nfs_subs.c revision 1.65
1 /* $NetBSD: nfs_subs.c,v 1.65 1999/02/27 00:47:34 wrstuden 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 0, 289 }; 290 291 static short nfsv3err_write[] = { 292 NFSERR_IO, 293 NFSERR_IO, 294 NFSERR_ACCES, 295 NFSERR_INVAL, 296 NFSERR_FBIG, 297 NFSERR_NOSPC, 298 NFSERR_ROFS, 299 NFSERR_DQUOT, 300 NFSERR_STALE, 301 NFSERR_BADHANDLE, 302 NFSERR_SERVERFAULT, 303 0, 304 }; 305 306 static short nfsv3err_create[] = { 307 NFSERR_IO, 308 NFSERR_IO, 309 NFSERR_ACCES, 310 NFSERR_EXIST, 311 NFSERR_NOTDIR, 312 NFSERR_NOSPC, 313 NFSERR_ROFS, 314 NFSERR_NAMETOL, 315 NFSERR_DQUOT, 316 NFSERR_STALE, 317 NFSERR_BADHANDLE, 318 NFSERR_NOTSUPP, 319 NFSERR_SERVERFAULT, 320 0, 321 }; 322 323 static short nfsv3err_mkdir[] = { 324 NFSERR_IO, 325 NFSERR_IO, 326 NFSERR_ACCES, 327 NFSERR_EXIST, 328 NFSERR_NOTDIR, 329 NFSERR_NOSPC, 330 NFSERR_ROFS, 331 NFSERR_NAMETOL, 332 NFSERR_DQUOT, 333 NFSERR_STALE, 334 NFSERR_BADHANDLE, 335 NFSERR_NOTSUPP, 336 NFSERR_SERVERFAULT, 337 0, 338 }; 339 340 static short nfsv3err_symlink[] = { 341 NFSERR_IO, 342 NFSERR_IO, 343 NFSERR_ACCES, 344 NFSERR_EXIST, 345 NFSERR_NOTDIR, 346 NFSERR_NOSPC, 347 NFSERR_ROFS, 348 NFSERR_NAMETOL, 349 NFSERR_DQUOT, 350 NFSERR_STALE, 351 NFSERR_BADHANDLE, 352 NFSERR_NOTSUPP, 353 NFSERR_SERVERFAULT, 354 0, 355 }; 356 357 static short nfsv3err_mknod[] = { 358 NFSERR_IO, 359 NFSERR_IO, 360 NFSERR_ACCES, 361 NFSERR_EXIST, 362 NFSERR_NOTDIR, 363 NFSERR_NOSPC, 364 NFSERR_ROFS, 365 NFSERR_NAMETOL, 366 NFSERR_DQUOT, 367 NFSERR_STALE, 368 NFSERR_BADHANDLE, 369 NFSERR_NOTSUPP, 370 NFSERR_SERVERFAULT, 371 NFSERR_BADTYPE, 372 0, 373 }; 374 375 static short nfsv3err_remove[] = { 376 NFSERR_IO, 377 NFSERR_NOENT, 378 NFSERR_IO, 379 NFSERR_ACCES, 380 NFSERR_NOTDIR, 381 NFSERR_ROFS, 382 NFSERR_NAMETOL, 383 NFSERR_STALE, 384 NFSERR_BADHANDLE, 385 NFSERR_SERVERFAULT, 386 0, 387 }; 388 389 static short nfsv3err_rmdir[] = { 390 NFSERR_IO, 391 NFSERR_NOENT, 392 NFSERR_IO, 393 NFSERR_ACCES, 394 NFSERR_EXIST, 395 NFSERR_NOTDIR, 396 NFSERR_INVAL, 397 NFSERR_ROFS, 398 NFSERR_NAMETOL, 399 NFSERR_NOTEMPTY, 400 NFSERR_STALE, 401 NFSERR_BADHANDLE, 402 NFSERR_NOTSUPP, 403 NFSERR_SERVERFAULT, 404 0, 405 }; 406 407 static short nfsv3err_rename[] = { 408 NFSERR_IO, 409 NFSERR_NOENT, 410 NFSERR_IO, 411 NFSERR_ACCES, 412 NFSERR_EXIST, 413 NFSERR_XDEV, 414 NFSERR_NOTDIR, 415 NFSERR_ISDIR, 416 NFSERR_INVAL, 417 NFSERR_NOSPC, 418 NFSERR_ROFS, 419 NFSERR_MLINK, 420 NFSERR_NAMETOL, 421 NFSERR_NOTEMPTY, 422 NFSERR_DQUOT, 423 NFSERR_STALE, 424 NFSERR_BADHANDLE, 425 NFSERR_NOTSUPP, 426 NFSERR_SERVERFAULT, 427 0, 428 }; 429 430 static short nfsv3err_link[] = { 431 NFSERR_IO, 432 NFSERR_IO, 433 NFSERR_ACCES, 434 NFSERR_EXIST, 435 NFSERR_XDEV, 436 NFSERR_NOTDIR, 437 NFSERR_INVAL, 438 NFSERR_NOSPC, 439 NFSERR_ROFS, 440 NFSERR_MLINK, 441 NFSERR_NAMETOL, 442 NFSERR_DQUOT, 443 NFSERR_STALE, 444 NFSERR_BADHANDLE, 445 NFSERR_NOTSUPP, 446 NFSERR_SERVERFAULT, 447 0, 448 }; 449 450 static short nfsv3err_readdir[] = { 451 NFSERR_IO, 452 NFSERR_IO, 453 NFSERR_ACCES, 454 NFSERR_NOTDIR, 455 NFSERR_STALE, 456 NFSERR_BADHANDLE, 457 NFSERR_BAD_COOKIE, 458 NFSERR_TOOSMALL, 459 NFSERR_SERVERFAULT, 460 0, 461 }; 462 463 static short nfsv3err_readdirplus[] = { 464 NFSERR_IO, 465 NFSERR_IO, 466 NFSERR_ACCES, 467 NFSERR_NOTDIR, 468 NFSERR_STALE, 469 NFSERR_BADHANDLE, 470 NFSERR_BAD_COOKIE, 471 NFSERR_NOTSUPP, 472 NFSERR_TOOSMALL, 473 NFSERR_SERVERFAULT, 474 0, 475 }; 476 477 static short nfsv3err_fsstat[] = { 478 NFSERR_IO, 479 NFSERR_IO, 480 NFSERR_STALE, 481 NFSERR_BADHANDLE, 482 NFSERR_SERVERFAULT, 483 0, 484 }; 485 486 static short nfsv3err_fsinfo[] = { 487 NFSERR_STALE, 488 NFSERR_STALE, 489 NFSERR_BADHANDLE, 490 NFSERR_SERVERFAULT, 491 0, 492 }; 493 494 static short nfsv3err_pathconf[] = { 495 NFSERR_STALE, 496 NFSERR_STALE, 497 NFSERR_BADHANDLE, 498 NFSERR_SERVERFAULT, 499 0, 500 }; 501 502 static short nfsv3err_commit[] = { 503 NFSERR_IO, 504 NFSERR_IO, 505 NFSERR_STALE, 506 NFSERR_BADHANDLE, 507 NFSERR_SERVERFAULT, 508 0, 509 }; 510 511 static short *nfsrv_v3errmap[] = { 512 nfsv3err_null, 513 nfsv3err_getattr, 514 nfsv3err_setattr, 515 nfsv3err_lookup, 516 nfsv3err_access, 517 nfsv3err_readlink, 518 nfsv3err_read, 519 nfsv3err_write, 520 nfsv3err_create, 521 nfsv3err_mkdir, 522 nfsv3err_symlink, 523 nfsv3err_mknod, 524 nfsv3err_remove, 525 nfsv3err_rmdir, 526 nfsv3err_rename, 527 nfsv3err_link, 528 nfsv3err_readdir, 529 nfsv3err_readdirplus, 530 nfsv3err_fsstat, 531 nfsv3err_fsinfo, 532 nfsv3err_pathconf, 533 nfsv3err_commit, 534 }; 535 536 extern struct nfsrtt nfsrtt; 537 extern time_t nqnfsstarttime; 538 extern int nqsrv_clockskew; 539 extern int nqsrv_writeslack; 540 extern int nqsrv_maxlease; 541 extern int nqnfs_piggy[NFS_NPROCS]; 542 extern nfstype nfsv2_type[9]; 543 extern nfstype nfsv3_type[9]; 544 extern struct nfsnodehashhead *nfsnodehashtbl; 545 extern u_long nfsnodehash; 546 547 LIST_HEAD(nfsnodehashhead, nfsnode); 548 u_long nfsdirhashmask; 549 550 int nfs_webnamei __P((struct nameidata *, struct vnode *, struct proc *)); 551 552 /* 553 * Create the header for an rpc request packet 554 * The hsiz is the size of the rest of the nfs request header. 555 * (just used to decide if a cluster is a good idea) 556 */ 557 struct mbuf * 558 nfsm_reqh(vp, procid, hsiz, bposp) 559 struct vnode *vp; 560 u_long procid; 561 int hsiz; 562 caddr_t *bposp; 563 { 564 register struct mbuf *mb; 565 register u_int32_t *tl; 566 register caddr_t bpos; 567 struct mbuf *mb2; 568 struct nfsmount *nmp; 569 int nqflag; 570 571 MGET(mb, M_WAIT, MT_DATA); 572 if (hsiz >= MINCLSIZE) 573 MCLGET(mb, M_WAIT); 574 mb->m_len = 0; 575 bpos = mtod(mb, caddr_t); 576 577 /* 578 * For NQNFS, add lease request. 579 */ 580 if (vp) { 581 nmp = VFSTONFS(vp->v_mount); 582 if (nmp->nm_flag & NFSMNT_NQNFS) { 583 nqflag = NQNFS_NEEDLEASE(vp, procid); 584 if (nqflag) { 585 nfsm_build(tl, u_int32_t *, 2*NFSX_UNSIGNED); 586 *tl++ = txdr_unsigned(nqflag); 587 *tl = txdr_unsigned(nmp->nm_leaseterm); 588 } else { 589 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 590 *tl = 0; 591 } 592 } 593 } 594 /* Finally, return values */ 595 *bposp = bpos; 596 return (mb); 597 } 598 599 /* 600 * Build the RPC header and fill in the authorization info. 601 * The authorization string argument is only used when the credentials 602 * come from outside of the kernel. 603 * Returns the head of the mbuf list. 604 */ 605 struct mbuf * 606 nfsm_rpchead(cr, nmflag, procid, auth_type, auth_len, auth_str, verf_len, 607 verf_str, mrest, mrest_len, mbp, xidp) 608 register struct ucred *cr; 609 int nmflag; 610 int procid; 611 int auth_type; 612 int auth_len; 613 char *auth_str; 614 int verf_len; 615 char *verf_str; 616 struct mbuf *mrest; 617 int mrest_len; 618 struct mbuf **mbp; 619 u_int32_t *xidp; 620 { 621 register struct mbuf *mb; 622 register u_int32_t *tl; 623 register caddr_t bpos; 624 register int i; 625 struct mbuf *mreq, *mb2; 626 int siz, grpsiz, authsiz; 627 struct timeval tv; 628 static u_int32_t base; 629 630 authsiz = nfsm_rndup(auth_len); 631 MGETHDR(mb, M_WAIT, MT_DATA); 632 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) { 633 MCLGET(mb, M_WAIT); 634 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) { 635 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED); 636 } else { 637 MH_ALIGN(mb, 8 * NFSX_UNSIGNED); 638 } 639 mb->m_len = 0; 640 mreq = mb; 641 bpos = mtod(mb, caddr_t); 642 643 /* 644 * First the RPC header. 645 */ 646 nfsm_build(tl, u_int32_t *, 8 * NFSX_UNSIGNED); 647 648 /* 649 * derive initial xid from system time 650 * XXX time is invalid if root not yet mounted 651 */ 652 if (!base && (rootvp)) { 653 microtime(&tv); 654 base = tv.tv_sec << 12; 655 nfs_xid = base; 656 } 657 /* 658 * Skip zero xid if it should ever happen. 659 */ 660 if (++nfs_xid == 0) 661 nfs_xid++; 662 663 *tl++ = *xidp = txdr_unsigned(nfs_xid); 664 *tl++ = rpc_call; 665 *tl++ = rpc_vers; 666 if (nmflag & NFSMNT_NQNFS) { 667 *tl++ = txdr_unsigned(NQNFS_PROG); 668 *tl++ = txdr_unsigned(NQNFS_VER3); 669 } else { 670 *tl++ = txdr_unsigned(NFS_PROG); 671 if (nmflag & NFSMNT_NFSV3) 672 *tl++ = txdr_unsigned(NFS_VER3); 673 else 674 *tl++ = txdr_unsigned(NFS_VER2); 675 } 676 if (nmflag & NFSMNT_NFSV3) 677 *tl++ = txdr_unsigned(procid); 678 else 679 *tl++ = txdr_unsigned(nfsv2_procid[procid]); 680 681 /* 682 * And then the authorization cred. 683 */ 684 *tl++ = txdr_unsigned(auth_type); 685 *tl = txdr_unsigned(authsiz); 686 switch (auth_type) { 687 case RPCAUTH_UNIX: 688 nfsm_build(tl, u_int32_t *, auth_len); 689 *tl++ = 0; /* stamp ?? */ 690 *tl++ = 0; /* NULL hostname */ 691 *tl++ = txdr_unsigned(cr->cr_uid); 692 *tl++ = txdr_unsigned(cr->cr_gid); 693 grpsiz = (auth_len >> 2) - 5; 694 *tl++ = txdr_unsigned(grpsiz); 695 for (i = 0; i < grpsiz; i++) 696 *tl++ = txdr_unsigned(cr->cr_groups[i]); 697 break; 698 case RPCAUTH_KERB4: 699 siz = auth_len; 700 while (siz > 0) { 701 if (M_TRAILINGSPACE(mb) == 0) { 702 MGET(mb2, M_WAIT, MT_DATA); 703 if (siz >= MINCLSIZE) 704 MCLGET(mb2, M_WAIT); 705 mb->m_next = mb2; 706 mb = mb2; 707 mb->m_len = 0; 708 bpos = mtod(mb, caddr_t); 709 } 710 i = min(siz, M_TRAILINGSPACE(mb)); 711 memcpy(bpos, auth_str, i); 712 mb->m_len += i; 713 auth_str += i; 714 bpos += i; 715 siz -= i; 716 } 717 if ((siz = (nfsm_rndup(auth_len) - auth_len)) > 0) { 718 for (i = 0; i < siz; i++) 719 *bpos++ = '\0'; 720 mb->m_len += siz; 721 } 722 break; 723 }; 724 725 /* 726 * And the verifier... 727 */ 728 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); 729 if (verf_str) { 730 *tl++ = txdr_unsigned(RPCAUTH_KERB4); 731 *tl = txdr_unsigned(verf_len); 732 siz = verf_len; 733 while (siz > 0) { 734 if (M_TRAILINGSPACE(mb) == 0) { 735 MGET(mb2, M_WAIT, MT_DATA); 736 if (siz >= MINCLSIZE) 737 MCLGET(mb2, M_WAIT); 738 mb->m_next = mb2; 739 mb = mb2; 740 mb->m_len = 0; 741 bpos = mtod(mb, caddr_t); 742 } 743 i = min(siz, M_TRAILINGSPACE(mb)); 744 memcpy(bpos, verf_str, i); 745 mb->m_len += i; 746 verf_str += i; 747 bpos += i; 748 siz -= i; 749 } 750 if ((siz = (nfsm_rndup(verf_len) - verf_len)) > 0) { 751 for (i = 0; i < siz; i++) 752 *bpos++ = '\0'; 753 mb->m_len += siz; 754 } 755 } else { 756 *tl++ = txdr_unsigned(RPCAUTH_NULL); 757 *tl = 0; 758 } 759 mb->m_next = mrest; 760 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len; 761 mreq->m_pkthdr.rcvif = (struct ifnet *)0; 762 *mbp = mb; 763 return (mreq); 764 } 765 766 /* 767 * copies mbuf chain to the uio scatter/gather list 768 */ 769 int 770 nfsm_mbuftouio(mrep, uiop, siz, dpos) 771 struct mbuf **mrep; 772 register struct uio *uiop; 773 int siz; 774 caddr_t *dpos; 775 { 776 register char *mbufcp, *uiocp; 777 register int xfer, left, len; 778 register struct mbuf *mp; 779 long uiosiz, rem; 780 int error = 0; 781 782 mp = *mrep; 783 mbufcp = *dpos; 784 len = mtod(mp, caddr_t)+mp->m_len-mbufcp; 785 rem = nfsm_rndup(siz)-siz; 786 while (siz > 0) { 787 if (uiop->uio_iovcnt <= 0 || uiop->uio_iov == NULL) 788 return (EFBIG); 789 left = uiop->uio_iov->iov_len; 790 uiocp = uiop->uio_iov->iov_base; 791 if (left > siz) 792 left = siz; 793 uiosiz = left; 794 while (left > 0) { 795 while (len == 0) { 796 mp = mp->m_next; 797 if (mp == NULL) 798 return (EBADRPC); 799 mbufcp = mtod(mp, caddr_t); 800 len = mp->m_len; 801 } 802 xfer = (left > len) ? len : left; 803 #ifdef notdef 804 /* Not Yet.. */ 805 if (uiop->uio_iov->iov_op != NULL) 806 (*(uiop->uio_iov->iov_op)) 807 (mbufcp, uiocp, xfer); 808 else 809 #endif 810 if (uiop->uio_segflg == UIO_SYSSPACE) 811 memcpy(uiocp, mbufcp, xfer); 812 else 813 copyout(mbufcp, uiocp, xfer); 814 left -= xfer; 815 len -= xfer; 816 mbufcp += xfer; 817 uiocp += xfer; 818 uiop->uio_offset += xfer; 819 uiop->uio_resid -= xfer; 820 } 821 if (uiop->uio_iov->iov_len <= siz) { 822 uiop->uio_iovcnt--; 823 uiop->uio_iov++; 824 } else { 825 (caddr_t)uiop->uio_iov->iov_base += uiosiz; 826 uiop->uio_iov->iov_len -= uiosiz; 827 } 828 siz -= uiosiz; 829 } 830 *dpos = mbufcp; 831 *mrep = mp; 832 if (rem > 0) { 833 if (len < rem) 834 error = nfs_adv(mrep, dpos, rem, len); 835 else 836 *dpos += rem; 837 } 838 return (error); 839 } 840 841 /* 842 * copies a uio scatter/gather list to an mbuf chain. 843 * NOTE: can ony handle iovcnt == 1 844 */ 845 int 846 nfsm_uiotombuf(uiop, mq, siz, bpos) 847 register struct uio *uiop; 848 struct mbuf **mq; 849 int siz; 850 caddr_t *bpos; 851 { 852 register char *uiocp; 853 register struct mbuf *mp, *mp2; 854 register int xfer, left, mlen; 855 int uiosiz, clflg, rem; 856 char *cp; 857 858 #ifdef DIAGNOSTIC 859 if (uiop->uio_iovcnt != 1) 860 panic("nfsm_uiotombuf: iovcnt != 1"); 861 #endif 862 863 if (siz > MLEN) /* or should it >= MCLBYTES ?? */ 864 clflg = 1; 865 else 866 clflg = 0; 867 rem = nfsm_rndup(siz)-siz; 868 mp = mp2 = *mq; 869 while (siz > 0) { 870 left = uiop->uio_iov->iov_len; 871 uiocp = uiop->uio_iov->iov_base; 872 if (left > siz) 873 left = siz; 874 uiosiz = left; 875 while (left > 0) { 876 mlen = M_TRAILINGSPACE(mp); 877 if (mlen == 0) { 878 MGET(mp, M_WAIT, MT_DATA); 879 if (clflg) 880 MCLGET(mp, M_WAIT); 881 mp->m_len = 0; 882 mp2->m_next = mp; 883 mp2 = mp; 884 mlen = M_TRAILINGSPACE(mp); 885 } 886 xfer = (left > mlen) ? mlen : left; 887 #ifdef notdef 888 /* Not Yet.. */ 889 if (uiop->uio_iov->iov_op != NULL) 890 (*(uiop->uio_iov->iov_op)) 891 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 892 else 893 #endif 894 if (uiop->uio_segflg == UIO_SYSSPACE) 895 memcpy(mtod(mp, caddr_t)+mp->m_len, uiocp, xfer); 896 else 897 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer); 898 mp->m_len += xfer; 899 left -= xfer; 900 uiocp += xfer; 901 uiop->uio_offset += xfer; 902 uiop->uio_resid -= xfer; 903 } 904 (caddr_t)uiop->uio_iov->iov_base += uiosiz; 905 uiop->uio_iov->iov_len -= uiosiz; 906 siz -= uiosiz; 907 } 908 if (rem > 0) { 909 if (rem > M_TRAILINGSPACE(mp)) { 910 MGET(mp, M_WAIT, MT_DATA); 911 mp->m_len = 0; 912 mp2->m_next = mp; 913 } 914 cp = mtod(mp, caddr_t)+mp->m_len; 915 for (left = 0; left < rem; left++) 916 *cp++ = '\0'; 917 mp->m_len += rem; 918 *bpos = cp; 919 } else 920 *bpos = mtod(mp, caddr_t)+mp->m_len; 921 *mq = mp; 922 return (0); 923 } 924 925 /* 926 * Get at least "siz" bytes of correctly aligned data. 927 * When called the mbuf pointers are not necessarily correct, 928 * dsosp points to what ought to be in m_data and left contains 929 * what ought to be in m_len. 930 * This is used by the macros nfsm_dissect and nfsm_dissecton for tough 931 * cases. (The macros use the vars. dpos and dpos2) 932 */ 933 int 934 nfsm_disct(mdp, dposp, siz, left, cp2) 935 struct mbuf **mdp; 936 caddr_t *dposp; 937 int siz; 938 int left; 939 caddr_t *cp2; 940 { 941 register struct mbuf *m1, *m2; 942 struct mbuf *havebuf = NULL; 943 caddr_t src = *dposp; 944 caddr_t dst; 945 int len; 946 947 #ifdef DEBUG 948 if (left < 0) 949 panic("nfsm_disct: left < 0"); 950 #endif 951 m1 = *mdp; 952 /* 953 * Skip through the mbuf chain looking for an mbuf with 954 * some data. If the first mbuf found has enough data 955 * and it is correctly aligned return it. 956 */ 957 while (left == 0) { 958 havebuf = m1; 959 *mdp = m1 = m1->m_next; 960 if (m1 == NULL) 961 return (EBADRPC); 962 src = mtod(m1, caddr_t); 963 left = m1->m_len; 964 /* 965 * If we start a new mbuf and it is big enough 966 * and correctly aligned just return it, don't 967 * do any pull up. 968 */ 969 if (left >= siz && nfsm_aligned(src)) { 970 *cp2 = src; 971 *dposp = src + siz; 972 return (0); 973 } 974 } 975 if (m1->m_flags & M_EXT) { 976 if (havebuf) { 977 /* If the first mbuf with data has external data 978 * and there is a previous empty mbuf use it 979 * to move the data into. 980 */ 981 m2 = m1; 982 *mdp = m1 = havebuf; 983 if (m1->m_flags & M_EXT) { 984 MEXTREMOVE(m1); 985 } 986 } else { 987 /* 988 * If the first mbuf has a external data 989 * and there is no previous empty mbuf 990 * allocate a new mbuf and move the external 991 * data to the new mbuf. Also make the first 992 * mbuf look empty. 993 */ 994 m2 = m_get(M_WAIT, MT_DATA); 995 m2->m_ext = m1->m_ext; 996 m2->m_data = src; 997 m2->m_len = left; 998 MCLADDREFERENCE(m1, m2); 999 MEXTREMOVE(m1); 1000 m2->m_next = m1->m_next; 1001 m1->m_next = m2; 1002 } 1003 m1->m_len = 0; 1004 dst = m1->m_dat; 1005 } else { 1006 /* 1007 * If the first mbuf has no external data 1008 * move the data to the front of the mbuf. 1009 */ 1010 if ((dst = m1->m_dat) != src) 1011 memmove(dst, src, left); 1012 dst += left; 1013 m1->m_len = left; 1014 m2 = m1->m_next; 1015 } 1016 m1->m_flags &= ~M_PKTHDR; 1017 *cp2 = m1->m_data = m1->m_dat; /* data is at beginning of buffer */ 1018 *dposp = mtod(m1, caddr_t) + siz; 1019 /* 1020 * Loop through mbufs pulling data up into first mbuf until 1021 * the first mbuf is full or there is no more data to 1022 * pullup. 1023 */ 1024 while ((len = (MLEN - m1->m_len)) != 0 && m2) { 1025 if ((len = min(len, m2->m_len)) != 0) 1026 memcpy(dst, m2->m_data, len); 1027 m1->m_len += len; 1028 dst += len; 1029 m2->m_data += len; 1030 m2->m_len -= len; 1031 m2 = m2->m_next; 1032 } 1033 if (m1->m_len < siz) 1034 return (EBADRPC); 1035 return (0); 1036 } 1037 1038 /* 1039 * Advance the position in the mbuf chain. 1040 */ 1041 int 1042 nfs_adv(mdp, dposp, offs, left) 1043 struct mbuf **mdp; 1044 caddr_t *dposp; 1045 int offs; 1046 int left; 1047 { 1048 register struct mbuf *m; 1049 register int s; 1050 1051 m = *mdp; 1052 s = left; 1053 while (s < offs) { 1054 offs -= s; 1055 m = m->m_next; 1056 if (m == NULL) 1057 return (EBADRPC); 1058 s = m->m_len; 1059 } 1060 *mdp = m; 1061 *dposp = mtod(m, caddr_t)+offs; 1062 return (0); 1063 } 1064 1065 /* 1066 * Copy a string into mbufs for the hard cases... 1067 */ 1068 int 1069 nfsm_strtmbuf(mb, bpos, cp, siz) 1070 struct mbuf **mb; 1071 char **bpos; 1072 const char *cp; 1073 long siz; 1074 { 1075 register struct mbuf *m1 = NULL, *m2; 1076 long left, xfer, len, tlen; 1077 u_int32_t *tl; 1078 int putsize; 1079 1080 putsize = 1; 1081 m2 = *mb; 1082 left = M_TRAILINGSPACE(m2); 1083 if (left > 0) { 1084 tl = ((u_int32_t *)(*bpos)); 1085 *tl++ = txdr_unsigned(siz); 1086 putsize = 0; 1087 left -= NFSX_UNSIGNED; 1088 m2->m_len += NFSX_UNSIGNED; 1089 if (left > 0) { 1090 memcpy((caddr_t) tl, cp, left); 1091 siz -= left; 1092 cp += left; 1093 m2->m_len += left; 1094 left = 0; 1095 } 1096 } 1097 /* Loop around adding mbufs */ 1098 while (siz > 0) { 1099 MGET(m1, M_WAIT, MT_DATA); 1100 if (siz > MLEN) 1101 MCLGET(m1, M_WAIT); 1102 m1->m_len = NFSMSIZ(m1); 1103 m2->m_next = m1; 1104 m2 = m1; 1105 tl = mtod(m1, u_int32_t *); 1106 tlen = 0; 1107 if (putsize) { 1108 *tl++ = txdr_unsigned(siz); 1109 m1->m_len -= NFSX_UNSIGNED; 1110 tlen = NFSX_UNSIGNED; 1111 putsize = 0; 1112 } 1113 if (siz < m1->m_len) { 1114 len = nfsm_rndup(siz); 1115 xfer = siz; 1116 if (xfer < len) 1117 *(tl+(xfer>>2)) = 0; 1118 } else { 1119 xfer = len = m1->m_len; 1120 } 1121 memcpy((caddr_t) tl, cp, xfer); 1122 m1->m_len = len+tlen; 1123 siz -= xfer; 1124 cp += xfer; 1125 } 1126 *mb = m1; 1127 *bpos = mtod(m1, caddr_t)+m1->m_len; 1128 return (0); 1129 } 1130 1131 /* 1132 * Directory caching routines. They work as follows: 1133 * - a cache is maintained per VDIR nfsnode. 1134 * - for each offset cookie that is exported to userspace, and can 1135 * thus be thrown back at us as an offset to VOP_READDIR, store 1136 * information in the cache. 1137 * - cached are: 1138 * - cookie itself 1139 * - blocknumber (essentially just a search key in the buffer cache) 1140 * - entry number in block. 1141 * - offset cookie of block in which this entry is stored 1142 * - 32 bit cookie if NFSMNT_XLATECOOKIE is used. 1143 * - entries are looked up in a hash table 1144 * - also maintained is an LRU list of entries, used to determine 1145 * which ones to delete if the cache grows too large. 1146 * - if 32 <-> 64 translation mode is requested for a filesystem, 1147 * the cache also functions as a translation table 1148 * - in the translation case, invalidating the cache does not mean 1149 * flushing it, but just marking entries as invalid, except for 1150 * the <64bit cookie, 32bitcookie> pair which is still valid, to 1151 * still be able to use the cache as a translation table. 1152 * - 32 bit cookies are uniquely created by combining the hash table 1153 * entry value, and one generation count per hash table entry, 1154 * incremented each time an entry is appended to the chain. 1155 * - the cache is invalidated each time a direcory is modified 1156 * - sanity checks are also done; if an entry in a block turns 1157 * out not to have a matching cookie, the cache is invalidated 1158 * and a new block starting from the wanted offset is fetched from 1159 * the server. 1160 * - directory entries as read from the server are extended to contain 1161 * the 64bit and, optionally, the 32bit cookies, for sanity checking 1162 * the cache and exporting them to userspace through the cookie 1163 * argument to VOP_READDIR. 1164 */ 1165 1166 u_long 1167 nfs_dirhash(off) 1168 off_t off; 1169 { 1170 int i; 1171 char *cp = (char *)&off; 1172 u_long sum = 0L; 1173 1174 for (i = 0 ; i < sizeof (off); i++) 1175 sum += *cp++; 1176 1177 return sum; 1178 } 1179 1180 void 1181 nfs_initdircache(vp) 1182 struct vnode *vp; 1183 { 1184 struct nfsnode *np = VTONFS(vp); 1185 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1186 1187 np->n_dircachesize = 0; 1188 np->n_dblkno = 1; 1189 np->n_dircache = 1190 hashinit(NFS_DIRHASHSIZ, M_NFSDIROFF, M_WAITOK, &nfsdirhashmask); 1191 TAILQ_INIT(&np->n_dirchain); 1192 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1193 MALLOC(np->n_dirgens, unsigned *, 1194 NFS_DIRHASHSIZ * sizeof (unsigned), M_NFSDIROFF, 1195 M_WAITOK); 1196 memset((caddr_t)np->n_dirgens, 0, 1197 NFS_DIRHASHSIZ * sizeof (unsigned)); 1198 } 1199 } 1200 1201 static struct nfsdircache dzero = {0, 0, {0, 0}, {0, 0}, 0, 0, 0}; 1202 1203 struct nfsdircache * 1204 nfs_searchdircache(vp, off, do32, hashent) 1205 struct vnode *vp; 1206 off_t off; 1207 int do32; 1208 int *hashent; 1209 { 1210 struct nfsdirhashhead *ndhp; 1211 struct nfsdircache *ndp = NULL; 1212 struct nfsnode *np = VTONFS(vp); 1213 unsigned ent; 1214 1215 /* 1216 * Zero is always a valid cookie. 1217 */ 1218 if (off == 0) 1219 return &dzero; 1220 1221 /* 1222 * We use a 32bit cookie as search key, directly reconstruct 1223 * the hashentry. Else use the hashfunction. 1224 */ 1225 if (do32) { 1226 ent = (u_int32_t)off >> 24; 1227 if (ent >= NFS_DIRHASHSIZ) 1228 return NULL; 1229 ndhp = &np->n_dircache[ent]; 1230 } else { 1231 ndhp = NFSDIRHASH(np, off); 1232 } 1233 1234 if (hashent) 1235 *hashent = (int)(ndhp - np->n_dircache); 1236 if (do32) { 1237 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) { 1238 if (ndp->dc_cookie32 == (u_int32_t)off) { 1239 /* 1240 * An invalidated entry will become the 1241 * start of a new block fetched from 1242 * the server. 1243 */ 1244 if (ndp->dc_blkno == -1) { 1245 ndp->dc_blkcookie = ndp->dc_cookie; 1246 ndp->dc_blkno = np->n_dblkno++; 1247 ndp->dc_entry = 0; 1248 } 1249 break; 1250 } 1251 } 1252 } else { 1253 for (ndp = ndhp->lh_first; ndp; ndp = ndp->dc_hash.le_next) 1254 if (ndp->dc_cookie == off) 1255 break; 1256 } 1257 return ndp; 1258 } 1259 1260 1261 struct nfsdircache * 1262 nfs_enterdircache(vp, off, blkoff, en, blkno) 1263 struct vnode *vp; 1264 off_t off, blkoff; 1265 daddr_t blkno; 1266 int en; 1267 { 1268 struct nfsnode *np = VTONFS(vp); 1269 struct nfsdirhashhead *ndhp; 1270 struct nfsdircache *ndp = NULL, *first; 1271 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1272 int hashent, gen, overwrite; 1273 1274 if (!np->n_dircache) 1275 /* 1276 * XXX would like to do this in nfs_nget but vtype 1277 * isn't known at that time. 1278 */ 1279 nfs_initdircache(vp); 1280 1281 /* 1282 * XXX refuse entries for offset 0. amd(8) erroneously sets 1283 * cookie 0 for the '.' entry, making this necessary. This 1284 * isn't so bad, as 0 is a special case anyway. 1285 */ 1286 if (off == 0) 1287 return &dzero; 1288 1289 ndp = nfs_searchdircache(vp, off, 0, &hashent); 1290 1291 if (ndp && ndp->dc_blkno != -1) { 1292 /* 1293 * Overwriting an old entry. Check if it's the same. 1294 * If so, just return. If not, remove the old entry. 1295 */ 1296 if (ndp->dc_blkcookie == blkoff && ndp->dc_entry == en) 1297 return ndp; 1298 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1299 LIST_REMOVE(ndp, dc_hash); 1300 FREE(ndp, M_NFSDIROFF); 1301 ndp = 0; 1302 } 1303 1304 ndhp = &np->n_dircache[hashent]; 1305 1306 if (!ndp) { 1307 MALLOC(ndp, struct nfsdircache *, sizeof (*ndp), M_NFSDIROFF, 1308 M_WAITOK); 1309 overwrite = 0; 1310 if (nmp->nm_flag & NFSMNT_XLATECOOKIE) { 1311 /* 1312 * We're allocating a new entry, so bump the 1313 * generation number. 1314 */ 1315 gen = ++np->n_dirgens[hashent]; 1316 if (gen == 0) { 1317 np->n_dirgens[hashent]++; 1318 gen++; 1319 } 1320 ndp->dc_cookie32 = (hashent << 24) | (gen & 0xffffff); 1321 } 1322 } else 1323 overwrite = 1; 1324 1325 /* 1326 * If the entry number is 0, we are at the start of a new block, so 1327 * allocate a new blocknumber. 1328 */ 1329 if (en == 0) 1330 ndp->dc_blkno = np->n_dblkno++; 1331 else 1332 ndp->dc_blkno = blkno; 1333 1334 ndp->dc_cookie = off; 1335 ndp->dc_blkcookie = blkoff; 1336 ndp->dc_entry = en; 1337 1338 if (overwrite) 1339 return ndp; 1340 1341 /* 1342 * If the maximum directory cookie cache size has been reached 1343 * for this node, take one off the front. The idea is that 1344 * directories are typically read front-to-back once, so that 1345 * the oldest entries can be thrown away without much performance 1346 * loss. 1347 */ 1348 if (np->n_dircachesize == NFS_MAXDIRCACHE) { 1349 first = np->n_dirchain.tqh_first; 1350 TAILQ_REMOVE(&np->n_dirchain, first, dc_chain); 1351 LIST_REMOVE(first, dc_hash); 1352 FREE(first, M_NFSDIROFF); 1353 } else 1354 np->n_dircachesize++; 1355 1356 LIST_INSERT_HEAD(ndhp, ndp, dc_hash); 1357 TAILQ_INSERT_TAIL(&np->n_dirchain, ndp, dc_chain); 1358 return ndp; 1359 } 1360 1361 void 1362 nfs_invaldircache(vp, forcefree) 1363 struct vnode *vp; 1364 int forcefree; 1365 { 1366 struct nfsnode *np = VTONFS(vp); 1367 struct nfsdircache *ndp = NULL; 1368 struct nfsmount *nmp = VFSTONFS(vp->v_mount); 1369 1370 #ifdef DIAGNOSTIC 1371 if (vp->v_type != VDIR) 1372 panic("nfs: invaldircache: not dir"); 1373 #endif 1374 1375 if (!np->n_dircache) 1376 return; 1377 1378 if (!(nmp->nm_flag & NFSMNT_XLATECOOKIE) || forcefree) { 1379 while ((ndp = np->n_dirchain.tqh_first)) { 1380 TAILQ_REMOVE(&np->n_dirchain, ndp, dc_chain); 1381 LIST_REMOVE(ndp, dc_hash); 1382 FREE(ndp, M_NFSDIROFF); 1383 } 1384 np->n_dircachesize = 0; 1385 if (forcefree && np->n_dirgens) { 1386 FREE(np->n_dirgens, M_NFSDIROFF); 1387 } 1388 } else { 1389 for (ndp = np->n_dirchain.tqh_first; ndp; 1390 ndp = ndp->dc_chain.tqe_next) 1391 ndp->dc_blkno = -1; 1392 } 1393 1394 np->n_dblkno = 1; 1395 } 1396 1397 /* 1398 * Called once before VFS init to initialize shared and 1399 * server-specific data structures. 1400 */ 1401 void 1402 nfs_init() 1403 { 1404 1405 #if !defined(alpha) && defined(DIAGNOSTIC) 1406 /* 1407 * Check to see if major data structures haven't bloated. 1408 */ 1409 if (sizeof (struct nfsnode) > NFS_NODEALLOC) { 1410 printf("struct nfsnode bloated (> %dbytes)\n", NFS_NODEALLOC); 1411 printf("Try reducing NFS_SMALLFH\n"); 1412 } 1413 if (sizeof (struct nfssvc_sock) > NFS_SVCALLOC) { 1414 printf("struct nfssvc_sock bloated (> %dbytes)\n",NFS_SVCALLOC); 1415 printf("Try reducing NFS_UIDHASHSIZ\n"); 1416 } 1417 if (sizeof (struct nfsuid) > NFS_UIDALLOC) { 1418 printf("struct nfsuid bloated (> %dbytes)\n",NFS_UIDALLOC); 1419 printf("Try unionizing the nu_nickname and nu_flag fields\n"); 1420 } 1421 #endif 1422 1423 nfsrtt.pos = 0; 1424 rpc_vers = txdr_unsigned(RPC_VER2); 1425 rpc_call = txdr_unsigned(RPC_CALL); 1426 rpc_reply = txdr_unsigned(RPC_REPLY); 1427 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED); 1428 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED); 1429 rpc_mismatch = txdr_unsigned(RPC_MISMATCH); 1430 rpc_autherr = txdr_unsigned(RPC_AUTHERR); 1431 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX); 1432 rpc_auth_kerb = txdr_unsigned(RPCAUTH_KERB4); 1433 nfs_prog = txdr_unsigned(NFS_PROG); 1434 nqnfs_prog = txdr_unsigned(NQNFS_PROG); 1435 nfs_true = txdr_unsigned(TRUE); 1436 nfs_false = txdr_unsigned(FALSE); 1437 nfs_xdrneg1 = txdr_unsigned(-1); 1438 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000; 1439 if (nfs_ticks < 1) 1440 nfs_ticks = 1; 1441 #ifdef NFSSERVER 1442 nfsrv_init(0); /* Init server data structures */ 1443 nfsrv_initcache(); /* Init the server request cache */ 1444 #endif /* NFSSERVER */ 1445 1446 /* 1447 * Initialize the nqnfs data structures. 1448 */ 1449 if (nqnfsstarttime == 0) { 1450 nqnfsstarttime = boottime.tv_sec + nqsrv_maxlease 1451 + nqsrv_clockskew + nqsrv_writeslack; 1452 NQLOADNOVRAM(nqnfsstarttime); 1453 CIRCLEQ_INIT(&nqtimerhead); 1454 nqfhhashtbl = hashinit(NQLCHSZ, M_NQLEASE, M_WAITOK, &nqfhhash); 1455 } 1456 1457 /* 1458 * Initialize reply list and start timer 1459 */ 1460 TAILQ_INIT(&nfs_reqq); 1461 nfs_timer(NULL); 1462 } 1463 1464 #ifdef NFS 1465 /* 1466 * Called once at VFS init to initialize client-specific data structures. 1467 */ 1468 void 1469 nfs_vfs_init() 1470 { 1471 register int i; 1472 1473 /* Ensure async daemons disabled */ 1474 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) { 1475 nfs_iodwant[i] = (struct proc *)0; 1476 nfs_iodmount[i] = (struct nfsmount *)0; 1477 } 1478 nfs_nhinit(); /* Init the nfsnode table */ 1479 } 1480 1481 /* 1482 * Attribute cache routines. 1483 * nfs_loadattrcache() - loads or updates the cache contents from attributes 1484 * that are on the mbuf list 1485 * nfs_getattrcache() - returns valid attributes if found in cache, returns 1486 * error otherwise 1487 */ 1488 1489 /* 1490 * Load the attribute cache (that lives in the nfsnode entry) with 1491 * the values on the mbuf list and 1492 * Iff vap not NULL 1493 * copy the attributes to *vaper 1494 */ 1495 int 1496 nfsm_loadattrcache(vpp, mdp, dposp, vaper) 1497 struct vnode **vpp; 1498 struct mbuf **mdp; 1499 caddr_t *dposp; 1500 struct vattr *vaper; 1501 { 1502 register int32_t t1; 1503 caddr_t cp2; 1504 int error = 0; 1505 struct mbuf *md; 1506 int v3 = NFS_ISV3(*vpp); 1507 1508 md = *mdp; 1509 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp; 1510 error = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, &cp2); 1511 if (error) 1512 return (error); 1513 return nfs_loadattrcache(vpp, (struct nfs_fattr *)cp2, vaper); 1514 } 1515 1516 int 1517 nfs_loadattrcache(vpp, fp, vaper) 1518 struct vnode **vpp; 1519 struct nfs_fattr *fp; 1520 struct vattr *vaper; 1521 { 1522 register struct vnode *vp = *vpp; 1523 register struct vattr *vap; 1524 int v3 = NFS_ISV3(vp); 1525 enum vtype vtyp; 1526 u_short vmode; 1527 struct timespec mtime; 1528 struct vnode *nvp; 1529 int32_t rdev; 1530 register struct nfsnode *np; 1531 extern int (**spec_nfsv2nodeop_p) __P((void *)); 1532 1533 if (v3) { 1534 vtyp = nfsv3tov_type(fp->fa_type); 1535 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1536 rdev = makedev(fxdr_unsigned(u_char, fp->fa3_rdev.specdata1), 1537 fxdr_unsigned(u_char, fp->fa3_rdev.specdata2)); 1538 fxdr_nfsv3time(&fp->fa3_mtime, &mtime); 1539 } else { 1540 vtyp = nfsv2tov_type(fp->fa_type); 1541 vmode = fxdr_unsigned(u_short, fp->fa_mode); 1542 if (vtyp == VNON || vtyp == VREG) 1543 vtyp = IFTOVT(vmode); 1544 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev); 1545 fxdr_nfsv2time(&fp->fa2_mtime, &mtime); 1546 1547 /* 1548 * Really ugly NFSv2 kludge. 1549 */ 1550 if (vtyp == VCHR && rdev == 0xffffffff) 1551 vtyp = VFIFO; 1552 } 1553 1554 /* 1555 * If v_type == VNON it is a new node, so fill in the v_type, 1556 * n_mtime fields. Check to see if it represents a special 1557 * device, and if so, check for a possible alias. Once the 1558 * correct vnode has been obtained, fill in the rest of the 1559 * information. 1560 */ 1561 np = VTONFS(vp); 1562 if (vp->v_type != vtyp) { 1563 vp->v_type = vtyp; 1564 if (vp->v_type == VFIFO) { 1565 extern int (**fifo_nfsv2nodeop_p) __P((void *)); 1566 vp->v_op = fifo_nfsv2nodeop_p; 1567 } 1568 if (vp->v_type == VCHR || vp->v_type == VBLK) { 1569 vp->v_op = spec_nfsv2nodeop_p; 1570 nvp = checkalias(vp, (dev_t)rdev, vp->v_mount); 1571 if (nvp) { 1572 /* 1573 * Discard unneeded vnode, but save its nfsnode. 1574 * Since the nfsnode does not have a lock, its 1575 * vnode lock has to be carried over. 1576 */ 1577 nvp->v_vnlock = vp->v_vnlock; 1578 vp->v_vnlock = NULL; 1579 nvp->v_data = vp->v_data; 1580 vp->v_data = NULL; 1581 vp->v_op = spec_vnodeop_p; 1582 vrele(vp); 1583 vgone(vp); 1584 /* 1585 * Reinitialize aliased node. 1586 */ 1587 np->n_vnode = nvp; 1588 *vpp = vp = nvp; 1589 } 1590 } 1591 np->n_mtime = mtime.tv_sec; 1592 } 1593 vap = np->n_vattr; 1594 vap->va_type = vtyp; 1595 vap->va_mode = vmode & ALLPERMS; 1596 vap->va_rdev = (dev_t)rdev; 1597 vap->va_mtime = mtime; 1598 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0]; 1599 if (v3) { 1600 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1601 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1602 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1603 fxdr_hyper(&fp->fa3_size, &vap->va_size); 1604 if (vtyp == VDIR) 1605 vap->va_blocksize = NFS_DIRFRAGSIZ; 1606 else 1607 vap->va_blocksize = NFS_FABLKSIZE; 1608 fxdr_hyper(&fp->fa3_used, &vap->va_bytes); 1609 vap->va_fileid = fxdr_unsigned(int32_t, 1610 fp->fa3_fileid.nfsuquad[1]); 1611 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime); 1612 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime); 1613 vap->va_flags = 0; 1614 vap->va_filerev = 0; 1615 } else { 1616 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink); 1617 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid); 1618 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid); 1619 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size); 1620 if (vtyp == VDIR) 1621 vap->va_blocksize = NFS_DIRFRAGSIZ; 1622 else 1623 vap->va_blocksize = 1624 fxdr_unsigned(int32_t, fp->fa2_blocksize); 1625 vap->va_bytes = fxdr_unsigned(int32_t, fp->fa2_blocks) 1626 * NFS_FABLKSIZE; 1627 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid); 1628 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime); 1629 vap->va_flags = 0; 1630 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t, 1631 fp->fa2_ctime.nfsv2_sec); 1632 vap->va_ctime.tv_nsec = 0; 1633 vap->va_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec); 1634 vap->va_filerev = 0; 1635 } 1636 if (vap->va_size != np->n_size) { 1637 if (vap->va_type == VREG) { 1638 if (np->n_flag & NMODIFIED) { 1639 if (vap->va_size < np->n_size) 1640 vap->va_size = np->n_size; 1641 else 1642 np->n_size = vap->va_size; 1643 } else 1644 np->n_size = vap->va_size; 1645 #if defined(UVM) 1646 uvm_vnp_setsize(vp, np->n_size); 1647 #else 1648 vnode_pager_setsize(vp, np->n_size); 1649 #endif 1650 } else 1651 np->n_size = vap->va_size; 1652 } 1653 np->n_attrstamp = time.tv_sec; 1654 if (vaper != NULL) { 1655 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(*vap)); 1656 if (np->n_flag & NCHG) { 1657 if (np->n_flag & NACC) 1658 vaper->va_atime = np->n_atim; 1659 if (np->n_flag & NUPD) 1660 vaper->va_mtime = np->n_mtim; 1661 } 1662 } 1663 return (0); 1664 } 1665 1666 /* 1667 * Check the time stamp 1668 * If the cache is valid, copy contents to *vap and return 0 1669 * otherwise return an error 1670 */ 1671 int 1672 nfs_getattrcache(vp, vaper) 1673 register struct vnode *vp; 1674 struct vattr *vaper; 1675 { 1676 register struct nfsnode *np = VTONFS(vp); 1677 register struct vattr *vap; 1678 1679 if ((time.tv_sec - np->n_attrstamp) >= NFS_ATTRTIMEO(np)) { 1680 nfsstats.attrcache_misses++; 1681 return (ENOENT); 1682 } 1683 nfsstats.attrcache_hits++; 1684 vap = np->n_vattr; 1685 if (vap->va_size != np->n_size) { 1686 if (vap->va_type == VREG) { 1687 if (np->n_flag & NMODIFIED) { 1688 if (vap->va_size < np->n_size) 1689 vap->va_size = np->n_size; 1690 else 1691 np->n_size = vap->va_size; 1692 } else 1693 np->n_size = vap->va_size; 1694 #if defined(UVM) 1695 uvm_vnp_setsize(vp, np->n_size); 1696 #else 1697 vnode_pager_setsize(vp, np->n_size); 1698 #endif 1699 } else 1700 np->n_size = vap->va_size; 1701 } 1702 memcpy((caddr_t)vaper, (caddr_t)vap, sizeof(struct vattr)); 1703 if (np->n_flag & NCHG) { 1704 if (np->n_flag & NACC) 1705 vaper->va_atime = np->n_atim; 1706 if (np->n_flag & NUPD) 1707 vaper->va_mtime = np->n_mtim; 1708 } 1709 return (0); 1710 } 1711 1712 /* 1713 * Heuristic to see if the server XDR encodes directory cookies or not. 1714 * it is not supposed to, but a lot of servers may do this. Also, since 1715 * most/all servers will implement V2 as well, it is expected that they 1716 * may return just 32 bits worth of cookie information, so we need to 1717 * find out in which 32 bits this information is available. We do this 1718 * to avoid trouble with emulated binaries that can't handle 64 bit 1719 * directory offsets. 1720 */ 1721 1722 void 1723 nfs_cookieheuristic(vp, flagp, p, cred) 1724 struct vnode *vp; 1725 int *flagp; 1726 struct proc *p; 1727 struct ucred *cred; 1728 { 1729 struct uio auio; 1730 struct iovec aiov; 1731 caddr_t buf, cp; 1732 struct dirent *dp; 1733 off_t *cookies = NULL, *cop; 1734 int error, eof, nc, len; 1735 1736 MALLOC(buf, caddr_t, NFS_DIRFRAGSIZ, M_TEMP, M_WAITOK); 1737 1738 aiov.iov_base = buf; 1739 aiov.iov_len = NFS_DIRFRAGSIZ; 1740 auio.uio_iov = &aiov; 1741 auio.uio_iovcnt = 1; 1742 auio.uio_rw = UIO_READ; 1743 auio.uio_segflg = UIO_SYSSPACE; 1744 auio.uio_procp = p; 1745 auio.uio_resid = NFS_DIRFRAGSIZ; 1746 auio.uio_offset = 0; 1747 1748 error = VOP_READDIR(vp, &auio, cred, &eof, &cookies, &nc); 1749 1750 len = NFS_DIRFRAGSIZ - auio.uio_resid; 1751 if (error || len == 0) { 1752 FREE(buf, M_TEMP); 1753 if (cookies) 1754 FREE(cookies, M_TEMP); 1755 return; 1756 } 1757 1758 /* 1759 * Find the first valid entry and look at its offset cookie. 1760 */ 1761 1762 cp = buf; 1763 for (cop = cookies; len > 0; len -= dp->d_reclen) { 1764 dp = (struct dirent *)cp; 1765 if (dp->d_fileno != 0 && len >= dp->d_reclen) { 1766 if ((*cop >> 32) != 0 && (*cop & 0xffffffffLL) == 0) { 1767 *flagp |= NFSMNT_SWAPCOOKIE; 1768 nfs_invaldircache(vp, 0); 1769 nfs_vinvalbuf(vp, 0, cred, p, 1); 1770 } 1771 break; 1772 } 1773 cop++; 1774 cp += dp->d_reclen; 1775 } 1776 1777 FREE(buf, M_TEMP); 1778 FREE(cookies, M_TEMP); 1779 } 1780 #endif /* NFS */ 1781 1782 /* 1783 * Set up nameidata for a lookup() call and do it. 1784 * 1785 * If pubflag is set, this call is done for a lookup operation on the 1786 * public filehandle. In that case we allow crossing mountpoints and 1787 * absolute pathnames. However, the caller is expected to check that 1788 * the lookup result is within the public fs, and deny access if 1789 * it is not. 1790 */ 1791 int 1792 nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, retdirp, p, kerbflag, pubflag) 1793 register struct nameidata *ndp; 1794 fhandle_t *fhp; 1795 int len; 1796 struct nfssvc_sock *slp; 1797 struct mbuf *nam; 1798 struct mbuf **mdp; 1799 caddr_t *dposp; 1800 struct vnode **retdirp; 1801 struct proc *p; 1802 int kerbflag, pubflag; 1803 { 1804 register int i, rem; 1805 register struct mbuf *md; 1806 register char *fromcp, *tocp, *cp; 1807 struct iovec aiov; 1808 struct uio auio; 1809 struct vnode *dp; 1810 int error, rdonly, linklen; 1811 struct componentname *cnp = &ndp->ni_cnd; 1812 1813 *retdirp = (struct vnode *)0; 1814 MALLOC(cnp->cn_pnbuf, char *, len + 1, M_NAMEI, M_WAITOK); 1815 /* 1816 * Copy the name from the mbuf list to ndp->ni_pnbuf 1817 * and set the various ndp fields appropriately. 1818 */ 1819 fromcp = *dposp; 1820 tocp = cnp->cn_pnbuf; 1821 md = *mdp; 1822 rem = mtod(md, caddr_t) + md->m_len - fromcp; 1823 for (i = 0; i < len; i++) { 1824 while (rem == 0) { 1825 md = md->m_next; 1826 if (md == NULL) { 1827 error = EBADRPC; 1828 goto out; 1829 } 1830 fromcp = mtod(md, caddr_t); 1831 rem = md->m_len; 1832 } 1833 if (*fromcp == '\0' || (!pubflag && *fromcp == '/')) { 1834 error = EACCES; 1835 goto out; 1836 } 1837 *tocp++ = *fromcp++; 1838 rem--; 1839 } 1840 *tocp = '\0'; 1841 *mdp = md; 1842 *dposp = fromcp; 1843 len = nfsm_rndup(len)-len; 1844 if (len > 0) { 1845 if (rem >= len) 1846 *dposp += len; 1847 else if ((error = nfs_adv(mdp, dposp, len, rem)) != 0) 1848 goto out; 1849 } 1850 1851 /* 1852 * Extract and set starting directory. 1853 */ 1854 error = nfsrv_fhtovp(fhp, FALSE, &dp, ndp->ni_cnd.cn_cred, slp, 1855 nam, &rdonly, kerbflag, pubflag); 1856 if (error) 1857 goto out; 1858 if (dp->v_type != VDIR) { 1859 vrele(dp); 1860 error = ENOTDIR; 1861 goto out; 1862 } 1863 1864 if (rdonly) 1865 cnp->cn_flags |= RDONLY; 1866 1867 *retdirp = dp; 1868 1869 if (pubflag) { 1870 /* 1871 * Oh joy. For WebNFS, handle those pesky '%' escapes, 1872 * and the 'native path' indicator. 1873 */ 1874 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1875 fromcp = cnp->cn_pnbuf; 1876 tocp = cp; 1877 if ((unsigned char)*fromcp >= WEBNFS_SPECCHAR_START) { 1878 switch ((unsigned char)*fromcp) { 1879 case WEBNFS_NATIVE_CHAR: 1880 /* 1881 * 'Native' path for us is the same 1882 * as a path according to the NFS spec, 1883 * just skip the escape char. 1884 */ 1885 fromcp++; 1886 break; 1887 /* 1888 * More may be added in the future, range 0x80-0xff 1889 */ 1890 default: 1891 error = EIO; 1892 FREE(cp, M_NAMEI); 1893 goto out; 1894 } 1895 } 1896 /* 1897 * Translate the '%' escapes, URL-style. 1898 */ 1899 while (*fromcp != '\0') { 1900 if (*fromcp == WEBNFS_ESC_CHAR) { 1901 if (fromcp[1] != '\0' && fromcp[2] != '\0') { 1902 fromcp++; 1903 *tocp++ = HEXSTRTOI(fromcp); 1904 fromcp += 2; 1905 continue; 1906 } else { 1907 error = ENOENT; 1908 FREE(cp, M_NAMEI); 1909 goto out; 1910 } 1911 } else 1912 *tocp++ = *fromcp++; 1913 } 1914 *tocp = '\0'; 1915 FREE(cnp->cn_pnbuf, M_NAMEI); 1916 cnp->cn_pnbuf = cp; 1917 } 1918 1919 ndp->ni_pathlen = (tocp - cnp->cn_pnbuf) + 1; 1920 ndp->ni_segflg = UIO_SYSSPACE; 1921 1922 if (pubflag) { 1923 ndp->ni_rootdir = rootvnode; 1924 ndp->ni_loopcnt = 0; 1925 if (cnp->cn_pnbuf[0] == '/') 1926 dp = rootvnode; 1927 } else { 1928 cnp->cn_flags |= NOCROSSMOUNT; 1929 } 1930 1931 cnp->cn_proc = p; 1932 VREF(dp); 1933 1934 for (;;) { 1935 cnp->cn_nameptr = cnp->cn_pnbuf; 1936 ndp->ni_startdir = dp; 1937 /* 1938 * And call lookup() to do the real work 1939 */ 1940 error = lookup(ndp); 1941 if (error) 1942 break; 1943 /* 1944 * Check for encountering a symbolic link 1945 */ 1946 if ((cnp->cn_flags & ISSYMLINK) == 0) { 1947 if (cnp->cn_flags & (SAVENAME | SAVESTART)) { 1948 cnp->cn_flags |= HASBUF; 1949 return (0); 1950 } 1951 break; 1952 } else { 1953 if ((cnp->cn_flags & LOCKPARENT) && ndp->ni_pathlen == 1) 1954 VOP_UNLOCK(ndp->ni_dvp, 0); 1955 if (!pubflag) { 1956 vrele(ndp->ni_dvp); 1957 vput(ndp->ni_vp); 1958 ndp->ni_vp = NULL; 1959 error = EINVAL; 1960 break; 1961 } 1962 1963 if (ndp->ni_loopcnt++ >= MAXSYMLINKS) { 1964 error = ELOOP; 1965 break; 1966 } 1967 if (ndp->ni_pathlen > 1) 1968 MALLOC(cp, char *, MAXPATHLEN, M_NAMEI, M_WAITOK); 1969 else 1970 cp = cnp->cn_pnbuf; 1971 aiov.iov_base = cp; 1972 aiov.iov_len = MAXPATHLEN; 1973 auio.uio_iov = &aiov; 1974 auio.uio_iovcnt = 1; 1975 auio.uio_offset = 0; 1976 auio.uio_rw = UIO_READ; 1977 auio.uio_segflg = UIO_SYSSPACE; 1978 auio.uio_procp = (struct proc *)0; 1979 auio.uio_resid = MAXPATHLEN; 1980 error = VOP_READLINK(ndp->ni_vp, &auio, cnp->cn_cred); 1981 if (error) { 1982 badlink: 1983 if (ndp->ni_pathlen > 1) 1984 FREE(cp, M_NAMEI); 1985 break; 1986 } 1987 linklen = MAXPATHLEN - auio.uio_resid; 1988 if (linklen == 0) { 1989 error = ENOENT; 1990 goto badlink; 1991 } 1992 if (linklen + ndp->ni_pathlen >= MAXPATHLEN) { 1993 error = ENAMETOOLONG; 1994 goto badlink; 1995 } 1996 if (ndp->ni_pathlen > 1) { 1997 memcpy(cp + linklen, ndp->ni_next, ndp->ni_pathlen); 1998 FREE(cnp->cn_pnbuf, M_NAMEI); 1999 cnp->cn_pnbuf = cp; 2000 } else 2001 cnp->cn_pnbuf[linklen] = '\0'; 2002 ndp->ni_pathlen += linklen; 2003 vput(ndp->ni_vp); 2004 dp = ndp->ni_dvp; 2005 /* 2006 * Check if root directory should replace current directory. 2007 */ 2008 if (cnp->cn_pnbuf[0] == '/') { 2009 vrele(dp); 2010 dp = ndp->ni_rootdir; 2011 VREF(dp); 2012 } 2013 } 2014 } 2015 out: 2016 FREE(cnp->cn_pnbuf, M_NAMEI); 2017 return (error); 2018 } 2019 2020 /* 2021 * A fiddled version of m_adj() that ensures null fill to a long 2022 * boundary and only trims off the back end 2023 */ 2024 void 2025 nfsm_adj(mp, len, nul) 2026 struct mbuf *mp; 2027 register int len; 2028 int nul; 2029 { 2030 register struct mbuf *m; 2031 register int count, i; 2032 register char *cp; 2033 2034 /* 2035 * Trim from tail. Scan the mbuf chain, 2036 * calculating its length and finding the last mbuf. 2037 * If the adjustment only affects this mbuf, then just 2038 * adjust and return. Otherwise, rescan and truncate 2039 * after the remaining size. 2040 */ 2041 count = 0; 2042 m = mp; 2043 for (;;) { 2044 count += m->m_len; 2045 if (m->m_next == (struct mbuf *)0) 2046 break; 2047 m = m->m_next; 2048 } 2049 if (m->m_len > len) { 2050 m->m_len -= len; 2051 if (nul > 0) { 2052 cp = mtod(m, caddr_t)+m->m_len-nul; 2053 for (i = 0; i < nul; i++) 2054 *cp++ = '\0'; 2055 } 2056 return; 2057 } 2058 count -= len; 2059 if (count < 0) 2060 count = 0; 2061 /* 2062 * Correct length for chain is "count". 2063 * Find the mbuf with last data, adjust its length, 2064 * and toss data from remaining mbufs on chain. 2065 */ 2066 for (m = mp; m; m = m->m_next) { 2067 if (m->m_len >= count) { 2068 m->m_len = count; 2069 if (nul > 0) { 2070 cp = mtod(m, caddr_t)+m->m_len-nul; 2071 for (i = 0; i < nul; i++) 2072 *cp++ = '\0'; 2073 } 2074 break; 2075 } 2076 count -= m->m_len; 2077 } 2078 for (m = m->m_next;m;m = m->m_next) 2079 m->m_len = 0; 2080 } 2081 2082 /* 2083 * Make these functions instead of macros, so that the kernel text size 2084 * doesn't get too big... 2085 */ 2086 void 2087 nfsm_srvwcc(nfsd, before_ret, before_vap, after_ret, after_vap, mbp, bposp) 2088 struct nfsrv_descript *nfsd; 2089 int before_ret; 2090 register struct vattr *before_vap; 2091 int after_ret; 2092 struct vattr *after_vap; 2093 struct mbuf **mbp; 2094 char **bposp; 2095 { 2096 register struct mbuf *mb = *mbp, *mb2; 2097 register char *bpos = *bposp; 2098 register u_int32_t *tl; 2099 2100 if (before_ret) { 2101 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2102 *tl = nfs_false; 2103 } else { 2104 nfsm_build(tl, u_int32_t *, 7 * NFSX_UNSIGNED); 2105 *tl++ = nfs_true; 2106 txdr_hyper(&(before_vap->va_size), tl); 2107 tl += 2; 2108 txdr_nfsv3time(&(before_vap->va_mtime), tl); 2109 tl += 2; 2110 txdr_nfsv3time(&(before_vap->va_ctime), tl); 2111 } 2112 *bposp = bpos; 2113 *mbp = mb; 2114 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp); 2115 } 2116 2117 void 2118 nfsm_srvpostopattr(nfsd, after_ret, after_vap, mbp, bposp) 2119 struct nfsrv_descript *nfsd; 2120 int after_ret; 2121 struct vattr *after_vap; 2122 struct mbuf **mbp; 2123 char **bposp; 2124 { 2125 register struct mbuf *mb = *mbp, *mb2; 2126 register char *bpos = *bposp; 2127 register u_int32_t *tl; 2128 register struct nfs_fattr *fp; 2129 2130 if (after_ret) { 2131 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); 2132 *tl = nfs_false; 2133 } else { 2134 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FATTR); 2135 *tl++ = nfs_true; 2136 fp = (struct nfs_fattr *)tl; 2137 nfsm_srvfattr(nfsd, after_vap, fp); 2138 } 2139 *mbp = mb; 2140 *bposp = bpos; 2141 } 2142 2143 void 2144 nfsm_srvfattr(nfsd, vap, fp) 2145 register struct nfsrv_descript *nfsd; 2146 register struct vattr *vap; 2147 register struct nfs_fattr *fp; 2148 { 2149 2150 fp->fa_nlink = txdr_unsigned(vap->va_nlink); 2151 fp->fa_uid = txdr_unsigned(vap->va_uid); 2152 fp->fa_gid = txdr_unsigned(vap->va_gid); 2153 if (nfsd->nd_flag & ND_NFSV3) { 2154 fp->fa_type = vtonfsv3_type(vap->va_type); 2155 fp->fa_mode = vtonfsv3_mode(vap->va_mode); 2156 txdr_hyper(&vap->va_size, &fp->fa3_size); 2157 txdr_hyper(&vap->va_bytes, &fp->fa3_used); 2158 fp->fa3_rdev.specdata1 = txdr_unsigned(major(vap->va_rdev)); 2159 fp->fa3_rdev.specdata2 = txdr_unsigned(minor(vap->va_rdev)); 2160 fp->fa3_fsid.nfsuquad[0] = 0; 2161 fp->fa3_fsid.nfsuquad[1] = txdr_unsigned(vap->va_fsid); 2162 fp->fa3_fileid.nfsuquad[0] = 0; 2163 fp->fa3_fileid.nfsuquad[1] = txdr_unsigned(vap->va_fileid); 2164 txdr_nfsv3time(&vap->va_atime, &fp->fa3_atime); 2165 txdr_nfsv3time(&vap->va_mtime, &fp->fa3_mtime); 2166 txdr_nfsv3time(&vap->va_ctime, &fp->fa3_ctime); 2167 } else { 2168 fp->fa_type = vtonfsv2_type(vap->va_type); 2169 fp->fa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); 2170 fp->fa2_size = txdr_unsigned(vap->va_size); 2171 fp->fa2_blocksize = txdr_unsigned(vap->va_blocksize); 2172 if (vap->va_type == VFIFO) 2173 fp->fa2_rdev = 0xffffffff; 2174 else 2175 fp->fa2_rdev = txdr_unsigned(vap->va_rdev); 2176 fp->fa2_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); 2177 fp->fa2_fsid = txdr_unsigned(vap->va_fsid); 2178 fp->fa2_fileid = txdr_unsigned(vap->va_fileid); 2179 txdr_nfsv2time(&vap->va_atime, &fp->fa2_atime); 2180 txdr_nfsv2time(&vap->va_mtime, &fp->fa2_mtime); 2181 txdr_nfsv2time(&vap->va_ctime, &fp->fa2_ctime); 2182 } 2183 } 2184 2185 /* 2186 * nfsrv_fhtovp() - convert a fh to a vnode ptr (optionally locked) 2187 * - look up fsid in mount list (if not found ret error) 2188 * - get vp and export rights by calling VFS_FHTOVP() 2189 * - if cred->cr_uid == 0 or MNT_EXPORTANON set it to credanon 2190 * - if not lockflag unlock it with VOP_UNLOCK() 2191 */ 2192 int 2193 nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp, kerbflag, pubflag) 2194 fhandle_t *fhp; 2195 int lockflag; 2196 struct vnode **vpp; 2197 struct ucred *cred; 2198 struct nfssvc_sock *slp; 2199 struct mbuf *nam; 2200 int *rdonlyp; 2201 int kerbflag; 2202 { 2203 register struct mount *mp; 2204 register int i; 2205 struct ucred *credanon; 2206 int error, exflags; 2207 struct sockaddr_in *saddr; 2208 2209 *vpp = (struct vnode *)0; 2210 2211 if (nfs_ispublicfh(fhp)) { 2212 if (!pubflag || !nfs_pub.np_valid) 2213 return (ESTALE); 2214 fhp = &nfs_pub.np_handle; 2215 } 2216 2217 mp = vfs_getvfs(&fhp->fh_fsid); 2218 if (!mp) 2219 return (ESTALE); 2220 error = VFS_CHECKEXP(mp, nam, &exflags, &credanon); 2221 if (error) 2222 return (error); 2223 error = VFS_FHTOVP(mp, &fhp->fh_fid, vpp); 2224 if (error) 2225 return (error); 2226 2227 if (!(exflags & (MNT_EXNORESPORT|MNT_EXPUBLIC))) { 2228 saddr = mtod(nam, struct sockaddr_in *); 2229 if (saddr->sin_family == AF_INET && 2230 ntohs(saddr->sin_port) >= IPPORT_RESERVED) { 2231 vput(*vpp); 2232 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2233 } 2234 } 2235 /* 2236 * Check/setup credentials. 2237 */ 2238 if (exflags & MNT_EXKERB) { 2239 if (!kerbflag) { 2240 vput(*vpp); 2241 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2242 } 2243 } else if (kerbflag) { 2244 vput(*vpp); 2245 return (NFSERR_AUTHERR | AUTH_TOOWEAK); 2246 } else if (cred->cr_uid == 0 || (exflags & MNT_EXPORTANON)) { 2247 cred->cr_uid = credanon->cr_uid; 2248 cred->cr_gid = credanon->cr_gid; 2249 for (i = 0; i < credanon->cr_ngroups && i < NGROUPS; i++) 2250 cred->cr_groups[i] = credanon->cr_groups[i]; 2251 cred->cr_ngroups = i; 2252 } 2253 if (exflags & MNT_EXRDONLY) 2254 *rdonlyp = 1; 2255 else 2256 *rdonlyp = 0; 2257 if (!lockflag) 2258 VOP_UNLOCK(*vpp, 0); 2259 return (0); 2260 } 2261 2262 /* 2263 * WebNFS: check if a filehandle is a public filehandle. For v3, this 2264 * means a length of 0, for v2 it means all zeroes. nfsm_srvmtofh has 2265 * transformed this to all zeroes in both cases, so check for it. 2266 */ 2267 int 2268 nfs_ispublicfh(fhp) 2269 fhandle_t *fhp; 2270 { 2271 char *cp = (char *)fhp; 2272 int i; 2273 2274 for (i = 0; i < NFSX_V3FH; i++) 2275 if (*cp++ != 0) 2276 return (FALSE); 2277 return (TRUE); 2278 } 2279 2280 /* 2281 * This function compares two net addresses by family and returns TRUE 2282 * if they are the same host. 2283 * If there is any doubt, return FALSE. 2284 * The AF_INET family is handled as a special case so that address mbufs 2285 * don't need to be saved to store "struct in_addr", which is only 4 bytes. 2286 */ 2287 int 2288 netaddr_match(family, haddr, nam) 2289 int family; 2290 union nethostaddr *haddr; 2291 struct mbuf *nam; 2292 { 2293 register struct sockaddr_in *inetaddr; 2294 2295 switch (family) { 2296 case AF_INET: 2297 inetaddr = mtod(nam, struct sockaddr_in *); 2298 if (inetaddr->sin_family == AF_INET && 2299 inetaddr->sin_addr.s_addr == haddr->had_inetaddr) 2300 return (1); 2301 break; 2302 #ifdef ISO 2303 case AF_ISO: 2304 { 2305 register struct sockaddr_iso *isoaddr1, *isoaddr2; 2306 2307 isoaddr1 = mtod(nam, struct sockaddr_iso *); 2308 isoaddr2 = mtod(haddr->had_nam, struct sockaddr_iso *); 2309 if (isoaddr1->siso_family == AF_ISO && 2310 isoaddr1->siso_nlen > 0 && 2311 isoaddr1->siso_nlen == isoaddr2->siso_nlen && 2312 SAME_ISOADDR(isoaddr1, isoaddr2)) 2313 return (1); 2314 break; 2315 } 2316 #endif /* ISO */ 2317 default: 2318 break; 2319 }; 2320 return (0); 2321 } 2322 2323 2324 /* 2325 * The write verifier has changed (probably due to a server reboot), so all 2326 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the 2327 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT 2328 * flag. Once done the new write verifier can be set for the mount point. 2329 */ 2330 void 2331 nfs_clearcommit(mp) 2332 struct mount *mp; 2333 { 2334 register struct vnode *vp, *nvp; 2335 register struct buf *bp, *nbp; 2336 int s; 2337 2338 s = splbio(); 2339 loop: 2340 for (vp = mp->mnt_vnodelist.lh_first; vp; vp = nvp) { 2341 if (vp->v_mount != mp) /* Paranoia */ 2342 goto loop; 2343 nvp = vp->v_mntvnodes.le_next; 2344 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 2345 nbp = bp->b_vnbufs.le_next; 2346 if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT)) 2347 == (B_DELWRI | B_NEEDCOMMIT)) 2348 bp->b_flags &= ~B_NEEDCOMMIT; 2349 } 2350 } 2351 splx(s); 2352 } 2353 2354 /* 2355 * Map errnos to NFS error numbers. For Version 3 also filter out error 2356 * numbers not specified for the associated procedure. 2357 */ 2358 int 2359 nfsrv_errmap(nd, err) 2360 struct nfsrv_descript *nd; 2361 register int err; 2362 { 2363 register short *defaulterrp, *errp; 2364 2365 if (nd->nd_flag & ND_NFSV3) { 2366 if (nd->nd_procnum <= NFSPROC_COMMIT) { 2367 errp = defaulterrp = nfsrv_v3errmap[nd->nd_procnum]; 2368 while (*++errp) { 2369 if (*errp == err) 2370 return (err); 2371 else if (*errp > err) 2372 break; 2373 } 2374 return ((int)*defaulterrp); 2375 } else 2376 return (err & 0xffff); 2377 } 2378 if (err <= ELAST) 2379 return ((int)nfsrv_v2errmap[err - 1]); 2380 return (NFSERR_IO); 2381 } 2382 2383 /* 2384 * Sort the group list in increasing numerical order. 2385 * (Insertion sort by Chris Torek, who was grossed out by the bubble sort 2386 * that used to be here.) 2387 */ 2388 void 2389 nfsrvw_sort(list, num) 2390 register gid_t *list; 2391 register int num; 2392 { 2393 register int i, j; 2394 gid_t v; 2395 2396 /* Insertion sort. */ 2397 for (i = 1; i < num; i++) { 2398 v = list[i]; 2399 /* find correct slot for value v, moving others up */ 2400 for (j = i; --j >= 0 && v < list[j];) 2401 list[j + 1] = list[j]; 2402 list[j + 1] = v; 2403 } 2404 } 2405 2406 /* 2407 * copy credentials making sure that the result can be compared with memcmp(). 2408 */ 2409 void 2410 nfsrv_setcred(incred, outcred) 2411 register struct ucred *incred, *outcred; 2412 { 2413 register int i; 2414 2415 memset((caddr_t)outcred, 0, sizeof (struct ucred)); 2416 outcred->cr_ref = 1; 2417 outcred->cr_uid = incred->cr_uid; 2418 outcred->cr_gid = incred->cr_gid; 2419 outcred->cr_ngroups = incred->cr_ngroups; 2420 for (i = 0; i < incred->cr_ngroups; i++) 2421 outcred->cr_groups[i] = incred->cr_groups[i]; 2422 nfsrvw_sort(outcred->cr_groups, outcred->cr_ngroups); 2423 } 2424
Indexes created Tue Sep 23 07:09:52 GMT 2025