnbuf 1818 * and set the various ndp fields appropriately. 1819 */ 1820 fromcp = *dposp; 1821 tocp = cnp->cn_pnbuf; 1822 md = *mdp; 1823 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1824 for (i = 0; i < len; i++) { 1825 while (rem == 0) { 1826 md = md->m_next; 1827 if (md == NULL) { 1828 error = EBADRPC; 1829 goto out; 1830 } 1831 fromcp = mtod(md, caddr_t); 1832 rem = md->m_len; 1833 } 1834 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1835 error = EACCES; 1836 goto out; 1837 } 1838 *tocp++ = *fromcp++; 1839 rem--; 1840 } 1841 *tocp = '\0'; 1842 *mdp = md; 1843 *dposp = fromcp; 1844 len = nfsm_rndup(len)-len; 1845 if (len > 0) { 1846 if (rem >= len) 1847 *dposp += len; 1848 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1849 goto out; 1850 } 1851 1852 /* 1853 * Extract and set starting directory. 1854 */ 1855 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1856 nam, &rdonly, kerbflag, pubflag); 1857 if (error) 1858 goto out; 1859 if (dp->v_type != VDIR) { 1860 vrele(dp); 1861 error = ENOTDIR; 1862 goto out; 1863 } 1864 1865 if (rdonly) 1866 cnp->cn_flags |= RDONLY; 1867 1868 *retdirp = dp; 1869 1870 if (pubflag) { 1871 /* 1872 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1873 * and the 'native path' indicator. 1874 */ 1875 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1876 fromcp = cnp->cn_pnbuf; 1877 tocp = cp; 1878 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1879 switch ((unsigned char)*fromcp) { 1880 case WEBNFS_NATIVE_CHAR: 1881 /* 1882 * 'Native' path for us is the same 1883 * as a path according to the NFS spec, 1884 * just skip the escape char. 1885 */ 1886 fromcp++; 1887 break; 1888 /* 1889 * More may be added in the future, range 0x80-0xff 1890 */ 1891 default: 1892 error = EIO; 1893 FREE(cp, M_NAMEI); 1894 goto out; 1895 } 1896 } 1897 /* 1898 * Translate the '%' escapes, URL-style. 1899 */ 1900 while (*fromcp != '\0') { 1901 if (*fromcp == WEBNFS_ESC_CHAR) { 1902 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1903 fromcp++; 1904 *tocp++ = HEXSTRTOI(fromcp); 1905 fromcp += 2; 1906 continue; 1907 } else { 1908 error = ENOENT; 1909 FREE(cp, M_NAMEI); 1910 goto out; 1911 } 1912 } else 1913 *tocp++ = *fromcp++; 1914 } 1915 *tocp = '\0'; 1916 FREE(cnp->cn_pnbuf, M_NAMEI); 1917 cnp->cn_pnbuf = cp; 1918 } 1919 1920 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1921 ndp->ni_segflg = UIO_SYSSPACE; 1922 1923 if (pubflag) { 1924 ndp->ni_rootdir = rootvnode; 1925 ndp->ni_loopcnt = 0; 1926 if (cnp->cn_pnbuf[0] == '/') 1927 dp = rootvnode; 1928 } else { 1929 cnp->cn_flags |= NOCROSSMOUNT; 1930 } 1931 1932 cnp->cn_proc = p; 1933 VREF(dp); 1934 1935 for (;;) { 1936 cnp->cn_nameptr = cnp->cn_pnbuf; 1937 ndp->ni_startdir = dp; 1938 /* 1939 * And call lookup() to do the real work 1940 */ 1941 error = lookup(ndp); 1942 if (error) 1943 break; 1944 /* 1945 * Check for encountering a symbolic link 1946 */ 1947 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1948 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1949 cnp->cn_flags |= HASBUF; 1950 return (0); 1951 } 1952 break; 1953 } else { 1954 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1955 VOP_UNLOCK(ndp->ni_dvp, 0); 1956 if (!pubflag) { 1957 vrele(ndp->ni_dvp); 1958 vput(ndp->ni_vp); 1959 ndp->ni_vp = NULL; 1960 error = EINVAL; 1961 break; 1962 } 1963 1964 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1965 error = ELOOP; 1966 break; 1967 } 1968 if (ndp->ni_pathlen > 1) 1969 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1970 else 1971 cp = cnp->cn_pnbuf; 1972 aiov.iov_base = cp; 1973 aiov.iov_len = MAXPATHLEN; 1974 auio.uio_iov = &aiov; 1975 auio.uio_iovcnt = 1; 1976 auio.uio_offset = 0; 1977 auio.uio_rw = UIO_READ; 1978 auio.uio_segflg = UIO_SYSSPACE; 1979 auio.uio_procp = (struct proc *)0; 1980 auio.uio_resid = MAXPATHLEN; 1981 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1982 if (error) { 1983 badlink: 1984 if (ndp->ni_pathlen > 1) 1985 FREE(cp, M_NAMEI); 1986 break; 1987 } 1988 linklen = MAXPATHLEN - auio.uio_resid; 1989 if (linklen == 0) { 1990 error = ENOENT; 1991 goto badlink; 1992 } 1993 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1994 error = ENAMETOOLONG; 1995 goto badlink; 1996 } 1997 if (ndp->ni_pathlen > 1) { 1998 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 1999 FREE(cnp->cn_pnbuf, M_NAMEI); 2000 cnp->cn_pnbuf = cp; 2001 } else 2002 cnp->cn_pnbuf[linklen] = '\0'; 2003 ndp->ni_pathlen += linklen; 2004 vput(ndp->ni_vp); 2005 dp = ndp->ni_dvp; 2006 /* 2007 * Check if root directory should replace current directory. 2008 */ 2009 if (cnp->cn_pnbuf[0] == '/') { 2010 vrele(dp); 2011 dp = ndp->ni_rootdir; 2012 VREF(dp); 2013 } 2014 } 2015 } 2016 out: 2017 FREE(cnp->cn_pnbuf, M_NAMEI); 2018 return (error); 2019 } 2020 2021 /* 2022 * A fiddled version of m_adj() that ensures null fill to a long 2023 * boundary and only trims off the back end 2024 */ 2025 void 2026 nfsm_adj(mp, len, nul) 2027 struct mbuf *mp; 2028 register int len; 2029 int nul; 2030 { 2031 register struct mbuf *m; 2032 register int count, i; 2033 register char *cp; 2034 2035 /* 2036 * Trim from tail. Scan the mbuf chain, 2037 * calculating its length and finding the last mbuf. 2038 * If the adjustment only affects this mbuf, then just 2039 * adjust and return. Otherwise, rescan and truncate 2040 * after the remaining size. 2041 */ 2042 count = 0; 2043 m = mp; 2044 for (;;) { 2045 count += m->m_len; 2046 if (m->m_next == (struct mbuf *)0) 2047 break; 2048 m = m->m_next; 2049 } 2050 if (m->m_len > len) { 2051 m->m_len -= len; 2052 if (nul > 0) { 2053 cp = mtod(m, caddr_t)+m->m_len-nul; 2054 for (i = 0; i < nul; i++) 2055 *cp++ = '\0'; 2056 } 2057 return; 2058 } 2059 count -= len; 2060 if (count < 0) 2061 count = 0; 2062 /* 2063 * Correct length for chain is "count". 2064 * Find the mbuf with last data, adjust its length, 2065 * and toss data from remaining mbufs on chain. 2066 */ 2067 for (m = mp; m; m = m->m_next) { 2068 if (m->m_len >= count) { 2069 m->m_len = count; 2070 if (nul > 0) { 2071 cp = mtod(m, caddr_t)+m->m_len-nul; 2072 for (i = 0; i < nul; i++) 2073 *cp++ = '\0'; 2074 } 2075 break; 2076 } 2077 count -= m->m_len; 2078 } 2079 for (m = m->m_next;m;m = m->m_next) 2080 m->m_len = 0; 2081 } 2082 2083 /* 2084 * Make these functions instead of macros, so that the kernel text size 2085 * doesn't get too big... 2086 */ 2087 void 2088 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2089 struct nfsrv_descript *nfsd; 2090 int before_ret; 2091 register struct vattr *before_vap; 2092 int after_ret; 2093 struct vattr *after_vap; 2094 struct mbuf **mbp; 2095 char **bposp; 2096 { 2097 register struct mbuf *mb = *mbp, *mb2; 2098 register char *bpos = *bposp; 2099 register u_int32_t *tl; 2100 2101 if (before_ret) { 2102 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2103 *tl = nfs_false; 2104 } else { 2105 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2106 *tl++ = nfs_true; 2107 txdr_hyper(before_vap->va_size, tl); 2108 tl += 2; 2109 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2110 tl += 2; 2111 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2112 } 2113 *bposp = bpos; 2114 *mbp = mb; 2115 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2116 } 2117 2118 void 2119 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2120 struct nfsrv_descript *nfsd; 2121 int after_ret; 2122 struct vattr *after_vap; 2123 struct mbuf **mbp; 2124 char **bposp; 2125 { 2126 register struct mbuf *mb = *mbp, *mb2; 2127 register char *bpos = *bposp; 2128 register u_int32_t *tl; 2129 register struct nfs_fattr *fp; 2130 2131 if (after_ret) { 2132 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2133 *tl = nfs_false; 2134 } else { 2135 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2136 *tl++ = nfs_true; 2137 fp = (struct nfs_fattr *)tl; 2138 nfsm_srvfattr(nfsd, after_vap, fp); 2139 } 2140 *mbp = mb; 2141 *bposp = bpos; 2142 } 2143 2144 void 2145 nfsm_srvfattr(nfsd, vap, fp) 2146 register struct nfsrv_descript *nfsd; 2147 register struct vattr *vap; 2148 register struct nfs_fattr *fp; 2149 { 2150 2151 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2152 fp->fa_uid = txdr_unsigned(vap->va_uid); 2153 fp->fa_gid = txdr_unsigned(vap->va_gid); 2154 if (nfsd->nd_flag & ND_NFSV3) { 2155 fp->fa_type = vtonfsv3_type(vap->va_type); 2156 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2157 txdr_hyper(vap->va_size, &fp->fa3_size); 2158 txdr_hyper(vap->va_bytes, &fp->fa3_used); 2159 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2160 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2161 fp->fa3_fsid.nfsuquad[0] = 0; 2162 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2163 fp->fa3_fileid.nfsuquad[0] = 0; 2164 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2165 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2166 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2167 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2168 } else { 2169 fp->fa_type = vtonfsv2_type(vap->va_type); 2170 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2171 fp->fa2_size = txdr_unsigned(vap->va_size); 2172 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2173 if (vap->va_type == VFIFO) 2174 fp->fa2_rdev = 0xffffffff; 2175 else 2176 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2177 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2178 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2179 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2180 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2181 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2182 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2183 } 2184 } 2185 2186 /* 2187 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2188 * - look up fsid in mount list (if not found ret error) 2189 * - get vp and export rights by calling VFS_FHTOVP() 2190 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2191 * - if not lockflag unlock it with VOP_UNLOCK() 2192 */ 2193 int 2194 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2195 fhandle_t *fhp; 2196 int lockflag; 2197 struct vnode **vpp; 2198 struct ucred *cred; 2199 struct nfssvc_sock *slp; 2200 struct mbuf *nam; 2201 int *rdonlyp; 2202 int kerbflag; 2203 { 2204 register struct mount *mp; 2205 register int i; 2206 struct ucred *credanon; 2207 int error, exflags; 2208 struct sockaddr_in *saddr; 2209 2210 *vpp = (struct vnode *)0; 2211 2212 if (nfs_ispublicfh(fhp)) { 2213 if (!pubflag || !nfs_pub.np_valid) 2214 return (ESTALE); 2215 fhp = &nfs_pub.np_handle; 2216 } 2217 2218 mp = vfs_getvfs(&fhp->fh_fsid); 2219 if (!mp) 2220 return (ESTALE); 2221 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 2222 if (error) 2223 return (error); 2224 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2225 if (error) 2226 return (error); 2227 2228 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2229 saddr = mtod(nam, struct sockaddr_in *); 2230 if (saddr->sin_family == AF_INET && 2231 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2232 vput(*vpp); 2233 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2234 } 2235 } 2236 /* 2237 * Check/setup credentials. 2238 */ 2239 if (exflags & MNT_EXKERB) { 2240 if (!kerbflag) { 2241 vput(*vpp); 2242 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2243 } 2244 } else if (kerbflag) { 2245 vput(*vpp); 2246 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2247 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2248 cred->cr_uid = credanon->cr_uid; 2249 cred->cr_gid = credanon->cr_gid; 2250 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2251 cred->cr_groups[i] = credanon->cr_groups[i]; 2252 cred->cr_ngroups = i; 2253 } 2254 if (exflags & MNT_EXRDONLY) 2255 *rdonlyp = 1; 2256 else 2257 *rdonlyp = 0; 2258 if (!lockflag) 2259 VOP_UNLOCK(*vpp, 0); 2260 return (0); 2261 } 2262 2263 /* 2264 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2265 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2266 * transformed this to all zeroes in both cases, so check for it. 2267 */ 2268 int 2269 nfs_ispublicfh(fhp) 2270 fhandle_t *fhp; 2271 { 2272 char *cp = (char *)fhp; 2273 int i; 2274 2275 for (i = 0; i < NFSX_V3FH; i++) 2276 if (*cp++ != 0) 2277 return (FALSE); 2278 return (TRUE); 2279 } 2280 2281 /* 2282 * This function compares two net addresses by family and returns TRUE 2283 * if they are the same host. 2284 * If there is any doubt, return FALSE. 2285 * The AF_INET family is handled as a special case so that address mbufs 2286 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2287 */ 2288 int 2289 netaddr_match(family, haddr, nam) 2290 int family; 2291 union nethostaddr *haddr; 2292 struct mbuf *nam; 2293 { 2294 register struct sockaddr_in *inetaddr; 2295 2296 switch (family) { 2297 case AF_INET: 2298 inetaddr = mtod(nam, struct sockaddr_in *); 2299 if (inetaddr->sin_family == AF_INET && 2300 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2301 return (1); 2302 break; 2303 #ifdef ISO 2304 case AF_ISO: 2305 { 2306 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2307 2308 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2309 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2310 if (isoaddr1->siso_family == AF_ISO && 2311 isoaddr1->siso_nlen > 0 && 2312 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2313 SAME_ISOADDR(isoaddr1, isoaddr2)) 2314 return (1); 2315 break; 2316 } 2317 #endif /* ISO */ 2318 default: 2319 break; 2320 }; 2321 return (0); 2322 } 2323 2324 2325 /* 2326 * The write verifier has changed (probably due to a server reboot), so all 2327 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2328 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2329 * flag. Once done the new write verifier can be set for the mount point. 2330 */ 2331 void 2332 nfs_clearcommit(mp) 2333 struct mount *mp; 2334 { 2335 register struct vnode *vp, *nvp; 2336 register struct buf *bp, *nbp; 2337 int s; 2338 2339 s = splbio(); 2340 loop: 2341 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2342 if (vp->v_mount != mp) /* Paranoia */ 2343 goto loop; 2344 nvp = vp->v_mntvnodes.le_next; 2345 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2346 nbp = bp->b_vnbufs.le_next; 2347 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2348 == (B_DELWRI | B_NEEDCOMMIT)) 2349 bp->b_flags &= ~B_NEEDCOMMIT; 2350 } 2351 } 2352 splx(s); 2353 } 2354 2355 /* 2356 * Map errnos to NFS error numbers. For Version 3 also filter out error 2357 * numbers not specified for the associated procedure. 2358 */ 2359 int 2360 nfsrv_errmap(nd, err) 2361 struct nfsrv_descript *nd; 2362 register int err; 2363 { 2364 register short *defaulterrp, *errp; 2365 2366 if (nd->nd_flag & ND_NFSV3) { 2367 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2368 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2369 while (*++errp) { 2370 if (*errp == err) 2371 return (err); 2372 else if (*errp > err) 2373 break; 2374 } 2375 return ((int)*defaulterrp); 2376 } else 2377 return (err & 0xffff); 2378 } 2379 if (err <= ELAST) 2380 return ((int)nfsrv_v2errmap[err - 1]); 2381 return (NFSERR_IO); 2382 } 2383 2384 /* 2385 * Sort the group list in increasing numerical order. 2386 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2387 * that used to be here.) 2388 */ 2389 void 2390 nfsrvw_sort(list, num) 2391 register gid_t *list; 2392 register int num; 2393 { 2394 register int i, j; 2395 gid_t v; 2396 2397 /* Insertion sort. */ 2398 for (i = 1; i < num; i++) { 2399 v = list[i]; 2400 /* find correct slot for value v, moving others up */ 2401 for (j = i; --j >= 0 && v < list[j];) 2402 list[j + 1] = list[j]; 2403 list[j + 1] = v; 2404 } 2405 } 2406 2407 /* 2408 * copy credentials making sure that the result can be compared with memcmp(). 2409 */ 2410 void 2411 nfsrv_setcred(incred, outcred) 2412 register struct ucred *incred, *outcred; 2413 { 2414 register int i; 2415 2416 memset((caddr_t)outcred, 0, sizeof (struct ucred)); 2417 outcred->cr_ref = 1; 2418 outcred->cr_uid = incred->cr_uid; 2419 outcred->cr_gid = incred->cr_gid; 2420 outcred->cr_ngroups = incred->cr_ngroups; 2421 for (i = 0; i < incred->cr_ngroups; i++) 2422 outcred->cr_groups[i] = incred->cr_groups[i]; 2423 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2424 } 2425
Indexes created Mon Sep 22 13:09:51 GMT 2025